JP2913892B2 - Pipe line switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for transmitting a communication wire to a pipe which has been laid in advance by compressed gas, and more particularly to a pipe changer which can change the connection form of the pipe. .

[0002]

2. Description of the Related Art As a new method of laying an optical fiber cable, the bron fiber method has been disclosed in the document Urban Infrastructure Technology Promotion Conference, Proceedings of the First Technical Research Conference, p. 281 (1989). This method is suitable for wiring in a building or the like, as described in the literature, because it is easy to change or add a wiring form.

[0003] Further, as described in Japanese Patent Application No. 2-234593, when a sensor cable is sent to or recovered from an existing pipeline, a blown cable is also required.
The fiber method is an effective method.

Conventionally, when such a pipe connection is changed, as shown in FIG. 5, the pipe is appropriately cut, and the cut portion is air-tightly connected by a connecting pipe to connect the pipe. The roads are connected. In the figure, 50 is a connection box, 51
Reference numerals 58 to 58 denote pipes, 59 and 60 denote connecting pipes, 61 denotes an extra length storage guide, and 62 denotes a hermetic plug. Unused pipeline 5
3, 54, 55, and 58 are sealed plugs 62 at the end of each pipe.
Is sealed by screwing. The pipes 51 and 56 connect the connection pipe 59 in a gas-tight manner with a tube connector to connect them. The pipes 53 and 57 connect the connection pipe 60 extended along the extra-length storage guide 61 in an airtight manner by a tube connector to connect them. In the case of changing the pipe connection, it has been performed by changing the connection pipe.

In such a conventional method, it is necessary to cut a tube from a connector and connect it to another connector at a connection point every time the connection is changed. In particular, a pipe system used for a sensor cable or the like is required. As described above, applications requiring frequent changes in pipeline connections are complicated and require time-consuming work.

Also, in a wiring system in a building, a place where the above-mentioned conduit connection box is installed is a place with much dust such as a vicinity of a cable duct. Dust may enter the cable and cause problems in cable transmission.

Further, since it is necessary to change the position of the connection pipe in the connection box, there is a problem that the connection pipe is broken or a small-diameter bend having a large resistance is generated.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a pipeline switching device which can easily change the pipeline connection in a closed state. It is assumed that.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a pipe line switching device used in a wire rod laying method for laying a communication wire rod in a pipeline laid in advance with compressed air. At least a part is formed of a flexible member in a closed container having an open conduit end, one end communicates with the outside of the closed container, and the other end is selectively connected to one of the openings. In addition, the other end provided with the moving member for closing the other opening has a conduit portion selectively connected to one of the openings, One end communicates with the outside of the sealed container, and the other end is selectively connected to one of the openings by turning to one of the openings. Characterized by having a pipe portion provided with a rotating member for closing the opening of Than it is.

[0010]

According to the present invention, there is provided a closed container having a plurality of conduit terminals opened, one end of which communicates with the outside of the closed container, and the other end of which is selectively connected to one of the openings. It has a pipe section provided with a member for closing the opening. By switching the pipeline by moving or rotating, the selected pipeline terminal can be connected to the pipeline communicated outside the closed container via the pipeline.

With such a structure, when it is necessary to switch the pipeline system, the connection can be easily switched, and in this case, only the bending in the designed range is applied. At this time, no dust or moisture enters. Therefore, it is possible to always keep the inside of the pipe clean.

[0012]

FIG. 1 is a schematic diagram showing an embodiment of a pipeline switch according to the present invention. In the figure, 1 is a closed container, 2 is a flexible conduit portion, 2a is a flexible conduit, 2b is an opening, 2c is an airtight plate,
Reference numerals 3, 4, 5, and 6 are pipes. The pipe 3 is connected to one end of a flexible pipe 2 provided in the closed container 1.
The flexible conduit 2 a is configured so that the bending direction can be changed from outside the closed container 1. Therefore, by changing the bending direction in the direction of the arrow, the opening 2b at the other end of the flexible conduit 2a can be connected to one of the conduits 4, 5, and 6. This figure shows a state in which it is connected to the pipeline 4.

