JP2901036B2 - Shaft excavator - Google Patents

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 full section deep foundation excavator configured to excavate with a cutter.

[0002]

2. Description of the Related Art Various types of shaft excavators of this type have been developed to mechanize conventional excavation work by humans using picks, breakers, and the like. There is known a method of mechanically operating the excavated breaker and excavating by mechanically operating a shovel, a breaker, a rotary cutter, or the like supported by a guide rail, a gripper, or the like installed in a mine. The former can excavate ground with hardness from ordinary soil to medium hard rock. In addition, the latter can excavate ground with hardness from ordinary soil to soft rock.

[0003]

The former type of the above-mentioned conventional type is as follows.
At the time of excavation, there is an advantage that an operator is not placed in the mine and excavation can be performed up to the middle hard rock. In the latter case, although it is lightweight, it involves a danger because workers must enter the mine and operate the machine during excavation, and
Excavation of medium hard rock is not possible.

[0004] In both cases, it is impossible to excavate the entire cross section continuously and simultaneously, and at the time of excavation, failure of the hydraulic and electric systems is liable to occur due to vibration of a breaker or the like. Therefore, a technical problem to be solved arises in order to adopt the advantages of the above-mentioned conventional type and to eliminate defects, and the present invention aims to solve the problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and is fixed to a downhole wall by a gripper and divided into a central cutter and an outer peripheral cutter.
The vertical shaft excavator is configured to be able to continuously excavate the entire section of the shaft with a cutter composed of
The center cutter and outer cutter are concentric
Has an external gear and an internal gear, and
Drive motor pinion between intermediate and internal gears
Gears are arranged and engaged with each other, and the pinion gears
Rotation reverses the center cutter and outer cutter at the same time
A shaft excavator configured to rotate in a direction is provided.

[0006]

The cutter of the shaft excavator is divided into a central cutter and a peripheral cutter, and the central cutter and the peripheral cutter have concentric gears and concentric gears, respectively, between which the drive motor pinion gears. Since they are interposed and mesh with each other, their central cutter and outer peripheral cutter are excavated over the entire cross section of the shaft while rotating in opposite directions. At this time, since the cutters rotate in opposite directions to each other, the reaction force of the generated excavation torque is canceled out by the respective rotations of the inner and outer cutters in the opposite directions, and becomes smaller. Can be easily fixed. In this way, it is possible to increase the equipment torque, and it is possible to excavate up to medium hard rock, and furthermore, since a single series of drive motors can be used, the drive unit is also compact, and There is no need for personnel to enter the mine to operate.

[0007] Further, since the excavation is a rotary excavation of the entire cross section, the vibration of the machine at the time of excavation becomes small, and various troubles can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Note that, for convenience of explanation, the explanation will be made on the whole of related mechanisms. FIG. 1 is a longitudinal sectional view showing a shaft excavation state. In the figure, reference numeral 1 denotes a full-section excavator, and the full-section excavator 1 includes a gripper 3 on a shaft wall 2 of a shaft.
3 and is provided with central cutters 4, 4,... And peripheral cutters 5, 5,. The center cutters 4, 4,... And the outer peripheral cutters 5, 5,... Are driven by the drive motors 6, 6,.

The debris excavated by the central cutters 4, 4 and the outer peripheral cutters 5, 5 are stored in the debris storage portion 7 behind the central cutters 4, 4,.
Then, the lower end of the vacuum discharge pipe 8 is faced, and the slip is discharged to the ground by driving the vacuum discharger 9 installed on the ground. The discharging method is not limited to the vacuum method, but may be a reverse discharging method, a clamshell discharging method, or the like.

Next, the full-section excavator 1 will be described in detail with reference to FIGS. The full-section excavator 1 is, as described above,
, The central cutters 4, 4,..., The outer peripheral cutters 5, 5,... And the drive cutters for imparting drive rotation to the central cutters 4, 4,. Consisting of drive motors 6, 6 ... etc., and
These components are mounted on a frame composed of an outer cylinder 10 and an inner cylinder 11.

