JP4880049B2 - Binding tools such as documents - Google Patents

Description

  The present invention relates to a binding tool technology for opening and closing a ring configured to be opened and closed by a ring member with a switching lever in order to bind a document or the like.

  A binding tool including a plurality of ring members is fixed to the inner surface of a cover body such as a binder. As this binding tool, a lever arch type binding tool that opens a ring by lever operation has been widely known.

  As this lever arch type binding tool, it describes in patent document 1, for example. The binding tool described in the document includes a band plate-shaped base portion made of a metal plate, two rings formed of a plurality of ring members provided on the base portion, and a closed ring posture and an open ring. And an opening / closing mechanism with an operating lever for changing the posture. Of the ring members constituting the two rings, the ring member on one side is configured to be rotatable with respect to the base portion, and the ring can be opened and closed by an operation of depressing the operation lever.

  As described in Patent Document 1, when the ring member on one side is configured to be rotatable with respect to the base portion, the opening degree of the ring is small, and the open portion is limited to one side, and the operation lever Projecting in the vicinity of the ring in the open state, the workability when binding and taking out documents and the like is poor.

  In addition, this lever arch type binding tool has a large opening / closing mechanism, and is located in the center portion between the two rings, and the lever extending therefrom protrudes in the vicinity of the ring in the open state, so that a document or the like is bound or taken out. Not only does it get in the way, but you can't put in and out many documents at once.

  Therefore, as described in Patent Document 2, when the two rings provided on the base portion are in the open ring posture, the present applicant is a lever-operating type configured such that the switching lever can pass through the open portion of each ring. We have already proposed binding tools such as documents. In this binding tool, even when the ring is in the open ring posture, the free end of the switching lever can be passed to the outside of the ring to be in a retracted state. Therefore, the workability at the time of replacement of documents can be improved by preventing the switching lever from coming in the way even when the documents are inserted and removed.

Japanese Utility Model Publication No.57-24077 International Publication No. 2005/100044

In the binding tool of Patent Document 2, a bearing portion of a cam member at a base end portion of a switching lever is provided in a cover portion that rises from a base portion. In this bearing portion, a pair of upright pieces facing each other at an interval is raised upward from the center of the cover portion, and a shaft pin serving as a rotation center of the cam member is provided between the upright pieces. For this reason, since a slightly larger occupied space is required in the central portion of the cover portion, there is a restriction in reducing the ring diameter accordingly. For example, when the ring diameter is about 32 mm or more, the function as a binding tool can be fully exerted. However, when the ring diameter is less than 32 mm, the projecting part including both standing pieces and the like may become an obstacle depending on the documents to be inserted and removed. was there.

  In addition, since both standing pieces are raised vertically by further bending the center part of the cover part that is curved after being raised from both sides of the base part, two curved parts are formed before reaching the standing piece. There is a problem that it is difficult to increase the processing accuracy. When the machining accuracy is lowered, the position of the cam member is not stable, so that the cam member cannot be operated with high accuracy, and the function of the switching mechanism including the cam member is lowered accordingly.

Accordingly, an object of the present invention is to provide a binding tool such as a document that can be to suppress the height of the protrusions from the base over the scan area surface widening the space on the base surface.

In order to solve the above-mentioned problems, the present invention employs the following means.
The binding tool for documents and the like according to the present invention includes a ring that can be opened and closed for binding documents and the like,
A ring support member for supporting the ring;
A cam member that abuts against the ring support member and defines the position of the ring support member, and the ring supported by the ring support member by changing the position of the ring support member as it rotates. A cam member that opens and closes;
A base portion formed of a metal plate, wherein a cam shaft bearing portion of the cam member is formed, and the bearing portion is formed by an inner surface of a curved portion in which a part of the base portion is curved toward the surface side. The base part,
A lever connected to the cam member for rotating the cam member;
The ring support member has a contact portion that contacts the cam member at a position facing the cam member, and a recessed portion that is recessed in the vicinity of the contact portion as compared to the contact portion, and the surface of the base portion is On the back side of the base body to be formed, the base body is arranged so as to be able to incline to the side perpendicular to the length direction of the base body, and the base end of the ring is fixed and supported.
When the lever is operated with a force exceeding a predetermined level, the cam member can get over the contact portion.

According to the binding tool of the documents, etc. of the present invention, as possible out to expand the space on the base portion surface by suppressing the height of the protrusions from the base over the scan surface.

