JP5075666B2 - Laminating apparatus and thermocompression conveying apparatus used therefor - Google Patents

Description

  The present invention relates to a laminating apparatus for laminating and laminating a laminate film and a sheet coated with a heat-meltable adhesive, and in particular, a laminating apparatus having a mode in which thermocompression bonding is performed while the laminate film and sheet are conveyed and the laminating apparatus. The present invention relates to an improvement of a thermocompression conveying device.

Examples of conventional laminating apparatuses include those described in Patent Documents 1 and 2.
Patent Document 1 includes a sensor that can detect the temperature of a heating source and the temperature of the laminate film, including a heating source that heats the laminate film and a pair of pressure rollers that press the heated laminate film and the paper sheet. And a technique for controlling the temperature of the heating source based on the output of these sensors is disclosed.
Further, in Patent Document 2, a sheet-like article and a laminate film coated with a heat-meltable adhesive are overlapped and inserted between a pair of rollers having a heating means inside at least one of them, thereby being subjected to thermocompression bonding. A technique is disclosed in which the heat detection means detects that the heating roller is abnormally heated by the heat detection means, and the current of the heating means is interrupted in an integrally formed form.

Japanese Patent No. 3779014 (Embodiment of the Invention, FIGS. 4 to 7) Japanese Patent No. 2901228 (Example, FIG. 3)

However, in Patent Document 1, an infrared heater or a planar heat source is used as the heating source, but a control system (sensor, temperature control device) for the temperature of the heating source is indispensable.
Even in Patent Document 2, since a far-infrared tube heater is used as the heating means, for example, a temperature control system is indispensable for the heating means, and the heating operation by the heating means is runaway when abnormal. Therefore, it is necessary to take countermeasures for detecting abnormalities.
The present invention has been made from the above viewpoints, and should solve the problem of increasing the rising speed of the laminating temperature and maintaining the laminating temperature stably without using a temperature control system for the heat source. Technical issue.

The invention according to claim 1 is a laminating apparatus for laminating and laminating a laminate film and a sheet coated with a hot-melt adhesive, and thermocompression-conveying at least while laminating and conveying the laminate film and sheet. equipped with a device, the thermocompression bonding transport device, the hollow cylinder of the at least one of the crimping conveying member of the hollow roll form is formed and the laminated film and the sheet and sandwiching convey the pair configuration, crimping conveying member of the pair configuration A plate-like heating body that is built in the pressure-bonding conveyance member formed in a shape and includes a plate-like PTC thermistor; and the plate-like heating body is held in contact with the hollow roll-shaped pressure-conduction conveyance member; A laminating apparatus comprising: a heat transfer holding frame capable of transferring heat from a plate-like heating body to a pressure-conveying and conveying member.

According to a second aspect of the present invention, in the laminating apparatus according to the first aspect, the heat transfer holding frame includes a cylindrical storage space having a substantially rectangular cross section in which the plate-like heating body is stored, and the cylindrical storage. A holding cylinder frame in which a peripheral wall part facing the front and back surfaces extending in a direction intersecting the plate thickness direction of the plate-like heating body among the peripheral wall parts partitioning the space is deformed so as to be at least elastically deformable, and the elasticity of the holding cylinder frame A part of the deformable peripheral wall part protrudes outwardly so as to be elastically deformable, and elastically deforms and contacts the inner surface of the hollow part of the crimping and conveying member, and the elastically deformable peripheral wall part of the holding cylinder frame in accordance with the elastic deformation And a heat transfer arm frame that is brought into close contact with the front and back surfaces of the plate-like heating body.
The invention according to claim 3, in the laminating apparatus according to claim 2, wherein the heat transfer holding frame, provided with a heat transfer arm frame at the corners of a substantially rectangular cross-section of the holding tube frame, substantially rectangular holding tube frame The laminating apparatus is characterized in that the heat transfer arm frames are arranged symmetrically with respect to the center line in the width direction of the cross section.
The invention according to claim 4, in the laminating apparatus according to claim 2, wherein the heat transfer holding frame, the width-direction center line of the substantially rectangular cross-section of the holding tube frame said heat transfer arm frame across the holding tube frame Alternatively , the laminating apparatus is characterized by being arranged line-symmetrically or point-symmetrically with respect to the center point in the width direction .
The invention according to claim 5, in the laminating apparatus according to claim 2, the holding cylinder frame of the heat transfer holding frame, and both widthwise side walls of substantially rectangular cross-section with the elastic deformation of the heat transfer arm frame elastic Before the heat transfer arm frame is elastically deformed and brought into contact with the inner surface of the hollow portion of the pressure-conveying and conveying member, the side walls in the width direction are brought into contact with both sides in the width direction of the plate-like heating body. The laminating apparatus is characterized.

