JP5902987B2 - Laminating equipment - 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 more particularly to an improvement of a laminating apparatus in a mode of thermocompression bonding while transporting a laminate film and sheet.

Examples of conventional laminating apparatuses include those described in Patent Documents 1 and 2.
Patent Document 1 includes a heating heat source for heating a laminate film, and a pair of pressure rollers for pressing the heated laminate film and a paper sheet, and can detect the temperature of the heating heat source and the temperature of the laminate film. And a technology for controlling the temperature of the heating heat 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 a heating heat source. However, a temperature control system for the heating heat source, specifically, a temperature detector for detecting temperature and the temperature detection. A temperature control device that controls the heating heat source based on the temperature information detected by the vessel is indispensable.
Further, even in Patent Document 2, since a far-infrared tube heater is used as the heating means, for example, a temperature control system (temperature detector, temperature control device) is indispensable for the heating means. There is a concern that the heating operation by the heating means may run away at the time of abnormality, and it is also necessary to take an abnormality countermeasure to detect the abnormality.

  The technical problem to be solved by the present invention is to increase the rising speed of the laminating temperature without using a temperature detector, and to stably perform the laminating process immediately after the rising of the laminating temperature.

  The invention according to claim 1 is a laminating apparatus for laminating and laminating a laminate film and a sheet coated with a heat-meltable adhesive, wherein at least the laminating film and the sheet are thermocompression bonded while being conveyed. A pressure-bonding conveyance device and a control device for controlling the thermo-compression conveyance device, wherein the thermo-compression conveyance device has a pair configuration in which at least one is formed in a hollow roll shape and sandwiches and conveys the laminate film and the sheet. A crimp heating member, a plate-like heating body including a PTC thermistor built in a crimping conveyance member formed in a hollow roll shape among the paired crimping conveyance members, and a contact arrangement in the crimping conveyance member in the hollow roll shape And a heat transfer holding frame that holds the plate-like heating body and can transfer heat from the plate-like heating body to the pressure-conveying and conveying member. Is a current detector that detects a current value associated with energization of the PTC thermistor of the plate-shaped heating element during operation, and a current detected based on a current change detected by the current detector at the start of operation. It is judged that preheating has been completed under conditions that reached a predetermined value before the value has risen and peaked and then fell and reached the stable range, and the subsequent processing is selected as a processing area that can be laminated. And a drive system that controls a drive system that transmits a rotational driving force to the paired crimping and conveying member and variably drives a rotational speed of the paired crimping and conveying member by the driving system. Among the current changes detected by the current detector in the switching unit and the processing region selection unit, in the change region from the completion of preheating to the stable region after the elapse of a predetermined time, Case As it reduces the rotational speed of the crimping conveying member of said pair configuration than a laminating apparatus characterized by having a speed limiting unit for limiting the upper limit of the rotational speed of the crimping conveying member.

The invention according to claim 2 is the laminating apparatus according to claim 1, wherein when the current value detected by the current detector is located within a change range, the speed limiter is adapted to the pair as the speed approaches the stable range. The laminating apparatus is characterized in that the upper limit value of the rotational speed of the pressure-conveying and conveying member having the structure is increased stepwise.
According to a third aspect of the present invention, in the laminating apparatus according to the first or second aspect, the control device includes a thickness recognizing unit capable of recognizing a thickness of a laminate process target between the laminated film and the sheet, and the drive switching The laminate is switched based on the recognition result of the thickness recognition unit so that the rotational speed of the paired crimping conveyance member by the drive system is slower when the thickness information is thicker than when the thickness information is thin. Device.
According to a fourth aspect of the present invention, in the laminating apparatus according to any one of the first to third aspects, the speed limiter further includes a current value within the stable range among the current changes detected by the current detector. Under the condition of decreasing to a predetermined level, it is determined that the surface temperature of the crimping conveyance member in which the plate-like heating body is built is saturated, and the rotation speed of the paired crimping conveyance member is predetermined. It is a laminating apparatus characterized by disabling less than the lower limit.
According to a fifth aspect of the present invention, in the laminating apparatus according to any one of the first to fourth aspects, when the speed limiter limits the rotational speed of the paired crimping conveyance member, the operation mode in the limited range is A laminating apparatus comprising a display capable of displaying that use is impossible under selected conditions.

According to the first aspect of the present invention, the laminating temperature rise speed can be increased without using a temperature detector, and the laminating process immediately after the laminating temperature rise can be stably performed.
According to the invention which concerns on Claim 2, compared with the aspect which does not have this structure, the rotational speed control of the crimping | compression-bonding conveyance member of a pair structure can be implement | achieved easily.
According to the invention which concerns on Claim 3, the lamination process with respect to the lamination process object from which thickness differs can be effectively implemented by supplying the heat amount suitable for the lamination process object from which thickness differs appropriately.
According to the invention which concerns on Claim 4, compared with the aspect which does not have this structure, the situation where jamming of the thin lamination process target, for example at the time of a lamination process can be avoided effectively.
According to the fifth aspect of the present invention, it is easier to visually recognize that the operation is erroneous for the user when the operation mode in the limited range by the speed limiter is selected, compared to the aspect without this configuration. Can be recognized.

