JPH04119896U - Tunnel excavator disc cutter - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the tunnel excavation radius to be increased using cutters with the same radius. [Structure] A bracket 1 having a semicircular mounting portion 2,
A retainer 3 that has a circular mounting part 11 and a shaft bearing hole 10 eccentrically fitted and mounted on this mounting part 2, a shaft 4 that is mounted on the shaft bearing hole 10 of this retainer 3, and a shaft 4 that is rotatably attached to this shaft 4. It consists of a supported hub b and a cutter ring 7 attached to this hub 6.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a disc cutter that is attached to the cutter head of a rock tunnel machine. Regarding.

0002

[Conventional technology]

A rock tunnel machine has a rotatable cutter head on the main body of the tunnel machine. Attach the disc cutter to the cutter head and rotate the cutter head to remove the disc cutter. The disc cutter excavates the ground while excavating the ground, and the disc cutter is, for example, 1, attach the retainer 3 to the semicircular mounting surface 2 of the bracket 1, and A hub 6 is rotatably supported via a bearing 5 on a shaft 4 attached to a retainer 3. A cutter ring 7 is attached to the outer peripheral surface of the retainer 3, and as shown in FIG. It is fixed to the bracket 1 with a bolt 8 and a pin 9.

0003

[Problem that the idea aims to solve]

The amount of forward protrusion of the cutting ring 7 of such a disc cutter from the bracket 1 is as follows. The excavation diameter of the tunnel machine is determined by the radius of the cutting ring 7. It is determined. On the other hand, when excavating soft ground, shoring is installed along the inner wall of the tunnel, Coating material may be sprayed onto the inside walls of the building. However, as mentioned above, the excavation diameter of the tunnel machine depends on the diameter of the cutter. Therefore, when installing shoring, the inner tunnel wall must be cut and widened after excavation. It is necessary to secure a space for installing the shoring, which increases the number of man-hours and When spraying covering material, change the spray thickness depending on the effective tunnel inner diameter. I can't.

0004 Therefore, the present invention was developed to solve the above-mentioned problems with a disc cover for tunnel machines. The purpose of this website is to provide the following information.

[0005]

[Means to solve the problem]

A retainer with a shaft bearing hole and a circular mounting part formed eccentrically.

[0006]

[Effect]

The cutter protrudes forward from the bracket by the amount of eccentricity between the shaft bearing hole and the circular mounting part. The tunnel excavation radius can be increased by increasing the amount and using cutters of the same diameter. .

[0007]

【Example】

As shown in FIGS. 3 and 4, the retainer 3 has a shaft bearing hole 10 and a circular mounting portion 11. , the center X of the shaft support hole 10 and the center Y of the circular mounting part 11 are eccentric, and the circular mounting part 11 is formed with a notch 12 and has a mounting surface 13, into which a bolt is inserted. An entry hole 14 is formed, and a plurality of mounting holes 15 and screw holes 16 are located at the center of the shaft bearing hole 10. They are formed at intervals on a circular arc trajectory centered on X, and are shown in Figures 5 and 6. Tighten the bolt 17 to the bracket 1 through the bolt insertion hole 14 as shown, and Fit the pin 19 into the mounting hole 15 from the hole 18 of the bracket 1, and insert the bolt 21 from the hole 20. It is screwed into the screw hole 16. Because of this, the cutter ring 7 is located between the center X of the shaft support hole 10 and the circular mounting portion 1. Since it protrudes forward from bracket 1 by the amount of eccentricity with respect to center Y of bracket 1, brackets with the same radius The excavation radius can also be increased by using the cutter ring 7. In addition, if the same retainer 3 as the conventional one is installed, the cutting will be done after the eccentricity. This makes it possible to reduce the tunnel excavation diameter.

[0008]

[Effect of the idea]

The bracket 1 of the cutter ring 7 is adjusted by the amount of eccentricity between the shaft bearing hole 10 and the circular mounting part 11. Since the forward protrusion amount of the Excavation diameter can be increased.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a conventional disc cutter.

FIG. 2 is a side view of a conventional disc cutter.

FIG. 3 is a side view of the retainer of the present invention.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is an overall sectional view.

FIG. 6 is an exploded perspective view.

[Explanation of symbols]

1 bracket, 2 semicircular mounting surface, 3 retainer,
4 shaft, 6 hub, 7 cutter ring, 10 shaft support hole, 11 circular mounting part

Claims (1)

[Scope of utility model registration request] [Claim 1] A bracket 1 having a semicircular mounting surface 2.
, a retainer 3 having a shaft bearing hole 10 and a circular mounting portion 11 eccentrically, a shaft 4 attached to the shaft bearing hole 10, and this shaft 4.
This disc cutter for a tunnel excavator is composed of a hub 6 rotatably supported on the shaft and a cutter ring 7 attached to the hub 6.