JP2000240866A - Joint ring for concrete pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop water at the tip end part and the rear part of a joint part of a concrete pipe, so as to prevent slipping off of a joint ring by mutually connecting a first hollow rubber ring and a second hollow rubber ring through a connecting rubber belt ring. SOLUTION: A joint ring is composed of a first hollow rubber ring 2, a second hollow rubber ring 3, and a connecting rubber belt ring 4. A plurality of protrusions 6, 7 are erected and protruded from outer peripheral surfaces of the two hollow rubber rings 2, 3. The plurality of protrusions 6, protruded to the first rubber ring 2, are protruded slantly to the second hollow rubber ring 3 side. The plurality of protrusions 7 protruded to the second hollow rubber ring 3 are erected and protruded vertically. Two hollow rubber rings 2, 3 are connected to each other by the connecting rubber belt ring 4. Especially, the cross-sectional shape of the joint ring is formed into a substantially H-shaped with recessed upper and lower surfaces of a center part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint ring which is used by being attached to a joint part of a concrete pipe, and more particularly to a double joint capable of stopping water at a joint part of a concrete pipe and preventing the joint ring from coming off. At the same time, it is possible to prevent the joint rubber from coming out most easily, to prevent the concrete pipe from coming out when curved or piping in a curved shape and to complete and improve the water stoppage. The present invention relates to a concrete pipe joint ring which can be easily manufactured.

[0002]

2. Description of the Related Art Conventionally, as a method of stopping water at a joint portion of a concrete pipe, as shown in FIG. 4, for example, a fitting is made around a male end 51a of a concrete pipe 51 and a female end 52a of a concrete pipe 52. There are a method of attaching a rubber ring 54 to the inner surface of the front end of the collar 53 to be combined, and a method of attaching various rubber rings directly to the male end 51a of the concrete pipe 51 as described later.

The inner rubber ring 54 at the tip of the collar 53 described above.
When the collar 53 is fitted to the male end 51a of the concrete pipe 51, the rubber ring 54 easily falls off. Rubber ring 54 is color 53
Means for bonding to the inner surface with an adhesive have also been implemented, but especially for large-diameter pipes, the bonding work is extremely time-consuming and inefficient, and if not firmly bonded and fixed, the aforementioned There is a problem that the rubber ring easily falls off.

In order to improve the problem of the method of mounting the rubber ring 54 on the inner surface of the collar 53, for example,
As shown in JP-A-5-59893 and JP-A-58-111495, a method has been developed in which a rubber ring for stopping water is fitted to and attached to the male end of a concrete pipe.

[0005] In each of these techniques, a narrow rubber ring for waterproofing is fitted to a waterproofing step provided at a male end,
Alternatively, this is a technology of a structure in which a narrow rubber ring for waterproofing is fitted in a ring groove provided in a waterproofing step at a male side end.

The method of fitting and attaching these rubber rings to the male side end of the concrete pipe can be mounted by utilizing the elastic force of the rubber rings, and the labor and reliability of mounting are good. The outer peripheral surface of the water stop step at the male end is tapered to facilitate removal from the mold during manufacturing. There was a problem of slipping out of the department. For this reason, there is a method of bonding the rubber ring using an adhesive, but there is also a problem that the adhesive acts as a lubricant and slips out when the rubber ring is mounted.

When a ring groove is provided at the water stopping step at the male end, the rubber ring is located at a position farther from the end of the concrete pipe. Had a problem that the bending angle could not be made large.

In order to solve the above-mentioned conventional problems, the present applicant filed a joint of concrete pipes as shown in, for example, Japanese Utility Model Publication No. 2-3029 or FIGS. 5 (A), 5 (B) and 5 (C). The structure has been developed and is already in practical use.

In the technique shown in FIGS. 5A, 5B and 5C, a plurality of ridges 56 are provided on the outer peripheral surface of a wide rubber ring 55 and the inner peripheral surface of the rubber ring 55 is formed. A ring groove 57 is provided substantially at the center of the concrete pipe 51 and the male end 5 of the concrete pipe 51 is provided.
This is a structure in which a convex ring 59 is protruded at a predetermined position of a slip-out prevention groove 58 provided on the outer peripheral surface of 1a. When the wide rubber ring 55 is fitted into the slip-out prevention groove 58, the convex ring 59 is fitted into the ring groove 57 of the rubber ring 55,
This is a technique of a structure in which the rubber ring 55 is prevented from falling off from the male end 51a.

