JP2005335335A - Binding implement and file - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of components and that of manufacturing processes in regard to a binding implement which has a cover part fitted to a cover body and binding members provided in a pair and supported turnably by the cover part and wherein the paired binding members have respectively ring elements which form a closed or opened state together with the cover body by engaging with or disengaging from each other. <P>SOLUTION: Projecting pieces 2c which are elastic urging means to urge the first binding member 3 and the second binding member 4 for the opened state are provided in a part of the cover part 2, while the first and second binding members 3 and 4 have respectively the ring elements 31 and 41, rotary shaft parts 32 and 42 supported turnably by the cover part 2 and elastic force receiving parts 33 and 43 receiving actions from the projecting pieces 2c. These are formed integrally out of one linear member. The binding implement T having such a constitution is prepared. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a binding tool for binding documents and the like, and a file to which the binding tool is applied.

Conventionally, various binding tools used for files, binders, and the like for binding documents have been devised. Among such binding tools, what is called a ring-type binding tool includes a cover a1, a first connecting portion a2 that is a separate member from the cover a1, and a cover a1 as shown in FIG. The base a is generally composed of the second connecting portion a3, and the first ring element b and the second ring element c are paired with each other. As a configuration of such a binding tool t, for example, a coil spring a4 serving as an opening means for applying an acting force to the base a only in the direction of releasing the engagement of the first ring element b and the second ring element c. It is conceivable to provide a leaf spring, a linear spring, or the like so that the acting force is accumulated only in the direction in which the first ring element b and the second ring element c are opened to each other (for example, Patent Document 1). That is, the opening means such as the coil spring a4 should apply a force so that the first connecting plate a2 and the second connecting plate a3 are in a mountain-shaped posture, and the first ring element b and the second ring element c are opened. It is provided. In Patent Document 1, the first ring element and the second ring element are described as a first binding element and a second binding element, respectively.
JP 2003-251973 A

  However, in the configuration of Patent Document 1 described above, it is necessary to prepare the first connecting portion and the second connecting portion separately from the cover, and the step of attaching the first connecting portion and the second connecting portion to the cover. And a step of fixing the first ring element and the second ring element to the first connecting plate and the second connecting plate by welding or caulking, respectively.

  As an aspect for solving the former problem, it is interposed between a cover part, a support plate part that supports a pair of binding elements, and a side edge of the cover part and a side edge of the support plate part. A device in which the bent portion is formed by an integral member is considered (see, for example, the specification of Japanese Patent Application No. 2004-051006). However, such a configuration still does not solve the problem of requiring a step of fixing the first ring element and the second ring element to the support plate portion by welding or caulking, respectively.

  The present invention is configured to solve the above problem, that is, to reduce the number of parts and the number of manufacturing steps, and to further reduce the manufacturing cost.

  That is, the binding tool according to the present invention includes a cover portion attached to the cover body and a binding member that is provided in a pair and rotatably supported by the cover portion. Each having a ring element that forms a closed state or an open state together with the cover portion by engaging and disengaging with each other, and the binding member is placed in either the closed state or the open state on a part of the cover portion. Elastic binding means for biasing toward each other, and each of the binding members is provided on the ring element, a rotation shaft portion rotatably supported by the cover portion, and the elastic biasing means. The elastic force receiving portion that receives the action from the elastic urging means by abutting is integrally formed by a single linear member.

  The file according to the present invention includes a cover body and the above-described binding tool attached to the cover body.

  In such a case, since the ring element, the rotation shaft portion, and the elastic force receiving portion are integrally formed on a binding member that is a single linear member, the elastic force receiving portion is formed. The portion abuts on the elastic urging means to receive the elastic force for urging the binding member, and therefore the members corresponding to the first connection portion and the second connection portion in Patent Document 1 described above are not necessary. The number of parts can be reduced. Further, since the process of fixing the ring element to the first connecting portion and the second connecting portion is not necessary, the manufacturing man-hour can be reduced, and therefore the manufacturing cost can be further reduced.

