JP2002227172A - Culvert forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a culvert forming device capable of constructing a culvert in a rice field without making a U-turn even if a rice field path exists. SOLUTION: This culvert forming device is provided with an earth cutting shank 11 fixed to a fixing device 22, which is provided in a traveling device 2 such as a bulldozer, freely to be removed and a shell-like culvert boring tool 12 provided at a lower end of the earth cutting shank 11, and the traveling device 2 pulls the earth cutting shank 11 in the horizontal direction to form a culvert 31 under the ground. The fixing device 22 is provided in a front part and a rear part of the traveling device 2. The culvert forming device works in the condition that the earth cutting shank 11 is fixed to the rear part of the traveling device 2 till the traveling device reaches the rice field path 32, and in this side of the rice field path 32, the earth cutting shank 11 is separated from the traveling device 2, and the traveling device 2 is operated to linearly back, and the earth cutting shank 11 is connected to the fixing device 22 of the front part of the traveling device 2. The traveling device 2 is moved forward to construct the culvert to the rice field path.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a drainage culvert in a wetland such as a wetland.

[0002]

2. Description of the Related Art In order to improve drainage of wetlands such as wetlands, an underdrain is formed underground using a drainage underdrain forming apparatus. The drainage culvert formation device is composed of a burrow shank held vertically and a shell-shaped culvert drill provided at the lower end of the burrow shank, and is used by being attached to the rear of a bulldozer or tractor, etc. A bulldozer or the like is advanced in a state where the lower half of the shaving shank is protruded into the ground with the piercing tool downward, and the shaving shank or the like is horizontally pulled to form a drainage culvert in the ground.

In some cases, a porous water-absorbing pipe is laid in a culvert formed by advancing a shell-shaped culvert drill.
In this case, the tip of the porous water absorption pipe is connected to the rear part of the underdrain pier, and the porous water suction pipe is drawn into the underdrain from the porous water suction pipe supply device arranged at the underdrain formation start point and laid by the advance of the underdrain formation device. Method, plastic sheet is buried in a culvert while forming a circular shape with a molding machine, filling a hydrophobic material such as rice husk while forming a culvert, laying a water absorption pipe while piercing the culvert and filling with a hydrophobic material There is a method to do.

As an apparatus used for such drainage culvert formation work, there is a drainage culvert formation apparatus disclosed in Japanese Patent Application Laid-Open No. 56-156310. By using this drainage culvert forming apparatus, it is possible to lay a water absorption pipe while forming a drainage culvert in the soil, and to fill a gap between the drainage culvert and the water absorption pipe with a hydrophobic material.

In this conventional drainage culvert forming apparatus, rice hulls to be filled into the drainage culvert as a hydrophobic material are accommodated in a hopper, and are sequentially fed out from the hopper by an unreeling device as the drainage culvert forming operation proceeds, and a predetermined transport is performed. Since it is merely dropped into the drainage culvert via the path, the supply of the rice husks into the drainage culvert is not continuously performed, and the rice husk may be clogged or interrupted in the middle of the transport path. For this reason, rice husks are not sufficiently filled in the drainage culvert, and uneven filling or cavities may occur.

[0006] If the rice husks are not completely filled in the drainage culvert as described above, the function of the drainage culvert decreases, and the intended drainage effect cannot be obtained.

In order to solve such a problem, the present applicant firstly used a traction shank held vertically and a shell-shaped culvert drill provided at the lower end of the shank. In a device for forming a drainage culvert in the ground by pulling in the horizontal direction, and filling the drainage culvert with a hydrophobic material fed through a hydrophobic material transport path provided in a burring shank and a culvert drilling tool. Devised and applied for a drainage culvert forming device having a configuration in which a gas flow generator for generating a gas flow by injecting high pressure gas supplied from a high pressure gas generator into a tubular body and communicating with a hydrophobic material conveying path was used. Request 2000-3
No. 69130). According to this device, it is possible to provide a drainage culvert forming device capable of smoothly and reliably filling a drainage culvert formed in the soil with a hydrophobic material.