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. 3 is an explanatory diagram showing a control system of the laminating apparatus according to Embodiment 1. FIG. (A) shows an example of the operation panel used in Embodiment 1, (b) is explanatory drawing which shows the structural example of the control apparatus shown in FIG. (A) shows an example of the current detector used in Embodiment 1, (b) is explanatory drawing which shows the current-voltage characteristic of a current detector. (A) is explanatory drawing which shows typically an example of the support structure which can float the thermocompression-bonding conveyance roll, (b) is explanatory drawing which shows the operation principle typically. (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. FIG. 3 is an explanatory diagram showing each functional unit of a control system of the laminating apparatus according to the first embodiment. 3 is a timing chart illustrating an operation example of a control system of the laminating apparatus according to the first embodiment. 3 is a timing chart showing an operation mode of the laminating apparatus according to the first embodiment. 4 is a flowchart showing the contents of laminating process control of the laminating apparatus according to the first embodiment. (A) is explanatory drawing which shows the electric current change accompanying the time passage of the PTC thermistor which concerns on Embodiment 1, (b) is explanatory drawing which shows the surface temperature change accompanying the passage of time of the thermocompression conveyance roll concerning Embodiment 1. (C) is explanatory drawing which shows the speed restriction | limiting (equivalent to the restriction | limiting of a lamination process speed) with the time passage of the thermocompression-bonding conveyance roll which concerns on Embodiment 1. FIG. (A) is explanatory drawing which shows typically the operation example in the preheating of the lamination apparatus which concerns on Embodiment 1, (b) is explanatory drawing which shows typically the operation example after completion of preheating of the lamination apparatus, (c) ) Is an explanatory view showing a jam processing example of the laminating apparatus. (A) is a timing chart which shows the automatic stop process of the lamination apparatus which concerns on Embodiment 1, (b) is a timing chart which shows the abnormality detection process of the lamination apparatus which concerns on Embodiment 1. FIG. It is a flowchart which shows the self-holding circuit and stop sequence of the laminating apparatus which concern on Embodiment 1. FIG. 6 is an explanatory diagram showing a modified form of a control system of the laminating apparatus according to 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.

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 11a coated with a hot-melt adhesive and a sheet 11b are stacked and bonded together, and at least the laminating film 11a and the sheet 11b are stacked and transferred by thermocompression. And a control device 14 for controlling the thermocompression conveying device 10.
In this example, the thermocompression conveying device 10 is a pair of pressure bonding and conveying members 1 (for example, 1a and 1b) that are formed in a hollow roll shape and sandwich and convey the object 11 to be laminated between the laminate film 11a and the sheet 11b. ), A plate-shaped heating body 2 that is built in a crimping and transporting member 1 (1a and 1b in this example) formed in a hollow roll shape of the pair of crimping and transporting members 1 and includes a PTC thermistor, and the hollow roll Heat transfer that is disposed in contact with the sheet-like pressure-conveying member 1 (1a, 1b in this example) and that can hold the plate-like heating body 2 and transfer heat from the plate-like heating body 2 to the pressure-bonding conveying member 1. Holding frame 3.

  Further, the control device 14 includes a current detector 15 that detects a current value associated with energization of the PTC thermistor of the plate heater 2 during operation, and a current change detected by the current detector 15 at the start of operation. , The detected current value rises and reaches a predetermined value (corresponding to the preheating completion determination current Iy in the figure) before it reaches the stable region II after falling after a peak. A processing area selecting unit 16 that determines that preheating is completed under the conditions, and the subsequent processing area is selected as a processing area that can be laminated, and a driving system that transmits a rotational driving force to the paired crimping conveyance member 1 13, a drive switching unit 17 that variably switches the rotation speed of the paired crimping conveyance member 1 by the drive system 13, and a current change detected by the current detector 15 in the processing area selection unit 16. No In the change region I from the completion of preheating to the stable region II after a predetermined time has elapsed, the rotational speed of the paired crimping conveyance member 1 is suppressed to be lower than that in the stable region II. And a speed limiter 18 that limits the upper limit value of the rotational speed of the pressure-conveying and conveying member 1.

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 11b, 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. One having a pair of conveying members 12 for pulling and conveying a sheet 11b laminated with a laminating film 11a later can be mentioned. In addition, a guide member for guiding and conveying the laminate film 11a and the sheet 11b may be provided before and after the thermocompression conveying device 10 and the paired conveying member 12.

Further, the plate-like heating body 2 may be appropriately selected as long as it includes a plate-like PTC thermistor.
The plate-like heating element 2 may be configured to have a long plate-like 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 11b and the laminate film 11a. 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, a peripheral wall having a cylindrical housing space having a substantially rectangular cross section in which the plate-like heating body 2 is housed and facing at least the front and back surfaces of the plate-like heating body 2. A holding cylinder frame 5 whose portion is deformed to be elastically deformable, and protrudes outwardly from a part of the elastically deformable peripheral wall portion of the holding cylinder frame 5 so as to be elastically deformable. Examples include those having a heat transfer arm frame 6 in which the peripheral wall portion of the holding cylinder frame 5 is brought into close contact with the front and back surfaces of the plate-like heating body 2 while being elastically deformed and brought into contact.

