KR101939559B1 - Water and Sewage Pipe Connection Device - Google Patents

Abstract

The present invention relates to an apparatus to connect water supply and sewer pipes of roads, capable of self-centering and improving the hardness of a flange joint by minimizing reduction in a cross-sectional area of a flange. The apparatus includes: a first flange (30) including a first sleeve (31) welded to a first pipe (20); a second flange (40) attached to the first flange (30) with a packing (22) laid therebetween, and including a second sleeve (41) welded to a second pipe (21); clevis parts (32, 33) formed on the outer surface of the first flange (30); a seesaw arm (50) inserted between the clevis parts (32, 33); a pivot pin (70) supporting the seesaw arm (50); a clamp jaw (51) formed at an end of the seesaw arm (50); an arc-shaped groove (52) having a trapezoidal cross section and formed on the clamp jaw (51); a ring-shaped protrusion (43) having a trapezoidal cross section and formed on the outer surface of the second flange (40); a nut part (53) formed at the other end of the seesaw arm (50); a bolt support part (35) formed along a corner part (34) in which the first sleeve (31) and the first flange (30) meet; a semicircular groove (36) formed in the bolt support part (35); a semicircular support body (60) supported by the semicircular groove (36); a combination bolt (55) combined with a tap hole (54); hanging steps (37, 38) formed from the bolt support part (35) toward the outer surface of the first sleeve (31); and a twist prevention step (56) formed in the lower part of the nut part (53).

Description

{Water and Sewage Pipe Connection Device}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road and water pipe connection apparatus, and more particularly, to a road and water connection pipe connection apparatus capable of improving the rigidity of a flange joint by minimizing a reduction in cross-

Recently, sink halls such as road ditches have been frequently encountered in metropolitan streets, and traffic accidents and human casualties caused by sink holes have become social problems. As a result, It is mainly caused by damage of buried water supply and sewerage pipes, and it is mostly occurred at joints of water supply and drainage pipes.

Common large water and sewage pipe joints are constructed by welding a donut-shaped flange to the pipe and pipe ends to be connected, then drilling a number of holes in the flange, inserting the packing between the flange and the flange, there was.

However, the flange used for such general sewer pipe joint has a disadvantage in that the cross-section of the flange is weakened because the hole for fastening the bolt must be punched into the flange. Particularly, because of the gap between the hole punctured in the flange and the bolt, There has been a problem that the center is slightly shifted and the precision construction is difficult.

Korean Patent Registration No. 10-1873862 (Notification Date 2018.07.04.) Korean Patent Registration No. 10-1773392 (Published on Aug. 31, 2017)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a road and water pipe bonding apparatus capable of increasing the rigidity of a flange and performing self-centering.

To accomplish the object of the present invention, there is provided a road and water pipe bending apparatus comprising: a first flange having a first sleeve welded to a first pipe; A second flange having a second sleeve welded to the second pipe, the second flange being in close contact with the first flange with the packing therebetween; A pair of clevis portions radially formed on the outer circumferential surface of the first flange and spaced apart from each other by a predetermined distance; A seesaw arm inserted and supported between the clevis portions; A pivot pin extending through the seesaw arm and the clevis portion to support the seesaw arm; A clamp tank formed at one end of the seesaw arm to press the outer surface of the second flange toward the first flange; An arc-shaped groove having a trapezoidal cross-section formed in the clamp tank so as to be concentric with the center of the first flange; An annular projection formed on an outer surface of the second flange so as to be concentric with a center of the second flange and having a trapezoidal cross section inserted and caught in the arc-shaped groove; A nut portion formed at the other end of the seesaw arm and having a tapped hole; A bolt support portion formed at a predetermined interval in the circumferential direction along a corner portion where the first sleeve and the first flange meet; A half-moon groove formed in the bolt support portion; A half-moon support supported on the half-moon groove; A fastening bolt coupled to the tapped hole and supported by the half-moon support; A pair of engagement protrusions formed toward the outer peripheral surface of the first sleeve from the bolt support portion and spaced apart from each other by a predetermined distance; And a torsion bar formed at the lower end of the nut portion and inserted into the jaws.

The present invention relates to a pivot pin, An eccentric hole formed at the center of the release hole; An eccentric ring closely attached to an end of the pivot pin; An eccentric ring formed to be biased to one side from the center of the eccentric ring and being inserted into the release hole; A pin hole passing through the eccentric ring and the deforming projection and coaxial with the eccentric hole; A guide pin press-fitted into the eccentric hole through the pin hole; A spring seat provided at an end of the guide pin; And a return spring provided between the spring seat and the eccentric ring.