  As an aspect which can realize further reduction in the number of parts, there is one in which the elastic urging means is provided by using a part of the cover part. If it is such, it is because the said cover part and the said elastic biasing means can be comprised using the same member. Further, when such a configuration is adopted, the elasticity is increased as compared with the configuration having the first connection portion and the second connection portion that extend to the full length of the cover portion as in the configuration described in Patent Document 1. Since the biasing means is configured using only a part of the cover part, the operation force required for the operation to change from the closed state to the open state or vice versa can be reduced, and a smooth operation can be realized. Will be able to.

  As an aspect in which such elastic urging means can be realized by a simple process, there is one in which the elastic urging means of the cover part is formed by bending.

  As a mode in which the binding member can be effectively biased even if the elastic biasing means has a small spring coefficient, the rotation shaft portions of the binding member are respectively supported at both side edges of the cover portion. In addition, the elastic force receiving portion is positioned closer to the center in the width direction of the cover portion than the rotating shaft portion, and rotates in the direction of rotating around the central axis of the rotating shaft portion from the elastic biasing means. Those that receive the elastic force of. In this case, since the elastic force receiving portion is biased from the rotating shaft portion toward the center in the width direction of the cover portion, the binding member receives the elastic force receiving portion via the elastic force receiving portion. This is because the moment can be increased. In addition, it is possible to adjust a moment of force that the binding member receives via the elastic force receiving portion by adjusting a deviation amount of the elastic force receiving portion from the rotating shaft portion.

  Further, as a configuration for enabling the opening width to be increased in the open state, a storage portion capable of storing the elastic force receiving portion in the open state is provided at a position facing the elastic force receiving portion of the cover portion. The thing which is made to protrude in the direction to separate is mentioned. If it is such, it will become possible to move the said ring element further outside by accommodating the said elastic-force receiving part in the said accommodating part.

  The elastic biasing means biases the binding member toward the open state so that the operation of changing the binding member to the open state can be easily performed and the binding members can be brought into close contact with each other. An engagement portion is provided at the tip end portion of the ring element provided on one binding member, and the engagement portion is engageable with the engagement portion at the tip portion of the ring element provided on the other binding member. When the engagement portion and the engaged portion are engaged to form a closed state together with the cover portion, the engagement portion and the engaged portion are acted on by the action of the elastic biasing means. What has the structure which a joint part closely_contact | adheres is mentioned. In such a case, the binding member is biased to the open state when the engagement between the engaging portion and the engaged portion is released.

  As a configuration for making it easier to change the binding member to the open state, a ring element is provided at one end of one of the pair of binding members, and the end of each ring element is engaged. The joint portions are provided so as to be separated from each other, and ring elements are provided at the other end portions of the pair of binding members, and the engaged portions are provided opposite to each other at the tip portions of the respective ring elements. Things. In such a case, the engagement between the engaging portion and the engaged portion is released by pressing the two ring elements of the one binding member in a direction close to each other.

  Since the elastic urging means for urging the binding member is provided in a part of the cover portion, and the ring element and the elastic force receiving portion are integrally formed on one linear member, the elastic force A receiving part can contact | abut to the said elastic urging means and can receive the elastic force which urges | biases the said binding member, and can reduce a number of parts and a manufacturing man-hour.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a file F according to this embodiment is used for organizing and storing documents and the like by binding documents and the like having binding holes inside thereof. The cover body 1 includes a front cover 11, a front cover 12, and a back cover 13, and a binding tool T attached to the inner surface of the back cover 13 via a rivet L.

  2 to 8, the binding tool T includes a cover portion 2 attached to the cover body 1 and a first ring element 31 inserted through a binding hole provided in a document or the like. A first binding member 3 that is movably supported and a second ring element 41 that is provided in a pair with the first binding member 3 and that passes through a binding hole provided in a document or the like. It is comprised by the 2nd binding member 4 supported so that a movement is possible. The first ring element 31 and the second ring element 41 are in a closed state in which a closed ring is formed with the cover portion 2 and in an open state in which the first ring element 31 and the second ring element 41 are separated from each other. It is possible to change between. In the closed state, FIG. 2 is a perspective view, FIG. 3 is a bottom perspective view, the solid line in FIG. 4 is a plan view, the solid line in FIG. 5 is a bottom view, and the solid line in FIG. It has a shape as shown in each cross-sectional view. On the other hand, in the open state, the imaginary line in FIG. 4 is a plan view, the imaginary line in FIG. 5 is a bottom view, the imaginary line in FIG. 6 is the central cross-sectional view in FIG. 4, and the perspective view in FIG. The shape shown in FIG. 8 is a bottom perspective view. In this embodiment, the binding tool T is attached to the back cover 13. However, it goes without saying that the binding tool T can be used by being attached to the spine 11 or the front cover 12. .

