JPH06235290A - Shield excavator with cutting device for drain material - Google Patents

Abstract

PURPOSE:To efficiently cut a drain material without stopping the excavating work of a shield excavator. CONSTITUTION:A water nozzle mounting boss 11 is arranged on the outside part of a cutter head provided on the front surface of a shield excavator 1. The injecting direction of a superhigh pressure jet water W from a water nozzle 12 mounted on the water nozzle mounting boss 11 is set to the effective cut distance L of a drain material 21. The water nozzle 12 is mounted toward the part nearly making contact with the section periphery of the shield excavator 1 when the shield excavator 1 is advanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine equipped with a cutting device for drain material, and more particularly to a water jet or a shield using the water jet and a cutting blade as a device for cutting the drain material. It concerns excavators.

[0002]

2. Description of the Related Art In a shield construction method, a synthetic fiber bundle called a drain material sometimes appears on the face of a face. Therefore, it is necessary to cut the drain material and remove it, but as a cutting method, after improving and stabilizing the cutting face ground by injecting a chemical solution, the worker installed the partition wall and the cutting face in front of the shield machine. And a method of cutting the drain material by using a pick or a gas cutter, and the drain material is hooked on the cutter bit provided on the front end face of the shield machine to remove the drain material. A method of forcibly tearing and cutting is known.

[0003]

In the former case of the prior art described above, while the worker enters the space between the partition wall and the face of the shield machine to cut the drain material, the shield machine is operated. However, since the space between the partition wall and the face is narrow, the workability is poor, and the working environment is deteriorated by the gas generated during cutting, which is extremely dangerous. At the same time, the work is performed under pressure, which makes the work difficult. Further, in the latter case, since the drain material is forcibly taken into the shield by the cutter bit, the surrounding ground is disturbed, the ground surface is sunk, and the drain material may be entangled with the cutter bit.

Therefore, there arises a technical problem to be solved in order to efficiently cut the drain material without stopping the work of the shield machine. The present invention solves the problem. With the goal.

[0005]

The present invention has been proposed in order to achieve the above-mentioned object, and a water nozzle is projected on the outer peripheral side of a cutter head arranged in the front part of a shield machine. Provided with a water nozzle mounting boss, further, the injection direction of the super-high pressure jet water from the water nozzle is the effective cutting distance of the drain material,
Further, when the shield machine advances, the water nozzle is obliquely outwardly directed so as to be directed to a portion which is substantially in contact with the periphery of the cross section of the shield machine. A shield machine equipped with a device, and the water nozzle sprays ultra-high pressure jet water over the entire circumference of the rotation trajectory of the cutter head, and a cutting blade is provided outside the water nozzle on the outer peripheral portion of the cutter head. The shield machine equipped with the cutting device for drain material according to claim 1, which is mounted rotatably, and the jetting of the ultra-high pressure jet water from the water nozzle is left and right from the center of the cutter head. 3. The cutting of the drain material or the like according to claim 2, wherein the upper portion within a range of about 45 degrees is blocked or reduced. There is provided a shield machine having a device.

[0006]

According to the first aspect of the invention, the ultra-high pressure jet water is jetted toward the face of the face from the water nozzle incorporated in the outer peripheral side of the cutter head of the shield machine. At this time, the ultra-high pressure jet water jetted from the water nozzle is jetted toward a portion that is substantially in contact with the periphery of the cross section of the shield machine when the shield machine is propelled. Further, if the most effective distance for cutting by the ultra-high pressure jet water is, for example, about 40 cm, the distance of 40 cm is a point substantially in contact with the periphery of the cross section of the shield machine, so the water nozzle is a cutter. By rotating the head, the drain material is most efficiently cut along the peripheral portion of the cross section of the shield machine, and thus the drain material may be pulled in by the cutter bit or the like attached to the cutter head. Disappear. Thus, the excavation work of the face face by the shield machine and the cutting work of the drain material by the water jet water are simultaneously performed.

