JPH0742152A - Pile hammer - Google Patents

Abstract

(57) [Summary] [Purpose] The work of attaching and detaching the pile hammer to and from the work machine body by suspending it with a wire rope and raising and lowering it.
(EN) Provided is a pile hammer having a structure that is easier and safer than ever before. [Structure] When a pile hammer 10 is erected from a state lying on the ground and is attached to a working machine main body or is laid down from a standing state, a plurality of leg wheels 7 and 8 which are grounded at least during the work are provided in a frame 6. It was attached to the lower end of the.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile hammer such as a drop hammer, a diesel hammer, and a hydraulic hammer which are attached to a pile driving machine or a hydraulic excavator and used for pile driving work, and more particularly, to a pile excavator body. , Removable structure.

[0002]

2. Description of the Related Art FIG. 7 is a side view showing a state in which a conventional pile hammer is attached to a pile driver body. As shown in FIG. 7, the pile hammer 1 is slidable on the rails 31 provided along the front surface of the leader 30 of the pile driving machine 2 with the guides 3 arranged in a line on the rear side of the frame 6. Assembled to. The pile hammer 1 is housed in a cylindrical frame 6 so as to be vertically movable so that the ram 20 can be lifted by a pulling device such as a hydraulic cylinder 21. The hydraulic cylinder 21 lifts the ram 20 to increase hydraulic pressure. The ram 2 is allowed to fall freely by urging the
The pile is driven by hitting the pile with the cushion material 22 at 0.

As shown in the side view of FIG. 8 and the view of arrow E in FIG. 9, the guide 3 has a pair of guide arms 3a attached to the side surfaces of a frame 6 with bolts 50. is there. The pile hammer 1 is attached to the leader 30 as shown in FIG.
As shown in FIG. 10 to FIG. 12, the crane rope 5 is hung on the bracket 4 at the upper end of the rack, and the rope 5 is rolled up in the direction of the arrow Z while the crane is running and turning, as shown in FIGS. -Raise the pile hammer 1 and raise it upright with the loupe 5 still vertical. Next, as shown in FIG. 7, the pile hammer 1 is positioned along the rail 31 of the leader 30 of the pile driving machine 2, and one or both guide arms 3a of the guide 3 are positioned. After detaching, the guide 3 is attached to the rail 31, and the pile hammer 1 is attached to the leader 30. After the pile driving work is completed, the pile hammer 1 is removed from the leader 30 in the reverse order of the above.

[0004]

When the pile hammer 1 is attached, as shown in FIG. 10, the pile hammer 1 starts to rise with the corner A of the guide arm 3a below the frame 6 as a grounding point, and rises to some extent. , Fig. 11
As shown in FIG. 5, the ground contact point is changed to the outer peripheral point B at the lowermost end of the frame 6 to get up. During this time, the bracket 4
The position of (suspension point) moves on the arc locus with winding of the rope 5 around the corner A or the point B as a center. Therefore, the operator of the crane operates the winding operation of the rope 5 and, at the same time, performs the operation such as turning and traveling of the crane in response to the movement of the bracket 4 to adjust the position of the crane. It had to be changed, requiring complex crane operations.
In addition, the pile hammer 1 is a heavy load of about 5 to 20 tons, and careful operation is required. Further, in the state of FIG. 11, since the frame 6 has a cylindrical shape, the lowermost end portion of the pile hammer 1 has one ground point (point) as shown in FIG. 13 which is a P arrow view of FIG. Since the pile hammer 1 becomes B), the pile hammer 1 becomes unstable, and there is a risk that the pile hammer 1 may roll if the work place is inclined, which is dangerous.

After the pile driving work, the pile hammer 1
When the pile hammer 1 is removed from the leader 30 and the pile hammer 1 is laid down from the standing state, as shown in the side view of FIG. 14, the crane is operated to hang it on the bracket 4.
The pile hammer 1 must be tilted by pulling the pile 5 in the direction of the arrow W, and the pile hammer 1
After the center of gravity of the pile hammer moves to the crane side from the fulcrum B, tilting momentum is exerted by the weight of the pile hammer 1 and the weight of the pile hammer 1 is shocked to the rope 5, which makes it difficult to operate the crane. There was a problem. Further, in the middle of putting the pile hammer 1 in a lying state, there is an unstable state in which the grounding point becomes 1 point (point B) as in the case of the raising work, which is dangerous.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a pile hammer having a structure that allows the pile hammer to be attached to and removed from the excavator main body more easily and safely than before.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a cylindrical frame in which a ram is vertically movably housed, and the ram is lifted and dropped to perform pile driving.
Attach a wire rope to the hanging part at the top of the frame and lay it up and down to attach it to the excavator body. A plurality of wheels
It is characterized in that it is attached to the lower end of the frame.

Further, in the present invention, the leg wheel is composed of a pair of rear wheels on the excavator body side and a pair of front wheels on the opposite side of the excavator body, and the rear wheel and the front wheel are both landed. In the above, it is preferable that the frame is inclined, and a perpendicular line passing through the center of gravity in the inclined posture is behind the rear wheel or in front of the front wheel.

