JPH0138122Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention automatically inserts a coil wire gradually into a gas supply pipe or other pipe that has a complicated route such as bends or steps. The present invention relates to a conduit insertion device that performs various operations such as measuring the length of a conduit, detecting specific points such as bent portions, inspecting the inside of the conduit, and removing obstacles.

(Prior art and its problems) An example of a conventional pipe insertion device that performs work by inserting a coil wire into a pipe having a complicated route such as a curved portion is a drainage pipe cleaning device. A storage container containing a wire is rotatably supported, and a coil wire inserted into a conduit is rotated by the rotation of the storage container, and work is performed by a member provided at the tip of the coil wire. However, this device does not automatically insert the coil wire. For example, without rotating the storage container or the coil wire, a person directly holds the coil wire in their hands and pulls it out of the storage container. After the coil wire is temporarily fixed to the storage container so that it cannot move forward or backward, the coil wire is moved while rotating and pushed into the conduit, and then the temporary fixation is released and only the storage container is removed. It is inserted by repeatedly retracting it. In this way, conventional devices cannot perform the insertion work automatically, making the work complicated. For example, when measuring the length of a pipe, it is necessary to attach scales to the coil wire itself. It is actually very difficult to detect specific points such as bends in pipes. Attempts have been made to automatically propel such coil wires, but the current situation is that none of them are satisfactory.

(Purpose of the invention) In order to eliminate the above-mentioned drawbacks of the conventional device, the inventors of the present invention first proposed, for example, U.S. Pat.
(Refer to Publication No. 165153), Utility Application No. 59-53735 (Refer to Publication No. 165153)
As disclosed in the specifications and drawings of Japanese Utility Model Application No. 60-165164) and Utility Application No. 59-53736 (see Japanese Utility Model Application No. 60-165165), the coil wire is equivalently regarded as a screw shaft. We devised a conduit insertion device in which a long coil wire provided with a tip member is rotated and propelled from the main body to insert the conduit through the conduit by configuring a screw-like propulsion mechanism. In the present invention, in such a conduit insertion device, a sensor for detecting the state of the conduit and the insertion state is configured in the tip member or at an appropriate place leading to the tip member, and information from this sensor is configured. The object of the present invention is to pass an electric wire through the coil wire so that it can be detected on the main body side.

(Means for Solving the Problems) The present invention will be described in detail below based on drawings showing embodiments.

Reference numeral 1 indicates the conduit insertion device as a whole;
This conduit insertion device 1 is configured to insert a conduit 5 by rotatably propelling a long, tightly wound coil wire 3 provided with a tip member 2 from a main body 4 using a screw-like propulsion mechanism. The conduit insertion device 1 may have any suitable configuration as long as it has such a function.
To explain the configuration of the embodiment shown in the figure, the main body 4 of this embodiment can freely store the coil wire 3 in the storage space 8 formed between the outer shell 6 and the inner shell 7, and has a coil wire 3 on one side. A storage container 10 that constitutes an inlet/outlet portion 9 for the coil wire 3 is rotatably mounted on a base 11, and a container 10 is provided between the wires at a plurality of locations around the coil wire 3 in correspondence with the inlet/outlet portion 9 on the base 11. The coil wire 3 is rotationally propelled from the main body 4 by engaging the protrusions to form a screw-like propulsion mechanism section 12 and rotating the storage container 10. Therefore, the present invention configures a sensor S at the tip member 2 or a suitable place leading to the tip member 2, and connects the sensor S and the detection device 13 on the main body 4 side by passing an elastic wire 14 inside the coil wire 3. Wire and connect. To explain an embodiment of the sensor S, S ₁ is a microphone, and this is a microphone that uses the sliding sound, impact sound, resonance sound, etc. generated between the tip member 2 and the pipe 5 due to the rotational propulsion of the tip member 2. It detects the state and insertion state. Further, S ₂ and S ₃ are sensors for detecting water using differential water or the like, and sensors that detect the bent portion 15 of the conduit 5 by moving away from the conduit 5 at the bent portion 15 . Further, S ₄ consists of a pair of detection members 17 and 17' fixed one after the other in the longitudinal direction within a non-tightly wound coil spring 16 provided between the tip member 2 and the coil wire 3. This is a sensor that detects insertion failure of the tip member 2 due to proximity. As shown in these, the sensor S,
The configuration and installation positions of S ₁ , S ₂ , S ₃ , S ₄ , etc. are appropriate. These sensors S and the detection device 13 on the main body 4 side
As mentioned above, the electric wire connecting the
Set it to 4. Such a stretchable electric wire 14 is, for example, a conductor wire 19 wound around a stretchable center line 18 of silicone copolymer, polyester copolymer, or the like.
The basic structure is that the wire is covered with an insulator 20, and if necessary, a brake string 21 can be wound around it to prevent it from elongating beyond a certain level, or a shield can be applied. The composing electric wires can be applied. As will be described later, the stretchable electric wire 14 is preferably supported by appropriate support members 22 at appropriate intervals of the coil wire 3. A method of supporting the elastic electric wires 14 by the support member 22 is to form the elastic electric wires 14 into a disk shape or the like as shown in FIG. In addition to inserting these into the coil wire 3 by press-fitting or screwing, the coil wire 3 is divided into a plurality of parts in the length direction, and a support member 22 is attached each time these coil wires 3 are connected. Alternatively, the elastic wire 14 as well as the coil wire 3 may be divided into a plurality of parts in the length direction, each of which is supported by the support member 22, and these parts are connected by an appropriate connector. The supporting method may be any suitable method.

