JPH09105486A - Flexible rubber ring socket for sewerage equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a sewage reservoir from a rubber ring socket having an expansion part situated deep in the socket. SOLUTION: Since when a rubber ring socket 1 having an expansion part 5 formed deep therein is used in a piping joint arranged in a horizontal state, a sewage reservoir is apt to form at the expansion part 5, a ring 9 for support with a lip is arranged in a position closer to the opening 2 side than the stopper part 4 of the rubber ring socket 1. Since the ring 9 for support with a lip peripherally supports a spigot 7 and energizes it against the ring expansion side, a sewage reservoir is prevented from formation, the seal of the spigot 7 is improved, and mounting of a ring is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible rubber ring receptacle for sewerage facilities, and more specifically, a small diameter manhole made of PVC or PP (this is called a plastic manhole).
Alternatively, the present invention relates to a flexible rubber wheel receiving port attached to a small-diameter box.

[0002]

2. Description of the Related Art PVC pipes have been used in sewerage systems since the early 1940's, and the Sewerage Association standards were established in 1974 with repeated achievements. The method of joining the PVC pipe for sewerage is standardized by being divided into adhesive joining and rubber ring joining.

Further, this rubber ring joint is standardized by being divided into two types, a main pipe type and a mounting pipe type, and the rubber ring receptacle for this mounting pipe is provided with a PVC pipe to be inserted into the rubber ring receptacle. It is standardized by being divided into one with an enlarged diameter in the vicinity of the stopper portion with which the tip of the mouth abuts (referred to as a flexible rubber ring receiving opening in this specification) and one without an enlarged diameter. The flexible rubber wheel receiving port is configured to be able to intersect with the pipe axis of the outlet of the PVC pipe within a range of about 5 °. In other words, it has flexibility.

In the sewer system, such a flexible rubber ring receiving port is integrated with, for example, a PVC pipe, a single receiving straight pipe, a 45 ° curved pipe or a branch pipe, or is made of PVC. Integrated with a small-diameter manhole (5-9
6144), it has flexibility, and it is said that this flexibility is effective for earthquake resistance.

Therefore, a flexible rubber ring receiving port applied to the inlet of a vinyl chloride small-diameter manhole was prototyped.

That is, in the schematic view of FIG. 5, the flexible rubber wheel receiving port 1A is provided on the upstream side, the outlet 31 is provided on the downstream side, and
The inspection cylinder receptacles 32 are provided integrally upward.

An inspection tube 33 is connected to the inspection tube receiving port 32, an inner lid 34 is provided on the upper end of the inspection tube 33, and a subsidence prevention plate 35 is provided on the outer periphery of the inner lid 34. The subsidence prevention plate 35 is provided with a protective iron lid 36. The protective iron lid 36 prevents the road load acting on the inner lid 34. This small-diameter manhole is used, for example, on a narrow road.

Now, the flexible rubber wheel receiving port 1A provided in such a small-diameter manhole will be described in detail. In the concrete detailed view of FIG. 6, the manhole body 30 has three
Three flexible rubber wheel receiving ports 1A branched in one direction are provided. These have the same structure, and one of them will be described.

In FIG. 7, the flexible rubber ring receiving port 1A is provided.
Is a rubber ring fitting groove (square ground groove) on the opening 2 side.
3 is formed, and a stopper portion 4 having a reduced diameter is formed on the inner side thereof.
Are formed. The opening 2 is formed near the stopper portion 4.
On the side, a bulging portion 5 whose diameter is expanded from the angular ground groove 3
A is formed. Therefore, the bulging portion 5A expands in a skirt shape from the opening 2 side toward the stopper portion. A rubber ring 6 with a lip is fitted in the angular ground groove 3. By the way, in the case of the flexible rubber ring receiving port 1 having a nominal diameter of 100 mmφ, the inner diameter D1 of the opening 2 is 11
The dimensions are 6 mmφ, the inner diameter D2 of the bulging portion 5A = 126 mmφ, and the axial length L from the opening 2 to the bulging portion 5A = 82 mm.

