JPH06294276A - Cutter device for use in vertical shaft excavator - Google Patents

Abstract

PURPOSE:To enhance the performance of a cutter device for mucking operations by splitting a cutter into a center cutter and an outer peripheral cutter, and projecting the center cutter downwards beyond the outer peripheral cutter to provide a difference of height between the cutters, and providing a muck collecting portion in an end excavating portion. CONSTITUTION:A cutter is split into a center cutter 4 and an outer peripheral cutter 5. The cutters 4, 5 are rotated in opposite directions using a driving motor 6 and simultaneously rotated to excavate an entire cross section. The center cutter 4 is projected downward beyond the outer peripheral cuter 5 to provide a difference of height between the cutter. The center cutter 4 is moved ahead of the cutter 5 to excavate the center ground. Muck excavated by the outer peripheral cutter 5 is dropped and collected in a muck collecting portion on the back side of the center cutter 4. Since mucking devices are gathered at the center position, mucking operations can be efficiently performed and excavation operability can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft excavator, and more particularly to a cutter device for a full-section deep foundation excavator configured to excavate with a cutter.

[0002]

2. Description of the Related Art This type of vertical shaft excavator has been developed as a mechanized manual excavation work using a conventional pick, breaker, etc., for example, it is supported on a mount installed outside the shaft. A method of excavating the breaker by mechanically operating it, a method of excavating by mechanically operating a shovel, a breaker, a rotary cutter, etc. supported by a guide rail installed in the mine, a gripper or the like are known.

[0003]

In both of the above-mentioned conventional types, the earth and sand excavated by a breaker and the like are accumulated by shovels, clamshells, etc. and discharged, but the earth-removing work is difficult and intermittent earth-moving is performed. Cannot be continuously and efficiently excavated. Therefore, there arises a technical problem to be solved in order to improve the performance of the scraping work and obtain an efficient excavator, and an object of the present invention is to solve the problem.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above object, and is a shaft excavator fixed to a pit wall by a gripper and constructed for excavating by a cutter. In addition, the cutter is divided into a central cutter and an outer peripheral cutter, and the central cutter is projected downward from the outer peripheral cutter to provide a step between the both cutters, so that the central cutter cuts into a leading excavation portion. A cutter device for a vertical shaft excavator provided with a section.

[0005]

The cutter of the shaft excavator is divided into the central cutter and the peripheral cutter, and the central cutter and the peripheral cutter simultaneously rotate continuously to excavate the entire cross section of the shaft. At this time, since the central cutter is projected below the outer cutter and a step is provided between both cutters,
The central cutter excavates the ground in the center before the outer cutter. Therefore, since a slip reservoir is formed on the back surface of the central cutter, the earth and sand excavated by the outer cutter also falls and accumulates in the slip reservoir. It will be possible to gather and install them in the same place, and efficient work of removing the waste will be performed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that, for convenience of description, the entire related mechanism will be described. FIG. 1 is a vertical sectional view showing a vertical shaft excavation state. In the figure, 1 is a full-section excavator, which has a gripper 3 on a shaft wall 2 of a vertical shaft.
It is fixed by 3 ... And it is comprised so that a center cutter 4,4 ... and an outer peripheral cutter 5,5 ... may be carried out. The center cutters 4, 4 ... And the outer cutters 5, 5 ... Are driven by drive motors 6, 6 ... And are configured to rotate in opposite directions.

Further, since the scraps excavated by the central cutters 4, 4 ... And the outer peripheral cutters 5, 5 ... Are accumulated in the slip reservoir 7 behind the central cutters 4, 4 ,.
The lower end of the vacuum earth-discharging pipe 8 is exposed to the above, and the scrap is discharged to the ground by driving the vacuum earth-discharging machine 9 installed on the ground. Thus, the earth discharging is not limited to the vacuum method, but a reverse earth discharging method, a clam shell earth discharging method, or the like can be adopted.