The outer cylinder 10 and the inner cylinder 11 are integrally formed with a certain interval T, and the inner cylinder 11 is formed lower than the outer cylinder 10. Should not be limited. A ring 13 is surrounded on the outer surface of the outer cylinder 10 with a slight clearance t.
The grippers 3, 3... Further, the grippers 3, 3 are fixed to the ring 13 with sliding outer cylinders 14, 14,..., And the inside of the sliding outer cylinders 14, 14,. It is configured. However, the outer cylinder for slide 1
, 14... Are openings 10 provided in the outer cylinder 10.
a, 10a are inserted into the outer cylinder 10, and the openings 10a, 10a.
6 has a vertical length that allows the frame constituted by the outer cylinder 10 and the inner cylinder 11 to move up and down. Therefore, the shift jacks 16, 16,... Need only be opened to a length corresponding to one stroke. In the figure
Reference numeral 12 denotes a winch (not shown) installed on the ground portion.
Hoisting or suspending the full-section excavator 1
Shows a wire rope for

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

Slide keys 17, 17,... Having a vertical length corresponding to one stroke of the shift jacks 16, 16 are protruded at several places on the outer surface of the outer cylinder 10, and Slide keys 13 are cut out so that 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 are respectively provided in the slide grooves 1.
3a, 13a...

On the lower surface of the ring 13, upper ends of the shift jacks 16, 16... Are attached, and the piston rods 16a, 16a of the shift jacks 16, 16,.
16a are pivotally supported by a flange 18 projecting outward from the lower end of the outer cylinder 10. As shown in FIG. Thus, the frame formed by the outer cylinder 10 and the inner cylinder 11 is provided with the shift jacks 16, 16,... While the ring 13 is fixed to the shaft wall 2 of the shaft by the grippers 3, 3,. By driving, the piston rods 16a can be moved up and down by an amount equivalent to one stroke.

Drive motors 6, 6,... Are mounted on an upper portion between the outer cylinder 10 and the inner cylinder 11, and
Each shaft of the drive motors 6, 6,... Has a pinion gear 19,
19 are mounted on the shaft. On the other hand, the pinion gear 1
On the same plane as the outer slewing bearings 20, the outer slewing bearings 20 are interposed between the outer cylinder 10 and the pinion gears 19, 19, respectively.
a provided with an inscribed gear 20b,
b is meshed with the pinion gears 19, 19. Then, the inner ring 2 of the outer peripheral side slewing bearing 20 is used.
, A frame 21 of the outer peripheral cutters 5, 5,... Is integrally provided with the lower frame 5 so that a lower end surface of the frame 21 coincides with a lower end surface of the outer cylinder 10, and lower frames 5a, 5a ..., and the lower frame 5a,
Are protruded outwardly, and cutter blades 5b, 5b are attached to the lower surfaces of the lower frames 5a. Furthermore, the outer peripheral cutters 5, 5,... Are configured to be able to expand and contract the outer diameter by the extendable jacks 22, 22, but are not limited thereto.

When the outer peripheral cutters 5, 5... Are formed to be extendable and contractible, the extensible jacks 2 are provided at the bases of the lower frames 5a, 5a.
The pivotal ends of the piston rods 22a, 22a are pivotally supported, and the distal end frames 5c, 5c are fixed to the other end of the telescopic jacks 22, 22. By attaching the cutter blades 5b, 5b to the lower surface of the..., The end frames 5c, 5c. The diameter can be enlarged and reduced.

Next, on the same plane as the pinion gears 19, 19, the inner cylinder 11 and the pinion gear 1 are placed.
, 19,..., Respectively, and an inner peripheral side slewing bearing 23 is interposed therebetween.
And an external gear 23b integral 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 attaching the central cutters 4, 4,... Is integrally provided with the lower end surface of the frame 24 so as to coincide with the lower end surface of the inner cylinder 11. And support spokes 2 for central cutters 4, 4, ...
5, 25... And the supporting spokes 25, 2
The central cutters 4, 4... Having the cutter blades 4a, 4a.

Thus, the cutter part is the center cutter 4,
4 ... and the outer cutter 5,5 ...
The rotation of the respective pinion gears 19, 19,... Mounted on the shafts of the respective drive motors 6, 6,.
And the outer peripheral cutters 5, 5,..., While the central cutters 4, 4,... And the outer peripheral cutters 5, 5,. The generated excavation torque reaction force is applied to the central cutters 4, 4,.
, And the vibrations of the entire cross-section excavator 1 are also reduced, thereby making it possible to prevent the occurrence of trouble in each part. Further, the center cutters 4, 4 and the outer cutters 5, 5 are opposed to the pinion gears 19, 19, respectively.
In addition, since the circumscribed gear 23b is meshed to form a rotation drive unit, the cutters can be easily rotated in opposite directions, and the drive motors 6 can be arranged in one line, so that the drive unit can be made compact.

The central cutters 4, 4,... Project downward from the peripheral cutters 5, 5,. In this way, the central cutters 4, 4,... Are excavated prior to the outer peripheral cutters 5, 5,.
For example, the above-mentioned vacuum discharge pipe 8
Can be discharged to the outside of the mine by facing the lower end of the pit, so that the soil discharging property is good.

