Sleeve for connection and washer for supporting used reacting force and connecting structure

Abstract

The invention provides a sleeve for connection and a washer for supporting used reacting force, and connection can be made only via nut fixing without washer fixing, furthermore, a connecting structure is provided to connect in a mode that a nut and a bolt are not in a ''corotation''. A sleeve (B) used for a nut connection is provided with: an inner sleeve part provided with a clamping mechanism clamping with a nut, etc.; an outer sleeve part clamping with a washer (A) provided with an outer edge part (2), the outer edge part is provided with clamping tooth and the surface is formed to be a conical surface close to the bottom surface side at the outer edge side; an inner sleeve part (21)and an outer sleeve part (22) are mutually connected via mechanisms capable of rotating in reverse directions. The outer sleeve part is provided with clamping pawls (24) clamping with the clamping tooth, the lower end of the clamping pawl (24) is formed by a conical surface close to the base end side at the inner diameter side. Friction factor increase processing is applied to the face of a bolt head in a contact with the surface of the connected subject.

Description

technical field [0001] The present invention relates to a bolt or a nut with a bolt head that is used for connecting a plurality of connected parts in a reinforced structure or a mechanical structure, and can receive a washer by utilizing the reaction force adjacently arranged to make only the bolt A tool that rotates on the head side or on the nut side is a "sleeve for connection (also referred to as a sleeve for nut connection within the scope of this specification and claims)"; Washers" and a "connection structure" applicable to the connection between the connection sleeve and the reaction force receiving washer. Background technique [0002] In recent years, in reinforced structures such as bridges, when bolts and nuts are used to connect (join) multiple parts (connected objects), in order to make the axial force acting on the bolts reach a specified value after the connection is completed, It is necessary to use a so-called "torque wrench" or the like so that the torqu...

AI Technical Summary

Problems solved by technology

[0015] However, in the case of screwing bolts and nuts on the wall surface and the like in a state where the nuts or bolts on the back cannot be reached by hand, for example, when the threaded portion of the bolt exposed on the wall surface is passed through the wall by a torque wrench, When the screwed nut is rotated and connected, another operator must fix the bolt head on the back side of the wall with a wrench or the like.

[0016] In this case, two people are usually forced to work in teams, and they must confirm the bolts and nuts to be connected before connecting when they cannot see each other, and the work efficiency is extremely low.

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