JPH08135375A - Tunnel excavator for base rock - Google Patents

Abstract

PURPOSE: To carry out the excavation even in the condition of a large spring water amount, by forming a suction part of a spring water at the lower side between the front side of a cutter head support and the rear side of a cutter head, and connecting the suction side of a pump for water exhaust to the above suction part. CONSTITUTION: At the lower side of a cutter head support 20, a water exhaust pump 33 which consists of an underwater pump is installed, and the suction part 34 of the water exhaust pump 33 is opposed to the rear side of a cutter head 21. By sucking the spring water from the lower side between the front side of the cutter head support 20 and the rear side of the cutter head 21, the stored spring water is sucked by the pump 33 for water exhaust and exhausted, when the spring water amount is large, and the spring water flows in the cutter head 21 and it is stored between the front side of the cutter head support 20 and the rear side of the cutter head 21. Consequently, the excavator is made possible to propell even in the condition of a large spring water amount, by preventing the overflow of the spring water from the opening 28 of the cutter head support 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock excavator for a rock mass used for excavating a rock mass in a mountain tunnel or in an urban area. Even when a large amount of water is spouted from the inner wall of a tunnel near a face, the rock mass is excavated. It enables digging without stopping the machine.

[0002]

2. Description of the Related Art As a rock excavator for rock mass, for example, one disclosed in Japanese Patent Laid-Open No. 4-194298 is known. That is, as shown in FIG. 1, a cutter head 2 is rotatably provided on a cutter head support 1, the cutter head 2 is rotationally driven by an electric motor 3 to excavate the ground, and the excavated earth and sand is excavated in a hopper chute 4. The main frame 6 provided on the cutter head support 1 is designed to be conveyed to the rear by the earth and sand conveying means 5 such as a belt.
The gripper frame 7 is slidable back and forth by a slide cylinder 8 along with, and a rear gripper (not shown) provided on the gripper frame 7 and a front gripper (not shown) provided on the cutter head support 1 are alternately pressed against the tunnel inner wall A. The slide cylinder 8 advances the cutter head support 1 and the gripper frame 7, and an outer shield 9 is provided on the upper part of the cutter head support 1, and an inner shield 10 is provided on the upper part of the gripper frame 7. It is installed so as to overlap with the bottom surface of the rock tunnel excavator.

The rock tunnel excavator shown in FIG. 1 is called a full shield type because it has an outer shield 9 and an inner shield 10. It is equipped with the outer shield 9 and the inner shield 10 described above. A rock tunnel excavator called an open type is also known.

[0004] When excavating a mountain tunnel or a rock layer in an urban area with such a rock tunnel excavator, the spring water from the ground near the face A ₁ of the tunnel inner wall A is the tunnel inner wall A.
Since it flows to the gripper frame 7 side from the gap between the cutter head support 1 and the cutter head support 1, conventionally, a drainage pump is installed near the rear of the gripper frame 7 to drain the above-mentioned spring water to the outside of the tunnel.

[0005]

When the amount of spring water from the ground near the cutting edge B is small, it can be sufficiently drained by the drainage pump as described above, but it flows from the gap between the tunnel inner wall A and the cutter head support 1. When the flow rate is small and the above-mentioned amount of spring water is large, the amount of spring water is larger than the flow rate flowing from the gap, the spring water accumulates in the front part of the cutter head support 1, and the rear part (gripper) from the opening 11 of the cutter head support 1. It flows to the frame 7 side).

For this reason, spring water flows in the portion between the cutter head support 1 and the gripper frame 7 (hereinafter referred to as the inside of the tunnel excavator main body), which may cause insulation failure of electric equipment or support work assembly. It becomes difficult to continue the excavation work and excavation, and the rock tunnel excavator will be stopped when the spring water is large.

[0007] Therefore, an object of the present invention is to provide a rock tunnel excavator capable of excavating without stopping even when the amount of spring water is large.

