KR101974554B1 - Anti-loosening clamp device - Google Patents

Abstract

The present invention relates to a clamp device having an anti-loosening function. More specifically, the clamp device having the anti-loosening function includes: a first clamp unit in the shape of a semicircle, having a flange coupling groove on the inner circumference; a second clamp unit in the shape of the semicircle, having the flange coupling groove on the inner circumference, wherein one end of the second clamp unit is connected to one end of the first clamp unit to rotate and an insertion groove is formed on the other end; a bolt member having a latch gear unit on the outer circumference on one end, wherein a thread for interval control is formed by being extended on the outer circumference on the one end and the other end is connected to the other end of the first clamp unit to rotate by a hinge; and a nut member controlling intervals of the first and second clamp units by screw connection with the bolt member, wherein one side of the nut member is inserted into the insertion groove to couple the first clamp unit and the second clamp unit to each other. Specifically, an anti-loosing unit is installed on the inner side of a cutting hole of the nut member. So, the clamp device having the anti-loosening function can stably maintain a sealing state of a pipe by fundamentally preventing the anti-loosening unit from being released due to carelessness of a worker.

Description

[0001] The present invention relates to a clamp device having an anti-loosening function,

The present invention relates to a clamping device having a loosening preventing function, more particularly, to provide a loosening preventing means inside a nut member to prevent a clamping device from being loosened by carelessness of a worker, To a clamping device having an anti-loosening function.

BACKGROUND ART [0002] Generally, vacuum piping lines are provided in semiconductor manufacturing facilities or the like to maintain a vacuum state, and piping connection clamps are used for connecting vacuum piping lines to each other so as to communicate with each other.

Such a pipe connection clamp is usually constructed such that a pair of semicircular clamp units are fastened to each other by a screw connection between a bolt member and a nut member. Since vibration due to the operation of the vacuum pump is continuously transmitted to the clamp along the vacuum pipe line The tightening state between the bolt member and the nut member is easily released, and the function of the clamp is lost, so that the airtight state of the vacuum pipe can not be maintained.

Patent Document 1 discloses a piping connection clamp in which a first clamp member and a second clamp member each formed in a semicircular shape and hinged to each other, a fastening bolt hinged to the first clamp member so as to be pivotable, And a loosening preventing cover which is rotatably coupled to the second clamping member. The locking nut is fixed by assembling the stopper of the loosening preventing cover and the loosening preventing groove of the locking nut, Clamp is started.

Patent Document 2 discloses a scroll fluid machine including a first rotating member and a second rotating member hinged to each other, a fastening bolt provided on the first rotating member, a nut coupled with the fastening bolt, And a rotation knob fixed to both ends of the connection portion, wherein rotation of the nut is prevented when the rotation knob provided on the side of the first rotation member is rotated.

Patent Document 3 discloses a hinge-type clamp in which a spring-ball unit is provided in a nut, and when the nut is completely fastened to the bolt, the ball resiliently enters the locking groove of the bolt and is locked.

Although there are various means for implementing the clamp release preventing function as described above, there is a weak point that the lock is unintentionally released due to the structure of the knob for switching the lock / unlock and the positional external shock or carelessness in handling the operator.

In the case of a technique in which a spring-ball unit is provided in a nut, since the spring-ball unit is biased to one side of the bolt by a biasing force, not only the efficient fixation is performed but also a strong external force is applied to the nut in the reverse direction The ball can easily be unlocked out of the lock groove and there is a risk that the thread of the bolt may be damaged by the ball.

In order to solve such a problem, Patent Document 4 discloses a clamping device having a structure in which a release and release function can be implemented with a convenient and simple structure and can not be easily unlocked by an external shock or carelessness of an operator.

1 and 2 are views showing the construction of a clamping device according to this conventional patent document 4. Referring to the drawings, a stopper 130 for preventing loosening is provided on the upper surface of a nut member 120 The stopper 130 is prevented from being loosened by the external vibration for a long period of time. However, since the stopper 130 for preventing loosening is installed on the outer surface of the nut, And the stopper 130 for preventing loosening is exposed to the outside, which is not preferable for appearance.

