JPS5819431Y2 - Branch pipe fitting - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a branch pipe fitting used when installing a branch pipe in the middle of a main pipe such as a water pipe.

Various types of main pipes are used, such as cast iron pipes, steel pipes, asbestos pipes, and vinyl pipes, but even if these pipes have the same diameter, their outer diameters differ somewhat depending on the type.

However, it would be uneconomical to manufacture saddles that fit each main pipe having a different outer diameter because the number of types of saddles would increase.

In addition, conventional branch pipe fittings require work such as installing a wedge-shaped tightening block between the lower saddle and the main pipe and pushing this in with a tightening bolt to tighten the saddle. It was necessary to dig deeply into the bottom of the main pipe, which had the disadvantage of requiring a lot of work.

In view of these problems, the present invention provides multiple recesses inside the lower saddle and removably attaches liners to these recesses, so that even if there is a slight difference in the outer diameter of the main pipes, the lower saddle can be used as the main pipe. In addition, the cylindrical body fitted into the cylindrical part of the upper saddle is tightened by a bright part screwed onto a female thread provided on the cylindrical part, and is provided in a circumferential groove on the lower surface of the cylindrical body. The saddle can be securely fixed to the main pipe by attaching the watertight annular gasket to the surface of the main pipe, and the fixing work can be done on the upper saddle side, eliminating the need to dig too much into the bottom of the buried pipe. In addition, the branch pipe is screwed into the female thread of this cylindrical body, so that when the diameter of the branch pipe changes, it is only necessary to replace the cylindrical body with one that matches the branch pipe. However, the details are as follows.

In the figure, 1 is a main pipe, 2 is an upper saddle, and 3 is a lower saddle. The upper saddle 2 has outward engaging parts 4 at both ends, and the lower saddle 3 has inward engaging parts 5 at both ends. It engages with the engagement portion 4.

Further, a plurality of recesses 6 are formed inside the lower saddle 3, and a liner 7 having an arcuate contact surface adapted to the circumferential surface of the main pipe 1 is removably attached to the recesses 6.

A cylindrical portion 8 is formed in the center of the upper saddle 2, and within this cylindrical portion 8 is a cylindrical body 1 having a female thread for attaching a branch pipe 9 inside.
0 in a slidable manner.

A watertight annular packing 11 that tightly contacts the surface of the main pipe 1 is fitted into the circumferential groove on the lower surface of the cylindrical body 10, and an axial protrusion 12 is provided on the outer periphery of the cylindrical body 10, which is attached to the cylindrical part. It is slidably fitted into the vertical groove 13 on the inside of 8.

Numeral 414 is a bright part that is screwed into a female thread inside the upper part of the cylindrical part 8, and by tightening this bright part 14, the cylindrical body 10 is fixed to the main pipe 1.
The liner 7 is pressed onto the upper surface of the main pipe 1, and the upper saddle 2 is attracted by the reaction force to strengthen the connection between the engaging parts 4 and 5, and the liner 7 is strongly pressed against the main pipe 1.

The bright part 14 has a hexagonal nut shape in FIG. 1, but in FIG.
As shown in Fig. 5, it has a cylindrical shape and has a plurality of fitting holes 15 or 16 on its outer periphery, and these fitting holes 15 or 16 are used to turn the bright part 14 with a pipe wrench, chain tongs, metal round bar, etc. It's okay.

Further, the inner surface of the lower saddle 3, the surface of the liner 7 that contacts the main pipe, and the lower surface of the cylinder body 10 can be made uneven, or can be prevented from slipping by bonding leather, hard rubber, or the like.

Incidentally, after the cylinder body 10 is fixed, a hole is provided in the main pipe 1 and the branch pipe 9 is attached.

The present invention has the above structure, in which the upper saddle 2 and the lower saddle 3 are engaged at the engaging parts 4 and 5, and by screwing the bright part 14 into the cylindrical part 8, the lower surface of the cylindrical body 10 is brought into close contact with the main pipe 1. The seal 11 maintains watertightness, and the upper and lower saddles 2,
3 is also strengthened, so that the branch pipe 9 can be attached very easily and efficiently.

In addition, since the liner 7 is attached to the lower saddle 3, a plurality of types of liners 7 are prepared, each having an inner surface of various curvatures suitable for main pipes of various outer diameters, and an outer surface suitable for the recess 6. By selectively using this, even if the radii of the inner surfaces of the upper and lower saddles 2, 3 and the surface of the main pipe 1 are slightly different, they can be securely fixed.

Further, by making the lower surface of the cylinder 10 match the curved surface of the main pipe 1 with the largest diameter, some gaps can be compensated by the packing 11, so that it can be used for both purposes.

Therefore, even if the outer diameter of the main pipe 1 is slightly different, the branch pipe can be attached with one type of fitting.

In addition, the present invention also provides a bright part 1 screwed to the cylindrical part 8 of the upper saddle 2.
4 and tighten the cylindrical body 10 to fix the upper and lower saddles 2 and 3 to the main pipe 1, and also attach the branch pipe to the female thread of the cylindrical body 10 in the cylindrical part 8, so all work is done. This can be done from the upper saddle 2 side.

Therefore, in the case of a buried pipe, it is only necessary to dig the bottom of the main pipe 1 to the extent that the lower saddle 3 can fit therein, making the work easy and efficient.

Furthermore, when the diameter of the branch pipe 9 is changed, it is only necessary to replace the cylindrical body 10 with one that matches the branch pipe, which is advantageous, such as being economical.

[Brief explanation of drawings]

Fig. 1 is a plan view of the inventive fixture, Fig. 2 is a longitudinal sectional front view of the same as above, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2, and Figs. 4 and 5 are each of the bright parts. It is a longitudinal cross-sectional view showing the side. 1... Main pipe, 2... Upper saddle, 3...
...Lower saddle, 4.5...Latching part, 6...
...Recess, 7...Liner 8...
Cylindrical part, 9... Branch pipe, 10... Cylindrical body, 11... Packing, 14... Bright part.

Claims (1)

[Scope of utility model registration request] In a branch pipe fitting in which a branch pipe is attached to the upper saddle by providing engaging parts that engage with each other at each end of an upper saddle and a lower saddle that fit above and below the main pipe, the cylindrical part provided on the upper saddle A female thread is provided on the inside of the upper part of the cylindrical part, and a cylindrical body with a branch pipe fitting female thread on the inside is slidably fitted into the cylindrical part. A water-tight annular gasket is fitted into the cylindrical part, and a bright part is screwed into the female screw inside the upper part of the cylindrical part to press the cylindrical body onto the main pipe. A branch pipe fitting in which a recess is formed and a liner having an arcuate contact surface that conforms to the surface of the main pipe is removably fitted into each recess.