JPH04203691A - Branch pipe joint - Google Patents

Abstract

PURPOSE:To improve in workability, water-stoppability and strength as well as to keep off any possible separation of a socket short pipe with certainty by regulating an engaging position with a jog engaging part through the rotational operation of an operating ring, and constituting a rubber ring so as to make it attable to a compressive deformation mounting port bore part under pressure. CONSTITUTION:A rubber ring 14 installed on an outer circumferential part of a socket short pipe 12 is compressed and deformed by the rotational operation of an operating ring 15, and it is a double-seal structure to be attached, under pressure, to a space part (S) being formed with an outer surface of a bore part and a peripheral part of a mounting port 11A of a raw pipe 11 and a ring recess groove 13B formed in the wall of a saddle bulged part 13A. Accordingly, it is a dry mounting system dispensing with any bonding agent, so that it is excellent in workability, and besides, water-stoppability and strength are improved. Since an engaged part 21 to be installed in a tip of the socket short pipe 12 is engaged with an inner surface of the peripheral part of the mounting port 11A, there is no fear of separation of this pipe 12, excellent in earthquake- proof properties in addition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a branch pipe joint used when providing a branch part in the middle of a piping line such as a sewer.

(Prior art) In conventional branch pipe joints, when attaching a short socket pipe for connecting a branch pipe to an attachment port provided on a main pipe, the saddle is glued to the outer periphery of the main pipe so as to tightly fit it. , a short socket tube is attached to this saddle.

In addition, in other conventional branch pipe joints, a caulking material is filled between the outer circumference of the original pipe and the saddle to improve water-stopping properties.

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

Furthermore, if the original tube has ribs on the outer circumference of the tube body, in order to ensure high water-stopping properties, it is necessary to fit the saddle closely along the complicated rib shape, which complicates construction.

In addition, in conventional branch pipe fittings, in order to construct branch pipe joints using a dry installation method that does not use adhesive, the tip of the short pipe is press-fitted into a rubber ring provided at the fitting port of the original pipe. Although there are some methods (see, for example, Japanese Utility Model Application Publication No. 56-90582), there is a fear that the short pipe may come off.

In the present invention, when attaching the short socket pipe to the attachment port of the original pipe,
The purpose is to improve workability, improve water-stopping properties and strength, and reliably prevent the short pipe from coming off.

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

[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 an attachment port provided in the main pipe. At the tip of the short socket tube located on the inner surface side of the peripheral edge of the socket, a plurality of locking parts that can be engaged with the inner surface of the peripheral edge of the socket are provided, and the locking parts are located on the outside side of the peripheral edge of the socket in the original pipe. A cylindrical bulge projecting upward is formed on the outer periphery of the short socket tube, and an annular groove opening toward the outer surface of the original tube is formed in the wall of the bulge. Attach a saddle that is in contact with the outer surface of the peripheral edge of the socket, and place a width equal to or larger than the wall thickness of the original tube between the locking part on the outer periphery of the short socket pipe and the saddle attachment part. A rotatable operating ring is fitted with a rubber ring that faces the inner diameter and whose upper part abuts the outer surface of the periphery of the socket, and is mounted between the thrust receiving part provided on the outer periphery of the short socket pipe 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. This makes it possible to pull up the locking portion of the short socket tube with respect to the original tube and the saddle, and press the rubber ring to the inner diameter portion of the compression deformation attachment port.

Claim 2L The present invention as described above is characterized in that 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, so that the peripheral edge of the attachment opening in the original tube has a rib. It is designed to be attached to the outside.

[Effect]

According to the present invention as set forth in claim 1, there are the following effects (1) and (2).

■By rotating the operating ring, the rubber ring provided on the outer periphery of the short socket tube is compressed and deformed to compress and deform the inside diameter of the main tube's connection port, the outer surface of the periphery of the connection port, and the wall of the saddle bulge. It has a double seal structure that is pressed into the space formed by the annular groove formed in the seal, and it is a dry installation method that does not use adhesive, so it is easy to install and has reliable water-tightness. Strength can be improved.

■The locking part provided at the tip of the short socket tube can be locked to the inner surface of the peripheral edge of the socket, so there is no fear of the short socket tube coming off.
Excellent earthquake resistance.

Further, according to the present invention as set forth in claim 2, there is the following effect (2).

■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 should be placed closely along the complex rib shape. There is no need for complicated construction.

[Example] Hereinafter, an example of the branch pipe joint of the present invention will be described based on the drawings.

FIG. 1 is a cross-sectional view of essential 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. 1, and FIG. FIG. 4 is a cross-sectional view showing the shape of the tip end of the short socket pipe, 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 receiver, and FIG. FIG. 7 is a sectional view of a main part showing a branch pipe joint according to a second embodiment.

