JP3182333B2 - Pile driver leader lifting suspension equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for raising or lowering a leader using a separate crane when assembling or disassembling a pile driver.

[0002]

2. Description of the Related Art In a conventional pile driver, during assembly,
When erecting the reader with the lower end of the leader pinned to the front bracket, attach the leader hanging rope to the bracket provided on the back of the reader, hook the crane hook on the leader hanging rope, and operate the crane. After raising the leader to an angle that can be stably supported by the pile driver body, the lower end of the back stay is connected to the rear part of the pile driver body, and the worker climbs the ladder provided on the leader and the hook Then, the leader was lifted to a vertical position by a back stay cylinder and a leader hoisting rope provided on the pile driver body. Further, when disassembling the pile driver, after the leader is tilted down to the limit inclination angle that can be stably supported by the pile driver body, the worker climbs on the ladder and attaches the crane hook to the leader hanging rope. At the same time, the lower end of the back stay was detached from the connection at the rear of the pile driver body, and the leader was lowered to a horizontal position by a crane.

[0003] However, the attachment and detachment work of the hook and the leader hanging rope as described above is an altitude work performed by an operator at a height of 15 to 30 m from the ground by climbing a ladder provided on the back of the reader. .

In order to eliminate the need for such high-altitude work, the present inventors have developed a pile driving machine leader mounting device capable of efficiently attaching and detaching the crane rope to and from the leader near the ground. No. 197460. This device has a leader hanging rope having a crane hook connection portion at one end and a connection portion to the pile driver body or the leader at the other end, and slides one end of the suspension rope provided at the back portion of the leader. A support member (sheave) that is rotatably or rollably hung, a bracket provided at the lower part of the leader or the pile driver body to detachably attach a connection portion at the other end of the leader hanging rope, and at both ends of the leader hanging rope. It is equipped with a pilot rope that is connected at both ends and pulls down the bracket connection end side of the leader hanging rope.When erecting the leader, hook the connection part of the leader hanging rope on the hook of the crane and pull up the hook. By moving the leader hanging rope along the supporting member, the hook-side end of the leader hanging rope is raised, and at the same time, the other end is lowered. When the lower end of the rope is fastened to the pile driver body or the bracket at the bottom of the leader, the leader is erected by the operation of the crane with the upper end of the leader hanging rope hanging on the support member, and the hook of the crane is removed. Then, the connection between the lower end of the leader suspension rope and the bracket is released, the hook is lowered by the crane, and the pilot rope is extended to disconnect the connection between the hook and the leader suspension rope near the ground. On the other hand, when disassembling the pile driver, a hook is connected to the leader hanging rope near the ground, and the hook is pulled up to move the leader hanging rope along the support member, thereby raising the hook side end of the leader hanging rope. At the same time, the other end is lowered, the lower end of the leader hanging rope is again fixed to the bracket, and the leader is hung in the same connection state as when lifting, and the pilot rope is used for lifting and lowering the leader hanging rope. Was.

[0005]

However, in the device described in the above-mentioned publication, the leader hanging rope itself supports the leader, and therefore, the leader hanging rope is
It is necessary to use a member having a diameter large enough to support the weight of the leader, and further, it has a length longer than that between the lower part of the leader or the pile driver main body and the upper supporting member, so that the weight becomes large ( For example, when the diameter is about 36 mm, the weight becomes about 8 kg / m, and when the length is 30 m, it becomes 240 kg.) For this reason, the operation of the leader hanging rope becomes difficult, and there is a problem that a very large sheave must be used as a support member for hanging the leader hanging rope.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention can efficiently remove and attach a crane hook from a leader suspension rope near the ground, shorten the length of the leader suspension rope, and reduce the weight. It is an object of the present invention to provide a practical and practical device for lifting and suspending a leader of a pile driver.

