JPH10329470A - Binder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binder that can save materials and reduce the weight. SOLUTION: A binder 10 includes a casing 12. A leverage member 34 for opening a binding ring 32 is pivoted by each end of the case 12. The leverage member 34 includes a connecting piece 36. A finger pressing piece 42 adapted be pressed by the finger of a user is formed integrally with the connecting piece 36 in such a manner as to extend in a direction normal to a main surface of the connecting piece 36 and outwardly along a longitudinal direction of the binder 10. Thus finger pressing piece 42 is formed so as to extend out in a thickness direction of a paper P through a gap formed between respective edge portions Pe, Pe of two papers P confronting each other in a width direction when they are bound with the binding rings 32 and placed in such a manner as to be opened, respectively, to both sides in the width direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding device, and more particularly to a binding device used as, for example, a ring binder or a file.

[0002]

2. Description of the Related Art FIG. 12 is a perspective view showing an example of a conventional so-called vertical lever type two-hole binding device. The binding device 1 includes a substantially strip-shaped holding member 2 made of an elastic metal.
The holding member 2 is attached to a spine of a binder or a file (hereinafter, simply referred to as a spine H) with a fixing tool such as an eyelet. A movable piece to which one end of a substantially annular binding rod 3 is fixed is housed inside the holding member 2. Since the movable piece is constantly urged inward from both sides in the width direction by the holding member 2, the binding rod 3 is stably held in either the open state or the closed state. Substantially annular binding rod 3
Includes a pair of substantially semicircular hooks 3a and 3b provided so as to mesh with each other at the center, and is formed so as to open when the two are separated from each other. This movement is referred to as opening movement of the binding rod 3 in this specification. Lever members 4 are provided at both ends in the length direction of the holding member 2. This lever member 4
Is rotatably supported by the holding member 2, one end is formed to extend in the thickness direction of the holding member 2, and the other end is connected to a movable piece inside the holding member 2. When the user presses one end of the lever member 2 in the direction of the spine, the other end presses and bends the movable piece inside the holding member 2, whereby the binding rod 3 is opened and the pair of hooks 3a is opened. , 3b are spaced apart from each other. After the paper P is inserted into or removed from the claws 3a, 3b, the binding rod 3 is closed by engaging the pair of claws 3a, 3b at the center. In this specification, the term “paper” is not limited to paper, but is used to include a film, a sheet, a case, etc., which are all bound by a binder or a file.

[0003]

However, in the conventional binding device 1, if the length of the holding member 2 is shorter than the length of the edge Pe of the paper P to be bound, the lever member 4 moves below the paper P. I can't operate because I'm hiding,
The lever member 4 damages the edge Pe of the sheet P, and furthermore, the lever member 4 hinders the sheets from overlapping and closing. Therefore, in the conventional binding device 1, FIG.
As shown in (1), the lever members 4 must be arranged on both outer sides in the length direction of the sheet P, and the holding member 2 and the movable pieces inside the holding member 2 need to be formed to have substantially the same length as the spine F. Was. For this reason, the conventional binding device 1 has disadvantages such as not being able to save the material and increasing the weight. Further, since the point at which the force of the lever member 4 acts is biased to both ends in the longitudinal direction of the movable piece, a relatively large force is required to open the binding rod 3. These inconveniences also apply to other conventional binding devices having a flat lever type or X-type lever member.

[0004] Therefore, a main object of the present invention is to provide a binding device that can save material and reduce weight.