It is a whole perspective view of the binding tool which concerns on embodiment of this invention. It is a side view of the binding tool which concerns on embodiment of this invention. It is a top view of the binding tool which concerns on embodiment of this invention. It is a front view of the binding tool which concerns on embodiment of this invention. It is a side view of the binding tool which concerns on embodiment of this invention. It is a top view of the binding tool which concerns on embodiment of this invention. It is a front view of the binding tool which concerns on embodiment of this invention. It is a top view of the base part of the binding tool which concerns on embodiment of this invention. It is sectional drawing of the base part of the binding tool which concerns on embodiment of this invention. It is a side view of the base part of the binding tool which concerns on embodiment of this invention. It is AA expanded sectional drawing of FIG. It is BB expanded sectional drawing of FIG. It is CC expanded sectional drawing of FIG. It is an expanded sectional view of the principal part of the binding tool which concerns on embodiment of this invention. It is an expanded sectional view of the principal part of the binding tool which concerns on embodiment of this invention. It is operation | movement explanatory drawing of the principal part of the binding tool which concerns on embodiment of this invention. It is operation | movement explanatory drawing of the principal part of the binding tool which concerns on embodiment of this invention. The cam member of the binding tool which concerns on embodiment of this invention is shown, (a) is a top view, (b) is a plane sectional view, (c) is a bottom view. It is a figure which shows the cam member of the binding tool which concerns on embodiment of this invention, (a) is a plane sectional view, (b) is a side view, (c) is a sectional side view. It is a figure which shows the supporting member of the binding tool which concerns on embodiment of this invention, (a) is a top view, (b) is a side view. It is a figure which shows the supporting member of the binding tool which concerns on embodiment of this invention, (a) is a top view, (b) is a side view. It is a figure which shows the spring member of the binding tool which concerns on embodiment of this invention, (a) is a top view, (b) is a side view.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a binding tool such as a document according to an embodiment of the present invention. 2 is a side view of the binding ring that is closed, FIG. 3 is a plan view thereof, FIG. 4 is a front view thereof, FIG. 5 is a side view of the binding tool ring being opened, and FIG. The plan view and FIG. 7 are front views thereof. 8-13 is a figure which shows the structure of a base member, and FIG.14 and FIG.15 is an expanded sectional view of the principal part.

  The binding tool 1 of this embodiment includes a base portion (base plate) 2 formed of a metal plate, two rings 3 and 3 provided on the base portion 2 with a distance in the longitudinal direction (length direction), and And a switching mechanism 5 including a switching lever 4. The two rings 3 include a closed ring posture for binding documents as shown in FIGS. 2 to 4, and a part of the closed ring for binding documents as shown in FIGS. 1 and 5 to 7. It can change to the open ring posture that opens.

  The switching lever 4 has a base end portion 41 and a free end 42, and the base end portion 41 is provided with a cam member 6 that adjusts the degree of opening and closing of the rings 3 and 3 according to the rotation position of the free end. ing. The cam member 6 has a cam body 61, a cam shaft 62 protruding from the cam body 61, and a cam surface 63 (see FIGS. 14 to 19). The cam shaft 62 is supported by a bearing portion 25 described later.

  The switching mechanism 5 is provided in the base portion 2 and is for switching the rings 3 and 3 between the closed ring posture and the open ring posture. The switching mechanism 5 includes a switching lever 4 that is swingably (rotatably) attached to the base portion 2. When the rings 3 and 3 are in the open ring posture, the switching lever 4 is designed to pass through the open portion K of the rings 3 and 3 as shown in FIGS.

Next, the details will be described with reference to the drawings.
In this embodiment, the base portion 2 is formed by processing (bending or drawing) a single metal plate as shown in FIGS. That is, the base portion 2 includes a base body 21 that is curved upward as a whole so as to form a surface (top plate) of the base portion 2 and a side surface (side plate) of the base portion 2. The side piece portions 22 and 22 on both sides curved in a form inclined toward the back side are formed by processing a metal plate. The side piece portions 22 and 22 are bent when the binding tool 1 is assembled.

  The base main body 21 is formed in a long strip shape when viewed from the upper surface, and fixing holes 24 for fixing to the inner surface of a binder cover body with screws, rivets or the like are provided near both ends thereof. On the surface of the base body 21, a groove-like recess 23 that is curved downward in a semicircular cross section is formed. The recess 23 is located in the center of the base body 21 in the width direction (hand-end direction) and extends in the longitudinal direction of the base body 21. The groove width of the recess 23 is formed wider than the lateral width of the lever 4. Thereby, it is considered that a part of the switching lever 4 enters the recess 23 and that the ring 3 and 3 can be reliably opened and closed.