Next, the full-section excavator 1 will be described in detail with reference to FIGS. 2 and 3. As described above, the full-section excavator 1 is
The grippers 3, 3 ... for fixing to the pit wall 2, the central cutters 4, 4, ..., The outer peripheral cutters 5, 5 ..., and the central cutters 4, 4, ... Drive motors 6, 6, etc., and
Each of these parts is attached to a frame composed of an outer cylinder 10 and an inner cylinder 11.

Thus, the outer cylinder 10 and the inner cylinder 11 are integrally formed with a constant interval T, and the inner cylinder 11 is formed lower than the outer cylinder 10. Should not be limited. The ring 13 is surrounded by an outer surface of the outer cylinder 10 with a slight clearance t.
Grippers 3, 3 ... Are attached to 3, respectively. Further, the grippers 3, 3 ... Fix the sliding outer cylinders 14, 14 ... On the ring 13, and the insides of the sliding outer cylinders 14, 14 ... are slidable by jacks 15, 15, respectively. It is configured. However, the slide outer cylinder 1
4, 14 are openings 10 provided in the outer cylinder 10.
The opening portions 10a, 10a, ...
The frame composed of the outer cylinder 10 and the inner cylinder 11 is vertically movable by the action of 6. Therefore, it suffices that the shift jacks 16 are opened to a length corresponding to one stroke.

Further, as shown in FIG. 4, the grippers 3, 3 ... May be provided in two upper and lower stages. In this case, the rings 13 are provided above and below, and the upper and lower rings 13 and 13 are
Are connected by rods 13b and 13b. The grippers 3, 3, ... Are attached to the upper and lower rings 13, 13, respectively. In that case, a vertical posture correction function is added to the full-section excavator 1. That is, the inclination and the amount of centering of the full-section excavator 1 can be corrected to the correct posture by adjusting the strokes of the upper and lower two-stage grippers 3, 3.

Further, slide keys 17, 17 ... Having a vertical length corresponding to one stroke of the shift jacks 16, 16 ... Are projectingly provided at several positions on the outer surface of the outer cylinder 10, and A slide groove 13a, which is notched so that the slide keys 17, 17 ...
13a ... Are provided in the vertical direction on the inner side surface of the ring 13, and the slide keys 17, 17 ...
3a, 13a ...

Further, the upper ends of the shift jacks 16, 16 ... Are attached to the lower surface of the ring 13, and the piston rods 16a of the shift jacks 16, 16 ...
The lower ends of 16a are pivotally supported by a flange portion 18 projecting outward from the lower end of the outer cylinder 10. Thus, the frame composed of the outer cylinder 10 and the inner cylinder 11 has a structure in which the ring 13 is fixed to the shaft wall 2 of the vertical shaft by the grippers 3, 3 ,. By driving, the piston rods 16a, 16a ... Can be moved up and down by an amount equivalent to one stroke.

Drive motors 6, 6, ... Are attached to the upper portion between the outer cylinder 10 and the inner cylinder 11, and
The drive motors 6, 6 ... Each have a pinion gear 19,
19 ... are pivoted. On the other hand, the pinion gear 1
On the same plane as 9, 19, ..., Outer peripheral side slewing bearings 20 are respectively interposed between the outer cylinder 10 and the pinion gears 19, 19 ,.
The internal gear 20b integrated with a is provided, and the internal gear 20b
b is meshed with the pinion gears 19, 19 ... Therefore, the inner ring 2 of the outer slewing bearing 20
0a is integrally provided with a frame 21 of outer peripheral cutters 5, 5, ..., The lower end surface of the frame 21 is made to coincide with the lower end surface of the outer cylinder 10, and the lower frames 5a, 5a are attached to the lower end surface of the frame 21. ... is further installed, and the lower frame 5a,
The lower part of 5a ... is projected outward, and the cutter blades 5b, 5b ... Are attached to the lower surfaces of the lower frames 5a, 5a. Further, the outer peripheral cutters 5, 5, ... Are configured so that the outer diameters thereof can be expanded / contracted by the expansion / contraction jacks 22, 22, .. However, it is not limited thereto.