The invention according to claim 6 is the laminating apparatus according to claim 1, wherein the thermocompression bonding transport device, wherein formed into pairs crimping conveying member are both hollow roll, plate-like heating body to at least one Is a laminating apparatus characterized in that it is held via a heat transfer holding frame.
The invention according to claim 7 is the laminating apparatus according to 5 any one claims 1, provided downstream of the heat crimping conveying device, a sheet laminated with a laminate film after passing through the thermal compression conveying device A laminating apparatus comprising a pair of conveying members for tensile conveyance.
According to an eighth aspect of the present invention, there is provided the laminating apparatus according to the first aspect, wherein each of the thermocompression-conveying and conveying devices is formed in a roll shape and at least one is formed in a hollow roll shape and sandwiches and conveys the laminated film and the sheet. An upstream crimping conveyance member having a configuration, a downstream crimping conveyance member having a configuration in which both are formed in a downstream shape and sandwiching and transporting a laminate film and a sheet, and upstream of these pairing configurations A belt member that is stretched between the side and downstream side crimping and conveying members, and a plate-like heating body is attached to at least one hollow roll-like upstream side crimping and conveying member of the upstream side crimping and conveying member. The laminating apparatus is characterized in that the laminating apparatus is held by the apparatus.

The invention according to claim 9 is used in a laminating apparatus for laminating and laminating a laminate film and a sheet coated with a hot-melt adhesive, and heat-compresses at least while laminating and transporting the laminate film and sheet. a crimping conveying device, a crimping conveying member pair configuration for holding and conveying the at least one being formed on the hollow cylinder shape and the laminated film and the sheet at a predetermined nip region, of the crimping conveying member of the pair configuration A plate-shaped heating body that is built in a crimping conveyance member formed in a hollow roll shape and includes a plate-like PTC thermistor, and is placed in contact with the hollow roll-shaped crimping conveyance member and held by the plate-shaped heating body And a heat transfer holding frame capable of transmitting heat from the plate-shaped heating body to the pressure-bonding and conveying member.

According to the first aspect of the present invention, the plate-like heating body using the PTC thermistor is used as a heat source, and is held in the hollow portion of the crimping conveyance member by the heat transfer holding frame and heat from the heat source is supplied to the crimping conveyance member. Since it is transmitted, the rising speed of the laminate temperature can be increased and the laminate temperature can be stably maintained without using a temperature control system for the heat source.
That is, the following basic effects can be obtained.
The self-temperature control function of the plate-shaped heating element using a PTC thermistor allows the target lamination temperature to be maintained without overheating without using a temperature control system (temperature sensor, temperature controller, temperature control device). it can. Furthermore, since the self-temperature control is performed by continuously changing the resistance value as compared with the on / off intermittent control by the temperature controller, the fluctuation of the heat generation temperature can be suppressed small.
Also, based on the temperature characteristics of the plate-like heating element using a PTC thermistor, the rising speed of the laminate temperature is fast, and since it does not exceed the set temperature, energy saving can be realized and countermeasures for abnormal conditions should be taken. Is unnecessary.
Furthermore, since the plate-like PTC thermistor generates heat over the entire surface, there is little temperature unevenness and there is no partial temperature change, so that it is possible to achieve a soaking effect by the thermocompression conveying device.

According to the invention which concerns on Claim 2, the holding | maintenance function of the plate-shaped heating body using a PTC thermistor and the heat transfer function from a plate-shaped heating body to a crimping conveyance member of a hollow roll shape are easily realizable.
According to the invention which concerns on Claim 3, the heat from the front and back single side | surface of a plate-shaped heating body can be transmitted to a hollow roll-shaped crimping conveyance member substantially equally.
According to the invention which concerns on Claim 4, the heat from the front and back both surfaces of a plate-shaped heating body can be transmitted to a hollow roll-shaped crimping conveyance member substantially equally.
According to the invention of claim 5, the heat transfer holding frame is mounted on the crimping conveyance member in such a manner that both side walls in the width direction of the substantially rectangular cross section of the holding cylinder frame are elastically deformed along with the elastic deformation of the heat transfer arm frame. Before the operation, the both side walls in the width direction of the holding cylinder frame are in contact with the both sides in the width direction of the plate-shaped heating body so that the plate-shaped heating body in the hollow portion of the pressure-bonding conveyance member is positioned at the center of the pressure-bonding conveyance member. They are arranged approximately symmetrically. Therefore, the disposition position of the plate-like heating body in the crimping conveyance member is kept substantially constant.

According to the invention which concerns on Claim 6, the typical aspect of a thermocompression-bonding conveying apparatus is easily realizable.
According to the invention of claim 7, since the sheet immediately after being laminated by the thermocompression conveying apparatus is pulled and conveyed by the conveying member, it is possible to effectively avoid the concern that the laminated sheet is wrinkled. Can do.
According to the invention which concerns on Claim 8, the laminated | stacked sheet | seat can be conveyed stably.
According to the ninth aspect of the invention, a laminating apparatus that can increase the rising speed of the laminating temperature and maintain the laminating temperature stably without using the temperature control system for the heat source is easily constructed. be able to.

Outline of Embodiment FIG. 1 shows an outline of an embodiment of a laminating apparatus to which the present invention is applied.
In the figure, a laminating apparatus is one in which a laminating film 11 and a sheet 12 to which a hot melt adhesive is applied are stacked and bonded together, and at least the laminating film 11 and the sheet 12 are stacked and conveyed while being thermocompression bonded. A thermocompression conveying device 10 is provided.
The thermocompression conveying apparatus 10 includes a pair of pressure-conveying and conveying members 1 (for example, 1a and 1b), at least one of which is formed in a hollow roll shape and sandwiching and conveying the laminate film 11 and the sheet 12, and a pair of pressure-bonding and conveying apparatuses. A plate-shaped heating body 2 that is incorporated in a pressure-conveying and conveying member 1 (1a, 1b in this example) formed in a hollow roll shape among the members 1 and includes a plate-shaped PTC thermistor, and the above-described hollow-roll-shaped pressure conveying member 1 (1a, 1b in this example) and a heat transfer holding frame 3 that holds the plate-like heating body 2 and can transfer heat from the plate-like heating body 2 to the pressure-conveying and conveying member 1. Have.