The present invention relates to a semicylindrical body, comprising: a pair of semicircular grooves formed at both ends of a semicylindrical body and concentric with the center of the semicylindrical body; A plate spring installed on the floor between the clevis portions; A semicircular latching part which branches from the leaf spring to both sides and is respectively engaged with the semicircular groove; And a curved surface supporting portion formed on both sides of the half-circular groove so as to be concentric with the center of the half-circular groove and supporting the engaging piece while meeting with the same curved surface as the half-circular groove.

As described above, according to the present invention, by using the fastening bolt 55 coupled to the nut portion 53 of the seesaw arm 50 and the clamping vessel 51 formed on the seesaw arm 50, It is not necessary to drill the through holes in the first flange 30 and the second flange 40 so that the first flange 30 and the second flange 40 40 can be greatly improved.

The arcuate grooves 52 formed in the clamp tank 51 and the annular protrusions 43 formed in the second flange 40 are formed in a trapezoidal cross section and the arcuate grooves 52 and the annular protrusions 43 are formed in the first flange 30 and the second flange 40, self-centering is possible when the arcuate grooves 52 and the annular protrusions 43 are brought into contact with each other, so that the precise construction can be performed quickly and conveniently.

Since the half-drum support body 60 is freely rotated in the half-drum groove 36 formed in the bolt support 35, the half-drum support body 60 maintains a right angle with the fastening bolt 55 when the seesaw arm 50 is rotated And the pressure applied from the fastening bolt 55 can be transmitted to the bolt support portion 35 over an area equal to that of the half-moon support body 60.

The separation and loss of the half-moon support body 60 can be prevented by the engagement pieces 81 and 82 formed in the leaf spring 80 and the half-circular grooves 61 and 62 formed in the half-moon support body 60 .

The ends of the engaging pieces 81 and 82 formed on the leaf spring 80 are bent in an arc shape and the both ends of the half-moon support body 60 and the bolt supporting portion 35 are in close contact with the engaging pieces 81 and 82 Since the semicircular grooves 61 and 62 and the curved surface supporting portions 35a and 35b are formed, the rotation of the semi-circular support body 60 can be smoothly maintained.

When the locating pin 44 is formed on the second flange 40 and the locating hole 39 is formed on the first flange 30, the first flange 30 and the second flange 40 are brought into close contact with each other There is an effect that it is possible to prevent the center from deviating.

It is possible to prevent the pivot pin 70 from being separated from the pivot holes 32h, 33h, and 50h by the eccentric ring 73 provided at the end of the pivot pin 70. [

The rotation of the eccentric ring 73 can be prevented in a state in which the diaphragm protrusion 74 formed on the eccentric ring 73 is inserted into the diaphragm hole 71 formed at the end of the pivot pin 70, So that it is possible to keep the jamming of the apparatus continuously.

It is possible to prevent the release protrusion 74 from being separated from the release hole 71 by the return spring 78 provided between the eccentric ring 73 and the spring seat 77, It is convenient to automatically insert the release protrusion 74 toward the release hole 71 by the return spring 78 when the hand is released.

Since the torsion bar 56 formed at the lower end of the nut portion 53 moves in a state of being inserted between the engaging protrusions 37 and 38 formed on the outer peripheral surface of the first sleeve 31, There is an effect that distortion of the pin 70 can be prevented.

1 is a perspective view
Fig. 2 is a perspective view showing a main part separation perspective view
Fig. 3 is a perspective view of the rear-
4 is a perspective view showing a half-moon support and a leaf spring according to the present invention.
5 is a cross-sectional view
Figure 6 is a cross-sectional view of Figure 5,
7 is a sectional view taken on line A-A '
8 is a sectional view taken along the line B-B '
9 is a perspective view showing a seesaw arm and a pivot pin according to the present invention.
10 is an exploded perspective view showing the peripheral components of the pivot pin and eccentric ring according to the present invention.
11 is a perspective view showing the pivot pin according to the present invention penetrated by the clevis portion and the seesaw arm.
12 is a plan view showing that the eccentric ring is pushed out of the state of Fig. 11 and the releasing projection is separated from the releasing hole. Fig.
13 is a perspective view of Fig. 12
Fig. 14 is an enlarged view showing the rotation of the eccentric ring from the state of Fig. 12
Fig. 15 is a perspective view of Fig. 14,
16 is a partial enlarged plan view showing the eccentric ring according to the present invention being closely attached to the clevis portion by a return spring

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 16, the present invention includes a first flange 30 having a first sleeve 31 welded to a first pipe 20; And a second flange 40 having a second sleeve 41 that is in close contact with the first flange 30 and is welded to the second pipe 21 with the packing 22 therebetween.

