JPS628478Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pipe connection attachment used when connecting an underground pipe to the lower mass of a manhole.

For this type of connection work, prepare a lower part of the manhole with a hole larger than the outside diameter of the underground pipe and a pipe connection attachment to which the underground pipe is attached via a packing. It is conventionally known to adhere this attachment to the lower mass so that the tip of the middle tube fits into the hole (Japanese Patent Laid-Open No. 56-9530).

However, for this connection, it is necessary to prepare a pipe connection attachment that corresponds to the diameter of the underground pipe, so the connection work is time-consuming and the production cost of the attachment increases.

This invention was made in order to solve such drawbacks, and its gist is to provide a pipe insertion hole in the base body, and to form a plurality of sloped parts on the inner circumferential surface of the pipe insertion hole through cutouts. At the same time, an attachment part for the manhole is provided at the corner of the base body, and a part for attaching to the manhole is provided at the corner of the base body, and the part is inserted between the underground pipe and the pipe insertion hole at the peripheral edge of the pipe insertion hole. A pipe connection attachment is provided with a mounting portion to which a packing retaining ring for holding down an annular packing is attached.

Examples of this invention will be described below with reference to FIGS. 1 to 4.

The pipe connection attachment 11 consists of a substantially rectangular base 13. A pipe insertion hole 15 into which an underground pipe is inserted is provided in the center of the base body 13. A large-diameter slope portion 17a and a small-diameter slope portion 17b are disposed intermittently around the inner circumferential surface of the pipe insertion hole 15 via a notch portion 18 formed of a V-groove. In addition, when screwing the attachment 11 onto the lower part of the manhole, the corner of the base 13 is
Elongated holes 21, 21, ... are bored through which the mounting bolts 19, 19, ... (see Fig. 3) are inserted.
Further, on the peripheral edge of the pipe insertion hole 15, there are female threaded insert members 27, 27, . . . for screwing the mounting bolts 25, 25, . It is buried.

Next, an example of the usage state of this pipe connection attachment 11 will be explained based on FIGS. 3 and 4.

In FIG. 3, 31 is the lower part of the manhole, which has already been installed underground. This lower side mass 31 has a through hole 35 in the side wall into which the underground pipe 33 is inserted, and the above-mentioned mounting bolts 19, 19, . .

Next, the pipe connection attachment 11 breaks off the small diameter slope portion 17b of the pipe insertion hole 15 from the cutout portion 18 in order to match the diameter of the underground pipe 33 to be connected. And the elongated hole 2 of this attachment 11
Attachment bolts 1 of the lower side block 31 to 1, 21, ...
9, 19, etc. and insert the attachment 11.
is screwed onto the lower side block 31.

Thereafter, the tip of the underground pipe 33, into which the annular packing 37 and the packing retaining ring 23 are fitted, is inserted into the pipe insertion hole 15 of the attachment 11. Then, attach the mounting bolts 25, 25, ... to the insert members 27, 27,
By tightening the packing retainer ring 2 in a state where the annular packing 37 seals between the outer wall of the underground pipe 33 and the inner wall surface of the pipe insertion hole 15,
3 to the attachment 11.

Note that the gap between the inner wall surface of the through hole 35 in the lower side mass 31 and the underground pipe 33 is filled with mortar 39.

In this usage example, the small-diameter slope portion 17b of the pipe insertion hole 15 was broken off from the cutout portion 18;
This can be adjusted to the diameter of the underground pipe to be connected, and it is not necessarily necessary to break it off.

Since the pipe connection attachment according to this invention is constructed as described above, it is possible to break off the sloped part at the notch part so that the inner diameter corresponds to the thickness of the underground pipe. When connecting underground pipes to side blocks, there is no need to prepare pipe connection attachments according to the diameter of the underground pipes as in the past, making the connection work easier and reducing the production cost of connection attachments. .

In addition, the pipe connection attachment of this invention can support underground pipes of different diameters at appropriate locations, and can easily match the bottom of the inner wall of the underground pipe with the top surface of the bottom mass of the manhole. The structure allows the annular packing inserted between the underground pipe and the pipe insertion hole to be held down by the packing ring, making it easy to maintain watertightness at the connection between the manhole side block and the underground pipe. It has the effect of allowing connections.

[Brief explanation of the drawing]

The drawings show an embodiment of the pipe connection attachment according to the invention, in which Fig. 1 is a front view, Fig. 2 is a sectional view taken along the line - - in Fig. 1, Fig. 3 is a usage state diagram, and Fig. 4 is a diagram showing an embodiment of the pipe connection attachment. 3 is a front view of the packing retainer ring used in FIG. 3. FIG. 11... Attachment for pipe connection, 13...
... Base body, 15 ... Pipe insertion hole, 17a, 17b
... Slope part, 18 ... Notch part, 21 ... Long hole (attachment part to manhole), 23 ... Packing retaining ring, 27 ... Insert member (attachment part of packing retaining ring), 33 ... Underground Tube, 37...Annular packing.

Claims (1)

[Claims for Utility Model Registration] (1) A pipe insertion hole is provided in the base body, and a plurality of sloped portions are provided intermittently around the inner peripheral surface of the pipe insertion hole via notches, A mounting portion for a manhole is provided at a corner of the base, and further,
A pipe connection attachment, which is provided with a mounting part on the peripheral edge of the pipe fitting hole, to which a packing retaining ring for holding down an annular packing inserted between the underground pipe and the pipe fitting hole is attached. (2) The pipe connection attachment according to claim 1, wherein the notch is a V-groove.