In a small-diameter manhole using such a flexible rubber wheel receiving port 1A, after installing the small-diameter manhole in advance, when installing an inflow pipe or an outflow pipe, the left and right or up and down directions thereof are installed. If there is a small error, especially in the case of a rubber ring receptacle that is multi-way branched as shown in FIG. 6, since it is a flexible type, this error can be absorbed and joining is not troublesome, It was found that the workability is excellent, and even if there is an earthquake after installation, it is also more earthquake-resistant than the adhesive bonding method.

[0011]

However, the above-mentioned prototype flexible rubber ring receiving port 1A has the following problems.

Originally, the rubber ring joining work is performed as follows. That is, after wiping the inner surface of the rubber ring receiving opening 1A and the outer surface of the insertion opening 7, it is confirmed that the rubber ring with lip 6 is correctly set, and then a lubricant is applied to the surface of the rubber ring with lip 6 and the insertion opening 7. Is applied, these tube axes are aligned, and the insertion port 7 is inserted. Then, the position of the rubber ring 6 with a lip is confirmed with a check gauge. Therefore, since the conventional flexible type rubber wheel receiving port 1A is formed with the bulging portion, the rubber wheel with lip 6 is accurately fitted into the rubber wheel fitting groove (square ground groove) 3 after being inserted. I was a little worried whether I was sick. Especially, in the case of a rubber ring mouth with a multi-way branch, the anxiety was great.

As described above, the flexible rubber wheel receiving port has a bulged portion whose diameter is expanded in the flexible rubber wheel receiving port as compared with the highly reliable adhesive bonding after construction. By having 5A, it is possible to make the pipe axis between the rubber ring receiving port and the pipe opening a certain angle, and although the workability of joining is excellent, when used for a substantially horizontal pipe, Sewage easily collects in the bulging portion 5A. Therefore, as in the above classification, the pipe is often used as a connection port for a mounting pipe having a large angle, and is not preferable as a receiving port for a main pipe, which is often a horizontal pipe.

As described above, generally, the rubber ring receptacle 1
A and the spigot 7 are joined together by manually aligning both tube axes, but since the bulging portion 5A is formed in the flexible rubber ring receiving port 1A, the insertion of the spigot 7 is particularly important. If the outer circumference of the tip is chamfered, the work of aligning both pipe axes is likely to be misaligned.

[0015]

SUMMARY OF THE INVENTION Therefore, the present invention has been made in order to solve the above-mentioned various problems, and the gist thereof is as follows: 1) A seal ring is fitted on the opening side. Of the flexible rubber wheel receiving port, in which a ground groove is formed, a stopper portion with which the tip of the outlet comes into contact is formed on the back side, and a bulge portion is formed on the opening side of the stopper portion, A second ground groove is formed in the bulging portion, and the second ground groove is formed.
In the ground groove of, supporting the outlet in the circumferential direction, and
There is a flexible rubber ring receptacle for sewerage, characterized by fitting a supporting ring biased to the diameter expansion side, and 2) a seal ring with long and short lips on the opening side. A first corner-shaped ground groove to be fitted is formed, a stopper portion with which the tip of the PVC outlet comes into contact is formed on the inner side, and a bulge portion is formed on the opening side from the stopper portion. In the flexible type rubber ring receiving opening, the second portion is formed on the bulging portion.
And a supporting ring that has long and short lips and that supports the outlet in the circumferential direction and that is urged toward the diameter-expanding side is fitted into the second rectangular ground groove. The flexible rubber ring receiving port for sewerage equipment is characterized in that 3) the flexible rubber ring receiving port of claim 1 or 2 is provided at the inflow port of a plastic manhole or a small caliber masque. A flexible rubber ring receptacle for a plastic manhole characterized by the above.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to embodiments thereof. 1 is a sectional view of an essential part of a first example of an embodiment of the present invention, FIG. 2 is a detailed view of an opening support ring of FIG. 1, (A) is a plan view, (B) is (A) ) Is a cross-sectional view taken along line AA, FIG. 3 is a cross-sectional view of a main part of another embodiment, and FIG. 4 is a detailed view of the ring for supporting the outlet of FIG. 3, which are common to the above-described FIGS. 5, 6, and 7. The same reference numerals are given to the parts to be shown, and the illustration and description thereof are omitted.

