JPH09195269A - Wall surface chipping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce irregularities generated on a chipping surface to uniformly finish the surface as much as possible, and prevent an excessive chipping. SOLUTION: A wall surface chipping machine 11 is formed of a mounting bracket 12 mounted on a base machine such as back hoe; a drum supporting bracket 13 fixed to the opposite side to the mounting bracket 12; a rotating drum 14 rotatably supported by the drum supporting bracket 13 and connected to the driving shaft of a prescribed rotation driving mechanism 3; and a plurality of drum cutters 15 protruded on the circumference of the rotating drum 14. The drum cutter 15 is arranged on the rotating drum 14 in such a manner that the rotating radius on the tip of each drum cutter 15 is substantially equal to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall surface chipping machine for hanging a wall surface of a continuous underground wall.

[0002]

2. Description of the Related Art The underground continuous wall construction method excavates a continuous groove in the ground while preventing the collapse of the ground, and constructs a wall such as reinforced concrete in it to construct a water stop wall, earth retaining wall, structural wall, Although it is a construction method that can be used for piles and the like, the technique of joining the constructed underground continuous wall to the structure body to construct a composite wall is also often used.

When constructing a synthetic wall, it is necessary to scrape and flatten the wall surface of the underground continuous wall in order to increase the adhesion strength between the underground continuous wall and the main body. A wall chipping machine 1 called a twin header developed for tunnel excavation as shown in 4 was attached to a backhoe 2 which is a base machine.

As shown in FIG. 5, the wall scraping machine 1 has a large number of drum cutters 5 as cutting tools projecting around a pair of symmetrically arranged drums 4 and 4, and the drums 4 and 4 are also provided. The drive shaft of the hydraulic motor 3 is connected to
By rotating the drums 4 and 4 by the hydraulic motor 3, the concrete wall surface can be mounted by the drum cutter 5.

If the wall scraping machine 1 is operated while the arm of the backhoe 2 is moved up and down or turned, a wide range of concrete wall surfaces can be hung in a short time.

[0006]

However, in the conventional wall chipping machine 1, as shown in FIG. 5, since the drum cutters 5 are radially mounted around the drum 4, the line 6 connecting the cutting edges thereof is not provided. It becomes a barrel shape bulging in the center. Therefore, as can be seen from the problem that the chipping surface does not become a flat surface and severe unevenness is generated, and the line 6 of the cutting edge is curved at the corner, the drum cutter 5 does not reach the entering corner part, so There was a problem that he could not climb.

In addition, it is difficult for the conventional wall chipping machine 1 to control the chipping, and it is effective for rough cutting the convex part that largely protrudes to the outside. However, the wall surface of the underground continuous wall is accurately flattened to the inner wall. There was a limit to the accuracy when trying to increase the adhesion to and, and it was possible to damage the rebar in the wall due to excessive lifting.

The present invention has been made in consideration of the above-mentioned circumstances, and an object thereof is to provide a wall surface chipping machine capable of reducing unevenness on the chipping surface and finishing as evenly as possible, and preventing excessive chipping. To do.

[0009]

In order to achieve the above object, the wall chipping machine of the present invention has a mounting bracket to be mounted on a base machine such as a backhoe, and a mounting bracket of the mounting bracket, as set forth in claim 1. A drum support bracket fixed to the opposite side, a rotary drum rotatably supported by the drum support bracket and connected to a drive shaft of a predetermined rotary drive mechanism, and a plurality of protrusions provided around the rotary drum. In the wall chipping machine composed of the drum cutter, the drum cutters are arranged on the rotary drum so that the turning radii at the tips of the respective drum cutters are substantially the same.

Further, in the wall chipping machine of the present invention, a cutting edge preventing member is detachably attached near the drum supporting bracket.

