JP2001049690A - Horizontally excavating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontally excavating machine capable of excavating ground laterally even when an obstacle such as a pedestrian overbridge exists above the machine and improving the working efficiency. SOLUTION: A main frame 4 is fitted to a self-traveling truck 1. A vertical guide frame 7 is attached to the main frame 4 for lateral movement. An extensible frame 12 having several stages extended or contracted by an extensible device such as a hydraulic cylinder 14 and vertically moved with respect to the vertical frame 7 is projectably fitted to the upper part of the main frame 4. A cutter driving device 16 is mounted to the last stage frame 12b of the extensible frame 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal moat excavator used for constructing a continuous wall for stopping water for constructing a basement portion of a concrete building, and more particularly to a self-propelled bogie. A vertical guide frame is attached to the main body of the main body so as to be horizontally movable by a horizontal movement device, and a cutter drive device which is moved up and down by a vertical movement device is attached to the vertical guide frame, and an auger screw type cutter or an endless chain type cutter is attached by the cutter drive device. The present invention relates to a horizontal moat excavator in which a cutter is moved by a lateral moving device after being lowered to a predetermined depth while being driven, and at the same time, a continuous wall is constructed while a hardening agent is being injected.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 10-306465 discloses a conventional horizontal moat excavator of this type which uses a leader. What is described in this publication is
In each case, a leader is fixed to the outer surface of a traveling frame of the self-propelled carriage, a main frame is attached to a lower portion of the leader, and a cutter driving device that is horizontally moved by a lateral moving device is attached to the main frame. A leader is provided to add the cutter pieces and to raise the cutter drive during disassembly.

[0003]

The horizontal moat excavator described in the above publication excavates while extending a cutter piece during vertical excavation. However, in the work of extending the additional cutter piece, ground excavation has already been performed. Since a space is required between the upper end of the uppermost cutter piece buried inside and the cutter driving device to insert the cutter piece for replenishment, movement in the height direction larger than the length of the replenishment cutter piece A leader is required to increase the distance, and the height of the entire horizontal excavator also increases.Therefore, the obstruction at the top of the excavator, for example, under the pedestrian bridge, obstructs the leader, and the side of the horizontal excavator There is a problem that it cannot be moved and an underground continuous wall cannot be constructed.

In the conventional horizontal moat excavator, since the main frame is mounted on the traveling frame of the self-propelled bogie, the cutter is mounted on the side of the traveling frame. The distance from the center to the cutter becomes large. For this reason, the overturning moment on the cutter side increases, and a self-propelled bogie having a stable moment corresponding to the overturning moment is required, and there is also a problem that the entire excavator becomes large.

In addition, since the main frame is mounted on the traveling frame, it is impossible to adjust the distance between the main frame and the traveling frame. In this case, the position and orientation of the main frame must be adjusted by the traveling of the self-propelled bogie, and in order to make adjustments by this traveling, the entire cutter must be once collected on the ground, which reduces the construction efficiency. There is a problem of doing it.

The present invention has been made in view of the above-mentioned problems, and has a configuration in which lateral excavation can be performed even when there is an obstacle such as a pedestrian bridge above the horizontal excavator, and an improvement in work efficiency can be achieved. It is intended to provide a horizontal excavator.

Another object of the present invention is to provide an inexpensive horizontal moat excavator that can reduce the distance from the center of the excavator main body to the cutter, thereby reducing the size of the entire excavator.

It is another object of the present invention to provide a horizontal moat excavator that can adjust the excavation position and does not cause a decrease in construction efficiency due to the raising of a cutter or the like.

[0009]

According to a first aspect of the present invention, there is provided a horizontal moat excavator having a main frame mounted on a main body of a self-propelled bogie having a traveling body, and a vertical guide frame horizontally moved by a horizontal moving device mounted on the main frame. A cutter driving device for detachably connecting and driving an auger screw type cutter or an endless chain type cutter to the vertical guide frame is mounted so as to be vertically movable, and an auger screw type cutter or an endless chain type cutter is connected to the cutter driving device. In a horizontal moat excavator that drives and excavates by raising and lowering the cutter and laterally moving by the horizontal moving device, the vertical guide frame has a lifting frame that is raised and lowered with respect to the vertical guide frame, protruding above the main frame. Mounting possible, mounting the cutter drive on the lifting frame Characterized in that was.

