JPH1151018A - Fastening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To receive load applied to the direction to deviate an axis of a connection hole in order to transmit it to connected members mutually by screwing a male screw part into a sleeve cylinder part through a spring having a pair of nail parts. SOLUTION: In connecting connected members 2, 3 by means of a fastening device 1 comprising a screw 11, a spring 12 and a sleeve 13, the spring 12 is inserted into the sleeve 13 and the screw 11 is screwed slightly to form an assembled body. Under the condition, a tip of a cylinder part 41 of the sleeve 13 protrudes out of a connection hole 9 and a head 42 of the sleeve 13 is engaged with a tapered hole 10. Thereafter, when the screw 11 is screwed in, a male screw 22 thereof abuts on a pair of nail parts 36 to push it wide to its outer diameter direction. The paired nail parts 36 protrude from notched parts 46 and engaged therewith, and its tapered parts 38 engage with the edge of the connection hole 9, respectively. According to the action of the tapered parts 38, the spring 12 holds the connected members 2, 3 between the nail parts 36 and the sleeve head 42 to generate tensile force, thereby performing the connection with a proper fastening force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper which is inserted into a coupling hole formed in a plurality of coupling members from one surface side and integrally couples the plurality of coupling members.

[0002]

2. Description of the Related Art Conventionally, various types of fasteners have been used for connecting structural parts such as automobiles or for connecting interior parts to structural parts. In particular, for example, a nut is mounted on the back side of the parts. When this is not possible, a fastener (blind fastener) is used that can connect the components from one direction on the surface side of the components.

Such a stopper has, for example, a screw and a spring. When the screw is not screwed in, the claw portion of the spring is shifted toward the center of the screw shaft, and the claw of the spring is interlocked with the screwing of the screw. There is a structure configured so that the part can be spread.

When the two connecting members are connected by the stopper, a connecting hole is formed in each connecting member, and the connecting member is connected to the connecting hole of the front connecting member and the connecting member of the rear side. After inserting in the order of the holes, screw the screw of the stopper to push out the claw of the spring,
By engaging the claw portion with the connecting member on the back side, the two connecting members are tightened and fixed in the axial direction of the stopper.

[0005]

However, in the conventional stopper, the main purpose is to tighten and fix the two connecting members in the axial direction of the stopper, that is, in the connecting direction of the two connecting members. No special consideration is given to transmitting a load applied to the coupling members in a direction orthogonal to the coupling direction of the two coupling members, that is, in a direction in which the axis of the coupling hole is shifted.

In other words, when a load applied in a direction perpendicular to the coupling direction of the two coupling members, that is, in a direction in which the axis of the coupling hole is displaced, is received by the stopper and transmitted to the coupling members, each coupling member has It is necessary to make the diameters of the coupling holes substantially the same and to reduce the gap between the stopper and the coupling holes. However, considering the displacement of the coupling holes of the two coupling members due to an assembly error, it is necessary to reduce the shaft diameter of the stopper as compared with a case where the deviation is not considered, or
Considering that the diameter of the coupling hole of the coupling member on the back side is enlarged from the beginning so that the eccentricity of the axis of the coupling hole can be absorbed and the insertion of the stopper is made easier, the coupling with the enlarged hole diameter The shaft diameter of the stopper is smaller than the hole. In such a case, a gap between the stopper and the coupling hole becomes large, and it becomes difficult for the stopper to receive a load applied in a direction in which the axis of the coupling hole is shifted and to transmit the load to the coupling members.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and a coupling hole of a coupling member on a rear side is larger than a coupling hole of a coupling member on a front side. Even when applied to a joint where the axis of the coupling hole is eccentric, the coupling member receives a load applied in a direction perpendicular to the coupling direction of the coupling members, that is, in a direction in which the axis of the coupling hole is shifted. It is an object of the present invention to provide a stopper that can transmit to each other and that can obtain a stable coupling force of a plurality of coupling members.

[0008]

According to a first aspect of the present invention, there is provided a fastener having a male screw portion and a screw head, a base portion through which the male screw portion of the screw is inserted and the screw head is engaged, and A pair of claw pieces are provided extending from the base in correspondence with the axial direction of the screw and formed at their ends with claw portions which are pushed in the outer diameter direction of the male screw portion by engagement with the male screw portion. A sleeve having a spring engaged therein and a male thread portion of the screw being screwed therein, and a sleeve projecting from an outer peripheral portion on one end side of the sleeve cylinder and being engaged with a base of the spring. A sleeve having a notch formed at a part of the head and the other end of the sleeve cylinder so that a pair of claws of the spring can protrude in an outer radial direction.

