CN112278369B

CN112278369B - PTP sheet manufacturing device

Info

Publication number: CN112278369B
Application number: CN202010715698.0A
Authority: CN
Inventors: 冈部智广; 鸿谷英志
Original assignee: CKD Corp
Current assignee: CKD Corp
Priority date: 2019-07-25
Filing date: 2020-07-23
Publication date: 2022-07-01
Anticipated expiration: 2040-07-23
Also published as: CN112278369A; JP2021020682A; JP7122292B2

Abstract

The invention provides a PTP sheet manufacturing device, wherein when manufacturing PTP sheets, the device can be prevented from being enlarged, and the reduction of the productivity can be prevented. The PTP packaging machine comprises a sealing device for attaching a cover film (4) to a container film (3) filled with contents in a bag part (2). The sealing device includes: a film receiving roller (21), the film receiving roller (21) being capable of transporting the container film (3) by its own rotation; and a sealing roller (22), wherein the sealing roller (22) can be pressed against the receiving roller (21), and the two films (3, 4) are heated and pressed between the two rollers (21, 22) to be mounted. The film receiving roller (21) has a substantially octagonal prism shape having 8 film receiving faces (51) on the outer peripheral surface thereof, and a bag receiving recess (53) that can receive a bag (2) of a container film (3) is provided on each film receiving face (51). Each film receiving surface (51) has a shape with a substantially arc-shaped cross section that protrudes outward in the radial direction of the film receiving roller (21).

Description

PTP sheet manufacturing device

Technical Field

The present invention relates to a PTP sheet manufacturing apparatus for manufacturing PTP sheets that receive the contents of tablets and the like.

Background

In general, a PTP sheet that receives the contents such as a tablet is composed of a container film in which a bag portion filled with the contents is formed and a cover film attached to the container film so as to seal the opening side of the bag portion.

The PTP sheet is manufactured through, for example, a bag portion forming step of forming a bag portion while conveying a belt-shaped container film; a filling step of filling the pocket with a tablet or the like; a sealing step of attaching the cover film to the container film so as to seal the opening side of the bag portion; and a pressing step of pressing the PTP film formed by attaching the two films in a sheet unit.

Next, the PTP sheets manufactured through the above-described various steps are stacked in a collecting step, and then sent to a packaging step of pillow packaging, bundling with a tape, or the like. In the collecting step, for example, the PTP pieces are folded in a pair so that the surfaces having the pocket portions are aligned with each other, and then the PTP pieces are collected so as to be overlapped by a predetermined number of groups (for example, 5 groups and 10 pieces) each time or so as to be overlapped by a predetermined number of PTP pieces in the same direction each time.

In the sealing step, the container film and the cover film are heated and pressed, and pass between the film receiving roller that transports the container film and the sealing roller that is in pressure contact with the film receiving roller, whereby the cover film is sealed (welded) to the container film, and the bag portion is sealed.

Here, a plurality of bag receiving recesses corresponding to the bag portions of the container film is formed on the outer circumferential surface of the film receiving roller, and the container film is hung around the film receiving roller such that the bag portions of the container film are fitted into the bag receiving recesses. In this state, the container film is conveyed by the rotation of the film receiving roller so that the bag portion is hooked by the bag portion receiving concave portion.

However, in the film receiving roller 91 having a conventional cylindrical shape as shown in fig. 7 (a), for example, when the bag portion 95 of the container film 93 is designed to be large with respect to the diameter of the film receiving roller 91, there is a problem that when the container film 93 is hooked on the film receiving roller 91 with the configuration, the container film 93 is not appropriately bent along the arc shape of the outer peripheral surface of the film receiving roller 91 as shown in fig. 7 (b), and the ordinary portion of the film floats up and bends with respect to the outer peripheral surface of the film receiving roller 91.

In this state, if the sealing roller 98 is pressed, various problems occur, such as crushing of the bag portions 95, bending of the general film portions between the bag portions 95, and formation of wrinkles in the attached cover film 97. As a result, the conventional cylindrical film receiving roll has a problem that the occurrence of product defects increases.

Here, it is also conceivable to suppress the occurrence of the above-described various problems by increasing the diameter of the cylindrical film receiving roller in accordance with the increase in size of the bag portion or the like.

In view of this, in recent years, there have been also known PTP sheet manufacturing apparatuses in which a film receiving roller is of a polygonal prism shape type having a plurality of flat surfaces orthogonal to a radial direction thereof on an outer peripheral surface thereof without increasing a diameter thereof, and bag receiving recesses are provided on the respective flat surfaces (for example, see patent document 1). Thus, the container film and the cover film can be mounted in a flat state, and the occurrence of the above-described various problems can be suppressed.

Documents of the prior art

Patent literature

Patent document 1: JP 2012-20774 publication

Disclosure of Invention

Problems to be solved by the invention

In general, since the container film and the cover film are heated and pressed in the sealing step to seal (weld) them, and the inside of both films has distortion due to a difference in heat shrinkage rate or the like, the PTP sheet after being punched from the PTP film is warped (reversed warped) unless a special measure is taken.

Thus, as in patent document 1, when the container film and the cover film are attached in a flat state, the orientation and direction of the lift-up are not determined for each PTP sheet, and the shape is irregular.

For example, as shown in fig. 8, there is a problem in manufacturing PTP sheets of various shapes such as PTP sheet 101 (see fig. 8 (a)), PTP sheet 102 (see fig. 8 (b)), and PTP sheet 103 (see fig. 8 (c)) that are different in shape, in which PTP sheet 101 is tilted toward the cover film side in the sheet short side direction, PTP sheet 102 is tilted toward the container film side in the sheet long side direction, and PTP sheet 103 is tilted in the diagonal direction to cause a tilt twist.

When PTP sheets having different shapes are manufactured in this manner, the number of defective products is obviously increased, and there is a problem that it is difficult to appropriately overlap a plurality of PTP sheets in an integrating step, and the like, which causes a problem that the subsequent steps are hindered and the productivity is lowered.

On the other hand, even when PTP sheets having the same shape are stably manufactured, in the case where the PTP sheets have a shape like the

PTP sheets

101, 102, 103 described above, there is a problem that it is difficult to bring the PTP sheets into a state of being clasped between two groups.

For example, in the case where the warp occurs in the sheet longitudinal direction like the PTP sheet 102 (see fig. 8 b), the warp amount (distance from the bottom end to the top end of the general film portion in the sheet height direction) Cy tends to increase as compared with the case where the warp occurs in the sheet short direction with the same degree of curvature (see fig. 1a, 1 b, and the like).

Thus, in the bringing-together step, when two PTP sheets that are tilted in the sheet longitudinal direction are brought into a state of being clasped, there is a problem that the bag portions are difficult to engage with each other and are difficult to bring into a state of being clasped.

