JPH08261376A - Joint device for pipe body - Google Patents

Abstract

PURPOSE: To provide a joint device which is so constituted as to firmly intercouple pipe bodies and have flexibility to absorb an external force. CONSTITUTION: Annular grooves 2 and 2a are formed in the outer peripheries of the connection end parts of pipe bodies 1a and 1b and a elastic covering cylinder 3 having protrusions 4 and 5 fitted to the annular grooves 2 and 2a is fitted to the peripheral part thereof. A pair of fastening half-annular bodies 6 and 6 are brought into contact with the outside thereof and a constraining band 10 is fitted in for fastening. The pipe bodies are firmly intercoupled, and also strong against a tension, and flexibly follows an external force, such as a bending, and absorbs a load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention absorbs outwards in all directions such as bending, stretching and rotation applied to a pipe line when connecting pipe bodies such as fume pipes, water pipes, ceramic pipes and plastic pipes. The present invention relates to a pipe joint device for preventing damage to a pipe and a conduit.

[0002]

2. Description of the Related Art Conventionally, various types of joints such as a flange type, a coupling type, and a telescopic type have been used to connect pipes with each other. For this reason, many coupling type joints have been adopted.

By the way, since a pipeline buried in the ground receives an external force in all directions due to an earthquake, subsidence, etc., the joint of the pipe body is required to have a structure capable of absorbing the external force. However, the conventional joints described above are not capable of complying therewith. Therefore, a flexible expansion joint (see, for example, Japanese Utility Model Publication No. 63-29986) has appeared. However, this type not only has a complicated structure and is expensive, but also has a problem that it cannot be used as a joint for a large diameter concrete pipe such as a fume pipe.

The present invention has been made in consideration of the above-mentioned conventional problems, and is based on a coupling type having a simple structure and good workability, and absorbs a complex load such as bending, stretching, twisting or the like. SUMMARY OF THE INVENTION An object of the present invention is to provide a joint device which has good watertightness and can be connected to a strong pipe body.

[0005]

A structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. A joint device according to claim 1 has a plurality of end outer circumferences. Elasticity in which tubular bodies 1a and 1b in which annular grooves 2 and 2a are arranged are joined to each other, and ridges 4 and 5 which are fitted to the annular grooves 2 and 2a are provided on the outer circumferences of the end portions of the tubular bodies 1a and 1b. The covering cylinder 3 made of a material is fitted, and the outside of the covering cylinder 3 is covered with a pair of fastening semi-rings 6 and 6 whose outer peripheral surface is a tapered surface 8 from one end to the other end, and the outside thereof is covered. It is characterized in that the restraint band 10 is pressed and tightened.

The joint device according to a second aspect of the present invention is the joint device according to the first aspect, wherein the tapered surfaces of the fastening semi-rings 6 and 6 are inclined in opposite directions from the central portion in the longitudinal direction to both ends. It is characterized in that it is formed on two tapered surfaces 8a and 8b.

[0007]

In the joint device of the present invention, the tubular bodies 1a and 1b are joined, the covering cylinder 3 is fitted to the connecting portion thereof, and a pair of fastening semi-rings 6 and 6 are applied to the outside thereof to apply the restraining band 10. It is fitted and pressure-welded, and the work can be performed easily and the tubular body 1
The connection between a and 1b can be strengthened.

The covering cylinder 3 has elasticity and flexibility, and the annular grooves 2 and 2 formed on the outer circumferences of the tubular bodies 1a and 1b.
The ridges 4 and 4 and the slanted peripheral strips 5 and 5 are fitted to a, and the slanted circumferential strips 5 and 5 are clamped while the outer sides of the slanted circumferential strips 5 and 5 are pressed by the pressing ridges 7 and 7 of the fastening semi-rings 6 and 6. Therefore, it is in close contact with the pipes 1a and 1b, has good water-stopping properties, prevents water leakage and water intrusion, and has a large drag force against the tensile force. Can be absorbed. Therefore, it is highly adaptable to combined loads due to earthquakes and ground subsidence.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention, and FIGS. 6 to 8 show another embodiment.

1 to 5, 1a and 1b are fume pipes which are connecting pipes, and a plurality of annular grooves 2 and 2 are required on the peripheral surfaces of the ends thereof along the longitudinal direction of the pipes. Are arranged in a row at intervals, and the innermost annular groove 2a is formed in a wide cross-section with a trapezoidal shape.

Reference numeral 3 denotes both tube bodies 1 whose end faces are joined to each other.
A covered tube fitted between the end portions of a and 1b, which is made of a material having elasticity, sealability and flexibility such as rubber or plastic, and the inner periphery of which is joined to the tubular body 1a. , 1
The ridges 4 and 4 which are fitted in the annular grooves 2 and 2 of b are provided around. Then, at both ends of the covering cylinder, slanting inwardly inclined peripheral strips 5 and 5 which project into the wide annular grooves 2a and 2a of the tubular bodies 1a and 1b are provided.

Numerals 6 and 6 are a pair of tightening semi-rings formed in two parts to be fitted on the covering cylinder 3 and are formed longer than the covering cylinder 3, and the inner circumference thereof is the covering cylinder 3. Is formed to have a diameter closely contacted with the outer periphery of each of the inner peripheral sides of the both ends, and pressing ridges 7 and 7 are provided on the inner peripheral sides of the both ends to be joined to the outer sides of the inclined peripheral ridges 5 and 5 of the covering cylinder 3 which are inclined inward. Has been. The outer circumferences of the fastening semi-rings 6 and 6 are formed on the tapered surface 8 such that one end has a small diameter and the other end has a large diameter, and the pin hole 9 is formed on the outer peripheral surface of the small diameter side end. , 9 are provided.