In addition, when the clamping device is unscrewed from the piping, it is troublesome for the operator to pick up and rotate the stopper for preventing loosening 130 manually.

Accordingly, there is an increasing demand for a clamping device capable of overcoming the unreasonable points of such conventional clamping devices, providing a more reliable loosening prevention function, and releasing the clamping device from the piping easily when unlocked, thereby improving workability It is true.

Patent Document 1: Korean Published Patent Application No. 2009-0020126 Patent Document 2: Korean Patent Publication No. 10-1200719 Patent Document 3: Korean Utility Model Publication No. 2013-0006222 Patent Document 4: Korean Utility Model Publication No. 2017-0001272

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide an apparatus and a method for preventing unfastening of a clamping device due to carelessness of a worker, So that the unlocking function can be reliably performed.

Another object of the present invention is to simplify the release function of the nut member when the clamping device is released for operation such as valve replacement.

According to an aspect of the present invention, there is provided a clamp unit comprising a first clamp unit having a flange fastening groove formed on an inner circumferential surface thereof, a first clamp unit hinged to one end of the first clamp unit so as to be rotatable, A second clamp unit having a flange fastening groove formed on an inner circumferential surface thereof, one end of the second clamp unit being hingedly coupled to the other end of the first clamp unit so as to be rotatable, A bolt member having a latch gear portion formed on the outer circumferential surface on the other end side thereof, a coupling hole through which the bolt member is inserted and screwed on one side thereof along the longitudinal direction, And a nut which is inserted into the fitting groove on one side to fasten the first clamp unit and the second clamp unit to each other, Wherein the nut member has a cutout hole formed at one side of the outer surface of the nut member so as to communicate with the engagement hole and is rotatably and axially coupled to the cutout hole so as to be inserted into the engagement hole, And a loosening preventing portion for preventing the nut member from being rotated in the reverse direction while being selectively engaged with the latching portion.

In this case, the unlocking portion is formed with a shaft hole that is rotatably coupled to the inside of the cutout hole at the center portion thereof, and one end portion thereof is formed with a latching portion projecting inward from the coupling hole and engaged with the gear piece of the latch gear portion, A stopper body having a sliding protrusion protruding from a side surface thereof, a sliding groove inclined outwardly upwardly from a surface opposite to the engaging piece, and a protruding surface partially exposed to the outside of the incision hole, And a first ball plunger provided inside the cut-out hole and partially protruding upward due to elasticity and fixed in close contact with the sliding groove, wherein the first ball plunger is protruded upward by elasticity, One end of the stopper body is pushed to the inside of the engaging hole while the end of the stopper body slides on the sliding groove, The engaging piece is engaged with the gear piece of the latch gear part when the nut member is rotated in the reverse direction, The one end of the stopper body is pushed outside the engaging hole so that the rotation preventing protrusion contacts the side wall surface of the cut-off hole to restrict the turning radius of the stopper body.

Wherein the protruding surface protrudes outside the cut-out hole to a height of 1 mm or less.

In addition, the outer shape of the nut member in which the cut-out hole is formed is formed to have a polygonal cross-sectional structure, a fixing hole having a shape corresponding to the polygonal cross-sectional structure of the nut member is formed on the inner side, The protruding surface of the stopper body is slid along the inclined surface and is moved to the inside of the cut-out hole, and the stopper body is protruded from the protruding surface of the protruding body, The engaging piece is engaged with the gear piece of the latch gear part while being rotated in the direction in which the surface is moved.

Further, the nut member may have a cylindrical shape and a coupling hole may be formed on the inner side of the coupling hole in the longitudinal direction. The coupling body may have a first body formed with threads for screwing with the bolt member, A second body formed integrally with the second body so as to extend through the first body and the second body so that the first body and the second body are connected to each other, And a third body having a cutting hole communicating with the coupling hole on one side of the outer surface.