In such technical means, since the laminating apparatus of the present embodiment is intended for at least the one provided with the thermocompression conveying apparatus 10, an aspect in which the crimping conveying apparatus and the heating apparatus are provided separately (for example, a pair of inlets) A mode in which a heating device is provided as an independent element between the conveying member and the paired outlet conveying member is not included.
In the present embodiment, the thermocompression conveying device 10 only needs to include a paired crimping conveying member 1 (1a, 1b) in which at least one is formed in a hollow roll shape. Here, as the paired crimping conveyance member 1 (1a, 1b), both may be roll-shaped members, one is a hollow roll-shaped member, and the other is pressurized and arranged on the hollow roll-shaped member. Further, a pair of roll-shaped crimping conveyance members 1 may be arranged along the sheet conveyance direction, and the belt members are bridged between the respective roll-shaped crimping conveyance members 1. Alternatively, at least one of the upstream-side roll-shaped crimping conveyance member 1 may be a hollow roll-shaped member, and the plate-shaped heating body 2 may be incorporated. Note that this embodiment includes a mode in which the plate-like heating body 2 and the heat transfer holding frame 3 are incorporated only into either one of the paired crimping and conveying members 1 which are hollow roll-shaped members.
Furthermore, the thermocompression conveying device 10 may have at least one paired crimping conveying member 1 in which the plate-like heating body 2 and the heat transfer holding frame 3 are incorporated in at least one of them. From the standpoint of speeding up, the plate-like heating body 2 and the heat transfer holding frame 3 are incorporated in each of a plurality of pairs of crimping conveying members 1, and the thermocompression processing necessary for the laminating process in a plurality of stages. May be applied.
Furthermore, as a laminating apparatus, it is needless to say that elements other than the thermocompression conveying apparatus 10 may be added. For example, from the viewpoint of effectively avoiding generation of wrinkles in the laminated sheet 12, the thermocompression conveying device 10 is provided on the downstream side of the thermocompression conveying device 10 and passes through the thermocompression conveying device 10. Examples include a pair of conveyance members 13 that pull and convey a sheet 12 that is later laminated with a laminate film 11. Further, a guide member for guiding and conveying the laminate film 11 and the sheet 12 may be provided before and after the thermocompression conveying device 10 and the paired conveying member 13.

Further, the plate-like heating body 2 may be appropriately selected as long as it includes a plate-like PTC thermistor.
The plate-shaped heating element 2 may be configured to have a long plate-shaped PTC thermistor, but a plurality of relatively short PTC thermistors are used side by side in accordance with the size of use of the sheet 12 and the laminate film 11. This method is widely used.
Here, as a typical mode of the plate-like heating body 2, an electrode is provided on the front and back surfaces of the PTC thermistor so that current can be applied, and the PTC thermistor and the electrode are covered with an insulating cover to prevent leakage. Is mentioned.
Furthermore, the heat transfer holding frame 3 needs to have a holding function of the plate-like heating body 2 and a heat transfer function from the plate-like heating body 2.
The heat transfer holding frame 3 is preferably made of a metal having good heat transfer properties (for example, aluminum). In addition, in order to keep the holding function and heat transfer performance of the plate heating body 2 good, plate heating It is preferable that the body 2 is disposed in close contact with at least the heat generating surface.
Here, as a typical aspect of the heat transfer holding frame 3, the cylindrical housing space having a substantially rectangular cross section in which the plate-like heating body 2 is accommodated and the peripheral wall portion defining the cylindrical accommodation space is the above-mentioned. The holding cylinder frame 5 in which the peripheral wall portions facing the front and back surfaces extending in the direction intersecting the plate thickness direction of the plate-like heating body 2 are at least elastically deformable, and the elastically deformable peripheral wall portion of the holding cylinder frame 5 It protrudes outwardly from a part so as to be elastically deformable, and is elastically deformed and brought into contact with the inner surface of the hollow portion of the pressure-conveying and conveying member 1. What has the heat-transfer arm frame 6 made to closely contact the front and back of the body 2 is mentioned.