When connecting a plurality of connecting members through the connecting holes formed in the connecting members, the other end of the sleeve penetrates from the connecting hole of the front connecting member to the connecting hole of the back connecting member. After inserting and engaging the side, a screw is screwed into this sleeve, and a pair of claw portions of the spring are projected from a pair of notch portions on the other end side of the sleeve and joined to the coupling member on the back side, The plurality of connecting members are tightened and connected in the axial direction of the stopper. Therefore, even when the coupling hole of the coupling member on the back side is larger than the coupling hole of the coupling member on the near side, the sleeve inserted into the coupling hole of the coupling member on the back side can prevent the coupling direction of the plurality of coupling members. It is possible to receive the load applied in the direction orthogonal to the coupling hole, that is, the direction in which the axis of the coupling hole is shifted, and to transmit the mutual coupling members to each other. Even in the case of eccentricity, by rotating the spring together with the sleeve, the pair of claws are adjusted so that they are almost evenly joined to the edge of the coupling hole of the coupling member on the back side, and the plurality of coupling members are stabilized. Thus, it is possible to obtain an improved bonding force.

According to a second aspect of the present invention, in the first aspect, the sleeve is formed on the inner surface of the sleeve cylinder along the axial direction, and the pair of claw portions of the spring is engaged with the sleeve. The spring has a groove and a rotary operation part formed in the head of the sleeve. The spring is integrated with the sleeve by engaging a pair of claw pieces of the spring with the pair of grooves of the sleeve. The operation of the sleeve can be performed, and the operation of rotating the sleeve can be performed by the rotation operation portion formed on the head of the sleeve, and the operation of stopping the rotation of the sleeve against the screwing of the screw can be performed.

According to a third aspect of the present invention, there is provided the stopper according to the first or second aspect, wherein the outer surface of each claw portion of the spring is formed with a tapered surface portion which protrudes in a radial direction toward the distal end. When a tapered surface formed on the outer surface of each claw portion of the spring engages with the connecting member on the back side, a tightening force is generated in the axial direction of the stopper by the action of the tapered surface, and a plurality of Are joined.

According to a fourth aspect of the present invention, there is provided the stopper according to any one of the first to third aspects, wherein the rotating operation portion of the sleeve is an engagement concave portion formed on a distal end surface of the sleeve head. The rotation operation and the rotation stop operation of the sleeve can be performed by hooking a tool or the like on the engagement recess.

According to a fifth aspect of the present invention, there is provided the stopper according to any one of the first to third aspects, wherein the turning operation portion of the sleeve has a polygonal engagement portion formed in a polygonal shape around the sleeve head. In addition, the sleeve can be easily manufactured, and the rotation operation and the rotation stop operation of the sleeve can be performed by hooking a tool such as a wrench on the polygonal engagement portion.

According to a sixth aspect of the present invention, there is provided the stopper according to any one of the first to fifth aspects, further comprising an annular packing engaged around a sleeve cylinder of the sleeve. Airtightness and liquid tightness are ensured for the tool.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a fastener (blind fastener) according to an embodiment of the present invention.

FIGS. 1 to 9 show a first embodiment. FIG. 1 is a perspective view of a disassembled state of a stopper, FIG. 2 is a plan view of an assembled state of the stopper, and FIG. A sectional view, FIG. 4 is a plan view of a part of a connecting member connected by a stopper, FIG.
4 is a cross-sectional view taken along the line BB of FIG. 4, FIG. 6 is a cross-sectional view showing a mounting process of the fastener to the coupling member, FIG. 7 is a cross-sectional view showing a mounting state of the fastener to the coupling member, and FIG. FIG. 9 is a perspective view of a connecting member to be connected, and FIG. 9 is a sectional view of the connecting member connected by a stopper.

8 and 9, reference numeral 1 denotes a stopper.
The two connecting members 2 and 3 are integrally connected by the stopper 1. In addition, of the two connecting members 2 and 3,
One connecting member 2 on the side where the stopper 1 is inserted is referred to as a front connecting member 2, and the other connecting member 3 on the side opposite to the side where the stopper 1 is inserted is a connecting member on the back side. Called 3.