[0005]

According to the present invention, there is provided a binding device comprising:
A holding member that is formed with elasticity and is arranged so as to extend substantially parallel to one side of the sheet to be bound, and is housed inside the holding member while being urged inward from both widthwise outer sides in the width direction,
A movable piece provided so as to be able to bend, one end is fixed to the movable piece, the other end is provided to extend outside the holding member, and the other end is opened and closed in the width direction with the bending of the movable piece. An annular binding rod is provided at both ends in the length direction of the holding member, one end of which is disposed to face a movable piece in the holding member, and the other end is formed so as to extend outside the holding member. By pressing the end, the lever includes a lever that opens the binding rod by bending the movable piece at one end, wherein the lever is
When a plurality of sheets are bound by a binding rod and arranged in a spread state on both sides in the width direction, the sheets are formed to extend in the thickness direction of the sheet through gaps generated between the edges of the sheets facing in the width direction. It is a binding device. In this binding device, the lever member is formed so as to extend in the thickness direction of the sheet through a gap generated between the edges of the sheet facing in the width direction. The user can easily open the binding rod by pressing the lever member extending in the thickness direction from between the sheets.
Therefore, it is not always necessary to dispose the lever member on the outer side in the length direction of the sheet, and the holding member and the movable piece can be set to the necessary minimum length. Therefore, in this binding device, the material can be saved and the weight can be reduced.

Further, a binding device according to the present invention is formed with an opening in the thickness direction, and is arranged to extend substantially in parallel with one end side of a sheet to be bound, and has elasticity. A holding member detachably attached to the opening of the case, a movable piece that is housed inside the holding member while being urged inward from both outer sides in the width direction, and a bendable movable piece, and one end portion. A substantially annular binding rod which is fixed to the movable piece, the other end of which is extended to the outside of the holding member and the other end of which is opened and closed in the width direction as the movable piece is bent; The pivot is rotatably supported with a pivot, one end of which is arranged to face the movable piece in the case, the other end is formed to extend outside the case, and the pivot is formed by pressing the other end. Rotate in the thickness direction as the center, one end bends the movable piece A binding device comprising a lever member for opening a rod, the lever member transmitting a finger pressure to the movable piece, a pivot formed to protrude on both sides in the width direction of the transmission portion, and a transmission member on one end side. Portion, the other end side is formed so as to expand in a direction orthogonal to the direction in which the pivot extends, and when a plurality of sheets are pierced through a binding rod and arranged in a spread state on both sides in the width direction, the width direction And an acupressure piece disposed so as to extend in the thickness direction of the sheet through a gap generated between the end sides facing each other. In this binding device, the lever member is formed so as to extend in the thickness direction of the sheet through a gap generated between the edges of the sheet facing in the width direction. When the user presses the lever member extending in the thickness direction from between the sheets in the thickness direction, the lever member pivotally supported by the case rotates in the thickness direction about the pivot axis, and one end of the lever member moves. Bend. With the bending of the movable piece, the binding rod opens. In this binding device, since the lever member is formed as described above, it is not necessary to arrange the lever member on both outer sides in the length direction of the sheet as in the related art. Can also be formed short. Therefore, according to this binding device, the material can be saved, the weight can be reduced, and the movable piece can be bent with a relatively small force to easily open the binding rod.

Further, in the binding device according to the present invention, the case includes a locking projection formed at an edge of the opening, and a pedestal formed opposite the locking projection in the thickness direction. , By detachably holding the holding member between the locking projection and the base,
It is preferable that the holding member can be removed from the case. In the conventional binding device, since the holding member is directly fixed to the spine, it is difficult to separate the two, and it is difficult to cope with separation and disposal, recycling of materials, and the like. However, in this binding device, in addition to the above-described effects, the holding member can be removed from the case, so that the case and the binding device can be easily separated, and disposal and recycling can be easily performed. Become.

