JPH10248150A - Connecting structure of underground buried pipe to connection part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure, of an underground buried pipe to a connection part, by which the underground buried pipe can be connected to the connection part easily and quickly, which can be used satisfactorily for a long period and which is low-cost. SOLUTION: In the connecting structure of an underground buried pipe to a connection part, an underground buried pipe 2 is connected to the connection part 1 at a handhole, a manhole or the like. In the connecting structure, an outside coupling member 3 which is externally fitted freely and an inside coupling member 4 which is internally fitted freely are installed at the underground buried pipe 2. In a state that the tip of the underground buried pipe 2 to which the outside coupling member 3 is externally fitted is inserted into a through hole 1A formed in the connection part 1, the outside coupling member 3 is moved to the tip side of the underground buried pipe 2. The inside coupling member 4 is internally fitted to the tip of the underground buried pipe 2. When the outside coupling member 3 and the inside coupling member 4 are moved to the side of the through hole 1A, pressure parts 3B, 4B by which an adhesive S which is coated on the outer face at least of the underground buried pipe 2 is moved to the side of the through hole 1A in the connection part 1 are provided at both coupling members 3, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As a structure for connecting an underground pipe to the above-mentioned connecting portion, for example, the structure shown in FIG. 5 has been proposed. This is an inner connector 20 having a flange portion 20A at the tip,
A female screw portion 21B is formed on the inner surface of the distal end portion so as to be screwed into a male screw portion 20B formed on the outer surface of the proximal end portion of the inner connector 20.
Member 22 comprising an outer connector 21 formed with
And a holder 23 fitted externally by screwing into the underground pipe 2, and a position where the tip of the underground pipe 2 fitted with the holder 23 contacts a packing 24 provided in the outer connector 21. And a collar 25 for moving the same. Therefore, the case where the underground pipe 2 is connected to the handhole 1 will be described.
Is inserted into the through hole 1A of the hand hole 1 from the inside, and the outer connector 21 is screwed into the inner connector 20 from the outside of the through hole 1A of the hand hole 1, so that the flange portion 20A of the inner connector 20 and the outer connector 21 are connected. The handhole 1 is clamped and fixed with the provided flange portion 21A. 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 to which the holder 23 is attached is connected to the outer connector 21 so that the end of the pipe 2 contacts the packing 24.
Insert inside. 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 means, the first connector 21 for fixing the outer connector 21 and the inner connector 20 to the handhole 1 is provided.
Not only the fixing operation and the second fixing operation for connecting the tip of the underground pipe 2 to the outer connector 21 are required, but also the fixing force and the collar when the outer connector 21 and the inner connector 20 are screwed into the outer connector 21. Since this is due to the screwing force when screwing the 25 into the outer connector 21, it is necessary to use a tool such as a wrench to tighten the screw as much as possible in order to securely screw it in, and the connection work is troublesome and troublesome. there were. In particular, when connecting the underground pipe 2 to such a handhole 1,
A large number of underground pipes 2 are to be connected to the handhole 1, and the connection work requires a great deal of time and labor. Further, since the underground pipe 2 is fixed via the outer connector 21 and the inner connector 20 fixed to the handhole 1, the outer connector 21 and the inner connector 20, as well as the collar 25, the holder 23, etc. A large number of members were required, and the cost was high.

[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.

Further, between the flange 21A of the outer connector 21 and the wall of the handhole 1, between the flange 20A of the inner connector 20 and the wall of the handhole 1, and between the tip of the underground pipe 2 and the outer connector. Since the seal structure is interposed at each of the three positions between the seal members 21 and 21, there is a disadvantage that the cost increases due to an increase in the number of the seal members and a problem that the workability deteriorates in which all the three positions must be securely sealed. Had occurred.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is intended to solve the problems described above. Another object of the present invention is to provide a connection structure of an underground pipe to a connection portion which can be connected at a low cost.