  And the bearing parts 25 and 25 of the cam shafts 62 and 62 are formed in the center part of this base main body 21. As shown in FIG. The bearing portions 25 and 25 are formed by inner surfaces 25a and 25a of curved portions in which a part of the base body 21 is curved so as to swell toward the surface side. The bearing portions 25, 25 have a semicircular cross section, and the open portion of the semicircle faces the back side (downward) of the base body 21. An opening 26 for arranging the cam member 6 is formed between the bearing portions 25, 25 of the base body 21. Therefore, the cam member 6 is set from the back side of the base body 21.

  The surfaces of the bearing portions 25, 25 of the base body 21 are formed on inclined surfaces 27, 27 that are inclined downward toward the side piece portions of the base portion 2, respectively. The inclined surfaces 27 and 27 are provided for smoothly guiding the edge portions of documents to be bound or the like so that they are not caught by contact with the raised bearing portions 25 and 25.

  The bearing portions 25, 25 are arranged at the center between the two rings 3, 3 and constitute a part of the hinge of the switching lever 4. That is, on the base body 21, bearing portions 25, 25 curved upward in a semicircular cross section are arranged in a form facing each other in the width direction of the base body 21, and the inner surfaces of the bearing portions 25, 25 are arranged. The camshafts 62 and 62 are inserted. Thereby, the bearing parts 25 and 25 are formed so that the height of the switching mechanism 5 may be suppressed.

  The base portion 2 has slot-shaped notches 28 and 28 for projecting ring members 31 and 32 to be described later onto the base body 21 from near both sides in the width direction of the base body 21 to the side piece portions 22 and 22. Each is provided.

  The side piece portions 22 and 22 on both sides in the width direction of the base main body 21 are formed with bent portions 29 and 29 for supporting support members 51 and 52, which will be described later, so that they can swing (tilt) on their inner surfaces. Each bent portion 29 extends in the length direction of the base body 21.

  The reason why the base body 21, the side piece portion 22 and the bearing portion 25 are formed by processing a single metal plate is that the number of parts can be reduced, the overall configuration can be simplified, and the processing accuracy can be increased. is there. Furthermore, the base body 21 itself has a shape that also serves as a cover, so that the appearance and safety can be improved.

  Each ring 3 has a first ring member 31 and a second ring member 32 that are in a closed ring posture when the tips 30 are in contact with each other and are in an open ring posture when the tips 30 are separated from each other. The switching mechanism 5 is configured to be operable in a direction in which the tips 30 of the ring members 31 and 32 approach and separate from each other. Thus, the opening degree of the ring 3 (the distance between the open portions K), which is the maximum separation distance between the tips 30, is increased so as to improve workability when inserting and removing documents and the like.

The ring members 31 and 32 are formed substantially symmetrically as viewed from the front. Therefore, the open portion K (see FIGS. 1 and 7) of the ring formed when the tips 30 of the ring members 31 and 32 are separated from each other is on the base portion 2 and on the base portion (base body) 2. Located in the center in the width direction. Accordingly, the opening / closing timing of the rings 3 and 3 with respect to the rotation position of the switching lever 4 is easily set. That is, the relationship between the rotation angle of the switching lever 4 and the opening / closing angle of the rings 3 and 3 is easily designed.

  The cam member 6 provided at the base end portion of the switching lever 4 is provided with a cam surface 63 for adjusting the degree of opening and closing of each ring 3 according to the rotational position of the free end 42. In this way, by making it possible to adjust the opening / closing degree of each ring 3 only by operating the switching lever 4, the relationship between the operating angle of the switching lever 4 and the opening / closing angle of the ring 3 can be freely set. . Therefore, not only the right and left symmetrical ring members 31 and 32 but also various ring shapes can be supported.

  The switching lever 4 itself is formed of a bent metal rod, and the cam member 6 is fixed to the base end portion 41, and the cam surface 63 is formed on the cam main body 61 of the cam member 6. The cam member 6 is provided with an attachment hole 65 for inserting and attaching the proximal end portion of the switching lever 4. The cam member 6 is made of a synthetic resin such as polyacetal resin.

  As shown in FIGS. 18 and 19, the cam member 6 is formed integrally with a cam body 61 and cam shafts 62 and 62. The cam shafts 62, 62 protrude coaxially from the side surfaces on both sides of the cam body 61. The curvature of the outer peripheral surface of the cam shaft 62 is set to be smaller than the curvature of the inner surface 25a of the bearing portion 25 to the fitting tolerance.