According to a second aspect of the present invention, there is provided a horizontal moat excavator having a main frame mounted on a main body of a self-propelled bogie having a traveling body, a vertical guide frame horizontally moved by a horizontal moving device mounted on the main frame, and mounted on the vertical guide frame. A cutter driving device for detachably connecting and driving an auger screw type cutter or an endless chain type cutter is mounted in a vertically movable manner, and an auger screw type cutter or an endless chain type cutter is connected to and driven by the cutter driving device. In a horizontal moat excavator that performs excavation by vertical movement and horizontal movement by the horizontal moving device, the vertical guide frame includes a plurality of telescopic frames that are extended and retracted with respect to the vertical guide frame by a telescopic device,
The cutter driving device is mounted so as to protrude above the main frame, and the cutter driving device is mounted on the last frame of the telescopic frame.

In the horizontal moat excavator of the first and second aspects, the cutter driving device is attached to the main frame via a plurality of stages of telescopic frames so that the cutter driving device can protrude upward. By extending the lifting frame and telescopic frame and lifting the cutter drive upward, it is possible to add a normal length cutter piece or a longer cutter piece even if the main frame height is low. Become. In addition, if there is an obstacle in the upper part of the work space, it is possible to move the horizontal moat excavator laterally or by traveling by shrinking the elevating frame or telescopic frame. It can be moved.

According to a third aspect of the present invention, there is provided a horizontal moat excavator according to the first or second aspect, wherein a pin is attached to a bracket attached to the self-propelled truck so as to be adjustable in the front-rear position, and the main frame is moved in the front-rear direction around the pin. A main frame is supported by connecting the main frame and the self-propelled vehicle by a backstay having a hydraulic cylinder.

As described above, the main frame is mounted on the bracket of the self-propelled bogie so as to be tiltable in the front-rear direction on the pin whose position can be adjusted in the front-rear direction, and the main frame is supported by the back stay with the hydraulic cylinder. The main frame can be held in a vertical posture, and fine adjustment of the front-back position can be performed.

According to a fourth aspect of the present invention, there is provided a horizontal moat excavator.
In any of the above, a pin for attaching the main frame to the self-propelled trolley is provided so as to fit in the main frame.

As described above, since the pins for mounting the main frame are housed in the main frame, the mounting position of the main frame can be made closer to the center of the self-propelled bogie, and the overall size of the horizontal moat excavator can be reduced. it can.

[0016]

1A is a side view showing an embodiment of a horizontal moat excavator according to the present invention, and FIG. 1B is a front view thereof. 2 (A) is a plan view of the main frame or the cutter driving device, FIG. 2 (B) is a side view of a connection flange portion of the main frame and the cutter driving device, and FIG. 2 (C) is a partial sectional side view thereof. is there. In FIG. 1A, reference numeral 1 denotes a self-propelled vehicle, and the self-propelled vehicle 1 includes a traveling body 1
A main body (slewing body) 1c is installed on the body a through a swing device 1b. A bracket 3 is attached to a front portion of the main body 1c, and a main frame 4 is attached to the bracket 3 by pins 5 so as to be tiltable in the front-rear direction. Main frame 4
The left and right of the upper part and the rear part of the main body 1c are
The main frame 4 is supported by a backstay 6 having a hydraulic cylinder 6a for maintaining the attitude of the mainframe 4 vertically.

A vertical guide frame 7 is mounted on the main frame 4 so as to be movable in the horizontal direction.
The vertical guide frame 7 is moved laterally by the expansion and contraction of. The hydraulic cylinder 8 has one end connected to the vertical guide frame 7 by a pin 9 and the other end expanded and contracted by sequentially changing the position in the left-right direction by a pin 10 inserted into a pin hole 4 a attached to the main frame 4. The vertical guide frame 7 can be moved from one end of the main frame 4 to the other end. In addition, as the lateral moving device 4, for example, a two-stage telescopic hydraulic cylinder, or a device using a hydraulic motor or the like can be used.

The vertical guide frame 7 has a pair of left and right guide members 11, and a first frame 12a is mounted along the guide members 11 so as to be able to move up and down. First frame 12
a also has a pair of left and right guide members 13,
The second frame 12b is mounted so as to be able to move up and down along 3. These frames 12a and 12b constitute a telescopic frame 12 that can protrude upward from the main frame 4.