  Specifically, the cover 2 is not particularly limited, but is made of, for example, a thin stainless steel material, and is attached to the back cover 13 in a state of opening downward (back cover 13 side). The upper wall 2g of the cover portion 2 has an elongated shape with a curved shape with a maximum height at the center, and both end portions in the longitudinal direction of the upper wall 2g are formed in a semicircular arc shape, and a mounting surface portion 2a described later. The shape is cut out. Then, both ends in the longitudinal direction of the upper wall 2g of the cover portion 2 form a pair of stepped mounting surface portions 2a, 2a attached in contact with the back cover 13, and surfaces of the mounting surface portions 2a, 2a. One rivet hole 2b, 2b through which the rivet L is inserted is formed in the substantially central portion. Of the two side ends of the upper wall 2g of the cover part 2, a pair of projecting pieces 2c and 2c that are bent inward in the longitudinal direction are formed at the center in the longitudinal direction with a fold line (not shown) as a boundary. The protrusions 2c and 2c are bent substantially horizontally toward the inner side. That is, the protruding pieces 2 c and 2 c are formed only on a part of the longitudinal dimension of the cover portion 2. As will be described later, the protruding pieces 2c and 2c abut against elastic force receiving portions 33 and 43 provided on the first binding member 3 and the second binding member 4, respectively, and these elastic force receiving portions 33 and 43 are caused by elastic force. The first binding member 3 and the second binding member 4 function as an elastic biasing unit that biases the first binding member 3 and the second binding member 4 toward the open state by applying an action in the upward direction. On the other hand, of the both side end portions of the upper wall 2g of the cover portion 2, the first binding member 3 and the second binding member 4 are respectively provided at portions other than the pair of protruding pieces 2c and 2c. Shaft support portions 2f and 2f for supporting the moving shaft portions 32 and 42 are provided, and the first binding member 3 and the second binding member 4 are connected to the rotation shaft portions 32 and 42 via the shaft support portions 2f and 2f, respectively. It is supported so as to be rotatable around the central axis. Furthermore, a pair of first slot holes 2d, 2d for allowing the first binding member 3 to pass therethrough are formed at one end of the upper wall 2g of the cover portion 2 with a predetermined distance therebetween, A pair of second slot holes 2e and 2e for allowing the second binding member 4 to pass therethrough are formed in the side end portions of the second binding member 4 in association with the first slot holes 2d and 2d.

  Thus, the first binding member 3 is in contact with the first ring element 31, the rotation shaft portion 32 rotatably supported by the cover portion 2, and the projection piece 2 c, thereby contacting the projection piece 2 c. And the elastic force receiving portion 33 that receives the action from the single linear member. Further, the second binding member 4 is brought into contact with the projecting piece 2c by contacting the projecting piece 2c with the second ring element 41, a rotating shaft part 42 rotatably supported by the cover part 2. The elastic force receiving portion 43 that receives the above action is integrally formed by a single linear member.