In the embodiment of the present invention, vinyl chloride (or P
P) Suitable for flexible rubber ring receptacles used in sewerage equipment, especially single-sided straight pipes, 45 ° curved pipes, branch pipes, PVC small bores, and PVC small bores, which are injection molded products. It is conveniently used for a flexible rubber ring receptacle integrally molded in a manhole, etc., and its size is 50 mmφ nominal diameter.
It is designed so that a 400 mmφ outlet can be inserted.

The first embodiment is shown in FIGS. 1 and 2, in which the conventional standardized flexible rubber ring receptacle 1 is
A second rubber ring fitting groove (square ground groove) 8 is formed in the maximum expanded diameter portion of the bulging portion 5, and the second rubber ring fitting groove 8 is formed.
A ring 9 for supporting the outlet as described below is fitted therein. The second rubber ring fitting groove 8 is formed in the opening 2 as shown.
Since the step is formed only on the side, when a force is applied to the insertion port 7 in the pulling direction, the insertion port support ring 9 is fixed to the main body of the flexible rubber wheel receiving port 1 and the insertion port 7 is rubbed. Is hard to come off. In addition, when the insertion port support ring 9 is attached, it can be fixed by inserting it behind this step and pulling it toward you, so that it can be easily attached even in a groping state. Moreover, since the second rubber ring fitting groove 8 is provided in the bulging portion 5, the structure is simple and the molding is easy.

The mouthpiece support ring 9 is made of PE resin, rubber or elastomer and is formed into a C-ring shape (or an O-ring shape). Moreover, due to the elasticity of the resin, two long and short lips 10 are provided. , 11 having a U-packing shape, and the long lip 10 is arranged on the outer peripheral side and the short lip 11 is arranged on the inner peripheral side. The short lip 11 is provided with a large number of cutouts 13 that are cut into the portion that is connected to the long lip 10, that is, the connection portion 12.

Therefore, this outlet support ring 9
Directs the connecting portion 12 toward the opening 2 side and fits in the second angular ground groove 8 without making a gap. At this time, since the outlet support ring 9 which is larger than the inner diameter of the second angular ground groove 8 is formed in a C ring shape, the outer diameter of the long lip 10 can be reduced by slightly reducing the diameter. Comes into close contact with the bottom surface and the side surface of the second angular ground groove 8 and self-tightening action occurs.

Therefore, when the spigot 7 is inserted from the side of the opening 2, the conventional rubber ring with lip 6 is passed over, and the short lip 11 of the spout support ring 9 is slightly bent, and the stopper portion 4 is inserted.
Abut. Then, the drainage flows in the S direction.

Therefore, the tube axes of the flexible rubber ring receiving opening 1 and the insertion opening 7 can be inserted while being straightened, especially while being corrected by the insertion opening supporting ring 9. As a result, the rubber ring with lip 6 is also in the normal posture, and the sealing property is not impaired. The end face of the spigot 7 and the stopper portion 4 of the flexible rubber wheel receiving port 1 are brought into contact with each other without a step, and the spout 7 further covers the inner side of the bulging portion 5 of the flexible rubber wheel receiving port 1. Because,
It can also be used for horizontal piping, because it does not occur even if the sewage collecting part is close to the horizontal angle of inclination of the piping. Since the outlet 7 and the flexible rubber ring receiving port 1 are held by the two ring bodies, they can move freely with respect to vertical rocking due to an earthquake.
Therefore, since the connecting portion is not damaged, it is possible to obtain an effect that the sewage and the like can be drained promptly after the disaster.

When the ring 9 for supporting the outlet is applied to the flexible rubber wheel receiving port 1 of the inlet of a small-diameter manhole made of PVC (plastic manhole), it is particularly advantageous in terms of earthquake resistance. Is good. By the way, the dimensions are the outer diameter of about 140 mmφ and the inner diameter of about 128 mm for the natural body of the spout supporting ring 9.
φ, lip thickness 1.5 mm, long lip 10 length 15
mm, and the length of the short lip 11 is 7 mm.

