JP2015003767A - Method for forming sealing band and apparatus for forming sealing band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing container comprising a body and a lid body and closed with a sealing band which can inexpensively secure sealing performance between the body and the lid body, and allows opening work of the container to be easily performed without deforming the body or the lid body.SOLUTION: A packing container 200 comprising a body 210 and a lid body 220 fitted thereto, is sealed with a sealing band 60 thermally contracted only side faces of the body 210 after storing content therein and the lid body 220 fitted thereto, around a boundary part 230 between them.

Description

 The present invention relates to a packaging container closed with a bandage, a method for forming a bandage, and a device for forming a bandage, and in particular, for sealing a packaging container closed with a bandage, which includes a main body and a lid, and the packaging container. The present invention relates to a method and an apparatus for forming an envelope.

 2. Description of the Related Art In recent years, foods such as lunch boxes and prepared dishes have been actively sold by being packed in packaging containers made up of a main body and a lid formed of a plastic sheet. Then, in order to prevent foreign matter from mixing into the packaging container or to prevent liquid juice from spilling out from the packaging container, the whole is “wrapped” (patent document 1) or “shrink film” (patent document). 2) etc.

Japanese Patent No. 3090263 Japanese Patent Laid-Open No. 5-32235, abstract, FIGS. 14 and 15

  However, as in the techniques of Patent Documents 1 and 2, if the entire packaging container is wrapped with wraps or the like, “sealing” will be sufficient, but a large amount of wraps will be used. Although only the packaging is performed, the overall cost is increased, and the packaging container is easily deformed by a force from a wrap or the like.

  In addition, when opening the container, the wrap or the like enclosing the entire packaging container must be completely removed. Most of these wraps are made of a transparent material so that the contents inside the packaging container can be seen well, so it is very difficult to find a “clue” for peeling. Since the amount of wrapped wraps is large, the opening operation of the container is very troublesome.

 In particular, in the “food container packaging method” of Patent Document 2, “the heat shrinkable plastic films 14a and 14b are used as packaging films, and a film pocket 14c capable of storing chopsticks, forks, spoons, etc. on the inner surface thereof. And the chopsticks 11 are accommodated in this, and the film is wound around the side wall surface of the food container 10 packed with cooked rice, side dish, etc. to form a tube surrounding the container, and then the tube is heat-shrinked. Because the heat shrinkage force is applied to the container as a tightening force, it is easy to automate packaging with chopsticks, unlike the method of attaching chopsticks to the side of the container with an adhesive, etc. And the degree of freedom in designing the container form is increased. "

  However, in the technique proposed in Patent Document 2, as described above and as shown in FIGS. 19A and 19B, the “heat-shrinkable plastic film” is more expensive than a general film. ”Is performed in large quantities, and it is not only very expensive to simply seal and dispose of it after use, but it also complicates the peeling work at the time of opening. It is.

In short, in a packaging container composed of this type of main body and a lid fitted to the main body, as a means for ensuring hermeticity after the contents are packed in the main body, "wrap" or " When applying "shrink film", the following points must be fully considered and improved.
・ Do not incur costs ・ Make it easy to peel off or remove ・ Do not deform the main body or lid when wrapping or wrapping shrink film

  Therefore, the present inventors have conducted various studies on how to improve the above points, and as a result, in a packaging container comprising a main body and a lid fitted to the main body, If only the boundary part between the main body and the lid is sealed, the sealing property of the packaging container can be ensured, and the boundary part is noticed that the rigidity is higher than the other parts of the container. It was completed.

  In other words, the object of the present invention is to ensure that the main body and the lid can be sealed at low cost, without deforming the main body and the lid, and to easily open the container. An object of the present invention is to provide a packaging container closed with a bandage, a method for forming a bandage, and a bandage forming apparatus.

In order to solve the above problems, first, the means taken by the present invention will be described with reference numerals used in the description of the best mode to be described later.
“In the packaging container 200 including the main body 210 and the lid body 220 fitted thereto,
A packaging container characterized in that only the side surface of the main body 210 and the lid body 220 fitted to the main body 210 after the contents are stored is sealed with a bandage 60 that is thermally contracted around the boundary portion 230. 200 "
It is.

  That is, the packaging container 200 according to the present invention is thermally contracted around the boundary portion 230 between the main body 210 and the lid body 220 constituting the packaging container 200 as shown in FIG. The sealing band 60 seals only the side surface of the main body 210 after the contents are stored and the lid body 220 fitted thereto, and the sealing band 60 increases the sealing performance. . In addition, the enveloping band 60 has a length that is at most equal to or less than the height of the side surface of the packaging container 200, and is not as large as shown in FIG.

  As shown in FIG. 1A, the enveloping band 60 is formed by winding a heat-shrinkable film 64 around the boundary portion 230 on the side surface of the main body 210 and the lid body 220 fitted thereto. Although the temporary sealing band 60a is heat-shrinked, the width of the temporary sealing band 60a is equal to or less than the height of the side surface of the packaging container 200 even at the stage of the temporary sealing band 60a. It is not a significant one as shown in (a).

  For this reason, the heat-shrinkable film 64 used for sealing the packaging container 200 is suppressed to 1/3 or less in width as compared with the conventional film used in FIG. Therefore, the packaging container 200 can be sealed at a low cost.

  Further, since the sealing band 60 is present around the boundary portion 230 having high rigidity, even if the sealing band 60 is formed by thermally shrinking the temporary sealing band 60a, the main body 210 and the lid body 220 are formed. Will not be deformed. This is because the sealing band 60 is formed only on the side surface of the main body 210 and the lid body 220 fitted to the main body 210 even in the state of the temporary sealing band 60a of the previous stage. This is because it does not hang on the bottom surface or the top surface (top plate surface) of the lid 220 and does not become a source of force that deforms the main body 210 or the lid 220.

  Further, since the sealing band 60 is present around the boundary portion 230 having high rigidity, the sealing band 60 can be easily separated and removed, and as a result, the packaging container 200 is opened. Can be easily done. This is because the band 60 has its upper or lower edge centered on the boundary portion 230, so that the portion to be broken or cut can be clearly seen. As shown in FIG. 19A and FIG. 19A, the upper edge or the lower edge of the heat-shrinkable bag 60 is completely a packaging container. This is because it is not in close contact with the side surface of 200 and is slightly apart.

 Therefore, the packaging container 200 provided with the bandage 60 according to the present invention can secure the sealing property of the main body 210 and the lid body 220 at low cost, without deforming the main body 210 and the lid body 220, The opening operation of the packaging container 200 can be easily performed.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 1 is:
“The packaging container 200 in which the lid body 220 is fitted to the main body 210 after storing the contents is transported toward the heating device 50 by the transport belt 10, and the boundary portion 230 between the main body 210 and the lid body 220 is centered. A method of sealing with a bandage 60,
The heat-shrinkable films 64 and 64 to be the bandage 60 can be sequentially fed out by the film guide devices 20 disposed on the left and right sides of the conveying belt 10, and the front ends of the heat-shrinkable films 64 and 64 are formed by the second welded part 62. Keep connected
When the packaging container 200 is transported to the place beyond the heat shrink film 64 by the transport belt 10, the transport belt 10 is stopped, and the container pressing device 30 disposed above the transport belt 10 is lowered to lower the packaging container. 200 is pressed onto the conveyor belt 10 and fixed.
The welding and cutting devices 40 and 40 disposed on the left and right sides of the conveyor belt 10 and upstream of the heat shrink film 64 are moved to the downstream side in the vicinity of the left and right sides of the packaging container 200, and then the left and right sides. The first and second welded portions 61 and 62 for both heat shrinkable films 64 and 64 are encased in both sides of the boundary portion 230 by both the heat shrinkable films 64 and 64 by moving the welding and cutting devices 40 and 40 forward and backward. And the formation of the cut portion 63 between them to form a temporary sealing band 60a wrapped around the boundary portion 230 of the packaging container 200,
Next, the container holding device 30 is raised to release the fixation of the packaging container 200, and then the transport belt 10 is redriven to transport the packaging container 200 into the heating device 50, which is temporarily sealed by the heating device 50. A sealing band forming method for a packaging container characterized in that the sealing band 60 is formed by heat-shrinking the band 60a to perform sealing around the boundary portion 230 of the packaging container 200.
It is.