In such a heat transfer holding frame 3, from the viewpoint of equalizing heat transfer performance, the heat transfer holding frame 3 includes the heat transfer arm frame 6 at the corners of the substantially rectangular cross section of the holding cylinder frame 5. provided with, and that arranged heat transfer arm frame 6 axisymmetric with respect to the width direction center line of the substantially rectangular cross-section of the holding tube frame 5, a substantially rectangular cross-section of the holding cylinder frame 5 sandwiching the holding cylinder frame 5 It is preferable that the heat transfer arm frame 6 is arranged line-symmetrically or point-symmetrically with respect to the width direction center line or the width direction center point .
Further, from the viewpoint of maintaining good holding position accuracy of the plate-like heating body 2 by the heat transfer holding frame 3, the holding cylinder frame 5 of the heat transfer holding frame 3 is heated at both side walls in the width direction of a substantially rectangular cross section. It is elastically deformed along with the elastic deformation of the transmission arm frame 6, and before the heat transfer arm frame 6 is elastically deformed and brought into contact with the inner surface of the hollow portion of the crimping conveying member 1, the both side walls in the width direction are plates. It is preferable that it is an aspect which contacts the width direction both sides of the cylindrical heating body 2. FIG.
In this case, as the heat transfer arm frame 6 is elastically deformed and brought into contact with the inner surface of the hollow portion of the crimping and conveying member 1, both side walls in the width direction of the holding cylinder frame 5 are in the width direction of the plate-like heating body 2. It may be in a state of being in contact with both side portions or may be in a non-contact arrangement state. However, from the viewpoint of protecting the plate-like heating body 2, both sides of the holding cylinder frame 5 in the width direction are accompanied by the elastic deformation of the heat transfer arm frame 6 and contact with the inner surface of the hollow portion of the crimping conveyance member 1. It is preferable that the wall portion is designed to be elastically deformed in a direction away from both widthwise side portions of the plate-like heating body 2.

Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.
Embodiment 1
-Laminator-
2 and 3 show Embodiment 1 of a laminating apparatus to which the present invention is applied.
In the figure, a laminating apparatus 20 includes a thermocompression conveying apparatus 21 that performs thermocompression bonding while laminating a laminate film 101 and a sheet 102 and a pair disposed on the downstream side of the thermocompression conveying apparatus 21 in the sheet conveying direction. It is configured to be supported by a support side plate 25 of the housing.
In the present embodiment, the thermocompression conveying device 21 is composed of a pair of thermocompression conveying rollers 30 (specifically, 30a and 30b).
The thermocompression-conveying roll 30 having a pair structure is formed in a hollow roll shape, and has a pairing-compressing conveyance roll 31 that sandwiches and conveys the laminate film 101 and the sheet 102, and a heater incorporated in the pressure-conveying roll 31. An assembly 40 and a heat transfer holding frame 50 that holds the heater assembly 40 and transmits heat from the heater assembly 40 to the pressurizing and conveying roll 31 are provided.

<Crimping conveyance roll>
In the present embodiment, as shown in FIG. 3, the paired crimping conveyance roll 31 has a hollow roll body 32 made of a metal (for example, aluminum) having a good heat transfer property, for example. An elastic layer 33 made of an elastic material (e.g., silicon rubber) is coated on the surface, both are pressed against each other by a biasing force of a biasing spring (not shown), and a predetermined nip area n is secured between the two. In this nip area n, the laminate film 101 and the sheet 102 are nipped and conveyed.

<Heater assembly>
Further, as shown in FIGS. 3 to 5, the heater assembly 40 includes a plurality of (for example, five) plate-like PTC thermistors 41 (specifically 41a to 41e) arranged in the length direction, and each PTC is disposed. Long plate-like electrodes 42 and 43 are arranged on the front and back surfaces of the thermistor 41 via a conductive adhesive layer 44, and these are entirely covered with an insulating cover 45 made of polyimide resin, for example. In FIG. 5, reference numeral 46 denotes an extraction terminal provided at the longitudinal end of each of the electrodes 42 and 43.
In the present embodiment, the insulating cover 45 is for avoiding a situation in which current leaks to the outside when a voltage is applied to the PTC thermistor 41 (41a to 41e). For example, the insulating cover 45 may be formed in a thin film shape. For example, it is preferable to wrap around several layers so as to obtain a desired insulating property.

<Electrical characteristics of PTC thermistor>
Here, the electrical characteristics of the PTC thermistor 41 will be briefly described.
This PTC thermistor (Positive Temperature Coefficient Thermistor) is a semiconductor ceramic mainly composed of barium titanate (BaTiO ₃ ), and the Curie temperature can be set arbitrarily depending on the material composition, and the electrical resistance increases rapidly from this temperature. It has properties.
That is, as shown in FIG. 6, the PTC thermistor 41 self-heats by Joule heat when a voltage is applied, and its resistance value increases logarithmically when the Curie temperature Tc is exceeded.
When the resistance value increases, the heat generation temperature decreases because the current decreases and the power is suppressed. And if resistance value falls, an electric current will increase, and since electric power will increase again, exothermic temperature will rise. By repeating this operation, it works as a constant temperature heating element having a self-temperature control function.
Since the Curie temperature Tc of the PTC thermistor 41 and the surface temperature of the heater assembly 40 do not always coincide with each other, it is preferable to confirm the relationship between the Curie temperature Tc of the PTC thermistor 41 and the surface temperature of the heater assembly 40 in advance.

<Heat transfer holding frame>
As shown in FIGS. 7A and 7B, the heat transfer holding frame 50 includes a holding cylinder frame 51 having a cylindrical housing space having a substantially rectangular cross section in which the plate-like heater assembly 40 is housed, and this holding. A heat transfer arm frame 55 that is provided integrally with the cylinder frame 51 and transmits heat from the heater assembly 40 to the pressure-conveying and conveying roll 31, and is made of, for example, extruded with a metal such as aluminum having good heat transfer and workability. Molded.
Here, the holding cylinder frame 51 has a peripheral wall portion 52 in which a cylindrical housing space having a substantially rectangular cross section is defined, and a cut 53 having a substantially circular cross section is formed in each inner corner portion of the peripheral wall portion 52. Due to the presence of the notches 53, the peripheral wall portions 52 are deformed so as to be elastically deformable. In particular, in this example, in a state before the heat transfer holding frame 50 is mounted in the crimping conveyance roll 31, the peripheral wall portions 52a corresponding to the front and back surfaces of the heater assembly 40 of the holding cylinder frame 51 are arranged substantially in parallel. On the other hand, the peripheral wall part 52b corresponding to the width direction of the substantially rectangular cross section of the heater assembly 40 of the holding cylinder frame 51 is disposed so as to be slightly curved.

