JP2016148018A - Adhesive tape, method for binding paper sheet, method of releasing tape, and apparatus for binding paper sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive tape which can be easily removed from an adherend, a method for binding paper sheets using the adhesive tape, and an apparatus for binding paper sheets.SOLUTION: The adhesive tape of the embodiment includes an adhesive layer which can be released from an adherend by stretching, and a protective film protecting the adhesive layer. The protective film has cuts at least a part of which extends in a first direction, and can be stretched in a second direction intersecting the first direction. Both end parts of the cuts in the first direction are disposed inside both end parts of the protective film in the first direction.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to an adhesive tape, a sheet binding method, and a sheet binding apparatus.

In recent years, an adhesive tape that can be peeled off from an adherend has been proposed. Such an adhesive tape includes an adhesive layer and a protective film that protects the adhesive layer.
Here, the adhesive layer can be peeled from the adherend by being stretched. On the other hand, the protective film is formed of a material that is difficult to stretch compared to the adhesive layer. In this case, even if it is going to stretch the adhesion layer, there is a possibility that the protective film disturbs the elongation of the adhesion layer. Therefore, when removing an adhesive tape from a to-be-adhered body, the operation | work which removes a protective film from an adhesive layer previously may be needed.

JP 2010-202843 A Japanese Unexamined Patent Publication No. 2000-191988

  The problem to be solved by the present invention is to provide an adhesive tape that can be easily removed from an adherend, a paper sheet binding method and a paper sheet binding device using the adhesive tape.

  The pressure-sensitive adhesive tape of the embodiment has a pressure-sensitive adhesive layer that can be peeled off from the adherend when stretched, and a protective film that protects the pressure-sensitive adhesive layer. The protective film has a cut having at least a portion extending in the first direction, and can be stretched in a second direction intersecting the first direction. Both end portions in the first direction of the cut are disposed inside both end portions in the first direction of the protective film.

Sectional drawing which shows the adhesive tape of 1st Embodiment. Sectional drawing which shows the use condition of the adhesive tape of 1st Embodiment. The top view which shows the adhesive tape of 1st Embodiment. Sectional drawing which follows the F4-F4 line of the adhesive tape shown in FIG. The top view which shows the state by which the protective film of 1st Embodiment was extended. The top view which shows the binding method of the paper sheets of 1st Embodiment. Sectional drawing which shows the binding method of the paper sheets of 1st Embodiment. Sectional drawing which shows one modification of the binding method of the paper sheets of 1st Embodiment. The top view which shows the method of removing paper sheets from the adhesive tape of 1st Embodiment. The top view which shows the method of removing paper sheets from the adhesive tape of 1st Embodiment. Sectional drawing which shows the 1st modification of the adhesive tape of 1st Embodiment. The top view which shows the 2nd modification of the adhesive tape of 1st Embodiment. The top view which shows the 3rd modification of the adhesive tape of 1st Embodiment. The top view which shows the 4th modification of the adhesive tape of 1st Embodiment. The top view which shows the 5th modification of the adhesive tape of 1st Embodiment. The top view which shows the 1st reference example of the adhesive tape of 1st Embodiment. The top view which shows the 2nd reference example of the adhesive tape of 1st Embodiment. The top view which shows the 3rd reference example of the adhesive tape of 1st Embodiment. The top view which shows the adhesive tape of 2nd Embodiment. The top view which shows the 1st modification of the adhesive tape of 2nd Embodiment. Sectional drawing which shows the effect | action of the 1st modification of the adhesive tape of 2nd Embodiment. The top view which shows the 2nd modification of the adhesive tape of 2nd Embodiment. The top view which shows the 3rd modification of the adhesive tape of 2nd Embodiment. The top view which shows the 1st reference example of the adhesive tape of 2nd Embodiment. The top view which shows the 2nd reference example of the adhesive tape of 2nd Embodiment. Sectional drawing which shows the adhesive tape of 3rd Embodiment. Sectional drawing which shows one modification of the adhesive tape of 3rd Embodiment. The top view which shows the adhesive tape of 4th Embodiment. The top view which shows the adhesive tape of a reference form. The top view which shows the 1st reference example of the adhesive tape of a reference form. The top view which shows the 2nd reference example of the adhesive tape of a reference form. A side view showing a binding device of an embodiment. The top view which shows the principal part of the bundle preparation part of embodiment. The side view which shows operation | movement of the binding apparatus of embodiment. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows the shift | offset | difference of the side part of the bundle of embodiment. The side view showing the 1st length and the 2nd length of an embodiment. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows operation | movement of the binding device of embodiment following FIG. The side view which shows the modification of the bundle preparation part of embodiment. The side view which shows operation | movement of the bundle preparation part of a modification.

  Hereinafter, an adhesive tape and a sheet binding method according to an embodiment will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. And the description which overlaps those structures may be abbreviate | omitted.

  Here, the X direction, the Y direction, and the Z direction are defined. The X direction and the Y direction are directions along the surface of the adhesive tape. The X direction is an example of a “first direction”. The X direction is the width direction of the adhesive tape. The Y direction is an example of a “second direction”. The Y direction is the length direction of the adhesive tape. The Y direction is a direction that intersects (for example, substantially orthogonal) with the X direction. The Z direction is the thickness direction of the adhesive tape. The Z direction is a direction that intersects (for example, substantially orthogonal) with the X direction and the Y direction.

(First embodiment)
With reference to FIGS. 1 to 10, the adhesive tape 1 and the sheet binding method of the first embodiment will be described. FIG. 1 is a cross-sectional view illustrating a configuration example of the adhesive tape 1. As shown in FIG. 1, the adhesive tape 1 has an adhesive layer 11, a protective film (base material) 12, and a release film 13.
In addition, in this application, the film peeled in order to expose an adhesive surface at the time of use of the adhesive tape 1 is called a "peeling film" for convenience of explanation. On the other hand, a film that protects the adhesive layer 11 even when the adhesive tape 1 is used is referred to as a “protective film”. The names “peeling film” and “protective film” are given for convenience in order to distinguish the two.
Therefore, these films 12 and 13 may be referred to by different names.
In addition, the “film” referred to in the present application is a name given for distinction from a paper sheet described later. For this reason, the term “film” broadly means a sheet-like member, and the material is not limited to a synthetic resin material. The “film” in the present application may be referred to as a “sheet member”.

First, the adhesive layer 11 will be described.
FIG. 2 is a cross-sectional view showing the usage state of the adhesive tape 1. As shown in FIG. 2, the adhesive tape 1 is used by attaching the adhesive layer 11 to the adherend A after peeling off the release film 13. More specifically, the adhesive layer 11 has an adhesive surface (attachment surface) 11s. The adhesive surface 11s is adhered to the adherend A. Thereby, the adhesion layer 11 is bonded to the adherend A.

  Here, the adherend A is not particularly limited. The adherend A widely corresponds to various members such as paper, wood, cloth, synthetic resin, and metal. For example, the adherend A is a paper sheet. As used herein, “paper sheets” widely means sheet-like members. For example, the paper sheet is a sheet-like recording medium (hereinafter referred to as a sheet) on which an image is printed (or printed). For example, the paper sheet is a sheet made of paper or synthetic resin.

  On the other hand, the adhesive layer 11 has a property of being peelable from the adherend A by being stretched. For example, the adhesive layer 11 can be peeled off from the adherend A by being stretched in a direction substantially parallel to the surface (attachment surface) of the adherend A. For example, the adhesive layer 11 can be peeled from the adherend A by being stretched in the Y direction in FIG.

  The material of the adhesion layer 11 is not specifically limited. For example, the adhesive layer 11 is made of Kyogiken Chemical Co., Ltd.'s Mayclean gel (registered trademark). The adhesive layer 11 may be formed of Renesas gel manufactured by Kyori Giken Chemical Co., Ltd. Further, the adhesive layer 11 may be formed of the same material as the 3M Company's COMMAND (registered trademark) tab.

  The thickness of the adhesion layer 11 is not specifically limited. For example, the thickness of the adhesive layer 11 is 10 μm to 500 μm. In a specific example, the thickness of the adhesive layer 11 is 300 μm.

Next, the protective film 12 will be described.
As shown in FIG. 1, the protective film 12 is provided on one side of the adhesive layer 11 and protects the adhesive layer 11. The protective film 12 is overlaid on the adhesive layer 11. Thereby, the protective film 12 covers the adhesive layer 11. Note that “the protective film 12 is provided on one side of the adhesive layer 11 (overlaid or covered)” in the present application is not limited to the case where the protective film 12 directly contacts the adhesive layer 11. “The protective film 12 is provided on one side of the adhesive layer 11 (overlaid or covered)” includes a case where another member is interposed between the protective film 12 and the adhesive layer 11. In addition, the example in case another member interposes between the protective film 12 and the adhesion layer 11 is mentioned later as 3rd Embodiment.

The material of the protective film 12 is not particularly limited. For example, the protective film 12 is a synthetic resin sheet. In a specific example, the protective film 12 is formed of PET (Poly Ethylene Terephthalate). The protective film 12 may be formed of a paper material or a cloth material (for example, a non-woven fabric).
The thickness of the protective film 12 is not particularly limited. For example, the thickness of the protective film 12 is 3 μm to 100 μm. In a specific example, the thickness of the protective film 12 is 15 μm.

  FIG. 3 is a plan view of the protective film 12. As shown in FIG. 3, the protective film 12 has a first end (first side, first edge) 12a and a second end (second side, second edge) 12b. The first end 12 a and the second end 12 b are both ends of the protective film 12 in the X direction.

  Moreover, the protective film 12 has the 3rd end part 12c and the 4th end part 12d. The third end portion 12c and the fourth end portion 12d are both end portions of the protective film 12 in the Y direction. Here, a center line C is defined. The center line C crosses the protective film 12 in the Y direction. The center line C passes through the center of the protective film 12 in the X direction.

  Next, the break provided in the protective film 12 will be described.

  In the present application, for convenience of explanation, a cut that penetrates the protective film 12 in the thickness direction (Z direction) of the protective film 12 is referred to as a “slit”. On the other hand, a cut that does not penetrate the protective film 12 in the thickness direction of the protective film 12 is referred to as a “groove”. In this embodiment, the protective film 12 is provided with a plurality of slits.

  The “slit” as used in the present application broadly means a through notch provided in the protective film 12. That is, the “slit” in the present application is not limited to a slit having a gap. The “slit” as used in the present application may be a slit having no gap. The “slit having a gap” means that a spatial gap (hole) is formed at a portion where the slit is provided. The “slit without a gap” means that a spatial gap is not substantially formed at a site where the slit is provided (only a cut surface exists). That is, the “slit without a gap” means that two surfaces located on both sides of the slit contact each other so as to close the slit.

  As shown in FIG. 3, in this embodiment, the protective film 12 has a plurality of center slits 21 and a plurality of end slits 22. The central slit 21 is an example of each of “first cut” and “first slit”. The end slit 22 is an example of each of “second cut” and “second slit”. Here, the names “center slit” and “end slit” are given for convenience in order to distinguish the two. Therefore, these names do not particularly limit the shape and configuration of these slits.

  At least a part of the central slit 21 extends in the X direction. For example, the central slit 21 extends linearly in the X direction over its entire length. The central slit 21 has a first end 21a and a second end 21b. The first end 21 a and the second end 21 b are both ends of the central slit 21 in the X direction. The first end portion 21 a and the second end portion 21 b of the central slit 21 are disposed on the inner side than both end portions 12 a and 12 b in the X direction of the protective film 12. That is, the central slit 21 is separated from both end portions 12 a and 12 b in the X direction of the protective film 12. Both ends 21 a and 21 b in the X direction of the central slit 21 do not reach both ends 12 a and 12 b in the X direction of the protective film 12.

Thereby, the protective film 12 has the 1st connection part (1st non-cutting part) 31 and the 2nd connection part (2nd non-cutting part) 32. As shown in FIG.
The first connecting portion 31 is located between the first end 21 a of the central slit 21 and the first end 12 a of the protective film 12. In the 1st connection part 31, the protective film 12 is continuing in the Y direction.
The second connection part 32 is located between the second end part 21 b of the central slit 21 and the second end part 12 b of the protective film 12. In the 2nd connection part 32, the protective film 12 is continuing in the Y direction.

