Fastening tool

Abstract

Provided is a technology pertaining to a fastening tool that uses a fastener having a bolt shaft and an end region, which are in an integrated state when swaging is completed. The technology facilitates power output management necessary for swaging and can contribute to device size reduction. The fastening tool fastens a work material using a bolt and collar without breaking the bolt shaft. A control unit performs a swaging operation (S12, S13) by controlling a motor drive current at a target current value, and ends the swaging operation on the basis of the motor rotational speed (S14, S15).

Description

technical field [0001] The present invention relates to a fastening tool for fastening a work piece disposed between a head and a collar by a fastener, wherein the fastener has: a head and a groove formed therein A fastening bolt (bolt) integrally formed with the shaft portion of the fastening bolt; and a hollow cylindrical sleeve capable of engaging with the fastening bolt. Background technique [0002] Regarding the fastening of the work piece by the fastener constituted as described above, two methods are known: the caulking fastening is completed while the end region of the shaft portion of the fastening bolt is kept integral with the shaft portion, Or the caulking is done in a state where the end region of the shaft is broken and removed from the shaft. In the former method (first method), since the fastening can be performed without breaking the shaft portion, there is an advantage that additional steps such as applying a coating agent to the broken part again are not...

AI Technical Summary

Problems solved by technology

[0004] For the fastening tool of the work piece using the fastener related to the above-mentioned first aspect, in order not to damage the end region of the shaft portion during the caulking fastening, it is necessary to carefully perform the caulking and fastening work. However, in the fastening tool disclosed in the above publication, since the output control using fluid pressure is performed, it is easy to perform the output management required for caulking fastening, but on the other hand, it is difficult to simplify the device structure. or compact this problem point

[0005] In addition, unlike the above-mentioned fasteners, for example, as shown in Japanese Patent Laid-Open Publication No. 2013-248643, an electric fastening tool using a so-called blind rivet is known. Blind rivets are fastened in a state where the shaft is broken, so there is no need for careful output management during caulking and fastening work like the fasteners related to the above-mentioned first method.

Images