JP2010254306A - Sealing device and sealing method for ptp sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device for a PTP sheet which is capable of suppressing deposition of a content on a cover film. <P>SOLUTION: The sealing device includes conveying means for conveying a packaging film 11 while filling a content N in a pocket 15 formed in the packaging film 11, a seal roller 6 having a recess 19 capable of storing the pocket 15 and rotatably provided on the downstream side of the conveying means, and a heat roller 7 for joining a cover film 9 fed to the seal roller 6 so as to be brought into contact with the packaging film 11 on the seal roller 6 with the packaging film 11. The cover film 9 is fed so that the angle of incidence to the tangential line of the seal roller 6 may be 45° or less. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sealing device and a sealing method for a PTP sheet filled with capsules, tablets, and the like.

  PTP sheet (press-through pack sheet) is to be filled with contents such as capsules and tablets in a pocket formed in a belt-shaped packaging film, and then a cover film such as aluminum foil is sealed on the back surface of the packaging film Manufactured by. As an apparatus for producing this PTP sheet, a seal roll and a heat roller are provided, a packaging film, a cover film and a capsule are supplied between these rollers, and the packaging film and the cover film sandwiched between the capsules are heated to heat. Devices for sealing are known. (See Patent Document 1) Further, as a PTP sheet sealing device of the same type, there is known a device having a plurality of recesses on the outer peripheral surface of a roller so that the contents can be stably received. (See Patent Documents 2 and 3)

  FIG. 7 shows a configuration of a sealing device of a portion for performing sealing in the PTP sheet manufacturing apparatus described in Patent Document 1. The sealing device includes a sealing roller 100 and a heat roller 110, and a packaging film 120 formed in a continuous sheet shape is conveyed to the sealing roller 100.

  The packaging film 120 is formed of a thermoplastic resin such as vinyl chloride resin, and pockets 121 are formed at predetermined intervals on the upstream side of the seal roller 100, and each pocket 121 is filled with a content N such as a capsule. The packaging film 120 is conveyed to the seal roller 100 in a state where the contents N are filled.

  On the outer surface of the seal roller 100, a recess 101 for accommodating the pocket 121 is formed as shown in FIG. As shown in FIG. 8, a plurality of these recesses 101 are formed in alignment on the outer surface of the seal roller 100, and each recess 101 has a row of pockets 121 formed in the width direction of the packaging film 120. It is designed to be accommodated. The seal roller 100 rotates while accommodating the pocket 121 to move the packaging film 120 in the rotation direction.

  The heat roller 110 is composed of a heat roller with a built-in heater, and is rotated following the rotation of the seal roller 100 while being in contact with the outer surface of the seal roller 100. On the other hand, a cover film 150 made of a resin-coated aluminum film or the like is supplied to the seal roller 100 and is superimposed on the packaging film 120 on the heat roller 110. The heat roller 110 sandwiches the overlapping packaging film 120 and cover film 150 between the seal roller 100 and heats them. By this heating, the cover film 150 is bonded to the packaging film 120 and heat sealing is performed. By joining the cover film 150, the pocket 121 is sealed to form a PTP sheet, and then cut into an appropriate size and carried out to a subsequent process such as packaging.

  Incidentally, FIG. 10 shows an example of a cover film supply device for supplying the cover film 150 to the sealing roller 100 described above. In the cover film supply apparatus of this example, the cover film 150 forms a roll body 160 by being wound around a core roll 161, and is drawn out from the roll body 160 and supplied to the seal roller 100. The core roll 161 is configured to rotate in accordance with the withdrawal of the cover film 150, and a brake drum 170 is attached to the rotation shaft 162. A tension belt 180 is wound around the outer periphery of the brake drum 170 so that the brake drum 170 can be braked by the tension belt 180.