  That is, in the sealing band forming method according to claim 1, the packaging container 200 in which the lid body 220 is fitted to the main body 210 after the contents are stored is directed from the starting point toward the heating device 50 by the conveyor belt 10. During the conveyance while repeating the conveyance and the stop, only the side surface of the packaging container 200 is formed with a temporary sealing band 60a composed of the heat-shrinkable film 64 centering on the boundary portion 230, and this temporary sealing band 60a. Is heated in a heating step in the heating device 50 to be heat-shrinked to form a bandage 60.

  As in the case of the packaging container 200 according to the present invention, as shown in FIG. 1 (b), the sealing band 60 is a boundary between the main body 210 and the lid body 220 constituting the packaging container 200. It is heat-shrinkable around the portion 230 and seals only the side surface of the main body 210 after the contents are stored and the lid body 220 fitted thereto. The sealing property of the container 200 is increased. In addition, the envelope 60 has a length that is at most equal to or less than the height of the side surface of the packaging container 200, and is not as large as shown in FIG. This is the same as the packaging container 200 according to the present invention.

  Further, as shown in FIG. 1A, the envelope 60 is formed by winding a heat-shrinkable film 64 around the boundary portion 230 on the side surface of the main body 210 and the lid body 220 fitted thereto. The formed temporary sealing band 60a is formed by thermal contraction. Even at the stage of the temporary sealing band 60a, the width of the temporary sealing band 60a is equal to or less than the height of the side surface of the packaging container 200. Yes, it is not significant as shown in FIG.

  For this reason, the heat-shrinkable film 64 used in the sealing band forming method of claim 1 is suppressed to 1/3 or less in width as compared with the conventional film used in FIG. Therefore, the packaging container 200 can be sealed at a low cost.

  In this enveloping method, first, the conveyor belt 10 is driven, and the packaging container 200 thereon is connected to each other at the second welded portion 62 as shown in FIG. To the downstream side. At this time, the left and right heat shrink films 64 and 64 lie above the transport belt 10 while being connected to each other at the second welded portion 62 and orthogonal to the transport belt 10.

  In other words, the film guiding device 20 lifts the heat-shrinkable film 64 until the packaging container 200 passes below the heat-shrinkable film 64. As described below, the packaging container 200 passes. Then, the heat-shrinkable film 64 is lowered so that the second welded portion 62 connecting the heat-shrinkable films 64 is located on the packaging container 200, particularly on the rear surface of the boundary portion 230. The vertical movement of the film guide device 20 is performed by a limit switch (not shown) provided in the machine frame, and is performed by detecting the packaging container 200 carried in by the transport belt 10.

 When the packaging container 200 is transported to a predetermined position by the transport belt 10, the transport belt 10 is stopped and the heat-shrinkable film 64 is lowered to the predetermined position by the film guiding device 20. It is determined by the limit switch. When the two heat-shrinkable films 64 are lowered, as shown in FIG. 2, the second welded portion 62 connecting the two heat-shrinkable films 64 is formed on the packaging container 200, particularly on the rear surface side of the boundary portion 230. It will be located (upstream). At this time, the container pressing device 30 is lowered, and the packaging container 200 immediately below the container holding device 30 is fixed on the conveyor belt 10. At this time, as shown in FIG. 2, each welding and cutting device 40 is arranged on the left and right sides of the conveyor belt 10 and on the upstream side of the heat shrink film 64.

 As shown in FIG. 3, the welding and cutting devices 40 and 40 arranged on the upstream side of the heat shrink film 64 are first brought close to the left and right side surfaces of the packaging container 200, and thereafter, the arrows in FIG. As shown, it is moved downstream. When these welding and cutting devices 40 and 40 are located on the front end surface of the packaging container 200, they advance so as to contact each other, and as shown in FIG. Wrapping is done.

  Then, when these welding and cutting devices 40 are brought into contact with each other or between being brought into contact with each other and separated from each other, for example, on the front end surface of the packaging container 200 opposite to that described in FIG. The first and second welded portions 61 and 62 are formed on the heat shrink films 64 and 64, and the cut portion 63 is formed therebetween. Thereafter, each welding and cutting device 40 moves backward to complete the formation of the temporary sealing band 60a wrapped around the boundary portion 230 of the packaging container 200 as shown in FIG.

 As a result of the above, as shown in FIG. 5, the temporary sealing band 60 a centering on the boundary portion 230 is formed around the entire side surface of the packaging container 200. The temporary sealing band 60a wraps the entire periphery of the side surface portion of the packaging container 200 in a state in which some gap is allowed.

 Next, the container holding device 30 that has been lowered is moved up, and the transport belt 10 that has been stopped is driven again, so that the packaging container 200 is transported into the heating device 50. The heating device 50 is configured to apply heat to the heat-shrinkable film 64 with hot air or the like. When the temporary sealing band 60a is heat-shrinked by the heating device 50, as shown in FIG. In this way, the sealing band 60 that is sealed around the boundary portion 230 of the packaging container 200 is formed.

  Further, since the sealing band 60 is present around the boundary portion 230 having high rigidity, the sealing band 60 can be easily separated and removed, and as a result, the packaging container 200 is opened. It is the same as that of the packaging container 200 according to the present invention described above that can be easily performed. This is because the band 60 has its upper or lower edge centered on the boundary portion 230, so that the portion to be broken or cut can be clearly seen. As shown in FIG. 19A and FIG. 19A, the upper edge or the lower edge of the heat-shrinkable bag 60 is completely a packaging container. This is because it is not in close contact with the side surface of 200 and is slightly apart.

 Therefore, in the method for forming the envelope 60 according to the first aspect, the sealing property between the main body 210 and the lid body 220 of the packaging container 200 provided with this can be secured at low cost. In addition, the opening operation of the packaging container 200 can be easily performed.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 2 is similarly:
“The packaging container 200 in which the lid body 220 is fitted to the main body 210 after storing the contents is transported toward the heating device 50 by the transport belt 10, and the boundary portion 230 between the main body 210 and the lid body 220 is centered. A method of sealing with a bandage 60,
The heat-shrinkable films 64 and 64 to be the bandage 60 can be sequentially fed out by the film guide devices 20 disposed on the left and right sides of the conveying belt 10, and the front ends of the heat-shrinkable films 64 and 64 are formed by the second welded part 62. Keep connected
When the wearing container 200 transported by the transport belt 10 is positioned in front of the heat-shrinkable films 64 and 64, the container pressing device 30 disposed above is lowered, and the packaging container 200 is pressed onto the transport belt 10. The front side of the boundary portion 230 and the left and right side surfaces of the boundary portion 230 are fixed by driving the conveyor belt 10 as it is, and the heat shrink films 64 and 64 on both the left and right sides connected to each other by the second welding portion 62 on the front surface of the packaging container 200. Wrapping
Next, with respect to the packaging container 200 which is stopped on the conveyor belt 10 and fixed on it, both heat shrink films are formed by advancing and retreating the welding and cutting devices 40 and 40 on both the left and right sides. Wrapping of the rear side surface of the boundary portion 230 by 64 and 64, forming the first and second welded portions 61 and 62 on both heat shrink films 64 and 64, and forming the cut portion 63 therebetween, to form the boundary portion 230 to form a temporary sealing band 60a enclosing all sides of 230,
Further, after the container holding device 30 is lifted to release the fixing of the packaging container 200, the transport belt 10 is driven again to transport the packaging container 200 into the heating device 50, and the heating device 50 temporarily seals it. A sealing band forming method for a packaging container characterized in that the sealing band 60 is formed by heat-shrinking the band 60a to perform sealing around the boundary portion 230 of the packaging container 200.
It is.

