JPH04133093U - pipe joint structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pipe joint structure that allows easy connection. [Structure] In a pipe joint structure consisting of a socket 7 inserted into a socket 6, a groove 7A is formed on the outer peripheral surface of the tip of the socket 6.
is formed, and between the groove 7A and the inner peripheral surface of the socket 6, a highly elastic retaining material 9 is attached to the outer peripheral surface of the socket 6.
A lock ring 8 having a tapered inner surface 8B of the distal end of the socket 6 is fitted into the lock ring 8, and the inner circumferential surface of the distal end of the socket 6 and the socket 7 are fitted together.
A sealing rubber ring 10 is inserted between the outer circumferential surface of When a tensile force is applied to the pipe joint, the lock ring 8 comes into contact with a protrusion 6A formed on the inner circumferential surface of the socket 6 to prevent the socket 7 from being pulled out.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to pipe joint structures, especially pipe joint structures that allow easy connection. It is.

0002

[Conventional technology]

An example of a conventional pipe joint structure will be described with reference to the drawings. FIG. 6 is a partial cross-sectional view of a conventional pipe joint structure. In FIG. 6, 1 is a socket, 2 is a socket inserted into the socket 1, and 3 is A sealing rubber ring inserted into the pipe joint between socket 1 and insertion port 2, and 4 is a bolt that is vertically screwed into the socket 1 and presses against the outer peripheral surface of the socket 2 through the elastic material 5. By tightening the bolt 4, the socket 1 and the socket 2 are connected to each other. connected to.

0003

[Problem that the idea aims to solve]

However, the conventional pipe joint structure described above has the following problems. Ru. When connecting the pipes, it is necessary to tighten the bolts 4. Since the insertion port 2 is pressed by the bolt 4, the degree of freedom of the joint portion is reduced. As a result, even if the ground is displaced due to an earthquake or the like, it will not be able to follow this displacement. If the joint is deformed due to ground displacement, etc., the tightening force of the bolt 4 will be low. As a result, there is a possibility that the insertion port 2 may fall out from the socket 1. In the case of underground piping, space is required to tighten bolt 4, and extra excavation will be required. Therefore, the purpose of this invention was to make the connection easy, have a large degree of freedom at the joint, and To provide a pipe joint structure that can easily follow the position of the pipe and also allows easy bending of piping. It's there.

0004

[Means to solve the problem]

This idea is suitable for pipe joint structures consisting of a socket inserted into a socket. , a groove is formed on the outer circumferential surface of the tip of the socket, and between the groove and the inner circumferential surface of the socket; A lock ring with highly elastic retaining material attached to the outer circumferential surface is fitted into the , the inner surface of the tip side end of the socket of the lock ring is formed in a tapered shape, A sealing rubber ring is inserted between the inner circumferential surface of the tip of the socket and the outer circumferential surface of the insertion port. and when a tensile force is applied to the pipe joint, the lock ring is inserted into the socket. The feature is that it comes into contact with a protrusion formed on the inner circumferential surface and prevents the insertion port from being pulled out. It has the following.

[0005] Next, one embodiment of the pipe joint structure of this invention will be described with reference to the drawings. FIG. 1 is a partial sectional view showing an embodiment of the pipe joint structure of this invention, and FIG. Figure 3 is a partial cross-sectional view showing the state of the pipe fitting structure in Figure 1 before connection. Figure 4 is a partial cross-sectional view when a tensile force is applied to the joint. Figure 5 is a side view of the lock ring in this invention. Ru.

[0006] In FIG. 1, 6 is a receptacle, and 7 is an insertion port inserted into the receptacle 6. A protrusion 6A is formed in the center of the inner circumferential surface of the socket 6, with which a lock ring to be described later comes into contact. has been done. On the outer peripheral surface of the tip of the insertion port 7, there is a groove 7A into which the lock ring is fitted. It is formed.

[0007] As shown in FIGS. 4 and 5, 8 is a lock ring, and its outer peripheral surface has A plurality of highly elastic holding materials 9 are attached to the groove 7A of the insertion opening 7 and the inside of the socket 6. It is fitted between the surrounding surface. Lock ring 8 is made of FRP or spring material, etc. A notch 8A is formed in a part, which gives spring force. . The inner surface 8B of the tip side end of the socket 6 of the lock ring 8 is formed into a tapered shape. . The reason why the inner surface 8B of the end portion is tapered is that it is suitable for inserting the insertion port 7 into the socket 6. This is to make it easier for the lock ring 8 to expand by the tip of the insertion port 7. The holding material 9 is made of highly elastic sponge or spring, and is Before inserting the port 7, attach the lock ring 8 to the inner peripheral surface of the socket 6 concentrically with this. It has the effect of When the holding material 9 is made of sponge, the holding material 9 is made of a rod. It may be provided around the entire circumference of the ring 8. 10 is a rubber ring for sealing, and the end of the socket 6 It is inserted between the end inner surface and the outer peripheral surface of the insertion port 7.

