JPH0784919B2 - Branch pipe fitting - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a branch pipe joint used when a branch portion is provided in the middle of a pipeline such as sewer.

[Conventional technology]

In the conventional branch pipe joint, when attaching the receiving pipe short pipe for connecting the branch pipe to the attachment port provided on the raw pipe, the saddle is adhered to the outer periphery of the raw pipe so as to be in close contact, and the saddle is received on this saddle. It is decided to attach the short mouth pipe.

In addition, in another conventional branch pipe joint, a caulking material is filled between the outer peripheral portion of the raw pipe and the saddle to improve water blocking performance.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional technique, since the branch pipe joint is constructed by a wet attachment method using an adhesive, the workability is poor, and there is a limit in improving the waterproofness and strength.

Further, in the case where the raw pipe has ribs on the outer peripheral portion of the pipe body, it is necessary to closely attach the saddle along the complicated rib shape in order to secure high water shuttling, which complicates the construction.

In addition, in the conventional branch pipe joint, the tip of the receiving short pipe is press-fitted into the rubber ring provided at the attachment port of the original pipe in order to configure the branch pipe joint by the ring attachment method without using an adhesive. Some of them do (for example, see Japanese Utility Model Laid-Open No. Sho 56-90582), but there is a concern that the socket short pipe will come off.

The present invention, when attaching the receiving pipe to the attachment port of the original pipe,
The purpose of the invention is to improve workability, improve water resistance and strength, and reliably prevent disengagement of the receiving short pipe.

Further, the present invention, even if the original pipe has a rib on the outer peripheral portion of the pipe body, the workability is improved by a simple configuration,
In addition, the purpose is to improve the water-stopping property and the strength, and to prevent the detachment of the receiving-end short pipe reliably.

[Means for Solving the Problems]

The present invention according to claim 1 is a branch pipe joint in which a receiving port short pipe for connecting a branch pipe is attached to an attachment port provided in a raw pipe, wherein the receiving port short pipe is a first short pipe having a small diameter. A second short pipe having a receiving portion, the first short pipe and the second short pipe are connected via a rubber ring by a split ring attached to annular grooves provided in both short pipes,
At the tip of the first short pipe located on the inner surface side of the attachment port peripheral portion of the original pipe, a plurality of locking portions that can be locked to the inner surface of the attachment port peripheral portion are provided, and the outer surface side of the attachment port peripheral portion. Located above the first
A saddle that is in contact with the outer surface of the peripheral portion of the attachment port is attached to the outer peripheral portion of the short pipe, and a rubber ring is attached between the locking portion and the saddle attachment portion on the outer peripheral portion of the first short pipe. By adjusting the engagement position between the concave-convex engaging portion provided on the thrust receiving portion on the raw pipe side of the second short pipe and the concave-convex engaging portion provided on the saddle by rotating the short pipe, The locking portion of the first short pipe is pulled up with respect to the pipe and the saddle, and the rubber ring can be compressed and deformed so as to be crimped to the outer surface of the inner diameter portion of the attachment opening or the peripheral portion of the attachment opening.

According to the present invention as set forth in claim 2, the raw pipe has a rib on the outer peripheral portion of the pipe body, and the saddle is provided with a seating surface along the rib shape, and the saddle has a seating peripheral portion of the raw pipe. It is designed to be attached to the outer surface.

[Action]

According to the present invention described in claim 1, the following effects are obtained.

By rotating the second short pipe, the locking portion of the first short pipe is pulled up, and the rubber ring provided on the outer periphery of the first short pipe is compressed and deformed, so that the inner diameter of the original pipe or the attachment port Since it is pressed onto the outer surface of the peripheral portion and is a dry attachment method that does not use an adhesive, workability is good, and water-stopping and attachment strength can be improved.

Since the locking part provided at the tip of the first short pipe can be locked on the inner surface of the peripheral portion of the attachment port, there is no fear of detaching the receiving short pipe,
Excellent in earthquake resistance.

Further, according to the present invention described in claim 2, there is the following action.

Even if the raw pipe has ribs on the outer periphery of the pipe body, it is possible to secure high waterproofness by the above, so in order to secure high waterproofness, it is necessary to make the saddle closely adhere along the complicated rib shape. No complicated construction is involved.

〔Example〕

Hereinafter, an example of the branch pipe joint of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a main part of 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, and FIG. Sectional drawing which shows the front-end | tip surface shape of a 1st short pipe, FIG. 4 is a schematic diagram which shows the engagement state of the uneven | corrugated engaging part of a 2nd short pipe, and the uneven | corrugated engaging part of a saddle, FIGS. 5-6. [Fig. 3] is a main-portion cross-sectional view showing a branch pipe joint according to a second embodiment and a third embodiment of the present invention, respectively.

