JPH1018344A - Backfilling device of ditch and backfilling method of groove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and efficiently backfill earth and sand accumulated on both sides of a ditch by installing earth removing plates expansively opened forward in a bottom opened inverse V letter shape in front of a traveling vehicle, and making the vehicle travel by striding over the ditch. SOLUTION: Mutual inside edge parts are connected to a front part of a traveling vehicle 2, and two earth removing plates 3 and 3 expansively opened forward in the traveling direction in a bottom opened inverse V letter shape are fixed together through a connecting member 32 so that the respective lower edges run along the vicinity of the ground surface, and a backfilling device 1 is formed. A cross-sectional shape of the respective earth removing plates 3 is formed in a plane shape or a circular arc shape, and the lower edge is preceded forward more than the upper edge. When the vehicle 2 is made to travel in a condition of striding over a ditch R, earth and sand distributed left and right by being dug out at the ditch R excavating time, are moved to the central part along the respective earth removing plates 3, and fall in the ditch R, and are backfilled at one time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trench backfilling device and a trench backfilling method for burying pipes, cables, and the like in excavated trenches.

[0002]

2. Description of the Related Art Generally, a trench is excavated by using an excavating machine such as a trencher or a backhoe, a laying object such as a pipe or a cable is laid at the bottom of the trench, and then the earth and sand is buried again to bury the laying object. That is being done.

[0003] This backfilling work is also performed manually by a worker using a scoop, but usually, the backfill work shown in FIG.
As shown in FIG. 0, a bulldozer provided with an earth removal plate at the front of a vehicle is used.

[0004]

By the way, the earthing plate of the bulldozer is arranged so that one end on the left and right ends ahead of the other end, and the earthing plate from the leading end toward the other end. Because it is made to move the earth and sand along, in order to backfill the excavated and deposited earth and sand on both sides of the trench, it is necessary to perform backfill work one by one,
There is a problem that it takes time to work. In addition, it is necessary to position a wheel or a crawler (infinite track) at the edge of the groove, and at the same time, run the vehicle so that the vehicle does not fall into the groove. Also, at this time, the edge of the groove may be landslide due to the weight of the vehicle, and there is also difficulty in safety.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a trench backfilling device capable of safely and quickly filling back the excavated earth and sand when the trench is excavated. is there. Another object of the present invention is to provide a method for backfilling a trench, which can efficiently backfill the excavated earth and sand when the trench is excavated.

[0006]

According to the present invention, there is provided an apparatus for backfilling a groove, comprising a traveling vehicle capable of traveling on the ground, provided with at least two earth-discharge plates. In the forward direction of the traveling direction, while being expanded in the shape of a letter or a figure, the lower edge of each earth removal plate is supported so as to be in contact with the ground or along the vicinity of the ground, and straddles the groove. By running the traveling vehicle, the soil deposited on both sides or one side near the groove is moved along the earth removal plate to the groove and backfilled.

Further, according to the method of backfilling a groove of the present invention, the lower end edges of the two earth-discharge plates expanded in a Λ-shape or an 8-shape toward the front in the traveling direction of the traveling vehicle come into contact with the ground. Or so that it is supported along the vicinity of the ground, and by running the traveling vehicle across the groove, the sediment deposited on both sides or one side near the groove is moved to the groove along the earth removal plate And backfill.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a groove backfilling device 1 according to the present invention. The backfilling device 1 is provided at a front portion of a traveling vehicle 2 which can be driven by a power source (not shown). It is composed of two earth discharging plates 3 and 3.

The earthing plates 3 are formed so that their inner edges are connected to each other and are expanded in a Λ (lambda) shape toward the front in the vehicle traveling direction. It is fixed to the traveling vehicle 2 via a connecting member 31 so as to be in contact with the ground or along the vicinity of the ground. The outer edge of each of the earth discharging plates 3 is set so as to be located further outside than where the excavated earth and sand is deposited on the right and left of the groove R. In addition, each dump plate 3
The cross-sectional shape is a flat plate shape (see FIG. 2A) in which the lower end edge precedes the upper end edge. Bend or curve toward (see FIGS. 2 (b) and (c)),
The upper and lower ends can be curved forward (see FIG. 2D), and further, an arc shape (see FIG. 2E) can be selected.