It is obvious that even when the warp occurs on the cover film side as in the PTP sheet 101 (see fig. 8 (a)), or even when the warp twist occurs obliquely as in the PTP sheet 103 (see fig. 8 (c)), it is difficult to bring the two PTP sheets into the wrapped state.

In addition, in the sealing step, for example, a film receiving roller of a cylindrical shape is employed, and the press layout (layout) of the sheet long side direction of the PTP sheet in the film long side direction of the PTP film is performed in the sheet press step, and in the case of manufacturing the PTP sheet tilted in the sheet long side direction, if the diameters of the film receiving rollers are the same, the amount of tilt is inevitably easily increased, as compared with the case of manufacturing the PTP sheet tilted in the sheet short side direction in the film long side direction of the PTP film in the press layout of the sheet short side direction of the PTP sheet in the sheet short side direction.

That is, in order to make the amount of lift of the PTP sheet lifted in the sheet long side direction equal to the amount of lift of the PTP sheet lifted in the sheet short side direction, there is a problem that the film receiving roller must be of a type requiring a larger diameter, and the apparatus is large in size.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a PTP sheet manufacturing apparatus capable of suppressing an increase in size of the apparatus and a decrease in productivity when manufacturing PTP sheets.

Means for solving the problems

In the following, each technical means suitable for solving the above-described problems will be described in a stepwise manner. In addition, according to needs, a special action effect is added behind the corresponding technical scheme.

Technical solution 1 relates to a PTP sheet manufacturing apparatus including:

a bag portion forming mechanism for forming a bag portion that receives the content on the band-shaped container film;

a filling mechanism for filling the bag with the content;

a sealing mechanism for attaching a band-shaped cover film to the container film filled with the content in the bag portion so as to seal the bag portion;

a cutting mechanism (including a press mechanism that presses the PTP pieces in a piece unit) that cuts PTP pieces from a belt-like PTP film to which the cover film is attached to the container film;

wherein the cutting mechanism cuts the PTP sheet from the PTP film in the following manner: a sheet longitudinal direction of the PTP sheet is along a film width direction of the PTP film, and a sheet short direction of the PTP sheet is along a film longitudinal direction of the PTP film;

the above-mentioned sealing mechanism includes:

a film receiving roller having a bag receiving recess portion capable of receiving a bag portion of the container film, the film receiving roller being capable of conveying the container film by rotation thereof while hooking the bag portion through the bag receiving recess portion;

a sealing roller for heating which can be brought into pressure contact with the film receiving roller,

a sealing mechanism for attaching the cover film to the container film by feeding the two films between the two rollers and heating and pressing the two films;

an outer peripheral surface of the film receiving roller has a substantially polygonal prism shape having a plurality of film receiving surfaces provided at predetermined intervals in a circumferential direction thereof, and the bag receiving recess is provided in each of the film receiving surfaces;

each of the film receiving surfaces has a curved surface in a cross section orthogonal to a rotation axis of the film receiving roller, and the cross section of the curved surface has a substantially circular arc shape that is convex outward in a radial direction of the film receiving roller.

In addition, the above-mentioned "substantially polygonal columnar shape" includes not only a polygonal columnar shape in which a plurality of corner portions (boundary portions of two adjacent film receiving surfaces) of the outer peripheral surface of the film receiving roller are pointed, but also a type in which the corner portions have spherical portions, and the like.

According to claim 1, the bag portion is formed on the band-shaped container film by the bag portion forming means, the contents are received in the bag portion by the filling means, and the band-shaped cover film is attached to the container film so as to close the bag portion by the sealing means.

Here, the sealing mechanism includes a film receiving roller having a bag receiving recess portion that can receive the bag, and a sealing roller for heating. The band-shaped container film and the band-shaped cover film are guided to the sealing mechanism (between the two rollers) so that the film width direction is along the rotation axis direction of the film receiving roller and so that the film longitudinal direction is along the circumferential direction of the film receiving roller, and are then heated and pressed to be mounted, thereby producing a band-shaped PTP film.

In particular, the film receiving roll according to the present invention is not a cylindrical shape as in the conventional art, but has a structure in which the outer circumferential surface thereof has a substantially polygonal column shape having a plurality of film receiving surfaces provided at predetermined intervals in the circumferential direction thereof, and each of the film receiving surfaces has a pocket receiving recess.

Further, each film receiving surface is formed with a curved surface having a substantially circular arc shape in a cross section orthogonal to the rotation axis center of the film receiving roller, the curved surface being convex toward the outer side in the radial direction of the film receiving roller.

That is, the film receiving roller is configured in such a manner that: the cross-sectional shape orthogonal to the rotation axis thereof is a substantially polygonal shape, and the radius of curvature of each receiving surface is larger than the radius of its tangent circle, that is, the maximum radius of the film receiving roller (the distance from the rotation axis to each corner of the outer circumferential surface).

In the film receiving roller according to the present invention, each film receiving surface is a curved surface having an arc shape gentler than the outer peripheral surface (film receiving surface) of the cylindrical film receiving roller having the same diameter as the above-described circumscribed circle.

Thus, the film receiving roller according to the present invention is similar to the film receiving roller described in patent document 1, and compared to the conventional cylindrical film receiving roller, it is difficult to apply an unreasonable bending stress to the bag portion of the container film and the normal film portion around the bag portion, and it is easy to appropriately wind the container film, and it is difficult to cause floating of the container film.

As a result, the film normal portion is sealed in a more flat state, and it is possible to suppress the occurrence of various defects such as crushing of the bag portion and bending of the film normal portion, and wrinkles in the attached cover film.

In addition to the above-described structure, in the present invention, the PTP sheet is cut from the PTP film in the cutting mechanism, wherein the sheet longitudinal direction of the PTP sheet is along the film width direction of the PTP film, and the sheet short side direction of the PTP sheet is along the film longitudinal direction of the PTP film.

As a result, the PTP sheet can be manufactured with the PTP sheet gently tilted on the container film side in the sheet short side direction.

Thus, according to the present invention, as compared with the structure in which the cover film is sealed in a flat state with respect to the container film as in the above-described patent document 1, it is possible to suppress the occurrence of a problem that the orientation and direction of the tilt of each PTP sheet vary and that various PTP sheets having different shapes are manufactured.

Specifically, problems of PTP sheets that are warped on the cover film side, PTP sheets that are warped on the container film side in the sheet longitudinal direction, PTP sheets that are warped on the container film side in a diagonal direction, and the like can be reduced.

As a result, the occurrence of defective products can be suppressed. Further, it is difficult for a subsequent step such as overlapping of a plurality of PTP sheets in an aggregation step (for example, a state in which PTP sheets are wrapped in a pair of PTP sheets) to cause a trouble, and it is possible to suppress a decrease in productivity.