The airtight plate 2c moves together with the flexible conduit 2a to prevent compressed air leaking from the vicinity of the opening 2b of the flexible conduit from escaping to the conduits 5, 6. It is. It can be formed by an elastic plate or the like.
When the compressed gas leaks into the closed vessel 1 from the connection between the b and the pipe 4, the airtight plate 2 c is pressed against the openings of the pipes 5 and 6 by increasing the pressure in the closed vessel. The opening is closed to increase the airtightness.

The specific structure of the closed container described with reference to FIG. 1 will be described. FIG. 2 is a cross-sectional view of the closed container, and FIG. 3 is a perspective view of a flexible conduit portion. In the figure, 1 is a closed container, 2 is a flexible conduit, 2a is a flexible conduit, 2b is an opening thereof, 2c is an airtight plate, 2d is an arm, 2e is a rotary shaft, 2f is a rotary seal, 2g is a handle, 2h is a lower support, 3 and 4 are pipelines, and 7 is a pipeline connection fitting.

The flexible conduit 2a is held by an arm 2d. The arm 2d is rotatably supported in the closed container 1 by the rotation shaft 2e and the lower support 2h.
By operating the handle 2g fixed to e, the handle can be rotated in the arrow direction described with reference to FIG. When the opening 2b faces the pipeline 4, the airtight plate 2c closes the other pipeline. The rotary shaft 2e is provided with a rotary seal portion 2f to maintain an airtight structure.

In this embodiment, a tube made of polyethylene having an outer diameter of 8 mm and an inner diameter of 6 mm is used as the pipe and the flexible pipe. Connected, airtight. After the flexible conduit 2a is loosely housed in the arm 2d, it is fixed to the arm 2d at the distal end, and is connected to one of the conduits 4, 5, and 6 (FIG. 1) through the airtight plate 2c.

Which pipe line is to be connected is determined by the arm 2d
Can be set by rotating the handle 2g to change the direction of the flexible conduit 2a. If the pipe and the flexible pipe are not properly connected, a step may be formed in the opening, and the wire fed by air pressure may stop. In order to prevent this, it is preferable to provide a stopper (not shown) corresponding to each pipe position so that the handle can be fixed when the handle is placed at an appropriate position.

An experimental result using the pipeline switch of the embodiment will be described. 2 and 3 are connected to each other to extend the pipeline connecting the 20 locations, and to a pipeline having a total pipeline length of 500 m, a cable having an outer diameter of 2 mm described in the above-mentioned document is connected.
As a result of using compressed air with a pressure of 7 kg / cm ² ,
The time required for the transfer was 14 minutes. This is equivalent to the case where the air was transmitted through a 500 m pipe that did not include the pipeline switch, and no change in the transmission characteristics due to the addition of the pipeline switch was observed.

Further, no change in the transmission characteristics was observed when the connection of the pipeline was changed. Even when the connection was changed, no change in this characteristic was observed. At this time, the change of the pipe direction was very easy.

FIG. 4 shows a specific example of an embodiment in which the pipeline switching device of the present invention is used in a piping system. (A) is a diagram in which a temperature sensor and the like are shared by three different pipelines 4a, 4b, and 4c. Two pipeline switchers 1a and 1b capable of selectively connecting three pipelines were used, and provided at two locations, an entrance and an exit. By switching the pipeline switcher between 1a and 1b, the cable can always be transmitted from the same entrance and exit to the selected pipeline.

FIG. 3B shows three pipes 4a, 4b, 4c.
Is connected to any three other pipelines 5a, 5b, 5c, and pipeline switches 1a, 1b, 1c, 1d, 1
By providing e and 1f at the terminal of each pipeline and switching the pipeline switch, flexible pipeline connection is possible.