  Similarly, at least a part of the end slit 22 extends in the X direction. For example, the end slit 22 extends linearly in the X direction over its entire length. However, the end slit 22 reaches one of the first end 12 a and the second end 12 b of the protective film 12.

  More specifically, the plurality of end slits 22 include an end slit 22A belonging to the first group G1 and an end slit 22B belonging to the second group G2.

  The end slit 22 </ b> A of the first group G <b> 1 is disposed between the first end 12 a of the protective film 12 and the center line C. The end slit 22 </ b> A reaches the first end 12 a of the protective film 12. However, the end slit 22A does not reach the center of the protective film 12 in the X direction.

  The end slit 22 </ b> B of the second group G <b> 2 is disposed between the second end 12 b of the protective film 12 and the center line C. The end slit 22B reaches the second end 12b of the protective film 12. However, the end slit 22B does not reach the center of the protective film 12 in the X direction.

  The end slit 22A and the end slit 22B are located on substantially the same straight line in the X direction. The end slit 22A and the end slit 22B have substantially the same shape. For example, the end slit 22A and the end slit 22B have substantially the same length.

  The end slit 22A and the end slit 22B are separated from each other in the X direction. Thereby, the protective film 12 has the 3rd connection part (3rd non-cut | disconnecting part) 33. FIG. The third connection portion 33 is located between the end slit 22A and the end slit 22B. In the 3rd connection part 33, the protective film 12 is continuing in the Y direction.

  In the present embodiment, the plurality of central slits 21 and the plurality of end slits 22 are alternately arranged in the Y direction. The end slit 22 includes a portion R1 aligned with the central slit 21 in the Y direction.

Next, the shape of the slits 21 and 22 in the thickness direction of the adhesive tape 1 will be described.
FIG. 4 is a cross-sectional view taken along line F4-F4 of the adhesive tape 1 shown in FIG. As shown in FIG. 4, the protective film 12 has a first surface 41 and a second surface 42. The first surface 41 is located on the adhesive layer 11 side. The second surface 42 is located on the opposite side to the first surface 41. The second surface 42 forms a part of the outer surface of the adhesive tape 1.

  In the present embodiment, the central slit 21 and the end slit 22 penetrate the protective film 12 in the thickness direction (Z direction) of the protective film 12. That is, the central slit 21 and the end slit 22 are formed in the protective film 12 from the second surface 42 side. The central slit 21 and the end slit 22 reach the first surface 41. The central slit 21 and the end slit 22 are formed by, for example, a laser cutter.

  The central slit 21 and the end slit 22 are formed after the protective film 12 and the adhesive layer 11 are integrated together. In this case, the tips of the central slit 21 and the end slit 22 may enter the adhesive layer 11. The central slit 21 and the end slit 22 may be formed before the protective film 12 and the adhesive layer 11 are integrated together.

  FIG. 5 shows the state in which the protective film 12 is stretched. As shown in FIG. 5, the protective film 12 of this embodiment can be stretched in the Y direction by having the central slit 21 and the end slit 22 described above. Specifically, the protective film 12 can be stretched together with the adhesive layer 11 when the adhesive layer 11 is stretched. When the adhesive layer 11 is stretched in the Y direction, the protective film 12 can be stretched in the Y direction by increasing the width of the central slit 21 and the end slit 22 in the Y direction.

More specifically, the central slit 21 opens greatly near the center line C when the adhesive layer 11 is stretched in the Y direction. However, the central slit 21 does not open so much near the end portions 12a and 12b in the X direction of the protective film 12. In other words, the central slit 21 of the protective film 12 is opened larger than the end portions 12a and 12b in the X direction of the protective film 12 near the center line C.
On the other hand, when the adhesive layer 11 is stretched in the Y direction, the end slit 22 opens greatly near the end portions 12 a and 12 b in the X direction of the protective film 12. However, the end slit 22 does not open much near the center line C. In other words, the end slit 22 of the protective film 12 opens larger than the vicinity of the center line C at the end portions 12a and 12b in the X direction.
As the center slits 21 and the end slits 22 are alternately arranged as described above, the protective film 12 is deformed into a chain shape as a whole and extends in the Y direction.

  Here, for example, the protective film 12 is integral with the adhesive layer 11 until the adhesive layer 11 peels from the adherend A. The protective film 12 may be peeled from the adhesive layer 11 after the adhesive film 11 is stretched by a certain amount together with the adhesive layer 11 and before the adhesive layer 11 is peeled from the adherend A.

  In another aspect, the protective film 12 may be stretched together with the adhesive layer 11 by tearing a part of the protective film 12. For example, as shown in FIG. 5, stress concentration occurs in the first to third connection portions 31, 32, and 33 of the protective film 12 when the protective film 12 is stretched. When the protective film 12 is stretched together with the adhesive layer 11, some or all of the connection portions 31, 32, 33 may be torn off, so that the protective film 12 may be stretched together with the adhesive layer 11.

Next, the release film 13 will be described.
As shown in FIG. 1, the release film 13 is located on the side opposite to the protective film 12 with respect to the adhesive layer 11. The release film 13 covers the adhesive surface 11 s of the adhesive layer 11 before using the adhesive tape 1. The release film 13 is removed from the adhesive layer 11 when the adhesive tape 1 is used. Thereby, the adhesive surface 11s is exposed to the outside of the adhesive tape 1. As a result, the adhesive layer 11 can be adhered to the adherend A. In addition, the peeling film 13 may be abbreviate | omitted when the adhesive tape 1 is provided in roll shape.

The material of the release film 13 is not particularly limited. For example, the release film 13 is a sheet made of paper or synthetic resin.
The thickness of the release film 13 is not particularly limited. For example, the thickness of the release film 13 is 50 μm to 200 μm. In a specific example, the thickness of the release film 13 is 100 μm.

Next, an example of a paper sheet binding method using the adhesive tape 1 will be described.
FIG. 6 is a plan view showing a bundle 50 of paper sheets bound by the adhesive tape 1. In the binding method of the present embodiment, first, a plurality of paper sheets 51 are stacked on each other. As a result, a bundle 50 of paper sheets 51 is produced.

Here, the bundle 50 of paper sheets will be described in detail.
FIG. 7 is a cross-sectional view showing a bundle 50 of paper sheets. As shown in FIG. 7, the bundle 50 of paper sheets includes a first paper sheet 51A, a second paper sheet 51B, and a third paper sheet 51C.

  The first paper sheet 51 </ b> A is located on the forefront (the uppermost surface in FIG. 7) among the plurality of paper sheets 51. The first paper sheet 51A forms a cover of a bundle 50 of paper sheets.

  The second paper sheet 51B is located on the opposite side to the first paper sheet 51A. That is, the second paper sheet 51 </ b> B is located on the rearmost surface (the lowermost surface in FIG. 7) among the plurality of paper sheets 51. The second paper sheet 51B forms the back cover of the bundle 50 of paper sheets.

The third paper sheet 51C is located between the first paper sheet 51A and the second paper sheet 51B among the plurality of paper sheets 51. The third paper sheet 51 </ b> C forms an intermediate page of the bundle 50 of paper sheets. The third sheet 51C may be a single sheet or a plurality of sheets. The third paper sheet 51C may be omitted.
That is, the bundle 50 of paper sheets may be formed only by the first paper sheets 51A and the second paper sheets 51B.

  From another viewpoint, the bundle 50 of paper sheets has a first surface 50a, a second surface 50b, and a side portion 50c. The first surface 50a is formed by the first paper sheet 51A. The second surface 50b is formed by the second paper sheet 51B. The second surface 50b is located on the opposite side to the first surface 50a. The side part 50c is located between the first surface 50a and the second surface 50b. The side portion 50 c is formed by the side surfaces of the plurality of paper sheets 51. For example, when the bundle 50 of paper sheets has the third paper sheet 51C, the side portion 50c is formed by the side surfaces of the first paper sheet 51A, the second paper sheet 51B, and the third paper sheet 51C. The When the bundle 50 of paper sheets does not have the third paper sheet 51C, the side portion 50c is formed by the side surfaces of the first paper sheet 51A and the second paper sheet 51B.

  Here, as shown in FIGS. 6 and 7, the bundle 50 of paper sheets has one edge 61. As shown in FIG. 7, in the binding method of the present embodiment, the plurality of paper sheets 51 are slightly shifted from each other at the edge 61.

  In this case, the side portion 50c of the bundle of paper sheets 50 is shifted with respect to the side surfaces of the plurality of paper sheets 51 and the adjacent paper sheets 51 so as not to overlap the adjacent paper sheets 51. And the surface of the leaf 51. That is, the side part 50c of the bundle 50 of paper sheets is formed in a step shape as shown in FIG. In this case, the surface area which contacts the adhesion layer 11 of the side part 50c increases compared with the case where the side part 50c is formed in linear form.

Next, a method for attaching the adhesive tape 1 to the bundle 50 of paper sheets will be described.
As shown in FIG. 6, in the binding method of the present embodiment, the Y direction of the adhesive tape 1 intersects the edge 61 a of the edge 61 of the bundle 50 of paper sheets. For example, the Y direction of the adhesive tape 1 is substantially orthogonal to the edge 61 a of the edge 61 of the bundle 50 of paper sheets.

  Then, at the edge 61 of the bundle 50 of paper sheets, the first surface 50 a, the second surface 50 b, and the side portion 50 c of the bundle 50 are fastened with the adhesive tape 1. That is, the adhesive tape 1 is bonded to each of the first surface 50a, the second surface 50b, and the side portion 50c of the bundle 50. In other words, the edge 61 of the bundle 50 of paper sheets is wrapped with the adhesive tape 1 from three directions. As a result, the plurality of paper sheets 51 are bound by the adhesive tape 1.

  As described above, the adhesive tape 1 is bonded to the edge 61 of the bundle 50 of paper sheets. In the present embodiment, the plurality of paper sheets 51 are shifted from each other at the edge 61 of the bundle 50 of paper sheets. The adhesive tape 1 is affixed to the side part 50c of the bundle 50 of the paper sheets formed in the step shape. Thereby, in the binding method of this embodiment, the adhesion area of the 3rd paper sheets 51C and the adhesive tape 1 can be enlarged.

  FIG. 8 shows one modification of the sheet binding method of the present embodiment. As shown in FIG. 8, the side part 50c of the bundle 50 of paper sheets may be arranged linearly. That is, the plurality of paper sheets 51 may not be shifted from each other at the edge 61 of the bundle 50 of paper sheets. Even in such a configuration, a plurality of paper sheets 51 can be bound by the adhesive tape 1.

Next, a method for removing the adhesive tape 1 will be described.
First, the third paper sheet 51 </ b> C is removed from the adhesive tape 1.
FIG. 9 shows a method of removing the third paper sheet 51 </ b> C from the adhesive tape 1. As shown in FIG. 9, first, the first paper sheet 51A and the second paper sheet 51B are largely opened. Then, the third paper sheet 51C is removed from between the first paper sheet 51A and the second paper sheet 51B. Here, the adhesive area between the third paper sheet 51C and the adhesive tape 1 is smaller than the adhesive area between the first paper sheet 51A or the second paper sheet 51B and the adhesive tape 1. Therefore, if the third paper sheet 51C is pulled slightly strongly in the direction away from the adhesive tape 1 (for example, the Y direction in FIG. 9 or the direction crossing the X direction and the Y direction), the third paper sheet is removed from the adhesive tape 1. 51C can be easily removed.
Before removing the third paper sheet 51C from the adhesive tape 1 (or simultaneously with the removal operation), the first paper sheet 51A and the second paper sheet 51B are pulled so as to stretch the adhesive tape 1 in the Y direction. May be. When the adhesive tape 1 is stretched in the Y direction, the adhesive layer 11 is stretched, and the contact area between the third paper sheet 51C and the adhesive layer 11 is reduced. Thereby, the third paper sheet 51C can be further easily removed from the adhesive tape 1.

Next, the first paper sheet 51 </ b> A and the second paper sheet 51 </ b> B are removed from the adhesive tape 1.
FIG. 10 shows a method of removing the first paper sheet 51 </ b> A and the second paper sheet 51 </ b> B from the adhesive tape 1. In FIG. 10, for convenience of explanation, one adhesive tape 1 is schematically enlarged and shown. As shown in FIG. 10, with the first paper sheet 51A and the second paper sheet 51B open, the adhesive tape 1 is pressed with a finger. Then, the first paper sheet 51 </ b> A and the second paper sheet 51 </ b> B are pulled to the outside simultaneously or sequentially with respect to the adhesive tape 1. Thereby, the adhesion layer 11 is extended in the Y direction. At this time, in the pressure-sensitive adhesive tape 1 of the present embodiment, the pressure-sensitive adhesive layer 11 and the protective film 12 are stretched together in the Y direction.

