JPS6033705Y2 - Fixed end of split pipe - Google Patents

Description

[Detailed description of the invention] Field of application of the invention In the installation of communication cables and electric power cables, manholes 10 are usually connected with several pipes 12 as shown in Fig. One cable 14 is installed inside the cable (Fig. 2).

If the diameter of the cable 14 is very small compared to the inner diameter of the conduit 12, a method is adopted in which the conduit 12 is divided and used effectively.

One method is to insert several thin split pipes 16 into the pipe 12 and install one thin cable 14 in each split pipe 16, as shown in Fig. 3. There is.

However, when installing the cable 14 or removing the cable 14 once installed, the split pipe 1
If appropriate means are not taken to secure cable 1,
Due to the friction with 4, it moves to the split pipe line 6.

This idea is to prevent such things from happening.
This relates to a fixed end portion of a split pipe line.

Prior Art 1 As shown by 18 in FIG.
Wrap a lot of PVC tape or iron wire around the end of the
It was shaped into a dumpling and was made to hang at the pipe entrance.

However, this method (1) requires wrapping a lot of tape or iron wire, making it difficult to work; (2) when pulling in or removing the cable 14;
There are drawbacks such as the possibility of misalignment.

The present invention provides a fixed end portion of a split pipe line that does not cause such problems.

Example 1 In FIG. 1, 20 is a fixed plate.

It is disk-shaped as a whole, and its diameter is larger than the diameter of the conduit opening.

For example, it has four circular holes 22.

The diameter of the circular holes 22 is equal to the outer diameter of the divided pipe line 16.

Further, the inner surface 24 of the circular hole 22 is provided with unevenness 26 .

The shape of the unevenness 26 is, for example, a spiral shape like a screw (
(Fig. 6), parallel (Fig. 7), or spaced apart (Fig. 8).

This fixing plate 20 is made of stainless steel, for example.

However, plastic can also be used if it has sufficient mechanical strength.

32 is a wedge.

It consists of a pipe that is not very thick.

The distal end 34 is tapered, and the outer diameter of the cylindrical portion 36 following it is slightly larger than the inner diameter of the divided pipe line 16.

A flange-shaped convex portion 38 is provided at one end.

This wedge 32 is also made of stainless steel or the like.

To assemble the fixed end portion of this split pipe line, first, insert the end of the split pipe line 16 inserted into the pipe line 12 as shown in Figs. Put it inside.

Then, the wedge 32 is driven into the divided pipe 16 until the protrusion 38 hits the fixing plate 20.

Then, the divided pipe line 16 is pushed outward and embedded in the unevenness 26 of the inner surface 24 of the circular hole 22.

The port 40 is fitted onto the fixing plate 20, and its tip is abutted against the inner wall surface 11 of the manhole 10.

Then, when the port 40 is further rotated, the fixed plate 20
is separated from the inner wall surface 11 while holding the divided pipe line 16.

Therefore, depending on how the bolt 40 is turned,
It is possible to make adjustments such as the slack in No. 6.

In addition, 42 is a binding wire, which is used to bundle several divided pipe lines 16 when they are drawn into the pipe line 12 at once.

The end of the bind wire 42 is pulled out into the manhole 10 through the small hole 30, and is wound around the bolt 40 and fixed.

By doing so, the split pipe line 16 will not become loose.

By doing the above, the end of the divided pipe line 16 is formed by the wedge 3.
2 and the inner surface 24 of the circular hole 22, the outer surface of the divided pipe line 16 was wedged into the unevenness 26 as described above, and the protrusion 38 of the wedge 32 was caught on the fixing plate 20. become a state.

Therefore, even if a force in the directions of arrows 44 and 46 (Fig. 11) is applied to the divided conduit 16 when the cable 14 is pulled in or removed, the divided conduit 16 resists with a tensile strength that is approximately the same as its own tensile strength. become able to.

When removing the split pipe line 16, one of the fixing plates 20 (
For example, it is possible to remove only 20A) in FIG. 11 and pull out the binding wire 42 while leaving the other fixing plate 20, 20B attached.

In this way, the divided pipe line 16 can be pulled out without applying excessive force.

Effect of invention (1) The split pipe line 16 is firmly fixed.

(2) Work time is short.

[Brief explanation of the drawing]

1, 2, and 3 are explanatory diagrams related to the application field of the present invention, FIG. 4 is an explanatory diagram of the prior art, and FIG. 5 and the following are related to the present invention. FIGS. 6, 7, and 8 are explanatory diagrams of different shapes of the unevenness 26 formed on the inner surface 24 of the circular hole 22, and FIG. 9 is a front view of the terminal part. , its XX cross section is shown in FIG. FIG. 11 is an explanatory diagram of the direction of force acting on the split pipe line 16. 10: Manhole, 12: Conduit, 16 Two-part conduit, 20
: Fixed plate, 22: Circular hole, 24: Inner surface, 26: Unevenness, 32
: Wedge.

Claims (1)

[Claims for Utility Model Registration] Each circular hole 2 of the fixing plate 20 is made of a disk having a diameter larger than the diameter of the pipe port and is provided with a plurality of circular holes 22.
2, insert the ends of the plurality of split pipes 16 inserted into the pipes 12, press-fit the pipe-shaped wedges 32 into the split pipes 16, and push the split pipes 16 outward. spread it out, and fit its outer surface into the circular hole 22.
A fixed end portion of a split pipe, characterized in that the inner surface 24 of the split pipe is embedded.