Further, it is not necessary to use a film receiving roll having a larger diameter, and the size of the apparatus can be suppressed.

Further, in the film receiving roller having a plurality of polygonal prism shapes having a plurality of flat surfaces on the outer peripheral surface thereof, as in the film receiving roller described in patent document 1, there is a possibility that the hooked container film cannot be uniformly brought into close contact with the entire flat surface of the film receiving roller due to the rigidity of the container film, the arrangement of the bag portion, and the like, and a trouble such as partial floating is likely to occur.

In this state, when the sealing roller is pressed to seal the cover film against the container film, there is a problem that distortion is also applied, and the problems described in the above-mentioned "problem to be solved by the invention" that the orientation and direction of the warp generated in the PTP sheet cannot be predicted and the like become more significant.

In this respect, according to the film receiving roller of the present invention, since the film receiving surface is a gently curved surface having an arc shape, the container film can be prevented from floating upward and the like as compared with the film receiving roller described in patent document 1, and the container film can be sealed in a state of being more uniformly adhered to the entire film receiving surface of the film receiving roller. As a result, the occurrence of the above-described problems can be suppressed.

The PTP sheet manufacturing apparatus according to claim 2 is the PTP sheet manufacturing apparatus according to claim 1, wherein the radius of curvature of the film receiving roller is set so as to be larger than the radius (1 time of the radius) of the circumscribed circle of the film receiving roller and smaller than 3 times of the radius of the circumscribed circle.

If the radius of curvature of the film receiving surface is set to be larger than 3 times the radius of the circumscribed circle of the film receiving roller, as in the case where the radius of curvature of the film receiving surface is too large and is in a state of being closer to a flat surface, there is a problem that the trouble is liable to occur as described in the above-mentioned "problem to be solved by the invention" similarly to the film receiving roller described in the above-mentioned patent document 1.

In contrast, according to claim 2, the occurrence of the above-described problem is suppressed, and the operational effect of claim 1 is more reliably achieved.

A PTP sheet manufacturing apparatus according to claim 3 relates to claim 1 or 2, wherein the length of each of the film receiving surfaces in the circumferential direction of the film receiving roller is set to a length corresponding to 1 pitch of the sheet forming pitch of the PTP sheet in the longitudinal direction of the PTP film;

the film receiving surfaces are formed with bag receiving recesses at a plurality of positions different in position in the circumferential direction of the film receiving roller, corresponding to the bag of the PTP sheet.

According to the above-described aspect 3, since each film receiving surface of the film receiving roller is formed in the range corresponding to 1 sheet of the PTP sheet, the entire region of the PTP sheet can be sealed in 1 film receiving surface, and the operation and effect of the above-described aspect 1 and the like can be more reliably achieved with the PTP sheet being single-positioned.

Further, it is possible to reduce the problem that a trouble such as bending of a film common portion between a plurality of bag portions at different positions in at least the sheet short side direction occurs in 1 PTP sheet.

The PTP sheet manufacturing apparatus according to claim 4 is the PTP sheet manufacturing apparatus according to any one of claims 1 to 3, further including a plurality of transport rollers having bag receiving recesses capable of receiving the bag portions of the PTP films at least on a downstream side of the sealing mechanism, the plurality of transport rollers being capable of transporting the PTP films by rotation thereof while hooking the bag portions through the bag receiving recesses;

an outer peripheral surface of at least one of the plurality of transport rollers has a substantially polygonal columnar shape having a plurality of film receiving surfaces provided at predetermined intervals in a circumferential direction thereof, and the bag receiving recess is provided on each of the film receiving surfaces;

each of the film receiving surfaces has a curved surface in a cross section orthogonal to a rotation axis of the film receiving roller, and the cross section of the curved surface is substantially in the shape of an arc protruding outward in a radial direction of the transport roller.

In general, in the production process of a PTP sheet, transport rollers are provided at a plurality of locations where a PTP film is to be transported. On the outer peripheral surface of the transport roller, a plurality of bag portion receiving concave portions corresponding to bag portions of the PTP film hooked on the transport roller in such a manner that the bag portions thereof are fitted into the bag portion receiving concave portions are formed like the film receiving roller. In this state, the PTP film is conveyed by the rotation of the conveying roller by hooking the bag portion through the bag portion receiving recess.

Here, if a cylindrical transport roller having the same diameter as the radius of the circumscribed circle of the film receiving roller (the maximum radius of the film receiving roller) is used on the downstream side of the sealing mechanism, there is a problem that the amount of lift of the PTP sheet that has been completed becomes larger than an appropriate amount by applying a lift having a larger curvature to the PTP film with an appropriate lift by the sealing mechanism. Here, when the diameter of the cylindrical transport roller is increased, there is a problem that the apparatus becomes large.

On the other hand, when a polygonal film receiving roller having a plurality of flat surfaces on its outer peripheral surface is used as the transport roller on the downstream side of the sealing mechanism, as in the film receiving roller described in patent document 1, there is a problem that the lift of the PTP film applied by the sealing mechanism is corrected on the flat surfaces, and the lift amount of the completed PTP sheet is smaller than an appropriate amount.

In contrast to this, according to the above-described technical means 4, the lifting can be applied with the same curvature as that of the film receiving roller by the PTP film of the conveying roller after the lifting is applied at the sealing mechanism. As a result, a suitable state of application of the lift can be maintained, and the occurrence of the above-described problem can be suppressed. Further, the operational effects of claim 1 and the like are more reliably achieved.

The PTP sheet manufacturing apparatus according to claim 5 is the PTP sheet manufacturing apparatus according to any one of claims 1 to 4, wherein the container film and the cover film are formed using aluminum as a main material.

Here, "formed using aluminum as a main material" means that it is obviously inclusive of a case where it is formed using a single aluminum material, and also inclusive of an aluminum laminated film or the like with a resin film interposed therebetween.

In the past, in PTP sheets, a container film was formed of a resin material such as polypropylene (PP) or polyvinyl chloride (PVC), and a cover film was formed of a metal material such as aluminum.

The material such as aluminum is required to have a large design because it is inferior in workability (ductility) compared with the resin material. Further, since a material such as aluminum has no elasticity and is easily plastically deformed as compared with a resin material, it is difficult to return to an original shape when deformed. This has a problem that the above-described various problems are likely to occur.

Accordingly, the operational effects of claim 1 and the like are more effectively achieved under the structural conditions of the present invention.