A spring inserted into the mounting hole; and an elastic pressing body having one end thereof in close contact with the spring in a plate shape and the other end in a hemispherical shape and protruding at a certain portion from the inside of the mounting hole in the mounting hole. 2 ball plunger.

Further, the present invention further includes a grip ring having a ring-shaped outer surface formed with a non-slip protrusion, so that the nut member is inserted into the inside of the grip ring so that the inner edge of the grip ring is embedded in the outer edge of the second body.

According to the present invention as described above, the loosening preventing means for preventing the nut member from rotating in the reverse direction is provided so that the fastening state of the clamping device tightened to the pipe is not loosened even if the clamping device is exposed to the external vibration for a long time, The nut member can be installed inside the incision hole so that the unlocking means is prevented from being released due to carelessness of the worker, thereby stably maintaining the airtightness of the pipe.

In addition, the function of the loosening preventing means can be released only by inserting the fastening socket into the nut member, so that the disassembling operation of the clamping device is very easy and the working efficiency can be improved.

Figs. 1 and 2 are views showing the construction of the clamping device of this conventional patent document 4. Fig.
FIG. 3 is a perspective view of a clamp device having a release preventing function according to the present invention coupled to a pipe.
FIG. 4 is a perspective view of a clamp device having a release preventing function according to the present invention.
FIG. 5 is a side view of a clamping device having a release preventing function according to the present invention.
6 is a perspective view of the bolt member and the nut member according to the present invention separated from each other.
7 is an exploded perspective view illustrating a state in which the nut member according to the present invention is disassembled.
8 is a sectional view of a nut member according to the present invention.
9 is a view showing a cross-sectional structure taken along line A-A 'in Fig.
10 is a cross-sectional view taken along the line B-B 'in FIG.
11 is a view showing a structure in which a fastening socket for releasing the function of the unlocking portion according to the present invention is coupled.
12 is a view showing a state in which the function of the unlocking portion is released by inserting the fastening socket according to the present invention.
FIG. 13 is a view schematically showing a procedure of clamping a pipe using a clamping device having a release preventing function according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a perspective view of a clamp device having a release preventing function according to the present invention coupled to a pipe, FIG. 4 is a perspective view of a clamp device having a release preventing function according to the present invention, FIG. 6 is a perspective view showing a state in which the bolt member and the nut member are separated from each other according to the present invention, and FIG. 7 is a perspective view showing a state in which the nut member according to the present invention is disassembled FIG. 8 is a sectional view of a nut member according to the present invention, and FIG. 9 is a sectional view taken along line A-A 'of FIG. 5. Referring to FIG.

Referring to the drawings, a clamping device having a release preventing function according to the present invention is installed inside a first and second clamp units 10 and 20, a bolt member 30, a nut member 40 and a nut member 40 (50).

The first clamp unit 10 and the second clamp unit 20 are each provided with a semicircular body having flange engagement grooves 11 and 21 corresponding to flange portions of the pipe on the inner circumferential surface thereof, And one end of the second clamp unit 20 are hinged to each other via a first hinge engaging part 12 composed of a hinge pin 12a and a connecting piece 12b. The first and second clamp units 10 and 20 are coupled in a combined state by forming a circular clamp body so as to cover the outer circumferential surface of the cylindrical pipe.

In the other end of the second clamp unit 20, a fitting groove 22 having a curved surface corresponding to the outer shape of the nut member is formed so that one side of the nut member 40 is inserted. A fixing jaw 23 is formed to be in close contact with one end of the nut member 40. [

The bolt member 30 has a second hinge engaging portion 30a which is rotatably hinged to the other end of the first clamp unit 10 at one end and a spacing adjusting thread 31 And a ratchet gear portion 32 formed of a gear piece 32a protruding at regular intervals along the outer edge is formed on the outer peripheral surface on the other end side. The bolt member 30 is inserted into the fitting groove 22 by pivoting to the second clamp unit 20 via the second hinge engaging portion 30a.

