JP2569862Y2 - Pile driver lifting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile driver lifting device used when a worker lifts and lowers a leader in a pile driving preparation work, inspection and the like.

[0002]

2. Description of the Related Art A pile driving machine is composed of a lower traveling structure and an upper revolving structure, and a reader for mounting an earth auger, a hammer, etc. for pile driving work is provided in front of the upper revolving structure.

[0003] In the above-mentioned pile driving machine, conventionally, after the leader self-sustaining operation is completed, a pile driving preparation operation such as an assembling of an earth auger and a hammer, and addition and separation of a screw lot or the like generated during the pile driving operation. In order to perform inspections or the like, the worker must climb the leader and work. In this case, as shown in FIG. 7, when the upper revolving unit 20 is not turning, the worker uses the upper surface 21 a of the crawler 21 as the lower traveling unit as a scaffold and removes the leader bracket from the underframe upper surface 20 a of the upper revolving unit 20. Move to 22 and leader 2
3 had been reached. In addition, when the upper swing body 20 swings, even when the upper swing body 20 is at a position as shown in FIG. 8, the worker can reach the reader 23 in the order described above. As another method, a ladder may be leaned on the reader 23 from the ground, and the worker may climb directly to the reader 23.

[0004]

However, in the case described above, if the upper swing body 20 is located far away from the crawler 21 as shown in FIG. Must move from the crawler 21 to the roof 24 of the equipment outer panel.
Due to the large step between the roof 24 and the
It was not easy to switch to, and it was not preferable from the viewpoint of work safety.

When a ladder leans on the leader 23 from the ground and the worker climbs directly to the leader, the ground on which the ladder is grounded is often muddy or uneven, and the leader 23 and the upper part of the ladder are often grounded. There was a problem in safety management due to unstable contact with the ship.

Accordingly, the present invention provides a lifting device for a pile driver which allows a worker to safely and quickly move up and down to a leader regardless of the positional relationship between a lower traveling structure and an upper revolving structure of the pile driver. It is intended to be.

[0007]

In order to achieve the above object, a lifting device for a pile driver according to the present invention is provided on an upper part of a lower traveling body.
In a pile driver in which an upper revolving structure is rotatably disposed and a leader bracket for supporting a leader is provided in front of the upper revolving structure, a landing is provided on the leader bracket, and a ladder lock is provided on the landing. A member is attached, and a ladder bar is detachably hooked to the ladder locking member.

[0008]

As described above, since the ladder beam is hung on the ladder locking member of the landing which is attached to the leader bracket in advance, the ladder is stabilized. The height from the ground to the lower end of the ladder can be adjusted by selecting the ladder bar to be hooked on the ladder locking member.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention.
The pile driving machine 1 includes a lower traveling body 3 traveling by a crawler 2.
The revolving superstructure 4 is provided so as to be rotatable on the upper part of the upper revolving body 4, and a leader bracket 5 is protruded from a front portion of the upper revolving superstructure 4. A leader 6 is erected on the leader bracket 5, and the leader 6 is supported by two back stays 7, 7 from the rear of the upper swing body 4.

In order to support the leader 6 on the upper revolving unit 4, the front part of the leader bracket 5 has a bifurcated structure of a flat fork shape. The landing 9 is detachably attached by the pins 8.

[0011] The landing 9 is a rectangular frame 9 formed of a mold rope.
a is formed by stretching an expanded metal 9b on one side, and one side is mounted on the leader bracket 5, and a ladder locking member 10 is mounted on the other side opposite to the vehicle body mounting side. The ladder locking member 10 has an upward hook 1
Two sets 0a are protruded in the left-right direction, and the ladder 11 is hooked on the hook 10a.

The ladder 11 is formed in an inverted J-shape with its upper part turned up, and two crosspieces 11a, 11a are connected to the hooks 10a,
10a. In addition, the length of the ladder 11 is such that the uppermost bar 11a and the next bar 11a are hooks 10a,
The lower end is formed to a length that does not interfere with the ground when hooked on 10a.

The pile driving machine 1 as described above has a landing 9 and a ladder 1.
1 is removed, the main body and the leader 6 are disassembled and placed on a truck or the like for transportation. When the main body is assembled at the work site, the landing 9 is attached to the leader bracket 5 by the pins 8. When the self-supporting operation of the leader 6 is completed and the auger driving device, the hammer device and the like are assembled or disassembled into the leader 6, so-called preparation for pile driving and dismantling work, the worker needs to hold the ladder 11 from the ground from the ground. The worker can directly climb on the leader bracket 5 from the ground by hooking 11a, 11a on the ladder locking member 10 of the landing 9. Thus, the worker can quickly climb the leader bracket 5 when the leader 6 needs to be inspected or the like, regardless of the turning position relationship between the lower traveling body 3 and the upper rotating body 4. Further, the ladder 11 is provided with the ladder locking member 10.
The hook 10a of the ladder 11 allows the worker to safely climb to the leader bracket 5 irrespective of unevenness or mud on the ground under the ladder 11.

When turning the upper revolving unit 4 during the operation, the worker pulls up the ladder 11 at the landing 9 and re-hangs the lower bars 11a, 11a on the ladder locking member 10. The lower end of the ladder 11 can be prevented from interfering with the crawler 2.

The landing is not limited to one that is removably attached to the leader bracket as in the above-described embodiment, but may be one that is fixed to the leader bracket.

[0016]

As described above, according to the present invention, a landing is provided on the leader bracket of the upper revolving structure, a ladder locking member is attached to the landing, and the ladder rail is detachably attached to the ladder locking member. Since the locking is performed, the worker can safely and quickly climb the leader bracket regardless of the positional relationship between the lower traveling structure and the upper revolving structure with a simple structure.

[0017] Further, by changing the ladder rail to be hooked on the ladder locking member, the distance between the lower end of the ladder and the ground can be adjusted. Interference with the lower traveling body can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing an embodiment of the present invention.

FIG. 2 is a front view of the same main part.

FIG. 3 is a plan view of the same main part.

FIG. 4 is a perspective view of the same main part.

FIG. 5 is a side view of a main part of the pile driver.

FIG. 6 is a front view of a main part of the pile driver.

FIG. 7 is a plan view of a main part showing a positional relationship between the lower traveling structure and the upper rotating body.

FIG. 8 is a plan view of the same main part.

FIG. 9 is a plan view of the same main part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Piling machine, 2 ... Crawler, 3 ... Lower traveling body, 4 ... Upper revolving body, 5 ... Leader bracket, 6 ... Leader, 7 ... Back stay, 8 ... Pin, 9 ... Landing, 9a ... Frame body, 9b ... Expanded metal, 10 ... Ladder locking member, 10a ... Hook, 11 ... Ladder, 11a ... Bar

Claims (1)

(57) [Scope of request for utility model registration] 1. A pile driver in which an upper revolving structure is rotatably disposed above a lower traveling structure, and a leader bracket for supporting a leader is provided in front of the upper revolving structure. A lifting device for a pile driver, wherein a landing is provided, a ladder locking member is attached to the landing, and a ladder bar is detachably hooked to the ladder locking member.