(First Embodiment) As shown in FIG. 1 and Part 2, the branch pipe joint 10 has a short socket pipe for connecting a branch pipe to an attachment port 11A provided on a base pipe 11 such as a Huum pipe or a PVC pipe. 12, and its constituent parts are a saddle 13, a rubber ring 14, and an operating ring 15.

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 adhesive or fusion,
The end face of the large diameter socket part 17 is a thrust receiving part 18, and the large diameter socket part 17 is provided with a rubber ring mounting part 19 for mounting the rubber ring 1 interposed between the large diameter socket part 17 and the branch pipe.

However, the branch pipe joint 10 has a connection port 1 in the original pipe 11.
At the tip of the short socket tube 12 (ie, the tip of the small diameter neck portion 16) located on the inner surface side of the circumferential edge of the attachment port 11A, a locking portion 21 is provided which can be engaged with the inner surface of the circumferential 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 is attached to the fitting port 11A, which is slightly larger than the diameter of the hole of the fitting port 11A. It is extruded to a suitable size for insertion. The locking portions 21A and 21B lock on the inner surface of the top of the original tube, and the locking portion 21
C121C is fixed to the inner surface of the tube side portion of the original tube. The dimensional relationship of each locking part is 2 ]A>21B
>21C.

In addition, the branch pipe joint 10 has an attachment port 11 in the original pipe 11.
On the outer periphery of the short socket pipe 12 located on the outer surface side of the A periphery,
A saddle 13 is attached to the outer surface of the peripheral edge of the attachment opening 11A. A cylindrical bulge 13A is provided at the center of the saddle 13.
is formed protrudingly. The bulging portion 13A is provided with an annular groove 13B that opens toward the outer surface of the original tube 11 in its wall.

The inner surface of the groove 13B has a tapered surface, and the length of the inner wall is also shortened.

Therefore, when the rubber ring 14 undergoes compression deformation, the rubber ring 14
4 can be easily accommodated and mounted in the annular groove 13B.

Further, as shown in FIG. 2, 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. is provided in the axial direction of the short socket pipe 12. The groove 22 and the protrusion 2
3, the saddle 13 and the small diameter neck portion 16 are positioned and prevented from rotating. saddle 1
The shape of No. 3 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.

In addition, the branch pipe joint 10 has an attachment opening of the original pipe 11 with a width equal to or larger than the wall thickness of the original pipe 11 between the locking part 21 on the outer periphery of the short socket pipe 12 and the saddle 13 attachment part. 11A
A rubber ring 14 is attached which faces the inner diameter portion and whose upper portion abuts the outer surface of the peripheral portion of the mounting opening 11A and the inner surface of the annular groove 13B of the saddle bulge portion 13A. That is, the attachment port 1'I
The part of the rubber ring 14 located on the outer side of the peripheral edge A is connected to the inner surface of the annular groove 13B of the saddle bulge 13A and the attachment opening 11.
It is designed to undergo compressive deformation in the space (S) formed by the outer surface of the peripheral edge of A.

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.

In addition, as shown in FIG. 4, the branch pipe joint 10 can be operated by rotating the handle 15B of the operating ring 15 to connect the curved concavo-convex engaging portion 15A provided on the operating ring 15 to the short socket pipe 12.
By adjusting the engagement position with the curved uneven engagement portion 18A provided on the thrust receiving portion 18 of the The ring 14 is compressed and deformed to form the inner diameter portion of the mounting port 11A, the outer surface of the peripheral portion of the mounting port 11A, and the saddle bulge portion 13A.
It is configured so that it can be press-fitted to a space (S) formed by an annular groove 13B formed in the wall of.

In the above embodiment, the thrust receiving portions of the 12 short socket pipes that engage with the concave and convex engaging portion 15A of the operating ring 15 are constituted by the thrust receiving portion 18 that is integrated with the short socket pipe I2. 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.

Further, in the above embodiment, the uneven engagement portion 15A provided on the operation ring 15 and the thrust receiving portion 18 of the short socket pipe 12 are
The engagement position with the concavo-convex engagement portion 18A provided therein was adjusted. However, the uneven engagement portion 15A provided on the operation ring 15
The engagement position with the uneven engagement portion provided on the saddle 13 may be adjusted.

Furthermore, instead of the rubber ring 14 in the above embodiment, a sixth
You may use the cross-sectional shapes shown in Figures (A) to (D).

