JP4153406B2 - Electric wire undergrounding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cable undergrounding device and a underground conduit for embedding and installing a communication cable or the like in the ground, and in particular, a wire undergrounding device and a ground that are laid in a buried groove while putting a cable in a conduit. Concerning conduits.

  In recent years, social capital development for embedding overhead cables in the city has been emphasized. These underground works are currently laying cables using common grooves.

  FIG. 8 shows a conventional construction of a communication cable using a common groove. In FIG. 8, in the cable work, for example, when a communication cable is laid between the manhole 105a and the manhole 105d, the cable driving wheel 100 is arranged at the position of the manhole 105a on the feeding side, and the position of the manhole 105d on the towing side. A shaft drive winch 108 is disposed on the shaft.

Then, it is connected to the shaft drive winch 108 through the pulling rope 103 from the manhole 105 toward the manhole 105 d through the conduit 106, and the tip of the cable 104 drawn from the cable drum 101 through the corrugated flexible tube 102 is connected to the back of the pulling rope 103. The cable 104 is laid on the pipe 106.

  However, since such conventional cable undergrounding work is a large-scale investment such as the installation of a common ditch, it is not always possible to smoothly promote the underground development project. This is the cause of the delay.

  In particular, in communication cables, the voltage applied to the cables is lower than that of power cables, and it is strongly desired that the cables can be easily submerged in addition to using a common groove.

The present invention relates to an electric wire undergrounding device and an underground device that lays and embeds a cable directly in an excavated laying groove using an underground conduit and embeds the wire easily, quickly, and at low cost. The purpose is to provide a conduit.

  In order to achieve this object, the present invention is configured as follows.

An electric wire undergrounding apparatus according to the present invention includes a cable drum having a cable attached thereto, a conduit drum having a flexible underground conduit having a roll cross-sectional shape freely open in the circumferential direction, and an electric wire drum. The cable conduit that inserts the cable fed from the cable drum with the tube outer periphery opened to the inside by pushing and spreading the underground conduit fed from the inside, and the underground conduit that has passed through the cable insert exited The constricted cylindrical constricted tube that has been squeezed toward the constricted tube, the constricted portion that narrows down the constricted roller that presses the constricted conduit tube that exits the constricted tube from both sides, and the underground conduit that has passed through the constricted portion. A cable laying portion laid in the excavated buried groove, a self-propelled traveling body equipped with a cable drum, a conduit drum, a cable insertion portion, a throttle portion and a cable laying portion;
It is provided with.

Moreover, in the electric wire undergrounding apparatus of the present invention, the first imaging unit that images the installation start position with respect to the embedded groove by the cable laying unit and the second imaging unit that images the installation completion position with respect to the embedded groove on the traveling body. And is equipped with.

The cable insertion portion includes a diameter expanding member integrally provided with a conical portion at a front end and a rear end of the main body portion, and a cable insertion groove formed to open upward from the main body portion of the diameter expanding member toward the rear conical portion. And a guide portion that supports the diameter-expanding member in a suspended state inside and opens upward to the outside and guides the cable from the outside with respect to the cable groove.

According to the electric wire undergrounding apparatus of the present invention, for example, an installation groove having a depth of about several tens of centimeters is excavated, and hand holes (concrete iron with a lid) are installed at intervals of several hundred meters. The traveling body of the electric wire undergrounding device of the present invention is moved along the laying groove between, and the pipe is opened while feeding the underground conduit from the conduit drum mounted on the traveling body. After the inserted cable is inserted, the tube is closed and narrowed down after insertion, and then laid down by running down into the buried groove, and after installation, it can be backfilled and buried underground.

  For this reason, underground construction requires simple work steps such as excavation of buried trenches, cable laying by the electric wire undergrounding apparatus of the present invention, and backfilling of buried trenches, and the construction period is short and the cost can be greatly reduced.

  It can also be realized as a device that automates a series of processes such as excavation, laying, embedding, and simple paving, including the electric wire undergrounding device of the present invention. Therefore, it is possible to easily and efficiently realize the undergrounding of the electric wire in a place where the wire is required.

Furthermore, by automatically recording and recording the video of the cable laying work accompanying the movement of the traveling body, it is possible to easily obtain necessary images such as work status photographs that need to be submitted along with the construction work.

  FIG. 1 is an explanatory diagram of cable laying work using the electric wire undergrounding apparatus according to the present invention. In FIG. 1, a wire undergrounding device 1 according to the present invention uses a traveling body 2 such as an automobile, and the traveling body 2 is equipped with a conduit drum 3 and a cable drum 4. The conduit drum 3 is rotationally driven by the tube feed roller 25 and the drum drive motor 13 so that the underground conduit 5 mounted on the conduit drum 3 is sent out to the cable insertion unit 7 side.

