KR19990037601A - Crimped Metal Pipe Connection Tool - Google Patents

Abstract

The present invention is a fastening portion of the crimping metal fittings 33 for simultaneously mounting the metal ring 36 and the packing ring 35 adjacent to the fastening portion 34 of the four pressing dice (3) capable of individual movement. The present invention relates to a crimped metal pipe connecting tool for pressing and fitting a pipe fitting (33) to a pipe (37) by pressing (34). This was heavy, the layout of the coil spring (S) was not appropriate, and there were many defects in construction and economical and workability was also poor.

Therefore, the applicant directly connects the jaw (1) and the lower jaw frame (7) in a manner in which the jaws (J) are opposed to each other in a manner in which they face each other and improve the arrangement and orientation of the elastic body (4) such as a coil spring. We are applying for a new crimped metal tube connecting tool that solves the problems of tool economy, workability and construction.

Description

Crimped Metal Pipe Connection Tool

The present invention is a crimping type equipped with four pressing dies 3 for fastening and connecting the crimping fitting 33 in which the metal ring 36 and the packing ring 35 are inserted into the fastening portion 34. A metal pipe connecting tool.

The conventional connection tool for the present application has a structure in which left and right jaws (J) each having two pressing dies 3 mounted on the two sliding surfaces 16 approach and press each other in a rotational motion. Among the dice 3 on the upper jaw J, the gap between the dies 3 at a position far from the center of rotation of each jaw is greater than the gap between the dice 3 at a position closer to the closest position from the beginning of the crimping operation, and the crimping is performed. During operation, the relative angle of the left and right jaws (J) is constantly changing, so that the shaft diameter of the fastening portion 34 is not smooth, and the outer circumference of the crimping fastening portion 34 is partially spaced between the dies 3. Protruded to cause water leakage, and an elastic body 4 which maintains its position before the crimping operation on the sliding surface 16 of each die 3 is installed between the dice 3 in the same jaw. The direction of elasticity is not the same as the sliding direction of the die 3, and crosses each other. Switch (3) by the frictional force generated between the sliding surface 16, there has been a sliding operation of the tool and let leak accident preventing wonhwalchi of the die (3). In addition, the left and right jaw crimping structure becomes a cantilever shape of one end support on the rotating shaft, and the jaw body receives a large bending moment to secure the required cross-sectional coefficient. The weight of the jaw becomes very heavy, and thus there has been a problem of increase in manufacturing cost and deterioration of workability in use.

Accordingly, the present applicant is filed here with a new crimping metal tube connecting tool for solving these problems.

First, the main application connecting tool is the four pressing dies (3). The forward and backward movements of the lower jaw (2) are carried out with the jaw (1), the lower jaw (2), and the lower jaw (2) mounted therein forming two sliding surfaces 16, respectively. The main parts such as the guide and the lower frame (7) connected to the power source textbooks such as hydraulic cylinders, and the fixing pin (8) or two fixing pins (8) and one lock arm (25) It consists of four elastic bodies (4) for maintaining the position of the die (3), and auxiliary parts such as a die holder (5) for preventing side breakage of the die (3), and the jaw (1) and the lower jaw (2) are mutually It is a structure that is approached and squeezed by the opposite movement in the opposite direction of 180 °, and the dice (3) is an elastic body (4) that applies independent elasticity in the same direction as the sliding direction (1) (2). ) And the simple beam where both the jaw (1) and the lower jaw frame (7) are supported by two fixing pins (8) during the crimping operation. (SIMPLEBEAM) type of structure, which receives the bending moment smaller than the conventional tools, so that the weight can be reduced, eventually leaking problems, problems of the tool, high manufacturing cost and uncomfortable workability problems in the conventional connecting tool To solve them.

Now look at an example of the crimping operation of the main connection tool,

First, the fastening part 34 of the pipe fitting 33 is inserted into the connecting tool, and the lower jaw 2 is lowered in the lower jaw 7 by a hydraulic action such as hydraulic pressure. When approaching straight toward each other, the two dies 3 on the different jaws (1) and 2 are in contact with each other, and the two dies 3 in the same jaws are also in contact with each other or both of the stop faces 32. The fastening portion 34 of the 33 is completely shaft-compressed, and the pipe 37 and the pipe fitting 33 are completely connected.

