JPH061450U - Sewage manhole fittings - Google Patents

Abstract

(57) [Summary] [Purpose] To fix the pipe joint to the side wall of the manhole, simply by turning the tightening ring and tightening,
Anyone can do it reliably in a short time, there is no gap between the pipe joint and the side wall of the manhole, and it is extremely easy to carry out maintenance after construction such as inspection and repair of the relevant part. Be able to A pipe joint for connecting a branch pipe of a manhole is integrally projectingly provided from an outer peripheral wall of the tubular body portion 11 in a shape that follows a substantially tubular short tubular body portion 11 and an outer peripheral surface of a side wall of the manhole. The flange portion 12 and the screw portion 1 on the outer peripheral surface of the portion of the tubular portion 11 located in the internal space of the manhole.
3 is engraved, a sealing spacer 2 fitted to the outer periphery of the pipe body 11 of the pipe joint body 1, and engraved on the outer peripheral surface of the pipe body 11 of the pipe joint body 1. Screw part 1
3 and a tightening ring 3 that is screwed onto the same.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint for connecting a manhole and a branch pipe, and in particular, a hard vinyl chloride branch for pouring sewage from a general house into a concrete manhole buried for public sewerage. The present invention relates to a sewer manhole fitting suitable for connecting pipes.

[0002]

[Prior art]

 When sewage discharged from ordinary houses is to be discharged into public sewers, a branch pipe into which the sewage discharged from each house is poured is connected to a concrete manhole buried for public sewer use. The sewage collected in the manhole is discharged to the main sewer.

By the way, as a branch pipe for pouring sewage into such a concrete manhole, a pipe made of hard vinyl chloride is usually used, and a pipe joint for branch pipe connection fixed to the side wall of the manhole is used. It is connected to the manhole via. The branch pipe connecting pipe joint used in such a place is made of the same rigid vinyl chloride as the branch pipe, and has a substantially cylindrical short pipe body and a shape along the outer peripheral surface of the side wall of the manhole. It is conventionally known to have a flange integrally projecting from the outer peripheral wall of the pipe body, but in order to fix such a branch pipe connecting pipe joint to a through hole provided in the side wall of the manhole, Conventionally, as shown in FIG. 5a, the gap between the through hole of the side wall 10 of the manhole and its peripheral portion and the pipe joint 4 is filled with an adhesive agent 30 such as mortar, and the pipe joint is formed. After inserting No. 4 into the through-hole, fix the adhesive 30 with the square members 7 and 8 from the inner and outer surfaces of the manhole with the number 9 until the adhesive 30 hardens, or as shown in FIG. 5b. Then, until the adhesive 30 hardens, the number 19 The upper and lower flanges 42 of the pipe joint 4 are fixed or fastened to the outer peripheral surface of the side wall 10 of the manhole.

However, in the case of fixing only with the adhesive agent 30 as described above, the through hole of the manhole and the pipe joint may be deteriorated due to the positional deviation between the branch pipe and the manhole as the years pass after construction. The imperfections will occur in the bond between them, and there will be gaps that allow water to pass through. Therefore, in order to reinforce the bond between the through hole of the manhole and the pipe joint, the flange 42 of the pipe joint 4 is left clamped on the outer peripheral surface of the side wall 10 of the manhole at the number line 19 as shown in FIG. 5b. Alternatively, as shown in FIG. 5c, it is considered that the flange 42 of the pipe joint 4 is fixed to the nut 52 embedded in the side wall 10 of the manhole by the bolt 51.

[0005]

[Problems to be solved by the device]

 However, with regard to any of the above-mentioned reinforcing means, the work in the hole dug to bury the manhole is forced, and therefore the manhole must be widely dug during construction. However, in the case of using the number 19 shown in FIG. 5b, it takes two persons to perform the work, and the life of the number 19 is problematic. Therefore, the bolt 51 shown in FIG. 5c is used. However, since it is difficult to embed and fix the nut 52 in the side wall 10 of the manhole, the nut 52 has not been put into practical use.

Therefore, in order to solve such a problem, as shown in FIG. 6, an inscribed flange 44 inscribed in the inner peripheral surface of the side wall 10 of the manhole is provided at one end. A threaded portion 45 is engraved on the outer circumference of the pipe joint body formed of the short pipe body 43, and the elastic packing 46 and the washer 47 are fitted to the pipe joint body, and then the tightening ring 48 is screwed onto the threaded portion 45. In combination, the inward flange 44 and the tightening nut 48 are used to fix the pipe joint body to the side wall 10 of the manhole by sandwiching the side wall 10 of the manhole via the elastic packing 46 and the washer 47. Some have already been proposed (see Japanese Utility Model Laid-Open No. 3-12088).

