JPH1037236A - Groove backfill method and apparatus - Google Patents

Abstract

(57) [Summary] PROBLEM TO BE SOLVED: To perform a backfill operation of a groove extremely efficiently and with a small amount of labor and safely. SOLUTION: A vessel 4 mounted on a traveling vehicle is tilted backward to discharge earth and sand from a gate 6 provided at a rear portion thereof, and the earth and sand are discharged to a belt conveyor device 10 provided below the gate 6 of the vessel 4. Then, the conveyed material is transported to the side of the vessel 4 and the earth and sand are sequentially dropped into the groove 39 from the tip of the belt conveyor device while the traveling device is slowly traveling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for backfilling a trench dug in the ground such as a culvert.

[0002]

2. Description of the Related Art A trench excavated on the ground, for example, a trench for a culvert, is filled with gravel or rubble at the bottom thereof and then backfilled. As a conventional method of backfilling the groove, a predetermined amount of backfill material such as soil or gravel is accumulated at a predetermined interval position along the groove by a sediment transporting vehicle such as a crawler dump truck, and this is further added to a one-wheeled vehicle. They were loaded into the ditch, and were sequentially backfilled manually. Further, as a device used for backfilling, only a small crawler dump or a unicycle is used as described above.

[0003]

In the conventional method of backfilling a groove, a small crawler dump vehicle is used as a driving force. However, the method is substantially performed by using a unicycle or a shovel. And required a great deal of effort.

Means for Solving the Problems and Functions and Effects

An object of the present invention is to provide a method and an apparatus for backfilling a groove which can solve the above-mentioned conventional problems. The earth and sand is discharged from the gate provided at the rear by tilting the mounted vessel backward, and the earth and sand is transported to the side of the vessel by a belt conveyor device provided below the gate of the vessel, and the traveling device is moved. While running slowly along the groove, earth and sand were sequentially dropped into the groove from the tip of the belt conveyor device, and the groove was filled back. According to this method of backfilling the groove, most of the backfill of the groove can be performed with mechanical force, and the backfill operation of the groove can be performed extremely efficiently and safely with a small amount of labor.

A groove backfilling device for performing the above method is mounted on a traveling vehicle and capable of tilting rearward, and is provided at a rear end of the vessel and opens and closes downward from the rear end. And a belt conveyor device having an extension provided below the opening / closing portion of the gate, in a direction substantially perpendicular to the traveling direction of the traveling vehicle, and extending and extending at least one side to the side of the vessel. By tilting the vessel while driving the belt conveyor device and opening the gate with this,
Sediment discharged from the gate is conveyed to the side of the vessel from an extension of the belt conveyor device, and the traveling vehicle travels along the groove, in which the sediment falls from the belt conveyor device and is backfilled. It is. According to the groove backfilling device, a general earth and sand transporting vehicle such as a crawler dump can be used as a traveling vehicle of the device of the present invention with a slight improvement. And the earth and sand on the vessel can be continuously fed into the groove by the belt conveyor device.

Further, in the above groove backfilling device, the extension of the belt conveyor device can be folded upward by a conveyor folding means. When the belt conveyor device is not used, this extension is folded so that it can be folded. It can be prevented from hindering driving.

[0007] Further, a gate opening / closing cylinder device provided on a side wall of the vessel is connected to the gate,
The gate is opened and closed by a gate opening and closing cylinder device. According to this configuration, the adjustment of the supply amount of the earth and sand from the gate of the vessel onto the belt conveyor device is performed.
It can be performed arbitrarily and optimally regardless of the inclination of the vessel. Thereby, the tilting operation of the vessel can be facilitated.

Further, a detector for detecting that the vessel has dropped onto the frame of the traveling vehicle is provided, and the conveyor folding means can be operated only when the detector detects the vessel lowering state. Thus, the extension of the belt conveyor device can be folded only when the vessel is in the lowered state. According to this configuration,
Inadvertent folding operation of the belt conveyor device when the vessel is tilted can be prevented.