Vertical guide frame 7 and first frame 12
and a pair of left and right hydraulic cylinders 14 as a lifting device for raising and lowering the first frame 12a. A hydraulic cylinder 15 is provided between the first frame 12a and the second frame 12b as an elevating device for elevating the second frame 12b. It should be noted that other structures such as a device using a motor and a chain or a winch and a rope can be adopted as the lifting device. Further, as the telescopic frame 12, a three-stage type can be used.

The final frame 1 of the telescopic frame 12
The cutter driving device 16 is attached to 2b. The cutter driving device 16 of the present example drives the August screw type cutter 17 shown in FIG. The August screw-type cutter 17 is provided with each cutter piece 171, 1
A plurality of divided screw-type cutters 17b are attached to each of the 72 frames 17a, and the upper and lower ends of the screw-type cutters 17 are connected or disconnected to add and disassemble. As the cutter, for example, an endless chain type cutter as described in JP-A-7-280043 can be used.

Next, the excavation work by the horizontal moat excavator will be described. As shown in FIG.
Vertical excavation is performed while operating the cutter 17 by the cutter driving device 16 while contracting the telescopic frame 12 by contracting the telescopic frames 4 and 15 and lowering the cutter driving device 16. After lowering to the position, move on to the next cutter piece refilling operation.

When the replenishment operation is performed, the cutter driving device 16 and the cutter piece 17 buried underground are used.
2 and the hydraulic cylinder 15 is extended to raise the second frame 12b, as shown in FIG.
2 and then by a hydraulic cylinder 8 in FIG.
As shown in (B), the cutter driving device 16 is moved to the side of the main frame 4 together with the vertical guide frame 7,
Thereby, the cutter driving device 16 is moved to the cutter piece 17.
2 Evacuate from above.

Next, as shown in FIGS. 4A and 4B, the cutter driving device 16 is raised from the ground to the highest point indicated by H1 by further extending the hydraulic cylinder 14. The height H1 is determined by the distance H2 from the upper end of the cutter piece 172 buried in the ground to the cutter piece connecting portion of the cutter driving device 16,
The height is set to be greater than the length L1 of the lengths 71 to 173 (L1 <H2).

As described above, the cutter driving device 16 is lifted, and the cutter piece 173 to be added is suspended on the cutter piece 172 by the auxiliary crane 19, and the cutter piece 173 is connected to the cutter piece 172.

Subsequently, as shown in FIGS. 5A and 5B,
By returning the cutter driving device 16 to the original position by the hydraulic cylinder 8 and contracting the hydraulic cylinder 14, the connection portion of the cutter driving device 16 is put on and connected to the upper end of the cutter piece 173 that has been added. Then, as described above, vertical excavation is performed while the hydraulic cylinders 14 and 15 are contracted while operating the cutter driving device 16. After such vertical excavation is performed to a predetermined depth, the process proceeds to horizontal excavation.

The horizontal excavation is performed by moving the vertical guide frame 7 along the main frame 4 by operating the hydraulic cylinder 8 and simultaneously moving the cutter driving device 16 up and down. In the case of this side excavation, as shown in FIG. 6, when the hydraulic cylinder 15 is most contracted as shown in FIG. 1 from the height H3 of the cutter driving device 16 in a state where the hydraulic cylinder 15 is fully extended. When the cutter driving device 16 is reciprocated up and down within the range of the height H4 of the cutter driving device 16, a sufficient vertical stroke can be obtained, and only the second frame 12b is moved up and down by the expansion and contraction of the hydraulic cylinder 15. And excavate.

When the cutter driving device 16 is mounted on the main frame 4
, The cutter piece 173 and the cutter driving device 16 are disconnected, the cutter driving device 16 is lifted, and the self-propelled carriage 1 travels, and the hydraulic cylinder 8 is also moved to the starting end side on the main frame 4. And the cutter driving device 16 is connected to the cutter piece 173 again,
Cross excavation is continued by the same operation as described above.

In such a horizontal excavation, the uppermost height of the cutter driving device 16 is set to be substantially equal to or slightly higher than the height of the main frame 4 as shown by H3 in FIG. Accordingly, even when an obstacle such as a pedestrian bridge exists in the upper space of the horizontal moat excavator, horizontal excavation becomes possible, and construction of a continuous wall becomes possible.

