JPH04327614A - Device for suspending hose of excavator - Google Patents

Abstract

PURPOSE:To provide a sufficient telescopic stroke by the use of a single winding rope and a winch for one piece of hose or the like in a crane with a boom of relatively short length. CONSTITUTION:In an excavator which is suspended from the end of a boom of a mobile crane to perform excavation in the ground, a hose 1 such as a hydraulic hose for pressure oil supply with its one end connected to the body of a crane is wound around a plurality of rows of fixed sheaves 2 and a plurality of rows of movable sheaves 3, following which the other end of the hose 1 is connected to the excavator 4 and the movable sheaves 3 are made movable in the vertical direction by means of a winch 5 through a winding rope 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension device for a hydraulic hose or the like for supplying pressure oil for driving a drilling tool in an excavator.

0002

[Prior Art] In an excavator that performs underground excavation by suspending the excavator from the tip of the boom of a mobile crane, a hydraulic hose for supplying pressure oil to drive the excavation tool and a lead for sending signals are used. The hoses that house the wires (hereinafter simply referred to as hoses) require a considerable length from the main unit's hydraulic power source or power source to the excavation tool, and when the excavation tool is inserted deep underground, it is difficult to move. In order to follow, an expansion and contraction stroke corresponding to the digging depth is required.

Conventionally, as shown in FIG. 3, a large crane is used, the length of the boom 11 is made long, and wire ropes 13a, 13b are used to connect the boom 11 through guide sheaves 12a, 12b provided in the middle of the boom 11. A plurality of hose guide sheaves 14a and 14b are suspended, and the wire rope 13
a and 13b are winches 15 installed on the crane body.
By winding or unwinding the hose guide sheaves 14a and 15b individually, the plurality of hose guide sheaves 14a and 14b can be raised and lowered individually. It was designed to follow the stroke.

[0004] In this way, in order to increase the extension stroke of the hoses 1, the length of the boom must be made as long as possible, and for this purpose it is necessary to use as large a crane as possible, and one The problem is that multiple hose guide sheaves that can be raised and lowered individually must be installed for the hoses, and multiple hoisting ropes and multiple winches corresponding to the number of hose guide sheaves are required. there were.

[0005]

[Problems to be Solved by the Invention] It is an object of the present invention to solve the above-mentioned problems of the prior art. Hoses that can be used in excavators to obtain a sufficient expansion and contraction stroke using a crane with a relatively short boom without using a large crane with a long boom, and with a single hoisting rope and winch for one hose. The purpose of the present invention is to provide a suspension device.

[0006]

[Means for Solving the Problems] The present invention provides means for solving the above problems, and is an excavator of the type that performs underground excavation by suspending the excavator from the tip of the boom of a mobile crane. In this step, a hose 1 whose one end is connected to the crane body is suspended around multiple rows of fixed sheaves 2 and multiple rows of movable sheaves 3, and then the other end is connected to an excavator 4, and the movable sheave 3 is connected to the excavator 4. The gist of the invention is a suspension device for hoses in an excavator, which is characterized in that it can be moved up and down by a single winch 5 via a hoisting rope 6.

[0007]

Embodiment FIGS. 1 and 2 show an embodiment of the present invention.

[0008] Reference numerals 1 and 1' denote hoses each having one end connected to the crane body, one of which is a hydraulic hose for supplying pressure oil, and the other 1' is a signal hose containing bundled lead wires. It is a hose, and both other ends are connected to the excavator 4.

[0009] Reference numerals 2 and 2' each include a plurality of rows of fixed sheaves, which are fixed in front of the crane main body by appropriate means. 3, 3' are movable sheaves in multiple rows, and the hoisting ropes 6, 3' are moved by winches 5, 5'.
6', from upper limit position A to lower limit position B
It can be raised and lowered freely. S indicates the vertical stroke.

[0010] The hoses 1 (with one end connected to the main body)
1') are respectively suspended from the movable sheave 3 (3') and the fixed sheave 2 (2') via the hose guide 1a (1a'), and then the other end is connected to the upper part of the excavator 4. There is.

Note that 7 and 7' in the figure are the hoisting ropes 6 and 7'.
6' is a boom top sheave for guiding, 8 is a hoisting rope of the excavator 4, 9 is a boom top sheave for guiding the hoisting rope 8, 10 is a winch for hoisting the excavator 4, and 11 is a crane boom. .

0012

[Operation] If the number of windings of hoses 1 (1') around fixed sheave 2 (2') and movable sheave 3 (3') is multiplied by n, and the vertical stroke of movable sheave 3 (3') is S, then excavation The vertical stroke of machine 4 is n×S.

[0013] Therefore, by appropriately selecting the number n of windings, even if the stroke of the excavator 4 becomes large, the expansion and contraction stroke of the hoses 1 can be easily followed.

Since the number of windings n is equal to the number of sheave rows of the fixed sheave 2 and the movable sheave 3, the lifting stroke S of the movable sheave 3 can be reduced by increasing the number n of sheave rows. The overall height is lower and more compact. This compactness allows the use of a crane with a small working radius and short boom length, making it possible to perform the same excavation work with a crane that is one class smaller than conventional cranes.

According to the present invention, after the hose 1 whose one end is connected to the crane body is suspended between the multiple rows of fixed sheaves 2 and the multiple rows of movable sheaves 3, the other end is connected to the excavator 4. By connecting the movable sheave 3 to the winch 5 and making it possible to move it up and down via the hoisting rope 6, the movable sheave 3 can be moved up and down by a crane with a relatively short boom without using a large crane with a long boom. A single hoisting rope 6 and a single winch 5 can provide a sufficient telescopic stroke for each hose 1.

[Brief explanation of drawings]

FIG. 1 is an overall side view.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of a conventional example.

[Explanation of symbols]

1 Hoses 2 Fixed sheave 3 Movable sheave 4 Excavator 5 Winch 6 Hoisting rope 7 Boom top sheave for guiding the hoisting rope 8 Excavator hoisting rope 9 Boom top sheave for guiding the excavator hoisting rope 10
Excavator hoisting rope winch 11 boom

Claims (1)

[Claims] [Claim 1] In an excavator of the type that performs underground excavation by suspending the excavator from the tip of the boom of a mobile crane,
Hoses connected at one end to the crane body are suspended between multiple rows of fixed sheaves and multiple rows of movable sheaves, and then the other end is connected to an excavator, and the movable sheaves are hoisted with a single winch. A suspension device for hoses in an excavator, characterized by being able to move up and down freely via a rope.