Drawings

FIG. 1 (a) is a perspective view showing a PTP sheet, FIG. 1 (b) is a side view showing the PTP sheet, and FIG. 1 (c) is an enlarged partial cross-sectional view showing the PTP sheet of the bag portion;

FIG. 2 (a) is a perspective view showing a PTP membrane, and FIG. 2 (b) is a partially enlarged side view showing the PTP membrane;

FIG. 3 is an external structural view of the PTP packaging machine;

FIG. 4 is a view showing an appearance structure of the sealing device;

FIG. 5 is a schematic side view showing the film receiving roll;

FIG. 6 is an explanatory view for explaining a structure of a film receiving face;

fig. 7 (a) is an external structural view of a conventional sealing device including a cylindrical film receiving roller, and fig. 7 (b) is a partially enlarged cross-sectional view showing a state in which a container film is wound around the conventional cylindrical film receiving roller;

fig. 8 (a) is a schematic diagram showing a PTP sheet warped in the sheet short side direction on the cover film side, fig. 8 (b) is a schematic diagram showing a PTP sheet warped in the sheet long side direction on the container film side, and fig. 8 (c) is a schematic diagram showing a PTP sheet having a warp twist obliquely generated in the diagonal direction.

Detailed Description

One embodiment is described below with reference to the drawings. First, the PTP sheet 1 constituting the object to be manufactured will be specifically described.

As shown in fig. 1 (a) to 1 (c), the PTP sheet 1 includes: a container film 3, the container film 3 having a plurality of pockets 2; and a cover film 4, wherein the cover film 4 is attached to the container film 3 so as to seal the bag portion 2.

The container film 3 and the cover film 4 of the present embodiment are made of a non-transparent material having aluminum as a base material (main material). For example, the container film 3 is formed by an aluminum film (a product in which a synthetic resin film is laminated on an aluminum film). On the other hand, the overcoat film 4 is formed of an aluminum film.

The PTP sheet 1 of the present embodiment is substantially rectangular in plan view, and the film general portion (flange portion) 1a gently warps (bends) in an arc shape in the sheet short side direction (the left-right direction of fig. 1 b) as viewed from the side in the sheet long side direction (the depth direction of the paper surface of fig. 1 b). Specifically, the container film 3 side (upper side in fig. 1 (b)) is recessed, and the cover film 4 side (lower side in fig. 1 (b)) is raised in a convex manner.

In the present embodiment, as described above, the PTP sheet 1 (the film common portion 1a) is tilted in the sheet short side direction, and the generation of the tilt in the sheet long side direction is suppressed, so that the tilt direction and direction are not determined and irregular for each PTP sheet 1.

In order to suppress the occurrence of the warpage in the sheet longitudinal direction, in a general PTP sheet 1 having a sheet width W in the sheet short side direction (see fig. 2 b) of 30 to 85mm, it is preferable that the production is performed such that a distance Cx from the warpage amount Cx, i.e., a distance Cx from a lower end to an upper end of a film general portion 1a in the height direction (the vertical direction in fig. 1 b) of the PTP sheet 1 is greater than 0mm and smaller than 5mm (0mm < Cx < 5 mm).

However, if the amount of lift Cx is too small, there is a problem that it is difficult to obtain the effect of suppressing the occurrence of the lift in the longitudinal direction of the sheet, and on the other hand, if the amount of lift Cx is too large, there is a problem that a trouble occurs in the collecting step or the like. Thus, in the present embodiment, the warpage amount Cx is made to be larger than 1mm and smaller than 3mm (1mm < Cx < 3 mm).

In the PTP sheet 1, two rows of pockets are formed in the sheet short side direction, and each row of pockets is constituted by 5 pocket portions 2 arranged in the sheet long side direction. That is, a total of 10 bag portions 2 are formed. In each pocket 2, tablets 5 as contents are received one at a time.

In the PTP sheet 1, a plurality of needle-eye lines 7 are formed as dividing lines in the sheet short-side direction so as to be dividable in units of the small sheet pieces 6 including a predetermined number (2 in the present embodiment) of the bag portions 2.

In the PTP sheet 1, a label portion 8 on which various information (not shown) such as a tablet name and a lot number is printed is provided at one end in the sheet longitudinal direction.

The PTP sheet 1 of the present embodiment (see fig. 1 (a)) is manufactured through a process of punching a band-shaped PTP film 25 (see fig. 2 (a)) to which a band-shaped container film 3 and a band-shaped cover film 4 are attached in a rectangular shape.

Next, an external configuration of the PTP packaging machine 8, which is a PTP sheet manufacturing apparatus for manufacturing the PTP sheet 1, will be described with reference to fig. 3.

On the most upstream side of the PTP packaging machine 8, a raw roll of the band-like container film 3 is wound in a roll shape. The protruding end side of the container film 3 wound in a roll shape is guided by the guide mechanism 9. The container film 3 is hung on the intermittent transfer roller 11 on the downstream side of the guide mechanism 9. The intermittent conveyance roller 11 is connected to a motor (not shown) that intermittently rotates, and conveys the container film 3 intermittently.

A bag forming device 10 as a bag forming mechanism is provided along the conveying path of the container film 3 between the guide mechanism 9 and the intermittent conveying roller 11. In the pouch portion forming apparatus 10, the pouch portion 2 is formed at a predetermined position of the container film 3 by cold rolling (pouch portion forming step). The bag portion 2 is formed in the intermittent period between the conveying operations of the container film 3 by the intermittent conveying roller 11.

The container film 3 fed from the intermittent conveyance roller 11 is sequentially wound around a conveyance roller 12, a guide roller 13, a tension roller 14, and a guide roller 15. A tablet loading device 16 as a filling mechanism, an inspection device 17 as an inspection mechanism, and a sealing device 20 as a sealing mechanism are provided in this order along the conveyance path of the container film 3 on the downstream side of the guide roller 15.

In the tablet loading device 16, the shutter is opened at predetermined intervals to allow the tablets 5 to fall freely, and the tablets 5 are loaded into the respective pockets 2 in accordance with the opening operation of the shutter (filling step). The inspection device 17 is used to inspect whether or not the tablet 5 is reliably filled in each bag portion 2, whether or not there is an abnormality in the tablet 5, whether or not foreign matter is mixed, and the like.

The sealing device 20 includes a film receiving roller 21, and a sealing roller (heating roller) 22 provided in pressure-contact therewith. The film receiving roller 21 is connected to a motor (not shown) that rotates to some extent, and continuously conveys the container film 3 at a constant speed. Hereinafter, a specific structure of the sealing device 20 will be described.

The stretching roller 14 is in a state of stretching the container film 3 to a side stretched by an elastic force, and prevents the container film 3 from being deflected due to a difference in the conveying operation between the intermittent conveying roller 11 and the film receiving roller 21, thereby constantly maintaining the container film 3 in a stretched state.

On the other hand, the raw material roll of the cover film 4 formed in a band shape is wound in a roll shape on the most upstream side. The protruding end of the cover film 4 wound in a roll shape is guided to the sealing device 20 (between the two rollers 21 and 22) via the guide roller 23.