  One end of the tension belt 180 is fixed to the bracket 191 of the apparatus main body 190, and an adjustment screw 200 is connected to the other end. The adjustment screw 200 is attached to the apparatus main body 190 so as to be vertically adjustable. The adjustment screw 200 is adapted to absorb vibration by a coil spring 210. In such a structure, by rotating the adjustment screw 200 and changing the vertical position of the adjustment screw 200, the contact pressure to the brake drum 170 by the tension belt 180 can be adjusted, so that the rotation of the brake drum 170 is braked. When the cover film 150 is supplied from the roll body 160, the tension of the cover film 150 is adjusted so that the cover film 150 does not loosen.

JP 2006-335465 A JP 2005-82211 A Japanese Patent Laid-Open No. 2004-99083

  The above-described conventional PTP sheet manufacturing apparatus has a problem in that when the cover film 150 is sealed, the contents N such as capsules adhere to the cover film 150 and a defective product is generated. As a result of intensive studies on the adhesion mechanism of the contents N by the present inventors, the cause of the adhesion could be identified, and will be described below with reference to FIG.

  In recent PTP sheet manufacturing apparatuses, mass production is required, so that the supply speed of the packaging film 120 is increased to improve the production speed. In this case, the packaging film 120 is attached to the outer surface of the heat roller 110. 7A, the content N rises due to vibration, centrifugal force, etc., and a part thereof tends to slightly protrude from the pocket 121, as shown in FIG. The content N partially protruding from the pocket 121 in this way comes into contact with the resin coating surface of the cover film 150, and in this contact state, comes into contact with the heat roller 110 as shown in FIGS. 7B and 7C. . By this contact, the contents N are heated by the heat roller 110 together with the cover film 150. For this reason, a phenomenon occurs in which the content N partially melts and adheres to the cover film 150, and is stored in the pocket 121 in this attached state. That is, the PTP sheet is manufactured with the content N attached to the cover film 150. If such contents N adhere to the cover film 150, a defective PTP sheet is formed, which is not preferable.

Further, the conventional PTP sheet manufacturing apparatus has a problem that wrinkles and cuts are generated in the cover film 150. When the present inventors diligently investigated the cause of wrinkles and cuts in the cover film 150, these wrinkles and cuts were subjected to tension adjustment using the tension belt 180 having the configuration shown in FIG. However, it has been found that the vibration of the cover film 150 is caused by the occurrence of minute vibrations (hereinafter chatter vibration). This phenomenon will be described below.
FIG. 11 shows fluctuations in the tension of the cover film 150 drawn from the roll body 160, the horizontal axis shows the winding diameter of the roll body 160, and the vertical axis shows the tension of the cover film 150. The tension of the cover film 150 gradually increases as the roll diameter of the roll body 160 decreases, but chatter vibration occurs intermittently. Even when the tension of the tension belt 180 is adjusted to give a constant braking force to the brake drum 170, the chatter vibration causes the roll film 160 to cover the roll body 160 when the cover film 150 decreases as the production continues. As the body 160 becomes smaller, the necessary braking force changes accordingly. As a result, the tension of the cover film 150 fluctuates, and vibration or the like according to the tension fluctuation acts. It seems to occur. When such chatter vibrations exceed the wrinkle limit tension shown in FIG.

  FIG. 9 shows variations 155 such as wrinkles and cuts generated in the cover film 150 of the manufactured PTP sheet. This variation 155 occurs along the horizontal direction in FIG. 9 (the length direction of the cover film 150 used during heat sealing of the PTP seal) with the pocket 121 as the center. If such a mutation 155 occurs, a sealing failure occurs, which results in a defective PTP sheet, which is not preferable.

The present invention has been made in view of such problems, and provides a sealing device and a sealing method for a PTP sheet capable of suppressing the contents such as capsules from adhering to the cover film. For the purpose.
Another object of the present invention is to provide a PTP sheet sealing device and a sealing method capable of suppressing the occurrence of variations such as wrinkles and cuts in the cover film of the PTP sheet.

