JP2016078927A - Ptp sheet manufacturing device and method for manufacturing ptp sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a PTP sheet manufacturing device which can suppress deformation of a sheet due to shrinkage after thermal expansion.SOLUTION: A PTP sheet manufacturing device for forming plural pocket parts 1a on a transported belt-like sheet 1 is characterized in that the device is equipped with: heating means 11 which is provided on a transportation route of the sheet 1 and heats at least a first area of the sheet 1; cooling means 12 which is provided on the transportation route on a downstream side with respect to the heating means 11 and cools a second area other than the first area of the sheet 1 after heating; and forming means 13 which is provided on the transportation route on a downstream side with respect to the cooling means 12 and forms the pocket part on the first area.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a PTP sheet manufacturing apparatus and a PTP sheet manufacturing method for forming a plurality of pocket portions on a sheet.

  2. Description of the Related Art Conventionally, in a PTP (Press Through Packaging) sheet manufacturing apparatus that forms a plurality of pocket portions for containing tablets or the like, only the molded portion of the pocket is heated in a point manner (hereinafter also referred to as “point heating”). Is known (see, for example, Patent Document 1).

Japanese Patent No. 2690243

  In the PTP sheet manufacturing apparatus for forming the pocket portion, the upper and lower sheets are sandwiched and fixed with a strong force while the sheet is heated and softened, the concave pocket portion is formed, and then cooled to harden the pocket portion (the concave portion). Fix the shape).

  As a material of the PTP sheet, a polyvinyl chloride (PVC) film or a polypropylene (polypropylene: PP) film is used. However, in particular, when a PP film is used, it shrinks by cooling after thermal expansion. That countermeasure is necessary.

  Specifically, the PP film thermally expands by about 2% to 5% by heating, and shrinks when cooled for curing after forming the pocket portion. At this time, since the PP film is sandwiched and fixed by a very strong force between the upper and lower molding plates, the PP film cannot shrink even when cooled. Further, the concave pocket portion cannot be contracted because the contraction is restricted by the upper and lower molds having the concave and convex shapes. When the molding plate is opened and the PP film is released, the PP film is cooled and hardened, so that the shrinkage is inhibited and the film cannot be completely shrunk and stress remains in the film. That is, the shrinkage proceeds mainly in a planar region other than the concave pocket portion, while the shrinkage is regulated by the concave shape in the concave pocket portion and its vicinity (without shrinkage), and the stress remains. . And this residual stress is gradually released over time and the molded PP film shrinks, so the PTP sheet gradually bends and deforms over time (for example, the entire sheet curls, There is a problem that the pocket portion is deformed particularly in the length direction of the PTP sheet.

  For this reason, for example, in Patent Document 1, heating is divided into several stages and finally only the molding region of the pocket portion is partially heated (point heating) to prevent curling due to shrinkage. Yes.

  However, since the pocket portion is generally a very small region, in the case of point heating, it is difficult to align the heating region that requires heating a plurality of times. Even if the alignment can be performed accurately, it is more difficult to accurately heat only the pocket portion (region to be formed into a concave shape), and there is a problem that heating around the pocket portion is unavoidable.

  In addition, the production efficiency is improved when the number of moldings of the pocket portion by the molding die is as large as possible. However, when the number of moldings of the pocket portion is large, the area where the PP film is sandwiched between the molding dies increases, and the shrinkage is caused by that amount. Since the influence also becomes large, there was a limit to the expansion of the pocket portion molding region.

  Furthermore, it is necessary to replace the mold with the film of material. That is, the PP film shrinks by cooling as described above, but the PVC film expands thermally by heating, but hardly shrinks by cooling. That is, when using a PP film, a mold that is 1% to 2% larger than the finished size is used in consideration of the amount of shrinkage, but a PVC film uses a mold of the finished size (full size), There was also a problem that the mold had to be changed depending on the material (whether it was a PP film or a PVC film).

  This invention is made | formed in view of the said subject, and it aims at providing the PTP sheet manufacturing apparatus and PTP manufacturing method which can suppress the deformation | transformation of the sheet | seat by shrinkage | contraction after thermal expansion.

  (1) The present invention is a PTP sheet manufacturing apparatus for forming a plurality of pocket portions in a belt-shaped sheet to be transported, and is provided on a transport path of the sheet and includes a region including a first region of the sheet. A heating unit that heats, a cooling unit that is provided on a conveyance path downstream of the heating unit and that cools an area other than the first area of the sheet, and a conveyance path that is downstream of the cooling unit. And a forming means for forming the pocket portion in the first region.

  According to such a configuration, since the non-molded region of the pocket portion can be contracted in advance before the pocket portion is molded, the stress remaining in the pocket portion and its vicinity as compared with the case of cooling after the pocket portion is molded. A PTP sheet manufacturing apparatus that can be significantly reduced can be provided. As a result, the entire PTP sheet is gradually bent and deformed over time (for example, the entire sheet is curled or the pocket portion is deformed particularly in the length direction of the PTP sheet). .

  Moreover, the non-molding region of the pocket portion can be efficiently cooled.

  (2) In the present invention, the cooling unit includes a cooling surface that is in contact with or close to the sheet, and an opening is provided at a position corresponding to the first region of the cooling surface. A plurality of PTPs are provided in the sheet conveyance direction corresponding to the first region, and the area of the opening gradually increases toward the upstream direction. The PTP according to (1), It is a sheet manufacturing apparatus.

  According to such a structure, even if it is a case where a non-molding area | region is cooled and shrink | contracted before shaping | molding of a pocket part, the formation plan area | region of a pocket part can be ensured to an appropriate magnitude | size.

  In addition, even when the non-molded region is cooled and contracted before the pocket portion is molded, the region where the pocket portion is to be formed can be secured at an appropriate position.

  (3) Further, in the present invention, the cooling unit includes a pressing member, and the pressing member presses the cooling surface so as not to prevent the contraction of the sheet while improving the adhesion with the sheet. It is a PTP sheet manufacturing apparatus as described in said (1) or (2) characterized.

  According to such a structure, sufficient shrinkage can be promoted for the non-molded region of the pocket portion.

  (4) The PTP sheet manufacturing apparatus according to any one of (1) to (3), wherein the heating unit heats the entire surface of the sheet.

  According to such a configuration, the sheet can be easily heated as compared with the case of partial heating (in the case of point heating). In the case of point heating, it is difficult to align the heating area that requires multiple heating. Even if the alignment can be performed accurately, it is more difficult to accurately heat only the pocket portion (region to be formed into a concave shape), and there is a problem that heating around the pocket portion is unavoidable. According to the present invention, since the entire surface of the heating region is heated all at once, alignment is unnecessary, the sheet can be easily heated, and work efficiency can be improved.