[0010]

However, the structure of the concrete pipe joint shown in Japanese Utility Model Publication No. 2-3029 or FIG. 5 enables the joint part of the concrete pipe to stop water and has a rubber ring. It is possible to get out to some extent, but when the following concrete pipes are curved or when the concrete pipes are piped to the curved part, a wide rubber ring is used. In some cases, there is a problem that the water stopping effect is poor because a part of the water escapes. Further, recently, there is a high demand for a pipe having a high water stopping performance, and there has been a problem that such a demand cannot be met by the conventional technology.

The joint ring for a concrete pipe according to the present invention is a completely new technique developed in view of the above-mentioned many problems in the prior art, and in particular, a first hollow rubber having a plurality of ridges provided on an outer peripheral surface thereof. Forming a joint ring in which the ring and the second hollow rubber ring are connected to each other with a connecting rubber band, and using the joint ring for a joint of a concrete pipe to double-stop the joint. To provide a completely new technology that has a high water-stopping property, prevents the joint ring from falling off from the joint part, and can be used particularly effectively when propelling concrete pipes in curved lines or in curved lines. Is what you do.

[0012]

The joint ring for concrete pipes according to the present invention is a technique for fundamentally improving many of the above-mentioned conventional problems. A first hollow rubber ring and a second hollow rubber ring, on each of which a plurality of ridges are erected and protruded, are arranged in parallel with a predetermined gap therebetween.
A joint ring for a concrete pipe, wherein the first hollow rubber ring and the second hollow rubber ring are connected to each other by a connecting rubber band.

In the first aspect of the present invention, the two hollow rubber rings provided with a plurality of protrusions on the outer peripheral surface are connected to each other by the connecting rubber belt to form a joint ring. By using this joint ring for the part, the joint part can be double-stopped at two points, the tip and the rear, independently of each other.

A plurality of ridges of the two hollow rubber rings of the joint ring are closely attached to the inner surface of the collar fitted to the joint portion of the concrete pipe while maintaining a predetermined width at independent locations. Can be prevented from getting out of the collar. In addition, since the rubber ring requires troubles such as turning up of the rubber ring and a large joining force at the time of insertion, each joint ring is independent, so after one of the joint rings is completely inserted, the next joint ring The above-described trouble can be solved by inserting the ring into the collar.

Since the two hollow rubber rings of the joint ring are hollow inside, the whole is elastic, so that the male end of the concrete pipe can be easily fitted to the collar. At the same time, when the fitting is completed, the two hollow rubber rings are kept at a predetermined interval, and the inner peripheral surfaces of the collars can be pressed independently of each other to more firmly adhere to each other.

Further, even when the concrete pipe is curved or propelled in a curved shape, as described above, the two hollow rubber rings are in close contact with the inner peripheral surface of the collar in a state in which they are independently provided at predetermined intervals. Further, since the joint ring is easily curved by the connecting rubber band at the center, the hollow rubber ring does not fall out of the collar.

Further, since the interior of each of the two hollow rubber rings is formed in a hollow shape, each of them has a large elasticity independently of each other. Therefore, the work at the time of fitting and joining the concrete pipe can be made easy and smooth, and after the fitting, the outer peripheral surfaces of the two hollow rubber rings can be strongly pressed against the inner surface of the collar to make close contact. . In the above embodiment, the two hollow rubber rings are hollow, but when the hardness of the hollow rubber rings is softened, the fitting operation can be performed smoothly without having to be hollow.

The gist of the second invention of the present invention is that the side surfaces of the first hollow rubber ring and the second hollow rubber ring are connected to each other by a connecting rubber band so that the cross section is substantially H-shaped. It is a joint ring for a concrete pipe of the first invention, characterized in that it is constituted.

In the above-mentioned second invention, since the side surfaces of the first hollow rubber ring and the second hollow rubber ring are connected to each other, the cross section of the joint ring is formed substantially in an H shape. I can do it. Therefore, the convex ring provided on the outer peripheral surface of the male end of the concrete pipe can be fitted into the recess at the center of the lower surface of the joint ring, and the joint ring can be more firmly fixed to the male end. .

