JP4121015B2 - Film supply apparatus, PTP sheet manufacturing apparatus, and film supply method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film supply apparatus capable of continuously supplying a film, a PTP sheet manufacturing apparatus including the film supply apparatus, and the like.
[0002]
[Prior art]
Generally, a PTP sheet (blister sheet) is made of, for example, PP (polypropylene), a packaging film having a plurality of pocket portions, and an aluminum cover film attached to the packaging film so as to close the pocket portions. And have. Each pocket contains a tablet or the like.
[0003]
Such a PTP sheet is manufactured by a dedicated manufacturing apparatus, but various processes such as forming a pocket part, storing a tablet, sticking a cover film, punching a sheet, etc. on a belt-shaped packaging film Will be made sequentially. Therefore, on the most upstream side of such a manufacturing apparatus, a mechanism for continuously supplying a strip-shaped packaging film is required.
[0004]
On the most upstream side of the manufacturing apparatus, a strip-shaped packaging film is wound in a roll shape, and the feeding end side is guided to a pocket part forming apparatus comprising heating means and pocket forming means through a film supply part. It has come to be.
[0005]
Specifically, as shown in FIG. 7A, this part of the manufacturing apparatus includes roll films 91 and 93, an automatic film splicing device 110, a feeding motor 111, a heating means 120, a pocket forming means 130, A step roller 140 is provided. Here, the automatic film splicing device 110, the feeding motor 111, and the step roller 140 correspond to the above-described film supply unit.
[0006]
In the film supply unit having such a configuration, as shown in FIG. 7A, the film 92 is fed out from one roll film 91 by the feeding motor 111, and the film 92 is transferred to the heating unit 120 and the pocket forming unit 130. invite. And when one roll film 91 disappears as shown in FIG.7 (b), the termination | terminus (part shown by the symbol E) of the film 92 unwound from one roll film 91 by the automatic film splicing apparatus 110, The start end (portion indicated by symbol S) of the film 94 fed out from the other roll film 93 is connected using an adhesive tape or the like.
[0007]
However, the connection of the films 92 and 94 by the automatic film splicing device 110 requires time such as several tens of seconds. Therefore, in the state of FIG. 7B, the feeding operation of the film 92 indicated by the symbol P is stopped by stopping the feeding motor 111. At this time, the step roller 140 is a mechanism for preventing the supply operation of the film 92 to the downstream side of the heating means 120 and the pocket forming means 130 and other manufacturing apparatuses, that is, the supply operation indicated by the symbol Q.
[0008]
The step roller 140 includes a plurality of rollers 141 and 142 that are spaced apart in the vertical direction. Specifically, it includes three fixed rollers 141 positioned relatively above and two moving rollers 142 positioned relatively below. The fixed roller 141 is fixedly supported at a predetermined position, while the moving roller 142 is supported so as to be movable in the vertical direction and is biased downward. The film 92 is alternately wound around the fixed roller 141 and the moving roller 142 and transferred.
[0009]
In a normal state, as shown in FIG. 7A, the fixed roller 141 and the moving roller 142 are arranged apart from each other in the vertical direction, so that the film 92 and the film 94 are connected to the step roller 140. The film 92 is stored so that the supply operation indicated by the symbol Q can be continued only for the time required for the operation. At this time, the moving roller 142 is controlled to be in a predetermined range in the vertical direction so that the amount of film fed by the feeding motor 111 is equal to the amount of film supplied to the downstream side. Specifically, the feeding motor 111 is controlled so that the moving roller 142 is in the vertical position defined by the sensors 143 and 144.
[0010]
On the other hand, when the film is connected, as shown in FIG. 7B, the control of the feeding motor 111 based on the sensors 143 and 144 is stopped and the feeding motor 111 is stopped. As a result, the film feed amount becomes “0”, but the film supply amount to the downstream side does not change, so the moving roller 142 moves upward, and the film 92 stored on the step roller 140 moves to the downstream side. Supply is covered.
[0011]
[Problems to be solved by the invention]
However, when the control using the step roller 140 as described above is performed, the film supply unit is increased in size due to the configuration of the step roller 140, and as a result, the manufacturing apparatus is increased in size.
