JP2024064555A - Release layer removing tool and release layer removing method - Google Patents

Abstract

[Problem] To provide a release layer remover and a release layer remover method that can easily remove the release layer from a urethane sheet material with double-sided tape without tearing the soft urethane foam layer. [Solution] A urethane sheet material 1 has a soft urethane foam layer 5 surface-bonded to one side 3a of a double-sided tape 3, and a release layer 7 laminated to the other side 3b of the double-sided tape 3. The urethane sheet material 1 has a cross-sectional structure in which the soft urethane foam layer 5 and the double-sided tape 3 are cut in the thickness direction while leaving the release layer 7. A release layer remover 10 is provided with a needle portion 12 having a tip portion 13 capable of penetrating the release layer 7 in the thickness direction of the release layer 7 on the surface of the urethane sheet material 1 on the side of the release layer 7. The needle portion 12 and the release layer 7 are close to each other, so that the tip portion 13 penetrates the release layer 7, and the tip portion 13 that has penetrated the release layer 7 pushes a part of the other side 3b of the double-sided tape 3 in the thickness direction, thereby peeling off the release layer 7 from the other side 3b of the double-sided tape 3. [Selected Figure] Figure 4

Description

The present invention relates to a peeling layer remover and a peeling layer remover method.

Conventionally, sheet materials with double-sided tape have been used for various purposes, such as as a seal. One example is a urethane sheet material in which double-sided tape is laminated to a material made of a porous foam such as urethane foam, and a release paper is laminated to protect the adhesive layer of the double-sided tape. This sheet material is cut into the material and double-sided tape, leaving the release paper behind, and is used by peeling the material and double-sided tape from the release paper. Meanwhile, Patent Document 1 discloses a release paper remover that inserts the tip of a needle into the release paper of double-sided tape attached to a material to remove the release paper.

Patent No. 6539808

However, when a urethane sheet material is cut into the material and double-sided tape, leaving the release paper behind, it is difficult to remove the cut material and double-sided tape together, even if a needle is inserted into the release paper as in the peeling tool described in Patent Document 1, because the release paper is not cut. Also, even if the double-sided tape of the urethane sheet material is cut, the adhesive layers of adjacent double-sided tapes will adhere to each other over time. For this reason, for example, in the case of a urethane sheet material using a material made of a porous foam such as soft urethane foam, when an attempt is made to pinch the edge of the soft urethane foam and peel it off together with the double-sided tape, the pulling force of the soft urethane foam is weak compared to the double-sided tape, which has a strong peeling force (resistance generated when peeling), and problems such as the soft urethane foam being torn off tend to occur.

The present invention was conceived in light of these points, and the problem that the present invention aims to solve is to provide a peeling layer remover and a peeling layer remover that can easily remove the release layer without tearing the soft urethane foam layer, even in a urethane sheet material in which a soft urethane foam layer and double-sided tape have been cut while leaving the release layer.

One feature of the release layer remover that solves the above problem is a release layer remover that removes the release layer of a urethane sheet material that is integral with the double-sided tape, including a soft urethane foam layer that is surface-bonded to one side of the double-sided tape and a release layer that is laminated on the other side opposite to the one side of the double-sided tape, and the urethane sheet material has a cross-sectional structure in which the soft urethane foam layer and the double-sided tape are cut in the thickness direction, leaving the release layer of the soft urethane foam layer, the double-sided tape, and the release layer. The release layer is provided on the surface of the urethane sheet material facing the release layer, with a needle portion having a tip portion that can penetrate the release layer in the thickness direction of the release layer, and the needle portion and the release layer are close to each other, so that the tip portion penetrates the release layer, and the tip portion that has penetrated the release layer pushes a part of the other side of the double-sided tape in the thickness direction, thereby peeling the release layer from the other side of the double-sided tape.

One feature and advantage of the above configuration is that the urethane sheet material has a cross-sectional structure in which the soft urethane foam layer and the double-sided tape are cut, leaving the release layer. The needle of the release layer remover has a tip that can penetrate the release layer in the thickness direction. The tip of the needle penetrates the release layer in the thickness direction by bringing the surface of the urethane sheet material on the release layer side into close proximity with the needle. The tip that penetrates the release layer abuts against the other surface of the double-sided tape and presses a part of the double-sided tape and the soft urethane foam layer without penetrating the double-sided tape. This causes the contact surfaces of the double-sided tape and the release layer to partly separate, allowing the release layer to be peeled off from the other surface of the double-sided tape. At this time, the soft urethane foam layer is pressed together with the double-sided tape, so that the release layer can be easily peeled off from the urethane sheet material without the soft urethane foam layer being torn off.

The release layer remover may be configured such that the urethane sheet material is composed of a plurality of strip-shaped sheets in which the soft urethane foam layer and the double-sided tape are cut into strips and separated, leaving the release layer, and the needle portion approaches one end of the strip-shaped sheet from the release layer side in the longitudinal direction, so that the tip portion penetrates the release layer and the strip-shaped sheet is pushed in the thickness direction to peel off the release layer from the other side of the double-sided tape at the one end.