[0007]

According to the first aspect of the present invention, the leader is lifted and suspended by a separate crane with the lower end of the leader pivotally attached to the front bracket of the pile driver. In the apparatus, a bracket having a pin hole is attached to the leader, and a connection fitting having a pin hole is provided at an end of the leader hanging rope connected to the wire rope of the crane, and the connection fitting is detachably fitted to the bracket. A remote-operated pin attaching / detaching device that inserts and removes pins into both pin holes with the connection fitting fitted to the bracket attached to the leader or bracket, A pilot rope connected to a connection fitting is provided, and the pilot rope is hung near an upper portion of the bracket of the reader. Becomes attached Ido wheel rotatably,
The pilot rope has a length substantially equal to or more than twice the height from the front bracket to the guide wheel, hangs the pilot rope on the guide wheel, and connects one end of the pilot rope to the connection fitting. By pulling down the other end of the pilot rope, the connection fitting is pulled up and the connection fitting is fitted to the bracket.

According to a second aspect of the present invention, a winch is provided as a means for winding and lowering the leader suspension rope according to the first aspect. According to a third aspect of the present invention, a guide is provided below the bracket to guide the fitting when the fitting is fitted to the bracket. According to a fourth aspect of the present invention, the remote-operated pin attaching / detaching device includes a hydraulic cylinder or an electric cylinder as an actuator.
The invention according to claim 5 is provided with a lock circuit for prohibiting release of pin connection between the connection fitting and the bracket in a state where the connection fitting is in the reader lifting posture.

[0009]

According to the first aspect of the present invention, when the leader is raised by the crane, one end of the leader hanging rope is hung on the hook of the crane, and the connection fitting at the other end of the leader hanging rope is fitted to the bracket provided on the reader, so that the pin is engaged. The connection fitting is connected to the bracket with a pin by a detachable device.
At this time, the pilot rope is hung on a guide wheel, and one end is positioned on the ground or on the pile driver body, or wound around a winch provided at the lower part of the leader or on the pile driver body. Then, after the leader is erected by the crane to an angle that can be stably supported by the pile driver body, the lower end of the back stay is connected to the rear part of the pile driver body, and the pin attachment / detachment device is remotely operated to connect the bracket to the bracket. When the connection with the pin is released and the hook of the crane is lowered, the connecting rope side of the leader suspension rope is lowered by the weight of the rope, hook, and leader suspension rope of the crane,
By extending the other end of the pilot rope connected to the leader suspension rope, the connection end of the pilot rope to the leader suspension rope is lowered while rotating the guide wheel. The hook is then removed from the leader suspension rope after the hook has been lowered to the point where it can be released on the ground or on the front bracket.

[0010] When dismounting the pile driver, when the leader is lowered, the leader is lowered to the limit inclination angle at which the leader can be stably supported by the main body of the driver, and the hook of the crane is placed on the front bracket or the like near the ground. Then, the hook is lifted by a crane to pull up the connection fitting together with the pilot rope, and by pulling down the other end of the pilot rope, the connection fitting is fitted to the bracket on the reader. Then, by remotely operating the pin attaching / detaching device, the pins are inserted into the pin holes of both the connection fitting and the bracket, and the connection fitting is connected to the bracket by the pins. After the connection between the lower end of the backstay and the main body of the pile driver is released, the leader is knocked down by a crane.

According to a second aspect of the present invention, the feeding and winding of the pilot rope according to the first aspect is performed by a winch. In the third aspect, since the bracket is provided with a guide portion for guiding the connection fitting when the connection fitting is pulled up, the fitting of the connection fitting to the bracket is performed smoothly.
According to the fourth aspect of the present invention, since the pins are attached and detached in the pin attaching / detaching device by the actuator, the actuator is operated by a switch or the like provided in the driver's cab or the like, and the pins are inserted and removed. In the fifth aspect, the angle (posture) of the connection fitting with respect to the bracket is changed between when the lifting force is applied to the leader suspension rope and when the leader suspension rope is hung, and the connection fitting is in the leader suspension posture. In a certain state, the release of the pin connection between the connection fitting and the bracket is prohibited.

