JPH0640664Y2 - Pile driver - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a driving tool for foundation piles such as ready-made piles.

(Prior Art) Conventionally, as this type of pile driving machine, a driving type pile driving machine that drives a pile into the ground with a drop hammer and a press-fitting method that presses the pile into the ground by using a driving device such as a hydraulic cylinder and a drive motor. Known as a pile driver.

(Problems to be Solved by the Invention) In the above-mentioned conventional driving type pile driving machine, although the pile can be driven into the hard ground, there is a drawback that noise pollution occurs. On the other hand, in the press-fitting type pile driver, the pile can be press-fitted without noise, but on the other hand, there is a drawback that the pile cannot be press-fitted into the hard ground.

Therefore, as a solution to the above drawbacks and to have only an advantage, a pile driver having both a drop hammer and a pile press-fitting device can be considered.However, when the pile is driven by the drop hammer, the impact is transmitted to the pile press-fitting device. Then, there is a possibility that the pile press-fitting device is repeatedly subjected to an impact to be fatigue-damaged or to break down.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a pile driving machine in which an impact at the time of driving a pile does not act on a device such as a pile press-fitting device.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention is configured such that a long sub-leader 4 is attached to a long main leader 2 in a vertically movable manner, and
A pile support cap 8 that supports the heads of the piles 7 is mounted on the sub-leader 4 so as to be able to move up and down for a certain distance, and the pile press-fitting devices 13 and 29 that push down the piles 7 via the caps 8 are provided on the sub-leader 4. A drop hammer 19 for hitting the cap 8 is attached to the main leader 2 so as to be vertically movable.

(Embodiment) FIG. 1 is a side view of a pile driver as an embodiment of the present invention, in which a guide rod 3 of a long main leader 2 supported by a crane body 1 in an upright state has a short sub leader. 4 is the engaging arm 5
A pile support cap 8 for fitting and supporting the head of the pile 7 is mounted on the guide rod 6 of the sub-leader 4 via the engaging arm 9 so as to be able to move up and down. Stoppers 10 and 11 for restricting the movement stroke of the cap are fixed to the upper and lower ends of the sub-leader 4.
Therefore, the cap 8 is mounted on the sub-leader 4 in a state of being free to move up and down within a certain range, and is further mounted on the main leader 2 via the sub-leader 4 so as to be vertically movable over its entire length.

The main leader 2 is provided with a pile press-fitting device 13. This device 13 is wound between a pair of sprocket wheels 14 and 15 arranged at the upper and lower ends of the main leader 2 and the sprocket wheels 14 and 15 and has a predetermined chain link 16a.
Is composed of an endless chain 16 connected to the sub-leader 4 and a drive device 17 for reciprocating the chain 16 via a lower sprocket wheel 15. The pile press-fitting device 13 is operated in one direction to operate the sub-leader. When the cap 4 is lowered, the cap 8 regulates the upper stopper 10 and presses the pile 7 fitted and supported by the cap 8 into the ground, and operates the pile press-fitting device 13 in the other direction. By pulling up the sub leader 4, the cap 8 can be raised by being restricted by the lower stopper 11.

On the guide rod 3 of the main leader 2, a drop hammer 19 for hitting the cap 8 is supported by an engaging arm 18 so as to be lifted and lowered, and a locking tool 20 projecting from the side surface thereof is provided with a crane. The tip of the lifting rope 22 pulled out from the driving winch 21 of the main body 1 has sheaves 23, 23 on the main leader 2.
And via the sheaves 24, 24 on the drop hammer 19 detachably locked. Therefore, the operation of the winch 21 causes the drop hammer 19 to rise and fall to strike the cap 8, and the pile 7 supported by the cap 8 is driven into the ground.

In this case, since the cap 8 is mounted on the sub-leader 4 in a vertically movable state within a certain range, the pile press-fitting device 13 directly connected to the main leader 2 and the crane main body 1 supporting the main leader 2, especially the sub-leader 4. Do not give an impact force to the equipment, which may cause equipment damage.

In FIG. 2, 26 is a through hole 27 in the cap 8, a through hole (not shown) provided in the head of the pile, and a through hole 28 provided in the sub-leader 4.
When only the pile press-fitting device 13 is driven by the pile fixing pin that is fitted over and, the pile press-fitting work is performed in a state where these three members are integrally fixed.

