Press for attaching nuts to pipes

Abstract

A press for attaching nuts to pipes has an upper base ( 3 ) fixed on guide posts ( 4, 4 ) erected at both sides of a front part of a lower base ( 2 ), a movable support ( 5 ) having a base end supported rotatably around a horizontal axis ( 9 ) at a rear end of the lower base ( 2 ), and a front end extending to the front end side of the lower base ( 2 ) so as to be movable circularly in a verticaldirection, thereby covering and supporting pipes ( 50 ), a nut receiving recess 16 provided in a piston ( 14 ) of a hydraulic cylinder ( 10 ) for pressing a lower pattern disposed at the front end ofthe movable support ( 5 ), and disposed at the upper end of a lower pattern ( 15 ) moving up and down by projecting upward from a cylinder case ( 11 ), a lifter ( 20 ) for moving up and down the front end position of the movable support ( 5 ) by abutting against and supporting in a slightly lifted state, a stopper ( 30 ) for abutting against and supporting the middle position of the movable support ( 5 ) by lifting slightly, and moving up and down so that an opening end face ( 51 ) of the pipe ( 50 ) attached to the movable support ( 5 ) may be positioned in contact therewith, a crimping die ( 42 ) as an upper pattern mounted on the upper pattern support ( 5 ) movably provided vertically along the guide posts ( 4, 4 ) and movably disposed vertically on a same axial line as the lower pattern ( 15 ), and a hydraulic cylinder ( 45 ) for pressing an upper pattern disposed on the upper base ( 3 ), and pressing the crimping die ( 42 ) downward. Hence the press is suited to attaching of nutsto pipes of small diameter, in particular, and it is easily automated.

Description

technical field [0001] The present invention relates to a punching device for fixing a nut on a pipe material, especially a metal square pipe (corner pipe). Background technique [0002] A device for fixing a nut on a pipe is known from Patent Document 1: a piercing nut is used to fix the nut on the inner wall of a metal square pipe, so that it can be screwed from the outside of the square pipe, wherein the so-called The piercing nut is made by punching the metal plate by the nut itself, and at the same time caulking the pierced opening peripheral part and pressing it into the groove provided on the side wall surface of the nut, so as to fix the nut on the metal plate . [0003] The device disclosed in the above-mentioned Patent Document 1 is a manual type, has a background of the times, and has not been put into practical use until now. [0004] Patent Document 1: Japanese Patent Publication No. 53-16394 (Patent No. 0943112) Contents of the invention [0005] The prese...

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Problems solved by technology

[0003] The device disclosed in the above-mentioned Patent Document 1 is manual, and it has the background of the times, and it has not been put into practical use until now.

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