[0007]

According to the present invention, there is provided a connection structure of an underground pipe to a connection for connecting an underground pipe to a connection part such as a handhole or a manhole. A through hole formed in the underground pipe, wherein an outer connecting member and an inner connecting member which can be externally fitted to the underground pipe are provided, and a tip of the underground pipe into which the outer connecting member is externally fitted is formed in the connecting portion. The outer connecting member is moved toward the distal end of the underground pipe while the inner connecting member is inserted into the distal end of the underground pipe, and the through-holes of the outer connecting member and the inner connecting member are inserted. The connecting members are provided with pressing portions for bringing at least the adhesive applied to the outer surface of the underground pipe to the through-hole side of the connecting portion with the movement to the side. When connecting the underground pipe to the connection part, first, the outer connecting member is fitted over the underground pipe. Thereafter, an adhesive is applied to the outer surface of the tip of the underground pipe, and the tip of the underground pipe is inserted into a through hole formed in the connection part. The adhesive may be applied after the tip of the underground pipe is inserted into the through hole formed in the connection part. In this state, the inner connecting member is fitted inside the underground pipe and the outer connecting member is moved to the through hole side of the connecting portion, so that the adhesive applied to the outer surface of the underground pipe is pressed by the pressing portion. Thus, the underground pipe is adhered and fixed to the connection portion by approaching the through hole side of the connection portion from inside and outside. Not only is there no gap between the underground pipe and the through-hole due to the pressing action, but also between the underground pipe and both connecting members, and no adhesive is attached to the hand, There is an advantage that the agent can be filled. The outer connection member and the inner connection member can be fixed to the underground pipe by the excess adhesive applied to the outer surface of the underground pipe or by the adhesive applied to the outer connection member and the inner connection member. At the same time, the outer connecting member and the inner connecting member can be fixed to the wall surface of the connecting portion, and the outer connecting member and the inner connecting member do not come off from the underground pipe.

The underground pipe has a corrugated cross section, an inner connecting member can be screwed inside the underground pipe, and an outer connecting member can be screwed outside the underground pipe. It is composed. Therefore, by forming the inner connecting member and the outer connecting member into a screw-in type, the positions of the two connecting members do not unexpectedly move after the screwing of the two connecting members is completed. Need not be fixed.

The pressing portion is formed so as to be inclined toward the through hole toward the outer peripheral edge thereof, and the outer peripheral edge of the pressing portion is brought into contact with the wall surface of the connecting portion, so that the pressing portion is in a posture substantially along the wall surface. By making it elastically deformable,
Using the restoring force of the pressing portion, the wall surface can be pressed from inside and outside, and the underground pipe can be firmly fixed to the connection portion. In addition, since the pressing portion has a posture substantially along the wall surface, it is possible to prevent the pressing portion from largely protruding from the wall surface.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 4, an underground pipe 2 for arranging electric wires collectively underground is a handhole 1.
Is connected. In the figure, only one underground pipe 2 is connected, but actually a plurality of underground pipes 2 are connected to the handhole 1. In addition to the handhole 1, a manhole or another connection box may be used. These are called connection parts.

A connection structure for connecting the underground pipe 2 to the handhole 1 will be described. As shown in FIG. 1, an outer connecting member 3 and an inner fitting which can be externally fitted to the underground pipe 2. A flexible inner connecting member 4 is provided, and the outer connecting member 3 is grounded in a state where the tip of the underground pipe 2 to which the outer connecting member 3 is fitted is inserted into a through hole 1A formed in the handhole 1. The inner connecting member 4 is moved to the front end of the underground pipe 2 and the adhesive S applied to the outer surface of the underground pipe 2 is passed through the through hole of the handhole 1. The underground pipe 2 is fixed to the handhole 1 by approaching to the 1A side from inside and outside the handhole 1.

The type and amount of the adhesive S are not particularly limited. However, if an adhesive having an elastic force is selected after the adhesive has hardened, vibration generated due to uneven settlement or an earthquake is bonded. There is an advantage that the agent can be absorbed well. In terms of the type of the adhesive S, if the adhesive is viewed broadly, it is used for bonding structural parts such as metal from the viewpoint of use and performance, and a structural adhesive requiring a large adhesive strength and a large adhesive strength Non-structural adhesives that do not require Adhesives can be classified into four types: evaporation type such as solution type and emulsion type, reaction type such as thermosetting type and polymerization type, pressure sensitive type and hot melt type.

