JP2006273337A - Film wrapping method, and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To wrap a stretch film around an article to be packaged in such a way that the a welded part of the stretch film wrapped around the article to be packaged does not project outward, and that the stretch film is welded with a sufficient strength and is wrapped around while being kept tensed over the entire width of the film. <P>SOLUTION: The article 4 to be packaged is placed on a rotating table 2, and the stretch film 30, which is kept stretched and is supplied from a film supplying apparatus 31, is wrapped around the periphery of the article 4 as the rotating table 2 rotates. The film 30 is wrapped in such a way that the wrapping start portion and the wrapping end portion overlap in a given length, and that the overlapping part of both portions are superposed from the inside/outside and are welded together vertically and linearly sidewise on at least one spot. Then, a part of the film 30 on the upstream side from the welded part is cut. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a film packaging method and apparatus for wrapping a stretch film by winding it in a full web shape around the article to be packaged transferred on the rotary table according to the rotation of the rotary table.

  In this type of film packaging method and apparatus, a rotary table provided with a conveyor for carrying in and out the packaged object, and a tip end portion of the film provided at a position off the mounting position of the packaged object on the rotary table. A chuck device for chucking the film, and a film supply device, a welding device, a film cutting device, and the like, which are arranged on the side of the rotary table and feed the stretch film to the chuck device. The stretch film is wound around the package by rotating the turntable on which the package is placed with the leading edge of the stretch film chucked by the chuck device, and then the most downstream part of the film is wrapped. The stretch film of the part wrapped around the object is welded, and the downstream side of this is chucked So that the packaging wrapping stretch film around the packaged articles by cutting at film cutting device jack state (e.g., Patent Document 1)

JP-A-7-33107

  In the conventional film wrapping apparatus, one layer of stretch film is wound around the article to be wrapped, and the back side of the stretched film is opposed to the start and end of the film, and is clipped into a knob shape. Since it is made to weld, the welded part after cutting the stretch film remains in a state where the stretch film overlaps and protrudes to the outside of the package, and the stretch film is damaged from this part. There is a problem that the protruding piece is detected by a detector in the automatic warehouse and causes a malfunction. Moreover, the aesthetic feeling after packaging was also damaged by the protruding pieces.

  Further, in the conventional film wrapping apparatus, in the chuck device for chucking the start end portion of the stretch film, the end portion of the stretch film spread in the vertical direction is pushed between the opposing fingers by the blade. The stretch film of the part is chucked in a state where it is slacked in the vertical direction, and the stretch film is wrapped around the packaged item in this state, so that it is wrapped in a state where wrinkles are generated in the vertical direction, and the effect as a stretch film is obtained. I couldn't show it.

  The present invention has been considered in view of the above, and the welded portion between the start and end portions of the stretch film wound around the packaged object does not protrude from the periphery of the packaged object and has sufficient strength. It is an object of the present invention to provide a film packaging apparatus which can be welded and can wind a stretch film in a tensioned state over the entire height of an object to be packaged.

In order to achieve the above object, a film packaging method according to the present invention places an article to be packaged on a rotary table,
According to the rotation of the turntable, a stretch film supplied in a stretched state from a film supply device provided on the side of the turntable is wound around a packaged object, a winding start end and a winding end Are wrapped over a predetermined length,
The overlapping portion of the winding start end portion and the winding end portion is overlapped from the inside and the outside thereof and welded in a row in the vertical direction, and this row welding is performed in at least one place in the lateral direction,
Thereafter, the stretch film upstream of the welded portion was cut.

  And the film packaging apparatus which concerns on invention for enforcing the said method is the stabilizer provided in the ceiling frame so that it may rotate in synchronization with this rotary table above this rotary table, and the rotary table which has a conveyor on the upper surface. And at the lateral position of the conveyor and at least one of the rotary table and the ceiling frame, the vertical standing position and the folding position along the rotary table or the ceiling frame are variable, and the crimping bar is A welding receiver provided toward the side of the conveyor, and provided on the rotary table and the ceiling frame on the side of the welding receiver and facing the vertical direction, and separated from a position close to the welding receiver. It can be moved to a position, and the upper and lower intervals at positions close to the separated positions are widened. A pair of upper and lower chuck devices that chuck the upper and lower ends of the film, and a welding device that contacts and separates from the crimping cover of the standing welding receiver on the side of the rotary table, allowing the cutter to move vertically And a cutting / cutting device that is movable in the contact / separation direction with respect to the welding receiving device of the rotary table, and a pair of upper and lower chuck devices chuck the top and bottom of the rotary table. It comprises a film supply device that feeds and supplies a stretch film while receiving a stretching action in the feed direction by rotation.

