JP2017002578A - Ground excavation machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground excavation machine capable of accurately positioning an excavation machine body to excavate the ground when constructing a wall-like structure in the ground of a narrow work area with a limited overhead clearance.SOLUTION: An excavation machine body 2 is installed on an excavation machine body traveling frame 5. A sheave 8 to guide a wire to suspend the excavation machine body 2 is installed above the excavation machine body traveling frame 5 through a horizontal position control device 9. The horizontal position control device 9 moves the sheave 8 in a traveling direction of the excavation machine body traveling frame 5 and a direction orthogonal thereto.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a ground excavator used when building a wall-like structure in the ground of a low-headed and narrow work area.

  As a ground excavator used when building a wall-like structure such as an underground continuous wall, a water blocking wall, a retaining wall, or a structure foundation in the ground of a low-altitude and narrow work area, for example, A low-head continuous wall excavator is disclosed.

  The low empty head continuous wall excavator of Cited Document 1 is equipped with a drilling unit that has a drum-like cutter that is excavated by rotation and a drive source that rotationally drives the cutter in a frame unit for an excavating unit that has a caster attached to the lower end. To do. A frame unit on which a reel unit having at least a power unit for driving a drive source, a power cable reel for winding and unwinding a power cable, and a control cable reel for winding and unwinding a control cable are mounted on a crawler. To be installed.

  By separating the excavation unit from the power unit and the reel unit in this way, the work area including the excavation target position is a narrow area where a conventional ground excavator integrally mounting the excavation unit, the power unit and the reel unit cannot enter. However, excavation work can be carried out by carrying in at least a frame unit carrying the excavation unit.

JP 2000-282506 A

  However, in the low-headed continuous wall excavator of Cited Reference 1, the frame unit for the excavation unit is carried into the excavation target position, and the excavation unit is positioned to adjust the position of the unit frame by turning the casters and sliding in the lateral direction. After the operation, the out-triggered state is held by the outrigger.

  Thus, when adjusting the position of the excavating unit unit frame in a grounded state, after moving the frame unit in the plane X direction, for example, the caster is rotated 90 degrees around the vertical axis to move in the plane Y direction. If it tries to do so, the position of the unit frame is likely to be displaced with the rotation of the casters, and it is difficult to position the excavation unit with high accuracy, and the positioning operation is complicated.

  Therefore, after moving in the plane X direction, the unit frame for the excavation unit is raised by jacking up, for example, and the caster is rotated 90 degrees around the vertical axis and then grounded again and moved in the plane Y direction. Is also possible. However, jacking up each time the caster is rotated in the direction in which the unit frame is desired to move requires a great amount of labor and work time.

  The present invention has been made in view of such problems, and its main purpose is to position the excavator body for excavating the ground in constructing a wall-like structure in the ground of a low-altitude and narrow work area. The object is to provide a ground excavator capable of carrying out with high precision.

  To achieve this object, the ground excavator of the present invention is a ground excavator for constructing a wall-like structure in the ground, and includes a pair of rotary cutters at the lower end and a drive for driving the rotary cutters. An excavator body mounted with a power source, a power unit that drives a drive source that drives the rotary cutter, a reel unit that includes a wire reel around which a wire for suspending the excavator body is wound, and the excavation The excavator main body traveling frame that includes the main body of the excavator is provided, and a sheave for guiding the wire fed from the wire reel is installed on the upper portion of the excavator main body traveling frame via a planar position adjusting device. The planar position adjusting device includes a moving means for moving the sheave in a traveling direction and a traveling orthogonal direction of the traveling frame for the excavator body. To.

  According to the above ground excavator, the excavator main body can be positioned via the planar position adjustment device after the excavator main body traveling frame is carried to the excavation target position, so that the excavator is in a grounded state. Compared to positioning the excavator body by adjusting the installation frame of the main body, not only the workability is greatly improved, but also the accuracy is improved and the time required for positioning is greatly shortened. It becomes possible.

