JP4448061B2 - SEALING DEVICE AND PTP SHEET MANUFACTURING DEVICE - Google Patents

Description

  The present invention relates to a sealing device that overlaps and seals a packaging film formed with a plurality of pocket portions and a cover film, and a PTP sheet manufacturing apparatus including the sealing device.

  In general, a PTP sheet (blister sheet) is formed by forming a pocket portion in a band-shaped packaging film, filling a tablet or the like, sealing a cover film, and then punching it from the band-shaped film by a sheet punching device. Can be obtained.

  For the sealing of the cover film in this manufacturing process, a sealing device comprising a sealing roll configured to generate heat is used.

  As a sealing roll of such a sealing device, a technique for directly heating the roll body by providing a mechanism for generating an eddy current by applying an alternating magnetic field to the roll body has been devised.

In addition, a technique is known in which the roll body is provided with a jacket chamber filled with a gas-liquid two-phase heat medium so as to equalize the surface temperature of the roll body, that is, to reduce temperature unevenness (for example, patents). Reference 1).
Japanese Patent Laid-Open No. 7-65944

  However, when the above technique is employed, when the rotation of the roll main body is stopped, the surface temperature of the roll main body cannot be equalized, and the temperature unevenness of the roll main body becomes large. This is presumably because the AC magnetic field does not act uniformly in the circumferential direction of the roll body of the seal roll. In particular, in the configuration in which the jacket chamber is provided inside the roll body, the temperature irregularity of the roll body becomes noticeable due to the presence of the jacket chamber that promotes soaking when the roll body rotates.

  Therefore, after that, when starting sealing or resuming after interrupting sealing, there is a possibility that uniform sealing cannot be performed until the temperature unevenness of the roll body is resolved.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to eliminate temperature unevenness that occurs when rotation of a roll body stops, and to realize a more stable seal at the start of sealing.

  Characteristic means that can achieve the above-described object will be described below. For each means, characteristic actions and effects are described as necessary.

Means 1. A film receiving roll having a plurality of recesses capable of accommodating a plurality of pockets formed in a packaging film;
A heatable seal roll provided opposite to the film receiving roll,
The packaging film and the cover film are overlapped with each other so as to close the pocket portion filled with the object to be filled, and passed between the film receiving roll and the sealing roll, thereby allowing the packaging film to pass through the packaging film. A sealing device for attaching a cover film,
The seal roll is
A cylindrical roll body made of a conductor;
Eddy current generating means provided in a fixed state in the roll body, and generating an eddy current by applying an alternating magnetic field to the roll body,
Furthermore, a roll position changing means capable of changing the position of the seal roll between a pressure contact state where the seal roll is pressed against the film receiving roll and a separated state where the seal roll is separated from the film receiving roll;
A seal device comprising: a rotation drive unit capable of rotating at least the roll body of the seal roll brought into the separated state by the roll position changing unit.

  The sealing device described in means 1 includes a film receiving roll and a sealing roll. The film receiving roll has a plurality of recesses that can accommodate a plurality of pocket portions formed in the packaging film. These recesses do not necessarily correspond to each pocket portion on a one-to-one basis (the same applies to the following means). The seal roll is provided opposite to the film receiving roll and can be heated. With this configuration, the cover film is covered with the packaging film by covering the packaging film and the cover film and passing between the film receiving roll and the seal roll so as to close the pocket portion filled with the filling material. To be attached.

  Here, the seal roll includes a cylindrical roll body made of a conductor and eddy current generating means provided in a fixed state in the roll body, and an AC magnetic field is applied to the roll body by the eddy current generating means. Eddy currents are generated. Thereby, the roll body can be heated.

  In the means 1, the position of the seal roll is further changed by the roll position changing means between a pressure contact state in which the seal roll is in pressure contact with the film receiving roll and a separated state in which the seal roll is separated from the film receiving roll. Then, at least the roll main body of the separated seal roll is rotationally driven by the rotational driving means.

  Conventionally, when the rotation of the roll main body is stopped, the surface temperature of the roll main body cannot be equalized, and the temperature unevenness of the roll main body becomes large. In this respect, according to the means 1, since at least the roll body of the seal roll in the separated state can be rotated by the rotation driving means, it is generated in the roll body by rotating the roll body while heating. Uneven temperature can be eliminated. As a result, temperature unevenness occurring in the roll body can be eliminated, and more stable sealing can be realized at the start of sealing.

  Note that the rotation driving of the roll body by the rotation driving means includes not only rotation in the same direction but also reverse driving and swing driving. The same applies to the following means.

