JP2002039483A - Pipe connecting member and structure of pipe coupling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe connecting member and pipe coupling structure assuring simple operations to lay pipings and a high anti-seismic property. SOLUTION: The invention includes a pipe coupling structure and a flexible connection pipe 3 mounted on a pipe coupling 1 for connecting a branch pipe 9, wherein the base end of the flexible connection pipe 3 is enlarged diametrically to form a socket 31 to be fitted on a cylindrical connection part 23 of the pipe fitting 1, and a circumferential lip 32 is provided on the inside surface of the flexible connection pipe 3 at its forefront part, and at the base of this lip 32, the peripheral edge of the pipe 3 is extended to form a riser part 34, and a ring 5 to press the lip 32 is fitted in a ring fitting groove 33 provided circumferentially on the lip 32. This pipe coupling structure allows omitting any process to fasten the branch pipe 9 with a band, etc., for preventing its slipping off, and when tremors have occurred due to an earthquake, etc., the riser part 34 contacts with the peripheral wall of the branch pipe to restrict dislocation of the connection pipe 3 from the branch pipe 9 so that the branch pipe 9 is prevented from slipping off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for pipes such as sewer pipes, especially pipe joints for connecting main pipes and branch pipes, drainage ports and inspection ports, etc. The present invention relates to a pipe joint and a masque that can prevent damage to pipes or pipes connected to each other due to an earthquake displacement.

[0002]

2. Description of the Related Art Saddle T-type pipe joints are used, for example, to connect a sewer main pipe (hereinafter referred to as a main pipe) to a branch pipe in a pipe of a sewer pipe. The joint (72) was formed of a flexible material so that the main pipe and the branch pipe would not be damaged even if there was a mutation due to an earthquake or the like in the pipe joint, or a bellows structure as shown in FIG. Are provided (JP-A-10-30779, JP-A-11-10828).
0).

[0003] These pipe joints (71) are connected to a branch pipe by an earthquake or the like.
When (9) swings, the joint (72) bends to prevent the connection portion from being damaged.However, the joint (72) repeatedly bends, and the branch pipe (9) shifts or comes off. In order to prevent such a situation, the joint portion (72) and the branch pipe (9) had to be firmly fixed with a fixing band (73) or the like.

[0004]

However, there are many narrow places at the piping site such as a sewer pipe, and a fixing band (73) and the like are connected to a pipe joint (71).
It is very difficult and time-consuming to mount it at a predetermined location and fasten it with bolts and nuts. Such a problem is not limited to a pipe joint for connecting a main pipe and a branch pipe, but also applies to a case where a pipe is connected to a pipe or a case where a pipe is connected.

[0005]