Therefore, when the traveling vehicle 2 is run while straddling the groove R, the earth and sand excavated during the excavation of the groove R and distributed to the left and right move to the center side along each of the earth discharging plates 3. Since it is made to fall into the groove R, the earth and sand deposited on the left and right of the groove R can be backfilled at a time, and the working time and thus the construction period can be greatly reduced. Moreover, since it is sufficient to make the vehicle travel so that the straddled groove R is substantially at the center of the wheel or crawler of the traveling vehicle 2,
In addition to being able to work without paying much attention, there is almost no possibility that the edge of the groove R will collapse on the ground, and the work can be performed safely.

In this case, if large stones or sharply angled stones are mixed in the earth and sand to be backfilled, the stones collide with the laid object such as the pipe P at the time of backfilling. The stone is buried in contact with the laid object such as the pipe P. In particular, a plastic pipe having a low pipe strength may be damaged at the time of backfilling, or by land subsidence or traffic of vehicles such as trucks. For this reason, the apparatus and method for backfilling the excavated earth and sand as it is can be used in the case of soil that does not contain stones such as fields or sandy areas, or in pipes having strength such as cast iron pipes.
It can be suitably adopted when burying the like.

In the above-described embodiment of the earth discharging plate 3, the case where the inner edges are connected to each other to close the center portion and form a Λ-shape is exemplified. The central portion may be opened without connection and formed in an eight-letter shape.
In this case, the respective earth removal plates 3 are connected to the traveling vehicle 2 by the connecting members 3.
What is necessary is just to fix separately via 1 and 31, and to support them so that the lower edge may contact the ground or along the vicinity of the ground.

Although the traveling vehicle 2 is shown traveling on a crawler, it may be traveling on wheels.

By the way, in the above-described embodiment,
A case has been described in which the groove backfilling device 1 is configured by the two earth discharging plates 3 and 3, and the earth and sand is directly buried in the groove R by the earth discharging plates 3 and 3, as shown in FIG. The groove backfilling device 1 is composed of two earth discharging plates 3 and 3 and transport screws 4 and 4 rotatably provided on the front surfaces of the earth discharging plates 3 and 3, respectively. The earth and sand dug out by the backfilling device 1 including the plate 3 and the transport screw 4 may be backfilled in the groove R.

[0016] The two earth discharging plates 3 and 3 in this embodiment.
Are open without their inner edges being connected, and as a result, the two earth-discharge plates 3, 3 are expanded in an eight-character shape toward the front in the vehicle traveling direction. Each of the earth discharging plates 3 is formed so as to have an arc surface having an inner diameter slightly larger than an outer diameter of a transport screw 4 described later.

Each connecting member 31 fixed to each of the earth discharging plates 3 is rotatably supported about a horizontal axis provided at the tip of a frame 21 protruding forward of the traveling vehicle 2. A storage cylinder 32 is disposed between each of the connecting members 31 and the frame 21. Therefore, by extending and retracting the storage cylinder 32, each of the earth discharging plates 3 is moved to a work position where the lower end edge is in contact with the ground or a work position along the vicinity of the ground (FIG.
(See (b) solid line position) and the storage position above each work position (see FIG. 3 (b) chain line position).

On the other hand, each transport screw 4 is composed of a rotating shaft 41 and a spiral screw blade 42 provided on the rotating shaft 41, and the rotating shaft 41 is arranged such that the lower end of the outer periphery of the screw blade 42 is substantially in contact with the ground. Each of the earth discharging plates 3 is rotatably supported by bearings (not shown) provided on the outer edge and the inner edge of the front surface. A drive motor 43 is attached to the back side of the outer edge of each of the earth removal plates 3.
A transmission mechanism 44 such as a chain sprocket is disposed between the output shaft 3 and the rotation shaft 41 of each transport screw 4. Therefore, by rotating the drive motor 43, each transport screw 4 can be rotated via the transmission mechanism 44.

A support roller 5 is provided at an outer edge of each of the earth discharging plates 3. This support roller 5
Is provided, it is possible to prevent the outer edge of each of the earth discharging plates 3 and 3 from hanging down by its own weight, thereby cutting the ground and increasing the running resistance.

