JPS6139446B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a leader hoisting lever and a hoisting lever for a pile driver.
It relates to a recombination mechanism with a lowering lever.

Figure 1 shows a three-point pile driver as an example of a pile driver, Figure 2 shows the arrangement of the operating levers of the pile driver, and Figure 3 shows the crane operation when the pile driver is converted into a crane. This shows the ideal control lever arrangement. The arrows attached to the levers in FIGS. 2 and 3 each indicate the operating direction.

In general, in a three-point pile driver, after the leader 4 is assembled into the ground, a leader undulating drum for raising the leader 4, working tools such as a diesel hammer 5 or an earth auger 6, and a plurality of hoisting and hoisting machines for suspending the pile are installed. It is equipped with a lower hoisting drum, and the driver's cab is equipped with multiple operating levers corresponding to these drums, as well as operating levers for hydraulic cylinders such as the backstay and outrigger jack. .

Among these plurality of operating levers, the leader hoisting lever 10 is necessary for operation when mounting the assembled leader 4 on the pile driving machine main body 1 and raising it from a horizontal state to an angle close to vertical. After this, the two backstays 3 are attached, and after the leader 4 is supported by the backstays 3, there is no need to operate the leader undulating lever 10. That is, it is not necessary to operate the leader hoisting lever 10 during pile driving work.

Therefore, with the backstay 3 installed,
If the leader undulation lever 10 is operated incorrectly, there is a risk of damage to the machine or an accident.

On the other hand, hoisting/lowering levers 11 and 12 and a clutch lever 1 that operate a plurality of hoisting/lowering drums
Types 3, 14, 15, etc. are operated frequently during pile driving work, and require detailed operations such as inching.

Considering these points, when placing the control levers in a limited space in the operator's cabin, it is considered ideal to place the control levers as shown in Figure 2 in terms of frequency of use and ease of use during pile driving work. .

Incidentally, in order to make effective use of the machine, pile drivers are sometimes used not only for original pile driving work, but also for crane work by being equipped with a crane front attachment.

Such crane work mainly involves lifting and moving loads, and therefore hoisting/lowering levers 11, 12 and clutch levers 13, 14, 15 are used to hoist and hoist/lower loads. The boom hoisting lever 10' and the swing lever 9, which change the boom angle for moving the load in the horizontal direction, are frequently operated. However, since two or more loads are not hung from separate hooks at the same time, the hoisting and hoisting levers that are mainly operated are limited.
It is less compared to piling work.

Due to the above-mentioned circumstances, the operation lever arrangement when performing crane work by attaching the crane front attachment to the pile driver body is as shown in Figure 3.
A swing lever 9 and a boom hoisting lever 10' are arranged on both sides in front of the driver's seat 7 with a necessary and sufficient interval for the driver to perform a combined operation including a swing operation and a boom hoisting operation. considered ideal.

In FIG. 1, 2 is a front bracket, in FIGS. 2 and 3, 7 is a driver's seat, 8 is a lever stand, and 16 is a row of operating levers for cylinders such as backstays.

Although the leader hoisting lever 10 used for pile driving work and the boom hoisting lever 10' used for crane work have different names, their functions are substantially the same.

As described above, when a pile driver is used for both pile driving work and crane work, there is a difference in the ideal arrangement of the operating lever. Therefore, it is desirable from the viewpoint of work efficiency and operability to change the arrangement of the operating levers according to the content of the work.

However, conventional pile drivers do not have a structure that allows for easy rearrangement of the operating levers, and when converting a pile driver from its original use for pile driving to crane work, or from crane work to pile driving. When returning to work, it is extremely difficult to rearrange the leader hoisting lever 10 and the hoisting/lowering lever 11 or 12. For this reason, in general, reassembly is not performed, and the operator is forced to operate the crane in an awkward position, resulting in lower work efficiency, poor operability, causing erroneous operations, and fatigue of the operator. The disadvantage was that the increase in

An object of the present invention is to provide a leader undulation lever for a pile driver in which the leader undulation lever and the hoisting/lowering lever can be easily rearranged between when the pile driver is used for pile driving work and when the pile driver is used for crane work. To provide a mechanism for recombining a lever and a hoisting/lowering lever.

