JPH0529906Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present application relates to a file fitting for binding documents, paper sheets, etc.

Conventional technology Conventionally, in a file fitting comprising a ring-shaped binding rod that can be opened and closed in the left and right directions from the position of the joint, even when an external force is applied to the binding rod from documents to be bound, the joining surfaces do not touch each other. A file metal fitting is known in which a protrusion is provided at the center of one joint surface and a recess that engages with the protrusion is provided at the center of the other joint surface to prevent displacement.

Problems to be solved by the invention By the way, according to the conventional configuration described above, when the binding rod is closed, the outer periphery of the joint exists as a single cutting line along the entire circumference of the binding rod. In particular, there was a fear that the binding holes of thin sheets of paper could become caught in the joints, hindering the sheet turning operation, or being damaged at the position of the binding holes.

In particular, conventional binding rods have the disadvantage that gaps tend to form at the joints of the binding rods because they have poor load bearing capacity against the load of sheets of paper etc. that are bound into them, and they are also divided into left and right halves. The shapes of the binding rods are different, and therefore, there is a manufacturing disadvantage in that the left binding rod and the right binding rod must be manufactured separately.

Means for Solving the Problem Therefore, the present application proposes a file fitting that is divided into left and right halves and provided with a ring-shaped binding rod that connects the left and right binding rods so that they can be opened and closed. and a convex portion and a concave portion that can be engaged with each other are formed in one half and the other half facing the joint surface, respectively, on each joint surface, and further, one half A recess and a protrusion that extend in a straight line and are capable of engaging with each other are provided at the center of the convex portion provided on one half and the center of the concave portion provided on the other half, respectively. This is a characteristic feature.

Function: In the closed state where the binding rod is joined, the convex portion and the concave portion and the protrusion and the recessed portion engage with each other, and the binding rod is protected against external force from any direction around the entire circumference. , the bonding surfaces do not shift from each other, and the outer periphery of the bonding portion is formed with an uneven cutting line.

Embodiments Below, the embodiments of the present application will be described in detail based on the drawings. Reference numeral 1 denotes a long substrate having a curved cross section, and receiving ribs 2 bent inward on both longitudinal edges thereof. However, there is also a mounting hole 3' at the longitudinal end.
A recessed portion 3 is provided integrally with each other. 4
is a ring-shaped binding rod which is divided into left and right halves, and the ends of the divided binding rods 4a and 4b are joined 5 so as to be openable and closable.

As shown in FIG. 4 A and B and FIG. The concave portions 7 are arranged in parallel on the right half of the portion 6, and at the center of the convex portion 6 and the concave portion 7,
Each has a concave part 8 and a protrusion 9 extending in the left-right direction in a straight line, and the other joint surface also has a convex part 11 on the left half and a concave part on the right half when facing the joint surface. The portions 10 are arranged in parallel, and the convex portions 1
1 and the concave portion 10, respectively, are provided in a straight line with a concave portion 13 and a protrusion 12 extending in the left-right direction, the convex portion 6 and the concave portion 10, and the concave portion 7 and the convex portion 11. , the recess 8 and the protrusion 12 and the protrusion 9 and the recess 13 are in an engaging relationship, respectively,
Each joint surface of the split binding rods 4a and 4b has the same shape. Therefore, the same split binding rods 4a and 4b can be used. Reference numerals 14a and 14b denote a pair of long elastic plates located on the lower surface of the substrate 1 and stretched between the receiving ribs 2 in a V-shape.
The pair of elastic plates 14a, which are bent and interlocked,
14b, both lower ends of the binding rod 4 are fixed through elongated holes 15a, 15b provided in the substrate 1, and the binding rod 4 has a pair of elastic plates 14a, 14b bent in a V-shape. In this state, the outer periphery of the joint is formed into an uneven line by the convex and concave parts on the top and bottom surfaces, and by the protrusions and depressions on the left and right sides. form.

As shown in FIG. 2, when the binding rod 4 is closed, the convex part 6 and the concave part 7, the concave part 10 and the convex part 11, and the concave part 8 and the convex part 9. ,
The protrusion 12 and the recess 13 are engaged with each other, and when the split binding rods 4a and 4b are pulled in the left-right direction from this state, the pair of elastic plates 14a and 14b are
As shown in FIG. 3, it is inverted in an inverted V shape and separated at the joint portion 5.

Therefore, in this state, the binding hole of the paper sheet is inserted into one of the divided binding rods 4a as in the conventional method,
The same applies when removing paper sheets.

Effect of the invention Since the present application is constructed as described above, the vertical and horizontal directions applied to the binding rod are caused by the mutual engagement of the concave portion and the convex portion and the protrusion and the concave portion. It can sufficiently withstand the load and there is no risk of the joint becoming misaligned, and the outer periphery of the joint of the binding rod has an uneven cutting line, leaving no room for the binding holes such as paper sheets to get caught. Therefore, it is possible to smoothly turn over paper sheets, etc., and there is no risk of damage.Furthermore, according to the present application, since the joint surfaces of the split binding rods are made into the same shape, the same machining process can be performed. It has the advantage of being easy to create, convenient to manufacture, and inexpensive.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a general plan view, FIG. 2 is a side view of a partially cut out and partially enlarged closed state, and FIG. 3 is a partially cut out and open state. 4A and 4B are a top view and an end view of one of the split binding rods, and FIGS. 5A and 5B are a top view and an end view of the other split binding rod. In the figure, 1 is the substrate, 2 is the receiving rib, 4 is the binding rod, 4
a, 4b are divided binding rods, 5 is a joint, 6, 11 are convex parts, 7, 10 are concave parts, 8, 13 are hollow parts,
9 and 12 are protrusions, and 14a and 14b are elastic plates.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a file metal fitting that is divided into left and right halves and is provided with a ring-shaped binding rod that connects them so that they can be opened and closed, the left and right binding rods that are divided into two parts have the same shape. and forming a convex portion and a concave portion that can engage with each other on one half and the other half thereof toward the joint surface, respectively, on each joint surface,
Furthermore, a recess and a protrusion that extend in a straight line and are capable of engaging with each other are provided at the center of the convex portion provided on one half and the center of the recess provided on the other half, respectively. File fittings characterized by the fact that they are provided with. (2) Utility model registration claim No. 1 consisting of a convex portion and a concave portion arranged in parallel in the lateral direction facing the joint surface.
File fittings listed in section. (3) The file fitting according to claim 1 or 2, wherein the convex portion and the concave portion have a rounded wave shape when viewed from the upper surface of the binding rod.