Moreover, although the control apparatus 14 controls the thermocompression-bonding conveyance apparatus 10, it is the crimping | compression-bonding conveyance member 1 and the plate-shaped heating body 2 of a pair structure as a control object.
The current detector 15 may be appropriately selected as long as it detects the current value associated with the energization of the PTC thermistor. Of course, the current detector 15 directly detects the current value, for example, via a resistance value. It also includes those that indirectly detect current values.
Furthermore, the processing area selection unit 16 uses the fact that the current value falls through a rising peak at the start of operation in accordance with the characteristics of the PTC thermistor, so that the surface temperature of the crimping conveyance member 1 reaches a preheat completion state. A value corresponding to the timing at which the amount of heat is supplied may be selected in advance, the completion of preheating may be determined based on whether or not this value has been reached, and then the processing area may be selected.
Furthermore, the amount of heat applied to the laminate processing object 11 between the laminate film 11a and the sheet 11b is increased or decreased by switching the rotational speed of the paired crimping conveyance member 1 by the drive switching unit 17. Here, the rotation speed may be switched continuously or in stages.
The variable rotation speed of the drive system 13 is not only a mode of switching the rotation speed of the drive source itself, but also a mode of changing the combination of the drive transmission mechanisms (for example, changing the gear ratio, etc.) It is also possible to change both drive transmission mechanisms.
Further, as the speed limiter 18, among the current changes detected by the current detector 15, in the change region I from the completion of preheating to the stable region II, the rotational speed of the paired crimping conveyance member 1 is reduced. The upper limit value may be set lower than that in the stable region II. That is, in the stable region II, it is possible to supply a sufficient amount of heat to the laminate processing object 11 even if the rotational speed of the crimping conveyance member 1 is set to the maximum speed. Since the surface temperature of 1 is not sufficiently high, the upper limit value of the rotation speed of the crimping conveyance speed is limited to be lower than the stable region II, and the amount of heat to be supplied to the laminate processing object 11 immediately after the preheating is completed. Is ensured by slowing the rotational speed of the crimping conveying member 1.

Next, a typical aspect or a preferable aspect of the laminating apparatus according to the present embodiment will be described.
First, as a typical mode of the speed limiting unit 18, when the current value detected by the current detector 15 is located in the change region I, the paired crimping conveyance member 1 becomes closer to the stable region II. There is one that increases the upper limit value of the rotation speed stepwise.
Moreover, as a preferable aspect of the drive switching unit 17, for example, when the control device 14 has a thickness recognition unit (not shown) that can recognize the thickness of the laminate processing object 11 between the laminate film 11a and the sheet 11b. Based on the recognition result of the thickness recognition unit, there is a mode in which the rotational speed of the paired crimping conveyance member 1 by the drive system 13 is switched to be slower when the thickness information is thicker than when the thickness information is thin.
Here, the thickness recognition unit may be any unit that recognizes the thickness information of the laminate processing target 11. The user selects the laminate processing target 11 to be used, and recognizes the thickness information based on the selection signal. Alternatively, the thickness of the laminate processing object 11 may be directly detected by a thickness detector, and the thickness information may be recognized based on the detection result.
Further, when the thickness information of the laminate processing target 11 is thick, the drive switching unit 17 requires a larger amount of heat than the thin case, so the drive switching unit 17 switches the rotational speed of the paired crimping conveyance member 1 to be slow, and conversely In the case where the thickness is thin, the rotational speed of the paired crimping conveyance member 1 may be switched so as to increase.

Furthermore, as a preferable mode of the speed limiting unit 18, among the current changes detected by the current detector 15, under the condition that the current value further decreases to a predetermined level within the stable region II, A mode in which the surface temperature of the pressure-conveying and conveying member 1 in which the plate-like heating body 2 is built is determined to be in a saturated state, and less than a predetermined lower limit value among the rotational speeds of the paired pressure-bonding and conveying member 1 is disabled Is mentioned.
If the surface temperature of the pressure-conveying conveyance member 1 is high in a saturated state, there is a concern that an overheated state may occur when the laminate processing object 11 is laminated. At this time, for example, when the rotational speed of the crimping conveyance member 1 is operated at a low speed, the laminate processing target 11 is jammed when the thin laminate processing target 11 is nipped by the paired crimping conveyance member 1 in an overheated state. (Deformation may occur when the laminate processing object 11 is clogged). However, this aspect is preferable in that such jamming is effectively avoided.
Moreover, you may make it provide the indicator which can display the speed limit by the speed limit part 18. FIG.
For example, when the speed limiting unit 18 limits the rotational speed of the paired crimping and conveying member 1, an indicator that can display that the operation mode within the limited range is not usable under the selected condition. What is provided with 19 is mentioned.
In this aspect, when the user selects the operation mode, it is not usable when the operation mode is within the limited range by the speed limiting unit 18. To announce.

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 paired thermocompression-conveying rolls 30 are each formed in a hollow roll shape, and a pairing-compressing and conveying roll 31 that sandwiches and conveys a laminate processing target 100 between the laminate film 101 and the sheet 102, and the pressure-bonding and conveying roll 31. A heater assembly 40 incorporated therein and a heat transfer holding frame 50 that holds the heater assembly 40 and transmits heat from the heater assembly 40 to the pressure-conveying 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 plate-like PTC thermistors 41 (specifically 41 a to 41 e) arranged in the length direction as a plurality of (for example, five) heaters, Long plate-like electrodes 42 and 43 are arranged on the front and back surfaces of each PTC thermistor 41 via a conductive adhesive layer 44, and the whole is 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 arbitrarily set according to 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.