  The sealing device for a PTP sheet of the present invention has a conveying means for conveying a packaging film while filling the pockets formed in the packaging film, and a recess that can accommodate the pocket, and is downstream of the conveying means. And a heat roller that joins the cover film supplied to the seal roller so as to come into contact with the packaging film on the seal roller, the cover film, It is characterized in that it can be supplied so that the incident angle with respect to the tangent to the seal roller is 45 ° or less.

  The present invention is the above-described sealing device for a PTP sheet, wherein the roll body around which the cover film is wound and the ultra-high contact with the rotating shaft of the roll body directly or indirectly with contact pressure. A brake member made of molecular resin and a pressurizing member capable of adjusting a contact pressure of the brake member to the rotation shaft in order to keep the tension of the cover film constant.

  The present invention is the sealing device for the PTP sheet as described above, wherein a protective plate for preventing the contents from popping out from the pocket is disposed so as to cover the sealing roller, and the cover film includes the protective film It is supplied at an incident angle that does not interfere with the plate.

  In the present invention, the packaging film is supplied to the upper surface side of the sealing roller described above, and the cover film is joined to the packaging film by the heat roller on the upper surface side of the sealing roller, and the heating is performed along the entrance path of the packaging film. A control roller for restricting the incident angle of the cover film is provided on the front side of the roller.

  According to the sealing method of the PTP sheet of the present invention, after filling the contents formed in the pocket formed in the packaging film, the packaging film is moved with the rotation of the sealing roller while the pocket is accommodated in the recess of the sealing roller, and the sealing roller In the sealing method in which the cover film is supplied to the sealing film, the cover film and the packaging film are brought into contact with each other on the seal roller, and the cover film is joined to the packaging film by heating, the cover film is 45 ° or less with respect to the tangent line of the seal roller It supplies with the incident angle of.

  According to the sealing device of the PTP sheet of the present invention, the incident angle of the cover film with respect to the tangent to the sealing roller is 45 ° or less, so that the contents are not pocketed even if the contents are about to come out of the packaging film pocket. The cover film suppresses the action of getting out of the camera. As a result, the contents are contained in the pocket, and the contents are less likely to come into contact with the seal roller, and the heat of the seal roller does not act on the contents. For this reason, it can suppress that the contents melt and adhere to the cover film.

  Moreover, according to the sealing device of the PTP sheet of the present invention, the brake member that contacts the rotating shaft of the roll body is formed of the ultra high molecular resin, and thus has excellent sliding characteristics. For this reason, it can rotate in the state in which the rotating shaft of the roll body was smoothly braked, and when the cover film is pulled out, it is possible to suppress the occurrence of fluctuations in tension due to chatter vibration of the cover film. For this reason, it can suppress that variation | mutation, such as a wrinkle and a cut | interruption, generate | occur | produces in a cover film.

  In addition, according to the PTP sheet sealing device of the present invention, the cover film is supplied at an incident angle that does not interfere with the protective plate, so that the cover film can be smoothly supplied to the sealing roller, and the protective plate includes the contents. Prevents popping out.

  According to the sealing method of the PTP sheet of the present invention, since the cover film is supplied at an incident angle of 45 ° or less with respect to the tangent line of the sealing roller, the cover film can suppress the action of the contents coming out of the pocket. Therefore, the contents are not in contact with the heat roller in a state of being accommodated in the pocket, and the contents can be prevented from melting and adhering to the cover film due to the heat of the heat roller.

It is a side view which shows the whole manufacturing apparatus of a PTP sheet. It is sectional drawing of a sealing device. It is sectional drawing in which the incident angle of a cover film is 45 degrees. It is sectional drawing in which the incident angle of a cover film is 35 degrees. It is sectional drawing in the incident angle of a cover film in 20 degrees. It is a perspective view which shows a cover film supply apparatus. (A)-(d) is a side view which shows the operation | movement in the conventional sealing device. It is a perspective view which shows a seal roller. It is a front view which shows the variation | mutation which generate | occur | produced in the cover film. It is a perspective view which shows the conventional cover film supply apparatus. It is a characteristic view which shows the fluctuation | variation of the tension | tensile_strength of the cover film in the past.

