JP2000065276A - Connecting structure of tubular member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure of tubular member in which the first tubular member and the second tubular member can be connected by only inserting the second tubular member to the first tubular member, and the connection can be released by rotating one side or both sides. SOLUTION: A wedge holder 14 having a taper surface 16 is installed to a first tubular member 10, to hold a wedge 30. When a second tubular member 20 is inserted to the first tubular member 10, the diameter of the wedge 30 is extended, and a male screw 22 is inserted in the wedge 30 as it is. When the second tubular member 20 is going to be removed, taper surfaces 16 and 34 are abutted each other, a female screw on the inner periphery of the wedge 30 bites to the male screw 22, and the removal of the tubular member 20 is blocked. The tubular member 20 can be removed by rotating it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for a tubular member, and more particularly, to connecting a second tubular member to a first tubular member by simply inserting the second tubular member into the first tubular member. The present invention relates to a connection structure of a tubular member that turns a tubular member in a direction.

[0002]

2. Description of the Related Art In connecting pipes to each other or a joint and a pipe, both are directly screwed or a union nut is used.

[0003]

In connection with such a conventional screw connection, the screw must be fully turned in both cases of connection and disconnection, which is troublesome.

[0004] It is an object of the present invention to provide a connecting structure of tubular members which only requires inserting the second tubular member into the first tubular member when connecting.

[0005]

According to a first aspect of the present invention, there is provided a connecting structure for a tubular member, wherein a second tubular member is inserted into a first tubular member and a male member on an outer peripheral surface of the second tubular member. In a structure in which the first and second tubular members are connected to each other by a screw, an annular locking body held on an inner peripheral surface of the first tubular member is engaged with a male screw of the second tubular member. The first
And the second tubular member is connected to the second tubular member.

[0006] In such a connecting structure of tubular members, the second tubular member is inserted into the locking body to connect the tubular members. When a force is applied in the withdrawal direction of the second tubular member, the second tubular member is locked to the first tubular member via the locking body, and the second tubular member is pulled out. Will be blocked.
By turning one or both of the first and second tubular bodies in the screw releasing direction, the connection between the tubular members is released.

According to a second aspect of the present invention, the outer peripheral surface of the second tubular member is provided with a tapered surface which is reduced in diameter in the direction in which the first tubular member is extracted, and the outer peripheral surface of the locking member is provided with the tapered surface. In the case where a tapered surface engaged with the surface is provided, when the force in the extraction direction of the second tubular member is applied, the force in the extraction direction is converted into the centripetal force by the tapered surface. And the stopper is strongly pressed against the outer peripheral surface of the second tubular member, thereby preventing the second tubular member from being pulled out.

According to a third aspect of the present invention, a lock nut that presses the first and second tubular members in the separating direction to press the tapered surfaces together is screwed to the second tubular member, so that the locking member is provided. Strongly against the outer peripheral surface of the second tubular member,
The tubular members can be firmly connected to each other.

According to the fourth aspect of the present invention, by providing an elastic body for pressing the locking body in a direction in which the second tubular member is pulled out, the locking body is strongly pressed against the outer peripheral surface of the second tubular member.
The tubular members can be firmly connected to each other.

[0010] When the urging member for urging the locking member in the radial direction is provided on the locking member, the locking member can be connected to the second tubular member without providing a tapered surface. And the tubular members can be firmly connected to each other.

When the inner peripheral side of the locking member is elastically deformable in the centripetal direction, the second tubular member can be easily inserted into the locking member. In this case, as in claim 7, the locking body may be pressed against the outer peripheral surface of the second tubular member by its own elastic force,
The pressure receiving portion may be provided as in claim 8, and may be pressed against the outer peripheral surface of the second tubular member by the fluid pressure in the tubular member.

According to a ninth aspect of the present invention, the locking member is applied to the inner peripheral surface of the first tubular member in an uncured state, and after the second tubular member is inserted into the first tubular member. It may be formed by curing.

According to a tenth aspect of the present invention, there is provided a tubular member connecting structure comprising:
In a structure in which the second tubular member is inserted into the first tubular member and the first and second tubular members are connected to each other by a male screw on the outer peripheral surface of the second tubular member, the inner periphery of the first tubular member is A female screw engaged with the male screw is provided on the surface,
The portion of the first tubular member provided with the female screw is elastically deformable outward, and a ring for preventing the elastic deformation outward is attached to the first tubular member. Things.

