JPH0355649Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a trench excavator for burying optical fibers and various cables.

[Prior Art] Conventionally, trenches in which optical fibers and various cables are buried are excavated using trench excavators.

Generally speaking, two types of trench excavators are known: one type that excavates using a bucket, and the other type that uses an endless chain with a digging blade for continuous excavation.

[Problems to be solved by the invention] This type of excavator is suitable for excavating roadside portions of general roads, as it is required to be able to travel through the excavated area.

By the way, with the development of expressways, the median strip that separates the inbound and outbound lanes of expressways has become an ideal place to bury optical fibers and cables, since they connect far-flung cities in the shortest distance. , it is usually impossible to drive a trench excavator into the median strip. Additionally, there were fences or guide rails in the median strip, which posed a difficult problem in terms of excavation work.

Therefore, the purpose of this invention is to provide a trench digging machine that is optimal for digging trenches in the median strip of expressways.

[Means for Solving the Problems] In order to achieve the above object, in this invention, a support arm is provided on a self-propelled main body, and a first control device and a second control device are attached to the arm. mounts and supports a vertically movable and movable excavation device, and the support arm is extendable and retractable by a third control device between a working position in which the excavation feeding device protrudes to the side of the main body and a storage position in which the excavation feed device is housed within the main body. It is as follows.

[Function] When proceeding with excavation work in such a trench excavator, the third control device causes the excavation feeder, which is in an almost horizontal storage position, to be extended laterally to the excavation position in the median strip. Take a working posture. Next, the excavation portion side of the excavation feeding device is rotated toward the excavation surface side of the median strip by the second control device, and then lowered by the first control device to set the excavation depth. Next, the excavation feed device is operated to excavate while driving the main body along the side strip of the road.

[Embodiment] Hereinafter, an embodiment of this invention will be described in detail with reference to the drawings of FIGS. 1 to 3.

In the figure, reference numeral 1 indicates the main body of a trench excavator equipped with crawler-type traveling devices 5, 5 driven by power from an engine 3. A truck 9 is attached to the main body 1 and is movable laterally in the width direction of the vehicle (arrow A in FIG. 2) by a third control device 7. Wheels 11 of trolley 9
is placed on a pair of rails 13 that span across the width of the vehicle. The third control device 7 is of a multi-stage type and consists of a piston 15 connected to the truck 9 and a cylinder 17 connected to the main body 1. The truck 9 is moved along the rails 13 and 13 by the expansion and contraction of the piston 15. It will now move laterally across the width of the vehicle.

The base of a support arm 19 that protrudes laterally from the main body 1 (downward in FIG. 2) is attached to and supported by the bearing of the truck 9 so as to be rotatable (as indicated by the arrow b in FIG. 2) by a second control device 21. , an excavation feeder 23 is fixedly supported at the tip. The bearing portion of the truck 9 is supported by a horizontal correction device (not shown) incorporated in the second control device 21 so that the excavation feed device 23 always acts correctly perpendicularly to the inclination of the main body 1. The arm 19 is held horizontally. The height H of the support arm 19 is set higher than the height of fences or guardrails used in the median strip.

The second control device 21 includes a piston 27 connected to a connecting rod 25 connected to the support arm 19, and a cylinder 29 fixedly supported by the bracket 9a of the truck 9. The expansion and contraction of the piston 27 allows the support arm 19, that is, the excavation feeder 23, to rotate via the connecting rod 25.

The excavation feed device includes a case 31 formed in a rectangular tube shape and long in the front and rear, and an excavation body 33 that rotates endlessly within the case 31.
They are mounted at approximately equal intervals on a chain 39 that is wound around a drive pulley 35 and a driven pulley 37 driven by a drive motor M mounted on the upper end side of the drive pulley 37.

The lower end side of the case 31 is largely cut out to form an excavated portion 41 in which the excavated body 33 is exposed. Further, a discharge port 43 is provided at the upper end, and the excavated material sent up along the inner wall surface 31a of the case by the excavating body 33 is discharged from the discharge port 43.

On the other hand, a long hole 45 is provided in the center of the case 31 and extends in the longitudinal direction. long hole 4
A pair of wheels 47, 47 are attached to wheel 4.
7 and 47 are supported by connecting shafts 51 and 51 of clamping bodies 49 and 49 that clamp the case 31 from left and right sides.

The clamping body 49 has a diameter slightly larger than the width L of the elongated hole 45, and the support arm 19 is fixed to the inner clamping body 49. A cylinder 53 of a first control device 51 is fixed to the bracket 39a of the holding body 49, and a piston 5 protrudes from the cylinder 53.
5 is fixed to a mounting flange 57 of the case 31. Therefore, by expanding and contracting the piston 55, the case 31 can be moved up and down while being supported by the wheels 47, 47, that is, the plowing depth can be adjusted.

Note that 59 is a belt conveyor type conveying device which is rotatably supported with respect to the main body 1, with a conveyance starting end 59a facing below the discharge port 43 and a conveyance terminal end 59.
b extends to the rear of the main body 1. The conveyance end portion 49b faces above the loading platform of a dump truck (not shown) that runs behind the main body 1.

In the trench excavator constructed in this manner, the excavation feeder 23 is in a storage position shown in chain lines in FIG. 2, in which it is stored in a substantially horizontal state during movement or after completion of work.

Next, the third control device 7 is activated to move the excavation feeder 23 in the retracted position to the working position (second
solid line). At this time, since the excavation feeder 23 is set at a higher position than the fence, it can be extended to the excavation position of the median strip without any problem. next,
After operating the second control device 21 and rotating the excavation part 41 side downward and the discharge port 43 side upward,
The first control device 51 is activated. As a result, the excavating portion 41 is set at a predetermined plowing depth position. Next, by driving the excavation body 33, the excavated soil is transported along the case inner wall surface 31a and discharged from the discharge port 43. The discharged excavated soil is sent to a dump truck (not shown) by a conveying device 59. below,
By running the main body 1, trench digging can be performed. After the work is finished, by operating the first control device 51, second control device 21, and third control device 7 in order, the excavation part 41 in the working state is raised by a predetermined amount, and then the device 23 is almost lifted up. It rotates to a horizontal state, then moves above the main body 1 and assumes the retracted position (dashed line in Figure 2).

[Conventional Effects] As explained above, according to the trench excavator of this invention, the excavation feed device can be made to protrude laterally from the main body, so it can be used even in the median strip of a highway. The excavation feed device can operate without any trouble and trench digging can be carried out. Furthermore, the excavation feeding device can be stored when not in use, so it does not get in the way. It can also be used for digging trenches on general roads.

[Brief explanation of the drawing]

FIG. 1 is a side view of the trench excavator of this invention, FIG. 2 is a plan view of the same, and FIG. 3 is a cutaway plan view of the excavation feed device. Explanation of main drawing symbols, 1...Main body, 7...Third control device, 19...Support arm, 21...Second
Control device, 23...Drilling feed device, 51...First
Control device.

Claims (1)

[Scope of utility model registration request] A self-propelled main body is provided with a support arm, an excavation device that can be moved up and down and rotated by a first control device and a second control device is attached to the arm, and the support arm is controlled by a third control device. A trench excavator characterized in that the excavation feed device is extendable and retractable between a working position in which it protrudes to the side of the main body and a storage position in which it is housed within the main body.