  In the film packaging apparatus, among the plurality of feed rolls constituting the film supply path of the film supply apparatus, two adjacent rolls are used as drawing rolls, and the rotational peripheral speed of the upstream drawing roll is set as the downstream drawing roll. The rotation peripheral speed was set to be a free rotating roll that freely rotates at least the upper end of at least one drawing roll.

  According to the film packaging method of the present invention, the welded portions of the start and end portions of the stretch film wound around the package can be welded with sufficient strength without protruding from the periphery of the package.

  Moreover, according to the film packaging apparatus of the present invention, the welding receiver is placed upright on the side of the packaged object on the inner side of the stretch film to be wrapped around the packaged object, and from the outside of the stretch film with respect to the crimp bar. By pressing the welding device, the stretch film wound around the package can be welded in the winding direction of the stretch film, whereby the start and end portions of the stretch film are wound between them. The layers can be welded integrally with the stretch film in the overlapping direction, and can be welded with sufficient strength at the welded portion.

  In addition, the starting end of the stretch film at the start of winding can be tensioned in the vertical direction by the chuck device, and can be wound around the packaged object in a state of being tensioned from the starting end over the entire width of the stretch film. The stretch film supplied while being stretched by the supply device can be wound in a tension state over the entire height of the package.

  Furthermore, the upstream side stretching roll of the film supply apparatus composed of a pair of stretching rolls that supply the stretch film to the rotary table side while stretching is rotated more slowly than the downstream side stretching roll, and at least the upper side of at least one stretching roll Since the end portion of the film is a free rotating roll, no stretching action is applied to at least the upper end portion of the stretched film fed from here, and this portion is not stretched. Therefore, by projecting this part, for example, to the upper side of the package, this part falls to the inside of the package, and the upper periphery of the package is covered with the stretch film, and the stretch around the package is It can prevent dust from entering the inside of the film.

  1 and 2 show the entire film packaging apparatus according to the present invention. FIG. 1 is a plan view showing the ceiling portion omitted, and FIG. 2 is a side view. In the figure, reference numeral 1 denotes a base frame, and 2 a rotary table that is rotatably mounted on the base frame 1 and is rotated by a motor 1a. The rotary table 2 is provided with a conveyor 3 including a pair of conveyor chains 3 a and 3 b with the upper side of the conveyor chains 3 a and 3 b protruding from the upper surface of the rotary table 2. The article 4 to be packaged is loaded and unloaded together with the pallet 5 on which it is placed. As an example of the package 4, the planar shape is rectangular and has a predetermined height.

  A mast 6 is erected on one side of the base frame 1 and at a position separated from the rotary table 2, and a subframe 7 is supported on the mast 6 so as to be movable up and down by a lifting device (not shown). An arm 8 is provided at the upper end of the subframe 7 so as to face the base frame 1 in the vertical direction. A ceiling frame 9 is rotatably supported on the lower side of the arm 8 and is driven to rotate by a motor 9a. The ceiling frame 9 faces the rotary table 2 and has a coaxial rotation center.

  A stabilizer 10 is provided on the lower surface of the ceiling frame 9 so as to be movable up and down by a cylinder device 11 so as to be opposed to the rotary table 2 and press the upper end of the article 4 on the rotary table 2.

  The rotary table 2 and the ceiling table 9 are provided with a pair of upper and lower welding receivers 12a and 12b and chuck devices 13a and 13b that are opposed to each other in the vertical direction. The upper and lower welding receivers 12a and 12b are provided on the side in the direction perpendicular to the conveying direction of the conveyor 3 and along the side surface of the article 4 to be packaged placed on the rotary table 2, and the chuck device 13a. , 13b are provided at positions spaced laterally from the welding receivers 12a, 12b.

