JPH0140706Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a file binding tool called a so-called Z-type file.

(Prior Art) As is well known, in the conventional Z-type file, the rod shaft at one end of the torsion coil spring exhibits a Z shape and is fixed to the clamping body, and the rod shaft at the other end of the torsion coil spring takes on a Z shape. is fixed to a lever, and when the lever is rotated, the rod shaft portions at both ends of the torsion coil spring are deformed, and the elastic restoring force based on the deformation is used to press the clamping body to the substrate. It is configured like this.

(Problem to be solved by the invention) In the conventional Z-type file mentioned above, when the thickness of the paper sheets to be stapled that is sandwiched between the sandwiching body and the board exceeds a certain value, the paper sheets to be stapled are There is a drawback that paper sheets are easy to pull out, and the present invention aims to solve this problem.

(Means for Solving the Problems) In order to solve the above problems, the present invention fixes the rod shaft at one end of a torsion coil spring to a clamping body, and the rod shaft at the other end of the torsion coil spring. is for files configured to attach to a lever and rotate the lever to apply deformation to a torsion coil spring and use the elastic restoring force based on the deformation to obtain the binding force of the sandwiched body. In the binding tool, the coil part of a second torsion coil spring is wound in series around the spindle around which the coil part of the torsion coil spring is wound, and the rod at one end of the second torsion coil spring is wound. The shaft is connected to the clamping body, and the rod shaft at the other end is positioned inside the lever so that it can come into contact with the lever and receive a load only when the clamping body floats a required height above the board. The present invention provides a file binding tool characterized by the following features.

(Example) An illustrated example of the present invention will be described in detail below.

First, in the perspective view of FIG. 1, reference numeral 1 denotes a substrate to be riveted to the cover body A, and a side wall 3 having an engagement hole 2 is provided on one side edge of the substrate 1, and a side wall 3 is provided at a required distance from this side wall 3. Three shaft support plates 4, 4', 4'' are bent from the base board 1 and erected so as to face the side wall 3 on a separate board, and the shaft support plates 4, 4'' at both ends and the side wall 3 A rod shaft portion at one end of the Z-shaped pin bodies 5, 5' is rotatably installed between the Z-shaped pin bodies 5, 5', and the rod shaft portion at the other end is fixed to both ends of the clamping body 6. Pivot support plate 4' and side wall 3
A support shaft 7 is installed between the support shaft 7 and a coil portion of a first torsion coil spring 8 is wound around the side end of the support shaft 7 that is closer to the shaft support plate 4' by approximately 1/2 of the total length of the support shaft 7. The rod shaft portion 8a at one end of the first torsion coil spring 8 is connected to the center portion of the clamping body 6, and the rod shaft portion 8a at the other end.
b is fixed to the inner surface of a lever 9 whose base end is rotatably fixed to the support shaft 7, and further attached to the side wall 3 of the support shaft 7.
A second torsion coil spring 1 is installed at approximately 1/2 of the side.
The coil portion 0 is the first torsion coil spring 8 described above.
The rod shaft portion 10a at one end thereof intersects the upper surface of the rod shaft portion 8a of the first torsion coil spring 8 and is connected to a substantially central portion of the clamping body 6. At the same time, the rod shaft portion 10b at the other end is connected to the lever 9.
The clamping body 6 is placed in a free state inside the body, and is placed in a state where it can come into contact with the lever 9 and undergo deformation only when the clamping body 6 floats above a certain value.

(Function) The function of the present invention will be explained based on sectional views (FIGS. 2 to 5) of the above embodiment in use.

First, when the sheets to be bound are thin, only the first torsion coil spring 8 acts (see FIGS. 2 and 3). That is, the rod shaft portion 10b of the second torsion coil spring 10 is in a free state relative to the lever 9 and does not receive any load. This condition is the same as that of the conventional Z-type file. However, if the thickness of the paper sheets to be stacked exceeds a certain value, that is, the sandwiching body 6 becomes thicker than the substrate 1.
When the engaging claw (not shown) of the lever 9 must be engaged with the engaging hole 2 of the side wall 3 while the lever 9 is floating to a required height, the torsional angle of the lever 9 increases, so 10 rod shaft parts 1
0b comes into contact with the lever 9 and receives a load (see Figures 4 and 5), and the elastic restoring force of the second torsion coil spring 10 also acts on the clamping body 6, so that the two torsion coil springs end up Since the resultant force of 8 and 10 acts, the pressing force of the clamping body 6 increases significantly. In the above embodiment, since the rod shaft portion 10a of the second torsion coil spring 10 intersects with the rod shaft portion 8a of the first torsion coil spring 8 and is connected to the clamping body 6, the second torsion The force of the coil spring 10 is configured to act on the clamping body 6 via the rod shaft portion 8a of the first torsion coil spring 8.

(Effect of the invention) The present invention has the above-mentioned structure and operation, and even if the thickness of the sheets to be bound increases, the second torsion coil spring acts and the binding force increases. This can effectively prevent the paper sheets to be pulled out.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view, and Fig. 2 is a cross section of the stacked state when the sheets to be sewn are thin at the position of line A-A in Fig. 1. Figure, 3rd
The figure is a sectional view of the stacked state when the paper sheets to be bound are thin at the line B-B in Figure 1, and Figure 4 is a cross-sectional view of the stacked state at the line B-B in Figure 1.
5 is a sectional view of the stapling state when the sheets to be stapled are thick at the position of line A, and FIG. FIG. 1... Board, 2... Engaging hole, 3... Side wall, 4,
4', 4''...Axle support plate, 5,5'...Pin body, 6...
...Pinching body, 7... Support shaft, 8... First torsion coil spring, 8a... Rod shaft part, 8b... Rod shaft part, 9...
...Lever, 10...Second torsion coil spring, 1
0a... Rod shaft part, 10b... Rod shaft part, I cover body,
(b) Paper leaves to be bound.

Claims (1)

[Scope of utility model registration request] The rod shaft at one end of the torsion coil spring is fixed to the clamping body, and the rod shaft at the other end of the torsion coil spring is fixed to a lever and the lever is rotated to deform the torsion coil spring. In a file binding tool configured to obtain the binding force of the sandwiched body by using the elastic restoring force based on the deformation of the file, the support shaft around which the coil part of the torsion coil spring is wound. The coil portion of a second torsion coil spring is wound in series, the rod shaft portion at one end of the second torsion coil spring is connected to the clamping body, and the rod shaft portion at the other end is positioned inside the lever. 1. A file binding tool, characterized in that it is arranged in such a state that it can come into contact with a lever and receive a load only when the clamping body floats up to a required height from a substrate.