FIGS. 7A and 7B are side views showing a horizontal excavator as a comparative example of the present invention in a state where the cutter driving device 16 is at the lowermost position and the uppermost position of the main frame 4, respectively. is there. If the cutter driving device 16 is simply moved up and down on the main frame 4 as in this comparative example, excavation by lateral movement becomes possible even if there is an obstacle such as a pedestrian bridge above, but a cutter piece that can be refilled Is shorter than the difference (H5−H6 = L2) between the height H5 of the cutter driving device 16 at the highest position and the height H6 of the cutter driving device 16 at the lowest position. Only pieces can be replenished, which requires frequent replenishment.

On the other hand, in the case of the present invention, since the telescopic frame 12 is mounted on the main frame 4 so as to be able to move up and down, the cutter driving device 16 can be raised high as shown in FIG. Can,
A normal cutter piece or a cutter piece having a length L1 longer than that can be added. For this reason, the number of additions of cutter pieces in vertical excavation,
The number of disassembly after excavation can be reduced, and work efficiency is improved.

FIG. 8A shows another example of the mounting structure of the main frame 4 to the bracket 3 in the present invention.
A pin 5 for connecting the bracket 3 to the main frame 4 is supported by a bearing 3b slidably mounted along a groove 3a provided in the bracket 3, and the bearing 3b is adjustable in front and rear position by a hydraulic cylinder 3c. This is an example.

When excavation is performed while the cutter 17 is moved laterally, and when the position of the cutter 17 in the vertical direction is slightly deviated from the excavation direction, the expansion and contraction of the hydraulic cylinder 3c and the expansion and contraction of the hydraulic cylinder 6a of the backstay 6 cause the excavation. Cutter 1
Excavation can be performed while adjusting the position of the excavation direction 7 (the distance W1 from the fixture 20 of the bracket 3 to the main frame 4).

On the other hand, in the case of the conventional configuration described above, if it is found that the excavation groove deviates from the design direction during excavation, fine adjustment of the excavation direction is not possible, and the deviation of the excavation direction may cause the deviation of the excavation direction. Since it expands as it progresses, it is necessary to pull out all the cutters 17 to the ground, run the self-propelled bogie, adjust the position of the main frame 4 again, and restart the excavation from the vertical excavation again. If the cutter 1
By enabling the fine adjustment of the position of 7, it is possible to prevent such a situation that the efficiency is reduced.

FIG. 8B shows another example of a structure for attaching the main frame 4 to the bracket 3. Pins 5 for attaching the main frame 4 to the self-propelled carriage are provided so as to fit inside the main frame 4. is there. With this configuration, the distance from the fixture 20 of the bracket 3 to the main frame 4 can be reduced as indicated by W2.
The size can be reduced. As a result, the amount of counterweight for increasing the stability of the self-propelled carriage 1 can be reduced, and the horizontal moat excavator can be manufactured at low cost. In addition, the ground pressure can be reduced, so that the ground can be easily cured.

In the above embodiment, the telescopic frame 12 has a multi-stage telescopic structure. However, the vertical frame is attached to the vertical guide frame 7 in a one-stage telescopic manner by a hydraulic cylinder or the like so as to protrude from above the main frame 4. The cutter driving device 16 may be attached to the lifting frame.

[0036]

According to the first and second aspects of the present invention, an elevating frame or a telescopic frame comprising a plurality of frames is attached to the vertical guide frame so as to protrude above the main frame. Since the cutter driving device is attached to the frame of the step, when a cutter piece is added, the cutter driving device is lifted upward, so that a normal length or longer cutter piece can be added. Therefore, it is possible to reduce the number of refills of the cutter pieces, to replenish the cutter pieces, to shorten the disassembly time, and to perform excavation and disassembly work efficiently.

When there is an obstacle such as a pedestrian bridge in the upper part of the working space, the excavation can be performed by reducing the length of the telescopic frame by moving the horizontal moat excavator or the cutter driving device.

According to the third aspect, in the first or second aspect, the main frame is supported by connecting the main frame and the self-propelled carriage by a back stay having a hydraulic cylinder. It is possible to maintain the posture and finely adjust the front-back position. Therefore, there is no need to adjust the excavation position when the self-propelled truck travels, and the position adjustment work can be performed efficiently.