  More specifically, the first binding member 3 is formed by erecting the first ring elements 31, 31 having a semicircular arc shape in front view at both ends of one wire, and the remaining portion is the The cover portion 2 extends along the longitudinal direction. Engaging portions 311 and 311 having a hook shape are provided at the distal ends of the first ring elements 31 and 31 so as to be separated from each other. Rotating shaft portions 32, 32 are formed in a portion adjacent to the first ring element 31, and the rotating shaft portions 32, 32 are connected to the width of the cover portion 2 via the shaft support portions 2f, 2f of the cover portion 2. It is supported on one side edge in the direction. An elastic force receiving portion 33 is formed at the center in the longitudinal direction. The elastic force receiving portion 33 is located closer to the center in the width direction of the cover portion 2 than the rotation shaft portions 32 and 32, receives an upward action from the projecting piece 2c, and receives the center of the rotation shaft portion 32. It is biased in the direction of turning around the axis. The portions of the first binding member 3 excluding the first ring elements 31, 31, that is, the rotation shaft portions 32, 32 and the elastic force receiving portion 33 are located below the cover portion 2, that is, on the cover body 11 side. Stored. Meanwhile, the first ring elements 31, 31 protrude upward through the first slot holes 2d, 2d.

  On the other hand, the second binding member 4 is formed by erecting the second ring elements 41, 41 having a reverse L-shape in front view at both ends of one wire, and the remaining portion is the cover portion. 2 extends in the longitudinal direction. Engaged portions 411 and 411 that are hook-shaped and engageable with the engaging portions 311 and 311 are provided at the front ends of the second ring elements 41 and 41 so as to face each other. Rotating shaft portions 42, 42 are formed in a portion adjacent to the second ring element 41, and the rotating shaft portions 42, 42 are connected to the width of the cover portion 2 via the shaft support portions 2 f, 2 f of the cover portion 2. It is supported on the other side edge in the direction. An elastic force receiving portion 43 is formed at the central portion in the longitudinal direction. The elastic force receiving portion 43 is located closer to the center in the width direction of the cover portion 2 than the rotating shaft portions 42 and 42, receives an upward action from the protruding piece 2 c, and receives the center of the rotating shaft portion 42. It is biased in the direction of turning around the axis. The portions of the second binding member 4 excluding the second ring elements 41 and 41, that is, the rotating shaft portions 42 and 42 and the elastic force receiving portion 43 are located below the cover portion 2, that is, on the cover body 11 side. Stored. On the other hand, the second ring elements 41, 41 protrude upward through the second slot holes 2e, 2e.

  In the closed state, the elastic force receiving portions 33 and 43 of the first binding member 3 and the second binding member 4 are each subjected to an upward action, so the first ring element 31 and the second ring element 41 Are pivoted around the central axes of the pivot shafts 32 and 42, respectively, and are subjected to the action of being separated from each other. However, since the engaging portion 311 and the engaged portion 411 each having a hook shape are engaged with each other, the above-described operation works as an operation for bringing the engaging portion 311 and the engaged portion 411 into close contact with each other.

  On the other hand, no action occurs between the protruding piece 2c and the elastic force receiving portions 33 and 43 in the open state.

  A storage portion 2h is provided at a position facing the elastic force receiving portions 33 and 43 of the cover portion 2 so as to protrude away from the cover sheet 1, and the binding members 3 and 4 are connected to the engagement member in the open state. The elastic force receiving portions 33 and 43 can be accommodated in the accommodating portion 2h by rotating the joining portion 311 and the engaged portion 411 in a direction away from each other. These elastic force receiving portions 33 and 43 can be rotated to a position where they abut against the upper wall of the storage portion 2h, and when the elastic force receiving portions 33 and 43 abut against the upper wall of the storage portion 2h. The separation width between the engaging portion 311 and the engaged portion 411 is maximized.

  In order to change the binding tool T from the closed state to the opened state, the first ring elements 31 and 31 are bent inward by applying an operating force in a direction close to each other, and the engaging portion 311 and the engaged portion are engaged. The engagement with the joint portion 411 may be released. Then, the protruding piece 2c applies an upward action to the elastic force receiving portion 43 of the second binding member 4, and biases the second binding member 4 to the open state side. Next, the protruding piece 2c applies an upward action to the elastic force receiving portion 33 of the first binding member 3, and the first binding member 3 is also biased to the open state side. Then, the protruding piece 2c moves from the position shown by the solid line in FIG. 6 to the position shown by the imaginary line by elastic force.