Further, an outer edge of each of the earth discharging plates 3 can be freely moved up and down by an elevating mechanism (not shown) attached to the upper part of each of the supporting rollers 5, and a lower end edge of each earth discharging plate 3 and the ground And the gap can be freely adjusted. That is, it can be set arbitrarily so that the lower edge of each of the earth discharging plates 3 is in contact with the ground or along the vicinity of the ground. Therefore, for example, when a large stone or the like projects on the ground surface, the lower end edge of each of the earth discharging plates 3 and the ground are arranged so that the lower edge of the earth discharging plate 3 does not collide with the exposed stone. Can be increased in advance to avoid obstacles.

FIG. 4 shows an example of the lifting mechanism. In the case of this elevating mechanism, a screw rod 52 is rotatably supported by a bracket 51 provided on the outer edge of the earth discharging plate 3, and a support member 54 for the screw rod 52 and the roller 53 is provided.
Female screw 55 is screwed. A handle 56 is attached to the upper end of the screw rod 52. Therefore, by rotating the handle 56, the interval between the lower edge of the earth discharging plate 3 and the lower edge of the roller 53 can be freely set. Therefore, it is possible to arbitrarily set the interval between the lower edge of the earth removal plate 3 and the ground.

Further, scraping portions 15 are provided at intervals on the outer peripheral edge of the screw blade 42 of the transport screw 4 in FIG. 4, and when the transport screw 4 rotates, the scraping portions 15 It is designed to cut through the sediment deposited near the area. Furthermore, the scraping unit 1
Reference numeral 5 also serves to prevent stones or the like protruding above the ground from being dug up or crushed, thereby preventing the lower edge of the earth removal plate 3 from being damaged by collision with the exposed stones or the like. .

The scraping portion 15 may be a scraper 15A made of a steel block as shown in FIG. 4 or a scraper 15A (see FIG. 4) having a cemented carbide tip 152 as described later. 17).

A ski 33 is provided at the tip of the connecting member 31 shown in FIG. 3, and the inner edge of the discharging plate 3 is formed by the weight of the connecting member 31, the discharging plate 3 and the screw blade 42. Is supported so that it does not hang down. In other words, the inner edge of each of the earth discharging plates 3 is prevented from hanging down, thereby preventing the ground from being ground and increasing the running resistance.

Further, a chain 34 is stretched between the connecting member 31 and the outer edge of each of the earth discharging plates 3. Therefore, when the storage cylinder 32 is contracted and each of the earth discharging plates 3 is rotated to the storage position away from the ground, the chain 34
Is lifted and held so that the outer edge of each of the earth discharging plates 3 does not hang down by its own weight.

Therefore, when backfilling the groove R, first, the traveling vehicle 2 is moved to a position straddling the excavated groove R, the storage cylinder 32 is extended, and the earth discharging plate 3 is turned to the working position. Move. Here, the support roller 5
The handle 56 is rotated to raise and lower each earth removal plate 3,
Fine adjustment is performed so that the lower end edge is in contact with the ground or along the vicinity of the ground. Next, the drive motor 43
Is rotated to drive the transport screw 4 and then the traveling vehicle 2 is moved forward, so that the screw blades 42 of the transport screw 4 hit the mountain of sediment distributed to the left and right of the groove R. Here, the earth and sand scraped off by the screw blade 42 is turned into a spiral screw blade 4.
As the 2 rotates, it is conveyed in the direction of the inner edge along the surface of the arc-shaped earth discharging plate 3 and falls into the groove R. Thus, the earth and sand deposited on the left and right of the groove R can be backfilled at a time.

When the backfilling operation is completed, the storage cylinder 32 is contracted, the earth discharging plate 3 is lifted from the operation position to the storage position, and the traveling vehicle 2 can travel to the destination.

On the other hand, FIG. 5 shows the ski 33 shown in FIG.
Instead, a backfilling device 1 in which a plurality of support rollers 5 are provided on each of the earth discharging plates 3 is described. That is, the support roller 5 is provided at the center on the back side along with the outer edge of each of the earth removal plates 3, and by rotating each handle 56, the lower end edge of each of the earth removal plates 3 and the ground are grounded. Can be adjusted. The other structure is almost the same as that of the embodiment shown in FIG. 3, and the detailed description is omitted.

FIG. 6 shows another embodiment of the backfill apparatus 1 of the present invention. In this embodiment, each of the earth discharging plates 3 is pivotally supported around a horizontal axis C extending in the vehicle traveling direction. That is,
Each of the earth discharging plates 3 can swing individually according to the inclination of the ground. Although not shown in detail, each of the earth removal plates 3 is provided with a support roller 5, a ski 33, and the like, so that the distance between the inclined ground surface and the lower edge of each earth removal plate 3 is always kept constant. It has been made.

