JP2001011887A - Horizontal multi-spindle rotary excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excavate a circular arc-shaped trench efficiently to a shape as close as possible to the true circular arc. SOLUTION: A horizontal multi-spindle rotary type excavator 21 of the present invention has frame main bodies 25a, 25b mutually connected together in parallel in a state where a wedge-shaped member 26 is clamped by them. The wedge shaped member 26 is fixed to the frame main body 25b, a mud lifting pipe 6 is arranged to penetrate through the wedge-shaped member 26 in vertical direction, the frame main body 25a is connected by bolt fastening or the like in the configuration, and the frame main body 25a and the frame main body 25b fixed to the wedge-shaped member 26 can be jointed together or disconnected on the job site.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called horizontal multi-axis rotary excavator for excavating ground by rotating a cutter drum.

[0002]

2. Description of the Related Art A horizontal multi-axis rotary excavator that excavates the ground by rotating a cutter drum is widely used mainly for construction work of an underground continuous wall under the name of a hydrophrase excavator. Ground excavator suitable for deep excavation and excavation of rock or hard ground.

FIG. 6 is an overall side view showing the horizontal multi-shaft rotary excavator 1 suspended by a crane 4, and FIG. 7 is a front view.

The horizontal multi-shaft rotary excavator 1 shown in FIG.
A pair of hydraulic rotary cutters 3 and 3 that rotate in opposite directions are provided at the lower end of the main body frame 2.

In the horizontal multi-spindle rotary excavator 1, the rotary cutters 3, 3 are rotated in the direction of the arrow in FIG. While excavating the bottom surface, the excavated earth and sand is sucked up together with the stabilizing liquid in an area sandwiched between the rotary cutters 3, and the excavated earth and sand is carried out to the ground via a mud pipe 6 provided in the main body frame 2.

[0006]

Here, in the case where the trench 5 is to be formed in an arc shape, when the horizontal multi-axis rotary excavator 1 is hung at each position shown in FIG. The tapered uncut residue 11 remains. For this reason, excavation has to be performed as shown in FIG. 1 (b). However, this method has a problem that the excavation area has to be overlapped little by little at the end, so that the excavation efficiency is reduced. In addition, the whole shape excavated in either method becomes polygonal, and there is a problem that it does not become an arc. Such a problem becomes more prominent as the curvature of the arc increases.

The present invention has been made in view of the above circumstances, and provides a horizontal multi-axis rotary excavator capable of efficiently excavating an arc-shaped trench in a shape as close to an arc as possible. With the goal.

[0008]

In order to achieve the above object, a horizontal multi-axis rotary excavator according to the present invention has a plurality of frame bodies each having a rotary cutter attached to a lower end thereof. Are connected in parallel with a predetermined wedge-shaped member sandwiched therebetween.

[0009] In the horizontal multi-shaft rotary excavator according to the present invention, an auxiliary excavation mechanism for excavating an unexcavated portion of the rotary cutter is protruded from a lower surface of the wedge-shaped member.

In the horizontal multi-shaft rotary excavator according to the present invention, a plurality of frame bodies each having a rotary cutter attached to a lower end thereof are hinged in parallel, and an angle adjustment for adjusting an opening angle of the pair of frame bodies. It has a mechanism.

In the horizontal multi-shaft rotary excavator according to the first aspect, since the plurality of frame bodies are interconnected in parallel with the wedge-shaped members being sandwiched therebetween, the plurality of frame bodies are in the same vertical plane. However, they are arranged so as to close in an arc shape according to the size of the wedge angle of the wedge-shaped member.

Therefore, when the trench is to be excavated in an arc shape, if the wedge angle of the wedge-shaped member is adjusted to the curvature of the arc, the ends of the respective frame bodies are aligned in the radial direction of the arc. There is no concern that tapered digging remains.

Although the number of connection of the frame bodies is arbitrary, typically, a conventional type is divided into two, that is, two frame bodies each having a width about half that of the conventional type are connected. It is conceivable to configure.

