JPH04219586A - Branch pipe coupling and method for connecting the same to main pipe - Google Patents

Abstract

PURPOSE:To enhance workability, water sealing property and strength so as to surely prevent removal of a socket short pipe by adjusting an engaging position between uneven engaging portions with rotation of an operating ring in fixing a socket short pipe to a fixing port of a main pipe. CONSTITUTION:In a branch pipe coupling 10 where a socket short pipe 12 for connecting a branch pipe is fixed to a fixing port 11A disposed in a main pipe 11, a locking portion 21 capable of being locked in the inner surface of the circumferential edge portion of the fixing port 11A is provided at the distal end of the socket short pipe 12. A saddle 13 is disposed in the outer peripheral portion of the socket short pipe 12 positioned on an outer area side of the circumferential edge portion of the fixing port 11A. A rubber ring 14 facing the inner diameter portion of the fixing port 11A with a clearance larger than a thickness of the main pipe 11 is interposed between the outer peripheral portion of the socket short pipe 12 and the saddle 13, where a rotatable operating ring 15 is disposed. An engaging position between an uneven engaging portion 15A and another uneven engaging portion 18A formed in a thrust receiving portion 18 on the socket short pipe 12 side or saddle 13 is adjusted with rotation of the operating ring 15. Therefore, the locking portion 21 of the socket short pipe 12 can be lifted up and the rubber ring 14 can be compressibly deformed, to be press-fitted to the inner diameter portion of the fixing port 11A.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch pipe joint and a method for connecting the branch pipe joint to a master pipe.

0002

[Prior Art] In a conventional branch pipe joint, when attaching a short socket pipe for connecting a branch pipe to an attachment port provided on a main pipe, a saddle is glued to the outer circumference of the main pipe so as to tightly fit it. , a short socket pipe is attached to this saddle.

[0003] In other conventional branch pipe joints,
A caulking material is filled between the outer periphery of the above-mentioned original pipe and the saddle to improve water-stopping properties.

0004

[Problems to be Solved by the Invention] However, the above-mentioned conventional technology constructs a branch pipe joint using a wet attachment method using adhesive, which has poor workability, and it is difficult to improve water-stopping properties and strength. There is a limit.

[0005] Furthermore, when the original pipe has ribs on the outer periphery of the pipe body, in order to ensure high water-stopping properties, it is necessary to fit the saddle closely along the complicated rib shape, making the construction complicated. Become.

[0006] In the conventional branch pipe joint, in order to construct the branch pipe joint by a dry installation method that does not use adhesive, the tip of the short pipe is inserted into the rubber ring provided at the connection port of the original pipe. There is also a type that press-fits the pipe, but there is a concern that the short pipe may come off.

[0007] The present invention improves workability, improves water-stopping properties and strength, and reliably prevents detachment of the short socket pipe when attaching the short socket pipe to the attachment port of the original pipe. The purpose is to

Furthermore, even if the original pipe has ribs on the outer periphery of the pipe main body, the present invention has a simple structure that improves workability, water-stopping properties, and strength. The purpose is to reliably prevent the short pipe from coming off.

Another object of the present invention is to reliably and easily attach a branch pipe joint to a fitting opening of a master pipe.

0010

[Means for Solving the Problems] The present invention as set forth in claim 1 provides a branch pipe joint in which a short socket pipe for connecting a branch pipe is attached to a fitting port provided in the main pipe. A locking part that can be locked to the inner surface of the socket periphery is provided at the tip of the short socket pipe located on the inner surface side of the socket periphery, and the locking part is located on the outside surface of the socket periphery in the original pipe. A saddle that is in contact with the outer surface of the peripheral edge of the socket is attached to the outer periphery of the short socket pipe, and between the locking part and the saddle mounting part on the outer periphery of the short socket pipe,
A rotatable operating ring is fitted with a rubber ring that faces the inner diameter of the attachment port of the source tube with a width greater than the thickness of the source tube, and is located between the thrust receiver provided on the outer periphery of the short port tube and the saddle. is interposed, and the engagement position between the concave-convex engaging portion provided on the operating ring and the concave-convex engaging portion provided on the thrust receiving portion on the short pipe side of the socket or the saddle is adjusted by rotating the operating ring. Accordingly, the locking portion of the short socket tube is pulled up with respect to the original tube and the saddle, and the rubber ring is compressed and deformed to be crimped onto the inner diameter portion of the attachment port.