The first pipe 20 is inserted into the center of the first sleeve 31 and then the weld bead W3 is inserted into the inner circumferential surface of the first sleeve 31 which meets the end of the first pipe 20, And the weld bead W4 can be formed on the outer circumferential surface of the first pipe 20 that meets the end of the first sleeve 31. [

The weld bead W2 is formed on the inner circumferential surface of the second sleeve 41 which is inserted into the center of the second sleeve 41 and then contacts the end of the second pipe 21, The weld bead W1 can be formed on the outer circumferential surface of the second pipe 21 which meets the end of the second pipe 41. [

The first flange 30 and the first sleeve 31, the second flange 40, and the second sleeve 41 may be formed to have an L-shaped cross section.

An annular packing hook 45 may be formed at the edge of the second flange 40 to prevent the packing 22 from being separated from the flange 40. The protruding height of the packing hook 45 may be greater than the thickness of the packing 22 A slightly small height helps to compress the packing 22.

At least two locate holes 39 are formed in the first flange 30 in order to prevent the center of the flange 40 from shifting when the second flange 40 is brought into close contact with the first flange 30 with the packing 22 interposed therebetween The positioning pin 44 inserted into the locating hole 39 is formed in the second flange 40 and the through hole 23 through which the positioning pin 44 passes is formed in the packing 22 can do.

The present invention comprises a pair of clevis portions (32) (33) radially formed on the outer peripheral surface of the first flange (30) and spaced apart from each other by a predetermined distance; A seesalt arm 50 inserted and supported between the clevis portions 32 and 33; And a pivot pin 70 passing through the seesaw arm 50 and the clevis portions 32 and 33 to support the seesaw arm 50.

The pivot holes 32h, 33h and 50h are formed in the clevis portions 32 and 33 and the seesalt arm 50 so as to be coincident with each other as shown in Figs. 2 and 3, The pivot pin 70 is inserted into the pivot holes 32h, 33h, and 50h with the center of the pivot holes 32h, 33h, and 50h aligned with the centers of the clevis portions 32 and 33 The lower seesaw arm 50 can be rotatably mounted on the clevis portions 32 and 33. [

When a head 79 is formed on the pivot pin 70 and a flat knob 79a is formed on the head 79, the pivot pin 70 is pulled out from the pivot holes 32h, 33h, 70 are inserted into the pivot holes 32h, 33h, 50h, and are handy for handling.

The present invention relates to a clamping apparatus comprising: a clamping vessel (51) formed at one end of a seesaw arm (50) to press an outer surface (42) of a second flange (40) toward a first flange (30); An arc-shaped groove 52 having a trapezoidal cross section formed in the clamp tank 51 so as to be concentric with the center of the first flange 30; And an annular projection 43 formed on the outer surface 42 of the second flange 40 so as to be concentric with the center of the second flange 40 and having a trapezoidal cross section that is caught and inserted in the arc groove 52.

The clamping trough 51 may be integrally formed with the seesaw arm 50 and the arc groove 52 and the annular protrusion 43 may be formed in a plurality of concentric circles as shown in Figs. have.

Since the arc-shaped groove 52 and the annular projection 43 are formed to have a trapezoidal cross section, the adhesion between the arc-shaped groove 52 and the annular projection 43 increases as the annular projection 43 is inserted deeper into the arc- The centers of the first pipe 20 and the second pipe 21 are automatically aligned by self-centering in the process of joining the annular protrusions 43 to the arcuate grooves 52 in the form of wedges.

The present invention is characterized by comprising a nut portion (53) formed at the other end of the seesaw arm (50) and having a tapped hole (54); A bolt support portion 35 formed at a predetermined interval in the circumferential direction along the corner portion 34 where the first sleeve 31 and the first flange 30 meet; A half-circular groove 36 formed in the bolt support 35; And a half-moon support body (60) supported by the half-moon groove (36).

The nut portion 53 may be formed integrally with the seesaw arm 50. The nut portion 53 may be formed to protrude in a circular arc shape in order to reinforce the reduced cross section due to the tapped hole 54 formed at the center. can do.