[0008]

However, in these conventional drainage culvert forming apparatuses, a shaving shank is provided only at the rear portion of the traveling device. Therefore, when forming a drainage culvert in a field where there is a drainage road, the traveling device cannot climb over the road and run, so the traveling device disconnects the shank shank from the traveling device in front of the drainage road and makes the traveling device U-turn. The shank was connected to the rear part of the building, and the construction was carried out with the running device backed.

[0009] When such a construction method is performed, there are the following problems. (1) Since it is necessary to make the traveling device make a U-turn, it takes a long time for the operation, and the operation efficiency is poor. (2) U-turn may be difficult in a narrow place. (3) When making a U-turn, it is difficult to position the traveling device for connecting the earth shank.

The problem to be solved by the present invention is
It is an object of the present invention to provide a drainage culvert forming apparatus capable of constructing a drainage culvert in a field without making a U-turn even when there is a bank road.

[0011]

According to the present invention, there is provided a drainage culvert forming apparatus according to the present invention, comprising: a shaving shank detachably fixed to a fixing device provided on a traveling device;
A shell-shaped culvert drill provided at the lower end of the shanks, and a culvert formation device for forming the culvert in the ground by horizontally pulling the shanks with the traveling device. A fixing device is provided at a front part and a rear part of the traveling device.

[0012] In the drainage culvert forming apparatus having such a configuration, the fixing device for the shank is provided at the front and rear portions of the traveling device, so that the shank is fixed to the rear portion of the traveling device up to the front of the road. After the cutting shank is separated from the traveling device in front of the road, the traveling device is linearly backed, the diving shank is combined at the front of the traveling device, and the traveling device is advanced from there. It is built up to the road by the thing.

In this drainage culvert forming apparatus, the drainage culvert is provided with means for laying a water absorption pipe in the drainage culvert at the same time as the formation of the drainage culvert by the traveling of the traveling device, thereby effectively draining the water outside the field. Simultaneous construction of water absorption pipes.

[0014] Further, the hydrophobic material supplied from the traveling device is supplied to the drainage culvert (an intake pipe is laid in the drainage culvert) via the soil shank and the hydrophobic material conveying path provided in the culvert pier. In such a case, a means for filling the inside of the drainage culvert and the outside of the water suction pipe) is provided to smoothly supply the hydrophobic material into the drainage culvert.

[0015]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. 1 is a side view showing a use state of a drainage culvert forming apparatus according to an embodiment of the present invention, FIG. 2 is a rear view of the drainage culvert forming apparatus shown in FIG. 1, and FIG. 3 is a sectional view of the formed drainage culvert. 4 is an enlarged view of a shank portion in the present embodiment, (a) is a side view,
(B) is a front view, (c) is a plan view, (d) is a BB cross-sectional view in (a) view, and (e) is a CC in (a) view.
FIG. 5 is an enlarged view of the clamp in this embodiment, in which FIG. 5A is a side view, FIG. 5B is a plan view, FIG. 5C is a front view, and FIG. It is sectional drawing.

[0016] The drainage culvert forming apparatus 1R and 1 of the present embodiment.
F is a bulldozer 2 having caterpillars 3 on both sides as a traveling vehicle, and is used by being attached before and after the bulldozer 2. FIG. 1 shows a state of being attached to the rear part. In the state shown in FIG. 1, the drainage culvert forming device 1 </ b> R includes a vertical shank 11 and a shell-shaped culvert drill 12 provided at the lower end of the vertical shank 11.
A conveying path 13 for a hydrophobic material provided in a shaving shank 11 and a culvert drill 12, a high-pressure air generator 14, a hopper 16 for accommodating a rice hull 15 as a hydrophobic material, and a hopper 1
6 and a gas flow generator 17 disposed in communication between the discharge port 6 and the transport path 13, and an air supply pipe 18 for supplying high-pressure air from the high-pressure air generator 14 to the gas flow generator 17 is provided. Is provided.