[0012]
The present invention has been made in view of the above circumstances, and an object thereof is to enable continuous supply of a film without using a step roller and to reduce the size of the apparatus.
[0013]
[Means for Solving the Problems and Effects of the Invention]
Characteristic means that can achieve the above-described object will be described below. For each means, characteristic actions and effects are described as necessary.
[0014]
  Means 1.A pocket part forming apparatus comprising a pocket forming means for forming a pocket part, with respect to a heating means for partially heating a packaging film made of a thermoplastic resin material and a packaging film made flexible by heating of the heating means,
A tablet loading device for filling the pocket with tablets;
A heating means and a film receiving roll, and after the tablet filling, a sticking means for sticking a cover film to the packaging film by heating and pressing to form a PTP film;
A sheet punching device for punching the PTP film in units of PTP sheets;
  Continuously roll-shaped packaging film from roll film wound in roll shapeTowards the pocket forming deviceSupplyA PTP sheet manufacturing apparatus comprising a film supply device,
  The film supply device
  A plurality of roll films;
  TheA feeding roller for feeding the film from the roll film;
  SaidControl means for controlling the film feed amount from the roll film;
  When the roll film is consumed, a connection means for connecting the end of the roll film and the start of another roll film is provided.,
  The control means is configured to operate in a connection mode in which the film feeding amount is “0” during the film connection period by the connection means,
  A storage means for storing a film slack portion generated on the downstream side of the connection means so that the film can be supplied even during the film connection period.,
By controlling the film feed amount by the control means, the amount of the film slack portion stored in the storage means can be adjusted,
The control means is configured to be operable in a normal mode for controlling the film feed amount so as to maintain the amount of the film slack portion stored in the storage means,
Comprising a remaining amount detecting means for detecting the remaining amount of the roll film;
When the remaining amount of the roll film based on the remaining amount detecting unit reaches a predetermined amount, the control unit increases the film feeding amount from the normal mode, and supplies the film during the film connection period. When the amount of the film slack portion is generated, the amount of the film slack portion can be supplied, and when the amount of the film slack portion is generated, the normal mode is resumed. When the period ends, the connection mode is configured to shift to the normal mode,
In addition, it comprises a position detection means for detecting the position of the lowermost portion of the film slack portion that hangs down in the vertical direction, and the control means is based on the position detection means in the normal mode immediately before shifting to the accumulation mode. And determining the degree of film slack, and based on the degree of slack of the film slack portion, the film feed amount is configured to be controlled,
Further, a sensor for detecting the rotation speed of the feeding roller is provided, and the control means controls the film feeding amount based on the rotation speed of the feeding roller based on the sensor in the normal mode immediately after shifting from the accumulation mode. Configured toIt is characterized byManufacture of PTP sheetapparatus.
[0015]
In means 1, when the roll film is consumed by the connecting means, the end of the roll film and the start of another roll film are connected. During this film connection period, the control means operates in a connection mode in which the film feed amount is “0”.
[0016]
Here, in particular, according to the means 1, the storage means stores the film slack portion so that the film can be supplied even during the film connection period.
[0017]
That is, instead of using a conventional step roller, the film is loosened and the loosened film is stored in the storage means. Depending on the material of the film, the film slack portion can be stored so as to overlap several times. Since the storing means is compact, the film supply device can be downsized.
[0020]
  The supply amount of the film from the storage means to the downstream side is controlled by a downstream process. Therefore, means1As shown in FIG. 2, it is conceivable that the amount of the film slack portion stored in the storage means can be adjusted by controlling the film feed amount by the control means. As a result, the film can be supplied appropriately during the film connection period.
[0022]
  AlsoSince the control means is operable in the normal mode for maintaining the amount of the film slack portion stored in the storage means, the film is supplied in a state in which the film slack portion of an appropriate amount is stored in the storage means. be able to.
[0024]
  AlsoWhen the control means determines the predetermined timing, the film feeding amount is increased, and the mode shifts to an accumulation mode for generating a film slack portion. The film slack portion generated here is an amount that enables supply of the film during the film connection period.