Further, in the binding device according to the present invention, a mounting piece having a mounting hole for mounting a fixing device for fixing to a spine is integrally formed at both ends in the longitudinal direction of the case, and a lever member is provided. Further includes a connecting piece formed between the transmitting portion and the acupressure piece so as to face the mounting piece in the thickness direction, and the connecting piece has a working hole for inserting the fixing tool communicating with the mounting hole. It is preferable to form it. In this case, in addition to the above-described functions and effects, a mounting piece having a mounting hole for mounting a fixing tool such as an eyelet for fixing the binding tool and the spine extends to both outer sides in the longitudinal direction of the case. Have been. A working hole is formed in the connection piece of the lever member so as to communicate with the mounting hole of the mounting piece. Therefore, when performing the work of attaching the fixing tool, the fixing tool can be attached to the mounting hole below the connection piece through the work hole. Therefore, after the binding device is completed, the completed binding device can be later attached to the spine. Therefore, according to this binding device, it is possible to rationalize assembly, and it is possible to obtain a binding device that is easily adapted to mechanization and automation of a manufacturing process. Further, in the case where a heading portion is formed by attaching a heading label to the spine, for example, the heading portion can be formed only between the fixing devices, so that a large heading portion cannot be formed if the interval between the fixing devices is small. . However, according to the present invention, the spacing between the fasteners can be increased, so that a large heading can be formed without damaging the heading with the fasteners.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings.

[0010]

FIG. 1 is a perspective view showing an example of a binding device according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a plan view thereof. FIG. 5 is a rear view thereof. The binding device 10 shown in FIG. 1 is for two holes, and is formed to be shorter than the length of the spine H and the side edge Pe of the paper P to be bound. The binding device 10 shown in FIG. 1 includes a substantially rectangular case 12 made of a synthetic resin such as polypropylene. FIG. 7 is a front view showing a case of the binding device shown in FIG. 1, and FIG. 8 is an illustrative view showing a main part thereof.
The case 12 is arranged substantially parallel to the direction in which the edge Pe of the spine H and the paper P to be bound extends. In this specification, this direction is called a length direction, and a direction orthogonal to the length direction is called a width direction. Further, a direction orthogonal to the length direction and the width direction is referred to as a thickness direction. This thickness direction coincides with the thickness direction of the spine H. An opening 14 is formed in the front of the case 12, and the back is in contact with the inner surface of the spine H of the file or binder.
At both ends of the case 12 in the length direction, mounting pieces 16 are respectively formed to extend outward on both sides in the length direction and are integrally formed.
Therefore, the interval between the mounting pieces 16 at both ends of the case 12 becomes longer. A mounting hole 18 is formed in the mounting piece 16 so as to penetrate in the thickness direction. As shown in FIG. 8, the attachment hole 18 is for allowing a fixing tool F such as an eyelet to pass therethrough and integrally fixing the attachment piece 16 and the spine F by caulking. Although eyelets are used as the fixing tool here, the present invention is not limited to this, and for example, screws, bolts and nuts, rivets and the like may be used. The case 12 may be fixed to the spine F by, for example, high-frequency welding. The binding device 10 includes a mounting piece 16 and a mounting hole 1.
8 is formed as described above, the length from the mounting hole 18 at one end to the mounting hole 18 at the other end of the case 12 is increased, and the distance between the fixing members F in the length direction of the spine H is increased. Can be large. Therefore, a large heading portion can be formed without damaging the heading portion formed on the spine H with the fastener F.

In the vicinity of the four corners of the opening 14 of the case 12,
As shown in FIGS. 2, 7 and 10, the locking projection 20 has a substantially triangular cross section so as to protrude inward from the open edge.
Is formed. The locking projection 20 is provided with a holding member 28 described later.
The four corners of the cover 28a are pressed downward from above in FIG. 10 to prevent the cover 28a from coming off without permission. A pedestal portion 22 is formed on the inner bottom surface of the case 12 so as to face the locking projection 20 in the thickness direction. The pedestal portion 22 is formed in an elongated shape extending in the length direction on both sides in the width direction inside the case 12 as shown in FIG. The pedestal portion 22 includes a holding member 28 described later.
Is placed and is sandwiched between the locking projections 20. Further, bearing portions 24 for rotatably supporting a pivot of a later-described lever member 34 are formed at both ends in the longitudinal direction inside the case 12.
Further, substantially rectangular concave portions 26 are formed at both ends in the length direction of each case 12 so as to penetrate through the center of each bearing portion 24 in the thickness direction. This recess 26
This is to prevent the rotation of the lever member 34 described later from being hindered.