Therefore, in addition to the case where the earth and sand is deposited on the horizontal ground (see FIG. 7A), the case where the earth and sand is deposited on the ground inclined to one of the right and left sides (see FIG. 7B). ) Or when soil is deposited on the ground where one of the right and left sides is inclined at a certain angle (see FIG. 7 (c)), and further when the soil is deposited on the ground that is depressed in a concave shape (see FIG. 7C). 7 (d)) or when earth and sand is deposited on the convexly protruding ground (see FIG. 7 (e)), each of the earth discharging plates 3 is moved to the lower end in accordance with their inclination. It can be supported and moved so that the edge touches the ground or along the vicinity of the ground. As a result, even if the trench R is excavated on any slope, the soil deposited on the left and right sides can be backfilled at once.

The inner edges of the respective earthing plates 3 which are pivotally supported are not necessarily connected to each other, but are attached to the horizontal axis C as shown in FIG. The connected state may be established by the hinge 35 provided. Further, a universal joint, a connected ring, a hook, or the like can be used instead of the hinge 35.

Further, as shown in FIG. 9, the lower end edge of the earth discharging plate 3 swings following the inclined surface of the ground. The present invention can also be applied to the device 1. In this embodiment, the horizontal axes C, C are set so as to be located at intermediate positions in the longitudinal direction of the respective earthing plates 3, and as a result, each earthing plate 3 moves around the horizontal axes C, C. Each pivots to correspond to various inclined surfaces.

By the way, the backfilling apparatus 1 in which only the earth removal plates 3 and 3 are provided on the traveling vehicle 2 has been described above. However, in this case, in addition to the traveling vehicle 2 provided with only the earth discharging plates 3 and 3, a traveling vehicle equipped with a trench excavating device for excavating the trench R is required, and the efficiency is poor.

Therefore, the trench excavator and the earth removal plates 3 and 3 are provided in one traveling vehicle 2 and the trench R is excavated by the trench excavation device. It was demanded that the two work processes of backfilling the excavated earth and sand in the trench R be performed by one unit.

FIG. 10 shows a backfilling device 1 provided with two earth-discharge plates 3 and 3 which are expanded in an eight-character shape in the forward direction of the traveling vehicle 2, and further excavation of a groove R is performed. An embodiment with a trenching device 11 for performing is shown.

Since the backfilling device 1 has already been described, only the trenching device 11 will be described below in detail.

The groove digging device 11 includes a support 12 rotatably supported on the traveling vehicle 2 about a horizontal axis, and a screw auger 13 rotatably supported at both upper and lower ends of the support 12. The outlet 121a of the support 12 (FIG. 1)
1 and FIG. 12).

The support 12 is connected to the tip of a boom 24 which is rotatably supported on a swivel 22 of the traveling vehicle 2 via an up-and-down cylinder 23. That is, the support 12 is undulated. As shown in FIGS. 13 and 14, the support 12 has a substantially semi-cylindrical front cover 121.
And a substantially semi-cylindrical back cover 122 with a U-shaped reinforcing member 123 welded to the outer peripheral surface, and flanges on both sides thereof are connected to each other by bolts and nuts, and assembled into a cylindrical shape. Then, on the upper part of the back cover 122,
A front cover 121 that is shorter than the back cover 122 is provided, and a discharge port 121 is provided above the front cover 121.
a is open. As a result, the screw auger 13 described later can be accommodated in a space having a circular cross section formed by connecting the front cover 121 and the rear cover 122 with the lower half thereof exposed.

The front cover 121 can be selected to have an appropriate length according to the depth of the groove R excavated by the screw auger 13. That is, the position at which the lower end of the support 12 reaches (the depth of the excavation groove R) can be adjusted by the expansion and contraction operation of the undulating cylinder 23, and the ground of the screw auger 13 can be adjusted according to the depth of the excavation groove R. A front cover 121 having an appropriate length may be used so as to cover the upper part from the front. In addition, the excavation groove R
Depending on the depth, an auxiliary front cover (not shown) may be connected to the lower end of the front cover 121 having a fixed length.