Mean 2. A film receiving roll having a plurality of recesses capable of accommodating a plurality of pockets formed in a packaging film;
A heatable seal roll provided opposite to the film receiving roll,
The packaging film and the cover film are overlapped with each other so as to close the pocket portion filled with the object to be filled, and passed between the film receiving roll and the sealing roll, thereby allowing the packaging film to pass through the packaging film. A sealing device for attaching a cover film,
The seal roll is
A cylindrical roll body having a jacket chamber made of a conductor and filled with a gas-liquid two-phase heat medium;
Eddy current generating means provided in a fixed state in the roll body, and generating an eddy current by applying an alternating magnetic field to the roll body,
Furthermore, a roll position changing means capable of changing the position of the seal roll between a pressure contact state where the seal roll is pressed against the film receiving roll and a separated state where the seal roll is separated from the film receiving roll;
A seal device comprising: a rotation drive unit capable of rotating at least the roll body of the seal roll brought into the separated state by the roll position changing unit.

  The sealing device described in the means 2 is configured in substantially the same manner as that described in the means 1, and at least the roll body of the separated seal roll can be driven to rotate by the rotation driving means. By rotating the main body while heating, the temperature unevenness generated in the roll main body can be eliminated. As a result, temperature unevenness occurring in the roll body can be eliminated, and more stable sealing can be realized at the start of sealing.

  Particularly, in the means 2, since the roll body has a jacket chamber filled with a gas-liquid two-phase heat medium, when the rotation of the roll body stops, the jacket chamber causes temperature unevenness. In this respect, according to the means 62, even if the jacket chamber is provided, the roll body can be rotated by the rotation driving means. Therefore, by rotating the roll body, the surface temperature of the jacket chamber is equalized. Heating is achieved, and temperature unevenness that occurs in the roll body can be reliably eliminated. Thus, in the structure which provided the jacket chamber in the roll main body, this structure has the outstanding effect.

Means 3. In the sealing device according to means 2,
The jacket chamber has a plurality of jacket chamber bodies provided inside the roll body,
A sealing device comprising: a communicating portion that communicates the plurality of jacket chamber main bodies.

  A configuration in which the jacket chamber described above includes a plurality of jacket chamber bodies provided inside the roll body and a communication portion that communicates the plurality of jacket chamber bodies, for example, a plurality of jacket chamber bodies in the circumferential direction of the roll body. In the provided structure, the heat medium can be moved in the circumferential direction of the roll body by moving the communicating portion. For this reason, when the rotation of the roll main body is stopped, the temperature unevenness becomes more remarkable. In this respect, according to the means 3, since the roll body can be rotationally driven by the rotational drive means, the relative movement of the heat medium for equalizing the surface temperature of the roll body can be achieved by rotating the roll body. It is possible to surely eliminate the temperature unevenness generated in the roll body. Thus, in the configuration in which the jacket chamber is provided with the communication path, this configuration has an extremely excellent effect.

  Here, the jacket chamber main body and the communication portion are provided here, but naturally the communication portion is continuous from the jacket chamber main body and apparently becomes a part of the jacket chamber main body. .

Means 4. In the sealing device according to any one of means 1 to 3,
Control means for performing heating control of the roll body by the eddy current generating means and rotation driving control of the roll body by the rotation driving means;
Prior to the sealing, the control means preheats the roll body by heating the roll body by the eddy current generation means and rotationally driving the roll body by the rotation driving means in the separated state. A sealing device characterized in that control can be performed.

  The means 4 includes control means for performing heating control and rotation drive control of the roll body, and preheating control can be executed by this control means. In the preheating control, the roll main body is preheated by heating the roll main body and rotating the roll main body in a separated state prior to sealing.

  According to the means 4, the temperature unevenness generated in the roll body can be eliminated by executing the preheating control by the control means. As a result, temperature unevenness occurring in the roll body can be eliminated, and more stable sealing can be realized at the start of sealing.

  Note that “heating and rotational driving” include not only the case where rotational driving is performed in parallel with heating, but also the case where rotational driving is performed by continuing heating first. The same applies to the following means.

Means 5. In the sealing device according to any one of means 1 to 3,
A roll position change control means capable of controlling the roll position change means, and at the time of non-sealing, the roll position change control means controls the roll position change means to place the seal roll in the separated state;
further,
A seal start instruction detecting means capable of detecting at least a seal start instruction;
When a seal start instruction is detected by the seal start instruction detection means, in the separated state, the roll body is heated by the eddy current generation means and the roll body is rotated by the rotation drive means. And preheating control means for performing preheating control for preheating the roll body,
When a predetermined preheating end condition is satisfied, the preheating control unit ends the preheating control, and the roll position change control unit controls the roll position change unit to bring the seal roll into the pressure contact state. A sealing device that allows sealing.

  In the means 5, the roll position change control means capable of controlling the roll position change means controls the roll position change means at the time of non-sealing to place the seal roll in the separated state.

  When the seal start instruction detection means detects the seal start instruction, the preheat control means executes preheat control. The preheating control is the same as the control described in the above configuration.