One feature and advantage of the above configuration is that the urethane sheet material is composed of multiple strip-shaped sheets in which the soft urethane foam layer and the double-sided tape are cut while leaving the peeling layer. When the needle portion approaches one end of the strip-shaped sheet in the longitudinal direction, the tip of the needle portion penetrates the peeling layer in the thickness direction. The tip portion that penetrates the peeling layer abuts against the other side of the double-sided tape at one end of the strip-shaped sheet and presses the strip-shaped sheet. As a result, the contact surfaces of the double-sided tape and the peeling layer at one end of the strip-shaped sheet are separated from each other, and the peeling layer can be peeled off from the other side of the double-sided tape. At this time, the soft urethane foam layer and the double-sided tape are pressed together, so that even if the strip-shaped sheet is narrow and has a weak tensile force, the peeling layer can be easily peeled off without the soft urethane foam layer being torn. Furthermore, even if the adhesive layers of the double-sided tape of adjacent strip-shaped sheet bodies are attached to each other, the peeling layer can be easily peeled off for each strip-shaped sheet body.

The above-mentioned peeling layer remover may be configured to include a holding mechanism that holds the urethane sheet material so as to restrict movement of the surface of the peeling layer side in the in-plane direction, and a needle base on which the needle portion is placed so that the tip of the needle portion faces the surface of the urethane sheet material on the peeling layer side, and at least one of the holding mechanism and the needle base may be configured to be movable forward and backward in the thickness direction of the urethane sheet material so as to move the tip portion closer to and away from the surface of the urethane sheet material on the peeling layer side.

One feature and advantage of the above configuration is that the release layer remover is configured such that at least one of the holding mechanism and the needle base can move forward and backward in the thickness direction of the urethane sheet material so as to move the tip of the needle closer to and farther from the surface of the urethane sheet material on the release layer side. The tip of the needle set on the needle base faces the surface of the urethane sheet material on the release layer side held by the holding mechanism. The holding mechanism restricts the movement of the urethane sheet material in the in-plane direction of the surface on the release layer side. This allows the tip of the needle set on the needle base to move closer to a certain position on the surface on the release layer side of the urethane sheet material while the position of the urethane sheet material is fixed. In other words, the in-plane positional deviation of the urethane sheet material can be suppressed from the time the tip of the needle penetrates the release layer until the release layer is peeled off from the other surface of the double-sided tape.

The holding mechanism of the above-mentioned peeling layer remover may be configured to have an adsorption platform that adsorbs and holds the urethane sheet material from the peeling layer side, and a plurality of pinholes that are aligned in a straight line on the adsorption platform and through which the tips of the needles pass.

One of the features and advantages of the above is that the peeling layer remover is equipped with an adsorption platform that adsorbs and holds the urethane sheet material from the peeling layer side. The urethane sheet material placed on the adsorption platform has the surface facing the peeling layer adsorbed. This makes it possible to prevent the peeling layer from shifting from its fixed position when the tip of the needle is penetrated into the peeling layer. The adsorption platform also has multiple pinholes through which the tip of the needle passes. By placing and fixing the urethane sheet material on the adsorption platform so that one end of the strip-shaped sheet overlaps the pinholes, one end of the strip-shaped sheet can be pushed up at a fixed position by the tip through the pinholes.

In the above-mentioned peeling layer remover, the urethane sheet material may extend long in the longitudinal direction of the strip-shaped sheet body so that the edge of the peeling layer is positioned outside the one end of the strip-shaped sheet body, and the holding mechanism may have a first holding portion that holds the extended edge of the peeling layer so as to restrict movement in the thickness direction of the urethane sheet material, and a second holding portion that holds the urethane sheet material inside the one end of the strip-shaped sheet body in the longitudinal direction so as to restrict movement in the thickness direction of the urethane sheet material.

One of the features and advantages of the above is that the urethane sheet material has an edge portion of the peeling layer that is longer than one end of the strip-shaped sheet body. The edge portion of the peeling layer is restricted from moving in the thickness direction of the urethane sheet material by the first holding portion. This makes it possible to prevent the edge portion of the peeling layer from shifting from its fixed position when the tip portion of the needle portion is penetrated through the peeling layer. Furthermore, the movement of the urethane sheet material in the thickness direction of the urethane sheet material is restricted by the second holding portion on the inside of one end portion in the longitudinal direction of the strip-shaped sheet body. In this way, by holding the peeling layer at two points between which one end portion of the strip-shaped sheet body is located, it is possible to further prevent the peeling layer from shifting. Therefore, the tip portion of the needle portion can be passed through the peeling layer while the position of the urethane sheet material is stabilized, and one end portion of the strip-shaped sheet body can be pushed by the tip portion.

The needle base of the above-mentioned peeling layer remover may be configured so that the needle portions are aligned in a straight line and arranged side by side, and the ends of the aligned strip-shaped sheets on the urethane sheet material are spaced apart from each other.

One of the features and advantages of the above is that the needle base has multiple needles aligned and spaced apart from one end of each of the multiple strip-shaped sheets. With this configuration, the needles are brought close to the release layer of the urethane sheet material, so that the tips of the multiple needles can press one end of each of the multiple strip-shaped sheets simultaneously. This makes it possible to improve the efficiency of the process of peeling off the release layer.