The front connecting member 2 includes upper and lower plate members 4 and 5.
And a part of the plate members 4 and 5 is superposed and integrally joined by a fixing member 6 composed of a plurality of sets of bolts and nuts. The rear connecting member 3 is an equipment mounting rail having a substantially U-shaped cross section for supporting the equipment 7 with respect to the front connecting member 2.

The coupling members 2 and 3 have coupling holes 8 and 9 into which the stoppers 1 are inserted, corresponding to the mounting positions of the stoppers 1.
Are formed respectively. A tapered hole 10 is formed at the opening edge of the coupling hole 8 of the coupling member 2 on the near side.
The coupling holes 9 of the coupling member 3 on the back side are coupled holes 8, 9 described later.
To be able to absorb the eccentricity of the shaft center of
In order to facilitate the insertion of the connecting member 2, the connecting member 8 is formed to have a larger diameter than the connecting hole 8 of the connecting member 2 on the near side.

Next, referring to FIG. 1 to FIG.
Is composed of a screw 11, a spring 12, and a sleeve 13.

The screw 11 is, for example, a metal countersunk screw, and has a shaft portion 21 and a screw head 23 protruding from an outer peripheral portion on one end side of the shaft portion 21. A male screw part 22 is formed on the peripheral surface of the shaft part 21. A tapered surface portion 24 is formed on the shaft portion 21 side of the screw head 23, and a flat end surface portion 25 is formed on the end surface side, and a slot 26 for a minus-shaped driver engagement is formed on the end surface portion 25. ing.

The spring 12 is made of, for example, metal or synthetic resin, and extends from a ring portion 31 as a base and a symmetrical position on the circumference of the ring portion 31 in an axial direction of the screw 11. It has a pair of claw pieces 32.

An engaging hole 33 is formed in the ring portion 31 so that the male screw portion 22 of the screw 11 can be inserted and the screw head 23 is additionally inserted. Part 23
A tapered hole portion 34 with which the tapered surface portion 24 is engaged is formed, and a tapered step portion 35 is formed on the outer surface of the ring portion 31.

At the tip of each claw portion 32, a tapered claw portion 36 is formed, and an inner surface and an outer surface continuous from the claw portion 32 portion of each claw portion 36 are formed inwardly toward the tip side. In addition, tapered surface portions 37 and 38 protruding outward are formed, respectively.

Then, as shown in FIG.
In a state where no external force acts on the pair (the state before the attachment of the stopper 1), a gentle bending process is performed on the pair of claw pieces 32 so that the claw portions 36 approach each other.

The sleeve 13 is made of, for example, metal and has a sleeve cylinder 41 and a sleeve head 42 protruding from an outer peripheral portion on one end side of the sleeve cylinder 41. Through hole penetrating 42 in the axial direction
43 are formed.

On the inner peripheral surface of the sleeve cylinder portion 41, a female screw portion 44 into which the male screw portion 22 of the screw 11 is screwed is formed, and a pair of claw pieces of the spring 12 are symmetrically positioned on the circumference.
A pair of grooves 45 with which the respective 32 are engaged are formed. A notch 46 is formed on the other end side of the sleeve cylinder portion 41 so that the pair of claw portions 36 of the spring 12 can protrude in the outer diameter direction following the pair of groove portions 45.

A tapered surface portion 47 is formed on the sleeve cylinder portion 41 side of the sleeve head portion 42, and a flat end surface portion 48 is formed on the end surface side, and a pair of groove portions 45 are formed on the end surface portion 48.
An engagement concave portion 49 as a rotation operation portion is formed at a position orthogonal to. Inside the sleeve head 42, the spring 12
A storage recess 50 is formed to house the ring portion 31 and the screw head 23 of the screw 11 in a buried state, and a tapered hole portion 51 is formed at the bottom of the storage recess 50 to engage the tapered step 35 of the spring 12. ing.

Next, the operation of the first embodiment will be described.

When connecting the connecting members 2 and 3 by the stopper 1, as shown in FIG. 6, the stopper 1 is an assembly in which a spring 12 is inserted into a sleeve 13 and a screw 11 is slightly screwed. .