According to the present invention, a receiving step (23A) for receiving a branch pipe (9) on an inner periphery thereof is provided in order to solve the above problems.
A flexible connecting pipe (3) attached to a joint (22) having a tubular connecting part (23) formed with a flexible connecting pipe (3) for connecting a branch pipe (9). ) Is set to be slightly larger than the outer diameter of the branch pipe (9), and the proximal end of the flexible connection pipe (3) is expanded in diameter and fitted to the outside of the cylindrical connection section (23). Receiving part (31)
A lip (32) is provided around the inner periphery of the distal end of the flexible connection pipe (3), and the periphery of the flexible connection pipe (3) is formed at the base of the lip (32). A rising portion (34) is formed by extension, and a ring (5) for pressing the lip (32) is fitted into a ring fitting groove (33) provided around the outer periphery of the lip (32). A flexible connection tube (3) is provided.
Further, a saddle portion (21) as an attachment portion of the main pipe (8) and the saddle portion
A pipe joint body consisting of a joint part (22) delivered from (21)
(2) wherein the joint portion (22) of the pipe joint body (2) has a stepped portion (23A) having an enlarged diameter at its end and receiving a branch pipe (9) on its inner periphery. The present invention provides a pipe joint (1) in which a tubular connecting portion (23) is formed, and the flexible connecting pipe (3) according to claim 1 is attached to the tubular connecting portion (23). Also body (61)
And a pipe connecting part (62) protruding from the main body (61). (6) At least one end of the pipe connecting part (62) has an inner diameter which is enlarged at an end. A tubular connecting portion having a receiving step portion for receiving a pipe is formed in the tubular connecting portion, and the flexible connecting pipe (3) according to claim 1 is attached to the tubular connecting portion.
(6). In the connection structure between the pipe (8) and the pipe joint (1) into which the pipe (9) is inserted, the pipe joint (1)
Is a joint part (22) having a cylindrical connection part (23) and a flexible connection pipe.
The base end of the flexible connection pipe (3) is expanded in diameter, and the cylindrical connection part (23) of the joint part (1) is fitted to the expanded diameter part. The cylindrical connecting portion (23) has a receiving step (23A) for receiving the pipe (9) on the inner periphery at the inner end, and is provided inside the distal end of the flexible connecting pipe (3). A lip (32) is provided around the periphery, and the lip
At the base of (32), the periphery of the flexible connecting pipe is extended to form a rising portion (34), and the ring fitting groove (33) provided around the outer periphery of the lip (32) A pipe joint structure is provided in which a ring (5) for pressing a lip (32) is fitted.

[0006]

In the pipe joint structure of the present invention, when there is a shaking due to an earthquake or the like, the branch pipe (9) is connected to the ring (5) fitted in the ring fitting groove (33) as shown in FIG. Swings as a fulcrum, with a flexible connecting tube at the base of the lip (32).
Since the rising portion (34) is extended on the periphery of (3), the rising portion (34) comes into contact with the peripheral wall of the branch pipe and the flexible connection pipe (3)
And the displacement of the branch pipe (9) is restricted to prevent the branch pipe (9) from coming off.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIGS. Pipe fitting (1) shown in FIG.
Is the fitting body (2), flexible connecting pipe (3) and fixing ring (4)
And a ring (5). The pipe joint body (2) is made of a synthetic resin such as polyvinyl chloride, polyethylene, or polypropylene, and is a rectangular plate having an opening (25) in the center as shown in FIG. 8) An arc-shaped saddle portion (21) having a curvature adapted to the outer peripheral curved surface shape, and a cylindrical joint portion (22) inserted from an opening of the saddle portion (21). .

As shown in FIG. 3, the end of the joint portion (22) is enlarged in diameter to form a cylindrical connecting portion (23). The cylindrical connection part (2
The inner peripheral wall of (3) is tapered so that the diameter increases toward the tip, and a receiving step (23A) for receiving the branch pipe (9) is formed at the inner end, and the receiving step (23A) is formed. inside diameter d ₁ of) is set substantially equal to the outer diameter d ₂ of the branch pipe to be inserted (9). Further, two concave grooves (23B, 23B) are provided on the outer periphery of the cylindrical connecting portion (23). Also, the joint portion is provided on the inner surface of the saddle portion (21).
The base of (22) is extended to form a flange (24). A rib (21A) is formed at the longitudinal edge of the saddle portion, and the rib (21A) is further provided with a pair of notches (21B).

The flexible connecting pipe (3) is composed of a cylindrical body (35) made of rubber or elastomer such as SBR, and the inner diameter of the flexible connecting pipe (3) is equal to the outer diameter of the branch pipe (9). One end is enlarged in diameter as shown in FIG. 4 to fit into the outside of the cylindrical connection part (23) of the joint part (22) of the pipe joint body (2). A part (31) is formed. The end of the socket (31) is bent inward to form a flange (31A), and the inner periphery is fitted into a concave groove (23B) provided on the outer periphery of the cylindrical connecting portion (23). A protruding ridge (31B) is provided circumferentially, and a lip portion (31D) is provided circumferentially at the inner rear end. A fixing ring mounting groove (31C) is provided around the outer periphery.