This pipe joint strongly tightens the side wall 10 of the manhole by the inscribed flange 44 of the pipe joint body and the tightening ring 48 only by turning the tightening ring 48, so that it can be firmly fixed by extremely simple work. The elastic packing 46 does not cause a gap between the side wall 10 of the manhole and the pipe joint.

However, the portion of the pipe joint where the elastic packing 46, the washer 47, and the tightening ring 48 are attached is located near the outer periphery of the side wall 10 of the manhole, and is buried in the soil after the construction. Therefore, if water leakage occurs due to deterioration of the elastic packing 46 or washer 47 or loosening of the tightening ring 48 after the construction has finished, check the location or check the elastic packing. Since it is necessary to dig up the outer circumference of the manhole each time in order to replace 46 or the like, there is a problem that it is difficult to perform maintenance after construction.

The present invention is intended to solve the problem of the above-described manhole pipe joint, and more specifically, it is located inside the flange and the manhole that are in contact with the outer peripheral surface of the manhole. By sandwiching the side wall of the manhole with the sealing spacer and the tightening ring, the fitting of the pipe joint to the side wall of the manhole can be fixed to anyone by a simple operation of simply turning the tightening ring. However, it can be performed reliably in a short time, and there is no gap between the pipe joint and the side wall of the manhole due to the sealing spacer, and for the maintenance after construction, the outer periphery of the manhole is dug or filled. You do not need to do any heavy work such as repairing, just open the manhole cover and put your hand inside it to mark the relevant part. It is an object of the present invention to provide a pipe joint for a manhole, which can be easily inspected and repaired.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems and to achieve the object, the present invention provides a pipe joint for connecting a manhole and a branch pipe so that a short cylindrical tubular portion and an outer peripheral surface of a side wall of the manhole are provided. A flange portion integrally protruding from the outer peripheral wall of the tubular body portion, and a threaded portion is engraved on the outer peripheral surface of the rear portion of the tubular body portion which is disposed in the internal space of the manhole. The fitting body, the sealing spacer fitted on the outer circumference of the fitting body tube part, and the tightening screwed on the screw part engraved on the outer peripheral surface of the fitting body tube part. The present invention provides a manhole pipe joint for sewage, which comprises an attached ring.

[0011]

[Action]

 Since the sewage manhole pipe joint of the present invention is constructed as described above, the pipe joint main body is inserted from the outside so that the flange portion thereof follows the outer peripheral surface of the side wall of the manhole, and thereby the manhole pipe is inserted. First, after fitting the sealing spacer to the pipe part of the pipe joint main body protruding into the internal space of the, the tightening ring is screwed into the screw part engraved on the outer peripheral surface of the pipe part, When this is turned and screwed in, the side wall of the manhole is tightened by the flange and the tightening ring, and the pipe joint is securely fixed to the side wall of the manhole. Further, at that time, the sealing spacer is strongly pressed against the side wall of the manhole to be deformed, and the gap between the pipe joint body and the side wall of the manhole is completely sealed.

[0012]

【Example】

 Hereinafter, the present invention will be described in more detail based on the description of the embodiments. 1 and 2 show an embodiment of a manhole pipe joint for sewage according to the present invention. The pipe joint main body 1 is integrally formed of hard vinyl chloride, and has a substantially cylindrical short pipe body portion 11 serving as a joint portion of a branch pipe, and an outer peripheral surface of the pipe body portion 11 integrally formed with a wall. And a flange portion 12 that is integrally projected from the.

The flange portion 12 is laterally curved with a curvature substantially the same as the curvature of the outer peripheral surface of the side wall of the manhole, and is provided on the side wall of the manhole so that the flange portion 12 is located outside the manhole. When the pipe joint body is inserted into the through hole, it is shaped so as to follow the outer peripheral surface of the side wall of the manhole. The pipe body portion 11 is located in the inner space of the manhole when the pipe joint body 1 is inserted into the through hole of the side wall of the manhole and the flange portion 12 is aligned with the outer peripheral surface of the manhole. , The screw portion 13 is engraved.

The pipe body 11 of the pipe joint body 1 is first fitted with the sealing spacer 2 as shown in FIG. 2B, and then shown in FIG. The tightening ring 3 is screwed into the threaded portion 13. The sealing spacer 2 is made of an elastic material such as synthetic resin or synthetic rubber, and its front surface 21 is laterally curved with a curvature substantially the same as the curvature of the inner peripheral surface of the side wall of the manhole. It is shaped so as to follow the inner peripheral surface.