  (5) The PTP sheet manufacturing apparatus according to any one of (2) to (4), wherein the present invention further includes auxiliary heating means that can protrude from the opening of the cooling means. .

  According to such a configuration, while cooling the non-molding region of the pocket portion, it is possible to prevent the cooling from reaching the pocket portion forming region.

  (6) The PTP according to any one of (1) to (5) above, further comprising another cooling means for cooling at least the first region downstream of the molding means. It is a sheet manufacturing apparatus.

  (7) The present invention is a PTP sheet manufacturing method in which a plurality of pocket portions are formed in a belt-like sheet to be conveyed, and a heating unit includes a region including a first region of the sheet on the sheet conveyance path. And a step of cooling a region other than the first region of the sheet by a cooling unit on a conveyance path downstream of the heating unit, and a conveyance path downstream of the cooling unit, Forming the pocket portion in the first region by a forming means. A method for producing a PTP sheet, comprising:

  According to such a configuration, since the non-molded region of the pocket portion can be contracted in advance before the pocket portion is molded, the stress remaining in the pocket portion and its vicinity as compared with the case of cooling after the pocket portion is molded. It is possible to provide a PTP sheet manufacturing method that can be significantly reduced. As a result, the entire PTP sheet is gradually bent and deformed over time (for example, the entire sheet is curled or the pocket portion is deformed particularly in the length direction of the PTP sheet). .

  (8) The present invention is also the PTP sheet manufacturing method according to (7), wherein the cooling unit cools the sheet in close contact with or in proximity to the heated sheet.

  According to the PTP sheet manufacturing apparatus and the PTP manufacturing method of the present invention, it is possible to provide a PTP sheet manufacturing apparatus and a PTP manufacturing method that can suppress deformation of the sheet due to shrinkage after thermal expansion.

It is a figure which shows the PTP sheet manufacturing apparatus in 1st Embodiment of this invention, (A) is a side view, (B) is a top view. It is a side view which extracts and shows a part (upstream cooling device) of the PTP sheet manufacturing apparatus in 1st Embodiment of this invention, (A) is a side view which shows the upstream cooling device at the time of sheet conveyance, (B) FIG. 3 is a side view showing an upstream cooling device during sheet cooling. It is a figure which shows the PTP sheet in embodiment of this invention, (A) is a top view, (B) is a side view. It is a top view explaining the PTP sheet manufacturing apparatus in a 1st embodiment of the present invention. It is a side view explaining the PTP sheet manufacturing apparatus in 2nd Embodiment of this invention. It is a figure explaining the PTP sheet manufacturing apparatus in 3rd Embodiment of this invention, (A) is a side view, (B) is a top view.

  Hereinafter, a PTP (Press Through Packaging) sheet manufacturing apparatus 10 according to the present invention will be described in detail with reference to FIGS. 1 to 3.

<First Embodiment>
FIG. 1 is a view showing an example of a PTP sheet manufacturing apparatus 10 of the present embodiment, FIG. 1 (A) is a side view, and FIG. 1 (B) is a top view. 1B is a top view in which a part of the PTP sheet manufacturing apparatus 10 is not shown so as to expose the sheet being processed. 2 is a partially enlarged view of FIG. 1A, FIG. 3 is a view showing the shape of the sheet 1 manufactured by the PTP sheet manufacturing apparatus 10 of FIG. 1, and FIG. It is a top view of the sheet | seat 1 after the pocket part 1a shaping | molding, FIG.3 (B) is the partially expanded sectional view. In addition, in this figure and each subsequent figure, one part structure is abbreviate | omitted suitably and drawing is simplified.

  The PTP sheet manufacturing apparatus 10 includes a heating device 11, an upstream cooling device 12, a pocket forming device 13 and a downstream cooling device 14, and the sheet 1 has a large number of pocket portions 1a (see FIG. 1B and FIG. 2). ).

  FIG. 1 shows, for example, a belt-like sheet 1 having a predetermined width W (indicated by a two-dot chain line) whose molding surface (a surface parallel to the conveyance surface and on which the pocket portion 1a is molded) is a floor surface. It is a figure of the state conveyed in the conveyance direction T (in the illustration left side to the right side) so that it may become substantially parallel.

  As shown in FIG. 1 (A), the PTP sheet manufacturing apparatus 10 conveys the belt-like sheet 1 from the original roll by intermittent feeding, and a concave pocket portion that protrudes downward to a predetermined position of the sheet 1 during the conveyance. A large number of 1a is formed (also referred to as molding or formation) and is used in a PTP package manufacturing apparatus. The PTP package stores a packaged object (for example, a tablet) in the pocket portion 1a of the sheet 1, and wraps the packaged object by crimping an upper lid separate from the sheet 1 to the sheet 1, and when opened This is a package in which the contents are pushed out from the pocket portion 1a side to break the upper lid and take out the package.

  On the conveyance path of the sheet 1, the heating device 11, the upstream cooling device 12, the pocket forming device 13, and the downstream cooling device 14 are arranged in this order from the upstream side (left side in the drawing) to the downstream side (right side in the drawing). Be placed.

  As shown in FIG. 5B, the heating device 11 heats at least the first region (the pocket portion forming scheduled region 1p) of the sheet 1. The upstream cooling device 12 cools the second region of the heated sheet 1. The second region is a region other than the pocket portion forming planned region 1p (pocket portion non-forming region 1n, that is, a region where a plane is maintained after the PTP sheet is completed). Further, the downstream cooling device 14 cools at least the first region (region including the pocket portion 1a) after the pocket portion 1a is formed. That is, the first region is the pocket portion forming scheduled region 1p before the pocket portion is formed, and is the pocket portion 1a (and an error region in the vicinity thereof) after the pocket portion 1a is formed.

  More specifically, as shown in FIG. 3A, the heating device 11 has two heating plates (an upper heating plate 111 and a lower heating plate 112) that face each other with the sheet 1 interposed therebetween. Note that “upper” and “lower” of the upper heating plate 111 and the lower heating plate 112 are for convenience of explanation and mean that there are two heating plates facing each other across the sheet 1. That is, when the sheet 1 is conveyed so that the molding surface of the sheet 1 is substantially horizontal to the floor surface, the heating plate facing the first molding surface side S1 of the sheet 1 is the upper heating plate 111, and the first plate of the sheet 1 is 2 The heating plate facing the molding surface side S2 will be described as the lower heating plate 112. However, the present invention is not limited to this, and the sheet 1 may be conveyed substantially vertically or obliquely close to the vertical direction (obliquely upward, obliquely downward). In that case, the left heating plate 111, the right heating plate 112, etc. Become. The surfaces of the upper heating plate 111 and the lower heating plate 112 facing the sheet 1 are both flat surfaces.