Hereinafter, a PTP sheet sealing device according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an entire manufacturing apparatus including a PTP sheet sealing device, FIG. 2 is a cross-sectional view of a principal part of the PTP sealing device, and FIGS. Sectional drawing which shows the operation | movement according to FIG. 6, FIG. 6 is a perspective view which shows a cover film supply apparatus system.

  As shown in FIG. 1, the PTP sheet manufacturing apparatus 1 includes a pocket forming apparatus 2, a PTP sealing apparatus 3 according to the present embodiment, and a processing apparatus 4, which are provided in the conveyance path of the packaging film 11. Are arranged in order. The PTP sheet manufacturing apparatus 1 is provided with a cover film supply device 41. The packaging film 11 used here is made of a thermoplastic resin such as a vinyl chloride resin or an olefin resin, and is conveyed in a continuous sheet state.

  The pocket forming apparatus 2 includes a heating plate 12 and a forming plate 13. The heating plate 12 is heated to about 120 to 130 ° C. with the packaging film 11 supplied in sheet form. By this heating, the packaging film 11 becomes flexible and moves to the molding plate 13. The molding plate 13 includes a pair of molding dies 13 a and 13 b, and the pocket 15 is formed in the packaging film 11 by pressing the packaging film 11. The pockets 15 are formed at appropriate intervals along the length direction of the packaging film 11. Further, a plurality of pockets 15 are formed in a parallel state of five rows or the like in the width direction of the packaging film 11.

The PTP sheet sealing device 3 includes a transport means 5 for the packaging film 11, a sealing roller 6, and a heat roller 7.
The conveying means 5 is provided on the downstream side of the pocket forming apparatus 2. The conveying means 5 fills the pockets 15 of the packaging film 11 with contents N such as capsules and tablets. For this reason, a filling device 17 is arranged in the conveying means 5.

  The filling device 17 has a filling cylinder extending in the vertical direction, and is provided on the conveyance path of the packaging film 11. The filling cylinders of the filling device 17 are provided in a number corresponding to the pocket rows formed in the packaging film 11. Each of the filling cylinders is provided with a shutter (not shown), and the contents N are dropped into the pocket 15 and filled by opening the shutter.

  The seal roller 6 and the heat roller 7 are disposed on the downstream side of the transport unit 5. On the outer surface of the seal roller 6, a plurality of recesses 19 for accommodating the pockets 15 of the packaging film 11 are formed in an aligned state. The recesses 19 are aligned to correspond to the pocket rows formed in the packaging film 11 and are formed in the seal roller 6, for example, in the same structure as in FIG. 8. The seal roller 6 rotates to move the packaging film 11 in the rotation direction.

  The heat roller 7 is supported by a support shaft (not shown) so as to be pivotable up and down while being attached to the roller arm 21, and is disposed so as to contact the outer surface of the seal roller 6. The heat roller 7 is composed of a heat roller that is controlled by heating, and is driven to rotate as the seal roller 6 rotates. The heat roller 7 heat-bonds the cover film 9 to the back surface of the packaging film 11. Here, the back surface is the surface of the packaging film 11 on the side where the pockets 15 are opened.

  The cover film 9 is configured by applying a resin coating such as polyethylene on one surface of a metal film such as aluminum. The cover film 9 is supplied toward the seal roller 6 so that the resin coating layer contacts the packaging film 11 on the seal roller 6. The supplied cover film 9 comes into contact with the back surface of the packaging film 11 and is sandwiched between the heat roller 7 and the seal roller 6 together with the packaging film 11.

  The heat roller 7 is controlled to be heated to be higher than the softening temperature of the resin coating layer of the cover film 9, and the resin film is partially melted by the pressure heating of the heat roller 7, so that the cover film 9 is heated. Is bonded to the packaging film 11. In this case, when the resin coating layer is, for example, polyethylene, the heat roller 7 is controlled to be 195 ± 5 ° C. The cover film 9 and the packaging film 11 in a contact state are heated for 0.5 seconds by being supplied at a peripheral speed of 6.6 m / min, for example. Further, bonding is performed at a pressure of about 0.5 MPa.