  Since the welding receivers 12a, 12b are vertically symmetrical and have the same configuration, the configuration of the welding receiver 12b on the lower side will be described with reference to FIGS. 3 is a view as viewed from the direction of arrow A in FIG. 1, that is, from the center side of the rotary table 2, and FIG. 4 is an enlarged cross-sectional view along BB in FIG.

  Reference numeral 14 denotes a bracket provided on the rotary table 2, and a base end of the first arm 15 is supported on the bracket 14 so as to be rotatable from the upright state to the horizontal state and in the conveying direction of the conveyor 3. Reference numeral 16 denotes a cylinder device for rotating the cylinder device. From the posture in which the second arm 17 is aligned with the first arm 15 at the distal end of the first arm 15, the posture is in a state parallel to the first arm 15 in the direction opposite to the rotation direction of the first arm 15. The first arm 14 is connected so as to rotate about a rotation axis parallel to the rotation axis of the first arm 14.

  A first sprocket 18 is integrally fixed to the base end side of the first arm 15 on the same axis as the rotation center of the first arm 15. A second sprocket 19 is integrally fixed to the base end of the second arm 17 connected to the first arm 15 so as to be in the same axis as the center of rotation of the second arm 17. The diameter (number of teeth) of the first sprocket 18 is twice the diameter (number of teeth) of the second sprocket 19. A rotating chain 20 is wound around the sprockets 18 and 19.

  The first and second sprockets 18 and 19 may be directly fixed to the arms 15 and 17, respectively, or the arms 15 and 17 may be integrated with the sprockets 18 and 19 via the lower shaft portion. You may stick to.

  First and second crimping bars 21 a and 21 b are attached to the arms 15 and 17 in parallel with the arms 15 and 17 and toward the outside. Further, the first and second guide rollers 22a and 22b are supported so as to be freely rotatable adjacent to the crimping bars 21a and 21b in the rotation direction. The second arm 15 is provided with small-diameter separating rollers 23a and 23b at positions adjacent to the outside of the guide roller 22b and the inside of the pressure-bonding bar 22b so as to be freely rotatable. A welding receiving plate 24 using silicon sponge rubber is attached to the surfaces of the pressure bonding bars 21a and 21b.

  With such a configuration, the lower welding receiver 12b extends the cylinder device 16 in the extended (stand-up) state shown in FIG. 3, so that the first arm 15 moves from the vertical state to the horizontal state. To turn. The rotation of the first arm 15 is transmitted to the first sprocket 18, the chain 20, and the second sprocket 19 that rotate integrally with the first arm 15, and the second sprocket 19 is in a direction opposite to the first sprocket 18 and 2. It is rotated over a double rotation angle. Therefore, the second arm 17 integrated with the second sprocket 19 is rotated 180 degrees while the first arm 15 is rotated 90 degrees, and as shown by the chain line in FIG. The second arm 17 is folded in parallel with one arm 15 in a horizontal state. Then, by shortening the cylinder device 16 from this state, both the arms 15 and 17 are erected in the state shown in FIG.

  The lower welding receiver 12b and the upper welding receiver 12a configured symmetrically in the vertical direction are attached to the ceiling frame 9, and the same as the lower welding receiver 12b by the operation of the cylinder device. Perform the action. The upper and lower welding receivers 12a and 12b are operated synchronously.

  Next, the configuration of the upper and lower chuck devices 13a and 13b will be described with reference to FIGS. 1, 2, 5A, and 5B. Since the upper and lower chuck devices 13a and 13b are vertically symmetrical and have the same configuration as the welding receivers 12a and 12b, the lower chuck device 13b will be described.

  The chuck device 13b includes a guide rail 25 provided on the turntable 2, a chuck base 26 slidably coupled to the guide rail 25, a pair of chuck blades 27a and 27b mounted on the chuck base 26, a chuck It comprises a cylinder device 28 for slidingly driving the base 25.

