JPH09279577A - Pile driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile driver to which initial speed is added. SOLUTION: A cylindrical pipe body welded to a supporting plate 4 at the upper end part of a leader L holds spring mechanism S through a holding part 1'. An automatic attaching/detaching device 2 is made slidable in the leader L by the lifting/lowering motion of a wire 3, and the automatic attaching/ detaching device 2 is provided with a claw-like grip part 2' closable so as to lift a weight W and to release it to make it fall by the vertical sliding motion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile driving machine for hammering piles or the like, particularly hammers to which initial velocity is applied, to drive the pile into the ground by applying a striking force.

[0002]

2. Description of the Related Art It is common practice to drive a pile or the like by dropping a hammer. However, in the case of conventional hammers, in order to obtain a large striking force against the driving resistance to the ground such as piles, the weight of the weight must be fairly heavy and the drop height, that is, the lifting height of the hammer must be remarkable. There wasn't. Therefore, the greater the weight of such a weight and the higher the lifting height of the hammer, the less stable the equipment is and the less maneuverability. In particular, the height of the leader that supports and guides the hammer is directly related to the falling moment, so it is desirable to make it as low as possible.

Further, since the weight of the weight affects the specifications and capabilities of winches, wires, etc., it is often difficult to increase the weight, which is disadvantageous in terms of stability. In addition, among the driving methods such as piles that are guided by the leader, the striking method that winds the lifting wire of the weight with a winch and raises it, releases the winch at a predetermined height and drops the weight. Since the resistance of the sheep when the wire passes through the sheep and the rotation resistance of the winch act, the loss of impact energy is larger than that of a free-falling weight.

[0004]

SUMMARY OF THE INVENTION The problem underlying the present invention is a drop hammer with an added initial velocity that does not have the above-mentioned drawbacks of conventional pile-in driving equipment guided by a leader. It is to provide a staking machine.

[0005]

According to the present invention, the above-mentioned problem is that a cylindrical tubular body welded to a support plate at the upper end of the leader carries a spring mechanism via a carrying part.
The automatic attachment / detachment device can slide inside the leader by the wire lifting / hanging motion, and the automatic attachment / detachment device can open / close by lifting and lowering the weight by the vertical sliding motion. It is solved by having a grip.

Further, in the pile driving machine according to the present invention, the opening and closing of the claw-shaped gripping portion of the automatic attachment / detachment device is performed by the jack incorporated in the automatic attachment / detachment device. In this pile driving machine, the shape of the portion of the automatic attachment / detachment device that performs the gripping function of the claw-shaped gripping portion has a shape that engages with the shape of the upper end portion of the weight.

According to the present invention, the compression of the spring mechanism is performed by engaging the weight with the claw-shaped grip portion of the automatic attachment / detachment device that slides upward in the leader by the lifting motion of the wire. The lifting is performed by lifting the spring by bringing the weight into contact with the lower end of the spring mechanism. Hereinafter, the present invention will be described in detail with reference to the embodiments illustrated in the accompanying drawings.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The weight W is shown in FIG. 1 in an open state. As shown in FIG. 1, the pile driving machine according to the present invention includes a leader L, and an upper end portion of the leader L is connected to a wire guide portion 7 via a support plate 4 by a fixing bolt 4 ′. A cylindrical tubular body 1 is welded to the support plate 4, and the cylindrical tubular body 1 holds a spring mechanism S by its supporting portion 1 '.

The automatic attachment / detachment device 2 is slidable in the leader L by the wire 3 lifting / suspending through the sheep block 13. The automatic attachment / detachment device 2 has a claw-shaped grip portion 2'at its lower end. The shape of the grip portion 2'is adapted to the shape of the head W'of the weight W described below, and is shaped so as to be engageable with the head in a shape-integral manner.

The automatic attachment / detachment device 2 has a holding structure for internally grasping by a jack J, which is not shown in detail, which is built in the automatic attachment / detachment device 2. Therefore, the space is small and the weight is light. This jack J can be configured as a hydraulic jack, a pneumatic jack, or an electric jack, and is connected via a hose 11 to a power source mounted on, for example, a crawler crane A.

The striking work of this pile driving machine is performed as follows. In the striking action step, the description starts from the working state in which the weight W is dropped downward. The automatic attachment / detachment device 2 moves downward in the leader L by rewinding the wire 3. At that time, the grip portion 2'of the automatic attachment / detachment device 2 is in a closed state. The descent ends when the grip portion 2'is fitted to the head of the weight W and stopped. Then, the jack J is operated to open the claws of the grip portion 2 '. This time,
The shape of the claws of the gripping portion 2 ′ is engaged with the head of the weight W in a groove shape to form an engagement state, the wire 3 is wound up in this state, and the weight W is also lifted together with the automatic attaching / detaching device 2. Be taken. Here, the shoulder W ″ of the head of the weight W contacts the lower end S ″ of the spring of the spring mechanism S, and in this state the automatic attachment / detachment device 2 is further raised and the spring is further compressed. When the compression of the spring reaches the limit, the jack J of the automatic attachment / detachment device 2 is actuated, the claw of the grip portion 2'is closed, and the instantaneous weight W
Is accelerated by the elastic force of the spring and suddenly falls.

