JP6816948B2 - Tape peeling method, paper leaf binding method, paper leaf binding device and adhesive tape - Google Patents

Description

Embodiments of the present invention relate to a tape peeling method, a paper sheet binding method , a paper sheet binding device, and an adhesive tape .

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 off from the adherend by being stretched. On the other hand, the protective film is made of a material that is harder to stretch than the adhesive layer. In this case, even if an attempt is made to stretch the adhesive layer, the protective film may hinder the stretching of the adhesive layer. Therefore, when removing the adhesive tape from the adherend, it may be necessary to first remove the protective film from the adhesive layer.

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

An object to be solved by the present invention is to provide a tape peeling method, a paper leaf binding method , a paper leaf binding device, and an adhesive tape that can be easily removed from an adherend.

The tape peeling method of the embodiment is formed by stacking a plurality of paper sheets using an adhesive tape that can be peeled off from the adherend by being stretched along the surface of the adherend. the flux of the plurality of paper sheets in directions shifted from each other which intersect the edge of the rim at one edge of the bundle of paper sheets, the mounted by intersecting the edge of the edge of the bundle The adhesive tape is stretched along the surface of the adherend.

The cross-sectional view which shows the adhesive tape of 1st Embodiment. The cross-sectional view which shows the use state of the adhesive tape of 1st Embodiment. The plan view which shows the adhesive tape of 1st Embodiment. FIG. 3 is a cross-sectional view taken along line F4-F4 of the adhesive tape shown in FIG. The plan view which shows the stretched state of the protective film of 1st Embodiment. The plan view which shows the binding method of the paper leaf of 1st Embodiment. The cross-sectional view which shows the binding method of the paper leaf of the 1st Embodiment. FIG. 5 is a cross-sectional view showing a modified example of the method for binding paper sheets according to the first embodiment. The plan view which shows the method of removing the paper leaf from the adhesive tape of 1st Embodiment. The plan view which shows the method of removing the paper leaf from the adhesive tape of 1st Embodiment. The cross-sectional view which shows the 1st modification of the adhesive tape of 1st Embodiment. The plan view which shows the 2nd modification of the adhesive tape of 1st Embodiment. The plan view which shows the 3rd modification of the adhesive tape of 1st Embodiment. The plan view which shows the 4th modification of the adhesive tape of 1st Embodiment. The plan view which shows the 5th modification of the adhesive tape of 1st Embodiment. The plan view which shows the 1st reference example of the adhesive tape of 1st Embodiment. The plan view which shows the 2nd reference example of the adhesive tape of 1st Embodiment. The plan view which shows the 3rd reference example of the adhesive tape of 1st Embodiment. The plan view which shows the adhesive tape of the 2nd Embodiment. The plan view which shows the 1st modification of the adhesive tape of 2nd Embodiment. FIG. 2 is a cross-sectional view showing the operation of the first modification of the adhesive tape of the second embodiment. The plan view which shows the 2nd modification of the adhesive tape of 2nd Embodiment. The plan view which shows the 3rd modification of the adhesive tape of 2nd Embodiment. The plan view which shows the 1st reference example of the adhesive tape of 2nd Embodiment. The plan view which shows the 2nd reference example of the adhesive tape of 2nd Embodiment. FIG. 2 is a cross-sectional view showing the adhesive tape of the third embodiment. FIG. 5 is a cross-sectional view showing a modified example of the adhesive tape of the third embodiment. The plan view which shows the adhesive tape of 4th Embodiment. The plan view which shows the adhesive tape of a reference form. The plan view which shows the 1st reference example of the adhesive tape of a reference form. The plan view which shows the 2nd reference example of the adhesive tape of a reference form. The side view which shows the binding apparatus of embodiment. The plan view which shows the main part of the bundle making part of embodiment. The side view which shows the operation of the binding apparatus of embodiment. A side view showing the operation of the binding device of the embodiment following FIG. 34. FIG. 35 is a side view showing the operation of the binding device of the embodiment following FIG. 35. A side view showing the operation of the binding device of the embodiment following FIG. 36. The side view which shows the deviation of the side part of the bundle of an embodiment. A side view showing a first length and a second length of the embodiment. FIG. 37 is a side view showing the operation of the binding device of the embodiment, following FIG. 37. A side view showing the operation of the binding device of the embodiment following FIG. 40. FIG. 41 is a side view showing the operation of the binding device of the embodiment following FIG. 41. FIG. 42 is a side view showing the operation of the binding device of the embodiment following FIG. 42. FIG. 43 is a side view showing the operation of the binding device of the embodiment following FIG. 43. FIG. 44 is a side view showing the operation of the binding device of the embodiment following FIG. 44. FIG. 45 is a side view showing the operation of the binding device of the embodiment following FIG. 45. FIG. 46 is a side view showing the operation of the binding device of the embodiment, following FIG. 46. FIG. 47 is a side view showing the operation of the binding device of the embodiment, following FIG. 47. FIG. 48 is a side view showing the operation of the binding device of the embodiment following FIG. 48. The side view which shows the modification of the bundle making part of an embodiment. The side view which shows the operation of the bundle making part of the modification.

Hereinafter, the method of binding the adhesive tape and the paper sheets of the 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. Then, the duplicate description of those configurations may be 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 the "first direction". The X direction is the width direction of the adhesive tape. The Y direction is an example of the "second direction". The Y direction is the length direction of the adhesive tape. The Y direction is a direction that intersects (for example, substantially orthogonally) 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 orthogonally) the X direction and the Y direction.

(First Embodiment)
The method of binding the adhesive tape 1 and the paper sheets of the first embodiment will be described with reference to FIGS. 1 to 10. FIG. 1 is a cross-sectional view showing 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 the present application, for convenience of explanation, a film that is peeled off to expose the adhesive surface when the adhesive tape 1 is used is referred to as a "release film". On the other hand, a film that protects the adhesive layer 11 even when the adhesive tape 1 is in use is referred to as a "protective film". The names "release film" and "protective film" are given for convenience in order to distinguish between them.
Therefore, these films 12 and 13 may be referred to by different names.
Further, the term "film" as used in the present application is a name given to distinguish it from paper sheets described later. Therefore, the term "film" broadly means a sheet-like member, and the material thereof is not limited to the synthetic resin material. The "film" referred to 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 a usage state of the adhesive tape 1. As shown in FIG. 2, the adhesive tape 1 is used by peeling the release film 13 and then attaching the adhesive layer 11 to the adherend A. More specifically, the adhesive layer 11 has an adhesive surface (mounting surface) 11s. The adhesive surface 11s is adhered to the adherend A. As a result, the adhesive layer 11 is adhered to the adherend A.

Here, the adherend A is not particularly limited. The adherend A widely corresponds to various members such as paper materials, woods, cloth materials, synthetic resin materials, and metal materials. For example, the adherend A is a paper leaf. The term "paper leaf" as used in the present application broadly means a sheet-shaped member. For example, paper sheets are sheet-shaped recording media (hereinafter referred to as sheets) on which an image is printed (or printed). For example, paper leaves are sheets 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 (adhesion surface) of the adherend A. For example, the adhesive layer 11 can be peeled off from the adherend A by being stretched in the Y direction in FIG.

The material of the adhesive layer 11 is not particularly limited. For example, the adhesive layer 11 is formed of Mayclean gel (registered trademark) manufactured by Kyodo Giken Kagaku Co., Ltd. The adhesive layer 11 may be formed of Renesas gel manufactured by Kyodo Giken Kagaku Co., Ltd. The adhesive layer 11 may also be made of the same material as the 3M Company Command (COMMAND)® tabs.