  In the present embodiment, a protective plate 23 is provided for the seal roller 6. The protective plate 23 is disposed so as to partially cover the upper surface portion of the seal roller 6 on the side opposite to the heat roller 7 with a slight gap, and by partially covering the upper surface portion of the seal roller 6, The content N is prevented from popping out from the pocket 15 of the packaging film 11. In this embodiment, the protective plate 23 is disposed on the outer peripheral surface of the seal roller 6 so as to cover the part from the part where the packaging film 11 is drawn to the top part with a slight gap.

  In the sealing device 3 having the above structure, when the packaging film 11 reaches the sealing roller 6, the pocket 15 filled with the contents N is accommodated in the recess 19 of the sealing roller 6, and the packaging film is rotated with the rotation of the sealing roller 6. 11 moves on the seal roller 6. The cover film 9 is supplied to the seal roller 6 from above and comes into contact with the packaging film 11. The cover film 9 is sandwiched between the seal roller 6 and the heat roller 7 in this contact state, and is heated by the heat roller 7. For this reason, the cover film 9 is joined to the packaging film 11, and the pocket 15 is sealed.

  After the cover film 9 is bonded, the packaging film 11 is conveyed to the processing device 4 via a plurality of feed rollers 25. The processing device 4 has a perforation forming part 27 and a punching part 29. The perforation forming unit 27 forms a perforation on the packaging film 11 that serves as a standard for cutting. The punching part 29 cuts the packaging film 11 every predetermined length. By this cutting, a PTP sheet having a predetermined size is formed, and the formed PTP sheet is sucked by the pickup arm 30 and conveyed to a subsequent process such as packaging.

In the present embodiment, the cover film 9 is supplied at an incident angle of 45 ° C. or less with respect to the peripheral surface of the seal roller 6. Further, a control roller 33 is provided above the seal roller 6 to set the incident angle of the cover film 9 as shown in FIG. In FIG. 1, for the sake of simplicity, the cover film 9 is depicted as being introduced from about 90 ° above the seal roller 6, but in actuality, the cover film 9 is used as a control roller as shown in FIG. 33 is introduced from an oblique direction.
More specifically, as shown in FIG. 2, the control roller 33 is disposed on the upstream side (upper side) from the position where the cover film 9 is supplied to the seal roller 6. The control roller 33 is pivotally supported on, for example, a frame that supports the entire apparatus, and the installation position with respect to the seal roller 6 can be changed by adjusting the pivotal support position with respect to the frame. Thus, the incident angle of the cover film 9 with respect to the seal roller 6 can be appropriately changed.

  3 to 5 show a state in which the incident angle of the cover film 9 to the seal roller 6 is changed by changing the position of the control roller 33. The incident angle of the cover film 9 can be regarded as an elevation angle with respect to the tangent 35 of the seal roller 6 and is preferably set to an incident angle of 45 ° or less. In FIG. 3, the incident angle of the cover film 9 is 45 °, in FIG. 4, it is 35 °, and in FIG. 5, it is set to 20 °.

  Thus, by setting the incident angle to 45 ° or less, the cover film 9 covers the concave portion 19 of the seal roller 6 in a state before heat sealing, in other words, in a state immediately before contacting the heat roller 7. State. By covering the recess 19 with the cover film 9, the cover film 9 acts so as to maintain the accommodation state of the content N accommodated in the pocket 15 in the recess 19 in the pocket 15. That is, even if the contents N are about to come out of the pockets 15 of the packaging film 11, the cover film 9 suppresses the movement of the contents N out of the pockets 15. As a result, the contents N are in the pocket 15 so that the contents N do not come into contact with the heat roller 7 and the heat of the heat roller 7 does not act on the contents N. For this reason, it can prevent that the content N melt | dissolves and adheres to the cover film 9, and generation | occurrence | production of the PTP sheet defect resulting from adhesion can be prevented.

