JPH0542153Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to the structure of a telescopic boom for a drilling machine to support a guide shell, and streamlines the hose support to prevent the hose from sagging in the telescopic part of the boom. This makes it possible to install it in a specific manner.

[Conventional technology]

In recent years, with the advent of hydraulic rock drills, the drilling speed has increased significantly compared to pneumatic rock drills, making it possible to drill holes with the same cross-section using fewer rock drills. For this reason, telescopic booms have been widely used to cover a wide area. In a drilling machine equipped with such a telescopic boom, a hydraulic hose for driving the rock drill mounted on the guide shell and other hoses are arranged around the boom.
In order to accommodate the expansion and contraction of the boom, the piping was installed to match the length of the boom when it was extended, and the boom was installed so that when the boom was shortened, there was slack in the expansion and contraction part of the boom.

[Problem that the invention attempts to solve]

However, such slack in the hose
When drilling the lower part of the face, the boom is dragged on the ground, and in the case of a boom with a guide shell rotary function, when the guide shell is rotated downward, it interferes with the guide shell, which reduces the workability of the boom. decrease. Moreover, the hose is prone to wear and breakage, and once breakage occurs, it takes time to repair it, reducing the efficiency of the drilling operation.

This invention solves such problems in telescopic booms for drilling machines.

Therefore, the purpose of this invention is to provide a telescoping boom for a drilling machine that can rationally install a hose support that prevents the hose from sagging, and that improves workability without causing wear or damage to the hose. shall be.

[Means for solving problems]

In the telescopic boom for a drilling machine of this invention, a fixed boom is constructed by fixing two boom members side by side on the left and right at a predetermined interval, and a movable boom is installed in the fixed boom space formed between the boom members of the fixed boom. and an articulated hose support that is laid along the movable boom and folded back at the rear end of the movable boom.

[Effect]

The bendable hose support is folded back and
An extra length for expansion and contraction is laid within the fixed boom space. Therefore, even when the boom is shortened, the hose housed in the hose support body is supported without sagging, and there is no risk of breakage or deterioration of workability.

〔Example〕

Hereinafter, embodiments of this invention will be described with reference to the drawings. FIG. 1 is a side view of a telescopic boom for a drilling machine which is an embodiment of this invention, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view taken along the line -- in FIG.

In this embodiment, a boom receiver 2 is pivotally attached to the base of a drilling machine (not shown) by a pivot shaft 3, and the base end of a fixed boom 5 of a telescoping boom 4 is connected to a depression shaft 6 on this boom receiver 2. It is pivotally mounted. A swing cylinder (not shown) is provided between the base and the boom receiver 2, and a depression cylinder 7 is provided between the boom receiver 2 and the fixed boom 5, and the extension and contraction of the cylinder causes the telescopic boom 4 to rotate and descend. It is becoming possible to suppress it.

A tilt arm 8 is pivotally attached to the tip of a movable boom 11 of the telescoping boom 4 via a tilt shaft 9, and a tilt cylinder 10 is provided between the movable boom 11 and the movable boom 11 to enable tilting. This tilt arm 8 is provided with a guide shell (not shown) via a swing arm and guide mounting.

The fixed boom 5 includes two boom members 5a and 5b.
are arranged side by side on the left and right at a predetermined interval, and the fixing members 12a, 1
2b, and two boom members 5
A fixed boom space 13 is formed between a and 5b. A movable boom holder 14 is fixed to the front end of the fixed boom 5.
A mobile boom 11 is slidably supported within 4. Boom telescoping cylinders 15a, 15b are provided inside the boom members 5a, 5b, and their front ends are attached to brackets 16a, 16b protruding from the side surface of the movable boom 11. Mobile boom 1 by expansion and contraction
Move 1 forward or backward.

Along the movable boom, a hose support 17 with an articulated structure has one end fixed to the front end of the movable boom 11.
The rear part of the hose support 17 is folded back at the rear end of the movable boom 11 and laid in the fixed boom space 13, and the other end is fixed to the fixing member 12a of the fixed boom 5. Hose support 1
7 is a link chain 18 and a large number of hoses 20 inside.
can be supported.

As shown in FIG. 4, when the movable boom 11 moves from the retreat position A to the forward position B, the hose support 17 moves within the fixed boom 5 without hanging down.

[Effect of idea]

Since the telescopic boom for a drilling machine of this invention is constructed as described above, the hose support that prevents the hose from sagging can be rationally installed inside the fixed boom, making it easy to move the boom and moving the hose. Work efficiency can be improved because no wear or damage occurs.

[Brief explanation of drawings]

Fig. 1 is a side view of a boom for a drilling machine which is an embodiment of this invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along the line - - in Fig. 1, and Fig. 4 is a boom when the boom is extended and retracted. It is an explanatory view showing the state of the hose support body of. In the figure, 4 is a telescopic boom, 5 is a fixed boom, 5a,
5b is a boom member, 11 is a movable boom, 13 is a fixed boom space, and 17 is a hose support body.

Claims (1)

[Scope of utility model registration request] A fixed boom is constructed by fixing two boom members side by side at a predetermined interval on the left and right, and a movable boom and a movable boom are installed along the movable boom in the fixed boom space formed between the boom members of the fixed boom. A telescopic boom for a drilling machine, characterized in that a movable boom is provided with a hose support having an articulated structure that is folded back at the rear end.