JPH0526394Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" This invention relates to a sinking absorption pipe joint for manholes.
A seal that absorbs the occurrence of subsidence in manholes or connecting pipes without significantly bending the pipeline, prevents sewage waste and other solids from stagnating in the pipeline, and is easy to install and effective. The purpose of this invention is to provide a joint mechanism that can form the following.

(Industrial application field) Piping joint mechanism for manholes buried underground.

(Prior Art) When connecting a buried pipe to a manhole buried underground, it has been common practice to seal it using a joint.

That is, as shown in FIG. 7, the manhole 4
The connecting pipe 5 is connected by inserting a sealing material 22 into the insertion hole 21 formed in the sealing material 2.
Various studies have been made regarding the material of No. 2.

(Problem to be solved by the invention) However, in the conventional system as described above, when the manhole or buried pipe sinks, the pipe line set with a natural flow slope easily bends at the joint.
Therefore, the pipe itself is bent at the intermediate joint, as shown in Figure 7, and as a result, filth and other solids 8 stagnate in the bend with the pipe 7, resulting in drainage, etc. obstruct the flow of

Furthermore, the sealing material 22 is set between the insertion hole 21 and the end of the connecting pipe 5 by taking an appropriate compression margin at each construction site. It is not easy to compress and set in this way, and it is necessary to use a special insertion tool and to perform a connection operation that requires a lot of man-hours.

Furthermore, during on-site operations, the compressed state of the seal inserted as described above tends to be uneven, or the seal tends to be misaligned with respect to the insertion hole 21 or the connecting pipe 5, which may lead to leakage. expensive.

Note that it is conceivable to fill adhesive or mortar instead of the elastic sealing material 22 as described above, but in either case, it will be done on-site, and whether adhesive or mortar is used, the insertion holes 21 and 21 can be filled at the construction site. It is difficult to densely fill the space between the connecting pipe 5 and the connecting pipe 5. That is, even if it appears to be solid on the outside, a considerable amount of void must remain inside, resulting in incomplete connection and a high possibility of leakage.

"Structure of the invention" (Means for solving the problem) In a sealing material made of rubber or other elastic material with a joint stage formed in the middle, an insertion part inserted into the opening of a manhole on one side of the joint stage. and a tightening part for the connecting pipe is formed on the other side of the nuclear joining stage, and a thick shoulder part is provided between the joining stage and this tightening part, and a lip part is provided on the outer surface of the insertion part. A subsidence absorbing pipe joint for manholes.

(Function) The insertion portion of the sealing material is inserted and set into the manhole opening so that the joining stage is brought into contact with the outside of the manhole opening.

The connecting tube is inserted into the tightening portion formed on the other side of the sealing material and tightened by the tightening means.

The lip portion formed on the outer surface of the insertion portion engages with the inner surface of the manhole opening to secure the insertion position and prevent leakage of external groundwater and sewage inside the manhole.

The thick shoulder formed between the joining stage and the tightening part reinforces the space between the tightening part and the insertion part, and also provides appropriate flexibility on both sides of the core thick shoulder to prevent sinking. Effectively track and absorb changes over time.

(Example) Specific embodiments of the present invention as described above will be described as shown in the attached drawings.
As shown in FIG. 1, a sealing material 1 made of rubber or other elastic material with a joint stage 12 formed in the middle forms an insertion part 1a for the opening 10 of the manhole 4 on one side of the core joint stage 12, and a joint stage 12. A tightening portion 13 for the connecting tube 5 is formed on the other side of the insertion portion 12, and a thick shoulder portion 14 is provided between the joining stage 12 and this tightening portion 13, and a plurality of lips are provided on the outer surface of the insertion portion 1a. A section 11 is provided.

However, the insertion portion 1 in such a sealing material 1
A rigid reinforcing ring 2 is attached to the inner surface of a,
The adhesive 6 is applied to the outside of the insertion part 1a in the above-mentioned opening 10 of the manhole 4, and the insertion part 1a is inserted in stages as shown in FIG. 4 to be fixed to the opening 10. The connecting pipe 5 is searched for and attached to the attached sealing material 1, wrapped around the tightening band 3 provided on the tightening portion 13, and tightened by the tightening means 10.