In the assembled state of the stopper 1, the pair of claw portions 32 of the spring 12 are engaged with the pair of groove portions 45 of the sleeve 13 to be integrated in the rotation direction, and
The ring portion 31 of the spring 12 is stored in the storage recess 50 of the thirteen. The pair of claw portions 36 of the spring 12 are arranged inside the notch portion 46 by a gentle bending process applied to the claw piece portion 32, do not protrude from the notch portion 46, and It is located in the corresponding area.

Then, as shown in FIG. 6, the assembly of the stopper 1 is sequentially inserted from the coupling hole 8 of the coupling member 2 on the near side to the coupling hole 9 of the coupling member 3 on the back side. At this time, since the coupling hole 9 of the coupling member 3 on the rear side is formed to have a larger diameter than the coupling hole 8 of the coupling member 2 on the near side, the axis of the coupling holes 8 and 9 of the coupling members 2 and 3 is aligned. Even in the case of eccentricity, the eccentricity can be absorbed and the stopper 1 can be easily inserted into the coupling holes 8 and 9.

When the assembly of the stopper 1 is inserted into the coupling holes 8 and 9 of the coupling members 2 and 3 (see FIG. 7), the sleeve 13
The distal end of the sleeve cylindrical portion 41 is connected to the coupling hole 9 of the coupling member 3 on the back side.
The notch 46 is exposed to the coupling hole 9 of the coupling member 3 on the back side, and further, the sleeve head of the sleeve 13
42 is engaged with the tapered hole 10 of the coupling member 2 on the near side.

After that, the screw 11 is screwed into the sleeve 13. As the screw 11 is screwed into the sleeve 13, the screw
The male screw part 22 of 11 abuts on a pair of claw parts 36 of the spring 12 and pushes out in the outer diameter direction. At this time, the male thread of screw 11
Since the abutment 22 comes into contact with the tapered surface portion 37 formed on the inner surface of the pair of claw portions 36 of the spring 12, the pair of claw portions 36 can be pushed and spread smoothly.

A pair of claw portions 36 which are pushed and spread in the outer diameter direction in accordance with the screwing of the screw 11 protrude from the notch portion 46 of the sleeve 13, and as shown in FIG.
Engage with the edges of the coupling holes 9 of the coupling member 3 on the back side.

Further, when the screw 11 is screwed in, the spring 12 is drawn into the connecting member 3 on the rear side by the action of the tapered surface portion 38, and the spring 12 is connected between the claw portion 36 and the sleeve head 42 of the sleeve 13. A tensile force is generated across the members 2 and 3, and the connecting members 2 and 3 can be connected with an appropriate tightening force.

When the screw 11 is screwed into the sleeve 13, in order to prevent the sleeve 13 from rotating together with the screw 11, a pressing tool (not shown) is provided in the engagement recess 49 of the sleeve 13. Is engaged, the rotation of the sleeve 13 can be stopped.

The screw head 23 of the screw 11 is
The screw 11 and the sleeve 13 are substantially flush (smooth) with respect to the surface of the coupling member 2 on the front side.

When the axes of the coupling holes 8 and 9 of the coupling members 2 and 3 are substantially the same, the pair of claw portions 36 are almost at the edge of the coupling hole 9 of the coupling member 3 on the back side. Since the joining is performed uniformly, a stable joining force of the plurality of joining members 2 and 3 can be obtained.

Further, as shown in FIG.
If the axes of the coupling holes 8 and 9 are eccentric,
During the screwing process, the sleeve 13 and the sleeve 13 are
The spring 12 is rotated integrally with the connecting member 3 on the back side.
A pair of claw portions of the spring 12 with respect to a peripheral portion of the coupling hole 9
Adjust so that 36 is properly joined. That is, at the peripheral edge of the coupling hole 9 of the rear coupling member 3, there are two points P having the same distance L with respect to the axis of the coupling hole 8 of the front coupling member 2. By rotating the sleeve 13 so that the claw portions 36 are joined, the pair of claw portions 36 are adjusted so as to be almost uniformly joined to the edge of the coupling hole 9 of the coupling member 3 on the back side, and Connecting members 2 and 3
Can obtain a stable bonding force.

