JPH09158246A - Method and device for supplying excavated earth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accomplish automation of pneumatic transport of clayey earth, etc., from excavation without resorting to human power by performing transportation upon cutting the earth into an appropriate size. SOLUTION: An excavation earth supplying device 10 is structured so that the earth from excavation is supplied to an air suction piping 24 when the earth is to be transported onto the ground. The device 10 is equipped with a screw conveyor to convey earth from excavation in a certain quantity bit by bit, a taper pipe 30 connected with the discharge port of the screw conveyor and compressing the earth gradually, and a crusiform cutter 32 which divides in four in discharging direction the earth discharged from the pipe 30 and makes it possible that the earth is cut by its own weight into a lump 40 greater than the bore of the suction piping, and is located below the discharge port of the pipe 30 and connected with the piping 24. The arrangement is further equipped with a supply hopper 34 having slopes 44a, 44b to guide the earth lumps dropped from the pipe 30 toward the pipe mouth 42 of the piping 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavated soil supply device and an excavated soil supply method, and more particularly, when the excavated soil in the ground is pneumatically conveyed to the ground by using an intake pipe, the excavated soil is drawn into the intake pipe. TECHNICAL FIELD The present invention relates to an excavated soil supply device and an excavated soil supply method for supplying to an excavated soil.

[0002]

2. Description of the Related Art Conventionally, generally, when carrying out an initial excavation by a shield construction method, the excavated soil is carried out without a space for installing a delivery facility such as a pressure pump as in the case of main excavation. Therefore, it relies on human power by using a belt conveyor and a bucket.

For example, when excavating the excavated soil using a bucket, a loading operator loads the excavated soil taken into the shield machine from the shield chamber by the screw conveyor and conveys the bucket to the bottom of the shaft. Under the shaft, the shaft worker transfers the excavated soil from the bucket to the portal crane, transports the excavated soil to the ground by the portal crane, and the loading worker transships the excavated soil from the portal crane to the dump truck on the ground. I try to carry it out.

When carrying out such excavated soil,
At least three workers are required, such as a bucket loading worker, a vertical shaft downloading worker to transfer to a portal crane, and a dumping truck loading to the dump truck on the ground. The time required to carry out the product will be long, the construction period will be long, and the inside of the mine will be dirty, resulting in poor scaffolding.

By the way, the applicant of the present invention has previously adopted, as a test construction, an air-conveying method using a vacuum for cleaning underground after primary lining in shield construction, so that solid matter such as backfill material can be easily carried out. I confirmed that I could do it.

Then, it was confirmed by the subsequent test construction that the above-mentioned air carrying method could be further developed to carry out heavy objects such as concrete debris on the underground wall.

This air carrying device, as shown in FIG.
Vacuum generator 1 on the ground via a filter device 100
The receiver tank 104 connected to the No. 02 is installed, and from this receiver tank 104 through the vertical shaft 106, the horizontal shaft 108
Up to this point, the intake pipe 110 is arranged, the supply device 112 is connected to the tip of the intake pipe 110, and the solid matter and the like are carried out from the screw conveyor 114 to the supply device 112.

As shown in FIG. 6, the supply device 112 supplies the solid material from the screw conveyor 114 to the slide plate 118 by the double agitator 116, and slides the solid material on the slide plate 118. Solid matter or the like is supplied to the pipe port of the intake pipe 110 by the rotation of the rotary blade 120, and water is jetted from the jet nozzle 124 using the water jet jet pump 122.

[0009] Then, by using such an air conveying device for carrying out the excavated soil at the time of initial excavation by the shield, an attempt was made to automate the excavated soil to be carried out. 112 is unsuitable for cohesive soil such as excavated soil of the earth pressure type shield construction method.

In order to convey the cohesive soil through the intake pipe 110, it is necessary to supply the excavated soil of an appropriate size to the intake pipe 110, and as shown in FIG. Is too small, intake pipe 110 and excavated soil 12
6 creates a gap between the intake pipe 110 and the inside of the intake pipe 110, which makes it difficult to convey the intake pipe 110. On the other hand, if it is too large, the viscosity of the excavated soil causes
The excavated soil is clogged in the intake pipe, which makes it impossible to carry it.