-Control system for laminating machine-
FIG. 11 is an explanatory diagram schematically showing a control system of the laminating apparatus according to the first embodiment.
In the figure, reference numeral 120 denotes a drive motor 70 for driving the laminating apparatus 20 and a control device for controlling energization to the heater assembly 40. The drive motor 70 is driven based on a control signal from the control apparatus 120, The driving force from the drive motor 70 is transmitted to the thermocompression conveying roll 30 through a drive transmission system 90 schematically shown. When the operation switch 85 is turned on, the voltage from the power supply 80 is applied to the PTC thermistor 41 as each heater of the heater assembly 40 through the above-described energization structure, and the PTC thermistor 41 is energized.
In this example, the operation switch 85 energizes each circuit of the control board 121 (see FIG. 12) in response to turning on an operation switch (not shown), and energizes the heater relay coil 85a accordingly. By energizing the heater relay coil 85a, the heater relay contact piece 85b is moved to the ON contact, and the energized state of the heater assembly 40 is maintained.
Since energization to each circuit of the control board 121 is held by the self-holding circuit, the ON state of the operation switch 85 is maintained.
Further, a current sensor 130 is provided in the energization circuit to the heater assembly 40, and the current flowing to the heater assembly 40 is detected, and the detection output of the current sensor 130 is taken into the control device 120.
Furthermore, in this example, as shown in FIGS. 3 and 11, the thermocompression conveying roll 30 is provided with a thickness sensor 140 for detecting the thickness of the laminate processing object 100 to be conveyed. The detection output of the sensor 140 is taken into the control device 120. The thickness sensor 140 outputs a signal corresponding to the thickness information when the laminate processing object 100 passes through the nip portion of the paired thermocompression-conveying roll 30 and grasps the output timing of the thickness information. By doing so, the passage information (position information) of the laminate processing object 100 is also detected.
In addition, as shown in FIG. 3, a discharge sensor 145 is provided on the downstream side of the sheet conveyance path from the conveyance roll 22 in the sheet conveyance direction, and detects that the laminate processing target 100 passes. This detection output is taken into the control device 120.
Further, an operation panel (not shown) is connected to the control device 120, and a display device 160 for displaying various information is appropriately provided on the operation panel.

-Operation panel-
FIG. 12A shows a configuration example of an operation panel used in the present embodiment.
In the same figure, the operation panel 150 has an operation switch 152 for turning on / off the operation of the laminating apparatus 20, a speed change switch 153 for switching the rotation speed of the drive motor 70, and the drive motor 70 manually reversed on the operation plate 151. And a reverse switch 154 to be operated. The display 160 includes an operation lamp 161 that displays whether or not the laminating apparatus 20 is in an operating state, and a READY lamp 162 that displays whether preheating is completed after the laminating apparatus 20 turns on the operation switch 152. A speed indicator 163 composed of, for example, seven display segments for displaying a plurality of speeds (for example, five levels) according to switching by the speed changeover switch 153 is used.

-Configuration example of control device-
FIG. 12B shows a configuration example of the control device 120 used in the embodiment.
In the figure, the control device 120 includes a power switch 155 for turning on / off the power supply 80, a power transformer 156, an operation switch 152 for turning on / off to start / stop operation, and the speed of the drive motor 70, for example, 500 mm / min. ˜1,500 mm / min. A control board into which each input signal from a motor rotation detector 157 for detecting the operating state of the drive motor 70 is detected. The control board 121 includes a current fuse 122, a self-holding relay 123, an operation switch 85 including a heater relay, a current sensor (abbreviation of CT: Current Transformer) 130, a CPU 124, and a motor drive circuit 125. The control signal from the control board 121 is sent to the temperature fuse 165, the PTC thermistor 41, the display 160, the drive motor 70, and the like.

-Current sensor-
In the present embodiment, for example, as shown in FIG. 13A, the current sensor 130 has a magnetic core 131 made of, for example, high permeability ferrite. winding the next winding 133, the current flowing through the primary winding 132 with connecting power source 80 to the primary winding 132 and I _1, whereas, the predetermined across the secondary winding 133 It has a configuration for taking out a voltage V ₂ by interposing the resistance R (e.g., 5 [Omega) of obtained values.
As shown in FIG. 13B, the current sensor 130 has a characteristic that is approximately proportional to the current I ₁ and the voltage V _2. For example, the current sensor 130 is monitored by monitoring the voltage V _2. and detects the current I _1.