  When the adhesive layer 11 is stretched by a certain amount or more with respect to the first paper sheet 51A and the second paper sheet 51B, the adhesive layer 11 peels from the first paper sheet 51A and the second paper sheet 51B. Thereby, the first paper sheet 51 </ b> A and the second paper sheet 51 </ b> B are removed from the adhesive tape 1. More specifically, when the adhesive layer 11 is stretched, the adhesive area between the adhesive layer 11 and the first paper sheet 51A and the second paper sheet 51B gradually decreases. Thereby, the adhesion layer 11 can be peeled from the first paper sheet 51A and the second paper sheet 51B without damaging the surfaces of the first paper sheet 51A and the second paper sheet 51B.

According to the above configuration, it is possible to provide an adhesive tape 1 that can be easily peeled off from the adherend A and a method for binding paper sheets using the adhesive tape 1.
Here, for the sake of comparison, consider a case where the protective film is formed of a material that is difficult to stretch compared to the adhesive layer. In this case, even if it is going to stretch the adhesion layer, there is a possibility that the protective film disturbs the elongation of the adhesion layer. Therefore, when removing an adhesive tape from a to-be-adhered body, the operation | work which removes a protective film from an adhesive layer previously may be needed. The operation of removing the protective film from the adhesive layer first tends to be complicated. Therefore, the above adhesive tape has room for improvement from the viewpoint of convenience.

  Then, the adhesive tape 1 of this embodiment is provided with the adhesion layer 11 which can be peeled from the to-be-adhered body A by being extended, and the protective film 12 which protects the adhesion layer 11. FIG. The protective film 12 has a central slit 21 at least partially extending in the X direction. The protective film 12 can be stretched in the Y direction that intersects the X direction.

  According to such a configuration, when the adhesive layer 11 is stretched and peeled from the adherend A, the adhesive layer 11 and the protective film 12 can be stretched together. Thereby, it is not necessary to remove the protective film 12 from the adhesive layer 11 first. That is, a complicated operation of removing the protective film 12 from the adhesive layer 11 first can be omitted. Thereby, user convenience can be improved.

  The adhesive tape 1 may be expected to have a certain strength (rigidity) in the Y direction. For example, if the adhesive tape 1 bound with the paper sheets 51 is unexpectedly stretched, the paper sheets 51 may fall apart.

  Here, when the slit which reaches either one of the both ends 12a and 12b of the X direction of the protective film 12 is provided, the intensity | strength of the Y direction of the protective film 12 will fall easily. The reason is that when a slit reaching the end of the protective film 12 is provided, the protective film 12 receives a force in the Y direction only in a region located on one side of the slit in the X direction. For this reason, the force in the Y direction tends to concentrate on a specific region of the protective film 12. For this reason, the intensity | strength of the Y direction of the protective film 12 tends to fall.

  On the other hand, in the present embodiment, both end portions 21 a and 21 b in the X direction of the central slit 21 are disposed inside both end portions 12 a and 12 b in the X direction of the protective film 12. According to such a structure, the protective film 12 can receive the force of a Y direction in the some area | region (1st and 2nd connection parts 31 and 32) located in the both sides of a slit in a X direction. For this reason, it is difficult for the force in the Y direction to concentrate on a specific region of the protective film 12. For this reason, the intensity | strength of the Y direction of the protective film 12 cannot fall easily. Thereby, the adhesive tape 1 of this embodiment can ensure fixed intensity | strength in addition to the ease of extending | stretching in a Y direction. Even in this case, when the adhesive tape 1 is removed, the adhesive tape 1 can be reliably stretched by pulling the adhesive tape 1 strongly and tearing part or all of the connecting portions 31 and 32.

In the present embodiment, the protective film 12 has an end slit 22 in addition to the central slit 21. At least a part of the end slit 22 extends in the X direction. The end slit 22 reaches either one of both end portions 12 a and 12 b in the X direction of the protective film 12. The end slit 22 includes a portion R1 aligned with the central slit 21 in the Y direction.
According to such a structure, the area | region between the center slit 21 and the edge part slit 22 deform | transforms diagonally with respect to a X direction, when the protective film 12 is extended (for example, refer FIG. 5). For this reason, according to the said structure, compared with the case where only the center slit 21 is provided or the case where only the edge part slit 22 is provided, the protective film 12 becomes still easier to extend in a Y direction. Further, by having both the central slit 21 and the end slit 22, it is possible to provide the pressure-sensitive adhesive tape 1 having both strength in the Y direction and easiness of elongation.

Here, as a comparative example, a case where a plurality of central slits 21 are continuously arranged in the Y direction in the protective film 12 is considered. In this case, in order to stretch the protective film 12 greatly, it is necessary to pull the protective film 12 strongly and to tear off part or all of the connection portions 31 and 32.
As another comparative example, a case where a plurality of end slits 22 are continuously arranged in the Y direction in the protective film 12 will be considered. Also in this case, in order to stretch the protective film 12 greatly, it is necessary to pull the protective film 12 strongly and to tear off part or all of the connection portion 33.

  On the other hand, the protective film 12 of the present embodiment has a plurality of central slits 21 and end slits 22. The plurality of central slits 21 and the plurality of end slits 22 are alternately arranged in the Y direction. According to such a configuration, the protective film 12 can extend in a chain shape as described above by opening the center slits 21 and the end slits 22 that are alternately arranged. For this reason, even if it does not tear off the connection parts 31, 32, and 33, the substantially whole of the protective film 12 extends uniformly. For this reason, the protective film 12 can be greatly stretched with a relatively weak force compared to the above two comparative examples. This enhances user convenience.

In recent years, in order to promote the reuse (reuse and recycling) of paper sheets, there has been a demand for a paper sheet binding method that does not use metal staples.
Therefore, in the paper sheet binding method of the present embodiment, a plurality of paper sheets 51 are first stacked to form a bundle 50 of paper sheets. And the Y direction of the adhesive tape 1 is made to cross | intersect the edge 61a of the one edge part 61 of the bundle 50 of paper sheets. Then, at the edge 61 of the bundle 50 of paper sheets, the first surface 50 a, the second surface 50 b, and the side portion 50 c of the bundle 50 are fastened with the adhesive tape 1. According to such a method, a plurality of paper sheets 51 can be easily bound without using metal staples.
Furthermore, the adhesive tape 1 can be easily removed from the paper sheet 51 without damaging the paper sheet 51. For this reason, the reuse of the paper sheets 51 can be promoted.

  Here, the adhesive strength between the third paper sheet 51C and the adhesive tape 1 is inevitably smaller than the adhesive strength between the first paper sheet 51A or the second paper sheet 51B and the adhesive tape 1. Prone.

  Therefore, in the binding method of this embodiment, the plurality of paper sheets 51 are shifted from each other at the edge 61 of the bundle 50 of paper sheets. Thereby, the adhesion area of each 3rd paper sheet 51C and the adhesive tape 1 can be increased. Thereby, the intermediate page of the bundle 50 of paper sheets can be firmly held by the adhesive tape 1.

Next, the 1st modification of the adhesive tape 1 of this embodiment is demonstrated.
In this modification, the depth of the cut provided in the protective film 12 is different from that of the first embodiment. The remaining configuration of the present modification is the same as that of the first embodiment. Therefore, description of the same part as 1st Embodiment is abbreviate | omitted.

  As described above, in the present application, for convenience of explanation, a cut that does not penetrate the protective film 12 in the thickness direction of the protective film 12 is referred to as a “groove”. This modification is an example in which a plurality of grooves are provided in the protective film 12.

  The “groove” in the present application broadly means notches that do not penetrate in the protective film 12. That is, the “groove” referred to in the present application is not limited to a groove having a gap. The “groove” in the present application may be a groove having no void. The “groove having a gap” means that a spatial gap (concave portion) is formed at a site where the groove is provided. The “grooves having no gap” are those in which a spatial gap is not substantially formed at the site where the groove is provided (only a cut surface exists). That is, “a groove having no gap” means that two surfaces located on both sides of the groove are in contact with each other so as to close the groove.

  FIG. 11 is an enlarged cross-sectional view of a part of the adhesive tape 1 of the first modification. As shown in FIG. 11, the pressure-sensitive adhesive tape 1 of this modification has a plurality of central grooves 65 and a plurality of end grooves 66. The central groove 65 is an example of each of the “first cut” and the “first groove”. The end groove 66 is an example of each of a “second cut” and a “second groove”. Here, the names “central groove” and “end groove” are given for convenience in order to distinguish the two. Therefore, these names do not particularly limit the shape and configuration of these grooves.

The central groove 65 differs in depth from the central slit 21 of the first embodiment. The central groove 65 is substantially the same as the central slit 21 in the arrangement position and the planar shape.
Similarly, the end groove 66 is different in depth from the end slit 22 of the first embodiment.
The end groove 66 is substantially the same as the end slit 22 in the arrangement position and the planar shape.

  As shown in FIG. 11, the central groove 65 and the end groove 66 are formed in the protective film 12 from the second surface 42 side. The central groove 65 and the end groove 66 do not reach the first surface 41 of the protective film 12. That is, the central groove 65 and the end groove 66 are formed only halfway through the thickness of the protective film 12.

  For this reason, in the boundary part of the adhesion layer 11 and the protective film 12, the protective film 12 is continued in the Y direction beyond the some groove | channels 65 and 66. FIG. For example, the protective film 12 is continuous over the entire length in the Y direction.

  In other words, the protective film 12 includes the fourth connecting portion (fourth non-cutting portion) 34 between the central groove 65 and the end groove 66 and the adhesive layer 11. In the 4th connection part 34, the protective film 12 continues in a Y direction. The fourth connecting portion 34 may be torn off in the same manner as the first to third connecting portions 31, 32, 33 when the adhesive layer 11 is stretched.

  According to such a configuration, there is no possibility that the adhesive layer 11 protrudes to the second surface 42 side of the protective film 12 through the slit provided in the protective film 12. For this reason, it is suppressed that the surface of the adhesive tape 1 is sticky. For this reason, the convenience of the user can be further enhanced. In all the embodiments, modifications, reference examples, and reference forms described below, each slit may be a groove as in this modification.

  Next, some modified examples and reference examples of the adhesive tape 1 of the first embodiment will be described. These modified examples and reference examples are different from the first embodiment in the types or combinations of slits provided in the protective film 12. The other configurations of these modified examples and reference examples are the same as the configurations of the first embodiment. Therefore, description of the same part as 1st Embodiment is abbreviate | omitted.

  FIG. 12 is a plan view showing a pressure-sensitive adhesive tape 1 according to a second modification. As shown in FIG. 12, the protective film 12 of this modification has a plurality of central slits 21. The plurality of central slits 21 are arranged in the Y direction. Note that only one central slit 21 may be provided.

  Even in such a configuration, the protective film 12 can be stretched together with the adhesive layer 11 by the first and second connection portions 31 and 32 being torn off. Moreover, according to such a structure, it is easy to ensure the intensity | strength of the Y direction of the protective film 12 similarly to 1st Embodiment.

  FIG. 13 is a plan view showing a pressure-sensitive adhesive tape 1 according to a third modification. As shown in FIG. 13, the protective film 12 of this modification has one central slit 21 and a plurality of end slits 71. The central slit 21 is disposed between the plurality of end slits 71 in the Y direction.

  Here, the name “end slit” is given for convenience in order to distinguish the slit 71 from other slits. Therefore, this name does not particularly limit the shape and configuration of the slit 71. The end slit 71 is an example of each of a “second cut” and a “second slit”.

  At least a part of the end slit 71 extends in the X direction. For example, the end slit 71 extends linearly in the X direction over its entire length. The end slit 71 reaches one of the first end 12 a and the second end 12 b in the X direction of the protective film 12.