Next, a second embodiment will be described. Second
Unlike the first embodiment, the second embodiment uses the second rubber ring fitting groove (square ground groove) 8A also as the bulging portion 5 to make the structure simpler and easier to mold. That is, the bulging portion 5
Is formed in the rectangular ground groove, and the axial length of the rectangular ground groove is elongated. Therefore, the long lip 10A of the spout supporting ring 9A is made long and the corrugations 14 are formed in the circumferential direction so that the long lip 10A can be expanded and contracted. The inner and outer protruding portions of the wave are always in contact with the bottom portion of the second angular ground groove 8A and the outer peripheral surface of the outlet 7. The stopper portion 4A also serves as the groove side surface of the second angular ground groove 8A. Further, the short lip 11A of the outlet support ring 9A is formed in a triangular shape in cross section.

The outlet support ring 9 of the second embodiment
According to A, the advantages of the adhesive joining method (for example, durability) in the case of piping with rubber ring joining and pipe axes slightly crossed
Can be brought closer to. In particular, the contact holding between the spout 7 and the spout supporting ring 9A is long in the axial direction, and
Since the pipe axis of the receiving port 1 and the pipe axis of the outlet port 7 are made to coincide with each other because they are intermittently arranged at substantially equal intervals in the circumferential direction, it is possible to prevent the accumulation of dirt.

[0026]

According to the present invention, since the second gland groove is formed in the conventional standardized flexible type rubber ring receiving mouth and the mouthpiece supporting ring is fitted therein, the standard conforming to the standard. Since the outlet can be supported, it is possible to maintain flexibility while adhering to the advantages of the adhesive joining method, and eventually to provide a seismic resistant receptacle.

In other words, due to the supporting ring attached to the bulging portion of the flexible rubber ring receiving port, there is no step between the end face of the outlet and the stopper portion, and the waste container is related to the angle of the pipe. It does not occur, and the outlet and the flexible rubber ring receptacle move freely in response to horizontal and vertical oscillations such as an earthquake, so the connection is not damaged and drainage is drained promptly after the disaster. be able to.

Further, since the supporting ring, which has long and short lips and is biased toward the expanded diameter side, is fitted in the second ground groove, the supporting ring is not removed from the ground groove even when the insertion opening is inserted. There is no slipping out or movement, which in turn saves or facilitates the work of checking the support ring by means of a check ring or the like. Furthermore, if it is provided at the inlet of a plastic manhole or a small-diameter sash, it can be made more earthquake resistant.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a first example of an embodiment of the present invention.

FIG. 2 is a detailed view of the opening support ring of FIG. 1, (A)
Is a plan view and (B) is a sectional view taken along line AA of (A).

FIG. 3 is a sectional view of a main part of another embodiment.

FIG. 4 is a detailed view of the outlet support ring of FIG.

FIG. 5 is a schematic diagram of a prototype example.

FIG. 6 is a detailed plan view of an essential part of FIG.

FIG. 7 is a detailed cross-sectional view of the main parts of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Flexible rubber ring receiving port, 3 ... Gland groove, 4 ... Stopper part, 5 ... Bulging part, 8 ... Second gland groove, 9 ... Outlet supporting ring

Claims (3)

[Claims] 1. A first ground groove into which a seal ring is fitted is formed on the opening side, and a stopper portion with which the tip of the spout comes into contact is formed on the rear side. In a flexible rubber ring receiving opening having a bulging portion on the opening side, a second ground groove is formed in the bulging portion, and the outlet is circumferentially supported in the second ground groove. Also, a flexible rubber wheel receiving port for sewer facilities, characterized in that a supporting ring biased to the diameter expansion side is fitted. 2. A first angular ground groove into which a seal ring with long and short lips is fitted is formed on the opening side, and a stopper portion with which the tip of a PVC outlet contacts is formed on the back side. In the standardized flexible rubber ring receiving port, in which the bulging portion is formed on the opening side from the stopper portion, the second angular ground groove is formed in the bulging portion. A sewerage facility, characterized by fitting a supporting ring, which has long and short lips and has a long and short lip, and which supports the outlet in the circumferential direction and which is biased toward the diameter expansion side, into the second angular gland groove. Flexible rubber ring socket. 3. A flexible rubber wheel receptacle for a plastic manhole, characterized in that the flexible rubber wheel receptacle according to claim 1 or 2 is provided in a plastic manhole or an inlet of a small-diameter masque. .