That is, according to the present invention, it can be easily installed by a simple insertion operation as shown in FIG. 4, and the lip portion 11 tilts appropriately to facilitate insertion as shown in FIG. A secure connection backed by the reinforcing ring 1 is obtained. The lip portion 11 is tightly bonded to the opening portion 10 (together with the adhesive 6) to effectively prevent leakage of groundwater from the outside and sewage from inside the manhole 4, and the bonding step 12 is in contact with the outer surface of the manhole 4. It keeps the setting position constant and also contributes to preventing the intrusion of groundwater, etc.

The lip portion 11 of the sealing material 1 set as described above exhibits a large frictional resistance against the pulling force of the insertion portion 1a, so that it does not shift after installation, and therefore the adhesive 6 is auxiliary and thereby It is not intended to prevent water leakage or fix, but rather acts like a lubricant when pushing in. One lip part 11 is the first lip part 11.
As shown in the figure, while it is straight in plan, the other lip part 11 has an arc shape that follows the curvature of the manhole circumferential surface, so that a uniform and safe fastening effect can be obtained over the entire circumference. .

A protrusion 15 can be provided on the inner surface of the tightening part 13, and by tightening it with the band 3, the structure shown in FIG.
From the state shown in Figure 5, a tight sealed state is formed as shown in C and D, and even when high-pressure groundwater acts, the connection pipe can be accurately sealed as shown in Figure 5 C. . In addition, when subsidence occurs, the thin layer portions on both sides of the thick shoulder portion 14 bend smoothly as shown in FIG. In this way, a connection relationship is formed that maintains a natural slope, and the above-described operational relationship is maintained with less unreasonable acting force remaining on each member. Even if it is bent as shown in FIG. 5D, the thick shoulder portion 14 can sufficiently withstand groundwater pressure.

It is clear that the above-mentioned connection operation as shown in Fig. 4 is performed by simply inserting the tube end and inserting it in the forward direction along the slope of the lip portion 11, so that it is smoothly located and does not require any special tools. It is.

``Effects of the invention'' As explained above, according to the invention, the connection operation to the manhole opening is easy, a close sealing relationship is ensured, and it has a preferable absorption effect against the occurrence of subsidence, thereby eliminating waste in the pipe. It is a device that can alleviate stagnation such as this and ensure stable distribution relationships, and is a highly effective idea in practical terms.

[Brief explanation of drawings]

The drawings show the technical contents of the present invention, and FIG. 1 is a partially cutaway plan view of the invention, FIG. 2 is a partial vertical sectional view thereof, and FIG. 3 is a partial side view thereof. Figure 4 is an explanatory diagram showing step-by-step the insertion operation of the sealing material, Figure 5 is a partial cross-sectional view analytically showing the working relationship of the sealing material of the present invention, and Figure 6 is when it is submerged. FIG. 7 is a cross-sectional explanatory diagram showing the operational relationships during subsidence in the conventional type, similar to FIG. 6. However, in these drawings, 1 is a sealing material,
1a is its insertion portion, 2 is a reinforcing ring, 3 is a tightening band, 4 is a manhole, 5 is a connecting pipe, 6 is an adhesive, 10 is an opening, 11 is a lip portion, 12 is a joining stage, 13 is a tightening portion, 14 indicates a thick shoulder portion.

Claims (1)

[Scope of utility model registration request] In a sealing material made of rubber or other elastic material with a joining stage formed in the middle, an insertion part to be inserted into the opening of a manhole is formed on one side of the joining stage, and a part for connecting to a connecting pipe is formed on the other side of the joining stage. A sinkage absorbing pipe joint for a manhole, characterized in that a tightening part is formed, a thick shoulder part is provided between the joining stage and the tightening part, and a lip part is provided on the outer surface of the insertion part.