  The plurality of end slits 71 include an end slit 71A belonging to the first group G1 and an end slit 71B belonging to the second group G2. The end slit 71A of the first group G1 reaches the first end 12a of the protective film 12. The end slit 71B of the second group G2 reaches the second end 12b of the protective film 12. The plurality of end slits 71A and the plurality of end slits 71B are alternately arranged in the Y direction. The end slits 71A and 71B each have a length that is at least half the width of the protective film 12 in the X direction. The end slit 71B includes a portion R2 aligned with the end slit 71A in the Y direction. Such end slits 71A and 71b can be opened relatively large in the Y direction. For this reason, the protective film 12 is easily stretched in the Y direction.

  According to such a configuration, the protective film 12 is provided with the end slits 71, so that the protective film 12 is further easily stretched in the Y direction. Moreover, the protective film 12 becomes easy to ensure the intensity | strength of the Y direction of the protective film 12 by providing the center slit 21. FIG.

FIG. 14 is a plan view showing a pressure-sensitive adhesive tape 1 according to a fourth modification. As shown in FIG. 14, the protective film 12 of this modification has a plurality of central slits 21 and a plurality of end slits 71.
The plurality of central slits 21 are disposed between the plurality of end slits 71 in the Y direction. The plurality of central slits 21 are arranged next to each other in the Y direction.

  According to such a structure, the 1st and 2nd connection parts 31 and 32 can be ensured large compared with the 3rd modification. For this reason, it becomes easier to ensure the strength of the protective film 12 in the Y direction as compared with the third modification.

FIG. 15 is a plan view showing a pressure-sensitive adhesive tape 1 according to a fifth modification. As shown in FIG. 15, the protective film 12 of the present modification has one broken line slit 73 and a plurality of end slits 71. The broken line slit 73 is disposed between the plurality of end slits 71 in the Y direction.
Here, the name “broken line slit” is given for convenience in order to distinguish the slit 73 from other slits. Therefore, this name does not particularly limit the shape and configuration of the slit 73. The broken line slit 73 is an example of each of the “first cut” and the “first slit”.

  At least a part of the broken line slit 73 extends in the X direction. The broken line slit 73 is formed in a broken line shape. That is, the broken line slit 73 includes a plurality of slit pieces 73a. The plurality of slit pieces 73a are separated from each other in the X direction. The protective film 12 may have a plurality of broken line slits 73.

  According to such a configuration, the broken-line slit 73 is divided into a plurality of slit pieces 73a, so that it is easier to secure the strength of the protective film 12 in the Y direction.

  FIG. 16 is a plan view showing the adhesive tape 1 of the first reference example. As shown in FIG. 16, the protective film 12 of this reference example has a plurality of end slits 71.

  FIG. 17 is a plan view showing the adhesive tape 1 of the second reference example. As shown in FIG. 17, the protective film 12 of this reference example has a plurality of full width slits 75. At least a part of the full width slit 75 extends in the X direction. For example, the full width slit 75 extends linearly in the X direction over its entire length. The full width slit 75 of this modification reaches both the end portions 12 a and 12 b in the X direction of the protective film 12. That is, the full width slit 75 extends over the full width of the protective film 12 in the X direction. The plurality of full width slits 75 are arranged in the Y direction. When such a full width slit 75 is provided, the adhesive tape 1 can be further easily stretched in the Y direction. Note that only one full width slit 75 may be provided.

Here, depending on the material forming the protective film 12, the protective film 12 may not be easily bent in the Z direction.
On the other hand, when the full width slit 75 is provided in the protective film 12, the protective film 12 is easily bent in the Z direction at the position where the full width slit 75 is provided. For this reason, according to the said structure, when attaching the adhesive tape 1 to the corner | angular part etc. of the to-be-adhered body A, the followable | trackability of the adhesive tape 1 with respect to a corner | angular part can be improved. For this reason, the adhesive strength of the adhesive tape 1 to the adherend A can be increased. Further, when the adhesive tape 1 can be deformed following the corners of the adherend A, the appearance of the adhesive tape 1 during use is improved.

  The protective film 12 may have a full width groove 76 instead of a part or all of the plurality of full width slits 75. The full width groove 76 has a substantially same planar shape as the full width slit 75 and is a notch that does not reach the first surface 41 of the protective film 12. That is, the full width groove 76 is a groove reaching both the end portions 12 a and 12 b in the X direction of the protective film 12.

Here, when the full width slit 75 is provided in the protective film 12, the protective film 12 is divided into a plurality of pieces in the Y direction.
On the other hand, when the full width groove 76 is provided instead of the full width slit 75, the protective film 12 is not divided into a plurality of pieces in the Y direction. For this reason, according to the adhesive tape 1 provided with the full width groove | channel 76, it becomes easy to ensure the intensity | strength of the Y direction of the protective film 12, improving the followable | trackability of the adhesive tape 1 with respect to the corner | angular part of the to-be-adhered body A.

FIG. 18 is a plan view showing the adhesive tape 1 of the third reference example. As shown in FIG. 18, the protective film 12 of this reference example has a full width slit 75 and a plurality of end slits 71. The full width slit 75 is arranged between the plurality of end slits 71 in the Y direction.
According to such a structure, the followable | trackability of the adhesive tape 1 with respect to the corner | angular part of the to-be-adhered body A can be improved. The protective film 12 may have a full width groove 76 instead of the full width slit 75.

  Even when the adhesive layer 11 is stretched by the adhesive tapes 1 of the first to fifth modifications and the first to third reference examples of the first embodiment as described above, the adhesive layer 11 and the protective film 12 Can be stretched together.

(Second Embodiment)
Next, the adhesive tape 1 of 2nd Embodiment is demonstrated.
The present embodiment is different from the first embodiment in that the protective film 12 has a wide interval between some slits. In addition, the other structure of this embodiment is the same as the structure of 1st Embodiment. Therefore, description of the same part as 1st Embodiment is abbreviate | omitted.

  FIG. 19 is a plan view showing the adhesive tape 1 according to the second embodiment. As shown in FIG. 19, the protective film 12 of the present embodiment has a first region 81, a second region 82, and a third region 83. The first area 81 is an area bonded to the first paper sheet 51A. The second area 82 is an area bonded to the second paper sheet 51B. The third region 83 is located between the first region 81 and the second region 82. The third area 83 is an area bonded to the side portion 50c of the bundle 50 of paper sheets. For example, the first area 83 is an area bonded to the third paper sheet 51C.

  The first region 81 of the protective film 12 has a plurality of central slits 21 and end slits 22, respectively, as in the first embodiment. Similarly, the second region 82 of the protective film 12 has a plurality of central slits 21 and end slits 22, respectively, as in the first embodiment. On the other hand, no slit is provided in the third region 83 of the protective film 12.

  According to such a structure, the adhesive strength of the adhesive tape 1 with respect to the bundle 50 of paper sheets can be made high. That is, the third region 83 of the protective film 12 is a region that is bonded to the side portion 50c of the bundle 50 of paper sheets. In the third region 83, compared to the first region 81 or the second region 82, the adhesion area to each paper sheet 51 tends to be small.

  Here, when the protective film 12 is provided with a slit, when the adhesive tape 1 is attached to the bundle 50 of paper sheets, it may be assumed that the adhesive tape 1 is attached in an unintentionally stretched state. If the adhesive tape 1 is attached in a stretched state, the adhesive force per unit area of the adhesive layer 11 may be reduced.

  Therefore, in the present embodiment, no slit is provided in the third region 83 of the protective film 12. According to such a configuration, the third region 83 is less likely to be unexpectedly stretched than the first region 81 and the second region 82 when the adhesive tape 1 is attached to the bundle 50 of paper sheets. For this reason, the third region 83 of the protective film 12 is easily attached to the side portion 50c of the bundle 50 of paper sheets while maintaining a relatively high adhesive force. For this reason, the adhesive strength of the 3rd field 83 to side part 50c of bundle 50 of paper sheets can be made high. Thereby, the adhesive strength of the adhesive tape 1 with respect to the bundle 50 of paper sheets can be made high.

  Next, some modifications and reference examples of the adhesive tape 1 of the second embodiment will be described. In these modified examples and reference examples, the type or combination of slits provided in the protective film 12 is different from the configuration of the second embodiment. The other configurations of these modified examples and reference examples are the same as those of the second embodiment. Therefore, the description of the same part as in the second embodiment is omitted.

  FIG. 20 is a plan view showing the adhesive tape 1 of the first modification. As shown in FIG. 20, the protective film 12 of the present modification has a plurality of full width grooves 76 in the third region 83 in the protective film 12 of the second embodiment. One full width groove 76 may be provided.

  Here, the effect | action of the full width groove | channel 76 provided in the 3rd area | region 83 of the protective film 12 is demonstrated. FIG. 21 is a cross-sectional view showing the operation of the adhesive tape 1 of the present modification. (A) in FIG. 21 shows a case where the full width groove 76 is not provided in the third region 83 of the protective film 12. FIG. 21B shows a case where at least one full width groove 76 is provided in the third region 83 of the protective film 12.

  As shown by (a) in FIG. 21, when the full width groove 76 is not provided in the third region 83 of the protective film 12, the third region 83 of the adhesive tape 1 is placed on the side portion 50 c of the bundle 50 of paper sheets. It may be difficult to keep along. This is because the protective film 12 is hard to bend because the protective film 12 has a certain hardness.

  On the other hand, as shown by (b) in FIG. 21, when the full width groove 76 is provided in the third region 83 of the protective film 12, the protective film 12 can be easily bent along the full width groove 76. For this reason, it becomes easy to make the 3rd area | region 83 of the adhesive tape 1 follow the side part 50c of the bundle 50 of paper sheets. Thereby, the adhesive strength of the adhesive tape 1 with respect to the bundle 50 of paper sheets can further be raised.

The cut provided in the third region 83 of the protective film 12 may be a full width slit 75 instead of the full width groove 76. Even in such a configuration, the third region 83 of the adhesive tape 1 is easily aligned with the side portion 50c of the bundle 50 of paper sheets.
On the other hand, in this modification, the full width groove 76 is provided as a cut provided in the third region 83 of the protective film 12. The full width groove 76 does not reach the first surface 41 of the protective film 12. According to such a full width groove 76, even when the full width groove 76 is provided in the third region 83, the third region 83 is not easily extended unexpectedly as in the second embodiment. For this reason, the adhesive strength of the pressure-sensitive adhesive tape 1 to the bundle 50 of paper sheets is unlikely to decrease.

  FIG. 22 is a plan view showing a pressure-sensitive adhesive tape 1 according to a second modification. As shown in FIG. 22, the protective film 12 of the present reference example is different from the protective film 12 of the second embodiment in that it includes the central slit 21 and the end slit 22, and one broken slit 73 and a plurality of end portions. And a slit 71. The broken line slit 73 is provided in the third region 83 of the protective film 12.

  According to such a configuration, the protective film 12 is easily bent at the third region 83 as compared to the case where the broken line slit 73 is not provided. For this reason, it becomes easy to make the 3rd area | region 83 of the protective film 12 follow the side part 50c of the bundle 50 of paper sheets. In addition, when the slit provided in the 3rd area | region 83 of the protective film 12 is the broken-line slit 73, the 3rd area | region 83 is hard to be extended unexpectedly. For this reason, the adhesive strength of the 3rd field 83 to side part 50c of bundle 50 of paper sheets can be made high. The protective film 12 may have other shapes of slits or grooves instead of the dashed slit 73.

FIG. 23 is a plan view showing a pressure-sensitive adhesive tape 1 according to a third modification. As shown in FIG. 23, the protective film 12 of the present modification example includes two central slits 21 and a plurality of end portions instead of the central slit 21 and the end slits 22 in the protective film 12 of the second embodiment. And a slit 71.
The two central slits 21 are disposed closest to the third region 83 among the plurality of slits. According to such a configuration, the protective film 12 is provided with the central slit 21, so that it is easy to ensure the strength in the Y direction.

  FIG. 24 is a plan view showing the adhesive tape 1 of the first reference example. As shown in FIG. 24, in this reference example, the first region 81 of the protective film 12 has a plurality of end slits 71A and end slits 71B, respectively. Similarly, the second region 82 of the protective film 12 has a plurality of end slits 71A and end slits 71B, respectively. On the other hand, no slit is provided in the third region 83 of the protective film 12.

  FIG. 25 is a plan view showing the adhesive tape 1 of the second reference example. As shown in FIG. 25, the protective film 12 of the present reference example includes one full-width slit 75 instead of the one end slit 71A in the protective film 12 of the first reference example. According to such a configuration, the protective film 12 is easily bent along the full width slit 75. For this reason, it becomes easy to make the adhesive tape 1 follow the side part 50c of the bundle 50 of paper sheets. The full width slit 75 may have a full width 76. In this case, it becomes easy to ensure the strength of the protective film 12 in the Y direction.

