JPH07292715A - Earth and sand scraping-up device of trenching machine - Google Patents

Abstract

PURPOSE:To execute a work from digging of a groove to backfilling by means of one set of machine so as to remarkably improve working efficiency by scraping together earth and sand discharged on both sides of a digged groove with a blade provided on the rear part of a running machine body. CONSTITUTION:The ground in front of a running machine body 12 is digged by means of a trenching device, and earth and sand is discharged on the ground. Next after executing a work such as arrangement of cable in a digged groove 22, by advancing the running machine body 12, earth and sand discharged on the both sides is pressed with the right and left both end parts 24a, 24b of a blade 24 so as to be scraped together to the center part 24c, and hence the groove 22 is backfilled. In this case, surplus earth and sand 39 is escaped rearward through an opening hole 29 provided on the center lower part of the blade 24. A quantity of earth and sand passing the opening hole 29 is adjusted by moving up and down a weir 31 up/down adjustably provided on the opening hole 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trench excavating machine, and more particularly to a soil scraping device for backfilling excavated trenches.

[0002]

2. Description of the Related Art Conventionally, when a cable for electric power or communication is to be laid in the ground, first, a ditch is excavated by a backhoe or the like,
A cable is laid manually in the groove to backfill the earth and sand and roll the compaction.

[0003]

In the conventional cable burying work, the groove backfilling work is carried out manually, so that manpower is required and work efficiency is lowered.
Therefore, there is a technical problem to be solved in order to improve the work efficiency by enabling the work from the excavation of the groove to the backfill to be performed by one machine, and the present invention solves this problem. The purpose is to do.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and a groove excavating device is provided in the front part of a traveling machine body, and at the rear lower part of the traveling machine body, for scraping earth and sand. Blades are provided, an opening hole is opened in the lower center of the blade corresponding to the excavated groove width, and vertically adjustable weirs are provided in the opening hole. The present invention provides a soil scraping device for a groove excavating machine that is projected further forward.

[0005]

The ground excavation in front of the traveling machine body is excavated by the trench excavator, and the earth and sand are discharged to the ground. When the traveling machine body is moved forward after performing work such as piping a cable into the excavated groove, the earth and sand discharged to the side of the groove is pressed by the left and right ends of the blade.

Both left and right end portions of the blade project forward from the central portion, and the inclination of the blade scrapes earth and sand toward the central portion to backfill the groove. When the cable is buried, the amount of earth and sand corresponding to the volume of the cable is surplus at the time of backfilling, but the surplus earth and sand is allowed to escape rearward from the opening hole opened at the lower center of the blade. The amount of sediment passing through the opening is adjusted by moving the weir up and down.

[0007]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a cable burying machine 11, in which a groove excavating device 13 is provided in a front portion of a traveling machine body 12. The groove excavator 13 is provided with a belt-type cutter 14, and the motor 15 is rotated to continuously excavate the ground.

It should be noted that the belt type cutter 14 is provided with an earth discharging plate (not shown) at various places, and when the cutter 14 is driven by a motor, the excavated earth and sand are continuously discharged. Is done. Further, the support arm 16 of the groove excavating device 13 is pivotally attached to the central portion of the traveling machine body 12, and is formed so that the groove excavating device 13 can be lifted and lowered by the operation of an actuator 17 such as a hydraulic cylinder. Therefore,
If the angle of the support arm 16 is adjusted, the trench excavation device 1
The excavation depth by 3 can be changed arbitrarily.

On the other hand, the cable 18 for electric power, communication, etc. is wound around the pipe reel 19 in advance, and the pipe reel 19 is rotatably mounted on the rear portion of the traveling machine body 12. The cable 18 drawn out from the pipe reel 19 is guided by guides 20 and 21 provided in the groove excavating device 13 and is drawn out to the rear of the groove excavating device 13. Then, when the traveling machine body 12 moves forward, the cutter 14 of the groove excavator 13 continuously excavates the ground, and the earth and sand discharge plate discharges the earth and sand to form the groove 22 and the pipe reel 19 The cable 18 fed from is laid on the bottom of the groove 22.

Here, at the lower rear portion of the traveling machine body 12, a soil and sand scraping device 23 is provided, and the sand and sand scraping device 23 vertically expands the blade 24 and vertically moves the blade 24 up and down. It is composed of an actuator 25 such as a hydraulic cylinder. Further, a rolling device 26 is provided at the rear part of the earth and sand scraping device 23, and a roller 28 is attached to the rear part of the blade 24 via a link mechanism 27. The roller 28 rolls the earth and sand scraped by the blade 24.