  That is, in the sealing band forming method according to claim 2, the packaging container 200 in which the lid body 220 is fitted to the main body 210 after the contents are stored is transported toward the heating device 50 by the transport belt 10. , A method of sealing with a bandage 60 around a boundary portion 230 between the main body 210 and the lid body 220, while the conveyance belt 10 conveys the side surface of the packaging container 200 from the starting point to the heating device 50. Only about the boundary part 230, the temporary sealing band 60a which consists of the heat-shrinkable film 64 is formed, and this lid 220 is heat-shrinked by the heating process in the heating apparatus 50, and the sealing band 60 is formed. To do.

  As in the case of the packaging container 200 according to the present invention, as shown in FIG. 1 (b), the sealing band 60 is a boundary between the main body 210 and the lid body 220 constituting the packaging container 200. It is heat-shrinkable around the portion 230, and seals only the side surface of the main body 210 after the contents are stored and the lid body 220 fitted thereto. Is high. In addition, the envelope 60 has a length, which is not more than the height of the side surface of the packaging container 200 at most, and even at the stage of the temporary envelope 60a, FIG. It is not significant as shown in

  In this enveloping method, first, as shown in FIGS. 6-9, the conveyance belt 10 is driven and the packaging container 200 on it is conveyed downstream. At this time, the left and right heat-shrinkable films 64 and 64 lie in a state where they are connected to each other at the second welding portion 62 and orthogonal to the conveying belt 10, unlike the case of the method of claim 1 described above. Therefore, the packaging container 200 is fed so as to push the goal tape, and these heat-shrinkable films 64 are wrapped around the boundary portions 230 on the front side surface and the left and right side surfaces of the packaging container 200. Do it.

 Next, the conveyance belt 10 is stopped. This stop position is determined by a limit switch (not shown) provided in the machine frame, and when the packaging container 200 comes directly below the container pressing device 30. Stopped at. Therefore, the container holding device 30 is operated to fix the packaging container 200 onto the transport belt 10.

  Therefore, for the packaging container 200 fixed on the conveyor belt 10, as shown in FIGS. 9 to 13, the left and right welding and cutting devices 40 arranged on the downstream side (the rear side of the packaging container 200). • Move the 40 forwards and backwards. If these welding and cutting devices 40 and 40 move forward with each other, as shown by the solid line in FIG. 9, both heat shrink films 64 and 64 are brought close to the center of the conveyor belt 10, and FIG. As shown in FIG. 4, the rear side surface of the packaging container 200 is wrapped by the heat shrink films 64 and 64. Moreover, if these welding and cutting devices 40 and 40 come into contact with each other at the front surface, as shown in FIG. 13, the formation of the first and second welding portions 61 and 62 with respect to these heat shrink films 64 and 64, The cutting part 63 is formed between them.

 As a result of the above, as shown in FIG. 12, the temporary sealing band 60 a centering on the boundary portion 230 is formed around the entire side surface of the packaging container 200. The temporary sealing band 60a wraps the entire periphery of the side surface portion of the packaging container 200 in a state in which some gap is allowed.

  Furthermore, the container 200 for packaging is conveyed in the heating apparatus 50 by driving the conveyance belt 10 which has been stopped again. The heating device 50 is configured to apply heat to the heat-shrinkable film 64 with hot air or the like. When the temporary sealing band 60a is heat-shrinked by the heating device 50, as shown in FIG. In this way, the sealing band 60 that is sealed around the boundary portion 230 of the packaging container 200 is formed.

  In the method for forming a seal band according to claim 2, the amount of a soft film or heat shrinkable film for sealing can be reduced, and the packaging container 200 can be sealed at a low cost. 60 is present around the boundary portion 230 where the rigidity is high, so that the main body 210 and the lid body 220 are not deformed by the formation of the sealing band 60 and the temporary sealing band 60a. This is the same as that of the first aspect described above.

  Further, in the sealing band forming method according to the second aspect, the packaging container 200 is fixed on the transport belt 10 by the container pressing device 30, and the packaging container 200 is temporarily sealed while being wrapped with the heat-shrinkable film 64. Since the band 60a is formed, a large load is not applied to the main body 210 and the lid body 220, and the main body 210 and the lid body 220 are not deformed.

 Of course, the sealing band 60 formed by the above method can be easily separated and removed as in the case of the sealing band 60 in the packaging container 200 of the present invention. As a result, the packaging container 200 can be easily opened. An enveloping band 60 can be formed so as to be able to be performed.

 Therefore, the sealing band forming method according to claim 2 can reliably form the sealing band 60 that ensures the sealing between the main body 210 and the lid body 220 at a low cost, without deforming the main body 210 and the lid body 220. In addition, it is possible to form a band 60 that can easily open the packaging container 200.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 3 relates to the method for forming a sealing band of a packaging container according to claim 1 or 2,
“With respect to the packaging container 200 fixed on the conveyor belt 10, the guide rollers 21 of the film guide devices 20 are advanced relative to each other before the left and right welding and cutting devices 40, 40 arranged on the downstream side thereof are moved forward and backward. As a result, the heat shrink films 64 and 64 are moved toward the center of the conveyor belt 10 to assist the wrapping of the heat shrink films 64 and 64 on the rear side of the packaging container 200. What I did "
It is.

  In the sealing band forming method according to the third aspect, before the left and right welding and cutting devices 40 and 40 arranged on the downstream side of the packaging container 200 fixed on the conveyor belt 10 are advanced and retracted, By causing the guide rollers 21 of the film guide device 20 to advance each other, the guide rollers 21 cause the heat shrink films 64 and 64 to move toward the center of the transport belt 10.

 In other words, in the sealing band forming method according to the third aspect, the heat-shrinkable film 64 is moved toward the center of the belt 10 before the left and right welding and cutting devices 40 and 40 advance and retract from each other. Therefore, the heat shrinkable films 64 that proceed thereafter are aligned with each other without applying unnecessary tension, and as indicated by a virtual line in FIG. Thus, the rear side surface of the packaging container 200 is wrapped with the heat shrink films 64 and 64 without difficulty.

 Of course, after the heat-shrinkable films 64 are brought close to the center of the belt 10, if the welding and cutting devices 40 and 40 come into contact with each other on the front surface, as shown in FIG. The formation of the first and second welded portions 61 and 62 on the heat shrink films 64 and 64 and the formation of the cut portion 63 therebetween are performed in the case of the enveloping method according to claim 1 or claim 2. It is the same.

 Therefore, in the sealing band forming method according to the third aspect, in addition to exhibiting the same effect as the first aspect or the second aspect, each guide roller 21 does not generate excessive tension on the heat-shrinkable film 64. The sealing band 60a can be formed.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 4 relates to the method for forming a sealing band of a packaging container according to any one of claims 1 to 3,
“The thermal shrinkage of the temporary sealing strip 60a in the heating device 50
Preliminary shrinkage that incompletely shrinks the temporary sealing strip 60a in order to position and attach the temporary sealing strip 60a to the packaging container 200 by blowing hot air on the upper and lower sides of the packaging container 200 transported by the transport belt 10 When,
While transporting the packaging container 200 at a speed slower than that at the time of the previous stage shrinkage, hot air is blown from the left and right sides and the upper side of the packaging container 200 with a larger air volume than at the time of the previous stage shrinkage, and the temporary sealing band 60a is completely shrunk. It was divided into post-stage contraction. ''
It is characterized by.

  In this method of forming the bandage according to claim 4, the heat shrinkage due to heating in the heating device 50 is divided into two types, a pre-stage process for incomplete shrinkage and a post-stage process for complete shrinkage. Position adjustment by incomplete shrinkage of the temporary sealing band 60a with respect to the packaging container 200 is mainly performed, and in the subsequent contraction, the temporary sealing band 60a is completely contracted, and the sealing band 60 that is in close contact with the boundary portion 230 of the packaging container 200 is removed. It is to be formed.