One feature of the peeling layer removing method that solves the above problem is a peeling layer removing method for peeling off a urethane sheet material that is integral with the double-sided tape, including a soft urethane foam layer that is surface-bonded to one side of the double-sided tape and a peeling layer that is laminated on the other side opposite to the one side of the double-sided tape, and that includes the soft urethane foam layer that is surface-bonded to one side of the double-sided tape and the peeling layer that is laminated on the other side opposite to the one side of the double-sided tape, and the urethane sheet material has a cross-sectional structure in which the soft urethane foam layer and the double-sided tape are cut in the thickness direction, leaving the soft urethane foam layer, the double-sided tape, and the peeling layer. By bringing a needle portion having a tip that can penetrate the peeling layer in the thickness direction into close proximity with the peeling layer side of the urethane sheet material, the tip penetrates the peeling layer, and the tip that has penetrated the peeling layer pushes a part of the other side of the double-sided tape in the thickness direction, thereby peeling off the peeling layer from the other side of the double-sided tape.

One of the above features and advantages is that the urethane sheet material has a cross-sectional structure in which the soft urethane foam layer and the double-sided tape are cut, leaving the release layer. The needle portion has a tip portion that can penetrate the release layer in the thickness direction. By bringing the surface of the urethane sheet material facing the release layer and the needle portion close to each other, the tip portion of the needle portion penetrates the release layer in the thickness direction. The tip portion that penetrates the release layer abuts against the other surface of the double-sided tape and presses against a part of the double-sided tape and the soft urethane foam layer without penetrating the double-sided tape. This causes the contact surfaces of the double-sided tape and the release layer to partially separate, allowing the release layer to be peeled off from the other surface of the double-sided tape. At this time, the soft urethane foam layer is pressed together with the double-sided tape, so the release layer can be easily peeled off from the urethane sheet material without the soft urethane foam layer being torn off.

By adopting the above-mentioned configuration or method, the present invention can provide a release layer remover and a release layer remover that can easily remove the release layer without tearing the soft urethane foam layer, even in a urethane sheet material in which a soft urethane foam layer and double-sided tape have been cut while leaving the release layer.

FIG. 2 is a schematic diagram showing a urethane sheet material and a release layer remover according to the first embodiment. 3 is a diagram showing a schematic diagram of a state in which a urethane sheet material is placed on the suction platform of the release layer remover according to the first embodiment. FIG. 4 is a cross-sectional view showing a schematic state in which a urethane sheet material is placed on the suction platform according to the first embodiment. FIG. 1 is a cross-sectional view showing a state in which the tip of the needle of the release layer remover according to the first embodiment penetrates the release layer of the urethane sheet material and pushes up the double-sided tape and the soft urethane foam layer. FIG. 13 is a cross-sectional view showing a schematic state in which a urethane sheet material is placed on a mounting table of a release layer remover according to a second embodiment. FIG.

<Configuration of release layer remover (first embodiment)>
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A release layer remover 10 according to a first embodiment is a release layer remover that removes a release layer 7 of a urethane sheet material 1 that faces integrally with a double-sided tape 3, with reference to Figs. 1 and 4.

The double-sided tape 3 is a well-known type that is made by applying an adhesive to both sides of a substrate such as paper, cloth, or plastic film, and then treating the back surface by inserting a release liner to prevent the adhesive surfaces from sticking together.

As shown in Figs. 1 and 3, the urethane sheet material 1 is a substantially rectangular sheet material that includes a double-sided tape 3, a soft urethane foam layer 5, and a release layer 7. The length of each side of the urethane sheet material 1 is set arbitrarily, and the urethane sheet material 1 has a long side 1a and a short side 1b. The urethane sheet material 1 may also be substantially square.

The soft urethane foam layer 5 is surface-bonded to the upper surface 3a (one side) of the double-sided tape 3 by the adhesive of the double-sided tape 3. The soft urethane foam layer 5 is a plastic foam with interconnected air bubbles, which makes it soft and resilient.

The release layer 7 is laminated on the underside 3b (the other side) of the double-sided tape 3, which is the side opposite the soft urethane foam layer 5. For example, a release paper or release paper made of a paper base material with a sealing layer sandwiched therebetween and coated with a release agent is used as the release layer 7. The release layer 7 is laminated so that the surface on the release agent side is in contact with the underside 3b of the double-sided tape 3, and protects the adhesive of the double-sided tape 3.

The urethane sheet material 1 has a cross-sectional structure in which the soft urethane foam layer 5 and the double-sided tape 3 are cut in the thickness direction, leaving the peeling layer 7, out of the soft urethane foam layer 5, the double-sided tape 3, and the peeling layer 7. The soft urethane foam layer 5 and the double-sided tape 3 are cut into strips at predetermined intervals along the long side 1a of the urethane sheet material 1, and a plurality of strip-shaped sheet bodies 2 are formed by separating the strips at the boundaries of the cuts. Each strip-shaped sheet body 2 is aligned in a direction intersecting the long side 1a of the urethane sheet material 1, separated from the adjacent strip-shaped sheet body 2. In other words, one end 2a of the strip-shaped sheet body 2 is aligned along the short side 1b of the urethane sheet material 1.

As shown in Figures 1 and 2, the peeling layer remover 10 includes an adsorption platform 16 (holding mechanism) that holds the urethane sheet material 1, a needle portion 12, and a needle base 14 on which the needle portion 12 is placed.

The suction platform 16 is made of a plate-like member, and has an adsorption surface 16a on its surface that adsorbs and holds the urethane sheet material 1 with air. The adsorption surface 16a has a plurality of suction holes (not shown) that allow the surface of the urethane sheet material 1 facing the peeling layer 7 to be adsorbed over the entire surface. With this configuration, the suction platform 16 holds the surface of the urethane sheet material 1 facing the peeling layer 7 in a manner that restricts movement in the in-plane direction.