Next, the container film 3 and the cover film 4 are heated and pressed, and pass between the two

rollers

21 and 22, whereby the cover film 4 is sealed (welded) to the back side of the container film 3, and the bag 2 is closed by the cover film 4 (sealing step). Thereby, the PTP film 25 in which the tablet 5 is filled in each bag portion 2 is manufactured.

The PTP film 25 fed out from the sealing device 20 is wound around the tension roller 27 and the intermittent conveyance roller 28 in this order.

The intermittent transport roller 28 is connected to a motor (not shown) that rotates intermittently, and transports the PTP film 25 intermittently. The tension roller 27 is in a state of stretching the PTP film 25 to a side tensioned by an elastic force, and prevents the PTP film 25 from being flexed due to a difference in the conveying operation between the film receiving roller 21 and the intermittent conveying roller 28, and keeps the PTP film 25 in a tensioned state at ordinary times.

The PTP film 25 fed from the intermittent conveyance roller 28 is wound around the tension conveyance roller 29 and the intermittent conveyance roller 30 in this order. The intermittent transport roller 30 is connected to a motor (not shown) that rotates intermittently, and transports the PTP film 25 intermittently. The tension conveying roller 29 is in a state of stretching the PTP film 25 to a side tensioned by an elastic force, and prevents the PTP film 25 from being bent between the 2 intermittent conveying

rollers

28, 30.

Between the intermittent conveyance roller 28 and the tension conveyance roller 29, an eye-line forming device 33 and an engraving device 34 are provided in this order along the conveyance route of the PTP film 25. The needle-eye line forming device 33 has a function of forming the needle-eye line 7 at a predetermined position of the PTP film 25. The embossing device 34 has a function of embossing identification information indicating a lot number or the like on a predetermined position (label portion 8) of the PTP film 25.

The PTP film 25 fed from the intermittent transport roller 30 is wound around the tension roller 35 and the continuous transport roller 36 in this order on the downstream side. Between the intermittent conveyance roller 30 and the tension roller 35, a sheet pressing device 37 is provided along the conveyance line of the PTP film 25.

The sheet punching device 37 has a function of a sheet punching mechanism (a dividing mechanism) that punches the outer edge of the PTP film 25 in units of PTP sheets 1. In the present embodiment, only one sheet pressing range E of the PTP sheet 1 is provided in the film width direction of the PTP film 25 (see fig. 2 (a)). The sheet punching range E is set so that the sheet long side direction of the PTP sheet 1 punched therefrom is along the film width direction of the PTP film 25, and so that the sheet short side direction of the PTP sheet 1 is along the film long side direction of the PTP film 25.

The PTP pieces 1 punched by the piece punching device 37 are transported by the conveyor 39 and temporarily stored in the finished product hopper 40 (cutting step). However, when a defect is determined by the inspection device 17, the PTP sheet 1 determined to be defective is not fed to the finished product hopper 40, but is individually discharged by a defective sheet discharging mechanism as a discharging mechanism not shown in the drawings, and is fed to a defective product hopper not shown in the drawings.

Then, the PTP sheet 1 received in the finished product hopper 40 is stacked in plural in the collecting step, and then sent to the packaging step. In the integrating step of the present embodiment, for example, as in the case where the surfaces having the pocket portions 2 are aligned with each other, the integrating operation is performed such that the PTP sheets 1 are folded into two 1 groups and then overlapped by a predetermined number of groups (for example, 5 groups 10) each time, or such that the PTP sheets 1 are overlapped by a predetermined number of groups (for example, 5) each time in the same direction. In the packing step, after pillow packing, bundling with a tape, and the like, operations such as boxing are performed.

A cutting device 41 is provided downstream of the continuous conveyance roller 36. The scrap portion 42 remaining in a band shape after the punching by the sheet punching device 37 is guided to the tension roller 35 and the continuous feed roller 36, and then guided to the cutting device 41. Here, the continuous transport roller 36 is pressed by the driven roller 38, and carries out a transport operation while sandwiching the scrap portion 42.

The cutting device 41 has a function of cutting the discard unit 42 to a predetermined size. The trimmed scrap portions 42 are stored in a scrap hopper 43 and then individually discarded.

The basic structure of the PTP packaging machine 8 is as described above, and the structure of the sealing device 20 will be described more specifically below with reference to fig. 4 to 6.

As described above, the sealing device 20 is mainly constituted by the film receiving roller 21 and the sealing roller 22.

In the film receiving roller 21 of the present embodiment, the cross-sectional shape orthogonal to the rotation axis 21a thereof is substantially a regular octagonal shape, and has a substantially octagonal prism shape extending along the rotation axis 21 a.

As shown in fig. 5, on the film receiving roller 21, on the outer circumferential surface thereof, 8 film receiving surfaces 51 are formed at equal angular intervals of 45 ° in the circumferential direction thereof, and a corner portion 52 is formed at a boundary portion between the adjacent two film receiving surfaces 51, 51.

Each film receiving surface 51 is a curved surface having a substantially circular arc shape in cross section orthogonal to the rotation axis 21a, the cross section of the curved surface being convex toward the radial direction outer side of the film receiving roller 21.

That is, the film receiving roller 21 is configured in such a manner that: in the sectional shape orthogonal to the rotation axis 21a, the curvature radius R2 of each film receiving surface 51 is larger than the radius R1 of the circumscribed circle G (see fig. 6), that is, the maximum radius of the film receiving roller 21 (the distance from the rotation axis 21a to each corner 52 of the outer peripheral surface).

In the present embodiment, the curvature radius R2 of each film receiving surface 51 is set to 2 times the maximum radius (radius of the circumscribed circle G) R1 of the film receiving roller 21. Obviously, the curvature radius R2 of each film-receiving surface 51 is not limited to this, and may be set to be at least larger than the maximum radius R1 of the film-receiving roller 21 (1 time the radius R).

However, if the curvature radius R2 of each film receiving surface 51 is too large and is in a state closer to the flat surface F (see fig. 6), the problem described in the above "problem to be solved by the invention" or the like is likely to occur. Thus, it is particularly preferable that the curvature radius R2 of each film receiving surface 51 is set to be less than 3 times the maximum radius R1 of the film receiving roller 21.

Specifically, in the case of manufacturing a normal PTP sheet 1 having a sheet width W in the sheet short side direction of 30 to 85mm, the film receiving roller 21 having a size described below is used in order to make the amount of lift Cx larger than 1mm and smaller than 3 mm.

For example, in the case of manufacturing the PTP sheet 1 having the sheet width W of "30 mm", when the amount of lift Cx in the sheet short side direction is intended to be "1 mm", the film receiving roller 21 having the curvature radius R2 of each film receiving surface 51 of "113 mm" may be used, and when the amount of lift Cx is intended to be "3 mm", the film receiving surface roller 21 having the curvature radius R2 of each film receiving surface 51 of "39 mm" may be used.