In addition, it is convenient to use a hydraulic cylinder, a hydraulic pump, an electric motor, and a power cord in combination with the main application connecting tool as a system assembly tool.

In addition, when the lock arm 25 is used, the torsion coil spring 24 may be installed on the fixing pin 8 to secure the locking jaws 26 and 27.

No identifier above

1 is an assembly view of a partially cross-sectional connection tool

2 is a cross-sectional view taken along the line A-A 'of FIG.

3 is a cross-sectional view taken along line D-D 'of FIG.

4 is a front view of a partially cross-sectioned upper jaw

5 is a cross-sectional view taken along line B-B 'of FIG.

6 is a front view of a partially cross-sectioned lower

7 is a cross-sectional view taken along line C-C 'of FIG.

8 is a side view of a partially cut crimping die

9 is a cross-sectional view taken along line E-E 'of FIG.

10 is a torsion coil spring

11 is an assembly view of the lockarm open / closed connection tool

12 is a combination diagram of a system assembly type connecting tool

13 is a connection structure diagram of the pipe and fittings

14 is a connection tool of a conventional rotary crimping structure.

-Code description of main parts of drawing-

1: Upper JAW 2: Lower JAW

3: DIES 4: elastic body

5: DIES HOLDER 7: Lower jaw frame (FRAME)

8: Pin (PIN) 11: Key

12: pressing surface 14: KEY WAY

16: sliding surface 21: Piston Rod (PISTON ROD)

24: torsion coil spring 25: lock arm

26.27: Hanging jaw 28: Hydraulic cylinder (油壓 CYLINDER)

29: hydraulic pump 30: electric motor

32: stop face 33: pipe fitting

34: fastening part 35: packing ring

36: metal ring 37: pipe

J: Jaw of conventional connecting tool

H: Center hinge of connecting tool (HINGE)

D: Die of conventional connecting tool

S: Coil spring for maintaining the die position of conventional connecting tools

No identifier above

No identifier above

Claims (1)

The fastening portion 34 of the crimp pipe fitting 33 which simultaneously attaches the metal ring 36 and the packing ring 35 to the fastening portion 34 simultaneously with each other is axially mounted in the pipe 37 inserted therein. In the crimped metal pipe connecting tool mounted with four dice 3 for crimping at right angles and fastening and connecting the pipe 37 and the pipe fitting 33 to each other, It is contacted with the outer periphery of the pipe fitting part 34, and the fastening part 34 is crimped | bonded, and the two grooves of the same shape and a dimension in the axial cross section are pressed. Four pressing dies 3 having a concave groove-shaped crimping surface 12 formed of a circular arc having a quarter length in the axially perpendicular direction toward the center of the pipe 37. ), Each sliding surface of the lower jaw (1) and lower jaw (2) forming two sliding surfaces (16), each of which forms a piers of 90 ° or less, toward the center of the tube (37). Each die (3) is mounted on (16) so as to be in contact with the sliding surface (16) to enable independent sliding, and between each die (3) and the jaws (1) (2) to which it is mounted, The direction of action is the same as the sliding operation direction of the die 3 and in a direction to move the die 3 away from the stop surface 32 of the jaws 1 and 2 to which it is mounted. An elastic body 4, such as a coil spring, is provided to apply the elasticity to each die 3 independently, and the hurt jaw 1 is also provided with two fixing pins 8 or two fixing pins 8 and aper. The jaw (1) and the lower jaw (1) and the lower jaw (2) are connected to the lower jaw frame (7) by assembling and connecting the lower jaw frame (7) directly with one lock arm (25) connected to each other. The fitting fastening part 34 is disposed to face each other with the fitting fastening part 34 interposed therebetween, and the fastening part 34 is crimped by moving from the opposite direction in a straight line, and stopped by the elastic body 4 before the crimping operation. Four dies 3 which were in contact with the outer circumference of the fastening portion 34 while being mounted on the sliding surfaces 16 at predetermined intervals from the surface 32 were respectively mounted on the sliding surfaces 16 as the pressing operation proceeded. Along the stop surface 32 to move the fastening shaft 34 to the compression shaft 34, each two dies mounted on different jaws (1) (2) When (3) is in contact with each other and each of the two dice (3) in the same jaw also in contact with each other or all of the stop surface 32, the crimping is finished and the connection between the pipe 37 and the pipe fitting 33 is completed. Crimping metal pipe connecting tool.