JPH1086574A - Binder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binder reinforced at least over a longitudinal length of the binder by dispersing a local force by swinging a lever. SOLUTION: A sheet binding means 2 is constituted by a board.21 having a band-like state substantially equal to a longitudinal length of the binder 1, a first wall 31 stood in a flat plate state, a second wall 32 stood at an interval from the first wall at its inside, a lever member 22 extended into the gap between the first and second walls 31 and 32 and supported at its one end rotatably to a longitudinal upper end of the board 21, a spring member 23 fixed at its one end to the member 22 to elastically upwardly biased at free end of the member 23 and extended at its other end onto the board 21 at inside of the wall 32, and a retaining member 24 pressed in a direction of the board 21 by elastic force of the member 23 when free end of the member 22 is pressed down and sandwiching a corner of a sheet between the member 22 and the board 21. Thus, the means 2 is mounted at the free end edge of a front cover 11 of the binder body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binder for binding a plurality of paper sheets by elastically pressing a part of the sheets with a pressing member.

[0002]

2. Description of the Related Art In the case of storing or carrying a plurality of paper sheets such as materials and originals, it has been widely practiced to detachably bind them to a binder. Such binders include:
A so-called loose-leaf type in which a plurality of holes are formed at the left corner of a paper sheet and a metal or synthetic resin pipe or band provided in a binder is passed through these holes is widely used. However, such a loose-leaf type binder needs to be provided with holes in the paper sheet, which not only damages the paper sheet, but also handles the paper sheet messyly or repeatedly binds the paper sheet several times. During turning, there is a disadvantage that the hole is broken and the sheet cannot be bound.

[0003] Therefore, there is provided a binder provided with a pressing member at the boundary between the back cover and the spine of the back cover or at the upper end of the back cover so as to press the left side or upper end of the sheet to be bound. . The holding member is rotatably supported at one end by a lever having one end rotatably supported, and opened when the free end side of the lever is lifted, and when the free end side of the lever is turned so that the lever is horizontal, the back side is held. A pressing member is formed in a band shape that is elastically pressed toward the cover and presses the left side of the sheet to be bound.

[0004] Such a binder is not only easy to bind and remove the paper sheet as described above, but also makes it possible to pass a pipe, a band, a binding string or the like for binding the paper sheet. Since there is no need to make holes, the paper sheet is not damaged. However, since the pressing member presses one side of the sheet over a certain length, there is a drawback that it becomes difficult to turn when a large number of sheets are bound. Further, in the case of a relatively large paper sheet such as A4 or B4, the elasticity of the paper is larger than that of B5 or the like, and a strong pressing force is required for the pressing member. However, if the spring elasticity is increased in order to obtain a strong pressing force, a strong force is required for the rotation of the lever, and there is a drawback that it becomes difficult to handle.

Accordingly, the present applicant has filed Japanese Patent Application No. Hei 6-330420.
In the issue, a paper binding device that holds a corner of a paper sheet so as to be elastically pressed is proposed. The paper binding device has a rectangular base and one end rotatably supported at a corner of the base,
A lever extending parallel to one edge of the base, one end of which is fixed to the lever to resiliently bias the free end of the lever upward, and the other end being a side surface on one edge side of the base of the lever; A spring member extending on the base on the side surface opposite to the base member, and attached to the other end of the spring member. A pressing member for holding the corner of the paper sheet between the base and the pressing member, and locking means for locking the lever so as to maintain the state when the free end of the lever is pressed downward. I have.

In this paper binding device, when a lever whose free end is locked downward by locking means is released from the locking means, the free end of the lever is rotated upward by a spring member, and the pressing member is pressed. The elastic pressing on the base by the is released. Here, the corner of the paper sheet is applied between the base and the pressing member, and the free end of the lever is pressed downward to lock the lever again with the locking means, so that the pressing member is elastically movable with respect to the base. And the corners of the paper sheet are firmly clamped between the pressing member and the base. Since the pressing member presses the corner of the paper sheet which is normally a blank part, it does not cover the description on the paper sheet. In addition, since the narrow part of the corner of the paper sheet is held down, even if the paper sheet is bent from this part, the repulsive force of the paper sheet generated by bending is weak, and many sheets are bent from those corners. The overall repulsion does not increase even if it is opened. Therefore, even if a large number of paper sheets are sandwiched and turned over, they do not come off from between the pressing member and the base, and can be securely clamped.