[0025]
The premise of such a configuration is that at least the amount of film slack that allows the film to be supplied needs to be stored in the storage means at least before the roll film is consumed, and the amount of film slack is always that much. The idea is that the part need not be stored in the storage means.
[0026]
In this regard, in the configuration using the conventional step roller, a predetermined amount of film is always stored in the step roller so that the film can be supplied during the film connection period. In other words, the film feed amount is always controlled while a predetermined amount of film is stored. For this reason, it is necessary to appropriately grasp the amount of accumulated film, and a complicated configuration is required for controlling the film feed amount.
[0027]
  On the other hand, means1According to the above, only when the predetermined timing is determined, a film slack portion sufficient for supply is generated, so that no complicated configuration is required for controlling the film feed amount, and the film supply apparatus can be downsized. it can.
[0029]
  AlsoThe remaining amount detection means detects the remaining amount of the roll film, and the control means determines the predetermined timing based on the remaining amount detection means. Therefore, before the roll film is consumed, an amount of the film slack that can supply the film can be securely stored in the storage means.
[0031]
  The remaining amount detecting means may be configured to always be able to grasp the remaining amount of the roll film itself, but in that case, the configuration may be complicated. This point, means1Since the remaining amount detecting means is configured to determine that the remaining amount of the roll film has reached a predetermined amount, the configuration becomes relatively simple. For example, it can also be configured using a general sensor.
[0033]
  As described above, it is only necessary to store the film slack portion in an amount sufficient to supply the film, and if the generated film slack portion is excessive, the storage means is increased in size. This point, means1According to the above, when the amount of the film slack portion that can supply the film is generated, the mode shifts to the normal mode, that is, the control to maintain the amount of the film slack portion stored in the storage means. The film slack portion does not become excessive, and the storage means can be made compact. As a result, the film supply device can be further reduced in size.
[0035]
As described above, it is conceivable to perform control of normal mode → storage mode → normal mode by the control means.
[0036]
At this time, in the normal mode immediately before the transition to the accumulation mode, the film slack portion stored in the storage means may be a small amount. In other words, even if the film feed amount momentarily falls below the film supply amount, it is sufficient to store a film slack portion that does not affect the film supply amount.
[0037]
  Therefore, means1As shown in FIG. 5, in the normal mode immediately before the transition to the accumulation mode, it is conceivable that the film feeding amount is controlled based on the slackness of the film slack portion. Accordingly, the amount of the film slack portion stored in the storage means can be appropriately maintained, and a stable film supply can be achieved.
[0039]
  AlsoThe position detection means detects the position of the lowermost part of the film slack portion, and the control means determines the slackness based on the position detection means. As a result, the degree of film slack can be determined appropriately, and a stable film can be supplied.
[0041]
  When it is assumed that the control unit performs control of normal mode → accumulation mode → normal mode, in the normal mode immediately after the transition from the accumulation mode, an amount of film slack that allows the film to be supplied during the film connection period Is stored in the storage means. Therefore, means1As shown in FIG.Based on the number of rotations of the feeding roller based on a sensor that detects the number of rotations of the feeding rollerIt can be considered that the film feed amount is controlled.
[0044]
  Alsomeans1As shown in Figure 3, the film supply device is applied to the PTP sheet manufacturing equipment.To doThus, the size of the PTP sheet manufacturing apparatus can be reduced.
[0057]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, a PTP sheet (blister sheet) 1 as a sheet is made of, for example, PP (polypropylene) and includes a packaging film 3 having a plurality of pocket portions 2, and the pocket portion 2 is closed. And an aluminum cover film 4 attached to the packaging film 3. Each pocket portion 2 contains one tablet 5. And such a PTP sheet 1 is manufactured with the dedicated PTP packaging machine 10 (PTP sheet manufacturing apparatus).
[0058]
Then, next, the outline of the PTP packaging machine 10 for manufacturing the PTP sheet 1 is demonstrated based on FIG.
