Fastener and manufacturing method thereof

Abstract

The invention discloses a fastener used for clamping an object. The fastener comprises a first clamping arm and a second clamping arm, wherein the first end of the first clamping arm and the first end of the second clamping arm are connected with each other in a rotating mode through a rotary connecting mechanism, and a cavity used for containing the object when the object is clamped is formed between the first clamping arm and the second clamping arm. The rotary connecting mechanism comprises a hinge pin and a winding part, wherein the winding part is wound around the hinge pin and can rotate around the hinge pin, the first end of the winding part is connected with the first clamping arm or the second clamping arm or serves as a part of the first clamping arm or the second clamping arm, the hinge pin is connected with the second clamping arm or the first clamping arm or serves as a part of the second clamping arm or the first clamping arm, and the second end of the winding part is located in the cavity and makes rubbing contact with the object when the fastener is used for clamping the object. The invention further discloses a manufacturing method of the fastener. In addition, the invention further discloses a self-locking device which can be used in the fastener for example.

Description

technical field [0001] The invention relates to the technical field of fastening devices, in particular to a fastener for clamping objects and a manufacturing method of the fastener. The fastener is, for example, a construction fastener used to build a scaffold. Background technique [0002] Fasteners, as a fastening device, are widely used in various fields for fastening, for example, they are used in the construction field to build scaffolding. In the prior art, the fastener generally includes a cover plate and a base (hereinafter collectively referred to as “clamp arms”), and a rotatable connection is formed between the cover plate and the base through a pin shaft. [0003] Existing fasteners generally include fasteners made by casting and fasteners formed by hot forging. [0004] In the cast fastener, the through hole on the cover plate for the pin shaft to pass through and the through hole on the base for the pin shaft to pass through are both formed by a perforation ...

AI Technical Summary

Problems solved by technology

However, the processing of the existing steel plate fasteners is cumbersome, the weight is large, and the production links are many, which leads to slow production speed, especially its low strength.

Since the fastener uses a triangular plate-shaped center plate, the fitting surface with the clamped object is not large enough, resulting in limited friction with the clamped object, and the anti-skid effect is general; and the rotation between the cover plate and the base The connection part is easy to loosen during use

[0007] The common disadvantage of the prior art fasteners including the above fasteners is that their fastening strength is not high, which is mainly due to the insufficient strength of the pin connection between the cover plate and the base, and the pin connection only relies on Its own structural strength and force to provide the required fastening strength

In order to further improve the strength of the fastener, it is necessary to increase the thickness of the cover plate, the base and the connecting part of the pin shaft, thereby increasing the material usage of the fastener, resulting in an increase in cost and the weight of the fastener itself

[0008] The safety performance of traditional steel fasteners is slightly better, but due to the hot forging, hollowing, assembly and other processes, the production cost is too high, and the cost is 1-2 times higher than that of traditional casting fasteners (such as malleable steel fasteners). market is barely used

[0009] In addition, in traditional fasteners, the active link (or rotational connection) between the clip arms of the fastener is a weak link. Once deformed or damaged, it is often irreversible, and the fastener is immediately damaged, resulting in a reduction in the safety of the fastener

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