In order to achieve this object, the recombination mechanism of the leader hoisting lever and the hoisting/lowering lever of the present invention allows the displacement of the leader hoisting lever and the hoisting/hoisting lever to be controlled by the respective control means via a link mechanism. In a pile driver equipped with a transmission operation system, one pivot part including at least one hoisting/lowering lever and its transmission system link mechanism, and one pivot part including a leader hoisting lever and its transmission system link mechanism. and an inner shaft that is rotatably supported, and an outer shaft that is fitted externally to the inner shaft and that is rotatable relative to the inner shaft. The structure has a double structure shaft consisting of a shaft, and one end of either the inner or outer shaft has a first connecting means for connecting the leader hoisting lever side and a leader hoisting lever transmission system link side. A third connecting means for connecting the link side of the leader hoisting lever transmission system is provided at one end of the other of the inner and outer shafts, and a third connecting means is provided for connecting the link side of the leader hoisting lever transmission system. 3
The other end of the shaft provided with the connecting means has a fourth connecting means for connecting the hoisting/lowering lever side and a fifth connecting means for connecting the hoisting/lowering lever transmission system link side. At the other end of the shaft provided with the first and second connecting means, a sixth connecting means for connecting the link side of the hoisting/lowering lever transmission system is provided, and the leader The luffing lever transmission system link side is selectively connected to the second connection means or the third connection means, and the hoisting/lowering lever transmission system link side is connected to the fifth connection means.
or the sixth connecting means, respectively.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

4 and 5 show the lever mechanism assembled for pile driving work, and FIGS. 6 and 7 show the lever mechanism assembled for crane work.

4 and 5, a link 20 is connected to the leader hoisting lever 10 through a hinge joint 18, and a link 21 is connected to the hoisting/lowering lever 12 through a hinge joint 19. Fork ends 22 and 23 are attached to the lower ends of the links 20 and 21, respectively.

A pivot point between the link 20 and a link 40 that is connected to a control means (not shown) for leader raising/lowering operation, and a link 21 connected to a control means (not shown) for hoisting/lowering operation. The pivots with the link 41 are arranged so that their axes coincide with each other, and both pivots have a double structure shaft, which will be described later, as a common pivot axis.

The double structure shaft includes an inner shaft 26 that is rotatably supported, and an outer shaft 27 that is fitted onto the inner shaft 26 and is rotatable with respect to the inner shaft 26.

A collar 28 is fixed to one end of the inner shaft 26 via a pin 30, and another collar 29 is fixed to the other end via a pin 31. Said inner shaft 2
A collar 28 fixed to one end of the leader 6 has a first bracket 32 corresponding to the lower end of the link 20 connected to the leader undulating lever 10, and a leader undulating lever connected to a control means (not shown). a second bracket 33 corresponding to the end of the link 40 of the system;
is fixed. A third bracket 34 is fixed to one end of the outer shaft 27 in parallel with and spaced apart from the second bracket 33 at a constant distance. Further, at the other end of the outer shaft 27, there is a fourth bracket 35 corresponding to the lower end of the link 21 connected to the hoisting/lowering lever 12, and a hoisting bracket 35 connected to a control means (not shown). - A fifth bracket 36 corresponding to the end of the link 41 of the lowering operation system is fixed. Furthermore, a collar 29 fixed to the other end of the inner shaft 26 has a sixth bracket 36 spaced apart from the fifth bracket 36 and parallel to the fifth bracket 36.
A bracket 37 is fixed.

These first to sixth brackets 32 to 37 are
It is I-shaped and has a pin or bolt hole. A first bracket 32 fixed to a collar 28 fixed to one end of the inner shaft 26 has a lower end portion of the link 20 connected to the leader hoisting lever 10 via a fork end 22 and a pin 38. hinged. Also,
A fourth bracket 35 fixed to the other end of the outer shaft 27 includes another fork end 23 and a pin 3.
The lower end portion of the link 21 connected to the hoisting/lowering lever 12 via the lever 9 is hinged.
A second bracket 33 is fixed to the collar 28 fixed to one end of the inner shaft 26.
An end of a link 40 of the leader hoisting operation system is connected via a ball joint 42, and a fifth bracket 36 fixed to the outer shaft 27 is connected via a ball joint 43 to a link 40 for hoisting/lowering operations. The ends of the links 41 of the system are connected. The links 40, 41 are connected to the third and sixth brackets 34, 37 via ball joints 42, 43 when the lever mechanism is rearranged for crane work.