[0059]
The strip-shaped packaging film 3 is wound in a roll shape on the most upstream side. As described above, the packaging film 3 is made of a relatively hard synthetic resin such as PP and has a predetermined rigidity (may be made of other thermoplastic resin material such as PVC), and is transparent or translucent. Presents.
[0060]
The packaging film 3 wound in a roll shape is intermittently transferred, and the heating means 12 and the pocket forming means 13 are arranged in parallel along the transfer path of the packaging film 3. ing. These heating means 12 and pocket forming means 13 constitute a pocket portion forming apparatus 14. Then, in the state where the packaging film 3 is partially heated by the heating means 12 and the packaging film 3 becomes relatively flexible, the pocket portion 2 is formed in the packaging film 3 by the pocket forming means 13. . The pocket portion 2 is formed at an interval between transfer operations of the packaging film 3.
[0061]
Along with the transfer path of the packaging film 3 in which the pocket portion 2 is formed, the tablet loading device 16 that automatically fills the pocket portion 2 with the tablet 5, the inspection device 17 that inspects the presence or absence of foreign matter, and the like, the heating roll 19 A film receiving roll 18 for adhering the cover film 4 is disposed by heating and pressing.
[0062]
Further, an inspection device 21 for inspecting the presence / absence of foreign matter is disposed along the PTP film 6 transfer path downstream of the film receiving roll 18. The inspection device 21 performs an inspection from the surface opposite to the inspection device 17 described above.
[0063]
Downstream of the inspection device 21, along the transfer path of the PTP film 6, a slit forming device 22 that forms a slit, a marking device 23 that gives a stamp indicating identification information such as a lot number, and the PTP film 6 are punched in one PTP sheet. A sheet punching device 24 is sequentially disposed. The sheet punching device 24 punches the PTP sheet 1 by the fixed mold 31 and the movable mold 32. A finished product hopper 25 for storing the falling PTP sheet 1 is provided below the sheet punching device 24.
[0064]
The outline of the PTP packaging machine 10 is as described above. On the uppermost stream side of the PTP packaging machine 10, a mechanism for continuously supplying the strip-shaped packaging film 3 so that the various processes described above are appropriately performed. Is required. This is the film supply apparatus 50 shown by the broken line in FIG.
[0065]
Below, the film supply apparatus 50 is demonstrated more concretely.
[0066]
As shown in FIG. 4, the film supply device 50 includes roll films 71 and 73, an automatic film splicing device 51, a feeding roller 52, a feeding motor 53, a storage box 54, and a control device 61. .
[0067]
The roll films 71 and 73 are obtained by winding the above-described band-shaped packaging film 3 into a roll shape. In the present embodiment, two roll films 71 and 73 are provided. In addition, it is good also as a structure provided with three or more roll films. For convenience of explanation, the strip-shaped packaging film 3 fed out from one roll film 71 is described as a film 72 and the strip-shaped packaging film 3 fed out from the other roll film 73 is described as a film 74 as appropriate.
[0068]
When one roll film 71 is consumed, the automatic film splicing device 51 has a function of connecting the end of the film 72 of the roll film 71 and the start of the film 74 fed out from the other roll film 73. ing.
[0069]
The feeding roller 52 is driven by a feeding motor 53. The feeding roller 52 feeds the packaging film 3 from one of the roll films 71 and 73 by sandwiching the packaging film 3 with the pressing roller 57.
[0070]
A film slack portion 75 is generated on the downstream side of the feeding roller 52, and the storage box 54 stores the film slack portion 75.
[0071]
The control device 61 controls the film feeding amount of the packaging film 3 by controlling the feeding motor 53. The control device 61 is configured as a so-called computer system including a CPU, a RAM, a ROM 62, an I / O, and the like, and operates based on a program stored in the ROM 62.
[0072]
Here, the configuration and function of the automatic film splicing device 51 will be briefly described.
[0073]
As shown in FIG. 5, the automatic film splicing device 51 includes a butting mechanism 200, a cutter mechanism 210, a holding mechanism 220, a tape bonding mechanism 230, and a consumption consumption detection mechanism 240.