  Thereafter, when a predetermined preheating end condition is satisfied, the preheating control unit ends the preheating control, and the control of the roll position changing unit by the roll position changing control unit brings the seal roll into a pressure contact state, and the seal is allowed. The

  According to the means 5, since the preheating control is executed when the seal start instruction is detected after the seal roll is in the separated state at the time of non-sealing, the temperature unevenness generated in the roll body can be eliminated. When a predetermined preheating end condition is satisfied, the preheating control is ended and the seal is allowed. Therefore, by setting the preheating end condition appropriately, a more stable seal can be realized at the start of the seal.

Means 6. In the sealing device according to means 5,
Furthermore, at least a seal interruption instruction detection means capable of detecting a seal interruption instruction is provided,
When a seal interruption instruction is detected by the seal interruption instruction detection means, the roll position change control means controls the roll position change means to place the seal roll in the separated state, and the preheating control means A sealing device that performs the preheating control.

  According to the means 6, when the seal interruption instruction is detected, the seal roll is separated by the roll position change control means, and the preheating control is executed by the preheating control means. Therefore, temperature unevenness generated in the roll body during preheating when the seal is interrupted can be eliminated, and a more stable seal can be realized when the seal is resumed after the seal is interrupted.

Mean 7 In the sealing device according to means 6,
A preheating control unit performs preheating control when a predetermined waiting time has elapsed after a seal interruption instruction is detected by a seal interruption instruction detection unit.

  In the above configuration, when the seal interruption instruction is detected, the roll position change control means causes the seal roll to be separated, but immediately after the separation state, that is, immediately after the rotation is stopped, the surface temperature of the roll body is soaked. It has become. Therefore, it is considered that the temperature unevenness of the roll body cannot be ignored and the preheating control is necessary when a predetermined time has passed since the separation.

  In this respect, in the means 7, the preheating control means executes the preheating control when a predetermined standby time has elapsed after the seal interruption instruction is detected. In this way, the preheating control is performed only when the preheating control is really necessary, which is economically advantageous.

Means 8. In the sealing device according to any one of means 5 to 7,
A temperature measuring means capable of measuring at least the surface temperature of the roll body or a temperature corresponding thereto;
The sealing device according to claim 1, wherein the preheating control unit determines whether or not the predetermined preheating end condition is satisfied based on a temperature measurement result by the temperature measuring unit.

  According to the means 8, based on the temperature measurement result by the temperature measuring means, it is determined by the preheating control means whether or not the predetermined preheating end condition described above is satisfied. Here, the temperature measuring means can measure at least the surface temperature of the roll body or a temperature corresponding thereto. For example, it may be realized as a non-contact type temperature sensor and measure the temperature at a predetermined position as needed. Since the roll body is rotated by preheating control, in this case, it is possible to measure the temperature change in the circumferential direction of the roll body. If the preheating end condition is that this temperature change is relatively small, the roll body It is possible to determine that the temperature unevenness has been eliminated. If it does in this way, cancellation of the temperature nonuniformity of a roll main part can be judged appropriately, and a more stable seal can be realized at the time of a seal start.

  In addition, although the non-contact temperature sensor was mentioned as an example of a temperature measurement means, it is not limited to this, For example, you may comprise with an infrared camera etc.

Means 9. In the sealing device according to any one of means 5 to 7,
The preheating control means determines that the predetermined preheating end condition is satisfied when a set preheating time has elapsed.

  The time required for the preheating control, that is, the time required for eliminating the temperature unevenness generated in the roll body of the seal roll can be calculated by experiments or the like. Therefore, the means 9 is configured to determine that the preheating end condition is satisfied when the set preheating time has elapsed. In this way, the configuration for determining the preheating end condition becomes relatively simple, and the control processing of the preheating control means can be simplified.

  In addition, it is thought that the time required for the preheating control varies depending on the environment (air temperature and the like) and the degree of occurrence of temperature unevenness of the roll body at the start of the preheating control. Therefore, it may be “provided with preheating time setting means for setting the preheating time”.

  Although the above has been described as the invention of the sealing device, it can also be realized as a PTP sheet manufacturing device including the sealing device described above.

  Means 10. An apparatus for manufacturing a PTP sheet, wherein the filling material is a tablet, and the sealing apparatus according to any one of claims 1 to 9 is provided.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1A and 1B, a PTP sheet (blister sheet) 1 is made of, for example, PP (polypropylene), a packaging film 3 having a plurality of pocket portions 2, and a pocket portion 2. And an aluminum cover film 4 attached to the packaging film 3. Each pocket 2 stores one tablet 5 as a filling. In the present embodiment, the PTP sheet 1 is manufactured into a sheet shape by punching a strip-shaped PTP film 6 (see FIG. 2) formed from the strip-shaped packaging film 3 and the cover film 4.

  Next, an outline of the PTP packaging machine 10 as a “PTP sheet manufacturing apparatus” for manufacturing the PTP sheet 1 configured as described above will be described with reference to FIG. 2.

  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.