The ball joints 42 and 43 include a main body 44 having a screw hole, a ball portion 45 fitted to a spherical surface formed at one end of the main body 44, and a bolt portion 46 integrally provided with the ball portion 45. The main body 44 has a leader undulating, hoisting and
The bolt part 46 is screwed into the ends of the links 40 and 41 of the lowering operation system, and the bolt part 46 is connected to the second and third brackets 3.
selectively inserted into bolt holes formed in the third and sixth brackets 36 and 37;
It is configured to be fastened with a nut 47.

As mentioned above, when the lever mechanism is assembled for pile driving work, it functions as follows.

That is, as can be seen particularly from FIG. 4, when the leader undulation lever 10 is operated, the link 20 connected thereto, the fork end 22 provided at the lower end of the link 20, and the fork end 22 connected to the fork end 22 are activated. 1 bracket 32 and collar 2
8, the inner shaft 26 is rotated. When the inner shaft 26 rotates, the second bracket 33 rotates around the inner shaft 26, and the link 40 of the leader hoisting operation system moves linearly by the ball joint 42 connected thereto. The motion is transmitted to the control means, which actuates the leader to raise and lower the leader.

On the other hand, when the hoisting/lowering lever 12 is operated, the link 21 connected thereto, the fork end 23 provided at the lower end of the link 21, and the fourth bracket 35 connected to the fork end 23 are interlocked. Then, the outer shaft 27 is rotated around the inner shaft 26. When the outer shaft 27 rotates, the fifth bracket 36 fixed to the other end of the outer shaft 27 rotates, and the hoisting/lowering operation system is operated through the ball joint 43 connected to the fifth bracket 36. Link 41
moves linearly, and this linear movement is transmitted to the control means, which operates the control means to control the rotation direction and rotation speed of the drum shaft (not shown) of the hoisting/lowering drum.

Next, when changing from the aforementioned pile driving work to crane work, the second and fifth brackets 3
3 and 36 and the ball joints 42 and 43, and after rotating the bolt portions 46 of the ball joints 42 and 43 by 180 degrees as shown in FIG. 5, as shown in FIGS. 5 and 6. like,
A third bracket 34 fixed to one end of the outer shaft 27 is connected to a link 40 of the leader hoisting operation system via a ball joint 42, and is connected to the other end of the inner shaft 26 via a collar 29 and a pin 31. The ball joint 4 is connected to the sixth bracket 37 connected to the ball joint 4.
The link 21 of the hoisting/lowering operation system is connected through the link 3.

By rearranging it as shown in FIGS. 6 and 7, the hoisting/lowering lever 12 in the assembled state shown in FIGS. 4 and 5 acts as the boom hoisting lever 10', and serves as the leader hoisting lever. 10 acts as a hoisting/lowering lever 12.

That is, when the boom hoisting lever 10' is operated in FIGS. 6 and 7, the outer shaft 27 is rotated around the inner shaft 26 through the link 21 and the fork end 23 provided at the lower end of the link 21. Ru. As a result, the third bracket 34 fixed to one end of the outer shaft 27 rotates, and the link 40 is connected to the third bracket 34 via the ball joint 42 connected thereto.
moves in a straight line, and its operation is transmitted to the control means,
The boom is operated to raise and lower.

Furthermore, in the cases shown in FIGS. 6 and 7, when the hoisting/lowering lever 12 is operated, the link 20, the fork end 22 provided at the lower end of the link, and the first bracket connected thereto 3
2 and the collar 28, the inner shaft 26 is rotated. Due to the rotation of the inner shaft 26, the inner shaft 26
The sixth bracket 37 fixed to the collar 29 connected to the other end rotates, and the link 41 moves linearly through the ball joint 43 connected thereto, and this movement is transmitted to the control means. and rolled up/
The rotation direction and rotation speed of the drum shaft (not shown) of the lowering drum are controlled.

When rearranged as shown in FIGS. 6 and 7, the swing lever 9 and boom hoisting lever 10', which are most frequently used in crane work, can be placed in the ideal arrangement as shown in FIG. 3. Therefore, the driver can hold the swing lever 9 and the boom hoisting lever 10' with both hands in a natural posture and freely perform complex operations, thereby significantly improving work efficiency and operability.

In addition, when changing from pile driving work to crane work use, or conversely, when returning from crane work use to pile driving work use, the link 40 should be connected to the second or third link fixed to one end of the inner shaft 26. bracket 33,
34, the other link 41 is attached to the fifth or sixth bracket 36, 37 fixed to the other end of the outer shaft 27.
This can be easily done by selectively binding to.