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

■By rotating the operating ring 15, the rubber ring 14 provided on the outer circumference of the short socket pipe 12 is compressed and deformed, and the outer surface of the inner diameter part of the attachment port 11A of the original tube 11 and the outer surface of the peripheral edge of the attachment port 11A and the saddle are compressed and deformed. Annular groove 13 formed in the wall of the bulging portion 13A
It has a double seal structure that is pressure-bonded to the space (S) formed by can.

■The locking part 21 provided at the tip of the short socket pipe 12 is locked to the inner surface of the peripheral edge of the fitting port 1.1A, so the short socket pipe 12
There is no fear of it coming off, and it has excellent earthquake resistance.

Incidentally, since the concave-convex engaging portion 15A of the operation ring 15 and the concave-convex engaging portion 18A of the thrust receiving portion 18 are curved and engage with each other, the locking portion is pulled up by adjusting the engagement position of both. The lifting position of 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.

(Second Embodiment) The branch pipe joint 30 is substantially different from the branch pipe joint 10 described above, as shown in FIG. 13 or above rib 11
It is provided with a seating surface 13C that follows a C shape and is mounted on the outer surface of the peripheral edge of the attachment port 11A in the original tube 11. In this case, it is preferable to remove in advance the rib IIC on the outer periphery of the tube body 11B at the portion where the rubber ring 14 abuts on the outer surface of the peripheral edge of the attachment port 11A.

According to the second embodiment, although the original pipe 11 has the rib 11C on the outer circumference of the pipe main body 11B, the branch pipe joint 10
Since high water-stopping properties can be ensured in the same manner as in the above, there is no need for complicated construction such as making the saddle 13 closely fit along the complicated shape of the rib 11C in order to ensure high water-stopping properties. 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 12.

〔Effect of the invention〕

As described above, according to the present invention as set forth in claim 1, when attaching the short socket pipe to the attachment port of the original pipe, it is possible to improve workability, improve water-stopping properties and strength, and further improve the water-stopping property and strength. It is possible to reliably prevent the short tube from coming off.

Furthermore, according to the present invention as set forth in claim 2, even if the original pipe has ribs on the outer periphery of the pipe main body, the simple structure improves workability and improves water-stopping properties and strength. Furthermore, detachment of the short socket pipe can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a cross-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. 1, and FIG. FIG. 4 is a cross-sectional view showing the shape of the tip of the short tube, FIG. 4 is a schematic diagram showing the engagement state between the concave-convex engaging portion of the operating ring and the concave-convex engaging portion of the thrust receiving portion, and FIG. FIGS. 6(A) to 6(D) are cross-sectional views of main parts showing a branch pipe joint according to the second embodiment, and FIGS. 6(A) to (D) are cross-sectional views showing modified examples of the rubber ring used in the present invention. 10.30: Branch pipe joint, 11: Original pipe, 11A: Attachment port, 11B: Pipe body, 11C: Rib, 12: Socket short pipe, 1
3: saddle, 13A: bulge, 13B: annular groove, 13
C: Seating surface, 14: Rubber ring, 15: Operation ring material, 15
A, 18A: uneven engagement part, 15B: handle, 16: small diameter neck part, 18 nislast receiving part, 21: locking part, 22: groove, 2
3: protrusion, S: space.

Claims (2)

[Claims] (1) In a branch pipe joint in which a short socket pipe for connecting a branch pipe is attached to a fitting opening provided on the main pipe, the tip of the short socket pipe located on the inner side of the peripheral edge of the fitting port in the main pipe. A plurality of locking portions that can be locked on the inner surface of the peripheral edge of the fitting are provided, and a cylinder that protrudes upward is provided on the outer peripheral portion of the short socket pipe located on the outer surface side of the peripheral edge of the fitting in the original pipe. The wall of the bulge has an annular concave groove that opens toward the outer surface of the original tube, and a saddle that contacts the outer surface of the peripheral edge of the fitting opening is attached to the socket. Between the locking part and the saddle attachment part on the outer periphery of the short pipe, a width larger than the wall thickness of the original tube faces the inner diameter part of the attachment opening of the original tube, and the upper part is the outer surface of the peripheral edge of the attachment opening. A rotatable operating ring is interposed between the saddle and the thrust receiver provided on the outer periphery of the short socket pipe, and the operating ring is rotated by rotating the operating ring. By adjusting the engagement position between the concave-convex engaging part provided on the socket and the concave-convex engaging part provided on the thrust receiving part on the short pipe side of the socket or the saddle,
A branch pipe joint characterized in that the locking part of the short socket pipe is pulled up with respect to the original pipe and the saddle, and the rubber ring is compressed and deformed to be crimped onto the inner diameter part of the fitting port. (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. Branch pipe joint according to item 1.