Next, according to the second aspect of the invention, with the rotation of the cutting head of the shield machine, the cutting blade incorporated in the cutting head rotates and appears on the face of the face along the rotation locus. Cut off the drain material, etc. Thus, the drain material may be distorted under the influence of earth pressure or the like. In this case, the cutting blade may not be able to cut the entire width of the cut portion, but the uncut portion is surely cut by the water jet. Therefore, the excavation work of the face face by the shield machine and the cutting work of the drain material are performed at the same time.
And it can be performed smoothly. Thus, since it is not necessary to use a large-sized cutting blade, it becomes easy to attach the cutting blade to the cutter head.

Next, in the invention according to claim 3, the jet of the super-high pressure jet water from the water nozzle is about 45 degrees to the left and right above the center of the cutter head of the shield machine.
That is, in the range of about 90 degrees, the pressure is temporarily stopped or the pressure of the super high pressure jet water is reduced, so that the upper part of the tunnel is jetted by the jet of the super high pressure jet water especially when excavating the soft ground. There is no such thing as falling down, and smooth digging and cutting of drain material etc. can be performed. At this time, since the cutting by the cutting blade is performed even within the range of 90 degrees, even if the drain material is distorted, the cutting width by the cutting blade is almost the same as that of the drain material. Naturally, the uncut portion will be easily torn even if it catches on the cutter bit when the cutter head rotates, so the whole drain material is pulled in by the cutter bit and the ground collapse phenomenon. There is no such thing as coming. Thus, the excavation work by the shield excavator and the cutting work of the drain material and the like can be performed simultaneously and smoothly.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. In the figure, 1 indicates a shield machine. At the front end of the shield machine 1 is provided a cutas pork 3 to which cutter bits 2, 2 ... Are attached. In the illustrated example, the cutas pork 3 is formed in a cross shape to form a cutter head, but the cutter head should not be limited to this. The cutass pork 3 is fixed to the rotary shaft 4, and the partition wall provided on the front surface of the shield machine 1 with the rear portion of the rotary shaft 4 at a constant distance from the cuttas pork 3. 5 through which the large gear 6 is fitted, and the large gear 6 is meshed with the pinion gear 8 of the drive motor 7 to rotate the Katta spoke 3 and the cutter bit attached to the Katta pork 3. The facet 9 is excavated at 2, 2, ... And the chips are discharged to the outside via the screw conveyor 10.

Then, the tip portion of the cutass pork 3 is cut out 3a, and the water nozzle mounting boss 11 is mounted on the cutout 3a so as to be rotatable forward and backward by 180 degrees. Therefore,
The water nozzle mounting boss 11 is the Katta pork 3
The water nozzle 12 is replaceably fitted or screwed to the front of the water nozzle mounting boss 11. Further, the water nozzle mounting bosses 11 having the water nozzles 12 are respectively provided to the tip end portion and the middle portion of the Kattus pork 3 respectively.

Further, a large gear 13 is fitted under the water nozzle mounting boss 11, and the large gear 13 is meshed with a pinion gear 15 of a reversing drive motor 14, and the shaft of the water nozzle mounting boss. Bearing 1 in part 11a
It is supported by the Cattus pork 3 via 6 and can be rotated forward and backward by 180 degrees by driving the reversing drive motor 14.

An ultrahigh pressure jet water passage 4a is opened in the central axis direction of the rotary shaft 4, and the front end of the ultrahigh pressure jet water passage 4a is connected to a pipe 18 via a swivel joint 17. The pipe 18 is connected to the water nozzle 12. Further, the rear end portion of the ultra-high pressure jet water passage 4a is also connected to the high pressure hose 19 via the swivel joint 17, and the high pressure hose 19 is connected to the jet pump 20 to be generated by the jet pump 20. The super-high-pressure jet water W is jetted from the water nozzle 12 to the face 9 to cut the drain material 21, 21 ... Of the synthetic fiber bundle appearing on the face 9 with the super-high-pressure jet water W. It is configured to be able to.

As shown in FIG. 2, the water nozzle 12 provided on the outer peripheral side of the Kattus pork 3 has a drain material 21, 21 in which the super-high pressure jet water W is jetted from the water nozzle 12. Full width (about 10 cm)
The effective cutting distance L (about 40 cm) is the shield machine 1
The water nozzle 12 is obliquely provided outward so as to face a portion that is substantially in contact with the periphery of the cross section of the forward position.