The earth and sand excavated by the groove excavator 13 and discharged to the ground are scraped by the blade 24 to the central portion and the groove 22 is backfilled. Further, the backfilled earth and sand is rolled by the roller 28, and the ground is laid evenly. Next, referring to FIGS. 2 and 3, the earth and sand scraping device 23 will be further described. The left and right end portions 24a, 24b of the blade 24 have a central portion 24.
It protrudes to the front position from c and has a substantially V shape in a plan view, and is formed so that when the traveling machine body 12 moves forward, the soil discharged on the side of the groove 22 is scraped to the central position. . Further, by moving the blade 24 up and down by the left and right actuators 25, 25, the scraping height of soil and sand can be arbitrarily adjusted.

Here, as shown in FIGS. 3 to 5, an opening hole 29 is opened at a lower position of the central portion 24c of the blade 24, and guide rails are provided on both left and right sides of the opening hole 29. A weir 31 is provided by fixing 30 and 30. The weir 31 is provided with a vertical adjustment mechanism 32. An example of the vertical adjustment mechanism 32 will be described. The weir 31 has a connecting portion 33.
And the lower end of the screw 34 is fitted. A nut 35 is screwed onto the upper portion of the screw 34, and a support piece 36 is fixedly mounted on the upper end of the blade 24 to rotatably lock the nut 35.

When the operator rotates the nut 35 in either the left or right direction, the screw 34 screwed into the nut 35 moves up and down, and the weir 31 is attached to the guide rails 30, 30. Move up and down along. The configuration of the vertical adjustment mechanism 32 should not be particularly limited,
The position of the nut may be fixed and the screw may be rotated. Further, although not shown, if the nut and the screw are rotated by driving the motor, the labor of the operator can be reduced and the remote operation can be performed. Also,
Weir 31 by connecting other actuators such as a hydraulic cylinder
May be configured to move up and down.

In the meantime, although the height of the weir 31 is changed steplessly, in the structure in which the weir is fixed by bolt mounting, the mounting position of the bolt must be moved. The weir height is raised and lowered in stages. Generally, when the groove 24 is backfilled by the blade 24, the earth and sand are surplus by the amount corresponding to the volume of the cable. In the present invention, since the opening hole 29 is opened in the central portion 24c of the blade, the surplus earth and sand 37 is released to the rear of the blade 24.

Since the surplus earth and sand 37 changes depending on the diameter of the buried cable, the weir 31 is moved up and down by the operation of the vertical adjusting mechanism 32 to adjust the amount of the surplus earth and sand 37 passing through the opening 29. Further, since the width dimension of the opening hole 29 is the same as or slightly narrower than the width of the groove 22,
All the excavated earth and sand are backfilled in the trench 22. Then, as the traveling machine body 12 moves forward, the blade 24 scrapes the discharged earth and sand to the central portion and refills the groove 22. The surplus earth and sand 37 remaining at the time of backfilling is released rearward from the opening hole 29 and rolled by the roller 28 while the embankment shape is formed by the weir 31.

The present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modifications.

[0017]

As described in detail in the above one embodiment, the present invention can perform both ground excavation work and backfill work by one machine, and one operator can excavate and backfill the trench. Work is possible. Therefore, labor saving is achieved and working efficiency is significantly improved.

In addition, since the blade for scraping sand and sand is provided with the opening hole and the weir which can be adjusted up and down is provided, surplus sand and sand generated when the groove is backfilled is released to the rear of the blade and the rear roller If the soil is excavated, the excavated earth and sand can be extremely efficiently backfilled in the trench, contributing to the improvement of the backfill work quality.

[Brief description of drawings]

FIG. 1 is a side view of a cable burying machine showing an embodiment of the present invention.

FIG. 2 is a side view of a main part of the earth and sand scraping device.

FIG. 3 is a plan view of a main part of the earth and sand scraping device.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 11 Cable burying machine 12 Traveling machine body 13 Groove excavator 22 Groove 23 Sediment scraping device 24 Blades 24a, 24b Both ends 24c Central part 29 Opening hole 31 Weir 32 Vertical adjustment mechanism

Claims (1)

[Claims] 1. A groove excavating device is provided in the front part of the traveling machine body, and a blade for scraping sand is provided in the lower rear part of the traveling machine body, and an opening is formed in the lower center part of the blade corresponding to the excavated groove width. An earth and sand scraping device for a groove excavating machine, characterized in that a hole is opened, a weir which can be adjusted up and down is provided in the opening hole, and further, both left and right ends of the blade are projected from a central part to a front position.