  The cover film 9 has a larger effect of pressing the contents N into the pocket 15 as the incident angle to the seal roller 6 becomes smaller, and the defect rate can be reduced. The lower limit value of the incident angle of the cover film 9 is set in relation to the protective plate 23 that covers the seal roller 6. That is, the cover film 9 is set to an incident angle that does not interfere with the protective plate 23. By setting in this way, the cover film 9 can be smoothly supplied to the seal roller 6 while supporting the pressing action of the contents N of the cover film 9. Further, since the cover film 9 does not interfere with the protective plate 23, the protective plate 23 can reliably prevent the contents N from popping out. From the above, the incident angle of the cover film 9 is preferably in the range of 20 to 45 °.

  Next, as shown in FIG. 6, the cover film supply device 41 has a roll body 43 wound around a core roll 42. The core roll 42 of the roll body 43 has a rotation shaft 45 that is rotatably supported by the apparatus main body 47, and a brake drum 51 is attached to the rotation shaft 45.

  In the present embodiment, the cover film supply device 41 is provided with a brake member 48. The brake member 48 is formed in a block shape, and a recessed portion 48 a formed on the lower surface is in contact with the outer peripheral surface of the brake drum 51. The brake member 48 is attached to the pressure member 49. An air cylinder is used as the pressurizing member 49, and the brake member 48 moves forward and backward with respect to the brake drum 51 by expanding and contracting by air from an air source (not shown). Thereby, the brake member 48 can adjust the contact pressure to the brake drum 51 and is in contact with the brake drum 51.

  In such a cover film supply device 41, the pressure member 49 is controlled to adjust the contact pressure of the brake member 48 to the brake drum 51, thereby rotating the brake drum 51, that is, the rotating shaft 45 of the roll body 43. The rotation of the cover film 9 can be efficiently braked in real time, the tension when the cover film 9 is supplied from the roll body 43 can be kept constant, and the amount of the cover film 9 pulled out can be stabilized.

  The brake member 48 is made of ultra high molecular resin. As the ultra high molecular weight resin, a polyacetal represented by a trade name “Delrin” (manufactured by DuPont) or a trade name “Duracon” (manufactured by Polyplastics) can be selected. Polyacetal has excellent sliding characteristics, and the brake drum 51 can slide well against the brake member 48 made of polyacetal. For this reason, it is possible to perform smooth braking control without vibration of the brake drum 51, that is, the rotating shaft 45. Thereby, when the cover film 9 is pulled out, it is possible to suppress the occurrence of tension variation due to chatter vibration in the tension of the cover film 9. Generation | occurrence | production can be suppressed. In addition, since these ultra high molecular weight resins have excellent wear resistance and high hardness, there is little possibility of generation of wear dust even when used during the operation of the seal device, and dust around the seal device There is little possibility to generate.

  In the present embodiment, the brake drum 51 is attached to the rotating shaft 45 of the roll body 43 and the brake member 48 is in contact with the brake drum 51, but the rotating shaft of the roll body 43 is not provided without providing the brake drum 51. The structure may be such that the brake member 48 is in direct contact with 45.

A PTP sheet was produced by changing the angle of the control roller as shown in FIG. 3, FIG. 4, and FIG.
The sealing roller (diameter: 16.33 cm) is rotated at a speed of 6.6 m / min, the sealing temperature by the heat roller is controlled to 195 ± 5 ° C., the sealing pressure is set to 0.49 MPa, and polyethylene is applied to the back surface of the aluminum foil. The capsule was sealed using a cover film formed by bonding sheets and a packaging film made of vinyl chloride resin. The aluminum foil has a width (two types of 8.6 cm and 11.1 cm) and five rows of accommodating recesses formed along the length direction. Further, the packaging film was wound around about 1/4 turn around the seal roller.
Moreover, the brake member shown in FIG. 6 is adjusted to a brake air pressure of 0.19 MPa to 0.32 MPa by an air cylinder using a super high polymer resin made of Delrin (manufactured by DuPont). The cover film tension is controlled.

