JP6829486B2 - Binding tool - Google Patents

Description

The present invention relates to a binding tool used for a file.

Conventionally, the file binding tool is a mounting plate made of synthetic resin, and the binding string is bent outward and the restraining piece is slid to fix the position.

On the other hand, Patent Document 1 discloses a binding tool in which a binding string is bent inward and then a restraining piece is slid. By changing the thickness of the mounting plate, the binding tool makes it easier for the restraining piece to slide even when the tip ends of the binding strings overlap.

Utility Model Registration No. 3035478

However, in the conventional binding tool, since the binding element such as paper is strongly pressed between the mounting plate and the mount for binding, there is a problem that the mounting plate portion cannot be opened and the writing area becomes narrow. there were.

Therefore, an object of the present invention is to provide a binding tool capable of opening a portion of a mounting plate, thereby widening a writable area in a binding element such as paper.

In order to achieve the above object, the binding tool of the present invention includes an elastic binding string, a rod-shaped first stopper attached to the first end portion of the binding string, and a second end of the binding string. A rear mounting plate provided with a rod-shaped second stopper attached to the portion, a first through hole through which the first stopper is inserted, and a second through hole through which the second stopper is inserted. It is provided with a front mounting plate provided with a first through hole through which the first stopper is inserted and a second through hole through which the second stopper is inserted.

Further, the back mounting plate is provided with a plurality of the first through holes and a plurality of the second through holes, and the front mounting plate is provided with the plurality of the first through holes and the plurality of the second through holes. A through hole can be provided.

Further, a slit may be formed on the side surface of the rod-shaped first stopper and the rod-shaped second stopper so that the binding string can be fitted and moved.

Further, the end surface of the front mounting plate may be formed with a recess into which the binding string can be fitted.

Further, a plate having a side edge inserted into the book cover may be integrally attached to the back mounting plate and / or the front mounting plate.

Further, the binding tool of another form of the present invention is attached to the elastic binding string, the rod-shaped first stopper attached to the first end portion of the binding string, and the second end portion of the binding string. It is provided with a rod-shaped second stopper, and a back mounting plate provided with a first through hole through which the first stopper is inserted and a second through hole through which the second stopper is inserted. There is.

As described above, the binding tool of the present invention has an elastic binding string, a rod-shaped first stopper attached to the first end of the binding string, and a rod-shaped binding attached to the second end of the binding string. The back mounting plate provided with the second stopper, the first through hole through which the first stopper is inserted, and the second through hole through which the second stopper is inserted, and the first stopper are inserted. It is provided with a front mounting plate provided with a first through hole and a second through hole through which a second stopper is inserted. With such a configuration, the binding tool has a wide writable area on the binding element such as paper. That is, since the elastic binding string can be opened and closed 180 degrees, it is possible to write in all areas other than the binding string.

Further, the back mounting plate is provided with a plurality of first through holes and a plurality of second through holes, and the front mounting plate is provided with a plurality of first through holes and a plurality of second through holes. As a result, the optimum binding force can be obtained by selecting the optimum through hole from a plurality of through holes according to the thickness of the element to be bound.

Further, a slit is formed on the side surface of the rod-shaped first stopper and the rod-shaped second stopper so that the binding string can be fitted and moved, so that the front side of the front mounting plate can be reliably and easily moved. The 1st stopper and the 2nd stopper can be hooked.

Further, since the end surface of the front mounting plate is formed with a recess into which the binding string can be fitted, the thickness of the entire binding tool can be further reduced.

Further, since a commercially available book cover can be used by integrally attaching a plate whose side edge is inserted into the book cover to the back mounting plate and / or the front mounting plate, the binding tool and the cover can be used. It can protect the entire binding element and improve the appearance design.

Further, the binding tool of another form of the present invention is attached to a binding string having elasticity, a rod-shaped first stopper attached to the first end portion of the binding string, and a second end portion of the binding string. It is provided with a rod-shaped second stopper, and a back mounting plate provided with a first through hole through which the first stopper is inserted and a second through hole through which the second stopper is inserted. With such a configuration, the binding tool has a wide writable area on the binding element such as paper. That is, since the elastic binding string can be opened and closed 180 degrees, it is possible to write in all areas other than the binding string.