  In the ground excavator of the present invention, the excavator body is provided with a lifting mud pump, and a lifting mud hose reel around which the lifting mud hose connected to the lifting mud pump is wound is provided in the reel unit, The power unit is installed in the power unit travel frame, and the reel unit is installed in the reel unit travel frame.

  According to the above ground excavator, the excavator main body and other equipment are separated from each other, and only the excavator main body needs to be mounted on the excavator main body travel frame, so that the excavator main body travel frame can be made compact. Even in a low-altitude and narrow work area, it is possible to carry out excavation work by carrying only the excavator body travel frame into the excavation target position.

  ADVANTAGE OF THE INVENTION According to this invention, when constructing | assembling a wall-like structure in the ground of a low sky head and a narrow work area, it becomes possible to position an excavator main body accurately and in a short time.

It is a figure which shows the side of a ground excavator. It is a figure which shows the plane of a ground excavator. It is a figure which shows the detail of the plane position adjustment apparatus with which the ground excavator was equipped.

Below, the ground excavator of this invention is demonstrated using FIGS. 1-3.
The ground excavator 1 is used when building a wall-like structure such as an underground continuous wall, a water blocking wall, a retaining wall, and a structure foundation in the ground of a low-altitude and narrow work area. As shown in FIG. 1, an excavator body 2, a reel unit 3, and a power unit 4 are provided.

  The excavator main body 2 includes a pair of rotary cutters 22 arranged in a horizontal direction on the lower surface of a rectangular parallelepiped main body frame 21 and a drive source 23 for driving the rotary cutter 22. Further, the main body frame 21 includes a mud pump 24 for lifting the excavated shear generated by excavation by the rotary cutter 22 together with a stabilizing liquid, and a plurality of posture correcting devices 25 for controlling the posture of the excavator main body 2. It has.

  The reel unit 3 includes a wire reel 31 around which a wire 10 for suspending the excavator main body 22 is wound, and a lifting mud hose around which a lifting mud hose 11 connected at one end to a lifting mud pump 24 is wound. A reel 32 is provided.

  The power unit 4 includes a power unit 41 including a prime mover and a hydraulic unit for driving the drive source 23, the mud pump 24 and the attitude correction device 25 described above, a power cable reel 42 around which the power cable 12 is wound, and a hydraulic hose. 13 is provided with a hydraulic hose reel 43 on which 13 is wound.

  In the present embodiment, the ground excavator 1 includes three traveling frames, and the excavator body 2, the reel unit 3, and the power unit 4 are installed in separate traveling unit frames. Specifically, the excavator body 2 is mounted on the excavator body travel frame 5, the reel unit 3 is mounted on the reel unit travel frame 6, and the power unit 4 is mounted on the power unit travel frame 7. Is possible.

  In the present embodiment, not only the excavator body 2 but also the reel unit 3 and the power unit 4 can be individually conveyed, but the present invention is not necessarily limited thereto. The reel unit 3 and the power unit 4 may be installed on the same traveling frame as long as only the excavator body 2 can be conveyed separately.

  In the ground excavator 1 having the above-described configuration, the excavator main body traveling frame 5, the reel unit traveling frame 6, and the power unit traveling frame are used even when the work area 14 is a bent narrow space as shown in FIG. 7 can be carried to the vicinity of the excavation target position. If the excavator body traveling frame 5 can be carried into at least the excavation target position, the reel unit traveling frame 6 and the power unit traveling frame 7 do not necessarily have to be carried to the vicinity of the excavation target position.

  That is, the travel frame 6 for the reel part and the travel frame 7 for the power part are within the range in which the wire 10, the mud hose 11, the power hose 12, and the hydraulic hose 13 reach the excavator body 2. It may be arranged at any position. Thereby, the ground excavator 1 can construct excavation grooves to construct a wall-like structure in the ground even in a narrow work area.