Therefore, when a plurality of connecting members 2 and 3 are connected through the connecting holes 8 and 9 formed in the connecting members 2 and 3, the connecting members 8 on the near side and the connecting members 3 on the back side are connected. After the other end of the sleeve 13 is inserted into and engaged with the coupling hole 9 of the
And a pair of claws 36 of the spring 12 are projected from a pair of notches 46 on the other end side of the sleeve 13 to be joined to the coupling member 3 on the back side. , 3 can be tightened and combined. Therefore, even when the coupling hole 9 of the rear coupling member 3 is larger than the coupling hole 8 of the front coupling member 2, the plurality of couplings can be performed by the sleeve 13 inserted into the coupling hole 9 of the rear coupling member 3. A load applied in a direction perpendicular to the joining direction of the members 2 and 3, that is, in a direction in which the axes of the joining holes 8 and 9 are shifted, can be transmitted to the joining members 2 and 3. Member 2
Even when the axial centers of the coupling holes 8 and 9 are eccentric between the coupling member 3 and the rear coupling member 3, the pair of claw portions 36 couple the coupling member 3 on the rear side by rotating the spring 12 together with the sleeve 13. Adjust so that it is almost evenly joined to the edge of the hole 9,
A stable coupling force between the plurality of coupling members 2 and 3 can be obtained.

Next, FIGS. 10 and 11 show a second embodiment.

FIG. 10 is a perspective view of the disassembled state of the stopper, and FIG. 11 is a cross-sectional view showing the state of attachment of the stopper to the connecting member.

The same components and effects as those of the first embodiment are denoted by the same reference numerals and their description is omitted.

In the second embodiment, an annular packing 61 such as a rubber O-ring is engaged around the sleeve cylinder 41 of the sleeve 13. An annular groove to engage the packing 61 below
62 are formed.

Then, as shown in FIG. 11, when the stopper 1 is mounted, the packing 61 is
It is sandwiched between the tapered hole portion 62 of the coupling member 2 on the near side and the tapered hole portion 10 and is in close contact with them.

The screw 11, the spring 12, and the sleeve 13
Airtightness and liquid tightness can be ensured by firmly tightening the screw 11.

Next, FIGS. 12 and 13 show a third embodiment.

FIG. 12 is a perspective view showing the disassembled state of the stopper, and FIG. 13 is a cross-sectional view showing the state where the stopper is attached to the connecting member.

The same components and effects as those of the first embodiment are denoted by the same reference numerals and their description is omitted.

In the third embodiment, a polygonal engaging portion 71 as a hexagonal rotary operation portion is formed around the sleeve head 42 of the sleeve 13.

Then, as shown in FIG. 13, when the stopper 1 is mounted, the polygonal engaging portion 71 is joined to the surface of the coupling member 2 on the front side. A tool such as a spanner is hooked on the polygonal engaging portion 71, so that the rotation operation and the rotation stop operation of the sleeve 13 can be easily performed.

Therefore, when it is not necessary to make the stopper 1 substantially flush (smooth) with the surface of the coupling member 2 on the front side, the coupling member 2 on the front side is tapered as in the first embodiment. The chamfering process for forming the hole 10 can be omitted, and the manufacturing can be facilitated and the cost can be reduced.

It should be noted that the polygonal engaging portion 71 is not limited to a hexagonal shape, and the same effect can be obtained even if the polygonal engaging portion 71 is formed in a polygonal shape such as a triangle, a quadrangle or a pentagon.

[0055]

According to the first aspect of the present invention, when a plurality of coupling members are coupled through the coupling holes formed in the coupling members, the coupling member of the near side coupling member is connected to the coupling member of the rear side. After inserting and engaging the other end of the sleeve so as to penetrate the coupling hole, screw a screw into this sleeve,
A pair of claw portions of the spring protrude from a pair of notch portions on the other end side of the sleeve, and are joined to the connection member on the back side, and the plurality of connection members can be tightened and connected in the axial direction of the stopper. Therefore, even when the coupling hole of the coupling member on the back side is larger than the coupling hole of the coupling member on the near side, the sleeve inserted into the coupling hole of the coupling member on the back side can prevent the coupling direction of the plurality of coupling members. A load applied in a direction orthogonal to the coupling hole, that is, in a direction in which the axis of the coupling hole is displaced, can be transmitted to the coupling members, and the axial center of the coupling hole is deviated between the front coupling member and the rear coupling member. Even in the case of centering, by rotating the spring together with the sleeve, the pair of claws are adjusted so as to be almost evenly joined to the edge of the coupling hole of the coupling member on the back side, and the plurality of coupling members are stabilized. A binding force can be obtained.