The structure of the wedge-shaped member is arbitrary. For example, it is conceivable that the wedge-shaped member is formed in a triangular prism shape using a steel frame material. It is not necessary to have a length equal to the machine length of the frame main body. For example, a frame having a length of several meters may be intermittently interposed at several locations at the upper end, the middle, and the lower end of two adjacent frame main bodies. Needless to say, it is better to prepare a large number of wedge-shaped members having various wedge angles.

The rotary cutter is installed independently at the lower end of each frame main body, that is, a pair of rotary cutters provided at the lower end of a conventional horizontal multi-shaft rotary excavator are separately installed on each frame main body. However, this is not the case when the width of the frame body can be made large, that is, when the arc curvature is small.

In order to interconnect a plurality of frame bodies in parallel with the wedge-shaped members sandwiched therebetween, it is conceivable to adopt a structure in which the frame bodies can be detachably connected by, for example, bolts. It is also conceivable that, of the two adjacent frame bodies, one frame body is fixed and the other frame body is detachable.

Here, the more the two adjacent frame bodies are closed, the higher the possibility that an undigged portion is generated below the wedge-shaped member. In such a case, the uncut portion of the rotary cutter is excavated. An auxiliary excavation mechanism may be provided so as to protrude from the lower surface of the wedge-shaped member. According to such a configuration, it is possible to prevent the occurrence of undigging between the rotary cutters as described above.

In the horizontal multi-shaft rotary excavator according to the second aspect, the plurality of frame bodies are hinged in parallel, and their opening angles are maintained at values determined by the angle adjusting mechanism. Therefore, the plurality of frame bodies are not arranged on the same vertical plane, but are arranged in an arc shape according to the opening angle determined by the angle adjusting mechanism.

Therefore, when the trench is to be excavated in an arc shape, if the opening angle of the frame body is adjusted by operating the angle adjusting mechanism so as to match the curvature of the arc,
The ends of the frame bodies are aligned in the radial direction of the circular arc, so that there is no concern that a tapered digging remains as in the related art.

The points to be noted regarding the number of connected frame bodies and the arrangement of the rotary cutter are the same as those of the first aspect of the present invention, but the description thereof is omitted here.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a horizontal multi-shaft rotary excavator according to the present invention will be described below with reference to the accompanying drawings. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.

(First Embodiment)

FIGS. 1 and 2 are a plan view and a development view of the horizontal multi-shaft rotary excavator according to the first embodiment, respectively, as seen from the direction of the line AA. As can be seen from these figures, the horizontal multi-axis rotary excavator 21 according to the present embodiment has a wire 24 in which two frame bodies 25 a and 25 b each having a rotary cutter 3 attached to a lower end thereof are wound around a wire sheave 23. And is suspended by a crane 4 (not shown).

Here, the frame bodies 25a, 25b are
As can be clearly seen from FIG. 1, the wedge-shaped members 26 are interconnected in parallel while being sandwiched. The wedge-shaped member 26 is formed to have a length substantially equal to the machine length of the frame main bodies 25a and 25b, and can be configured as a triangular prism-shaped assembly column using a steel frame material, for example.

On the other hand, a mud pump 30 is provided below the frame body 25b so that the earth and sand excavated by the rotary cutters 3 and 3 can be sucked up to the ground via the suction port 31 and the mud pipe 6 together with the stabilizing liquid. It has become.

Here, the wedge-shaped member 26 is
5b, and the above-mentioned mud pipe 6 is arranged to penetrate vertically in the wedge-shaped member 26,
The frame main body 25a is configured to be connected to the frame main body 25a by bolting or the like, so that the frame main body 25a and the frame main body 25b to which the wedge-shaped member 26 is fixed can be connected or disassembled on site. It has become.