The heat transfer arm frame 55 includes a protruding piece 56 that protrudes outwardly from the outer corner portion of the peripheral wall portion 52 of the holding cylinder frame 51 so as to be elastically deformable, and the heat transfer holding frame 50 is mounted in the crimping conveyance roll 31. In the state before being carried out, the protruding piece 56 is maintained in a curved shape so as to protrude outward from the circular locus s of the inner surface of the hollow portion 35 (see FIG. 8) of the pressure-conveying and conveying roll 31. A gap 57 is secured between the tips of 56 so that the protruding piece 56 can be elastically deformed along the circular locus s.
In the present embodiment, the protruding pieces 56 of the heat transfer arm frame 55 are arranged symmetrically with respect to the center line k in the width direction of the substantially rectangular cross section of the holding cylinder frame 51, and the holding cylinder frame 51 is They are arranged line-symmetrically (or point-symmetrically).

Furthermore, as shown in FIG. 7, the heater assembly 40 is inserted into the cylindrical housing space in the holding cylinder frame 51 of the heat transfer holding frame 50 as shown in FIG. The frame 50 is incorporated in the hollow portion 35 of the pressure-bonding conveyance roll 31.
At this time, the protruding piece 56 of the heat transfer arm frame 55 of the heat transfer holding frame 50 is elastically deformed in the direction of the arrow M along the circular trajectory s of the hollow portion 35 of the pressurizing and conveying roll 31, and the hollow portion of the pressurizing and conveying roll 31. 35 is arranged in contact with the inner surface.
In this state, the peripheral wall portion 52 a corresponding to the front and back surfaces of the heater assembly 40 in the peripheral wall portion 52 of the holding cylinder frame 51 of the heat transfer holding frame 50 is accompanied by elastic deformation of the protruding piece 56 of the heat transfer arm frame 55. It is pressed in the direction of the arrow P through the cut 53 and elastically deformed, and is closely arranged on the front and back surfaces of the heater assembly 40.
On the other hand, of the peripheral wall portion 52 of the holding cylinder frame 51 of the heat transfer holding frame 50, the peripheral wall portion 52b corresponding to the cross-sectional width direction of the heater assembly 40 is cut in accordance with the elastic deformation of the protruding piece 56 of the heat transfer arm frame 55. It is slightly elastically deformed toward the inner surface side of the hollow portion 35 of the pressure-conveying and conveying roll 31 through the 53 portion.
In this case, since the heater assembly 40 is elastically held by the peripheral wall portion 52a of the holding cylinder frame 51 of the heat transfer holding frame 50, the heater assembly 40 moves unnecessarily within the holding cylinder frame 51 of the heat transfer holding frame 50. There is no concern. Further, since the peripheral wall portion 52b of the holding cylinder frame 51 is elastically deformed in a direction away from both side wall portions of the heater assembly 40, the holding cylinder frame 51 applies an unnecessarily large load to both side wall portions of the heater assembly 40. There is no concern that the heater assembly 40 will be damaged.
In particular, when the width direction dimension of the outer surface of the insulating cover 45 of the heater assembly 40 is w and the width direction dimension of the cylindrical housing space of the holding cylinder frame 51 of the heat transfer holding frame 50 is m, Before assembling the heater assembly 40 and the heat transfer arm frame 55, if w≈m, both side portions in the cross-sectional width direction of the heater assembly 40 come into contact with the peripheral wall portion 52b of the holding cylinder frame 51. The frame 50 is positioned at a symmetrical position with respect to the center line k.

-Transport roll-
As shown in FIGS. 2 and 3, the paired transport rolls 22 (specifically 22 a and 22 b) have a hollow roll body 62 made of, for example, aluminum, and an elastic material (on the surface of the roll body 62 ( An elastic layer 63 made of, for example, silicon rubber) is coated and formed, and both are pressed against each other by a biasing force of a biasing spring (not shown) to secure a predetermined nip area n between the two. Thus, the laminate film 101 and the sheet 102 are nipped and conveyed.
Here, the distance x between the nip area n of the thermocompression conveying roll 30 and the nip area n of the conveying roll 22 of the thermocompression conveying apparatus 21 is set to be shorter than the minimum use size sheet 102, and A guide member 26 for guiding the laminated sheet 102 to the nip region n of the transport roll 22 is provided in the sheet transport path between the thermocompression transport roll 30 and the transport roll 22.