  Conversely, in order to change the binding tool T from the open state to the closed state, the elastic force from the first ring elements 31, 31 and the second ring elements 41, 41 and the protruding piece 2c is resisted. The engaging portion 311 and the engaged portion 411 may be moved toward each other until the engaging portion 311 is engaged. At this time, the projecting piece 2c moves from the position indicated by the solid line in FIG. 6 to the position indicated by the imaginary line, and applies an elastic force to the elastic force receiving portions 33 and 43.

  As described above, in the present embodiment, the first binding member 3 is formed by integrally forming the first ring element 31, the rotating shaft portion 32, and the elastic force receiving portion 33 with one linear member. In addition, the second binding member 4 is formed by integrally forming the second ring element 41, the rotating shaft portion 42, and the elastic force receiving portion 43 with one linear member. The projecting piece 2c formed on the portion and the elastic force receiving portions 33 and 43 are in contact with each other to urge the first binding member 3 and the second binding member 4 toward the open state. Therefore, unlike the configuration described in Patent Document 1 or the like, there is no need for a connecting portion to be connected to the first ring element 31 or the second ring element 41 separately from the cover portion 2, and further, such a connecting portion is connected to the cover portion. 2 and the process of attaching the first ring element 31 or the second ring element 41 to such a connecting portion can be omitted. That is, the number of parts and man-hours can be reduced, and the manufacturing cost of such a binding tool T and the file F using such a binding tool T can be reduced.

  Moreover, since the function as an elastic urging means is given to the protrusion 2c which is a part of the cover part 2, a special member for urging the first binding member 3 and the second binding member 4 is provided. There is no need, and the number of parts can be further reduced. Furthermore, since the protruding piece 2c is formed only in a part of the longitudinal dimension of the cover portion 2, the operation force required for the operation to change from the closed state to the open state or vice versa is described in Patent Document 1. Therefore, smooth operation can be realized.

  In addition, since the projecting piece 2c which is a part of the cover portion 2 is formed by bending, the elastic biasing means can be formed by a very simple process. Further, the projecting piece 2c is located below the upper wall 2g of the cover part 2, and the first and second ring elements 31 and 41 for binding paper sheets are located above the upper wall 2g of the cover part 2. The protruding piece 2c and the paper sheet do not interfere with each other, and the protruding piece 2c does not prevent the paper sheet from being taken in and out.

  The rotation shaft portions 32 and 42 of the first binding member 3 and the second binding member 4 are supported at both side edges of the cover portion 2, respectively, and the elastic force receiving portions 33 and 43 are It is located closer to the center in the width direction of the cover part 2 than the moving shaft parts 32 and 42, and receives elastic force from the projecting piece 2c in the direction of turning around the central axis of the turning shaft parts 32 and 42, respectively. Therefore, the moment of action that the first binding member 3 and the second binding member 4 receive via the elastic force receiving portions 33 and 43 can be increased. Therefore, even if the spring coefficient of the protruding piece 2c is small, The first binding member 3 and the second binding member 4 can be effectively urged. Further, the first binding member 3 and the second binding member 4 are adjusted via the elastic force receiving portions 33 and 43 by adjusting the amount of deviation of the elastic force receiving portions 33 and 43 from the rotation shaft portions 32 and 42. You can also adjust the moment of force received.

  Further, the storage portion 2h capable of storing the elastic force receiving portions 33, 43 in the opened state is protruded in a direction away from the cover sheet at a position facing the elastic force receiving portions 33, 43 of the cover portion 2. Since the elastic force receiving portions 33 and 43 are stored in the storage portion 2h, the first ring element 31 and the second ring element 41 can be moved further outward. Therefore, the open width can be increased in the open state.

  The protruding piece 2c urges the first binding member 3 and the second binding member 4 toward the open state, and an engaging portion 311 is provided at the tip of the first ring element 31, and the second ring An engaged portion 411 that can be engaged with the engaging portion 311 is provided at the tip of the element, and the engaging portion 311 and the engaged portion 411 are engaged to form a closed state together with the cover portion 2. Since the engaging portion 311 and the engaged portion 411 are in close contact with each other by the action from the protruding piece 2c, the engagement between the engaging portion 311 and the engaged portion 411 is released. Then, the first binding member 3 and the second binding member 4 are biased to the open state. Therefore, the first binding member 3 and the second binding member 4 can be brought into close contact with each other while the operation of changing the first binding member 3 and the second binding member 4 to the open state can be easily performed.