  The upper heating plate 111 and the lower heating plate 112 are arranged in close contact with each other in close contact with the sheet 1. The upper heating plate 111 and the lower heating plate 112 are provided to be movable in the vertical direction (here, the vertical direction) with respect to the molding surface of the sheet 1. In addition, the distance (gap) x between the upper heating plate 111 and the lower heating plate 112 is appropriately selected depending on the thickness of the sheet 1, but as an example, x = 0 when heating for forming (at the time of closest approach). .About.3 mm to 0.5 mm, and x> 10 mm when the sheet is conveyed. Further, it is further separated (for example, about several tens of centimeters) during maintenance. The sheet 1 passing through the heating device 11 is heated and softened, for example, at about 140 ° C. across the entire surface sandwiched between the upper heating plate 111 and the lower heating plate 112. Further, the sheet 1 is thermally expanded by this heating by about 2% to 5%. The length of the sheet 1 of the heating device 111 in the length direction is, for example, about 1 m.

  In this embodiment, the upstream cooling device 12 is housed in a space 15 provided at the downstream end of the heating device 11 so as to be separated from the heating device 11. The upstream cooling device 12 has two cooling plates (upstream upper cooling plate 121 and upstream lower cooling plate 122) facing each other with the sheet 1 interposed therebetween. The names of “upper” and “lower” of the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are the same as those of the heating device 11. The surfaces of the upstream upper cooling plate 121 and the upstream lower cooling plate 122 facing the sheet 1 are both flat surfaces.

  The upstream upper cooling plate 121 and the upstream lower cooling plate 122 are disposed to face each other with the sheet 1 interposed therebetween. The opposing surfaces of the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are cooling surfaces SC that approach or contact the sheet 1 and cool it. The upstream upper cooling plate 121 and the upstream lower cooling plate 122 are provided so as to be movable in the vertical direction (here, the vertical direction) with respect to the forming surface of the sheet 1, and when the sheet 1 is conveyed, the above distance (gap) x However, when the sheet 1 is cooled, it is in close contact with the sheet 1 from above and below, and only a part of the sheet 1 is cooled. That is, the upstream cooling device 12 is a partial cooling device that cools a part of the sheet 1 heated and softened by the heating device 11.

  The upstream upper cooling plate 121 is movable in the vertical direction by an air cylinder 16A coupled to its upper surface, and the upstream lower cooling plate 122 is movable in the vertical direction by an air cylinder 16B coupled to its lower surface.

  An upstream upper cooling plate support 181 is provided above the upstream upper cooling plate 121, and an upstream lower cooling plate support 182 is provided below the upstream lower cooling plate 122. In this example, the upstream upper cooling plate support 181 and the upstream lower cooling plate support 182 are provided at the downstream end of the upper heating plate 111 and the downstream end of the lower heating plate 112, respectively. Does not have a heating function. However, since these heats are transmitted to be heated to the same temperature by being attached to the upper heating plate 111 and the lower heating plate 112, the sheet 1 in the region indicated by hatching in FIG. 1 is also heated. Is done. Note that the size of the hatched area varies depending on the size of the sheet 1.

  When the seat 1 moves, the air cylinders 16A and 16B are retracted (retracted so as to be separated from each other in the figure), and when the seat 1 is stopped and cooled, the pressure of a regulator (not shown) is adjusted to be appropriate. Protrusions by force. As a result, the upstream upper cooling plate support 181 and the upstream lower cooling plate support 182 are close to or separated from each other.

  The upstream upper cooling plate support 181 includes a vertical drive mechanism (for example, a slide bush 19) inside, and the upstream upper cooling plate 121 is coupled to the tip of the slide bush 19. A pressing member (not shown here) is inserted between the lower surface of the upstream upper cooling plate support 181 and the upper surface of the upstream upper cooling plate 121. The pressing member will be described later with reference to FIG. Accordingly, the upstream upper cooling plate 121 can move up and down together with the upstream upper cooling plate support 181 and can also move up and down with respect to the upstream upper cooling plate support 181.

  Although illustration is omitted, the configurations of the upstream lower cooling plate 122 and the upstream lower cooling plate support 182 are the same. That is, the upstream lower cooling plate support portion 182 includes a vertical (here, vertical) direction drive mechanism (for example, the slide bush 19) inside, and the upstream lower cooling plate 122 is coupled to the tip of the slide bush 19. A coil spring 20 is inserted between the lower surface of the upstream lower cooling plate support 182 and the upper surface of the upstream lower cooling plate 122, and the upstream lower cooling plate 122 can move up and down together with the upstream lower cooling plate support 182. At the same time, it can also move up and down with respect to the upstream lower cooling plate support 182.

  As shown in FIG. 5B, the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are plate-like bodies, and a cooling water circulation path 28 is provided at one end of each sheet 1 in the width direction. Cooling water can be circulated inside each of the upper cooling plate 121 and the upstream lower cooling plate 122. Further, on the cooling surface SC of the upstream upper cooling plate 121 and the upstream lower cooling plate 122, an opening 123 is provided at a position corresponding to the first region, that is, the pocket portion forming scheduled region 1p. That is, the sheet 1 sandwiched between the upstream upper cooling plate 121 and the upstream lower cooling plate 122 is not cooled in the pocket portion forming planned region 1p (first region) facing the opening 123, and other regions, that is, The pocket non-molding region 1n (second region) is cooled. That is, the upstream cooling device 12 cools only the pocket non-molding region 1n, which is a flat portion of the PTP sheet, without molding with a mold or pressure, and promotes shrinkage of the pocket non-molding region 1n. In addition, although the example which forms the recessed part in the mutually opposing surface of the upstream upper cooling plate 121 and the upstream lower cooling plate 122 here as the opening part 123 is shown here, an upstream upper cooling plate is located in the position of the opening part 123. A through-hole penetrating each of 121 and the upstream lower cooling plate 122 may be provided.

  A plurality of openings 123 are provided in the conveyance direction of the sheet 1 corresponding to the pocket portion forming scheduled region 1p, and the area thereof is gradually increased in the upstream direction. Here, as an example, a plurality of openings 123 (four in the figure) are arranged in the width W direction of the sheet 1 and a plurality (three in the figure) are arranged in the longitudinal direction (conveying direction). The The area of the plurality of openings 123 increases stepwise from the downstream side toward the upstream side. Further, the openings 123 adjacent along the longitudinal direction (conveying direction) of the sheet 1 are arranged so as to be substantially radial with respect to the downstream end of the upstream cooling device 12. The arrangement pattern between the openings 123 will be described later.