  On both side surfaces of the cam body 61, a contact portion A is provided in parallel with the outer periphery of the cam shaft 62 so as to contact the surface of the bearing portion 25 and restrict downward displacement of the cam shaft 62. That is, arc-shaped grooves 64 and 64 for forming the contact portion A are formed between the cam body 61 and the cam shaft 62. The arc-shaped grooves 64 and 64 are curved and formed in an arc shape (semicircular shape) so that the ends of the left and right bearing portions 25 and 25 facing each other around the opening 26 of the base body 21 can enter. Yes. The groove widths of the arc-shaped grooves 64 and 64 are formed to be slightly larger than the thickness of the metal plate forming the bearing portions 25 and 25, and consideration is given to avoiding backlash more than necessary.

  As shown in FIGS. 18 and 19, of the groove walls on both sides of the arc-shaped groove 64, one groove wall 64 a is formed by a part of the outer peripheral surface of the cam shaft, and the other groove wall 64 b is the cam shaft 62. It is formed by a part of the flange-like rib 66 extending in a semicircular shape along the circumferential direction. In other words, the arc-shaped groove 64 is formed by a flange-like rib 66 provided at a distance from the cam shaft 62 by the width of the groove.

  The arc-shaped groove 64 keeps the cam shaft 62 in a fixed position so that the cam shaft 62 is not displaced (lowered) downward from the bearing portion 25. That is, as shown in FIG. 16, the arc-shaped groove 64 is formed on the other groove wall on the upper surface of the bearing portion 25 when the rotational position of the cam member 6 is at a position to change the ring 3 to the open ring posture. The cam shaft 62, that is, the cam member 6 is prevented from being displaced downward by contacting with the cam 64a. Therefore, the other groove wall 64a constitutes the contact portion A.

  As shown in FIGS. 15 and 17, the cam surface 63 includes a first cam surface 63a that keeps the ring 3 in a closed ring posture, a second cam surface 63b that moves the ring 3 from a closed ring posture to an open ring posture, As shown in FIGS. 14 and 16, it has a third cam surface 63c that keeps the ring 3 in an open ring posture.

The switching mechanism 5 includes two support members (boost plates) 51 and 52 that are arranged side by side on the back surface side of the base body 21 and can be inclined to the side perpendicular to the length direction of the base body 21. . The base end of the first ring member 31 is fixed and supported by one support member 51, and the base end of the second ring member 32 is fixed and supported by the other support member 52. The support members 51 and 52 are each formed to extend in the length direction of the base body 21. Therefore, the first ring members 31 and 31 and the second ring members 32 and 32 are fixed near both ends in the length direction of the support members 51 and 52, respectively.

  Each of the support members 51 and 52 is formed of a metal plate in a strip shape and has one side portion and the other side portion. One side portion of each of the support members 51 and 52 is supported by the inner surface of the bent portion 29 of the side piece portion 22 of the base portion 2, and the other side portions are partially overlapped with each other.

  Each of the support members 51 and 52 is also formed by processing a single metal plate, and as shown in FIGS. 20 and 21, is formed substantially symmetrical in a plan view. However, the shapes of both are slightly different in that there is a wrap portion described later.

  That is, when the binding tool 1 is viewed from the front, the left side portion of the support member 51 and the right side portion of the support member 52 are abutted against bent portions 29 and 29 formed on the side piece portions 22 on both sides, respectively. It is supported. Thereby, both the supporting members 51 and 52 are supported by the corresponding side piece portions 22 and 22 in a temporarily engaged state so as to be swingable.

  Further, the left support member 51 and the right support member 52 have lap portions that overlap each other. In the embodiment, two protruding pieces 52b and two protruding piece receiving portions 52c are formed on the other side portion of the right support member 52 with an interval therebetween. On the other side of the left support member 51, there are two protruding piece receiving portions 51c and two protruding pieces 51b at positions facing the protruding pieces 52b and the protruding piece receivers 52c of the supporting member 52, respectively. Are formed at intervals.

  And the protrusion piece receptacle 52c of the support member 52 which opposes them under the two protrusion pieces 51b of the support member 51, respectively. Furthermore, the protruding pieces 52b of the supporting member 52 facing each other are overlaid on the two protruding piece receiving portions 51c of the supporting member 51, respectively.

  Contact portions 51d and 52d for making contact with the cam surface 63 of the cam member 6 are respectively formed at the center portions of the other side piece portions of the support members 51 and 52 (see FIGS. 14 to 21). Concave surfaces 51e and 52e are formed on the front and rear sides of the contact portions 51d and 52d (front and rear in the longitudinal direction of the support member) for providing a step difference relative to the contact portions 51d and 52d.

