JPH0241293A - Ring metal fitting - Google Patents

Abstract

PURPOSE:To prevent the unnecessary opening of binding levers due to the impact force from the outside by holding the closed state of a pair of binding levers by the engagement of the engaging pieces provided to a pair of operation plates with the engaging hole provided to a lever piece. CONSTITUTION:When a pair of binding levers 5, 5 are pressed in a closing direction by a finger, the inner edge connection parts of a pair of operation plates 4 are bent in a trough shape to close the binding levers 5, 5 and the leading end of an operation part 11 is downwardly pressed by the inner edge connection parts of the operation plates 4, 4 and a lever piece 9 is revolved around the support part 12 with a sheath plate 1 to be erected. In this state, a pair of engaging pieces 8, 8' approach each other to be opposed to an engaging hole 14. When the lever piece 9 is further strongly pressed inwardly, the left and right side edges of the engaging hole 14 presses the engaging pieces 8, 8' inwardly while slide with the expanded parts (a) of the engaging pieces 8', 8' and acting pieces 8, 8 are twisted inwardly to tighten a pair of the operation plates 4, 4. When the lever piece 9 is sufficiently erected, the left and right side edges of the engaging hole 14 exceed the expanded parts (a) to be engaged with the rear end parts thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present application relates to a ring fitting for removably binding a perforated sheet by opening and closing a binding rod.

BACKGROUND ART Conventionally, left and right receiving ribs of a sheath plate were provided with receiving ribs bent inwardly on the left and right side edges along the longitudinal direction of a long piece of tent whose cross section in the width direction was formed into a curved cane. The outer edges of the actuating plates, which are made up of a pair of long elastic plates whose inner edges are joined together so as to be bendable, are engaged with each other. The binding rods are protruded above the sheath plate through notch holes provided on the left and right side edges of the sheath plate, and when the pair of actuating plates are bent in a valley-fold shape, the ends of the pair of left and right binding rods are closed; The pair of left and right binding rods is configured to open when bent into a mountain-fold shape, and lever pieces each having an upward U-shaped lower end are tiltably supported at both ends of the sheath plate. Also, a ring metal fitting is known in which the bent tip portion thereof is engaged with the end portions of the pair of actuating plates.

The problem to be solved by the invention is that, according to the conventional ring fittings described above, when a strong impact is applied from the outside, such as by accidentally dropping the file to which the ring fittings are attached, in rare cases, the pair of ring fittings may be damaged. I was used to the binding rod opening unnecessarily, causing documents, etc., that were bound to the ring fitting to become loose.

The purpose of this application is to eliminate such deficiencies.

Means for Solving the Problems In order to achieve the above-mentioned object, the present application has a sheath plate having receiving ribs bent inwardly and downwardly on both sides along the longitudinal direction. The outer edges of a pair of elongated actuating plates which are bently joined in a valley-fold shape and a mountain-fold shape are engaged with each other, and a pair of arc-shaped binding rods are respectively implanted in the pair of actuating plates. protrudes above the sheath plate through notch holes provided on both side edges of the sheath plate, and enables the tips of the pair of binding rods to be opened and closed by the valley-fold and mountain-fold bending actions of the pair of operating plates; , a lever piece having an operating portion bent in a mountain-fold shape by pressing the inner edge joint of the actuating plate is supported on both ends of the sheath plate so as to be freely tiltable, and At least one end of the direction is provided with an operating piece that stands vertically and has a locking piece that bends outward at its tip, and a pair of actuating plates are provided on the lever piece in a valley-fold shape. The device is characterized by having a locking hole that locks with the pair of locking pieces in the bent state, and preferably a locking hole is provided on the outer edge of the tip of the locking piece on the side of the locking hole. Form an overhanging portion that comes into sliding contact with the edge, or form an overhanging portion that comes into sliding contact with the upper edge of the locking hole on the top surface of the tip of the locking piece, and furthermore, form a notched recess into which the action piece is inserted, at the center of the end of the sheath plate. The finger rest of the lever member is formed in an outward U-shape in cross section.

Function: As in the conventional case, the lever piece is pushed outward from the state in which the lever piece is erected and the pair of actuating plates are bent in a valley-fold shape and the pair of binding rods are closed. Then, the lever piece tilts using the supporting part with the sheath plate as a fulcrum, and at the time of this tilting, the locking piece and the locking hole are unlocked, and then the inner edge joint of the pair of actuating plates is moved by the operating part. It is pushed up and bent into a mountain-fold shape, and the pair of binding rods are opened. Therefore, documents etc. are bound into the binding rod in this state.