 In other words, in the first stage shrinkage that is incompletely shrunk, hot air is blown up and down on both side surfaces of the packaging container 200 that is transported by the transport belt 10 so that the boundary portion 230 of the packaging container 200 is in a “loose” state. The temporary sealing band 60a that has been wrapped is slightly contracted (incomplete contraction) to eliminate the looseness. The temporary sealing band 60a that has lost its looseness is not displaced with respect to the boundary portion 230 of the packaging container 200. As a result, the temporary sealing band 60a is incomplete before being completely contracted. The positioning with respect to the packaging container 200 is performed by a simple contraction operation.

  In the subsequent post-shrinkage, hot air is blown from the left and right sides and the upper side of the packaging container 200 with a larger air volume than in the pre-shrinkage while the packaging container 200 is transported at a slower speed than that in the previous pre-shrinkage. Thus, the temporary sealing band 60a is completely contracted.

 Therefore, in the sealing band forming method according to the fourth aspect, the same effect as that of any of the first to third aspects is exhibited, and the temporary sealing band 60a is evenly contracted around the boundary portion 230. The main body 210 and the lid body 220 are not deformed when the sealing band 60 is formed from the temporary sealing band 60a.

And in order to solve the said subject, the means which the invention which concerns on Claim 5 took are as follows.
“Only in the side surface of the packaging container 200 composed of the main body 210 and the lid body 220, the sealant forming apparatus 100 that forms the sealant 60 composed of the heat-shrinkable film 64 at the boundary portion 230 between the main body 210 and the lid body 220. Because
A transport belt 10 supported horizontally in the machine frame and transporting the packaging container 200 from at least the starting point toward the heating device 50 while transporting and stopping; and
By moving the packaging container 200 transported on the transport belt 10, the heat-shrinkable films 64 and 64 disposed on the left and right sides of the transport belt 10 and connected at the leading ends thereof by the second welding portions 62 are moved. A film guide device 20 that feeds out at least the front side surface and the left and right side surfaces of the packaging container 200;
A container pressing device 30 that descends onto the packaging container 200 that has been stopped when moved forward of the film guiding device 20 and temporarily fixes the packaging container 200 on the conveyor belt 10;
The packaging container 200 fixed by the container pressing device 30 advances and retreats in opposition to each other, sends out the heat-shrinkable film 64 to the rear side surface of the packaging container 200, and both heats due to mutual contact. A pair of left and right welds that return to their original positions after forming the temporary sealing band 60a by forming the second welded portion 62, the first welded portion 61, and the cut portion 63 in the overlapping portion of the shrinkable film 64 and A cutting device 40;
The packaging container 200 constituting the temporary sealing band 60a is transported by the transport belt 10 so that the temporary sealing band 60a is thermally contracted to form the sealing band 60 inside. Envelope forming apparatus 100 "
It is.

  As shown in FIGS. 14 to 18, the envelope forming apparatus 100 according to claim 5 forms the packaging container 200 sealed with the envelope 60 of the present invention, The enveloping method according to claim 2 is embodied. And about each member which comprises this sealing band formation apparatus 100, the code | symbol same as the code | symbol used in the said invention and the invention which concerns on Claims 2-4 is attached | subjected, and description is also illustrated. Therefore, the description is omitted.

  According to the sealing band forming apparatus 100, the amount of a soft film or heat shrinkable film for sealing can be reduced, and the packaging container 200 can be sealed at a low cost. The sealing band 60 that can be formed in the above can be present around the boundary portion 230 having high rigidity. Therefore, in order to form the sealing band 60 and the temporary sealing band 60a in the previous stage of the packaging container 200, The main body 210 and the lid 220 are not deformed.

 Of course, the sealing band 60 formed by the sealing band forming device 100 and the container pressing device 30 can be easily separated and removed, and as a result, the packaging container 200 can be easily opened.

 Therefore, the device for forming a seal band 100 according to claim 5 can embody the method for forming a seal band according to claims 2 to 5, and can ensure the sealing performance of the main body 210 and the lid body 220 at a low cost. 60, the main body 210 and the lid 220 are not deformed when the sealing band 60 is formed, and the sealing band 60 can be easily broken or removed. It is also possible to form a packaging container 200 that can easily perform 60 opening operations.

Further, the means taken by the invention according to claim 6 is about the sealing band forming device 100 for packaging containers according to claim 5 above.
“Assuming that the film guide device 20 is provided with guide rollers 21 for advancing and retracting toward the center of the conveyor belt 10 and guiding each heat-shrinkable film 64, the guide rollers 21 are connected to the right and left welding and cutting devices 40 It is assumed that 40 advances to each other before moving forward and backward, and the guide rollers 21 move the heat shrink films 64 and 64 toward the center of the conveyor belt 10 and wrap the two heat shrink films 64 and 64. Assistance of the wrapping at the rear side of the container 200 for use "
It is.

  In the sealing band forming apparatus 100 according to claim 6, before the left and right welding and cutting devices 40, 40 arranged on the downstream side of the packaging container 200 fixed on the conveying belt 10 are advanced and retracted, As the guide rollers 21 of the film guide devices 20 advance, the heat-shrinkable films 64 and 64 are first moved toward the center of the transport belt 10 by the guide rollers 21.

 In other words, in the sealing band forming apparatus 100 according to the sixth aspect, before the left and right welding and cutting apparatuses 40 and 40 move forward and backward, the guide rollers 21 move to the center of the belt 10 of the heat shrinkable film 64. 9, the heat-shrinkable film 64 is aligned without any unnecessary tension by the welding and cutting devices 40 that proceed thereafter, and the phantom line in FIG. 9. As shown by, the rear side surface of the packaging container 200 by both heat-shrinkable films 64 and 64 can be easily wrapped.

 Of course, after the heat-shrinkable films 64 are brought close to the center of the belt 10, if the welding and cutting devices 40 and 40 come into contact with each other on the front surface, as shown in FIG. The formation of the first and second welded portions 61 and 62 on the heat-shrinkable films 64 and 64 and the formation of the cut portion 63 between them are the same as in the seal band forming apparatus 100 of claim 5.

 Therefore, in the sealing band forming method according to the sixth aspect, the temporary sealing band 60a can be obtained without exerting excessive tension on the heat-shrinkable film 64 by the guide rollers 21 in addition to exhibiting the same function as the fifth aspect. It can be formed.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 7 is related to the bandage forming apparatus 100 according to claim 5 or 6,
“A moving table 41 that supports each of the welding and cutting devices 40 movably with respect to the machine frame and a downstream portion of the moving table 41 to guide each heat-shrinkable film 64. It is assumed that the guide roller 42 and the welding heads 43a and 43b before and after performing welding of each heat-shrinkable film 64 are arranged side by side with a space before and after the conveying direction of the conveying belt 10.
With respect to one welding and cutting device 40, both welding heads 43a and 43b can move forward and backward with respect to the moving table 41, and are disposed between these welding heads 43a and 43b and attached to the moving table 41. And the cutting edge 44 having the tip toward the space of the other welding and cutting device 40 ”
It is.

  The sealing band forming apparatus 100 according to claim 7 is a more specific example of the welding and cutting device 40 constituting the sealing band forming device 40. As shown in FIG. 13 or FIG. A moving table 41 that is movably supported with respect to the machine frame, a guide roller 42 that is provided in a downstream portion of the moving table 41 and guides each heat-shrinkable film 64, and a conveying direction of the conveying belt 10 Are provided with welding heads 43a and 43b before and after the heat-shrinkable films 64 are welded side by side with a space in between.

  As shown in FIG. 18B, the guide roller 42 provided in each welding and cutting device 40 is supported on the movable table 41 while being exposed at the downstream portion of each welding and cutting device 40. As shown in FIG. 18 (a), the heat shrinkable films 64 drawn from the left and right film guiding devices 20 are supported and guided on the surface. In other words, each of the guide rollers 42 guides the thin and soft heat-shrinkable film 64 in a state where the heat-shrinkable film 64 protrudes earlier when the post-welding head 43b or the like moves forward. In order to prevent wrinkling and tearing, the main body 210 and the lid body 220 are prevented from being subjected to an unbalanced load via each heat shrinkable film 64.