  Since the protective film 12 includes the third region 83 also by the first to third modified examples of the second embodiment and the adhesive tape 1 of the first and second reference examples as described above, The adhesive strength of the pressure-sensitive adhesive tape 1 to the bundle 50 can be increased.

(Third embodiment)
Next, the adhesive tape 1 of 3rd Embodiment is demonstrated.
This embodiment is different from the first embodiment in that another adhesive layer 91 is provided between the adhesive layer 11 and the protective film 12. In addition, the other structure of this embodiment is the same as the structure of 1st Embodiment. Therefore, description of the same part as 1st Embodiment is abbreviate | omitted. In the following, “adhesive layer 11” is referred to as “first adhesive layer 11”, and “adhesive layer 91” is referred to as “second adhesive layer 91”.

  FIG. 26 is a cross-sectional view showing the adhesive tape 1 of the third embodiment. As shown in FIG. 26, the adhesive tape 1 has a second adhesive layer 91 (strong adhesive layer) between the first adhesive layer 11 and the protective film 12. In the present embodiment, the second adhesive layer 91 is formed of a material having a higher adhesive force than the first adhesive layer 11. For this reason, the adhesive force between the protective film 12 and the first adhesive layer 11 is greater than the adhesive force between the adherend A and the first adhesive layer 11. The second adhesive layer 91 can be stretched in the Y direction, like the first adhesive layer 11.

  According to such a configuration, when removing the adhesive tape 1 from the adherend A, the protective film 12 is detached from the first adhesive layer 11 before the first adhesive layer 11 is peeled off from the adherend A. Can be suppressed. Thereby, it can avoid that the whole 1st adhesion layer 11 is exposed outside until the removal of the adhesive tape 1 is completed. Thereby, it can suppress that the 1st adhesion layer 11 adheres to another member. Thereby, user convenience can be improved.

Next, a modification of the adhesive tape 1 of the third embodiment will be described.
In this modification, the adhesive force of the second adhesive layer is different from that of the third embodiment. The remaining configuration of this modification is the same as that of the third embodiment. Therefore, the description of the same part as in the third embodiment is omitted.

  FIG. 27 is a cross-sectional view showing an adhesive tape 1 according to one modification. As shown in FIG. 27, the adhesive tape 1 has a second adhesive layer 93 (weak adhesive layer) between the first adhesive layer 11 and the protective film 12. In the present embodiment, the second adhesive layer 93 is formed of a material having a lower adhesive force than the first adhesive layer 11. For this reason, the adhesive force between the protective film 12 and the first adhesive layer 11 is smaller than the adhesive force between the adherend A and the first adhesive layer 11. The second adhesive layer 93 can be stretched in the Y direction, like the first adhesive layer 11.

  According to such a configuration, when the adhesive tape 1 is removed from the adherend A, the protective film 12 is easily detached from the first adhesive layer 11. When the protective film 12 is detached from the first adhesive layer 11, the protective film 12 does not get in the way when the first adhesive layer 11 is stretched. For this reason, the detachability of the adhesive tape 1 is further improved.

(Fourth embodiment)
Next, the adhesive tape 1 of 4th Embodiment is demonstrated.
This embodiment is different from the second embodiment in that the adhesive force of the adhesive layer 11 is partially different. In addition, the other structure of this embodiment is the same as that of the structure of 2nd Embodiment. Therefore, the description of the same part as the first and second embodiments is omitted.

FIG. 28 is a plan view showing the adhesive tape 1 of the fourth embodiment. As shown in FIG. 28, the adhesive layer 11 of the present embodiment includes a first adhesive part 11a, a second adhesive part 11b, and a third adhesive part 11c. The first adhesive portion 11 a is provided in the first region 81 of the protective film 12. The first adhesive portion 11a is bonded to the first paper sheet 51A. The second adhesive portion 11 b is provided in the second region 82 of the protective film 12. The second adhesive portion 11b is bonded to the second paper sheet 51B.
The third adhesive portion 11 c is provided in the third region 83 of the protective film 12. The third adhesive portion 11c is adhered to the third paper sheet 51C.

  The adhesive strengths of the first adhesive portion 11a and the second adhesive portion 11b are substantially the same. On the other hand, the 3rd adhesion part 11c is formed with the material whose adhesive force is higher than the 1st adhesion part 11a and the 2nd adhesion part 11b. According to such a configuration, the third paper sheet 51 </ b> C, whose adhesive strength tends to be relatively small, can be more reliably held by the adhesive tape 1.

In the configuration of the present embodiment, the protective film 12 may have a plurality of slits 21 and 22 over the entire protective film 12 as in the first embodiment. Even in such a configuration, the third paper sheet 51C can be more reliably held because the adhesive force of the third adhesive part 11c is higher than the adhesive force of the first adhesive part 11a or the second adhesive part 11b. .
(Reference form)
Next, the adhesive tape 1 of a reference form is demonstrated.
This reference form is different from the first embodiment in that a plurality of holes 101 are provided instead of the slits. Note that other configurations of the present embodiment are the same as those of the first embodiment. Therefore, description of the same part as 1st Embodiment is abbreviate | omitted.

  FIG. 29 is a plan view showing the pressure-sensitive adhesive tape 1 of the present embodiment. As shown in FIG. 29, the protective film 12 of the present embodiment has a plurality of holes 101. The plurality of holes 101 are arranged in the X direction and the Y direction. For example, the hole 101 is a through hole that reaches the first surface 41 of the protective film 12. The hole 101 may be a bottomed hole (concave portion) that does not reach the first surface 41 of the protective film 12. The diameter of the hole 101 is not particularly limited. For example, the diameter of the hole 101 is larger than the thickness of the protective film 12. For example, the diameter of the hole 101 is larger than the thickness of the adhesive layer 11. The shape of the hole 101 is not limited to a circle. The shape of the hole 101 may be a polygon such as a triangle and a quadrangle, or other shapes.

  Even with such an adhesive tape 1, the adhesive layer 11 and the protective film 12 can be stretched together. Thereby, the adhesive tape 1 which can be easily peeled off from the adherend A can be provided.

Next, the 1st and 2nd reference examples of the adhesive tape 1 of a reference form are demonstrated.
In the first reference example, the position where the hole 101 is provided is different from the above-described reference embodiment. The second reference example is different from the above reference embodiment in that it has a broken line slit 73. The other configurations of the first and second reference examples are the same as the configurations of the reference embodiment. Therefore, the description of the same parts as those of the first and second embodiments and the reference embodiment is omitted.

  FIG. 30 is a plan view showing the adhesive tape 1 of the first reference example. As shown in FIG. 30, the protective film 12 of the present reference example has first to third regions 81, 82, and 83, similarly to the protective film 12 of the second embodiment. The hole 101 is provided in the first and second regions 81 and 82 of the protective film 12. The hole 101 is not provided in the third region 83 of the protective film 12. According to such a configuration, similarly to the second embodiment, the adhesive strength of the adhesive tape 1 to the bundle 50 of paper sheets can be increased.

  FIG. 31 is a plan view showing the adhesive tape 1 of the second reference example. As shown in FIG. 31, the protective film 12 of this reference example has a broken line slit 73 in the third region 83 of the protective film 12. According to such a configuration, similarly to the second reference example of the second embodiment, the third region 83 of the protective film 12 can be easily placed along the side portion 50c of the bundle 50 of paper sheets.

  In the above, the configurations according to the first to fourth embodiments, one reference embodiment, and modifications and reference examples thereof have been described, but the configurations of each embodiment, reference embodiment, each modification, and each reference example are as follows. It is not limited to the above example. These configurations can be applied in combination with each other.

  Hereinafter, a sheet binding apparatus according to an embodiment will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. And the description which overlaps those structures may be abbreviate | omitted.

With reference to FIG.32 and FIG.33, the binding apparatus 110 of the paper sheets 51 of embodiment is demonstrated. FIG. 32 is a side view illustrating the binding device 110 according to the embodiment. FIG. 33 is a plan view illustrating a main part of the bundle creating unit 120 of the embodiment.
As illustrated in FIG. 32, the binding device 110 includes a bundle creating unit 120 and a tape mounting unit 130.

First, the bundle creation unit 120 will be described.
As shown in FIG. 32, the bundle creating unit 120 creates a bundle 50 (see FIG. 34) of the paper sheets 51 by stacking a plurality of paper sheets 51. The bundle creating unit 120 includes a first roller 121, a second roller 122, a main guide 123, a sub guide 124, a stopper 125, and a switching member 126. The first roller 121 corresponds to a “first contact member” recited in the claims. The second roller 122 corresponds to a “second contact member” recited in the claims.

  The shape of the first roller 121 is a columnar shape extending in the X direction. The first roller 121 abuts on the first surface 50a (see FIG. 34) of the bundle 50. The first roller 121 is attached to the first shaft 121a. As shown in FIG. 33, the first shaft 121 a extends along the central axis of the first roller 121. The first shaft 121a extends in the X direction. A plurality (four in the embodiment) of the first rollers 121 are arranged in the direction along the first shaft 121a. A motor (not shown) is provided at one end of the first shaft 121a. Usually, the rotational drive by the motor is decelerated by a pulley belt gear (not shown). The first roller 121 is rotationally driven by a motor together with the first shaft 121a.

  The first roller 121 rotates independently. The first roller 121 rotates at a fixed position without moving with respect to a frame inside the binding device 110 (hereinafter referred to as “device frame”). The first roller 121 is arranged such that a part of the outer peripheral surface is located closer to the sub guide 124 than the main guide 123 in the Z direction. That is, the first roller 121 protrudes from the main guide 123 toward the sub guide 124 to the extent that a part of the outer peripheral surface comes into contact with the first surface 50a (see FIG. 34) of the bundle 50.

  The material of the first roller 121 is not particularly limited. For example, the first roller 121 is made of ethylene propylene diene rubber (EPDM).

  The shape of the second roller 122 is a columnar shape extending in the X direction. The second roller 122 faces the first roller 121 in the Z direction. The second roller 122 can contact the second surface 50b (see FIG. 34) of the bundle 50. The second shaft 122 a extends along the central axis of the second roller 122. The second shaft 122a extends along the first shaft 121a. A plurality (four in the embodiment) of the second rollers 122 are arranged in the direction along the second shaft 122a. As viewed from the Z direction, each second roller 122 overlaps each first roller 121.

  The second roller 122 can be brought into and out of contact with the first roller 121 in the Z direction by a drive mechanism (not shown). The second roller 122 rotates according to the rotation of the first roller 121. When the second roller 122 abuts on the second surface 50 b (see FIG. 34) of the bundle 50, the second roller 122 is disposed so that a part of the outer peripheral surface is positioned on the main guide 123 side with respect to the sub guide 124 in the Z direction. The

  As shown in FIG. 36, the outer peripheral surface 122 f of the second roller 122 is formed to be more easily deformed along the surface of the bundle 50 than the outer peripheral surface 121 f of the first roller 121. The outer peripheral surface 122f of the second roller 122 is formed of a material having a lower elastic modulus than the outer peripheral surface 121f of the first roller 121. For example, the second roller 122 is formed of a sponge. The second roller 122 may be formed of rubber having a cavity inside.

  As shown in FIG. 32, the main guide 123 guides the paper sheet 51. The main guide 123 can stack a bundle 50 of paper sheets 51. The main guide 123 includes a main guide plate 123a, a first main guide piece 123c, and a second main guide piece 123d.

The main guide plate 123a is a plate material having a thickness in the Z direction.
The first main guide piece 123c is connected to one end of the main guide plate 123a. When viewed from the X direction, the first main guide piece 123c extends so as to be separated from the paper sheet 51 (bundle 50).
The second main guide piece 123d is connected to the other end of the main guide plate 123a. When viewed from the X direction, the second main guide piece 123d extends in an inclined manner toward the side opposite to the first main guide piece 123c so as to be separated from the paper sheets 51 (bundle 50). The second main guide piece 123d is formed with a recess 123h (see FIG. 33) that is recessed toward the main guide plate 123a.

