JPH10243538A - Joint for connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for connection which can quickly and easily perform connection of an underground pipe to a connection, and also can be used for a long period. SOLUTION: A joint for connection for connecting an underground pipe 2 to the connection 1 of a hand hole or a manhole or the like is equipped with the first tube member 1 to be fixed to the connection 1 and the second tube member 5 to be fixed outside to the tip of the underground pipe 2, and the first tube member 4 and the second tube member 5 are constituted capably of fitting, and also the first tube member 4 and the second tube member 5 are provided with abutment parts 9 and 5D for checking both shifting to setting and break side after insertion of these first tube member 4 and the second tube member 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting an underground pipe to a connecting portion such as a handhole or a manhole.

[0002]

2. Description of the Related Art For example, the connection joint shown in FIG. 7 has been proposed. This has a collar 20A at the tip
Inner connector 20 having
A cylindrical member 22 comprising an outer connector 21 having a female screw portion 21B formed on the inner surface of the distal end portion for screwing into a male screw portion 20B formed on the outer surface of the base end portion 0, and screwing into the underground pipe 2 A holder 23 to be externally fitted, and a collar 25 for moving the underground pipe 2 to which the holder 23 is externally fitted to a position where the tip of the tube 2 comes into contact with a packing 24 provided in the outer connector 21. doing. Therefore, the case where the underground pipe 2 is connected to the handhole 1 will be described. The inner connector 20 is inserted into the through hole 1A of the handhole 1 from the inside, and the handhole 1 is connected.
By screwing the outer connector 21 to the inner connector 20 from the outside of the through hole 1A, the inner connector 2
No. 20A and flange 21 provided on outer connector 21
A holds and fixes the handhole 1. 26 shown in the figure is a plate-like packing, and 27 is an O-ring. On the other hand, the collar 25 is fitted from the tip of the underground pipe 2 and the holder 23 is screwed along the spiral of the outer surface of the underground pipe 2 in this state. The underground pipe 2 with the holder 23 is inserted into the outer connector 21 so that the end of the pipe 2 comes into contact with the packing 24. Thereafter, the collar 25 is screwed into the screw portion 21C formed on the outer surface of the end of the outer connector 21, and the operation of connecting the underground pipe 2 to the handhole 1 is completed.

According to the above-mentioned means, in order to connect the underground pipe 2 to the outer connector 21 fixed to the handhole 1, not only the collar 25 must be screwed into the outer connector 21 but also. However, it is necessary to use a tool such as a wrench to fully tighten and secure. In particular, when connecting the underground pipe 2 to such a handhole 1, a large number of underground pipes 2 are connected to the handhole 1, which requires a great deal of time and labor for screwing. there were.

[0004] Further, in the case of fixing by screwing, since the tightening force differs depending on the individual or every number of times of tightening, the screwing may be loosened due to vibration caused by uneven settlement, earthquake or the like. In some cases, water may enter the inside of the underground pipe 2 and there is room for improvement.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is intended to solve the problems described above. It is an object of the present invention to provide a connection joint that can be used.

[0006]

According to the present invention, there is provided a connecting joint for connecting an underground pipe to a connecting portion such as a handhole or a manhole. A first tubular member to be fixed, and a second tubular member externally fitted and fixed to the tip of the underground pipe, and the first tubular member and the second tubular member are configured to be able to be fitted and inserted. After the insertion of the first and second cylindrical members, a contact portion for preventing the movement of the first and second cylindrical members toward the fitting / removing side is provided on the first and second cylindrical members, and the connection is established. A joint was constructed.
Therefore, by inserting the other tubular member, the second tubular member, or the first tubular member into the one tubular member, the first tubular member, or the second tubular member, the two are fitted together, and both are provided. It is possible to reliably prevent the two from moving to the fitting / removing side due to the contact action of the contact portion.

[0007] By providing, on the inner surface side of one of the cylindrical members located on the outer side having a large inner diameter, a seal member which is pressed and deformed in the diameter increasing direction by inserting the other cylindrical member located on the inner side having a small inner diameter. Just by fitting the two tubular members together, the gap between the outer surface of one tubular member and the inner surface of the other tubular member can be sealed without any gap via the seal member.

[0008] The contact portion is a ring member having a rectangular cross section fitted into the inner surface groove of the first cylinder member, and a step formed on the second cylinder member so as to contact the end surface of the ring member. And a department.