 As shown in FIG. 13, the front welding head 43 a and the rear welding head 43 b are attached to the forward end surface of each welding and cutting device 40 while forming a predetermined space therebetween. The pre-welding head 43a and the post-welding head 43b form the first welding portion 61 and the second welding portion 62 on the heat-shrinkable film 64 that has been drawn out by being overlapped by two sheets. And when both welding and the cutting | disconnection apparatus 40 are faced | matched between these 1st welding parts 61 and the 2nd welding parts 62, the cutting blade 44 will protrude, and, thereby, the 1st welding part 61 and the 1st welding part 61 and the 2nd welding part 62. The two welded parts 62 are separated as shown in FIG.

 Therefore, the sealing band forming apparatus 100 according to the seventh aspect exhibits the same function as that of the fifth aspect or the sixth aspect, and when forming the temporary sealing band 60a, each heat-shrinkable film 64. 64, the temporary sealing band 60a formed by the sealing band forming device 100 is wound around the boundary portion 230 while being uniformly contracted, so that the sealing band 60 is formed therefrom. In this case, the main body 210 and the lid body 220 are not deformed.

And in order to solve the said subject, the means which the invention which concerns on Claim 8 took about the sealing band formation apparatus 100 in any one of the said Claims 5-7,
“The thermal shrinkage of the temporary sealing strip 60a in the heating device 50
Preliminary shrinkage that incompletely shrinks the temporary sealing strip 60a in order to position and attach the temporary sealing strip 60a to the packaging container 200 by blowing hot air on the upper and lower sides of the packaging container 200 transported by the transport belt 10 When,
While transporting the packaging container 200 at a speed slower than that at the time of the previous stage shrinkage, hot air is blown from the left and right sides and the upper side of the packaging container 200 with a larger air volume than at the time of the previous stage shrinkage, so that the temporary sealing band 60a is completely shrunk. It was done separately in the subsequent stage contraction.
It is.

  As shown in FIG. 14, for example, the device for forming a seal band 100 according to claim 8 divides the heat shrinkage caused by the heating in the heating device 50 into two types: a pre-stage process for incomplete shrinkage and a post-stage process for complete shrinkage. In the first-stage contraction, the position adjustment of the temporary sealing band 60a with respect to the packaging container 200 is mainly performed. In the second-stage contraction, the temporary sealing band 60a is completely contracted, and the boundary portion of the packaging container 200 is obtained. 230 is formed in close contact with 230.

 In other words, in the first stage contraction, hot air can be blown up and down on both side surfaces of the packaging container 200 conveyed by the conveyance belt 10, and the boundary portion 230 of the packaging container 200 is “loose”. The temporary sealing band 60a wrapped in the state is slightly shrunk so that the looseness is eliminated. Since the temporary sealing band 60a that has lost its looseness does not shift with respect to the boundary portion 230 of the packaging container 200, the temporary sealing band 60a in the semi-contracted state is positioned relative to the packaging container 200 as a result. It is done.

  In the subsequent post-shrinkage, hot air can be blown from the left and right sides and the upper side of the packaging container 200 with a larger air volume than in the pre-shrinkage while the packaging container 200 is being transported at a slower speed than in the previous pre-shrinkage. Thus, the temporary sealing band 60a is completely contracted.

 Therefore, the sealing band forming device 100 according to the eighth aspect of the present invention exhibits the same effect as that of the fifth or fourth aspect, and can wind the temporary sealing band 60a while being contracted evenly around the boundary portion 230. Yes, when forming the envelope 60 from the temporary envelope 60a, the main body 210 and the lid 220 are not deformed.

As described above, in the invention according to the present invention,
“In the packaging container 200 including the main body 210 and the lid body 220 fitted thereto,
Only the side surfaces of the main body 210 and the lid 220 fitted to the main body 210 after storing the contents were sealed with a bandage 60 that was thermally contracted around the boundary portion 230.
Therefore, the sealing of the main body 210 and the lid body 220 can be secured at low cost, the main body 210 and the lid body 220 are not deformed, and the opening operation can be easily performed. It is possible to provide a packaging container 200 that can be closed with a sealing band 60.

In the inventions according to claims 2 to 4,
“The packaging container 200 in which the lid body 220 is fitted to the main body 210 after storing the contents is transported toward the heating device 50 by the transport belt 10, and the boundary portion 230 between the main body 210 and the lid body 220 is centered. A method of sealing with a bandage 60,
The heat-shrinkable films 64 and 64 to be the bandage 60 can be sequentially fed out by the film guide devices 20 disposed on the left and right sides of the conveying belt 10, and the front ends of the heat-shrinkable films 64 and 64 are formed by the second welded part 62. Keep connected
When the packaging container 200 is transported to the place beyond the heat shrink film 64 by the transport belt 10, the transport belt 10 is stopped, and the container pressing device 30 disposed above the transport belt 10 is lowered to lower the packaging container. 200 is pressed onto the conveyor belt 10 and fixed.
The welding and cutting devices 40 and 40 disposed on the left and right sides of the conveyor belt 10 and upstream of the heat shrink film 64 are moved to the downstream side in the vicinity of the left and right sides of the packaging container 200, and then the left and right sides. The first and second welded portions 61 and 62 for both heat shrinkable films 64 and 64 are encased in both sides of the boundary portion 230 by both the heat shrinkable films 64 and 64 by moving the welding and cutting devices 40 and 40 forward and backward. And the formation of the cut portion 63 between them to form a temporary sealing band 60a wrapped around the boundary portion 230 of the packaging container 200,
Next, the container holding device 30 is raised to release the fixation of the packaging container 200, and then the transport belt 10 is redriven to transport the packaging container 200 into the heating device 50, which is temporarily sealed by the heating device 50. The band 60a is heat-shrinked to form the sealing band 60 that performs sealing around the boundary portion 230 of the packaging container 200 "
Or
“The packaging container 200 in which the lid body 220 is fitted to the main body 210 after storing the contents is transported toward the heating device 50 by the transport belt 10, and the boundary portion 230 between the main body 210 and the lid body 220 is centered. A method of sealing with a bandage 60,
The heat-shrinkable films 64 and 64 to be the bandage 60 can be sequentially fed out by the film guide devices 20 disposed on the left and right sides of the conveying belt 10, and the front ends of the heat-shrinkable films 64 and 64 are formed by the second welded part 62. Keep connected
When the wearing container 200 transported by the transport belt 10 is positioned in front of the heat-shrinkable films 64 and 64, the container pressing device 30 disposed above is lowered, and the packaging container 200 is pressed onto the transport belt 10. The front side of the boundary portion 230 and the left and right side surfaces of the boundary portion 230 are fixed by driving the conveyor belt 10 as it is, and the heat shrink films 64 and 64 on both the left and right sides connected to each other by the second welding portion 62 on the front surface of the packaging container 200. Wrapping
Next, with respect to the packaging container 200 which is stopped on the conveyor belt 10 and fixed on it, both heat shrink films are formed by advancing and retreating the welding and cutting devices 40 and 40 on both the left and right sides. Wrapping of the rear side surface of the boundary portion 230 by 64 and 64, forming the first and second welded portions 61 and 62 on both heat shrink films 64 and 64, and forming the cut portion 63 therebetween, to form the boundary portion 230 to form a temporary sealing band 60a enclosing all sides of 230,
Further, after the container holding device 30 is lifted to release the fixing of the packaging container 200, the transport belt 10 is driven again to transport the packaging container 200 into the heating device 50, and the heating device 50 temporarily seals it. The band 60a is heat-shrinked to form the sealing band 60 that performs sealing around the boundary portion 230 of the packaging container 200 "
Therefore, the sealing of the main body 210 and the lid body 220 can be secured at low cost, the main body 210 and the lid body 220 are not deformed, and the container 200 can be opened easily. It is possible to provide a sealing band forming method that can be performed.

