JPH0124197Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a three-point support type pile driver that can be disassembled and
The present invention relates to a stay support structure that eliminates the need for separating and attaching the stay to the leader during assembly.

In general, the leader of a pile driver is erected vertically during operation, and its rear is supported by two stays. When such a leader is finished, it is necessary to lay it down horizontally and to divide it at an appropriate position so that it has a height and length suitable for transportation by a vehicle such as a trailer. On the other hand, in the stay, the support part is located considerably above the leader in order to hold the leader in a stable state, and therefore, the leader part separated by the division does not include this support part. There is. Therefore, it is necessary to remove the stay before dividing the leader, and it is also necessary to further lift the stay and load it onto a vehicle or the like. Such work is complicated and involves a lot of human and time loss.
In addition, the work efficiency was extremely poor because the work required to assemble was the reverse of the above.

Therefore, an object of this invention is to provide a stay support structure that allows a pile driver to be disassembled and assembled with the stay assembled to the leader.

Next, this invention will be explained based on an illustrated embodiment.

In FIG. 1, a pile driver 1 has a base machine 2 equipped with crawlers and the like so that it can be moved to any desired location. The lower end of the leader 4 is pivotally supported by the front protrusion 3 of the base machine 2. As shown in FIG. 2, this leader 4 is supported from behind by two stays 5, 5.
are each provided with stay cylinders 6, 6 and are extendable and retractable. Further, the lower ends of the stays 5, 5 are supported by a gantry device 7 placed on the base machine 2. The gantry device 7 is capable of moving up and down the supporting portions of the stays 5 and 5 by expanding and contracting gantry cylinders 8 and 8 that form part of a link mechanism.

Here, the wire rope 10 unwound from the winch 9 of the base machine 2 passes through a pulley 11 on the front projection 3, a pulley 12 at an intermediate position of the leader 4, and pulleys 13 and 14 at the upper end of the leader 4, and is suspended downward. There is. On the other hand, the leader elevating rope 16 unwound from the winch 15 passes through the pulley 17 of the gantry device 7 and is hung between the intermediate pulleys 17' in several ropes.
7' is connected to the pendant rope 18,
This pendant rope 18 is connected to the leader 4. Also, on both sides of the rear of base machine 2,
Outriggers 19, 19 are provided which protrude outward and provide auxiliary support for the pile driver 1 during pile driving work.

The leader 4 has a cylindrical shape as shown in FIG. 3, and is rotatable by a drive device (not shown) at the lower end. Further, six guide pipes 20 to 25 are arranged around the periphery, and two of these guide pipes 20 to 25 have an auger 26, and two guide pipes 22, 23 has a hammer 27, and the remaining two guide pipes 24 and 25 have sliding catches 28 disposed at the upper ends of the stays 5 and 5, which are slidable in the vertical direction. Further, the leader 4 can be separated into an extended leader 29 and a basic leader 30 at point A in FIG.

Further, the leader 4 is provided with locking portions 31 and 32 for engaging the sliding catch 28 of the stays 5 and 5 at two locations, points B and C in FIG. 1, and these structures are shown in FIGS. The explanation will be given according to FIG.

In FIGS. 4 and 5, an inner cylinder 33 that rotates integrally with the extension leader 29 is located at a part B of the extension leader 29, and bearings 34, 3 are connected to the inner cylinder 33.
An outer cylinder 36 is disposed concentrically with the cylinder 5 interposed therebetween. The inner cylinder 33 has a hole 3 through which a pin 38 of a holder lock 37 installed inside the cylinder can be inserted.
9 is bored therein, and a similar hole 40 is also bored in the outer cylinder 36. Therefore, when the pin 38 is inserted into the holes 39 and 40 as shown, the outer cylinder 36 becomes an integral structure with the inner cylinder 33. The pendant rope 18 is connected to a part of the outer cylinder 36, and the pulley 12 of the wire rope 10 is further supported. Further, when the outer cylinder 36 is locked with the inner cylinder 33 by the holder lock 37, a sliding catch 28 is connected to the stays 5, 5 in line with the guide pipes 24, 25.
Connecting pipes 41 and 42 are provided to guide the locking portion 31, and a hole 45 is formed into which the tip of the protruding pin 44 of the sliding lock 43 of the sliding catch 28 can be inserted, forming the locking portion 31. are doing. Therefore, when the tip of the protruding pin 44 is inserted into the hole 45 as shown in the figure, the sliding catch 28 becomes locked with respect to the outer cylinder 36.

On the other hand, in FIG. 6, a locking portion 32 with the sliding catch 28 is disposed at a portion C of the basic reader 30, similar to the point B, and this locking portion 32 is provided with the locking portion 32 of the sliding catch 28. A hole 46 is bored into which the tip of the pin 44 of the riding lock 43 can be inserted.