The nut member 40 is provided at one side with a coupling hole 41 through which the bolt member 30 is inserted and screwed in the longitudinal direction and is screwed with the bolt member 30 to connect the first and second clamp units 10 and 20 are adjusted. That is, the bolt member 30 is rotated and inserted into the fitting groove 22 in a state where the bolt member 30 is integrally fixed to the coupling hole 41 of the nut member 40 to a certain depth, So that the nut member 40 is clamped.

The nut member 40 is cylindrical in shape and has a coupling hole 41 formed on the other side along the longitudinal direction. The coupling hole 41 is formed with threads for screwing the bolt member 30, A first body 40a inserted into the fitting groove 22 and a coupling hole 41 of the first body 40a formed integrally with the other end of the first body 40a are communicated with each other, A second body 40b in which an installation hole 40b-1 penetrating through the coupling hole 41 is formed at a predetermined interval along the outer edge, and a second body 40b formed integrally with the other end of the second body 40b, A third body 40c having an outer surface formed in a polygonal shape and having a cutout hole 42 penetrating through a coupling hole 41 at one side of the outer surface and having an anti- .

A second ball plunger 70 protruding inward from the coupling hole 41 is provided inside the nut member 40 so as to be resiliently fixed to the ratchet member 32 of the bolt member 30, (30) can be restrained in rotation at regular intervals.

The second ball plunger 70 includes a spring 72 inserted into the installation hole 40b-1 and a spring 72 having one end in close contact with the spring 72 in the form of a plate 71b and the other end in a hemispherical shape 71a And an elastic pressing body 71 protruding at a certain portion from the inside of the fitting hole 41 in the mounting hole 40b-1. Since the elastic pressing body 71 is not formed in the shape of a ball, even when the elastic pressing body 71 is continuously rotated, the elastic pressing body 71 can provide sufficient elastic pressure to the ratchet unit 32 side of the bolt member 30 so that it can be elastically fixed. It is possible to sufficiently perform the clutch function even during the rotation of the motor 40.

In addition, according to the present invention, it is possible to prevent the second ball plunger 70 from being detached from the installation hole 40b-1, to make the ball plunger look neat without being exposed to the outside, and to rotate the nut member 40 The nut member 40 is further provided with a grip ring 80 capable of serving as a handle.

Such a grip ring 80 is ring-shaped and has non-slip projections formed continuously on the outer surface thereof and has an inner diameter corresponding to or smaller than that of the second body 40b, so that one end of the first body 40a is connected to the grip ring 80 so that the inner edge of the holding ring 80 is pressed against the outer edge of the second body 40b to cover the mounting hole 40b-1 from the outside.

The unlocking portion 50 is rotatably and axially coupled to the inside of the cutting hole 42 so that one end of the unlocking portion 50 is rotated while being selectively engaged with the gear piece 32a of the ratchet gear portion 32, As shown in Fig.

The release preventing portion 50 includes a stopper body 51 and a first ball plunger 52 that are rotatably coupled to the inner cutout hole 42 of the nut member 40.

A shaft hole 51a is formed in the center of the stopper body 51 for axial engagement within the cut hole 42 of the nut member 40 and a through hole 51a communicating with the shaft hole 51a is formed on the nut member 40. [ The fixing pin 53 is continuously inserted.

A stopper body 51 is formed at one end of the stopper body 51. The stopper body 51 is rotated about the shaft hole 51a and selectively protrudes to the inside of the coupling hole 41, The rotation preventing protrusion 51c is protruded to selectively contact the sidewall surface 42a of the cutout portion in accordance with the rotation direction of the nut member 40 so that the turning radius of the nut member 40 can be limited.

At the one end side of the stopper body 51 opposed to the engaging piece 51b, a sliding groove 51d which is inclined upward outward is formed.

At the other end of the stopper body 51, a stopper body 51 is pivoted about the shaft hole 51a, and a protruding surface 51e is formed which is selectively exposed to the outside of the cutoff hole 42 at a certain position. It is preferable that the projecting surface 51e is formed as a curved surface.