[0011] In the present invention as set forth in claim 2, the original tube has a rib on the outer periphery of the tube main body, and the saddle has a seating surface that follows the shape of the rib, and the saddle has a mounting opening in the original tube. It is designed to be attached to the outer surface of the peripheral portion.

[0012] The present invention according to claim 3 provides the following method for attaching the branch pipe joint according to claim 1 to a fitting opening provided in the original pipe.
This is a method for connecting a branch pipe joint to a master pipe, which consists of the following steps.

(2) One of the locking parts provided at the tip of the short socket tube is inserted and locked into the inner surface of the top of the tube at the periphery of the fitting opening of the original tube.

■ Press the other locking part on the opposite side to the inserted locking part by pressing the socket short pipe, and press the other locking part on the side opposite to the inserted locking part. Locks on the inner surface of the top of the tube.

■ By rotating the operating ring around the axis of the short socket pipe, the locking part of the short socket pipe is pulled up against the original pipe and the saddle, and the rubber ring is compressed and deformed to adjust the inner diameter of the socket. Crimp the part.

[0016] In the present invention as set forth in claim 4, at least one of the locking portions provided at the tip of the short socket tube is formed to protrude with a larger dimension than the other locking portions, and in First, the locking portion having the large protruding size is inserted into the inner surface of the peripheral edge of the fitting opening of the original pipe and is locked therein.

[0017]

[Operation] According to the present invention as set forth in claim 1, the following
There is an effect.

■By rotating the operation ring, the rubber ring provided on the outer periphery of the short socket tube is compressed and deformed, and is crimped onto the inner diameter of the connection port of the original tube.It is a dry method that does not use adhesive. Because it is an attached method, it has good workability and can improve water-stopping properties and strength.

(2) Since the locking portion provided at the tip of the short socket tube can be locked onto the inner surface of the peripheral edge of the socket, there is no fear that the short socket tube will come off.

According to the present invention as set forth in claim 2, the following
There is an effect.

■Even if the original tube has ribs on the outer periphery of the tube body, high water-stopping properties can be ensured by the above-mentioned method (■).In order to ensure high water-stopping properties, the saddle can be placed along the complicated rib shape. There is no need for complicated construction such as making them stick together. Therefore, with a simple configuration, it is possible to improve workability, improve water-stopping properties and strength, and reliably prevent detachment of the short socket pipe.

According to the present invention as set forth in claim 3, the following
There is an effect.

■ Insert and lock one locking part into the inner surface of the peripheral edge of the socket, then press the short pipe of the socket and insert the other locking part into the inner surface of the peripheral edge of the socket. Since it is locked by being pushed into the side, the amount of pushing deformation of the other locking part relative to the attachment opening is approximately halved, and the locking part can be pushed and inserted using the principle of leverage. Therefore, while keeping the protrusion dimension of the locking part as necessary and sufficient, the locking part can be inserted and locked into the inner surface of the socket reliably and easily, and the short pipe can be reliably and easily locked without fear of detachment. Can be attached to.

According to the present invention as set forth in claim 4, the following
There is an effect.

■ At least one of the locking portions is given a large protruding dimension, and this locking portion with the large protruding size is first inserted and locked into the inner surface of the peripheral edge of the mounting opening, so that the installation is easy. While the other locking part can be easily pushed and inserted into the mounting opening, the locking state of the locking part with respect to the mounting opening can be made more reliable overall.

[0026]

[Embodiment] Fig. 1 is a sectional view of main parts showing a branch pipe joint according to a first embodiment of the present invention, Fig. 2 is an exploded view showing the components of the branch pipe joint of Fig. FIG. 4 is an end view showing the shape of the tip end of the short-mouth tube. FIG. 4 is a schematic diagram showing the engagement state between the concave-convex engaging portion of the operation ring and the concave-convex engaging portion of the thrust receiving portion. FIG. 5 is a third embodiment of the present invention. FIG. 6 is a cross-sectional view showing the positioning structure of the saddle and the small-diameter neck of the short socket pipe, and FIG. 7 is a short cross-sectional view of the short socket pipe according to the second embodiment of the present invention. FIG. 8 is a process diagram showing an example of a method for connecting a branch pipe joint according to the present invention.

(First Embodiment) The branch pipe joint 10 is shown in FIG.
As shown in FIG. 2, a short socket pipe 12 for connecting a branch pipe is attached to a fitting port 11A provided in a main pipe 11 such as a Hume pipe or a PVC pipe, and a saddle 13, a rubber ring 14, The operating ring 15 is a component.