Therefore, as shown in FIG. 8, a connection pipe 128 is provided on the screw conveyor to take the excavated soil into the supply hopper 130, and the excavated soil has a size suitable for air conveyance in the supply hopper 130. When the soil mass was cut using a scoop and the water was supplied to the pipe opening of the intake pipe 110 connected to the supply hopper 130 by the hose 132, it was found that proper conveyance was possible.

However, in the case of such a method of supplying a clod, it is necessary to manually cut the clod, and at least one worker is required, and moreover, the labor for cutting the clod to an appropriate size is required. It is such a thing.

The present invention has been made in view of the above-mentioned problems, and the purpose thereof is to cut the excavated soil such as cohesive soil into an appropriate size without manual labor to achieve full automation of air transportation. An object of the present invention is to provide an excavated soil supply device and an excavated soil supply method.

[0014]

In order to achieve the above object, the invention according to claim 1 uses the intake air for excavating the excavated soil when the excavated soil under the ground is pneumatically conveyed to the ground using an intake pipe. The excavated soil supply device for supplying to the pipe, a screw conveyor for conveying the excavated soil by a predetermined amount at a time, and the excavated soil discharged from the screw conveyor provided on the discharge port side of the screw conveyor of the intake pipe. A cutting means capable of cutting into a clod larger than the caliber, and is connected to the suction pipe under the discharge port of the screw conveyor, and directs the clod that has dropped from the screw conveyor to the pipe port of the suction pipe. And a feed hopper having an inclined surface for guiding the guide.

According to the first aspect of the present invention, the excavated soil discharged from the screw conveyor is cut by the cutting means into a soil pipe having a diameter larger than that of the intake pipe, and the soil pipe is supplied into the supply hopper. By guiding the clod that has fallen from the screw conveyor toward the mouth of the intake pipe, it is possible to supply the clod of an appropriate size to the intake pipe without relying on human power, and it is highly viscous excavated soil. Also,
It is possible to reliably carry out air transfer, and it is possible to achieve complete automation of air transfer.

According to a second aspect of the present invention, in the first aspect, a tapered taper pipe for gradually compressing the discharged excavated soil is connected to the discharge port of the screw conveyor.

According to the second aspect of the invention, the excavated soil discharged from the screw conveyor in various sizes is gradually compressed by gradually compressing the excavated soil discharged by the taper pipe connected to the discharge port of the screw conveyor. Is compressed into a continuous state, and then cut to obtain an appropriately sized clod with no gaps in the soil, enabling reliable air transfer.

The third aspect of the present invention is the first or second aspect.
In the above, the cutting means is constituted by a cutter that cuts the excavated soil along the discharge direction so that the excavated soil can be cut into the soil blocks by its own weight.

According to the third aspect of the present invention, the excavated soil is cut along the discharge direction by the cutter, and the excavated soil is thinned, so that the discharged excavated soil is cut by its own weight at the time of dropping and is appropriate. It can be a large size of soil.
By cutting the discharged excavated soil with a cutter for each suitable amount of soil in the discharge direction to form a lump of soil, it is possible to reliably form a lump of soil with an appropriate amount of soil without relying on human power, and the air transfer is fully automated. It can be performed.

The invention described in claim 4 is the invention according to claim 1 or 2
In the above, the cutting means is constituted by a cutter that cuts the discharged excavated soil in the discharge direction for each appropriate amount of soil to form the soil mass.

According to the fourth aspect of the present invention, the discharged excavated soil is cut by the cutter in the discharge direction for each appropriate amount of soil to form the soil mass, thereby reliably forming the soil mass of the appropriate soil volume. It is possible to supply the air mass with this proper amount of soil to the intake pipe for reliable air transfer, and to completely automate the air transfer.

According to a fifth aspect of the present invention, in the fourth aspect, the receiving chute for receiving the discharged excavated soil is provided with a variable inclination angle, and the cutter cuts the excavated soil on the receiving chute. It has a feature.

According to the invention of claim 5, after receiving the excavated soil discharged from the receiving chute and cutting the excavated soil on the receiving chute, the solid mass cut by the inclination angle of the receiving chute is surely supplied. It can be dropped near the inlet of the intake pipe in the hopper and sucked into the intake pipe.