[0074]
The butting mechanism 200 includes a pair of movable bases 201a and 201b supported by a guide rail (not shown) provided at a lower side of the transport path of the packaging film 3 so as to reciprocate in the film transport direction. , Movable pushers 202a and 202b attached to the movable bases 201a and 201b, a pair of racks 203a and 203b extending from the movable bases 201a and 201b so as to protrude in the film transport direction and facing the film width direction, A pinion 204 that meshes with 203a and 203b, and a reciprocating rotation device 205 that reciprocally rotates the pinion 204 are provided.
[0075]
The cutter mechanism 210 is fixed to the opposing inner walls of the respective movable bases 201a and 201b, and is provided with cutter bases 211a and 211b which are long in the film width direction, a movable frame 212 supported so as to be movable in the film width direction, and a movable frame 212. And a cutter blade 214a, 214b attached to the movable frame 212. The cutter blades 214a and 214b are movable in the film width direction together with the movable frame 212 in a state where the outer surfaces thereof are in contact with the inner surfaces of the cutter tables 211a and 211b.
[0076]
The holding mechanism 220 includes a fixing base 221 and a fixing pusher 222. When one roll film 71 is in use, the film 74 fed out from the other roll film 73 is the starting end (portion indicated by symbol S). Can be fixed in a state of slightly protruding downstream from the cutter table 211a.
[0077]
The tape bonding mechanism 230 includes a cylinder 231, a chuck 232 attached to the piston rod of the cylinder 231, a cutter 233, and an adhesive tape 234. The adhesive tape 234 is disposed so as to face the chuck 232 in the film width direction. The chuck 232 is configured to move in the film width direction by driving the cylinder 231 and draw out the adhesive tape 234. The cutter 233 can cut the adhesive tape 234 pulled out by the chuck 232.
[0078]
The consumption detection mechanism 240 includes an end detection sensor 241 and can detect the passage of the end of the film 72 (part indicated by the symbol E) fed out from the roll film 71 used first.
[0079]
In the automatic film splicing device 51 configured as described above, first, while using the film 72 fed out from one roll film 71, the film 74 is fed out from the other roll film 73, and the starting end of the film 74 is the cutter table 211a. In a state of slightly protruding further downstream, the fixing base 221 and the fixing pusher 222 of the holding mechanism 220 are fixed.
[0080]
When the end detection sensor 241 of the consumption detection mechanism 240 detects the end of the film 72 fed out from the roll film 71 in use, the controller 61 described above controls the feeding motor 53 to move the film 72. Further, the feeding motor 53 is stopped in a state where the end of the film 72 slightly protrudes upstream from the cutter table 211b. The transfer control of the film 72 at this time is performed based on a sensor 59 that detects the rotation of the pulse disk 58 attached to the shaft of the feeding roller 52.
[0081]
In this state, the movable pushers 202a and 202b of the butting mechanism 200 are moved and pressed against the movable bases 201a and 201b to fix the films 72 and 74.
[0082]
Subsequently, the movable frame 212 of the cutter mechanism 210 is moved in the film width direction by driving the cylinder 213. Accordingly, the end of the film 72 and the start end of the film 74 are cut in parallel by the cutter blades 214a and 214b and the cutter bases 211a and 211b.
[0083]
When the films 72 and 74 are cut, the movable frame 212 is returned to the original position, and the reciprocating rotation device 205 of the film butting mechanism 200 is operated. As a result, the pinion 204 rotates, and the movable bases 201a and 201b move in directions toward each other via the racks 203a and 203b. The movable tables 201a and 201b are moved until the inner surfaces of the cutter tables 211a and 211b come into contact with each other. As a result, the end of the film 72 and the start of the film 74 are aligned at the same position.
[0084]
Subsequently, the end of the film 72 and the start of the film 74 are pasted by the adhesive tape 234 by the tape bonding mechanism 230. Specifically, the cylinder 231 is operated and the adhesive tape 234 is pulled out by the chuck 232. Then, the adhesive tape 234 is attached to the cut edges of the films 72 and 74 by pressing from above with a pressing member (not shown), and the adhesive tape 234 is cut with the cutter 233.