The gist of the third invention of the present invention is that a plurality of ridges projecting from the outer peripheral surface of the first hollow rubber ring are respectively inclined, and the outer peripheral surface of the second hollow rubber ring is inclined. A joint ring for a concrete pipe according to the first invention or the second invention, characterized in that a plurality of raised ridges are vertically erected.

In the third aspect of the present invention, since the plurality of ridges projecting from the outer peripheral surface of the first hollow rubber ring are respectively inclined, the joint ring fitted to the male end is used. It can be fitted smoothly inside the collar.

Further, since the plurality of ridges provided on the outer peripheral surface of the second hollow rubber ring are erected vertically, these ridges abut on the inner surface of the collar with a large area at right angles to the inner surface of the collar. Therefore, this can increase the friction coefficient of the joint ring with respect to the collar of the second hollow rubber ring, and can prevent the second hollow rubber ring from falling out of the collar.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a front view of a joint ring of a concrete pipe according to the present invention, and FIG. FIG. 2 (A) is a cross-sectional enlarged view of the joint ring of FIG. 1 (A), and FIG. 2 (B) is a side view of the joint ring of FIG. 1 (A);
FIG. 3 is an explanatory sectional view of the use of the joint ring of FIG.

In FIGS. 1A, 1B and 3, 1
Is a joint ring of the concrete pipe according to the present invention,
It is composed of a first hollow rubber ring 2, a second hollow rubber ring 3, and a connecting rubber belt ring 4. The two hollow rubber rings 2, 3
Are each provided with a hollow portion 5 having a predetermined area inside. However, when the hardness of the hollow rubber rings 2 and 3 is softened, the hollow portion 5 can be omitted.

A plurality of ridges 6, 7 are provided on the outer peripheral surfaces of the two hollow rubber rings 2, 3, respectively. First
The plurality of ridges 6 protruding from the hollow rubber ring 2 are
It protrudes from the hollow rubber ring 3 at an angle. And the second
The plurality of ridges 7 protruding from the hollow rubber ring 3 are vertically erected.

The two hollow rubber rings 2 and 3 are connected to each other by connecting rubber bands 4 on their respective side surfaces. Therefore, as shown in FIG. 2A in particular, the cross-sectional shape of the joint ring 1 is formed in a substantially H shape in which the upper and lower surfaces of the central portion are concave.

The joint ring 1 having the above structure is shown in FIG.
As shown in the figure, the concrete pipe 8 can be used by fitting it to the outer peripheral surface of the water stopping step 9a of the male end 9 of the concrete pipe 8. As shown in the figure, a convex ring 10 protruding at a predetermined position on the outer peripheral surface of the water stopping step 9a is fitted into a recess provided on the lower surface of the central part of the joint ring 1 so that the joint ring 1 It is firmly fitted so as not to fall off from the step 9a.

In FIG. 3, reference numeral 11 denotes a collar, which is formed of a steel pipe used for joining the concrete pipes 8 and 12, and is provided on the outer peripheral surface of the female end 13 of the concrete pipe 12. It is fixed.

In the joint ring 1 according to the present invention, since the two hollow rubber rings 2 and 3 are connected to each other and connected to each other by the rubber band ring 4 as described above, the collar 11 is provided on the outer peripheral surface of the joint ring 1. When fitted, these two hollow rubber rings 2 and 3 are in close contact with the inner peripheral surface of the collar 11 in an independent state.

Since the hollow rubber rings 2 and 3 are provided with the hollow portions 5 therein, when the collar 11 is fitted to the joint ring 1, these two hollow rubber rings 2 and 3 are formed. The contraction allows the collar 11 to be fitted easily and smoothly.

After the collar 11 has been fitted, the two hollow rubber rings 2 and 3 may press the ridges 6 and 7 against the inner peripheral surface of the collar 11 by their own elasticity to make them closely adhere. As a result, the joint portions of the concrete pipes 8 and 12 can be stopped twice.

Since the ridges 6 provided on the outer peripheral surface of the first hollow rubber ring 2 are inclined, when the collar 11 is fitted to the joint ring 1, the resistance can be reduced and smooth. . Also, since the ridge 7 provided on the outer periphery of the second hollow rubber ring 3 is vertically erected, the tip end face is
1 can be widely adhered to the inner peripheral surface of the joint 1, thereby preventing the joint ring 1 from coming out of the collar 11.