[0007]

In the above-mentioned invention, the paper binding device is attached to the boundary between the back cover and the back cover of the binder, and the binder is elastically pressed at the corners of the paper for binding. It is also proposed that the base is smaller than the size of the back cover, the force associated with opening and closing the lever acts locally on the top of the back cover, and the back cover is May deform from part. In the spine portion, the binder reinforces the strength in the thickness direction of the binder, but the thickness direction is only a part of the spine length direction, and the other portions are not reinforced. However, it is also conceivable that a part without a binding tool may be deformed under the condition of external force.

Accordingly, a first object of the present invention is to disperse a local force even when a local force is applied to the cover of the binder by opening and closing the lever, and to reinforce the binder at least over the longitudinal length of the binder. It is to provide.

A second object of the present invention is to provide a binder in which a portion for storing a writing instrument such as a pencil or a ball-point pen is provided in a sheet binding means.

A third object of the present invention is to provide a binder which can be formed in a box shape in which the thickness of the spine becomes thick when the binder body is closed.

[0011]

In order to achieve the first object, the first means comprises a front cover, a back cover, and a spine located between the front cover and the back cover. And a sheet binding means provided on one of the front cover and spine, wherein the sheet binding means is equal to or longer than the longitudinal length of the binder. A strip-shaped substrate portion having a slightly shorter length, and a length in the thickness direction, which is a length extending at one end in the longitudinal direction of the substrate portion and perpendicular to the longitudinal direction of the spine, is slightly shorter. A first wall portion standing upright in a flat plate shape, a second wall portion standing inside the first wall portion at an interval from the first wall portion, and a gap between the first and second wall portions; Extending into the
A lever member having one end rotatably supported at the upper end in the longitudinal direction of the substrate, and one end fixed to the lever member to resiliently bias the free end of the lever member upward,
The other end has a spring member extending on the substrate portion inside the second wall portion, and is swingably attached to the other end of the spring member. When the free end of the lever member is pressed downward, the elasticity of the spring member is reduced. A pressing member pressed in the direction of the substrate by the force and holding the corner of the sheet between the substrate and the substrate, and a lever member locked so as to maintain the state when the free end of the lever member is pressed downward. Locking means for locking.

In order to achieve the second object, a second
Means for reducing the length of the lever member in the first means to approximately half or less of the longitudinal length of the substrate portion, and in the gap excluding the portion where the lever member is located, the edge of the free end of the lever member Partition walls are formed to partition the vicinity and the other end in the longitudinal direction of the first and second walls, respectively, and gaps partitioned by the partition walls are used as writing implements.

In order to achieve the second object, in the third means, the upper part of the writing implement case in the second means is covered with a lid having one end pivotally attached to the first and second walls. ing.

In order to achieve the above third object, the fourth object
In the above means, the substrate portion in each of the above means is fixed so that the wall surface of the first wall portion is aligned with the back surface of the edge of the front cover facing the spine of the binder main body.

[0015] To achieve the third object, the fifth means is to provide, on the back cover of the binder body, two edges forming two lower corners of an end opposite to the spine of the back cover. A holder piece having sides fixed thereto is provided.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which a binder is opened and a lever member and a cover are lowered in one embodiment, FIG. 2 is a perspective view showing a state in which a material sandwiched between the binders in FIG. 1 is opened, and FIG. Fig. 2 shows the leaf binding means
FIG. 4 is a cross-sectional view taken along line AA of FIG. 1, FIG. 4 is a perspective view showing a state in which the binder in FIG. 1 is closed, and FIG. FIG. 6 is a plan view showing the pivoting portion of the lever member and the holding member in a state where the lever member is lowered, and FIG.
Is a partially cutaway perspective view showing a state in which the distal end of the metal spring member is inserted into the pressing member, and FIG. 8 is a view schematically showing a state in which the pressing member presses the material.