-Thickness sensor-
In the present embodiment, the thickness sensor 140 supports one thermocompression-conveying roll 30a of the pair of thermocompression-conveying rolls 30 in a floatable manner, so that laminates having different thicknesses between the thermocompression-conveying rolls 30 of the pairing are provided. When the processing object 100 (laminate film 101 + sheet 102) passes, the floatable thermocompression conveying roll 30a floats according to the thickness of the laminating process object 100, and corresponds to, for example, the floating amount of the thermocompression conveying roll 30a. In this case, a material that deforms and deforms and detects thickness information of the laminate processing object 100 based on the amount of strain deformation is used.
Here, as a structure for supporting the thermocompression conveying roll 30a in a floating manner, for example, as shown in FIGS. 14A and 14B, insulating support shafts 71 are supported at both ends of the thermocompression conveying roll 30a. The bearing 72 is urged and supported by the urging spring 172 so as to float, and the relative positional relationship between the insulating support shaft 71 and the bearing 72 is determined by the urging force of the urging spring 78 that urges the conductive brush 77. A structure is adopted so as to hold it.
―Discharge sensor―
In the present embodiment, the discharge sensor 145 may have any function as long as it has a function of detecting that the front end of the laminate processing target 100 passes in the transport direction, and may be a machine such as an optical sensor such as a photocoupler or a limit switch. Sensor is adopted.

-Basic operation of laminating machine-
Next, the basic operation of the laminating apparatus according to this embodiment will be described.
First, before describing the basic operation of the laminating apparatus according to the present embodiment, the basic operation of the laminating apparatus according to the comparative embodiment will be described.
FIG. 15A 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 this embodiment, as shown in FIGS. 10 and 15B, 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. This is applied to the heater assembly 40 via the brush 77 and the conductive pipe 74.
Then, a current flows through each PTC thermistor 41 to generate heat, and heat from the heater assembly 40 mainly includes the peripheral wall portion 52a of the holding cylinder frame 51 of the heat transfer holding frame 50 made of a metal having a good heat transfer property, and heat transfer arms. 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 heater assembly 40 using the PTC thermistor 41 is fast, and when the temperature reaches the Curie temperature Tc, the resistance value immediately increases, so that current does not flow easily and heat generation of the heater 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 this embodiment, the self-temperature control function of the heater 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.
Furthermore, since the heater assembly 40 does not rise excessively, it is not necessary to consider the situation where the thermocompression carrying roll 30 abnormally rises in temperature, and it is not necessary to consider an abnormal measure 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.

-Various control processes by laminating machine-
Next, various control processes performed by the laminating apparatus 20 according to the present embodiment will be described.
FIG. 16 is a block diagram schematically showing various control processes by the laminating apparatus 20 according to the present embodiment.
(1) In the initial setting process 16 of the current and temperature, reference numeral 180 is to set the preheating completion determination current I _th, which will be described later, a current-temperature setting device for setting the set temperature of the PTC thermistor 41, for example, an operation panel By using 150 under specific conditions, data is written in a memory (not shown) of the control board 121.

(2) Preheating Completion Determination Processing As shown in FIGS. 16 and 17, when the operation switch 152 of the operation panel 150 is pressed down and turned on with the power switch 155 turned on, the operation switch 85 is turned on and the PTC of the heater assembly 40 is turned on. The thermistor 41 is energized.
At this time, the PTC thermistor 41 rises from its electrical characteristics and rises after the peak Ip and then falls to a predetermined threshold (preheating completion determination current) I _th (for example, 1.5 A). And then reaches a substantially constant value.
Along with such a change in current, the PTC thermistor 41 heats the thermocompression transport roll 30 (30a or 30b), so the surface temperature Ts of the thermocompression transport roll 30 gradually increases, and the preheating completion determination current at the time that led to the I _th reaches the lower limit value _{T 1} of the target control temperature of the thermocompression bonding transport roll 30 (e.g., 110 ° C.), then the upper limit value _{T 2} of the target control temperature of the thermocompression bonding transport roll 30 (e.g., 120 ° C.) To reach.
The upper limit value T ₂ of the target control temperature of the thermocompression bonding transport roll 30 is set depending on the set temperature of the PTC thermistor 41.
In particular, in this example, the READY lamp 162 is extinguished before the PTC thermistor 41 is energized, but the current value I flowing through the PTC thermistor 41 rises and changes after the PTC thermistor 41 is energized. during and are, as well, while and does not lead to completion of preheating determination current I _th in while changing fall is, READY lamp 162 is flashing. Then, PTC when the current value I flowing through the thermistor 41 reaches changed below the preheating complete determination current _{I th} by falling, keep the READY lamp 162 is turned on.
The operation lamp 161 is turned on when the operation switch 152 is turned on.

