JP2000345786A - Hanger for excavating tool in hydraulic type or mechanical type crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable vertical excavation without being subjected to the effect of a neighborhood house and an obstruction or the like just near a structure by hanging down a main wire for a main hoist installed to a crane body into a hanging member from a sheave on the boom-head section lower side and conducting excavation by winding a hanging-down sheave mounted on an excavating tool. SOLUTION: A pair of brackets 2 are provided droopingly at the head section of a boom 1 for the hydraulic type crane or the like. A large number of square cylindrical bodies 3a-3b are fitted in an extensible manner at multistages, the uppermost section 3a of a hanging-down member 3 constituted by connecting each square cylindrical body is fixed to the brackets 2, and an earth auger 4 is suspended from the lowermost section 3b. A main wire wound on a main hoist is hung down into the hanging-down member 3 from a sheave set up on the head-section lower side of the boom 1, a hanging-down sheave 8 fitted to the earth auger 4 is wound, the main wire is wound up and wound down by starting the main hoist, and the hanging-down member 3 unified with the earth auger 4 is expanded and contracted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for suspending an excavator such as an earth auger or a club bucket attached to a boom of a hydraulic or mechanical crane (crawler crane).

[0002]

2. Description of the Related Art The invention according to Japanese Patent Application Laid-Open No. 5-247927 discloses a top sheave bracket attached to a swivelable crane boom, a leader hanging down from the top sheave bracket, and a vertical guide engaged with a guide provided on the leader. A movable excavation unit carriage, a multi-axis excavation unit mounted on the excavation unit carriage and supported by a top sheave bracket so as to be vertically movable, and an excavation head mounted downward from the multi-axis excavation unit.
In addition, a number of cranes in which a ground auger is vertically movably held by a leader are described in JP-A-9-256362 and the like.

[0003] One of the excavation methods is the SKT method (scat method), in which the earth auger suspended at the tip of the crane boom is moved to a desired position by undulation and expansion and contraction of the crane boom, and is excavated by moving up and down.

[0004]

SUMMARY OF THE INVENTION Problems to be Solved by the Invention
The invention according to Japanese Patent No. 927 and the like requires a leader, and the equipment is large and heavy, the working radius cannot be obtained, and small turning is not possible.

[0005] In the SKT method, if there is an obstacle such as a relatively low electric wire at the construction site, it is extremely difficult to perform the construction by moving the crane boom over the obstacle, and the work is performed under the overhead line. In some cases, construction may not be possible. In addition, since the earth auger suspended from the crane boom tip is moved up and down by the combined movement of the crane boom's undulation and expansion and contraction, it is extremely difficult to construct at places close to structures such as houses, and has verticality. Drilling is difficult. Furthermore, since the construction method is only for hydraulic cranes, the work site has a large working radius or a large-diameter hole,
It cannot be used for long holes.

[0006]

SUMMARY OF THE INVENTION A bracket is attached to the boom head of a hydraulic crane or a crawler crane, and the uppermost part of a suspending member in which a large number of rectangular cylinders are telescopically fitted and connected is attached to the bracket. Attach an excavation tool such as an earth auger or a club bucket to the lowermost part of the suspension member, and hang the main wire of the main hoisting device provided on the crane body from the sheave below the boom head into the suspension member. , The main wire is wound up and down by activating the main hoisting device, and a large number of rectangular cylinders integrated with the digging tool such as an earth auger or a club bucket. By expanding and contracting, construction can be done safely and quickly when there are obstacles such as relatively low electric wires at the construction site, and to structures such as neighboring houses. The approaching construction is not affected by obstacles or construction conditions, so drilling and excavation with verticality is possible, and it can be mounted on a crawler crane. The purpose is to drill holes.

[0007]

FIG. 1 is a perspective view of the apparatus of the present invention showing a state in which an earth auger is suspended and a large number of rectangular cylinders are most reduced. FIGS. FIG. 2 is a partially sectional perspective view of the device of the present invention in an extended state.

[0008] A pair of brackets 2 are suspended from the head of a boom 1 of a hydraulic crane or a crawler crane, and a large number of rectangular cylinders 3a to 3b are fitted in multiple stages so as to be extendable and contractable. The uppermost portion 3a of the hanging member 3 formed by connection is fixed to the bracket 2, and the earth auger 4 is hung on the lowermost portion 3b. A main wire 6 wound around a main hoisting device 5 (shown in FIG. 5) mounted on a crane truck is hung from a sheave 7 provided below the head of the boom 1 into the hanging member 3, By winding the hanging sheave 8 attached to the earth auger 4 and starting up and lowering the main wire 6 by activating the main hoisting device 5, each of the rectangular cylindrical bodies 3 a to 3 g to be integrated with the earth auger 4 and connected in multiple stages. The suspension member 3 made of 3b is expanded and contracted. Although not shown, an excavator such as a club bucket can be mounted on the lowermost rectangular cylindrical body 3b of the suspension member 3 instead of the earth auger 4 to be used as an excavator, or a small backhoe (commonly called Yumbo) is used. By installing the improved device of the present invention, large excavation and excavation can be performed in a narrow work area. In the drawing, reference numeral 9 denotes a sub-wire, which serves as a main wire when used for loading / unloading, assembling or disassembling a machine, hanging a pile, or the like.

[0009]

According to the present invention, the excavating tool such as the earth auger 4 and the club bucket is raised and lowered vertically by extending and retracting the suspension member 3 so that the excavating tool is not affected by obstacles or construction conditions in the immediate vicinity of a nearby house or structure. Drilling, drilling can be performed. Even if there is an obstacle such as a relatively low electric wire in front, the hanging member 3 is lifted to easily move the earth auger 4 from the electric wire or the like, or to slip under the electric wire or the like so as to excavate or excavate a desired place. Can be constructed safely and quickly.
In addition, vertical construction can be easily performed from low altitude to desired high altitude, and it can be installed on crawler cranes. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of a device of the present invention showing a state where an earth auger is lifted.

FIG. 2 is a perspective view of the device of the present invention showing a state where an earth auger is suspended.

FIG. 3 is a partially sectional perspective view showing the apparatus of the present invention in a state where an earth auger is hung on a boom head of a crane.

FIG. 4 is a partially cutaway front view showing a winding mechanism.

FIG. 5 is a perspective view showing a crane vehicle on which the device of the present invention is mounted.

[Explanation of symbols]

1 Boom 2 Bracket 3 Suspension member
4 Earth auger 5 Main hoisting device 6 Main wire 7 Sheave 8 Hanging sheave

Claims (1)

[Claims] 1. A bracket is attached to a boom head of a crane, and an upper portion of a hanging member in which a large number of rectangular cylinders are telescopically fitted and connected is attached to the bracket, and an earth auger or a club bucket is attached to a lower portion of the hanging member. The main wire of the main hoisting device provided on the crane body is hung from the sheave below the boom head into the hanging member, and the hanging sheave attached to the excavating tool is wound. An excavating device for a hydraulic or mechanical crane, which performs excavation with verticality.