As shown in Figs. 1 and 3, the suction base 16 has a plurality of pinholes 18 formed therethrough in the thickness direction. The pinholes 18 are aligned in a straight line in accordance with the position of one end 2a of the belt-shaped sheet 2 in the urethane sheet material 1 that is held by suction. The pinholes 18 are set to a size that allows the needles 12 to pass through.

As shown in Figures 1 and 2, first and second positioning plates 21, 22 for determining the position of the urethane sheet material 1 are installed on the suction surface 16a of the suction table 16 in a direction perpendicular to the suction surface 16a. The first positioning plate 21 is L-shaped in a plan view. One side of the first positioning plate 21 is located outside the row of pinholes 18 along the row of pinholes 18, and the pinhole 18 at the end of the row is located inside the corner formed by the one side and the other side. The second positioning plate 22 is disposed outside the aligned pinholes 18 at a position separated from the first positioning plate 21 along the direction of the row of pinholes 18. The corner of one end 2a of the strip-shaped sheet 2 on the urethane sheet material 1 is aligned with the first positioning plate 21, and the short side 1b of the urethane sheet material 1 to which the one end 2a of the strip-shaped sheet 2 is aligned is aligned with the second positioning plate 22, so that the urethane sheet material 1 can be placed in a fixed position on the suction platform 16.

The needle portion 12 is, for example, a metal needle-shaped member. As shown in Figures 3 and 4, the tip portion 13 of the needle portion 12 is formed on the surface of the urethane sheet material 1 facing the release layer 7 in a shape that allows it to penetrate the release layer 7 in the thickness direction of the release layer 7. However, the size and thickness of the needle portion 12 including the tip portion 13 are set so that it does not penetrate the base material of the double-sided tape 3.

As shown in Figs. 1 and 2, the needle base 14 has a plurality of needles 12 arranged on the surface of a plate-like member. The needles 12 are aligned in a straight line with their tips 13 pointing upward. The spacing between the needles 12 is set according to the width of the belt-like sheet 2 of the urethane sheet material 1. The needle base 14 is arranged below the suction base 16 so that the needles 12 are located directly below the respective needle holes 18 provided in the suction base 16. The needle base 14 is supported by a support member so that it can move forward and backward in the vertical direction. When the urethane sheet material 1 is placed on the suction base 16, the tips 13 of the needles 12 face the surface of the urethane sheet material 1 on the peeling layer 7 side. Then, as the needle base 14 moves forward and backward, the surface of the urethane sheet material 1 on the peeling layer 7 side and the tips 13 move closer to and away from each other (see Figs. 3 and 4).

<Release Layer Peeling Step (First Embodiment)>
Next, a release layer removing method for removing the release layer 7 from the urethane sheet material 1 using the release layer remover 10 according to the first embodiment will be described.

As shown in Figures 1 and 2, the urethane sheet material 1 with the double-sided tape 3 attached is placed on the suction table 16 so that the surface on the release layer 7 side faces the suction surface 16a of the suction table 16. At this time, the corner of one end 2a of the strip-shaped sheet body 2 of the urethane sheet material 1 is aligned with the first positioning plate 21, and the short side 1b of the urethane sheet material 1 with which the one end 2a of the strip-shaped sheet body 2 is aligned is aligned with the second positioning plate 22. The surface of the urethane sheet material 1 on the release layer 7 side is adsorbed and held by air from the suction hole. This fixes the position of the urethane sheet material 1.

As shown in FIG. 4, the needle base 14 is raised toward the back surface 16b of the suction base 16. This brings the release layer 7 of the urethane sheet material 1 and the needles 12 installed on the needle base 14 into close proximity. Then, the tip portions 13 of the needles 12 pass through the pinholes 18 of the suction base 16 and penetrate the release layer 7 in the thickness direction. The tip portions 13 that penetrate the release layer 7 come into contact with the lower surface 3b of the double-sided tape 3 at one end 2a of the strip-shaped sheet body 2, and push up the strip-shaped sheet body 2. This causes the contact surfaces of the double-sided tape 3 and the release layer 7 at one end 2a of the strip-shaped sheet body 2 to separate from each other. Then, the one end 2a of the strip-shaped sheet body 2, in which the soft urethane foam layer 5 and the double-sided tape 3 are integrated, is pulled in the direction of peeling from the release layer 7, and the release layer 7 is peeled off from the lower surface 3b of the double-sided tape 3. In other words, the strip-shaped sheet body 2 is peeled off from the peeling layer 7.

Because the width of the strip-shaped sheet body 2 is narrow, if the soft urethane foam layer 5 is pulled upward (in a direction perpendicular to the surface of the urethane sheet material 1) using, for example, a biaxial cylinder, the resistance, i.e., the peeling force, generated when peeling the double-sided tape 3 from the peeling layer 7 is strong, and the soft urethane foam layer 5 is easily torn off. In this regard, by pushing up one end 2a of the strip-shaped sheet body 2 with the peeling layer peeling tool 10, the soft urethane foam layer 5 and the double-sided tape 3 can be pulled together and the one end 2a can be pulled. Therefore, the strip-shaped sheet body 2 can be easily peeled off from the peeling layer 7 without the soft urethane foam layer 5 being torn off. Furthermore, even if the adhesive layers of the double-sided tape 3 of adjacent strip-shaped sheet bodies 2 are attached to each other, the strip-shaped sheet body 2 can be neatly peeled off from the peeling layer 7 by pulling the soft urethane foam layer 5 and the double-sided tape 3 together for each strip-shaped sheet body 2.