Thus, the water nozzle 12 can effectively cut the drain members 21, 21 ... In the peripheral portion of the cross section of the shield machine 1 based on the rotation of the Katta spoke 3. Further, the water nozzle 12 provided in the middle part of the Kattus pork 3 is arranged so that the ultra-high pressure jet water W jetted from the water nozzle 12 is orthogonal to the drain materials 21, 21 ... Appearing on the face. Therefore, the water nozzle 12 of the intermediate portion is provided.
Is the drain material 2 by rotation of the Katta pork 3.
.. are cut corresponding to the rotation locus of the water nozzle 12, so that the drain members 21, 21, ... Hook on the cutter bits 2, 2 ,. , 21 ... Are not drawn in by the cutter bits 2, 2.

As the ultra-high pressure water jet water W, water containing a water-soluble polymer may be used. Thus, an acrylic ionic water-soluble polymer can be used as the water-soluble polymer. In that case, the drain material 21 formed by the ultra-high pressure water jet water W,
The cutting of 21 ... is most effectively performed, but should not be limited to this.

Next, an embodiment of the invention described in claims 2 and 3 will be described. In the figure, recesses 3b are provided at both ends of the other cutas pork 3 to which the water nozzles 12 and 12 are not attached and which are open in the front-rear direction. Further, one end of the blade mounting body 22 is pivotally attached to one side of the recess 3b, and the cutting blade 24 is rotatably supported at the other end of the blade mounting body 22.

The cutting blade 24 is mounted so that its front portion projects forward from the tip end portions of the cutting bits 2, 2 ... And the cutting blade 24 is mounted in the blade mounting body 22. It is rotatably formed by a hydraulic motor (not shown) provided. In addition, the tip of the piston rod 25a of the tiltable cylinder 25 is provided on the back surface of the blade mounting body 22 so that the blade mounting body 22 can be tilted backward 90 degrees and further raised up 90 degrees. And pivot the collapsible cylinder 25 to the cutas pork 3
Is pivoted on the back of.

Thus, the water nozzle mounting boss 1
1 and the blade mounting body 22 are rotated or tilted respectively when the water nozzle 12 or the cutting blade 24 is replaced, and the replacement is performed by any method. . Further, the cutting blade 24 may have a problem in that the soil material adheres to the cutting blade 24 to cut the drain materials 21, 21. Therefore, in order to prevent this, it is desirable to separately jet high-pressure water toward the cutting blade 24. Then, the high-pressure water is passed through the center of the rotary shaft 4 and a high-pressure hose (not shown) arranged in the Kattus pork 3 to jet the high-pressure water toward the cutting blade 24, and
The earth and sand adhering to the cutting blade 24 is removed. A swivel joint is provided at an appropriate place on the high pressure hose.

Thus, the cutting blade 24
Cuts the drain materials 21, 21 ... Appearing on the face 9 along the rotational trajectory of the cutting blade 24.
At this time, the drain members 21, 21, ... May be distorted due to the influence of earth pressure or the like. In that case, the cutting blade 24 may not be able to cut across the entire width (approximately 10 cm) of the drain members 21, 21 ... At the cutting surface, but in this case as well, from the water nozzle 12 The uncut portion is also cut by the jetting of the ultra-high pressure jet water W, and thus the drain materials 21, 21 ...
Means that a portion around the cross section of the shield machine 1 is cut, and the shield machine 1 is not drawn in by being entangled with the cutter bits 2, 2 ... Therefore, the excavation by the shield machine 1 and the cutting work of the drain members 21, 21 ... Can be performed at the same time without causing the ground to collapse.

Further, when the cross-section peripheral portion of the shield machine 1 is cut by jetting the ultra-high pressure jet water W from the water nozzle 12, if the ground is soft ground, the upper part of the excavated tunnel T is May fall. Therefore, at least in the upper portion of the rotation trajectory of the water nozzle 12, the injection of the super-high pressure jet water W from the water nozzle 12 disposed at the outer side of the cutas pork 3 is stopped or the pressure is reduced. It is necessary to prevent the collapse phenomenon.