In the wall chipping machine of the present invention, since the turning radii at the tips of the drum cutters, that is, at the cutting edges are substantially the same, when the rotating drum is rotated, the locus drawn by the cutting edges becomes a cylindrical surface. Therefore, the chipped surface has less unevenness, and the wall surface can be cut so as to remove the thin skin.

Further, since the blade biting prevention member is detachably attached near the drum supporting bracket, when the chipping depth reaches a certain size, the blade biting prevention member is pressed against the wall surface to serve as a stopper, Excessive chipping is prevented in advance.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a wall chipping machine 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.

FIG. 1 is a wall surface chipping machine 1 according to the present embodiment.
1 is a side view and a plan view of FIG. As can be seen from these figures, the wall chipping machine 11 is a mounting bracket 1 that is mounted on a base machine such as a backhoe.
2, a pair of drum supporting brackets 13 and 13 fixed to the mounting bracket 12, a pair of rotating drums 14 and 14 rotatably supported by the drum supporting brackets 13 and 13, and the rotating drum It is generally composed of a plurality of drum cutters 15 projecting from the circumference of 14, 14.

Two mounting holes are formed in the mounting bracket 12, and the wall chipping machine 11 can be swung freely by operating the base machine by mounting the ends of the arms of the base machine into these holes. .

The drum supporting brackets 13, 13 are fixed to the mounting bracket 12 by bolts or the like on the side opposite to the mounting side of the base machine.

The rotating drums 14 and 14 are cylindrical members which are arranged substantially symmetrically at positions where the drum supporting brackets 13 and 13 are sandwiched, and the rotating shafts (not shown) of them are rotational driving mechanisms. It is connected to the drive shaft of a hydraulic motor 3. Further, the drum supporting brackets 13, 13
A head portion 19 of the hydraulic motor 3 is arranged in between, and a reducer 18 is built in the head portion 19. The drive shaft of the hydraulic motor 3 is connected to the rotary shaft of the rotary drum 14 via the speed reducer 18.

The drum cutter 15 comprises a holder 17 fixed to the peripheral surface of the rotary drum 14 by welding or the like and a cutter tooth 16 inserted in the holder 16, and the radius of rotation at the tip of the cutter tooth 16 is substantially equal. Rotate the drum cutter 15 to the rotary drum 14 so that they are the same.
It is arranged in. As the holder 17 and the cutter teeth 16, for example, those for a hydro phrase excavator can be diverted.

The rotary drum 1 of the drum cutter 15
The arrangement method on 4 and 14 may be appropriately determined in consideration of cutting efficiency and the like, and as shown in the figure, for example, the arrangement may be such that one surface is cut into two rows.

On the other hand, a cutting edge preventing member 20 is attached to the head portion 19. Cutting edge prevention member 20
For example, a steel material having a box cross section of, for example, a width of about 100 mm is curved into a substantially semicircular shape so as to be in close contact with the head portion 19, and reinforcing ribs 22 are provided at several positions in the middle thereof. Further, the bite-in prevention member 20 has bolt holes 21 formed at both ends thereof, and the bolt holes 21 can be detachably joined to the head portion 19 by bolts.

Here, since the difference between the outer peripheral plate surface of the bite prevention member 20 and the tip position of the drum cutter 15 is the upper limit of the chip depth, several types of bite prevention members 20 having different height sizes should be prepared. For example, the chipping depth can be set according to the situation by appropriately replacing the bite prevention member 20. In addition, it is preferable to set the chip depth to about 50 mm as an upper limit.

In the wall chipping machine 11 of the present embodiment, when the rotary drums 14, 14 are rotated, the locus of the blade edge becomes a cylindrical surface, and therefore the chipping surface has less irregularities so that thin skin can be peeled off. It becomes possible to cut the wall surface.

If the inner corner of the underground wall is to be cut, the wall chipping machine 1 is placed at the position shown in FIG. 2 (a).
1 may be arranged and the rotary drums 14, 14 may be rotated.