The thickness of the adhesive layer 11 is not particularly 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 to protect the adhesive layer 11. The protective film 12 is laminated on the adhesive layer 11. As a result, the protective film 12 covers the adhesive layer 11. The phrase "the protective film 12 is provided (stacked, covered) on one side of the adhesive layer 11" in the present application is not limited to the case where the protective film 12 is in direct contact with the adhesive layer 11. The phrase "the protective film 12 is provided (stacked, covered) on one side of the adhesive layer 11" includes the case where another member is interposed between the protective film 12 and the adhesive layer 11. An example in which another member is interposed between the protective film 12 and the adhesive layer 11 will be described later as a third embodiment.

The material of the protective film 12 is not particularly limited. For example, the protective film 12 is a sheet made of synthetic resin. In a specific example, the protective film 12 is made of PET (Poly Ethylene Terephthalate). The protective film 12 may be made 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 portion (first side portion, first edge portion) 12a and a second end portion (second side portion, second edge portion) 12b. The first end portion 12a and the second end portion 12b are both ends of the protective film 12 in the X direction.

Further, the protective film 12 has a third end portion 12c and a fourth end portion 12d. The third end portion 12c and the fourth end portion 12d are both ends of the protective film 12 in the Y direction. Here, the 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 cut provided in the protective film 12 will be described.

In the present application, for convenience of explanation, a cut penetrating 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". This embodiment is an example in which a plurality of slits are provided in the protective film 12.

The term "slit" as used in the present application broadly means a penetrating notch provided in the protective film 12. That is, the "slit" referred to in the present application is not limited to a slit having a gap. The "slit" referred to in the present application may be a slit having no void. The “slit having a gap” means that a spatial gap (hole) is formed in a portion where the slit is provided. The "slit having no void" means that a spatial gap is substantially not formed in the portion where the slit is provided (only the cut surface exists). That is, the "slit having no gap" means that two surfaces located on both sides of the slit are in contact with each other so as to close the slit.

As shown in FIG. 3, in the present embodiment, the protective film 12 has a plurality of central slits 21 and a plurality of end slits 22. The central slit 21 is an example of each of the "first slit" and the "first slit". The end slit 22 is an example of each of the "second cut" and the "second slit". Here, the names "center slit" and "end slit" are given for convenience in order to distinguish between them. 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 portion 21a and a second end portion 21b. The first end portion 21a and the second end portion 21b are both ends of the central slit 21 in the X direction. The first end portion 21a and the second end portion 21b of the central slit 21 are arranged inside the both end portions 12a and 12b of the protective film 12 in the X direction. That is, the central slit 21 is separated from both ends 12a and 12b of the protective film 12 in the X direction. Both ends 21a and 21b of the central slit 21 in the X direction do not reach both ends 12a and 12b of the protective film 12 in the X direction.

As a result, the protective film 12 has a first connecting portion (first uncut portion) 31 and a second connecting portion (second uncut portion) 32.
The first connecting portion 31 is located between the first end portion 21a of the central slit 21 and the first end portion 12a of the protective film 12. In the first connection portion 31, the protective film 12 is continuous in the Y direction.
The second connecting portion 32 is located between the second end portion 21b of the central slit 21 and the second end portion 12b of the protective film 12. In the second connection portion 32, the protective film 12 is continuous 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 either the first end 12a or the second end 12b 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 22A of the first group G1 is arranged between the first end 12a of the protective film 12 and the center line C. The end slit 22A reaches the first end 12a 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 22B of the second group G2 is arranged between the second end 12b 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 with each other in the X direction. The end slit 22A and the end slit 22B have substantially the same shape as each other. For example, the end slit 22A and the end slit 22B have substantially the same length as each other.

The end slit 22A and the end slit 22B are separated from each other in the X direction. As a result, the protective film 12 has a third connecting portion (third uncut portion) 33. The third connecting portion 33 is located between the end slit 22A and the end slit 22B. At the third connection portion 33, the protective film 12 is continuous in the Y direction.

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

Next, the shapes 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 the 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 of 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 on the protective film 12 from the second surface 42 side. Then, 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 integrally combined. 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 integrally combined.

FIG. 5 shows a stretched state of the protective film 12. As shown in FIG. 5, the protective film 12 of the present 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 wide near the center line C when the adhesive layer 11 is stretched in the Y direction. However, the central slit 21 does not open very wide near the X-direction ends 12a and 12b of the protective film 12. In other words, the central slit 21 of the protective film 12 opens wider near the center line C than the X-direction ends 12a and 12b of the protective film 12.
On the other hand, the end slit 22 opens wide near the ends 12a and 12b of the protective film 12 in the X direction when the adhesive layer 11 is stretched in the Y direction. However, the end slit 22 does not open very wide near the center line C. In other words, the end slit 22 of the protective film 12 opens wider at the ends 12a and 12b in the X direction than near the center line C.
By alternately arranging the central slit 21 and the end slit 22 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 integrated with the adhesive layer 11 until the adhesive layer 11 is peeled off from the adherend A. The protective film 12 may be peeled from the adhesive layer 11 after being stretched by a certain amount together with the adhesive layer 11 and before the adhesive layer 11 is peeled from the adherend A.

From another viewpoint, the protective film 12 may be stretched together with the adhesive layer 11 by tearing off a part of the protective film 12. For example, as shown in FIG. 5, stress concentration occurs in the first to third connecting portions 31, 32, 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, the protective film 12 may be stretched together with the adhesive layer 11 by tearing off a part or all of these connecting portions 31, 32, 33.

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 11s 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. As a result, 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. The release film 13 may be omitted when the adhesive tape 1 is provided in a roll form.

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 method for binding paper sheets 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 overlapped with each other. As a result, a bundle 50 of paper leaves 51 is made.

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

The first paper leaf 51A is located on the foremost surface (top surface in FIG. 7) of the plurality of paper leaves 51. The first paper leaf 51A forms the cover of the bundle 50 of paper leaves.

The second paper leaf 51B is located on the opposite side of the first paper leaf 51A. That is, the second paper leaf 51B is located on the rearmost surface (lowermost surface in FIG. 7) of the plurality of paper leaves 51. The second paper leaf 51B forms the back cover of the bundle 50 of paper leaves.

The third paper leaf 51C is located between the first paper leaf 51A and the second paper leaf 51B among the plurality of paper leaves 51. The third paper leaf 51C forms an intermediate page of the bundle 50 of paper leaves. The third paper leaf 51C may be one sheet or a plurality of sheets. Further, the third paper leaf type 51C may be omitted.
That is, the bundle 50 of paper leaves may be formed only by the first paper leaves 51A and the second paper leaves 51B.

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

Here, as shown in FIGS. 6 and 7, the bundle of paper leaves 50 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 displaced from each other at the edge portion 61.

In this case, the side portion 50c of the bundle 50 of the paper leaves is shifted from the side surface of the plurality of paper leaves 51 and the adjacent paper leaves 51 so that the paper does not overlap with the adjacent paper leaves 51. It is formed by the surface of leaves 51. That is, the side portion 50c of the bundle of paper leaves 50 is formed in a stepped shape as shown in FIG. In this case, the surface area of the side portion 50c in contact with the adhesive layer 11 increases as compared with the case where the side portion 50c is formed in a straight line.

Next, a method of attaching the adhesive tape 1 to the bundle of paper sheets 50 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 61a of the edge 61 of the bundle 50 of paper sheets. For example, the Y direction of the adhesive tape 1 is made substantially orthogonal to the edge 61a 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 50a, the second surface 50b, and the side portion 50c of the bundle 50 are fastened with the adhesive tape 1. That is, the adhesive tape 1 is adhered 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 of paper sheets 50 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 adhered to the edge 61 of the bundle of paper sheets 50. In the present embodiment, at the edge 61 of the bundle 50 of paper leaves, the plurality of paper leaves 51 are shifted from each other. The adhesive tape 1 is attached to the side portion 50c of the bundle 50 of paper sheets formed in a staircase pattern. As a result, in the binding method of the present embodiment, the adhesive area between the third paper leaf 51C and the adhesive tape 1 can be increased.