  Further, the excavator body 2 is suspended via a wire 10 guided by a sheave 8 installed on the upper part of the excavator body traveling frame 5 as shown in FIG. The wire 10 can be freely moved in the vertical direction by winding or unwinding the wire 10. Thereby, even if the work area 14 is a low head space, the excavator main body 2 can construct excavation grooves in the ground.

  By the way, the excavator body traveling frame 5, the reel unit traveling frame 6 and the power unit traveling frame 7 are all configured to be able to travel by casters 51, 61 and 71 having stoppers installed at the lower ends. Yes. In such a case, the excavator main body traveling frame 5 equipped with the excavator main body 2 is installed in the grounding state after the excavator main body traveling frame 5 is carried into the excavation target position in the work area 14. It is not easy to position the excavator body 2 by adjustment.

  Therefore, in the present embodiment, as shown in FIG. 3, the planar position adjusting device 9 is installed on the upper part of the excavator body traveling frame 5, and the sheave 8 for guiding the wire 10 is installed on the planar position adjusting device 9. ing. Then, by adjusting the planar position of the sheave 8 by the planar position adjusting device 9, the excavator body 2 is positioned without moving the excavator body travel frame 5 after being installed to the excavation target position.

  As shown in the plan view of FIG. 3 (a) and the side view of FIG. 3 (b), the planar position adjusting device 9 is mounted on the lower girder 91 installed on the upper surface of the excavator body traveling frame 5 and on the upper part thereof. An intermediate girder 92 that is placed and an upper girder 93 that is placed on top of the intermediate girder 92 are provided, and the sheave 8 is installed in the upper girder 93. Further, as shown in FIG. 3A, between the lower beam 91 and the intermediate beam 92, a traveling orthogonal direction jack 94 that extends and contracts in the traveling orthogonal direction of the excavator body traveling frame 5 is connected to the intermediate beam 92. Between the upper girders 93, traveling direction jacks 95 that extend and contract in the traveling direction of the excavator body traveling frame 5 are respectively installed. In the present embodiment, the traveling direction of the excavator main body traveling frame 5 means that the rotary cutter 22 of the excavator main body 2 mounted on the excavator main body traveling frame 5 excavates as shown in FIG. A direction that sometimes rotates.

  The lower girders 91 are fixed to the excavator body travel frame 5 so that a pair of the lower girders 91 are spaced apart and extend in the travel orthogonal direction of the excavator body travel frame 5 as shown in FIG. ing. The intermediate girders 92 are placed on the lower girders 91 such that a pair of the intermediate girders extends in the running direction of the excavator body running frame 5 with a gap therebetween, and the intermediate girders 92 are located above the lower girders 91. They are connected via a spacing member 921 arranged.

  And the traveling orthogonal direction jack 94 installed between the lower girder 91 and the middle girder 92 is fixed to a convex member 911 having one end protruding in a horizontal direction from the lower girder 91 and the other end is intermediate. It is fixed to a drooping member 922 depending from the girder 92. As a result, the pair of intermediate girders 92 moves in the running orthogonal direction on the lower girders 91 as the running orthogonal direction jack 94 expands and contracts while maintaining the interval.

  Further, as shown in FIG. 3 (a), the upper girders 93 are placed on the intermediate girders 92 so as to extend in the running orthogonal direction of the excavator body running frame 5 with a pair therebetween. The upper girders 93 are connected to each other via a spacing member 931 that extends in parallel with the intermediate girders 21 and that is disposed inside the pair of intermediate girders 92.

  The traveling direction jack 95 installed between the upper girder 93 and the intermediate girder 92 has one end fixed to the side surface 932 of the upper girder 93 and the other end as shown in FIG. The portion is fixed to a convex member 923 that protrudes upward from the intermediate beam 92. Therefore, the pair of upper girders 93 moves in the running direction on the intermediate girders 92 as the running direction jack 95 expands and contracts while maintaining the interval.