At the bottom of the hopper 16, there are arranged a stirring blade 19 for sending the rice husk 15 toward a gas flow generator 17 connected to a discharge port, and a motor 20 for rotating the stirring blade. As shown in FIG. 4, the tail shank 11 is provided on both sides with horizontal tail fin-like members 21.

The shaving shank 11 is attached to a fixing device 22 by
It is gripped by a clamp 24 that is opened and closed by a cylinder 23. The base of the clamp 24 is rotatably fixed to a fixing plate 22 a of the fixing device 22 by a shaft 25, and the middle of the clamp 24 is fixed to a pin 26 attached to the rod end of a cylinder 23. The tip hook portion 24a of the clamp 24 has a flange 11a so that the flange 11a on the top of the shank 11 and the fixing plate 22a are in close contact with each other.
Hold the lower surface of a. In FIG. 4A, the left clamp 24 shown by a solid line shows a state in which the flange 11a is gripped, and the right clamp 24 shown by a solid line shows a state in which the cylinder 23 is contracted to open the flange 11a. 27 in the figure
Is a packing provided to prevent air leakage from the transport path 13 of the hydrophobic material when the shank 11 is gripped.

The fixing device 22 and the body of the bulldozer 2
They are connected by a parallel link 28 and are driven up and down by a lifting cylinder 29.

The fixing device 22 having the above configuration is also provided at the front portion of the bulldozer 2, but the hopper 16 is provided only at the rear portion. It is supplied to the transport path. The supply of the rice husks to the front and rear fixing devices 22 can be switched by operating a switching valve.

Next, a method for constructing a drainage culvert using the apparatus according to the embodiment of the present invention will be described. First, as shown in FIG.
The shaving shank 1 is attached to the fixing device 22 at the rear of the bulldozer 2.
1, the culvert drill 12 is turned down, the lower half of the shank 11 is pushed up to the ground 30, and the bulldozer 2 is advanced to form a drainage culvert 31 in the ground 30. At the same time, the rice husk 15 fed from the hopper 16 via the gas flow generator 17 and the transport path 13 is filled into the drainage culvert 31. FIG. 3 is a sectional view of a portion of the formed drainage culvert 31.

This operation is performed up to the front of the road, and when the bulldozer 2 comes to a position where it cannot advance any further (it may be at an earlier position), as shown in FIG. 6 (a), the clamp 24 of the rear fixing device 22 is used. And remove the shank 1
The bulldozer 2 is backed straight up while leaving 1 in the ground, and the shaving shank 1 is placed below the front fixing device 22.
When the bulldozer 2 is stopped at the position where the heads of the bulldozer 1 coincide,
As shown in (b), the fixing device 22 is lowered and the shank 11 is clamped and fixed. Then bulldozer 2
Is advanced, the work by the shaving shank 11 is continued, and as shown in FIG. 6C, the drainage culvert 31 can be formed up to the work groove 33 in front of the road 32.

Next, another construction method using the bulldozer 2 provided with the drainage culvert forming apparatus 1R, 1F of the present invention will be described with reference to FIG. 7A is a side view showing the construction method, FIG. 7B is an enlarged view of a main part, and FIG. 7C is an enlarged sectional view of a drainage culvert.

In this construction method, a connecting member 40 is provided behind the bullet-shaped underdrain piercing tool 12, and the drainage underdrain 3
Water supply pipe feeder 4 arranged near the formation start end 31S
The tip of the water-absorbing pipe 42 drawn out of 1 is a connection aid 43
Through the connecting member 40.

Therefore, the earth shank 11 is moved forward to lay the water suction pipe 42 in the drainage culvert 31 formed by the culvert drilling tool 12 while drawing the gas flow generator 17 (not shown) and the transport path 13. The rice hull 15 fed via the space can be filled in the gap between the water suction pipe 42 and the drainage culvert 31.