A restraint band 10 is fitted and press-contacted to the outside of the fastening semi-rings 6 and 6. The restraint band 10 has a wedge-shaped cross section, and its inner circumference has a tapered surface 11 corresponding to the taper 8 of the fastening semi-rings 6 and 6.

When connecting the tubular bodies 1a and 1b, the covering cylinder 3 and the restraining band 10 are loosely fitted to one of the tubular bodies 1a (1b) in advance. Then, both tube bodies 1a,
1b are joined to each other, the covering cylinder 3 is covered between their ends, the annular grooves 2 and 2 of the tubular bodies 1a and 1b and the ridges 4 and 4 of the covering cylinder 3 are fitted, and the covering cylinder 3 Inclined peripheral lines 5, 5
Are engaged with the wide annular grooves 2a, 2a. Next, the pair of fastening semi-rings 6 and 6 are covered on the outside of the covering cylinder 3, the restraining band 10 is fitted to the outside, and the tapered surfaces 8 of the fastening semi-rings 6 and 6 are hit by a hammer or the like. , 8 by press-fitting, the tightening half-rings 6 and 6 are tightened so that the covering cylinder 3 is fixed to the two pipes 1
It is pressed against the peripheral surface between the joint ends of a and 1b to be firmly joined elastically and in a watertight state. After tightening, tighten the retaining pins in the pin holes 9 and 9 of the tightening half-rings 6 and 6.
Insert 12 to prevent the restraint band 10 from slipping out.

Next, another embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. In this embodiment, the tubular body 1a,
Since 1b and the covering cylinder 3 are the same as those in the previous embodiment, their explanations are omitted. In this embodiment, the outer peripheral surfaces of the fastening semi-rings 6 and 6 are formed into tapered surfaces 8a and 8b in which both ends have a small diameter and a central portion has a large diameter, and the inclination directions are opposite to each other. There is. Therefore, the restraint band is provided with a pair of restraint bands 10a and 10b so as to be bonded to the both tapered surfaces 8a and 8b, and the tapered faces 11a and 11a corresponding to the tapered surfaces 8a and 8b, respectively.
It has 11b. Further, a suitable number of pin holes 9, 9 are provided at both ends of the fastening semi-rings 6, 6.

In this case, one binding band 10a is loosely fitted to one tubular body 1a and the other binding band 10b is loosely fitted to the other tubular body 1b prior to connecting the tubular bodies 1a and 1b to each other. 3 and the tightening semi-rings 6 and 6 and then both restraining bands 10
a and 10b are taper surfaces 8 of fastening semi-rings 6 and 6, respectively.
It is pressed against a and 8b by hitting or the like. After the press contact, the retaining pins 10a and 10b are prevented from coming out by fitting the retaining pins 12 into the pin holes 9 and 9 of the fastening semi-rings 6 and 6.

Although the above-mentioned embodiment is an example of connecting fume pipes, the present invention is not limited to this, and other concrete pipes, water pipes, gas pipes and other iron pipes, and Is widely applicable to the connection of ceramic pipes, plastic pipes, electric and electric credit pipes, etc.

[0018]

As described above, according to the present invention, a plurality of annular grooves are provided in a row on the outer circumference of the end portion of the pipe body to be connected, and the annular grooves are fitted to the outside of the annular grooves to have elasticity and flexibility. Since the covering cylinder is fitted and the outside of the covering cylinder is tightened by the pair of tightening semi-rings and the restraining band, the structure is simple and the connecting work of the pipes can be performed easily, and the cost is also low. .

In addition, the covering cylinder is restrained by the pipe body in the fitted state of the protrusion and the annular groove, and the outside of both ends thereof is pressed by the pressing protrusion of the fastening semi-ring body, so that it is mechanically strong. It is connected to and can exert a great resistance to tensile force. Further, since the covering cylinder has elasticity and flexibility, it flexibly responds to bending load and absorbs external force, and
It has excellent watertightness due to its close contact with the pipe, and also has a great effect of preventing water leakage and water intrusion.

[Brief description of drawings]

FIG. 1 is a half-cutaway vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a front view showing a main part of the pipes connected to each other.

FIG. 3 is a vertical cutaway view of a half portion of the coated cylinder.

FIG. 4 is a partially cutaway vertical sectional view of the fastening semi-ring body.

FIG. 5 is a half-cutaway vertical sectional view of the restraint band.

FIG. 6 is a half-cutaway vertical sectional view showing another embodiment of the present invention.

FIG. 7 is a partially cutaway vertical sectional view of the fastening semi-ring body.

FIG. 8 is a half-cutaway vertical sectional view of the restraint band.

[Explanation of symbols]

 1a, 1b Tubular body 2, 2a Annular groove 3 Covering cylinder 4 Projection line 5 Inclined peripheral line 6 Tightening semi-ring body 7 Pressing projection line 8, 8a, 8b Tapered surface 9 Pin hole 10, 10a, 10b Restraint band 11, 11a , 11b Tapered surface 12 Locking pin

Claims (2)

[Claims] 1. A cover made of an elastic material in which pipes having a plurality of annular grooves arranged in a row on the outer periphery of an end are joined to each other, and the outer periphery of the ends of the pipes is provided with a protrusion for fitting with the annular groove. The tube was fitted, and the outer side of the covered tube was covered with a pair of fastening semi-rings whose outer peripheral surface was tapered from one end to the other end. Characteristic pipe joint device. 2. The taper surface of the fastening semi-annular body is formed as two taper surfaces whose inclination directions are opposite to each other from the central portion in the lengthwise direction to both ends thereof. Tube joint device.