A lip portion (32) is provided around the inner periphery of the other end of the flexible connection pipe (3), and a ring fitting groove (33) is provided on the outer periphery of the lip portion (32). Is provided, and a rising portion (34) is extended from a base of the lip portion (32). The rising part
(34) The length is 15mm to 30mm from the point of securing earthquake resistance
It is desirable that The length of the rising portion (34) is 15
If it is smaller than mm, the contact area between the branch pipe (9) and the rising portion (34) is insufficient, so that the branch pipe (9) is easily displaced, and if it exceeds 30 mm, the earthquake resistance is not so much improved. The hardness of rubber or elastomer is determined by JISA from the viewpoint of flexibility and strength.
It is desirable in H _A is about 55 to 70.

The fixing ring (4) shown in FIG. 5 is, for example, a ring made of synthetic resin or metal. The fixing ring (4) has one end opened, and both ends of the opening (46) are bent at right angles. A pair of bolt fastening portions (42) having bolt holes (43, 43) in the center are formed. The ring (5) shown in FIG. 6 is a ring made of a synthetic resin, and is preferably made of a flexible synthetic resin such as polyvinyl chloride, polyethylene, or polypropylene from the viewpoint of easy fitting.

In order to use the pipe joint (1), first, as shown in FIGS. 7 and 8, the socket (31) of the flexible connection pipe (3) is connected to the joint part of the pipe joint body (2). It is fitted and attached to the cylindrical connection part (23) of (22). At this time, since the flexible connection tube (3) is made of rubber or elastomer, the receiving portion (31) is also elastic and can be easily fitted. A lip (31D) provided at the back end of the base of the socket (31) fits into the distal end of the cylindrical connecting portion (23), and a protrusion provided on the inner periphery of the socket (31). Article (31B, 3
1B) and the grooves (23B, 23B) provided in the joint portion (23) are fitted, so that the flexible connection pipe (3) is fitted accurately, and is securely held even after the fitting.

Further, as shown in FIGS. 9 and 10, a fixing ring (4) is mounted on a fixing ring mounting groove (31C) provided around the outer periphery of the receiving portion (31) of the flexible connection pipe (3). Bolt hole (43)
And tighten with bolts (44) and nuts (45). In addition, a ring is inserted into the ring fitting groove (33) of the flexible connecting pipe (3).
(5) is fitted. The ring (5) is made of synthetic resin and has flexibility, so that it can be easily fitted by pushing it. The work up to this point may be performed on site, but if it is performed in advance at a factory or the like, the workability at the site can be improved.

In order to connect the main pipe (8) and the branch pipe (9) using the pipe joint (1) assembled in this manner, a branch pipe is mounted on the main pipe (8) according to the situation at the site. Determine the receiving position of (9), make a hole the same or slightly larger than the outside diameter of the flange (24) of the fitting (1), and fit the flange of the fitting (1) into the hole thus drilled.
(24) is interpolated. At this time, the flange (24) prevents the main pipe (8) from being displaced from the pipe joint (1), and also secures the connection between the main pipe (8) and the branch pipe (9) to prevent water leakage. .
Then, the saddle portion (2) of the pipe joint (1) is brought into contact with the outer surface of the main pipe (8) and bonded with a bonding agent or an adhesive. At that time, it is fixed by a band (81) or a clamp until the bonding is completed. Bands (81) and clamps engage with the notches (21B) to facilitate fixing of the pipe joint (1) to the main pipe (8).