In addition, when the binding rods are open and the pair of binding rods is pressed directly with a finger in the direction of closing, as in the conventional case, the inner edge joints of the pair of operating plates are bent in a valley-fold shape, and the pair of binding rods are closed. At the same time, the operating part is pushed down by the inner edge joint of the actuating plate, and the lever piece tilts in the upright direction using the supporting part with the sheath plate as a fulcrum, and in this state, the pair of locking pieces approach each other, and It faces the locking hole provided in the lever piece. When the lever piece is pressed further inward in this state, the side edge of the locking hole slides against the outer edge of the locking piece, the action piece is expanded inward, and the pair of actuation plates are tightened. With the lever piece fully erected, the engagement between the engagement hole and the engagement piece is maintained, and the valley-folded state of the pair of actuating plates is also maintained.

In the above, an overhanging portion that slides into contact with the side edge of the locking hole is formed on the outer edge of the tip of the locking piece, or an overhang portion that slides into contact with the upper edge of the locking hole is formed on the top surface of the tip of the locking piece. When formed, the side edge or upper edge of the locking hole comes into sliding contact with the overhang, and the lever piece is locked to the rear end of the overhang at a sufficiently erect position.

Example Embodiments of the present application will be described in detail below based on the drawings.

(1) is a long temporary curved in the width direction, with receiving ribs (2) bent inward and downward on the left and right side edges along the longitudinal direction.
2), and cutout recesses (3) and (3) are formed at the center of both ends of the sheath plate.

(4), (4) are located on the lower surface of the sheath plate (1), and have outer edges engaged with the receiving ribs (2), (2), respectively, and inner edges of which are joined so as to be flexible. A pair of actuating plates (4) consisting of long elastic plates.

In (4), a pair of binding rods (5) exhibiting an arc shape along the longitudinal direction, the lower ends of (5) are respectively planted in an upright manner, and this pair of binding rods (5), (5) is
The pair of actuating plates (4) protrude upwardly from the sheath plate (1) through notch holes (6), (6) provided laterally in the left and right edges in the longitudinal direction of the sheath plate (1), respectively. ), (4
) are bent in a valley-fold shape, the tips join together, and when the pair of actuating plates (4), (4) are bent in a mountain-fold shape, they are opened. The actuating plates (4) have a notch (7) at the end position of the inner edge joint part, and rise vertically from this position, and have a locking piece (8) facing outward at the tip. The working pieces (8) and (8) with the same function are integrally provided.

A tapered protruding portion a is formed on the outer edge of the locking piece (8)°, and the actuating pieces (8), (8) thus formed are connected to the actuating plate (4). , (
4) is led out upward from the notch recesses (3) at both ends of the sheath plate (1) when assembled to the sheath plate (1). (
9) has a finger rest (1
0) are lever pieces each having an operating part (11) integrally formed in the lower part thereof, which is bent upward in a U-shape and protrudes forward;
As in the past, finger rests (lO) are vertically tiltably supported (12) at both ends of the sheath plate (1) so as to protrude above the sheath plate (1), and the finger rests (12) are vertically tiltable. Part (11
) is the actuating plate (4).

(4) Opposing the lower surfaces of both ends of the inner edge joint portion. Further, the action piece (8) is provided at the center of the lever piece (9).

A locking hole (14) that locks in pressure contact with the locking pieces (8)' and (8)' provided in (8) is opened. Reference numeral (15) designates a mounting pipe that extends from the laminated plate (1) to the inner edge joints of the pair of operating plates (4) and (4) in order to attach the metal fittings of the present invention to the cover.

When in use, however, the lever part (9) stands up, and the pair of actuating plates (4), (4) fold in a valley-like manner, as shown in the solid line in Figure 2-3, as in the conventional case. From the bent state where the pair of binding rods (5), (5) are closed, the finger rest (10) is pressed outward.

Then, the lever piece (9) is attached to the support part (12) with the sheath plate (1).
) as a fulcrum, and during this tilting, the locking piece (8)
, (8)' and the locking hole (14) are released, and then the inner edge joints of the pair of actuating plates (4), (4) are pushed up by the tip of the operating part (11), and the pair The actuating plates (4), (4) are bent in a mountain-fold shape, and the pair of binding rods (5), (5) are opened, as shown by the phantom lines in FIG. ) is the virtual line (a) in Figure 3.
Lodging down as shown.

Therefore, in this state, documents etc. are bound (5), (5)
It is written in.

Also, as shown by the imaginary lines in Figure 2, a pair of binding rods (5),
From the state where (5) is open, the binding rods (5), (5)
) with your finger in the direction that they close.