It is a perspective view explaining the whole structure of a binding tool. It is an exploded perspective view which disassembled the binding tool for each part. It is a perspective view of a stopper. It is a perspective view of the rear mounting plate. It is a perspective view of the front mounting plate. It is a perspective view of the stopper of a modification. It is a perspective view of the binding tool which attached the refill for a book cover. It is a perspective view of the refill for a book cover. It is a perspective view of the binding tool of Example 6. It is explanatory drawing of the use state of the binding tool of Example 6. It is a perspective view of the binding tool of Example 7. It is explanatory drawing of the use state of the binding tool of Example 7.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the examples described below are examples, and the present invention is not intended to be limited to the contents of the following examples.

(Preferable Example)
First, the overall configuration of the binding tool 10 of the present invention will be described with reference to FIGS. 1 and 2. The binding tool 10 includes an elastic binding string 20, a rod-shaped first stopper 31 attached to the first end of the binding string 20, and a rod-shaped first stopper attached to the second end of the binding string 20. A rear mounting plate 41 provided with two stoppers 32, a first through hole 41a through which the first stopper 31 is inserted, and a second through hole 41b through which the second stopper 32 is inserted, and a first stopper. It is provided with a front mounting plate 42 provided with a first through hole 42a through which 31 is inserted and a second through hole 42b through which the second stopper 32 is inserted.

The binding string 20 is a long string made of an elastic material. The binding string 20 may be made of any material as long as it has elasticity. Further, as long as it has elasticity, the material itself does not necessarily matter. The binding string 20 may have a structure in which only a part of the entire length has elasticity.

As shown in FIG. 3, the first stopper 31 and the second stopper 32 are rod-shaped (here, cylindrical or cylindrical) members arranged at both ends of the binding string 20. As will be described later, it is preferable to have substantially the same outer diameter as the through holes 41a, 41b, 42a, 42b provided in the back mounting plate 41 and the front mounting plate 42.

Further, slits 31a and 32a are formed on the side surfaces of the rod-shaped first stopper 31 and the rod-shaped second stopper 32 so that the binding string 20 that extends continuously from one end surface can be fitted and moved. There is. As shown in FIG. 6, the fasteners 31 and 32 can of course be formed in a simple cylindrical or cylindrical shape without slits.

As shown in FIG. 4, the back mounting plate 41 is a rectangular plate-shaped member having a long length in the longitudinal direction. The rear mounting plate 41 has a plurality of (three here) first through holes 41a, ... On both sides of the center, and a plurality of (three here) second through holes 41b, ... , Are formed. These through holes 41a, ..., 41b, ... Are provided so as to correspond to the positions of the six holes of, for example, bible-sized paper.

As shown in FIG. 5, the front mounting plate 42 is a rectangular plate-shaped member having a long hand dimension. The front mounting plate 42 has a plurality of (three here) first through holes 42a, ... On both sides of the center, and a plurality of (three here) second through holes 42b, ... , Are formed. These through holes 42a, ..., 42b, ... Are provided so as to correspond to the positions of the six holes of, for example, bible-sized paper.

Further, a recess 42c into which the binding string 20 can be fitted is formed on the end surface of the front mounting plate 42.

(effect)
Next, the effects of the binding tool 10 of this embodiment will be listed and described.

(1) As described above, the binding tool 10 of the present embodiment includes the elastic binding string 20, the rod-shaped first stopper 31 attached to the first end of the binding string 20, and the binding string. The rod-shaped second stopper 32 attached to the second end of 20 and the first through hole 41a through which the first stopper 31 is inserted and the second through hole 41b through which the second stopper 32 is inserted are A rear mounting plate 41 provided, and a front mounting plate 42 provided with a first through hole 42a through which the first stopper 31 is inserted and a second through hole 42b through which the second stopper 32 is inserted. I have. With such a configuration, the binding tool has a wide writable area on the binding element such as paper. That is, since the elastic binding string 20 can be opened and closed 180 degrees, writing can be performed in all areas other than the binding string 20.

(2) Further, the back mounting plate 41 is provided with a plurality of first through holes 41a, ... And a plurality of second through holes 41b, ..., And the front mounting plate 42 is provided with a plurality of first through holes 41a, .... By providing the first through hole 42a, ... And the plurality of second through holes 42b, ..., the optimum through hole can be obtained from the plurality of through holes 41a to 42b according to the thickness of the element to be bound. By selecting it, the optimum binding force can be obtained.