That is, in the case of the PTP sheet 1 having the sheet width W of "30 mm", when the amount of warp Cx in the sheet short side direction is intended to be in the range of "1 to 3 mm", the film receiving surface roller 21 having the curvature radius R2 of each film receiving surface 51 in the range of "113 to 39 mm" may be used.

In the case of the PTP sheet 1 having the sheet width W of "85 mm", when the warp amount Cx in the sheet short side direction is intended to be "1 mm", the film receiving roller 21 having the curvature radius R2 of each film receiving surface 51 of "904 mm" may be used, and when the warp amount Cx is intended to be "3 mm", the film receiving surface roller 21 having the curvature radius R2 of each film receiving surface 51 of "303 mm" may be used.

That is, in the case of manufacturing the PTP sheet 1 having the sheet width W of "85 mm", when the amount of warp Cx in the sheet short side direction is intended to be in the range of "1 to 3 mm", the film-receiving surface roller 21 having the curvature radius R2 of each film-receiving surface 51 in the range of "904 to 303 mm" may be used.

Further, as shown in fig. 5, the length S of the arc of the circumference of the film receiving roller 21 in each film receiving surface 51 is a length corresponding to the sheet formation pitch P of the PTP sheet 1 (see fig. 2 (b) — then, in the film receiving surface 51, bag receiving recesses 53 that can receive the bag portions 2 of the container film 3 are formed in two rows (10 in total) at a time corresponding to one PTP sheet 1.

The pocket-receiving recess 53 is formed in such a manner that its central axis 53a is orthogonal to a tangent of the film-receiving surface 51. I.e. in the radial direction of the film receiving surface 51.

Next, the film receiving roller 21 is rotated and driven by a motor not shown in the drawings, and while hooking the bag portion 2 of the container film 3 through the bag portion receiving recess 53, the container film 3 is continuously conveyed by its own rotation.

The seal roller 22 has a cylindrical shape, and a cross-sectional shape orthogonal to the rotation axis 22a thereof is a circular shape. The sealing roller 22 is heated to a predetermined temperature by a predetermined heating mechanism not shown in the figure. In order to achieve a strong seal, fine ridges (not shown) are formed in a grid pattern on the outer circumferential surface of the seal roller 22.

The seal roller 22 is rotatably supported by one end of a predetermined arm 61. The arm 61 is provided so as to be movable tiltably with its rotation shaft 62 as a fulcrum. On the other end side of the arm 61, a biasing mechanism 63 constituted by a cylinder, a spring, or the like is provided. Thereby, the seal roller 22 is pressed against the film receiving roller 21 side at ordinary times. The seal roller 22 rotates in accordance with the operation of the film receiving roller 21 (cover film 4).

Under the conditions of this configuration, as described above, the container film 3 and the cover film 4 are fed between the two

rollers

21 and 22, and the two

films

3 and 4 are passed between the two

rollers

21 and 22 in a heated and pressed state, whereby the cover film 4 is sealed on the back side of the container film 3.

Further, as shown in fig. 2 (b), in the PTP film 25, a plurality of bent portions 25a are generated at portions corresponding to the corner portions 52 of the film receiving roller 21, and the bent portions 25a are boundary portions between the PTP pieces 1, so if it is intended to press the PTP pieces 1 in a range (piece width W) other than the bent portions 25a at the time of piece pressing in such a manner that the bent portions 25a constitute the scrap portions 42, the PTP pieces 1 in which the whole of the piece short side direction is gently tilted can be obtained (see fig. 1 (a)).

In the present embodiment, as shown in fig. 3, the intermittent transport roller 28, the stretching transport roller 29, and the intermittent transport roller 30, which are located downstream of the sealing device 20 and in a positional relationship facing the bag portion 2 of the PTP film 25, have the same configuration as the film receiving roller 21.

That is, each of the

transport rollers

28, 29, and 30 has a substantially octagonal prism shape, and 8 film receiving surfaces are formed on the outer peripheral surface thereof, and each of the film receiving surfaces is a curved surface having a substantially circular arc-shaped cross section and protruding outward in the radial direction. Here, the radius of curvature of each film receiving surface of each

transport roller

28, 29, 30 is set to be the same as the radius of curvature of each film receiving surface of the film receiving roller 21.

The

transport rollers

28, 29, and 30 have bag receiving recesses capable of receiving the bag portions 2 of the PTP films 25 on the film receiving surfaces, and transport the PTP films 25 by rotating themselves while hooking the bag portions 2 of the PTP films 25 through the bag receiving recesses.

Thus, after the lift-up at the sealing device 20, the PTP films 25 passed through the respective conveying

rollers

28, 29, 30 can be lifted up with the same curvature as the film receiving roller 21.

As described specifically above, the film receiving roller 21 of the present embodiment is not in the shape of a conventional cylinder but is in a structure having a substantially octagonal prism shape having 8 film receiving surfaces 51 provided at a predetermined interval in the circumferential direction thereof on the outer circumferential surface thereof, and having a film receiving recess 53 in each film receiving surface 51.

Each film receiving surface 51 has a curved surface that is convex outward in the radial direction of the film receiving roller 21 and has a substantially circular arc-shaped cross section, in a cross section orthogonal to the rotation axis 21a of the film receiving roller 21.

That is, in the film receiving roller 21, the cross-sectional shape orthogonal to the rotation axis 21a is configured such that the curvature radius R2 of each film receiving surface 51 is larger than the maximum radius (the radius of the circumscribed circle G) R1 thereof. In the present embodiment, the curvature radius R2 of each film receiving surface 51 is set to 2 times the maximum radius R1 of the film receiving roller 21.

Thus, each film receiving surface 51 of the film receiving roller 21 of the present embodiment forms an arc-shaped curved surface gentler than the outer peripheral surface (film receiving surface) of the cylindrical film receiving roller having the same diameter as the circumscribed circle G.

Thus, the film receiving roller 21 of the present embodiment is less likely to apply an undue bending stress or the like to the bag portion 2 of the container film 3 and the film general portion 1a around the bag portion, as compared with the conventional cylindrical film receiving roller, and is more likely to appropriately wrap around the container film 3, thereby making it less likely to cause the container film 3 to float.

As a result, the normal film portion 1a can be sealed in a more nearly flat state, and various defects such as crushing of the bag portion 2 and bending of the normal film portion 1a, and wrinkles in the attached cover film 4 can be suppressed.

In the present embodiment, in the sheet pressing device 37, the sheet pressing range E is set such that the sheet long side direction of the PTP sheet 1 is along the film width direction of the PTP film 25 and the sheet short side direction is along the film long side direction of the PTP film 25 so as to be cut from the PTP film 25.

As a result, PTP sheet 1 gently warped toward container film 3 side in the sheet short side direction can be produced.