The binder according to the present invention comprises a binder body 1 and sheet binding means 2. The binder body 1 is made of a relatively thick cardboard or synthetic resin sheet, and the front cover 11, the back cover 12, and the spine 13 are integrally formed. In the boundary and the boundary between the back cover 12 and the back cover 13, a folding line 1 is used.
4 and 15 are formed. Note that the front and back names are tentative names, and 12 may be referred to as the front cover and 11 may be referred to as the back cover. At the lower corner of the back surface of the back cover 12 on the free edge side, a holder piece 16 having a substantially right-angled triangle is provided. The holder side 16 has two orthogonal sides fixed to two orthogonal sides of the lower corner of the back cover 12, and the inclined side is open.

The sheet binding means 2 is attached to the back surface of the front cover 11 on the free edge side of the front cover 11 opposite to the spine 13 of the binder body 1. The sheet binding means 2 is made of synthetic resin or metal, and has a rectangular substrate portion 21 on which one edge of a sheet to be bound is placed, and one end of which is rotatable on the substrate portion 21. A supported lever member 22 made of the same synthetic resin, a spring member 23 made of a metal wire for resiliently biasing the free end of the lever member 22 upward, and one end of the spring member 23 When the free end of the lever member 22 is pressed downward,
A pressing member 24 made of synthetic resin sandwiching the corners of the document 3 between it and a lid 25 made of synthetic resin or metal, which is rotatably attached to a substrate below the lever member 22 and mainly made of synthetic resin or metal. Is configured.

The substrate portion 21 has a length equal to or slightly shorter than the length of the spine 13 in the longitudinal direction, and has a band shape having a predetermined width. The substrate portion 21 extends upright at one edge in the vertical direction, and its length in the height direction is substantially equal to or slightly equal to the length in the thickness direction which is the length orthogonal to the longitudinal direction of the spine 13. A first wall portion 31 erected in a flat plate shape with a short length, and a second wall portion 32 erected inside the first wall portion 31 at an interval corresponding to at least a width of the lever member 22. A third wall portion 33 erected so as to protrude from the upper ends of the first wall portion 31 and the second wall portion 32 to the inside of the upper end of the substrate portion 21; and the first wall portion 31 and the second wall portion 32. A fourth wall portion 34 erected between the lower end portions and a fifth wall portion 35 provided between the first and second wall portions 31 and 32 near the edge of the free end of the lever member 22 are provided. ing. A mounting surface 26 on which the left edge of the document 3 is mounted is formed inside the second wall 32 of the substrate 21.

As described above, the first portion above the fifth wall portion 35
The gap between the first and second wall portions 31 and 32 is a gap for the lever member 22, and the gap between the first and second wall portions 31 and 32 partitioned by the fourth wall portion 34 and the fifth wall portion 35 is formed. In FIG. 1, a writing implement holder 37 is provided for holding a writing implement 36 such as a pencil or a ball-point pen indicated by a dotted line.

As shown in FIG. 1, a locking projection 38 is formed on the first wall 31 between the first and second walls 31 and 32 in which the lever member 22 enters. Is engaged with a groove (not shown) formed on the side surface of the lever member 22 on the side of the first wall portion 31 when the lever member 22 is lowered to hold the lever member 22 in a lowered state. is there. Further, when the lever member 22 is further lowered, the first wall portion 31 is located below the first wall portion 31 near the locking projection 38.
An inclined guide 39 is formed which engages with the side surface on the side to guide the lever member 22 away from the first wall 31.