  As shown in FIG. 33, the shape of the other end portion of the main guide 123 is a comb-like shape when viewed from the Z direction. The other end portion of the main guide 123 is provided with an extending portion 123b extending in the Y direction. A plurality (five in the embodiment) of the extending portions 123b are arranged at intervals in the X direction. A first roller 121 is disposed between two adjacent extending portions 123b.

  As shown in FIG. 32, the sub guide 124 faces the main guide 123 in the Z direction. The length of the sub guide 124 in the Y direction is shorter than the length of the main guide 123 in the Y direction. The sub guide 124 includes a sub guide plate 124a, a first sub guide piece 124c, and a second sub guide piece 124d.

The sub guide plate 124a is a plate material having a thickness in the Z direction. The sub guide plate 124a is disposed at a distance from the main guide plate 123a in the Z direction. The distance between the sub guide plate 124 a and the main guide plate 123 a is larger than the thickness of the bundle 50.
The first sub guide piece 124c is connected to one end of the sub guide plate 124a. When viewed from the X direction, the first sub-guide piece 124c extends so as to be separated from the paper sheet 51 (bundle 50).
The second sub guide piece 124d is connected to the other end of the sub guide plate 124a. When viewed from the X direction, the second sub-guide piece 124d extends in an inclined manner away from the paper sheets 51 (bundle 50) toward the side opposite to the first sub-guide piece 124c.

  As shown in FIG. 33, the sub guide plate 124a extends in the Y direction. A plurality of (five in the embodiment) sub guide plates 124a are arranged at intervals in the X direction. A second roller 122 is disposed between the two adjacent sub guide plates 124a.

  The stopper 125 is disposed in the recess 123h of the second main guide piece 123d. The stopper 125 is configured to be movable in the Z direction by a moving mechanism (not shown). Specifically, the stopper 125 contacts the sub-guide 124 from the surface of the main guide plate 123a in the Z direction so that the end of the conveyed paper sheet 51 is brought into contact with the stopper 125 to dam the plurality of paper sheets 51. It is configured to be movable to a position close to (see FIG. 34). Further, the stopper 125 is movable from the surface of the main guide plate 123a to a position close to the first shaft 121a in the Z direction so that the bundle 50 of the paper sheets 51 is conveyed toward the tape mounting portion 130. (See FIG. 35).

  As shown in FIG. 32, the switching member 126 is disposed with a gap from the main guide 123 in the Y direction. The switching member 126 switches the conveyance path according to the post-processing of the bundle 50. Hereinafter, the direction in which the bundle 50 of paper sheets 51 is conveyed toward the tape mounting unit 130 (specifically, a tape wrapping unit 140 described later) is referred to as a “first conveyance direction”. A direction in which the bundle 50 of the paper sheets 51 is conveyed toward the side opposite to the sub guide 124 in the Z direction is referred to as a “second conveyance direction”. The switching member 126 switches the conveyance path between the first conveyance direction and the second conveyance direction.

Next, the tape mounting part 130 will be described.
As shown in FIG. 32, the tape mounting unit 130 includes an unwinding unit 131, a transport unit 132, a separating member 133, a winding unit 134, a guide base 135, a tape holding unit 136, a cutter 137, and a tape wrapping unit 140.

  The unwinding part 131 holds an original fabric roll 131R around which the belt-shaped adhesive tape 1 is wound. In the raw roll 131R, the adhesive tape 1 is wound so that the release film 13 is disposed outside and the protective film 12 is disposed inside. The unwinding unit 131 feeds the adhesive tape 1 along the length direction of the adhesive tape 1.

  The transport unit 132 transports the adhesive tape 1 fed out from the unwinding unit 131 along the length direction of the adhesive tape 1. The conveyance unit 132 includes a pair of conveyance rollers 132a and 132b. The pair of transport rollers 132a and 132b face each other with the adhesive tape 1 in between.

  The separation member 133 is a triangular prism-shaped member extending in the X direction. The length of the separating member 133 in the X direction is longer than the width of the adhesive tape 1 (length in the X direction). The release film 13 separated from the adhesive tape 1 is wound around the separation member 133.

  The winding unit 134 winds the release film 13 separated from the adhesive tape 1 by the separation member 133. The winding unit 134 holds a peeling roll 134R around which the strip-shaped peeling film 13 is wound.

  The guide stand 135 guides the adhesive tape 1 from which the release film 13 has been separated. The guide stand 135 supports the adhesive tape 1 from the protective film 12 side when the adhesive tape 1 is held or cut. The guide table 135 includes a guide plate 135a, a first guide piece 135c, and a second guide piece 135d.

The guide plate 135a is a plate material having a thickness in the Z direction.
The first guide piece 135c is connected to one end of the guide plate 135a. When viewed from the X direction, the first guide piece 135c extends so as to be separated from the adhesive tape 1.
The second guide piece 135d is connected to the other end of the guide plate 135a. When viewed from the X direction, the second guide piece 135d extends in an inclined manner away from the adhesive tape 1 toward the side opposite to the first guide piece 135c.

  The tape holding unit 136 supports the adhesive tape 1 in a state where the posture of the adhesive tape 1 is held flat. For example, the tape holding unit 136 supports the adhesive tape 1 in a state where the adhesive tape 1 extends in the Z direction as viewed from the X direction (the adhesive tape 1 is flat). The tape holding unit 136 includes a first holding member 136a, a second holding member 136b, and a connecting member 136c.

  The first holding member 136 a holds one end side of the adhesive tape 1. The second holding member 136 b holds the other end side of the adhesive tape 1. The first holding member 136a and the second holding member 136b are triangular prism-shaped members extending in the X direction. The lengths of the first holding member 136a and the second holding member 136b in the X direction are longer than the width of the adhesive tape 1 (the length in the X direction).

  The connecting member 136c connects the first holding member 136a and the second holding member 136b. When viewed from the Y direction, the connecting member 136 c is disposed outside the width direction of the adhesive tape 1. That is, the connecting member 136 c does not overlap the adhesive tape 1 when viewed from the Y direction. Further, the connecting member 136c is arranged at a position where the bundle 50 sent out from the bundle creating unit 120 does not interfere. That is, the connection member 136c does not overlap the bundle 50 as viewed from the Y direction.

  The tape holding unit 136 is configured to be movable in the Z direction and the Y direction by a moving mechanism (not shown). Specifically, the tape holding part 136 is configured to be movable between the guide base 135 and the tape wrapping part 140 in the Z direction. In addition, the tape holding unit 136 is configured to be close to or away from the guide table 135 in the Y direction.

  The cutter 137 cuts the adhesive tape 1. Specifically, the cutter 137 cuts the strip-shaped adhesive tape 1 to form the sheet-shaped adhesive tape 1. The cutter 137 is located closer to the bundle creating unit 120 in the guide table 135 in the Z direction. The cutter 137 includes a cutting blade 137a and a support shaft 137b. The cutting blade 137a has a disk shape. The support shaft 137b is fixed on the central axis of the cutting blade 137a. For example, the cutter 137 is a rotary cutter. The cutting blade 137a is configured to be rotatable around the support shaft 137b together with the support shaft 137b by a drive mechanism (not shown).

  The cutter 137 is configured to be movable in the X direction and the Y direction by a moving mechanism (not shown). Specifically, the cutter 137 is configured to be movable over the entire width direction of the adhesive tape 1 in the X direction. Further, the cutter 137 is configured to be close to or away from the guide table 135 in the Y direction.

  The tape wrap 140 is disposed next to the guide table 135 in the Z direction. Specifically, the tape wrapping unit 140 is disposed on the opposite side of the conveyance unit 132 with the guide table 135 interposed therebetween in the Z direction. The tape wrapping unit 140 includes a first urging unit 141 and a second urging unit 142.

The first urging unit 141 includes a first roller 141a, a first shaft 141b, a first arm 141c, and a first spring 141d.
The second urging portion 142 is disposed on the opposite side of the guide base 135 with the first urging portion 141 in between in the Z direction. The second urging portion 142 includes a second roller 142a, a second shaft 142b, a second arm 142c, and a second spring 142d.

  The shape of the first roller 141a is a columnar shape extending in the X direction. For example, the first roller 141a is formed of an elastic member such as rubber. The first roller 141a is attached to the first shaft 141b. The first shaft 141b extends along the central axis of the first roller 141a. The first roller 141a faces the second roller 142a in a posture where the outer peripheral surfaces of the first roller 141a and the second roller 142a are in contact with each other. The first arm 141c extends in a direction in which the first roller 141a and the second roller 142a face each other. One end of the first arm 141c rotatably supports the end of the first shaft 141b. One end of the first spring 141d is attached to the other end of the first arm 141c. The other end of the first spring 141d is attached to a device frame (not shown). The first spring 141d biases the first roller 141a toward the second roller 142a via the first arm 141c.

  The second roller 142a, the second shaft 142b, the second arm 142c, and the second spring 142d have the same configuration as the first roller 141a, the first shaft 141b, the first arm 141c, and the first spring 141d described above. Therefore, detailed description is omitted.

  In the present embodiment, the first roller 141a and the second roller 142a are urged in a direction in which they abut against each other. The first roller 141a corresponds to a “first urging member” recited in the claims. The second roller 142a corresponds to a “second biasing member” recited in the claims.

Hereinafter, an example of the operation of the binding device 110 will be described.
34 to 37 and FIGS. 40 to 49 are diagrams illustrating an example of the operation of the binding device 110.

  First, as shown in FIG. 34, a plurality of paper sheets 51 are stacked on each other to form a bundle 50 of paper sheets 51. Specifically, first, the stopper 125 is moved between the main guide plate 123a and the sub guide plate 124a. That is, the stopper 125 is moved from the surface of the main guide plate 123a to a position close to the sub guide 124 in the Z direction.

  Next, the paper sheets 51 are conveyed between the main guide plate 123a and the sub guide plate 124a of the bundle creating unit 120, and sequentially abut against the stopper 125 one by one. Then, a plurality of paper sheets 51 are stacked on the main guide 123 in a state where the end of each paper sheet 51 is in contact with the stopper 125. Thereby, the bundle 50 of the paper sheets 51 in which the side part 50c was formed in linear form is obtained.

  Next, as shown in FIG. 35, the stopper 125 is released. Specifically, the stopper 125 is moved to the opposite side of the sub guide plate 124a with the main guide plate 123a interposed therebetween. That is, the stopper 125 is moved from the surface of the main guide plate 123a to a position close to the first shaft 121a in the Z direction.

  Next, as shown in FIG. 36, the second roller 122 is brought close to the first roller 121. Specifically, the second roller 122 is brought into pressure contact with the first roller 121 while the bundle 50 is sandwiched between the first roller 121 and the second roller 122. As described above, the outer peripheral surface 122 f of the second roller 122 is easier to deform along the surface of the bundle 50 than the outer peripheral surface 121 f of the first roller 121. Therefore, a portion of the bundle 50 that is sandwiched between the first roller 121 and the second roller 122 bends along the outer peripheral surface 121 f of the first roller 121. In addition, the outer peripheral surface 122 f of the second roller 122 is deformed along the second surface 50 b of the bundle 50. That is, the outer peripheral surface 122 f of the second roller 122 is curved and recessed inward in the radial direction of the second roller 122 so as to follow the outer peripheral surface 121 f of the first roller 121.

  Next, as shown in FIGS. 37 and 38, the side portions 50c of the bundle 50 are formed in a step shape. Specifically, first, by switching the switching member 126, the transport path is switched from the first transport direction to the second transport direction. Next, the first roller 121 is actively rotated (normally rotated) in the direction of the arrow V1 in a state where the outer peripheral surface 122f of the second roller 122 is deformed along the second surface 50b of the bundle 50. Along with this, the second roller 122 is driven to rotate (forward rotation) in the direction of the arrow V2. Then, the plurality of paper sheets 51 are shifted in the third direction W by sending the bundle 50 in the third direction W intersecting the edge 61a (see FIG. 6). Specifically, with respect to the paper sheet 51 on the first surface 50a side, the plurality of paper sheets 51 so that the paper sheet 51 on the second surface 50b side extends first toward the tape mounting portion 130 (see FIG. 32). The leaves 51 are shifted in the third direction W.