The tightening ring 3 is made of a metal material and has a screw 31 engraved on its inner peripheral surface so that the tightening ring 3 can be screwed into the screw portion 13 of the pipe body portion 11 of the pipe joint body 1. At the same time, as shown in FIG. 3a, there are four notches 32 for engaging with the engaging projections 61 of the jig 6 for tightening on the outer peripheral surface thereof at four locations (up to 8). Location).

As a jig for tightening such a tightening ring 3, as shown in FIG. 3b, a connecting portion 62 having a curvature substantially equal to the curvature of the outer peripheral surface of the tightening ring 3, It is suitable to use the tightening jig 6 composed of the engaging projections 61 and the gripping portions 63 provided at both ends of the connecting portion 62, but it is not always necessary that this is the case. .

FIG. 4 shows an embodiment of the above sewage manhole pipe joint fixed to the side wall of the manhole. In the pipe joint body 1, the pipe body portion 11 is inserted into the through hole 10a of the side wall 10 of the manhole from the outside so that the flange portion 12 is located on the outer peripheral surface side of the side wall 10 of the manhole. First, the sealing spacer 2 is fitted to the portion of the portion 11 protruding into the internal space of the manhole, and the tightening ring 3 is screwed into the screw portion 13 formed on the rear outer peripheral surface of the tubular body portion 11. Since the flange portion 12 and the tightening ring 3 are tightened so that the manhole side wall 10 and the sealing spacer 2 are sandwiched, the pipe joint body 1 is securely fixed to the manhole side wall 10. Has been done.

At this time, since the tightening ring 3 is strongly tightened by the jig 6 or the like, the flange portion 12 is in close contact with the outer peripheral surface of the side wall 10 of the manhole, and the sealing spacer 2 is strong. It is deformed by being strongly pressed against the side wall 10, and the gap between the pipe body part 11 of the pipe joint body 1 and the through hole 10a of the side wall 10 of the manhole is completely sealed off by the sealing spacer 2. .

In the sewage manhole pipe joint as described above, the pipe joint body 1 is inserted from the outside of the manhole into the through hole 10a provided in the side wall 10 of the manhole, and the sealing spacer 2 is fitted inside the manhole. Then, the simple operation of simply turning and tightening the tightening ring 3 can securely fix the pipe joint and the side wall 10 of the manhole without causing a gap between the pipe joint and the manhole. It is possible to inspect or repair the area just by opening the lid and putting your hand inside it.

The sewage manhole pipe joint of the present invention has been described above with reference to an embodiment. However, the present invention is not limited to the above embodiment, and is not limited to the scope of the claims. Needless to say, it has various embodiments.

[0021]

[Effect of device]

 With regard to the sewage manhole pipe joint according to the present invention, anyone can securely fix the pipe joint to the side wall of the manhole by turning the tightening ring and tightening it. The sealing spacer does not create a gap between the pipe joint and the side wall of the manhole, and maintenance after construction does not require large-scale work such as digging or refilling the outer circumference of the manhole. By opening the lid of the manhole and putting a hand inside the manhole, it is possible to inspect and repair the location very easily.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a sewage manhole pipe joint according to the present invention.

FIG. 2 is a plan view of the pipe joint shown in FIG.

FIG. 3 is a partial plan view of a tightening ring and a plan view of a jig for tightening the tightening ring.

FIG. 4 is a sectional view showing a state in which the pipe joint shown in FIG. 1 is fixed to a manhole.

FIG. 5 is a sectional view showing each of conventional examples.

FIG. 6 is a cross-sectional view showing an improved example of the conventional example.

[Explanation of symbols]

 1-Pipe Joint Body 2-Sealing Spacer 3-Tightening Ring 11-Pipe Body 12-Flange 13-Screw Part 32-Notch

Claims (2)

[Scope of utility model registration request] 1. A tubular body portion having a substantially cylindrical shape, and a flange portion integrally projecting from the outer peripheral wall of the tubular body portion along the outer peripheral surface of the side wall of the manhole. A pipe joint body in which a screw portion is engraved on the outer peripheral surface of the rear portion arranged in the internal space of the manhole of the body portion, a pipe joint body, a sealing spacer fitted to the outer periphery of the pipe body portion, and a pipe. A sewage manhole pipe joint, comprising: a tightening ring screwed into a screw portion formed on the outer peripheral surface of the pipe portion of the joint body. 2. The sewer manhole according to claim 1, wherein a notch for engaging with a protrusion of a jig for tightening is provided on an outer peripheral surface of the tightening ring. Pipe fittings.