  Among the cam surfaces 63, when the ring 3 is in the closed ring posture, the first cam surface 63a contacts the contact portions 51d and 52d as shown in FIGS. 15 and 17, and the other side of the support members 51 and 52 is provided. When one part is pushed down and the ring 3 is in the open ring posture, the contact parts 51d and 52d come into contact with the third cam surface 63c as shown in FIGS. 14 and 16, and the other side piece of the support members 51 and 52 is placed. Push up the part. The force for pushing up the other side piece is performed by a spring member.

  That is, a spring member 55 that biases the support member 52 in a direction in which the tips 30 of the ring members 31 and 32 are separated from each other is set between both the support members 51 and 52 and the side piece portion 22 of the base body 21. ing. However, in this embodiment, the spring member 55 is configured to act only on the one support member 51 so that the configuration can be simplified accordingly. This is because even with such a configuration, the ring 3 can be changed between the closed ring position and the open ring position by operating the two support members 51 and 52 simultaneously by operating the switching lever 4.

As shown in FIG. 22, the spring member 55 has an approximately M shape in plan view, is formed by bending a wire, and has four fulcrum portions 56 and one urging portion 57. The four fulcrum portions 56 are set so as to abut against the inner surfaces of the side piece portions 22 on both sides of the base portion 2. In that state, the urging portion 57 is so arranged that one urging portion 57 contacts the back surface of the support member 51 and urges the other side piece portion of the support member 51 upward (the back surface side of the base body 21). A rising angle θ and a length L of 57 are set.

When this assembling is binding tool 1, first, it shows Suyo in phantom in FIGS. 11 to 13, leaving the side piece portions 22 of the base portion 2 in a semi-bent state. In this state, the cam member 6 with the switching lever 4 is inserted and set from the back side of the base body 21.

  Next, the lap portions of the inner side pieces of the left and right support members 51 and 52 are overlapped and set on the back side of the base body 21. At this time, the ring members 31 and 32 attached to the left and right support members 51 and 52 are guided to the upper side of the base body 21 using the notches 28. And in this state, as shown by the continuous line of FIGS. 11-15, the side piece parts 22 and 22 of the base part 2 are bent inside. After that, the spring member 55 is set between the side piece portions 22 and 22. Thereby, the binding tool 1 shown in FIG. 1 can be assembled.

  In the above embodiment, the two ring members 31 and 32 constituting the ring 3 are formed symmetrically. However, if the switching lever 4 can pass through the open portion K of the ring, the ring members 31 and 32 are provided. It is not always necessary to form symmetrically. For example, the present invention can be applied to a ring having a D shape when viewed from the front.

  In the embodiment, an example in which the opening portion K of the ring is applied to a binding tool through which the switching lever 4 can pass is shown. However, when the technical idea of the present invention is considered, the switching lever 4 does not pass through the opening portion K. It can also be applied to possible binding tools.

DESCRIPTION OF SYMBOLS 1 Binding tool 2 Base part 21 Base main body 22 Side part 25 Bearing part 25a Inner surface 26 Opening 27 Slope 29 Bending part 3 Ring 31 First ring member 32 Second ring member 4 Switching lever 6 Cam member 61 Cam main body 62 Cam shaft 63 Cam surface 64 Arc-shaped groove 64b The other groove wall (contact portion)
5 Switching mechanism 51, 52 Support member 55 Spring member A Contact part K Open part

Claims (1)

A ring that can be opened and closed to bind documents,
A ring support member for supporting the ring;
A cam member that abuts against the ring support member and defines the position of the ring support member, and the ring supported by the ring support member by changing the position of the ring support member as it rotates. A cam member that opens and closes;
A base portion formed of a metal plate, wherein a cam shaft bearing portion of the cam member is formed, and the bearing portion is formed by an inner surface of a curved portion in which a part of the base portion is curved toward the surface side. The base part,
A lever connected to the cam member for rotating the cam member;
The ring support member has a contact portion that contacts the cam member at a position facing the cam member, and a recessed portion that is recessed in the vicinity of the contact portion as compared to the contact portion, and the surface of the base portion is On the back side of the base body to be formed, the base body is arranged so as to be able to incline to the side perpendicular to the length direction of the base body, and the base end of the ring is fixed and supported.
The contact portion is capable of getting over the cam member when the lever is operated with a predetermined force or more.
Binding tool.