When the outer peripheral cutters 5, 5, ... Are formed to be expandable and contractible, the elastic jacks 2 are attached to the bases of the lower frames 5a, 5a.
2, 22 ... Piston rods 22a, 22a ... are pivotally supported, and further tip frames 5c, 5c ... Are fixed to the other ends of the telescopic jacks 22, 22 ,. By attaching the cutter blades 5b, 5b ... to the lower surface of the ..., the tip frames 5c, 5c ... Expand and contract by the drive of the telescopic jacks 22, 22 ,. It is possible to expand and contract the diameter.

Next, on the same surface as the pinion gears 19, 19, ..., The inner cylinder 11 and the pinion gear 1 are arranged.
.. are provided between the inner peripheral side slewing bearing 23 and the outer ring 23a of the inner peripheral side slewing bearing 23, respectively.
And an external gear 23b integrated with the external gear 23b.
Are meshed with the pinion gears 19, 19 ...
Therefore, the outer ring 23a of the inner peripheral side slewing bearing 23
A frame 24 for mounting the central cutters 4, 4 ... Is integrally provided with the lower end surface of the frame 24 so that the lower end surface of the frame 24 coincides with the lower end surface of the inner cylinder 11. Support spokes 2 for central cutters 4, 4 ...
5,25 ... are laid down, and the supporting spokes 25, 2
The central cutters 4, 4 ... Having the cutter blades 4a, 4a.

Thus, the cutter portion is the central cutter 4,
4 ... and peripheral cutters 5, 5 ...
The rotation of the respective pinion gears 19, 19 ... Axed to the shafts of the drive motors 6, 6 ...
... and the outer peripheral cutters 5, 5 ... are given rotations in mutually opposite directions, so that the central cutters 4, 4, ... And the outer peripheral cutters 5, 5 ,. The generated excavating torque reaction force is the central cutter 4, 4 ...
And the peripheral cutters 5, 5 ... Are offset by each other, so that the vibration of the full-section excavator 1 is also reduced, and it is possible to prevent the occurrence of troubles in each part. Further, the central cutters 4, 4 ... And the outer peripheral cutters 5, 5 ... Face the pinion gears 19, 19 ...
In addition, since the external gear 23b is meshed with each other to form a rotary drive unit, the reverse rotation of the cutters can be easily obtained, and the drive motor 6 can be provided in one line. Therefore, the drive unit can be configured compactly.

Thus, the central cutters 4, 4, ... Are protruded downward from the outer peripheral cutters 5, 5, .. Thus, since the central cutters 4, 4 ... Are made to precede the outer peripheral cutters 5, 5, ... To excavate, the slip reservoir 7 is formed behind them. That is, since the excavated portion by the preceding central cutters 4, 4 ... Is located in the center below the excavated portion by the peripheral cutters 5, 5, ... Surrounded by the central cutters 4, 4. The excavated soil by 5, 5 will also be concentrated in the slip reservoir 7 formed in the central portion. Therefore, for example, the lower end portion of the above-described vacuum earth-discharging pipe 8 can be made to face the sludge accumulating portion 7 and can be discharged to the outside of the mine, so that the earth-discharging property becomes extremely good.

Further, as shown in FIG. 5, telescopic jacks 26, 26 ... Are mounted in the support spokes 25, 25 of the central cutters 4, 4 ,.
The lower ends of the respective piston rods 26a, 26a of 6, 26 ... Are pivotally supported on the central cutters 4, 4 ..., and the central cutters 4, 4 ... Can be extended downward. . Thus, when the central cutters 4, 4 ... Are extended, the outer peripheral cutters 5, 5, ... Are raised above the excavation surface. Therefore, by rotating the outer peripheral cutters 5, 5 ,. Rolling correction can be easily performed.