As shown in FIG. 5, telescopic jacks 26, 26,... Are respectively mounted in support spokes 25, 25, of the central cutters 4, 4,.
The lower ends of the respective piston rods 26a, 26a are pivotally supported by the central cutters 4, 4 so that the central cutters 4, 4 can be extended downward. . By extending the central cutters 4, 4,..., The outer peripheral cutters 5, 5,... Are pulled up above the excavation surface. Can be easily corrected for rolling.

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 shaft, and the central cutter is driven by the rotation of the drive motors 6, 6 through the internal gear 20b and the external gear 23b from the pinion gears 19, 19. , 4 and the outer peripheral cutters 5, 5,..., Respectively, are rotated in opposite directions, and the shift jacks 16, 16,.
Excavate by the equivalent of one stroke of 16. That is, while the entire cross section of the shaft is continuously excavated by the central cutters 4, 4 and the outer peripheral cutters 5, 5,..., The shift jacks 16, 16,.
Then, the jacks 15, 15 of the grippers 3, 3,... Are contracted to release the fixed state with respect to the pit wall 2, and the extended shift jacks 16, 16,. 2 and excavate a shaft with a predetermined depth while repeating the excavation operation.

In the drawings, reference numeral 27 denotes a seal, and reference numeral 28 denotes a liner plate. Similar effects can be expected not only for cutters divided into two parts, but also for cutters divided into three or more parts. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0023]

According to the present invention, the cutter is divided into a central cutter and a peripheral cutter, and the excavating torque generated by the offset effect based on the reversal of both cutters. The reaction force is small,
Therefore, the device can be easily fixed to the downhole by the gripper, and a large cutter torque can be provided. Furthermore, since the circumscribed gear of the drive unit of the center cutter and the internal gear of the outer cutter are meshed facing each other inside and outside the pinion gear of the drive motor, the center cutter and the outer cutter can be simultaneously and easily formed. Since the motor rotates in the reverse direction, the drive unit can be a single line, and the drive unit is compact. In addition, since the whole section is a rotary excavator, the vibration of the machine during excavation is small, and various troubles can be prevented. In addition, the present invention has various effects such as that it is not necessary for an operator to enter a mine at the time of excavation, and that a medium hard rock can be excavated.

[Brief description of the drawings]

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

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

FIG. 3 is a cross-sectional bottom view of the same part.

FIG. 4 is a longitudinal sectional view of another embodiment in which grippers are provided in two stages.

FIG. 5 is a partial longitudinal front view of another embodiment when a jackie is provided on a center cutter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Full-section excavator 2 Underground wall 3 Gripper 4 Central cutter 5 Outer peripheral cutter 6 Drive motor 19 Pinion gear 20b Internal gear 23b External gear

────────────────────────────────────────────────── ─── Continued on the front page (73) Patent owner 000207780 Taitoyo Construction Co., Ltd. 1-424 Shinkawa, Chuo-ku, Tokyo (73) Patent owner 391035795 Shiraishi Co., Ltd. 3-4-1 Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Minoru Iwazuki 1 Higashi-shinmachi, Higashi-ku, Nagoya City, Aichi Prefecture Inside Chubu Electric Power Co., Inc. (72) Inventor Junichiro Omori 2-3-24 Yokota, Atsuta-ku, Nagoya City, Aichi Prefecture Chubu Electric Power Co., Inc. Inside the construction site (72) Inventor Hironobu Nagase 1-1-5, Nishihioki, Nakagawa-ku, Nagoya City, Aichi Prefecture Inside Kumagaya Gumi Nagoya Branch (72) Inventor Shin Koda 2-1-1 Honohara, Toyokawa City, Aichi Prefecture Co., Ltd. Kumagai Gumi Toyokawa in a factory (56) reference Patent Sho 63-312498 (JP, a) JP flat 5-65793 (JP, a) (58 ) investigated the field (Int.Cl. ^6, B name) E21D 1/06 E21D 9/08

Claims (1)

(57) [Claims] 1. A center cap fixed to a pit wall by a gripper.
Cutter divided into a cutter and an outer cutter,
In a shaft excavator configured to be able to continuously excavate the entire cross section of the shaft, the above-mentioned central cutter and
The outer peripheral cutter is connected to the circumscribed gear and
Gears, and their external and internal gears
The pinion gear of the drive motor is arranged in the middle of
And the center cutter is rotated by rotation of the pinion gear.
A shaft and an outer cutter are configured to rotate simultaneously in opposite directions .