[0085]
When the roll film 71 is consumed by the automatic film splicing device 51 as described above, the end of the roll film 71 and the start end of the roll film 73 are connected and the packaging film 3 is continuously drawn out.
[0086]
However, during the film connection period by the automatic film splicing device 51, the feeding motor 53 is stopped by the control device 61 as described above. Therefore, the storage box 54 is configured to store the film slack portion 75 on the downstream side of the feeding roller 52 in order to enable supply of the packaging film 3 during the film connection period.
[0087]
Then, next, the control regarding the film slack part 75 is demonstrated based on FIG.4 and FIG.6. Here, the contents of the control will be described separately for (1) normal supply control, (2) film accumulation control, (3) accumulation supply control, and (4) film connection control.
[0088]
(1) Normal supply control
In the normal supply control, the storage box 54 stores a small amount of the film slack portion 75. The slight amount here means an amount that does not affect the supply of the packaging film 3 even if the film feed amount momentarily falls below the film supply amount.
[0089]
At this time, the control device 61 controls the feeding motor 53 so that the lowermost portion (the portion indicated by the symbol L) of the film slack portion 75 falls within the vertical range defined by the sensors 55 and 56 shown in FIG. To do. For example, as shown by a broken line in FIG. 4, if the lowermost part of the film slack portion 75 exceeds the upper limit position defined by the sensor 56, the film feeding amount is increased. On the contrary, if the lowermost part of the film slack portion 75 falls below the lower limit position defined by the sensor 55, the film feeding amount is reduced. Accordingly, the control device 61 maintains the amount of the film slack portion 75 stored in the storage box 54.
[0090]
(2) Film accumulation control
When the remaining amount of the roll film 71 reaches a predetermined amount during the normal supply control described above, the process proceeds to film accumulation control. Whether or not the remaining amount of the roll film 71 has reached a predetermined amount is determined by an optical sensor 76 provided at one end of the roll film 71. A light source (not shown) is disposed at the other end of the roll film 71 at a position facing the optical sensor 76. Accordingly, the optical sensor 76 detects that the radial distance of the roll film 71 has decreased to a certain value, that is, that the remaining amount of the roll film 71 has reached a predetermined amount.
[0091]
When shifting to the film accumulation control, the control device 61 controls the feeding motor 53 to rotate the feeding roller 52 at a high speed. As a result, the film feed amount greatly exceeds the film supply amount, and the film slack portion 75 is generated and stored in the storage box 54. Based on the sensor 59, the control device 61 generates an amount of the film slack portion 75 that can supply the film during a film connection period such as several tens of seconds that is known in advance. This state is shown in FIG.
[0092]
(3) Accumulated supply control
When an amount of the film slack portion 75 that can supply the film is generated by the above-described film accumulation control, the process proceeds to accumulation supply control.
[0093]
In this accumulation supply control, the control device 61 controls the feeding motor 53 so as to maintain the amount of the film slack portion 75 stored in the storage box 54, thereby controlling the film feeding amount. Specifically, the feeding motor 53 is controlled based on a film supply amount detected by a detection mechanism (not shown). This film supply amount is the amount of film supplied from the film slack portion 75 to the downstream side including the heating means 12 and the pocket forming means 13. At this time, the control device 61 determines the film feeding amount from the number of rotations of the feeding roller 52 based on the sensor 59.
[0094]
(4) Film connection control
When the end of the film 72 fed out from the roll film 71 in use is detected by the end detection sensor 241 of the consumption detection mechanism 240 described with reference to FIG. To do.
[0095]
In the film connection control, the control device 61 stops the feeding motor 53. As a result, the film feed amount becomes “0”.
[0096]
At this time, as shown in FIG. 6B, in the automatic film splicing device 51, as described above, the end of the film 72 (portion indicated by symbol E) and the start of the film 74 (portion indicated by symbol S). And are connected.
[0097]
In this film connection period, the film slack portion 75 stored in the storage box 54 covers the supply of the film to the downstream side including the heating means 12 and the pocket forming means 13.
[0098]
According to the control content described above, the film can be supplied even during the film connection period.