Furthermore, in the invention which concerns on Claims 5-8,
“Only in the side surface of the packaging container 200 composed of the main body 210 and the lid body 220, the sealant forming apparatus 100 that forms the sealant 60 composed of the heat-shrinkable film 64 at the boundary portion 230 between the main body 210 and the lid body 220. Because
A transport belt 10 supported horizontally in the machine frame and transporting the packaging container 200 from at least the starting point toward the heating device 50 while transporting and stopping; and
By moving the packaging container 200 transported on the transport belt 10, the heat-shrinkable films 64 and 64 disposed on the left and right sides of the transport belt 10 and connected at the leading ends thereof by the second welding portions 62 are moved. A film guide device 20 that feeds out at least the front side surface and the left and right side surfaces of the packaging container 200;
A container pressing device 30 that descends onto the packaging container 200 that has been stopped when moved forward of the film guiding device 20 and temporarily fixes the packaging container 200 on the conveyor belt 10;
The packaging container 200 fixed by the container pressing device 30 advances and retreats in opposition to each other, sends out the heat-shrinkable film 64 to the rear side surface of the packaging container 200, and both heats due to mutual contact. A pair of left and right welds that return to their original positions after forming the temporary sealing band 60a by forming the second welded portion 62, the first welded portion 61, and the cut portion 63 in the overlapping portion of the shrinkable film 64 and A cutting device 40;
The packaging container 200 constituting the temporary sealing band 60a is transported by the transport belt 10 so that the temporary sealing band 60a is thermally shrunk inside to provide the heating device 50 as the sealing band 60 ".
The main feature of the structure is that the sealing of the main body 210 and the lid body 220 can be secured at low cost, the main body 210 and the lid body 220 are not deformed, and the container 200 is opened. In addition, it is possible to provide the sealing band forming apparatus 100 that can form the sealing band 60 that can be easily performed.

1 shows a packaging container 200 according to the present invention, in which (a) is a front view of a state in which the periphery of a boundary portion 230 is wrapped by a temporary sealing band 60a before becoming a sealing band 60, and (b) is a completed sealing. FIG. 6 is a perspective view of a state in which the periphery of a boundary portion 230 is sealed with a band 60. FIG. 2 is a partial perspective view of the seal band forming apparatus 100 for explaining the seal band forming method or the seal band forming apparatus 100 according to claim 1. The part which shows a mode that the both heat-shrinkable film 64 connected with the 2nd welding part 62 is guided toward the side surface of the packaging container 200 by the welding and cutting device 40 for demonstrating the sealing band formation method It is a top view. It is a partial top view which shows a mode that the front side of the packaging container 200 is wrapped with the both heat-shrinkable films 64. FIG. It is a fragmentary top view which shows a mode that each welding and the cutting device 40 begins to mutually separate. It is a fragmentary perspective view of the bandage formation apparatus 100 for demonstrating the bandage formation method or the bandage formation apparatus 100 which concerns on Claim 2. It is a fragmentary top view which shows a mode that the packaging container 200 advances toward the both heat-shrinkable film 64 connected with the 2nd welding part 62 for demonstrating the sealing band formation method. FIG. 5 is a partial plan view showing a state in which the packaging container 200 conveyed by the conveyance belt 10 pushes both heat-shrinkable films 64 forward around the second welded portion 62. Furthermore, it is a partial top view which shows a mode that the container 200 for packaging advances, drawing in both the heat-shrinkable films 64, and each welding and cutting device 40 begins to approach. FIG. 10 is a partial perspective view of the seal band forming apparatus 100 showing the state of FIG. 9. FIG. 6 is a partial plan view showing a state in which the first welding part 61 and the second welding part 62 are formed on the heat-shrinkable film 64 by both welding and cutting devices 40 coming into contact with each other. It is a fragmentary top view which shows a mode that the 1st welding part 61 and the 2nd welding part 62 were completed, and both welding and the cutting device 40 began to retract | retreat. FIG. 2 shows a state in which a temporary sealing band 60a to be a sealing band 60 is formed, (a) is a schematic plan view showing a state in which both welding and cutting devices 40 are moving forward, and (b) is a diagram showing both welding and Schematic plan view showing a state in which the cutting device 40 abuts to form the first welded portion 61, the second welded portion 62, and the cutout portion 63, and FIG. FIG. 4 is a schematic plan view of a state in which the cutting device 40 moves backward. It is a side view of the bandage forming apparatus 100 according to the present invention. 2 is a plan view of the envelope forming apparatus 100. FIG. FIG. 2 is a front view of the envelope forming apparatus 100. 3 is a partially enlarged side view of a container presser device 30 constituting the envelope forming apparatus 100. FIG. The both welding and cutting device 40 which comprises the same band forming apparatus 100 are shown, (a) is a partial top view, (b) is a partial front view. The technique shown by patent document 2 is shown, (a) is a partially broken front view, (b) is a perspective view.

 Next, the invention according to each claim configured as described above will be described with respect to the sealing band forming apparatus 100 and the packaging container 200 which are the best modes shown in the drawings. Since the sealing band forming method of 1 to 4 is substantially included, a direct description of the sealing band forming method will be omitted by describing the sealing band forming apparatus 100.

  FIG. 1 shows a packaging container 200 according to this embodiment. As shown in FIG. 1B, the packaging container 200 is formed by a sealing band 60 that is heat-shrinked around a boundary portion 230 between the main body 210 and the lid body 220 constituting the packaging container 200. The main body 210 after the contents are stored and only the side surface of the lid body 220 fitted to the main body 210 are sealed, and this sealing band 60 enhances the sealing performance. Therefore, the fitting between the main body 210 and the lid body 220 constituting the packaging container 200 may be “external fitting” or “internal fitting” conventionally performed, or simply the main body 210. In other words, it may be possible to perform the fitting simply by bringing the “flange” formed on the lid 220 into contact with each other.

  The packaging container 200 is mainly used to pack products sold at supermarkets and convenience stores such as lunch boxes and prepared dishes. Since it is of a size that can be taken home, its height is about 2 to 10 cm. That is, the height of the packaging container 200 in which the lid body 220 is fitted to the main body 210 is such that it can be grasped by a human hand. On the other hand, the boundary portion 230 between the main body 210 and the lid body 220 is, for example, in FIG. As shown to (a), it protrudes a little by the flange etc.

  The sealing band 60 formed only on the side surface of the main body 210 and the lid body 220 centering on the boundary portion 230 is a temporary sealing band 60a formed by welding the long heat-shrinkable films 64 to each other. It is formed by heat shrinking. The heat-shrinkable film 64 used in the present embodiment has a width of 1 to 10 cm and a thickness of 10 to 50 μm.

 The enveloping band 60 formed of the above heat-shrinkable film 64 is not more than the length, and the width is at most equal to or less than the height of the side surface of the packaging container 200 as shown in FIG. Yes, it is not as significant as the conventional one shown in FIG. That is, the enveloping band 60 is obtained by thermally shrinking the temporary enveloping band 60a formed by winding the heat-shrinkable film 64 around the boundary portion 230, but even at the stage of the temporary enveloping band 60a. The width of the temporary sealing band 60a is equal to or less than the height of the side surface of the packaging container 200. In other words, the heat-shrinkable film 64 used for sealing the packaging container 200 has a width of 1/3 or less compared to the conventional film used in FIG. Thus, the packaging container 200 can be sealed at a low cost.

  Further, since the sealing band 60 is present around the boundary portion 230 having high rigidity, even if the sealing band 60 is formed by heat-shrinking the temporary sealing band 60a, the main body 210 and the lid body are formed. 220 is not deformed. This is because the sealing band 60 is formed only on the side surface of the main body 210 and the lid body 220 fitted to the main body 210 even in the state of the temporary sealing band 60a of the previous stage. This is because heat shrinkage force is not applied to the upper surface (top plate surface) of the body 220, and it does not become a source of force that deforms the main body 210 or the lid body 220.

  Further, since the sealing band 60 is present around the boundary portion 230 having high rigidity, the sealing band 60 can be easily separated and removed, and as a result, the packaging container 200 is opened. Can be easily done. This is because the band 60 has its upper or lower edge centered on the boundary portion 230, so that the portion to be broken or cut can be clearly seen. As shown in FIG. 19A and FIG. 19A, the upper edge or the lower edge of the heat-shrinkable bag 60 is completely a packaging container. This is because it is not in close contact with the side surface of 200 and is slightly apart.