The bolt support 35 may be formed to have a substantially right-angled triangular cross section as shown in FIG. 7, and a half-moon groove 36 may be formed on the inclined surface of the bolt support 35 to rotate the half- .

The half-moon support body 60 is rotated such that the fastening bolt 55 is perpendicular to the contact surface of the half-moon support body 60 and the end portion of the fastening bolt 55 keeps the surface contact state with the half- .

When lubricating oil or grease is applied to the contact surfaces of the half-moon groove 36 and the half-moon support 60, the motion of the half-moon support 60 can be made more smooth and lighter.

The present invention is characterized by a fastening bolt (55) coupled to the tapped hole (54) and supported on the half-moon support (60); A pair of engaging protrusions 37 and 38 formed toward the outer circumferential surface of the first sleeve 31 from the bolt support 35 and spaced apart from each other; And a torsion bar 56 formed at the lower end of the nut portion 53 and inserted between the engaging jaws 37 and 38.

The stopping jaws 37 and 38 can be integrally formed at the corner portion formed by the bolt supporting portion 35 and the first sleeve 31. The torsion restricting jaws 56 can be integrally formed with the stopping jaws 37 and 38 Which acts to restrain the seesome arm 50 from moving laterally when inserted and to reduce the load that can be concentrated on the pivot pin 70.

The engagement protrusions 37 and 38 and the torsion bar 56 prevent twisting of the seesaw arm 50 and help precise centering of the first pipe 20 and the second pipe 21.

The present invention is characterized in that the pivot pin (70) has an opening (71) formed to be biased to one side from the center of the end of the pivot pin (70); An eccentric hole 72 formed at the center of the release hole 71; An eccentric ring 73 which is in close contact with an end of the pivot pin 70; An exclamation protrusion 74 formed to be biased to one side from the center of the eccentric ring 73 and inserted into the release hole 71; And a pin hole 75 passing through the eccentric ring 73 and the deforming protrusion 74 and coaxial with the eccentric hole 72.

As shown in FIGS. 10 and 13, the release holes 71 and the release protrusions 74 may be formed to have a regular hexagonal cross section. However, the release holes 71 and the release protrusions 74 are not limited to these specific shapes. For example, Sectional or symmetrical cross-section.

The eccentric ring 73 is formed so as to be eccentric from the center of the pivot pin 70 and coincident with the center of the release hole 71. The eccentric ring 73 has an outer diameter equal to or smaller than the outer diameter of the pivot pin 70 And prevents the eccentric ring 73 from interfering with the pivot holes 32h, 33h and 50h when the pivot pin 70 is inserted into the pivot holes 32h, 33h and 50h.

It is possible to form an annular groove 73g on the outer circumferential surface of the eccentric ring 73 to which a fingertip can be attached to prevent slipping when the eccentric ring 73 is pulled.

The present invention comprises a guide pin (76) press-fitted into an eccentric hole (72) through a pin hole (75); A spring seat 77 provided at an end of the guide pin 76; And a return spring 78 provided between the spring seat 77 and the eccentric ring 73.

8, when a few drops of the instant adhesive or the anaerobic adhesive are injected into the eccentric hole 72 before the guide pin 76 is press-fitted into the eccentric hole 72, the guide pin 76 is retracted from the eccentric hole 72 Separation can be prevented.

The guide pin 76 is inserted into a pinhole 77h formed at the center of the spring seat 77 as shown in Fig. 10 and guided by the guide pin 76 The spring seat 77 is engaged with the pin head 76a.

The return spring 78 may be constituted by, for example, a compression coil spring formed by spirally winding a spring steel wire, and the return spring 78 may be formed by continuously rotating the eccentric ring 73 toward the end of the pivot pin 70 .

The present invention is characterized in that it comprises a pair of semicircular grooves (61) (62) formed at both ends of a semicircular support (60) and concentric with the center of the semicircular support (60); And a leaf spring 80 provided at the bottom between the clevis portions 32 and 33. [

The plate spring 80 can be formed by press working using a spring steel plate having a constant thickness. As shown in Figs. 4 and 7, the plate spring 80 has a fastening hole 84 formed at the center of the upper surface of the plate spring 80, A rivet hole 30h whose center is coincident with the center is formed on the bottom surface between the clevis portions 32 and 33 to press the rivet 83 into the rivet hole 30h through the fastening hole 84, 80) can be installed.