By adjusting the inclination angle of the receiving chute according to the soil quality of the excavated soil, it is possible to easily cope with the supply of excavated soil of various soil types.

The invention according to claim 6 is the invention according to claim 4 or 5.
In the above, it is characterized by having a sensor for detecting an appropriate amount of soil to be cut by the cutter.

According to the sixth aspect of the invention, when the discharged excavated soil is cut by the cutter for each suitable amount of soil in the discharging direction, the sensor detects the appropriate amount of soil to be cut by the cutter, A more appropriate amount of soil can be easily formed, and reliable air transfer can be performed.

According to a seventh aspect of the present invention, there is provided a method for supplying excavated soil to the intake pipe when the excavated soil in the ground is pneumatically conveyed to the ground by using the intake pipe. A step of conveying the excavated soil by a predetermined amount by a screw conveyor, a step of gradually compressing the excavated soil conveyed by the predetermined amount by a taper pipe, and cutting the compressed excavated soil along a discharge direction by a cutter. , A step of cutting each cut excavated soil by its own weight and dropping it as an earth mass larger than the diameter of the intake pipe, and rolling the falling earth mass on an inclined surface in the supply hopper to be connected to the supply hopper. And a step of guiding to the pipe opening of the intake pipe.

According to the seventh aspect of the invention, the excavated soil cut along the discharge direction by the cutter is cut by its own weight when dropped, and the dropped clod is rolled on the inclined surface in the supply hopper. By guiding the intake pipe to the mouth of the intake pipe, it is possible to supply the soil mass to the intake pipe in a completely automatic manner, and to reliably carry the air.

The invention as set forth in claim 8 is a method for supplying excavated soil to the intake pipe when the excavated soil in the ground is pneumatically conveyed to the ground by using the intake pipe. A step of conveying the excavated soil by a predetermined amount by a screw conveyor, a step of discharging the excavated soil conveyed by the predetermined amount on a receiving chute whose angle is adjusted to a predetermined inclination angle, and a step of discharging the excavating soil on the receiving chute. A step of detecting the proper amount of excavated soil with a sensor, and cutting the excavated soil in the discharge direction at the proper amount of soil position with a cutter to form a clod larger than the diameter of the intake pipe, and receiving this clod. It is characterized by including a step of dropping from the chute, and a step of rolling the fallen earth mass on an inclined surface in the supply hopper and guiding it to the pipe inlet of the intake pipe connected to the supply hopper. .

According to the invention described in claim 8, the sensor detects the proper amount of soil on the chute receiving the excavated soil conveyed by a predetermined amount, and the excavated soil is discharged in the discharging direction by the cutter at the appropriate amount of soil. By cutting and dropping the clod from the receiving chute onto the inclined surface in the supply hopper and guiding it to the inlet of the intake pipe, a more appropriate amount of clod can be supplied to the intake pipe completely automatically. It is possible to carry out various air conveyances.

In the excavated soil supply apparatus and the excavated soil supply method according to the ninth and tenth aspects of the present invention, the appropriate cross-sectional area is a size that can close the pipe inlet of the intake pipe, and the appropriate length is the intake air. It is characterized in that the frictional force in the pipe has a length that is not larger than the suction force acting on the soil mass.

According to the ninth and tenth aspects of the present invention, it is possible to reliably block the pipe mouth of the intake pipe by the falling clod, and to reliably apply suction force to the clod.
Since the soil mass sucked into the intake pipe is set to have a frictional force that does not become larger than the suction force, reliable suction conveyance can be performed.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 3 are views showing an excavated soil supply apparatus according to a first embodiment of the present invention.

This excavated soil supplying device 10 conveys the excavated soil to the ground when the excavated soil in the ground is pneumatically conveyed to the ground using the air conveying device 12 during the initial excavation of the earth pressure type shield construction method. It is designed to be supplied to.