Thus, according to the present embodiment, as compared with the case where the cover film 4 is sealed to the container film 3 in a flat state as in the above-described patent document 1, the occurrence of a problem that the PTP sheets 1 having different shapes are produced with the orientation and direction of the warp thereof being varied for each PTP sheet 1 can be suppressed.

For example, it is possible to reduce the problems of manufacturing a PTP sheet (see fig. 8 (a)) tilted to the cover side, a PTP sheet (see fig. 8 (b)) tilted to the container film side in the sheet longitudinal direction, a PTP sheet (see fig. 8 (c)) tilted in the diagonal direction, and the like.

As a result, the occurrence of defective products can be suppressed. Further, it is possible to suppress a decrease in productivity by causing a trouble in the subsequent step such as overlapping of a plurality of PTP sheets 1 in an aggregation step (for example, a state in which PTP sheets 1 are wrapped in a pair). Further, it is not necessary to use a film receiving roll having a larger diameter, and the size of the apparatus can be suppressed.

Further, according to the film receiving roller 21 of the present embodiment, since the film receiving surface 51 is a gently curved surface having an arc shape, compared with the film receiving roller of patent document 1 (a polygonal-prism-shaped film receiving roller having a plurality of flat surfaces on the outer peripheral surface thereof), for example, due to the rigidity of the container film 3, the arrangement of the bag portion 2, and the like, it is possible to suppress occurrence of a trouble such as a partial floating of the container film 3 which is wound and is not uniformly adhered to the entire flat surface (film receiving surface) of the film receiving roller. As a result, the sealing roller 22 can be pressed to seal the container film 3 in a state of being more uniformly adhered to the film receiving surface 51 of the film receiver 21.

Further, in the present embodiment, the intermittent transport roller 28, the tension transport roller 29, and the intermittent transport roller 30 located on the downstream side of the sealing device 20 have a substantially octagonal prism shape in which 8 film receiving surfaces are formed on the outer peripheral surface thereof, and each of the film receiving surfaces is a curved surface having a substantially circular arc shape in cross section which is convex toward the outside in the radial direction, similarly to the film receiving roller 21.

Here, when a cylindrical transport roller having the same diameter as the maximum radius (radius of the circumscribed circle g) R1 of the film receiving roller 21 is used on the downstream side of the sealing device 20, there is a problem that the PTP film 25 with the appropriate warping by the sealing device 20 is warped with an excessively large curvature, and the amount of warping of the PTP sheet 1 completed is larger than the appropriate amount. Here, when the diameter of the cylindrical transport roller is large, there is a problem that the apparatus becomes large.

On the other hand, when a film receiving roller having a polygonal prism shape with a plurality of flat surfaces on its outer peripheral surface is used as the transport roller on the downstream side of the sealing device 20, as in the film roller receiving roller of patent document 1, there is a problem that the warping of the PTP film 25 applied by the sealing device 20 is corrected on the flat surfaces, and the amount of warping of the completed PTP sheet 1 is smaller than an appropriate amount.

In contrast, according to the present embodiment, after the lift-up is applied to the sealing device 20, the lift-up is applied to the PTP films 25 of the

transport rollers

28, 29, and 30 with the same curvature as that of the film receiving roller 21, and the occurrence of the above-described problem can be suppressed.

The present invention is not limited to the description of the above embodiments, and may be implemented as follows. Obviously, other application examples and modifications not listed below are of course possible.

(a) Although the above embodiment is embodied in the case where the content is the tablet 5, the content may be filled with, for example, food, electronic components, or the like, without being limited to the type, shape, or the like of the content. Obviously, the shape, size, and the like of the bag portion 2 formed corresponding to the contents are not limited to the above-described embodiment.

(b) The structure of the manufactured PTP sheet is not limited to the above embodiment. For example, the arrangement and number of the bag portions 2 of each PTP sheet 1 unit are not limited to the above embodiments at all, and PTP sheets having various arrangements and numbers, including 3 rows and 12 types of bag portions 2, may be used.

Further, for example, in the PTP sheet 1 having 10 bag portions 2 in total formed in two rows in the left and right direction in the sheet short side direction by a bag row constituted by 5 bag portions 2 arranged in the sheet long side direction, the bag portions 2 in the left row in the two rows in the left and right row are shifted by half pitch in the sheet long side direction with respect to the bag portions 2 in the right row, and the bag portions constituting the two rows in the two rows are provided so as to be different from each other in the left and right direction.

In the PTP sheet 1 of the above embodiment, the needle-eye lines 7 as the split lines are formed, but the split lines are not limited to this, and may be configured differently depending on the material of the container film 3 and the cover film 4. Further, the needle thread 7 and other such cutting lines may not be formed.

(c) The material of each of the

films

3 and 4 is not limited to a metal material mainly composed of aluminum, and other materials such as a resin material may be used. Even when the container film 3 is formed of a resin material such as PP or PVC, the bag portion 2 may be crushed due to the structure thereof when the shape of the bag portion 2 is large.

(d) In the above embodiment, the film receiving roller 21 has a substantially octagonal prism shape. The present invention is not limited to this, and other structures may be employed if the film receiving surface 51 has a polygonal prism shape having a curved surface.

In addition, instead of the configuration in which the corner portion of the film receiving roller 21 is pointed, a configuration in which the corner portion 52 has a spherical portion may be adopted. If formed in this manner, the occurrence of the above-described bent portion 25a of the PTP film 25 can be reduced.

(e) In the above embodiment, the length S of each receiving surface 51 in the circumferential direction of the film receiving roller 21 (the same for all the transport rollers 28, 29, 30) is set to a length corresponding to 1 pitch of the sheet forming pitch P of the PTP sheet 1 in the longitudinal direction of the PTP film 25, but the forming range of the film receiving surface 51 is not limited to this. For example, the length S of each film receiving surface 51 may be a length corresponding to n pitch amounts (n is a natural number of 2 or more) of the sheet formation pitch P of the PTP sheet 1.

(f) In the above-described embodiment, a structure is formed in which the pocket receiving recesses 53 are formed in each film receiving surface 51 in two rows (10 in total) at a time, corresponding to the arrangement structure of the pockets 2 of one PTP sheet 1. The arrangement structure of the bag receiving recess 53 is not limited thereto.

For example, an arrangement is made wherein PTP sheets provided with the bag portions 2 offset from each other in the left row in the above-described left-right two-row bag rows are offset by half a pitch in the sheet longitudinal direction with respect to the bag portions 2 in the right row, two rows of bag receiving concave portions 53 are formed in the circumferential direction of the film receiving roller 21, and the bag receiving concave portions 53 in the circumferential direction one row are offset by half a pitch in the direction of the rotational axis 21a with respect to the bag receiving concave portions 53 in the circumferential direction the other row.