When the depth of chipping reaches a certain level, the cutting edge preventing member 20 for the cutting edge hits the wall surface as shown in FIG. 2 (b) to prevent excessive chipping.

When it is desired to change the setting of the chipping depth, the cutting edge preventing member 20 for the cutting edge may be temporarily removed from the head portion 19 and replaced with another size as shown in FIG.

As described above, according to the wall chipping machine of this embodiment, since the turning radii at the tips of the respective drum cutters, that is, at the cutting edges are substantially the same, when the rotating drum is rotated, the locus of the cutting edges is drawn. Becomes a cylindrical surface.

Therefore, the chiseled surface has less irregularities, and the wall surface can be cut flat so as to remove the thin skin, and the quality of the wall surface finish is improved. As a result,
The adhesion strength with the inner wall can be increased. It is also possible to cut the inside corners.

Further, since the cutting edge preventing member is detachably attached near the drum supporting bracket, when the chip depth reaches a certain size, the plate surface of the cutting edge preventing member is pressed against the wall surface to serve as a stopper. Fulfill. Therefore, excessive chipping is prevented in advance, the quality of the finished surface is improved, and the amount of concrete required for constructing the inner wall can be saved. Also, there is no risk of damaging the reinforcing bars in the wall.

In the present embodiment, the rotating drum is cylindrical and the drum cutters of the same shape and size are attached to the drum. However, the blade edges of the drum cutters rotate at substantially the same radius of rotation, If the trajectories are all aligned on the same cylindrical surface, the rotating drum does not have to be cylindrical, and it is not necessary to use a drum cutter having the same shape and size.

[0030]

As described above, the wall chipping machine of the present invention includes a mounting bracket mounted on a base machine such as a backhoe, a drum supporting bracket fixed on the opposite side of the mounting bracket, In a wall surface chipping machine composed of a rotary drum rotatably supported by a drum supporting bracket and connected to a drive shaft of a predetermined rotary drive mechanism, and a plurality of drum cutters projecting around the rotary drum, Since the drum cutters are arranged on the rotary drum so that the turning radii at the tips of the respective drum cutters are substantially the same, the unevenness generated on the chipping surface is reduced to finish as evenly as possible and prevent the chipping too much. be able to.

[0031]

[Brief description of the drawings]

FIG. 1 is a diagram of a wall chipping machine according to the present embodiment,
(a) is a side view, (b) is a plan view showing a part of the cross section.

2A and 2B are explanatory views for explaining the operation of the wall chipping machine according to the present embodiment, where FIG. 2A is a view showing a state in which an inner corner portion of a continuous underground wall is cut, and FIG. The figure which showed the mode that the cutting edge prevention member was pressed against the wall surface at the chisel depth.

FIG. 3 is an explanatory view showing a state of exchanging a cutting edge preventing member.

FIG. 4 is a diagram showing a state in which a wall surface of an underground continuous wall is mounted.

FIG. 5 is a cross-sectional view showing a conventional wall chipping machine.

[Explanation of symbols]

 3 Hydraulic Motor (Rotation Drive Mechanism) 11 Wall Chipping Machine 12 Mounting Bracket 13 Drum Support Bracket 14 Rotating Drum 15 Drum Cutter 16 Cutter Teeth 17 Holder 19 Head Part 20 Blade Tip Biting Prevention Member

Claims (2)

[Claims] 1. A mounting bracket for mounting on a base machine such as a backhoe, a drum supporting bracket fixed to the opposite side of the mounting bracket, and a predetermined rotational drive rotatably supported by the drum supporting bracket. In a wall chipping machine composed of a rotary drum connected to a drive shaft of a mechanism and a plurality of drum cutters provided around the rotary drum, the radius of gyration at the tip of each drum cutter is substantially the same. A wall chipping machine, wherein the drum cutter is arranged on the rotary drum so that 2. The wall chipping machine according to claim 1, wherein a cutting edge preventing member is detachably attached near the drum supporting bracket.