JPH1163322A - Connecting joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting joint ensuring connecting strength and watertight performance while performing connecting work without using a special jig. SOLUTION: Joint bodies 4 are provided to connect a large number of underground pipes 1 disposed to bury conduit pipes and waterworks and sewageworks, and to be fitted over the mutual butting parts of final underground pipes 1. Both end inner surface of this joint body 4 are formed into taper faces 4B positioned radially outward toward the end part side. In the state of an adhesive 6B being respectively applied to the surface of the connection parts of the butting parts of two underground pipes, the joint body 4 is fitted to the outer periphery of the connection parts, and then a ring member 5 is moved toward the end part of the joint body 4 to push an adhesive 6A into the joint body 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a number of underground buried pipes arranged for burying conduits, water and sewage and the like in the ground, and joining the butt portions of the final buried pipes. The present invention relates to a connection joint for connecting the two.

[0002]

2. Description of the Related Art When laying an underground pipe using the above-mentioned connecting joint, there are many cases where an underground pipe must be piped from both ends of a pipe route due to road conditions or the like. . In particular, in the case of an electric wire joint groove (CC box), special parts (such as hand holes and manholes for branching and connecting cables passing through the inside of the pipe) are installed first,
After that, an underground pipe is laid. In such a case, the connection of the final butted portion of the underground pipes always occurs, and the connection has conventionally been made by the following method.

[0003] After a half-split connecting joint consisting of two members is put on the connecting portion of the final butted portion, it is tightened with a wire or the like to connect the two underground pipes. In this case, the connection work can be performed without using a special jig, etc.However, since the tightening force tightened by the number line etc. varies by the operator, in some cases the connection of both underground pipes is Not only may it come off, but you can not get the required watertightness as expected,
It was difficult to implement.

[0004] Therefore, an annular connecting joint is externally fitted to one of the underground pipes, an adhesive is applied to the surface of the connecting portion of the final butted portion, and the externally fitted connecting joint is connected. By moving the connection portion, the connection portion of the final butted portion and the connection joint are adhesively fixed. In this case, the connection between the connection portion of the final butted portion and the connection joint can be more firmly fixed by the adhesive than by the above-mentioned wire or the like, but the following inconveniences have occurred.

[0005] In other words, when the connection joint is moved over the connection portion to which the adhesive has been applied, a part of the adhesive located at the upper portion is pushed forward in the moving direction.
The entire adhesive is pulled forward in the direction of movement, and the gap between the inner surface of the joint for connection and the outer surface of the joint cannot be filled with adhesive, and the adhesive effect of the adhesive is fully exhibited. However, watertightness could not be sufficiently ensured in some cases.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention is intended to solve the problem that the connection work can be performed without using a special jig or the like, and the connection strength and watertightness are improved. It is another object of the present invention to provide a connection joint capable of ensuring the connection.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to connect a large number of underground pipes provided for burying conduits, water and sewage and the like in the ground, A joint body for externally fitting over the butt portion of the final underground pipe is provided, and inner surfaces of both ends of the joint body are formed as tapered surfaces located radially outward toward the end. In a state where the adhesive is applied to the connection portion surface of the butt portion of the underground pipe, the joint body is externally fitted to the connection portion, and then moved toward the end of the joint body to move the inside of the joint body. Connection joint comprising a ring member for pushing an adhesive into the joint. Therefore, when the joint body is moved to the connection portion to which the adhesive has been applied, the upper portion of the adhesive is pushed forward in the joint body moving direction. As a result, the entire adhesive receives a pulling force forward in the joint body moving direction, and the adhesive on the joint body moving direction rear side of the applied adhesive is sufficiently filled between the joint body inner surface and the connection portion outer surface. Not in a state.
In this state, by moving the ring member toward the end of the joint body from the rear in the moving direction of the joint body, the adhesive can be pushed into the joint body via the tapered surface, and the joint body inner surface and the connection portion The space between the outer surfaces can be filled with an adhesive. The object is achieved only by moving the ring member toward the end of the joint body from the rear in the moving direction of the joint body, but further moving the ring member toward the end of the joint body from the front in the moving direction of the joint body. This allows the adhesive overflowing forward in the moving direction to be pushed into the joint body via the tapered surface, and the gap between the joint body inner surface and the connection portion outer surface can be reliably filled with the adhesive. Further, if a ring member is fixed in advance to the front side in the moving direction of the joint main body with an adhesive, the ring member can be used as a positioning member of the moving position of the joint main body. By forming the tapered surfaces at both ends of the joint main body, the joint main body can be mounted without confirming the mounting direction one by one.