The air carrying device 12 is, as shown in FIG.
The receiver tank 18 connected to the vacuum generator 16 via the filter device 14 is installed on the ground, and the intake pipe 24 is arranged in the side shaft 20 from the receiver tank 18 through the vertical shaft 20 to operate the vacuum generator 16. The intake pipe 24 is sucked in, the excavated soil is conveyed to the ground by the intake pipe 24, the excavated soil is conveyed to the inside of the receiver tank 18, and the excavated soil stored in the receiver tank 18 is placed on the dump truck 26. It is designed so that it can be loaded onto and taken out.

As shown in FIG. 1, the excavated soil supply device 10 is arranged at the tip of the intake pipe 24, and has a screw conveyor 28, a taper pipe 30, a cross cutter 32 as a cutting means, and a supply device. It is configured with a hopper 34.

The screw conveyor 28 has one end facing the shield chamber (not shown) and the other end located in the shield machine, and discharges the excavated soil in the shield chamber into the shield machine.

The taper pipe 30 is used for the screw conveyor 28.
Is connected to the discharge position and the tip thereof is arranged above the supply hopper 34.

The taper pipe 30 is formed in a tapered shape so as to gradually compress the excavated soil discharged from the screw conveyor 28.

The taper pipe 30 compresses the excavated soil of various sizes discharged from the screw conveyor 28 to eliminate the gap in the excavated soil and form a continuous continuous excavated soil. Becomes

The cross cutter 32 is arranged in the discharge port of the taper pipe 30 and cuts the excavated soil compressed by the taper pipe 30 along the discharge direction of the excavated soil.

As shown in FIG. 2, the cross cutter 32 has a ring portion 36 substantially corresponding to the inner diameter of the discharge port of the tapered tube 30, and a cross-shaped tooth portion 38 formed in the ring portion 36. And the tooth portion 38 is used to compress the excavated soil compressed by the tapered pipe 30 along the discharge direction.
It is divided into a piece of earth 40 having an appropriate cross-sectional area and length with respect to the inlet of the intake pipe 24, and is formed to have a thickness that can be cut and dropped by its own weight.

Here, the appropriate sectional area means the intake pipe 24.
The size that can close the pipe mouth of the above and an appropriate length is such that the frictional force in the intake pipe 24 does not become larger than the suction force that acts on the soil mass 40.

The supply hopper 34 is the screw conveyor 2
8 is located below the discharge port and is connected to the intake pipe 24 at the lower part thereof.

The tip of the intake pipe 24 is connected to the supply hopper 3
4 is inserted into the inside of the tube 4, and the tube opening 42 thereof is in a state of facing slightly upward.

Further, in the supply hopper 34, an inclined surface 44a for guiding the earth mass 40 dropped from the screw conveyor 28 (specifically, the discharge port of the taper pipe 30) toward the pipe port 42 of the intake pipe 24, 44b is formed.

One inclined surface 44a is the other inclined surface 44a.
The inclination angle is set to be larger than that of b, and the clod 40 from the taper pipe 30 is dropped onto the inclined surface 44a having a large inclination angle, and the clod 40 rolls on the inclined surface 44a to reach the pipe mouth 42 position. When it falls, it is guided by the other inclined surface 44b, and the earth mass 40 is surely guided into the pipe mouth 42 to close the pipe mouth 42.

It should be noted that the inclined surface 44a is filled with water by the hose 46 to improve the slippage of the clod 40 and reduce the frictional resistance in the intake pipe 24.

Next, a method for supplying excavated soil using the excavated soil supplying apparatus 10 will be described.

First, the excavated soil in the shield chamber is conveyed by the screw conveyor 28 into the shield machine in predetermined amounts.

In this case, the excavated soil carried out from the screw conveyor 28 has various sizes and is transported in a state where there is a gap in the excavated soil.

Next, the excavated soil conveyed by the predetermined amount from the screw conveyor 28 is gradually compressed by the taper pipe 30.

In this case, the compression of the tapered tube 30 causes
There will be no gaps in the excavated soil, and there will be a continuous state without breaks.

Then, it is compressed by the tapered tube 30,
The excavated soil in a continuous state without a gap is divided into four along the discharge direction by the cross cutter 32, and is discharged from the discharge port of the taper pipe 30.

