JPH0985823A - Stamper attaching apparatus in emboss-processing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing jig attaching the rotary direction start end part and final end of a stamper and permitting the relative movement of the stamper in the peripheral direction of the roller of the stamper and absorbing the elongation of the stamper when the elongation of the stamper is generated to prevent the levitation of the stamper at the final end part of the roller. SOLUTION: A reinforcing jig 4 mounting a stamper 2 on a heat roller 6 is constituted of an auxiliary main body 14 and a movable element 18. The end surface 1402 in front of the rotary direction of the auxiliary jig main body 14 is formed into a flat surface along the radius direction of the heat roller 6 and the rotary direction start end part 202 of the stamper 2 is attached to the end surface 1402 in front of the rotary direction by a screw 12. The rotary direction rear end part 204 of the stamper 2 is fixed to the end surface 1804 of the movable body 18 by a screw 16. The movable body 18 to which the rotary direction end part 204 of the stamper 2 is fixed is relatively moved in a load acting direction along the outer peripheral surface 6A of the heat roller 6, that is, in the direction separated from the end surface 1404 of the auxiliary jig main body 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embossing machine configured to transfer a periodic pattern onto the surface of a resin sheet inserted between a pair of rollers, and at least one of the rollers is provided with the pattern. The present invention relates to a fixing device for removably attaching a stamper that has been applied.

[0002]

2. Description of the Related Art A conventional embossing machine is shown in FIG.
As shown in FIG. 3, a sheet-shaped stamper 2 having a predetermined pattern is attached to the heat roller 6 via an auxiliary jig 4, and the heat roller 6 is arranged in parallel with the heat roller 6. And a pressure roller (not shown) sandwiching the resin sheet therebetween. Then, the resin sheet is heated by the heat roller 6 and fed in a certain direction while being pressed by the pressure roller, whereby the pattern formed on the stamper 2 is transferred to the resin sheet, and a predetermined pattern is applied to the resin sheet. The pattern is formed periodically.

Conventionally, the stamper 2 is replaced with a heat roller 6
In the case of fixing to, the auxiliary jig 4 is divided into a plurality of pieces in the circumferential direction of the heat roller 6 (in the illustrated example, divided into two),
As shown in FIGS. 14 and 15, after the main body 2A of the stamper 2 is brought into close contact with the outer peripheral surface 4A of the auxiliary jig 4 without any gap, the start end portion 202 and the end portion 204 are bent inward, End surfaces 402, 404 of the auxiliary jig 4
The surface of the auxiliary jig 4 is brought into surface contact with each other, and the start end portion 202 and the end portion 204 are fixed to the end surfaces 402 and 404 of the auxiliary jig 4 by the screws 8.

[0004]

By the way, in such a conventional embossing machine, the stamper 2 mounted on the heat roller 6 expands due to the processing heat and the pressing force during the embossing, and this expansion occurs. However, as the heat roller 6 rotates, the heat roller 6 is accumulated behind the heat roller 6. Therefore, the end portion 2 of the stamper 2
In the vicinity of 04, a phenomenon occurs in which the stamper 2 floats up from the auxiliary jig 4, as indicated by reference numeral 10 in FIG. 16, and a periodic transfer defect occurs at the end portion in the rotation direction of the heat roller 6. Such a problem occurs.

The present invention has been made in view of the above-mentioned conventional problems. Even when the stamper attached to the roller is stretched during embossing, the stretch is automatically absorbed, The problem to be solved is to prevent the occurrence of the lifting phenomenon of the stamper at the roller end portion.

[0006]

In order to solve the above-mentioned problems, the present invention provides a pair of rollers and a resin sheet which is attached to the surface of at least one of the rollers and is inserted between these rollers. In a embossing machine provided with a sheet-shaped stamper for forming a general pattern, a roller to which the stamper is attached,
An auxiliary jig for attaching the stamper is attached, and the auxiliary jig is attached with a first attaching means for attaching a rotation-direction start end portion of the stamper and a rotation-direction end portion of the stamper, and Second mounting means for permitting relative movement of the rollers in the circumferential direction is provided.