[0012]

FIG. 1 is a rear view of a leader showing a main part of an embodiment of the present invention, and FIG. 2 is a side view of a pile driver having the device of the present invention. As shown in FIG. 2, the pile driver has a lower part of a leader 2 rotatably connected to a front bracket 1A at a front part of a main body 1, and a mounting member 22 at an upper part of the leader 2 and a main body 1 of the main body 1. The reader 2 is mounted upright while supported by a pair of left and right back stays 3 attached to the rear jack 7. The leader 2 is an auger device 5 for rotating a screw auger 6.
And a hammer (not shown) are mounted so as to be movable up and down. 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.

As shown in FIGS. 1 and 2, the back surface of the reader 2 (note that the reader 2 is generally rotated by a rotating device provided at a non-rotating portion at the lower end portion, and the front surface of the reader 2 in accordance with the progress of work. In the case of this rotary type reader, the bracket 12 is fixed to the rear surface when the leader 2 stands up) by welding or the like.
This bracket 12 is for connecting a hook 11a provided on the wire rope 11 of the crane to the leader 2 via a leader hanging rope 10 described later. The leader hanging rope 10 has a hook 11a at one end. It has a ring-shaped connecting portion 10b for connecting (hooking),
The other end has an end fitting 10a. And the end fitting 10
The connection fitting 13 is rotatably connected to a by a pin 14, and the connection fitting 13 is connected to the bracket 12 with a pin to connect the bracket 12 and the wire suspension rope 10.

A connection structure for connecting pins between the bracket 12 and the connection fitting 13 is shown in a longitudinal sectional view of FIG.
3 (B) which is an EE cross-sectional view of (A), a longitudinal cross-sectional view of FIG. 4 (A), and FIG. 4 which is a FF cross-sectional view of FIG. 4 (A).
(B), a longitudinal sectional view of FIG. 5 (A) showing a fitting state between the connection fitting 13 and the bracket 12, and FIG. 5 (B) which is a GG sectional view of FIG. 5 (A).

The connection fitting 13 has a circular fitting portion 1 having a radius r1 (see FIG. 4A) protruding on both sides at the tip thereof.
3a, and the pin hole 13b is provided through the fitting portion 13a. The bracket 12 is composed of two plate members 12a each welded to the leader 2, and the plate member has a radius r1 of the fitting portion 13a for fitting the fitting portion 13a on an opposing surface thereof. It has a semi-circular fitting portion 12b having a slightly larger radius r2,
As shown in FIG. 4B, the width b of the fitting portion 12b is slightly larger than the width a of the fitting portion 13a of the connection fitting 13. A pin hole 1 is provided at the center of the fitting portion 12b of the bracket 12.
2c.

A guide portion 12d consisting of a tapered recess connected to the fitting portion 12b is formed on a surface of the bracket 12 facing the plate member 12a.
2d guides the connection fitting 13 in a direction perpendicular to the side surface of the reader 2. A guide portion 12e having a tapered lower portion is provided at each lower end of the plate member 12a, and the guide portion 12e serves as a guide for correcting a lateral displacement of the connection fitting 13 in the left-right direction. It is.

Reference numeral 15 denotes the connection fitting 13 and the bracket 12
A pin to be inserted and removed from both pin holes 13b and 12c,
16 (see FIG. 1), the pin 15 is inserted into the pin hole 13b, 1
2c is a hydraulic cylinder constituting a remote-operated pin attaching / detaching device which is connected to a bracket 17 welded to the reader 2 at one end by a pin 18, and the other end is connected to the pin 15 by a pin 19. Mounted in conjunction. Reference numeral 21 denotes a hydraulic hose for supplying hydraulic oil to the hydraulic cylinder 16, and the hydraulic cylinder 16 operates pressure oil from a hydraulic pump 30 mounted on the pile driver body 1, as shown in an example in FIG. It is switched by a control valve 31 operated by an operation switch 34 provided in the chamber to expand and contract. Instead of the hydraulic cylinder 16, another actuator composed of a pneumatic cylinder or an electric cylinder may be used.

Reference numeral 23 denotes a pilot rope connected to the connection fitting 13, and reference numeral 24 denotes a guide wheel formed of a sheave (or a roller) attached to an upper portion of the bracket 12 of the reader 2. Attached to the bracket 25 welded to the bracket. The pilot rope 23 is pulled or pulled out by an operator on the ground or the front bracket 1A, so that the connection fitting 13
The pilot rope 23 is attached to the guide wheel 2 from the front bracket 1A in order to make such an operation possible.
It has a length almost twice or more of the height reaching 4.

Although the end of the pilot rope 23 on the opposite side of the connection fitting 13 may be hung on the ground or wrapped around the front bracket 1A, in this embodiment, a hand-operated winch 26 (see FIG. 2) and wound around the winch 26.

FIG. 6 is a diagram showing a work procedure for lifting and lifting the reader 2 using the apparatus of this embodiment.
As shown in (A), generally, the leader 2 of the pile driver is assembled on the ground, the upper end of the back stay 3 is connected to the mounting member 22 of the leader 2, and the pedestal 8 is connected to the front bracket 1A. From the state of being placed horizontally on the auxiliary gantry 9, it is raised to the vertical state shown in FIG. When the leader 2 is short, it is possible to cause the leader 2 by itself by winding up the leader hoisting rope 4 with the winch 20.
If it becomes long, it cannot be caused by itself from the horizontal state. For this reason, the leader 2 is raised using the wire rope 11 by a separate crane (not shown).

When the leader 2 is lifted, the winch 26 side of the leader hanging rope 10 is pulled to fit the connection fitting 13 as shown in FIGS. 6 (A), 3 (A) and 3 (B). The part 13a is fitted to the bracket 12
b, and the operator operates the operation switch 34 or the like in the cab to extend the hydraulic cylinder 16 so that the pin hole 13b of the connection fitting 13 and the bracket 12
Then, the pin 15 is inserted into the pin hole 12c, and the connection fitting 13 is connected to the bracket 12. And the leader hanging rope 10
The hook 11a of the wire rope 11 is hung on the connection portion 10b of
Pull up. In this case, the leader hoisting rope 4 is wound up by the winch 20 from the state shown in FIG.

Then, as shown in FIG. 6 (B), when the leader 2 is raised up to an angle at which the leader 2 can be stably supported by the leader hoisting rope 4, the winding by the crane is stopped, and the operator operates the cab. Switch 3
By operating 4 and the like, the hydraulic cylinder 16 is contracted to pull out the pin 15 from the pin hole 13b of the connection fitting 13.
Then, the wire rope 11 of the crane is lowered, and the leader suspension rope 10 is lowered. Simultaneously with the lowering of the leader suspension rope 10, the pilot rope 23 is also extended. When the leader hanging rope 10 comes down to near the ground, the worker climbs on the front bracket 1A or the hook 1 on the ground.
1a is detached from the connecting portion 10b of the leader hanging rope 10,
As shown in FIG. 6 (C), the front end 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 to make the reader 2 vertical so that the auxiliary stand 9 is mounted. Remove.

When the leader is turned down, as shown in FIG. 6 (C), after the leader 2 reaches the limit angle at which the leader 2 can be supported by the leader hoisting rope 4 on the main body side, the worker can move on the ground or on the front bracket 1A. The hook 11a of the crane 11 is hooked on the connecting portion 10b of the leader hanging rope 10, and the hook 1
While winding 1a, the end of the pilot rope 23 on the winch 26 side is wound. Thereby, FIG. 5 (A),
As shown in (B), the fitting portion 13a of the connection fitting 13 fits into the fitting portion 12b of the bracket 12. In this case, the position and orientation of the fitting part 13a of the connection fitting 13 are adjusted by the guiding action of the guide parts 12e and 12d provided on the bracket 12, and the fitting of the fitting parts 13a and 12b is performed smoothly. .

In this embodiment, the connection fitting 13
Is the end fitting 1 of the leader hanging rope 10 via the pin 14
0a, the connection fitting 13 is connected to the pilot rope 23 constrained by the guide wheel 24 before the connection fitting 13 is connected to the bracket 12.
3 is connected, the leader suspension rope 10 is lifted by a crane, and the pin hole 13b and the pin 14 have the same orientation. Therefore, the pin hole 13b can be automatically adjusted to the pin hole 12c of the bracket 12. In addition, the direction of the connection fitting 13 can be arbitrarily changed with respect to the leader hanging rope 10, and the direction of the connection fitting 13 can be easily adjusted to the directions of the guide portions 12 e and 12 d of the bracket 12. The fitting of the bracket 13 to the bracket 12 is facilitated.

When the connection fitting 13 is fitted to the bracket 12, the pin hole 12c of the bracket 12 and the pin hole 13b of the connection fitting 13 automatically match. In a state where the pin holes 12c and 13b are aligned with each other, the operator operates the operation switch 34 or the like to extend the hydraulic cylinder 16 in the operator's cab, thereby inserting the pin 15 into the pin hole 12c.
c, 13b to connect the connection fitting 13 to the bracket 12 with the pin 15. Then, as shown in FIG. 6 (B), the lower end of the back stay 3 is detached from the connection portion of the jack 7, and the leader hoisting rope 4 and the crane wire rope 11 are removed.
The leader 2 is lowered to the state shown in FIG.

As described above, by using the apparatus of this embodiment,
The worker can attach and detach the connection fitting 13 to and from the bracket 12 without climbing the leader. Further, the leader hanging rope 10 may be long enough to realize a curved state capable of connecting between the hook 11a of the wire rope 11 of the crane and the bracket 12, so that the leader hanging rope 10 is shortened. (By providing the connection fitting 13 as a link connected by the pin 14, the connection fitting 13 becomes a bent portion. By rotatably pinning the connection fitting 13, the leader hanging rope can be used. 10 can be shortened), the pilot rope 23
For example, a thin wire rope of, for example, about 4 mm or 6 mm that only gives a tension enough to fit the connection fitting 13 into the bracket 12 may be used, the guide wheel 24 may have a small diameter, and a lightweight lifting and suspending device may be used. Can be provided.

Further, in the present invention, as a device for remotely controlling the mounting and dismounting of pins, a pin having a spring and an operation arm is attached to the bracket 12 or the reader 2 and a string is connected to the operation arm to connect the ground or front bracket 1A.
It is possible to construct a human-powered device having a configuration in which the pin is pulled out against the spring by pulling the cord from the cable. However, by using an actuator such as a hydraulic cylinder, labor is not required, and Can be easily attached and detached.

FIG. 7 shows another embodiment of the present invention.
FIG. 7A is a rear view showing a main part, and FIG.
7C is a sectional view taken along line II of FIG. 7B, and FIG.
(D) is JJ sectional drawing of (B). In this embodiment, the left and right plate members 1 are provided on the upper part of a bracket 12 to be welded to the leader 2.
A top plate 12f is provided to close the gap between the top plates 2a.
A guide hole 12g for passing the pilot rope 23 is provided in 2f. According to the present embodiment, an effect is obtained that the connection fitting 13 can be easily fitted into the bracket 12 without strictly adjusting the position of the leader hanging rope 10. Note that the guide portion provided on the upper portion of the bracket 12 may be a pilot rope passage or tube formed by a lattice, instead of the guide hole.

FIG. 8A is a sectional view showing another embodiment of the present invention, and FIG. 8B is a sectional view taken along the line KK of FIG. Direct connection fitting 1
3 is attached, and according to the present embodiment, the structure is simplified.

FIG. 9A is a rear view showing another embodiment of the present invention, and FIG. 9B is a sectional view taken along line LL of FIG. 9A. A winch 29 with a motor 28 for winding the pilot rope 23 is mounted on the upper part of the bracket 12 by a bracket 27 welded to the reader 2, and the winch 29 is remotely operated, so that the pilot rope 23 can be fed and wound. According to the present embodiment, the pilot rope 23
The effect of reducing the labor required for winding and feeding of the paper is obtained. The winch 29 may be attached to the lower part of the pile driver body 1 or the leader 2 such as the front bracket 1A instead of the manually wound winch 26 as shown in FIG.

The above-described hydraulic electric circuit shown in FIG. 10 enhances safety by prohibiting detachment of the pin 15 from the pin holes 13b and 12c due to an erroneous operation during lifting or suspending the reader 2 by a crane. Circuit for That is, a limit switch is inserted into an operation circuit between the contraction side solenoid 31a of the cylinder 16 of the control valve 31 and the switch 34, and the limit switch 33 is connected when the connection fitting 13 is not lifted by a crane. When the leader hanging rope 10 is pulled up by being pushed and closed by the metal fitting 13, the connecting metal 13 is
5, the contact point of the limit switch 33 is released from the connection fitting 13, and the contact point of the limit switch 33 is released by the spring added to the limit switch.
The contact of the limit switch 33 is opened, so that even if the operation switch 34 is operated to the solenoid 31a side, the circuit from the battery 35 to the solenoid 31a is cut off. Thus, even if the operation switch 34 is operated in a direction in which the pin 15 is pulled out for some reason during lifting or hanging by the crane, the pin 15 does not come off.

[0032]

According to the first aspect, by pulling the pilot rope on the ground or the like, it is possible to fit the bracket of the leader and the connection fitting of the leader hanging rope, and
Since the connection fitting and the bracket can be attached and detached by a pin by remote operation, the connection fitting can be attached to and detached from the bracket without an operator climbing the leader, and the attachment and detachment of the reader hanging rope can be efficiently performed. Further, the leader hanging rope may be long enough to realize a curved state capable of connecting the hook of the wire rope of the crane and the bracket provided on the leader, and thus the leader hanging rope is shortened. The pilot rope can be a thin wire rope that only gives a tension enough to fit the connection fitting into the bracket, the guide wheel can be of a small diameter, and a lightweight lifting and hanging device can be provided.

According to the second aspect of the present invention, since the winch is provided as a means for winding and feeding out the pilot rope, the operation of the pilot rope does not require labor and the operation becomes easy.

According to the third aspect of the present invention, a guide portion is provided at a lower portion of the bracket so as to guide the connection fitting when fitting the fitting to the bracket. Is smoothly fitted to the bracket.

According to the fourth aspect, since the remote-operated pin attaching / detaching device is provided with the hydraulic cylinder or the electric cylinder as an actuator, no labor is required for attaching / detaching the pin, and the operation becomes easy.

According to the fifth aspect, the lock circuit is provided to prohibit the release of the pin connection between the connection fitting and the bracket in a state where the connection fitting is in the leader lifting posture.
Safety is improved.

[Brief description of the drawings]

FIG. 1 is a rear view of a reader according to an embodiment of the present invention.

FIG. 2 is a side view of a pile driver having the device according to the embodiment of the present invention.

FIG. 3A is a longitudinal sectional view showing a state in which the reader is horizontal in this embodiment, and FIG. 3B is a sectional view taken along line EE of FIG.

FIG. 4A is a longitudinal sectional view showing a state in which a connection fitting and a bracket are detached in a state where a reader is inclined in the present embodiment, and FIG. 4B is a sectional view taken along line FF of FIG. .