Hereinafter, the principle that the side portions 50c of the bundle 50 are stepped will be described.
As described above, when the second roller 122 is brought into pressure contact with the first roller 121 via the bundle 50, the outer peripheral surface 122 f of the second roller 122 is aligned with the outer peripheral surface 121 f of the first roller 121. Curved and dented radially inward. Hereinafter, the circumferential length (arc length) d1 of the portion of the outer peripheral surface 121f of the first roller 121 that is in contact with the first surface 50a of the bundle 50 is referred to as a “first length d1”. The length d2 in the direction along the circumferential direction of the first roller 121 of the outer surface 122f of the second roller 122 that is in contact with the second surface 50b (the recessed portion) of the bundle 50 is referred to as “second length d2”. That's it. As the thickness t of the bundle 50 increases, the second length d2 becomes longer than the first length d1.

  In a state where the bundle 50 is sandwiched between the first roller 121 and the second roller 122 and the outer peripheral surface 122f of the second roller 122 is deformed along the second surface 50b of the bundle 50, the first roller 121 and the second roller The roller 122 is rotated forward to send the bundle 50 in the third direction W. Then, the moving distance of the outer peripheral surface 122 f of the second roller 122 becomes longer than the moving distance of the outer peripheral surface 121 f of the first roller 121. That is, the feed amount of the bundle 50 in the third direction W increases toward the second surface 50b. Therefore, the side portion 50c of the bundle 50 is such that the paper sheet 51 on the second surface 50b side extends first toward the tape mounting portion 130 (see FIG. 32) with respect to the paper sheet 51 on the first surface 50a side. Become a staircase.

Here, the shift amount between the first surface 50a and the second surface 50b in the side portion 50c of the bundle 50 is “d”, the thickness of the bundle 50 is “t”, the first length is “d1”, Assuming that the second length is “d2”, the central angle with respect to the first length d1 (arc length) is “θ (rad)”, and the rotational speed of the first roller 121 is “n”, (1) to (4) hold.
d = d2-d1 (1)
d1 = r × θ (2)
d2 = (r + t) × θ (3)
θ = 2 × π × n (4)

From the above formulas (1) to (4), the following formula (5) is obtained.
d = 2 × π × t × n (5)

  As shown in the above equation (5), the shift amount d increases as the thickness t of the bundle 50 increases or as the rotational speed n (center angle θ) increases.

  Next, as shown in FIG. 40, the second roller 122 is moved away from the first roller 121. Specifically, the second roller 122 is separated from the first roller 121 in a state where the bundle 50 is sandwiched between the first roller 121 and the second roller 122. The distance between the second roller 122 and the first roller 121 is substantially the same as the thickness of the bundle 50. The second roller 122 is moved away from the first roller 121 in a state where the bundle 50 is sandwiched between the first roller 121 and the second roller 122, so that the outer surface 122f of the second roller 122 is recessed (see FIG. 37). ). That is, the outer peripheral surface 122f of the second roller 122 is brought into contact with the second surface 50b of the bundle 50 while returning the outer peripheral surface 122f of the second roller 122 to the original shape.

  Next, as shown in FIG. 41, the first roller 121 is actively rotated (reversed) in the direction of the arrow V3. Since the outer peripheral surface 122f of the second roller 122 is in contact with the second surface 50b of the bundle 50, the second roller 122 is driven to rotate (reverse) in the direction of the arrow V4. Then, the bundle 50 moves toward the side opposite to the tape mounting portion 130 (see FIG. 32).

  Next, as illustrated in FIG. 42, the conveyance path is switched from the second conveyance direction to the first conveyance direction by switching the switching member 126. Then, the first roller 121 and the second roller 122 are normally rotated in a state where the outer peripheral surface 122f of the second roller 122 is in contact with the second surface 50b of the bundle 50. Then, the bundle 50 moves toward the tape mounting part 130 (see FIG. 32, specifically, the tape wrapping part 140).

  Next, the adhesive tape 1 is attached to the edge 61 of the bundle 50 by a wrapping operation. Hereinafter, the wrapping operation will be described.

  First, as shown in FIG. 43, the pressure-sensitive adhesive tape 1 is set in a state where the pressure-sensitive adhesive tape 1 has been unwound in advance along the length direction of the pressure-sensitive adhesive tape 1. In this state, the tape holding part 136 is moved to the guide table 135 side. That is, the pressure-sensitive adhesive tape 1 is supported by the tape holding unit 136 in a state where the posture of the pressure-sensitive adhesive tape 1 is held.

  Next, as shown in FIG. 44, the tape holding part 136 is moved to the tape wrapping part 140 side. The tape holding part 136 arranges the adhesive tape 1 so as to straddle the first roller 141a and the second roller 142a. The tape holding unit 136 stands by between the bundle creating unit 120 (see FIG. 32) and the tape wrapping unit 140 in a state where the posture of the adhesive tape 1 is held flat.

  Next, as shown in FIG. 45, the strip-shaped adhesive tape 1 is cut by the cutter 137 to form the sheet-shaped adhesive tape 1.

  Next, as shown in FIG. 46, the bundle 50 is moved toward the tape wrapping portion 40, and the edge portion 61 of the bundle 50 is inserted between the first roller 141a and the second roller 142a together with the adhesive tape 1. . 47, the adhesive tape 1 is attached to the edge 61 of the bundle 50.

  As described above, the first roller 141a and the second roller 142a are urged in a direction in which they contact each other. Therefore, when the edge 61 of the bundle 50 is inserted between the first roller 141a and the second roller 142a together with the adhesive tape 1, the first roller 141a and the second roller 142a are along the edge 61 of the bundle 50. Moving. Specifically, the adhesive tape 1 is abutted against the tip (protruding end) of the edge 61 of the bundle 50. In addition, the edge portion 61 of the bundle 50 is made to enter between the first roller 141 a and the second roller 142 a together with the adhesive tape 1. Then, the adhesive tape 1 sequentially follows and adheres to the stepped portion of the bundle 50, the portion on the first surface 50a side, and the portion on the second surface 50b side.

  Next, as shown in FIG. 48, the bundle 50 is moved toward the bundle creating unit 120 (see FIG. 32), and the bundle 50 with the adhesive tape 1 is placed between the first roller 121 and the second roller 122. Take out from. Thereafter, the tape holding unit 136 is moved to the guide table 135 side. Then, with the tape holding unit 136 holding the posture of the adhesive tape 1, the adhesive tape 1 is pulled out and waits for the next binding processing operation. In other words, the tape mounting part 130 returns to the state of FIG.

  49, the first roller 121 and the second roller 122 are reversed in a state where the outer peripheral surface 122f of the second roller 122 is in contact with the second surface 50b of the bundle 50. Then, the bundle 50 attached with the adhesive tape 1 is returned to a predetermined position.

  Thereafter, the bundle 50 with the adhesive tape 1 attached is discharged to a discharge portion (not shown). In addition, before discharging the bundle 50 to which the adhesive tape 1 is attached, the bundle 50 to which the adhesive tape 1 is attached may be subjected to post-processing such as punching (punching).

  Conventionally, as a binding device, a stapler of a metal needle has been mainstream. In recent years, as a binding device, a pressure type device has been developed in which the paper sheets 51 are processed into a tooth shape by pressure, and the processed paper sheets 51 are temporarily fixed. Since any of the binding devices requires a large force during the binding operation of the paper sheets 51, it is common to employ a motor drive such as a DC motor when electrifying. However, any of the binding devices may cause problems such as an increase in power consumption of the motor and generation of noise during the binding operation. Further, in the pressure type apparatus, there is a possibility that only about a few sheets 51 are bound. In addition, since the processed paper sheets 51 are temporarily fixed to each other, the binding strength may not be sufficient even when the paper sheets 51 are bound.

  According to the embodiment, the binding device 110 includes a bundle creating unit 120 and a tape mounting unit 130. The bundle creation unit 120 creates a bundle 50 of paper sheets 51 by stacking a plurality of paper sheets 51. The tape mounting unit 130 mounts the adhesive tape 1 and binds the bundle 50 so as to straddle the first surface 50a, the second surface 50b, and the side portion 50c of the bundle 50 at the edge 61 of the bundle 50. With the above configuration, the following effects can be obtained. The force required for the binding device 110 during the binding operation is sufficient. Therefore, it is possible to reduce the power consumption of the motor and suppress the generation of noise during the binding operation. In addition, the number of sheets 51 can be increased.

  The bundle creating unit 120 produces the following effect by creating the bundle 50 shifted in the third direction W in which the plurality of paper sheets 51 intersect the edge 61a. Compared with the case where the side part 50c is formed linearly, the surface area of the side part 50c which contacts the adhesion layer 11 can be increased. Here, as shown in FIG. 7, the adhesive strength between the third paper sheet 51 </ b> C and the adhesive tape 1 is the adhesion between the first paper sheet 51 </ b> A or the second paper sheet 51 </ b> B and the adhesive tape 1. Compared to strength, it tends to be small. However, according to the embodiment, since the plurality of paper sheets 51 are displaced from each other at the edge 61 of the bundle 50 of the paper sheets 51, the adhesion area between each third paper sheet 51C and the adhesive tape 1 is increased. Can do. Therefore, the intermediate page of the bundle 50 of paper sheets 51 can be firmly held by the adhesive tape 1. In another aspect, when the user performs the process of removing the bundle 50, when the first paper sheet 51A and the second paper sheet 51B are pulled so as to stretch the adhesive tape 1 in the Y direction, the adhesive layer 11 is removed. The contact area between the third paper sheet 51C and the adhesive layer 11 is reduced. Thereby, it is possible to easily remove the third paper sheet 51 </ b> C from the adhesive tape 1 without damaging the paper sheet 51.

  The bundle creating unit 120 includes a first roller 121 and a second roller 122. The first roller 121 contacts the first surface 50 a of the bundle 50. The second roller 122 can contact the second surface 50 b of the bundle 50. The outer peripheral surface 122 f of the second roller 122 is formed to be more easily deformed along the surface of the bundle 50 than the outer peripheral surface 121 f of the first roller 121. The bundle creating unit 120 sandwiches the bundle 50 between the first roller 121 and the second roller 122. The bundle creating unit 120 rotates the first roller 121 and the second roller 122 following the rotation of the outer peripheral surface 122f of the second roller 122 along the second surface 50b of the bundle 50. The bundle creating unit 120 shifts the plurality of paper sheets 51 in the third direction W by sending the bundle 50 in the third direction W. With the above configuration, the following effects can be obtained. Since the hardness of the outer peripheral surface 122f of the second roller 122 only needs to be smaller than the hardness of the outer peripheral surface 121f of the first roller 121, the plurality of paper sheets 51 are displaced in the third direction W with a simple device configuration. A bundle 50 can be made. Therefore, the intermediate page of the bundle 50 of paper sheets 51 can be firmly held by the adhesive tape 1 with a simple apparatus configuration.

  In the bundle creating unit 120, the first roller 121 rotates independently. The second roller 122 rotates according to the rotation of the first roller 121. With the above configuration, the following effects can be obtained. Since it is not necessary to separately provide a mechanism for driving the second roller 122, the binding device 110 can be simplified and reduced in cost.

  The tape mounting unit 130 includes a first roller 141a and a second roller 142a. The first roller 141a and the second roller 142a are urged in the direction in which they contact each other. The tape mounting part 130 arrange | positions the adhesive tape 1 so that it may straddle the 1st roller 141a and the 2nd roller 142a. The tape mounting unit 130 inserts the edge 61 of the bundle 50 together with the adhesive tape 1 between the first roller 141a and the second roller 142a, and attaches the adhesive tape 1 to the edge 61 of the bundle 50. With the above configuration, the following effects can be obtained. Since the first roller 141a and the second roller 142a move along the edge 61 of the bundle 50, the followability of the adhesive tape 1 with respect to the edge 61 of the bundle 50 can be improved. Thereby, since the adhesive tape 1 adheres along the edge 61 of the bundle 50, the edge 61 of the bundle 50 can be firmly wrapped with the adhesive tape 1. Therefore, the edge portion 61 of the bundle 50 can be held more firmly by the adhesive tape 1. In addition, since the adhesive tape 1 automatically follows the edge 61 of the bundle 50, the edge 61 of the bundle 50 can be reliably held by the adhesive tape 1 with a simple device configuration.

Hereinafter, modified examples will be described.
For example, the bundle creating unit 120 is not limited to including the first roller 121 and the second roller 122. For example, as illustrated in FIG. 50, the bundle creating unit 220 may include a first roller 121 and a belt mechanism 221.