[0008]

A first aspect of the present invention is to provide a spring water suction portion 34 at a lower portion between a front portion of a cutter head support 20 and a rear portion of the cutter head 21, and the suction portion 34 for drainage. It is a rock excavation machine for the rock, in which the suction side of the pump 33 is connected. A second aspect of the present invention is a rock tunnel excavator provided with foreign matter mixture prevention means 70 that allows the passage of spring water but does not allow foreign matter to pass through at the spring water suction side portion of the suction portion 34. Third
In the invention, the foreign matter mixing prevention means 70 is provided by a large number of small-diameter inflow holes 69 through which the spring water passes but the foreign matter does not pass through, and a clogging prevention means 73 for preventing the foreign matter from clogging the large number of inflow holes 69 is provided. It is a rock tunnel excavator. Fourth
In the invention, a suction chamber 34 is formed by forming an inflow chamber facing the rear portion of the cutter head 21 in the lower part of the cutter head support 20, and a large number of inflow holes 69 are formed in the inflow side wall of this inflow chamber to prevent foreign matter from entering. Means 70, a gate plate 71 movably provided at a front portion of the inflow side wall at a position where the inflow hole 69 is closed and a position where the inflow hole 69 is opened, and an inflow side wall attached to the rear part of the cutter head 21. Back scraper 90 that scrapes off the soil and dirt accumulated near the front of the hopper and drops it on the hopper chute 26, the inflow hole 69.
The rock tunnel excavator is provided with the clogging prevention means 73 by using any one of the sprinkling pipes for injecting the cleaning liquid into the above or a combination thereof. 5th invention, the said suction part 3
4 is a rock tunnel excavator provided with a cleaning means for injecting a cleaning liquid into the inside of No. 4 and stirring and cleaning the foreign matters accumulated in the suction part 34. A sixth aspect of the invention is that the water level near the face in the tunnel excavator for rock mass is the opening 2 of the cutter head support 20.
A water level sensor 110 for detecting a water level at which the drainage pump 33 is slightly lower than the lower height of 7 and capable of continuous operation, and a controller 111 for outputting a drive signal and a stop signal to the drainage pump 33 by the water level detection signal of the water level sensor 110. It is a rock tunnel excavator provided.

[0009]

[Operation] According to the first invention, the spring water is sucked from the lower portion between the front portion of the cutter head support 20 and the rear portion of the cutter head 21, so that the spring water amount is large and the spring water is When it flows inside and accumulates between the front part of the cutter head support 20 and the rear part of the cutter head 21,
Since the collected spring water is sucked and drained by the drainage pump 33, the spring water does not overflow from the opening 28 of the cutter head support 20 and can be dug even when the amount of spring water is large. According to the second invention, the suction portion 3
No foreign matter is mixed in 4, so the drainage pump 33
Does not malfunction due to foreign matter. According to the third aspect, foreign matter is not clogged in the inflow hole 69 and the drainage pump 33 cannot suck the spring water, so that the drainage pump 33 can drain the spring water for a long time. Fourth
According to the invention, the rock scraps do not reach the inflow holes 69 by closing the inflow holes 69 with the gate plate 71, and the rock scraps accumulated on the front part of the inflow holes 69 are scraped and conveyed by the back scraper 90. Can be transported by means 27,
Since the cleaning liquid can be sprayed into the inflow hole 69 with the water sprinkling pipe, it is possible to prevent the inflow hole 69 from being clogged with small pieces of rock chips or small stones. According to the fifth invention, foreign matters such as rock chips accumulated in the suction portion 34 can be removed by stirring and washing, so that when the drainage pump 33 is driven after a long period of rest and during the drainage pump 33 is being driven. By agitating and removing foreign matters such as rock chips accumulated in the suction portion 34, the spring water is smoothly circulated in the suction portion 34 and can be reliably drained by the drainage pump 33. According to the sixth invention, when the water level of the spring water accumulated in the front part of the cutter head support 20 becomes close to the height of the lower part of the opening 28 of the cutter head support 20, the drainage pump 33 automatically drives the spring water. Since the water is drained, the spring water does not overflow from the opening 28 of the cutter head support 20, and the drainage pump 33 automatically stops when the drainage pump 33 falls below the water level at which continuous operation is possible. Does not burn.

