JPH0114454Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present application relates to a binder metal fitting, and in particular protects the binding tube from deformation when a cover body equipped with a binder metal fitting is dropped while sheets are being bound.

Generally, this type of binder metal fitting is related to a binding tool for binding heavy objects, and therefore, a binding object such as a record ledger using this type of binder metal fitting is generally Because of their considerable weight, they are often dropped when they are taken out of a bookshelf or carried around, and an extremely large impact force is applied to them when they fall.

By the way, in this type of binder metal fitting, the opening/closing plate is attached to the edge of the horizontal part of the board, so it is important to note that sufficient mechanical strength can be obtained at the attachment part, and that the binding tube is attached to the opening/closing plate. On the other hand, since it is provided in a cantilever shape, a large bending force acts on the tip of the binding tube due to the impact force, and this bending force is applied to the engagement protrusion through the connecting rod. This acts on the engagement portion with the locking hole, thereby applying a large load in the longitudinal direction to the locking plate.

However, in general, the mechanical strength of attaching the locking plate to the back of the vertical part of the board is weaker than that of attaching the opening/closing plate to the horizontal part of the board. As a result, the locking plate may slide more or less in its longitudinal direction, and as a result, the binding tube may be deformed and the binding function may be impaired.

Therefore, the present application improves the defects of the conventional product.The embodiment thereof will be described in detail below with reference to the drawings.1, a long metal plate is bent into an L shape in the width direction, and the vertical part is bent. 2 and a horizontal portion 3 are integrally formed, and cutout portions 4 and cylindrical portions 5 are alternately provided at the edge of the horizontal portion 3 of the substrate 1. Further, the vertical portion 2 of the substrate 1 is provided with a recessed portion 6 cut out at the center of the upper end, and protruding portions 7, 7 located at the front and rear of the vertical portion in the length direction and protruding from the back side, respectively. Reference numeral 8 denotes an opening/closing plate having the same length as the substrate 1 and having hollow binding tubes 9, 9 protruding from the inner surface at a right angle at a predetermined interval. A cylindrical portion 10 that engages with the substrate 1 is provided, and an opening/closing plate 8 can be freely raised on the horizontal portion 3 of the substrate 1 by inserting a shaft rod 11 through the cylindrical portion 10 and the cylindrical portion 5 provided on the substrate 1. It is hinged on. 12 is the shaft 1
An opening/closing plate 8 for the substrate 1 provided at an intermediate position of 1
a biasing spring for constantly biasing outward rotation; 13;
is a locking plate that is slightly shorter than the substrate 1 and has a length that matches the distance between the protrusions 7, 7;
The central upper part of 3 is slightly bulged inward so as to fit into the recessed part 6 provided in the vertical part 2 of the substrate 1,
Locking holes 15, 15 are bored at both end positions of the bulging portion 14, and the locking holes 15, 15 fit with the center holes of the binding tubes 9, 9 when the opening/closing plate 8 is erected.
At the center of the upper end of 4, there is a sloped part 16 that slopes outward.
is formed. This locking plate 13 includes a cylindrical part 17 provided at the lower edge of the vertical part 2 of the substrate 1 so as to overlap with the back surface thereof, and a branch piece 18 provided by cutting and bending the lower part of the vertical part 1. A biasing spring 20 is installed at an intermediate position of the shaft rod 19 to press the locking plate 13 in an overlapping manner at all times on the back surface of the substrate 1. It is provided. 21 has approximately the same length as the base plate 1, and has connecting rods 22, 22 projecting at right angles on the inner surface to be inserted into the binding tubes 9, 9, and connecting rods 22, 22 extending from the bases of the connecting rods 22, 22 on the outer surface. A restraining plate provided with an extended locking protrusion 23, and a concave portion 24 at the center of its upper edge for exposing the inclined portion 16.
However, a bulge 25 that bulges slightly inward is formed at the center of the lower edge. Reference numeral 26 denotes a mounting hole for fixing the substrate 1 to the inner surface of the back of the cover plate A, which has cover doors arranged in a flexible manner on both sides of the back.

When the sheets are being loaded, as shown in FIG. The opening/closing plate 8 is locked in the provided locking holes 15, 15, and is placed in an upright state so as to face the vertical portion 2 of the substrate 1. When you want to increase or decrease the number of sheets to be loaded from this state, first press the inclined portion 16 with your finger and rotate the locking plate 13 outward against the urging force of the urging spring 20. The engagement between the locking hole 15 and the engagement protrusion 23 of the restraining plate 21 is disengaged, and the opening/closing plate 8 is rotated outward by the biasing force of the biasing spring 12. In this state, the connecting rod 22 of the restraining plate 21 is removed from the binding tube 9, and the number of sheets to be bound is added to or removed from the binding tube 9. After that, connect the connecting rod 22 of the holding plate 21 again,
22 into the binding tubes 9, 9, and in this state close the opening/closing plate 8.
is rotated in the standing direction against the biasing spring 20. Then, the locking projections 23, 23 automatically lock into the locking holes 15, 15 of the locking plate 13 while being guided by the bulges 14 provided on the upper edge of the locking plate 13, as shown in FIG. Restore to the state shown in .

As described above, the present application not only allows the binder metal fittings to be opened and closed with extremely simple operations, but also allows the binder metal fittings to open and close because the weight of the paper sheets does not act on the locking plate at all in the stapling state. There is no risk of it opening accidentally, and both longitudinal ends of the locking plate that locks the locking protrusion of the holding plate are
Since it can come into contact with the protrusion provided on the back of the vertical part of the board, even if the booklet is accidentally dropped vertically while the paper is being stacked, the weight of the paper that acts on the binding tube will be reduced. is received by the protrusion through the locking plate, and has the advantage that there is no risk of deformation of the binding tube or the connecting rod.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is an exploded perspective view, FIG. 2 is a partially cutaway plan view, FIG. 3 is a longitudinal sectional view, and FIG. 4 is a rear view. In the figure, 1 is a base plate, 2 is a vertical part, 3 is a horizontal part, 7 is a protruding part, 8 is an opening/closing plate, 9 is a binding tube, 12 is a biasing spring, 13 is a locking plate, 15 is a locking hole, 20 21 is a biasing spring, 21 is a retainer, 22 is a connecting rod, and 23 is a locking protrusion.

Claims (1)

[Scope of utility model registration request] An opening/closing plate, which has a binding tube protruding from its inner surface and is constantly biased with an outward rotational force by a biasing spring, is hinged to the horizontal edge of a board having an L-shaped cross section.
The lower edge of a locking plate, which is pressed by a constant biasing spring so as to be in pressure contact with the rear surface of the vertical portion, is rotatably attached to the back surface of the vertical portion of the board, and a locking hole is formed in the locking plate. A binder metal fitting comprising: a connecting rod to be inserted into the binding tube; and a retaining plate having a locking protrusion on the outer surface to lock with the locking hole when the opening/closing plate is erected. . A binder metal fitting, characterized in that a pair of protrusions for receiving both ends of the locking plate are provided at two locations in the longitudinal direction on the back surface of the vertical portion of the substrate.