The lever member 22 is formed integrally with an upper plate portion 41 and a peripheral surface portion 42 extending downward from the outer periphery of the upper plate portion 41. A shaft hole (not shown) for rotatably attaching to a support shaft 43 extending between upper end portions of the first and second wall portions 31 and 32 is formed in the peripheral surface portion 42 on one end side of the lever member 22. Has been established. An end of the upper plate portion 41 facing the support shaft 43 has an inclined surface 44 that is inclined obliquely downward from the upper plate portion 41 to the peripheral surface portion 42 located on the first wall 31 side.
Is formed, and the inclined surface 44 serves as a fingerhold for operating the lever member 22. A horizontal rail 45 is formed between the opposed peripheral surface portions 42 at a substantially central portion of the lever member 22 at an interval from the rear surface of the upper plate portion 41.

The spring member 23 is made of a metal wire having a spring property. As shown in detail in FIGS. 5 and 6, the spring member 23 is a central coil portion 51 and one end of the coil portion 31. It has a linear locking end portion 52 locked to the horizontal rail 45 of the member 22 and a holding end portion 53 which is the other end of the coil portion 51 and rotatably holds the pressing means 24, The locking end 32 and the holding end 53 are elastically biased by the coil 31 in directions opposite to each other. The locking end portion 52 and the holding end portion 53 are configured to have a predetermined angle around the coil portion 31 when no load is applied. The axial length of the coil portion 51 is shorter than the interval between the opposing peripheral surface portions 42 of the lever member 22. The holding end portion 33 is bent substantially at right angles outward from the substantially middle portion in a direction opposite to the locking end portion 52, and a bent portion 54 is formed. The tip portion 55 of the bent portion 54 is further bent at a substantially right angle in the direction of the coil portion 51. As shown in FIG. 8, the bent portion 54 is bent so as to form a chevron with a substantially middle portion raised, and the apex portion 56 is set to be a portion protruding from the pressing member 24. I have. The second wall portion 32 includes a bent portion 5
A groove 57 for allowing the passage of the groove 4 is formed.

The holding member 24 is made of a hard synthetic resin such as polycarbonate, for example, and has a substantially right triangle upper surface 61 and three substantially trapezoidal side surfaces 62, 63 and 64, respectively. The lower surface is open. The side surface portion 62 is located on the upper end side of the mounting surface 26 of the substrate portion 21, the side surface portion 63 is located on the second wall portion 32 side, and the side surface portion 6
2 and 63 intersect at a substantially right angle. In addition, the side surface portion 64 is positioned so as to be an inclined side of a right triangle. As shown in FIG. 6, an insertion groove 65 into which the bent portion 54 of the spring member 23 is inserted is formed from the upper surface portion 62 to the side surface portion 63. The position of the insertion groove 65 is
As shown in FIG. 5, when lifted by the spring member 23, the side portion 62 is set to a position at which the side portion 62 hangs down due to its own weight. As shown in FIG. 7, a U-shaped wall portion 66 is formed integrally with a lower portion of the upper surface portion 61 so as to form an outline of the insertion groove 65. A hole 67 into which the distal end portion 55 of the spring member 23 is inserted is formed in a portion of the wall portion 66 on the side surface portion 64 side. At the upper end of the opposing wall 66, that is, at the entrance of the insertion groove 65, a tapered projection 68 is formed to slightly narrow the insertion groove 65 while being inclined downward, and the bent portion 54 of the spring member 23 is press-fitted. After that, it is configured to hold so as not to be easily detached.

The lid 25 of the writing instrument holder 37 includes an upper plate 71 that covers an opening between the first and second walls 31 and 32,
Side plates 72 extending downward from both ends in the longitudinal direction of the upper plate 71 are provided. Shaft holes 73 are respectively formed in both side surface portions 72 on one end side of the lid 25, and these shaft holes 73 are opposed to the first and second wall portions 31 and 32 near the fifth wall portion 35. Are fitted to the support shafts 74 protruding from each other. The side wall 72 on the second wall 32 side on the other end side of the lid 25 is cut out to form the notch 7.
5 are formed. The notch 7 is also provided in the second wall 32.
The portion corresponding to No. 5 is cut out to form a notched portion 76. As a result, the notch portion 75
The lid 25 can be opened by putting a finger in the box and lifting it upward. Reference numeral 77 denotes a locking projection for maintaining the state when the lid 25 is closed, and is engaged with a groove (not shown) formed in the second wall portion 32 when the lid 25 is closed.