Further, according to the present invention, the auxiliary jig includes a movable body provided so as to be relatively movable along the circumferential direction of the roller with respect to the auxiliary jig main body and the rotational direction end portion of the auxiliary jig main body. In addition, the second attaching means is configured to include the movable body. Further, the present invention is characterized in that an elastic member is provided between the auxiliary jig main body and the movable body so as to urge the both in a direction of separating them along the circumferential direction of the roller. Further, the present invention is characterized in that the elastic member is a coil spring.

Further, the present invention is characterized in that the second attaching means is constituted by a clamp mechanism which holds the end portion of the stamper and permits only the rearward movement of the stamper in the rotational direction. And Further, the present invention is characterized in that the clamp mechanism is composed of a sandwiching plate fixed to the roller, and a pressure roller for grasping an end portion of the stamper between the sandwiching plate. . Further, the present invention is characterized in that a one-way clutch for restricting a rotation direction of the pressure roller is provided.

Further, according to the present invention, a pair of rollers and a sheet-like member for being attached to the surfaces of at least one of the rollers to form a periodic pattern on the surface of a resin sheet inserted between these rollers. In an embossing machine equipped with a stamper, an auxiliary jig for attaching the stamper is attached to a roller to which the stamper is attached, and the auxiliary jig includes an auxiliary jig body and a rotation of the auxiliary jig body. It is characterized in that it is composed of divided blocks arranged at at least one end in the direction, and the thermal expansion coefficient of the divided blocks is set to be larger than the thermal expansion coefficient of the auxiliary jig main body. Further, the present invention is characterized in that the coefficient of thermal expansion of the auxiliary jig is set to be substantially the same as that of the roller. Further, the present invention is characterized in that the divided blocks are provided at both ends of the auxiliary jig body in the rotation direction. Further, the present invention is characterized in that the roller to which the stamper is attached is a heat roller.

According to the present invention, when the working heat and the pressing force at the time of embossing act on the stamper and the stamper expands in the rotational direction, the second mounting means causes
The rotational end portion of the stamper is moved relative to the auxiliary jig toward the rear in the rotational direction to absorb the extension. Further, in the present invention, when the working heat and the pressing force at the time of embossing act on the stamper and the stamper expands in the rotational direction, the divided blocks are thermally expanded to absorb the expansion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view of the starting end portion of the stamper attached, FIG. 2 is a sectional view of the end portion of the stamper attached, and FIGS. 3 and 4 are sectional views of the auxiliary jig body and the movable body in a connected state. 5 shows a cross-sectional view of a state in which the movable body has moved. In the following description, the same parts as those of the related art are designated by the same reference numerals to simplify the description. In this embodiment, only the heat roller 6 has the stamper 2
In the example in which the auxiliary jig 4 for mounting the stamper 2 on the heat roller 6 is divided into two in the circumferential direction,
These auxiliary jigs 4 are integrally attached to the heat roller 6 by an appropriate means so as to surround the outer peripheral surface 6A, and the stamper 2 is attached to each of these auxiliary jigs 4. Each of these auxiliary jigs 4 is composed of an auxiliary jig body 14 and a movable body 18.

The auxiliary jig body 14 has an inner peripheral surface 14A and an outer peripheral surface 14 extending along the outer peripheral surface 6A of the heat roller 6.
B has a front end face 1402 in the rotation direction (that is, the rotation direction of the heat roller 6) formed in a plane along the radial direction of the heat roller 6, and has a rear end face 14 in the rotation direction.
04 is formed by a surface inclined so that the edge on the heat roller 6 side is in the front in the rotation direction. The stamper 2
The rotation direction start end portion 202 of the
It is attached to 402 with screws 12.

The movable body 18 is disposed so as to face an end surface 1404 of the auxiliary jig body 14 at the rear side in the rotation direction.
Like the auxiliary jig body 14, the movable body 18 has an inner peripheral surface 18A and an outer peripheral surface 18B extending along the outer peripheral surface 6A of the heat roller 6, and the movable body 18 is an end surface of the auxiliary jig body 14. The end surface 1802 facing the end surface 1404 is formed as an inclined surface that can be engaged with the end surface 1404, that is, an inclined surface that is fitted to the end surface 1404 at the same inclination angle as the end surface 1404.
In addition, the end surface 1 located rearward in the rotation direction of the heat roller 6
804 is a flat surface along the radial direction of the heat roller 6 with the end surface 1802 aligned with the end surface 1404, or with the inner peripheral surface 18A of the movable body 18 aligned with the outer peripheral surface 6A of the heat roller 6. Has been formed.