[0010]

【Example】

(Overall Structure of Rock Tunnel Excavator) As shown in FIG. 2, the cutter head 2 is provided in front of the cutter head support 20.
1 is rotatably provided and is an electric motor 22 having a built-in speed reducer.
Is driven to rotate.

A main beam 23 is attached to the rear of the cutter head support 20 so as to face rearward, and a gripper frame 24 is slidably provided along the main beam 23. The gripper frame 24 and the cutter head support 20 are provided. The thrust cylinder 25 is connected to the cutter head support 20, the gripper frame 24.
A front gripper and a rear gripper (not shown) are attached to the.

A hopper chute 26 is attached to the front surface of the cutter head support 20, the hopper chute 26 is located inside the cutter head 21, and a sediment carrying means 27 such as a belt conveyor is located below the hopper chute 26. Means 27 are openings 28 in the cutter head support 20,
It projects rearward from the gripper frame 24.

A bucket 29 is provided in the cutter head 21.
The rock sludge taken into the cutter head 21 is conveyed upward by the bucket 29 and dropped into the hopper chute 26. The rock sludge is dropped from the hopper chute 26 to the earth and sand conveying means 27 to convey the rock sludge to the earth and sand conveying means 27. Therefore, the bucket 29 has a large number of holes 30 for draining water.

An outer shield 31 is attached to the rear portion of the cutter head support 21, and an inner shield 32 is attached to the front portion of the gripper frame 24.
1 and the inner shield 32 overlap with each other to form a full shield type rock tunnel excavator.

A drainage pump 33 consisting of a submersible pump is attached to the lower portion of the cutter head support 21.
The suction portion 34 of the drainage pump 33 is the cutter head 21.
It becomes possible to suck the spring water accumulated between the cutter head 21 and the front part of the cutter head support 20 in opposition to the rear part, and the drain pipe 35 of the drainage pump 33 is arranged along the earth and sand conveying means 27 to the rear part. It is attached to.

(Specific Structure of Cutter Head Support 20)
As shown in FIGS. 3 and 4, the intermediate partition wall 41, the left and right rear vertical plates 42, 42, and the left and right rear surface plates 43, 43 are fixed to the cylindrical body 40, and the inner partition body 44 and the outer cylindrical body are attached to the intermediate partition wall 41. 45 is fixed to the front, and the first and second ring-shaped plates 47 and 48 are fixed across the cylinder 40 and the front-side cylinder 46 that is fixed to the outer cylinder 45. Rear vertical plate 4
The space between Nos. 2 and 42 and the inside of the inner cylindrical body 44 serve as an opening 28 of the cutter head support 20, and chutes 26a are attached to the left and right front plates 49, 49 so as to face each other to form the hopper chute 26.

(Concrete Structure of Cutter Head 21) As shown in FIG. 3, there is provided a main body 52 having a substantially lower tubular shape whose rear portion is opened by a front wall 50 and an outer peripheral wall 51, and an inner peripheral portion of the outer peripheral wall 51. A ring-shaped body 53 fixed to the outer cylindrical body 45 is rotatably supported on the outer cylindrical body 45 by a main bearing 54, a cutter 55 is attached to the front wall 50, and a rock slide inlet 56 is formed. Multiple buckets 29 on the inside
Are radially fixed to each other, and a large number of slit-shaped water draining holes 30 are formed in the bucket 29 of the bucket 29.
The rear end wall 57 of 1 is inclined with respect to the vertical.

(Shape of Suction Portion 34 of Drain Pump 33) As shown in FIGS. 5 and 6, a pair of partition vertical plates 60 are provided on both sides of the lowermost part of the tubular body 40 as a boundary and the intermediate partition wall 41. The pump mounting plate 61 is fixed to the pair of partition vertical plates 60 and the cylindrical body 40 obliquely with respect to the vertical, and the pump mounting plate 61, the intermediate partition wall 41, and the cylindrical body 40 are attached to each other. The plate 62 is fixed to form a first inflow chamber 63 in the lower rear part of the cutter head support 20.