  The PTP sheet was produced by adjusting the mounting position of the control roller and heat-sealing while the cover film was incident at an incident angle of 60 ° with respect to the tangent line of the seal roller. Twenty defects occurred during the heat sealing. The defective rate was about 3.4%. The temperature of each packaging film was about 120 ° C. just before entering the heat roller, and the temperature at the time of leaving the seal roller after heat sealing was 60 ° C.

On the other hand, when the position of the control roller was adjusted and heat sealing was performed while entering the cover film at an incident angle of 45 ° with respect to the tangent line of the seal roller, 588 pieces (5880 pieces in a row, total number of 5880 pieces) were obtained. During the heat sealing, no defect occurred.
Further, when the same test was performed by changing the position of the control roller and changing the incident angle to 35 ° and 20, respectively, no defect occurred during the heat sealing in either case.

By the way, in this embodiment, the incident angle of 45 ° means that the cover film is wound around the seal roller at a length of 20 mm in the area just before contacting the heat roller, and the incident angle of 35 ° is the cover film. Means a winding length of 30 mm with respect to the sealing roller, and an incident angle of 20 ° means that the cover film has a winding length of 60 mm with respect to the sealing roller. When the incident angle was 60 °, the cover film was not in contact with the seal roller in the area on the front side of the heat roller.
From the above test results, it can be seen that the incident angle of the cover film is an important factor in the occurrence of poor sealing of the PTP sheet, and it is important that the incident angle is in the range of 20 to 45 ° with respect to the tangent to the seal roller. It could be confirmed.

DESCRIPTION OF SYMBOLS 3 ... Sealing device, 5 ... Conveyance means, 6 ... Seal roller, 7 ... Heat roller, 9 ... Cover film, 11 ... Packaging film, 15 ... Pocket, 23 ... Protection plate, 33 ... Control roller, 35 ... Tangent, 43 ... Roll body, 45 ... rotating shaft, 48 ... brake member, 49 ... pressure member.

Claims (5)

A conveying means for conveying the packaging film while filling the contents formed in the pocket formed in the packaging film;
A seal roller having a recess that can be accommodated in the pocket, and provided rotatably on the downstream side of the conveying means;
A heat roller that joins the cover film supplied to the seal roller so as to come into contact with the packaging film on the seal roller;
A PTP sheet sealing apparatus, wherein the cover film can be supplied such that an incident angle with respect to a tangent to the sealing roller is 45 ° or less.   A roll body around which the cover film is wound, a brake member made of an ultra high molecular resin that has a contact pressure on the rotating shaft of the roll body and is in direct or indirect contact, and a constant tension of the cover film The sealing member for a PTP sheet according to claim 1, further comprising a pressurizing member capable of adjusting a contact pressure of the brake member to the rotating shaft.   A protective plate for preventing the contents from jumping out of the pocket is disposed so as to cover the upper surface side of the seal roller, and the cover film is supplied at an incident angle that does not interfere with the protective plate. The PTP sheet sealing device according to claim 1 or 2.   A packaging film is supplied to the upper surface side of the sealing roller, the cover film is joined to the packaging film by the heat roller on the upper surface side of the sealing roller, and the cover is disposed on the front side of the heat roller along the entry path of the packaging film. The sealing device according to claim 1, further comprising a control roller that regulates an incident angle of the film. After filling the pockets formed in the packaging film with the contents, the packaging film is moved along with the rotation of the sealing roller while the pocket is received in the recess of the sealing roller, and the cover film is supplied to the sealing roller. In the sealing method in which the cover film and the packaging film are brought into contact with each other and the cover film is bonded to the packaging film by heating.
A method for sealing a PTP sheet, wherein the cover film is supplied at an incident angle of 45 ° or less with respect to a tangent to the seal roller.

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