The short socket pipe 12 is constructed by assembling and joining a small diameter neck part 16 and a large diameter socket part 17 by gluing or fusion, and the end face of the large diameter socket part 17 is used as a thrust receiving part. Part 18
A rubber ring attachment part 19 for the rubber ring 1 interposed between the large diameter socket part 17 and the branch pipe is provided in the middle part of the large diameter socket part 17.

However, the branch pipe joint 10 has a short socket pipe 1 located on the inner side of the peripheral edge of the fitting port 11A of the original pipe 11.
2 is provided with a locking portion 21 that can be locked to the inner surface of the peripheral edge of the attachment port 11A. As shown in FIG. 3, the locking part 21 is divided into a plurality of parts (for example, four parts) on the outer circumference of the tip of the short socket pipe 12, and can be inserted into the fitting opening 11A, which has a slightly larger diameter than the hole diameter of the fitting opening 11A. It is formed with a protrusion of appropriate dimensions.

The branch pipe joint 10 also includes a short socket pipe 12 located on the outer surface side of the peripheral edge of the fitting port 11A of the original pipe 11.
A saddle 13 is attached to the outer periphery of the mounting opening 11A so as to be in contact with the outer surface of the periphery of the mounting opening 11A.

Further, the branch pipe joint 10 has a width greater than the wall thickness of the original pipe 11 between the locking part 21 on the outer circumference of the short socket pipe 12 and the saddle 13 attachment part. A rubber ring 14 facing the inner diameter portion of the attachment port 11A is attached.

Further, the branch pipe joint 10 has a rotatable operating ring 15 interposed between the thrust receiving portion 18 provided on the outer periphery of the short socket pipe 12 and the saddle 13. 15B
is a handle.

Further, as shown in FIG. 4, the branch pipe joint 10 is rotated by rotating the operating ring 15.
By adjusting the engagement position between the curved concave and convex engaging portion 15A provided on the thrust receiving portion 18 of the short socket tube 12, the original tube 11 and the saddle 13 can be adjusted.
The structure is such that the locking portion 21 of the short socket pipe 12 can be pulled up, and the rubber ring 14 can be compressed and deformed to be crimped onto the inner diameter portion of the attachment port 11A.

In the above embodiment, the operating ring 1
The thrust receiving part on the short socket pipe 12 side that engages with the uneven engaging part 15A of No. 5 is constituted by the thrust receiving part 18 that is integrated with the short socket pipe 12. However, the thrust receiver on the side of the short socket pipe 12 can also be configured with a thrust ring separate from the short socket pipe 12.

Furthermore, in the above embodiment, the engagement position between the concave-convex engaging portion 15A provided on the operating ring 15 and the concave-convex engaging portion 18A provided on the thrust receiving portion 18 of the short socket pipe 12 was adjusted. . However, the engagement position between the concave-convex engaging portion 15A provided on the operating ring 15 and the concave-convex engaging portion provided on the saddle 13 may be adjusted.

Further, the saddle 13 and the small diameter neck portion 16 of the short socket tube 12 may be provided with a positioning structure as shown in FIG. That is, a cylindrical bulge 13A is formed to protrude from the center of the saddle 13. As shown in FIG. 6, on the inner surface of the cylindrical bulging portion 13A and the outer surface of the small diameter neck portion 16 of the short socket pipe 12, there are grooves 22 and protrusions 23 that engage with each other. It is provided in the axial direction of the short tube. Due to the engagement between the groove 22 and the projection 23, the saddle 1
3 and the small diameter neck portion 16 are positioned and prevented from rotating. The shape of the saddle is not limited to the illustrated rectangular shape, but may be an elliptical shape, a circular shape, or a square shape with cut-off corners.

However, the above-mentioned branch pipe joint 10 is attached to the attachment port 11A of the original pipe 11 in accordance with the following steps (1) to (3).

(1) Insert one side of the locking part 21 provided at the tip of the short socket tube 12 into the inner surface of the tube top (axial side of the source tube 11) at the peripheral edge of the attachment port 11A of the source tube 11. and lock it (
(See FIG. 8(A)).

(2) Press the socket short pipe 12 to press the other locking part 21 on the opposite side to the locking part 21 inserted above, and press the locking part 21 in the same way as in (1). It is locked to the inner surface of the top of the tube (the axial side of the original tube 11) at the peripheral edge of the attachment port 11A of the tube 11 (see FIG. 8(B)).