As shown in FIGS. 1 to 3 and 10, a substantially rectangular holding member 28 is formed in the opening 14 of the case 12.
Is detachably attached. The holding member 28 is formed of a metal having elasticity, and its cross-sectional shape is, as shown in FIG. 10, a cover part 28a having an arcuate curved surface, and both sides in the width direction are bent so as to protrude downward in FIG. And has a substantially U-shaped cross section as a whole. The holding member 28 is for holding a movable piece, which will be described later, while constantly biasing the movable piece inward from both sides in the width direction. The holding member 28 has sharp portions at both ends in the length direction and four corners, and these portions are
As shown in FIG. 2, FIG. 3 and FIG.
2 covered. As shown in FIG. 10, the holding member 28 is placed on the pedestal portions 22 on both sides in the width direction inside the case 12 with the lower edge of the folded portion 28b abutting. As shown in FIG. 2, the vicinity of the four corners of the upper surface of the cover portion 28a is pressed by the locking projection 20, and the folded portion 28b is
It is compressed so that the angle between the inner surface of the cover portion 28a and the inner surface becomes more acute. As a result, a force to return to the original position acts by the elastic force between the cover portion 28a and the folded portion 28b, so that the holding member 28 is firmly held between the locking projection 20 and the pedestal portion 22. At the time of manufacture, case 12
The holding member 28 is attached to the case 12 by pushing the holding member 28 downward from above in FIG. On the other hand, when the binding device 10 is discarded, the holding member 28 can be removed from the case 14 by strongly pulling the holding member 28 with a force higher than the force applied during normal use. However, it is needless to say that the size of the locking projection 20 and the elastic force of the holding member 28 are appropriately adjusted at the time of design so that a practically sufficient strength can be obtained without being detached during use. .

As shown in FIG. 10, a movable piece 30 having a substantially V-shaped cross section is housed inside the holding member 28. The movable piece 30 is formed so that, for example, two metal plates 31 having substantially the same length as the holding member 28 are arranged in parallel in the width direction, butted at the center in FIG. 10, and bent at the center. This is the same as that conventionally used for a ring binder. This movable piece 30
The binding rod 32, which will be described later, is fixed to the opening / closing unit so as to be integrally opened and closed.
, Or in a state of a substantially V-shaped section shown in FIG. 10B.

Further, substantially annular metal binding rods 32 are fixed near both ends of the movable piece 30 in the length direction. The binding rod 32 is used to bind the paper P by inserting it into a binding hole preliminarily formed in the paper P, and is the same as that conventionally used. Binding rod 3
2 is a pair of claws 32a, 32b each having a substantially semicircular shape.
including. One end of each of the pair of claws 32a and 32b is fixed to the movable piece 30, and the other end is formed so as to extend outwardly through the holding member 28 in the thickness direction and to engage with each other at the center. I have. When the movable piece 30 is in a substantially inverted V-shaped state, the other ends of the pair of hooks 32a and 32b are separated from each other, the binding rod 32 is opened, and when the movable piece 30 is in a substantially V-shaped state. The other ends of the pair of hooks 32a and 32b are engaged with each other, so that the binding rod 32 is closed. The binding device 10 includes the metal holding member 28 and the movable piece 3 described above.
0 is housed in the synthetic resin case 12 and the sharp corners and end faces of the case 12 are covered by the case 12, so that there is no risk of damaging the user's finger.