-Drive system-
In the present embodiment, as shown in FIGS. 2 and 9, the driving system of the laminating apparatus 20 directly transmits the driving force from the driving motor 70 to one of the rolls 22b of the pair of conveying rolls 22 to transmit the driving force. It transmits to one roll 30b of the thermocompression-bonding conveyance roll 30 of the thermocompression-bonding conveyance apparatus 21 via the gear train 86, and further, one drive transmission gear train 87 provided on the opposite side in the axial direction of the conveyance roll 22 is used. The driving force transmitted to the conveyance roll 22b is transmitted to the other conveyance roll 22a, and one thermocompression conveyance roll 30b is provided via a drive transmission gear train 88 provided on the opposite side of the thermocompression conveyance roll 30 in the axial direction. Is transmitted to the other thermo-compression conveying roll 30a.
Here, in FIG. 9, if the peripheral speed of the thermocompression-bonding transport roll 30 is v ₁ and the peripheral speed of the transport roll 22 is v ₂ , the drive transmission system is adjusted to satisfy the relationship of v ₂ > v ₁ slightly. The laminated sheet 102 that has passed through the thermocompression conveying roll 30 is pulled and conveyed to the conveying roll 22.

-Support structure and current-carrying structure of thermocompression-conveying roll-
For example, the support structure of the thermocompression carrying roll 30 of the thermocompression carrying apparatus 21 is as follows.
That is, as shown in FIGS. 2 and 10, the support structure of the thermocompression conveying roll 30 is provided with insulating support shafts 71 made of, for example, phenolic resin at both ends of the crimping conveyance roll 31. Is supported on the support side plate 25 via a bearing 72.
In addition, the energization structure of the thermocompression conveying roll 30 has a through hole 73 in the insulating support shaft 71, and a terminal 46 (or 43) of the electrode 42 (or 43) of the heater assembly 40 on one side of the through hole 73. 5), a conductive pipe 74 is provided on the other side of the through hole 73, and the terminal 46 and the conductive pipe 74 are connected by a connection wire 75, and one end of the conductive pipe 74 is provided. The conductive brush 77 is pressed only against the urging spring 78 as the energizing unit 76, and the voltage from the power source 80 (in this example, the AC bias from the AC power source 82) is applied to the conductive brush 77 to turn on / off the operation switch 85. It is applied by operation. Note that the power supply 80 is not necessarily limited to an aspect using an AC bias, and may be an aspect using a DC bias or an AC bias superimposed with a DC bias.

Next, the operation of the laminating apparatus according to this embodiment will be described.
First, before describing the operation of the laminating apparatus according to the present embodiment, the operation of the laminating apparatus according to the comparative embodiment will be described.
FIG. 11A shows an example of a laminating apparatus according to a comparative embodiment.
In the figure, a laminating apparatus 200 according to a comparative embodiment includes a pair of thermocompression conveying rolls 300 and a conveying roll 220 that pulls and conveys the laminated sheet 102 that has passed through the thermocompression conveying rolls 300. The pressure-conveying roll 300 includes, for example, a heat roll 302 such as a halogen lamp as a heat source in a pressure-conveying roll 301 having a hollow roll shape.
Then, in order to detect the surface temperature of the thermocompression conveying roll 300, contact type or non-contact type temperature sensors 311 and 312 are arranged facing the surface of the thermocompression conveying roll 300, and the temperature controller 320 is provided with a temperature sensor. The detection information from 311 and 312 is taken in, and the heat lamp 302 is on / off controlled by temperature controllers 331 and 332 such as bimetals.

In this comparison form, the temperature control system (temperature sensor, temperature controller, temperature control device) is indispensable, and the device configuration is complicated.
In particular, in the embodiment using the contact-type temperature sensor, since the thermocompression transport roll 300 is in contact with the thermocompression transport roll 300, the thermocompression transport roll 300 is easily damaged, and in some cases, the laminated sheet is also scratched. There is a fear.
In addition, since the temperature sensor is constantly in contact with the thermocompression conveying roll 300, it is likely to be deformed or disconnected, or to cause a failure.
Further, when used for a long period of time, there is a possibility that the heat-melt adhesive of the laminate film adheres to the thermocompression conveying roll 300 and accurate temperature detection cannot be performed.
On the other hand, in a mode in which a non-contact type temperature sensor (for example, an infrared sensor) is used, there is no problem like the contact type temperature sensor, but the non-contact type temperature sensor requires a combination with an amplifier. Not only is it expensive, but when dust adheres to the detection surface, accurate temperature detection is not possible, and it tends to shift to a temperature higher than the target laminating temperature, resulting in poor laminate finish, and jammed and laminated sheets There is a concern to break.
Further, since the heating by the heat lamp 302 is performed via the air layer in the thermocompression conveying roll 300, the rising speed is slow, and if the heat lamp 302 breaks down, it is heated to an abnormal temperature. It is necessary to take measures.
Furthermore, since the lamination temperature is adjusted by intermittent control of on / off by the temperature controller, it takes time to reach the lamination temperature after overheating and reach a stable temperature distribution, and there is a concern that the fever temperature fluctuates greatly. .