  The cable drum 4 is arranged coaxially with the conduit drum 3, but can rotate freely with respect to the conduit drum 3, and rotates as the cable 6 is pulled out.

  Here, the underground conduit 5 attached to the conduit drum 3 is flexible and has a roll cross-sectional shape that is flexible and can be freely opened in the circumferential direction. The cable insertion unit 7 opens the outer periphery of the pipe by expanding the underground conduit 5 fed from the inner side by the rotational drive of the conduit drum 3 by the feed roller 25 and the drum drive motor 13 to open the outer periphery of the pipe. On the other hand, the cable 6 pulled out from the cable drum 4 is inserted inside.

In this way, after the cable 6 is inserted into the open underground conduit 5, the underground conduit 5 is squeezed and sent out by the throttle portion that will be clarified later. The underground conduit 5 in which the cable 6 is inserted from the cable insertion unit 27 is gently curved from the front portion of the traveling body 2 provided at the front portion of the traveling body 2 to the lower rear and is embedded in the buried groove 10. It passes through a cylindrical cable laying portion 9 reaching the bottom of the slab and is guided and lowered into a buried groove 10 that has been excavated in advance.

  The buried groove 10 for laying the underground conduit 5 is excavated in advance as a groove having a depth of, for example, about several tens of centimeters and a width of about several tens of centimeters. A concrete fence with a lid known as a handhole 11 is installed at regular intervals, for example, every several hundred meters.

  Therefore, the cable laying by the electric wire undergrounding device 1 of the present invention is sequentially performed between the hand holes 11 installed every several hundred meters, for example.

Further, a front ITV 14 is installed as a first imaging unit below the front part of the traveling body 2, and a rear ITV 15 is installed as a second imaging unit below the rear part of the traveling body 2. The front ITV 14 images the installation start portion where the conduit 5 is lowered in the embedded groove 10 provided in front of the traveling body 2 of the electric wire undergrounding device 1.

On the other hand, the rear ITV 15 performs imaging of a laying completion portion through which the rear end portion of the traveling body 2 of the conduit 5 lowered in the buried groove 10 that is behind the traveling body 2 passes . Further, the traveling unit 2 is provided with a control unit 12 for controlling the feed roller 25 and the drum drive motor 13, photographing by the operations of the front ITV 14 and the rear ITV 15, and recording the image.

  FIG. 2 is an explanatory diagram of the cable insertion unit 7 mounted on the electric wire undergrounding device 1 of FIG. In FIG. 2, the cable insertion unit 7 supports the diameter-expanding member 16 inside the unit housing 7a in a suspended state by mounting the cable guide portion 18 on the upper portion of the housing 7a. The diameter-expanding member 16 has a front part of the main body part 16b as a conical part 16a and a rear part as a conical part 16c.

  As is apparent from the side view of the cable insertion unit 7 in FIG. 3 as viewed from the left side, the cable guide portion 18 provided as a support portion on the upper portion of the diameter expanding member 16 opens to the upper portion. A cable insertion groove 17 that is also open at the top is formed from the main body portion 16b of the diameter-expanding member 16 on the lower side of the portion to the rear conical portion 16c. The cable 6 drawn from the cable drum 4 of FIG. 1 is inserted by the feed roller 25 into the cable insertion groove 17 of the diameter-expanding member 16 from above the cable guide portion 18.

  The underground conduit 5 is fed from the conduit drum 3 of FIG. 1 by the feed roller 25 to the conical portion 16 a at the tip of the diameter expanding member 16. The underground conduit 5 used in the present invention has a roll cross-sectional shape that can be freely opened in the circumferential direction. It is fed along the diameter-expanding member 16 with the upper side of the conduit 5 opened upward.

  The portion opened to the upper side of the underground conduit 5 passes through the outside of the cable guide portion 18 that supports the diameter-expanding member 16, and again passes through the conical portion 16 c behind the diameter-expanding member 16. Although it returns to the shape, after the cable 6 is inserted into the inside through the cable insertion groove 17 before that, the underground conduit 5 that has been spread by passing through the rear conical portion 16c is closed, The cable 6 is in the conduit.

  The underground conduit 5 that has passed through the diameter-expanding member 16 after receiving the insertion of the cable 6 is subsequently narrowed in diameter by passing through a conical throttle tube 19 that has been narrowed toward the outlet. After being pressed from the outside by the pair of squeezing rollers 20 and squeezed, it is lowered to the buried groove 10 below through the cable laying portion 9 of FIG.