Note that FIG. 8 shows a modified example of the method for binding paper sheets according to the present embodiment. As shown in FIG. 8, the side portion 50c of the bundle of paper sheets 50 may be arranged in a straight line. That is, at the edge 61 of the bundle 50 of paper leaves, the plurality of paper leaves 51 may not be displaced from each other. Even in such a configuration, a plurality of paper sheets 51 can be bound by the adhesive tape 1.

Next, a method of removing the adhesive tape 1 will be described.
First, the third paper leaf 51C is removed from the adhesive tape 1.
FIG. 9 shows a method of removing the third paper leaf 51C from the adhesive tape 1. As shown in FIG. 9, first, the first paper leaves 51A and the second paper leaves 51B are opened wide. Then, the third paper leaf 51C is removed from between the first paper leaf 51A and the second paper leaf 51B. Here, the adhesive area between the third paper leaf 51C and the adhesive tape 1 is smaller than the adhesive area between the first paper leaf 51A or the second paper leaf 51B and the adhesive tape 1. Therefore, when the third paper leaf 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 intersecting the X and Y directions), the adhesive tape 1 to the third paper leaf The 51C can be easily removed.
Before removing the third paper leaf 51C from the adhesive tape 1 (or at the same time as the removal work), the first paper leaf 51A and the second paper leaf 51B are pulled so as to stretch the adhesive tape 1 in the Y direction. You may. 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 becomes smaller. This makes it easier to remove the third paper leaf 51C from the adhesive tape 1.

Next, the first paper leaves 51A and the second paper leaves 51B are removed from the adhesive tape 1.
FIG. 10 shows a method of removing the first paper leaves 51A and the second paper leaves 51B from the adhesive tape 1. In FIG. 10, for convenience of explanation, one adhesive tape 1 is schematically enlarged. As shown in FIG. 10, with the first paper leaf 51A and the second paper leaf 51B open, the adhesive tape 1 is pressed with a finger. Then, the first paper leaves 51A and the second paper leaves 51B are pulled outward simultaneously or sequentially with respect to the adhesive tape 1. As a result, the adhesive layer 11 is stretched in the Y direction. At this time, in the adhesive tape 1 of the present embodiment, the 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 leaves 51A and the second paper leaves 51B, the adhesive layer 11 is peeled off from the first paper leaves 51A and the second paper leaves 51B. As a result, the first paper leaves 51A and the second paper leaves 51B 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 leaves 51A and the second paper leaves 51B gradually decreases. As a result, the adhesive layer 11 can be peeled off from the first paper leaves 51A and the second paper leaves 51B without damaging the surfaces of the first paper leaves 51A and the second paper leaves 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 comparison, consider the case where the protective film is formed of a material that is harder to stretch than the adhesive layer. In this case, even if an attempt is made to stretch the adhesive layer, the protective film may hinder the stretching of the adhesive layer. Therefore, when removing the adhesive tape from the adherend, it may be necessary to first remove the protective film from the adhesive layer. The work of removing the protective film from the adhesive layer first tends to be complicated. Therefore, the adhesive tape as described above has room for improvement from the viewpoint of convenience.

Therefore, the adhesive tape 1 of the present embodiment includes an adhesive layer 11 that can be peeled off from the adherend A by being stretched, and a protective film 12 that protects the adhesive layer 11. 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 intersecting 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. This eliminates the need to remove the protective film 12 from the adhesive layer 11 first. That is, it is possible to omit the complicated work of removing the protective film 12 from the adhesive layer 11 first. As a result, the convenience of the user 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 leaves 51 is suddenly stretched, the paper leaves 51 may fall apart.

Here, if a slit reaching either of both ends 12a and 12b of the protective film 12 in the X direction is provided, the strength of the protective film 12 in the Y direction tends to decrease. The reason is that when the slit reaching the end of the protective film 12 is provided, the protective film 12 receives the force in the Y direction only in the region located on one side of the slit in the X direction. Therefore, the force in the Y direction tends to be concentrated on a specific region of the protective film 12. Therefore, the strength of the protective film 12 in the Y direction tends to decrease.

On the other hand, in the present embodiment, both end portions 21a and 21b of the central slit 21 in the X direction are arranged inside the end portions 12a and 12b of the protective film 12 in the X direction. According to such a configuration, the protective film 12 can receive a force in the Y direction in a plurality of regions (first and second connecting portions 31, 32) located on both sides of the slit in the X direction. Therefore, it is difficult for the force in the Y direction to concentrate on a specific region of the protective film 12. Therefore, the strength of the protective film 12 in the Y direction is unlikely to decrease. As a result, the adhesive tape 1 of the present embodiment can secure a certain strength in addition to the stretchability in the Y direction. Even in this case, when the adhesive tape 1 is removed, the adhesive tape 1 can be reliably stretched by strongly pulling the adhesive tape 1 and tearing off a part or all of the connecting portions 31 and 32.

In this 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 of both ends 12a and 12b of the protective film 12 in the X direction. The end slit 22 includes a portion R1 aligned with the central slit 21 in the Y direction.
According to such a configuration, the region between the central slit 21 and the end slit 22 is deformed obliquely with respect to the X direction when the protective film 12 is stretched (see, for example, FIG. 5). Therefore, according to the above configuration, the protective film 12 is more easily extended in the Y direction as compared with the case where only the central slit 21 is provided or only the end slit 22 is provided. Furthermore, by having both the central slit 21 and the end slit 22, it is possible to provide the adhesive tape 1 having both strength and stretchability in the Y direction.

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

On the other hand, the protective film 12 of the present embodiment has a plurality of central slits 21 and a plurality of end slits 22. The plurality of central slits 21 and the plurality of end slits 22 are arranged alternately in the Y direction. According to such a configuration, the protective film 12 can be extended in a chain shape as described above by opening the central slits 21 and the end slits 22 which are arranged alternately. Therefore, even if the connecting portions 31, 32, and 33 are not torn off, substantially the entire protective film 12 is stretched evenly. Therefore, the protective film 12 can be greatly stretched even with a relatively weak force as compared with the above two comparative examples. This enhances user convenience.

In recent years, in order to promote the reuse (reuse and regeneration) of paper leaves, there has been a demand for a method of binding paper leaves without using metal staples.
Therefore, in the method of binding paper leaves of the present embodiment, first, a bundle of paper leaves 50 is formed by stacking a plurality of paper leaves 51. Then, the Y direction of the adhesive tape 1 is crossed with the edge 61a of the edge 61 of the bundle 50 of the paper leaves. Then, at the edge 61 of the bundle 50 of paper sheets, the first surface 50a, the second surface 50b, and the side portion 50c 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.
Further, the adhesive tape 1 can be easily removed from the paper sheets 51 without damaging the paper sheets 51. Therefore, the reuse of the paper leaves 51 can be promoted.

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

Therefore, in the binding method of the present embodiment, the plurality of paper leaves 51 are shifted from each other at the edge 61 of the bundle of paper leaves 50. As a result, the adhesive area between each third paper leaf 51C and the adhesive tape 1 can be increased. As a result, the intermediate page of the bundle of paper sheets 50 can be firmly held by the adhesive tape 1.

Next, a first modification of the adhesive tape 1 of the present embodiment will be described.
In this modification, the depth of the cut provided in the protective film 12 is different from that in the first embodiment. The other configurations of this modification are the same as the configurations of the first embodiment. Therefore, the description of the same part as that of the first embodiment will be 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 term "groove" as used in the present application broadly means a non-penetrating notch provided in the protective film 12. That is, the "groove" referred to in the present application is not limited to the groove having a void. The "groove" referred to in the present application may be a groove having no void. The "groove having a gap" means that a spatial gap (recess) is formed in a portion where the groove is provided. The "groove having no void" means that a spatial gap is substantially not formed in the portion where the groove is provided (only the cut surface exists). That is, the "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 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 the "second cut" and the "second groove". Here, the names "central groove" and "end groove" are given for convenience in order to distinguish between them. Therefore, these names do not particularly limit the shape and configuration of these grooves.