When using the binder constructed as described above, first, the binder body 1 is opened, and the lever member 22 is opened.
A finger is put on the inclined surface 44 and is pushed down. Slope 4
4 can move the lever member 22 downward while shifting the lever member 22 sideways.
The lever member 22 can be raised so that the second groove does not engage. Further, in this embodiment, since the inclined guide 39 is provided, the lower end of the peripheral surface portion 42 near the inclined surface 44 of the lever member 22 is engaged with the inclined guide 39, and the entire lever member 22 is securely moved to the first position. The locking projection 38 and the groove of the lever member 22 can be reliably released by a simple operation of simply pushing down the lever member 22 in a downward direction so as to be displaced toward the two wall portions 32. Can be. Thereby, the free end side of the lever member 22 is raised by the spring member 23, and the pressing member 24 is also separated from the mounting surface 26 of the substrate portion 21. When the pressing member 24 is separated from the substrate portion 21, the side portion 62 is positioned so as to hang down by its own weight. Therefore, when the document 3 is inserted between the mounting surface 26 of the substrate portion 21 and the pressing member 24, the pressing member 24 It is not necessary to work such that the top and bottom are reversed and the holding member 24 is installed at a correct position. On the other hand, even if the holding member 24 is about to rotate, the distal end portion 55 of the spring member 23 is
Rotation is prevented by abutting on the upper surface 61 and the rear surface of the peripheral surface 64 of the base 4.

Here, the left end and the upper end of the material 3 are placed on the mounting surface 26 of the substrate 21 so that the left end and the upper end thereof are aligned with the second wall portion 32 and the third wall portion 33, and the free end of the lever member 22 is lowered. Then, first, the pressing member 24 is positioned so as to press the upper left corner of the document 3 and presses the upper left corner of the document 3. Further, when the free end of the lever member 22 is lowered against the elastic force of the spring member 23, the lever member 22 is lowered while being elastically pressed against the first wall, and the locking projection is formed in the groove of the lever member 22. 38 is locked to hold the free end of the lever member 22 in a lowered state. As a result, the holding member 24 is
Is elastically pressed against the mounting surface 26 of the substrate 3, so that the corners of the material 3 are firmly held between the holding member 24 and the mounting surface 26 of the substrate 21. Document 3 which is usually blank
If the pressing member 24 presses the corner of the document 3, the pressing member 24 does not cover the described items on the document 3.
Further, the lever member 22 is connected to the first wall 3 by the spring member 23.
Since it is elastically pushed in one direction, the locked state between the groove of the lever member 22 and the locking projection 38 is not released.
Since the holding member 24 further abuts on a narrow portion such as a corner portion of the material 3, as shown in FIG. 2, even if the material 3 is bent from this portion and turned, the repulsive force of the material 3 generated by the bending does not increase. Even if a large number of materials 3 are opened by bending them from their corners, the overall repulsion does not increase. Therefore, even if a large number of materials 3 are sandwiched and turned over, the holding member 24 and the mounting surface 26
The material 3 does not come off from between, and can be reliably held.

When the binder is, for example, A4 size, not only the material 3 having the size of A4 but also the material 3A of A3 which is twice as large as shown by the two-dot chain line can be closed. In this case, the upper left corner in FIG. 1 of the document 3A is sandwiched between the holding member 24 and the mounting surface 26 of the substrate 21, but other portions are not sandwiched. In the case where there is a possibility that the sides may become loose and become unsteady, or when transporting, the lower right end corner of the material 3A may be inserted into the holder piece 16. When the binder is closed as shown in FIG. 4, almost the center of the material 3A is bent, but this bent portion is located on the spine 13 side, and may be bent to at least the thickness of the spine 13 or less. Since there is no material, the material 3A has a slight curvature at almost the center. Further, even if a strong force is applied to the closed binder from the outside, the spine 13 protects the bent portion of the material 3A, and the spine 13 is not strongly folded. In addition, the holder piece 16 may be used for inserting a small material such as a memo or paper in addition to stopping the free end side of such a large material.