The first ball plunger 52 is disposed on the inner side of the cutout hole 42 and is disposed below the sliding groove 51d of the stopper body 51 so that the upper end portion of the first ball plunger 52 is tightly fixed on the sliding groove 51d by elasticity . The first ball plunger 52 is generally provided with a spring 52a disposed inside the housing and a spherical ball 52b disposed at the upper end of the spring 52a so that the ball 52b is resiliently biased by the spring 52a, So as to be closely contacted to the inside of the sliding groove 51d disposed above.

10A to 10C are views each showing a cross-sectional structure taken along the line B-B 'in FIG. 5 and showing the operation of the stopper body 51 according to the rotation of the nut member 40. Referring to FIG. 10A, The one ball plunger 52 is moved upward by the elastic force and the end of the first ball plunger 52 slides along the inclined surface 62 on the sliding groove 51d, The engaging piece 51b is projected to the inside of the engaging hole 41 while the engaging piece 51b is pivoted counterclockwise to the inside of the nut member 40 so that the engaging piece 51b is caught on the ratchet member 32 of the nut member 40 Lt; / RTI >

At this time, the projecting surface 51e formed on the other side of the stopper body 51 is partially exposed to the outside of the cut-off hole 42 due to the counter-clockwise rotation of the stopper body 51.

10 is a view showing an operating state in the case where the nut member 40 is rotated in the forward direction, that is, the direction in which the bolt member 30 is inserted into the engaging hole 41 in FIG. 10A, When the member 40 rotates in the forward direction, the stopper body 51 is rotated clockwise about the shaft hole 51a while sliding the latch member 51b in the ratchet gear unit 32 rotating in the forward direction.

The first ball plunger 52 closely attached to the sliding groove 51d is moved downward along the inclined surface 62 of the sliding groove 51d while the stopper body 51 is rotated, 51b are moved back to the gear piece 32a corresponding to the next ratchet gear portion 32 and then elastically restored upward to push the stopper body 51 so that the engaging piece 51b is moved inward And the latch piece 51b is hooked on the next gear piece 32a of the ratchet gear portion 32. The nut member 40 can be continuously rotated in the normal direction while repeating such operation.

In addition, when the nut member 40 is rotated in the forward direction, the rotation preventing protrusion 51c of the stopper body 51 freely rotates without touching the side wall surface 42a of the cutout portion.

10C is a diagram showing an operating state when the nut member 40 is rotated in a reverse direction to the nut member 40 in Fig. 10A, that is, in a direction in which the bolt member 30 is unwound from the inside of the engaging hole 41, The stopper body 51 is pushed to the outside of the engaging hole 41 by one end of the stopper body 51 while the engaging piece 51b is slid to the ratchet member 32 of the nut member 40 when the stopper body 40 rotates in the reverse direction, Is rotated counterclockwise about the shaft hole 51a.

At the same time, the rotation preventing protrusion 51c is also rotated in the counterclockwise direction to contact the side wall surface 42a of the cutting hole 42, so that the turning radius is limited so that the stopper body 51 can not be rotated beyond a certain angle. As a result, the stopper body 51 can no longer be pivoted, and the latching piece 51b is not released from the groove of the gear piece 32a of the latching portion 32. [ The nut member (40) is not rotated in the reverse direction by the release preventing portion (50).

The present invention can prevent the bolt member (30) from being fixed by the elastic force of the second ball plunger (70) even if external vibration is generated by the second ball plunger (70) It is possible to restrain the nut member 40 from being easily rotated due to carelessness of the operator and also to prevent the nut member 40 from being rotated in the reverse direction by the unlocking portion 50 at the original time.

FIG. 11 is a view showing a structure in which a fastening socket for releasing the function of the release preventing part according to the present invention is coupled, and FIG. 12 is a view showing a state in which the fastening preventing part according to the present invention is inserted, .