  The pocket forming device 13 is provided downstream of the upstream cooling device 12 and separated from the upstream cooling device 12, and forms the pocket portion 1 a in the sheet 1. That is, the pocket molding apparatus 13 includes a plurality of convex auxiliary molding apparatuses, an upper mold 131 having a molding pressure air path, and a lower mold 132 having a plurality of concave portions meshing with the convex portions. The lower mold 132 is movable in the vertical direction by a piston (not shown). The vertical movement range at the time of molding is, for example, about −0.35 mm to 30 mm. Note that the vertical movement range here is based on the position in contact with the sheet 1 as a reference (0). That is, the operable range until contact with the sheet 1 (below the sheet 1 in the figure) is 30 mm, and after the contact with the sheet 1, it is possible to operate 0.35 mm further upward. Instead of the piston, a servo motor-driven link mechanism or cam drive may be used. Further, the molding air passing through the molding pressure air path flows in, for example, from one end of the upper mold 131 in the sheet width direction and is exhausted from the lower mold 132.

  The convex part of the upper mold 131 and the concave part of the lower mold 132 are provided in the same number as the number of the opening parts 123, and the positions thereof are formed as pocket parts when the sheet 1 cooled by the upstream cooling device 12 moves. It is arranged at a position corresponding to the planned area 1p. As described above, the pocket part forming scheduled region 1p of the sheet 1 is not cooled by the upstream cooling device 12 and is maintained in a softened state. Therefore, the sheet partially softened by the upper mold 131 and the lower mold 132. A concave pocket portion 1a is formed by sandwiching 1 from above and below and applying a positive pressure after auxiliary molding by a convex portion.

  Further, a downstream cooling device 14 is provided downstream of the pocket forming device 13 so as to be separated from the pocket forming device 13. The downstream cooling device 14 includes an upper guide cooling unit 141 and a lower pocket guide cooling unit 142, and cools the sheet 1 by sandwiching it from above and below.

  The upstream cooling device 12 will be further described with reference to FIG. This figure is a side view of the upstream cooling device 12 with the upstream upper cooling plate 121 and its vicinity extracted. Although illustration and description are omitted, the configuration of the upstream lower cooling plate 122 is the same as that of the upstream upper cooling plate 121 except that the moving direction is reversed.

  As shown in FIG. 5A, when the sheet 1 is conveyed, the upstream upper cooling plate support 181 is retracted away from the sheet 1 by an air cylinder (not shown here). Further, the upstream upper cooling plate 121 engaged therewith by the slide bush 19 is retracted so as to be separated from the seat 1. The pressing member 20 is, for example, a coil spring 20. In this state, the pressing member 20 is in an extended state due to its own weight with the coil spring 20 of the upstream upper cooling plate 121.

  As shown in FIG. 5B, when the seat 1 is cooled, an air cylinder (not shown) protrudes toward the seat 1, thereby causing the upstream upper cooling plate support 181 to move downward and simultaneously. The upstream upper cooling plate 121 is in close contact with the upper surface of the sheet 1. At this time, the coil spring 20 improves the adhesion between the upstream upper cooling plate 121 and the upstream lower cooling plate 122 and the sheet 1, and the upstream upper cooling plate with an appropriate biasing force so as not to press the sheet 1 more than necessary. 121 and the upstream lower cooling plate 122 are pressurized. Thereby, the sheet 1 is cooled except for the region of the opening 123.

  The coil spring 20 has an appropriate biasing force so as to enhance the adhesion with the sheet 1 and not to prevent the sheet 1 from contracting due to excessive pressing. As long as an appropriate pressing force can be applied to the upstream upper cooling plate 121 and the upstream lower cooling plate 122 as described above, a structure other than the coil spring 20 may be used.

  Further, at least the surface of the upstream upper cooling plate 121 and the upstream lower cooling plate 122 facing the sheet 1 has a high thermal conductivity, a low surface friction coefficient, and a material to which the heated sheet 1 (resin) is difficult to adhere. It is desirable to do. As an example, the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are made of metal or the like whose surface is treated with anodized impregnated with a fluororesin (Teflon (registered trademark), etc.) (Tafram (registered trademark)). It is preferable to use a plate-like member. Further, a coating material in which a resin adhesion inhibitor is mixed into a material having a high thermal conductivity and a low friction coefficient may be applied to a plate-like member such as metal.

  By doing so, the upstream upper cooling plate 121 and the upstream lower cooling plate 122 can be quickly separated from the sheet 1 even when the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are retracted up and down after being cooled in close contact with the sheet 1.

  With reference to FIG. 3, the sheet | seat 1 manufactured with the PTP sheet manufacturing apparatus 10 of this embodiment is demonstrated.

  The sheet 1 is a resin sheet such as a PP film or a PVC film, for example, and has a plurality of pocket portions 1a that accommodates articles to be packaged (for example, tablets) and is arranged in a matrix. For example, the sheet 1 constitutes a PTP package, and illustration thereof is omitted. However, in another process, an object to be packaged is stored in the pocket portion 1a, and an upper sheet separate from the sheet 1 is provided. The object to be packaged is packaged by pressure bonding to the sheet 1.

  In the pocket portion 1a, the shape of the planar region of the pocket portion 1a is substantially circular in a top view, and a convex storage region is formed below. Although the region other than the pocket portion 1a may not be strictly a plane, it is hereinafter referred to as a plane portion 1f as a region that is not convexly shaped. That is, the sheet 1 includes a pocket portion 1a and a flat portion 1f. A plurality of pocket portions 1a are arranged in a matrix. The pocket portion 1a is divided into a plurality of blocks B (shown by broken lines), and the pocket portions 1a of one block B are formed at the same time. That is, the upstream cooling device 12 and the pocket forming device 13 are processed intermittently in units of the block B. In addition, the arrangement | positioning of the pocket part 1a and the number in one block B are not restricted to the example of illustration.

  Next, a method for manufacturing the sheet 1 by the PTP sheet manufacturing apparatus 10 will be described with reference to FIGS. The material of the sheet 1 will be described as a PP film.

  In the PTP sheet manufacturing apparatus 10, the sheet 1 does not contact any of the heating device 11, the upstream cooling device 12, the pocket forming device 13, and the downstream cooling device 14 when the sheet 1 is conveyed. Then, in each step of heating by the heating device 11, cooling by the upstream cooling device 12 (first cooling), molding by the pocket forming device 13, and cooling by the downstream cooling device 14 (second cooling), the movement of the sheet 1 is temporarily performed. Stop.

  The heating device 11 heats the sheet 1 with the upper heating plate 111 and the lower heating plate 112 facing each other so as to be close to the sheet 1. Thereby, the entire surface of the sheet 1 sandwiched between the upper heating plate 111 and the lower heating plate 112 is softened.