(3) As shown in the motor rotation control process 16 and 17 by the thickness sensor, the energization to the PTC thermistor 41 is started and the current value I reaches below the preheating complete determination current I _th, thermocompression transport the surface temperature Ts of the roll 30 reaches the lower limit value T ₁ of the target control temperature, leading to a state which can be subjected to laminate treatment as the laminator 20.
In this state, assuming that the thickness d of the laminate processing object 100 is d ₁ , d ₂ , d ₃ (d ₁ <d ₂ <d ₃ ), the detection output of the thickness sensor 140 is a speed setting mounted on the control board 121. A control signal is sent to the drive motor 70 via the device 141.
First, when the thickness d of the lamination object 100 is assumed when the d _1, as shown in FIG. 17, controls the drive time t of the drive motor 70 as drive time t is shorter t ₁ of the drive motor 70 and, and, to control the rotational speed m of the drive motor 70 so that the rotational speed m of the drive motor 70 to a higher value m _1.
In this case, since the laminating target 100 is thin, the laminating process 100 is carried out satisfactorily even if the heat capacity of the laminating target 100 is small, the transport speed of the thermocompression transport roll 30 is increased, and the driving time t is shortened.
Next, when the thickness d of the lamination object 100 is assumed when the d _2, as shown in FIG. 17, the drive motor 70 as drive time t is longer t ₂ as compared to t ₁ of the drive motor 70 And the rotational speed m of the driving motor 70 is controlled so that the rotational speed m of the driving motor 70 is a value m ₂ lower than m ₁ .
In this case, since the laminating process object 100 is thicker than the d _1, the heat capacity of the laminate processed 100 is increased as compared with the case of d _1, thermocompression bonding transport roll 30 and the driving time of the conveying speed Te late t By extending the length, the laminating process is carried out satisfactorily.
Further, the thickness d of the lamination object 100 is assumed when the d _3, as shown in FIG. 17, the driving motor 70 so that the driving time t becomes more long t ₃ as compared to t ₂ of the drive motor 70 And the rotational speed m of the driving motor 70 is controlled so that the rotational speed m of the driving motor 70 becomes a value m ₃ lower than m ₂ .
In this case, since the thickness of the laminate processing target 100 is further thicker than that of d ₂ , the heat capacity of the laminate processing target 100 is further increased as compared with the case of d ₃ , and the transport speed of the thermocompression transport roll 30 is set to d ₂ . The laminating process can be performed satisfactorily by further delaying compared with the case and further extending the driving time t.

-Operation mode-
FIG. 18 is a timing chart showing the operation state of each part of the laminating apparatus 20 in the operation mode.
Now, when the operation switch 152 is turned on, each circuit of the control board 121 is energized, so that the operation switch 85 is turned on when the heater relay is excited. In this state, the self-holding circuit 170 (see FIG. 16) keeps energization of each circuit of the control board 121, so that the operation switch 85 is kept on, and the PTC thermistor 41 as the heater of the heater assembly 40 is held. Continue to be energized.
Further, as described above, when the operation switch 152 is turned on, the operation lamp 161 continues to light both during preheating and after completion of preheating. On the other hand, the READY lamp 162 blinks during preheating, and the READY lamp 162 is turned on when preheating is completed. Therefore, whether or not the laminating apparatus 20 is preheating is determined by looking at the state of the READY lamp 162.
Further, in this example, the drive motor 70 rotates in the reverse direction and rotates at a low speed during preheating. Therefore, even if the laminating object 100 is inserted into the laminating apparatus 20 during preheating, the laminating object 100 is conveyed by thermocompression bonding. It is not accidentally drawn into the roll 30.
Furthermore, after the preheating is completed, the drive motor 70 rotates forward at the set speed set by the speed indicator 163, so that the laminating process is performed quickly.
Furthermore, in the present embodiment, when a stop operation is performed in which the operation switch 152 is pushed down again, a stop sequence is performed and the operation of the laminating apparatus 20 is stopped. At this time, energization to the PTC thermistor 41 as a heater is released along with the stop operation, but in order to completely stop the laminating apparatus 20, a predetermined time (for example, 1 to 2 minutes) after the stop operation. The thermocompression carrying roll 30 or the like is idled to perform a cooling operation, and then the self-holding circuit is released and the stop sequence ends.

―Lamination processing control in operation mode―
Next, FIG. 19 shows a flowchart relating to laminating process control in the operation mode.
<Processing area selection process>
In the figure, when the operation switch 152 is turned on, the control device 120 starts preheating in the heater assembly 40 and, as shown in FIG. Perform completion determination processing. For example, as shown in FIG. 20A, assuming that the time when the current value of the PTC thermistor is equal to or less than the preheating completion determination current Ith is ty, the region after ty is selected as a processing region in which the laminating process can be performed.
<Speed setting process for the object to be laminated>
As shown in FIG. 19, this process is performed after the thermocompression carrying roll 30 is driven to rotate forward when the preheating completion determination process is completed.
Specifically, first, the speed of the thermocompression conveying roll 30 is set based on the thickness information from the thickness sensor 140 for the laminate processing object 100.
At this time, as shown in FIG. 20A, the processing area after completion of preheating is from the current value of the PTC thermistor until the steady-state current Ia (time ta) is stabilized from the preheating completion determination current Ith (time ty). It is divided into a change area I and a subsequent stable area II.
Now, in the change region I, the surface temperature of the thermocompression transporting roll 30 changes from a temperature Ty (for example, 145 ° C.) corresponding to the preheating completion determination current Ith to a steady temperature Ta (for example, 165 ° C.) corresponding to the steady current Ia. However, the temperature is lower than the steady temperature Ta.
In such a state, the speed v (corresponding to the laminating speed) of the thermocompression conveying roll 30 can be switched to a plurality of stages in FIG. 20C (in this example, 5 stages: v _{L1 to} v _L5 ). When the thermocompression-conveying roll 30 is operated at a high speed in the change area I, there is a possibility that the amount of heat to the lamination target 100 is insufficient.