On the other hand, the screw auger 13 is formed by welding a screw blade 132 to the outer peripheral surface of a rotating shaft 131, and the rotating shaft 131 is rotatable on bearings 138, 138 provided near the upper and lower ends of the support 12, respectively. It is pivoted on. As shown in detail in FIGS. 15 and 16, a drive motor 133 is attached to the boom 24, and a sprocket 134 fixed to an output shaft of the drive motor 133 and a sprocket 134 fixed to an upper end of the rotation shaft 131. The chain 13 whose tension can be adjusted by the chain tensioner 136a is provided between the chain 13 and the sprocket 135.
6 is wound. Therefore, by rotating the drive motor 133, the rotation shaft 131, that is, the screw blade 13 is rotated via the chain sprocket.
2 can be rotated.

The mounting position of the driving motor 133 for rotating the screw auger 13 is not particularly limited. For example, the driving motor 133 may be disposed on the back cover 122 side of the support 12. You may make it connect directly to an upper end. The driving motor 133 is
When it is directly connected to the chain, no chain sprocket is required.

The rotating shaft 1 of the screw auger 13
The bearing 138 that supports the upper end of the support 31 is not necessarily the support 1
2 may be provided, for example, near the tip of the boom 24 located above the support 12.

The rotating shaft 1 of the screw auger 13
A tip screw blade 137 (see FIG. 11) is connected to the lower end of the lower end of the lower end bearing 138. For this reason, the tip screw blade 137 scrapes the earth and sand below the lower end bearing 138, and further lifts the earth and sand deposited on the bottom of the groove R. Also,
The rotation of the lower end portion of the screw blade 132 and the tip screw blade 137 welded to the rotating shaft 131 prevents the lower end bearing 138 and the lower end portion of the support 12 from directly contacting the ground and scraping off the soil.

Further, on the outer peripheral edge of the screw blade 132, scraping portions 15 are provided at intervals.
When the screw auger 13 rotates, the scraping unit 15 scrapes off the soil and rock at the end of the groove R in the traveling direction, and the scraped earth and rock are taken into the screw blade 132.

As shown in FIG. 17, the scraping section 15
Shaft 151 provided with cemented carbide tip 152 at the tip
Scraper 15 having 51a and peripheral groove 151b formed
The shaft 151 of the scraper 15A is inserted into a hole formed in a holder 153 welded to the lower surface of the outer peripheral edge of the screw blade 132. Circumferential groove 151b of shaft 151 of scraper 15A and holder 153
In the gap formed by the inner peripheral groove 153a formed on the inner peripheral surface of the hole, a ring-shaped spring 154 with a notch is provided.
Is attached. In this way, the scraper 15A is held by the holder 153 via the notched ring-shaped spring 154.
The pivot 1 is rotatably supported on the rim 1 of the scraper 15A.
51 a is brought into contact with the end face of the holder 153. Note that the cemented carbide tip 152 of the scraper 15A was used.
If the shaft is worn or missing, if the rear end of the shaft 151 is hit, the notched ring-shaped spring 154 is compressed and reduced in diameter, so that the shaft 151 can be pulled out forward and replaced. The scraper 15A has a tip including the cemented carbide tip 152 protruding outward from the outer peripheral edge of the screw blade 132, and its axis is directed obliquely downward in the rotation direction of the screw auger 13. I have.

The scraper 15A may be provided at a position where the groove R is substantially excavated, specifically, at the screw blade 132 exposed below the front cover 121. However, it is preferable that the holder 153 is previously welded to the screw blade 132 to a height position corresponding to the maximum depth position at which excavation can be performed, in case the depth of the groove R to be excavated is changed.

The above-mentioned tip screw blade 1
A scraping device 15 </ b> A as the scraping unit 15 is also provided on the outer peripheral edge of 37.

By the way, the front cover 121 of the support 12
A chute 14 having a forked tip is connected to a discharge port 121a opened at the top of the box. A base end of the separator 141 is rotatably supported at an intermediate position of the chute 14 so that the earth and sand discharged from the discharge port 121a can be equally distributed to the left and right. Therefore, when the soil excavated on the left and right of the groove R cannot be deposited due to the surrounding conditions,
By using the separator 141, the earth and sand can be discharged to only one side of the groove R.

Next, the digging device 11 constructed as described above
The operation of will be described.

First, the tip of the screw auger 13 is brought into contact with the ground. Next, the driving motor 133 is rotated to rotate the screw auger 13, and the traveling vehicle 2 is gradually advanced while the up-and-down cylinder 23 is reduced. By doing so, the tip of the screw auger 13 reaches a desired depth without the tip of the support 12 scraping the ground or the bottom of the groove R. Here, the lower end of the front cover 121 is located near the ground surface.