[0009]

Embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a crawler dump, which is a kind of traveling vehicle for transporting earth and sand, having a soil discharging device. The crawler dump 1 includes a crawler traveling device 2, an operator's cab 3 mounted on a front side of a frame thereof, and a vessel 4 mounted on a rear side of the frame so as to be tiltable rearward. Reference numeral 5 denotes a dump cylinder device that tilts this. A rear end wall of the vessel 4 is a gate 6, and upper left and right end portions thereof are pivotally supported by left and right pivot portions 8, 8 provided at the rear upper ends of the left and right side walls 7a, 7b of the vessel 4, respectively. The rear end of the vessel 4 is opened downward in a state where the vessel 4 is rotated rearward. The left and right ends of the gate 6 are connected via links to the tips of gate opening and closing cylinder devices 9 provided outside the left and right side walls 7a and 7b of the vessel 4,
The gate 6 is rotated by the expansion and contraction of the left and right gate opening / closing cylinder devices 9 to open and close the vessel 4.

A belt conveyor device 10 is provided outside the rear end of the vessel 4 in a direction substantially parallel to the opening / closing axis of the gate 6, and is suspended from the left and right pivots 8 of the gate 6. It is suspended and supported via members 11 and 11 so as to be rotatable in the same direction as the opening / closing operation direction of the gate 6.

The pivot portions 8, 8 of the gate 6 of the vessel 4 are as shown in FIG. 3, and the front ends of the brackets 13 on the left and right of the gate 6 are supported on the support shaft 12 supported by the side walls 7a, 7b. The suspension member 11 of the belt conveyor device 10,
Eleven bosses 14 are pivotably supported.

The belt conveyor device 10 includes a main body 10a having a length slightly longer than the width of the vessel 4, and a main body 1a.
0b, the extension members 10b are extended to one side so as to be bent upward from a substantially horizontal posture, and the hanging members 11, 11 are provided at both longitudinal ends of the machine frame 15a of the main body 10a. The main body 10a is opposed to the lower side of the gate opening of the vessel 4, and the extension 10
b protrudes to the side of the vessel 4 in an overhanging manner.

The belt conveyor device 10 includes a main body frame 15a.
And an extension frame 15b are connected at a pivot point 16 so as to be bent upward from a substantially horizontal posture.
Rollers 17a, 17 located at respective ends of 15b
The earth and sand transport belt 18 is wound around the b.
A hydraulic motor 19 is provided outside the extension frame 15b, and an extension-side roller 17b is connected to the hydraulic motor 19, and the roller 17b is a driving side. The frames 15a, 15b are connected by a belt conveyor folding cylinder device 20, and the extension frame 15b is rotated by the belt conveyor folding cylinder device 20. In FIG. 1, reference numeral 21 denotes a main frame 15a of the belt conveyor device 10 when the vessel 4 is lowered.
And 22 is a stopper for supporting the belt conveyor device 10 in a stable state when the vessel 4 is tilted (upwardly moved).

FIG. 6 shows a hydraulic circuit for driving the dump cylinder device 5, the gate opening / closing cylinder device 9, the belt conveyor folding cylinder device 20 and the hydraulic motor 19 for the belt conveyor.
The switching valve 24 is connected to the dump cylinder device 5. The hydraulic pump 23 is connected to a first electromagnetic switching valve 26 via a second switching valve 25, and the hydraulic motor 19 and the belt conveyor folding cylinder device 20 are connected to the first electromagnetic switching valve 26. Further, a second electromagnetic switching valve 27 is connected in parallel with the circuit of the hydraulic motor 10, and the gate opening / closing cylinder device 9 is connected via the second electromagnetic switching valve 27. Reference numerals 28 and 29 are flow control valves. The first electromagnetic switching valve 26 has positions A and B for selectively connecting the circuit to the hydraulic motor 19 and the circuit to the conveyor folding cylinder device 20 to the second switching valve 25.

The first switching valve 24 is switched by an operating member (not shown) to selectively supply pressure oil from the hydraulic pump 23 to the bottom side and the rod side of the dump cylinder device 5 to raise the vessel 4. And tilt or descend.

The second switching valve 25 is switched by a belt conveyor operating lever 30. The belt conveyor operation lever 30 is provided with a belt conveyor folding switch 31 and a gate opening / closing switch 32.
The switches 31, 32 and the first and second switches 31 and 32 are provided.
7 is connected to the electromagnetic switching valves 26 and 27 as shown in FIG.
Is connected to the solenoid 26a of the first electromagnetic switching valve 26 via a relay 33, and when the solenoid 26a is turned on, the first electromagnetic switching valve 26 is brought to the position B against the spring force and the belt By connecting the pump circuit to the conveyor folding cylinder device 20 and turning it off, the first electromagnetic switching valve 26 is set to the position A by the spring force, and the pump circuit is connected to the hydraulic motor 19 and the second electromagnetic switching valve 27. It is supposed to connect. In the electric circuit of the belt-conveyor folding switch 31, a limit switch 34 which is turned on by contacting the vessel 4 in the lowered state is interposed, and the second electromagnetic switch is provided only when the vessel 4 is in the lowered state. The switching valve 26 can be switched to the position B.

