JPH0750816Y2 - Positioning tool for buried pipe for communication line - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a duct sleeve provided on an outer wall of a manhole, in which a pipe end of an embedded pipe inserted from the outside of the manhole
The present invention relates to a positioning tool (hereinafter, also simply referred to as a positioning tool) for a buried pipe for communication wire insertion for positioning at a specified distance from an inner end of a manhole of a duct sleeve.

[Prior Art] When a communication cable is buried in the ground, the communication cable is generally covered with a buried pipe in order to avoid a trouble in which the communication cable is cut off by an external load. Concretely, the buried pipe is constructed by arranging a fixed length of buried pipe along this moat in a ditch formed by excavation, and connecting the joints of these buried pipes with a joint pipe to form a series of pipelines. I am trying to do it.

A manhole for maintenance / inspection of the cable or pulling up of the cable is constructed at a predetermined distance along the cable laying route. Therefore, one conduit is formed between the manholes.

A duct sleeve is provided in the manhole so as to pass through the side wall thereof, and the pipe end of the buried pipe constituting the end side of the pipe line is accommodated in the duct sleeve.

By the way, when inserting this buried pipe, the current construction standard stipulates that the buried insertion end is fixed at a fixed distance from the inner end of the manhole of the duct sleeve. Therefore, in the conventional method, positioning was performed while measuring the distance from the end of the duct sleeve pipe inside the manhole to the insertion end of the buried pipe with a measuring instrument (scale, etc.).

[Problems to be Solved by the Invention] However, in the positioning of the buried pipe end by the conventional method, variations tend to occur due to the sensory element of the operator, and there is a problem that rigorous positioning requires a lot of time. It was Particularly, in the case of so-called divided piping in which a plurality of laying lines are connected to one manhole, the positioning work is very complicated, and the problems of construction quality and work time become more remarkable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel positioning that can easily and accurately position the buried pipe end in order to solve the above problems.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a pipe sleeve inserted through a manhole wall into a duct sleeve that is inserted from the outside of the manhole. A positioning tool for a buried pipe for communication wire pulling, which stops at a position at a specified distance from the inner surface of the wall, has an engagement surface that engages with the inner surface of the sleeve and a flange of the inner surface, and defines the above from the inner surface of the manhole wall. It comprises a tool main body having a stop surface at a distance position, and a wedge means for expanding the tool main body radially outward of the sleeve and detachably fixing it to the sleeve.

[Operation] When attaching the positioning tool to the duct sleeve,
First, the tool body is inserted into the duct sleeve and set in a position where it engages with the flange. After this setting, the fixing means is operated to expand the tool body outward in the radial direction, and the engagement surface of the tool body is tightly engaged with the flange and the inner surface of the duct sleeve to be fixed. As a result, a stop surface for stopping the pipe end of the embedded pipe inserted in the duct sleeve is formed at a position at a specified distance from the end face in the manhole, and the pipe end of the inserted embedded pipe is accurately And it is positioned quickly.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, 1 is a manhole wall formed by placing concrete on the wall surface of a shaft formed in the ground 2.

A tubular duct sleeve 3 is attached to the manhole wall 1 so as to penetrate the manhole wall 1. The duct sleeve 3 is made of vinyl chloride, and one end of the duct sleeve 3 is arranged so as to be aligned with the inner surface 1a of the manhole wall 1 and the other end thereof is attached so as to slightly project from the manhole wall 1 to the underground 2 side. The duct sleeve 3 has a tip 3a on the inner surface 1a side of the manhole wall.
A ring-shaped flange 6 is integrally formed in the vicinity thereof, and a projecting portion 3b on the ground 2 side is formed to have an enlarged diameter so that a ring-shaped packing 7 is fitted to the inner periphery thereof.

A positioning tool 4 is inserted into the duct sleeve 3 from the tip 3a on the inner surface 1a side of the manhole wall, and a buried pipe 5 for communication line made of vinyl chloride is inserted from the outside of the manhole. Abut each other at.

An object of the present invention is to provide a tool capable of accurately and quickly determining the pipe end 5a of the buried pipe 5 inserted into the duct sleeve 3.

Therefore, in this embodiment, the positioning tool 4 is configured as follows.

The positioning tool 4 includes a tool body 8 which is inserted into the duct sleeve 3 and is detachably engaged with the inner surface 3c thereof, and the tool body 8 is expanded radially outward of the sleeve 3 to form an inner surface 3c.
And a fixing means 9 for tightly adhering to.