(First Embodiment) As shown in FIG. 1, a branch pipe joint 10 is provided with a short pipe 12 for connecting a branch pipe to an attachment port 11A provided on a raw pipe 11 such as a fume pipe or a PVC pipe. The saddle 13, the rubber ring 14, and the split ring 21 are components.

The socket short pipe 12 connects the first short pipe 15 and the second short pipe 16 having the socket portion 16A via the rubber ring 17 by the split ring 21 attached to the annular grooves 15B, 16B of both short pipes. It is composed of the second
The end surface of the short pipe 16 is a thrust receiving portion 18, and the receiving portion 16A is provided with a rubber ring mounting portion 19 for mounting a rubber ring 19A interposed between the thrust pipe 18 and the branch pipe.

Therefore, the branch pipe joint 10 has the attachment port 11 at the tip of the first short pipe 15 located on the inner surface side of the peripheral edge of the attachment port 11A of the raw pipe 11.
A locking portion (20) that can be locked on the inner surface of the A peripheral portion is provided. As shown in FIG. 3, the locking portion 20 is divided into a plurality of portions (for example, four divisions) on the outer peripheral portion of the distal end of the first short pipe 15, and is slightly larger than the hole diameter of the attachment port 11A. It is protrudingly molded to a suitable size so that it can be inserted. The locking portions 20A, 20B are locked to the inner surface of the top of the raw pipe 11, and the locking portions 20C, 2
0C locks the inner surface of the tube side of the raw tube 11. Then, the dimensional relationship of each locking portion is such that 20A>20B> 20C.

Further, the branch pipe joint 10 has an annular groove in the outer periphery of the tip of the first short pipe 15 located on the outer surface side of the peripheral portion of the attachment port 11A of the raw pipe 11.
15B is formed, and a saddle 13 that is in contact with the outer surface of the peripheral portion of the attachment port 11A is attached to the outer peripheral portion of the first short pipe 15 between the annular groove 15B and the locking portion 20. A cylindrical swelling portion 13A is formed so as to project at the center of the saddle 13. The bulged portion 13A
The end face of is also the thrust receiving part. As shown in FIG. 2, the inner surface of the cylindrical bulging portion 13A and the outer surface of the first short tube 15 facing each other are provided with a projection and a recess 23 and a groove 22 which are engaged with each other. By engaging the projection 23 and the groove 22, the saddle 13 and the first short pipe 15 can be positioned and prevented from rotating. The shape of the saddle 13 is not limited to the illustrated rectangular shape, but may be an elliptical shape, a circular shape, or an angular shape with its corners cut out in a curved shape.

Further, the branch pipe joint 10 has an attachment port of the raw pipe 11 with a width equal to or larger than the thickness of the raw pipe 11 between the engaging portion 20 and the saddle 13 mounting portion in the outer peripheral portion of the receiving short pipe 12. A rubber ring 14 facing the inner diameter of 11A is attached.

Further, the branch pipe joint 10 is provided on the inner peripheral surface of the thrust receiving portion 18 provided on the outer peripheral portion of the second short pipe 16 so as to face the annular groove 15B formed on the outer peripheral portion of the tip end of the first short pipe 15. It is provided with a facing annular groove 16B. 16C is a handle.

In addition, as shown in FIGS. 1 and 3, the branch pipe joint 10 is provided with a curved concave-convex engagement member provided on the thrust receiving portion 18 of the second short pipe 16 by rotating the handle 16C of the second short pipe 16. Joint part 18B
And a curved concave-convex engaging portion 13B provided on the bulging portion 13A of the saddle 13.
By adjusting the engagement position with, the locking portion 20 of the first short pipe 15 is pulled up with respect to the raw pipe 11 and the saddle 13, and the rubber ring 14 is compressed and deformed to be crimped to the inner diameter portion of the attachment port 11A. It is configured to allow.

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

By rotating the second short pipe 16, the rubber ring 14 provided on the outer periphery of the first short pipe 15 is compressed and deformed, and the attachment port 11A of the raw pipe 11 is attached.
Since it is pressure-bonded to the inner diameter portion and is a dry attachment method that does not use an adhesive, the workability is good, and the waterproofness and strength can be improved.

The locking portion 20 provided at the tip of the first short pipe 15 is the attachment port 11A.
The second short pipe 16 can be locked to the inner surface of the peripheral portion and the first short pipe 15
Since it is connected by the split ring 21 mounted and locked in the annular grooves 16B, 15B provided on both short pipes via the rubber ring 17 and there is no fear of detaching the socket short pipe 12, it has excellent earthquake resistance ing.