[0099]
Here, the correspondence between the present embodiment and the column of “means for solving the problem” will be described.
[0100]
In this embodiment, the film supply device 50 corresponds to a “film supply device”, the PTP packaging machine 10 corresponds to a “PTP sheet manufacturing device”, and the program 62 stored in the control device 61 is a “program”. It corresponds to.
[0101]
The roll films 71 and 73 correspond to “roll film”, the control device 61 corresponds to “control means”, the automatic film splicing device 51 corresponds to “connection means”, and the storage box 54 corresponds to “storage means”. It corresponds to. The optical sensor 76 corresponds to “remaining amount detection means”, and the sensors 56 and 57 correspond to “position detection means”.
[0102]
In the present embodiment, (1) normal supply control and (3) accumulation supply control are equivalent to control in the “normal mode” by the control means, and (2) film accumulation control is “accumulation mode”. (4) Film connection control corresponds to control in the “connection mode”. Specifically, (1) the normal supply control corresponds to the control in the “normal mode immediately before shifting to the accumulation mode”, and (3) the storage supply control is controlled in the “normal mode immediately after the shift from the accumulation mode”. Correspond.
[0103]
In addition, (1) normal supply control is “normal supply process”, (2) film accumulation control is “film accumulation process”, (3) accumulation supply control is “accumulation supply process”, and (4) film connection control. Corresponds to the “film connection process”.
[0104]
Next, the effect which the film supply apparatus 50 of this embodiment exhibits is demonstrated.
[0105]
In the present embodiment, the storage box 54 stores the generated film slack portion 75 so that the packaging film 3 can be supplied even during the film connection period (see FIG. 4). If the film slack portion 75 is used for supplying the packaging film 3 in this way, the storage box 54 for storing the film slack portion 75 becomes compact, and the film supply device 50 can be downsized.
[0106]
Further, in the present embodiment, the control device 61 determines that the remaining amount of the roll film 71 has reached a predetermined amount based on the optical sensor 76, rotates the feeding roller 52 at a high speed, and is used for packaging during the film connection period. An amount of the film slack portion 75 that can supply the film 3 is generated (see FIG. 6A). That is, the amount of the film slack portion 75 that can supply the packaging film 3 is not always stored in the storage box 54. Therefore, a complicated configuration for controlling the film feeding amount becomes unnecessary, and the film supply device 50 can be downsized.
[0107]
In the normal supply control (1), simple and reliable control of the film feeding amount based on the sensors 55 and 56 is possible, and stable film supply is possible (see FIG. 4).
[0108]
Furthermore, in the present embodiment, when an amount of the film slack portion 75 that can supply the packaging film 3 is generated, the process proceeds to the accumulation and supply control (3). Thereby, the film slack portion 75 is not generated excessively, and the storage box 54 can be configured compactly. As a result, the film supply device 50 can be further downsized.
[0109]
In addition, you may implement as follows, for example, without being limited to the content of description of embodiment mentioned above.
[0110]
(A) In the above embodiment, in the normal supply control of (1), the control device 61 has the upper and lower ranges defined by the sensors 55 and 56 in the lowermost part of the film slack portion 75 (indicated by the symbol L in FIG. 4). The film feed amount is controlled so that the portion shown in FIG.
[0111]
However, it is only necessary to appropriately maintain the amount of the film slack portion 75. For example, as described in the accumulation and supply control in (3), the film feeding amount is grasped and controlled from the rotation speed of the feeding roller 52 based on the sensor 59. Also good.
[0112]
However, an amount of error is included in the film feed amount determined from the rotation speed of the feed roller 52 based on the sensor 59. Therefore, in order to supply the packaging film 3 stably, a method of directly grasping the slackness of the film slack portion 75 as in the above embodiment is desirable.
[0113]
(B) On the other hand, in the storage and supply control (3), the amount of the film slack portion 75 is increased, so that the control based on the sensors 55 and 56 is not performed.
[0114]
However, since the storage supply control (3) is a short time control until the film connection control (4) is started, there is no problem even if the control includes an error based on the sensor 59.