As shown in FIGS. 3 and 4, the movable body 18 and the auxiliary jig body 14 are connected to each other by the bolts 20 and the elastic members 22 at a plurality of positions spaced in the length direction of the heat roller 6. Is done through. That is, a concave portion 1810 for accommodating the head portion 20A of the bolt 20 is formed in the end surface 1804 of the movable body 18, and the head portion 20A is accommodated in the concave portion 1810 and passes through the screw insertion hole of the movable body 18 to allow the bolt 20 to move. The screw portion is attached to the female screw of the reinforcing member main body 14. A gap g is secured between the lower surface of the head portion 20A and the bottom surface of the recess 1810. In addition, the auxiliary jig body 1
4, the end face 1404 of No. 4 and the end face 1802 of the movable body 18 are formed with recesses 21A and 21B at positions where they coincide with each other, and the elastic member 22 formed of a coil spring is housed over both recesses 21A and 21B. 22
By the direction in which the movable body 18 is separated from the auxiliary jig body 14,
That is, the heat roller 6 is biased rearward in the rotation direction.

The rear end portion 204 of the stamper 2 in the rotational direction
Are fixed to the end surface 1804 by screws 16 as shown in FIG. Therefore, in this embodiment, the movable body 18 is movable rearward with respect to the auxiliary jig body 14 in the rotation direction of the heat roller 6, and the auxiliary jig body 14 and the movable body 1 are movable.
8 is connected by the stamper 2 and the bolt 20. In this embodiment, the auxiliary jig body 14 and the screw 12 constitute the first attaching means, and the movable body 1
The second mounting means is composed of the screw 8, the screw 16, the bolt 20, and the elastic member 22.

Next, the operation will be described. When the embossing process is started, the heat roller 6 is rotated as shown by an arrow in the drawing, and the stamper 2 is mounted on the stamper 2 along the circumferential direction of the heat roller 6 by the processing heat and the pressing force for the process. A load is applied in the extending direction, that is, in the direction opposite to the rotating direction of the heat roller 6. When the stamper 2 is stretched by this load, as shown in FIG. 5, the movable body 18 to which the rotational direction end portion 204 of the stamper 2 is fixed is the outer peripheral surface 6A of the heat roller 6.
Along which the load acts, that is, in the direction away from the end surface 1404 of the auxiliary jig body 14. At this time, since the elastic member 22 is provided, this movement is performed smoothly.

As a result, the expansion of the stamper 2 is absorbed, and the stamper 2 is prevented from rising in the vicinity of the terminal end in the rotational direction. As a result, periodical transfer failure at the rotational direction end portion of the stamper 2 during embossing is prevented. In the embodiment, a gap g is formed between the lower surface of the head portion 20A of the bolt 20 and the bottom surface of the recess 1810.
Since the above is provided, the expansion of the stamper 2 is absorbed by an amount corresponding to the gap g.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 is a cross-sectional view of a state where the starter of the stamper is attached, FIG. 7 is a cross-sectional view of a state where the end of the stamper is attached and the clamp mechanism, and FIG. 10
Shows a sectional view of a state in which the auxiliary jig body and the movable body are connected.
In the present embodiment, the second mounting means provided on the auxiliary jig 4 is modified, and the second mounting means grips the terminal end portion 204 of the stamper 2 and rotates the stamper 2. The clamp mechanism 24 allows only the backward movement in the direction.

More specifically, as shown in FIG. 7, the auxiliary jig 4 is divided into two in the circumferential direction of the heat roller 6,
The end of the other auxiliary jig 4 in the rotational direction faces the end of the other auxiliary jig 4 in the rotational direction, and the clamp mechanism 24 is provided over both ends. The clamp mechanism 24 includes a holding plate 26 arranged at an end portion of the other auxiliary jig 4 on the front side in the rotation direction, and a pressure roller for holding the end portion 204 of the stamper 2 between the holding plate 26. 28 and a one-way clutch 30 that regulates the rotating direction of the pressure roller 28.