The central groove 65 is different 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 differs 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 on 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.

Therefore, at the boundary between the adhesive layer 11 and the protective film 12, the protective film 12 is continuous in the Y direction beyond the plurality of grooves 65 and 66. For example, the protective film 12 is continuous over the entire length in the Y direction.

In other words, the protective film 12 has a fourth connecting portion (fourth uncut portion) 34 between the central groove 65 and the end groove 66 and the adhesive layer 11. At the fourth connection portion 34, the protective film 12 is continuous in the Y direction. The fourth connection portion 34 may be torn off when the adhesive layer 11 is stretched, as in the case of the first to third connection portions 31, 32, 33.

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. Therefore, the surface of the adhesive tape 1 is prevented from becoming sticky. Therefore, the convenience of the user can be further enhanced. In all the embodiments, modifications, reference examples, and reference embodiments described below, each slit may be a groove as in the present modification.

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

FIG. 12 is a plan view showing the adhesive tape 1 of the 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. The number of the central slit 21 may be only one.

Even in such a configuration, the protective film 12 can be stretched together with the adhesive layer 11 by tearing off the first and second connecting portions 31 and 32. Further, according to such a configuration, it is easy to secure the strength of the protective film 12 in the Y direction as in the first embodiment.

FIG. 13 is a plan view showing the adhesive tape 1 of the 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 arranged between the plurality of end slits 71 in the Y direction.

Here, the name "end slit" is given for convenience in order to distinguish this 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 the "second cut" and the "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 either the first end 12a or the second end 12b of the protective film 12 in the X direction.

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 of 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 wide in the Y direction. Therefore, the protective film 12 is easily stretched in the Y direction.

According to such a configuration, the protective film 12 is further easily stretched in the Y direction by providing the end slit 71. Further, since the protective film 12 is provided with the central slit 21, it becomes easy to secure the strength of the protective film 12 in the Y direction.

FIG. 14 is a plan view showing the adhesive tape 1 of the fourth modified example. 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 arranged 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 configuration, it is possible to secure a large amount of the first and second connecting portions 31 and 32 as compared with the third modification. Therefore, it becomes easier to secure the strength of the protective film 12 in the Y direction as compared with the third modification.

FIG. 15 is a plan view showing the adhesive tape 1 of the fifth modification. As shown in FIG. 15, the protective film 12 of this modification has one broken line slit 73 and a plurality of end slits 71. The broken line slit 73 is arranged 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 this 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, since the broken line slit 73 is divided into a plurality of slit pieces 73a, it becomes easier to further 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 both ends 12a and 12b of the protective film 12 in the X direction. 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 stretched in the Y direction. The total width slit 75 may be only one.

Here, depending on the material forming the protective film 12, the protective film 12 may be difficult to bend in the Z direction.
On the other hand, when the protective film 12 is provided with the full-width slit 75, the protective film 12 is easily bent in the Z direction at the position where the full-width slit 75 is provided. Therefore, according to the above configuration, when the adhesive tape 1 is attached to the corners of the adherend A, the followability of the adhesive tape 1 to the corners can be improved. Therefore, the adhesive strength of the adhesive tape 1 to the adherend A can be increased. Further, if the adhesive tape 1 can be deformed following the corners of the adherend A, the appearance of the adhesive tape 1 when used 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 substantially the 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 that reaches both both ends 12a and 12b of the protective film 12 in the X direction.

Here, when the protective film 12 is provided with the full-width slit 75, the protective film 12 is divided into a plurality of pieces in the Y direction.
On the other hand, if 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. Therefore, according to the adhesive tape 1 provided with the full-width groove 76, it becomes easy to secure the strength of the protective film 12 in the Y direction while improving the followability of the adhesive tape 1 to the corners of the adherend 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 configuration, the followability of the adhesive tape 1 to the corners of the adherend A can be improved. The protective film 12 may have a full-width groove 76 instead of the full-width slit 75.

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

(Second Embodiment)
Next, the adhesive tape 1 of the second embodiment will be described.
The present embodiment is different from the first embodiment in that the protective film 12 has a wide interval between some slits. The other configurations of the present embodiment are the same as the configurations of the first embodiment. Therefore, the description of the same part as that of the first embodiment will be omitted.

FIG. 19 is a plan view showing the adhesive tape 1 of 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 region 81 is a region to be adhered to the first paper leaf 51A. The second region 82 is a region to be adhered to the second paper leaf 51B. The third region 83 is located between the first region 81 and the second region 82. The third region 83 is a region adhered to the side portion 50c of the bundle of paper sheets 50. For example, the first region 83 is a region to be adhered to the third paper leaf 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 configuration, the adhesive strength of the adhesive tape 1 to the bundle of paper sheets 50 can be increased. That is, the third region 83 of the protective film 12 is a region adhered to the side portion 50c of the bundle 50 of paper sheets. In the third region 83, the adhesive area to each paper leaf 51 tends to be smaller than that in the first region 81 or the second region 82.

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

Therefore, in the present embodiment, the slit is not 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 of paper sheets 50. Therefore, the third region 83 of the protective film 12 is easily attached to the side portion 50c of the bundle of paper sheets 50 while maintaining a relatively high adhesive force. Therefore, the adhesive strength of the third region 83 with respect to the side portion 50c of the bundle 50 of paper leaves can be increased. As a result, the adhesive strength of the adhesive tape 1 to the bundle of paper sheets 50 can be increased.

Next, some modifications and reference examples of the adhesive tape 1 of the second embodiment will be described. In these modifications 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 modifications and reference examples are the same as those of the second embodiment. Therefore, the description of the same part as that of the second embodiment will be 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. The total width groove 76 may be one.

Here, the action of the full-width groove 76 provided in the third region 83 of the protective film 12 will be described. FIG. 21 is a cross-sectional view showing the action of the adhesive tape 1 of this modified example. (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 50c of the bundle of paper sheets 50. It can be difficult to follow. This is because the protective film 12 has a certain hardness, so that the protective film 12 is hard to bend.

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. Therefore, the third region 83 of the adhesive tape 1 can be easily aligned with the side portion 50c of the bundle of paper sheets 50. As a result, the adhesive strength of the adhesive tape 1 to the bundle of paper sheets 50 can be further increased.

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 with such a configuration, the third region 83 of the adhesive tape 1 can be easily aligned with the side portion 50c of the bundle of paper sheets 50.
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 unlikely to be unexpectedly extended as in the second embodiment. Therefore, the adhesive strength of the adhesive tape 1 to the bundle of paper sheets 50 is unlikely to decrease.

FIG. 22 is a plan view showing the adhesive tape 1 of the second modification. As shown in FIG. 22, in the protective film 12 of the second embodiment, the protective film 12 of this reference example includes one broken line slit 73 and a plurality of end portions instead of providing the central slit 21 and the end slit 22. It is provided with 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 more likely to bend in the third region 83 than in the case where the protective film 12 does not have the broken line slit 73. Therefore, the third region 83 of the protective film 12 can be easily aligned with the side portion 50c of the bundle of paper sheets 50. If the slit provided in the third region 83 of the protective film 12 is the broken line slit 73, the third region 83 is unlikely to be stretched unexpectedly. Therefore, the adhesive strength of the third region 83 with respect to the side portion 50c of the bundle 50 of paper leaves can be increased. The protective film 12 may have slits or grooves having other shapes instead of the broken line slits 73.