[0009] By providing a plurality of protrusions along the circumferential direction at a portion of the outer surface of the first cylindrical member which is fixed to the through hole formed in the connection portion, for example, in the through hole formed in the connection portion. When the inserted first cylindrical member is fixed with mortar, an adhesive, or the like, the bonding area can be increased, and resistance can be given to the through hole in the direction in which the first cylindrical member rotates. When the first cylinder member is formed of synthetic resin, a plurality of projections can be integrally formed, which is advantageous not only in terms of manufacturing but also a plurality of separately formed projections on the first cylinder member. Installation work can also be eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a handhole 1 installed as a connecting portion for arranging electric wires collectively underground. The connection portion may be a manhole or another connection box in addition to the handhole 1.

[0011] As shown in FIG.
An underground pipe 2 for accommodating an electric wire is connected via a connection joint 3, and the connection joint 3 is fixed to a through hole 1 </ b> A formed in the hand hole 1 by a synthetic resin. The main components of the first cylindrical member 4 and a second cylindrical member 5 made of synthetic resin whose distal end is insertable into the first cylindrical member 4 and whose base end is externally fixed to the underground pipe 2 are fixed. It is a member. The first cylinder member 4 and the second cylinder member 5 are made of metal, ceramic,
Any material such as hard rubber may be used.

The first cylindrical member 4 includes a cylindrical main body 4A which can be inserted into a through hole 1A formed in the handhole 1, and a substantially trumpet-shaped distal cylindrical portion 4B which is curved outwardly toward the distal end.
It consists of The distal end cylindrical portion 4B is originally formed to be curved so as to extend outward so as not to damage the electric wire when the electric wire is drawn. Then, after being inserted from the inside of the through-hole 1A from the cylinder main body 4A side, the gap between the first cylinder member 4 and the through-hole 1A is filled with mortar and solidified to fix the first cylinder member 4 to the through-hole 1A. Like that. A plurality of rectangular projections 6 are provided along the circumferential direction on a portion of the outer surface of the first cylindrical member 4 which is fixed to the through hole 1A.
(Here, four places) are integrally formed so that the fixed first cylindrical member 4 can provide resistance in the direction of rotation with respect to the through hole 1A. The projection 6 may be integrally formed, or a separately formed projection may be attached to the outer surface of the first cylindrical member 4. Numeral 7 shown in the drawing is an annular raised portion integrally formed before and after the projection 6, and the raised portions 7, 7 can increase the radial holding strength of the first cylindrical member 4, and can also increase the diameter of the first cylindrical member 4 with respect to the through hole 1A. The bonding area can be increased, and an effect of preventing the through-hole 1A from coming off in the insertion direction can be exhibited.

The second cylindrical member 5 has a proximal end portion 5A which can be screwed into the underground pipe 2 having a corrugated cross section and externally fixed thereto.
And a tip 5B that can be inserted into the cylinder body 4A. Then, by inserting the second cylindrical member 5 into the first cylindrical member 4, the second cylindrical member 5 is pressed and deformed in the radially expanding direction to seal the space between the second cylindrical member 5 and the first cylindrical member 4 in a sealed state. An annular seal member 8 made of rubber is fitted in a first circumferential groove 4C formed in the first cylindrical member 4. Further, a second peripheral groove 4D is formed at a position closer to the underground pipe 2 with respect to the first peripheral groove 4C of the first cylindrical member 4, and a ring member made of soft vinyl chloride is formed in the second peripheral groove 4D. A first step portion 5C and a second step portion 5D are formed in the second cylindrical member 5 so as to fit the end 9 and contact the end surface 9A of the ring member 9. Therefore, as described above, the second cylindrical member 5 is connected to the first cylindrical member 4.
, The outer surface of the first step portion 5C deforms the ring member 9 in the radially expanding direction, so that the first step portion 5C can get over the cylinder main body 4A side of the first cylinder member 4, and As a result, the first step 5C presses and deforms the annular seal member 8, so that the first step 5C can get over the cylinder body 4A side of the first cylinder member 4. At this time,
The second step portion 5D of the first cylinder member 4 similarly deforms the ring member 9 in the radially expanding direction, so that the second step portion 5D can get over the cylinder main body 4A side of the first cylinder member 4, The connection between the first cylinder member 4 and the second cylinder member 5 is completed. As described above, by inserting the second cylindrical member 5 into the first cylindrical member 4, the inclined surface 5E of the second cylindrical member 5 located between the first stepped portion 5C and the second stepped portion 5D is sealed. 8 can be elastically deformed in the diameter-enlarging direction and sealed, and the upper and lower wall surfaces of the second step portion 5D can be brought into contact with the end surface 9A of the ring member 9 so that the first cylindrical member 4 to the second cylindrical member 5 It can be surely prevented from being removed. Moreover, since the double step portions 5C and 5D are provided, even if the contact between the second step portion 5D and the ring member 9 is released, the first step portion 5C is attached to the end face of the seal member 8. The first cylinder member 4 is brought into contact with the second cylinder member 5
Can be prevented from falling off. As shown in the figure, by forming a step portion 5F between the base end portion 5A and the front end portion 5B, the first cylindrical member 4 is formed.
When the second tubular member 5 is inserted into the first tubular member 4, the step 5 </ b> F contacts the end of the first tubular member 4.
Excessive entry of the tubular member 5 is prevented, so that sealing and retaining can be reliably achieved.