As shown in FIG. 6 and FIG. 7, the holding plate 26 is formed in a flat plate shape, and at the front end portion of the auxiliary jig body 14 in the rotation direction, a starting end portion of the stamper 2 is fixed by a screw 12. It is fastened together with 202. A movable body 32 is disposed at a rear end portion of the auxiliary jig body 14 in the rotation direction so as to be relatively movable in the circumferential direction of the heat roller 6,
A plurality of concave grooves 29 are formed on the rear end surface of the movable body 32 in the rotational direction at intervals in the longitudinal direction of the heat roller 6. The pressure roller 28 is mounted in each groove 29 via a one-way clutch 30, and the action of the one-way clutch 30 causes the end portion 204 of the stamper 2 to be held between the pressure plate 28 and the holding plate 26. The movement of the heat roller 6 toward the center is allowed and the movement of the heat roller 6 in the pull-out direction is restricted. As shown in FIGS. 9 and 10, the movable body 32 and the auxiliary jig body 14 are connected to each other by the bolts 20 at a plurality of positions spaced in the lengthwise direction of the heat roller 6 as in the first embodiment. The pressing roller 28 is urged toward the holding plate 26 together with the movable body 32 by the elastic member 22. In this way, the pressure roller 28 constitutes the clamp mechanism 24 by being opposed to the sandwiching plate 26 attached to the front end portion of the other auxiliary jig body 14.

In the apparatus for mounting the stamper of this embodiment, as shown in FIG. 6, the starting end portion 202 of the stamper 2 is fastened together with the holding plate 26 by the screw 12 to the tip end surface of the auxiliary jig main body 14, and then, As shown in FIG.
The stamper 2 is attached to the heat roller 6 by inserting the terminal end portion 204 of the stamper 2 between the pressure roller 28 and the holding plate 26 attached to the tip surface of the other auxiliary jig body 14.

The stamper 2 thus mounted is clamped between the pressure roller 28 and the clamping plate 26 by the urging force of the elastic member 22 at the terminal end portion 204 of the one-way clutch 30. By the action, the movement in the pulling-out direction is blocked, so that the heat roller 6 is integrally fixed.

At the time of embossing, as shown in FIG. 8, a load in the extension direction acts on the stamper 2, and even if the stamper 2 extends as shown by an imaginary line in FIG. The end portion 204 of the stamper 2 is pushed toward the central portion of the heat roller 6 with respect to the clamp mechanism 24, and the movement in the pull-out direction is restricted. As a result, the elongation of the stamper 2 is absorbed, and the lifting of the stamper 2 is prevented. Further, in this embodiment, the extension of the stamper 2 is absorbed by pulling the end portion 204 of the stamper 2 into the clamp mechanism 24. Therefore, the position of the end portion 204 of the stamper 2 is located at the heat roller 6. The stamper 2 does not move in the circumferential direction, so that the distance between the start end 202 and the end end 204 of the stamper 2 is kept constant.

In this embodiment, the bolt 20 and the elastic member 22 can be omitted by appropriately setting the gap between the pressure roller 28 and the holding plate 26.
In addition, the clamp mechanism 24 includes a holding plate fixed to the heat roller 6 and a holding piece that presses the end portion of the stamper to the holding plate as the end portion of the stamper moves in the pulling-out direction. It is also possible to configure with a cam mechanism or the like. In addition, in the first and second embodiments, the bolt 20 having a head having an outer diameter larger than that of the male screw portion is used to connect the auxiliary jig body 14 and the movable bodies 18 and 32. May have a male thread and a head with a uniform diameter, and when a bolt with a uniform diameter is used,
The bolt will function only as a guide when the movable bodies 18 and 32 are moved.