FIG. 23 is a plan view showing the adhesive tape 1 of the third modification. As shown in FIG. 23, the protective film 12 of the present modification is the protective film 12 of the second embodiment, instead of having the central slit 21 and the end slit 22, the two central slits 21 and the plurality of ends. It is provided with a slit 71.
The two central slits 21 are arranged 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 the strength in the Y direction can be easily secured.

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 this reference example includes one full-width slit 75 instead of 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. Therefore, the adhesive tape 1 can be easily aligned with the side portion 50c of the bundle of paper sheets 50. The full-width slit 75 may have a full-width width of 76. In this case, it becomes easy to secure the strength of the protective film 12 in the Y direction.

Even with the adhesive tapes 1 of the first to third modifications and the first and second reference examples of the second embodiment as described above, since the protective film 12 includes the third region 83, the paper leaves The adhesive strength of the adhesive tape 1 to the bundle 50 can be increased.

(Third Embodiment)
Next, the adhesive tape 1 of the third embodiment will be described.
The present 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. The other configurations of the present embodiment are the same as the configurations of the first embodiment. Therefore, the description of the same part as that of the first embodiment will be omitted. In the following, the "adhesive layer 11" will be referred to as a "first adhesive layer 11", and the "adhesive layer 91" will be referred to as a "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 larger adhesive force than the first adhesive layer 11. Therefore, the adhesive force between the protective film 12 and the first adhesive layer 11 is larger 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 in the same manner as 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 detached from the first adhesive layer 11 before the first adhesive layer 11 is peeled from the adherend A. Can be suppressed. As a result, it is possible to prevent the entire first adhesive layer 11 from being exposed to the outside until the removal of the adhesive tape 1 is completed. As a result, it is possible to prevent the first adhesive layer 11 from sticking to other members. As a result, the convenience of the user can be improved.

Next, one modification of the adhesive tape 1 of the third embodiment will be described.
In this modification, the adhesive strength of the second adhesive layer is different from that of the third embodiment. The other configurations of this modification are the same as the configurations of the third embodiment. Therefore, the description of the same part as that of the third embodiment will be omitted.

FIG. 27 is a cross-sectional view showing the adhesive tape 1 of one modified example. 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 smaller adhesive force than the first adhesive layer 11. Therefore, 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 in the same manner as 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 likely to come off from the first adhesive layer 11. When the protective film 12 is removed from the first adhesive layer 11, the protective film 12 does not get in the way when the first adhesive layer 11 is stretched. Therefore, the detachability of the adhesive tape 1 is further improved.

(Fourth Embodiment)
Next, the adhesive tape 1 of the fourth embodiment will be described.
The present embodiment is different from the second embodiment in that the adhesive strength of the adhesive layer 11 is partially different. The other configurations of the present embodiment are the same as the configurations of the second embodiment. Therefore, the description of the same parts as those of the first and second embodiments will be 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 has a first adhesive portion 11a, a second adhesive portion 11b, and a third adhesive portion 11c. The first adhesive portion 11a is provided in the first region 81 of the protective film 12. The first adhesive portion 11a is adhered to the first paper leaf 51A. The second adhesive portion 11b is provided in the second region 82 of the protective film 12. The second adhesive portion 11b is adhered to the second paper leaf 51B.
The third adhesive portion 11c is provided in the third region 83 of the protective film 12. The third adhesive portion 11c is adhered to the third paper leaf 51C.

The adhesive strengths of the first adhesive portion 11a and the second adhesive portion 11b are substantially the same as each other. On the other hand, the third adhesive portion 11c is formed of a material having a higher adhesive strength than the first adhesive portion 11a and the second adhesive portion 11b. According to such a configuration, the third paper leaf 51C 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 with such a configuration, the adhesive strength of the third adhesive portion 11c is higher than the adhesive strength of the first adhesive portion 11a or the second adhesive portion 11b, so that the third paper leaf 51C can be held more reliably. ..
(Reference form)
Next, the adhesive tape 1 in the reference form will be described.
This reference embodiment is different from the first embodiment in that a plurality of holes 101 are provided instead of the slits. The other configurations of this reference embodiment are the same as the configurations of the first embodiment. Therefore, the description of the same part as that of the first embodiment will be omitted.

FIG. 29 is a plan view showing the adhesive tape 1 of the present reference embodiment. As shown in FIG. 29, the protective film 12 of the present reference 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 (recess) 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 circular shape. The shape of the hole 101 may be a polygon such as a triangle or a quadrangle, or may be another shape.

With such an adhesive tape 1, the adhesive layer 11 and the protective film 12 can be stretched together. This makes it possible to provide the adhesive tape 1 that can be easily peeled off from the adherend A.

Next, the first and second reference examples of the adhesive tape 1 of the reference form will be described.
In the first reference example, the position where the hole 101 is provided is different from the above reference form. The second reference example differs 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 above reference form. Therefore, the description of the first and second embodiments and the same parts as those in the above reference embodiment will be 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 this reference example has the first to third regions 81, 82, 83, similarly to the protective film 12 of the second embodiment. The holes 101 are 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, the adhesive strength of the adhesive tape 1 to the bundle of paper sheets 50 can be increased as in the second embodiment.

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, as in the second reference example of the second embodiment, the third region 83 of the protective film 12 can be easily aligned with the side portion 50c of the bundle of paper sheets 50.

The first to fourth embodiments, one reference embodiment, and the configurations relating to the modified examples and the reference examples have been described above. However, the configurations of the respective embodiments, the reference embodiments, the modified examples, and the reference examples are described. It is not limited to the above example. Those configurations are applicable in combination with each other.

Hereinafter, the paper sheet binding device of the 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. Then, the duplicate description of those configurations may be omitted.

The binding device 110 for the paper sheets 51 of the embodiment will be described with reference to FIGS. 32 and 33. FIG. 32 is a side view showing the binding device 110 of the embodiment. FIG. 33 is a plan view showing a main part of the bundle creating unit 120 of the embodiment.
As shown in FIG. 32, the binding device 110 includes a bundle making section 120 and a tape mounting section 130.

First, the bundle creating unit 120 will be described.
As shown in FIG. 32, the bundle making unit 120 stacks a plurality of paper leaves 51 to form a bundle 50 of the paper leaves 51 (see FIG. 34). 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 the "first contact member" according to the claim. The second roller 122 corresponds to the "second contact member" described in claim.

The shape of the first roller 121 is a columnar shape extending in the X direction. The first roller 121 comes into contact with 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 121a 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. Normally, the rotary 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 the frame inside the binding device 110 (hereinafter referred to as “device frame”). The first roller 121 is arranged so 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 projects toward the sub guide 124 from the main guide 123 to the extent that a part of the outer peripheral surface abuts on 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 come into contact with the second surface 50b (see FIG. 34) of the bundle 50. The second shaft 122a extends along the central axis of the second roller 122. The second shaft 122a extends along the first shaft 121a. A plurality of the second rollers 122 (four in the embodiment) are arranged in the direction along the second shaft 122a. When viewed from the Z direction, each second roller 122 overlaps with each first roller 121.

A drive mechanism (not shown) allows the second roller 122 to be brought into contact with and detached from the first roller 121 in the Z direction. The second roller 122 rotates according to the rotation of the first roller 121. When the second roller 122 comes into contact with the second surface 50b (see FIG. 34) of the bundle 50, the second roller 122 is arranged so that a part of the outer peripheral surface is located closer to the main guide 123 than the sub guide 124 in the Z direction. To.

As shown in FIG. 36, the outer peripheral surface 122f of the second roller 122 is formed so as to be more easily deformed along the surface of the bundle 50 than the outer peripheral surface 121f 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 made of sponge. The second roller 122 may be made of rubber having a cavity inside.