The rotary cutters 3 and 3 are configured to rotate in opposite directions, as in the prior art. The frame main bodies 25a and 25b include a correcting mechanism 27 for correcting the upper end positions thereof, a correcting mechanism (not shown) for correcting a direction orthogonal thereto, and a correcting mechanism 28 for correcting the lower end position of the frame. And a correction mechanism 29 for performing correction in a direction perpendicular to the frame main body 25.
The postures of a and 25b can be corrected.

The horizontal multi-shaft rotary excavator 2 according to this embodiment
In FIG. 1, since the frame bodies 25a and 25b are interconnected in parallel with the wedge-shaped members 26 being sandwiched therebetween, the frame bodies are not arranged in the same vertical plane as is well understood in FIG. 26 are arranged so as to close in an arc shape according to the size α of the wedge angle.

Therefore, when the trench is to be excavated in an arc, if the wedge angle of the wedge-shaped member 26 is adjusted to the curvature of the arc, the ends 32, 32 of the frame bodies 25a, 25b are aligned in the radial direction of the arc. As a result, there is no longer a concern that a tapered digging residue occurs as in the related art.

As described above, according to the horizontal multi-shaft rotary excavator 21 according to the present embodiment, the frame body 25
Since the wedge-shaped member 26 is sandwiched between a and 25b, the frame main body is closed in accordance with the size α of the wedge angle of the wedge-shaped member 26, and thus a tapered uncut portion is generated as in the related art. Without this, it becomes possible to efficiently excavate an arc-shaped trench corresponding to the wedge angle α of the wedge-shaped member 26.

Further, in the prior art, a circular trench is formed by excavation as an N-sided trench, but according to the present embodiment, a trench can be formed by excavation as a 2N-sided trench without changing the total number of guts. A trench having a more circular shape can be formed without any reduction in excavation efficiency.

Although not particularly mentioned in the present embodiment, the more the two adjacent frame bodies 25a and 25b are closed, the more likely that a portion left undigged below the wedge-shaped member 26 is generated.

In such a case, as shown in FIG. 3, an auxiliary excavating mechanism 41 is protruded from the lower surface of the wedge-shaped member 26, and a rotating shaft of the auxiliary excavating mechanism is built in an internal space below the wedge-shaped member 26. What is necessary is just to connect to the rotating shaft of 42. The auxiliary excavation mechanism 41 can be configured by, for example, protruding a large number of excavation bits on a conical peripheral surface.

According to such a configuration, since the auxiliary excavating mechanism 41 excavates the space between the rotary cutters 3 and 3, it is possible to prevent the unexcavated portion from being generated in the space. Note that the same reference numerals in FIG. 3 denote the same parts as those in the above-described embodiment, and a detailed description thereof will be omitted here.

(Second Embodiment)

FIG. 4 is a plan view and a partial perspective view of a horizontal multi-axis rotary excavator according to a second embodiment, and FIG.
It is the development view seen from the line direction. As can be seen from these figures, the horizontal multi-shaft rotary excavator 51 according to this embodiment is also the first excavator.
As in the embodiment, the two frame bodies 25a and 25b each having the rotary cutter 3 attached to the lower end thereof are suspended by a crane 4 (not shown) via a wire 24 wound around a wire sheave 23. Then
The frame bodies 25a and 25b are joined in parallel via a hinge 53, and include an angle adjusting mechanism 52 for adjusting the opening angle of the pair of frame bodies.

The angle adjusting mechanism 52 can be constituted by a hydraulic actuator as shown in FIG.

On the other hand, similarly to the first embodiment, a mud pump 30 is provided below the frame main body 25b. The mud pipe 6 is vertically arranged in a wedge-shaped hollow space sandwiched between the frame main bodies 25a and 25b.

The construction and operation and effects of the correction mechanisms 27 to 29 provided on the rotary cutters 3 and 3 and the frame bodies 25a and 25b are the same as those of the first embodiment, and therefore the description thereof is omitted here.