In addition, in order to reduce the peeling force when the soft urethane foam layer 5 is pulled, it is possible to pinch the soft urethane foam layer 5 with the hand of a multi-axis robot, for example, and peel it off while twisting it in a direction that reduces the peeling force. In this regard, by pushing up one end 2a of the strip-shaped sheet body 2 with the peeling layer remover 10, the strip-shaped sheet body 2 can be easily pulled upward and peeled off from the peeling layer 7 without twisting the strip-shaped sheet body 2. Therefore, since a biaxial cylinder, which is less expensive than a multi-axis robot, can be used, the cost of the device can be reduced.

<Configuration of release layer remover (second embodiment)>
Next, a second embodiment will be described. Referring to Fig. 5, the release layer remover 30 according to this embodiment is a release layer remover that removes the release layer 7 of the urethane sheet material 8 that faces integrally with the double-sided tape 3. Regarding the configuration of the release layer remover 30 and the configuration of the urethane sheet material 8 according to this embodiment, the configuration and the effect that are substantially the same as those of the first embodiment will be omitted, and the different configuration will be mainly described.

As shown in FIG. 5, the urethane sheet material 8 includes a double-sided tape 3, a soft urethane foam layer 5, and a release layer 7. The soft urethane foam layer 5 is surface-bonded to the upper surface 3a (one surface) of the double-sided tape 3 by the adhesive of the double-sided tape 3. The release layer 7 is laminated to the lower surface 3b (the other surface) of the double-sided tape 3. The urethane sheet material 8 is composed of a plurality of strip-shaped sheet bodies 9. In the longitudinal direction of the strip-shaped sheet bodies 9, the edge portion 7a of the release layer 7 extends farther outward than one end portion 9a of the strip-shaped sheet bodies 9.

The peeling layer remover 30 includes a needle portion 12 and a needle base 14 on which the needle portion 12 is placed. The configurations of the needle portion 12 and the needle base 14 are the same as those in the first embodiment, and therefore a description thereof will be omitted. The peeling layer remover 30 also includes a mounting base 31, a first pressing portion 33, and a second pressing portion 34 as a holding mechanism for holding the urethane sheet material 8.

The mounting base 31 is made of a plate-like member and has a mounting surface 31a on which the urethane sheet material 8 is placed. The mounting base 31 also has a plurality of pinholes 36 formed therein, penetrating the mounting base 31 in the thickness direction. The pinholes 36 are aligned in a straight line in accordance with the position of one end 9a of the strip-shaped sheet body 9 in the urethane sheet material 8 placed on the mounting surface 31a. The pinholes 36 are set to a size that allows the needle portion 12 to pass through.

The first pressing portion 33 is made of, for example, a square rod-shaped member, and extends along the short side of the urethane sheet material 8 at least the length of the short side of the urethane sheet material 8. The first pressing portion 33 is supported on the upper side of the mounting table 31 and outside the row of pinholes 36 (left side in FIG. 5) so that it can move forward and backward in the vertical direction. The first pressing portion 33 comes close to the mounting surface 31a, so that it abuts against the upper surface of the edge portion 7a of the peeling layer 7 and holds the edge portion 7a of the peeling layer 7 between the first pressing portion 33 and the mounting surface 31a. The first pressing portion 33 and the mounting table 31 function as a first holding portion that holds the extended edge portion 7a of the peeling layer 7 so as to restrict movement in the thickness direction of the urethane sheet material 8.

The second pressing portion 34 is made of, for example, a square rod-shaped member, and extends along the short side of the urethane sheet material 8 at least the length of the short side of the urethane sheet material 8. The second pressing portion 34 is supported on the upper side of the mounting table 31 so that it can move forward and backward in the vertical direction. When the second pressing portion 34 approaches the mounting surface 31a, it comes into contact with the upper surface of the soft urethane foam layer 5 and holds the urethane sheet material 8 between the second pressing portion 34 and the mounting surface 31a. The second pressing portion 34 and the mounting table 31 function as a second holding portion that holds the urethane sheet material 8 inside one end 9a in the longitudinal direction of the strip-shaped sheet body 9 (right side in FIG. 5) so as to restrict movement of the urethane sheet material 8 in the thickness direction.

The mounting base 31, the first pressing portion 33, and the second pressing portion 34 are configured as described above to hold the surface of the urethane sheet material 8 facing the peeling layer 7 so as to restrict movement in the in-plane direction.

A positioning plate (not shown) may also be installed on the mounting table 31. For example, one positioning plate is placed along the direction of the row of pinholes 36 so that when the urethane sheet material 8 is placed, the edge portion 7a of the peeling layer 7 is located outside the row of pinholes 36 and one end portion 9a of the strip-shaped sheet body 9 is located above each pinhole 18. In addition, one positioning plate is placed along the long side of the urethane sheet material 8. In this way, the edge portion 7a of the peeling layer 7 and the long side of the urethane sheet material 8 can be aligned with the respective positioning plates to position the urethane sheet material 8 in a fixed position on the mounting surface 31a.