  In addition, first ring elements 31 and 31 are provided at both ends of the first binding member 3, and engaging portions 311 and 311 are provided at the distal ends of the first ring elements 31 and 31 so as to be separated from each other. Since the second ring elements 41 and 41 are provided at both ends of the two-binding member 4 and the engaged parts 411 and 411 are provided opposite to each other at the distal ends of the second ring elements 41 and 41, the first ring The engagement between the engaging portions 311 and 311 and the engaged portions 411 and 411 is released by pressing the elements 31 and 31 toward each other. That is, by configuring the binding tool T in this way, the operation of changing the first binding member 3 and the second binding member 4 to the open state is drawn in the direction in which the first ring elements 31 and 31 are brought together. This can be done by a simple operation of picking.

  The present invention is not limited to the embodiment described above.

  For example, as shown in a plan view in FIG. 9A and a bottom view in FIG. 9B, two pairs of first and second binding members 3 and 4 in the above-described embodiment are provided in a four-hole file. A binding tool T2 having a corresponding mode is conceivable.

  Further, as shown in a bottom view in FIG. 10, an elastic biasing means 9 that biases the first and second binding members 3 and 4 toward the closed state is formed in a part of the cover portion 2. A binding tool T3 is also conceivable.

  Further, as shown in the central cross-sectional view of FIG. 11, a leaf spring as an elastic urging means that forms a plate-like plate shape in a front view projecting to the side away from the cover body on a part of the longitudinal dimension of the cover portion 2. 20, the elastic force receiving portions 33, 43 in the above-described embodiment are brought into contact with the leaf spring 20, and the elastic force of the leaf spring 20 toward the elastic force receiving portions 33, 43 toward the side away from the cover body. A binding tool T4 having a state in which the urging force is applied and biased toward the open state is also conceivable. Even if it is such, if all of a ring element, a rotating shaft part, and an elastic-force receiving part were integrally formed by one linear member in the binding member, the structure of patent document 1 will be described. The effect which can omit the connection part in and the effect which can abbreviate | omit the operation | work which attaches a ring element to the said connection part are acquired.

  And the storage part in embodiment mentioned above does not necessarily need to be provided, when there is sufficient space between an elastic biasing means and the upper wall of a cover part.

  In addition, various modifications may be made without departing from the spirit of the present invention.

The perspective view which shows the file which concerns on one Embodiment of this invention. The perspective view which shows the obstruction | occlusion state of the binding tool which concerns on the same embodiment. The bottom perspective view which shows the obstruction | occlusion state of the binding tool which concerns on the same embodiment. The top view which shows the obstruction | occlusion state and open | release state of the binding tool which concern on the embodiment. The bottom view which shows the obstruction | occlusion state and open | release state of the binding tool which concern on the embodiment. The center cross-sectional view in FIG. The perspective view which shows the open state of the binding tool which concerns on the same embodiment. The bottom perspective view which shows the open state of the binding tool which concerns on the same embodiment. The top view and bottom view which show the binding tool which concerns on other embodiment of this invention. The bottom view which shows the obstruction | occlusion state and open | release state of the binding tool which concern on the embodiment. The center cross-sectional view which shows the binding tool which concerns on other embodiment of this invention. The center cross-sectional view which shows the conventional binding tool.