[0008] In the pipe joint structure of this invention constructed in this way, the following steps are taken. Then, the socket 6 and the socket 7 are connected to each other. That is, as shown in FIG. The lock ring 8 with the material 9 attached to the outer circumferential surface is fitted into the inner surface of the rear end of the socket 6. Then, fit the rubber ring 10 into the inner surface of the tip of the socket 6. These are, respectively, This is done in advance before inserting the insertion port 7. When fitting the lock ring 8, be sure to The plug 8 is fitted into the inner surface of the rear end of the socket 6 in a reduced diameter state. Fitted into the socket 6 The lock ring 8 expands in diameter due to elastic force, so it cannot be moved to the fixed position in the socket 6. It is retained somewhat. Next, the lock ring 8 is inserted into the socket 7 and the lock ring 8 is inserted into the socket 6. Insert it until it fits into the groove 7A. This allows the receptacle 6 and the insertion port 7 to be interchanged. connected to. At this time, the end inner surface 8B of the lock ring 8 is formed into a tapered shape. Moreover, since it is placed concentrically with the socket 6 by the retainer 9, the locking The ring 8 smoothly expands in diameter and fits into the groove 7A of the socket 6.

[0009] When a tensile force is applied to the pipe joint, as shown in Fig. 3, the insertion port 7 moves and Both move until the lock ring 8 comes into contact with the protrusion 6A of the socket 6, and cannot be moved any further. Since it does not move, the insertion port 7 is reliably prevented from being pulled out.

0010

[Effect of the idea]

As explained above, this invention brings about the following useful effects: It will be done. The insertion port 7 and the socket 6 can be easily connected by simply pushing the insertion port 7 into the socket 6. I can continue. Even if tensile force is applied to the pipe joint due to an increase in internal pressure, the lock ring 9 This action prevents the insertion port 7 from slipping out from the socket 6. Since there is a space in the joint, there is a large degree of freedom in the pipe joint, and it can easily follow displacement. Easy to bend and bend piping.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing one embodiment of the pipe joint structure of this invention.

FIG. 2 is a partial sectional view showing the state of the pipe joint structure in FIG. 1 before connection.

FIG. 3 is a partial cross-sectional view of the pipe joint structure of FIG. 1 when a tensile force is applied to the joint.

FIG. 4 is a perspective view of the lock ring in this invention.

FIG. 5 is a side view of the lock ring in this invention.

FIG. 6 is a partial cross-sectional view showing a conventional pipe joint structure.

[Explanation of symbols]

1: socket, 2: insertion port, 3: rubber ring, 4: bolt,
5: Elastic material, 6: Socket, 6A: Protrusion of 6, 7: Socket,
7A: 7 groove, 8: Lock ring, 8A: 8 notch, 8B:
End inner surface of 8, 9: Holding material, 10: Rubber ring.

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Hiroshi Ishida 3-16-9 Uchikanda, Chiyoda-ku, Tokyo Within Honchu Tetsukan Co., Ltd. (72) Creator Toshiyuki Yonezu 3-16-9 Uchikanda, Chiyoda-ku, Tokyo Within Honchu Tetsukan Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A pipe joint structure comprising a socket inserted into a socket, wherein a groove is formed on the outer circumferential surface of the distal end of the socket, and between the groove and the inner peripheral surface of the socket,
A lock ring having a highly elastic retaining material attached to its outer peripheral surface is fitted, and the inner surface of the end of the lock ring on the distal end side of the socket is formed into a tapered shape, and the inner peripheral surface of the distal end of the socket and the socket are formed in a tapered shape. A sealing rubber ring is inserted between the outer circumferential surface of the pipe joint, and when a tensile force is applied to the pipe joint, the lock ring comes into contact with a protrusion formed on the inner circumferential surface of the socket, and the lock ring is inserted into the socket. Pipe joint structure characterized by preventing the opening from being pulled out.