  The guide rail 25 is inclined toward the direction away from the conveyor 3 on the upstream side in the rotation direction of the turntable 2 from a position close to the welding receiver 12b in a planar state. The guide rail 25 is supported by a spacer 29 that is inclined in the vertical direction so that the one closer to the welding receiver 12b becomes lower. The upper chuck device 13 a is supported on the ceiling frame 9 via a spacer 29.

  The chuck blades 27 a and 27 b are opened and closed by an opening / closing device (not shown) built in the chuck base 26. The chuck blades 27a and 27b can be chucked without sliding the stretch film 30 in the closed state. For this purpose, a blade edge piece having a large friction coefficient such as rubber may be attached to the blades of the chuck blades 27a and 27b.

  The pair of upper and lower chuck devices 13a and 13b chucks the stretch film 30 at a high position of the spacer 29, and moves to a lower position of the spacer 29 in that state, so that only the height of the upper and lower spacers 29 and 29 is reached. The stretch film 30 is separated in the vertical direction, and the stretch film 30 is tensioned up and down accordingly.

  In FIG. 1, 31 is a film supply apparatus which supplies the stretch film 30 while stretching. This film supply device 31 is provided behind the elevating frame 7, and a pair of stretching rolls that stretch a roll support shaft 33 that supports the film roll 32 and a stretch film 30 that is fed out of the film roll 32 by a rotational difference between both rolls. 34 and 35, and an exit roller device 36 for guiding the stretch film 30 while applying a brake to the rotary table 2 side including the chuck devices 13a and 13b. The roll support shaft 33 rotates in a state where a braking force is applied, and the film roll 32 is chucked and supported by the roll support shaft 33. The stretch film 30 is wider than the height of the package 4.

  In the pair of stretching rolls 34 and 35 in the film supply device 31, as shown in FIG. 6, one of the stretching rolls 34 on the downstream side in the supply direction of the stretch film 30 is stretched to the exit roller device 36 by the motor 37. 30 and a pair of sprockets 38a and 38b are fixed to the ends of the stretching rolls 34 and 35, respectively, and a chain wound around the sprockets 38a and 38b. At 39, the other drawing roll 35 is rotated in conjunction with one drawing roll 34. At this time, the diameter of the sprocket 38b fixed to the downstream drawing roll 34 is smaller than that on the upstream side, for example, 1/2, and the upstream drawing roll 35 is 1 in comparison with the downstream one. It is rotated at a rotation speed of / 2.

  Moreover, in this film supply apparatus 31, a part of the upper end side and the lower end side of the upstream stretching roll 35 is free rotating rolls 35a and 35b that can freely rotate with respect to other parts.

  1, FIG. 2 and FIG. 7 to FIG. 10, reference numeral 41 denotes a welding / cutting device. The welding / cutting device 41 is supported by the mast 6 so as to be rotatable in the horizontal direction, and this support frame. The bracket 43 is supported at the front end portion 42 of the bracket 43 so that the position can be adjusted in the vertical direction, the welding device 44 and the cutter device 45 provided on the bracket 43, and the cylinder device 46 that rotates the support frame 42. Yes. The welding / cutting device 41 has an “operating position” where the tip portion is opposed to the rotary table 2 side by the expansion / contraction operation of the cylinder device 46, and the tip portion is directed to the downstream side in the rotational direction of the rotary table 2. It is designed to rotate over a “storage position” that rotates in the direction of separation.

  The bracket 43 is longer than the height of the package 4 and is supported on the support frame 42 in a vertical state. The welding device 44 provided on the bracket 43 includes a support member 47 provided along the bracket 43 over the entire length in the vertical direction, and a plurality of, for example, four heaters on the side surface of the support member 47 in the vertical direction. It consists of devices 48a, 48b, 48c, 48d. Each of the heater devices 48a to 48d includes a cylinder device 49 fixed to the side surface of the support member 47 and a heater 50 coupled to the tip of the rod of the cylinder device 49.