  Thereby, since the sheave 8 installed in the upper girder 93 of the planar position adjusting device 9 can be freely moved in the traveling direction and the traveling orthogonal direction of the excavator body traveling frame 5, along with this, The excavator body 2 suspended by the wire 10 guided by the sheave 8 can also be moved in the travel direction and the travel orthogonal direction of the excavator body travel frame 5.

In this embodiment, in order to suspended the excavator main body 2 has been placed three sheaves 8 in planar position adjustment device 9, the quantity is not necessarily limited thereto.

  Moreover, although illustration was abbreviate | omitted, it cannot be overemphasized that the sheave which guides the mud hose 11, the power hose 12, and the hydraulic hose 13 is installed in the plane position adjustment apparatus 9. FIG.

  Further, the excavator main body traveling frame 5 fixes the excavator main body traveling frame 5 on the ground with a stopper provided on the caster 51 when the planar position adjusting device 9 is operated and when the excavator main body 2 excavates the ground. It is good to keep.

  According to the planar position adjusting device 9 described above, the excavator main body 2 is not only easily positioned at the excavation target position in the work area 14, but also the excavator main body 2 is installed in a pilot hole provided in the ground. Thereafter, the inclination of the excavator body 2 with respect to the vertical axis can be finely adjusted so that the mouth protection tube generally installed at the pilot hole mouth and the excavator body 2 are coaxial.

  The ground excavator 1 of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the present embodiment, the excavator body traveling frame 5, the reel unit traveling frame 6 and the power unit traveling frame 7 all travel on the ground by casters 51, 61 and 71 installed at the lower end. However, the present invention is not necessarily limited to this, and a guide rail may be placed on the ground, and the casters 51, 61, 71 may travel on the guide rail.

  Further, in the present embodiment, the casters 51, 61, 71 are provided with stoppers. However, the present invention is not necessarily limited to this, and the excavator body travel frame 5, the reel unit travel frame 6, and the power unit travel are not limited thereto. It is good also as a structure which provides an outrigger in each flame | frame 7 and makes these stand still on the ground.

  Furthermore, the traveling mechanisms of the excavator body traveling frame 5, the reel unit traveling frame 6 and the power unit traveling frame 7 are not necessarily limited to the casters 51, 61 and 71, and the traveling frame described above is allowed to travel. Any crawler or the like may be used as long as it can travel.

DESCRIPTION OF SYMBOLS 1 Ground excavator 2 Excavator main body 21 Main body frame 22 Rotary cutter 23 Drive source 24 Mud pump 25 Attitude correction device 3 Reel part 31 Wire reel 32 Mud hose reel 4 Power part 41 Power unit 42 Power cable reel 43 Hydraulic hose reel 5 excavator main body traveling frame 51 caster 6 reel unit traveling frame 61 caster 7 power unit traveling frame 71 caster 8 sheave 9 plane position adjusting device 91 lower girder 911 convex member 92 intermediate girder 921 interval holding member 922 hanging member 923 convex Member 93 Upper girder 931 Spacing member 932 Side surface 94 Traveling orthogonal direction jack 95 Traveling direction jack 10 Wire 11 Lifting hose 12 Power hose 13 Hydraulic hose 14 Working area

Claims (2)

A ground excavator for constructing a wall-like structure in the ground,
Excavator body equipped with a pair of rotary cutters at the lower end and a drive source for driving the rotary cutters;
A power unit that drives a drive source that drives the rotary cutter;
A reel unit comprising a wire reel around which a wire for suspending the excavator body is wound;
A traveling frame for an excavator body that encloses the excavator body,
A sheave for guiding the wire fed out from the wire reel is installed on the upper part of the traveling frame for the excavator body via a plane position adjusting device,
The ground excavator is provided with a moving means for moving the sheave in a traveling direction and a traveling orthogonal direction of the excavator body traveling frame. The ground excavator according to claim 1,
The excavator body is provided with a mud pump, and the reel unit is provided with a mud hose reel around which a mud hose connected to the mud pump is wound,
The ground excavator characterized in that the power unit is installed in a power unit traveling frame and the reel unit is installed in a reel unit traveling frame.

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