In addition, in the present invention, as in the embodiments shown in FIGS. 4 to 7, the second or third bracket 3
3, 34 and link 40, fifth or sixth
If the ball joints 42, 43 are used to connect the brackets 36, 37 and the link 41, the function of the ball joints 42, 43 can absorb errors in the mounting angle during assembly and ensure smooth transmission of motion. However, it is not necessarily limited to this structure, and it is also possible to use an L-shaped connector,
In this case, there is no need to use a ball joint.

In addition, in this embodiment, the hoisting/lowering lever 12
Although an example has been shown in which the and leader undulating lever 10 are rearranged, other hoisting/lowering levers 11 and the leader undulating lever 10 may be rearranged.

Further, in the present invention, the leader undulating lever 1
The above-mentioned double structure shaft may be used as the pivot shaft for the pivot portion of the lever 0 and the pivot portion of the hoisting/lowering lever 12, and the two levers may be rearranged. Furthermore, if the axes of the pivot of the leader undulating lever and the pivot of the hoisting/lowering lever are misaligned, it is necessary to arrange both pivots so that their axes coincide.

As explained above, according to the present invention, when used for crane work, one of the hoisting/lowering levers and the leader hoisting lever can be rearranged. A leader hoisting lever as a boom hoisting lever can be placed at an ideal position, and a driver can freely perform a combined operation of operating the swing lever and boom hoisting lever with both hands in a natural posture. Therefore, it has the effect of significantly improving work efficiency and operability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire pile driver, Fig. 2 is a plan view showing the arrangement of the operating levers of the pile driver, Fig. 3 is a plan view showing the ideal arrangement of the operating levers for crane work, and Fig. 3 is a plan view showing the arrangement of the operating levers of the pile driver. Figure 4 is a perspective view of the inventive recombination mechanism assembled for pile driving work, Figure 5 is an enlarged sectional view taken along the line - in Figure 4, and Figure 6 shows the leader hoisting lever of the present invention and hoisting/lowering. FIG. 7 is a perspective view of a state in which the recombination mechanism with the lever has been reassembled for crane work, and FIG. 7 is an enlarged sectional view taken along the line - in FIG. 6. 1...Pile driver main body, 4...Leader, 7...Driver's seat, 8...Lever stand, 9...Swivel lever,
10...Leader hoisting lever, 10'...Boom hoisting lever, 11, 12...Hoisting/lowering lever, 2
0...link connected to the leader hoisting lever, 2
1... Link connected to the hoisting/lowering lever, 2
4, 25...bearing, 26...inner shaft of double structure shaft,
27...Same outer axis, 32-37...1st to 6th
Bracket, 40...Link for leader hoisting/lowering operation system, 41...Link for hoisting/lowering operation system, 42,
43...Ball joint.

Claims (1)

[Claims] 1 In a pile driver equipped with an operation system that transmits the displacement of the leader hoisting lever and the hoisting/lowering lever to the respective control means via a link mechanism, at least one hoisting/lowering lever and its transmission system link The axes of one pivot including the mechanism and one pivot including the leader undulation lever and its transmission link mechanism are made to coincide, the axes of both pivots are shared, and the axis is rotatable. It consists of a double structure shaft consisting of a supported inner shaft and an outer shaft that is fitted onto the inner shaft and is rotatable with respect to the inner shaft, and one end of either the inner or outer shaft has a , a first connecting means for connecting the leader hoisting lever side and a second connecting means for connecting the leader hoisting lever transmission system link side, and at one end of the other of the inner and outer shafts. is provided with a third connecting means for connecting the link side of the leader hoisting lever transmission system, and the third connecting means is provided for connecting the link side of the leader hoisting lever transmission system.
The other end of the shaft provided with the connecting means has a fourth connecting means for connecting the hoisting/lowering lever side and a fifth connecting means for connecting the hoisting/lowering lever transmission system link side. At the other end of the shaft provided with the first and second connecting means, a sixth connecting means for connecting the link side of the hoisting/lowering lever transmission system is provided, and the leader The luffing lever transmission system link side is selectively connected to the second connection means or the third connection means, and the hoisting/lowering lever transmission system link side is connected to the fifth connection means.
1. A mechanism for recombining a leader hoisting lever and a hoisting/lowering lever of a pile driver, characterized in that the leader hoisting lever and the hoisting/lowering lever are configured to be selectively coupled to a coupling means or a sixth coupling means.