JPS6342231Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention is based on the purpose of blocking each opening on the wall hole end face of a tube wall through-hole tube in which a large number of wall holes are made through the tube wall in the axial direction. It's about structure.

In this type of pipe with wall holes mainly used in sewer pipes, it is necessary to close one part of the wall hole to prevent water from flowing through the wall hole.

(Prior Art) Here, a conventional art of a wall hole closing structure of a pipe with a wall through-hole will be explained.

As a conventional technique, there is a cap structure described in Japanese Unexamined Patent Publication No. 52-52222 with reference to FIGS. 1 to 3 thereof.

This is done by fitting and fixing a cap, which has the same number of protrusions as the wall holes to be fitted into each wall hole opening, on the inner end surface of a ring with the same diameter as the wall hole. , the opening of each wall hole is closed.

Next, as a conventional technique, the above-mentioned Japanese Patent Application Laid-open No. 52-
52222, with reference to FIG. 4,
Alternatively, there is a welded structure shown in JP-A-55-112471.

This welding structure closes the opening of each wall hole by heat-deforming, crushing, and welding the inner and outer wall surfaces of the tube ends of the wall-through-hole tube.

(Problems to be solved by the invention) The above-mentioned conventional cap structure can only be used for pipes with a specific diameter through the pipe wall, and is not versatile.
In addition, since the shape and dimensions of each wall hole opening of a pipe having a specific diameter are rough and uneven in accuracy, it is difficult and time-consuming to fit the cap into the pipe.

In addition, in the conventional welded structure described above, that is, a structure in which the wall holes are crushed and closed, the partition walls between the wall holes become an obstacle, making it difficult to completely crush the holes. There was a problem that the wall hole opening could not be completely closed due to the thinness of the wall hole.

The present invention was made in order to solve the above-mentioned problems. In other words, the purpose of the present invention is to solve the problem even when there are variations in the diameter of the tube wall through-hole pipe and the shape of each wall hole opening. It is an object of the present invention to provide a structure for closing the opening of a wall hole in a pipe with a wall through-hole, which is relatively easy to apply, has great versatility, and is easy to mold.

(Means for Solving the Problems) Next, the configuration of the present invention for achieving the above object will be explained with reference to FIG. 1, which corresponds to an embodiment.

That is, the present invention provides a structure for closing each opening on the end surface of the wall hole of the tube wall hole tube 1 in which a large number of wall holes 1b are opened that completely pass through the tube wall in the axial direction. An annular groove 3 consisting of a concave groove in which the openings of the wall holes are opened in the bottom surface of the wall on the socket side is continuously cut in the circumferential direction, and at the inner end of the annular groove. In this case, the ring 4 is inserted and the outer circumferential wall 5 and the inner circumferential wall 6, which form the inner and outer circumferential walls of the end opening portion of the annular groove, are crushed and welded together by deformation based on the heating and pressing. The wall hole closing structure of the tube wall through-hole tube is characterized by the following.

(Function) In the above structure, the opening of each wall hole 1b is closed by a ring 4 regardless of its shape, and this ring 4 is held by welding to the annular groove 3 to prevent it from coming off.

(Example) The present invention will be described below based on an example shown in the drawings.

FIG. 1 shows an embodiment of the present invention. In the closing structure of the embodiment, an annular groove 2 (described later) (see FIGS. 2 and 3 An annular space 3 is formed by the deformation of the annular space 3, and a ring 4 formed by an elastic O-ring made of a material such as rubber, synthetic resin, water-expandable rubber, or synthetic resin is formed in the annular space 3. is fitted.

Thus, the outer circumferential wall 5 of the annular space 3 is in a state of being superimposed and welded to the inner circumferential wall 6 by crushing deformation (described later), thereby preventing the ring 4 from coming off.

Note that the end of another wall-through-hole pipe 1' to be jointed is inserted into the inner hole of this socket 1a.