  The surface of the heater 50 has a plate shape that is long in the vertical direction, and the entire front surface is brought to a predetermined temperature by a heater wire provided inside. Each of the heaters 50 is opposed to the crimping bars 21a and 21b of the welding receivers 12a and 12b in the extended state in a state where the welding / cutting device 41 is rotated to the “operation position”. Further, by extending and contracting the cylinder device 49 in this state, the heater 50 comes in contact with and separates from the pressure-bonding pads 21a and 21b of the welding receiving measures 12a and 12b.

  The cutter device 45 includes a rodless cylinder 51 provided on the side surface of the bracket 43 in the vertical direction, and a cutter 52 fixed to the actuator of the rodless cylinder 51. With this operation, the cutter 52 is moved over a length exceeding the total height of the article 4 to be packaged. The cutter 52 of the cutter device 45 is positioned downstream of the dressing device 44 in the direction of rotation of the welding / cutting device 41 in the “operation position” direction and closer to the bracket 43 than the heater 50.

  A brush 53 protruding from the heater 50 of the welding device 44 toward the rotary table 2 is provided between the welding device 44 and the cutting device 45 over the entire length in the height direction. Further, the guide roller 54 is provided so as to freely rotate at the most downstream portion in the rotation direction of the bracket 43 in the operation position direction of the welding / cutting device 44.

  The operation in the above configuration will be described with reference to the configuration diagrams shown in FIGS. 1 to 10 and the operation explanatory diagrams shown in FIGS.

  The turntable 2 in the standby state is in a posture in which the conveyor 3 is directed laterally with respect to the base frame 1 as shown in FIG. In this state, the article to be packaged 4 conveyed from the left side in FIG. 1 is placed on the rotary table 2 and the conveyor 3 is operated for a predetermined time to place the article to be packaged 4 on the center of rotation of the rotary table 2. (FIG. 11). At the same time, the stabilizer 10 is moved downward to hold the package 4. Note that a top sheet is hung in advance on the top surface of the article 4 at this time, if necessary.

  Prior to the packaging operation, as shown in FIG. 5A, the upper and lower chuck devices 13a and 13b are retracted so that the upper and lower chuck devices 13a and 13b are brought closer to the opposing direction by the height of the spacer 29. In addition, the chuck devices 13a and 13b are opened. Then, the stretch film 30 is pulled out to the position of the chuck devices 13a and 13b in this state, and the upper and lower ends of the leading end of the stretch film 30 are chucked by the closing operation of the chuck devices 13a and 13b (FIG. 11).

  Thereafter, the welding receivers 12a and 12b are erected, and the chuck devices 13a and 13b are moved forward to approach the package 4 (FIG. 12). As a result, the chuck devices 13a and 13b are spaced apart from each other by the inclination in the vertical direction of the spacers 29 and 29, and the stretch film 30 in this portion is tensioned in the vertical direction (FIG. 5B).

  When the turntable 2 and the ceiling frame 9 are integrally rotated from the above in the clockwise direction when viewed from above, the upper and lower welding receivers 12a and 12b and the chuck devices 13a and 13b are integrally formed together with the article 4 to be packaged. The stretch film 30 rotates and is drawn out by the chuck devices 13a and 13b, and is wound around the packaged object 4 from the outside of the standing welding receivers 12a and 12b over the entire height thereof.

  At this time, the motor 37 of the film supply device 31 is driven, and the stretch film 30 is fed out at a speed approximately equal to the drawing speed of the stretch film 30 by the rotation of the rotary table 2 so that the downstream stretching roll 34 rotates. And since the rotational speed of the upstream extending roll 35 at this time is 1/2 of the upstream extending roll 34, the stretch film 30 passes in the supply direction (uniaxial direction) while passing through both rolls 34 and 35. Stretch. The stretch film 30 is subjected to a braking force by an exit roller device 36. Therefore, the stretch film 30 wound around the package object according to the rotation of the turntable 2 is stretched (stretched) in the winding direction, and is wound in a tensioned state in the vertical direction.

  At this time, the upper part and the lower part of the upstream stretching roll 35 that performs the stretching action of the stretch film 30 in the film supply device 31 are free rotating rolls 35a and 35b. The portion guided by is not stretched. Therefore, since the upper part and the lower part of the stretch film 30 fed out from the film supply device 31 are not stretched, the portion of the stretch film 30 that is wound around the package 4 and protrudes from the upper surface is inside the upper surface of the package 4. The peripheral part of the upper surface of the article 4 to be wrapped is also film-wrapped. Further, the lower part is gently wound around the pallet 5 on which the article to be packaged 4 is placed.