(Function) In the above configuration, when the storage container 10 is rotated by the motor 23, the coil wire 3 is moved to the main body 4.
In this way, the tip member 2 moves forward in the conduit 5 together with the coil wire 3 to reach the bend 15.
It can be automatically and gradually inserted into the conduit 5 having a step 24 or the like. Then, when the storage container 10 is rotated in the reverse direction, the coil wire 3 returns to the main body 4, and the tip member 2 can be retreated and returned from the conduit 5.
For example, if a coil wire 3 with an outer diameter of φ1.06 and a wire diameter of d2.3 is used, and the rotation speed is 500 rpm, the coil wire 3 will be approximately 19
It can be inserted at a movement speed of mm/sec.

Thus, in the above insertion work, various detection signals from the sensors S, S ₁ , S ₂ , S ₃ , S ₄ , etc. configured on the tip member 2 etc. are sent to the main body 4 via the elastic wire 14. It can be obtained in the detection device 13 on the side. Incidentally, the detection device 13 and the stretchable electric wire 14 can be electrically connected by a known mechanism such as a slip ring.

By the way, as mentioned above, the present invention is based on coil wire 3.
The coil wire 3 is propelled by rotating continuously in one direction, but since the speed at which the rotational force is transmitted through the coil wire 3 is finite, there is a relative distance between two points on the coil wire 3. Twisting and stretching occur.
For example, when the coil wire 3 is continuously rotated in a certain direction and then stopped once and then reversed, it takes a considerable amount of time for the tip member 2 to start rotating in reverse. It can be seen that the amount is . When an electric wire made of a normal stranded wire or the like is passed through the coil wire 3 that causes such twisting, the electric wire is
Due to repeated back and forth movements, etc., the ends may break or the middle may become twisted, making it impossible to put it to practical use.

However, in the present invention, since the electric wire for electrically transmitting various information from the sensor S to the detection device 13 on the main body 4 side through the inside of the coil wire 3 is a stretchable electric wire 14, it is suitable for the above-mentioned twisting of the coil wire 3. Therefore, it is possible to effectively prevent the ends from breaking or being twisted in the middle.

In addition, when the coil wire 1 is inserted over a long distance, the torque transmission becomes uneven and becomes intermittent and pulsating due to local resistance at the bend 15 and other parts, and an increase in its own weight. , moreover, the phase varies in the length direction, often resulting in local twisting, curving, etc. In response to such a phenomenon, the support member 22 supports the coil wire 3 in each section of the stretchable electric wire 14, so that for each section of the stretchable electric wire 14, the coil wire 3 corresponding to the stretchable wire 14 is supported between the support members 22 on both sides. In addition to being only twisted in accordance with the relative twist angle of the section, this twist is again forced back by the support member 22 when the section of the coil wire 3 is untwisted. Therefore, the stretchable electric wire 14 does not accumulate twisting or tension locally, and, together with its elasticity, it is difficult to exceed the permissible limit of twisting or stretching, effectively preventing wire breakage. can do.

(Effects of the invention) As described above, the present invention provides a conduit insertion device configured to insert a conduit by rotating a long coil wire provided with a tip member from the main body by a screw-like propulsion mechanism. A sensor is configured at the tip member or at a suitable location leading to the tip member, and the information from the sensor is configured to be detected by the detection device on the main body side via the electric wire passed through the coil wire. It is possible to detect the condition of the pipe and the state of insertion during pipe insertion work, making the work safer and easier.
This has the effect of being reliable and efficient. In particular, in the present invention, since the electric wire is a stretchable electric wire, it is possible to effectively prevent the occurrence of wire breakage or local twisting due to twisting of the coil wire during insertion, and the provision of a support member has such a prevention effect. This has the effect of making it more reliable.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention. FIG. 1 is a schematic explanatory diagram of the overall configuration, FIG. 2 is an enlarged sectional explanatory diagram of the portion shown in FIG. 1, and FIG. An enlarged explanatory view of other parts of the figure, FIG. 4 is a perspective view of an example of a stretchable electric wire, and FIG. 5 is a diagram of an example of a method of supporting the stretchable electric wire by a support member. Code 1... Pipe insertion device, 2... Tip member, 3
... Coil wire, 4 ... Main body, 5 ... Conduit, 6
...outer shell, 7...inner shell, 8...storage space, 9...access/exit section, 10...storage container, 11...
Base body, 12... Screw-shaped propulsion mechanism, 13... Detection device, 14... Stretchable electric wire, 15... Bent part, 16
... Coil spring, 17, 17' ... Detection member, 18 ... Center line, 19 ... Conductor wire, 20 ...
Insulator, 21... Brake string, 22... Support member, 23... Motor, 24... Step, S, S ₁ ,
S ₂ , S ₃ , S ₄ , ...sensor.

Claims (1)

[Claims for Utility Model Registration] (1) In a conduit insertion device configured to insert a conduit by rotating a long coil wire provided with a tip member from a main body by a screw-like propulsion mechanism, A conduit insertion device, characterized in that a sensor is configured at a tip member or at an appropriate location leading to the tip member, and the sensor and a main body side detection device are connected by passing an elastic electric wire through the coil wire. . (2) The conduit insertion device according to claim 1, wherein the elastic wires are supported by supporting members at appropriate intervals of the coil wires. (3) Stretchable electric wires are basically constructed by covering a conductor wire wound around a stretchable center line made of silicone copolymer or polyester copolymer, etc., with an insulator, and if necessary, prevent it from stretching beyond a specified level. The conduit insertion device according to claim 1, which is a utility model registered, and has a structure in which a brake string is wound around the pipe for protection or a shield is applied.