JPS58524A - Counterweight attaching and detaching device for pile driver and the like - Google Patents

Abstract

PURPOSE:To attach or detach a counter weight without the needs for manual operations by making an A type frame cooperate having a winding winch and an oil-pressure cylinder with the counter weight to be attached to the rear part of the upper rotator of a pile driver, etc. CONSTITUTION:A counterweight 8 hung down on a sheave 12 is operated by a winding rope R laid to the sheave 12 through guide sheaves 5 and 10 from a winding winch 4. When removing the counter weight 8, the winding rope R is wound up by the winding winch 4, whereupon the counterweight 8 is lifted up and separated from a placing base 7. Then, an oil-pressure cylinder 9 is contracted while winding up the winding rope R in such a way as to keep an aperture between the counterweight 8 and the placing base 7, an A type frame 6 is moved depressing, and the counterweight 8 is moved to the rear of the placing base 7.

Description

[Detailed Description of the Invention] The present invention relates to a counterweight attachment/detachment device for a pile driver, etc.
More specifically, it is a pile that is equipped with a 4I upper cinch inside the upper rotating body and 7 doll frames on the upper part, and a counterweight is attached to the entire counterweight mounting area extending to the rear of the upper rotating body. This invention relates to a counterweight attachment/detachment device for a striking machine, etc.

In pile drivers, mobile cranes, etc., the nine counterweights attached to the rear of their upper revolving bodies are removed during transportation, so an armpit counterweight attachment/detaching device is required.

Therefore, the present applicant has proposed a counterweight attachment/detachment device capable of attaching/detaching a plurality of counterweights in Application No. IS 54-141986. This carantau weight attaching/detaching device has a chain block locking tool on the top of the doll 7 frame and the crane body (upper revolving body) between the top shaft of the doll 7 frame and the A-shaped frame. A chain block for suspending a counterweight is connected to the top shaft of the counterweight, the lifting operation of the counterweight is performed by extending the hydraulic cylinder, and the lifting operation of the counterweight is controlled by operating the chain block. It is configured to do so.

The counterweight attachment/detachment device allows multiple counterweights to be attached/detached without using a separate crane, and the counterweights can be safely fixed to the crane body while placed on the counterweight mounting base; Moreover, when attaching and detaching the counterweight, the counterweight is lifted using a hydraulic cylinder.
Since the suspension is carried out using a chain block, the effect of reducing the operating force of the chain block is achieved.

By the way, in the above-mentioned counterweight attachment/detaching device, when suspending the counterweight, the chain hoist must be manually operated, and this operation must be performed in the immediate vicinity of the counterweight being suspended). There are some problems with securing workers and safety.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a counterweight attachment/detachment device such as a pile driver that eliminates the need for a chain block that requires manual operation and makes it possible to more safely attach and detach a counterweight. It is something.

In order to achieve this object, the present invention includes a hoisting winch inside an upper rotating body, a doll frame on the upper part, and a counterweight mounted on a counterweight mounting base extending to the rear of the upper rotating body. A counterweight attaching/detaching device for a pile driver, etc., comprising: a hydraulic cylinder for hoisting a m-shaped frame interposed between the top shaft of the doll 7 and the upper revolving body; The frame includes a guide sheep attached to the top shaft of the frame and a sheave block having a locking device for the carrant weight. suspending and tightening the sheep block, and connecting the sheep block to the gown turret through its locking device, and raising and lowering the seven doll frames by the hydraulic cylinder and by the hoisting winch. Winding mouth -
The present invention is characterized in that the lifting and lowering operations of the counterweight are performed by winding and unwinding the counterweight.

The details of the present invention will be explained below with reference to the drawings.
FIG. 1 shows an overall side view of a pile driver equipped with a counterweight attaching/detaching device according to the present invention, and FIG. 2 shows a rear view of the counterweight mounting portion in FIG. 1. In the figure, an upper rotating body 2 is mounted on a lower traveling body 1, and the rotating body 2
An additional 70-piece bracket 5 for attaching a league (not shown) is attached to the front part of the front bracket 3. A hoisting winch 4 provided inside the upper revolving body 2 is attached to the upper part of the front bracket 3. Guide sheep 5 guiding the upper rope R
is installed. The guide sheep 5 has a hoisting rope R
It has a structure that allows it to slide in the axial direction in order to keep the lead angle uniform and to prevent irregular winding by the winding winch 4.

Further, the 0-doll frame 6, which has a leader elevating Mu-shaped frame 6 attached to the upper part of the upper revolving body 2, has a front leg 6A whose base is pivoted to the upper revolving body 2, and one end of which is attached to the tip of the front leg 6A. It consists of nine extendable and retractable rear legs 6B, which are pivotally connected at one end and the other end to the upper revolving body 2, respectively.

Further, an extending counterweight mounting table 7 is provided at the rear of the upper revolving structure 2, and a counterweight 8 is placed on the mounting table 7. Shows the stone.

The counterweight 8 is a bolt (not shown)
Can be removed from the upper revolving body 2 via the 11! ! is fixed.

However, the counterweight attachment/detachment device according to the present invention has the following features:
A hydraulic cylinder 9 for raising and lowering the doll frame interposed between the top of the doll frame 6 and the upper revolving body 2, a guide sheep 10 attached to the top of the doll frame 6, and a counterweight 8 that is engaged with the doll frame 6. The hoisting rope R fed from the upper quinch 4 via the guide sheave 5 is passed over the guide sheep 10 and sheave block 11 no. 7'12. It has a structure in which the Nittsuku 11 is suspended.