  The free rotating rolls 35 a and 35 b may be provided only on the upper side of the stretching roll 35. Further, this free rotating roll may be provided on the downstream drawing roll 34 side, and may further be provided on both the upstream and downstream drawing rolls 34 and 35.

  At this time, the number of windings of the stretch film 30 is one or more times in a state where the start end and the end of the stretch film 30 are slightly overlapped, but there is a problem in the strength of the film once (one layer). Therefore, it is rotated twice to form a two-layer winding (FIG. 14).

  FIG. 14 shows the end state after two rotations (two-layer winding). Before reaching this end point, for example, when one and quarter rotations are performed as shown in FIG. 13, the chuck devices 13a and 13b are opened and stretched. The chuck of the film 30 is released and retracted. Since the opened chuck blades 27 a and 27 b are disengaged from the lower and upper sides of the stretch film 30 wound around the package 4, the chuck devices 13 a and 13 b are retracted without interfering with the stretch film 30. The retracted chuck devices 13a and 13b are left open. The front end portion of the stretch film 30 released from the chuck devices 13a and 13b is not pressed and loosened by the stretch film 30 wound outside. Moreover, the front-end | tip part (starting end part) of this stretch film 30 is opposed to the welding receivers 12a and 12b, as shown in FIG.

In the winding end state shown in FIG. 14, the welding / cutting device 41 is rotated to the “operating position”, the welding device 44 is advanced, and the heater 50 is connected to the pressure bonding bar 21a of the welding receivers 12a, 12b, three stretch film 30 comprising a film tip located between the 21b is welded superimposed linear first welding line L ₁ is formed in this portion.

Next, the heater 50 of the welding device 44 is retracted and separated from the package 4, and then the conveyor 3 is slightly advanced (FIG. 15). Thereafter, the heater 50 of the welding device 44 is advanced again and pressed against the crimping bars 21a and 21b of the welding receivers 12a and 12b. From a position which is welded previously Thus, three stretch film 30 at a position spaced apart by method of moving the conveyor 3 is welded superimposed linearly, the second weld line L ₂ is formed.

  In this state, that is, in the operation state of the welding device 44, the upstream stretch film 30 is chucked with the chuck devices 13a and 13b in the retracted state as shown in FIG. 15, and then the cutting device 45 is operated. The stretch film 30 is cut by the cutter 52. Thereafter, the welding / cutting device 41 is rotated to the “storage position” to complete the packaging operation (FIG. 16).

  Also, the welding receivers 12a and 12b are folded simultaneously with or simultaneously with this operation. The folding operation of the first and second arms 15 and 17 of the welding receivers 21a and 12b at this time is performed inside the stretch film 30 wound as described above. It is guided smoothly at 22a and 22b and performed smoothly. The two welding receivers 12a and 12b in the folded state are stored on the side of the package body 4 at positions off the top and bottom of the stretch film 30 wound around the device.

With the above operation, as shown in FIG. 16, the stretch film 30 in which the packaged object 4 is wound in two layers has the first and second ends in a state where the winding start end portion and the winding end end portion are stacked in three layers. These two welding lines L ₁ and L _{2 are} welded. The article to be packaged 4 thus packed is conveyed from the turntable 2 by the operation of the conveyor 3. In addition, even if the welding at this time is one place, it may be one place as long as the strength is sufficient.

  Moreover, in the said embodiment, although the example which provided two sets of welding receivers 12a and 12b symmetrically in the up-down direction in both the turntable 2 and the ceiling table 9 was shown, the to-be-packaged goods 4 in this standing state If the length can cover the entire height, only one of the upper and lower sides is sufficient.