In this case, the second tubular member is inserted into the first tubular member without being restrained by the ring, and then the first tubular member is prevented from deforming outward by the ring. Concatenate.

In order to separate the two connected members, one or both of the tubular members may be turned.

In order to make the first tubular member elastically deformable outward, the first tubular member may be provided with a slit.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show a first embodiment of the present invention. FIG. 1A is a cross-sectional view, FIGS. 1B and 1C are perspective views of wedges 30 and 36, respectively, and FIG. FIG. 3 is a sectional view of a wedge 36.

The tubular member body 12 of the first tubular member 10 is inserted into the opening 2 of the counter 1 and the nut 4 is tightened through the washer 3 so that the tubular member body 12 is fixed to the counter 1. I have. This tubular member body 12
, A wedge holder 14 is screwed. The inner peripheral surface of the wedge holder 14 is provided with a tapered surface 16 having a shape that is reduced in diameter in the direction in which the second tubular member 20 is pulled out. The wedge 30 is disposed in the wedge holder 14.

The wedge 30 is provided with three divided bodies 32 each having a shape obtained by equally dividing the ring into three parts in the circumferential direction, and a female screw is provided on the inner peripheral surface of each divided body 32. This female screw can be engaged with a male screw 22 on the outer periphery of the second tubular member 20.

The tapered surface 34 of the wedge 30 is pressed against the tapered surface 16 of the wedge holder 14 by a spring 40.
Reference numerals 42 and 44 indicate O-rings.

The second tubular member 20 is connected to the first tubular member 10
The wedge 30 is previously mounted on the tubular member main body 12 by the wedge holder 14 in order to connect to the main body. In this state, the distal end side of the second tubular member 20 is inserted into the first tubular member 10, and the distal end side of the second tubular member 20 is inserted into the center hole of the wedge 30. In this case, the wedge 30 is retracted upward while pressing the spring 40, and the divided bodies 32, 32, 32 are separated from each other. The external thread 22 of the second tubular member 20 is
The second tubular member 20 is pushed over the female screw on the inner peripheral surface of the second tubular member.

After the second tubular member 20 is pushed into the wedge 30 in this manner, when the second tubular member 20 is to be pulled out, the tapered surface 34 of the wedge 30 comes into contact with the tapered surface 16 of the wedge holder 14, and the division is performed. The body 32 is pressed in the centripetal direction and the wedge 3
The 0 internal thread is strongly engaged with the external thread 22 of the second tubular member 20, and the second tubular member 20 is prevented from coming off.

The second tubular member 20 is connected to the first tubular member 10
In order to remove the male screw from the female screw of the wedge 30, the second tubular member 20 may be rotated to rotate the male screw 22 from the female screw of the wedge 30.

As described above, according to this embodiment, the tubular members 10, 20 can be connected to each other only by pushing the second tubular member 20 into the first tubular member 10.

In this embodiment, as described above, the tapered surfaces 16 and 34 come into contact with each other, so that the wedge 30 is strongly engaged with the male screw 22 and the second tubular member 20 is securely removed. Is prevented. Furthermore, in this embodiment, since the spring 40 constantly presses the wedge 30 in the downward direction in FIG. 1A, the second tubular member 20 is not subjected to a force in the removal direction. Even if there is, the wedge 30 is urged in the centripetal direction, and the female screw of the wedge 30 is strongly engaged with the male screw 22.

In FIGS. 1A and 1B, three divided bodies 32 are shown.
Although a wedge 30 is used in the present invention, FIG.
(C) As shown in FIG.
May be used.

In the embodiment of FIG. 1, the wedges 30, 3
Each of 0A has a tapered surface 34, but in the present invention, as shown in FIG. 2, a wedge 30B having a cylindrical outer peripheral surface may be used. The wedge 30B is provided with three divided bodies 38 having a shape equally divided into three in the circumferential direction, and these divided bodies 38 are urged in a centripetal direction by a ring-shaped tightening spring 39 to form an annular shape. As shown in FIG. 2A, the wedge holder 14A does not have the tapered surface 16.

When the second tubular member 20 is connected to the first tubular member 10A, the second tubular member 20 is simply inserted into the first tubular member 10A and engaged with the wedge 30B. good. When removing the second tubular member 20, the second tubular member 20 may be turned to separate from the wedge 30B.