FIG. 2 to FIG. 5 are diagrams showing the manufacturing process of the above closed structure, and the manufacturing process will be explained with reference to these. That is, the closing structure of the embodiment configured as described above is formed in the following order from the pre-process of molding the socket 1a of the tube wall through-hole pipe 1 to the molding process.

(a) Ring groove drilling (see Figures 2 and 3) As a pre-process for socket forming, holes are drilled into each wall hole 1b on the end surface of the workpiece side of the pipe wall through-hole pipe 1 (straight pipe at this point). A communicating annular groove 2 is bored.

Note that the groove wall of the annular groove 2 is tapered outwardly.

(b) Ring insertion (see Figure 4) In the first half of molding the socket 1a, the mandrel 7
First, the inner circumferential surface of the socket 1a is formed to have an enlarged diameter.Finally, the ring 4, which has been fitted onto the mandrel 7 in advance, is pushed deep into the annular groove 2.

Note that during this step, the tube body is in a heated and softened state, so the operation of pushing the ring 4 is easy.

(c) Smashing of the opening of the annular groove (see Figure 5) In the latter half of the molding process of the socket 1a, the outer peripheral surface of the socket 1a is pressed and molded by the outer mold 8, but at this time, the annular groove 2 The outer peripheral wall 5 of is crushed and the inner peripheral wall 6
The annular space 3 is formed by polymerization.

In the closing structure of the embodiment formed in this way, since the ring 4 is crimped between both the peripheral walls 5 and 6 in the step c, each wall hole 1b is reliably closed at the tip of the socket 1a. It is sealed and also prevented from coming off by the outer peripheral wall 5.

In addition, since the device is formed at the same time as the socket 1a is molded, processing and assembly of the device does not require much effort, and the device formation can be automated.

(Effects) As described above, according to the wall hole closing structure of the tube wall through-hole tube according to the present invention, the annular groove formed by the concave groove formed on the end surface of the tube wall on the socket side of the tube wall through-hole tube. The ring is inserted into the ring groove, and the ring is held in place by pressing and deforming the inner and outer circumferential walls of the annular groove, so the ring can be held in place regardless of the diameter of the tube through the tube wall or the shape of each wall hole. This ensures that the wall hole is sealed and is highly versatile. Furthermore, due to the sealing of the ring, the deformation of the inner and outer circumferential walls of the annular groove is as simple as preventing the ring from coming out.Moreover, since the middle interior of the inner and outer circumferential walls is cut out in the shape of a concave groove, the manufacturing process is easy. It is easy to manufacture, there are fewer defective products, and it has the effect of improving manufacturability and stability of occlusion.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a wall hole closing structure of a pipe with a wall through-hole showing an embodiment of the present invention, and FIGS. 2 and 3 are
Fig. 2 is a front view of the annular groove, Fig. 3 is a sectional view of the same side, Fig. 4 is a processed drawing showing how the ring is inserted, and Fig. 5 is a front view of the annular groove. FIG. 6 is a processing diagram showing a state of crushing a groove opening portion. DESCRIPTION OF SYMBOLS 1... Pipe wall through-hole pipe, 1a... Socket, 1b... Wall hole, 2, 3... Annular groove and annular space as annular groove, 4... Ring, 5... Outer peripheral wall, 6... ...Inner wall.

Claims (1)

[Scope of utility model registration request] In a structure for closing each opening on the end face of a pipe with a wall through-hole, in which a large number of wall holes are made that extend completely through the pipe wall in the axial direction, the end face on the socket side of the wall of the pipe with a wall through-hole, An annular groove consisting of a concave groove through which each opening of the wall hole is opened is continuously cut in the circumferential direction on the bottom surface, and a ring is inserted into the inner end of the annular groove. , an outer peripheral wall and an inner peripheral wall forming the inner and outer peripheral walls of the end opening portion of the annular groove are crushed and welded to each other by deformation based on heating and pressing. Pore-blocking structure.