Also in this construction method, when the bulldozer 2 reaches the front of the road, the shank 11 is removed from the fixing device 22 of the rear drainage culvert forming device 1R, the bulldozer 2 is backed, and the front drainage culvert device is removed. By fixing the earth shank 11 to the fixing device 22 on the first floor and moving the bulldozer 2 forward, the drainage culvert 31 can be excavated up to the work groove 33 on the hill.

[0027]

According to the present invention, the following effects can be obtained. (1) By installing the fixing device for the shaving shank at the front and rear of the traveling vehicle, the shaving shank attached to the rear portion is cut off, and then the running device is linearly backed and the soil at the front is removed. By fixing the earth shank by the cutting shank fixing device and moving the traveling device forward, it is possible to construct a drainage culvert up to the drainage road. (2) Since it is only necessary to back up the traveling device in a straight line without making a U-turn, construction can be performed in a short time, and construction in a narrow place can be easily performed. (3) Since the traveling device is simply backed straight, the positioning of the shaving shank and the fixing device can be easily performed, thereby improving work efficiency. (4) The work of laying a water absorption pipe in a drainage culvert while forming a drainage culvert in the ground by pulling a shell-shaped culvert pier can also be performed smoothly and reliably.

[Brief description of the drawings]

FIG. 1 is a side view showing a use state of a drainage culvert forming apparatus according to an embodiment of the present invention.

FIG. 2 is a rear view of the drainage culvert forming apparatus shown in FIG.

FIG. 3 is a cross-sectional view of the formed drainage culvert.

4A and 4B are enlarged views of a shank portion in this embodiment, where FIG. 4A is a side view, FIG. 4B is a front view, FIG. 4C is a plan view, and FIG. B sectional view,
(E) is a CC sectional view in the (a) view.

FIG. 5 is an enlarged view of a clamp according to the embodiment;
(A) is a side view, (b) is a plan view, (c) is a front view,
(D) is an AA sectional view of (a).

FIG. 6 is a process chart showing a construction method according to the present invention.

7A and 7B show another construction method using the traveling device provided with the drainage culvert forming apparatus of the present invention, wherein FIG. 7A is a side view showing the construction method, FIG. 7B is an enlarged view of a main part, and FIG. Is an enlarged sectional view of a drainage culvert.

[Explanation of symbols]

 Reference Signs List 1F Front drainage culvert formation device 1R Rear drainage culvert formation device 2 Bulldozer (traveling device) 3 Caterpillar 11 Shear shank 11a Flange part 12 Underdrain pier 13 Tooling path 14 High pressure air generator 15 Rice husk (hydrophobic material) 16 Hopper 17 Gas Flow generator 18 Air supply pipe 19 Stirrer blade 20 Motor 21 Earth closing member 22 Fixing device 22a Fixing plate 23 Cylinder 24 Clamp 24a Hook portion 25 Shaft 26 Pin 27 Packing 28 Parallel link 29 Elevating cylinder 30 Ground 31 Drainage culvert 31S 33 working groove 40 connecting member 41 water-absorbing pipe feeder 42 water-absorbing pipe 43 connecting aid

Claims (3)

[Claims] 1. A shaving shank detachably fixed to a fixing device provided on a traveling device, and a shell-shaped underdrain drilling tool provided at a lower end of the shaving shank. A drainage culvert forming apparatus for forming a drainage culvert in the ground by pulling a shaving shank in a horizontal direction, wherein the fixing device is installed at a front portion and a rear portion of the traveling device. 2. The drainage culvert forming device according to claim 1, wherein the underdrain pier has a means for laying a water absorption pipe in the drainage culvert simultaneously with the formation of the drainage culvert by running of the traveling device. 3. The method according to claim 1, wherein the hydrophobic material supplied from the traveling device is
3. The drainage culvert forming apparatus according to claim 1, further comprising means for filling the drainage culvert through a hydrophobic material transporting path provided in the burrow shank and the culvert drilling tool.