According to the fourth aspect, in any one of the first to third aspects, the pin for attaching the main frame to the self-propelled carriage is provided so as to fit within the main frame. By placing the main frame inside the frame, the mounting position of the main frame can be made closer to the center of the self-propelled bogie, and the overall size of the horizontal moat excavator can be reduced. Also, as a result,
Since the amount of counterweight for increasing the stability of the self-propelled bogie can be reduced, the Yokobori excavator can be manufactured at low cost, and the ground pressure can be reduced,
The curing of the ground becomes easy.

[Brief description of the drawings]

FIG. 1A is a side view showing an embodiment of a horizontal moat excavator according to the present invention, and FIG. 1B is a front view thereof.

2A is a plan view of a main frame or a cutter driving device according to the present embodiment, FIG. 2B is a side view thereof,
(C) is a partial sectional side view thereof.

FIG. 3A is a side view showing a horizontal moat excavator according to the present embodiment, in which a cutter and a cutter driving device are separated in vertical excavation work, and FIG. 3B is a front view thereof.

FIG. 4A is a side view showing the horizontal moat excavator according to the present embodiment in a state in which cutter pieces are added in a vertical excavation operation, and FIG. 4B is a front view thereof. It is.

FIG. 5A is a side view showing the horizontal moat excavator according to the present embodiment in a state where a cutter driving device is connected to the cutter piece after the addition of the cutter piece in the vertical excavation work;
(B) is a front view thereof.

FIG. 6 is a side view showing a horizontal excavation operation by the horizontal moat excavator according to the embodiment.

FIGS. 7A and 7B show a horizontal moat excavator as a comparative example, respectively, in a state where a cutter driving device is at a lowermost position;
It is a side view which shows about the state in the uppermost position, respectively.

FIGS. 8A and 8B are side views respectively showing another example of the connection structure between the self-propelled carriage and the main frame according to the present invention.

[Explanation of symbols]

1: self-propelled truck, 1a: traveling body, 1b: turning device, 1c:
Main body (revolving body), 3: bracket, 3a: groove, 3b: bearing, 3c: hydraulic cylinder, 4: main frame, 5: pin, 6: back stay, 6a: hydraulic cylinder, 7: vertical guide frame, 8: Hydraulic cylinder, 9, 10: pin, 1
1, 13: guide member, 12: telescopic frame, 12a,
12b: Frame, 14, 15: Hydraulic cylinder, 16:
Cutter driving device, 17: cutter, 17a: frame, 17b: screw type cutter, 171-173: cutter piece

Claims (4)

[Claims] 1. A main frame is mounted on a main body of a self-propelled bogie having a traveling body, a vertical guide frame horizontally moved by a horizontal moving device is mounted on the main frame, and an August screw cutter or endless chain is mounted on the vertical guide frame. A cutter driving device for detachably connecting and driving a type cutter is mounted so as to be able to move up and down, and an auger screw type cutter or an endless chain type cutter is connected to the cutter driving device and driven to raise and lower the cutter and the lateral moving device. In a horizontal moat excavator that performs excavation by lateral movement, a lifting frame that is raised and lowered with respect to the vertical guide frame is attached to the vertical guide frame so as to protrude above a main frame, and the cutter driving device is mounted on the lifting frame. Yokobori excavator characterized by being attached. 2. A main frame is mounted on a main body of a self-propelled carriage having a traveling body, and a vertical guide frame horizontally moved by a horizontal moving device is mounted on the main frame, and an August screw cutter or endless chain is mounted on the vertical guide frame. A cutter driving device for detachably connecting and driving a type cutter is mounted so as to be able to move up and down, and an auger screw type cutter or an endless chain type cutter is connected to the cutter driving device and driven to raise and lower the cutter and the lateral moving device. In a horizontal moat excavator performing excavation by lateral movement, a plurality of telescopic frames that are extended and retracted with respect to the vertical guide frame by the telescopic device and attached to the vertical guide frame so as to protrude above the main frame, The cutter at the last frame of the telescopic frame Yokobori excavator, characterized in that attached to the drive device. 3. The main frame according to claim 1, wherein a pin is attached to a bracket attached to the self-propelled carriage so as to be adjustable in front and rear position, and the main frame is attached to the main frame so as to be tiltable in the front and rear direction about the pin. A horizontal moat excavator wherein a frame and the self-propelled bogie are connected by a backstay having a hydraulic cylinder to support a main frame. 4. A pin according to claim 1, wherein said main frame is attached to said self-propelled vehicle.
A horizontal moat excavator, which is provided so as to fit within the main frame.