Further, the structures of the holder lock 37 and the sliding lock 43 are the same, and the structure of these will be described with reference to the sliding lock 43 as a representative. In FIG. 7, the protruding pin 4
4 is formed with a flange 47 that serves as a stopper when the slider is protruded, and the flange 47 allows the slider to slide within a guide tube 48 fixed to the sliding catch 28. Further, in the upper part of the protruding pin 44, a long hole 51 provided at the tip of the arm 50 of the bell crank mechanism 49 is provided.
A pin 52 is installed so as to be inserted into the pin 52 . The bell crank mechanism 49 is pivotally supported by a shaft 54 of a support member 53 attached to the sliding catch 28, and one arm 55
is linked to the joint 56. The joint 56 is a cylindrical holder 57
It is connected via a nut 59 to a rod 58 protruding from inside, and a head 59' slidable within the holder 57 is connected to the other end of the rod 58. A spring 60 is disposed between the head 59' and the end of the holder 57, and the other end of the holder 57 is connected to a piston rod 63 of a hydraulic cylinder 62 via a cap 61. Hydraulic hoses 64 and 65 are connected to the hydraulic cylinder 62, and the rear end is connected to the sliding catch 28.
It is rotatably supported by a support member 66 attached to. Therefore, the hydraulic hose 6 of the hydraulic cylinder 62
When hydraulic pressure is applied to the 4 side, the piston rod 63 is retracted into the cylinder 67, and the rod 58 of the holder 57 is pulled via the spring 60. Therefore, the bell crank mechanism 4 connected to the rod 58
The arm 50 of 9 pushes the protruding pin 44, and the protruding pin 44 is locked by the flange 47 at the XX position in the figure. Next, when hydraulic pressure is applied to the hydraulic hose 65 side, the piston rod 63 protrudes from the cylinder 67, and the cap 61 of the holder 57 and the rod 58
The head 59' of the rod 58 comes into contact with the rod 58 and is pushed out. Therefore, the arm 50 of the bell crank mechanism 49 connected to the rod 58 pulls out the protruding pin 44, and the protruding pin 44 moves to the Y--Y position in the figure and comes out of the hole 45.

Furthermore, when inserting the protruding pin 44, the piston rod 63 is in a contracted state, that is, the protruding pin 44 is in a contracted state.
4 is always in a pushed-in state, so when the sliding catch 28 moves along the guide pipes 24, 25 and reaches the locking part 31 or 32, the protruding pin 44 is pushed into the hole 45 or 32. 46 automatically.

With the above configuration, in order to store the pile driver 1 in a transportable form by placing it on a transport vehicle such as a trailer after completing the work, the leader 4 is tilted forward from the state shown in FIG. , by operating the leader elevation rope 16 and tensioning the pendant rope 18, the leader 4
, the hydraulic cylinder 62 of the sliding catch 28 is extended to remove the protruding pin 44 from the hole 45 of the locking part 31, and then the leader elevating rope 16 is let out to tilt the leader 4. The catch 28 is connected to connecting pipes 41 and 42.
The leader 4 automatically descends along the guide pipes 24 and 25, and when the leader 4 reaches a nearly horizontal state as shown in FIG.
The protruding pin 44 of No. 8 is automatically inserted into the hole 46 of the locking part 32. Thereafter, when the extension leader 29 is separated and the height of the gantry device 7 is lowered to take the transport position, the pile driver 1 will be in the state shown in FIG. 1B.

In the present invention, each of the basic leader and the extension leader of the leader is provided with a guide pipe for longitudinally guiding the sliding catch attached to the end of the stay, while the basic leader and the extension leader are connected. When the guide pipes are aligned, the sliding catch is attached so that it can move beyond these joints, and when the guide pipe on the extension leader side has the leader almost upright, that is, during pile driving work, the sliding catch is attached to the extension leader side. The guide pipe on the basic leader side is provided with a locking part that locks the sliding catch when the reader is in a nearly horizontal state, that is, when it is stored, so that the reader can be easily This can be done with the stay attached without requiring any manual work, so it is possible to speed up the storage and assembly work of the pile driver. In addition, when the leader is positioned horizontally, the sliding catch is located on the basic leader side and is locked to its locking part, so the work of separating the extension leader from the basic leader for trailer transport is easy. This can be done without the need for removal. Therefore, the storage operation is made easier and faster, and since the stay can be used as a support for the basic leader during transportation by a trailer or the like, there is an advantage that the transportation operation can be carried out safely.

[Brief explanation of the drawing]

The figures show an embodiment of this invention. Figure 1 is an overall view of the pile driver, Figure 1 A is a partial view showing the leader in a horizontally supported state, and Figure 1 B shows the state during transportation. Partial view, Fig. 2 is a side view of Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a partial sectional view showing the state in which the sliding catch is locked in the upper locking part of the leader. 5 is a schematic sectional view taken along the line -- in FIG. 4, FIG. 6 is a partial sectional view of the lower locking portion of the leader, and FIG. 7 is a detailed view of the sliding lock. 1... Pile driver, 4... Leader, 5, 5... Stay, 24, 25... Guide pipe, 28... Sliding catch, 31, 32... Locking part, 3
3... Inner cylinder, 34, 35... Bearing, 36... Outer cylinder, 37... Holder lock, 41, 42... Connecting pipe, 43... Sliding lock.

Claims (1)

[Scope of utility model registration request] A leader is provided with a basic leader whose one end is pivotally supported at the front part of the base machine, and an extension leader which is separably connected to the other end of the basic leader, and this leader is extendable and retractable from the rear part of the base machine. In a three-point support type pile driver supported by two stays, each of the basic leader and the extension leader of the leader has a sliding catch attached to the end of the stay in the longitudinal direction. a guide pipe for guiding the base leader and the extension leader, the guide pipes are aligned with each other in a state where the basic leader and the extension leader are connected, and the sliding catch is mounted so as to be movable beyond the connecting portion thereof; Further, the guide pipe on the extension leader side is provided with a locking portion that locks the sliding catch when the leader is held almost upright, that is, during pile driving work, and the guide pipe on the basic leader side is provided with the locking portion that locks the sliding catch when the leader is held almost upright, that is, during pile driving work. A stay support structure for a pile driver, which is provided with locking portions that lock the sliding catch when the leader is in a substantially horizontal state, that is, when it is stored.