In the present invention, as shown in FIG. 3, a male screw 24 is provided on the second tubular member 20A,
4 and a lock nut 50 is screwed into the lock nut 50.
May be screwed upward in FIG. 2 to press the tapered surfaces 16 and 34 together to urge the wedge 30 in the centripetal direction, thereby firmly connecting the tubular members 10 and 20A to each other. In FIG. 2, a wedge 30 is used.
The wedge 30A shown in (c) and (d) may be used.

FIG. 4 shows another embodiment.
The first tubular member 10B and the second tubular member 20 are connected by a stopper ring 60. The stopper ring 60 is locked in a groove 70 provided on the inner peripheral surface of the first tubular member 10B. This stopper ring 60
Has an outer peripheral portion 62 and an inner peripheral portion 64 and has a vertical cross-sectional shape of a "S" shape. The stopper ring 60 is provided with a cut 66 so that when the stopper ring 60 is mounted in the first tubular member 10B, the diameter of the stopper ring 60 can be reduced.

In this embodiment, when the second tubular member 20 is inserted into the first tubular member 10B, the male screw 2
2 is inserted into the stopper ring 60 while sliding with the inner peripheral portion 64. When a force in the pull-out direction is applied to the second tubular member 20, the tip of the inner peripheral portion 64 bites into the male screw 22 and the pull-out is prevented. To remove the second tubular member 20, the second tubular member 20 may be rotated.

In FIGS. 4B and 4C, the tip of the inner peripheral portion 64 of the stopper ring 60 is flat in the circumferential direction, but as shown in FIG. 4D, the tip of the inner peripheral portion 64 is flat. A stopper ring 60A provided with a serrated portion 68 may be used.

In FIG. 5, a stopper ring 80 having a U-shaped cross section is used. The stopper ring 80 has an outer peripheral portion 82 and an inner peripheral portion 84, and when the water pressure is applied between the two, the inner peripheral portion 84 is strongly pressed against the male screw 22 and the second tubular member 20 is Omission is prevented. By rotating, the second tubular member 20 can be detached from the stopper ring 80 and pulled out of the first tubular member 10B. The stopper ring 80 is preferably made of synthetic resin or rubber. When the stopper ring 80 is made of a synthetic resin, the stopper ring 80 may be integrally formed with the first tubular member 10B.

FIG. 5 (b) shows an embodiment in which the tubular members 10B and 20 are connected to each other by a molded nut 82. The molding nut 82 is formed by attaching an uncured synthetic resin in the groove 70, inserting the tubular member 20, and curing the synthetic resin in a state where the male screw 22 is in contact with the synthetic resin. It was done. As the synthetic resin, a room temperature-curable synthetic resin, a light-curable synthetic resin, or the like can be used. When the synthetic resin is cured, the second tubular member 20 is prevented from being pulled out. Further, by turning the tubular member 20, it is possible to separate from the molded nut 82 and extract it.

FIG. 6 shows still another embodiment of the present invention, in which a first tubular member 90 is fixed to a counter 1 by a nut 4 and a first tubular member 90 is fixed to the first tubular member 90. Two tubular members 92 are inserted and connected. A female screw is provided on the inner peripheral surface on the lower end side of the first tubular member 90 in the figure, and a male screw is provided on the outer peripheral surface on the upper end side in the figure of the second tubular member 92.

The first tubular member 90 is provided with a plurality of slits 94 from the lower end in the figure, and a plurality of (four in the illustrated embodiment) flaps 96 are formed therefrom. The flap 96 is elastically deformable in a radial direction, and is urged in a centripetal direction by a C-ring 100 mounted in a groove 98. In order to prevent the elastic deformation of the flap 96 in the radial direction, a lock column 110 is externally fitted to the first tubular member 91. The lock column 110 is slidable along the outer peripheral surface of the first tubular member 90 in the vertical direction in the figure. This lock column 1
On the inner peripheral surface on the lower end side of 10, a step portion 112 that engages with the C-ring 100 is provided.

The second tubular member 92 is connected to the first tubular member 90
In order to connect the lock column 110 to the lock column 110 shown in FIG.
And the second tubular member 92 is inserted into the first tubular member 90. In this case, the second tubular member 92 advances upward in the figure while pushing the flap 96 outward. After sufficiently pushing the second tubular member 92 into the first tubular member 90, the lock column 110 is pushed down, and the C-ring 100 and the flap 96 are pressed down by the step 112 in the centripetal direction. Thereby, the female screw on the inner peripheral surface of the flap 96 and the male screw on the outer peripheral surface of the second tubular member 92 mesh with each other, and the second tubular member 92 is prevented from coming off.
The second tubular member 92 can be pulled out of the first tubular member 90 by turning it.