(3) Further, the front mounting plate 42 is formed with slits 31a and 32a on the side surfaces of the rod-shaped first stopper 31 and the rod-shaped second stopper 32 so that the binding string can be fitted and moved. The first stopper 31 and the second stopper 32 can be securely and easily hooked on the front side of the.

(4) Further, the thickness of the entire binding tool 10 can be further reduced by forming a recess 42c into which the binding string 20 can be fitted on the end surface of the front mounting plate 42.

(Other) In addition to the above-mentioned effects, according to the binding tool 10 of the present embodiment, it is possible to provide a binding tool 10 for a file that can be easily bound. That is, by using the resin rod-shaped fasteners 31 and 32, the resin rod-shaped fasteners 31 and 32 can be passed through the holes of the element to be bound such as paper without being bent, and can be easily bound.

Further, according to the binding tool 10 of the present embodiment, the binding tool 10 is such that the paper does not easily break. That is, the elastic binding string 20 allows the front mounting plate 42 and the back mounting plate 41 to be uniformly sandwiched, and the binding string 20 itself is distorted. Therefore, a hole provided in the binding element (for example, paper) is provided. It reduces the burden on the binding element (for example, paper) and makes it difficult to tear.

Further, according to the binding tool 10 of the present embodiment, the binding tool 10 has a wide writable area in the binding element (for example, paper). That is, the elastic binding string 20 can open and close 180 degrees, and writing can be performed in almost all areas other than the binding string 20 in the vicinity of the binding tool 10.

Further, the binding tool 10 of this embodiment is a binding tool 10 for a thin file. Specifically, since the thickness is "front mounting plate 42 + back mounting plate 41 + two binding strings 20", the overall thickness can be reduced.

(How to use the binding tool)
The binding tool 10 can be used, for example, as follows.
(1) From the back mounting plate 41, pass the binding string 20 so as to pass the filed member (for example, paper) and the front mounting plate 42. That is, the fasteners 31 and 32 are passed through the holes of the filed member (binding element). At this time, by inserting the stoppers 31 and 32 into the back mounting plate 41 and the front mounting plate 42 and making them stand upright, it becomes easier to insert the filed member.
(2) The fasteners 31 and 32 at both ends of the binding string 20 are fastened so as to be hooked on the insertion holes 42a and 42b of the front mounting plate 42. Alternatively, it is stopped by passing the fasteners (pipes) 31 and 32 through the recess 42c of the front mounting plate 42.
(3) When the number of sheets of paper is large (small), the tension of the binding string 20 is adjusted by selecting the through holes 41a, 41b, 42a, 42b through which the binding string 20 is passed according to the thickness.

The material of the back mounting plate 41: resin (for example, nylon) is suitable.
By making the diameters of the back mounting plate 41 and the stoppers 31 and 32 equal to each other, the stoppers 31 and 32 fit into the insertion holes 42a and 42b, and the file can be easily taken in and out.

The material of the front mounting plate 42: resin (for example, nylon) is suitable.
The fasteners 31 and 32 can be moved to the upper side or the side surface of the file by increasing the outer diameter of the fasteners 31 and 32 of the binding string 20 to form a groove through which only the binding string 20 can pass. This will make the file thinner.

Binding string 20: Rubber (hair rubber) is suitable. However, any material can be used as long as it has elasticity.
Fasteners 31 and 32 of the binding string 20: resin (for example, nylon) is suitable.
The binding string 20 and the fasteners 31 and 32 were prototyped. The binding string 20 can be made, for example, by cutting the hair elastic into an appropriate length. The fasteners 31 and 32 can be manufactured by, for example, a 3D printer.
When passing through the hole of the file, the binding string 20 does not protrude from the fasteners 31 and 32, so that it is easy to pass through.
When binding the file, the binding string 20 of the fasteners 31 and 32 can be moved toward the groove so that the file can be hooked on the front mounting plate 42 and bound firmly.

(How to assemble a prototype of binding string and fastener)
The binding string 20 and the fasteners 31 and 32 can be assembled, for example, as follows.
(1) Pass the fishing line through the stopper (pipe shape) in a ring shape.
(2) Pass the hair elastic through the loop.
(3) Pull the fishing line and pass the hair elastic through the stopper.
(4) Tie the hair elastic tightly and cut off the excess hair elastic.
(5) Tie tightly and pull the hair elastic so that it fits inside the stopper.
(6) Do the same for the other.
(Point) As for the size of the holes in the hair elastic and the fastener, if the inner diameter of the fastener is manufactured so that it fits tightly, the hair elastic part of the binding string will not come out completely.