  4 is a plan view of the inside of the cable insertion unit 7 shown in FIG. As apparent from the plan view of FIG. 4, the diameter-expanding member 16 installed in a suspended state on the cable insertion unit 7 is inserted into the cable by the cable guide 18 to reach the rear cone 16 c below the opening. A groove 17 is formed, and the cable 6 passes through the cable guide portion 18 and the cable insertion groove 17 into the underground conduit 5 opened upward by the diameter-expanding member 16.

  FIG. 5 is an explanatory view of an embodiment of the underground conduit 5 used in the electric wire undergrounding apparatus 1 of the present invention shown in FIG. As is apparent from the side view of FIG. 5 (A), the underground conduit 5 has a roll cross-sectional shape in which the tube wall can be freely opened in the circumferential direction, and the outer peripheral end 5a and the inner peripheral end 5b are mutually connected. Although it is formed so as to overlap with each other, by being fed into the conical portion 16a at the tip of the diameter expanding member 16 of the cable insertion unit 7 shown in FIGS. 5a and the inner peripheral side end 5b are divided into left and right parts so that the upper part opens.

  FIG. 5 shows the underground conduit 5 in a state where the cable 6 is inserted through the cable insertion unit 7 of FIGS. Furthermore, the underground conduit 5 is also flexible in the longitudinal direction, so that it can be wound around the cable drum 4 of FIG. 1, and after being unwound, it passes through the cable laying portion 9 into the buried groove 10. Can be lowered.

  FIG. 6 is an explanatory view showing another embodiment of the underground conduit according to the present invention. The underground conduit 25 in FIG. 6 is characterized by the use of a corrugated hard synthetic resin tube. By using this corrugated hard synthetic resin tube, the flexibility in the longitudinal direction is increased. I have to.

  Further, as is apparent from the end view of FIG. 6A, the underground pipe 25 has a roll end face shape that can be opened in the circumferential direction so that the outer end 25a and the inner end 25b overlap each other. As in the case of the underground conduit 5 in FIG. 5, the outer end of the cable insertion unit 7 shown in FIGS. The part 25a and the inner peripheral side end part 25b are divided into left and right parts so that the upper part is opened, and the cable 6 is inserted with the upper part opened.

  FIG. 7 is a block diagram showing an embodiment of the control unit 12 mounted on the electric wire undergrounding apparatus 1 of FIG. The control unit 12 includes an operation unit 21, a controller 22 using an MPU, a recording control unit 23, and a drum drive unit 24.

  The operation unit 21 performs start and stop operations of the electric wire undergrounding apparatus 1 according to the present invention. When the starting operation is performed by the operation unit 21, the controller 22 controls the feed roller / drum drive unit 24 and drives the conduit drum 3 by the drum drive motor 13, the feed roller drive motor 25a, and the squeeze roller drive motor 20a. The underground conduit 5 is fed into the cable insertion unit 7.

  Further, the controller 22 operates the recording control unit 23 to start recording and recording by the front ITV 14 and the rear ITV 15. Images taken by the front ITV 14 and the rear ITV 15 are continuously recorded, for example, on a hard disk or the like provided in the recording control unit 23, and an appropriate interface cable is used as image information indicating the work result after the work is finished. It can be stored in a connected personal computer or the like.

  As the controller 22, the movement stop of the traveling body 2 may be controlled. That is, the controller 22 drives the conduit drum 3 in synchronization with this while moving the traveling body 2 at a constant speed, and feeds the underground conduit 5. Of course, when a vehicle or the like is used as the traveling body 2, the driver operates while looking at the condition of feeding the underground conduit 5 into which the cable 6 has been inserted from the cable laying portion 9 ahead. Of course, you can do it.

  Here, in the above embodiment, as shown in FIG. 2, after the cable 6 is put in the cable insertion unit 7 by the expansion of the underground conduit 5 by the diameter-expanding member 16, the throttle tube 19 and the throttle are inserted. The underground conduit 5 is squeezed by the roller 20 to ensure the airtightness after the cable 6 is inserted. However, after the cable 6 is inserted, the underground conduit 5 is desired to be further sealed. In FIG. 5A, the overlapping portion of the outer peripheral end 5a and the inner peripheral end 5b of the underground conduit 5 may be bonded and fixed with an adhesive.

  Regarding the bonding and fixing of the mating portion of the underground conduit 5, the alignment on the inner peripheral side end 5 b side in FIG. 5 is performed with the underground conduit 5 passing through the diameter expanding member 16 in FIG. 2 opened upward. An adhesive may be applied to the outer part to be a part, and may be bonded and fixed when narrowing down through the throttle tube 19 with the adhesive applied.

  Application of the adhesive to the underground conduit 5 in the open state may be performed on the open portion of the underground conduit passing through the adhesive application by an appropriate method such as an adhesive application roller or an adhesive spray nozzle. .