When the clamping device according to the present invention is to be fastened to the pipe and then unlocked if necessary, the operator must turn the nut member (40) to loosen the nut member (40) inside the bolt member (30) The rotation of the nut member 40 in the reverse direction is restricted by the unlocking portion 50. To solve this problem, the stopper body 51 is pivoted by pressing the projecting surface 51e protruding outside the cut- shall.

Thus, although the operator can press the protruding surface 51e with his or her fingers, the protruding surface 51e protrudes to a height of at most 1 mm, preferably 0.7 mm, so that even if the operator presses it, The protruded surface 51e is not pushed inward so that the stopper body 51 can be pivoted by pressing the protruding surface 51e using a mechanism such as a tweezer so that the latching piece 51b is released. It is not very easy to work the nut member 40 in a state in which the projecting surface 51e is being pushed by the tool.

The fastening socket 60 capable of releasing the function of the release preventing portion 50 is inserted onto the second body 40c of the nut member 40 so as to press the projecting surface 51e to press the fastening piece 51b ) Is easily released from the ratchet mechanism (32).

A fixing hole 61 having a polygonal sectional shape corresponding to the outer shape of the third body 40c is formed on the inside of the fastening socket 60. An inclined surface 62 inclined upward is formed on the end of the fixing hole 61, And the fastening socket 60 is fastened to the end of the third body 40c of the nut member 40 as shown in Fig. 12, the projecting surface 51e protruding outside the cut- (62) of the cutter (60) while being pushed into the cutter hole (42). As a result, the stopper body 51 is rotated in the clockwise direction corresponding to the moving direction of the projecting surface 51e so that the latching piece 51b is released from the gear piece 32a of the latching portion 32, The engagement releasing state is maintained in a state where the engagement portion 60 is engaged.

In this way, by the simple operation of fastening the fastening socket 60 to the nut member 40, the function of the loosening preventing portion 50 can be released so that the operator can conveniently turn the nut member 40 to separate the clamping device from the pipe do.

FIG. 13 is a view schematically showing a procedure of clamping a pipe using a clamping device having a release preventing function according to the present invention.

13 (a), the first and second clamp units 10 and 20 are arranged so as to surround the pipe around the first hinge engaging portion 12, The bolt member 30 with the nut member 40 engaged is pivoted about the second hinge engaging portion 30a in the direction of the second clamp unit 20 so that the second clamp unit 30 20 into the fitting groove 22 formed in the fitting portion 22a.

13 (c), when the operator grasps the grip ring 80 provided on the outer surface of the nut member 40 so that the bolt member 30 is inserted into the engaging hole 41, So that the end of the first body 40a of the nut member 40 is brought into close contact with the fixing jaw 23 by rotating the nut 40 in the forward direction. In this state, the second ball plunger 70 and the release preventing portion 50 are fastened to the piping for a long time in the state of being fixed to the pipe, so that the nut member 40 is not easily rotated by the vibration and is not released in the reverse direction.

13 (d), the fastening sockets 60 are engaged with the fastening sockets 60 on the second body 40c of the nut member 40 so that the fastening pieces of the stopper body 51 The operator rotates the nut member 40 in the reverse direction while gripping the nut member 40 as shown in Figure 13 (e) in the state in which the engaging portions 51a, 51b are released from the gear piece 32a of the latch gear portion 32, Allow the device to unlock.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims should include all such modifications and changes as fall within the scope of the present invention.

10: first clamp unit 11: flange fastening groove
12: first hinge engaging portion 12a: hinge pin
12b: Connection
20: second clamp unit 21: flange fastening groove
22: fitting groove 23: fixing jaw
30: bolt member 30a: second hinge coupling part
31: Spacing thread
32: ratchet fisher part 32a: gear piece
40: nut member 40a: first body
40b: second body 40c: third body
41: coupling ball 42: incision ball
42a: side wall surface 43:
50: Loosening prevention part
51: Stopper body 51a:
51b: engaging piece 51c: rotation preventing projection
51d: sliding groove 51e: projecting surface
52: first ball plunger 52a: spring
52b: Ball 53: Retaining pin
60: fastening socket 61: fastening hole
62:
70: second ball plunger
80: Phage ring