(Experiment on materials)
Next, the material of each member will be considered.

Rear mounting plate: Metal (stainless steel)
By using a material with high hardness, the main body is less likely to bend even if the binder is firmly tightened with a binding string. However, it is not an optimal example because it looks bad and there are concerns about leftover burrs.

Front mounting plate: Metal (stainless steel)
By using a material with high hardness, the main body is less likely to bend even if the binder is firmly tightened with a binding string. However, it is not an optimal example because it looks bad and there are concerns about leftover burrs.

Binding string: Resin (nylon = fishing line)
There is some growth so it can be used. It is not optimal because it is too thin and the paper is easily torn. However, on the contrary, if it is used for such purposes such as a daily calendar, it may be rather beneficial.

Binding string fastener: Metal (stainless steel)
By making a hole in one side of the round pipe, a binding string was passed through that part to create a stopper. The manufacturing method was laser processing, and it was made by penetrating the laser so as to gouge from the center of the side surface to the end of the side surface of the round pipe. The reason for adopting such a method is that it is difficult to make a light and small iron pipe so as to change the inner diameter. [Maximum length of cross-sectional view horizontal to the axis of the binding string] is [Pipe diameter + Binding string string], and the string is difficult to get caught when passing the file (although it passes), so it is the most suitable example. do not do.

(Experiment on binding string and fastener)
Next, an experiment on a binding string and a fastener will be described.
A binding string was prototyped by combining a stopper created with a 3D printer and a ready-made string.

(Experiment 1)
Can the elastic cord be passed through? (The result is ok or ng on the left side), and after threading, can you tie a knot and thread the knot? (The right side is the result ok or ng) was tested.

[Outer diameter: 4.5mm, Inner diameter: 3.5mm] pipe vs rubber A_1 ~ rubber D
result:
--Rubber A_1 ok ok
--Rubber A_2 ok ok
--Rubber B ok ok
--Rubber Co ok ok
--Rubber D ok ng
Rubber A_1 can be passed through a pipe with [outer diameter: 4.5 mm, inner diameter: 3.5 mm] by the method of [Assembly of binding string]. However, it is not possible to fit the knot after tying in [How to assemble the binding string] into the pipe.

[Outer diameter: 4.0mm, Inner diameter: 3.0mm] Pipe vs Rubber A_1 ~ Rubber D
result:
Rubber A_1 ok ok
Rubber A_2 ok ok
Rubber B ok ok
Rubber C ok ok
Rubber D ng-

[Outer diameter: 3.5mm, Inner diameter: 2.5mm] Pipe vs Rubber A_1 ~ Rubber D
result:
Rubber A_1 ok ok
Rubber A_2 ok ok
Rubber B ok ok
Rubber C ok ok
Rubber D ng-

[Outer diameter: 3.0mm, Inner diameter: 2.0mm] pipe vs rubber A_1 ~ rubber D
result:
Rubber A_1 ng-
Rubber A_2 ng-
Rubber B ng-
Rubber C ng-
Rubber D ng-

Conclusion: It seems that it will not pass between 2.0 mm and 2.5 mm inside diameter.

(Experiment 2)
It was tested whether it was firmly fixed at the part where the inner diameter was changed.
This test is performed only on rubber A_1. (Although it is not impossible with other rubber cords, I chose rubber A_1 as the optimum example because I thought that the thicker one would make the paper less likely to tear.) Also, in Experiment 1, the pipe thickness was set to 0.5 mm. However, it was a little brittle and I could crush it by pinching it strongly with my fingers. The thickness of the stopper was set to 0.75 mm.

result:
Outer diameter: 4.0 Inner diameter 1: 2.5 mm Inner diameter 2: 2.0 mm
ng It is easy to thread the string, but it will come off if you pull it strongly.
Outer diameter: 4.0 Inner diameter 1: 2.5 mm Inner diameter 2: 1.8 mm
ok The string is still easy to thread and will not come off even if you pull it strongly.
Outer diameter: 4.0 Inner diameter 1: 2.5 mm Inner diameter 2: 1.6 mm
ok It takes a lot of force to thread the string, but it won't come off even if you pull it strongly.
Conclusion: The inner diameter of 1.6mm and 1.8mm is good because the knot does not come off.