<Release Layer Peeling Step (Second Embodiment)>
Next, a release layer removing method for removing the release layer 7 of the urethane sheet material 8 using the release layer remover 30 according to the second embodiment will be described.

The urethane sheet material 8 with double-sided tape is placed on the mounting table 31 so that the surface on the peeling layer 7 side faces the mounting surface 31a of the mounting table 31. As shown in FIG. 5, the urethane sheet material 8 is placed so that the edge portion 7a of the peeling layer 7 is located outside the row of pinholes 36 (left side in FIG. 5) and one end portion 9a of the strip-shaped sheet body 9 is located above each pinhole 36. The first pressing portion 33 is lowered so as to abut against the edge portion 7a of the peeling layer 7, and the edge portion 7a of the peeling layer 7 is sandwiched between the first pressing portion 33 and the mounting surface 31a. The second pressing portion 34 is lowered so as to abut against the upper surface of the soft urethane foam layer 5, and the urethane sheet material 8 is sandwiched between the second pressing portion 34 and the mounting surface 31a. This fixes the position of the urethane sheet material 8.

The needle base 14 is raised toward the back surface 31b of the mounting base 31. This brings the release layer 7 of the urethane sheet material 1 and the needles 12 installed on the needle base 14 into close proximity. Then, the tip portions 13 of the needles 12 pass through the respective pin holes 36 of the mounting base 31 and penetrate the release layer 7 in the thickness direction. The tip portions 13 that penetrate the release layer 7 come into contact with the underside 3b of the double-sided tape 3 at one end 9a of the strip-shaped sheet body 9, and push up the strip-shaped sheet body 9. This causes the contact surfaces of the double-sided tape 3 and the release layer 7 at one end 9a of the strip-shaped sheet body 9 to separate from each other. Then, the one end 9a of the strip-shaped sheet body 9, in which the soft urethane foam layer 5 and the double-sided tape 3 are integrated, is pulled in the direction of peeling from the release layer 7, thereby peeling off the release layer 7 from the underside 3b of the double-sided tape 3. In other words, the strip-shaped sheet body 9 is peeled off from the peeling layer 7.

Effects of the embodiment
According to the first and second embodiments, the urethane sheet material 1, 8 has a cross-sectional structure in which the soft urethane foam layer 5 and the double-sided tape 3 are cut leaving the peeling layer 7. The needle portion 12 of the peeling layer remover 10 has a tip portion 13 capable of penetrating the peeling layer 7 in the thickness direction. The needle portion 12 is close to the surface of the urethane sheet material 1, 8 on the peeling layer 7 side, so that the tip portion 13 of the needle portion 12 penetrates the peeling layer 7 in the thickness direction. The tip portion 13 that penetrates the peeling layer 7 abuts against the lower surface 3b (the other surface) of the double-sided tape 3 and presses a part of the double-sided tape 3 and the soft urethane foam layer 5 without penetrating the double-sided tape 3. As a result, the contacting surfaces of the double-sided tape 3 and the peeling layer 7 are partially separated from each other, and the peeling layer 7 can be peeled off from the lower surface 3b of the double-sided tape 3. At this time, the soft urethane foam layer 5 is pressed together with the double-sided tape 3, so that the peeling layer 7 can be easily peeled off from the urethane sheet material 1, 8 without the soft urethane foam layer 5 being torn off.

The urethane sheet material 1, 8 according to the first and second embodiments is composed of a plurality of strip-shaped sheets 2, 9 in which the soft urethane foam layer 5 and the double-sided tape 3 are cut leaving the peeling layer 7. The needle portion 12 approaches one end 2a, 9a in the longitudinal direction of the strip-shaped sheet 2, 9, so that the tip portion 13 of the needle portion 12 penetrates the peeling layer 7 in the thickness direction. The tip portion 13 that penetrates the peeling layer 7 abuts against the lower surface 3b (the other surface) of the double-sided tape 3 at one end 2a, 9a of the strip-shaped sheet 2, 9, and presses the strip-shaped sheet 2, 9. As a result, the contacting surfaces of the double-sided tape 3 and the peeling layer 7 at one end 2a, 9a of the strip-shaped sheet 2, 9 separate from each other, and the peeling layer 7 can be peeled off from the lower surface 3b of the double-sided tape 3. At this time, the soft urethane foam layer 5 and the double-sided tape 3 are pressed together, so even if the strip-shaped sheet bodies 2, 9 are narrow and have a weak pulling force, the release layer 7 can be easily peeled off without tearing the soft urethane foam layer 5. Furthermore, even if the adhesive layers of the double-sided tape 3 of adjacent strip-shaped sheet bodies 2, 9 are attached to each other, the release layer 7 can be easily peeled off for each strip-shaped sheet body 2, 9.

The peeling layer remover 10 according to the first embodiment is configured such that at least one of the suction base 16 (holding mechanism) and the needle base 14 can move forward and backward in the thickness direction of the urethane sheet material 1 so as to move the tip 13 closer to and farther from the surface of the urethane sheet material 1 on the peeling layer 7 side. The tip 13 of the needle 12 installed on the needle base 14 faces the surface of the urethane sheet material 1 on the peeling layer 7 side held by the suction base 16. The urethane sheet material 1 is restricted in its in-plane movement on the surface on the peeling layer 7 side by the suction base 16. This allows the tip 13 of the needle 12 installed on the needle base 14 to move closer to a certain position on the surface on the peeling layer 7 side of the urethane sheet material 1 while the position of the urethane sheet material 1 is fixed. In other words, the in-plane positional deviation of the urethane sheet material 1 can be suppressed from the time when the tip 13 of the needle 12 penetrates the peeling layer 7 until the peeling layer 7 is peeled off from the other surface of the double-sided tape 3. The mounting base 31 and needle base 14 of the peeling layer remover 30 according to the second embodiment have the same effect.