A notch 47a is formed in the vicinity of the lowermost portion of the first ring-shaped plate 47 as shown in FIG.
7a, intermediate partition wall 41, outer cylinder 45, and front-side cylinder 46
And a pair of partition vertical plates 64 are fixed across the second ring-shaped plate 48, and an intermediate partition vertical plate 65 is fixed between the pair of partition vertical plates 64 and the outer cylinder 45. 65, a pair of partition vertical plates 64, and four guide plates 66 are fixed to the outer cylindrical body 45 obliquely with respect to the front-rear direction in parallel with each other, and the second guide plates 66 are provided near the lower front part of the cutter head support 20. The inflow chamber 67 is configured.

The first inflow chamber 63 and the second inflow chamber 67 communicate with each other through a pair of pipes 68 to form the suction portion 34, and a pair of drainage pumps 33 are attached to the pump attachment plate 61. The suction ports 33 a of the drainage pump 33 are opened to the first chamber 63.

In the embodiment, the drainage pump 3 is used.
The suction port 33a of No. 3 is connected to the pipe 68, and the pipe 6
Although 8 is opened to the first inflow chamber 63 by a hole (not shown), the pipe 68 is opened to the first inflow chamber 63 so that the drainage pump 33 directly sucks the spring water into the first inflow chamber 63. The first inflow chamber 63 and the second inflow chamber 67 may be set to 1
It may be one inflow chamber.

(Structure of foreign matter mixture preventing means) The suction portion 3
4, the inflow side wall 6 of the second inflow chamber 67 which is the spring water suction side part.
7a, that is, a large number of inflow holes 69 are formed in the portion between the pair of partition vertical plates 64, 64 of the second ring-shaped plate 48, and spring water flows in, but exceeds the size that the drainage pump 33 can tolerate. The foreign matter mixture preventing unit 70 is configured so that foreign matter such as small pieces and small stones are not mixed.

The inlet hole 69 has a small diameter on the inlet side and a large taper diameter on the outlet side.

The foreign matter mixture preventing means 70 may be a lattice or net. That is, a shape having a large number of inflow holes 69 may be used.

(First Structure of Clogging Prevention Means) The Second Structure
A ring-shaped gate plate 71 is rotatably provided on the front surface of the ring-shaped plate 48, and the gate plate 71 is formed with an opening 72 that opens to the inflow side wall 67 a of the second inflow chamber 67. As shown in FIG. 7, when the opening 72 of the gate plate 71 is located at a position facing the inflow side wall 67a, the inflow hole 69 communicates with the opening 72 in front and the spring water flows in. When 71 is rotated to the position shown in FIG. 8, the inflow hole 69 is closed by the gate plate 71 so that rock sludge does not reach the inflow hole 69 and the inflow hole 69 is not clogged. The clogging prevention means 73 is configured.

That is, since the drainage pump 33 is not driven when the amount of spring water is small, when rock sludge reaches the inflow hole 69, pebbles, small pieces, etc. are clogged in the inflow hole 69. In that case, the gate plate 71 is rotated. Therefore, the rock sludge is prevented from reaching the inflow hole 69.

(Structure for Rotating Gate Plate 71) As shown in FIG. 3, an engaging / disengaging mechanism 80 is provided between the rear end wall 57 of the cutter head 21 and the rear end wall 57 and the gate plate 71. As shown in FIG. 9, the mechanism 80 includes a boss 81 attached to the rear end wall 57, a pin 82 fitted to the boss 81, and a pin hole 83 formed in the gate plate 71. When fitted, the cutter head 21 and the gate plate 71 are connected, and when the cutter head 21 is rotated in that state, the gate plate 71 also rotates together with the cutter head 21, and when the pin 82 is pulled out from the pin hole 83, only the cutter head 21 rotates. To do.