The present invention comprises semicircular latching pieces 81 and 82 branched on both sides from the leaf spring 80 and engaged with the semicircular grooves 61 and 62, respectively; The curved surface supporting portions 35a and 35b which are formed on both sides of the half-circular groove 36 so as to be concentric with the center of the half-circular groove 36 and which support the engaging pieces 81 and 82 while meeting with the same curved surface as the semicircular grooves 61 and 62 ) 35b.

One end of the leaf spring 80 may be bent downward and then the latching pieces 81 and 82 may be formed on both sides of the lower end.

The end portions of the engaging pieces 81 and 82 are bent in an arcuate shape so as to be brought into close contact with the semicircular grooves 61 and 62 and the curved surface supporting portions 35a and 35b, The retaining members 81 and 82 are elastically deformed to provide a preload capable of constantly bringing the semi-moon support 60 into close contact with the half-moon groove 36.

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 16, in the state where the center of the positioning pin 44 formed on the second flange 40 is aligned with the through hole 23 formed in the packing 22, The positioning pin 44 protrudes in the opposite direction through the through hole 23 and the centers of the packing 22 and the second flange 40 coincide with each other.

The center of the positioning pin 44 passing through the packing 22 is aligned with the center of the locating hole 39 formed in the first flange 30 and the second flange 40 is fitted to the center of the positioning flange 30 The first flange 30 and the second flange 40 are brought into close contact with each other with the packing 22 interposed therebetween.

2 and 3, after the seesaw arm 50 is inserted into the clevis portions 32 and 33, the clevis portions 32 and 33 and the pivot holes formed in the seesaw arm 50 When the pivot pin 70 is inserted into the pivot holes 32h, 33h and 50h in a state where the centers of the pivot pins 32h, 33h and 50h are aligned with each other, And is rotatably assembled to the clevis portion 32 (33).

As shown in FIG. 4, the half-moon support body 60 is brought into close contact with the half-moon groove 36 formed in the bolt support portion 35 and then the engagement pieces 81 and 82 formed on the leaf spring 80 are engaged with the half- And the curved surface supporting portions 35a and 35b formed on the bolt supporting portion 35 are brought into tight contact with the semicircular grooves 61 and 62 formed in the clevis portion 32 33, it is possible to prevent deviation of the half-moon support body 60 from being released.

If the assembly of such a half-moon support body 60 and the leaf spring 80 is performed in advance in the production factory, the process in the field is reduced, which is helpful for quick construction.

The annular protrusion 43 formed on the second flange 40 is assembled so as to engage with the arcuate groove 52 formed in the clamp tank 51 when the seesaw arm 50 is inserted into the clevis portions 32 and 33, The torsion bar 56 formed on the nut portion 53 is inserted between the engaging jaws 37 and 38. [

The pivot pin 70 is inserted into the pivot holes 32h, 33h and 50h and then the eccentric ring 73 is pulled out as shown in Figs. 12 and 13 to prevent the pivot pin 70 from coming off. When the projection 74 is separated from the release hole 71, the return spring 78 is compressed.

14 and 15, when the eccentric ring 73 is rotated, the eccentric ring 73 is rotated about the guide pin 76, and the pivot pin 70 and the clevis portion 33 are rotated on both sides .

The rotation angle of the eccentric ring 73 can be rotated by 30 degrees, 60 degrees, 120 degrees, 180 degrees when the release projections 74 and the release holes 71 are formed in a regular hexagonal cross section, An example in which the eccentric ring 73 is rotated 180 degrees is shown.

16, when the eccentric ring 73 is pulled out of the clevis portion 33 and the pivot pin 70 by the resilient restoring force of the return spring 78, The releasing protrusion 74 is inserted into the releasing hole 71 while moving toward the end.

When the release protrusion 74 is inserted into the release hole 71 as described above, the rotation of the eccentric ring 73 can be prevented, and the rotation of the eccentric ring 73 prevents the release of the pivot pin 70 .

When the fastening bolt 55 coupled to the tapped hole 54 of the nut portion 53 is turned to advance toward the half-moon support body 60 in order to tightly contact the first flange 30 and the second flange 40, The seesalt arm 50 and the clamp tank 51 are rotated by the reaction force when the end of the bolt 55 contacts the half-moon support body 60 and the second flange 40 is moved toward the first flange 30 .

At this time, the half-moon support body 60 rotates in the half-moon groove 36 to maintain a right angle with the fastening bolt 55, and the arc-shaped groove 52 and the annular projection 43 having a trapezoidal cross- The pipe 20 and the second pipe 21 are self-centered.