When the traveling vehicle 2 is moved forward in this state, the scraper 15A projecting from the outer peripheral edge of the spiral screw blade 132 attached to the screw auger 13 removes the earth and sand at the tip of the groove R. It is scraped and dropped on the screw blade 132.

At this time, since the support 12 that supports the upper and lower ends of the screw auger 13 is strongly reinforced by the reinforcing member 123, it supports a large load applied to the screw auger 13 when the groove R is excavated. , Rotating shaft 1
It is possible to prevent the rear cover 31 and the rear cover 122 from being deformed.

The scraper 15 is attached to the outer periphery of the screw blade 132 attached to the screw auger 13.
By providing A, even if the earth and sand contains rock, the rock can be scraped or crushed and taken into the screw blade 132.

On the other hand, the earth and sand that has fallen on the upper surface of the screw blade 132 is substantially cylindrically formed by the semi-cylindrical back cover 122 and the tip of the substantially semi-cylindrical groove R when the screw blade 132 rotates. 14 (see FIG. 14). Initially, the pushed up earth and sand is partially pushed out through a gap between the front cover 121 of the support 12 and the ground. And
The extruded earth and sand accumulates on the ground in front of the front cover 121 in a small mountain shape. In this way, the gap between the front cover 121 and the ground is closed, and when the accumulated sediment reaches a certain amount, the mound-shaped sediment acts as a resistance, thereby preventing further extrusion of the sediment.

Therefore, hereafter, the screw blade 1
32, which has been pushed up by the back cover 1
Through a cylindrical space (see FIG. 13) formed by the front cover 121 and the front cover 121, it is pushed up to a discharge port 121 a formed on the upper part of the front cover 121, and is discharged from the discharge port 121 a. .

The earth and sand discharged from the discharge port 121a is equally distributed to the right and left of the groove R via the chute 14 and falls.

However, as shown in FIG. 19, without providing the front cover 121, the discharge port 121a, the chute 14, etc., the earth and sand scraped off by the scraping portion 15 of the screw blade 132 is pushed up onto the ground surface, and the groove R is formed. The groove digging device 11 that only deposits on both sides may be used.

Thus, a relatively wide groove R corresponding to the outer diameter of the screw blade 132 is formed at a substantially constant depth.
It can be excavated continuously in a straight line or in a curved line. At this time, the traveling speed can be arbitrarily set depending on conditions such as soil properties, types of rocks contained in the soil, and the like. In addition, since the excavated earth and sand is deposited only in a narrow area near the excavated groove R, the excavated earth and sand does not scatter over a wide area and pollute the surrounding environment.

When the traveling vehicle 2 is moved or stored, the digging device 11 is turned to the side of the earth removal plate 3 of the backfilling device 1, so that the space restriction can be eliminated.

When the trench digging device 11 and the earth removal plates 3 and 3 are provided in one traveling vehicle, the digging work of the trench R and the backfilling work of the earth and sand dug at that time are performed by one unit. Since this can be performed, the overall cost can be reduced as compared with a case where a trench excavating device and a backfilling device are separately prepared.

On the other hand, when the trench R is excavated, a pipe or the like is laid at the bottom. In this case, since the groove R is excavated to a relatively large width substantially corresponding to the outer diameter of the screw blade 132, the connection work between pipes and the attachment work of a branch pipe or the like can be easily performed in the groove R. It can be carried out. In addition, the work of laying a pipe having a relatively large diameter can be easily performed.

[0062]

As described above, according to the present invention, earth and sand excavated when a trench is excavated can be safely and efficiently backfilled in a short time.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state of backfilling earth and sand according to a first embodiment of a trench backfill apparatus of the present invention.

FIG. 2 is a vertical cross-sectional view of a discharge plate.

FIG. 3 is a plan view and a side view showing a second embodiment of the groove backfilling device of the present invention.

FIG. 4 is a perspective view showing a groove backfilling device substantially similar to FIG.

FIG. 5 is a plan view and a side view showing a third embodiment of the groove backfilling device of the present invention.

FIG. 6 is a front view showing a fourth embodiment of the groove backfilling device of the present invention.

FIG. 7 is an explanatory diagram showing the relationship between earth and sand deposited on the left and right sides of an excavated trench and a dump plate.