The movable piece 3 is provided at both ends of the case 12.
Lever member 3 for bending binding 0 to open binding rod 32
4 are respectively supported. FIG. 6 is a front view showing the lever member 34, and FIG. 9 is an illustrative view showing the movement thereof from the side. The lever member 34 is formed of, for example, a synthetic resin such as ABS, and includes a connecting piece 36 having a surface extending substantially parallel to the spine H and the mounting piece 16.
As shown in FIG. 9, the connection piece 36 extends substantially parallel to the attachment piece 16 of the case 12 and is disposed between the paper P and the spine H to be bound as shown in FIG. is there. A finger pressure is applied to one end of the connection piece 36.
10 and is formed integrally with a substantially rectangular pressing piece 38 as a transmitting section for pushing up from below in FIG. 10 in the longitudinal direction. Pressing piece 3
A pivot 40 is integrally formed on both sides in the width direction of the connection piece 36 near 8 so as to protrude to both outsides. This Axis 4
Numeral 0 is rotatably supported by the bearing portion 24 of the case 12. A substantially central portion of the connection piece 36 is bent upward in a substantially L-shape as shown in FIG. The bent portion is provided with the holding member 28 together with the case 12.
Also, it functions to cover the end face of the movable piece 30. Further, the other end of the connection piece 36 is formed so as to extend obliquely upward and outward in the length direction as viewed from the case 12 fixed to the spine H. However, as shown by a two-dot chain line in FIG. 9, the obliquely extending portion is formed so as to be parallel to the mounting piece 16 when the lever member 34 rotates about the pivot 40.

As shown in FIGS. 2 and 6, the main surface of the connecting piece 36 has at least a diameter larger than that of the fixing member F, and has a substantially circular shape so as to communicate with the lower mounting hole 18. A working hole 44 is formed. In this specification, “communication” means that the working hole 44 and the mounting hole 18 are formed at a position where they are overlapped with an interval. Without the work hole 44, the connecting piece 36 becomes an obstacle, and it becomes difficult to attach the fixing tool F after the binding tool 10 is completed.
0 must be completed, which is inconvenient in the manufacturing process. However, in this binding device 10, since the working hole 44 is formed in the connection piece 36 of the lever member 34, the fastening tool is inserted from directly above the completed binding device 10 through the working hole 44 to the mounting hole 18 below the completed binding device 10. F can be attached. Therefore, it is possible to streamline the manufacturing process of the binder, the file, and the like, and it is easy to automate or mechanize the assembly.

Further, at the other end of the connection piece 36, a finger pressure piece 42 for the user to press with a finger is integrally formed as shown in FIGS. 2, 3, 6, and 9. You. The acupressure piece 42 has a surface that extends in the thickness direction of the binding device 10 and has a substantially triangular plate shape when viewed from the side. The other end of the acupressure piece 42 is formed so as to extend in a direction orthogonal to the direction in which the pivot 40 extends and to extend outward along the length direction of the binding device 10. That is, the flat surface of the acupressure piece 42 has a main surface to which the binding device 10 is fixed.
Are formed so as to be orthogonal to the main surface of the spine H and extend in the length direction of the spine H. Therefore, as shown by a two-dot chain line in FIG.
, The respective edges P of the sheets P facing each other in the width direction
The paper P extends in the thickness direction of the paper P through a gap generated between Pe and Pe. The interval of the gap between the end sides Pe, Pe depends on the diameter of the binding rod 32 and the position of the binding hole provided in the paper P. In this case, the gap between the end sides Pe, Pe only needs to be slightly wider than the thickness of the plate-shaped acupressure piece 42.
It is not necessary to unnecessarily increase the diameter of the binding rod 32 or the width of the holding member 28, and a conventional standard can be applied as it is. That is, in the binding device 10, the sheets P, P
Although the distance between the gaps generated between the side edges Pe and Pe is the same as that of the conventional one, the acupressure piece 42 has the edge sides Pe and Pe.
It is formed so as to extend in the thickness direction of the paper P from between Pe. Further, since the acupressure piece 42 is a flat plate, the acupressure piece 42 and the paper P are parallel to each other even when a plurality of papers P are overlapped in their thickness direction and the cover is closed. Or damage the paper P.

