JPH0341290A - Fitting structure for bending piping of perforated pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pipe joint structure for overhanging porous pipes used for burying cables and the like underground.

BACKGROUND OF THE INVENTION Conventionally, perforated pipes have been used for burying cables and the like underground. This perforated pipe was formed by inserting a plurality of sheath tubes into a main pipe made of cast iron, and filling the surroundings of the sheath tubes with mortar. When connecting perforated pipes, the main pipes were connected while centering each other so that there would be no difference in level between the connected sheath pipes.

Problems to be Solved by the Invention However, according to the above-mentioned conventional configuration, when a perforated pipe is bent at a joint part to form a bent pipe, a discontinuous part occurs in the sheath pipe within the joint part, and this discontinuous part There was a problem with the cable becoming obstructed when inserted into the sheath pipe.

The present invention solves the above-mentioned problems, and provides a pipe joint structure for bent piping of porous pipes, which can connect sheath pipes without creating discontinuities when the perforated pipes are bent and piped. The purpose is to

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention connects perforated pipes in which a plurality of sheath pipes are arranged in the main pipe, by connecting the socket of one of the perforated pipes to the recessed part of the other perforated pipe. At the same time, in a pipe joint structure in which the shafts are connected with their axes tilted, a sheath with one end on the insertion port side is inserted between the corresponding sheath tube on the insertion port side and the sheath tube on the socket side. It is configured to fit externally into the tube, and the other end is interposed with a flexible coupling ring which is externally fitted into the sheath tube on the socket side.

Operation With the above-described configuration, when connecting a perforated pipe, the coupling ring is first fitted externally to the sheath pipe on the insertion part side. Then, while arranging the connected porous tubes on the same axis,
With the sheath tubes centered so that they correspond to each other, insert the press section into the socket, and externally fit the coupling ring to the sheath tube on the socket side. The porous tubes connected in this state are bent at the joint so that the axes of the porous tubes are inclined to each other. At this time, by bending the flexible coupling ring, the sheath tube on the insertion port side and the sheath tube on the socket side are maintained in a connected state without creating a discontinuous portion.

EXAMPLE An example of the present invention will be described below based on the drawings. 1st
2, a perforated pipe 1 is formed by inserting and arranging a plurality of sheath pipes 3 made of resin pipes inside a main pipe 2 made of a cast iron pipe, and filling mortar 4 around the sheath pipes 3. ing. A plurality of joint plates 7.8 are provided on the outer periphery of the socket part 5 and the push-in part 6 of the perforated pipe 1, and each joint plate 7.8 is connected to the socket part 5 of one of the perforated pipes 1.
When the push-in part 6 of the other porous tube 1 is inserted into the sheath tube 1 and the corresponding sheath tubes 3 are centered, they are provided at opposing positions. In other words, the porous tubes 1 can be centered with respect to each other with the joining plates 7.8 facing each other.

An annular groove 9 is formed around the ends of the sheath tubes 3 at the push-in portions 6 and the socket portions 5, and the coupling ring lO inserted into the annular groove 8 has both ends externally attached to the corresponding sheath tubes 3. They are arranged in a fitted manner. This coupling ring 1O is made of a flexible material such as a metal tube. Moreover, a rubber ring it is interposed between the inner circumferential surface of the socket part 5 and the outer circumferential surface of the presser part 6, and a rubber ring! Watertightness is ensured by l.

Hereinafter, the effects of the above configuration will be explained.

When connecting the perforated tube 1, as shown in FIG. 1, first, it is externally fitted onto the sheath tube 3 on the side of the push-in part 6, and the coupling ring 10 is attached. Then, as shown in FIGS. 3 to 4, the porous tubes 1 to be connected to each other are arranged on the same axis, and the joining plates 7.8 are opposed to each other so that the sheath tubes 3 are centered so that they correspond to each other. In this state, the push-in part 6 is inserted into the socket part 5, and the coupling ring lO is externally fitted into the sheath pipe 3 on the socket part 5 side. In this state, as shown in FIG. 5, the connected porous tubes 1 are bent at the joint so that the axes of the porous tubes 1 are mutually inclined, and the connecting plates 7.8 are bolted together. Fixed at 11. At this time, by bending the flexible coupling ring lO, the sheath tube 3 on the side of the push-in part 6 and the sheath tube 3 on the side of the socket part 5 are connected without creating a discontinuous part. is maintained.

Therefore, cables and the like can be smoothly inserted into the sheath tube 3 without being obstructed at the joint portion.

Effects of the Invention As described above, according to the present invention, by bending the flexible coupling ring, a discontinuous part can be formed between the sheath tube on the insertion part side and the sheath tube on the socket side. It can be maintained in a connected state without occurring.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, FIG. 2 is a front view taken along the line A-A in FIG. 1, and FIGS. 3 to 5 are operational states showing the operation of the same embodiment. It is a diagram. 1... Porous pipe, 2... Main pipe, 3... Sheath pipe, 5...
... Socket part, 8... Pressing part, 10... Retaining ring.

Claims (1)

[Claims] 1. Connect two perforated pipes in which multiple sheath pipes are arranged in the main pipe by inserting the socket of one perforated pipe into the socket of the other perforated pipe and mutually tilting the axes. In the pipe joint structure, between the corresponding sheath tube on the insertion part side and the sheath tube on the socket side, one end is externally fitted to the sheath pipe on the insertion part side, and the other end is fitted externally to the sheath pipe on the socket side. A pipe joint structure for bent piping of a perforated pipe, characterized in that a flexible joint ring is fitted externally to a sheath pipe.