[0009]

Since the present invention has the above-mentioned structure, when a wire rope such as a crane is hung on the suspension portion at the upper end of the frame of the pile hammer laid on the ground to stand up (fall down),
A plurality of wheels attached to the lower end of the frame contact the ground and the wheels roll, and the lower end of the frame is pulled toward the crane side (away from the frame). You don't have to let me. Further, since the frame is grounded by a plurality of leg wheels, the pile hammer during erection work is stable.

Further, in a state in which the wire hammer is hung on the hanging portion and the pile hammer is hung by using a crane or the like and both the rear wheels and the front wheels are landed, the pile hammer is inclined and a perpendicular line passing through the center of gravity is Since it is located behind the rear wheel or ahead of the front wheel, when the rope is rolled out, the pile hammer falls forward or backward due to its own weight.

[0011]

1 is a side view showing an embodiment of a pile hammer according to the present invention when it is placed on the ground, and FIG. 2 is a view taken in the direction of arrow F in FIG. As shown in FIGS. 1 and 2, the pile hammer 10 of this example is different from the conventional pile hammer 1 in the frame.
At the lower end of the guide 6 on the side where the guide 3 is mounted, a rear wheel 7 (a pile wheel on the body side of the pile driver) and a front wheel 8 (a gear ring on the side opposite to the body of the pile driver), which are the gear wheels for mounting and removing the pile hammer. Is provided. The rear wheel 7 and the front wheel 8 have a structure in which they are attached to both ends of axles 7a, 8a provided tangentially to the frame 6, respectively.

When the pile hammer 10 is laid on the ground with the guide 3 grounded, the rear wheel 7 is mounted so as to be slightly grounded or slightly floated and slightly projected from the bottom of the frame 6. Has been. Also, FIG.
As shown in the side view of FIG. 1, when the pile hammer 10 is erected and both the rear wheels 7 and the front wheels 8 are in contact with the ground, the perpendicular line H passing through the center of gravity G of the pile hammer 10 passes rearward with respect to the axle 7a. The front wheel 8 has a diameter larger than that of the rear wheel 7, or the axle 8a is more flexible than the axle 7a.
It is located below the bottom of the frame 6.

The pile hammer 10 is attached to the leader of the pile driver, as in the conventional case, by the bracket 4 on the upper portion of the frame 6.
1 and the rope 5 is wound up by a crane or the like in the direction of arrow Z in FIG. 1 to cause the pile hammer 10 to slide the guide 3 on the rail 31 in the same manner as described above. It is done by assembling. FIG. 3 is a side view showing a state in which the pile hammer 10 is in the process of being raised. The pile hammer 10 supports the ground point C of the rear wheel 7 at the lower end of the frame 6 as a fulcrum with the winding of the rope 5. Then, the rear wheels 7 roll at the same time, and the lower end of the frame 6 moves up while moving in the direction (arrow S direction) where the lower end of the frame 6 is attracted to the crane.

In this way, the pile hammer 10 rises while the ground contact point C moves, and the bracket 4 on the upper portion of the frame 6 is pulled up as shown by the chain double-dashed line. Only the operation of winding the rope 5 is required. Therefore, the turning operation and the traveling operation for changing the position of the crane are not necessary, and the raising operation of the pile hammer 10 can be easily performed. In addition, while the pile hammer 10 is being raised, the pair of rear wheels 7 is always
Since the pile hammer 10 is grounded, even if the ground is slightly inclined, the pile hammer 10 does not roll, the pile hammer 10 is stable, and the work can be performed safely.

After the completion of the pile driving work, the pile driving machine is re-installed.
The pile hammer 10 removed from the da 30 is suspended by cranes and lowered as shown in the side view of FIG. At this time, since the front wheel 8 projects from the bottom surface of the frame 6 from the rear wheel 7, when the front wheel 8 first comes into contact with the ground and the rope 5 is fed out, the pile hammer 10 tilts as shown in FIG. The rear wheel 7 contacts the ground. When the rope 5 is further extended from this state, the perpendicular line H passing through the center of gravity G of the pile hammer 10 passes behind the axle 7a of the rear wheel 7 as described above, so that the pile hammer 10 touches the grounding point of the rear wheel 7. At the same time that the rear wheel 7 starts to fall under its own weight with C as a fulcrum, the rear wheel 7 moves in a direction away from the crane (direction of arrow T).

In this way, the pile hammer 10 begins to fall under its own weight while the ground contact point C moves, and the bracket 4 above the frame 6 descends right below as shown by the chain double-dashed line. , The operation of the crane can be done only by the operation of feeding the rope 5. Therefore, the turning operation and the traveling operation for changing the position of the crane are not necessary, and the rolling operation is unnecessary.
The pile hammer 1 is not impacted by the weight of the pile hammer 1 and the pile hammer 10 can be easily tilted. Further, since the pair of rear wheels 7 are always in contact with the ground while the pile hammer 10 is being tilted, the pile hammer 10 is stable and the work can be performed safely.