In this case, the excavated soil discharged from the discharge port of the taper pipe 30 becomes a mass 40 having an appropriate cross-sectional area and length with respect to the diameter of the intake pipe 24, and has a fineness to be cut by its own weight. Therefore, the pipe opening of the intake pipe 24 can be closed and dropped into the supply hopper 34 as a soil mass 40 that can be sucked.

Next, the clod 4 that has fallen into the supply hopper 34.
0 rolls on one inclined surface 44a in the supply hopper 34 and is guided to the lower part of the inclined surface 44a, where it is guided to the pipe port 42 of the intake pipe 24 by the other inclined surface 44b, The mouth 42 is closed and the air is sucked into the intake pipe 24.

In this case, water is poured onto the one inclined surface 44a by the hose 46, and the water is poured into
The slip of 0 is improved and the clods 4 in the intake pipe 24 are
The friction of 0 is reduced so that the clod 40 can smoothly pass through the intake pipe 24. Therefore, even if the soil mass 40 has a high viscosity, it can be reliably transported in the intake pipe 24 by pouring a little more water than the sandy soil.

Further, the soil mass 4 supplied into the intake pipe 24
Since 0 is formed in an appropriate amount of soil and has no gap inside, it can be reliably conveyed without being clogged or being unable to suck and convey due to a gap, It can be fully automated even for air transportation of soil, and is particularly well suited for excavating soil during initial excavation, where there is no space to install discharge equipment such as a pressure pump as during main excavation. be able to.

FIG. 4 is a diagram showing an excavated soil supply device according to a second embodiment of the present invention.

The excavated soil supply device 50 includes a screw conveyor 28, a receiving chute 52, and an ultrasonic sensor 54.
And a cutter 56 as a cutting means and a supply hopper 58.

The screw conveyor 28 carries out the excavated soil in the shield chamber into the shield machine, as in the first embodiment.

The receiving chute 52 is arranged between the discharge port of the screw conveyor 28 and the supply hopper 58, receives the excavated soil from the screw conveyor 28 and supplies it to the inside of the supply hopper 58. The inclination angle is variable on the hopper 58.

That is, the receiving chute 52 is rotatably attached to the upper surface of the supply hopper 58 through a hinge 60 in a substantially central position on the lower surface thereof, and is rotatably mounted on the upper surface of the supply hopper 58 on the screw conveyor 28 side and the supply hopper 58. A receiving chute jack 62 is attached between the receiving chute jack 62 and the side surface of the hinge, and the tilt angle is variable in the vertical direction about the hinge 60 by driving the receiving chute jack 62.

The inclination angle of the receiving chute 52 can be set small for sandy soil and large for cohesive soil according to the soil quality of the excavated soil so that the excavated soil can be reliably supplied to the supply hopper 58. . In addition, this inclination angle is set to such an extent that the subsequent soil mass 40 can fall after a while. Although the excavated soil is directly supplied to the receiving chute 52 from the screw conveyor 28,
Similar to the first embodiment, the screw conveyor 2
The excavated soil may be gradually compressed by connecting the taper pipe 30 to the discharge port of 8.

The ultrasonic sensor 54 is arranged above the tip side of the receiving chute 52, and detects the proper amount of excavated soil supplied from the screw conveyor 28 onto the receiving chute 52.

The cutter 56 is disposed above the receiving chute 52 closer to the screw conveyor 28 than the ultrasonic sensor 54, and can be moved forward and backward with respect to the upper surface of the receiving chute 52 by the excavated soil cutting jack 64.

Then, the ultrasonic sensor 54 detects an appropriate amount of excavated soil on the receiving chute 52 and operates the excavated soil cutting jack 64, so that the cutter 56 discharges the excavated soil for each appropriate amount of soil. The soil mass 40 having a proper cross-sectional area and length with respect to the diameter of the suction tube 24 is formed by cutting.

The lower part of the supply hopper 58 is connected to the intake pipe 24, and the pipe port 42 of the intake pipe 24 is connected to the supply hopper 58.
An inclined surface 66 that is located near the center of the tube and is inclined with respect to the tube opening 42 is formed inside.

Then, the hose 4 is guided while guiding on the inclined surface 66 the clod 40 having an appropriate amount of soil which has fallen from the receiving chute 52.
6 to inject the soil mass 40 to the pipe mouth 42,
Is closed and suction is performed through the intake pipe 24.