The horizontal multi-shaft rotary excavator 5 according to this embodiment
In 1, the two frame bodies 25 a and 25 b are hinged in parallel, and their opening angle is maintained at a value determined by the angle adjustment mechanism 52. Therefore, the frame bodies 25a and 25b are not arranged on the same vertical plane as is well understood in FIG. 4, but are arranged in an arc shape according to the opening angle β determined by the angle adjusting mechanism 52.

Therefore, when the trench is to be excavated in an arc shape, if the opening angle β of the frame main bodies 25a, 25b is adjusted by operating the angle adjusting mechanism 52 so as to match the curvature of the arc, the frame main bodies 25a, 25b End portions 32, 32 are aligned in the radial direction of the circular arc, so that there is no concern that a tapered digging residue occurs as in the related art.

As described above, according to the horizontal multi-shaft rotary excavator 51 according to the present embodiment, the frame body 25
a and 25b are hinged in parallel and the opening angle β is maintained at a value determined by the angle adjustment mechanism 52, so that the frame body is closed according to the opening angle β determined by the angle adjustment mechanism 52. Thus, an arc-shaped trench corresponding to the opening angle β can be efficiently excavated without generating a tapered undigged portion unlike the related art.

Further, in the prior art, a circular trench was excavated and formed as an N-sided trench, but according to the present embodiment, a trench can be excavated and formed as a 2N-sided trench without changing the total number of guts. A trench having a more circular shape can be formed without any reduction in excavation efficiency.

[0044]

As described above, according to the horizontal multi-axis rotary excavator of the present invention, the frame body is closed according to the size of the wedge angle of the wedge-shaped member.
Thus, it is possible to efficiently excavate an arc-shaped trench corresponding to the wedge angle of the wedge-shaped member without generating a tapered uncut portion as in the related art.

Further, according to the horizontal multi-axis rotary excavator according to the second aspect of the present invention, there is an effect that it is possible to prevent the occurrence of undigging between rotary cutters.

Further, according to the horizontal multi-axis rotary excavator of the present invention, the frame body is closed according to the opening angle determined by the angle adjusting mechanism, and thus the taper is different from the conventional one. It is possible to efficiently excavate an arc-shaped trench corresponding to the opening angle without generating an uncut excavation.

[0047]

[Brief description of the drawings]

FIG. 1 is a plan view of a horizontal multi-axis rotary excavator according to a first embodiment.

FIG. 2 is a development view of the same seen from the line AA.

FIG. 3 is a development view of a horizontal multi-axis rotary excavator according to a modification of the first embodiment.

FIGS. 4A and 4B are diagrams of a horizontal multi-axis rotary excavator according to a second embodiment, wherein FIG. 4A is a plan view and FIG. 4B is a frame main body 25a, 25;
The partial perspective view near the upper end of b.

FIG. 5 is an exploded view of the same seen from the line BB.

FIG. 6 is a layout view of a horizontal multi-shaft rotary excavator according to the related art.

FIG. 7 is a front view of the same.

FIG. 8 is a plan view showing the state of excavation.

[Explanation of symbols]

 Reference Signs List 3 rotary cutter 6 mud pipe 21, 51 horizontal multi-axis rotary excavator 25a, 25b frame body 26 wedge-shaped member 41 auxiliary excavating mechanism 52 angle adjusting mechanism 53 hinge

Claims (3)

[Claims] 1. A horizontal multi-axis rotary excavator wherein a plurality of frame bodies each having a rotary cutter attached to a lower end thereof are interconnected in parallel with a predetermined wedge-shaped member sandwiched therebetween. 2. The horizontal multi-shaft rotary excavator according to claim 1, wherein an auxiliary excavation mechanism for excavating an unexcavated portion of the rotary cutter protrudes from a lower surface of the wedge-shaped member. 3. A horizontal multi-purpose device comprising: a plurality of frame bodies each having a rotary cutter attached to a lower end thereof hinged in parallel; and an angle adjusting mechanism for adjusting an opening angle of the plurality of frame bodies. Shaft excavator.