In addition, a structure may be made wherein the bag receiving recesses 53 are formed only at one location (one row) in the circumferential direction of the film receiving roller 21.

(g) In the above embodiment, only one PTP sheet 1 is formed in the width direction of the PTP film 25 (the direction of the rotation axis 21a of the film receiving roller 21), but the invention is not limited to this, and a plurality of PTP sheets 1 may be formed in the width direction of the PTP film 25.

(h) In the above embodiment, the

transport rollers

28, 29, and 30 located on the downstream side of the sealing device 20 are the same as the film receiving roller 21, but the present invention is not limited thereto, and other structures such as a conventional cylindrical transport roller may be used.

In addition, not all of the

transport rollers

28, 29, and 30 may be replaced with at least one of them, which is formed into a polygonal prism.

Further, a contact roller that is pressed (pressed) against the

transport rollers

28, 29, and 30 may be provided. This prevents the PTP film 25 wound around the

transport rollers

28, 29, and 30 from falling off, and the application of the above-described lift-up can be performed more reliably.

Description of reference numerals:

reference numeral 1 denotes a PTP slice; reference numeral 1a denotes a membrane general portion;

reference numeral 2 denotes a bag portion; reference numeral 3 denotes a container film;

reference numeral 4 denotes a mask film; reference numeral 5 denotes a tablet;

reference numeral 8 denotes a PTP packaging machine; reference numeral 10 denotes a bag portion forming device;

reference numeral 16 denotes a tablet feeding device; reference numeral 20 denotes a sealing device;

reference numeral 21 denotes a film receiving roller; reference numeral 21a denotes a rotation axis;

reference numeral 22 denotes a seal roller; reference numeral 25 denotes a PTP membrane;

reference numeral 28 denotes an intermittent receiving roller; reference numeral 29 denotes a tension conveying roller;

reference numeral 30 denotes an intermittent conveyance roller; reference numeral 37 denotes a sheet punching means;

reference numeral 51 denotes a film receiving surface; reference numeral 52 denotes a corner portion;

reference numeral 53 denotes a bag receiving recess; symbol Cx denotes a warpage amount;

symbol E represents a sheet punching range; symbol G denotes a circumscribed circle;

reference numeral P denotes a sheet forming pitch;

reference numeral R1 denotes the maximum radius of the film receiving roller (the radius of the circumscribed circle);

reference numeral R2 denotes a radius of curvature of the film-receiving surface;

symbol S represents the length of the arc of the film receiving surface;

symbol W represents the patch width.

Claims

1. A PTP sheet manufacturing apparatus comprising:

a filling mechanism for filling the bag with the content;

a cutting mechanism for cutting a PTP piece from a band-shaped PTP film having the cover film attached to the container film;

wherein the cutting mechanism cuts the PTP sheet from the PTP film in the following manner: the sheet longitudinal direction of the PTP sheet is along the film width direction of the PTP film, and the sheet short direction of the PTP sheet is along the film longitudinal direction of the PTP film,

the above-mentioned sealing mechanism includes:

a film receiving roller having a first bag receiving recess portion capable of receiving a bag portion of the container film, the film receiving roller being capable of conveying the container film by rotation thereof while hooking the bag portion by the first bag receiving recess portion;

a sealing roller for heating capable of being pressed against the film receiving roller,

a sealing mechanism for attaching the cover film to the container film by feeding the container film and the cover film between the film receiving roller and the sealing roller and heating and pressing the container film and the cover film;

an outer peripheral surface of the film receiving roller has a substantially polygonal prism shape having a plurality of first film receiving surfaces provided at predetermined intervals in a circumferential direction thereof, each of the first film receiving surfaces having the first bag receiving recess;

each of the first film receiving surfaces has a curved surface in a cross section orthogonal to the rotation axis of the film receiving roller, and the cross section of the curved surface has a substantially circular arc shape convex outward in the radial direction of the film receiving roller.

2. A PTP sheet manufacturing apparatus according to claim 1, wherein the radius of curvature of the film receiving roller is set so as to be larger than the radius of the circumscribed circle of the film receiving roller and smaller than 3 times the radius of the circumscribed circle.

3. A PTP sheet manufacturing apparatus according to claim 1, wherein a length of each of the first film receiving faces in a circumferential direction of the film receiving roller is set to a length corresponding to 1 pitch of a sheet forming pitch of the PTP sheet in a longitudinal direction of the PTP film;

in each of the first film receiving surfaces, the first bag receiving recess portion is formed at a plurality of positions different in position in at least the circumferential direction of the film receiving roller, corresponding to the bag portion of the PTP sheet.

4. A PTP sheet manufacturing apparatus according to claim 2, wherein a length of each of the first film receiving faces in a circumferential direction of the film receiving roller is set to a length corresponding to 1 pitch of a sheet forming pitch of the PTP sheet in a longitudinal direction of the PTP film;

5. The PTP sheet manufacturing apparatus according to claim 1, including a plurality of transport rollers at least on a downstream side of the sealing mechanism, the plurality of transport rollers having a second bag receiving recess portion capable of receiving the bag portion of the PTP film, and being capable of transporting the PTP film by rotation thereof while hooking the bag portion by the second bag receiving recess portion;

an outer peripheral surface of at least one of the plurality of transport rollers has a substantially polygonal columnar shape having a plurality of second film receiving surfaces provided at predetermined intervals in a circumferential direction thereof, and each of the second film receiving surfaces has the second bag receiving recess;

each of the second film receiving surfaces has a curved surface in a cross section orthogonal to the rotation axis of the film receiving roller, the curved surface having a substantially circular arc shape in cross section projecting outward in the radial direction of the transport roller.

6. A PTP sheet manufacturing apparatus according to claim 2, including a plurality of transport rollers at least on a downstream side of the sealing mechanism, the plurality of transport rollers having second bag receiving recesses capable of receiving the bag portions of the PTP film, and being capable of transporting the PTP film by rotation thereof while hooking the bag portions by the second bag receiving recesses;

7. A PTP sheet manufacturing apparatus according to claim 3, including a plurality of transport rollers at least on a downstream side of the sealing mechanism, the plurality of transport rollers having second bag receiving recesses capable of receiving the bag portions of the PTP film, and being capable of transporting the PTP film by rotation thereof while hooking the bag portions by the second bag receiving recesses;

8. The PTP sheet manufacturing apparatus according to claim 4, including a plurality of transport rollers at least on a downstream side of the sealing mechanism, the plurality of transport rollers having a second bag receiving recess portion capable of receiving the bag portion of the PTP film, and being capable of transporting the PTP film by rotation thereof while hooking the bag portion by the second bag receiving recess portion;

9. A PTP sheet manufacturing apparatus according to any one of claims 1 to 8, wherein the container film and the cover film are formed of aluminum as a main material.