(3) By rotating the operating ring 15 around the axis of the short socket tube 12, the locking portion 21 of the short socket tube 12 is pulled up with respect to the original tube 11 and the saddle 13, and the rubber ring 14 is pulled up. is compressed and deformed and crimped onto the inner diameter portion of the attachment port 11A (see FIG. 8(C)).

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

[0042] By rotating the operation ring 15, the rubber ring 14 provided on the outer circumference of the short socket pipe 12 is compressed and deformed, and is crimped onto the inner diameter part of the attachment port 11A of the original pipe 11. Since it is a dry installation method that does not use agents, it has good workability and can improve water-stopping properties and strength.

(2) Since the locking portion 21 provided at the tip of the short socket tube 12 can be locked to the inner surface of the peripheral edge of the attachment port 11A, there is no fear that the short socket tube 12 will come off.

Note that since the concave-convex engaging portion 15A of the operating ring 15 and the concave-convex engaging portion 18A of the thrust receiving portion 18 are curved and engage with each other, the above-mentioned portion that can be pulled up by adjusting the engagement position of both The lifting position of the locking portion 21 can be adjusted steplessly, and as a result, the dimensional tolerance of the rubber ring 14 and the dimensional tolerance of the hole diameter of the attachment port 11A can be absorbed.

■ Insert and lock one of the locking parts 21 into the inner surface of the peripheral edge of the socket 11A, then press the socket short pipe 12 and insert the other locking part 21 into the socket. Since it is inserted into the inner surface of the periphery of 11A and locked, the attachment opening 11
The pushing deformation distance of the other locking part 21 relative to A is reduced by approximately half, and the locking part 21 can be pushed and inserted using the lever principle. For this reason, while making the protrusion dimension of the locking part 21 necessary and sufficient,
The locking portion 21 can be inserted and locked into the inner surface of the attachment port 11A reliably and easily, and the short socket pipe 12 can be securely and easily attached without fear of detachment.

(Second Embodiment) The locking portion 21 provided on the short socket pipe 12 of the branch pipe joint 10 may be as shown in FIG. That is, in FIG. 7, the locking part 21 is divided into a plurality of parts (for example, into four parts) on the outer circumference of the tip of the small diameter neck part 16, and
It is protrusively molded to have an appropriate size that is slightly larger than the diameter of the hole 1A and can be inserted into the attachment opening 11A. Locking part 21A,
Reference numeral 21B engages with the inner surface of the tube top portion of the master tube 11, and locking portions 21C and 21C engage with the inner surface of the tube side portion of the master tube 11. The dimensional relationship between the locking portions is 21A>21B>21C. In addition, 21B=21C may be sufficient.

When attaching the branch pipe joint 10 to the attachment port 11A of the original pipe 11, first, in step (1) of the installation procedure of the branch pipe joint 10 in the first embodiment, the large protrusion dimension is Connect the locking portion 21A to the attachment port 11A of the original tube 11.
It is intended to be inserted and locked into the inner surface of the peripheral edge.

According to the second embodiment, at least one of the locking portions 21 is given a large protruding dimension, and the locking portion 21A with the large protruding size is first attached to the inner surface of the peripheral edge of the mounting opening 11A. Since the other locking part 21B is inserted into and locked in the mounting opening 11A, it is easy to push and insert the other locking part 21B into the mounting opening 11A, and the locking state of the locking parts 21A to 21C with respect to the mounting opening 11A is made more secure overall. can.

(Third Embodiment) The branch pipe joint 30 is substantially different from the above branch pipe joint 10 in that, as shown in FIG. 5, the original pipe 11 has a rib 11C on the outer circumference of the pipe body 11B. The saddle 13 is provided with a seating surface 13A that follows the shape of the rib 11C, and is mounted on the outer surface of the peripheral portion of the attachment opening 11A of the original tube 11.

According to the third embodiment, although the original pipe 11 has the ribs 11C on the outer circumference of the pipe body 11B, high water-stopping properties can be ensured in the same manner as in the branch pipe joint 10, so that high water-stopping properties can be ensured. Therefore, there is no need for complicated construction such as making the saddle 13 closely fit along the complicated shape of the rib 11C. Therefore, the simple structure improves workability, water-stopping properties, and strength.
It is possible to reliably prevent the withdrawal of

[0051]

According to the present invention as set forth in claim 1, workability is improved when attaching the short socket pipe to the attachment port of the original pipe,
Moreover, the water-stopping property and strength can be improved, and detachment of the short socket pipe can be reliably prevented.