In this case, the torsion bracket 56 formed at the lower end of the nut portion 53 may receive a force in the torsion direction when the pivot pin 70 and the seesaw arm 50 are strongly twisted in the process of tightening the fastening bolt 55. [ The torsion bar 56 and the stopping jaws 37 and 38 share and support the unsprung portion of the torsion bar 50 and the pivot pin 70 by the torsion bar 37 and the torsion bar 38 do.

20: first pipe 21: second pipe
22: packing 23: through hole
30: first flange 30h: rivet hole
31: first sleeve 32, 33: clevis portion
32h, 33h, 50h: pivot hole 34: corner portion
35: bolt support portions 35a, 35b: curved surface support portions
36: half-moon groove 37, 38:
39: Locate hole 40: Second flange
41: second sleeve 42: outer side
43: annular projection 44: positioning pin
45: Sealing jaw 50: Seesaw arm
51: clamp assembly 52: arched groove
53: nut portion 54: tapped hole
55: fastening bolt 56: torsion bar
60: Semi-flat support 61, 62: Semicircular groove
70: Pivot pin 71: Release hole
72: eccentric hole 73: eccentric ring
73g: annular groove 74: deformed projection
75: pin hole 76: guide pin
76a: pin head 77: spring seat
77h: pin hole 78: return spring
79: Tofu 79a: Handle
80: leaf spring 81, 82:
83: rivet 84: fastening hole
W1, W2, W3, W4: weld bead

Claims (3)

A first flange (30) having a first sleeve (31) welded to a first pipe (20);
A second flange (40) having a second sleeve (41) which is in close contact with the first flange (30) with the packing (22) therebetween and welded to the second pipe (21);
A pair of clevis portions (32) (33) radially formed on the outer peripheral surface of the first flange (30) and spaced apart from each other;
A seesalt arm 50 inserted and supported between the clevis portions 32 and 33;
A pivot pin (70) passing through the seesaw arm (50) and the clevis portions (32) (33) to support the seesaw arm (50);
A clamping tank 51 formed at one end of the seesalt 50 to press the outer surface 42 of the second flange 40 toward the first flange 30;
An arc-shaped groove 52 having a trapezoidal cross section formed in the clamping jig 51 so as to be concentric with the center of the first flange 30;
An annular projection 43 formed on the outer side surface 42 of the second flange 40 so as to be concentric with the center of the second flange 40 and having a trapezoidal cross section inserted and caught in the arc-shaped groove 52;
A nut portion 53 formed at the other end of the seesal arm 50 and having a tapped hole 54;
A bolt support portion 35 formed at a predetermined interval in the circumferential direction along the corner portion 34 where the first sleeve 31 and the first flange 30 meet;
A half-moon groove 36 formed in the bolt support 35;
A half-drum support body 60 supported by the half-drum groove 36;
A fastening bolt 55 coupled to the tapped hole 54 and supported by the half-moon support 60;
A pair of latching protrusions 37 and 38 formed to extend from the bolt support 35 toward the outer circumferential surface of the first sleeve 31 and spaced apart from each other;
A torsion bar 56 formed at a lower end of the nut portion 53 and inserted between the engaging jaws 37 and 38;
And a pipe connecting portion for connecting the pipe to the pipe. The method according to claim 1,
An annular hole 71 formed at one end of the center of the end of the pivot pin 70;
An eccentric hole (72) formed at the center of the release hole (71);
An eccentric ring (73) attached to an end of the pivot pin (70);
An eccentric ring (73) formed in one side of the eccentric ring (73);
A pin hole (75) passing through the eccentric ring (73) and the releasing protrusion (74) and centered with the eccentric hole (72);
A guide pin 76 press-fitted into the eccentric hole 72 through the pin hole 75;
A spring seat 77 provided at an end of the guide pin 76;
A return spring 78 installed between the spring seat 77 and the eccentric ring 73;
And a pipe connecting portion for connecting the pipe to the pipe. The method according to claim 1,
A pair of semicircular grooves (61) (62) formed at both ends of the semicircular support (60) and concentric with the center of the semicircular support (60);
A leaf spring 80 installed at the bottom between the clevis portions 32 and 33;
Semicircular latching pieces 81 and 82 branched on both sides from the leaf spring 80 and engaged with the semicircular grooves 61 and 62, respectively;
And is formed on both sides of the half-circular groove 36 so as to be concentric with the center of the half-circular groove 36 and supports the retaining pieces 81 and 82 while meeting with the same curved surface as the half- Curved surface supporting portions 35a and 35b;
And a pipe connecting portion for connecting the pipe to the pipe.

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