In the embodiment, the tool body 8 is made of a vinyl chloride plate material having a constant width and a constant length, and two engaging bodies 10 are formed by bending the plate material in an arc shape in the width direction along the inner surface 3c. The concave surfaces 10c are opposed to each other and the concave surfaces 10c are spaced apart from each other by a constant distance, and one end of each of the engaging bodies 10 has an end portion of a U-shaped vinyl chloride elastic member 11 having a predetermined elasticity. Each of them is integrally connected. This elastic member
The outer width of 11 is formed to be slightly smaller than the inner diameter of the duct sleeve 3. The outer peripheral surface 10a of the engaging body 10 has a volume that allows the outer peripheral surface 10a to be in close contact with the inner surface 3c in a state of being engaged with the flange 6, and a concave portion 15 along the curvature direction of the outer peripheral surface 10a.
Is formed. The engaging body 10 is formed such that the tip end 10b in the insertion direction in the engaged state of the recess 15 has a length that matches the specified distance of the embedded pipe insertion end with respect to the duct sleeve 3.

As a result, first, the engaging body 10 is closed against the biasing force of the elastic member 11, and the concave portion 15 of the outer peripheral surface 10a is closed by the flange 6 described above.
Is inserted into the sleeve 3 to a position where
When the urging force is released, the recess 15 engages with the flange 6 and the outer peripheral surface 10a engages with the inner surface 3c. At the engagement position, the tip 10b of the engagement body 10 is embedded in the buried pipe 5.
The tip surface 10b of the engaging body 10 forms a stop surface 4b for preventing further insertion into the tip 5a of the embedded pipe. Here, the concave portion 15 and the outer peripheral surface 10a form an engaging surface 4a for the inner surface 3c.

In the embodiment, the fixing means 9 is formed in a sleeve shape, and its outer diameter is slightly larger than the inner diameter formed by the concave surface 10c of the engaging body 10. In other words, the outer diameter of the fixing means 9 is such that the engaging members 10 are opposed to each other in the radial direction of the sleeve 3 against the biasing force of the elastic member 11 when the engaging members 10 are inserted and fitted between the concave surfaces 10c. The dimensions are set so that the engaging body 10 is integrated with the duct sleeve 3 by opening the legs.
In other words, the fixing means 9 becomes a detachable wedge means for the tool body 8. The elastic member 11 and the fixing means 9 are connected by a string 14 having an appropriate length so that a pair of tools can always be constructed with the tool body 8. Reference numeral 13 denotes a stopper formed on the concave surface 10c so as to project inward in the radial direction, and stops the insertion end of the fixing means 9 at an appropriate insertion position.

Next, the operation of this embodiment will be described.

When inserting the buried pipe 5 into the duct sleeve 3, the positioning tool 4 described above is mounted on the duct sleeve 3.
In mounting the positioning tool 4 on the duct sleeve 3, the tool body 8 is inserted into the sleeve 3 to engage the engaging body.
The tool body 8 is fixed to the sleeve 3 by inserting the fixing means 9 between the engaging bodies 10 and 10 after aligning the recesses 15 of the 10, 10 with the position of the flange 6 on the inner surface 3c of the sleeve. As a result of mounting the positioning tool 4 on the duct sleeve 3 in this way, the pipe end 5a of the embedded pipe 5 inserted into this sleeve 3
Comes into contact with the stop surface 4b of the tool body 8 to prevent the embedded pipe 5 from being inserted further than this.

Therefore, the pipe end 5a can be positioned quickly and accurately without measuring the distance from the inner surface 1a of the manhole wall to the buried pipe end 5a, and the working efficiency is significantly improved.

The positioning tool 4 is removed after the pipe end positioning work is completed by removing the wedge member constituting the fixing means 9 from between the engaging bodies 10, 10.

Further, by preparing a dedicated positioning tool for each duct sleeve of various sizes, the operator can select and use desired positioning from these positioning tools.

Further, the tool body and fixing means constituting the positioning tool are not limited to those made of vinyl chloride, and may be made of steel or the like as long as they have a predetermined elasticity.

[Effects of the Invention] In summary, according to the present invention, it is possible to quickly perform accurate positioning of the buried pipe with respect to the duct sleeve, and it is possible to improve the work quality and significantly reduce the work time. Play.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention. In the figure, 1 is the manhole wall, 1a is the inner surface of the manhole wall, 3
Is a duct sleeve, 3c is an inner surface of the sleeve, 4 is a positioning tool, 4a is an engaging surface, 4b is a stop surface, 5 is a buried pipe, 5a is a pipe end,
6 is a flange, 8 is a tool body, and 9 is a fixing means (wedge member).

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A communication line is drawn to stop a pipe end of an underground buried pipe inserted from the outside of the manhole in a duct sleeve mounted through the manhole wall at a position at a specified distance from the inner surface of the manhole wall. A tool for locating an embedded pipe for use in a tool, the tool body having an engagement surface for engaging with the inner surface of the sleeve and a flange of the inner surface, and having a stop surface at a position of the specified distance from the inner surface of a manhole wall, and the tool body. And a wedge means for releasably fixing to the sleeve by expanding it radially outward of the sleeve.