Next, a method for supplying excavated soil using the excavated soil supply device 50 will be described.

First, the screw conveyor 28 conveys the excavated soil in the shield chamber into the shield machine by a predetermined amount.

Next, the excavated soil conveyed by the screw conveyor 28 is supplied onto the receiving chute 52 from the discharge port of the screw conveyor 28.

In this case, the receiving chute 52 is angle-adjusted according to the soil quality of the excavated soil by actuating the receiving chute jack 62 so that the excavated soil can surely slide and fall.

Next, the ultrasonic sensor 54 detects an appropriate amount of excavated soil discharged onto the receiving chute 52, and the ultrasonic sensor 54 sends a signal to the excavated soil cutting jack 64.

In this case, the appropriate amount of soil is the amount of soil that can obtain the soil mass 40 having an appropriate cross-sectional area and length with respect to the diameter of the intake pipe 24.

Next, in response to the signal from the ultrasonic sensor 54, the receiving chute jack 62 is operated, the cutter 56 is slid toward the upper surface of the receiving chute 52, and the excavated soil on the receiving chute 52 is adjusted to an appropriate amount. By cutting at the position and dividing in the discharge direction, the clod 40 having an appropriate amount of soil larger than the diameter of the intake pipe 24 is formed.

The earth mass 40 cut by this cutter 56
Due to the inclination of the receiving chute 52,
2 slides down and falls from the receiving chute 52 into the supply hopper 58.

Next, the clod 40 that has fallen from the receiving chute 52 passes over the sloped surface 66 of the supply hopper 58 and the hose 4.
The water will be tumbled while receiving water injection from No. 6 and supplied to the pipe port 42 of the intake pipe 24 to reliably close the pipe port 42 and be sucked into the intake pipe 24. Further, the clod 40 sucked into the intake pipe 24 has a length such that the frictional force in the suction pipe 24 does not become larger than the suction force acting on the clod 40, so that the clod 40 is reliably sucked and conveyed. .

As described above, the soil mass 40 having an appropriate amount of soil can be supplied to the intake pipe 24 completely automatically, and it can be applied to highly viscous excavated soil. It enables air transportation by fully automatic operation.

The present invention is not limited to the above-mentioned embodiments, but can be modified into various forms within the scope of the gist of the present invention.

For example, the above-mentioned earth pressure type shield construction method is not limited to carrying out excavated soil at the time of initial excavation, but also initial excavation of small and medium diameter shield work, pre-excavation of propulsion work, vertical shaft excavation at a depth of about 30 m, or machinery. It can also be used to carry out excavated soil when excavating in a narrow place where it cannot be carried in.

Further, in the first embodiment, the case where the cross cutter is used as the cutting means and the excavated soil is divided into four along the discharge direction has been described, but the present invention is not limited to this example, and the excavated soil is discharged in the discharge direction. It is also possible to use a cutter that divides into two or three along the line.

Further, in the second embodiment, the ultrasonic sensor is used as the sensor for detecting the proper soil amount, but the present invention is not limited to this example, and various sensors may be used as long as they can detect the proper soil amount. It is also possible to use.

Further, in the second embodiment, the case where the cutter is operated by using the excavated soil cutting jack has been described, but the present invention is not limited to this example, and the cutter is operated by various driving means such as a rotary cutter. It is also possible to activate.

[0086]

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view showing a main part of an excavated soil supply device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an overall schematic diagram of an excavated soil supply system according to a first embodiment.

FIG. 4 is an enlarged cross-sectional view showing a main part of an excavated soil supply system according to a second embodiment of the present invention.

FIG. 5 is an overall schematic view of background art showing a state where an air carrying device is used for shield work.

6 is a cross-sectional view showing details of the supply device of FIG.

FIG. 7 is a cross-sectional view showing a state in which an earth mass smaller than that of the intake pipe is conveyed by the intake pipe of FIGS. 5 and 6.

FIG. 8 is a cross-sectional view showing an improved example of the supply device of FIGS. 5 to 7.