As described above, when the cutter head 21 alone is rotated, the gate plate 71 is prevented from rolling around.
As shown in FIG. 10, the lock pin 84 provided on the gate plate 71 is fitted into the pin hole 85 of the second ring-shaped plate 48 to prevent the gate plate 71 from rotating, and the pin hole 85 has an opening 72. As shown in FIG. 8, a pair is formed so as to be locked at a position facing the inflow hole 69 and a position at which the inflow hole 69 is closed.

The gate plate 71 may be directly rotated by a cylinder or a motor, may be manually rotated, and the gate plate 71 may be linearly moved.

(Second Structure of Clogging Prevention Means) As shown in FIG. 5, a back scraper 90 is attached to the rear end wall 57 of the cutter head 21 so as to face the inner peripheral surface 40a of the front end of the cylindrical body 40. As shown in FIG. 11, the back plate 90 is formed by fixing a box body 92 bent in a substantially U-shape to a mounting plate 91, and the base end portion of the bottom surface 93 of the box body 92 is the mounting plate 91. It is continuous with the notch recess 94, and a tip wall 95 is attached to the tip of the bottom surface 93 thereof.

As shown in FIG. 5, the proximal end of the box body 92 is inserted into the opening hole 96 of the rear end wall 57, and the mounting plate 91 is bolted to the rear end wall 57 to mount it. The bottom surface 93 of the body 92 faces the cutter head rotation direction, and the tip wall 95 faces the front end inner peripheral surface 40a of the tubular body 40.

Since the cutter head 21 rotates, the rock scrap accumulated on the inner peripheral surface 40a of the front end of the cylindrical body 40 is scraped off by the box 92 of the back scraper 90, and the rock scrap is cut off by the cutter head 21. As the back scraper 90 rotates upward together with 21, the back scraper 90 moves along the bottom surface 93 of the box body 92, falls into the cutter head 21 through the opening hole 96, and falls from the hopper chute 26 into the earth and sand conveying means 27.

As a result, the inner peripheral surface 40a of the front end of the cylindrical body 40a
The rock sludge accumulated in the front part of the inflow hole 69 is scraped off by the back scraper 90 and dropped onto the earth and sand conveying means 27, and is conveyed by the earth and sand conveying means 27. It is possible to prevent clogging, and it is possible to prevent clogging of the opening 72 of the gate plate 71 and the rotation of the gate plate 71.

(Structure of Cleaning Means) FIG. 5, FIG. 6, FIG.
As shown in FIG. 13, a pair of first, second and third sprinkling pipes 10 to which the cleaning liquid is pumped by a cleaning pump (not shown).
0, 101, 102 are provided, and the first sprinkling pipe 100
Sprays the cleaning liquid onto the pipe 68, and the second sprinkling pipe 1
01 sprays the cleaning liquid into the second inflow chamber 67, and the third water sprinkling pipe 102 is integrally continuous with the water sprinkling pipe 103 provided in the second inflow chamber 67 so as to face the inflow side wall 67a. The cleaning liquid is sprayed from the large number of injection holes 104 to the inflow hole 69.

Because of this, when the drainage pump 33 is driven for a long period of time and when the drainage pump 33 is driven to discharge spring water, the first and second drainage pumps 33 are driven.
-The pipe 68, the second inflow chamber 67, and the inflow hole 6 are formed by injecting the cleaning liquid from the third water sprinkling pipes 100, 101, 102.
Since foreign substances such as rock chips deposited on 9 can be washed,
The spring water smoothly flows into the inflow hole 69, the second inflow chamber 67, and the pipe 68 and is sucked by the drainage pump 33.

That is, when the drainage pump 33 is stopped for a long period of time, foreign matter such as rock chips adheres to and accumulates in the inflow hole 69, the second inflow chamber 67, and the pipe 68, and the flow of the spring water deteriorates as it is. Therefore, stirring and washing are performed as described above.