More specifically, in the hydraulic cylinder 9, the base end of the cylinder 9m is pivotally attached to the upper rotating body 2, and the tip of the piston rod 9B is pivotally connected to the front leg 6m and the rear leg 6B of the m-shaped frame 6. The top shaft 60 is connected to the top shaft 60. By expanding and contracting the piston rod 9B of the hydraulic tower 9, the arm-shaped frame 6 can be raised and lowered using the pivot point at the base end of the front leg 6 as a fulcrum. The top shaft 60 of the trench-shaped frame 6 moves in an arc by the expansion and contraction of the hydraulic cylinder 9.

Further, the guide sheep 10 is arranged on both sides of the piston rod 9B connecting portion of the hydraulic cylinder 9.

The sheave block 11 includes two #IC shinibs 12 inside thereof. The round hoisting rope & drawn out from the hoisting winch 4 via the guide sheep 5 is attached to one guide sheep 10 of the top shaft 60 of the M-shaped frame 6, each sheave 12 of the sheep block 11, and the top shaft 6C. The sheave block 11 is suspended so that the rope is passed over the other guide sheep 10 and the end of the rope is connected to the shaft 5 of the guide sheep 5.

At the bottom of the nine sheep block 11 is an eye-shaped bracket 1 which is a locking device! A hawk-shaped bracket 14 into which the eye-shaped bracket 15 is fitted is attached to the upper part of the weight 8.

and an eye-shaped bracket 13 and a hawk-shaped bracket 1
By inserting a connecting pin 15 into the bottle hole drilled in 4, the chassis 4 can be connected to the counterweight 8, and by removing the connecting pin 15, the two can be uncoupled.

Next, the process of attaching and detaching the counter 9-eight using the counterweight attaching and detaching device according to the present invention 1MK will be explained.

First, as shown in Figs. 1 and 2, the sheep block 11 and the counterweight 8 are connected via the eye-shaped bracket 15, the hawk-shaped bracket 14, and the connecting pin 15, and the bolts fixing the counterweight 8 are removed. 0
Next, the sheep block 11 and the counterweight 8 connected thereto are lifted by winding the hoisting rope R by the hoisting winch 4, and the counterweight 8 is separated from the counterweight table 7. Then, while winding up the hoisting rope R so that the distance between the counterweight 8, the counterweight mounting table 7, and K11 is maintained, the hydraulic cylinder 9 is contracted to move the mu-shaped frame 6 downward, and the counterweight 8 is moved up and down. Move it to the rear of the weight mounting table 7.

To attach the nine cow/tower weight 8 that was previously removed onto the counterweight mounting table 7, the above-mentioned procedure can be reversed. Therefore, in the counterweight attachment/detaching device according to the present invention,
The counterweight can be attached and detached by only one operator and one instructor, and there is no need to work near where the counterweight is suspended, so the attachment and detachment work can be carried out even more safely.

Although the above embodiment has been described with reference to the attachment and detachment of one counter 98, it is of course possible to attach and detach a plurality of counterweights. That is, once the removal or installation of the first counterweight is completed, the sheep block 11 may be replaced with the next counterweight and the same procedure as described above may be performed.

As explained above, according to the present invention, the chain hoist that requires manual operation is abolished, so the problem of securing workers can be solved.1. There is no need to work in the immediate vicinity of the hanging counterweight, so attachment and detachment work can be done more efficiently.

Brief explanation of the drawings □ Fig. 1 is an overall side view of a pile driver equipped with a counterweight attaching/detaching device according to the present invention, Fig. 2 is a rear view of the counterweight attachment part shown in Fig. FIG. 3 is an overall side view with weights removed.

2... Upper revolving body, 4... Hoisting winch, 6...
7-frame frame, 6C...Top shaft of 7-frame frame, 7.
... Karantau "Eight mounting table, 8... Counter weight, 9... Hydraulic cylinder for A-type frame elevation, 10
...Guide sheep, 11...Sheep block, 12.
...Sheave of sheave block, 13...Eye type bracket, 14...Hawk type bracket, 15...Connecting pin, R...Hoisting rope.

Patent applicant Hitachi Construction Machinery Co., Ltd. Agent: Patent Attorney Masami Akimoto Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A hoisting winch is provided inside the upper revolving body, a doll frame is provided on the upper part of the door, and the force 9 is extended to the rear of the upper revolving body.
/A counterweight attaching/detaching device for a pile driver or the like, which comprises a counterweight mounted on a towweight mounting table, and a hydraulic cylinder for raising and lowering the doll frame, which is interposed between the top shaft of the doll frame and the upper revolving body. and a guide sheep attached to the top shaft of the doll 7 frame, and a sheep block having a locking device to the counterweight, and a hoisting rope fed out from the hoisting winch is attached to the guide sheep and the sheep block. The sheep block is suspended from the sheep block, and the *"'-bu block is connected to the counterweight via the locking device 7, and the raising and lowering movement of the doll 7 and the hoisting are performed by the hydraulic cylinder. A counterweight attaching/detaching device for a pile driver, etc., characterized in that it is configured to perform lifting/lowering operations of a hoisting rope boat using a winch.