The case where the underground pipe 2 is connected to the handhole 1 via the connection joint 3 will be briefly described. First, the first cylindrical member 4 is passed through the through-hole 1A with a mortar. Fix it. Next, the second cylindrical member 5 is screwed into the underground pipe 2 while rotating, and the stepped portion 5F
So that the tip of the underground pipe 2 contacts the inner surface of the underground pipe. In this state, the second tubular member 5 is inserted into the first tubular member 4 provided with the seal member 8 and the ring member 9,
The connection is completed in the state shown in FIG.

The sealing member 8 and the ring member 9 provided in the first cylindrical member 4 may be omitted. That is, as shown in FIGS. 3 and 4, the contact portion that contacts the step portion 4 </ b> E formed on the cylinder main body 4 </ b> A of the first cylinder member 4 is the second contact member.
It comprises a step 5G formed at the base end 5A of the cylindrical member 5. Accordingly, by inserting the second cylindrical member 5 screwed and fixed to the tip of the underground pipe 2 into the first cylindrical member 4 fixed to the through hole 1A of the handhole 1 as described above, the step 5G is formed. The stepped portion 4E can be elastically deformed to get over, and as shown in FIG. 3, the stepped portion 4E and the stepped portion 5G come into contact with each other, and
The tube member 5 can be prevented from coming off. In order to close the gap between the end 4F of the first cylindrical member 4 and the corresponding outer surface of the second cylindrical member 5, the portion is wound with a seal tape,
It will be sealed. The first cylindrical member 4 is formed with ridges 7A, 7A having a different shape from the pair of ridges 7, 7 (having a cross section of a mountain shape).
A and 7A are different in shape from the protrusion 6 (the first cylindrical member 4).
A plurality of protrusions 6A (elliptical along the insertion direction) are formed at predetermined intervals in the circumferential direction.

In FIG. 1 to FIG. 4, the first cylindrical member 4 is fixed to the through hole 1A using mortar. However, as shown in FIG. And an inner cylindrical portion 11 having a male screw portion 11B formed on the outer surface of the distal end portion to be screwed into the female screw portion 10B formed on the outer surface of the proximal end portion of the outer cylindrical portion 10. May be. Accordingly, by inserting the outer cylindrical portion 10 into the through hole 1A of the hand hole 1 from the inside and screwing the inner cylindrical portion 11 to the outer cylindrical portion 10 from the outside of the through hole 1A of the hand hole 1, the outer cylindrical portion 10 is formed. The handhole 1 is clamped and fixed between the flange 10A of the inner cylinder 11 and the flange 11A provided on the inner cylindrical portion 11. Reference numeral 12 shown in the figure is a plate-like packing, and 13 is an O-ring. A tubular body 14 is extended from an end of the flange 11A of the inner tubular portion 11, and the tubular body 14 is provided with the above-described seal member 8 and ring member 9.

In addition to the structure in which the connection joint 3 is directly fixed to the through hole 1A, a structure as shown in FIG. 6 may be employed.
That is, the through hole 1A of the handhole 1 is formed in a rectangular shape that is long in the left-right direction, and a plate member 15 that closes the through hole 1A is provided.
Are mounted in a factory or the like, for example, and the plate member 15 on which the first tubular member 4 is mounted is fixed to the through hole 1A of the handhole 1. The through hole 1A of the handhole 1 is formed as a tapered surface whose diameter becomes smaller toward the inner side, and the peripheral edge of the plate member 15 is inclined toward the center toward the end of the through hole 1A so as to contact the tapered surface. Formed on the tapered surface. Therefore, the first hole is formed in the through hole 1A.
After fitting the plate member 15 on which the tubular member 4 is mounted, a pair of left and right plate pieces 16 (only the left one is shown in the figure)
Is fastened to the screw fixing portions 1B provided on the right and left sides of the through-hole 1A with bolts 17 to fix the plate member 1
5 can be fixed to the through hole 1A. The fixing of the plate member 15 to the through hole 1A may be fixed by using a mortar, an adhesive, or the like. First to the plate member 15
The mounting of the tubular member 4 may be fixed by mortar, an adhesive, or the like, or may be fixed by locking or the like. Further, in addition to closing the through hole 1A with a single plate member 15, the first cylindrical member 4 may be closed with a plurality of (two in the figure) plate members 15 individually mounted.

