JPH0149851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for storing a pile driver in transportable form.

Conventionally, pile drivers have to be transported on trailers or the like, and various methods have been devised to store the leader and stay at the height and length determined by law. However, these methods are convenient in that the leader and stay are simply separated and made into separate bodies, and storing and assembling them is complicated and involves a lot of human and time loss. Ta.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for easily storing a pile driver, especially storing a leader and a stay.

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 support portions of the stays 5, 5 simply by expanding and contracting gantry cylinders 8, 8, which form part of the 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. ing. 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 wound around the intermediate pulley 17'.
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.

As shown in FIG. 3, the leader 4 has a cylindrical shape 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 are equipped with an auger 2.
6, two more guide pipes 22 and 23 have hammers 27, and the remaining two guide pipes 2
4 and 25, a sliding catch 28 disposed at the tips of the stays 5 and 5 is 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.

The leader 4 also locks the locking portions 31, 32 of the stays 5, 5 with the sliding catch 28 into the first position.
They are provided at two locations, point B and point C in the figure, and their structures will be explained with reference to FIGS. 4 to 6.

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 arranged 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 integral with the inner cylinder 33. The pendant rope 18 is connected to a portion 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 2 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. is forming. Therefore, as shown in the drawing, the protruding pin 44
When the tip is inserted into the hole 45, 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 provided at a portion of the basic reader 30 at a point C, similar to the point B. A hole 46 is drilled into which the tip of the pin 44 of the sliding lock 43 can be inserted. Further, the holder lock 37 and the sliding lock 43 have the same structure,
Hydraulic cylinders 47 and 48 are provided, respectively, so that the projecting pins 38 and 44 can be extended and retracted. Furthermore, during the tilting operation of the leader 4, the protruding pin 44 of the sliding lock 43 is always elastically pressed against the outer cylinder 36 side, so that the sliding catch 28 can be moved toward the guide pipe 24, 25 and reaches the locking portion 31 or 32, the protruding pin 44 is automatically inserted into the hole 45 or 46.

With the above-described configuration, the pile driver 1 can be transformed into a form suitable for being placed on a transport vehicle such as a trailer and transported after the work is completed, and this process is carried out as follows (a). It is carried out at the stage of ~ (nu).

(a) Extend the stay cylinder 6 of the stay 5 by an appropriate amount to tilt the leader 4 slightly forward.

(b) Tension the pendant rope 18, remove the sliding lock 43 of the sliding catch 28, and attach the leader 4 to the pendant rope 18.
Support only by.

(c) When the pendant rope 18 is gradually loosened to further tilt the leader 4, the sliding catch 28 moves downward along the leader 4.

(d) When the leader 4 reaches a substantially horizontal state, the sliding catch 28 is locked at the fixed portion C position below the leader 4.

(e) The tip of the leader 4 is supported from below by the support 49, the pendant rope 18 is further loosened, and the leader 4 is supported only by the stay 5. (See Figure 1 A) (f) Remove the extension leader 29 from the basic leader 30.

(G) Using the pulley 50 at the tip of the basic leader 30, lift the extension leader 29 and stack it on the trailer T or other transportation means.

(H) Extend the gantry cylinder 8 of the gantry device 7 so that the height of the gantry device 7 is at its lowest level.

(li) The stay cylinder 6 of the stay 5 is adjusted for expansion and contraction to bring the height of the basic leader 30 to the state at the time of transportation. (See Figure 1 B) (N) Place it on the trailer T. (See Figure 7) As described above, the present invention is assembled in a vertical state in which the lower end of the leader is pivotally supported on the front part of the base machine, and the leader is supported from the rear by a stay that connects the lower end to the rear part of the base machine. This is a method of storing a pile driver in a form suitable for trailer transport, in which the stay is extended, the leader is slightly tilted forward, and the end is unwound from the winch of the base machine. While tensioning the pendant rope connected to the leader, the engagement between the upper locking part of the leader and the locking tool provided at the tip of the stay is released, and then the leader is connected to the pendant. While supporting only with a rope, the stay is tilted further forward, and the locking tool of the stay is moved below the leader along a guide member attached to the leader, and when the leader is tilted to a nearly horizontal state, the stay is tilted forward. The locking tool is engaged with the lower locking part of the leader to support the leader again only by the stay, and then the leader is connected to the upper locking part and the lower locking part. A method for storing a pile driver, characterized in that the pile driver is stored in a trailer transport mode with the extension leader separated from the basic leader on the base machine side by being divided between the stop part and the extension leader. , has the following effects.

(a) The locking tool of the stay moves between the upper locking part and the lower locking part beyond the dividing point of the leader, and these positions can be set arbitrarily. The upper locking part, which is the locking part of the leader during pile driving work, is placed in the optimal position for supporting the upright leader, and the lower locking part is placed in the optimal position for horizontally supporting the basic leader. Furthermore, the dividing points of the leader can be set so that the basic leader has a length suitable for trailer transportation, which contributes to the stability and reliability of pile driving work and storage work, especially for large diameter piles. To safely and reliably divide and store a large leader used in a commercial pile driver without removing the stay from the leader.

(b) Since the leader is supported by a pendant rope while the retainer of the stay moves between the upper retaining part and the lower retaining part beyond the dividing point of the leader, Sudden tilting of the leader when moving the locking tool is prevented, contributing to the safety and reliability of the storage operation.

(c) Also, by tilting the leader forward with the pendant rope under tension, the locking tool of the stay is moved from the extension leader side to the basic leader side along the guide member, so the locking tool can be easily moved.

(d) In addition, since the retainer of the stay is moved along the guide member to the basic leader side of the base machine and then the extension leader is separated from the basic leader, the weight of the separated extension leader is reduced. This improves the separation workability and transportability of the extension leader.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; FIG. 1 is an overall view of the pile driver, FIG. 1 A and B are partial views showing changes in the leader during storage, and FIG. 3 is a sectional view taken along the - line in FIG. 1, FIG. 4 is a partial sectional view showing the state in which the sliding catch is locked to the upper locking part of the leader, and FIG. 6 is a partial sectional view of the lower locking part of the leader, and FIG. 7 is an overall view showing the pile driver loaded on a trailer. 1... Pile driver, 2... Base machine, 4... Leader, 5, 5... Stay, 24, 25... Guide pipe, 28... Sliding catch, 29
...Extended leader, 30...Basic leader, 31,3
2...Locking portion, 41, 42...Connecting pipe.

Claims (1)

[Claims] 1. A pile driver assembled vertically, with the lower end of the leader pivoted to the front of the base machine and the leader supported from the rear by a stay connected to the rear of the base machine, is converted into a form suitable for trailer transport. In this method, the stay is extended, the leader is slightly tilted forward, and the pendant rope, which is unwound from the winch of the base machine and whose end is connected to the leader, is tensioned. The engagement between the upper locking part of the leader and the locking tool provided at the tip of the stay is released, and then the leader is tilted further forward while being supported only by the pendant rope, and the stay is The locking tool of the stay is moved below the leader along a guide member attached to the leader, and when the leader is tilted to a nearly horizontal state, the locking tool of the stay is moved to the lower side of the leader. The leader is again supported only by the stay, and then the leader is divided between the upper locking part and the lower locking part, and the leader is connected to the base machine side. With the extension leader separated from the basic reader,
A method for storing a pile driver, comprising storing the pile driver in a trailer transport mode.