The branch pipe (9) is inserted into the flexible connection pipe (3) of the pipe joint (1) attached to the main pipe (8) in this manner.
At this time, since the rising portion (34) extends straight from the cylindrical body (35), a gap is secured between the rising portion (34) and the pipe wall of the branch pipe (9) to be inserted, and the rising portion (34) is branched. No obstruction during tube insertion. In addition, the lip portion (32) enables accurate and easy alignment of the tube axis. Further, the lip (34) is a branch pipe.
(9) and the sealing property of the flexible connection pipe (3) are improved. The inserted branch pipe (9) is received by the receiving step (23A) of the tubular connecting part (23). The inner diameter d ₁ of the receiving step (23A) is a branch pipe.
(9) is set to be approximately equal to the outer diameter d _{2 of the} branch pipe (9).
At the time of connection, the tip of the branch pipe (9) is prevented from shifting left and right, and a smooth pipeline can be formed. The lip portion (31D) of the receiving portion (31) prevents the tip of the branch pipe (9) from shifting left and right during normal use. Further, the inner peripheral wall of the cylindrical connecting portion (23) has a tapered shape whose diameter increases toward the tip, so that in the event of an earthquake or the like, the tip of the inserted branch pipe (9) follows the swing. To prevent damage to the pipe joint (1), main pipe (8) and branch pipe (9).

The branch pipe 9 swings with the ring 5 as a fulcrum when the lip 32 is pressed against a side wall by the ring 5 when the branch pipe 9 is shaken by an earthquake or the like. Then, as shown in FIG. 14, when the swing angle increases, the rising portion (3
4) contacts the branch pipe wall at point P to prevent the branch pipe (14) from shifting in the front-rear direction. Also, the larger the deflection angle, the larger the contact area between the branch pipe (9) and the rising portion (34), so that the branch pipe (9) is effectively prevented from coming off.

The pipe joint of the present invention is not limited to the above embodiment. For example, the saddle portion of the pipe joint body has an elliptical or oval planar projection shape, and the joint portion is eccentrically protruded. Is also good. Further, a rib may be provided on the peripheral body of the joint for reinforcing the strength, and the pipe joint body may be made of metal, ceramic, or the like without being limited to synthetic resin.

Further, in the flexible connection pipe of the present invention, the rising portion does not necessarily need to be formed over the entire circumference, and the rising portion (36) may be formed intermittently as shown in FIG. In addition, as shown in FIG.
A non-slip light adhesive layer (38) may be provided inside 7).

The pipe joint structure of the present invention is not limited to the pipe joint, but may be applied to, for example, a pipe connection portion of a public sculpture or a drainage gutter shown in FIG. Fig. 17
In (6), a flexible connecting pipe is applied to a pipe connecting portion (62) on the upstream side of a main body (61).

Further, the pipe joint structure of the present invention may be applied to a connection between pipes, in which case one end of the pipe is enlarged in diameter to form a cylindrical connection having a receiving step. The flexible connecting pipe of the present embodiment may be formed and applied, or one end of a pipe made of a flexible material may be used as a tubular connecting portion and the flexible connecting pipe of the present embodiment. They may be formed integrally.

In this embodiment, the joint between the flexible connection pipe and the pipe joint body is fixed by tightening a fixing ring having an opening with a bolt and a nut. For example, a ring made of synthetic resin is attached. For example, a metal clamp or a synthetic fiber belt may be used.

[0022]

According to the pipe joint structure of the present invention, since the ring (5) made of synthetic resin may be previously fitted in the ring fitting groove (33), the branch pipe (9) is inserted at the construction site. After the branch pipe
(9) The trouble of tightening and fixing with a fixing band or the like can be eliminated in order to prevent detachment. In the case of rocking due to an earthquake or the like, the rising portion extended to the periphery of the tip of the flexible connecting pipe
(34) comes into contact with the peripheral wall of the branch pipe, and the flexible connecting pipe (3) and the branch pipe (9)
To prevent the branch pipe (9) from coming off.

If the pipe joint structure of the present invention is applied to a flexible connecting pipe, a pipe joint, and a masque, etc., it is possible to connect in series and to improve the seismic resistance of a branch pipe joint in all directions and a square.

[Brief description of the drawings]

 1 to 14 show an embodiment of the present invention.