  The packaging film 3 wound in a roll shape is intermittently conveyed, and the heating means 12 and the pocket forming means 13 are arranged in parallel along the conveyance 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 intervals between transport operations of the packaging film 3.

  A tablet loading device 16, an inspection device 17, and a sealing device 30 (film receiving roll 18) for automatically filling the tablet 5 with the tablet 5 are arranged along the transfer path of the packaging film 3 in which the pocket portion 2 is formed. It is installed. The tablet loading device 16 drops the tablet 5 by opening a shutter, and the tablet 5 is loaded into each pocket portion 2 when the shutter is opened.

  The inspection device 17 is for inspecting whether or not the tablets 5 are reliably filled in the pocket portions 2, whether or not there are abnormalities in the tablets 5, and whether or not foreign matter is mixed. The inspection device 17 performs an inspection from the opening side of the pocket portion 2.

  On the other hand, the cover film 4 formed in a belt shape is wound in a roll shape. The drawing end of the cover film 4 wound in a roll shape is guided toward the sealing device 30 (film receiving roll 18). The sealing device 30 includes a film receiving roll 18 and a sealing roll 19. A seal roll 19 can be pressed against the film receiving roll 18, and the packaging film 3 and the cover film 4 are fed between the rolls 18 and 19. And the sealant of the cover film 4 is heat-welded because the packaging film 3 and the cover film 4 pass between both the rolls 18 and 19 in a heating press-contact state. Thereby, the cover film 4 is attached to the packaging film 3, and the PTP film 6 in which the tablet 5 is filled in each pocket portion 2 is manufactured.

  In the present embodiment, the film receiving roll 18 is rotationally driven by a motor, and the seal roll 19 is driven to follow the rotation of the film receiving roll 18. . Further, a plurality of recesses capable of accommodating the pocket portions 2 of the packaging film 3 are formed on the surface of the film receiving roll 18 so that the pocket portions 2 are not crushed during the sealing. Further, the seal roll 19 is provided on an arm 33 that can be rotated about a rotation shaft 71 as a fulcrum. This will be described later.

  Downstream of the film receiving roll 18, an inspection device 21 is provided along the PTP film 6 transfer path for inspecting whether there is an abnormality such as a tablet or the presence of foreign matter. This inspection device 21 performs an inspection from the protruding surface side of the pocket portion 2. Therefore, in combination with the inspection by the inspection device 17, the inspection from the front and back both sides of the PTP film 6 can be executed. When the defective products are determined by the inspection devices 17 and 21, the PTP sheet determined as defective is separately discharged by a defective sheet discharge mechanism (not shown).

  A slit forming device 22, a marking device 23, and a sheet punching device 24 are arranged in this order along the transfer path of the PTP film 6 downstream of the inspection device 21. The slit forming device 22 has a function of forming a slit at a predetermined position of the PTP film 6. The marking device 23 has a function of attaching a stamp indicating identification information such as a lot number to a predetermined position of the PTP film 6. The sheet punching device 24 has a function of punching the PTP film 6 into one PTP sheet. The PTP film 6 is intermittently transferred according to the sheet width. Therefore, the punching of the PTP sheet 1 by the sheet punching device 24 is performed at the transfer interval of the PTP film 6. A finished product hopper 25 for storing the PTP sheet 1 falling from the sheet punching device 24 is provided below the sheet punching device 24.

  The outline of the PTP packaging machine 10 is as described above. In the following, the sealing device 30, which is a characteristic part of the present embodiment, in particular, the seal roll 19 will be described more specifically.

  FIG. 3 is a schematic cross-sectional view showing the configuration of the seal roll 19 and the like in the present embodiment. As shown in the figure, the seal roll 19 includes a roll body 31 and eddy current generating means 32. The roll body 31 is made of a conductor, but iron or the like that is a conductor and a magnetic material is more suitable. As described above, the seal roll 19 is provided on the arm 33, but the roll body 31 of the seal roll 19 is supported by the arm 33 via a bearing 34 so as to be freely rotatable. Furthermore, the roll main body 31 has a substantially cylindrical shape, and its central portion is hollow. A jacket chamber 35 is formed in the vicinity of the hollow portion (see FIG. 4). The jacket chamber 35 includes a plurality of jacket chamber bodies 36 formed along the axial direction, and communication portions 37 that connect the jacket chamber bodies 36 in the vicinity of both ends of the roll body 31. The jacket chamber 35 is filled with a gas-liquid two-phase heat medium. Further, a gear 38 that protrudes in the outer peripheral direction is provided on the side of the roll body 31 close to the arm 33, and the roll body 31 rotates together with the gear 38.