  Then, the heated and expanded sheet 1 moves to the upstream cooling device 12 and is tightly sandwiched between the upstream upper cooling plate 121 and the upstream lower cooling plate 122, thereby allowing the pocket portion forming scheduled region 1p and the error tolerance. Only the pocket non-molding region 1n is cooled, leaving a region in the vicinity thereof within the range. The pocket portion non-molding region 1n is a flat portion 1f shown in FIG. This promotes hardening by temperature drop (rapid cooling) of the PP film, and fixes the shape of the pocket part non-molding region 1n (hereinafter referred to as the flat part 1f). The cooling temperature is about 18 ° C., for example.

  As described above, the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are urged by the coil spring 20 having an appropriate pressing force. As a result, the planar portion 1 f of the sheet 1 contracts while being appropriately pressed by the upstream upper cooling plate 121 and the upstream lower cooling plate 122. At this time, the opposing surfaces of the upstream upper cooling plate 121 and the upstream lower cooling plate 122 have a low coefficient of surface friction and are difficult to adhere the heated sheet 1 (resin). Does not interfere with the contraction.

  After cooling (after contraction of the seat 1), the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are retracted vertically. Also in this case, at least the surfaces of the upstream upper cooling plate 121 and the upstream lower cooling plate 122 have a high thermal conductivity, a low surface friction coefficient, and a configuration in which the heated sheet 1 (resin) is difficult to adhere. Therefore, even when the upstream upper cooling plate 121 and the upstream lower cooling plate 122 are retracted up and down after being in close contact with the sheet 1 and cooled, they can be quickly separated from the sheet 1. The upstream upper cooling plate 121 and the upstream lower cooling plate 122 may be cooled by being brought close to the sheet 1.

  The pocket part non-molding region 1n shrinks and cures by cooling, but the pocket part molding scheduled region 1p moves to the pocket forming device 13 while being cooled and partially cooled while being softened by heating. The pocket portion 1a of one block B is formed by the upper die 131 and the lower die 132. That is, the sheet 1 moves intermittently for each length (for example, the length L of the block B shown in FIG. 3) sufficient to form the pocket portion 1a in the block B unit in the pocket forming apparatus 13. Thereafter, at least the pocket portion 1a is cooled by the downstream cooling device 14 further downstream. Here, the pocket part 1a including the flat part 1f may be cooled, or only the pocket part 1a may be cooled. As a result, the curing of the resin material (PP or PVC or the like) by the temperature drop (rapid cooling) is promoted, and the shape of the pocket portion 1a is fixed. The cooling temperature here is about 18 ° C., for example.

  In addition, although illustration is abbreviate | omitted, when employ | adopting said PTP sheet manufacturing apparatus 10 for a PTP packaging apparatus, for example in the molded pocket part downstream (after process) of PTP sheet manufacturing apparatus 10 (for example, tablet) ), A lid sheet feeding device that feeds a lid sheet (for example, an aluminum sheet) on the sheet 1 supplied with the packaging material, and the sheet 1 and the lid sheet facing each other A sealing device that seals and integrates a predetermined portion to be closed and closes a space formed by the pocket portion, a cutter device that cuts a predetermined position sealed by the sealing device, and the like are provided.

  Next, an example of the shape and arrangement pattern of the opening 123 of the upstream cooling device 12 will be described in detail with reference to FIG. This figure is a top view showing only a region that is half of the center line L1 along the length direction (conveyance direction) of the sheet 1. In FIG. 4, the lower side of the drawing is the center line and the upper side is the end. In addition, in the drawing, in order to explain the shape and arrangement pattern of the opening 123, the non-cooling region NC corresponding to each opening 123 is illustrated. The position of the non-cooling region NC is a position facing the opening 123. That is, the opening 123 of the upstream cooling device 12 is provided in the arrangement, shape, and size of each non-cooling region NC shown in FIG. Further, for the convenience of explanation, scales such as a contraction amount are exaggerated.

  Lines P1, P2, and P3 in the figure correspond to lines P1, P2, and P3 in FIG. 1B, respectively. The line P <b> 1 is a downstream end portion of the heating device 11, and the upstream (left side in the drawing) from the line P <b> 1 is a heating region 21 by the heating device 11. The line P2 is the downstream end of the upstream cooling device 12 (the upstream upper cooling plate 121 and the upstream lower cooling plate 122), and the area from the line P2 to the line P1 is an upstream cooling region 22 by the upstream cooling device 12. is there. Further, the line P3 is a downstream end portion of the pocket forming device 13, and a portion between the line P2 and the line P3 is a pocket forming region 23 by the pocket forming device 13. The pocket forming region 23 includes a plurality of (here, six) pocket portion forming scheduled regions 1p (or a completed pocket portion 1a (hereinafter, the same as in FIG. 4)). Further, two-dot chain lines L2 and L3 along the length direction of the sheet 1 are virtual lines (pocket center lines L2 and L3) connecting the center points of the pocket portion forming scheduled regions 1p arranged in the length direction of the sheet 1. . The pocket center lines L2 and L3 are both substantially parallel to the center line L1 of the sheet 1, and the distance a2 between the pocket center lines L2 and L3 is substantially constant. A line L5 indicates the position of the end portion of the sheet 1 before contraction, and a line L4 indicates the position of the end portion of the sheet 1 after contraction.

  Further, the pocket portion forming scheduled region 1p is arranged at a substantially constant distance a3 in the length direction of the sheet 1 as well.

  In the present embodiment, in the heating area 22, the non-cooling area NC (NC13 to NC11, NC16 to NC14, or NC23 to NC21, NC26 to NC24) is gradually increased from the downstream side to the upstream side. The opening 123 of the upstream cooling device 12 is provided. This will be described in more detail below.

  As already described, the sheet 1 heated in the heating region 21 contracts by being cooled in the cooling region 22. In the sheet 1, the width Wa contracts to the width Wb, and the length La contracts to the length Lb. 4, the length direction is a region from the line P2 that is the downstream end of the cooling region 22 to the line P1 that is the upstream end, and the width direction is the end of the sheet 1 from the center line L1. This is the area up to the section (line L5). Note that the end portion of the sheet 1 in the heating region 22 adjacent to the line P1 is slightly pulled from the line L5 to the line L4 as shown by hatching in FIG.

  At this time, the total contraction amount in the width direction is Xa and the total contraction amount in the length direction is Ya, but the width direction and the length direction are not contracted uniformly, but the line P2 and the center line L1 The amount of contraction increases in proportion to the distance from. That is, in the length direction of the sheet 1, the contraction amount is small in the portion close to the line P2, and the contraction amount increases as the distance from the line P2 increases. Further, in the width direction of the sheet 1, the shrinkage amount is small in the portion near the center line L <b> 1, and the shrinkage amount increases as the distance from the center line L <b> 1 increases. As a whole of the cooling region 22, the contraction in the length direction and the width direction is synthesized, and the contraction amount increases as the distance from the intersection is increased based on the intersection (reference point B 0) of the line P 2 and the center line L 1. Become.

