JPH05295986A - Rock excavator - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rock excavator capable of excavating a hard rock in a free section. [Structure] A cutter head 5 is swingably provided in an arbitrary direction via a parallel link mechanism 4 at a front portion of a self-propelled traveling unit 2, and the excavating traveling unit 2 is fixed to the traveling unit 2. By providing the gripper portion 12 for rotating the cutter head body 5a, the cutter head 5 is swung by the parallel link mechanism 4 while rotating the cutter head body 5a, so that free cross-section excavation of hard rock can be easily performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock excavator capable of excavating a free cross section.

[0002]

2. Description of the Related Art Conventionally, a rock excavator of this type is composed of an excavation portion a and a gripper portion b for taking a reaction force of the excavation portion as shown in FIG. 1, and the excavation portion a is a gripper portion b. Supported against. Further, since it is necessary to advance the rock excavator along with the excavation, as shown in FIG. 1, a method of swinging the propulsion gripper part b along the main beam c protruding rearward from the excavation part a, or a propulsion gripper A method in which a crawler type traveling portion is provided in the portion b and the vehicle travels forward while traveling by this traveling portion is generally adopted.

[0003]

However, in the rock excavator shown in FIG. 1, since the excavation part a cannot be swung in a wide range, the cross-sectional shape of the tunnel that can be excavated is limited to a circular shape. There are problems such as difficulty in excavating the cross section. Further, in the case where the propulsion gripper part b is composed of a free-running traveling part, the arm projecting forward from the traveling part can swing in any direction, and therefore a cutter provided at the tip of the arm can excavate a free cross section. Possible, but
The rock mass that can be excavated was limited to relatively soft rock mass, and there was a problem that it could not support hard rock mass. The present invention has been made to improve the above-mentioned conventional problems,
An object of the present invention is to provide a rock excavator capable of excavating a hard rock in a free cross section.

[0004]

SUMMARY OF THE INVENTION The present invention has been made for the above-mentioned object, and a cutter head is provided on a front portion of a free-running traveling portion via a parallel link mechanism so as to be swingable in any direction. A gripper portion for fixing the traveling portion during excavation is provided on the traveling portion.

[0005]

[Operation] With the above structure, free cross-section excavation in hard rock can be easily performed, and the parallel link mechanism is adopted.
The swing mechanism can be downsized and simplified.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings shown in FIG. FIG. 2 shows a rock excavator excavating rock, and in this figure, 1 indicates the excavator main body. The excavator main body 1 has a traveling unit 2 which is freely movable by a crawler type suspension, and a support frame 3 is installed on the upper portion of the traveling unit 2, and a parallel link mechanism is provided in front of the support frame 3. A cutter head 5 is swingably attached via 4.
The parallel link mechanism 4 is, for example, a combination of six hydraulic cylinders 4a to 4f as shown in FIG. 4, and one end side of each hydraulic cylinder 4a to 4f is attached to the support base 3 side via a ball joint 6. Along with
The other end is attached to the rear surface of the cutter head 5 via a universal joint 7, and is configured so that the cutter head 5 can be swung in any direction by expanding and contracting the hydraulic cylinders 4a to 4f. ..

The cutter head 5 comprises a cutter head main body 5a and a drive section 5b for driving the main body 5a, as shown in FIG. The cutter head body 5a has a disc shape, and a plurality of disc cutters 5 are provided on the outer periphery of the front surface as shown in FIG.
c are removably attached at equal intervals in the circumferential direction, and a cylindrical support portion 5d protruding from the rear surface is provided with a bearing 5e.
It is rotatably supported by the case 5f of the drive unit 5b via. A ring gear 5g is fixed to the rear end of the support portion 5d, and the outer peripheral portion of the ring gear 5g also has the bearing 5g.
The ring gear 5g is supported by the case 5f via e, and the pinion 5h is meshed with the ring gear 5g. The pinion 5h is fixed to a rotary shaft 8a of a cutter head motor 8 attached to the rear surface of the case 5f, and the cutter head main body 5a is rotationally driven by the cutter head motor 8.