 In particular, the sealing band 60 of the present embodiment has two heat-shrinkable films 64 welded to each other at the first welding part 61 and the second welding part 62 to form a temporary sealing band 60a. Since it is formed by heat shrinkage, as shown in FIGS. 1A and 1B, the first welded portion 61 and the second welded portion 62 clearly remain. Further, as shown in FIGS. 13A to 13C, the first welding portion 61 and the second welding portion 62 are provided with a wide front welding head 43 a and a rear welding head of each container pressing device 30. Since it is formed by welding with 43b, it is present in the bandage 60 as being slightly cloudy and visible. For this reason, the removal of the band 60 when the packaging container 200 is opened can be easily performed by using the first welded portion 61 or the second welded portion 62 as a broken portion.

  Now, the sealing band 60 closing the boundary portion 230 of the packaging container 200 described above is as shown in FIGS. 6 to 13 by the sealing band forming apparatus 100 according to the present embodiment shown in FIGS. Formed. First, the sealing band forming apparatus 100 is configured such that, as shown in FIGS. 14 to 18, the sealing band forming apparatus 100 puts the contents at the starting point on the conveyor belt 10 supported horizontally with respect to the machine frame. The packaging container 200 in a state where the lid body 220 is fitted to the packed main body 210 is placed, and the packaging container 200 is transported and stopped by the transport belt 10 toward the heating device 50 in the final stage. By feeding, the bandage 60 is sequentially formed on the side surface of the packaging container 200 around the boundary portion 230.

  For this purpose, the sealing band forming device 100 is configured such that the film guide device 20, the container pressing device 30, the welding and cutting device 40, and the heating device 50 are sequentially arranged toward the upstream side of the transport belt 10.

 The film guiding apparatus 20 for carrying out the forming method of claim 1 is arranged on the upper part of the conveying belt 10 until the packaging container 200 is sent downstream from the heat shrinkable film 64 by the conveying belt 10. On the other hand, when the packaging container 200 is sent downstream from the heat shrink film 64, it is lowered.

  In addition, as shown in FIGS. 2 to 5, the film guide device 20 that implements the forming method according to claim 1 is configured so that the film rolls 64 a and 64 b around which the heat-shrinkable film 64 is wound, The heat-shrinkable film 64 can be fed out in order from these film rolls 64a and 64b. Of course, this film guide device 20 has a predetermined number of guide rollers 21, and these guide rollers 21 move relative to the conveyor belt 10 while detecting the tension of each heat-shrinkable film 64. Therefore, when an excessive tension is applied to each heat-shrinkable film 64, the entire sealing band forming apparatus 100 or the conveyance of the conveyance belt 10 can be stopped.

 On the other hand, the film guide device 20 for carrying out the forming method of claim 2 is located at a predetermined position of the transport belt 10 with almost no up and down movement.

  Further, as shown in FIGS. 6 to 12 and 15, the film guiding apparatus 20 for carrying out the forming method of claim 1 is provided with the respective film rolls 64 a and 64 b wound with the heat-shrinkable film 64 described above. Are arranged on the left and right sides of the conveyor belt 10, and the heat-shrinkable film 64 can be fed out from these film rolls 64a and 64b in order. Of course, this film guide device 20 has a predetermined number of guide rollers 21, and these guide rollers 21 move relative to the conveyor belt 10 while detecting the tension of each heat-shrinkable film 64. Therefore, when an excessive tension is applied to each heat-shrinkable film 64, the entire sealing band forming apparatus 100 or the conveyance of the conveyance belt 10 can be stopped.

  In the sealing band forming apparatus 100 according to this best mode, the guide rollers 21 of each film guide apparatus 20 can be advanced and retracted, and the left and right welding and cutting apparatuses 40 and 40, which will be described later, advance and retract each other. Before starting, the heat shrinkable films 64 and 64 can be moved toward the center of the conveyor belt 10. Of course, the heat shrink films 64 and 64 may be aligned and aligned only by the left and right welding and the forward and backward movement of the cutting devices 40 and 40.

 In other words, in the sealing band forming apparatus 100 of the best mode, before the left and right welding and cutting apparatuses 40 and 40 advance and retract from each other, each guide roller 21 is attached to the center portion of the belt 10 of both heat-shrinkable films 64. The two heat-shrinkable films 64 can be aligned by the welding and cutting apparatus 40 that are performed thereafter without applying unnecessary tension, and are indicated by virtual lines in FIG. As described above, the rear side surface of the packaging container 200 is wrapped with the heat shrink films 64 and 64 without difficulty.

 As shown in FIG. 10, FIG. 11 and FIG. 16, the container holding device 30 fixes the packaging container 200 that has come to a predetermined position on the conveyor belt 10, and as shown in FIG. It is provided so as to be movable up and down with respect to the machine frame of the band forming apparatus 100. Of course, when the packaging container 200 comes to a predetermined position, it goes without saying that the conveying belt 10 is stopped by a signal from a limit switch (not shown) or the like.

  As shown in FIG. 17, the container pressing device 30 of this embodiment is provided with a plurality of pressing pads 31, 31 at the tip of the support beam 32, and the support beam 32 is moved up and down by the drive cylinder 33. Thus, the packaging container 200 can be pressed and retracted from the packaging container 200 by the respective pressing pads 31.

 As shown in FIGS. 6 to 12, a pair of left and right welding and cutting devices 40 are provided on the left and right sides slightly upstream of the container holding device 30 described above so as to freely advance and retract toward the center line of the conveyor belt 10. is there. Each welding and cutting device 40 literally welds and cuts the heat-shrinkable film 64 drawn between them as shown in FIGS. 13A to 13C.

 As shown in FIG. 18, each welding and cutting device 40 of the present embodiment has a movable table 41 that is movably provided on the machine frame of the sealing band forming device 100. 41, the guide roller 42 that guides each heat-shrinkable film 64, and the front and rear of each heat-shrinkable film 64 that are arranged side by side with a space before and after the conveying belt 10 in the carrying direction. Welding heads 43a and 43b are provided.

  As for one of the welding and cutting devices 40, as shown on the right side of FIG. 18 (a), both welding heads 43a and 43b are provided so as to be able to advance and retreat with respect to the movable table 41, and these welding heads. Between 43a and 43b, a cutting blade 44 whose tip is directed to the other welding (left side in the drawing) and the space of the cutting device 40 is provided. Both welding heads 43a and 43b provided to be movable relative to the moving table 41 retreat into the moving table 41 when the other welding heads 43a and 43b of the other welding and cutting device 40 are pressed against each other. When the pressing force disappears, the spring 55 interposed between the movable table 41 returns to the original position.

  Further, as shown in FIG. 18B, the guide roller 42 provided in each welding and cutting device 40 is supported by the movable table 41 in a state where it is exposed at the downstream portion of each welding and cutting device 40. As shown in FIG. 18A, the heat-shrinkable films 64 drawn from the left and right film guide devices 20 are supported and guided on the surface.

  And it is the heating apparatus 50. As shown in FIG.14 and FIG.15, this heating apparatus 50 is installed in the rear-end part of the conveyance belt 10, and the temporary sealing band formed in the front stage from this 60a is heat-shrinked to form a bandage 60. In this embodiment, the hot air generator 51 is employ | adopted as a heat source, The hot air from this hot air generator 51 is sprayed on the temporary sealing strip 60a, and this is heat-shrinked.

 In particular, in the heating device 50 of the present embodiment, as shown in FIG. 14, the method of applying hot air from the hot air generator 51 is changed between the front stage and the rear stage, and the contraction differs between the front stage contraction and the rear stage contraction. Is to be made.

  First, in the pre-stage contraction, hot air is blown up and down on both sides of the packaging container 200 transported by the transport belt 10, and the temporary sealing band 60a that has wrapped the boundary portion 230 of the packaging container 200 in a "loose" state is removed. The slack is removed by slightly shrinking. Since the temporary sealing strip 60a that has lost its looseness is not displaced with respect to the boundary portion 230 of the packaging container 200, the temporary sealing strip 60a in the semi-contracted state is positioned relative to the packaging container 200 as a result. is there.