  Specifically, description will be made using virtual points V1, V2, V3, V4, V5, and V6 on the cooling region 22. The imaginary points V1 to V6 are the center points of the pocket portion forming scheduled region 1p in consideration of the shrinkage, that is, before shrinkage. That is, in the same figure, in the cooling region 22, the pocket portion forming planned region 1p at the pre-contraction position BP1 is moved to the post-contraction position AP1 by contracting the periphery thereof, and the virtual point V1 is contracted. This is the center point of the front position BP1. Further, the post-shrinkage position AP1 is a position of an appropriate pocket portion forming scheduled area 1p in the cooling area 23. The same applies to the virtual points V2 to V6, which are the center points of the pre-contraction positions BP2 to BP6, respectively. And the pocket part shaping | molding planned area | region 1p in the position BP2-BP6 before shrinkage shall move to the position AP2-AP6 after shrinkage, respectively, when the circumference | surroundings shrink | contract. Further, in the figure, for convenience of explanation, the state of contraction (the direction of contraction and the amount of contraction) at the respective virtual points V1 to V6 is displayed above the pre-contraction positions BP1 to BP6.

  The distance from the center line L1 is a virtual point V3 = V2 = V1 <V6 = V5 = V4. The distance from the line P2 is a virtual point V3 = V6 <V2 = V5 <V1 = V4. In the virtual point V1, the contraction amount in the width direction (the contraction amount toward the center line L1, hereinafter the same) is Xa1, and the contraction amount in the length direction (the contraction amount toward the line P2, hereinafter the same) is Ya1. This causes a contraction of the magnitude of the vector Va1 in the direction indicated by the vector Va1. Similarly, the virtual point V2 has a contraction amount in the width direction of Xa2, a contraction amount in the length direction of Ya2, and contraction indicated by the vector Va2. The virtual point V3 has a contraction amount in the width direction of Xa3, a contraction amount in the length direction of Ya3, and contraction indicated by the vector Va3. In the virtual point V4, the contraction amount in the width direction is Xa4, the contraction amount in the length direction is Ya4, and the contraction indicated by the vector Va4 occurs. In the virtual point V5, the contraction amount in the width direction is Xa5, the contraction amount in the length direction is Ya5, and the contraction indicated by the vector Va5 occurs. The virtual point V6 has a contraction amount in the width direction of Xa6, a contraction amount in the length direction of Ya6, and contraction indicated by the vector Va6.

  In this case, when comparing the shrinkage amounts in the width direction, the closer to the center line L1, the smaller the shrinkage amount. Therefore, the shrinkage amount Xa1 <Xa4, the shrinkage amount Xa2 <Xa5, and the shrinkage amount Xa3 <Xa6. Further, the shrinkage amount Xa1 = Xa2 = Xa3, and the shrinkage amount Xa4 = Xa5 = Xa6.

  Further, when comparing the shrinkage amounts in the length direction, the closer to the line P2, the smaller the shrinkage amount, so that the shrinkage amount Ya1> Ya2> Ya3 and the shrinkage amount Ya4> Ya5> Ya6. Further, the shrinkage amount Ya1 = Ya4, the shrinkage amount Ya2 = Ya5, and the shrinkage amount Ya3 = Ya6.

  That is, as the overall contraction amount of the virtual points V1 to V6, the contraction amount Va1> Va2> Va3, the contraction amount Va4> Va5> Va6, the contraction amount Va1 <Va4, the contraction amount Va2 <Va5, and the contraction amount Va3. <Va6, and the amount of contraction Va increases as the distance from the intersection of the line P2 and the center line L1, that is, the reference point 0 that hardly causes contraction, increases. As an example, assuming that the distance from the reference point B0 is a virtual point V4> V1> V5> V2> V6> V3, the total contraction amount is such that the contraction amount Va4> Va1> Va5> Va2> Va6> Va3. .

  Therefore, in the cooling region 22, it is necessary to secure the non-cooling regions NC11 to NC16 in consideration of the shrinkage amounts corresponding to the respective positions of the six pocket portion forming scheduled regions 1p. Specifically, the non-cooling region NC11 is secured so as to allow the pocket portion forming planned region 1p to change from the pre-contraction position BP1 to the post-contraction position AP1 (in consideration of this change amount). That is, as shown in the figure, the non-cooling region NC11 is secured in a substantially oval (substantially oval) shape including the pre-shrinkage position BP1 and the post-shrinkage position AP1 of the pocket portion molding scheduled region 1p. Corresponding to this is provided with an opening 123 corresponding thereto. In the figure, the sizes of the broken lines indicating the pre-contraction position BP1 and the post-contraction position AP1 are equally shown, but actually this size also changes (the pre-contraction position BP1 has a larger area than the post-contraction position AP1. Become).

  Similarly, the non-cooling region NC12 includes the pre-contraction position BP2 and the post-contraction position AP2 of the pocket portion molding scheduled region 1p, and the non-cooling region NC13 includes the pre-contraction position BP3 and the post-contraction position AP3. The non-cooling region NC14 includes a pre-contraction position BP4 and a post-contraction position AP4, the non-cooling region NC15 includes a pre-contraction position BP5 and a post-contraction position AP5, and the non-cooling region NC16 includes a pre-contraction position BP6. And the post-shrinkage position AP6 are each secured in a substantially oval (substantially oval) shape, and an opening 123 is provided corresponding to each.

  As a result, the non-cooling regions NC11 to NC16 and the corresponding openings 123 are formed from the downstream side toward the upstream side as shown in the figure (the base point B1 that is the intersection of the pocket center line L3 and the line P2, and the pockets). It is provided so that its area increases stepwise (as it is farther from the base point B2 that is the intersection of the center line L2 and the line P2). Moreover, it is provided so that the area increases as the distance from the base point B0 increases.

  Here, as an example, the distances from the reference point B0 are virtual points V3 <V6 <V2 <V5 <V1 <V4, and the areas SNC11, SNC12, SNC13, SNC14, SNC15, and SNC16 of the non-cooling regions NC11 to NC16 are , SNC13 <SNC16 <SNC12 <SNC15 <SNC11 <SNC14 is shown, but at least SNC13 <SNC12 <SNC11 with reference to the base point B1, and SNC16 <SNC15 <SNC14 with reference to the base point B2. A portion 123 is provided.