Explanation of symbols

F ... File 1 ... Cover body T, T2, T3, T4 ... Binding tool 2 ... Cover part 2c ... Projection piece (elastic biasing means)
2h ... storage part 20 ... leaf spring (elastic biasing means)
DESCRIPTION OF SYMBOLS 3 ... 1st binding member 31 ... 1st ring element 311 ... Engagement part 32 ... Rotating shaft part 33 ... Elastic force receiving part 4 ... 2nd binding member 41 ... 2nd ring element 411 ... Engagement part 42 ... times Moving shaft portion 43 ... elastic force receiving portion 9 ... elastic biasing means

Claims (14)

A cover portion that is attached to the cover sheet and a binding member that is provided in a pair and is rotatably supported by the cover portion. Each having a ring element that forms a closed state or an open state,
While providing a part of the cover part with elastic urging means for urging the binding member toward either the closed state or the open state,
Each of the binding members receives the action from the elastic urging means by abutting against the ring element, a rotating shaft part rotatably supported by the cover part, and the elastic urging means. A binding tool, wherein the force receiving portion is formed integrally with a single linear member. The binding tool according to claim 1, wherein the elastic biasing means is provided by using a part of the cover portion. The binding tool according to claim 2, wherein the elastic biasing means of the cover part is formed by bending. The rotation shaft portion of the binding member is supported at both side edges of the cover portion, and the elastic force receiving portion is located closer to the center in the width direction of the cover portion than the rotation shaft portion. The binding tool according to claim 1, 2, or 3, wherein the binding tool receives an elastic force in a direction rotating around a central axis of the rotation shaft portion from the elastic biasing means. A storage portion capable of storing the elastic force receiving portion in the opened state is provided at a position facing the elastic force receiving portion of the cover portion so as to protrude in a direction away from the cover sheet. Item 5. A binding tool according to item 4. The elastic urging means urges the binding member toward the open state, and an engagement portion is provided at the tip of a ring element provided on one binding member and provided on the other binding member. When an engaged portion that can be engaged with the engaging portion is provided at the tip of the ring element, and the engaging portion and the engaged portion are engaged to form a closed state together with the cover portion. The binding tool according to claim 1, 2, 3, 4, or 5, wherein the engaging portion and the engaged portion are in close contact with each other by the action of the elastic biasing means. A ring element is provided at one end of one of the paired binding members, and an engaging portion is provided at the tip of each ring element so as to be separated from each other. The other end of the other binding member The binding tool according to claim 6, wherein a ring element is provided in each of the ring elements, and engaged portions are provided at the front end portions of the respective ring elements so as to face each other. A binding comprising a cover body and a binding tool attached to the cover body, the binding tool being provided in a pair with a cover part attached to the cover body and rotatably supported by the cover part A pair of binding members each having a ring element that forms a closed state or an open state together with the cover portion by being engaged and disengaged with each other,
While providing a part of the cover part with elastic urging means for urging the binding member toward either the closed state or the open state,
Each of the binding members receives the action from the elastic urging means by abutting against the ring element, a rotating shaft part rotatably supported by the cover part, and the elastic urging means. A file, wherein the force receiving portion is formed integrally with a single linear member. 9. The file according to claim 8, wherein the elastic urging means is provided by using a part of the cover part. The file according to claim 9, wherein the elastic biasing means of the cover part is formed by bending. The rotation shaft portion of the binding member is supported at both side edges of the cover portion, and the elastic force receiving portion is located closer to the center in the width direction of the cover portion than the rotation shaft portion. 11. The file according to claim 8, 9 or 10, wherein the file receives an elastic force in a direction rotating around a central axis of the rotation shaft portion from the elastic biasing means. A storage portion capable of storing the elastic force receiving portion in the opened state is provided at a position facing the elastic force receiving portion of the cover portion so as to protrude in a direction away from the cover sheet. Item 11. The file according to Item 11. The elastic urging means urges the binding member toward the open state, and an engagement portion is provided at the tip of a ring element provided on one binding member and provided on the other binding member. When an engaged portion that can be engaged with the engaging portion is provided at the tip of the ring element, and the engaging portion and the engaged portion are engaged to form a closed state together with the cover portion. The file according to claim 8, 9, 10, 11 or 12, wherein the engaging portion and the engaged portion are in close contact with each other by the action of the elastic biasing means. A ring element is provided at one end of one of the paired binding members, and an engaging portion is provided at the tip of each ring element so as to be separated from each other. The other end of the other binding member 14. The file according to claim 13, wherein a ring element is provided in each of the ring elements, and the engaged parts are provided opposite to each other at the tip of each ring element.

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