  The eddy current generating means 32 is provided in the hollow portion at the center of the roll body 31. More specifically, the eddy current generating means 32 includes an iron fixed shaft 42 having a hollow hole 41 formed in the center. The fixed shaft 42 is positioned closer to the end than the end plates 44 and 45, an iron core 43 positioned at the center in the longitudinal direction, a pair of enlarged end plates 44 and 45 formed at both ends of the core 43. A pair of support rods 46 and 47 are integrally formed. In the present embodiment, these 43 to 47 are integrally formed, but the iron core 43 and the end plates 44 and 45 and the support rods 46 and 47 may be configured separately. The iron core 43 is formed with a communication hole 48 that communicates the outer periphery of the iron core 43 and the hollow hole 41.

  In the present embodiment, a bearing 49 is interposed between the support rods 46 and 47 and the hollow inner wall portion of the roll body 31, and one support rod 46 is fixed to the arm 33. Therefore, while the fixed shaft 42 is stationary, the roll main body 31 can rotate relative to the fixed shaft 42.

  As shown in FIG. 5, an electromagnetic wire, that is, a coil 51 is wound around the outer periphery of the iron core 43, and the lead wire 51 a at the end thereof passes through the communication hole 48 and the hollow hole 41. One support rod 46 is led out. The end plates 44 and 45 and the iron core 43 are formed with a plurality of (for example, three) dividing grooves (not shown). Due to the presence of the dividing groove, generation of an eddy current described later on the iron core 43 side is suppressed.

  In the present embodiment, an AC magnetic field is generated by supplying electric power from an AC power source to the coil 51 (lead wire 51a). An eddy current is generated when the AC magnetic field is applied to the roll body 31. The roll body 31 is directly heated based on the eddy current. In this sense, it can be said that the eddy current generating means 32 is mainly composed of the iron core 43 and the coil 51.

  As shown in FIG. 3, in the present embodiment, a non-contact type temperature sensor 39 is provided in the vicinity of the surface of the roll body 31 in order to measure the temperature of the roll body 31.

  Next, the configuration of the arm 33 that changes the position of the seal roll 19 will be described. FIG. 6 is an explanatory view showing the seal roll 19 from the side in the transport direction as in FIG. 2, and FIG. 7 is a cross-sectional view taken along the line AA in FIG.

  As shown in FIG. 7, a base 70 is provided that is erected perpendicular to the conveying direction of the packaging film 3 and the cover film 4 (the PTP film 6 after passing through the sealing device 30). 2 and 3, the base portion 70 is disposed on the back side (the back side of the paper surface) of the sealing device 30.

  A rotation shaft 71 is provided on the base portion 70 so as to protrude to the front surface side, and the arm 33 is rotatably supported with the rotation shaft 71 as a fulcrum. The arm 33 is supported by the rotation shaft 71 near one end in the longitudinal direction, and holds the seal roll 19 near the other (upper) end. Specifically, as described above, the roll body 31 of the seal roll 19 is supported so as to be freely rotatable. The roll body 31 is provided with a gear 38.

  The base 70 is provided with a rotation driving means 81. The rotation drive means 81 is attached to the motor drive shaft 84 and rotates together with the rotation drive motor 83 protruding from the base 70 to the front side, the motor drive shaft 84 protruding further from the rotation drive motor 83 to the front side. The drive gear 85 is comprised.

  In such a configuration, the rotation of the arm 33 is derived by the arm rotation means 61. The arm rotation means 61 is composed of, for example, a cylinder. By the rotation of the arm 33 by the arm rotation means 61, the seal roll 19 can move in the contact / separation direction (direction indicated by symbol B in FIG. 3) with respect to the film receiving roll 18. Thereby, the state in which the seal roll 19 is in pressure contact with the film receiving roll 18 (“pressure contact state”, the state indicated by a solid line in FIG. 3), and the state in which the seal roll 19 is separated from the film receiving roll 18 (“separated state”), The position of the seal roll 19 can be changed between the two-dot chain line in FIG.

  When the seal roll 19 is in the pressure contact state, as described above, the packaging film 3 and the cover film 4 can be passed in the pressure contact state. In this case, the film receiving roll 18 is driven and rotated, and the seal roll 19 is driven and rotated via the packaging film 3 and the cover film 4. On the other hand, when the seal roll 19 is in the separated state, the gear 36 of the seal roll 19 and the drive gear 85 of the rotation drive means 81 are engaged. Thereby, when the rotation drive motor 83 is driven, the roll body of the seal roll 19 is rotated when the seal roll 19 is in the separated state.

  Next, the electrical configuration in this embodiment will be described. As shown in FIG. 8, the sealing device 30 includes a control device 62. The control device 62 is a so-called computer including a CPU, a ROM, a RAM, an I / O, a free-run counter, and the like. And the arm rotation means 61 for rotating the arm 33, the coil 51 (lead wire 51a) for applying an alternating magnetic field to the roll body 31, and the rotation for rotating the roll body 31 in the separated state The drive motor 83 is electrically connected to the output side of the control device 62 and is controlled by the control device 62. The controller 62 controls at least one of the voltage and current supplied to the lead wire 51a.