The outer connecting member 3 is provided with a spiral flange portion 3B on the inner surface of a main body 3A formed in a cylindrical shape, and an adhesive applied to the outer surface of the underground pipe 2 at the tip of the main body 3A. In order to push and move the agent S toward the through hole 1A side of the hand hole 1, a trumpet-shaped pressing portion 3C that curves outwardly toward the distal end and protrudes toward the distal end is provided. Therefore, by rotating the outer connecting member 3 from the tip of the underground pipe 2, the outer connecting member 3 can be screwed outside the underground pipe 2.

The inner connecting member 4 has a spiral flange portion 4B on the outer surface of a cylindrical main body 4A, and an adhesive applied to the tip of the main body 4A on the outer surface of the underground pipe 2. In order to push and move the agent S and the adhesive S applied to the outer surface of the main body 4A to the through hole 1A side of the handhole 1, the front end side is curved so as to expand outward, and the front end side is oriented toward the main body 4A. 4C. Therefore, by rotating the inner connecting member 4 from the tip of the underground pipe 2, the screw can be screwed into the underground pipe 2. By configuring the inner connecting member 4 as described above, the main body 4 of the pressing portion 4C is formed.
The inner surface 4D of the A-side end can be formed into a shape that is curved outwardly, and when the electric wire is drawn in, the main body 4A of the pressing portion 4C is drawn.
The inner surface 4D at the side end does not damage the electric wire.

The outer connecting member 3 and the inner connecting member 4
May be made of any material as long as it has a shape-retaining property, such as synthetic resin, rubber, metal and the like. And
By forming the outer connecting member 3 and the inner connecting member 4 from a material having elasticity such as synthetic resin or rubber, FIG.
When the outer connecting member 3 and the inner connecting member 4 are screwed into the underground pipe 2, as shown in FIG.
The outer peripheral edge of the wall comes into contact with the wall surfaces 1B and 1C, and the wall surfaces 1B and 1C
Can be elastically deformed to a position along the wall surface 1 by the restoring force of the elastically deformed pressing portions 3C and 4C.
B, 1C can be pressed, and the underground pipe 2 can be firmly fixed to the handhole 1.

The case where the underground pipe 2 is connected to the handhole 1 will be described. First, the outer connecting member 3 is screwed from the tip of the underground pipe 2 so as to be positioned at a predetermined position on the outer surface of the underground pipe 2. The outer connecting member 3 is moved. In this state, after the adhesive S is applied to the outer surface of the underground pipe 2, the tip of the underground pipe 2 is inserted into the through hole 1A of the handhole 1. From this state, the inner connecting member 4 having the adhesive applied to the outer surface from the inside of the handhole 1 is screwed into the tip of the underground pipe 2 (see FIG. 2). After the screwing of the inner connecting member 4 is completed (see FIG. 3), the outer connecting member 3 is subsequently rotated in the opposite direction to the handhole 1 so as to move to the through hole 1 </ b> A side. The adhesive applied to the outer surface of the middle buried pipe 2 is brought to the through hole 1A side of the handhole 1. After the movement of the outer connecting member 3 is completed (see FIG. 4), the adhesive S1 protruding from the inside and outside of the through hole 1A of the handhole 1 is removed, and the connection operation is completed. Then, when the adhesive S is cured, the underground pipe 2 is bonded and fixed to the handhole 1.

The main body 3A of the outer connecting member 3 or the main body 4A of the inner connecting member 4 is provided with a flange 3B or 4B, but has the same sectional shape as the underground pipe 2 which can be screwed into the underground pipe 2. The shape of the main body 3A or 4A itself may be changed to a wave shape. Further, it may be composed of only the main body 3A or 4A formed in a tubular shape that can be fitted to the underground pipe 2. In this case, the underground pipe 2 is not a corrugated cross section, but a main body 3A.
Or you may comprise and implement | achieve cylindrically like 4A. or,
The shape of the pressing portion 3C of the outer connecting member 3 or the pressing portion 4C of the inner connecting member 4 may be other than that shown in the drawing. For example, by forming the pressing portion 3C or 4C so as to be directed 90 degrees outward from the end of the main body 3A of the outer connecting member 3 or the main body 4A of the inner connecting member 4, the process is performed substantially along the wall surfaces 1B and 1C. As a result, the outer or inner surface of the pressing portion 3C or 4C can be brought into contact with the pressing portion 3C or 4C, so that the amount of protrusion of the pressing portion 3C or 4C from the through hole 1A of the handhole 1 can be reduced.