The gate opening / closing switch 32 includes a relay 35,
The solenoid valve 27 is connected to the solenoids 27a and 27b on both sides of the second electromagnetic switching valve 27 via 36, and by tilting the gate open / close switch 32 to the neutral position and left and right, the second electromagnetic switching valve 27 The position is switched to a neutral C position and D and E positions. 37 is a battery, 3
Reference numeral 8 denotes a chain for supporting the weight of the extended portion 10b of the belt conveyor device 10 in the stretched state.

With the hydraulic circuit configuration shown in FIG. 6 and the electric circuit configuration shown in FIG. 7, the dump cylinder device 5 is expanded and contracted by the switching operation of the first switching valve 24, and the vessel 4 tilts (dumps) and descends. Is made.

On the other hand, after the belt conveyor folding switch 31 is turned ON to set the first electromagnetic switching valve 26 to the position B, the belt conveyor operating lever 30 is operated to switch the second switching valve 25 from the neutral position to the left or right. As a result, the belt conveyor folding cylinder device 20 is extended or shortened, and the extension of the belt conveyor device 10 is folded or extended.

After the belt conveyor folding switch 31 is turned off to set the first electromagnetic switching valve 26 to the A position, the belt conveyor operation lever 30 is operated to one side, whereby the hydraulic motor 19 is rotated in the transport direction. You. In this state, when the gate opening / closing switch 32 is switched, the second electromagnetic switching valve 27 is switched.
The gate opening / closing cylinder device 9 is extended or shortened to open / close the gate 6 with respect to the vessel 4.

The operation of backfilling the groove 39 using the backfilling apparatus having the above-described structure will be described below. First, earth and sand are loaded into the vessel 4 at the earth and sand accumulation site. Vessel 4 at this time
Is in a lowered state, and the extension 10b of the belt conveyor device 10 is turned upward and folded. The lowering of the vessel 4 is performed by switching the first switching valve 24 to the lowering position with an operating member (not shown) to shorten the dump cylinder device 5. At this time, the limit switch 34 is ON when the vessel 4 is lowered.

The extension 10 of the belt conveyor device 10
The folding of b is performed by turning on the belt conveyor folding switch 31 to set the first electromagnetic switching valve 26 to the position B, and then using the belt conveyor operating lever 30 to switch the second switching valve 2.
Conveyor belt folding cylinder device 2 by switching 5
This is done by extending 0.

At this time, the gate 6 is closed. The closing operation of the gate 6 is performed when the conveyor folding switch 31 is turned off and the first electromagnetic switching valve 26 is turned off.
Is in the A position, and the gate opening / closing switch 32 is
Is performed by switching the second electromagnetic switching valve 27 to shorten the gate opening / closing cylinder device 9. At this time, the pressurized oil is also supplied to the hydraulic motor 19, which rotates. However, since the belt conveyor 10 is folded and the earth and sand transport belt 18 is slack, the earth and sand transport belt 18 does not run. Thereafter, the second switching valve 25 is set to neutral. In this state, the extension 10b of the belt conveyor device 10 is as shown by a chain line in FIG. At this time, the belt conveyor device 10 includes the pivot portion 8 of the gate 6,
8 and is supported by a stopper 21 at the rear end of the vessel 4.

The crawler dump 1 having the earth and sand loaded in the vessel 4 moves to the side of the groove 39 so as to be parallel to the groove 39. Thereafter, the second electromagnetic switching valve 26 is set to the position B by operating the lever and the switch, and the switching operation of the second switching valve 25 is performed to shorten the folding cylinder device 20 so that the extension portion 10b of the belt conveyor device 10 is moved. As shown in FIGS. 1 and 2, the crawler dump 1 is operated so that the vessel 4 protrudes to the side and the tip thereof is located above the groove 39.