When performing a pile driving operation, as shown in the phantom line in FIG. 1, the lifting rope 22 is removed from the locking tool 20 of the drop hammer 19 and fed out. At this time, the drop hammer 19 is placed on the upper surface of the cap 8 supported by the sub leader 4, and does not drop even if the lifting rope 22 is removed. This point is one of the features of the present invention. The tip of the lifting rope 22 is engaged with the pile 7 on the ground, and then the lifting rope 22
The pile 7 is caused by winding up. Next, the heads of the piles 7 that have been raised are fitted into the caps 8 and the piles 7
And the pile 7 as shown in the solid line in FIG.
Then, the lifting rope 22 is detached from the pile 7 at the tip end thereof, and then the lifting rope 22 is locked to the locking tool 20.

Next, in the case of soft ground, only the press-fitting device 13 is operated to push down the sub-leader 4 and press the pile 7 into the ground via the cap 8.

In the case of hard ground, the winch 21 is actuated to repeatedly drop the drop hammer 19 onto the cap 8, and in parallel with this, the press-fitting device 13 is actuated to lower the sub-leader 4 to thereby drop the press-fitting device. Drop hammer on 13 19
It is possible to efficiently perform the driving action while preventing the impact due to the action as much as possible.

Another embodiment of the present invention will be described with reference to FIGS. 3 and 4. The same components as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted. Pile press-fitting device of this embodiment
29 has a press-fitting winch 30 arranged in the crane body 1, and the tip of the press-fitting rope 31 fed from the winch 30 has sheaves 32 to 34 on one side of the main leader 2 and the sub-leader 4. After being wound around, the sheave 35 under the sub-leader 4
It is wound around each of the sheaves 36, 37 on the other side surface of the main leader 2 and the sub leader 4 via the, and finally locked to the lower end portion of the main leader 2. Therefore, the winch for press-fitting from the state shown in FIG.
When 30 is operated and the press-fitting rope 31 is wound up, the sub leader 4
Is pushed down, and the pile 7 is pressed into the ground via the cap 8.

Reference numeral 39 in FIG. 3 denotes a cap suspension device, which is a winch 40 for suspension mounted on the crane main body 1, and a sub-leader 4 which is fed from the winch 40 and is extended from the sheaves 41, 41 of the main leader 2. It is possible to pull up the cap 8 having the suspension rope 42 connected to the above and pushed down by the pile press-fitting device 29 by winding the suspension rope 42.

The stakeout procedure of this embodiment is almost the same as that of the above-mentioned embodiment, and the description thereof will be omitted.

(Effects of the Invention) According to the present invention, a pile press-fitting device alone can be used according to soft or hard ground, or a hammering device with a drop hammer can be used together with the pile press-fitting device, which can be quickly adjusted according to the working conditions of the pile driving site. There is an advantage that can correspond to.

In addition, it is possible to prevent the impact force of the drop hammer from affecting the pile press-fitting device as much as possible when using the drop hammer impactor alone or in combination with the pile press-fitting device, which prevents equipment damage. The driving operation can be performed smoothly.

Particularly, according to the present invention, when the hoisting rope for hanging the drop hammer is removed and the rope is used for hoisting the pile, the drop hammer is mounted and supported on the pile supporting cap supported by the sub leader. Since it does not fall, it can be used both as a drop hammer hoisting / falling rope and a pile hoisting rope, and since only one winch is required to operate the rope, the structure is simple and easy to operate. Is.

[Brief description of drawings]

FIG. 1 is a side view of a pile driver which is an embodiment of the present invention, FIG. 2 is an exploded perspective view of the main portion thereof, and FIG. 3 is a side view of a pile driver which is another embodiment of the present invention. FIG. 4 is an exploded perspective view of the main part. 2 ... Main leader, 4 ... Sub leader, 7 ... Pile, 8 ... Cap,
13, 29… Pile press-fitting device, 19… Drop hammer.

Claims (1)

[Scope of utility model registration request] 1. A long sub-leader is attached to a long main leader so that the sub-leader can be moved up and down, and a pile support cap that supports a head of a pile is attached to the sub-leader so that it can be moved up and down for a certain distance.
A pile driving machine in which a pile press-fitting device that pushes down a pile via the cap is connected to the sub-leader, and a drop hammer that strikes the cap is vertically mounted to the main leader.