FIG. 1 is a perspective view of a pipe joint.

FIG. 2 is a plan view of a pipe joint body.

FIG. 3 is a sectional view of a pipe joint body.

FIG. 4 is a side sectional view of a flexible connection pipe.

FIG. 5 is a perspective view of a fixing ring.

FIG. 6 is a perspective view of a ring.

FIG. 7 is a side sectional view showing a state immediately before fitting of a flexible connection pipe to a pipe joint body.

FIG. 8 is a side sectional view showing a state in which a flexible connection pipe is fitted to a pipe joint body.

FIG. 9 is a side view of the flexible connection pipe with the fixing ring attached.

FIG. 10 is a perspective view showing a state immediately before a ring is fitted.

FIG. 11 is a side sectional view showing a state in which a ring and a fixing ring are attached to a flexible connection pipe.

FIG. 12 is a perspective view of a pipe joint immediately before branch pipe insertion.

FIG. 13 is a side sectional view of a pipe joint in a state where a branch pipe is inserted.

FIG. 14 is a side sectional view of a branch pipe rocking state.

FIG. 15 is a perspective view of a flexible connection pipe of another embodiment.

FIG. 16 is a perspective view of a flexible connection pipe of still another embodiment.

FIG. 17 is an increasingly side view of another embodiment.

FIG. 18 is a perspective view of a conventional pipe joint.

[Explanation of symbols]

 1 Fitting 2 Fitting body 3 Flexible connecting pipe 6 8 Main pipe 9 Branch pipe 21 Saddle section 22 Joint section 23 Cylindrical connecting section 23A Receiving step 31 Receiving section 32 Lip section 33 Ring fitting groove 34 Rising section 61

Claims (4)

[Claims] 1. A flexible connecting pipe attached to a pipe joint having a tubular connecting portion having a receiving step formed therein for receiving a branch pipe on an inner periphery thereof and connecting the branch pipe. The inner diameter of the flexible connecting pipe is set to be slightly larger than the outer diameter of the branch pipe, and the base end of the flexible connecting pipe is expanded in diameter and has a receiving portion fitted to the outside of the cylindrical connecting portion. A lip portion is provided around the inner periphery of the distal end portion of the flexible connection tube, and a peripheral portion of the flexible connection tube is extended at a base portion of the lip portion to form a rising portion. A flexible connection pipe, wherein a ring for pressing the lip portion is fitted in a ring fitting groove provided around the outer periphery. 2. A pipe joint body comprising a saddle part as a main pipe mounting part and a joint part extended from the saddle part,
The joint portion of the pipe joint body has an enlarged diameter at its end, and a tubular connecting portion having a receiving step portion for receiving a branch pipe is formed on an inner periphery thereof, and the tubular connecting portion according to claim 1. A pipe joint to which a flexible connecting pipe is connected. 3. A masque comprising a main body and a pipe connecting portion protruding from the main body, wherein at least one end of the pipe connecting portion has an enlarged end and receives a pipe on an inner periphery. A tubular connecting portion having a receiving step portion is formed, and the flexible connecting pipe according to claim 1 is connected to the tubular connecting portion. 4. A connection structure between a pipe and a pipe joint into which the pipe is inserted, the pipe joint comprising a joint portion having a cylindrical connection portion and a flexible connection tube, and a base of the flexible connection tube. The end portion is enlarged in diameter, and the cylindrical connection portion of the joint portion is fitted to the enlarged diameter portion, and the cylindrical connection portion has a receiving step portion for receiving a pipe on the inner periphery at the back end. A lip portion is provided around an inner periphery of a distal end portion of the flexible connection tube, and a peripheral portion of the flexible connection tube is extended at a base portion of the lip portion to form a rising portion; A pipe fitting structure, wherein a ring for pressing the lip portion is fitted in a ring fitting groove provided around the outer periphery of the outer periphery of the pipe.