Therefore, in the invention according to claim 3, the button 26 is provided so as to project from the rotary shaft 4, and the touch sensors 27 and 2 are respectively provided on the partition wall 5 in the direction of about 45 degrees to the left and right from the center of the rotary shaft 4.
7, a solenoid valve 28 is provided at the discharge port of the jet pump 20, and the solenoid valve 28 is opened and closed according to a command from the control panel 29. Therefore,
When the button 26 touches the one touch sensor 27 as the rotary shaft 4 rotates, the control panel 29 stops or reduces the jetting of the super-high pressure jet water W jetted from the water nozzle 12 until now. Further, when the other touch sensor 27 is touched, the injection from the water nozzle 12 is restarted. That is, the ultra-high pressure jet water W from the water nozzle 12
Since the above-mentioned injection is not performed within the range of approximately 90 degrees above the shield machine 1, it is possible that the ground collapses due to the injection of the ultra-high pressure jet water W. Can be spared in advance.

In the above-mentioned embodiment, the spoke head is used as a cutter head for the earth pressure system shield. However, the present invention is not limited to this, and the face plate used for the muddy water shield machine is not limited thereto. Shaped cutter heads may be implemented. The present invention can be modified in various ways without departing from the spirit of the present invention.
And, it goes without saying that the present invention extends to the modified one.

[0023]

As described in detail in the above one embodiment, the present invention can most effectively cut the outer periphery of the drain material and the like which appears on the face of the shield machine in front of the shield machine, and the inner portion thereof. It is possible to easily discharge the cut drain material and the like. Therefore, the ground except for the cross section of the shield excavation is not affected, and the drain material is not pulled in by the cutter bit, so that the ground subsidence does not occur.

Further, the cutting work of the drain material can be performed without stopping the excavation work of the shield machine.
In addition, it is not necessary for a worker to come out to the face of the face to perform the cutting work of the drain material, so that the invention can bring about various effects such as contributing to improvement of workability and safety.

[Brief description of drawings]

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

FIG. 2 is a partially cutaway side view when the water nozzle portion rotates upward.

FIG. 3 is an explanatory diagram showing a relationship between a touch sensor and a button.

FIG. 4 is a partially cutaway side view when one cutting blade rotates upward.

[Explanation of symbols]

 1 shield machine 3 cutter spoke 3a notch 3b recess 5 partition wall 11 water nozzle mounting boss 12 water nozzle 22 blade mounting body 24 cutting blade 26 button 27 touch sensor 28 solenoid valve 29 control panel W ultra-high pressure jet water

Front page continuation (72) Inventor Yusuke Matsushita 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagai Gumi Co., Ltd. Tokyo headquarters (72) Inventor Shigeharu Matsushita 1 Tomi-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Kumagaya Gumi Co., Ltd. In Yokohama Branch (72) Inventor Shin Koda 2-1-1 Honohara, Toyokawa City, Aichi Kumagaya Gumi Toyokawa Factory

Claims (3)

[Claims] 1. A water nozzle mounting boss having a protruding water nozzle is provided on the outer peripheral side of a cutter head disposed in the front part of the shield machine, and the jet direction of ultra-high pressure jet water from the water nozzle is further provided. Is an effective distance for cutting the drain material, etc., and when the shield machine is advanced, the water nozzle is obliquely outwardly directed so as to be directed to a portion that is substantially in contact with the periphery of the cross section of the shield machine. A shield machine equipped with a cutting device for drain material etc. 2. The water nozzle sprays ultra-high pressure jet water over the entire periphery of the rotation trajectory of the cutter head, and a cutting blade is rotatably attached to the outer periphery of the cutter head outside the water nozzle. A shield machine having a cutting device for drain material according to claim 1, which is provided. 3. The jet of ultra-high pressure jet water from the water nozzle is approximately 45 to the left and right of the center of the cutter head.
The shield machine having a cutting device for drain material according to claim 2, wherein the shield machine is cut off or reduced at an upper portion within a range of degrees.