  In the embodiment of FIG. 1, the electric wire undergrounding device 1 exemplifies a case where the underground conduit 5 in which the cable 6 is inserted is laid in the buried trench 10 that has been excavated alone. If a excavating unit for excavating the buried groove 10 is attached to the front of the traveling body 2 and a backfill unit for returning the surrounding soil excavated to the rear of the traveling body 2 to the buried groove 10 is integrally attached, The excavation of the buried groove 10, the installation of the underground conduit 5 into which the cable has been inserted into the excavation groove 10, and the backfill of the already installed underground conduit 5 can be performed as a series of automatic operations.

  Further, when cable laying work is performed in an urban area by the electric wire undergrounding apparatus 1 of the present invention, for example, after excavating the buried groove 10 along the sidewalk, the underground conduit 5 in which the cable 6 is inserted is buried. After embedding, temporary paving is performed. On the other hand, in areas that do not require paving, such as in factory premises or in the wilderness, more efficient cable laying work can be simplified because simple paving after backfilling is not necessary.

  Furthermore, the laying section by the electric wire undergrounding device 1 of the present invention is determined by the length of the underground conduit 5 of the conduit drum 3 mounted on the traveling body 2, and accordingly, per one conduit drum 3. If the length of the underground conduit 5 that can be wound is determined, an appropriate installation distance can be ensured.

  Moreover, as a cable embed | buried by the underground conduit 5 by this invention, appropriate electric wire cables, such as a communication cable and an electric power cable, are object.

  Further, the cable laying by the electric wire undergrounding apparatus 1 according to the present invention is not necessarily limited to the case where the burying groove 10 is excavated and laid, but in the case of temporary cable laying such as half a year or one year, It is also possible to lay the underground conduit 5 into which the cable 6 is inserted without digging the groove 10 while being exposed on the ground surface.

Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the ruler examples.

Explanatory drawing of cable laying construction using electric wire undergrounding device of the present invention Explanatory drawing of the cable insertion unit provided in the electric wire undergrounding apparatus of FIG. Side view of the conduit insertion side in FIG. Plan view of the cable insertion unit of FIG. Explanatory drawing of embodiment of underground conduit tube by this invention Explanatory drawing of other embodiment of underground conduit according to the present invention The block diagram of the control part of the electric wire undergrounding apparatus of FIG. Illustration of conventional cable laying construction using joint grooves

Explanation of symbols

1: Wire underground device 2: Traveling body 3: Conduit drum 4: Cable drum 5, 25: Underground conduit 5a, 25a: Outer end 5b, 25b: Inner end 6: Cable 7: Cable insertion unit 9: Cable laying part 10: Buried groove 11: Hand home 12: Control part 13: Drum drive motor 14: Front ITV
15: Back ITV
16: Diameter-expanding members 16a, 16c: Conical portion 16b: Body portion 17: Cable insertion groove 18: Cable guide portion 19: Diaphragm tube 20: Diaphragm roller 20a: Diaphragm roller drive motor 21: Operation unit 22: Controller 23: Recording control Section 24: Drum drive section 25: Feed roller 25a: Feed roller drive motor

Claims (3)

A cable drum fitted with a cable;
A conduit drum equipped with a flexible underground conduit having a roll cross-sectional shape that is freely open in the circumferential direction;
A cable insertion part for inserting the cable fed from the cable drum into the inside as the pipe outer periphery is opened by pushing and expanding the underground conduit pipe fed from the conduit drum;
A constriction tube-shaped constriction tube in which the underground conduit pipe that has passed through the cable insertion portion is squeezed toward the outlet, and a constriction roller that constricts the underground conduit tube that exits the constriction tube by pressing it from both sides. And
A cable laying section for laying a underground conduit that has passed through the throttle section in a buried trench excavated in advance;
A self-propelled traveling body equipped with the cable drum, conduit drum, cable insertion part, throttle part and cable laying part;
An electric wire undergrounding device characterized by comprising:
In wire underground apparatus according to claim 1, the traveling member, a first imaging unit that captures an image of a laying starting position for embedding groove by the cabling unit, the images the laying completion position to said embedded grooves 2. An electric cable undergrounding device characterized by mounting two image pickup units.
The electric wire undergrounding device according to claim 1, wherein the cable insertion portion includes a diameter expanding member integrally provided with a conical portion at a front end and a rear end of the main body portion, and a rear portion from the main body portion of the diameter expanding member. A cable insertion groove formed so as to open upward toward the conical portion; a guide portion that supports the diameter-expanding member in a suspended state in the interior and opens upward to the outside and guides the cable from the outside to the cable insertion groove; An electric wire undergrounding device characterized by comprising:

Images