Therefore, in the present embodiment, if the intermediate value of the current value of the PTC thermistor in the change region I is Ic (Ith <Ic <Ia), the surface temperature of the thermocompression conveying roll 30 is within a range that is less than Ith and greater than Ic. Since T is Ty ≦ T <Tc (for example, 155 ° C.), the speeds v _L4 and v _L5 are limited, and the surface temperature T of the thermocompression conveying roll 30 is Tc ≦ T <Ta in a range greater than Ic and greater than Ia. _Therefore , when the speed v _L5 is limited and the stable range II is reached, the speed limit described above is canceled and all the speeds v can be set.
As described above, in the change region I, since there is the speed limit described above, if it is attempted to perform the laminating process at the speed v _L4 in a range less than Ith and greater than Ic (Ty ≦ T <Tc), the speed limit is It is corrected to v _L3 which is the maximum speed at a level that is not present. For this reason, immediately after completion of preheating, when the surface temperature T of the thermocompression-bonding transport roll 30 is not yet sufficiently high, a process of ensuring a sufficient amount of heat to the object 100 to be laminated by setting the speed slower is performed. Done.
If the setting is made so that the laminating process can be performed after waiting until the stable range II of time ta is reached, the speed limit described above is unnecessary, but the laminating process cannot be performed until time ta. In this respect, the present embodiment is preferable in that the preheating completion time can be shortened since the laminating process can be performed after the time ty (ty <ta).
In addition, when a speed switching instruction is made by operating the speed switching switch 153 (see FIG. 12), the speed of the thermocompression-conveying transport roll 30 is switched within a range where the speed is not limited.

Further, when a relatively long time tb (for example, 30 minutes) has elapsed since reaching the stable region II, the thermocompression conveying roll 30 may become a saturation temperature Tb (for example, 167 ° C.) higher than the steady temperature Ta (for example, 165 ° C.). There is. At this time, the current value of the PCT thermistor is Ib. In such a situation, when the laminating target 100 is thin, if the thermocompression conveying roll 30 is rotated at a low speed (for example, v _L1 ), the overheated thermocompression conveying roll 30 contacts the laminating target 100 at a low speed. Therefore, there is a concern that the laminate processing target 100 may be jammed and caught in the thermocompression conveying roll 30.
Therefore, in the present embodiment, as shown in FIG. 20C, after the relatively long time tb has elapsed, the speed v _L1 is limited and can be set in the range of speeds v _{L2 to} v _L5. Is done.

<Discharge confirmation processing for the target of laminating>
Thereafter, when the speed setting of the thermocompression transport roll 30 is performed, the thermocompression transport roll 30 performs a laminating process on the laminating target 100.
At this time, the control device 120 counts a timer from the detection time of the thickness sensor 140, and when the laminate processing target 100 is conveyed at a predetermined time Δt (set speed), the thickness of the laminate processing target 100 is Whether or not the discharge sensor 145 is turned on is checked on the condition that a value obtained by adding a certain margin to the time from the detection point 140 to the detection point of the discharge sensor 145 has elapsed.
At this time, if the discharge sensor 145 is turned on, as shown in FIG. 21B, it means that the laminate processing object 100 has reached the position where the discharge sensor 145 is disposed. The transport roll 22 continues to rotate forward as it is, and the laminating object 100 is discharged from the laminating apparatus 20.
On the other hand, when the output of the discharge sensor 145 is checked at the timing described above, under the condition that the output of the discharge sensor 145 remains off, as shown in FIG. This means that the position 145 is not reached. This is presumed that the laminating object 100 remains in the laminating apparatus 20 more than necessary due to some abnormal factor (for example, jamming, etc.). As shown in FIG. 21 (c), a process (jam process) for forcibly discharging the laminate processing object 100 from the entrance side of the sheet conveyance path is performed by driving the thermocompression conveyance roll 30 and the conveyance roll 22 in the reverse direction. Is called.
For example, the READY lamp 162 may be blinked during the jam processing.

-Automatic stop processing-
In the automatic stop process, as shown in FIG. 22A, the laminating apparatus 20 is automatically stopped when the PTC thermistor 41 is energized and not used for a long time.
In this example, the criterion for non-use for a long time is, for example, a predetermined time t when the current value I accompanying energization of the PTC thermistor 41 is equal to or less than a predetermined threshold I _th ′ (for example, 0.5 A). Based on the condition that more than _w (for example, 10 minutes) has passed.
In this case, when the surface is not used for a long time, the surface temperature Ts of the thermocompression conveying roll 30 may reach a considerably high temperature _Tw (for example, 150 ° C.). When not in use, the self-holding circuit 170 for each circuit on the control board 121 is released to end the stop sequence.
-Anomaly detection processing-
In this abnormality detection process, as shown in FIG. 22B, for example, an abnormal situation where the wiring to the PTC thermistor 41 is disconnected is detected, and the laminating apparatus 20 is automatically stopped when the abnormal situation is detected.
In this example, the criterion for detecting an abnormal situation is that, for example, the wiring to the PTC thermistor 41 is disconnected and the current value I reaches a predetermined threshold value I _th ″ (for example, 0.3 A) or less. Based.
When an abnormal situation is detected in this way, the drive motor 70 is stopped, the energization of the PTC thermistor 41 is stopped, and an error is displayed on the display 160.
Here, for error display, for example, the operation lamp 161 and the READY lamp 162 are blinked, and E corresponding to the error character is displayed on the speed display 163. In this state, the self-holding circuit 170 is immediately released by depressing the operation switch 152, and the stop sequence ends. Then, the error is cleared by depressing the operation switch 152 again, and the re-operation of the laminating apparatus 20 is started.