Next, the conveyor folding switch 31
Is turned off, the first electromagnetic switching valve 26 is switched to the position A, and the second switching valve 25 is switched to drive the hydraulic motor 19. In this state, by operating the first switching valve 24, the dump cylinder device 5 is gradually extended to tilt the vessel 4, and the gate opening / closing cylinder device 9 is gradually extended by the second electromagnetic switching valve 27 so that the gate is opened. 6 is gradually opened and the crawler dump 1 is slowly moved forward or backward while observing the falling amount of the earth and sand at this time. The tilt switch of the vessel 4 turns off the limit switch 34, the first electromagnetic switching valve 26 in the tilted state of the vessel 4 becomes the A position, and the folding operation of the extension 10b of the belt conveyor device in this state cannot be performed.

As a result, the earth and sand in the vessel 4 falls from the opening of the gate 6 onto the belt 18 of the belt conveyor device 10 and is conveyed to one side, and falls into the groove 39 from the tip of the extension 10b. Groove 39 is backfilled with earth and sand.

At this time, the inclination angle of the vessel 4 is increased in accordance with the decrease in the amount of soil therein, and the opening width of the gate 6 is also increased accordingly. At this time, since the belt conveyor device 10 is suspended and supported by the pivot portion 8 of the gate 6, the belt conveyor device 10 is always positioned below the opening of the gate 6, as shown in FIGS. The posture at the time of the maximum inclination is maintained by the chain 22.
When the soil in the vessel 4 is exhausted, the above operation is repeated to fill the groove 39 sequentially. When the crawler dump 1 is running, the vessel 4 is lowered, and then the extension 10b of the belt conveyor device 10 is folded.

In the above embodiment, the extension 10b of the foldable belt conveyor device 10 is
May be provided on both sides.

[Brief description of the drawings]

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

FIG. 2 is a rear view showing the embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA in FIG. 1;

FIG. 4 is an operation explanatory view of the present invention.

FIG. 5 is an operation explanatory view of the present invention.

FIG. 6 is a hydraulic circuit diagram of the device of the present invention.

FIG. 7 is an electric circuit diagram in the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Traveling vehicle 2 ... Crawler traveling device 3 ... Driver cab 4 ... Vessel 5 ... Dump cylinder device 6 ... Gate 7a, 7b ... Side wall 8 ... Pivot support 9 ... Gate opening and closing cylinder device 10 ... Belt conveyor device 10a ... Main body 10b ... Extension part 11 ... Hanging member 12 ... Support shaft 13 ... Bracket 14 ... Boss 15a ... Machine frame 15b ... Extension frame 16 ... Pivot point 17a, 17b ... Roller 18 ... Sand transport belt 19 ... Hydraulic motor 20 ... Belt conveyor folding cylinder device DESCRIPTION OF SYMBOLS 21 ... Stopper 22 ... Chain 23 ... Hydraulic pump 24, 25 ... 1st and 2nd switching valve 26, 27 ... 1st and 2nd electromagnetic switching valve 28, 29 ... Flow control valve 30 ... Belt conveyor operation lever 31 ... Conveyor folding switch 32 ... Gate open / close switch 34 ... Limit switch 39 ... Groove

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toyomi Yamamoto Hokkaido 29, Memanbetsucho Koen-dori, Abashiri-gun 15-29 Limited company

Claims (5)

[Claims] 1. A vessel mounted on a traveling vehicle is tilted backward to discharge earth and sand from a gate provided at a rear portion thereof, and the earth and sand is discharged to a side of the vessel by a belt conveyor device provided below a gate of the vessel. Characterized in that earth and sand are successively dropped into the groove from the tip of the belt conveyor device while being conveyed to the vehicle and the traveling device is running slowly. 2. A vessel mounted on a traveling vehicle and capable of tilting rearward, provided at a rear end of the vessel,
A gate that opens and closes downward at the rear end, and an extension that is provided below the opening and closing part of the gate in a direction substantially perpendicular to the traveling direction of the traveling vehicle, and extends at least one side to the side of the vessel. And a belt conveyor device having a portion. 3. The groove back-filling device according to claim 2, wherein the extension of the belt conveyor device is foldable upward by a conveyor folding means. 4. A gate opening / closing cylinder device provided on a side wall of a vessel is connected to the gate.
An apparatus for backfilling grooves as described. 5. A method according to claim 1, wherein a detector is provided for detecting that the vessel has dropped onto the frame of the traveling vehicle, and the conveyor folding means can be operated only when the detector detects that the vessel has dropped. The groove backfilling device according to claim 3, wherein: