JP3174454B2 - Method and device for installing and removing leader from pile driver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for attaching and detaching a leader of a pile driver using a separate crane.

[0002]

2. Description of the Related Art FIG. 7 is a side view showing a state in which a leader of a conventional pile driver is attached to a main body, FIG. 8A is a side view showing a state before the leader is erected, and FIGS. C) is a side view showing a state in which the reader is being erected. As shown in FIG. 7, the lower part of the leader 2 is pivotally connected to the front bracket 1A at the front of the main body 1 of the pile driving machine.
Is supported by a pair of left and right buck stays-3 connected by pins between the upper portion and the rear portion of the main body 1, and is mounted upright. Reference numeral 4 denotes a leader hoisting rope, and the leader hoisting rope 4 is a bracket 2a having one end provided substantially at the center of the leader 2.
And the other end is wound up by a winch 20 provided on the main body 1. Reference numeral 5 denotes an auger device attached to the leader 2, reference numeral 6 denotes a screw auger, and reference numeral 7 denotes a rear jack for supporting the back stay-3.

As shown in FIG. 8A, generally, a leader 2 of a pile driver is assembled on the ground, and the upper end of a back stay 3 is connected to a mounting member 22 of the leader 2 and connected to the front bracket 1A. Then, it is raised from the state horizontally placed on the receiving stand 8 and the auxiliary stand 9 to the vertical state shown in FIG. At this time, if the leader 2 is short, it is possible to cause the leader 2 by itself by winding the leader up / down rope 4 with the winch 20.
If it becomes long, it cannot be caused by itself from the horizontal state. Therefore, when the leader 2 is long, the crane (not shown) separates the leader 2 using the wire rope 11.

When a separate crane is used, a bracket 2b is provided near the bracket 2a, and a leader suspension rope 10 as shown in a perspective view of FIG. 10a is connected by a pin or the like and attached, and a hook 11a of a crane is attached to a ring-shaped connecting portion 10b formed at the other end of the hanging rope 10.
The reader 2 is raised by winding up the hook.

[0005] In this case, the leader hoisting rope 4 is wound up by the winch 20 in accordance with the movement of the leader 2 by the crane from the state shown in FIG. Then, as shown in FIG.
When the leader 2 rises to an angle that can support the robot, the hoisting by the crane is stopped, and the worker 12
The hook 11a is hung up the ladder attached to
Remove from the ring-shaped connecting portion 10b of the “0”. And FIG.
As shown in (C), the suspension rope 10 is stored on the back of the leader 2, the tip of the hydraulic cylinder 3a of the back stay 3 is fixed to a predetermined position of the rear jack 7, and the hydraulic cylinder 3a is contracted. Auxiliary stand 9 with reader 2 vertical
Remove. When removing the reader 2 from the main body 1, the worker 12 climbs again to the height of the hanging rope 10 and
1a is hung on the connection part 10b, and the reader 2 is hung down.

[0006]

As described above, conventionally, the hook 11a of the crane is connected to the ring 1 of the hanging rope 10.
As shown in FIG. 8 (B), the worker 12 climbs a ladder provided on the back of the reader 2 to perform a dangerous hook attaching / detaching operation at a height of 15 m to 25 m from the ground as shown in FIG. Had to do. In addition, since it is difficult for the crane operator to confirm a signal indicating the detachment state of the hook 11a from the worker 12 who works at a high place, the work coordination is poor and the work takes time. There was a point.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a method and an apparatus for attaching and detaching a leader of a pile driver in which the work of attaching and detaching a crane hook from a leader hanging rope can be performed safely and efficiently near the ground. The purpose is to:

[0008]

According to the present invention, there is provided a method for attaching and detaching a leader of a pile driver, wherein the leader of the pile driver is attached to and detached from the main body of the pile driver using a separate crane. A support member for hanging the flexible member slidably or rolling is attached, and one end is rotatably connected to the main body of the pile driver, and when the leader placed horizontally is erected, the support is provided. One end of the flexible member is hung on the member, and the other end of the flexible member is fixed to a support member provided on the lower part of the reader or on the main body, and a crane is connected to the connecting portion provided on the one end of the flexible member. Hook, lift the leader in the upright direction with a crane, raise the leader to an angle that can be supported by the leader hoisting rope of the pile driver, then support the leader with the leader hoisting rope, and crane the crane hook With the one end of the sexual member Remove the hook from the connection part near the ground, remove the leader from the main body of the pile driver, hook the hook again on the connection part near the ground, wind up the hook and raise the connection part, The other end of the bendable member is suspended by a crane in a direction in which the leader is tilted in a state where the other end of the bendable member is fixed to the lower part of the leader or the support member provided on the main body.

Further, a leader mounting / removing device for a pile driver according to the present invention has a leader hanging rope having a crane hook connection portion at one end and a connection portion to the main body or the leader at the other end, and a back surface of the leader. A support member provided on the lower portion of the suspension rope to slidably or roll freely, a bracket provided on the lower part of the reader or the main body to detachably connect a connection portion at the other end of the suspension rope, and the suspension rope And a rope that is connected to the other end and pulls down the other end of the hanging rope.

[0010]

According to the method of the present invention, when a long flexible member such as a wire rope connected to a hook of a crane is used and the hook is detached from the connection portion of the flexible member,
Since the connection portion is lowered near the ground, the hook can be detached near the ground.

In the apparatus of the present invention, when the reader is attached to the main body, a crane hook is hooked on a connection portion at one end of the leader hanging rope, and the connection portion at the other end of the leader hanging rope is connected to the lower portion of the reader or the main body. In the state where the leader is raised to the angle that the leader can be supported by the leader hoisting rope by winding up the hook, and the reader is raised to that angle, the connection part at the other end of the leader hanging rope is removed from the bracket, When the hook of the crane is extended, the connection portion of one end of the leader suspension rope is lowered to the vicinity of the ground together with the hook, and the work of removing the hook of the crane can be performed near the ground. When removing the leader, a hook is hung on the connection portion at one end of the hanging rope descending near the ground, and the pull-down rope is pulled up from the vicinity of the ground while the hook is being hoisted by a crane, and the other end of the hanging rope is pulled down. Then, the connecting portion on the other end side of the hanging rope is connected to the bracket provided on the lower part of the reader or on the main body, and in this state, the hook is extended to lower the reader.

[0012]

FIG. 1 is a side view showing an example of an apparatus for carrying out a method for attaching and detaching a leader of a pile driver according to the present invention in a horizontal state before the leader is erected. FIG. FIG. 3B is an enlarged cross-sectional view, FIG. 3B is a side view showing a state in which the reader of this embodiment is being erected, and FIG.
FIG. 5 is a side view showing a state in which the reader is mounted upright on the main body. 1, 3 and 4, the backstay 3 is not shown.

As shown in FIGS. 1 and 2, in this embodiment, a conventional pile driver is provided with a shaft 13 on the back side of the leader 2 (the surface on which the guide member of the auger device and the hammer is not attached). A bracket 15 to which a sheave 14 which is a support member of the flexible member is attached, and a bracket 16 which is another support member of the flexible member is fixed below the reader 2.
A connecting portion 18a at one end of a leader hanging rope 18 which is a flexible member is detachably connected to the bracket 16 with a pin 17, and a ring-shaped connecting portion 18b at the other end of the hanging rope 18 is wound around the sheave 14. . Reference numeral 19 denotes a rope for pulling down the connecting portion 18a of the hanging rope 18, which is connected to one end of the hanging rope 18 near the connecting portion 18b in a state where one end of the rope 19 is hung around the sheave 14, and the other end is hung. The other end of the rope 18 is tied to the vicinity of the connection portion 18a.

At the time of mounting the reader 2, as shown in FIG. 1, the connecting portion 18b of the hanging rope 18 is hooked on a hook 11a of a separate crane, and the horizontal
Is lifted by a crane, and as shown in FIG. 3, the leader hoisting rope 4 is wound up by the winch 20 in accordance with the cause of the leader 2. And FIG.
When the leader 2 rises to an angle at which the leader 2 can be supported by the leader hoisting rope 4, the lifting of the hook 11a of the crane is stopped, and the leader 2 is supported by the leader hoisting rope 4. And the bracket 16
From the other end of the hanging rope 18
8a is removed from the bracket 16 and the hook 11a of the crane is extended to connect the connecting portion 1 of one end of the hanging rope 18.
The hook 11a with the hook 8b is lowered to near the ground. Thereby, the other end of the hanging rope 18 is raised as shown in FIG. As shown in FIG. 5, when the connecting portion 8b is lowered to near the ground, the worker removes the hook 11a from the connecting portion 18b of the hanging rope 18, moves the crane, and fixes the backstay 3 to the main body 1 in the same manner as described above. Then, the auxiliary gantry 9 is removed with the reader 2 placed vertically. In order to prevent the suspension rope 18 from swinging during the pile driving operation, and to prevent the connection part 18a of the suspension rope 18 pulled up near the bracket 15 from being lowered by its own weight, the connection part 18b is connected to the connection rope 18b. Other ropes and pins 1 on the bracket 16
Use 7 and so on.

After the pile driving operation is completed, the leader 2 is moved to the main body 1.
When removing from the crane hook 11a near the ground
Is hooked again on the connecting portion 18b of the hanging rope 18, the hook 11a is wound up, and the rope 19 is pulled down from the ground to lower the connecting portion 18a of the hanging rope 18, and the connecting portion 18a is connected to the bracket 16 with the pin 17. Then, the hook 11 of the crane
a and the leader hoisting rope 4 are paid out, and the leader 2 is turned down to return to a horizontal state, and is removed from the main body.

As described above, in the above embodiment, the hook 11a of the crane is connected to the connecting portion 1 at one end of the hanging rope 18.
8b, the work of attaching and detaching the hook 11a can be performed near the ground, so that the attaching and detaching work can be performed safely, and the worker 12 can easily inform the crane operator of the state of attachment and detachment of the hook 11a. Since the information can be transmitted, the cooperation between the worker 12 and the crane operator is improved, and the work can be performed quickly.

FIG. 6 shows a modification of the above embodiment.
(A) is an equivalent view. In this example, the sheave 14 is connected to the motor 2.
1 is driven. According to this example, by operating the motor 21, the connecting portion 18a of the suspension rope 18 that has risen near the sheave 14 can be lowered, so that the pulling rope 19 is not required.

In the above embodiment, the bracket 16 for connecting the connecting portion 18a at the other end of the hanging rope 18 is fixed to the lower portion of the reader 2 and the sheave 14 is attached to the bracket 15. The bracket 16 may be provided on the main body 1 side, and a roller or a slippery rod may be used instead of the sheave 14. In this case, the same effect as described above can be obtained. Further, instead of forming the bracket 16 by a single plate and using the connecting portion 18a of the suspension rope 18 as a fork and fitting the fork and the bracket 16 to each other, the bracket 16 is formed by a two-plate and connected. The structure may be such that the portion 18 a is pinned by being sandwiched between the brackets 16, or may be connected by bolts instead of the pins 17. In addition, a chain or a belt can be used as the suspension rope 18 in addition to the wire rope.

A sheave, a roller or a sprocket is rotatably mounted on the bracket 16 of the reader 2,
A structure in which a bendable member such as an endless leader hanging rope, belt or chain is looped between the sheave or the like and the sheave 14 (or a roller or a sprocket), and a hook connection portion is provided on the bendable member. It is also possible to take In this case, by lowering the hook 11a of the crane, the connection portion on which the hook 11a is hooked is lowered together with the hook 11a to near the ground, so that the same effect as described above can be obtained. This eliminates the work of attaching and detaching 18a from bracket 16 and the work of pulling down connection portion 18a, thereby improving workability.

[0020]

According to the first aspect, the work of attaching and detaching the hook of the crane from the connection portion at one end of the bendable member can be performed near the ground. Work can be done safely. In addition, since the worker performing the work of attaching and detaching the hook of the crane and the operator of the crane are improved, the work can be performed quickly and efficiently.

According to the second aspect, an apparatus for implementing the method of the first aspect can be provided at a low cost with a simple and easily available member.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an apparatus for performing a method of attaching and detaching a leader of a pile driver according to the present invention in a horizontal state before the leader is erected.

2A is an enlarged cross-sectional view taken along line XX of FIG. 1, and FIG. 2B is an enlarged view taken along arrow Y of FIG.

FIG. 3 is a side view showing a state in which the reader is being erected in the apparatus of the embodiment.

FIG. 4 In the apparatus of the embodiment, the reader is erected,
It is a side view showing the state where a hook was lowered to near the ground.

FIG. 5 is a side view showing the apparatus of this embodiment in a state where the reader is erected and attached to the main body.

FIG. 6 is a diagram corresponding to FIG. 2A showing a modification of the embodiment.

FIG. 7 is a side view showing a state where a leader of a conventional pile driver is attached to a main body.

FIG. 8A is a side view showing a conventional pile driver in a horizontal state before erecting the leader, and FIGS. 8B and 8C are side views showing a state in which the leader is being erect.

FIG. 9 is a perspective view of a conventional hanging rope.

[Explanation of symbols]

 11 Crane Wire Rope 11a Hook 12 Worker 13, 17 Pin 14 Sheave 15, 16 Bracket 18 Suspension Rope 19 Pull Down Rope

Claims (2)

(57) [Claims] When a leader of a pile driver is attached to and detached from a main body of the pile driver by using a separate crane, a support member for slidably or freely rolling a flexible member is attached to the back of the leader. In the meantime, when raising the horizontally placed leader with one end rotatably connected to the body of the pile driver, one end of the flexible member is hung on the support member, and The other end of the member is fixed to a support member provided on the lower part of the leader or the main body, a hook of a crane is hooked on a connection part provided on the one end of the flexible member, and the leader is lifted upright by the crane, and a pile driver is used. After the leader is raised to an angle at which the leader can be supported by the leader hoisting rope, the leader is supported by the leader hoisting rope, the hook of the crane is lowered together with the one end of the bendable member, and the hook is connected to the connection portion near the ground. Remove from Lee When removing from the main body of the pile driver, hook a hook on the connection portion again near the ground, wind up the hook and raise the connection portion, and then connect the other end side of the flexible member to the lower part of the reader or the main body. A method of attaching and detaching a leader of a pile driver, wherein the leader is suspended by a crane in a direction in which the leader is tilted while being fixed to the provided support member. 2. An apparatus for carrying out the method for attaching and detaching a leader of a pile driver according to claim 1, wherein the one end has a connection portion for a hook of a crane and the other end has a connection portion for a main body or a reader. A hanging rope, a support member provided on the back portion of the leader and slidably or rotatably hung one end of the hanging rope, and a connecting portion at the other end of the hanging rope provided on the lower part of the reader or the main body so as to be detachable. A mounting and dismounting device for a pile driver, comprising: a bracket to be fastened; and a rope connected to the hanging rope and pulling down the other end of the hanging rope.