[0115]
(C) In the said embodiment, although applied to the PTP packaging machine 10, it cannot be overemphasized that it can apply to the other apparatus which supplies a strip | belt-shaped film continuously.
[Brief description of the drawings]
FIG. 1A is a perspective view showing a PTP sheet, and FIG. 1B is a perspective view showing a PTP film.
FIG. 2 is a partially enlarged cross-sectional view showing a PTP sheet.
FIG. 3 is a schematic diagram for explaining a schematic configuration of a PTP packaging machine.
FIG. 4 is a schematic diagram for explaining a film supply apparatus.
FIG. 5 is a perspective view showing a schematic configuration of an automatic film splicing device.
FIG. 6 is a schematic diagram for explaining a film supply apparatus.
FIG. 7 is a schematic diagram for explaining a conventional film supply mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... PTP sheet, 3 ... Film for packaging, 10 ... PTP packaging machine as a manufacturing apparatus of a PTP sheet, 12 ... Heating means, 13 ... Pocket forming means, 14 ... Pocket part forming apparatus, 50 ... Film supply apparatus, 51 ... Automatic film splicing device as connecting means, 52... Feeding roller, 53... Feeding motor, 54... Storage box as storing means, 55 and 56 .. sensor as position detecting means, 57. Control device as control means, 62 ... ROM, 71, 73 ... roll film, 72, 74 ... film, 75 ... film slack portion, 76 ... optical sensor as remaining amount detection means, 91, 93 ... roll film, 92, 94 ... Film, 110 ... Automatic film splicing device, 111 ... Feeding motor, 120 ... Heating means, 130 ... Pocket forming means, 40 ... stepped roller, 141 ... fixing roller, 142 ... moving roller, 143 and 144 ... sensor.

Claims (1)

A pocket part forming apparatus comprising a pocket forming means for forming a pocket part, with respect to a heating means for partially heating a packaging film made of a thermoplastic resin material and a packaging film made flexible by heating of the heating means,
A tablet loading device for filling the pocket with tablets;
A heating means and a film receiving roll, and after the tablet filling, a sticking means for sticking a cover film to the packaging film by heating and pressing to form a PTP film;
A sheet punching device for punching the PTP film in units of PTP sheets;
A PTP sheet manufacturing apparatus comprising a film supply device that continuously supplies a band-shaped packaging film from a roll film wound in a roll shape toward the pocket portion forming device,
The film supply device
A plurality of roll films;
A feeding roller for feeding the film from the roll film;
And control means for controlling the film feeding amount from the roll film,
When the roll film is consumed, the connecting means for connecting the end of the roll film and the start of another roll film,
The control means is configured to operate in a connection mode in which the film feeding amount is “0” during the film connection period by the connection means,
In order to enable supply of the film even during the film connection period, the storage means stores a film slack portion generated on the downstream side of the connection means,
By controlling the film feed amount by the control means, the amount of the film slack portion stored in the storage means can be adjusted,
The control means is configured to be operable in a normal mode for controlling the film feed amount so as to maintain the amount of the film slack portion stored in the storage means,
Comprising a remaining amount detecting means for detecting the remaining amount of the roll film;
When the remaining amount of the roll film based on the remaining amount detecting unit reaches a predetermined amount , the control unit increases the film feeding amount from the normal mode, and supplies the film during the film connection period. shifts to the storage mode to generate the film loose portion of the amount which is possible, when the film loose portion of the amount of supply of the film becomes possible is produced, again shifted to the normal mode, the film connection When the period ends, the connection mode is configured to shift to the normal mode ,
In addition, it comprises a position detection means for detecting the position of the lowermost portion of the film slack portion that hangs down in the vertical direction, and the control means is based on the position detection means in the normal mode immediately before shifting to the accumulation mode. And determining the degree of film slack, and based on the degree of slack of the film slack portion, the film feed amount is configured to be controlled,
Further, a sensor for detecting the rotation speed of the feeding roller is provided, and the control means controls the film feeding amount based on the rotation speed of the feeding roller based on the sensor in the normal mode immediately after shifting from the accumulation mode. An apparatus for manufacturing a PTP sheet, wherein

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