  As a result, the area of the opening 123 (non-cooling regions NC11 to NC16) gradually increases in the upstream direction of the sheet 1. Further, the distance between the openings 123 adjacent in the width direction of the sheet 1 becomes narrower from the downstream to the upstream (distance between the non-cooling regions NC13 and NC16> distance between NC12 and NC15> between NC11 and NC14. distance). Further, in this example, the openings 123 (non-cooling regions NC11 to NC16) adjacent along the length direction (conveying direction) of the sheet 1 are arranged so as to spread substantially radially with reference to the line P2 (FIG. 1). FIG. 4).

  In addition, the shape of each opening part 123 (non-cooling area | region NC) is not restricted to an ellipse shape like illustration, It is a shape which can include pre-contraction position BP (BP1-BP6) and post-contraction position AP (AP1-AP6). As long as it is present, it may be a perfect circle (or a shape close to a perfect circle) like NC21 to NC26 shown in the figure, or may be an elliptical shape. Further, since the sheet 1 conveyed to the upstream cooling device 12 is intermittently fed, the upstream side depends on, for example, the feeding speed of the sheet 1 or the dimension of the cooling plate in the length direction of the sheet 1 in the upstream cooling device 12. A temperature difference is generated so that the temperature is higher than that on the downstream side. For this reason, when each opening part 123 is made into a perfect circle or an ellipse shape, the opening part 123 is arranged so that the interval between the adjacent opening parts 123 in the width direction gradually increases from the downstream side toward the upstream side. The portions 123 may be arranged radially with BO as a base point.

  In the half region (the lower half of the figure) that is not shown, the base point of the change amount is the line P2, the center line L1, and the base point B0 as in the case described above, and the change amount (deformation) state is the center. The state described above is axisymmetric with respect to the line L1. That is, in FIG. 4, the overall contraction change is represented by a vector from the upper left to the lower right, but in the half area not shown, the overall contraction change is represented by a vector from the lower left to the upper right. As the opening 123 moves away from the base point B0, the amount of contraction increases.

  By setting the pattern (position, shape, and size) of the opening 123 in this way, the position of the pocket portion forming planned region 1p (or the completed pocket portion 1a) after cooling in the cooling region 23 is the same. Appropriate positions can be achieved as shown. The shape of the opening 123 (non-cooling region NC) may be any shape as long as it can contain the pre-contraction position BP (BP1 to BP6) and the post-contraction position AP (AP1 to AP6), and is denoted by reference numerals NC11 to NC16 in the same figure. Thus, it is not limited to an oval shape. For example, as indicated by reference numerals NC21 to NC26 in FIG.

  Furthermore, the shape of the opening 123 (non-cooling region NC) may be an elliptical pattern in consideration of the direction of shrinkage described above. Specifically, the opening 123 may be elliptical and arranged so that its long axis is substantially parallel to the contraction direction of the solid arrow.

  In these cases as well, the size is preferably increased from downstream to upstream. Further, the major axis of the ellipse may be arranged so as to spread radially from the point P2 and the center line L1 of the sheet 1 (inclined from the center line L1).

  As described above, according to the PTP sheet manufacturing apparatus 10 of the present embodiment, before forming the pocket portion 1a, only the region where the pocket portion 1a is not formed (the region that becomes the flat portion 1f) is formed by the upstream cooling device 12. Shrinkage is promoted by cooling, and the process moves to the molding process by the pocket molding apparatus 13 in a state where the surrounding shrinkage has progressed. Accordingly, the shrinkage of the flat portion 1f after the pocket portion 1a molding apparatus 13 can be suppressed, and the curling of the sheet 1 due to the residual stress around the pocket portion 1a can be prevented.

  Further, since the position of the opening 123 of the upstream cooling device 12 (the distance between the openings 123 arranged in the width direction of the sheet 1) is increased from the downstream side toward the upstream side, the downstream side in the length direction of the sheet 1 is increased. Even if the state of contraction is not uniform due to the difference in state between the side and the upstream side, the position of the pocket portion forming scheduled region 1p after contraction can be arranged substantially uniformly.

  Further, since it is not necessary to consider the shrinkage after forming the pocket portion 1a, the number of pocket forming regions 23 (area for one block B that can be formed at one time) and the number of pocket portions 1a in the pocket forming device 13 are increased. be able to. For example, if the conventional pocket forming region 23 has a length in the length direction of the sheet 1 of 300 mm and a length in the width direction of the sheet 1 of 300 mm, the sheet 1 contracts by 2%, resulting in a shift of 6 mm. For this reason, when the molded pocket portion 1a is taken out, there is a problem that the pocket portion 1a is crushed and deformed by the mold, and there is a limit to the number of rows of the pocket portions 1a that can be formed in one molding process. However, according to the present embodiment, the pocket portion 1a is formed in a state where the flat portion 1f is contracted, so that the size of the pocket forming region 23 can be increased. As a result, the number of pocket portions 1a (pocket portion forming scheduled region 1p) that can be formed in a single forming step can be increased, thereby significantly improving productivity.

  Further, even if the material of the sheet 1 is a PP film, the shrinkage after forming the pocket portion 1a hardly occurs. Therefore, the upper die 131 and the lower die 132 for forming the pocket portion 1a are also 1% to There is no need to increase it by 2%. Therefore, when using the sheet 1 of the PVC film that essentially does not shrink after heating, the common upper mold 131 and lower mold 132 can be used, and the productivity is improved by eliminating the need for parts replacement. Can contribute.

  In addition, by heating the entire surface of the sheet 1 in the heating device 11, it is possible to eliminate the need to replace parts of the heating device 11 even if the size or arrangement of the pocket portion 1 a is changed.

  In addition, when there is a change in the size or arrangement of the pocket portion 1a due to a change in the product or the like, the arrangement and shape of the opening 123 are changed in the upstream cooling device 12, so that parts must be replaced. However, for example, compared to the conventional structure in which heating for multiple stages is repeated and only the pocket molded part is partially heated, it is not necessary to replace the heating plate for multiple stages, so the replacement parts are also lighter and easier to handle. Will also be easier.

Second Embodiment
FIG. 5 is a view showing the PTP manufacturing apparatus 30 of the second embodiment, and is a side view corresponding to FIGS. 1 (A) and 2. In addition, the same component as 1st Embodiment is shown with the same code | symbol, and description is abbreviate | omitted.