[0018]

According to the first aspect, the underground pipe is directly inserted and fixed by the two members, the outer connecting member and the inner connecting member, so that the number of members can be reduced. At the same time, fix underground pipes as
Since it can be performed all at once without requiring two work steps, the connection of the underground pipe to the connection portion can be performed easily, quickly, and at low cost. In addition, since the adhesive applied to the outer surface of the underground pipe is brought into the through hole side of the connecting part from inside and outside by the pressing action of the pressing part, the underground pipe is fixed to the connecting part. Between the through hole and the underground pipe and both connecting members, not only does not generate a gap, the adhesive does not adhere to the hand, it is possible to fill the adhesive, It can be used in a good condition without water intrusion for a long time. By forming the adhesive from a material having elasticity after curing, for example, there is also an advantage that vibrations and the like generated by uneven settlement or earthquakes can be absorbed.

According to the second aspect of the present invention, since the outer connecting member and the inner connecting member are configured to be screwed, the positions of the two connecting members do not unexpectedly move after the screwing of the two connecting members is completed. It is not necessary to fix both connecting members until the agent is solidified, and the connection work can be facilitated and speeded up from this point as well.

According to the third aspect, the pressing portion is configured to be elastically deformable, and by using the restoring force of the pressing portion, the wall surface can be pressed from inside and outside, and the underground pipe is connected to the connecting portion. It can be firmly fixed, and it is possible to reduce occurrence of peeling or the like over a long period of time. In addition, since the pressing portion is in a posture substantially along the wall surface, it is possible to prevent the pressing portion from protruding greatly from the wall surface, and it is possible to easily inspect the inside of the connection portion and conduct electric wires in the connection portion. There are advantages that can be done.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the shapes of a connecting member and an underground pipe.

FIG. 2 is a vertical sectional side view showing a state where an underground pipe is inserted into a through hole of a handhole.

FIG. 3 is a longitudinal sectional side view showing a state in which an inner connecting member is screwed into an underground pipe.

FIG. 4 is a longitudinal sectional side view showing a state where an underground pipe is connected to a through hole of a handhole.

FIG. 5 is an exploded perspective view showing a conventional member necessary for connecting an underground pipe to a through hole of a handhole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hand hole 1A Through hole 1B, 1C Wall 2 Underground pipe 3 Outer connecting member 3A Main body 3B Flange 3C Pressing part 4 Inner connecting member 4A Main body 4B Flange 4C Pressing part 4D Inner surface 20 Inner connector 20A Flange 20B Male screw Part 20C Base end 21 Outer connector 21A Flange part 21B Female screw part 21C Screw part 22 Tubular member 23 Holder 24 Packing 25 Color 26 Packing 27 O-ring S, S1 adhesive

Claims (3)

[Claims] 1. An underground pipe connecting structure for connecting an underground pipe to a connection section such as a handhole or a manhole, the outer connecting member being capable of being externally fitted to the underground pipe. An inner connection member that can be fitted inside is provided, and the outer connection member is inserted into a through-hole formed in the connection portion while the outer connection member is externally fitted with the tip of the underground pipe. While moving to the distal end side, the inner connecting member is fitted inside the distal end of the underground pipe, and with the movement of the outer connecting member and the inner connecting member to the through hole side, at least on the outer surface of the underground pipe. A connection structure for an underground pipe to a connection part, wherein each of the connection members is provided with a pressing part for bringing the applied adhesive to the through hole side of the connection part. 2. The underground pipe has a corrugated cross-sectional shape, an inner connecting member is configured to be screwable inside the underground pipe, and an outer connecting member is mounted outside the underground pipe. The connection structure of an underground pipe to a connection portion according to claim 1, wherein the connection portion is configured to be screwable. 3. The pressing portion is formed so as to be inclined toward the through hole toward an outer peripheral edge thereof, and the outer peripheral edge of the pressing portion abuts on a wall surface of the connection portion, so that the pressing portion substantially follows the wall surface. 2. An elastically deformable posture.
Or the connection structure of the underground pipe to the connection part of 2.