Furthermore, FIG. 1 shows the third embodiment of the present invention.
1 and FIG. 12 will be described. FIG. 11 is a cross-sectional view of a state in which the end portion of the stamper is attached, and FIG. 12 is a cross-sectional view of a state in which the auxiliary jig body and the divided block body are connected. In this embodiment, the coefficient of thermal expansion of the auxiliary jig 4 is substantially the same as that of the heat roller 6 and the starting end portion 20 of the stamper 2 is used.
2 and the part to which the terminal end portion 204 is attached (see FIGS. 11 and 12).
In the above, the coefficient of thermal expansion of the end portion 204 is shown) is larger than that of the other portions. That is, the auxiliary jig 4 is the auxiliary jig body 1
4 and divided blocks 42 arranged at both ends of the auxiliary jig main body 14 in the rotation direction. The auxiliary jig main body 14 and the divided blocks 42, as shown in FIG. The bolts 44 are connected to each other at a plurality of positions spaced in the direction. As shown in FIG. 11, the start end portion 202 (not shown) and the end portion 204 of the stamper 2 are attached to the end surfaces of the divided blocks 42 with screws 12.

With this structure, the divided block 42 is moved by the auxiliary jig main body 14 in accordance with the expansion of the stamper 2 due to the processing heat during the embossing process.
The thermal expansion of the stamper 2 is larger than that of the above, and the elongation of the stamper 2 is absorbed. Therefore, also in this embodiment, the lifting at the end portion of the stamper 2 during embossing is prevented. Since the auxiliary jig body 14 that occupies most of the auxiliary jig 4 has a thermal expansion coefficient that is substantially the same as that of the heat roller 6, thermal expansion due to heating occurs similarly to the heat roller 6, and There is no gap between the inner peripheral surface 14A and the outer peripheral surface 6A of the heat roller 6, and heat transfer is not hindered. In addition, the divided block 42
May be disposed on at least one end of the auxiliary jig body 14 in the rotation direction. In this case, the auxiliary jig body 14 should be disposed at the rear end of the rotation direction of the stamper 2 to which the terminal end 204 is attached. Is preferred.

[0027]

As described above, according to the present invention,
When the stamper is stretched during embossing, the second attaching means for supporting the end portion of the stamper in the rotation direction relatively moves the end portion of the stamper rearward in the rotation direction of the roller to increase the extension. Can be absorbed. As a result, it is possible to prevent the stamper from being lifted at the terminal end in the rotational direction, and to prevent occurrence of periodic transfer failure to the resin sheet. Further, by providing the second attaching means on the movable body that is movable in the circumferential direction of the roller, the above-mentioned end portion of the stamper can be smoothly moved, and the extension of the stamper can be reliably absorbed, and the end portion thereof can be surely absorbed. It is possible to efficiently absorb the floating in the part. Further, by biasing the movable body by the elastic member, the movable body can be surely moved with respect to the expansion of the stamper, and the absorbing action with respect to the expansion of the stamper can be further ensured. Also, by using a coil spring as the elastic member, when the elastic member is interposed between the auxiliary jig body and the movable body,
The structure can be simplified.

Further, the extension of the stamper is absorbed by pulling the end portion of the stamper into the inside of the clamp mechanism, so that the position of the end portion of the stamper does not move in the circumferential direction of the heat roller, and the stamper does not move. It is possible to maintain a constant distance between the start end and the end of the. Further, by pulling the stamper by rotating the pressure roller, the pulling operation can be performed smoothly, and the action of the one-way clutch can surely prevent the stamper from moving in the pulling direction. Further, by absorbing the expansion of the stamper by thermal expansion of the portion where the fixing means is provided, the expansion absorption of the stamper can be achieved with a simple configuration.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, and is a cross-sectional view of a state where a starting end portion of a stamper is attached.

FIG. 2 is a cross-sectional view of an attached state of a terminal end portion of a stamper.

FIG. 3 is a cross-sectional view of a state where the auxiliary jig body and the movable body are connected to each other.

FIG. 4 is a cross-sectional view of a state where the auxiliary jig body and the movable body are connected to each other.

FIG. 5 is a cross-sectional view showing a state where a movable body has moved.

FIG. 6 is a cross-sectional view of a mounted state of a starting end portion of a stamper according to a second embodiment.