-Self-holding circuit and stop sequence-
FIG. 23 is a timing chart showing the operating state of each part associated with the formation of the self-holding circuit.
In the figure, when the operation switch 152 is turned on, the self-holding relay is turned on and the self-holding relay power source is turned on to form a self-holding circuit.
Further, when the operation switch 152 is turned on during operation, a stop mode is entered, the power supply to the PTC thermistor 41 as a heater is turned off, the operation lamp 161 is blinked, and a predetermined time t _e (for example, 1 minute) ) Later, by turning off the self-holding relay, the self-holding by the self-holding relay power supply is turned off and the self-holding circuit is released.
Here, when the self-holding relay is off, it is necessary to lower the self-holding relay power supply below the relay operating voltage while the control board power supply is in the operating region.
Further, it is preferable to design the control board power supply so that the reset circuit when the operation switch 152 is on operates normally when the self-holding relay power supply is turned off.
In the present embodiment, a method using a self-holding circuit is adopted, but it goes without saying that the control board power supply may be turned on / off in conjunction with the on / off of the operation switch 152 without using this. is there.

◎ Deformation 1
In the present embodiment, a mode of performing motor rotation control by the thickness sensor 140 is disclosed. However, the present invention is not limited to this. For example, as shown in FIG. The laminate processing target selection switch 190 appropriately selects a plurality of laminate processing targets 100 having different thicknesses and inputs them to the control device 120 so that the motor rotation control is executed for each of the laminate processing targets 100 having different thicknesses. Also good.

Embodiment 2
FIG. 25 shows an outline of Embodiment 2 of the 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. 26 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 crimping conveyance roll 91 (91a, 91b) substantially functions as the thermocompression bonding conveyance roll 30, and the laminated sheet 102 that has passed through the upstream side crimping conveyance roll 91 (91a, 91b) is After being conveyed while being sandwiched between the belt members 93 (93a, 93b), the sheet is discharged through a downstream pressure-bonding conveying roll 92 (92a, 92b).
At this time, the laminating process by the upstream side pressurizing and conveying roll 91 (91a, 91b) is suitably performed in substantially the same manner as in the first embodiment.

  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 ... Lamination processing object 11a ... laminate film, 11b ... sheet, 12 ... conveying member, 13 ... drive system, 14 ... control device, 15 ... current detector, 16 ... processing area selection unit, 17 ... drive switching unit, 18 ... speed limiter, 19 ... Display, I ... Current value, t ... Time, Iy ... Preheating completion judgment current, I ... Change region, II ... Stable region

Claims (5)

A laminating apparatus for laminating and laminating a laminate film and a sheet coated with a hot-melt adhesive,
A thermocompression conveying device that performs thermocompression bonding while conveying at least the laminate film and the sheet;
A controller for controlling the thermocompression conveying device,
The thermocompression conveying device is
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;
A plate-like heating body including a PTC thermistor built in a crimping conveyance member formed in a hollow roll shape among the pair of crimping conveyance members;
A heat transfer holding frame that is disposed in contact with the hollow roll-shaped crimping conveyance member and is capable of holding the plate-like heating body and transmitting heat from the plate-like heating body to the crimping conveyance member;
The controller is
A current detector that detects a current value associated with energization of the PTC thermistor of the plate-like heating element during operation;
Based on the current change detected by the current detector at the start of operation, the detected current value changes to a predetermined value before rising to a stable region after falling and changing after a peak. A processing area selection unit that determines that preheating is completed under the conditions reached, and selects a processing area that can be laminated after that,
A drive switching unit that controls a driving system that transmits a rotatable driving force to the paired crimping conveyance member, and variably switches a rotation speed of the paired crimping conveyance member by the driving system;
Among the current changes detected by the current detector in the processing area selection unit, in the change area from the completion of preheating to the stable area after elapse of a predetermined time, compared to the case of the stable area A speed limiter for limiting the upper limit of the rotational speed of the crimping conveyance member so as to keep the rotational speed of the crimping conveyance member of the pair configuration low;
A laminating apparatus comprising: The laminating apparatus according to claim 1, wherein
When the current value detected by the current detector is within the change region, the speed limiting unit increases the upper limit value of the rotational speed of the paired crimping conveyance member stepwise as the current value approaches the stable region. A laminating apparatus characterized by being a thing. The laminating apparatus according to claim 1 or 2,
The control device has a thickness recognition unit capable of recognizing the thickness of a laminate process target between the laminate film and the sheet,
The drive switching unit switches based on the recognition result of the thickness recognition unit so that the rotation speed of the paired crimping conveyance member by the drive system is slower when the thickness information is thicker than when the thickness information is thin. Laminating equipment. The laminating apparatus according to any one of claims 1 to 3,
The speed limiter includes the plate-like heating element under a condition in which the current value of the current change detected by the current detector is further reduced to a predetermined level within the stable region. A laminating apparatus characterized in that a surface temperature of a pressure-conveying and conveying member is determined to be in a saturated state, and less than a predetermined lower limit value among the rotational speeds of the paired crimping and conveying member is disabled. The laminating apparatus according to any one of claims 1 to 4,
When the speed limiter limits the rotational speed of the paired crimping conveyance member, the display device is capable of displaying that the use is not possible under the condition that the operation mode in the limit range is selected. A laminating apparatus characterized by comprising:

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