The peeling layer remover 10 according to the first embodiment is provided with an adsorption platform 16 (holding mechanism) that adsorbs and holds the urethane sheet material 1 from the peeling layer 7 side. The urethane sheet material 1 placed on the adsorption platform 16 has the surface on the peeling layer 7 side adsorbed. This makes it possible to prevent the peeling layer 7 from shifting from a fixed position when the tip 13 of the needle 12 is penetrated through the peeling layer 7. The adsorption platform 16 also has a plurality of pinholes 18 through which the tip 13 of the needle 12 passes. By placing and fixing the urethane sheet material 1 on the adsorption platform 16 so that one end 2a of the strip-shaped sheet body 2 overlaps the pinhole 18, the tip 13 can push up one end 2a of the strip-shaped sheet body 2 at a fixed position through the pinhole 18.

The peeling layer remover 30 according to the second embodiment is provided with a mounting base 31 (first holding portion, second holding portion), a first pressing portion 33 (first holding portion), and a second pressing portion 34 (second holding portion) as a holding mechanism for holding the urethane sheet material 8. The urethane sheet material 8 also has an edge portion 7a of the peeling layer 7 that extends longer than one end 9a of the strip-shaped sheet body 9. The edge portion 7a of the peeling layer 7 is restricted from moving in the thickness direction of the urethane sheet material 8 by the mounting base 31 and the first pressing portion 33. This makes it possible to prevent the edge portion 7a of the peeling layer 7 from shifting from a fixed position when the tip portion 13 of the needle portion 12 is penetrated through the peeling layer 7. Furthermore, the movement of the urethane sheet material 8 in the thickness direction is restricted by the mounting base 31 and the second pressing portion 34 on the inside of one end portion 9a in the longitudinal direction of the strip-shaped sheet body 9. In this way, by holding the release layer 7 at two points between which the one end 9a of the strip-shaped sheet body 9 is positioned, it is possible to further prevent the release layer 7 from shifting out of position. Therefore, with the position of the urethane sheet material 8 stabilized, the tip 13 of the needle portion 12 can be passed through the release layer 7, and the tip 13 can be used to push the one end 9a of the strip-shaped sheet body 9.

The needle base 14 according to the first and second embodiments has multiple needles 12 aligned and spaced apart from the ends 2a, 9a of the strip-shaped sheets 2, 9. With this configuration, the ends 2a, 9a of the strip-shaped sheets 2, 9 can be pushed simultaneously by the tips 13 of the multiple needles 12 by bringing the multiple needles 12 close to the peeling layer 7 of the urethane sheet material 1, 8. This makes it possible to improve the efficiency of the process of peeling off the peeling layer 7.

According to the peeling layer peeling method for peeling off the peeling layer 7 of the urethane sheet material 1, 8 according to the first and second embodiments, the needle portion 12 is brought into close proximity with the surface of the urethane sheet material 1, 8 on the peeling layer 7 side, so that the tip portion 13 of the needle portion 12 penetrates the peeling layer 7 in the thickness direction. The tip portion 13 that penetrates the peeling layer 7 abuts against the lower surface 3b (the other surface) of the double-sided tape 3, and presses a part of the double-sided tape 3 and the soft urethane foam layer 5 without penetrating the double-sided tape 3. As a result, the contacting surfaces of the double-sided tape 3 and the peeling layer 7 are partially separated from each other, and the peeling layer 7 can be peeled off from the lower surface 3b of the double-sided tape 3. At this time, the soft urethane foam layer 5 is pressed together with the double-sided tape 3, so that the peeling layer 7 can be easily peeled off from the urethane sheet material 1, 8 without the soft urethane foam layer 5 being torn off.

According to the peeling layer removing tool and peeling layer removing method of the first and second embodiments, the soft urethane foam layer 5 and the double-sided tape 3 at one end 2a of the strip-shaped sheet body 2, 9 are pushed up together. As a result, even if the strip-shaped sheet body 2, 9 is pulled in a direction in which the peeling force is stronger, i.e., in a direction perpendicular to the surface of the urethane sheet material 1, the soft urethane foam layer 5 does not tear, and the strip-shaped sheet body 2, 9 can be neatly peeled off from the peeling layer 7. Furthermore, since the strip-shaped sheet body 2, 9 can be pulled using a biaxial cylinder or the like, the cost of the device can be reduced compared to the case of using a multiaxial robot or the like to reduce the peeling force when pulling the soft urethane foam layer 5.

The peeling layer remover and peeling layer remover according to the present invention are not limited to the appearance and configuration described in the above embodiment, but can be embodied in various other forms by various modifications, additions, deletions, and combinations of configurations without changing the gist of the present invention.

The peeling layer remover 10 according to the first embodiment has been described above as an example in which the needle base 14 is movable forward and backward, but is not limited thereto. For example, the suction base 16 (holding mechanism) may be configured to be movable forward and backward. Also, both the needle base 14 and the suction base 16 may be configured to be movable forward and backward.