FIG. 7 is a cross-sectional view of an attached state of a terminal portion of a stamper and a clamp mechanism portion.

FIG. 8 is a sectional view showing a state in which the elongation of the stamper is absorbed.

FIG. 9 is a cross-sectional view of a connected state of the auxiliary jig body and the movable body.

FIG. 10 is a cross-sectional view of a state in which the auxiliary jig body and the movable body are connected to each other.

FIG. 11 is a sectional view of the stamper of the third embodiment in a mounted state of a terminal end portion thereof.

FIG. 12 is a cross-sectional view of a state in which the auxiliary jig body and the divided block body are connected to each other.

FIG. 13 is a perspective view showing an outline of a heat roller, showing a conventional example of an embossing machine.

FIG. 14 is a vertical sectional view showing a fixing structure of a starting end portion of a stamper in a conventional embossing machine.

FIG. 15 is a vertical cross-sectional view showing a fixing structure of a terminal portion of a stamper in a conventional embossing machine.

FIG. 16 is a vertical cross-sectional view showing a deformed state of the stamper at the end portion of the stamper in the conventional embossing machine.

[Explanation of symbols]

 2 Stamper 202 Start end part 204 End part 4 Auxiliary jig 14 Auxiliary jig body 18, 32 Movable body 22 Elastic member 24 Clamp mechanism 26 Clamping plate 28 Pressure roller 30 One-way clutch 42 Divided block

Claims (11)

[Claims] 1. A pair of rollers, and a sheet-shaped stamper attached to the surface of at least one roller for forming a periodic pattern on the surface of a resin sheet inserted between these rollers. In the embossing machine, an auxiliary jig for attaching the stamper is attached to the roller to which the stamper is attached, and the auxiliary jig has a first attaching means for attaching a rotation direction start end portion of the stamper. , While attaching the rotational direction end portion of the stamper,
A stamper mounting device in an embossing machine, comprising a second mounting means that allows relative movement of the roller in the circumferential direction. 2. The auxiliary jig comprises an auxiliary jig main body and a movable body provided so as to be relatively movable along a circumferential direction of a roller with respect to a rotational direction end portion of the auxiliary jig main body. The stamper mounting device in an embossing machine according to claim 1, wherein the second mounting means includes the movable body. 3. Between the auxiliary jig body and the movable body,
The stamper mounting device in an embossing machine according to claim 2, further comprising an elastic member that urges both of them in a direction in which they are separated from each other along the circumferential direction of the roller. 4. The stamper mounting device in an embossing machine according to claim 3, wherein the elastic member is a coil spring. 5. The embossing process according to claim 1, wherein the second attaching means is constituted by a clamp mechanism that holds the end portion of the stamper and allows only the backward movement of the stamper in the rotational direction. Machine stamper mounting device. 6. The embossing according to claim 5, wherein the clamp mechanism is composed of a sandwiching plate fixed to the roller and a pressure roller for grasping an end portion of the stamper between the sandwiching plate. Mounting device for stampers in processing machines. 7. The stamper mounting device in an embossing machine according to claim 6, further comprising a one-way clutch for restricting a rotation direction of the pressure roller. 8. A pair of rollers, and a sheet-shaped stamper attached to the surface of at least one of the rollers to form a periodic pattern on the surface of a resin sheet inserted between these rollers. In the embossing machine, an auxiliary jig for attaching the stamper is attached to the roller to which the stamper is attached, and the auxiliary jig is at least one of an auxiliary jig body and a rotation direction of the auxiliary jig body. A stamper mounting device in an embossing machine, characterized in that the thermal expansion coefficient of the divided block is set to be larger than the thermal expansion coefficient of the auxiliary jig body. . 9. The apparatus for mounting a stamper in an embossing machine according to claim 8, wherein the coefficient of thermal expansion of the auxiliary jig body is set to be substantially the same as that of the roller. 10. The stamper mounting device in an embossing machine according to claim 8, wherein the divided blocks are provided at both ends of the auxiliary jig body in the rotation direction. 11. The roller to which the stamper is attached is a heat roller.
The stamper mounting device in the embossing machine according to 6, 7, 8, 9 or 10.