When the joint ring 1 according to the present invention is used, the two hollow rubber rings 2 and 3 are separately and closely adhered to the inner peripheral surface of the collar 11 at predetermined intervals, and The connecting ring 1 in the center of the collar 11 easily bends, so that even when the above-mentioned concrete pipes 8 and 12 are propelled in a curved manner or when piped in a curved portion, the joint ring 1 comes out of the collar 11 and falls off. Can be prevented. In addition, even when such curved propulsion or curved piping is used, the water stoppage can be effectively maintained.

[0034]

The joint ring for a concrete pipe according to the present invention has the above-described structure and operation, and therefore has the following great effects.

Since the joint ring of the present invention has two independent hollow rubber rings as described above, the joint portion of the concrete pipe can be double-stopped at the front end and the rear end. It is possible to prevent the joint ring from falling off and to more effectively stop water from the joint portion.

In particular, when constructing concrete pipes in a city in recent years, in order to make many shafts for promoting concrete pipes and to pipe concrete pipes underground on narrow roads, it is necessary to promote concrete pipe curves. Although the construction environment for piping in a curved portion is increasing, as described above, by using the joint ring of the present invention, water is independently stopped at two places with a predetermined interval, and the joint ring is By being easily bent by the connecting rubber band provided at the center, the joint ring can be prevented from falling off, and the water stopping effect can be reliably maintained.

When the two hollow rubber rings are made hollow to have elasticity, and when a plurality of ridges provided on one of these hollow rubber rings are inclined, the fitting of the joint portion is made. It can be made easier and smoother, and after the fitting is completed, the outer peripheral surface of the joint ring can be pressed against the inner peripheral surface of the collar to make close contact.

When two hollow rubber rings are connected to each other by a connecting rubber band to form a joint ring having a substantially H-shaped cross section, the joint ring has a recess in the center of the lower surface of the joint ring. By fitting the convex ring provided on the male end of the concrete pipe, it is possible to prevent the joint ring from falling off from the male end.

When a plurality of ridges projecting from one of the outer peripheral surfaces of the two hollow rubber rings are vertically erected, the entire outer peripheral surface at the tip of the ridge may be brought into close contact with the inner surface of the collar. As a result, the water stop at the joint portion can be made more effective, and the joint ring can be prevented from falling off.

[Brief description of the drawings]

FIG. 1A is a front view of a joint ring, and FIG.
Is a longitudinal sectional view thereof.

2 (A) is an enlarged cross-sectional view of the joint ring of FIG. 1 (A), and FIG. 2 (B) is a side view of the joint ring of FIG. 1 (A).

FIG. 3 is an explanatory sectional view of use of the joint ring of FIG. 1 (A).

FIG. 4 is an explanatory view of a conventional water stopping joint pipe having a rubber ring attached to the inner surface of a collar.

5 (A), 5 (B), and 5 (C) are respectively a conventional water-stop rubber ring and an explanatory view of its use.

[Description of Signs] 1 Joint ring 2, 3 Hollow rubber ring 4 Connecting rubber belt ring 5 Hollow portion 6, 7 Ridge 8, 12 Concrete pipe 9 Male end 9a Water stop step 10 Convex ring 11 Collar 13 Female side Ends 51, 52 Concrete pipe 51a Male side end 52a Female side end 53 Collar 54, 55 Rubber ring 56 Ridge 57 Ring concave groove 58 Exit prevention groove 59 Convex ring

Claims (3)

[Claims] A first hollow rubber ring and a second hollow rubber ring having a plurality of ridges protrudingly provided on respective outer peripheral surfaces thereof are arranged in parallel with a predetermined gap therebetween, and these first hollow rubber rings are provided. A joint ring for a concrete pipe, wherein the ring and the second hollow rubber ring are connected to each other by a connecting rubber band. 2. A side surface of said first hollow rubber ring and a side surface of said second hollow rubber ring are connected to each other by a connecting rubber band so that a cross section thereof is substantially H.
The joint ring for a concrete pipe according to claim 1, wherein the joint ring is formed in a mold shape. 3. A plurality of ridges provided on the outer peripheral surface of the first hollow rubber ring, each of which is inclined, and a plurality of ridges provided on the outer peripheral surface of the second hollow rubber ring. 3. The joint ring for a concrete pipe according to claim 1, wherein the strip is vertically erected.