As shown in FIG. 32, the main guide 123 guides the paper sheets 51. The main guide 123 can load 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 is inclined and extends so as to be separated from the paper sheets 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 is inclined and extends 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 side of the main guide plate 123a.

As shown in FIG. 33, the shape of the other end of the main guide 123 when viewed from the Z direction is comb-shaped. An extending portion 123b extending in the Y direction is provided at the other end of the main guide 123. A plurality (five in the embodiment) of the extending portions 123b are arranged at intervals in the X direction. A first roller 121 is arranged 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 arranged at intervals in the Z direction from the main guide plate 123a. The distance between the sub guide plate 124a and the main guide plate 123a 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 is inclined and extends so as to be separated from the paper sheets 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 is inclined and extends toward the side opposite to the first sub-guide piece 124c so as to be separated from the paper sheets 51 (bundle 50).

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

The stopper 125 is arranged 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 is a sub-guide 124 from the surface of the main guide plate 123a in the Z direction so as to bring the ends of the conveyed paper sheets 51 into contact with each other to block the plurality of paper sheets 51. It is configured to be movable to a position close to (see FIG. 34). Further, the stopper 125 can be moved 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. It is configured (see FIG. 35).

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

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

The unwinding portion 131 holds the original roll 131R around which the strip-shaped adhesive tape 1 is wound. In the original roll 131R, the adhesive tape 1 is wound so that the release film 13 is arranged on the outside and the protective film 12 is arranged on the inside. The unwinding portion 131 unwinds the adhesive tape 1 along the length direction of the adhesive tape 1.

The transport unit 132 transports the adhesive tape 1 unwound from the unwinding unit 131 along the length direction of the adhesive tape 1. The transport unit 132 includes a pair of transport rollers 132a and 132b. The pair of transport rollers 132a and 132b face each other with the adhesive tape 1 interposed therebetween.

The separating member 133 is a triangular columnar 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 (the length in the X direction). The release film 13 separated from the adhesive tape 1 is wound around the separation member 133.

The take-up portion 134 winds up the release film 13 separated from the adhesive tape 1 in the separation member 133. The take-up portion 134 holds the release roll 134R around which the strip-shaped release film 13 is wound.

The guide base 135 guides the adhesive tape 1 from which the release film 13 is separated. The guide base 135 supports the adhesive tape 1 from the side of the protective film 12 when the adhesive tape 1 is held or cut. The guide base 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 is inclined and 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 is inclined and extends toward the side opposite to the first guide piece 135c so as to be separated from the adhesive tape 1.

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

The first holding member 136a holds one end side of the adhesive tape 1. The second holding member 136b holds the other end side of the adhesive tape 1. The first holding member 136a and the second holding member 136b are triangular columnar members extending in the X direction. The length of the first holding member 136a and the second holding member 136b in the X direction is 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 136c is arranged outside the adhesive tape 1 in the width direction. That is, when viewed from the Y direction, the connecting member 136c does not overlap with the adhesive tape 1. 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 with each other. That is, when viewed from the Y direction, the connecting member 136c does not overlap with the bundle 50.

The tape holding portion 136 is configured to be movable in the Z direction and the Y direction by a moving mechanism (not shown). Specifically, the tape holding portion 136 is configured to be movable between the guide base 135 and the tape wrapping portion 140 in the Z direction. Further, the tape holding portion 136 is configured so as to be close to or separated from the guide base 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 single-wafer-shaped adhesive tape 1. The cutter 137 is located closer to the bundle making portion 120 in the guide base 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 shaft of the cutting blade 137a. For example, the cutter 137 is a rotary cutter. By a drive mechanism (not shown), the cutting blade 137a is configured to be rotatable around the support shaft 137b together with the support shaft 137b.

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

The tape wrapping portion 140 is arranged next to the guide base 135 in the Z direction. Specifically, the tape wrapping portion 140 is arranged on the side opposite to the conveying portion 132 with the guide base 135 in the Z direction. The tape wrapping portion 140 includes a first urging portion 141 and a second urging portion 142.

The first urging portion 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 arranged on the opposite side of the guide base 135 with the first urging portion 141 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 in which 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 springs 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 configurations as the first roller 141a, the first shaft 141b, the first arm 141c, and the first spring 141d described above. Therefore, detailed description will be omitted.

In the present embodiment, the first roller 141a and the second roller 142a are urged in a direction of contact with each other. The first roller 141a corresponds to the "first urging member" described in claim. The second roller 142a corresponds to the "second urging member" described in claim.

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

First, as shown in FIG. 34, a plurality of paper leaves 51 are superposed on each other to form a bundle 50 of the paper leaves 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 making unit 120, and are sequentially abutted against the stopper 125 one by one. Then, a plurality of paper sheets 51 are laminated on the main guide 123 with the end portions of the paper leaves 51 in contact with the stopper 125. As a result, a bundle 50 of paper sheets 51 having the side portions 50c formed in a straight line is obtained.

Next, as shown in FIG. 35, the stopper 125 is released. Specifically, the stopper 125 is moved to the side opposite to the sub guide plate 124a with the main guide plate 123a interposed therebetween. That is, the stopper 125 moves 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 pressed against the first roller 121 with the bundle 50 sandwiched between the first roller 121 and the second roller 122. As described above, the outer peripheral surface 122f of the second roller 122 is more easily deformed along the surface of the bundle 50 than the outer peripheral surface 121f of the first roller 121. Therefore, the portion of the bundle 50 sandwiched between the first roller 121 and the second roller 122 bends along the outer peripheral surface 121f of the first roller 121. In addition, the outer peripheral surface 122f of the second roller 122 is deformed along the second surface 50b of the bundle 50. That is, the outer peripheral surface 122f of the second roller 122 is curved and recessed in the radial direction of the second roller 122 along the outer peripheral surface 121f of the first roller 121.

Next, as shown in FIGS. 37 and 38, the side portion 50c of the bundle 50 is formed in a stepped manner. Specifically, first, the transfer path is switched from the first transfer direction to the second transfer direction by switching the switching member 126. Next, 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, the first roller 121 is actively rotated (normally rotated) in the direction of the arrow V1. Along with this, the second roller 122 rotates (forward) in the direction of arrow V2. Then, the bundle 50 is sent out in the third direction W intersecting the edge 61a (see FIG. 6), so that the plurality of paper sheets 51 are shifted in the third direction W. Specifically, a plurality of papers are formed so that the paper sheets 51 on the second surface 50b side extend forward toward the tape mounting portion 130 (see FIG. 32) with respect to the paper leaves 51 on the first surface 50a side. The leaves 51 are shifted in the third direction W.

Hereinafter, the principle that the side portion 50c of the bundle 50 is stepped will be described.
As described above, when the second roller 122 is pressed against the first roller 121 via the bundle 50, the outer peripheral surface 122f of the second roller 122 is aligned with the outer peripheral surface 121f of the first roller 121. Curves and dents inward in the radial direction of. Hereinafter, the length (arc length) d1 in the circumferential direction of the portion of the outer peripheral surface 121f of the first roller 121 in contact with the first surface 50a of the bundle 50 is referred to as "first length d1". The length d2 of the outer peripheral surface 122f of the second roller 122 in the direction along the circumferential direction of the first roller 121 of the portion (recessed portion) of the bundle 50 in contact with the second surface 50b is referred to as “second length d2”. That is. As the thickness t of the bundle 50 becomes thicker, the second length d2 becomes longer than the first length d1.

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, and the first roller 121 and the second roller 121 and the second roller 122 are deformed. The roller 122 is rotated in the normal direction, and the bundle 50 is sent out in the third direction W. Then, the moving distance of the outer peripheral surface 122f of the second roller 122 becomes longer than the moving distance of the outer peripheral surface 121f of the first roller 121. That is, the feed amount of the bundle 50 in the third direction W becomes larger toward the side of the second surface 50b. Therefore, in the side portion 50c of the bundle 50, the paper leaves 51 on the second surface 50b side extend ahead toward the tape mounting portion 130 (see FIG. 32) with respect to the paper leaves 51 on the first surface 50a side. It becomes a staircase.

