KR20050076984A - Safety device of press tool for jointing of metal pipe joint. - Google Patents

Abstract

The present invention relates to a safety device of a metal pipe connecting press tool (patent application No. 10-2002-0071340) for a welded pipe fitting, in particular, when the press tool is pressed by a hydraulic piston rod during the crimping of the pipe fitting. The hook plate ⑥ receives tensile force and bending moment at the same time and breaks so that the broken pieces scatter and cause safety accidents. It is.

Description

SAFETY DEVICE OF PRESS TOOL FOR JOINTING OF METAL PIPE JOINT.}

The present invention relates to a safety device for a metal pipe connecting press tool (Patent Application No. 10-2002-0071340), wherein the hook plate⑥ of the press tool is pressed by the hydraulic piston rod ② during the press fitting operation of the press tool. Due to the fact that the tensile force and the bending moment are received at the same time, the fracture may be broken. At this time, the fragmentation of the fracture portion is scattered and the risk of a safety accident that is generated is large. I can't find it.

The technical problem is to prevent the safety accident by fixing the broken fragments so that the fractured fragments are not scattered even when the hook plate⑥, which has a high probability of breakage, is broken by the pressing force of the piston rod ② of the hydraulic cylinder.

As described above, in order to prevent scattering of debris even when the hook plate ⑥ of the press tool (Patent Application No. 10-2002-0071340) is picked up during the press-pressing operation of the press tool, the rear surface of the hook plate ⑥ Safety wire of metal wire or plate which is installed on the outside separately along the length of hook plate⑥ so that both ends are fixedly connected to the upper fixing ⑧ and the lower fixing ⑨ of hook plate⑥. It consists of ①.

At this time, it is more safe to install the safety wire ① in a curve rather than a straight line.

The length of the hook pin ③ on the hook pin hole 레 around the lower end of the hook plate ⑥ and the hook plate ③ protruding outward in both directions and the hook pin hole ⑮ of the upper part of the base block. Breaking the hook pin ③ toward both sides of the hook plate ⑥ by forming an inwardly projecting base block locking protrusion 도록 such that the two-sided interval dimension of the inner surface thereof is smaller than the thickness of the hook pin ③ length direction of the hook plate engaging protrusion ⑫. It is also possible to prevent the entire scattering of the hook plate ⑥ according to the above method, and in the same way, the safety steel wire ① is also mounted on the outside of the rear surface of the upper jaw ⑦ and the connecting plate ,, and each of the members of the fixing pin ⑤ and the jaw pin ④ is also caught By forming projections and assembling each other, the emergency risk of fragmentation due to breakage accidents during all operations of the press tool is safely prevented.

In the event of breakage of the hook plate⑥, which may occur during the press-pressing operation of the press tool, the scattering of fragments due to the breakage is prevented by the safety steel ①, which is effective in preventing the safety disaster.

1 is a front view of a press tool before connecting a crimp fitting to a shaft;

Figure 2 is a front view before the shaft diameter connection of the press tool to remove the fixing pin ⑤ to the connecting plate ⑩ and the base block 일체 integrally.

Figure 3 is a partial cross-sectional view of the assembled state of the base block ⑪ and the hook plate ⑥ is formed with a locking projection ⑬, ⑫, respectively.

Figure 4 is a rear view of the hook plate ⑥ on which the safety steel wire ① for preventing the scattering of debris is mounted.

5 is a side cross-sectional view of the hook plate ⑥ on which the safety steel wire ① is mounted.

     -Code description for main parts of drawing-

1: Safety steel wire 2: Piston rod

3: HOOK PIN 4: JAW PIN

5: Fixing pin 6: Hook plate

7: upper jaw 8: upper government

9: lower fixing part 10: connecting plate

11: BASE BLOOK 12: hook plate hanging protrusion

13: base block locking protrusion 14: crimping die (DEIS)

15: Hook pin hole.

Claims (1)

In the press tool (patent application No. 10-2002-0071340) for crimping pipe fittings, a separate steel wire or a safety steel wire ① is formed along the length of the hook plate ⑥ on the outer side of the hook plate ⑥ of the press tool. The safety device of the metal pipe connection press tool, characterized in that the both ends are installed to be fixedly connected to the upper fixing portion ⑧ and the lower fixing portion ⑨ of the hook plate ⑥.