The needle base 14 according to the first and second embodiments has multiple needles 12, and each needle 12 is simultaneously close to one end 2a, 9a of the multiple strip-shaped sheet bodies 2, 9. This is not limited to the above, and for example, a needle base with one needle 12 may be configured to move along the direction of the row of needle holes 18, 36 and push up one end 2a, 9a of the strip-shaped sheet bodies 2, 9 one by one.

The urethane sheet materials 1, 8 in the first and second embodiments described above are examples in which the strip-shaped sheets 2, 9 are configured, but the urethane sheet materials according to the present invention also include those in which the soft urethane foam layer and double-sided tape are cut at intervals wider than those of the strip-shaped sheets 2, 9. The soft urethane foam layer and double-sided tape may be cut in either the long or short direction of the urethane sheet material.

1 Urethane sheet material 2 Belt-shaped sheet body 2a One end portion 3 Double-sided tape 3a Upper surface (one surface)
3b Bottom surface (other surface)
5 Soft urethane foam layer 7 Release layer 7a Edge portion 8 Urethane sheet material 9 Belt-shaped sheet body 9a One end portion 10 Release layer remover 12 Needle portion 13 Tip portion 14 Needle base 16 Suction base (holding mechanism)
18 Pinhole 21 First positioning plate 22 Second positioning plate 30 Release layer peeling tool 31 Placement table (first holding portion and second holding portion of holding mechanism)
33 First pressing portion (first holding portion of holding mechanism)
34 Second pressing portion (second holding portion of holding mechanism)
36 Pinhole

Claims (7)

A release layer remover for removing a release layer from a urethane sheet material that is integral with the double-sided tape, the release layer including a soft urethane foam layer that is surface-bonded to one side of the double-sided tape and a release layer that is laminated on the other side opposite to the one side of the double-sided tape,
The urethane sheet material has a cross-sectional structure in which the soft urethane foam layer and the double-sided tape are cut in a thickness direction, leaving the release layer out of the soft urethane foam layer, the double-sided tape, and the release layer,
a needle portion having a tip portion capable of penetrating the release layer in a thickness direction of the release layer on a surface of the urethane sheet material facing the release layer;
The release layer remover has a tip portion that penetrates the release layer when the needle portion and the release layer come into close proximity, and the tip portion that has penetrated the release layer presses a portion of the other side of the double-sided tape in the thickness direction, thereby peeling the release layer from the other side of the double-sided tape. The peeling layer remover according to claim 1,
The urethane sheet material is configured of a plurality of strip-shaped sheets in which the soft urethane foam layer and the double-sided tape are cut into strips and separated, leaving the release layer, and aligned in a separated state,
The needle portion approaches one end of the strip-shaped sheet in the longitudinal direction from the peel-off layer side, so that the tip portion penetrates the peel-off layer and pushes the strip-shaped sheet in the thickness direction, thereby peeling the peel-off layer from the other side of the double-sided tape at the one end. The peeling layer remover according to claim 2,
a holding mechanism that holds the urethane sheet material so as to restrict movement of the surface of the release layer side in an in-plane direction;
a needle base on which the needle portion is disposed so that the tip portion faces the surface of the urethane sheet material on the release layer side,
A release layer remover, wherein at least one of the holding mechanism and the needle base is movable back and forth in the thickness direction of the urethane sheet material so as to move the release layer side surface of the urethane sheet material closer to and away from the tip portion. The peeling layer remover according to claim 3,
The holding mechanism includes:
an adsorption table that adsorbs and holds the urethane sheet material from the release layer side;
The release layer remover has a plurality of pinholes arranged in a straight line on the suction platform, through which the tip of the needle portion passes. The peeling layer remover according to claim 3,
the urethane sheet material extends long in the longitudinal direction of the belt-shaped sheet body such that an edge portion of the release layer is positioned outside the one end portion of the belt-shaped sheet body,
The holding mechanism includes:
a first holding portion that holds the extended edge portion of the release layer so as to restrict movement of the extended edge portion of the release layer in a thickness direction of the urethane sheet material;
a second holding portion that holds the urethane sheet material inside the one end portion in the longitudinal direction of the band-shaped sheet body so as to restrict movement of the urethane sheet material in the thickness direction. The peeling layer remover according to any one of claims 3 to 5,
The needle base has a plurality of needle portions aligned in a straight line, and the one ends of the plurality of aligned strip-shaped sheet bodies on the urethane sheet material are spaced apart from each other and close to each other. A method for peeling off a release layer of a urethane sheet material including a soft urethane foam layer surface-bonded to one side of a double-sided tape and a release layer laminated on the other side opposite to the one side of the double-sided tape, the release layer being integrally attached to the double-sided tape, comprising:
The urethane sheet material has a cross-sectional structure in which the soft urethane foam layer and the double-sided tape are cut in a thickness direction, leaving the release layer out of the soft urethane foam layer, the double-sided tape, and the release layer,
A method for removing a release layer, comprising: bringing a needle having a tip capable of penetrating the release layer in the thickness direction of the release layer close to the surface of the urethane sheet material facing the release layer, so that the tip penetrates the release layer, and pressing a portion of the other surface of the double-sided tape in the thickness direction with the tip that has penetrated the release layer, thereby peeling the release layer from the other surface of the double-sided tape.

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