According to the second aspect of the present invention, even if the original pipe has ribs on the outer periphery of the pipe body, the simple structure improves workability and improves water-stopping properties and strength. Moreover, detachment of the short socket pipe can be reliably prevented.

According to the third and fourth aspects of the present invention, the branch pipe joint can be reliably and easily attached to the attachment port of the original pipe.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing a branch pipe joint according to a first embodiment of the present invention.

FIG. 2 is an exploded view showing components of the branch pipe joint of FIG. 1;

FIG. 3 is an end view showing the shape of the tip of the short socket tube of FIG. 1;

FIG. 4 is a schematic diagram showing an engaged state between the concave-convex engaging portion of the operating ring and the concave-convex engaging portion of the thrust receiving portion.

FIG. 5 is a sectional view of a main part showing a branch pipe joint according to a third embodiment of the present invention.

FIG. 6 is a sectional view showing the positioning structure of the saddle and the small diameter neck of the short socket pipe.

FIG. 7 is an end view showing the shape of the tip end surface of a short socket pipe according to a second embodiment of the present invention.

FIG. 8 is a process diagram showing an example of a method for connecting a branch pipe joint according to the present invention.

[Explanation of symbols]

10 Branch pipe fitting 30 Branch pipe fitting 11 Original tube 11A Installation port 11B Pipe body 11C Rib 12 Socket short pipe 13 Saddle 13A Seating surface 14 Rubber ring 15 Operation ring 15A Uneven engagement part 18 Thrust receiving part 18A Uneven engagement part 21 Locking part 21A-21C Locking part

Claims (4)

[Claims] Claim 1: In a branch pipe joint in which a short socket pipe for connecting a branch pipe is attached to a fitting port provided on the main pipe, the short socket pipe is located on the inner surface side of the peripheral edge of the fitting port in the main pipe. A locking part that can be locked to the inner surface of the peripheral edge of the fitting is provided at the tip of the tube, and a locking part that can be locked to the inner surface of the peripheral edge of the fitting is provided on the outer periphery of the short socket tube located on the outer surface side of the peripheral edge of the fitting. Attach a saddle that touches the outer surface of the
Between the locking part and the saddle attachment part on the outer periphery of the short socket pipe, a rubber ring facing the inner diameter of the fitting opening of the original pipe with a width equal to or greater than the wall thickness of the original pipe is installed, and the short socket pipe is fixed. A rotatable operating ring is interposed between the thrust receiving part provided on the outer circumference of the pipe and the saddle, and by rotating the operating ring, the uneven engagement part provided on the operating ring and the short pipe side of the socket are inserted. By adjusting the engagement position with the thrust receiving part or the uneven engaging part provided on the saddle, the engaging part of the socket short pipe is pulled up with respect to the original pipe and the saddle, and the rubber ring is compressed and deformed. A branch pipe joint characterized in that it can be crimped onto the inner diameter of a fitting opening. 2. The original tube has a rib on the outer periphery of the tube body, and the saddle is provided with a seating surface that follows the shape of the rib and is attached to the outer surface of the peripheral edge of the attachment opening of the original tube. The branch pipe joint according to claim 1. 3. A method for connecting a branch pipe joint to a master pipe, which comprises the following steps (1) to (3) for attaching the branch pipe joint according to claim 1 to a fitting opening provided in the master pipe. ■Insert one of the locking parts provided at the tip of the short tube into the inner surface of the top of the tube at the periphery of the connection port of the original tube and lock it. ■Press the socket short pipe on the other locking part on the opposite side to the locking part inserted above, and press the other locking part on the opposite side to ■
Similarly, it is secured to the inner surface of the top of the tube at the periphery of the fitting opening of the original tube. ■By rotating the operating ring around the axis of the short socket pipe, the locking part of the short socket pipe is pulled up against the original pipe and saddle, and the rubber ring is compressed and deformed to be crimped onto the inner diameter of the fitting port. do. 4. At least one of the locking portions provided at the tip of the short socket tube is formed to protrude with a larger dimension than the other locking portions, and in the step 4. The method for connecting a branch pipe joint to a master pipe according to claim 3, wherein the stop portion is inserted and locked into the inner surface of the peripheral edge of the fitting opening of the master pipe.