  In the subsequent post-shrinkage, hot air can be blown from the left and right sides and the upper side of the packaging container 200 with a larger air volume than in the pre-shrinkage while the packaging container 200 is being transported at a slower speed than in the previous pre-shrink. Thus, the temporary sealing band 60a is completely contracted.

 Since the bandage forming apparatus 100 according to the present invention forms the bandage 60 that seals the boundary portion 230 of the packaging container 200 at low cost and easily, for example, in a lunch box manufacturing factory, a backyard such as a supermarket, etc. Work will be significantly improved, work safety will be increased and energy consumption will be reduced. For this reason, productivity and productivity can be expected for bento and prepared food factories and supermarkets.

  In addition, the sealing band 60 formed as described above sufficiently seals the packaging container 200 in which the lid body 220 is fitted to the main body 210, and conversely, the boundary between the main body 210 and the lid body 220. The structure in the portion 230 will be simplified. That is, the productivity of the manufacturer of the packaging container 200 can be improved and the development can be expected.

DESCRIPTION OF SYMBOLS 100 Sealing band forming apparatus 10 Conveying belt 20 Film guide apparatus 21 Guide roller 30 Container pressing apparatus 40 Welding and cutting apparatus 41 Moving stand 42 Guide roller 43a Front welding head 43b Rear welding head 44 Cutting blade 45 Spring 50 Heating apparatus 51 Hot air generating apparatus 60 Sealing band 60a Temporary sealing band 61 First welding part 62 Second welding 63 Cutting part 64 Heat-shrinkable films 64a and 64b Film roll 200 Packaging container 210 Main body 220 Lid 230 Boundary part

Claims (8)

A method of transporting a packaging container in which a lid is fitted to a main body after storing contents to a heating device by a transport belt, and sealing with a bandage around a boundary portion between the main body and the lid Because
While allowing the heat-shrinkable film to be the sealing band to be sequentially fed out by the film guide devices disposed on the left and right sides of the transport belt, the front end portion of the heat-shrinkable film is connected by the second welding portion,
When the packaging container is transported to a place beyond the heat-shrinkable film by a transport belt, the transport belt is stopped and the container pressing device disposed above the transport belt is lowered to transport the packaging container. Press on the belt and fix it,
After the welding and cutting device arranged on the left and right sides of the transport belt and upstream of the heat shrink film is moved to the downstream side in the vicinity of the left and right sides of the packaging container, By moving the cutting device back and forth with each other, wrapping all sides of the boundary portion by both heat shrink films, forming the first and second welded portions to both heat shrink films, and forming a cut portion between them , Forming a temporary envelope wrapped around the boundary of the packaging container,
Next, the container holding device is raised to release the fixing of the packaging container, and then the transport belt is driven again to transport the packaging container into the heating device, and the temporary sealing band is removed by the heating device. A sealing band forming method for a packaging container, wherein the sealing band is formed by heat shrinking to perform sealing with the boundary portion of the packaging container as a center. A method of transporting a packaging container in which a lid is fitted to a main body after storing contents to a heating device by a transport belt, and sealing with a bandage around a boundary portion between the main body and the lid Because
While allowing the heat-shrinkable film to be the sealing band to be sequentially fed out by the film guide devices disposed on the left and right sides of the transport belt, the front end portion of the heat-shrinkable film is connected by the second welding portion,
When the wearing container conveyed by the conveying belt is positioned in front of the heat shrink film, the container pressing device disposed above is lowered and the packaging container is pressed and fixed onto the conveying belt, and the conveying belt is left as it is. The front side of the packaging container to wrap the front side surface and the left and right side surfaces of the boundary portion by heat shrink films on the left and right sides connected to each other by the second welded portion,
Next, with respect to the packaging container fixed on the transport belt by stopping the conveyor belt, the welding and cutting devices on both the left and right sides of the packaging container are advanced and retracted to each other so that the boundary portion by the two heat shrink films is removed. Wrapping the back side, forming the first and second welds for both heat shrink films, and forming a cut between them, forming a temporary sealing band that wraps all sides of the boundary part,
Further, after raising the container holding device to release the fixing of the packaging container, the transport belt is re-driven to transport the packaging container into the heating device, and the temporary sealing band is heated by the heating device. A sealing band forming method for a packaging container, wherein the sealing band is sealed to form a seal around the boundary portion of the packaging container.  For the packaging container fixed on the conveyance belt, before the welding and cutting devices on both the left and right sides are advanced and retracted from each other, the guide rollers of the film guiding devices are advanced to each other, thereby The sealing of the packaging container according to claim 1 or 2, characterized in that the packaging of the packaging container according to claim 1 or 2 is performed by assisting the wrapping on the side surface of the packaging container by the two heat shrink films. Band forming method. Heat shrinkage in the heating device of the temporary sealing band,
Pre-shrinkage for incomplete shrinkage of the temporary sealing band for the positioning adhesion of the temporary sealing band to the packaging container by blowing hot air on the upper and lower sides of the packaging container conveyed by the conveyor belt;
Subsequent shrinkage that completely shrinks the temporary sealing band by blowing hot air from the left and right sides and the upper side of the packaging container with a larger air volume than at the previous stage shrinkage while transporting the packaging container at a slower speed than at the previous stage shrinkage. The method for forming a sealing band of a packaging container according to any one of claims 1 to 3, wherein the method is performed separately. Only for the side surface of the packaging container consisting of a main body and a lid, a sealing band forming device for forming a bandage consisting of a heat-shrinkable film around the boundary between the main body and the lid,
A conveying belt that is horizontally supported by the machine frame and conveys the packaging container from at least the starting point toward the heating device;
A film guide device that is arranged on both the left and right sides of the conveyor belt and feeds out both heat-shrinkable films, each end of which is connected by a second welding portion, toward the packaging container;
A container holding device that descends onto the packaging container and temporarily fixes the packaging container on the conveyor belt;
Advancing and retreating around the packaging container fixed by the container pressing device, the heat-shrinkable film is sent out to the side surface of the packaging container, and the second portion is brought into contact with each other by overlapping each other. A pair of left and right welding and cutting devices that return to their original positions after forming a temporary sealing band by forming a welded portion, a first welded portion, and a cut portion;
A sealing band forming apparatus comprising: a heating container that heat-shrinks the temporary sealing band to form a sealing band when the packaging container constituting the temporary sealing band is conveyed by a conveyance belt .  The film guide device is provided with guide rollers for advancing and retreating toward the center of the conveyor belt and guiding each heat-shrinkable film, and these guide rollers are moved before and after the welding and cutting devices on both the left and right sides advance and retract from each other. These guide rollers can move the heat shrink films toward the center of the conveyor belt and assist the wrapping of the heat shrink films on the side of the packaging container. The sealing band forming apparatus according to claim 5, wherein A moving table that supports each of the welding and cutting devices movably with respect to the machine frame; a guide roller that is provided in a downstream portion of the moving table and guides each heat-shrinkable film; It is assumed that a space is provided before and after the conveying direction of the conveying belt, and a welding head before and after performing welding of each heat-shrinkable film,
For one welding and cutting device, both the welding heads can move forward and backward with respect to the moving table, and are arranged between these welding heads and attached to the moving table, and the tip is the other welding and cutting The sealing band forming apparatus according to claim 5 or 6, further comprising a cutting blade that faces the space of the apparatus. Heat shrinkage in the heating device of the temporary sealing band,
Pre-shrinkage for incomplete shrinkage of the temporary sealing band for the positioning adhesion of the temporary sealing band to the packaging container by blowing hot air on the upper and lower sides of the packaging container conveyed by the conveyor belt;
Subsequent shrinkage that completely shrinks the temporary sealing band by blowing hot air from the left and right sides and the upper side of the packaging container with a larger air volume than at the previous stage shrinkage while transporting the packaging container at a slower speed than the former stage shrinkage. The sealing band forming apparatus according to any one of claims 5 to 7, wherein the sealing band forming device is performed separately.

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