On the other hand, in the present embodiment, as shown in FIGS. 10 and 11B, when the operation switch 85 is turned on when the laminating apparatus 20 is used, the voltage composed of the AC bias of the DC superimposition from the power supply 80 becomes conductive. The heat is applied to the heat assembly 40 through the brush 77 and the conductive pipe 74.
Then, current flows through each PTC thermistor 41 to generate heat, and the heat from the heat assembly 40 is mainly the peripheral wall portion 52a of the holding cylinder frame 51 of the heat transfer holding frame 50 made of metal having good heat transfer properties, and the heat transfer arm. It is efficiently transmitted to the crimping conveyance roll 31 through the frame 55.
At this time, the rising speed of the temperature Th of the heat assembly 40 using the PTC thermistor 41 is fast, and when the Curie temperature Tc is reached, the resistance value immediately increases, so that current does not flow easily and heat generation of the heat assembly 40 is suppressed. .
For this reason, the surface temperature Ts of the thermocompression conveyance roll 30 stably reaches a predetermined laminating temperature without overheating.
Thus, in the present embodiment, the self-temperature control function of the heat assembly 40 using the PTC thermistor 41 without using the temperature control system (temperature sensor, temperature regulator, temperature control device) as in the comparative embodiment. It can be easily controlled based on
Further, since the PTC thermistor 41 generates heat over the entire surface, there is no concern that the heat generation distribution varies.
Further, since the temperature of the heat assembly 40 does not rise excessively, it is not necessary to consider the situation in which the thermocompression conveying roll 30 is abnormally heated, and it is not necessary to consider countermeasures in case of an abnormality as in the comparative embodiment.
In particular, in the present embodiment, since the paired thermocompression-conveying rolls 30 each have a heat source, the present invention is also effectively applied to an aspect in which the laminate film 101 is laminated and pasted on the front and back surfaces of the sheet 102.
Further, in the present embodiment, the heat transfer holding frame 50 is configured to transmit heat to substantially the entire area of the hollow portion 35 of the press-bonding / conveying roll 31, so that the surface temperature distribution of the entire peripheral surface of the thermo-compressing / conveying roll 30. Is kept substantially uniform.

Embodiment 2
FIG. 12 shows an outline of Embodiment 2 of a laminating apparatus to which the present invention is applied.
In the figure, a laminating apparatus 20 is a thermocompression conveying apparatus 21 as a thermocompression conveying apparatus 21 (specifically, 30 (1), 30 (2), 30 (30 (1), 30 (2), 30 (3)). 3)) is arranged, and a pair of conveying rolls 22 on which the laminated sheet 102 is pulled and conveyed on the downstream side in the sheet conveying direction are arranged.
Here, each thermocompression conveying roll 30 is configured in the same manner as in the first embodiment, and a guide member 26 for guiding the laminated sheet 102 between each thermocompression conveying roll 30 and the conveying roll 22. Is provided as necessary. Components similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted here.
According to the present embodiment, since a plurality of pairs of thermocompression-conveying rolls 30 are provided, the laminating process for the laminating film 101 and the sheet 102 can be divided and realized. The laminating process can be realized at a higher speed.

Embodiment 3
FIG. 13 shows an outline of Embodiment 3 of a laminating apparatus to which the present invention is applied.
In the same figure, the laminating apparatus 20 is different from the first and second embodiments, for example, each of which is formed in a hollow roll shape and has a paired upstream side pressure-conveying and conveying roll 91 (nipping and conveying the laminate film 101 and the sheet 102). Specifically, 91a, 91b) and a downstream-side pressure-conveying and conveying roll 92 (specifically, a pair of downstream-side pressure-conveying rolls that are provided on the downstream side and are formed in a roll shape and sandwich and convey the laminate film 101 and the sheet 102) 92a, 92b) and belt members 93 (specifically, 93a, 93b) made of polyimide resin or the like, which are stretched between the upstream and downstream crimping conveyance rolls 91, 92 of these pairs. For example, the heater assembly 40 is held via the heat transfer holding frame 50 on the upstream-side crimping conveyance roll 91 having a pair configuration.
In the present embodiment, the upstream-side pressurizing and transporting roll 91 substantially functions as a thermocompression-bonding and transporting roll, and the laminated sheet 102 that has passed through the upstream-side pressurizing and transporting roll 91 is sandwiched between the belt members 93 (93a, 93b). After being conveyed in this state, it is discharged via a downstream pressure-bonding conveyance roll 92.
At this time, the laminating process by the upstream side pressurizing and conveying roll 91 is suitably performed in substantially the same manner as in the first embodiment.

It is explanatory drawing which shows the outline | summary of the laminating apparatus which concerns on embodiment to which this invention is applied. It is explanatory drawing which shows the principal part structure of the laminating apparatus which concerns on Embodiment 1. FIG. FIG. 3 is a cross-sectional explanatory view corresponding to the line III-III in FIG. 2. It is principal part cross-sectional explanatory drawing along the axial direction of the thermocompression-bonding conveyance roll used in Embodiment 1. FIG. (A) is the heater assembly used in Embodiment 1, (b) is a principal part exploded explanatory drawing of a heater assembly. It is explanatory drawing which shows an example of the resistance-temperature characteristic of the PTC thermistor used with a heater assembly. (A) is explanatory drawing which shows the heater assembly and heat transfer holding | maintenance frame used in Embodiment 1, (b) is explanatory drawing which shows the assembly | attachment state of both. It is explanatory drawing which shows the assembly | attachment state to the crimping | compression-conveying roll of the heater assembly which is the thermocompression-bonding conveying roll component used in Embodiment 1, and a heat transfer holding frame. It is. 3 is an explanatory diagram schematically showing a drive transmission system of the laminating apparatus according to Embodiment 1. FIG. It is explanatory drawing which shows an example of the rotation structure of the thermocompression conveyance roll used in Embodiment 1, and the electricity supply structure to a heater assembly. (A) is explanatory drawing which shows an example of the temperature control operation | movement of the lamination apparatus which concerns on a comparison form, (b) is explanatory drawing which shows the temperature control operation example of the lamination apparatus which concerns on Embodiment 1. FIG. It is explanatory drawing which shows the outline | summary of the laminating apparatus which concerns on Embodiment 2. FIG. It is explanatory drawing which shows the outline | summary of the laminating apparatus which concerns on Embodiment 3. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 (1a, 1b) ... Crimp conveyance member, 2 ... Plate-shaped heating body, 3 ... Heat transfer holding frame, 5 ... Holding cylinder frame, 6 ... Heat transfer arm frame, 10 ... Thermo-compression conveyance apparatus, 11 ... Laminate film, 12 ... sheet, 13 ... conveying member

