JPS61183599A - Shield type excavator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shield type excavator that facilitates the inflow of excavated soil.

[Prior art]

Conventionally, shield-type excavators for excavating tunnels, etc. excavate earth and sand using a cutter installed at the tip of the excavator. In some cases, it becomes difficult to take the soil and sand into the rear chamber, making it impossible to perform excavation work efficiently.

[Purpose of the invention]

This invention was devised by paying attention to such conventional problems, and its purpose is to prevent dirt from adhering to the vicinity of the cutter and to efficiently take dirt into the chamber. To provide a shield excavator that facilitates and allows the excavator to perform excavation work efficiently.

[Structure of the invention]

In order to achieve the above object, the present invention provides a shield excavator in which a cutter is rotatably supported on the front part of a shield body, in which a fluid additive is applied to the front face of the cutter provided with the cutter bit. The gist is that a discharge port is provided for discharge.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a longitudinal sectional side view of a shield main body 1 embodying the present invention, and FIG. 2 is a front view thereof.
A rotatable disc-shaped cutter 4 is provided on the tip end side of the cutter 4. The cutter 4 has a center bit 2 at the center and a plurality of cutter bits 3 around the center bit 2.

The cutter 4 is rotatably supported within a cylindrical casing 5 and rotationally driven by a drive motor 7 via a transmission drive mechanism 6 (swivel bearing, gear, etc.).

At the rear of the cutter 4 (on the right side in Fig. 1), a chamber 8 is formed to take in the excavated earth and sand, and within this chamber 8 is the tip of a belt conveyor 9 for sending the earth and sand backward. It has been inserted.

Further, on the surface of the cutter 4, a plurality of discharge ports 10 for discharging the fluid additive are formed, and a supply pipe for supplying the fluid additive from the rear of the chamber 8 is provided to the discharge port IO. 11 are connected.

Further, at the rear of the chamber 8, a folding jack 12 for digging the shield main body l and a shield jack 13 are provided.

Further, 14 is an erector, and 115 is a hydraulic motor for the erector.

With the above configuration, while the shield body 1 is being excavated, the fluid additive is sequentially released onto the surface of the cutter 4 to act as a lubricant, so that the cut earth and sand are transferred to the center bit 2 and the cutter. It is possible to effectively prevent dirt particles from adhering to the bit 3 and the like, and to efficiently take dirt particles into the chamber 8.

〔Effect of the invention〕

As described above, in a shield type excavator in which a cutter is rotatably supported on the front part of a shield body, a fluid additive is released to the front face of the cutter provided with the cutter bit. Since the discharge port is provided, the dirt particles can be prevented from adhering to the vicinity of the cutter, and the dirt particles can be efficiently taken into the chamber, and therefore, the excavation work can be carried out efficiently.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a shield main body embodying the present invention, and FIG. 2 is a front view of FIG. 1.

Claims (1)

[Claims] A shield type excavator comprising a cutter rotatably supported at the front part of a shield body, characterized in that a discharge port for discharging a fluid additive is provided on the front face of the cutter provided with the cutter bit. Shield type excavator.