  Further, on the input side of the control device 62, a seal start instruction detection unit 63 that detects a seal start instruction by the seal device 30, a seal interruption instruction detection unit 64 that detects a seal interruption instruction, and the temperature of the roll body 31. A temperature sensor 39 (see FIG. 5) for detecting non-contact is electrically connected. The seal start instruction detecting means 63 is embodied as a start switch operated by an operator, for example. Similarly, the seal interruption instruction detecting means 64 is embodied as an interruption switch operated by an operator, for example. Of course, it may be a means for detecting a start / interruption instruction signal from the PTP packaging machine 10. Note that the surface temperature information of the roll body 31 is input to the control device 62 from the temperature sensor 39 as needed.

  Next, operation | movement of the sealing apparatus 30 of this embodiment is demonstrated.

  For example, when starting the PTP packaging machine 10 and the seal roll 19 is in the separated state, if the seal start instruction detecting unit 63 detects a seal start instruction, the controller 62 performs preheating control. . Specifically, the control device 62 supplies power from the AC power source to the coil 51 (lead wire 51a). Thereby, an alternating magnetic field is generated, an eddy current is generated in the roll body 31, and the roll body 31 is heated. In parallel with the power supply to the coil 51, the control device 62 drives the rotation drive motor 83 of the rotation drive means 81. Thereby, in the separated state, the gear 38 meshing with the drive gear 85 rotates, and the roll body 31 rotates by the rotation of the gear 38. That is, the roll body 31 is rotated simultaneously with being heated.

  As described above, since the surface temperature of the roll body 31 is input from the temperature sensor 39 as needed, the control device 62 monitors the temperature change in the circumferential direction of the roll body 31 in the preheating control. When the temperature change in the circumferential direction becomes sufficiently small, the preheating control is terminated. When the preheating control is finished, the control device 62 drives the arm rotation means 61. As a result, the arm 33 is rotated, the seal roll 19 is brought into the pressure contact state, and sealing by the sealing device 30 is started.

  Further, for example, when a seal interruption instruction is detected by the seal interruption instruction detecting means 64 while the PTP sheet 1 is being manufactured by the PTP packaging machine 10, that is, while the seal is being performed by the sealing device 30, The control device 62 drives the arm rotation means 61. Thereby, the arm 33 is rotated and the seal roll 19 is brought into the separated state. Thereafter, preheating control is performed by the control device 62.

  In this embodiment, the control device 62 corresponds to “roll position change control means” and “preheating control means” (“control means”), and the arm 33 and the arm rotation means 61 constitute “roll position change means”. To do.

  As described above in detail, in the present embodiment, the preheating control is executed when the seal start instruction is detected. That is, power is supplied from the AC power source to the coil 51 (lead wire 51a) by the control device 62, and the rotation drive motor 83 of the rotation drive means 81 is driven. Thereby, the roll main body 31 is rotated simultaneously with being heated. Thereby, since an alternating magnetic field acts uniformly with respect to the circumferential direction of the roll main body 31, the temperature nonuniformity which arises in the roll main body 31 at the time of preheating can be eliminated.

  Further, during the preheating control, the control device 62 monitors the temperature change in the circumferential direction of the roll body 31, and if it is determined that the temperature change in the circumferential direction has become sufficiently small, the preheating control is finished. Is done. Then, the arm turning means 61 is driven by the control device 62, the seal roll 19 is brought into a pressure contact state, and sealing by the sealing device 30 is started. Therefore, more stable sealing can be realized at the start of sealing.

  That is, according to the sealing device 30 of the present embodiment, the temperature unevenness generated in the roll body 31 can be eliminated when the roll body 31 of the seal roll 19 is preheated, and more stable at the start of sealing after preheating. A seal can be realized.

  Further, in this embodiment, when a seal interruption instruction is detected while the PTP packaging machine 10 is in operation (while the seal device 30 is in operation), the arm turning means 61 is driven by the control device 62, and the seal roll 19. Is in the above-mentioned separated state, and preheating control is performed. Thereby, the temperature unevenness generated in the roll main body 31 during preheating when the seal is interrupted can be eliminated, and a more stable seal can be realized when the seal is restarted after the seal is interrupted.

  Furthermore, the roll body 31 of the sealing device 19 of the present embodiment is formed with a jacket chamber 35 including a plurality of jacket chamber bodies 36 and a communication portion 37 that communicates each jacket chamber body 36. In such a configuration, the heat medium can be moved in the circumferential direction of the roll body 31, and therefore, when the rotation of the roll body 31 is stopped, temperature unevenness becomes remarkable. In this regard, according to the present embodiment, the roll body 31 is rotated by the preheating control by the control device 62, so that the heat medium is relatively moved with respect to the jacket chamber 35, and the temperature unevenness generated in the roll body 31 is reliably eliminated. can do.

