JPH04133088U - pipe joint structure - Google Patents

Abstract

(57) [Summary] [Purpose] The connection can be easily performed and the tip of the insertion port can be prevented from being damaged even if compressive force is applied to the joint. [Structure] A buffer ring 8 is inserted between the tip end surface of the insertion port 7 and the rear end surface of the socket 6 to prevent damage to the insertion port 7 when compressive force is applied to the pipe joint. . A groove 7A is formed on the outer peripheral surface of the tip of the insertion port 7, and inside the groove 7A,
A lock ring is fitted to prevent the insertion port 7 from being pulled out by coming into contact with a protrusion 6A formed on the inner circumferential surface of the socket 6 when a tensile force is applied to the pipe joint. A sealing rubber ring 10 is inserted between the inner surface of the tip of the socket 6 and the outer peripheral surface of the insertion port 7.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was designed to improve the structure of pipe fittings, in particular, to make connections easy and to compress the pipe fittings. This relates to a pipe joint structure that prevents damage to the tip of the fitting even when force is applied. Ru.

0002

[Conventional technology]

An example of a conventional pipe joint structure will be described with reference to the drawings. FIG. 11 is a partial cross-sectional view of a conventional pipe joint structure. In FIG. 11, 1 is a socket, 2 is a socket inserted into the socket 1, and 3 is A rubber ring for sealing is inserted into the joint between socket 1 and socket 2, and 4 is , a bolt that is vertically screwed into the socket 1 and presses 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.

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 is to make the connection easy and to apply compressive force to the joint. It is an object of the present invention to provide a pipe joint structure that can prevent damage to the tip of a fitting even when the pipe is used.

0004

[Means to solve the problem]

This idea is suitable for pipe joint structures consisting of a socket inserted into a socket. , a compressive force is applied to the pipe joint between the tip end surface of the insertion port and the rear end surface of the socket. A buffer ring is inserted to prevent damage to the socket when the socket is used. A groove is formed on the outer circumferential surface of the tip of the tube, and a groove is formed in the groove when a tensile force is applied to the pipe joint. Sometimes, the socket may be pulled out by coming into contact with a protrusion formed on the inner peripheral surface of the socket. A lock ring is fitted to prevent A sealing rubber ring is inserted between the mouth and the outer circumferential surface of the mouth. It is.

[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. FIG. 3 is a partial cross-sectional view showing the state of the pipe fitting structure in FIG. 1 before connection. FIG. 4 is a partial cross-sectional view showing a state in progress of the pipe fitting in the pipe fitting structure shown in FIG. 1. Figure 5 is a partial cross-sectional view of the buffer ring in this invention when a tensile force is applied. 6 is a front view, FIG. 6 is a side view of the buffer ring in this invention, and FIG. 7 is A-A in FIG. 8 is a sectional view taken along line BB in FIG. 5, and FIG. 9 is a sectional view taken along line BB in FIG. FIG. 10 is a front view of the lock ring in this invention.

[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 peripheral surface of the socket 6, with which a lock ring to be described later comes into contact. has been done. At the rear of the socket 6, a protruding piece of a buffer ring (described later) is inserted into the socket 7. A stepped portion 6B is formed in the front to be pasted in advance. On the outer peripheral surface of the tip of the insertion port 7, A groove 7A into which the lock ring fits is formed.

[0007] As shown in FIGS. 5 to 8, 8 is made of an elastic material such as nylon. It is a buffer ring, and is inserted between the tip surface of the insertion port 7 and the rear end surface 6C of the socket 6. There is. The buffer ring 8 has a plurality of thin protrusions 8A on its outer peripheral surface. buffer Before inserting the socket 7 into the socket 6, the ring 8 is inserted into the socket 6 via the protruding piece 8A. It is pasted on the stepped section 6B. The inner diameter of the buffer ring 8 is the same as the socket 6 and the insertion port. 7, and the outer diameter is larger than the outer diameter of the insertion port 7. buffer A recess 8B is formed on the inner surface of the ring 8 to enhance the buffering effect. buffer The protruding piece 8A of the ring 8 may be formed continuously on the outer peripheral surface of the buffer ring 8.