The first and second sprinkling pipes 100, 101
When the drainage pump 33 is driven, the supply of the cleaning liquid is stopped, but the cleaning liquid is continuously supplied to the third sprinkling pipe 102 and the cleaning liquid is continuously sprayed to the inflow hole 69.

Thus, the inflow hole 69 is prevented from being clogged with small pieces of rock scrap, small stones, or the like. That is, the third water sprinkling pipe 102 and the water sprinkling pipe 103 are provided with the foreign matter mixing prevention means 70.
It also serves as a means to prevent clogging.

(Driving Device for Pump 33 for Drainage) As shown in FIG. 5, a water level sensor 110 composed of a float switch is attached to the first inflow chamber 63.
0 indicates that the water level in the first inflow chamber 63 is the cutter head support 2
0 is slightly lower than the opening 28 of the drainage pump 33, and is turned on when the drainage pump 33 reaches a predetermined height at which continuous operation is possible. When the water level sensor 110 is turned on by connecting to the controller 111 as shown in FIG. A start signal is output to drive and the stop signal is output when it is turned off to stop the drainage pump 33.
A manual switch 112 is connected to the controller 111. When the manual switch 112 is turned on, the controller 111 outputs a start signal to the drainage pump 33 to drive it, and when it is turned off, the drainage pump 33 is stopped. I am able to do it.

In this way, the water level sensor 110 detects the water level on the face of the face, and when the water level reaches a predetermined height, the drainage pump 33 is automatically driven. Therefore, when there is a lot of spring water, the opening of the cutter head 20 is opened. It is possible to prevent the spring water from overflowing from 28, and to stop the drainage pump 33 when the water level becomes equal to or lower than a predetermined height (the lower limit of the water level that is possible even when the drainage pump 33 continuously operates). Pump 3
The seizure of 3 is prevented.

[0041]

According to the first aspect of the present invention, since spring water is sucked in from the lower portion between the front portion of the cutter head support 20 and the rear portion of the cutter head 21, the amount of spring water is large and the spring water is in the cutter head 21. When it flows inside and accumulates between the front part of the cutter head support 20 and the rear part of the cutter head 21,
The accumulated spring water can be sucked and drained by the drainage pump 33. Therefore, the spring water does not overflow from the opening 28 of the cutter head support 20, and the excavation can be performed even when the spring water amount is large.

According to the second aspect of the invention, foreign matter does not enter the suction portion 34, so that the drainage pump 33 does not malfunction due to foreign matter.

According to the third aspect of the present invention, since the drainage pump 33 does not become unable to suck the spring water because the inflow hole 69 is not clogged with foreign matter, the spring water is discharged by the drainage pump 33 for a long time. Can drain.

According to the fourth invention, the gate plate 71
The rock scrap is prevented from reaching the inflow hole 69 by closing the inflow hole 69 at, and the rock scrap accumulated on the front part of the inflow hole 69 is scraped off by the back scraper 90 to convey the conveying means 27.
Since the cleaning liquid can be sprayed to the inflow hole 69 with a water sprinkling pipe, it is possible to prevent the inflow hole 69 from being clogged with small pieces of rock chips or small stones.

According to the fifth invention, foreign matters such as rock chips accumulated in the suction portion 34 can be removed by stirring and washing,
When the drainage pump 33 is driven after being stopped for a long period of time and while the drainage pump 33 is being driven, foreign matter accumulated in the suction part 34 is stirred and washed to remove the foreign matter, so that the spring water smoothly flows in the suction part 34. Then, the drainage pump 33 can surely drain the water.

According to the sixth aspect of the invention, when the water level of the spring water accumulated in the front part of the cutter head support 20 becomes close to the height below the opening 28 of the cutter head support 20, the drainage pump 3
3 automatically drives and drains the spring water, so that the spring water does not overflow from the opening 28 of the cutter head support 20, and when the drainage pump 33 is below the water level at which continuous operation is possible, the drainage pump 33 Since it automatically stops, the drainage pump 33 does not seize.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conventional rock tunnel excavator.