Since the concave-convex engaging portion 16B of the second short pipe 16 and the concave-convex engaging portion 13B of the saddle bulge portion 13A are curved and engage with each other, adjustment of the engaging positions of the both is performed. The pulling-up position of the engaging portion 20 that is pulled up 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 in that the raw pipe 11 has a rib 11C on the outer peripheral portion of the pipe body 11B as shown in FIG. 13 is equipped with a seating surface 13C that follows the shape of the rib 11C, and is attached to the outer surface of the peripheral portion of the attachment port 11A of the original pipe 11. in this case. On the outer surface of the peripheral portion of the attachment port 11A, it is preferable to previously remove the ribs on the outer circumference of the pipe body 11B at the portion where the rubber ring 14 abuts.

According to the second embodiment described above, although the raw pipe 11 has the ribs 11C on the outer peripheral portion of the pipe body 11B, it is possible to secure high waterproofness as in the case of the branch pipe joint 10. There is no need for complicated construction such that the saddle 13 is closely attached along the complicated rib 11C shape.

(Third Embodiment) The branch pipe joint 30 is substantially different from the branch pipe joint 10 in that the shape of the rubber ring in the branch pipe joint 10 is the original pipe attachment port 11A, as shown in FIG. The upper part of the peripheral edge of the first short pipe 15 is changed to the space S surrounded by the outer peripheral surface of the first short pipe 15 and the inner surface concave portion of the saddle 13.

According to the third embodiment described above, since the storage space for the rubber ring is secured, the rubber ring 14 is only subjected to a certain amount of compressive deformation. Therefore, with a simple configuration, the workability is improved and the long-term operation is improved. A stable water stop can be secured.

〔The invention's effect〕

As described above, according to the present invention as set forth in claim 1, when attaching the receiving pipe to the attachment port of the raw pipe, the workability is improved, and the water blocking property and the strength are further improved. It is possible to reliably prevent separation of the short pipe.

Further, according to the present invention as set forth in claim 2, even if the raw pipe has ribs on the outer peripheral portion of the pipe main body, the workability is improved and the waterproofness and strength are improved by a simple configuration. In addition, it is possible to reliably prevent disengagement of the receiving port short pipe.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of 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, and FIG. Sectional drawing which shows the front-end | tip surface shape of a 1st short pipe, FIG. 4 is a schematic diagram which shows the engagement state of the uneven | corrugated engagement part of a 2nd short pipe, and a saddle engagement part, FIGS. 5-6 is each. It is an important section sectional view showing a branch pipe joint concerning the 2nd example and the 3rd example of the present invention. 10, 30: Branch pipe joint, 11: Original pipe, 11A: Attachment port, 11B: Pipe body, 11C: Rib, 12: Receptacle short pipe, 13: Saddle, 13A: Swelling part,
13C: seating surface, 14, 17: rubber ring, 15: first short pipe, 16: second short pipe, 15B, 16B: annular groove, 13B, 18B: curved concave-convex engaging portion, 2
0: Locking part, 21: Split ring, S: Space part.

Claims (2)

[Claims] 1. A branch pipe joint in which an inlet short pipe for connecting a branch pipe is attached to an attachment port provided in an original pipe, the inlet short pipe having a first short pipe having a small diameter and an inlet portion. A second short pipe, and the first short pipe and the second short pipe are connected via a rubber ring by a split ring mounted in an annular groove provided in both short pipes, and a peripheral portion of an attachment port in the original pipe A plurality of locking portions that can be locked to the inner surface of the peripheral portion of the attachment port are provided at the tip of the first short pipe located on the inner surface side of the first short pipe, and the first short pipe is located on the outer surface side of the peripheral portion of the attachment port. Attach a saddle to the outer periphery of the attachment to the outer surface of the peripheral edge of the attachment port.
A rubber ring was mounted between the locking portion and the saddle mounting portion on the outer peripheral portion of the short pipe, and the rubber ring was provided on the thrust receiving portion on the raw pipe side of the second short pipe by the rotating operation of the second short pipe. By adjusting the engaging positions of the concave-convex engaging portion and the concave-convex engaging portion provided on the saddle, the locking portion of the first 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 to the inner surface of the attachment port or the outer surface of the periphery of the attachment port. 2. The raw pipe has ribs on an outer peripheral portion of a pipe body, and the saddle is provided with a seating surface conforming to the rib shape and is attached to an outer surface of a peripheral portion of an attachment port of the raw pipe. The branch pipe joint according to claim 1.