On the other hand, a gathering device 11 for scraping the sand excavated by the cutter head 5 and loading it on the soil discharging device 10 such as a belt conveyor is fixed to the front part of the running part 2, and the running part 2 is fixed to the rock on the upper part. A gripper portion 12 that supports the excavation reaction force is provided. The gripper portion 12 includes a pair of hydraulic cylinders 12a and 12b arranged in opposite V-shapes on both sides of the traveling portion 2 and these hydraulic cylinders 12a and 1b.
It is composed of a gripper 12c provided at the joint portion of 2b. Of the hydraulic cylinders 12a and 12b, one end of the front hydraulic cylinder 12a is mounted near a front outrigger 13 projecting laterally of the traveling unit 2 via a ball bearing 14, and the other end is a pin 12d. The other hydraulic cylinder 12b
And one end of the gripper 12c is pivotally attached to the gripper 12c. The other end of the other hydraulic cylinder 12b is provided in the vicinity of a rear outrigger 15 projecting on both sides of the rear portion of the traveling portion 2 and the ball bearing 1
It is attached via 6.

Next, the operation will be explained.
First, a hydraulic cylinder 1 on the wall of the already excavated tunnel.
The gripper 12c is crimped by 2a and 12b, and the front and rear outriggers 13 and 15 are grounded to fix the traveling unit 2. Next, in this state, while the cutter head main body 5a is rotated by the cutter head motor 8, the parallel link mechanism 4 swings the cutter head 5 in an arbitrary direction as shown in (a) and (b) of FIG. Cutter head body 5
The rock bed is excavated by the disk cutter 5c provided at a. Since the cutter head body 5a is provided with the disc cutter 5c only on the outer peripheral side, when the cutter head 5 is moved to the right as shown in FIG. 5 while excavating by the disc cutter 5c, for example, Since the locus becomes a circle having a small curvature as shown in FIG. 7, it becomes difficult to receive an eccentric load, which causes the disc cutter 5c to be worn early due to the eccentric load, and the parallel link mechanism 4
It is possible to prevent an excessive external force from acting on. Then, the scraps excavated by the cutter head 5 are scraped by the gathering device 11, stacked on the soil discharging device 10, and transported to the rear.

On the other hand, when the cutter head 5 is freely swung to complete excavation for one pitch, the gripper portion 12 and the front and rear outriggers 13 and 15 are released, the traveling portion 2 is moved forward, and the excavation operation is repeated again. It enables free cross-section excavation in hard rock.

[0011]

As described above in detail, according to the present invention, the rock head is excavated by the cutter head while the cutter head is swung in any direction by the parallel link mechanism. In addition, the parallel link mechanism allows the cutter head to swing in any direction, so the swing mechanism can be simplified compared to the conventional one, and this allows the swing mechanism to be smaller and lower in size. Price can be achieved. Also, by providing a disc cutter on the cutter head, heavy excavation on hard rock is possible, and by providing the disc cutter only on the outer peripheral side of the cutter head body, it is possible to reduce the unbalanced load during copy excavation. It is possible to prevent the cutter from being worn early due to an unbalanced load and to prevent an excessive external force from acting on the parallel link mechanism. Furthermore, by providing a drive source on the cutter head to drive the cutter head body, a power transmission mechanism between the traveling section and the cutter head is not required, and the entire device can be downsized, so that it can be carried in the tunnel. There is also an effect that it can be taken out easily.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a conventional rock excavator.

FIG. 2 is a sectional view of a rock excavator according to an embodiment of the present invention.

FIG. 3 is a sectional view of a cutter head of a rock excavator according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a parallel link mechanism that swingably supports a cutter head.

FIG. 5 is a front view of the cutter head body.

FIG. 6 (a) is a side view of a rock excavation state. (B) It is a top view of a rock excavation state.

FIG. 7 is an explanatory diagram showing a locus of a disc cutter.

[Explanation of symbols]

 2 Traveling section 4 Parallel link mechanism 5 Cutter head 5a Cutter head body 5c Disk cutter 12 Gripper section

Claims (2)

[Claims] 1. A cutter head 5 is swingably provided in an arbitrary direction through a parallel link mechanism 4 at a front portion of a self-propelled traveling unit 2, and the traveling unit 2 is provided with an excavating traveling unit 2 during excavation. A rock excavator provided with a gripper portion 12 for fixing a rock. 2. The rock excavator according to claim 1, wherein the cutter head 5 is provided with a drive source, and the drive source rotatably drives the cutter head body 5a having the disk cutter 5c mounted on the outer periphery thereof.