The outer surface of the push-side tip portion of the ring member is formed as a taper surface located radially inward toward the tip portion, and the angle of the taper surface is equal to or smaller than the angle of the taper surface of the joint body. By setting it larger than this, the adhesive can be reliably pushed into the joint body through the tapered surface of the joint body.

[0009] Both ends of the joint body are provided with end faces orthogonal to the pipe axis direction, and when the ring member is pushed into the joint body, the end face between the joint body and the tapered surface of the ring member is provided. By forming a storage portion for storing the extruded excess adhesive, when the adhesive filled in the joint body hardens and contracts, the adhesive in the storage portion is supplied to the joint body side It is possible to suppress a large change in the amount of the adhesive filled in the joint body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a large number of underground pipes 1... Installed in order to collectively arrange electric wires underground are connected from both ends of a piping path to a final underground. Buried pipe 1,
In order to fill the gap between the butting parts 1A, 1A, an adjusting pipe 2 having a length different from that of the underground pipe 1 is arranged, and both ends 2A, 2A of the adjusting pipe 2 and the underground pipe 1, 1 is a side view in which the butting portions 1A, 1A are connected via connection joints 3, 3, respectively.

Each of the connection joints 3 is connected to the underground pipe 1.
And a pair of right and left ring members 5 for pushing an adhesive into the inside of the joint body 4 from both ends thereof. 5. The adhesive used here may be a one-component solvent type quick-drying adhesive, or may be another adhesive.

As shown in FIG. 4, the joint main body 4 has end faces 4A, 4A orthogonal to the pipe axis direction at both ends, and a pipe extends from the inner end of the end faces 4A, 4A to the inside in the pipe axis direction. The tapered surfaces 4B, 4B located radially inward toward the inner side in the axial direction are formed. By providing the end faces 4A, 4A, when the ring members 5, 5 are pushed into the joint body 4, as shown in FIG. , 5 can be formed with a storage portion 7 for storing the excess adhesive 6A extruded between the tapered surfaces 5B, 5B, and the adhesive 6B filled in the region A shown in the figure is hardened. When the volume of the adhesive 6 </ b> B in the area A is reduced due to (solvent volatilization), the adhesive 6 stored in the storage unit 7 is reduced.
A can be supplied into the region A, and the amount of the adhesive filled in the joint main body 4 can be suppressed from greatly changing. The joint body 4 may be configured as shown in FIG. That is, the tapered surfaces 4B of the joint body 4 are formed radially inward from both ends without providing the end surfaces with end surfaces 4A, 4A orthogonal to the tube axis direction.

The ring member 5 is, as shown in FIG.
The outer surface 5B of the pushing-side distal end is formed as a tapered surface located radially inward toward the distal end, and the angle α1 of the tapered surface 5B is set to the taper of the joint body 4 as shown in FIG. By setting the same angle as the angle α2 of the surface 4B, the adhesive can be reliably pushed into the joint body 4 via the tapered surface 4B of the joint body 4. The size of the angle α1 may be set to be larger than the size of the angle α2, or the taper surface 5B may not be formed, but may be applied to both ends of the joint body 4 so as to contact the taper surface 4B. It may be a simple cylindrical ring member 5 having a vertical end face.

The case where the underground pipe 1 and the adjusting pipe 2 are connected will be described. As shown in FIG.
First, an adjustment pipe 2 having the same length as the gap between the left and right underground pipes 1 and 1 is prepared. Hereinafter, only the connection between the right end of the underground pipe 1 located on the left side and the left end of the adjustment pipe 2 will be described. As shown in FIG. 2 (b), the ring member 5 and the joint body 4 are sequentially fitted to the underground pipe 1 from the right end thereof, and the ring member 5 is removed to the adjusting pipe 2 from the right end thereof. Fit. Thereafter, an adhesive 6 is applied to the outer surface of the adjusting tube 2 in order to fix the ring member 5 externally fitted to the adjusting tube 2 at a set position, and the ring member 5 is moved onto the applied adhesive 6. Then, as shown in FIG. 2C, the ring member 5 is fixed at that position.

Next, as shown in FIG. 3A, an adhesive 6 is applied to a connection between the right end of the underground pipe 1 and the left end of the adjusting pipe 2, and then the adhesive 6 is applied onto the adhesive 6. The joint body 4 is moved. At this time, the fixed ring member 5 is
Of the joint body 4, and the adhesive 6 overflowing forward in the moving direction of the joint body 4 can be pushed into the joint body 4. Thereafter, as shown in FIG. 3B, after applying an adhesive 6 between the joint body 4 and the ring member 5 located on the left side, the ring member 5 is moved to the joint body 4 side. A part of the adhesive 6 applied into the joint body 4 can be pushed in.
At this time, since the right ring member 5 is fixed, even if the left ring member 5 is brought into contact with the joint body 4,
The joint body 4 does not move to the right. Then, when the adhesive 6 is cured, the connection work between the right end of the underground pipe 1 located on the left side and the left end of the adjustment pipe 2 is completed.