[0018]

According to the first aspect, since the two can be connected only by inserting the other cylindrical member into the one cylindrical member, the connecting portion can be compared with the conventional screwing method. Not only can the underground pipes be connected easily and quickly, but also water does not enter the inside loosely, and can be used well over a long period of time.
Moreover, after the two are connected, it is possible to reliably prevent the two from being disengaged by the contact action of the contact portion.

According to the second aspect, it is possible to seal the two members only by inserting the other member into one member, and it is not necessary to perform the sealing process using a sealing tape. From the point, the connection of the underground pipe to the connection part can be quickly performed.

According to the third aspect, it is possible to reliably prevent the two members from being disengaged by a simple modification in which the step portion abutting on the end face of the ring member is simply formed in the second cylindrical member. .

According to the fourth aspect, the first cylindrical member can be firmly fixed to the through hole of the connecting portion, and the first cylindrical member can be fixed to the through hole by, for example, mortar or an adhesive. The first cylinder member can be securely fixed in a predetermined position with respect to the through hole without rotating the first cylinder member, particularly in a state where the mortar, the adhesive, etc. are almost hardened. It will be advantageous.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a state where a connection joint is connected to a handhole.

FIG. 2 is a longitudinal side view showing a state where a connection joint is connected to a handhole.

FIG. 3 is a vertical sectional side view showing a state in which another type of connection joint is connected to the handhole.

FIG. 4 is a longitudinal sectional side view showing a state where another type of connection joint is connected to the handhole.

FIG. 5 is a vertical sectional side view showing a state in which another type of connection joint is connected to the handhole.

FIG. 6 is an exploded perspective view showing another embodiment in which a connection joint is connected to a handhole.

FIG. 7 is an exploded perspective view showing a conventional example in which a connection joint is connected to a handhole.

[Description of Signs] 1 Hand hole 1A Through hole 1B Screw fixing part 2 Underground pipe 3 Joint 4 First cylinder member 4A cylinder body 4B Tip cylinder 4C First peripheral groove 4D Second peripheral groove 4E Step part (contact Part) 4F end part 5 2nd cylinder member 5A base end part 5B tip part 5C 1st step part (contact part) 5D 2nd step part (contact part) 5E slope 5F step part 5G step part (contact part) 6 Projection 7,7A Raised portion 8 Seal member 9 Ring-shaped member (contact portion) 10 Outer tubular portion 10A Flange portion 10B Female thread portion 11 Inner tubular portion 11A Flange portion 11B Male thread portion 12 Packing 13 O-ring 14 Cylindrical body 15,15A Plate member 16 Plate piece 17 Bolt 20 Inner connector 20A Flange 20B Male screw 20C Base end 21 Outer connector 21A Flange 21B Female screw 21C Screw 22 Tube member 23 Holder 24 Packing 25 Color 26 Packing 27 O ring

Claims (4)

[Claims] 1. A connection joint for connecting an underground pipe to a connection part such as a handhole or a manhole, comprising: a first tubular member fixed to the connection part; and a tip of the underground pipe. A second tubular member externally fitted and fixed, wherein the first tubular member and the second tubular member are configured to be able to be fitted and inserted, and both of the first tubular member and the second tubular member are inserted after the insertion. A contact portion for preventing contact of the first member with the first member.
A connection joint provided on the tubular member and the second tubular member. 2. A sealing member, which is pressed and deformed in a radially increasing direction by inserting the other cylindrical member located on the inner side having a small inner diameter, on the inner surface side of the one cylindrical member located on the outer side having a large inner diameter. The connection joint according to claim 1. 3. The contact portion is formed on a ring member having a rectangular cross section fitted into an inner groove of the first cylinder member, and formed on the second cylinder member so as to contact an end surface of the ring member. The connection joint according to claim 1, comprising a stepped portion. 4. The connection joint according to claim 1, wherein a plurality of protrusions are provided along a circumferential direction on a portion of the outer surface of the first cylindrical member which is fixed to a through hole formed in the connection portion. .