Claims (7)

A semicircular first clamp unit having a flange engagement groove formed on an inner peripheral surface thereof;
A second clamp unit having a semicircular shape, one end of which is hinged to one end of the first clamp unit so as to be pivotable, a fitting groove is formed at the other end, and a flange coupling groove is formed on the inner circumferential surface;
A bolt member hinged on one end of the first clamp unit so as to be pivotable on one end, a thread adjusting thread extending on the outer circumferential surface on the other side, and a latch gear part formed on the outer circumferential surface on the other end side;
Wherein a bolt member is formed on one side of the bolt member so that the bolt member is threadedly engaged with the bolt member and the bolt member is threadedly engaged with the bolt member to adjust the gap between the first and second clamp units, A nut member for fastening the first clamp unit and the second clamp unit to each other; Including,
A cut-out hole is formed at one side of the outer surface of the nut member, the cut-out hole being cut inward to communicate with the coupling hole,
Further comprising a loosening preventing portion that is rotatably and axially coupled to the inside of the incising hole so as to prevent reverse rotation in which the nut member is loosened while being selectively rotated by a ratchet member inserted into the engaging hole while one end is rotated,
The release-
And a latching protrusion protruding inward from the coupling hole to be engaged with the gear piece of the latch gear portion is formed at one end of the shaft hole, A stopper body having a sliding groove formed in an outer side and a slope in an opposite direction to the engaging piece and having a protruding surface exposed at a certain portion outside the incising hole at the other end,
And a first ball plunger installed inside the cut-out hole, the first ball plunger being partly protruded upward by elasticity and closely fixed to the sliding groove,
The first ball plunger is protruded upward by elasticity so that the end of the first ball plunger slides on the sliding groove and one end of the stopper body is pushed to the inside of the engaging hole to project the engaging piece into the engaging hole, The projecting surface is exposed to the outside of the incision hole,
When the nut member is rotated in the reverse direction, the engaging piece slides on the gear piece of the latch gear portion, and one end of the stopper body is pushed outside the engaging hole so that the rotation preventing protrusion contacts the side wall surface of the cut- And the rotation radius is limited.
delete The method according to claim 1,
Wherein the protruding surface protrudes to a height of 1 mm or less outside the cut-out hole.
The method according to claim 1,
The outer shape of the nut member in which the cut-out hole is formed is formed into a polygonal cross-sectional structure,
A fixing hole having a shape corresponding to a polygonal cross-sectional structure of the nut member is formed on an inner side of the fixing hole, and an inclined surface inclined upwardly is formed on an end of the fixing hole,
When the fastening socket is fastened to one end of the nut member, the protruding surface of the stopper body is slid along the slope surface and is moved to the inside of the cut-off hole. The stopper body is rotated in the direction in which the protruding surface is moved, Wherein the engaging portion is engaged with the gear piece of the latch gear portion.
The method according to claim 1,
The nut member
A first body having a cylindrical shape and a coupling hole formed on an inner side of the coupling hole in the longitudinal direction, the coupling hole having a thread for screwing with the bolt member;
A second body formed integrally with the other end of the first body to communicate with the coupling hole and having an installation hole penetrating through the coupling hole on an outer surface thereof,
And a third body formed integrally with the other end of the second body to communicate with the coupling hole and having a polygonal outer surface and a cutout hole communicating with the coupling hole on one side of the outer surface. Clamping device.
6. The method of claim 5,
A spring inserted into the mounting hole, and a second ball including a resilient pressing body having one end thereof in close contact with the spring in a plate shape and the other end in a hemispherical shape and protruding from the mounting hole at a predetermined portion in the fitting hole, Further comprising a plunger. ≪ Desc / Clms Page number 20 >
The method according to claim 6,
Further comprising a grip ring having a ring-shaped outer surface formed with non-slip projections,
And the nut member is inserted into the inside of the grip ring so that the inner edge of the grip ring is pressed against the outer edge of the second body.

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