FIG. 6 is a schematic structural view of another embodiment of the pipeline switcher of the present invention. FIG. 6 (A) is a partially cutaway perspective view and FIG. 6 (B) is a longitudinal sectional view. . In the figure, 11 is a closed container, 12, 13a, 13b, 13c are pipelines, 15 is a holding plate, and 16 is an elastic plate. The closed container 11 has a cylindrical shape and is divided into two parts, 11a and 11b. The parts 11a and 11b are configured to be rotatable, and both parts are airtightly connected. The airtight connection is
For example, it has a structure in which two parts can be rotated in a sealed state, such as a relationship between a main body and a lid of a tea caddy. Of course, an appropriate structure can be adopted for the seal portion. Conduits 13a, 13b,
13c is fixed to the upper surface plate of the portion 11b corresponding to the main body in a state where the openings are in close contact with each other. The conduit 12 is attached to a holding plate 15 that constitutes a lower plate of a portion 11a corresponding to a lid. It is mounted eccentrically so that it can be selectively connected oppositely. It is connected to one end of a flexible pipe section 2 provided in the closed container 1. As shown in FIG. 7, the lower plate of the portion 11a is composed of a circular holding plate 15 made of metal or the like, and an airtight plate 16 made of an elastic plate attached thereunder. The airtight plate 16 seals the opening of the unconnected pipe. The function of the airtight plate 16 is the same as that of the airtight plate 2c of the above-described embodiment. A notch 17 is formed in a part of the holding plate 15 and a part of the airtight plate 16, and a portion 11b is formed.
The rotation range can be limited by engaging with a projection (not shown) provided on the upper plate. As in this example,
When three pipelines are selected, the rotation angle is 24
Since 0 degree is sufficient, the notch 17 is designed to have an angle that limits its rotation range.

In this embodiment, in addition to the fact that the pipeline can be switched in the same manner as in the above-described embodiment, the pipeline switch itself can be made small and elongated, so that the pipeline can be stored. It can be suitable for use in a junction box or the like corresponding to a switchboard in a built building. In addition, since the relative rotation angle at the time of switching the pipeline is one rotation or less, the relative rotation in the pipeline switch can be performed without using a special flexible pipeline. It is possible.

[0024]

As is apparent from the above description, according to the present invention, the conduit can be easily changed and unnecessary foreign substances can be prevented from entering the conduit. It is useful when used when laying while changing the laying position. Similarly, the present invention is also useful in the case where the wiring system is frequently changed or added, such as in-building wiring, and the form of the laying route is uncertain.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a pipeline switch of the present invention.

FIG. 2 is a cross-sectional view of a specific structure of the pipeline switch of FIG.

FIG. 3 is a perspective view of a flexible conduit section.

FIG. 4 is an explanatory view of a specific example of an embodiment in which the pipeline switching device of the present invention is used in a piping system.

FIG. 5 is an explanatory diagram of a conventional example in which a pipe connection is changed.

FIG. 6 is a schematic configuration diagram of another embodiment of the pipeline switching device of the present invention.

FIG. 7 is a perspective view of a main part of another embodiment of the pipeline switcher of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Flexible pipe part 2a Flexible pipe 2c Airtight plate 3,4,5,6 Pipe

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 6/46 H02G 1/08

Claims (2)

(57) [Claims] 1. A pipeline switcher for use in a method of laying a wire for pressure-feeding a wire for communication to a pipe previously laid with compressed air, wherein at least a closed vessel having a plurality of pipe terminals opened therein is provided. A part is formed of a flexible member, one end communicates with the outside of the closed container, and the other end is selectively connected to one of the openings, and a moving member for closing the other opening is provided. A pipeline switch having a pipeline section. 2. A pipeline switcher for use in a method of laying a wire for pressure-feeding a wire for communication to a pipe previously laid with compressed air, wherein a plurality of pipe terminals are opened on the same circumference. A conduit in which one end communicates with the outside of the closed container, and the other end is provided with a rotating member which is selectively connected to one of the openings by being rotated and which closes the other opening; A pipe line switch having a portion.