Here, the amount of deviation between the first surface 50a and the second surface 50b on the side portion 50c of the bundle 50 is "d", the thickness of the bundle 50 is "t", and 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 rotation speed of the first roller 121 is "n", the following equation is obtained. (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 equations (1) to (4), the following equation (5) can be obtained.
d = 2 × π × t × n ・ ・ ・ (5)

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

Next, as shown in FIG. 40, the second roller 122 is separated from the first roller 121. Specifically, the second roller 122 is separated from the first roller 121 with the bundle 50 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. By separating the second roller 122 from the first roller 121 with the bundle 50 sandwiched between the first roller 121 and the second roller 122, the outer peripheral surface 122f of the second roller 122 is recessed (see FIG. 37). ) Is eliminated. 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 its original shape.

Next, as shown in FIG. 41, the first roller 121 is actively rotated (reversed) in the direction of 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 (reversed) 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 shown in FIG. 42, the transfer path is switched from the second transfer direction to the first transfer direction by switching the switching member 126. Then, the first roller 121 and the second roller 122 are rotated in the normal direction 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 portion 130 (see FIG. 32, specifically, the tape wrapping portion 140).

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

First, as shown in FIG. 43, the adhesive tape 1 is preliminarily unwound from the unwinding portion 131 along the length direction of the adhesive tape 1. In this state, the tape holding portion 136 is moved to the side of the guide base 135. That is, the adhesive tape 1 is supported by the tape holding portion 136 while maintaining the posture of the adhesive tape 1.

Next, as shown in FIG. 44, the tape holding portion 136 is moved to the side of the tape wrapping portion 140. The tape holding portion 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 while holding the posture of the adhesive tape 1 flat.

Next, as shown in FIG. 45, the strip-shaped adhesive tape 1 is cut by the cutter 137 to form the single-wafer-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 together with the adhesive tape 1 between the first roller 141a and the second roller 142a. .. Then, as shown in FIG. 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 the direction of contact with 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 aligned with 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 61 of the bundle 50 is slipped together with the adhesive tape 1 between the first roller 141a and the second roller 142a. 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 creation unit 120 (see FIG. 32), and the bundle 50 to which the adhesive tape 1 is attached is placed between the first roller 121 and the second roller 122. Take out from. After that, the tape holding portion 136 is moved to the side of the guide base 135. Then, while the posture of the adhesive tape 1 is held by the tape holding unit 136, the adhesive tape 1 is pulled out and waits until the next binding processing operation. In other words, the tape mounting portion 130 returns to the state shown in FIG. 43.

Then, as shown in 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 to which the adhesive tape 1 is attached is returned to a predetermined position.

After that, the bundle 50 to which the adhesive tape 1 is attached is discharged to a discharge unit (not shown). 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 a post-treatment such as a punching process (punching process).

By the way, conventionally, as a binding device, a stapler of a metal needle has been the mainstream. In recent years, as a binding device, a pressure type device has also been developed in which paper leaves 51 are processed into a tooth shape by pressure and the processed paper leaves 51 are temporarily fixed to each other. Since all of the binding devices require a large force during the binding operation of the paper sheets 51, it is common to adopt a motor drive such as a DC motor for electrification. However, any of the binding devices may cause problems such as an increase in power consumption of the motor and noise generation during the binding operation. Further, in the pressure type device, there is a possibility that only a few sheets of paper sheets 51 can be bound. Further, since the processed paper leaves 51 are temporarily fixed to each other, the binding strength may not be sufficient even in the state where the paper leaves 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 creating unit 120 stacks a plurality of paper leaves 51 to form a bundle 50 of the paper leaves 51. The tape mounting portion 130 attaches the adhesive tape 1 to the edge portion 61 of the bundle 50 so as to straddle the first surface 50a, the second surface 50b, and the side portion 50c of the bundle 50, and binds the bundle 50. With the above configuration, the following effects are obtained. The force required by the binding device 110 during the binding operation is small. 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 of paper leaves 51 bound can be increased.

The bundle creating unit 120 exerts the following effects by forming a bundle 50 in which a plurality of paper sheets 51 are displaced in the third direction W intersecting the edge 61a. The surface area of the side portion 50c in contact with the adhesive layer 11 can be increased as compared with the case where the side portion 50c is formed linearly. Here, as shown in FIG. 7, the adhesive strength between the third paper leaf 51C and the adhesive tape 1 is the adhesion between the first paper leaf 51A or the second paper leaf 51B and the adhesive tape 1. It tends to be smaller than its strength. However, according to the embodiment, since the plurality of paper leaves 51 are displaced from each other at the edge 61 of the bundle 50 of the paper leaves 51, the adhesive area between each third paper leaf 51C and the adhesive tape 1 is increased. Can be done. Therefore, the intermediate page of the bundle 50 of the paper sheets 51 can be firmly held by the adhesive tape 1. From another viewpoint, when the user performs the process of removing the bundle 50, the adhesive layer 11 is formed by pulling the first paper leaves 51A and the second paper leaves 51B so as to stretch the adhesive tape 1 in the Y direction. It is stretched and the contact area between the third paper leaf 51C and the adhesive layer 11 becomes smaller. As a result, the third paper leaf 51C can be easily removed from the adhesive tape 1 without damaging the paper leaves 51.

The bundle creating unit 120 includes a first roller 121 and a second roller 122. The first roller 121 comes into contact with the first surface 50a of the bundle 50. The second roller 122 can come into contact with the second surface 50b of the bundle 50. The outer peripheral surface 122f of the second roller 122 is formed so as to be more easily deformed along the surface of the bundle 50 than the outer peripheral surface 121f 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 drivenly rotates the second roller 122 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. 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 are obtained. Since the hardness of the outer peripheral surface 122f of the second roller 122 may 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, with a simple device configuration, the intermediate page of the bundle 50 of the paper sheets 51 can be firmly held by the adhesive tape 1.

In the bundle making 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 are 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 the cost can be reduced.

The tape mounting portion 130 includes a first roller 141a and a second roller 142a. The first roller 141a and the second roller 142a are urged in a direction of contact with each other. The tape mounting portion 130 arranges the adhesive tape 1 so as to straddle the first roller 141a and the second roller 142a. The tape mounting portion 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 mounts the adhesive tape 1 on the edge 61 of the bundle 50. With the above configuration, the following effects are 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 to the edge 61 of the bundle 50 can be improved. As a result, the adhesive tape 1 adheres along the edge 61 of the bundle 50, so that the edge 61 of the bundle 50 can be firmly wrapped with the adhesive tape 1. Therefore, the edge 61 of the bundle 50 can be held more firmly by the adhesive tape 1. Further, 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, a modified example 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 shown 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 hung 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 come into contact with the second surface 50b of the bundle 50 between the first pulley 223 and the second pulley 224.

The belt mechanism 221 can be brought into contact with and detached from 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, the portion of the outer peripheral surface 222f of the belt 222 that is arranged between the first pulley 223 and the second pulley 224 is deformed from the outer peripheral surface 121f of the first roller 121 along the surface of the bundle 50. It is formed so that it is easy to do.