It is a top view which abbreviate | omits and shows a ceiling part with this invention apparatus. It is a side view which shows this invention apparatus. It is a front view of the welding receiver seen from the A direction of FIG. It is an expanded sectional view which follows the BB line of FIG. (A), (b) is a front view which shows the structure and effect | action of a chuck | zipper apparatus. It is a partially broken figure which shows the extending | stretching roll part of a film supply apparatus. It is a side view which shows a welding / cutting apparatus. It is a front view which shows a welding / cutting apparatus. It is a top view which shows a welding / cutting apparatus. It is an expanded sectional view which follows the CC line of FIG. It is an operation explanatory view. It is an operation explanatory view. It is an operation explanatory view. It is an operation explanatory view. It is an operation explanatory view. It is an operation explanatory view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Base frame, 2 ... Turning table, 3 ... Conveyor, 3a, 3b ... Chain, 4 ... Packaged article, 5 ... Pallet, 6 ... Mast, 7 ... Sub-frame, 8 ... Arm, 9 ... Ceiling frame, 9a ... Motor, 10 ... Stabilizer, 11 ... Cylinder device, 12a, 12b ... Weld receiving device, 13a, 13b ... Chuck device, 14 ... Bracket, 15, 17 ... First / second arm, 16 ... Cylinder device, 18, 19 ... Sprocket, 20 ... Chain, 21a, 21b ... Crimp bar, 22a, 22b ... Guide roller, 23a, 23b ... Separation roller, 24 ... Weld receiving plate, 25 ... Guide rail, 26 ... Chuck base, 27a, 27b ... Chuck blade, 28 ... Cylinder device, 29 ... Spacer, 30 ... Stretch film, 31 ... Film supply device, 32 ... Film roll, 3 ... Roll support shaft, 34, 35 ... Stretching roll, 35a, 35b ... Free rotating roll, 36 ... Exit roller device, 37 ... Motor, 38a, 38b ... Sprocket, 39 ... Chain, 41 ... Welding / cutting device, 42 ... Support Frame, 43 ... Bracket, 44 ... Welding device, 45 ... Cutter device, 46 ... Cylinder device, 47 ... Support member, 48a to 48d ... Heater device, 49 ... Cylinder device, 50 ... Heater, 51 ... Rodless cylinder, 52 ... Cutter, 53 ... brush, 54 ... guide roller.

Claims (3)

Place the package on the turntable,
According to the rotation of the turntable, a stretch film supplied in a stretched state from a film supply device provided on the side of the turntable is wound around a packaged object, a winding start end and a winding end Are wrapped over a predetermined length,
The overlapping portion of the winding start end portion and the winding end portion is overlapped from the inside and the outside thereof and welded in a row in the vertical direction, and this row welding is performed in at least one place in the lateral direction,
Then cut the stretch film upstream from the welded part,
A film packaging method characterized by the above. A turntable having a conveyor on the upper surface;
A stabilizer provided on the ceiling frame so as to rotate in synchronization with the rotary table above the rotary table;
At the side of the conveyor and at least one of the rotary table and the ceiling frame, the vertical standing position and the folding position along the rotary table or the ceiling frame are variable, and the crimping bar is attached to the conveyor. A welding receiver provided to the side,
Located on the rotary table and the ceiling frame on the side of the welding receiver and facing the vertical direction, it can be moved to a position away from the position close to the welding receiver, and further closer to the position separated from the welding receiver. A pair of upper and lower chuck devices that chuck the upper and lower ends of the stretch film so that the vertical distance at the position to be widened,
A welding device that has a welding device that comes in contact with and separates from the crimping cover of the standing standing welding receiver and a cutter device that is provided so that the cutter can be moved in the vertical direction. Welding / cutting device that is movable in the direction of contact and separation with respect to
A film packaging device comprising: a film supply device that feeds and supplies a stretch film while receiving a stretching action in a feeding direction by rotation of a rotary table, with the top and bottom chucked by a pair of upper and lower chuck devices. Among the plurality of feed rolls constituting the film supply path of the film supply apparatus, two adjacent rolls are used as stretching rolls, and the rotational peripheral speed of the upstream stretching roll is slower than the rotational peripheral speed of the downstream stretching roll. The film packaging apparatus according to claim 2, wherein at least one of the stretching rolls is a freely rotating roll that freely rotates at least an upper end portion thereof.

Images