JPH076191B2 - Pile driver - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] The present invention relates to a pile driver used for driving piles such as boundaries.

[0002]

2. Description of the Related Art In a conventional pile driving machine, a weight is connected along a leader with a wire, and the wire is wound mechanically or by a winch driven by a hydraulic motor, an electric motor or the like, and then powered by a clutch or the like. It is a structure in which the weight is dropped while the wire is loosened, and the head of the pile is hit and driven by dropping the weight.

Since this conventional structure requires a wire and a winch, it is necessary to attach a winch and a clutch device to this machine or a leader in order to attach it to the tip of a boom or arm of a hydraulic excavator or the like as an attachment. The structure became complicated, and failures such as twisting due to wires, entanglement, and cutting occurred frequently. Also,
With the wire type, it was not structurally easy to pull out the driven pile.

[0004]

According to the present invention, in order to eliminate the above-mentioned drawbacks, a wire or the like is not used, and it can be easily attached as an attachment of a hydraulic excavator or the like, and a pile driving work can be performed only by connecting a hydraulic circuit. Is to be configured as

[0005]

[Means for Solving the Problems] The pile driver (1) has a leader (4) pinned to the tip of a boom (3) such as a hydraulic excavator (2).
The cylinder (6) attached to the arm using (5) as a fulcrum allows it to swing and set its position. Leader (4)
A hydraulic cylinder (7) is supported by a pin (9), and rotation around the pin is blocked by a plate (10) fixed to the leader (4). A pair of chain rollers (11) are rotatably mounted on the tip of the rod (8) of the cylinder (7) so as to sandwich the rod (8), and two chains (12) are respectively installed. One end of this chain is connected to the plate (10) and the other end is a slide plate (1
Connect to 3).

This slide plate is slidable along a guide groove (14) provided in the longitudinal direction of the leader (4), and as the cylinder (7) expands and contracts, it moves up and down via a chain (12). The stroke can be double the stroke of a cylinder. The slide plate (13) has a gripping device (1
5) is attached, and the gripping device is provided with an arm (17) which is opened and closed by expansion and contraction of the gripping cylinder (16). The stroke for moving up and down the slide plate is also the stroke for the gripping device. As shown by the imaginary line in FIG. 1, the distance from the optimum position (H) to the lowest position (L) is raised or lowered.

A pole (2) installed vertically in parallel with the leader (4)
(0) is slidably supported by a guide pipe (19) vertically provided at the tip of a support plate (18) attached to the upper stage of the reader, and a cylindrical weight (21) is mounted on the pole (20). It is mounted slidably, the fall prevention bush (23) is fixed to the lower part of the pole, the cylinder (24) is attached to the lower end, and the head of the pile (25) is inserted into this. A step portion (22) is provided below the weight to prevent slipping when gripped by the gripping device (15).

[0008]

[Operation] In the pile driving machine (1) having the above configuration, the position of the leader (4) is set, and the pile (25) is attached to the cylindrical body (24) at the lower end of the juxtaposed pole (20). After inserting the head, grasp the step (22) of the weight (21) with the arm (17) of the grasping device (15) and operate the hydraulic cylinder (7) to grasp it through the chain (12). The device (15) is lifted to lift the weight (21), the arm (17) of the device is opened at an appropriate position, the weight is allowed to fall freely, and the pile is piled.
Hit the head of (25). By repeating this work, the pile is driven to the ground.

When pulling out the pile (25), a gripping device
Lower (15) to a position where you can grasp the head of the pile (25) and arm the pile.
By grasping with (17) and operating the hydraulic cylinder (7) to raise the grasping device, it can be easily pulled out.

[0010]

[Embodiment] As shown in FIG. 1, a leader (4) installed vertically at the tip of a boom (3) such as a hydraulic excavator (2) uses a pin (5) as a fulcrum, as shown in FIG. Mounted on arm
The cylinder (6) is mounted so as to be swingable and positionable, and the hydraulic cylinder (7) mounted on the reader is provided with a plate (10) for preventing rotation of the support pin (9),
Install a pair of chain rollers (1
1) is installed rotatably with a rod in between, and a double chain
(12) are respectively installed, one end of the chain is connected to the plate (10), and the other end is connected to the slide plate (13).

The slide plate is slidable along a guide groove (14) provided in the longitudinal direction of the leader (4), and the gripping device (1
5) Install. This gripping device (15) has an arm (17) which is opened and closed by expanding and contracting a gripping cylinder (16) as shown in FIG.
To provide. The pole (20) installed vertically in parallel with the leader,
Support plate (18) attached to the top of the reader as shown in FIG.
It is slidably supported by a guide pipe (19) vertically provided at the tip of the. The weight (21) slidably attached to this pole (20) forms a step (22) at the bottom to prevent slipping when gripped by the gripping device (15), and prevents the weight from falling to the lower stage of the pole. A bushing (23) is fixed, and a cylinder (24) into which the head of the pile (25) is inserted is attached to the lower end to form the pile driver (1).

In the embodiment of the present invention, only the pile is mentioned as the object to be hit, but it goes without saying that the present invention can be carried out for mechanization of the hammering work by a human. For example, it is a gate of a casting, a strain relief after welding an iron product, and the like.

[0013]

Since the present invention has the above-mentioned structure, it can be easily attached as an attachment for a hydraulic excavator or the like, and the pile driving work can be performed simply by connecting the hydraulic circuits, which is very convenient. In addition, the driven piles can be easily removed with a gripping device.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a product of the present invention.

FIG. 2 is an enlarged plan view of a gripping device.

FIG. 3 is a view on arrow A in FIG.

[Explanation of symbols]

 2 Hydraulic excavator 3 Boom 4 Leader 7 Cylinder 12 Chain 15 Grasping device 20 Pole 21 Weight 24 Cylinder 25 Pile

Claims (1)

[Claims] 1. A cylinder (7) provided on a leader (4) swingably attached to the tip of a boom (3) such as a hydraulic excavator (2).
A gripping device (15) that moves up and down along the leader through the chain (12) by the expansion and contraction of the leader is provided, and a weight (21) that moves up and down by the gripping device is used with the pole (20) installed in parallel with the leader as a guide. A pile driving machine, characterized in that a cylinder (24) into which a head of a pile (25) is inserted is attached to a lower end portion of the pole.