When the user tries to open the binding rod 38,
Acupressure piece 42 extending in the thickness direction from between end edges Pe of paper P
When a finger pressure is applied to the end surface orthogonal to the main surface from above in the direction of the spine H below, the lever member 34 pivotally supported by the case 12 rotates about the pivot 40, and a pressing piece 38 at one end thereof.
Pushes up the movable piece 30 from below to bend it into a substantially inverted V-shape. With the bending of the movable piece 30, the binding rod 32
Opens. In this binding device 10, since the holding member 28 and the movable piece 30 are formed with the minimum length required, and unnecessary finger pressure is not required, the binding member 10 can be moved with a smaller force than a conventional long binding device. The piece 30 can be bent, and the binding rod 32
Can be easily opened.

Since the binding device 10 has the above-described configuration, the holding member 16 and the movable piece 30 do not need to be made longer than necessary, and can be formed shorter than the length of the paper P, thereby saving material. And lightening can be achieved. Further, the binding piece 32 can be opened by bending the movable piece 30 with a relatively small force, and the operability is good. Also,
Since the binding device 10 can easily separate the case 12 and the lever member 34 made of synthetic resin from other members made of metal, the synthetic resin part is made with a cover similarly formed of synthetic resin or the like. Can be discarded, etc.
Metal parts can be discarded separately from them. Therefore, it is easy to adapt to sorting waste and recycling that are demanded by society today. Furthermore, this binding device 10
As described above, it is possible to rationalize the assembly and easily adapt to the mechanization and automation of the manufacturing process.

The shape of the lever member 34 is not limited to the one described above, and may be any shape as long as it extends from the gap between the edges of the sheet P, and may be, for example, as shown in FIG. FIG.
The lever member 34 shown in FIG. The connection piece 36 has a surface that extends substantially parallel to the spine H and the attachment piece 16, and has a substantially L-shape when viewed from the side. One end of the connecting piece 36 serves as a pressing piece 38 for pushing up the central portion of the movable piece 30 from below to above. On both sides of the connecting piece 36 in the width direction, the pivots 40
Are integrally formed. Further, at the other end of the connection piece 36,
The acupressure piece 42 is formed. The acupressure piece 42 is a substantially triangular plate when viewed from the side. This acupressure piece 42
As shown in FIG. 11, one end is formed integrally with the connecting piece 36 and the other end is formed so as to extend outward along the length direction of the binding device 10 in a direction orthogonal to the direction in which the pivot 40 extends. Is done. That is, the acupressure piece 42 also has a main surface that extends in the thickness direction of the binding device 10, that is, a direction orthogonal to the main surface of the spine H, similarly to the above-described acupressure piece. Then, by pressing the end surface orthogonal to the main surface of the acupressure piece 42 in the thickness direction of the binding device 10, the binding rod 32 can be opened. Therefore, also in this case, the same effect as described above can be obtained. The pivot 40 of the lever member 34 may be formed directly on the acupressure piece 42. Further, the lever member 34
The pivot 40 may be rotatably supported by the holding member 28. In this case, the holding member 28 can be directly attached to the spine H without using the case 12.
In addition, the transmission unit for transmitting the finger pressure to the movable piece 30 includes:
The movable piece 30 is not limited to being pushed up from below, but may be a piece in which the central portion of the movable piece 30 is pulled up. Further, the binding device 10 may have two or more binding rods 32. In that case, it can be formed in the same manner as described above.

[0021]

According to the binding device of the present invention, the holding member and the movable piece can be formed shorter than the length of the sheet to be bound.
The material can be saved, and the weight can be reduced. Furthermore, according to the binding device of the present invention, the binding rod can be opened with a relatively small force, so that the operability is improved as compared with the conventional one.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a binding device according to the present invention.

FIG. 2 is a front view of the binding device shown in FIG.