In the above embodiment, the front wheel 8 is protruded from the rear wheel 7 from the bottom surface of the frame 6, but the rear wheel 7 is protruded from the front wheel 8 so that the rear wheel 7 and the front wheel 8 are formed. When both are grounded, the pile hammer 10
A vertical line H passing through the center of gravity G of the pile hammer 10 may pass forward with respect to the axle 8a, and in this case, the pile hammer 10 starts to fall toward the side opposite to the pile driver body due to its own weight.

FIG. 6 is a side view showing another embodiment of the pile hammer according to the present invention in a state of being suspended by a crane.
This example is an example in which legs 11 are attached instead of the pair of front wheels 8 with respect to the above-described embodiment, and when the rear wheels 7 and the legs 11 are both in contact with the ground, the perpendicular line H passing through the center of gravity G of the pile hammer 10 is the axle. By setting the position and height of the leg 11 so as to pass through the pile driver main body side with respect to 7a, the same effect as in the above-described embodiment can be obtained in this example as well.

In this embodiment, the leg wheels 7, 8 or the leg 11 is fixed to the frame 6 of the pile hammer 10. However, the leg wheels 7, 8 or the leg wheels 7 or 8 only when the pile hammer 10 is mounted or removed. The leg 11 may be assembled to the frame 6. Further, the present invention can be applied to a structure in which a hydraulic excavator is used for a main body of an excavator and a pile hammer is hung from the arm.

[0020]

According to the first aspect of the present invention, since the pile hammer is attached to the main body of the pile driver and a plurality of leg wheels are provided at the lower end of the frame of the pile hammer for grounding when the pile hammer is removed, Hang the pile hammer by hanging a wire rope such as a crane on the hanging part at the top of the frame,
Since the leg wheels are in contact with the ground and the leg wheels are rolling, and the hanging portion at the upper end of the frame moves right above or right below, only the rope winding operation is required for the operation of the crane. The turning operation and traveling operation for changing the position are unnecessary.
As a result, the pile hammer can be attached and detached more easily than before. Also, during the undulating work, the frame
Since the mums are grounded by a plurality of leg wheels, there is no fear of the pile hammer rolling sideways, and the above work can be performed safely.

According to the second aspect of the present invention, when the rear wheels and the front wheels are both landed, the perpendicular line passing through the center of gravity of the pile hammer is behind the rear wheels or ahead of the front wheels.
When the pile hammer is hung by applying a wire rope such as a crane to the suspension part, and the rope is fed out from a state where the rear wheel and the front wheel are both landed, the pile hammer is its own weight and the rear wheel or the front wheel is a fulcrum. As soon as it starts to fall backward or forward, the rear wheels or front wheels roll and the pile hammer falls. Therefore, the roll for defeating the pile hammer is
Since the crane operation to pull the sideways is unnecessary, the work to lay down the pile hammer can be performed easily and efficiently.
Further, the weight of the pile hammer is not shocked on the rope.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a pile hammer according to the present invention in a state of being laid on the ground.

FIG. 2 is a view on arrow F of FIG.

FIG. 3 is a side view showing a state in the middle of work for causing a pile hammer of the embodiment.

FIG. 4 is a side view showing the pile hammer of the embodiment in a suspended state.

FIG. 5 is a side view showing a state in which the pile hammer of the embodiment is being laid down.

FIG. 6 is a side view showing another embodiment of the pile hammer according to the present invention in a suspended state.

FIG. 7 is a side view showing a state in which a conventional pile hammer is attached to a pile driver.

FIG. 8 is a side view showing a conventional pile hammer laid on the ground.

9 is a view taken in the direction of arrow E in FIG.

FIG. 10 is a side view showing a state in the middle of work for causing a conventional pile hammer.

FIG. 11 is a side view showing a state in the middle of a work for causing a conventional pile hammer.

FIG. 12 is a side view showing an upright state of a conventional pile hammer.

13 is a P arrow view of FIG. 11 showing the lowermost end of the pile hammer.

FIG. 14 is a side view showing an upright state of a conventional pile hammer.

[Explanation of symbols]

 1, 10 Pile hammer 2 Pile driver 3 Guide 3a Guide arm 4 Bracket 5 Rope 6 Frame 7 Rear wheel 7a, 8a Axle 8 Front wheel 11 Leg

Claims (2)

[Claims] 1. A ram is housed in a cylindrical frame so that it can move up and down, and the ram is lifted and dropped to perform pile driving,
A pile hammer that is attached to and removed from the excavator main body by applying a wire rope to the hanging part at the top of the frame and undulating it against the ground. A plurality of pile hammers that are grounded when the pile hammer is attached to and removed from the excavator main body. A pile hammer having a leg wheel attached to the lower end of the frame. 2. The state according to claim 1, wherein the leg wheels are composed of a pair of rear wheels on the excavator body side and a pair of front wheels on the opposite side of the excavator body, and both the rear wheels and the front wheels are landed. In the pile hammer, the frame is inclined, and a perpendicular line passing through the center of gravity of the pile hammer in the inclined posture is behind the rear wheel or in front of the front wheel.