  The belt mechanism 221 includes a belt 222, a first pulley 223, and a second pulley 224. The belt 222 is wound around the first pulley 223 and the second pulley 224. The belt 222 faces the first roller 121 between the first pulley 223 and the second pulley 224. The belt 222 can contact the second surface 50 b of the bundle 50 between the first pulley 223 and the second pulley 224.

  The belt mechanism 221 can be brought into and out of contact with the first roller 121 by a drive mechanism (not shown). The first pulley 223 and the second pulley 224 are rotatably supported. Therefore, the belt 222 rotates according to the rotation of the first roller 121. In this modification, a portion of the outer peripheral surface 222f of the belt 222 disposed between the first pulley 223 and the second pulley 224 is deformed along the surface of the bundle 50 from the outer peripheral surface 121f of the first roller 121. It is formed to be easy to do.

Hereinafter, an example of the operation of the belt mechanism 221 of this modification will be described.
As shown in FIG. 51, in this modification, the belt mechanism 221 is brought close to the first roller 121. Specifically, the belt 222 is pressed against the first roller 121 in a state where the bundle 50 is sandwiched between the first roller 121 and the belt 222. As described above, a portion of the outer peripheral surface 222f of the belt 222 disposed between the first pulley 223 and the second pulley 224 is deformed along the surface of the bundle 50 from the outer peripheral surface 121f of the first roller 121. Cheap. Therefore, a portion of the bundle 50 sandwiched between the first roller 121 and the belt 222 bends along the outer peripheral surface 121 f of the first roller 121. In addition, a portion of the outer peripheral surface 222 f of the belt 222 that is disposed between the first pulley 223 and the second pulley 224 is deformed along the second surface 50 b of the bundle 50. That is, a portion of the outer peripheral surface 222f of the belt 222 that is disposed between the first pulley 223 and the second pulley 224 is along the outer peripheral surface 121f of the first roller 121 so that the first pulley 223 and the second pulley Curved and recessed in the space between 224.

  Next, the side part 50c of the bundle 50 is formed in a step shape. Specifically, first, by switching the switching member 126, the transport path is switched from the first transport direction to the second transport direction. Next, in a state where a portion of the outer peripheral surface 222f of the belt 222 disposed between the first pulley 223 and the second pulley 224 is deformed along the second surface 50b of the bundle 50, the first roller 121 is used. Rotate (forward). Along with this, the first pulley 223 and the second pulley 224 are driven to rotate (forward rotation). Then, the plurality of paper sheets 51 are shifted in the third direction W by sending the bundle 50 in the third direction W (see FIG. 37).

In the above-described embodiment, the bundle creating unit 120 has been described with the example in which the first roller 121 is provided as the first contact member and the second roller 122 is provided as the second contact member. However, the present invention is not limited thereto. .
For example, the bundle creating unit 120 may include a first pad having an arc portion (for example, a half-moon-shaped member) that can contact the first surface 50a of the bundle 50 as the first contact member. Or the bundle creation part 120 may be provided with the 2nd pad which has an arc part which can contact | abut to the 2nd surface 50b of the bundle 50 as a 2nd contact member.

In the above-described embodiment, the example in which the first roller 121 is actively rotated and the second roller 122 is driven and rotated in the bundle creating unit 120 has been described. However, the present invention is not limited thereto.
For example, both the first roller 121 and the second roller 122 may rotate independently. That is, it is sufficient that at least one of the first roller 121 and the second roller 122 is actively rotated and the other is driven and rotated. In addition, there exists the following effect when both the 1st roller 121 and the 2nd roller 122 rotate independently. Compared to the case where the second roller 122 rotates in accordance with the rotation of the first roller 121, the shift of the paper sheet 51 can be made uniform between the first surface 50a side and the second surface 50b side. Can be sent stably.

In the above-described embodiment, the example in which the first roller 141a and the second roller 142a are urged in the direction in which they abut each other in the tape mounting unit 130 has been described.
For example, only the first roller 141a may be urged in a direction in which it abuts on the second roller 142a. Or only the 2nd roller 142a may be urged | biased in the direction contact | abutted to the 1st roller 141a. That is, it suffices that at least one of the first roller 141a and the second roller 142a is urged in a direction in which it abuts the other.

Further, in the above-described embodiment, the tape mounting unit 130 has been described with an example in which the first roller 141a is provided as the first biasing member and the second roller 142a is provided as the second biasing member. Absent.
For example, the tape mounting portion 130 may include a first pad having an arc portion as the first biasing member. Alternatively, the tape mounting portion 130 may include a second pad having an arc portion as the second urging member.

In the above-described embodiment, in the operation of the binding device 110, the outer peripheral surface 122f of the second roller 122 is returned to the original shape while the outer peripheral surface 122f of the second roller 122 is brought into contact with the second surface 50b of the bundle 50. Although an example of contact (see FIG. 40) has been described, the present invention is not limited to this.
For example, the outer peripheral surface 122f of the second roller 122 may be separated from the second surface 50b of the bundle 50 while returning the outer peripheral surface 122f of the second roller 122 to the original shape. That is, the first roller 121 may be actively rotated (reversed) in the direction of the arrow V3 (see FIG. 41) in a state where the outer peripheral surface 122f of the second roller 122 is separated from the second surface 50b of the bundle 50.

Moreover, in embodiment mentioned above, in the operation | movement (at the time of a wrapping operation | movement start) of the binding apparatus 110, the example which makes the state which let the adhesive tape 1 advance in the length direction of the adhesive tape 1 from the unwinding part 131 previously (refer FIG. 43). ), But is not limited to this.
For example, the following operation may be performed at the start of the wrapping operation. First, the adhesive tape 1 is unwound from the unwinding part 131 along the length direction of the adhesive tape 1. Next, the release film 13 separated by the separation member 133 is wound up by the winding unit 134. In addition, the pressure-sensitive adhesive tape 1 fed out from the unwinding unit 131 is conveyed along the length direction of the pressure-sensitive adhesive tape 1 by the conveyance unit 132. Further, the tape holding unit 136 is moved to the guide table 135 side. And the adhesive tape 1 is supported by the tape holding | maintenance part 136 in the state which hold | maintained the attitude | position of the adhesive tape 1. FIG.

In the embodiment described above, in the operation of the binding device 110, the number of the adhesive tapes 1 attached to the edge 61 of the bundle 50 is not limited. For example, one adhesive tape 1 that extends over the entire width direction of the bundle 50 may be attached to the edge portion 61 of the bundle 50. Alternatively, a plurality of adhesive tapes 1 arranged at intervals in the width direction of the bundle 50 may be attached to the edge portion 61 of the bundle 50.
For example, when a plurality of adhesive tapes 1 are mounted on the edge 61 of the bundle 50, the tape mounting unit 130 may be moved in the X direction with respect to the bundle creating unit 120 by a moving mechanism (not shown). Alternatively, the bundle creating unit 120 may be moved in the X direction with respect to the tape mounting unit 130 by a moving mechanism (not shown). That is, the bundle creating unit 120 and the tape mounting unit 130 may be configured to be movable relative to each other in the X direction.

  Moreover, although embodiment mentioned above gave and demonstrated the example which can peel the adhesive tape 1 from the to-be-adhered body A, it does not restrict to this. For example, the adhesive tape 1 may not be peelable from the adherend A. That is, the adhesive tape 1 can be provided with various characteristics according to the required specifications.

  In addition, when using what can peel from the to-be-adhered body A as the adhesive tape 1, it is preferable to use what is provided with the adhesive layer 11 with high adhesive force and excellent in breaking strength. According to this configuration, the adhesive layer 11 can be peeled from the paper sheet 51 without any adhesive residue on the paper sheet 51.

  According to at least one embodiment described above, the protective film 12 has the central slit 21 at least partially extending in the X direction. Thereby, the adhesion layer 11 and the protective film 12 can be stretched together. Thereby, the adhesive tape 1 which can be easily peeled off from the adherend A can be provided.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  A: adherend, W: third direction, 1: adhesive tape, 11: adhesive layer, 12: protective film, 12a, 12b ... both ends of protective film in X direction, 21: central slit, 21a, 21b ... central Both ends of slit in X direction, 22 ... end slit, 41 ... first face, 42 ... second face, 50 ... bundle of paper sheets, 50a ... first face, 50b ... second face, 50c ... side part , 51 ... Paper sheets, 61 ... Edge of a bundle of paper sheets, 61a ... Edge of the edge, 110 ... Binding device, 120 ... Bundle creation part, 121 ... First roller (first contact member), 122 ... 2nd roller (2nd contact member), 130 ... Tape mounting part, 141a ... 1st roller (1st biasing member), 142a ... 2nd roller (2nd biasing member).

Embodiments described herein relate generally to an adhesive tape, a paper sheet binding method , a tape peeling method, and a paper sheet binding device.

The problem to be solved by the present invention is to provide an adhesive tape that can be easily removed from an adherend, a paper sheet binding method , a tape peeling method, and a paper sheet binding device using the adhesive tape. It is to be.

Adhesive tape of embodiment has an adhesive layer peelable from the adherend by being stretched in the direction along the surface of the adherend, and a protective film for protecting the adhesive layer. The protective film has a cut extending at least partially in the first direction, and can be stretched in a direction along the surface of the adherend while being adhered to the adhesive layer . Both end portions in the first direction of the cut are disposed inside both end portions in the first direction of the protective film.

Claims (10)

An adhesive layer that is peelable from the adherend by being stretched;
A protective film for protecting the adhesive layer,
The protective film has a first cut at least partially extending in the first direction and can be stretched in a second direction intersecting the first direction;
The both ends of the first cut in the first direction are arranged on the inner side of the both ends of the protective film in the first direction.
Adhesive tape. The protective film has a second cut extending at least partially in the first direction;
The second cut reaches either one of both ends of the protective film in the first direction, and includes a portion aligned with the first cut in the second direction.
The pressure-sensitive adhesive tape according to claim 1. The protective film has a plurality of the first cut and the second cut,
The plurality of first cuts and the plurality of second cuts are alternately arranged in the second direction,
The pressure-sensitive adhesive tape according to claim 2. The protective film has a first surface on the adhesive layer side and a second surface opposite to the first surface;
The first cut is a cut formed on the protective film from the second surface side and does not reach the first surface.
The pressure-sensitive adhesive tape according to any one of claims 1 to 3. By stacking multiple paper sheets, make a bundle of the paper sheets,
The said 2nd direction of the adhesive tape as described in any one of Claims 1-4 is made to cross | intersect the edge of the one edge part of the said bundle, The 1st surface of the said bundle in the said edge part of the said bundle And the second surface of the bundle opposite to the first surface and the side of the bundle between the first surface and the second surface are fastened with the adhesive tape,
How to bind paper sheets. Shifting the plurality of paper sheets in a third direction intersecting the edge to make the bundle,
The paper sheet binding method according to claim 5. A bundle creating unit that stacks a plurality of paper sheets to create a bundle of the paper sheets;
A tape mounting part that attaches an adhesive tape to one edge of the bundle and binds the bundle; and
The tape mounting portion includes, at the edge of the bundle, a first surface of the bundle, a second surface of the bundle opposite to the first surface, and the first surface and the second surface. Attaching the adhesive tape so as to straddle the side of the bundle in between, and binding the bundle
Paper sheet binding device. The bundle creating unit creates the bundle shifted in a third direction in which the plurality of paper sheets intersects the edge of the edge of the bundle.
The paper sheet binding device according to claim 7. The bundle creating unit includes a first contact member that can contact the first surface of the bundle, and a second contact member that can contact the second surface of the bundle,
The outer peripheral surface of the second contact member is formed so as to be more easily deformed along the surface of the bundle than the outer peripheral surface of the first contact member.
The bundle creating unit sandwiches the bundle between the first contact member and the second contact member, and deforms an outer peripheral surface of the second contact member along the second surface of the bundle. In this state, at least one of the first contact member and the second contact member is rotated to send the bundle in the third direction, thereby shifting the plurality of paper sheets in the third direction. ,
The paper sheet binding device according to claim 8. The tape mounting portion includes a first biasing member and a second biasing member,
At least one of the first urging member and the second urging member is urged in a direction contacting the other,
The tape mounting portion arranges the adhesive tape so as to straddle the first urging member and the second urging member, and the edge portion of the bundle together with the adhesive tape and the first urging member and the Insert between the second urging member and attach the adhesive tape to the edge of the bundle,
The paper sheet binding device according to any one of claims 7 to 9.

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