FIG. 3 is a side view of the binding device shown in FIG. 1;

FIG. 4 is a plan view of the binding device shown in FIG. 1;

FIG. 5 is a rear view of the binding device shown in FIG. 1;

FIG. 6 is a front view showing a lever member of the binding device shown in FIG. 1;

FIG. 7 is a front view showing a case of the binding device shown in FIG. 1;

FIG. 8 is an illustrative view showing a main part of the binding device shown in FIG. 1;

9 is an illustrative view showing a movement of a lever member of the binding device shown in FIG. 1 as viewed from a side.

10A is a cross-sectional view illustrating a state in which a binding rod of the binding device shown in FIG. 1 is closed, and FIG. 10B is a cross-sectional view illustrating a state in which the binding rod is opened. .

FIG. 11 is an illustrative view showing a modified example of a main part of the binding device shown in FIG. 1;

FIG. 12 is a perspective view showing a conventional binding device as a background of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 binding device 12 case 16 mounting piece 18 mounting hole 20 locking projection 22 pedestal portion 24 bearing portion 28 holding member 30 movable piece 32 binding rod 34 leverage member 36 connecting piece 38 pressing piece 40 pivot 42 shiatsu pressure piece 44 working hole

Claims (4)

[Claims] 1. A holding member which is formed to have elasticity and is arranged to extend substantially parallel to one side of a sheet to be bound, while being urged inward from both widthwise outsides inside the holding member. A movable piece that is housed and bendably provided, one end of which is fixed to the movable piece, the other end of the movable piece is provided to extend outside the holding member, and the other end has a width corresponding to the bending of the movable piece. A substantially annular binding rod that opens and closes in the direction, and is provided at both ends in the length direction of the holding member, one end of which is arranged to face the movable piece in the holding member, and the other end of which is the holding member. A binding device that includes a lever member that is formed to extend outside the member and that presses the other end portion, whereby the one end portion bends the movable piece to open the binding rod, wherein the lever member is A plurality of sheets are bound by the binding rods, and A binding device formed so as to extend in the thickness direction of the sheet through a gap generated between edges of the sheet facing in the width direction when arranged in a two-page spread state. 2. A case formed with an opening in the thickness direction and arranged to extend substantially in parallel with one end side of a sheet to be bound; formed with elasticity, the opening of the case; A holding member detachably attached to the portion, a movable piece which is housed inside the holding member while being urged inward from both widthwise outer sides, and is provided in a bendable manner, one end of which is fixed to the movable piece; An end portion is provided to extend outside the holding member, and the other end portion is opened and closed in the width direction with the bending of the movable piece. It is rotatably supported, and one end is arranged to face the movable piece in the case, the other end is formed to extend outside the case, and the other end is pressed by finger pressure. Rotate in the thickness direction about the pivot axis, The one end portion includes a lever member for bending the movable piece to open the binding rod by bending the movable piece, wherein the lever member is configured to transmit the finger pressure to the movable piece, and the transmission section. A pivot protruding on both sides in the width direction of the binding rod; one end having the transmitting portion, and the other end being formed so as to expand in a direction orthogonal to a direction in which the pivot extends, and applying a plurality of the sheets to the binding rod. Acupressure pieces arranged to extend in the thickness direction of the paper through gaps formed between the opposite sides in the width direction when each is pierced and arranged in a spread state on both sides in the width direction. , Bindings. 3. The case includes a locking projection formed at an edge of the opening, and a pedestal formed to face the locking projection in a thickness direction. 3. The holding member is detachably held between a portion and the pedestal portion so that the holding member can be removed from the case.
The binding device described in. 4. At both ends in the longitudinal direction of the case, a mounting piece having a mounting hole for mounting a fixing tool for fixing to the spine is integrally formed, and the lever member further includes the transmission member. A connection piece formed between the portion and the acupressure piece so as to face the attachment piece in the thickness direction, wherein a work hole for inserting the fixing tool communicates with the attachment hole. The binding device according to claim 2, wherein the binding device is formed by squeezing.