FIG. 8 is a cross-sectional view showing a part of an example of a rocking mechanism of a soil discharge plate with a part thereof omitted.

FIG. 9 is a front view showing a fifth embodiment of the groove backfill apparatus of the present invention.

FIG. 10 is an explanatory diagram showing a state of backfilling earth and sand according to an embodiment in which a trench excavating device is added to the trench backfilling device of the present invention.

FIG. 11 is an explanatory diagram showing a groove digging state by the groove digging device shown in FIG. 10;

FIG. 12 is an explanatory diagram showing a groove digging state by the groove digging device shown in FIG. 10;

FIG. 13 is a sectional view taken along line AA of FIG. 11;

FIG. 14 is a sectional view taken along line BB of FIG. 11;

15 is a sectional view taken along line CC of FIG.

16 is a sectional view taken along line DD of FIG.

FIG. 17 is a perspective view showing a scraper provided on a screw auger, a cross-sectional view thereof, and an exploded perspective view showing a partly omitted illustration.

FIG. 18 is a perspective view showing a digging state by the digging device.

FIG. 19 is an explanatory diagram showing a digging state by another digging apparatus.

FIG. 20 is an explanatory diagram showing an operation state in which earth and sand dug out by a bulldozer are backfilled.

[Explanation of symbols]

 Reference Signs List 1 groove backfilling device 2 traveling vehicle 22 turntable 23 hoisting cylinder 24 boom 3 earth discharging plate 4 transport screw 41 rotating shaft 42 screw blade 43 drive motor 44 transmission mechanism 5 support roller 56 handle 11 groove digging device 12 support 121 front Cover 121a Discharge port 122 Back cover 13 Screw auger 131 Rotary shaft 132 Screw blade 14 Chute 141 Separator 15 Scraper 15A Scraper R groove

Claims (9)

[Claims] A traveling vehicle capable of traveling on the ground is provided with at least two earth-discharge plates, and these two earth-discharge plates are shaped like a triangle or a octagon toward the front in the traveling direction of the vehicle. And the bottom edge of each earth removal plate is supported so that it touches the ground or along the vicinity of the ground, and by running the traveling vehicle across the groove, both sides near the groove Alternatively, a groove backfilling device characterized in that earth and sand deposited on one side is moved along a soil removal plate to a groove and backfilled. 2. The vehicle travels forward in the traveling direction.
By supporting the two discharge plates expanded in the shape of a letter or an eight-letter so that their lower edges contact the ground or along the vicinity of the ground, and run the traveling vehicle across the groove A method for backfilling a groove, comprising moving earth and sand deposited on both sides or one side in the vicinity of the groove along the earth removal plate to the groove for backfilling. 3. The groove backfilling device according to claim 1, wherein the two earth discharging plates are formed so that a longitudinal section thereof is curved into a flat plate shape or a hollow shape. 4. The groove backfilling device according to claim 1, wherein each of the two earth removal plates is provided with one or a plurality of support rollers. 5. The apparatus according to claim 1, wherein the support roller is provided on each of the earth discharging plates via an elevating mechanism, and the distance between the lower edge of the earth discharging plate and the ground can be adjusted by the elevating mechanism. The groove backfill device according to claim 4. 6. A rotatable transport screw is provided along the front side of each of the two discharge plates, and the transport screw is rotated to forcibly remove the sediment deposited on both sides or one side near the groove. 2. The groove backfilling device according to claim 1, wherein the groove is backfilled. 7. A structure in which the two earth-discharge plates can be selectively arranged at a work position where a lower end edge contacts the ground or along the vicinity of the ground, and a storage position away from the ground. The groove backfilling device according to claim 1, wherein the groove is backfilled. 8. A work position in which the two earth-discharge plates are rotatable about a horizontal axis extending in a vehicle traveling direction, and each lower edge contacts the ground according to the inclination of the ground, or
2. The groove backfilling device according to claim 1, wherein the device is configured to rotate to a working position along the vicinity of the ground. 9. The traveling vehicle includes a substantially cylindrical or substantially semi-cylindrical support having at least a lower front portion opened, and a screw auger housed in the support with at least a lower front half exposed. Wherein the screw auger is provided with a groove excavator in which a rotary shaft is rotatably supported on the support and a scraping portion is provided on an outer peripheral edge of the screw blade. The device for backfilling grooves according to claim 1.