At this time, the upward movement of the pressurized medium hose 11 for the jack J for opening and closing the claws of the grip portion 2'of the automatic attachment / detachment device 2 is performed by the hose reel 10 as described later. Therefore, the hose is not damaged. In the pile driving machine according to the present invention, as described above, the shape 2 ″ above the claw-shaped grip portion 2 ′ of the automatic attachment / detachment device 2 conforms to the shape of the head W ′ of the weight W. As a result, the grip portion 2'and the weight W can be engaged integrally with the dovetail groove shape, and even if the automatic attachment / detachment device 2 is suddenly raised, the weight W and the grip portion are The engagement with 2'is not disengaged.

A hose reel designated by the reference numeral 10 is shown. As described above, the opening and closing of the claw-shaped grip portion 2'of the automatic attachment / detachment device 2 is performed by the jack J. As the jack J, a jack capable of pushing and pulling a rod such as a pneumatic jack, a hydraulic jack, and an electric jack can be used. The operation of the jack J is performed by mounting a power source on the base machine A or utilizing the power of the base machine A. A hose or conduit is provided to transmit this power. In this embodiment, the hose reel 1
The hose 11 is connected to the jack J of the automatic attachment / detachment device 2 via 0. When the automatic attaching / detaching device 2 descends, the hose 1
1 follows the movement, but when hoisting the weight W after gripping, if the hose is left as it is, "slack" is generated by the amount of hoisting, and it interferes with the automatic attachment / detachment device 2 and the weight W. To damage or cut them. For this reason, it is necessary to raise the hose by hand on the top side of the leader so that "slack" does not occur. The hose reel 10 is used for this purpose so that the hose can be pulled up with moderate force without damage. The hose reel 10 winds the hose with a constant force by, for example, a spring or hydraulic means.

FIG. 3 shows an overall view of the pile driving machine according to the present invention. In this figure, A is a crawler crane and P is a
Showed the pile to be hit. Since the crawler crane is self-propelled as described above, it is possible to use the pile driving machine according to the present invention at any place.

[0015]

According to the present invention, in a pile driving machine such as a pile, the height of the leader can be reduced, and therefore the stability and maneuverability of the leader can be reliably achieved. Moreover, the impact energy is significantly increased by the configuration according to the present invention. Furthermore, when a crane with a small winch capacity is used, or when the weight of the weight is increased, the lifting capacity may be insufficient. In such a case, in the pile driving machine according to the present invention, it is possible to increase the lifting capacity by mounting the sheep on the automatic attaching / detaching device and using the automatic attaching / detaching device as a moving pulley.

[Brief description of drawings]

FIG. 1 is a view showing a state in which a weight is opened in a pile driving machine according to the present invention.

FIG. 2 is a diagram showing a state in which a weight is suspended in the pile driving machine according to the present invention.

FIG. 3 is an overall view of a pile driving machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tubular body 2 Automatic attachment / detachment device 2'Grip part 2 "Shape of grip part 3 Wire 4 Support plate 4'Fixing part 6 Boom 7 Wire guide part 10 Hose reel 11 Hose 13 Sheave block

[Procedure amendment]

[Submission date] April 30, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

[Figure 3]

Claims (4)

[Claims] 1. In a pile driving machine, a cylindrical tubular body (1) welded to a support plate (4) at an upper end portion of a leader (L) is provided with a spring mechanism (S) via a carrying portion (1 '). The automatic attachment / detachment device (2) can slide in the leader (L) by the lifting / suspending motion of the wire (3), and the automatic attachment / detachment device (2) slides vertically. The pile driving machine is provided with a claw-shaped gripping portion (2 ') that can be opened and closed so as to lift the weight (W) and release the weight (W). 2. A structure in which the claw-shaped gripping portion (2 ') of the automatic attachment / detachment device (2) is opened and closed by a jack (J) built in the automatic attachment / detachment device (2). The pile driving machine according to claim 1. 3. The shape of the portion of the automatic attachment / detachment device (2) that performs the gripping function of the claw-shaped gripping portion (2 ') is such that it engages with the shape of the upper end of the weight (W). The pile driving machine according to claim 2, wherein 4. The compression of the spring mechanism (S) is carried out by the wire (3).
The hook-shaped gripping portion (2 ') of the automatic attachment / detachment device (2) that slides upward in the leader (L) by the lifting motion of the hook engages with the weight (W) and lifts the weight. The pile driving machine according to claim 2, wherein the weight is brought into contact with the lower end of the spring mechanism (S) and the spring is pushed up.