  In the present embodiment, during preheating control, the controller 62 monitors the circumferential temperature change of the roll body 31 based on the information from the temperature sensor 39, and the circumferential temperature change is detected. When it is determined that the temperature has become sufficiently small, the preheating control is terminated. That is, according to the present embodiment, it is possible to appropriately determine whether or not the temperature unevenness generated in the roll body 31 has been eliminated, and as a result, at the start of sealing (and at the time of restart after interruption), more A stable seal can be realized.

  In addition, you may implement as follows, for example, without being limited to the content of description of embodiment mentioned above.

  (A) In the above embodiment, the rotation driving means 81 is provided outside the seal roll 19, but the tip of the arm 33 on the opposite side to the rotation shaft 71 as shown in FIG. In addition, a rotation driving means 91 may be provided. The rotation drive unit 91 includes a rotation drive motor 93 fixed to the arm 33, a drive shaft 94 protruding toward the roll body 31, and a drive gear 95 fixed to the drive shaft 94. In this case, the roll main body 31 is always in mesh with the gear 38 for rotating. The control device 62 shown in FIG. 8 may be configured to drive the rotation drive motor 93 instead of the rotation drive motor 83.

  (B) In the above embodiment, after the seal roll 19 is in the separated state and the gear 38 of the roll body 31 and the drive gear 85 of the rotation drive means 81 are engaged, the controller 62 drives the rotation drive means 81 to rotate. The motor 83 is driven.

  On the other hand, the rotational drive motor 83 of the rotational drive means 81 is always rotating, and when the seal roll 19 is separated and the gear 38 and the drive gear 85 are engaged, the roll body 31 immediately rotates. It may be configured to be driven. In this case, the control of the rotation drive motor 83 by the control device 62 is not necessary.

  (C) In the above embodiment, the roll main body 31 is rotated in the same direction by the rotation drive motor 83. However, for example, inversion drive or rotation drive that reverses the rotation direction when rotated 180 degrees is performed. It is good also as a structure to perform.

  (D) In the above-described embodiment, the jacket chamber 35 filled with the gas-liquid two-phase heat medium is provided in the roll body 31, but the jacket chamber 35 may be omitted. In the above embodiment, the jacket chamber 35 includes the jacket chamber main body 36 and the communication portion 37. However, the configuration in which the communication portion 37 is omitted, that is, the configuration in which each jacket chamber main body 36 exists independently. It is good. Even in such a configuration, the temperature unevenness of the roll body 31 can be eliminated by rotating the roll body 31.

  (E) In the above-described embodiment, the preheat control is performed immediately by the control device 62 when a seal interruption instruction is detected. However, the preheat control may be performed when a predetermined standby time has elapsed. Good.

  This is because the surface temperature of the roll body 31 is soaked immediately after the seal roll 19 is brought into the separated state by the interruption instruction, that is, immediately after the rotation is stopped, and the temperature unevenness of the roll body 31 cannot be ignored. The reason why the preheating control is necessary is because it is considered that a predetermined time has elapsed since the separation state.

  Therefore, if the preheating control is performed when a predetermined standby time has elapsed, the preheating control is performed only when the preheating control is truly necessary, which is economically advantageous.

  (F) In the above-described embodiment, the surface temperature of the roll body 31 is measured using the non-contact type temperature sensor 39. However, for example, the surface temperature of the roll body 31 may be measured using an infrared camera. .

  Moreover, it is good also as a structure which replaces with the structure which measures the surface temperature of the roll main body 31, and complete | finishes preheating control by judging progress of the set preheating time. In this way, the end determination of the preheating control becomes relatively simple, and the control processing of the control device 62 can be simplified.

  (G) In the above-described embodiment, the roll body 31 is rotated while being heated in the preheating control. However, a configuration may be adopted in which heating is performed first and then rotated.

  (H) In the above-described embodiment, the control device 62 controls at least one of the voltage and current supplied to the lead wire 51a, but may control the frequency.

  (I) The roll body 31 may be made of a magnetic material other than iron (for example, nickel or various alloys).

(A) is a perspective view which shows a PTP sheet, (b) is a partial expanded sectional view which shows a PTP sheet. It is a schematic diagram for demonstrating schematic structure of a PTP packaging machine. It is a cross-sectional schematic diagram which shows structures, such as a seal roll. It is a cross-sectional schematic diagram for showing a jacket chamber. It is a cross-sectional schematic diagram which shows an eddy current generation means. It is explanatory drawing which shows a seal roll from the side of a conveyance direction. It is the sectional view on the AA line of FIG. It is a block diagram which shows the electric constitution of a sealing device. It is a cross-sectional schematic diagram which shows structures, such as a seal roll of another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... PTP sheet, 2 ... Pocket part, 3 ... Packaging film, 4 ... Cover film, 5 ... Tablet as filling, 6 ... PTP film, 10 ... PTP packaging machine as a manufacturing apparatus of PTP sheet, 18 ... Film Receiving roll, 19 ... sealing roll, 30 ... sealing device, 31 ... roll body, 32 ... eddy current generating means, 33 ... arm, 34 ... bearing, 35 ... jacket chamber, 36 ... jacket chamber body, 37 ... communication section, 38 ... Gear, 39 ... Temperature sensor as temperature measuring means, 51 ... Coil, 61 ... Arm rotating means, 62 ... Control device as roll position change control means and preheating control means, 63 ... Seal start instruction detecting means, 64 ... Seal interruption instruction detection means, 81, 91... Rotation drive means, 83, 93... Rotation drive motor, 84, 94.