(Abbreviation)
Rubber A_1 (hair rubber): Core: Natural rubber Skin: Nylon Thickness 3mm
Rubber A_2 (hair rubber): Core: Natural rubber Skin: Rayon Thickness 3mm
Rubber B (hair rubber): Core: Natural rubber Skin: Nylon Thickness 2.3mm
Rubber C (commercial rope): Core: Natural rubber (carbon compound) Skin: Polyester Thickness 3mm
Rubber D (commercial rope): Core: Natural rubber (carbon compound) Skin: Polyester 2mm thick

(Experiment of the diameter of the through hole of the back mounting plate and the diameter of the stopper)
The diameter of the hole of the rear mounting plate created by the 3D printer was changed from 3.75 mm to 4.00 mm for the stopper with a diameter of 4.0 mm created by the 3D printer (Experiment background: Hole when the stopper was passed through). It is more convenient if the printer fits tightly because the stopper stands upright when loading and unloading the paper).
Hole diameter: 4.00mm
A maximum tilt of 9 degrees occurs. There is almost no resistance when passing it.
Hole diameter: 3.95mm
A maximum tilt of 5 degrees occurs. There is almost no resistance when passing it.
Hole diameter: 3.90mm
A maximum tilt of 4 degrees occurs. There is very light resistance when passing.
Hole diameter: 3.85mm
A maximum tilt of 3 degrees occurs. There is very light resistance when passing.
Hole diameter: 3.80mm
A maximum tilt of 1 degree occurs. There is a slight resistance when passing tightly.
Hole diameter: 3.75mm
A maximum tilt of 0 degrees occurs. There is strong resistance when passing tightly.
Therefore, if it is 3.80 mm to 3.85 mm, it is optimal because the stopper stands upright and there is not much resistance to passing the stopper.

(Refill for book cover)
As shown in FIGS. 7 and 8, the book cover refill 50 as a plate can be attached to the back mounting plate 41 and / or the front mounting plate 42 of the binding tool 10 to be used by inserting it into the book cover. it can.

The book cover refill 50 is designed so that the opening and closing of the file itself is not affected by the bending of the folded portion. (If you just insert a hard refill for the cover into the book cover, the file itself will open at the same time you open the book cover.) Also, if you make the material with resin, you can make various book covers. You will also be able to cut and use it to fit.

(Binding string only)
Next, with reference to FIGS. 9 and 10, a binding tool 10A composed of only the binding string 20 without the back mounting plate 41 or the front mounting plate 42 will be described.

First, the configuration of the binding tool 10A will be described. The binding tool 10A includes a binding string 20 having elasticity, a rod-shaped first stopper 31 attached to the first end portion of the binding string 20, and a binding string 20. It is composed only of a rod-shaped second stopper 32 attached to the second end portion. Slits 31a and 32a into which the binding string 20 can be fitted and moved are formed on the side surfaces of the first stopper 31 and the second stopper 32.

Next, a method of assembling the binding tool 10A will be described. The method of assembling the binding tool 10A comprises the following two steps.
1. 1. Thread the binding string 20 through the hole in the file.
2. 2. The first stopper 31 and the second stopper 32 are bent at a substantially right angle to the binding string 20 and passed through the slits 31a and 32a so as to be caught in the file.

Next, the effect of the binding tool 10A will be described. As described above, the binding tool 10A of the present embodiment includes the elastic binding string 20, the rod-shaped first stopper 31 attached to the first end of the binding string 20, and the second binding string 20. It is composed only of a rod-shaped second stopper 32 attached to the end portion. Then, slits 31a and 32a into which the binding string 20 can be fitted and moved are formed on the side surfaces of the first stopper 31 and the second stopper 32.

With such a configuration, a plurality of files (paper, etc.) can be combined into one. Furthermore, it can be used like a notebook in a state where multiple files are put together. Further, by removing the binding tool 10A, a plurality of files can be separated or the files can be reorganized. In addition, when tension is generated in the binding string 20, the file itself may be bent. Therefore, the tension may be adjusted by changing the position of the through hole (the hole on the file side (paper side)), or the length of the string portion may be adjusted when the binding string 20 is created.

Since other configurations and operations are the same as those in the first to fifth embodiments, description thereof will be omitted.

(Back mounting plate and front mounting plate are integrated)
Next, with reference to FIGS. 11 and 12, the binding tool 10B including the integrated mounting plate 40 in which the back mounting plate 41 and the front mounting plate 42 are integrally formed will be described.