FIG. 5A is a longitudinal sectional view showing a state in which a connection fitting and a bracket are fitted in the present embodiment, and FIG.
GG sectional view of FIG.

FIGS. 6A to 6C are diagrams showing a procedure for assembling the reader according to the embodiment.

7A is a rear view of a reader showing another embodiment of the present invention, FIG. 7B is a cross-sectional view taken along line HH of FIG. 7A, and FIG.
(D) is a JJ cross-sectional view of (B).

FIG. 8A is a longitudinal sectional view showing another embodiment of the present invention,
(B) is KK sectional drawing of (A).

FIG. 9A is a rear view of a reader showing another embodiment of the present invention, and FIG. 9B is a sectional view taken along line LL of FIG. 9A.

FIG. 10 is a hydraulic electric circuit diagram of a pin mounting / dismounting hydraulic cylinder according to the present invention.

[Explanation of symbols]

1: Pile driver body, 1A: Front bracket, 2: Leader, 3: Back stay, 4: Leader hoisting rope, 5: Auger device, 6 screw auger, 7: Jack, 10:
Leader hanging rope, 11: wire rope, 11a: hook, 12: bracket, 12b: fitting portion, 12c: pin hole, 12d, 12e: guide portion, 12g: guide hole, 1
3: Connection fitting, 13a: Fitting portion, 13b: Pin hole, 1
4, 15: pin, 16: hydraulic cylinder, 23: pilot rope, 24: guide wheel, 26, 29: winch, 2
8: motor, 30: hydraulic pump, 31: control valve, 33: limit switch, 34: operation switch

Claims (5)

(57) [Claims] An apparatus for raising or lowering a leader by a separate crane with a lower end of the leader pivotally attached to a front bracket of a pile driver, thereby raising or lowering the leader. Attachment, a connection fitting having a pin hole is provided at the end of the leader hanging rope connected to the wire rope of the crane, and the connection fitting has a structure detachably fitted to the bracket. A bracket is provided with a remote-operated pin attaching / detaching device that pulls pins in and out of both pin holes with the connection fitting fitted to the bracket, and a pilot rope connected to the connection fitting of the leader suspension rope, A guide wheel for hanging the pilot rope is rotatably mounted near the upper portion of the bracket of the reader. The pilot rope has a length substantially equal to or more than twice the height from the front bracket to the guide wheel, hangs the pilot rope on the guide wheel, and connects one end of the pilot rope to the connection fitting. The other end of the pilot rope is pulled down, whereby the connection fitting is pulled up and the connection fitting is fitted to the bracket. 2. An apparatus for erecting or falling down a leader by lifting and suspending the leader by a separate crane with a lower end of the leader pivotally attached to a front bracket of a pile driver. Attachment, a connection fitting having a pin hole is provided at the end of the leader hanging rope connected to the wire rope of the crane, and the connection fitting has a structure detachably fitted to the bracket. A remote control type pin detaching device for attaching and detaching a pin to and from both pin holes with the connection fitting fitted to the bracket is attached to the bracket, and a pilot rope connected to the connection fitting of the leader suspension rope is provided. A winch for pulling up a pilot rope is installed on the leader or the pile driver body, and one end of the pilot rope is The other end of the pilot rope is connected to the connection fitting and wound by the winch, whereby the connection fitting is pulled up and the connection fitting is fitted to the bracket. Lowering device. 3. The pile lifting machine according to claim 1, further comprising a guide portion provided at a lower portion of the bracket for guiding the connection fitting when the fitting is fitted to the bracket. apparatus. 4. The leader of a pile driver according to claim 1, wherein the remote-operated pin attaching / detaching device includes a hydraulic cylinder or an electric cylinder as an actuator. Lifting suspension equipment. 5. A lock circuit according to claim 1, further comprising a lock circuit for prohibiting release of a pin connection between the connection fitting and the bracket when the connection fitting is in a leader lifting posture. Leader lifting device for pile driver.