[0008] As shown in Figures 9 and 10, 9 is a lock ring, which is inserted into the groove 7A of the insertion port 7. It's embedded. The lock ring 9 is made of FRP or spring material. , a notch 9A is formed in a part. 10 is a rubber ring for sealing, and the socket 6 is inserted between the inner surface of the tip and the outer peripheral surface of the insertion port 7.

[0009] 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. Attach protrusion 8A of buffer ring 8 to 6B with adhesive. Outer surface of buffer ring 8 Insert the lock ring 9 into 8C in advance in a stretched state. And receive Attach a rubber ring 10 to the inner surface of the tip of the mouth 6. Next, as shown in FIG. 3, the socket 7 is pushed into the socket 6. Furthermore, the insertion port 7 When pushed in, the tip of the insertion port 7 pushes the buffer ring 8, causing the protrusion of the buffer ring 8 to 8A is cut, and the buffer ring 8 comes into contact with the rear end surface 6C of the socket 6 together with the insertion port 7. It is pushed into the socket 6 until it is. At this time, the lock ring 9 is a buffer ring. Since only 8 is pushed into the socket 6, it comes off from the buffer ring 8 and is inserted into the groove 7A of the socket 7. Get stuck inside.

0010 In this way, as shown in FIG. The lock ring 9 is inserted between the rear end surface 6C of the outlet 6 and the lock ring 9 is fitted into the groove 7A of the insertion port 7. The rubber ring 10 is inserted between the inner surface of the tip of the receptacle 6 and the outer peripheral surface of the receptacle 7. inserted into.

[0011] When compressive force is applied to the pipe fitting of this invention, which is constructed in this way, the fitting The tip of 7 presses the rear end surface 6C of the socket 6 via the elastic buffer ring 8. Therefore, there is no risk that the tip of the insertion port 7 will be damaged. On the other hand, the pipe fitting When tension is applied, as shown in Figure 4, the lock ring moves as the insertion port 7 moves. 9 will move until it touches the protrusion 6A of the socket 6, and will not move any further, so insert it. The opening 7 is prevented from being pulled out from within the socket 6.

0012

[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. Even in the case of ground displacement due to earthquakes, etc., this displacement is suppressed by the action of the buffer ring 8. can follow. Even if a compressive force is applied to the pipe joint, the insertion port 7 will not be damaged due to the action of the buffer ring 8. can be prevented. Even if the joint is deformed due to ground displacement, etc., there is plenty of room in the joint, so There is no risk that the insertion port 7 will slip out from the socket 6.

[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 showing a state in which the pipe joint structure of FIG. 1 is in the middle of connection.

FIG. 4 is a partial cross-sectional view of the pipe joint structure of FIG. 1 when a tensile force is applied to the joint portion.

FIG. 5 is a front view of the buffer ring in this invention.

FIG. 6 is a side view of the buffer ring in this invention.

7 is a cross-sectional view taken along the line AA in FIG. 5. FIG.

8 is a sectional view taken along line BB in FIG. 5. FIG.

FIG. 9 is a perspective view of the lock ring in this invention.

FIG. 10 is a front view of the lock ring in this invention.

FIG. 11 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, 6B: Step of 6, 6C: Rear end of 6, 7: Socket, 7A: Groove of 7, 8: Buffer ring, 8A: Protrusion of 8 Piece, 8B: Recess of 8, 8C: Outer surface of 8, 9: Lock ring, 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] [Claim 1] In a pipe joint structure consisting of a socket inserted into a socket, there is a gap between the tip end face of the socket and the rear end face of the socket when compressive force is applied to the pipe joint. A buffer ring is inserted into the socket to prevent damage to the socket, and a groove is formed on the outer circumferential surface of the tip of the socket, and when a tensile force is applied to the pipe joint, the socket is inserted into the socket. A lock ring is fitted to prevent the socket from being pulled out by contacting a protrusion formed on the inner peripheral surface of the socket, and a sealing rubber is provided between the inner surface of the tip of the socket and the outer peripheral surface of the socket. A pipe joint structure characterized by an inserted ring.