Since the substrate 21 has a length substantially equal to the length of the spine 13 in the vertical direction, the force applied when the lever member 22 is rotated can be diffused along the substrate 21. However, it does not locally join the front cover 11 of the binder body 1. Therefore, the front cover 11 in the vicinity of the rotation fulcrum of the lever member 22 of the front cover 11 is not deformed, and can be used for a long time. Further, the sheet binding means 2 is connected to the front cover 11 of the binder body 1.
4, the spine 13 can be combined into a substantially box-like shape in which the thickness of the spine 13 becomes the depth when bound, as shown in FIG. Therefore, when the book is stored in a cabinet or the like, it can be arranged in the same manner as a book without having a horizontal cross section of a triangle with the spine of the binder serving as the base, so that it can be stored neatly. Also, when carrying a binder, the front cover 11 and the back cover 12 are parallel to each other, so that the front cover 11 and the back cover 12 can be easily held and stably bundled with the book.

Further, in this embodiment, the bent portion 54 of the lever member 22 is bent so as to form a chevron with a substantially middle portion raised, and a vertex 56 of the bent portion 54 protrudes from the pressing member 24. 8, the holding member 24 has a lower surface even when the material 3 is thick as shown by a two-dot chain line, in addition to the case where the material 3 is thin as shown by a solid line in FIG. Since it can rotate so as to be opposed to the surface of the material 3 in parallel, a thick material can be firmly held.

In the above-described embodiment, the sheet binding means 2 is attached to the back side of the front cover 11 of the binder body 1 on the free edge side. However, like the conventional binder, the back cover of the back cover is used. The sheet binding means 2 may be attached to the boundary with the sheet 13. In this case, when the binder is closed, spine 1
Since the first wall portion 31 of the substrate portion 21 is positioned so as to abut on the spine 3, the spine 13 can be prevented from being bent by an external force, and a strong binder can be provided. .

Further, in the above-described embodiment, the binder main body 1 and the substrate 21 are made as separate bodies, but the binder main body 1 and the substrate 21 may be made of synthetic resin by integral molding. . In this case, the folding lines 14, 15
May be formed by hinge processing.

[0033]

As is apparent from the above description, according to the first aspect of the present invention, the sheet binding means has a band shape having a length equal to or slightly shorter than the longitudinal length of the binder. Since the base portion has a base portion, even if a local force accompanying the rotation of the lever member is applied to the cover of the binder, the force can be dispersed by the base portion, and reinforced over the longitudinal length. A binder can be provided. Thus, the binder body can be made of a thinner cardboard or a sheet of synthetic resin than before, and a lightweight and easy-to-handle binder can be provided.

According to the second aspect of the present invention, the lever member is accommodated between the first and second wall portions, and the remaining portion is partitioned by the partition wall to form a writing implement case.
If a writing instrument such as a pencil or a ball-point pen is inserted here, necessary information can be written immediately when the user notices a document or a document fixed on the binder.

According to the third aspect of the present invention, since the lid is provided on the upper part of the writing implement holder in the second aspect of the present invention, it is possible to prevent the writing implement from being lost by closing the lid. it can.

According to the fourth aspect of the present invention, the substrate portion is attached to the back surface of the edge of the front cover of the binder body, and the wall surface of the first wall portion is aligned with the edge of the front cover. Because it is fixed so that it is positioned, it can be formed into a rectangular box shape where the thickness of the spine becomes the depth when the binder body is closed, not only convenient for carrying, but also leaning against a cabinet etc. In this case, they can be arranged straight in parallel with the cover of the next binder.