Claims (9)

In a laminating apparatus for laminating and laminating a laminate film and a sheet coated with a hot-melt adhesive,
Comprising a thermocompression conveying device for thermocompression bonding at least while laminating and conveying the laminate film and sheet;
This thermocompression transport device is a pair of press transport members that are formed in a hollow roll shape and sandwich and transport the laminate film and sheet,
A plate-like heating member including the PTC thermistor and is incorporated in the crimping conveying member formed in a hollow roll-shaped plate-like of the crimping conveying member of the pair configuration,
And a heat transfer holding frame that is disposed in contact with the hollow roll-shaped crimping conveyance member, holds the plate-like heating body, and can transfer heat from the plate-like heating body to the crimping conveyance member. Laminating equipment. The laminating apparatus according to claim 1, wherein
The heat transfer holding frame includes a cylindrical housing space having a substantially rectangular cross section in which the plate-like heating body is housed, and a thickness direction of the plate-like heating body in a peripheral wall portion defining the cylindrical housing space A peripheral wall portion facing the front and back surfaces extending in a direction intersecting with the holding cylindrical frame that is at least elastically deformable, and protrudes outwardly from a portion of the elastically deformable peripheral wall portion of the holding cylindrical frame so as to be elastically deformable. A heat transfer arm frame that elastically deforms and contacts the inner surface of the hollow portion of the pressure-conveying and conveying member, and that the elastically deformable peripheral wall portion of the holding cylinder frame is brought into close contact with the front and back surfaces of the plate-like heating body. A laminating apparatus comprising: The laminating apparatus according to claim 2, wherein
Said heat transfer holding frame, provided with a heat transfer arm frame at the corners of a substantially rectangular cross-section of the holding tube frame, a line symmetrical heat transfer arm frame relative to the width direction center line of the substantially rectangular cross-section of the holding tube frame A laminating apparatus, characterized in that it is arranged in the above. The laminating apparatus according to claim 2, wherein
It said heat transfer holding frame, line symmetry or point-symmetrically arranged with respect to the width direction center line or the widthwise center point of the substantially rectangular cross-section of the holding tube frame said heat transfer arm frame across the holding tube frame A laminating apparatus characterized by being made. The laminating apparatus according to claim 2, wherein
Holding tube frame of the heat transfer holding frame, which both widthwise side walls of substantially rectangular cross-section is elastically deformed along with the elastic deformation of the heat transfer arm frame,
Before the heat transfer arm frame is elastically deformed and brought into contact with the inner surface of the hollow portion of the pressure-conveying and conveying member, the both side walls in the width direction come into contact with both sides in the width direction of the plate-like heating body. The laminating apparatus according to claim 1, wherein
The thermal compression transfer apparatus, the formed into pairs crimping conveying member are both hollow roll, and wherein the plate-like heating body to at least either one is obtained by holding through the heat transfer holding frame Laminating equipment. The laminating apparatus according to any one of claims 1 to 5 ,
Disposed downstream of the heat crimping conveying device, a laminating apparatus is characterized in that a transport member of laminated sheet tensile conveying pair constituted by the laminate film after passing through the thermocompression bonding conveying device. The laminating apparatus according to claim 1, wherein
The thermocompression conveying device is a pair of upstream crimping conveying members each having a roll shape and at least one of which is formed in a hollow roll shape and sandwiching and conveying a laminate film and a sheet. A pair of downstream crimping conveyance members that are formed in a roll shape and sandwich and convey the laminate film and sheet, and belt members that are respectively spanned between the upstream and downstream crimping conveyance members of these paired configurations. Have
A laminating apparatus characterized in that a plate-like heating body is held via a heat transfer holding frame on at least one hollow roll-shaped upstream crimping / conveying member of the upstream crimping / conveying member. It is used in a laminating apparatus for laminating and laminating a laminate film and a sheet coated with a hot-melt adhesive, and is a thermocompression conveying apparatus for thermocompression bonding while conveying at least the laminating film and sheet,
A pressure-sensitive conveying member having a pair structure in which at least one is formed in a hollow roll shape and sandwiches and conveys the laminate film and the sheet in a predetermined nip region;
A plate-like heating member including the PTC thermistor and is incorporated in the crimping conveying member formed in a hollow roll-shaped plate-like of the crimping conveying member of the pair configuration,
And a heat transfer holding frame that is disposed in contact with the hollow roll-shaped crimping conveyance member, holds the plate-like heating body, and can transfer heat from the plate-like heating body to the crimping conveyance member. Thermocompression transfer device.

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