Hereinafter, an example of the operation of the belt mechanism 221 of this modified example 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 with the bundle 50 sandwiched between the first roller 121 and the belt 222. As described above, the portion of the outer peripheral surface 222f of the belt 222 that is arranged between the first pulley 223 and the second pulley 224 is deformed from the outer peripheral surface 121f of the first roller 121 along the surface of the bundle 50. Cheap. Therefore, the portion of the bundle 50 sandwiched between the first roller 121 and the belt 222 bends along the outer peripheral surface 121f of the first roller 121. In addition, the portion of the outer peripheral surface 222f of the belt 222 arranged between the first pulley 223 and the second pulley 224 is deformed along the second surface 50b of the bundle 50. That is, the portion of the outer peripheral surface 222f of the belt 222 that is arranged between the first pulley 223 and the second pulley 224 is the first pulley 223 and the second pulley so as to follow the outer peripheral surface 121f of the first roller 121. It curves and dents in the space between 224.

Next, the side portion 50c of the bundle 50 is formed in a stepped shape. Specifically, first, the transfer path is switched from the first transfer direction to the second transfer direction by switching the switching member 126. Next, the portion of the outer peripheral surface 222f of the belt 222 arranged between the first pulley 223 and the second pulley 224 is deformed along the second surface 50b of the bundle 50, and the first roller 121 Is rotated (normal rotation). Along with this, the first pulley 223 and the second pulley 224 are driven to rotate (normal rotation). Then, the bundle 50 is sent out in the third direction W (see FIG. 37) to shift the plurality of paper sheets 51 in the third direction W.

In the above-described embodiment, the bundle creating unit 120 includes an 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, but the present invention is not limited to this. ..
For example, the bundle creating unit 120 may include, as the first contact member, a first pad having an arc portion (for example, a crescent-shaped member) capable of contacting the first surface 50a of the bundle 50. Alternatively, the bundle creating unit 120 may include, as the second contact member, a second pad having an arc portion capable of contacting the second surface 50b of the bundle 50.

Further, in the above-described embodiment, the example in which the first roller 121 actively rotates and the second roller 122 rotates in a driven manner in the bundle creating unit 120 has been described, but the present invention is not limited to this.
For example, both the first roller 121 and the second roller 122 may rotate independently. That is, at least one of the first roller 121 and the second roller 122 may be actively rotated and the other may be driven to rotate. The following effects are obtained by rotating both the first roller 121 and the second roller 122 independently. Since the second roller 122 can make the deviation of the paper sheets 51 uniform between the first surface 50a side and the second surface 50b side as compared with the case where the second roller 122 rotates according to the rotation of the first roller 121, the paper sheets 51 Can be sent stably.

Further, in the above-described embodiment, the tape mounting portion 130 has been described with reference to an example in which the first roller 141a and the second roller 142a are urged in the direction of contact with each other, but the present invention is not limited to this.
For example, only the first roller 141a may be urged in the direction of contacting the second roller 142a. Alternatively, only the second roller 142a may be urged in the direction of contacting the first roller 141a. That is, at least one of the first roller 141a and the second roller 142a may be urged in the direction of contacting the other.

Further, in the above-described embodiment, the tape mounting portion 130 includes the first roller 141a as the first urging member and the second roller 142a as the second urging member. Absent.
For example, the tape mounting portion 130 may include a first pad having an arc portion as the first urging member. Alternatively, the tape mounting portion 130 may include a second pad having an arc portion as the second urging member.

Further, in the above-described embodiment, in the operation of the binding device 110, the outer peripheral surface 122f of the second roller 122 is brought into contact with the second surface 50b of the bundle 50 while the outer peripheral surface 122f of the second roller 122 is returned to the original shape. Although the explanation has been given with an example of contact (see FIG. 40), 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 arrow V3 (see FIG. 41) with the outer peripheral surface 122f of the second roller 122 separated from the second surface 50b of the bundle 50.

Further, in the above-described embodiment, in the operation of the binding device 110 (at the start of the wrapping operation), the adhesive tape 1 is preliminarily unwound from the unwinding portion 131 along the length direction of the adhesive tape 1 (see FIG. 43). ), But it is not limited to this.
For example, the following operations may be performed at the start of the wrapping operation. First, the adhesive tape 1 is unwound from the unwinding portion 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 transport unit 132 transports the adhesive tape 1 unwound from the unwinding unit 131 along the length direction of the adhesive tape 1. Further, the tape holding portion 136 is moved to the side of the guide base 135. Then, the adhesive tape 1 is supported by the tape holding portion 136 while maintaining the posture of the adhesive tape 1.

Further, in the above-described embodiment, the number of adhesive tapes 1 attached to the edge 61 of the bundle 50 is not limited in the operation of the binding device 110. For example, one adhesive tape 1 extending over the entire width direction of the bundle 50 may be attached to the edge 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 61 of the bundle 50.
For example, when a plurality of adhesive tapes 1 are attached to the edge 61 of the bundle 50, the tape attachment portion 130 may be moved in the X direction with respect to the bundle making portion 120 by a moving mechanism (not shown). Alternatively, the bundle making portion 120 may be moved in the X direction with respect to the tape mounting portion 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 in the X direction.

Further, in the above-described embodiment, an example in which the adhesive tape 1 can be peeled off from the adherend A has been described, but the present invention is not limited to this. For example, the adhesive tape 1 may be non-peelable from the adherend A. That is, as the adhesive tape 1, a tape having various characteristics can be used according to the required specifications.

When the adhesive tape 1 that can be peeled off from the adherend A is used, it is preferable to use an adhesive tape 1 having an adhesive layer 11 having high adhesive strength and excellent breaking strength. According to this configuration, the adhesive layer 11 can be peeled off from the paper leaves 51 without leaving adhesive residue on the paper leaves 51.

According to at least one embodiment described above, the protective film 12 has a central slit 21 at least partially extending in the X direction. As a result, the adhesive layer 11 and the protective film 12 can be stretched together. This makes it possible to provide the adhesive tape 1 that can be easily peeled off from the adherend A.

Although some embodiments of the present invention have been described, these embodiments are presented as examples 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 gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention as well as the invention described in the claims and the equivalent scope thereof.

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

Claims (4)

One edge of a bundle of paper leaves formed by stacking a plurality of paper leaves using an adhesive tape that can be peeled off from the adherend by being stretched along the surface of the adherend. The adhesive tape attached to the bundle in which the plurality of paper sheets are displaced from each other in the direction intersecting the edge of the edge of the bundle with the adhesive tape crossing the edge of the edge of the bundle is attached to the adherend. Stretch along the surface,
How to peel off the tape. At one edge of a bundle of paper leaves formed by stacking a plurality of paper leaves, the plurality of paper leaves are shifted from each other in a direction intersecting the edge of the edge to form the bundle.
The adhesive tape according to claim 1 is crossed with the edge of the edge of the bundle, and at the edge of the bundle, the first surface of the bundle and the first surface of the bundle opposite to the first surface are used. The two surfaces and the side portion of the bundle between the first surface and the second surface are fastened with the adhesive tape.
How to bind paper leaves. Creating a bundle by shifting the plurality of paper leaves from each other in a direction intersecting the edge of the edge at one edge of the bundle of the paper leaves formed by stacking a plurality of paper leaves. Department and
An adhesive tape that can be peeled off from the adherend by being stretched along the surface of the adherend is attached to the edge of the bundle, and a tape attachment portion for binding the bundle is provided.
At the edge of the bundle, the tape mounting portion comprises 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. The adhesive tape is attached so as to straddle the side portion of the bundle between them, and the bundle is bound.
Paper leaf binding device. An adhesive layer that can be peeled off from the adherend by being stretched along the surface of the adherend.
A protective film that protects the adhesive layer is provided.
The protective film has a first cut, which is at least partially extended in the first direction, and can be stretched along the surface of the adherend in a state of being adhered to the adhesive layer.
Both ends of the first cut in the first direction are arranged inside the both ends of the protective film in the first direction.
The protective film has a first surface on the adhesive layer side and a second surface on the side opposite to the first surface.
The first cut is a notch formed in the protective film from the second surface side and does not reach the first surface.
Adhesive tape.

Images