According to the fifth aspect of the present invention, when a paper sheet having a binder body having an expanded size is bound, the free end of the paper sheet is inserted into the holder piece, so that the paper sheet can be transported. Not only can prevent the paper from fluctuating, but also because the thickness of the spine protects the bent part of the paper sheet from external pressure, so that even when external pressure is applied to the binder, the paper sheet is bound without forming a sharp fold line. I can put it. Furthermore, paper sheets such as small memos can hold paper sheets in this holder piece,
It can be prevented from being lost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a binder according to an embodiment of the present invention is opened and a lever member and a lid are lowered.

FIG. 2 is a perspective view showing a state in which a material sandwiched between binders in FIG. 1 is opened.

FIG. 3 is a cross-sectional view showing the sheet binding means cut along the line AA of FIG. 2;

FIG. 4 is a perspective view showing a state in which a binder in FIG. 1 is closed.

FIG. 5 is a perspective view showing a pivot portion and a holding member of the lever member with the lever member raised.

FIG. 6 is a plan view showing a pivot portion and a holding member of the lever member in a state where the lever member is lowered.

FIG. 7 is a partially cutaway perspective view showing a state in which a distal end portion of a spring member is inserted into a pressing member.

FIG. 8 is a view schematically showing a state in which a pressing member presses a material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Binder main body 2 Paper binding means 3, 3A Material 11 Front cover 12 Back cover 13 Back cover 16 Holder piece 21 Substrate part 22 Lever member 23 Spring member 24 Pressing member 25 Cover 26 Mounting surface 31 First wall portion 32 second wall part 33 third wall part 34 fourth wall part 35 fifth wall part 36 writing tool 37 writing tool holder 38 locking projection 41 upper plate part 42 peripheral surface part 44 inclined surface 51 coil part 52 locking end part 53 holding end Part 54 Bend part 55 Tip part 71 Upper plate part 72 Side part

Claims (5)

[Claims] 1. A binder body comprising a front cover, a back cover, and a spine located between the front cover and the back cover, and a binder main body provided on one of the front cover and the back cover. A sheet binding unit, wherein the sheet binding unit is a band-shaped substrate having a length equal to or slightly shorter than the longitudinal length of the binder,
A first plate extending up to one edge in the longitudinal direction of the substrate portion and having a height substantially equal to or slightly shorter than the length in the thickness direction, which is a length perpendicular to the longitudinal direction of the spine, is erected in a flat plate shape. A wall, a second wall erected inside the first wall at an interval from the first wall, and extending into a gap between the first and second walls; A lever member rotatably supported at a longitudinal upper end of the portion, one end fixed to the lever member to resiliently bias the free end of the lever member upward, and the other end being the second wall portion A spring member extending on the substrate portion inside the base member; and a swingably attached to the other end of the spring member. When the free end of the lever member is pressed downward, the elastic force of the spring member causes the substrate to move. A pressing member that is pressed in the direction of the paper and holds the corner of the paper sheet between itself and the substrate; Binder, characterized in that it comprises a locking means for locking the lever member so as to retain its state when pressing the free ends of the over member downward. 2. The device according to claim 1, wherein the lever member has a length substantially equal to or less than a half of a length of the substrate portion in a longitudinal direction, and a free end of the lever member is provided in the gap except a portion where the lever member is located. Partition walls are formed to partition the vicinity of the edge and the other end in the longitudinal direction of the first and second walls, respectively, and the gaps partitioned by these partition walls are used as a storage for writing utensils. The binder according to claim 1, wherein 3. The binder according to claim 2, wherein an upper end of the writing implement case is covered at one end with a lid pivotally attached to the first and second walls. 4. The board portion is fixed to a back surface of an edge of the front cover facing the spine of the binder body such that a wall surface of the first wall portion is aligned. The binder according to any one of claims 1 to 3, wherein: 5. The back cover of the binder body has a holder piece having two sides fixed to two edges forming a lower corner of an end of the back cover facing the spine. 5. The binder according to claim 4, wherein a sheet is sandwiched between the holder pieces.