Claims (10)

A film receiving roll having a plurality of recesses capable of accommodating a plurality of pockets formed in a packaging film;
A heatable seal roll provided opposite to the film receiving roll,
The packaging film and the cover film are overlapped with each other so as to close the pocket portion filled with the object to be filled, and passed between the film receiving roll and the sealing roll, thereby allowing the packaging film to pass through the packaging film. A sealing device for attaching a cover film,
The seal roll is
A cylindrical roll body made of a conductor;
Eddy current generating means provided in a fixed state in the roll body, and generating an eddy current by applying an alternating magnetic field to the roll body,
Furthermore, a roll position changing means capable of changing the position of the seal roll between a pressure contact state where the seal roll is pressed against the film receiving roll and a separated state where the seal roll is separated from the film receiving roll;
A seal device comprising: a rotation drive unit capable of rotating at least the roll body of the seal roll brought into the separated state by the roll position changing unit. A film receiving roll having a plurality of recesses capable of accommodating a plurality of pockets formed in a packaging film;
A heatable seal roll provided opposite to the film receiving roll,
The packaging film and the cover film are overlapped with each other so as to close the pocket portion filled with the object to be filled, and passed between the film receiving roll and the sealing roll, thereby allowing the packaging film to pass through the packaging film. A sealing device for attaching a cover film,
The seal roll is
A cylindrical roll body having a jacket chamber made of a conductor and filled with a gas-liquid two-phase heat medium;
Eddy current generating means provided in a fixed state in the roll body, and generating an eddy current by applying an alternating magnetic field to the roll body,
Furthermore, a roll position changing means capable of changing the position of the seal roll between a pressure contact state where the seal roll is pressed against the film receiving roll and a separated state where the seal roll is separated from the film receiving roll;
A seal device comprising: a rotation drive unit capable of rotating at least the roll body of the seal roll brought into the separated state by the roll position changing unit. The sealing device according to claim 2,
The jacket chamber has a plurality of jacket chamber bodies provided inside the roll body,
A sealing device comprising: a communicating portion that communicates the plurality of jacket chamber main bodies. The sealing device according to any one of claims 1 to 3,
Control means for performing heating control of the roll body by the eddy current generating means and rotation driving control of the roll body by the rotation driving means;
Prior to the sealing, the control means preheats the roll body by heating the roll body by the eddy current generation means and rotationally driving the roll body by the rotation driving means in the separated state. A sealing device characterized in that control can be performed. The sealing device according to any one of claims 1 to 3,
A roll position change control means capable of controlling the roll position change means, and at the time of non-sealing, the roll position change control means controls the roll position change means to place the seal roll in the separated state;
further,
A seal start instruction detecting means capable of detecting at least a seal start instruction;
When a seal start instruction is detected by the seal start instruction detection means, in the separated state, the roll body is heated by the eddy current generation means and the roll body is rotated by the rotation drive means. And preheating control means for performing preheating control for preheating the roll body,
When a predetermined preheating end condition is satisfied, the preheating control unit ends the preheating control, and the roll position change control unit controls the roll position change unit to bring the seal roll into the pressure contact state. A sealing device that allows sealing. The sealing device according to claim 5,
Furthermore, at least a seal interruption instruction detection means capable of detecting a seal interruption instruction is provided,
When a seal interruption instruction is detected by the seal interruption instruction detection means, the roll position change control means controls the roll position change means to place the seal roll in the separated state, and the preheating control means A sealing device that performs the preheating control. The sealing device according to claim 6.
The preheating control means executes the preheating control when a predetermined waiting time has elapsed after the seal interruption instruction is detected by the seal interruption instruction detection means. The sealing device according to any one of claims 5 to 7,
A temperature measuring means capable of measuring at least the surface temperature of the roll body or a temperature corresponding thereto;
The sealing device according to claim 1, wherein the preheating control unit determines whether or not the predetermined preheating end condition is satisfied based on a temperature measurement result by the temperature measuring unit. The sealing device according to any one of claims 5 to 7,
The preheating control means determines that the predetermined preheating end condition is satisfied when a set preheating time has elapsed. An apparatus for manufacturing a PTP sheet, wherein the filling material is a tablet, and the sealing apparatus according to any one of claims 1 to 9 is provided.

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