FIG. 2 is a cross-sectional view of a rock tunnel excavator showing an embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a cutter head support portion.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is an enlarged cross-sectional view of a spring water suction portion.

6 is a developed cross-sectional view of FIG.

7 is a cross-sectional view taken along line CC of FIG.

FIG. 8 is a front view of a gate plate portion.

FIG. 9 is a sectional view of a disengaged portion of the gate plate.

FIG. 10 is a sectional view of a gate plate lock portion.

FIG. 11 is a perspective view of a back scraper.

12 is a cross-sectional view taken along the line DD of FIG.

13 is a cross-sectional view taken along line EE of FIG.

FIG. 14 is a drive circuit diagram of a drainage pump.

[Explanation of symbols]

 20 ... Cutter head support 21 ... Cutter head 24 ... Gripper frame 25 ... Thrust cylinder 26 ... Hopper chute 27 ... Sediment transport means 28 ... Opening part 33 ... Drainage pump 34 ... Suction part 69 ... Inflow hole 70 ... Foreign matter mixture prevention means 71 ... gate plate 72 ... opening 73 ... clogging prevention means 90 ... scraper 110 ... water level sensor 111 ... controller.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor and Katsuhiko 9-22 Ise-cho, Ashiya-shi, Hyogo (72) Inventor Yoshito Minami 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka factory ( 72) Inventor Misao Kajiwara 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Osaka factory

Claims (6)

[Claims] 1. A cutter head 21 is rotatably provided at a front portion of the cutter head support 20, and a gripper frame 24 is attached to a rear portion of the cutter head support 20 by a slide cylinder 25 so as to be relatively movable in the front-rear direction. A rock excavator excavated by the cutter head 21 is dropped by a hopper chute 26 onto a sediment conveying means 27, and the sediment conveying means 27 is projected rearward from an opening 28 of the cutter head support 20. Front part of support 20 and cutter head 2
1. A rock tunnel excavator, characterized in that a suction part 34 of spring water is provided in a lower portion between the rear part of 1 and a suction side of a drainage pump 33 is connected to the suction part 34. 2. The rock tunnel excavator according to claim 1, further comprising a foreign matter mixture prevention unit 70 provided at a spring water suction side portion of the suction portion 34, through which the spring water passes but the foreign matter does not pass. 3. The foreign matter mixture preventing means 70 is provided by a large number of small-diameter inflow holes 69 through which spring water passes but foreign matter does not pass, and a clogging preventing means 73 for preventing foreign matter from clogging the large number of inflow holes 69. The rock tunnel excavator according to claim 2, which is provided. 4. An inflow chamber facing the rear of the cutter head 21 is formed in the lower part of the cutter head support 20 to form a suction part 34, and a large number of inflow holes 6 are formed in the inflow side wall of this inflow chamber.
9 is formed as a foreign matter mixture prevention means 70, and a gate plate 71 movably provided at a front portion of the inflow side wall to a position for closing the inflow hole 69 and a position for opening the inflow hole 69, the cutter head 21. The back scraper 9 attached to the rear part of the back scraper 9 scrapes off the dirt and debris accumulated on the front part of the inflow side wall and drops it on the hopper chute 26.
The rock tunnel excavator according to claim 3, wherein the clogging prevention means 73 is formed by any one of a sprinkling pipe for injecting a cleaning liquid into the inflow hole 69 or a combination of a plurality of sprinkling pipes. 5. The rock tunnel excavator according to claim 1, further comprising a cleaning means for injecting a cleaning liquid into the suction part 34 to stir and clean the foreign matters accumulated on the suction part 34. 6. A water level sensor 110 for detecting the water level at which the drainage pump 33 can continuously operate, because the water level near the face inside the rock tunnel excavator is slightly lower than the lower height of the opening 28 of the cutter head support 20. The rock tunnel excavator according to claim 1, 2 or 3 or 4 or 5, further comprising a controller 111 that outputs a drive signal and a stop signal to the drainage pump 33 according to the water level detection signal of the water level sensor 110.