Although the gap between the left and right underground pipes 1 and 1 is filled by the adjusting pipe 2, when there is no gap between the finally connected left and right underground pipes 1 and 1, Is
Naturally, the ends of the left and right underground pipes 1 and 1 are directly connected to each other. The materials of the underground pipe 1 and the adjusting pipe 2 are not particularly limited. Further, the right ring member 5 mainly used for positioning may be omitted, and the left ring member 5 effective for pushing the adhesive and the joint body 4 may constitute a connection joint.

[0017]

According to the first aspect of the present invention, by providing the ring member for pushing the adhesive into the joint body, the gap between the inner surface of the joint body and the outer surface of the connection portion can be reliably filled with the adhesive. While the pipe connection work can be performed without using special jigs and the like as before,
It is possible to provide a connection joint that can ensure connection strength and watertightness. In addition, since the adhesive force between the ring member and the connection portion and the adhesive force between the joint body and the ring member can be exhibited, the connection strength of the joint for connection can be further increased. In addition, if the ring member is fixed in advance in the moving direction of the joint main body in advance, it can function as a positioning member for regulating the moving position of the joint main body, and the joint main body is always positioned at a predetermined position. There are advantages that can be. In addition, by forming the tapered surfaces at both ends of the joint body, the joint body can be attached without confirming the attaching direction of the joint body one by one, and the attaching work can be facilitated.

According to the second aspect, by forming the tapered surface for pushing the adhesive into the joint body on the ring member, the adhesive can be reliably pushed into the joint body, and the variation by the operator can be improved. Can be avoided.

According to the third aspect, by supplying the adhesive into the joint main body from the storage portion, it is possible to suppress the amount of the adhesive filled in the joint main body from largely changing due to curing. Thus, the effect of bonding can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which an adjustment pipe is inserted into a gap between underground pipes and connected via a connection joint.

FIG. 2 (a) is a side view showing a state immediately before an adjusting pipe is inserted into a gap between underground pipes, and FIG. 2 (b) is an outer fitting of a ring member and a joint body to the underground pipe. FIG. 3C is a partial cross-sectional side view showing a state in which the ring member is externally fitted to the other adjustment tube, and FIG. 4C is a partial cross section showing a state in which the ring member is fixed to the adjustment tube with an adhesive. Side view

FIG. 3A is a partial cross-sectional side view showing a state in which an adhesive is applied to a connection portion surface, and FIG. 3B is a partial cross-sectional view showing immediately before moving the last ring member to the joint body. (C) is a partially sectioned side view showing a connection completed state.

FIG. 4 is a cross-sectional plan view showing a joint body and a pair of ring members.

FIG. 5A is a longitudinal sectional side view showing set angles of a tapered surface of a joint main body and a tapered surface of a ring member, and FIG.
Is a vertical side view showing the state where the adhesive is stored in the storage section.

FIG. 6 is a longitudinal sectional side view showing another embodiment of the joint body.

[Explanation of symbols]

 1 Underground pipe 1A Butt 2 Adjustment pipe 2A End 3 Connection joint 4 Joint body 4A End face 4B Tapered surface 5 Ring member 5B Outer surface (tapered surface) 6,6A, 6B Adhesive 7 Storage area A area

Claims (3)

[Claims] 1. A method of connecting a large number of underground pipes, which are provided for burying conduits, water and sewage, etc., under the ground, and fitting the final underground pipes over the abutting portions. For the joint body, the inner surfaces of both ends of the joint body are formed in a tapered surface that is located radially outward toward the end, and an adhesive is applied to the connection portion surface of the butted portion of the two underground pipes. In a state where the joint body is applied, the joint body is externally fitted to the connecting portion, and then the joint body is provided with a ring member for moving the joint body toward an end thereof and forcing an adhesive into the joint body. Fittings. 2. An outer surface of a pushing-side tip portion of the ring member is formed as a tapered surface located radially inward toward the tip portion, and an angle of the tapered surface is equal to an angle of a tapered surface of the joint body. The connection joint according to claim 1, wherein the connection joint is set to be larger than that. 3. An end face orthogonal to a pipe axis direction is provided at both ends of the joint main body. When the ring member is pushed into the joint main body, the end face of the joint main body and the tapered surface of the ring member are formed. 3. The connection joint according to claim 1, wherein a storage portion for storing the excess adhesive extruded therebetween is formed.