  The upper heating plate 111 ′ of the heating device 11 ′ of the second embodiment includes auxiliary heating means 200 that protrudes downward from the upstream upper cooling plate support 181 located at the end thereof. The auxiliary heating means is a heating means (partial heating body 200) for partially heating the sheet 1, for example. The upstream upper cooling plate 125 of the upstream cooling device 12 ′ has a through hole 124 through which the partial heating body 200 can pass. In this case, the open end of the through hole 124 on the sheet 1 side is the opening 123 similar to that of the first embodiment. Other configurations of the upstream upper cooling plate 125 are the same as those of the upstream upper cooling plate 121 of the first embodiment. In this case, at least the partial heating body 200 is a heating means similar to the upper heating plate 111. The upstream upper cooling plate support 181 may also be a heating means.

  The partial heating body 200 is thermally insulated and separated from the upstream upper cooling plate 121 (side surface of the opening 123) without contact, and is fixed to the upstream upper cooling plate support 181. When the sheet 1 is conveyed, the partial heating body 200 retracts upward in the through hole 124 of the upstream upper cooling plate 125 and does not contact the sheet 1. The configuration of the lower heating plate 112 ′ and the upstream lower cooling plate 126 of the heating device 11 ′ is the same as that of the upper heating plate 111 ′ and the upstream upper cooling plate 125, respectively.

  When the sheet 1 heated by the heating device 11 ′ enters the upstream cooling device 12 ′, the upstream upper cooling plate 125 and the upstream lower cooling plate 126 are close to each other and are in close contact with the sheet 1 as in the first embodiment. This is cooled by pressing with an urging force, and the contraction of the flat portion 1f is promoted.

  When the upstream upper cooling plate 125 and the upstream lower cooling plate 126 are in close contact with and press the sheet 1, the partial heating body 200 descends in the through hole 124 due to the contraction of the coil spring 20, and the pocket portion of the sheet 1. Proximity to the forming region 1p. Even when the partially heated body 200 is closest to the sheet 1, it does not protrude downward from the opening 123 of the upstream upper cooling plate 121. Thus, the cooling device 12 cools the region to be the flat portion 1f of the sheet 1 to promote shrinkage, suppresses the temperature drop of the pocket portion molding scheduled region 1p, and softens the pocket portion molding planned region 1p suitable for molding. Can be maintained in a state.

  Regarding the shape of the partial heating body 200 and the size and arrangement pattern of the through holes 124 (openings 123), the shape change due to the shrinkage of the PP film is the same as that of the first embodiment in the case of the second embodiment. However, in this embodiment, it is further desirable to design in consideration of the amount of shrinkage change of the PP film and the heat loss caused by cooling the surroundings.

  In addition, it is desirable that the length is selected so that the partial heating body 200 comes close to the sheet 1 in a state where the cooling by the upstream upper cooling plate 125 and the upstream lower cooling plate 126 (contraction of the sheet 1) has progressed to some extent. .

  The partial heating body 200 may be provided on either the upper heating plate 111 ′ or the lower heating plate 112 ′.

  Although not shown, the heating device 11 is for heating the entire surface of the sheet 1. However, instead of this, a partial heating device is provided, and only the pocket forming area 1 p is partially heated in the heating region. It is good also as a structure. In this case, the upstream upper cooling plate 125 and the upstream lower cooling plate 126 cool the pocket portion non-forming region 1n around the pocket portion forming planned region 1p heated by the radiant heat (heat radiation) of the partial heating body 200.

<Third Embodiment>
FIG. 6 is a view showing the third embodiment and a side view of the PTP manufacturing apparatus 32. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Although the upstream cooling device 12 of 1st Embodiment was the structure provided in the space part provided in the downstream edge part of the heating apparatus 11, it is not restricted to this, As shown in the figure, heating apparatus 11 ''And the upstream cooling device 12''may be configured separately.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and technical idea thereof.

  For example, the number and arrangement of the openings 123 of the cooling device 12 are not limited to those illustrated in the drawings.

  Further, the downstream cooling device 14 may not be provided.

  Further, the shape of the opening 123 may not be a shape (circular or elliptical) that approximates the pocket portion 1a, and may be, for example, a rectangular shape. Further, the upstream upper cooling plates 121 and 125 and the upstream lower cooling plates 122 and 126 may be provided in a frame shape that collectively surrounds the pocket portion forming scheduled region 1p included in one block B.

  Moreover, you may provide the guide member which controls the meandering of the width direction when the sheet | seat 1 is softened. For example, the guide member may be provided on the side of the PTP sheet manufacturing apparatus 10 at both ends in the sheet width direction.

DESCRIPTION OF SYMBOLS 1 Sheet 1a Pocket part 10 PTP sheet manufacturing apparatus 11 Heating device 111 Upper heating plate 112 Lower heating plate 12 Upstream cooling device 121 Upstream upper cooling plate 122 Upstream lower cooling plate 13 Pocket forming device 131 Upper mold 132 Lower mold

Claims (8)

A PTP sheet manufacturing apparatus for forming a plurality of pocket portions in a belt-shaped sheet to be conveyed,
A heating unit that is provided on a conveyance path of the sheet and that heats a region including the first region of the sheet;
A cooling unit that is provided on a conveyance path downstream of the heating unit and that cools a region other than the first region of the sheet;
Provided on a transport path downstream of the cooling means, and forming means for forming the pocket portion in the first region,
A PTP sheet manufacturing apparatus. The cooling means includes a cooling surface in contact with or close to the sheet, and an opening is provided at a position corresponding to the first region of the cooling surface, and the opening corresponds to the first region. A plurality of the sheet in the conveying direction and the area of the opening gradually increases toward the upstream direction,
The apparatus for producing a PTP sheet according to claim 1. The cooling means includes a pressing member, and the pressing member presses the cooling surface so as not to prevent contraction of the sheet while enhancing adhesion to the sheet.
The PTP sheet manufacturing apparatus according to claim 1, wherein the apparatus is a PTP sheet manufacturing apparatus. The heating means heats the entire surface of the sheet;
The PTP sheet manufacturing apparatus according to claim 1, wherein the apparatus is a PTP sheet manufacturing apparatus. An auxiliary heating means capable of projecting from the opening of the cooling means,
The PTP sheet manufacturing apparatus according to any one of claims 2 to 4, wherein the apparatus is a PTP sheet manufacturing apparatus. Other cooling means for cooling at least the first region downstream of the forming means,
The PTP sheet manufacturing apparatus according to any one of claims 1 to 5, wherein: A PTP sheet manufacturing method for forming a plurality of pocket portions in a belt-shaped sheet to be conveyed,
Heating a region including a first region of the sheet by a heating unit on the conveyance path of the sheet;
Cooling a region other than the first region of the sheet by a cooling unit on a conveyance path downstream of the heating unit;
Forming the pocket portion in the first region by the forming means on the conveyance path downstream of the cooling means,
A method for producing a PTP sheet. The cooling means cools the sheet in close contact with or in proximity to the heated sheet.
The method for producing a PTP sheet according to claim 7.

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