JP2001254720A - Energy absorption type combined washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce breakage of a member and breakage of a fixture in the case when large force such as earthquake force, etc., acts on plural members fixed by the fixture, and to improve working performance when mounting this combined washer. SOLUTION: Dynamic energy is converted to thermal energy and dispersed to outside by making a play for fixture of the members on each other by clamping a spiral screw between two flat washers 1 (square to round in shape), and by using the play against large force such as an earthquake. Consequently, it is possible to prevent breakage of a structural member of a building, a structure, a large mechanical device, etc., and breakage of a fixture, etc. A product is delivered in a state where the two flat washers 1 are fully pressed and contracted (held by a fixing band) at the stage of delivery of the product as a means to improve working performance when fastening this combined washer by a nut 3, and the fixing band is cut and released at the stage of using it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer for fixing devices (such as metal fittings) for fixing a plurality of members. It has been conceived to reduce damage.
That is, as shown in FIG. 1, the structure is such that a helical spring (conical spring) (2) is sandwiched between two flat washers (shape from square to circular) (1). Can be used to create play for the fixation between members. Therefore, for large forces such as earthquakes, this play is used to convert the mechanical energy of the force into thermal energy (molecular friction in the process from the conversion into the potential energy of the elastic force of the spring until the spring stops expanding and contracting). <Damping vibration>) and release to the outside, it is possible to prevent damage to structural members such as buildings, structures, and large mechanical devices, and to prevent damage to fixing devices and the like, and its utility value is extremely large. Now,
The tightening position of the composite washer and the tightening nut (3) (the interval between the two flat washers (1)) differs depending on the material of the member. I do. Next, as a device for improving work efficiency when attaching the composite washer, at the stage of product shipment, as shown in FIG. 2, two flat washers (1) are used.
Holes are formed in each of the four corners, and the four corners are fixed with fixing bands (such as resin bands) (4) while the flat washer is fully compressed. Then, at the stage of using this, the nut (3) is set at a predetermined position (there is no load applied, so the hand is fast), and then the fixing band is cut off (a commercially available resin band is hit with a hammer or the like. The hook can easily come off.) As a result, at the time of release, the elastic function of the spring works to complete the fixing, and the working efficiency can be improved.

[0002]

BACKGROUND OF THE INVENTION Structural members such as buildings, structures, large machinery and the like are fixed by mutual fixing devices.

[0003]

2. Description of the Related Art There has been no play for fixing members.

[0004]

Problems to be Solved by the Invention Avoidance of breakage of each member and damage of the fixing device when a large force such as seismic force acts on the member fixed by the fixing device, and the mounting of this composite washer Device to improve work efficiency.

[0005]

[Means for Solving the Problems] When a play is made with respect to the fixing between the members, and when two flat washers are pressed and shrunk to a full capacity at the stage of product shipment and shipped with being fixed with a band or the like, and used. Then, after putting the nut in the desired position, the band was cut off.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

[0007]

As described above, the durability of the member and the fixing device are increased, and the working efficiency in mounting the composite washer is increased.

[Brief description of the drawings]

FIG. 1 is a formal plan view showing the structure of an energy-absorbing composite washer according to the present invention.

FIG. 2 is a perspective view showing a state in which two flat washers (1) are pressed to a full extent and four corners thereof are fastened with fixing bands (4).

[Explanation of symbols]

 1 --- Two flat washers. 2 ---- helical spring. 3 ---- Nut. 4 ---- Fixed band.

Claims (2)

[Claims] 1. An energy-absorbing composite washer in which a spiral spring is arranged between two flat washers. 2. The energy-absorbing composite washer according to claim 1, wherein the two flat washers are pressed and shrunk to a full capacity and fixed.