According to the stopper of the second aspect, the first aspect is provided.
In addition to the effect of the stopper described above, the spring can be reliably rotated integrally with the sleeve by engaging the pair of claw pieces of the spring with the pair of grooves of the sleeve, and formed on the sleeve head. With the rotation operation portion thus performed, the rotation operation of the sleeve can be easily performed, and the rotation stop operation of the sleeve against the screwing of the screw can be easily performed.

According to the stopper of the third aspect, the first aspect is provided.
Or, in addition to the effect of the stopper described in 2, the taper surface formed on the outer surface of each claw portion of the spring engages with the coupling member on the back side, so that the action of the taper surface causes the stopper to move in the axial direction. A fastening force is generated, and the plurality of connecting members can be reliably connected.

According to the stopper of the fourth aspect, the first aspect is provided.
In addition to the effect of the stopper described in any one of the above-described items 3, the turning operation portion of the sleeve is an engagement concave portion formed on the distal end surface of the sleeve head, and a tool or the like is hooked on this engagement concave portion to rotate the sleeve. The moving operation and the rotation stopping operation can be easily performed.

According to the stopper of the fifth aspect, the first aspect is as follows.
In addition to the effects of the stopper according to any one of the above-described items 3, the turning operation portion of the sleeve is a polygonal engagement portion formed in a polygonal shape around the sleeve head, so that the sleeve can be easily manufactured. The operation of rotating the sleeve and the operation of stopping the rotation of the sleeve can be easily performed by hooking a tool such as a spanner on the polygonal engaging portion.

According to the stopper of the sixth aspect, the first aspect is provided.
In addition to the effect of the stopper described in any one of the above-described items 5, since the annular packing is provided so as to be engaged around the sleeve cylindrical portion of the sleeve, airtightness and liquid tightness can be secured for the stopper. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a stopper according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the assembled state of the stopper.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a plan view of a part of a coupling member coupled by the stopper.

FIG. 5 is a sectional view taken along the line BB of FIG. 4;

FIG. 6 is a cross-sectional view showing a process of attaching the stopper to the connecting member.

FIG. 7 is a cross-sectional view showing a state where the stopper is attached to a coupling member.

FIG. 8 is a perspective view of a coupling member coupled by the stopper.

FIG. 9 is a cross-sectional view of the connecting member connected by the stopper.

FIG. 10 is an exploded perspective view of a stopper according to a second embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a state where the stopper is attached to a coupling member.

FIG. 12 is an exploded perspective view of a stopper according to a third embodiment of the present invention.

FIG. 13 is a cross-sectional view showing a state where the stopper is attached to a coupling member.

[Explanation of symbols]

 1 Stopper 11 Screw 12 Spring 13 Sleeve 22 Male screw part 23 Screw head 31 Ring part as base 32 Claw piece 36 Claw part 38 Tapered surface part 41 Sleeve cylinder part 42 Sleeve head 45 Groove part 46 Notch part 49 Rotating operation part Recessed 61 as packing 61 Packing 71 Polygonal engaging part as rotating operation part

Claims (6)

[Claims] 1. A screw having a male screw portion and a screw head, a base portion through which the male screw portion of the screw is inserted and the screw head is engaged, and a base extending from the base in an axial direction of the screw. A spring having a pair of claw pieces formed at its tip and formed at its tip with a claw that is pushed in the outer diameter direction of the male screw by engagement with the male screw; and A sleeve cylinder portion to which a male screw portion of the screw is screwed; a sleeve head projecting from an outer peripheral portion on one end side of the sleeve cylinder portion and engaging the base of the spring; A sleeve having a notch formed in a notch in the portion so that a pair of claw portions of the spring can protrude in an outer radial direction. 2. The sleeve has a pair of grooves formed in the inner surface of the sleeve cylinder along the axial direction and engaging a pair of claw pieces of the spring, and a rotating operation part formed in the sleeve head. The stop according to claim 1, wherein the stop is provided. 3. The stopper according to claim 1, wherein a tapered surface portion is formed on an outer surface of each of the claw portions of the spring so as to protrude toward the distal end in an outer radial direction. 4. The stopper according to claim 1, wherein the rotation operation portion of the sleeve is an engagement concave portion formed on a front end surface of the sleeve head. 5. The stopper according to claim 1, wherein the rotary operation portion of the sleeve is a polygonal engagement portion formed in a polygonal shape around the sleeve head. 6. The stopper according to claim 1, further comprising an annular packing engaged around a sleeve cylinder of the sleeve.