Then, the inner edge joints of the pair of actuating plates (4) are bent in a valley-fold shape, and the pair of binding rods (5) are bent as shown by the solid line in FIG.
, (5) are closed, the tip of the operating part (11) is pressed downward by the inner edge joint of the actuating plates (4), (4), and the lever piece (9) is brought into contact with the sheath plate (1). The support part (12) is used as a fulcrum to rotate and stand up as shown in the imaginary line (b) in FIG. In the state shown by the imaginary line (b) in FIG. 3, the pair of locking holes (8)', (8)'' are close to each other and are opposed to the locking hole (14). In this state, when the lever piece (9) is further strongly pressed inward, the left and right side edges of the locking hole (14) are pushed into the locking hole (8)',
While slidingly contacting the overhanging part a of (8)', the locking piece (8)'
, (8)' inward, and actuating pieces (8) , (8
) is twisted inward, and a pair of actuating plates (4), (4
) is tightened. When the lever piece (9) is fully erected as shown by the solid line in FIG. 3, the left and right side edges of the locking hole (14) cross over the overhanging part a and lock with the rear end.

Therefore, even if an external impact force acts on the pair of actuating plates (4), (4) in this state and the pair of actuating plates (4) tries to bend into a mountain-fold shape, the locking pieces (8)', (8)' and locking hole (15)
The above embodiment shows a case in which a tapered projecting portion a is provided on the outer edge of the locking pieces (8)' and (8)'. However, as shown in FIG. 5, tapered projecting portions a may be provided on the upper surfaces of the locking pieces (8)', (8)'.

Furthermore, in the above, it is preferable that the pair of acting parts (8), (8) be provided at both ends of the pair of actuating plates (4), (4), but they may be provided only at one end thereof. Of course.

Effects of the Invention As described above, according to the present application, the closed state of the pair of binding rods is maintained by locking between the locking pieces provided on the pair of operating plates and the locking hole provided on the lever piece. Therefore, there is no risk that the binding rod will open unnecessarily due to an external impact force as in the conventional case, and in particular, the outer edge or upper surface of the tip of the locking piece slides into contact with the side edge or upper edge of the locking hole. When the projecting portion is formed, the locking state between the locking piece and the locking hole is ensured, and a notch recess for intervening the action piece is provided at the center of the end of the stack, and the lever portion is When the finger rest is formed with an outward U-shape in cross section, when the locking piece and the locking hole are locked, the inner surface of the lever piece comes into contact with the end surface of the plywood, and the locking hole A part of the locking piece that protrudes further outward is located within the outer surface of the finger rest, which has advantages such as a good appearance.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is an overall plan view with some parts omitted, FIG. 2 is an enlarged sectional view taken along the line r-r in FIG.
FIG. 3 is a longitudinal sectional view of the end portion, FIG. 4 is a partially cutaway plan view of the end portion, and FIG. 5 is a sectional view of the end portion in another embodiment. In the figure, (1) is a laminate, (2) is a rib, (3) is a notch,
(4) is the operating plate, (5) is the binding rod, (8) is the operating piece, (8
)" is the locking piece, a is the overhanging part, (9) is the lever part, (1
0) is the finger rest, (12) is the support part, (11) is the operation part,
(I4) is a locking hole.

Claims (4)

[Claims] (1) A pair of receiving ribs of a sheath plate having receiving ribs bent inwardly and downwardly on both edges along the longitudinal direction so that the inner edges thereof can be bent in a valley-fold shape and a mountain-fold shape. The outer edges of the elongated actuating plates are engaged with each other, and a pair of arc-shaped binding rods, which are respectively implanted in the pair of actuating plates, are inserted into the sheath plate through notch holes provided on both side edges of the sheath plate. The tips of the pair of binding rods are protruded upward and can be opened and closed by the valley-fold and mountain-fold bending actions of the pair of actuating plates, and the inner edge joints of the actuating plates are pressed to form a mountain-fold shape. A lever piece having an operating part that bends in a direction is supported in a tiltable manner on both ends of the sheath plate, and stands vertically at at least one longitudinal end of the pair of actuating plates; An operating piece having a locking piece that bends outward is provided at the tip, and a pair of actuating plates are bent in a valley-fold shape on the lever piece,
A ring fitting characterized in that a locking hole is provided for locking with the pair of locking pieces. (2) The ring fitting according to claim 1, wherein an overhang portion is formed on the outer edge of the distal end of the locking piece to make sliding contact with the side edge of the locking hole. (3) The ring fitting according to claim 1, wherein an overhang portion is formed on the top surface of the distal end of the locking piece to make sliding contact with the upper edge of the locking hole. (4) A notched recess for intervening the action piece is provided at the center of the end of the sheath plate, and the finger rest of the lever piece is formed to have an outwardly U-shaped cross section. ring metal fittings.