[0038]

As described above, according to the present invention, the two tubular members can be connected only by inserting the second tubular member into the first tubular member. By turning one or both after the connection is completed, both can be separated from each other.

[Brief description of the drawings]

FIG. 1 shows a configuration according to an embodiment,
(A) is a sectional view, (b) is a perspective view of the wedge 30, (c)
The figure is a perspective view of the wedge 30A, and the figure (d) is a sectional perspective view of the wedge 30A.

FIGS. 2A and 2B show an embodiment, in which FIG. 2A is a sectional view and FIG. 2B is a perspective view of a wedge 30B.

FIG. 3 is a sectional view showing an embodiment.

4 (a) is a sectional view, FIG. 4 (b) is a perspective view of a stopper ring 60, FIG. 4 (c) is a sectional perspective view of the stopper ring 60, and FIG. It is a sectional perspective view of 60 A of stopper rings.

5A and 5B show an embodiment, in which FIG. 5A is a sectional view of a connecting structure using a stopper ring 80, and FIG. 5B is a sectional view showing a connecting structure using a molded nut 82.

FIGS. 6A and 6B show an embodiment, in which FIG. 6A is a sectional view, and FIG. 6B is a perspective view of a first tubular member 90.

[Explanation of symbols]

 10, 10A, 10B First tubular member 12 Tubular member main body 14 Wedge holder 16 Tapered surface 20, 20A Second tubular member 30, 30A Wedge 34 Tapered surface 40 Spring 42, 44 O-ring 50 Lock nut 60, 60A, 80 Stopper ring 82 Molded nut 90 First tubular member 92 Second tubular member 94 Slit 96 Flap 98 Groove 100 C ring 110 Lock column (annular body)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H015 DA06 DA08 3J106 AB01 BA01 BB01 BC04 BD01 BE29 BE40 EA03 EB02 EC02 EC03 EC07 ED12 ED13 ED15 EE04 EE11 EE12 EF04 EF07 EF08

Claims (11)

[Claims] 1. A structure in which a second tubular member is inserted into a first tubular member, and the first and second tubular members are connected to each other by a male screw on an outer peripheral surface of the second tubular member. That the first tubular member and the second tubular member are connected by engaging an annular locking body held on the inner peripheral surface of the first tubular member with the male screw of the second tubular member; Characteristic connection structure of tubular members. 2. The tapered surface according to claim 1, wherein an inner peripheral surface of the first tubular member is provided with a tapered surface that is reduced in diameter in a direction in which the second tubular member is extracted. Is a connecting structure for a tubular member, wherein a tapered surface engaged with the tapered surface is provided. 3. A lock nut according to claim 2, wherein a lock nut for pressing the first and second tubular members in a separating direction in order to press the tapered surfaces together is screwed to the second tubular member. Connection structure of tubular members. 4. The connecting structure for a tubular member according to claim 2, wherein an elastic body is provided for pressing the locking body in a direction in which the second tubular member is pulled out. 5. The connection structure for a tubular member according to claim 1, wherein an urging member for urging the locking body in a radial direction is provided on the locking body. 6. The connecting structure for a tubular member according to claim 1, wherein an inner peripheral side of the locking body is elastically deformable in a centripetal direction. 7. The connection structure for a tubular member according to claim 6, wherein the locking member elastically abuts on the outer peripheral surface of the second tubular member by its own elastic force. 8. The device according to claim 6, wherein the locking member has a pressure receiving portion so as to be pressed against the outer peripheral surface of the second tubular member by the fluid pressure inside the first and second tubular members. A connection structure for a tubular member, characterized in that: 9. The connecting structure for a tubular member according to claim 1, wherein the locking member is formed by hardening the second tubular member after inserting the second tubular member into the first tubular member. 10. A structure in which a second tubular member is inserted into a first tubular member, and the first and second tubular members are connected to each other by a male screw on an outer peripheral surface of the second tubular member. A female screw engaged with the male screw is provided on an inner peripheral surface of the first tubular member, and a portion of the first tubular member provided with the female screw is elastically deformable outward, and the first tubular member is elastically deformable. A tubular member connecting structure, wherein an annular body for preventing the outward elastic deformation is attached to the tubular member. 11. The connection structure for a tubular member according to claim 10, wherein a slit is provided in the first tubular member so that the first tubular member can be elastically deformed outward.