[Explanation of symbols]

 10, 50 Excavation soil supply device 12 Air transfer device 24 Intake pipe 28 Screw conveyor 30 Tapered pipe 32 Cross cutter 34, 58 Supply hopper 40 Clod mass 42 Pipe mouth 44a, 44b, 66 Inclined surface 52 Receiving chute 54 Ultrasonic sensor 56 cutter

Front Page Continuation (72) Inventor Tsutomu Umehara 1-17-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Tsukasa Hashimoto 1-1-7 Kyobashi, Chuo-ku, Tokyo Toda Construction Stock In-house (72) Inventor Tadashi Higuchi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.

Claims (10)

[Claims] 1. A digging soil supply device for supplying the digging soil to the intake pipe when the digging soil in the ground is pneumatically conveyed to the ground by using an intake pipe, wherein the digging soil is supplied in a predetermined amount. A screw conveyor to be conveyed, and provided on the discharge port side of the screw conveyor, and enables excavated soil discharged from the screw conveyor to be cut into a lump having an appropriate cross-sectional area and length with respect to the diameter of the intake pipe. A cutting means, a supply hopper that is connected to the intake pipe below the discharge port of the screw conveyor, and that has an inclined surface that guides the soil mass that has dropped from the screw conveyor toward the pipe port of the intake pipe; An excavated soil supply device comprising: 2. The excavated soil supply device according to claim 1, wherein a tapered tapered pipe for gradually compressing discharged excavated soil is connected to a discharge port of the screw conveyor. 3. The cutting means according to claim 1, wherein the cutting means has a size such that the excavated soil is cut and dropped by its own weight, and is configured by a cutter that cuts the excavated soil along the discharge direction. An excavated soil supply device characterized by. 4. The excavated soil supply device according to claim 1, wherein the cutting unit is configured by a cutter that cuts the discharged excavated soil in a discharge direction to form the soil mass. 5. The excavated soil supply according to claim 4, wherein a receiving chute for receiving the discharged excavated soil is provided with a variable inclination angle, and the cutter cuts the excavated soil on the receiving chute. apparatus. 6. The excavated soil supply device according to claim 4, further comprising a sensor for detecting an appropriate amount of excavated soil to be cut by the cutter. 7. A method for supplying excavated soil to the intake pipe when the excavated soil in the ground is pneumatically conveyed to the ground using an intake pipe, the excavated soil being supplied by a screw conveyor. A step of conveying a predetermined amount at a time, a step of gradually compressing the excavated soil conveyed at a predetermined amount by a taper pipe, a step of cutting the compressed excavated soil along a discharge direction with a cutter, and a diameter of the intake pipe A step of dropping as an earth mass having an appropriate cross-sectional area and a length, and rolling the dropped earth mass on an inclined surface in the supply hopper to guide it to the pipe inlet of the intake pipe connected to the supply hopper. A method of supplying excavated soil, comprising: 8. A method for supplying excavated soil to the intake pipe when the excavated soil in the ground is pneumatically conveyed to the ground using an intake pipe, the excavated soil being supplied by a screw conveyor. A step of transporting each predetermined amount, a step of discharging the excavated soil transported by each predetermined amount onto a receiving chute whose angle is adjusted to a predetermined inclination angle, and an appropriate amount of excavated soil discharged onto the receiving chute. And a step of detecting with a sensor, the excavated soil is cut in the discharge direction by a cutter at the proper soil amount position to form a soil mass having an appropriate cross-sectional area and length with respect to the diameter of the intake pipe. A step of dropping the falling earth mass from the receiving chute, and a step of rolling the fallen earth mass on an inclined surface in a supply hopper to guide it to a pipe port of the intake pipe connected to the supply hopper. Characterizing Excavation soil supply method. 9. The appropriate cross-sectional area according to claim 1, wherein the appropriate cross-sectional area is a size capable of closing a pipe opening of the intake pipe, and the appropriate length is a frictional force in the intake pipe that acts on the clod. An excavated soil supply device characterized in that the length is not larger than the suction force. 10. The appropriate cross-sectional area according to claim 7 or 8, wherein the appropriate cross-sectional area is a size capable of closing a pipe opening of the intake pipe, and the appropriate length is a frictional force in the intake pipe that acts on the clod. A method for supplying excavated soil, characterized in that the length is not greater than the suction force.