First, the configuration of the binding tool 10B will be described. As in the first embodiment, the binding tool 10B includes the binding string 20, the first stopper 31, the second stopper 32, the back mounting plate 41, and the front mounting. It is provided with a plate 42. In the binding tool 10B of this embodiment, the back mounting plate 41 and the front mounting plate 42 are connected by a semi-cylindrical connecting portion 43 to form an integrated mounting plate 40.

Next, a method of assembling the binding tool 10B will be described. The method of assembling the binding tool 10B comprises the following four steps.
1. 1. 2. Pass the binding string 20 through the hole on the back side of the integrated mounting plate 40. Thread the binding string 20 through the file. 3. Pass the binding string 20 through the hole on the front side of the integrated mounting plate 40. The first stopper 31 and the second stopper 32 are bent at a substantially right angle to the binding string 20 and passed through the slits 31a and 32a so as to be hooked on the integrated mounting plate 40.

Next, the effect of the binding tool 10B will be described. As described above, the binding tool 10B of this embodiment is an integrated mounting in which the binding string 20, the first stopper 31, the second stopper 32, the back mounting plate 41, and the front mounting plate 42 are integrated. It is composed of a plate 40 and.

With such a configuration, the positions of the holes on the front side and the positions of the holes on the back side of the integrated side mounting plate 40 are aligned with the corresponding positions. As a result, even when the binding string 20 is stretched relatively loosely, the file is less likely to be disturbed, and even if it is disturbed, it can be easily arranged.

Since other configurations and operations are the same as those in the first to fifth embodiments, description thereof will be omitted.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes to the extent that the gist of the present invention is not deviated are described in the present invention. included.

For example, in Example 1-5, the binding tool including the binding string 20, the first stopper 31, the second stopper 32, the back mounting plate 41, and the front mounting plate 42 has been described. Of these, the front mounting plate 42 is not an essential component and may not be required.

That is, as another form of binding tool, an elastic binding string, a rod-shaped first stopper attached to the first end of the binding string, and a rod-shaped binding attached to the second end of the binding string. A binding tool comprising a second stopper, a back mounting plate provided with a first through hole through which the first stopper is inserted, and a second through hole through which the second stopper is inserted. It may be. Even with such a configuration, the desired purpose of binding the bound element can be sufficiently achieved by suppressing the front surface of the bound element with the first stopper and the second stopper.

Further, as the material of the binding string 20, a stretchable wire incorporating a spring or the spring itself (a long version of the spring such as that contained in the core of a ballpoint pen) can be substituted. That is, the binding string 20 may be made of any material as long as it is a string (or a long member) that expands and contracts in the long direction.

It is also possible to separate the stopper from the stick that is passed through the file. By separating, the stopper part becomes simple and inconspicuous. However, since the rod itself cannot be taken out from the string, it remains on the string that passes through the back mounting plate of the file.

10 Binding tool 10A, 10B Binding tool 20 Binding string 31 First stopper 31a Slit 32 Second stopper 32a Slit 40 Integrated mounting plate 41 Back mounting plate 41a First through hole 41b Second through hole 42 Front mounting plate 42a 1 through hole 42b 2nd through hole 42c recess 50 Refill for book cover (plate)

Claims (4)

With elastic binding string,
A rod-shaped first stopper attached to the first end of the binding string,
A rod-shaped second stopper attached to the second end of the binding string, and
A rear mounting plate provided with a first through hole through which the first stopper is inserted and a second through hole through which the second stopper is inserted.
A front mounting plate provided with a first through hole through which the first stopper is inserted and a second through hole through which the second stopper is inserted is provided.
A binding tool in which a recess into which the binding string can be fitted is formed on the end surface of the front mounting plate. The back mounting plate is provided with a plurality of the first through holes and a plurality of the second through holes, and the front mounting plate is provided with the plurality of the first through holes and the plurality of the second through holes. The binding tool according to claim 1, wherein the binding tool is provided with. The binding according to claim 1 or 2, wherein a slit is formed on the side surface of the rod-shaped first stopper and the rod-shaped second stopper so that the binding string can be fitted and moved. Ingredients. The binding according to any one of claims 1 to 3 , wherein a plate having a side edge inserted into the book cover is integrally attached to the back mounting plate and / or the front mounting plate. Ingredients.

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