Next, the operating state of the full-section excavator 1 will be described. First, the grippers 3, 3 ... Are fixed to the shaft wall 2 of the vertical shaft, and the central cutters are driven from the pinion gears 19, 19 ... via the internal gear 20b and the external gear 23b by the rotational drive of the drive motors 6, 6. 4 and 4 and outer peripheral cutters 5 and 5 are rotated in opposite directions to each other, and the shift jacks 16, 16 are driven by the propulsive force of the shift jacks 16, 16.
Dig only 16 strokes. That is, the entire cross section of the vertical shaft is continuously rotated and excavated by the central cutters 4, 4, ... And the outer peripheral cutters 5, 5 ,. Then, the shift jacks 16, 16 ...
After that, the jacks 15, 15 of the grippers 3, 3 ... Are contracted to release the fixed state from the mine wall 2, and the extending shift jacks 16, 16 ... are further contracted, and then the grippers 3, 3 ... The shaft is fixed at 2, and the vertical shaft having a predetermined depth is excavated by reversing the excavation work.

In the figure, reference numeral 27 is a seal and 28 is a liner plate. Further, the same operational effect can be expected not only when the cutter is divided into two but also when it is divided into three or more. In this case as well, the excavated soil in the outer peripheral portion is sequentially concentrated in the sludge reservoir in the central portion. 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 version.

[0021]

As described in detail in the above embodiment, the present invention is as follows.
The cutter is divided into a central cutter and a peripheral cutter, and the central cutter projects downward from the peripheral cutter and a step is provided between both cutters. Excavate the ground. At this time, the excavated earth and sand is guided to the slip reservoir on the back surface of the central cutter. Further, since the earth and sand excavated by the outer peripheral cutter has a step between the both cutters, the earth and sand also fall into the slip accumulating portion at the central portion and concentrate. Thus, since the earth removing device can be installed centrally in the central portion, it is possible to perform the earth removing work extremely efficiently. Therefore, the rotary excavation work by both cutters can be continuously performed. Thus, the invention has various effects such as improved excavation workability.

[Brief description of drawings]

FIG. 1 is an explanatory vertical sectional view showing a vertical shaft excavation state by a full-section excavator.

FIG. 2 is a vertical sectional view of a full-section excavator.

FIG. 3 is a bottom view crossing the same portion.

FIG. 4 is a vertical cross-sectional view of another embodiment when the grippers are provided in two stages.

FIG. 5 is a partially longitudinal front view of another embodiment when a central cutter is provided with a jackie.

[Explanation of symbols]

 1 Full section excavator 2 Well wall 3 Gripper 4 Center cutter 5 Peripheral cutter 6 Drive motor 19 Pinion gear 20b Inner gear 23b Outer gear

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 000207780 Taiho Construction Co., Ltd. 1-24-4 Shinkawa, Chuo-ku, Tokyo (71) Applicant 391035795 Shiroishi Co., Ltd. 2-4-1 Marunouchi, Chiyoda-ku, Tokyo (72) ) Inventor Hiroaki Tonooka, Higashishinmachi, Higashi-ku, Nagoya, Aichi Chubu Electric Power Co., Ltd. (72) Inventor Toshinasa Naito 2-3-24 Yokota, Atsuta-ku, Nagoya, Aichi Chuo Electric Power Co., Inc. (72) Inventor Noboru Tsurugi Nishihiki 1-5, Nakagawa-ku, Nagoya, Aichi Prefecture, Kumagaya Gumi Co., Ltd. Nagoya Branch (72) Inventor, Nobu Koda, Honohara 2-chome, Toyokawa City, Aichi Prefecture Kumagaya Gumi Toyokawa Plant Co., Ltd. Within

Claims (1)

[Claims] 1. Fixed to a mine wall by a gripper, and
In a vertical shaft excavator configured to be excavated by a cutter, the cutter is divided into a central cutter and an outer peripheral cutter, and the central cutter projects downward from the outer peripheral cutter to form a step between both cutters. A cutter device in a vertical shaft excavator, characterized in that a cutting reservoir is provided in a preceding excavation part by the central cutter.