JP2781159B2 - Leader for low space and pile driver equipped with this - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile driver having a leader. In particular, the present invention relates to a pile driver suitable for pile driving and excavation in a low space, such as a pedestrian bridge, a bridge girder, an underpass, in a tunnel or on a premises, where height is limited.

[0002]

2. Description of the Related Art A pile driving machine (4) having a leader (7) is shown in FIG.
As shown in the figure, a tubular leader support portion (5) is swingably mounted on the tip of a front bracket (41) protruding from the front of the bogie (40).
One end of a cylinder device (42) is attached to the left and right of the rear part of the cart (40). The reader (7) is mounted with the lower portion standing upright on the top surface of the cylinder of the reader support portion (5), and the upper portion is mounted on the cylinder device.
It is attached to the piston rod of (42).

[0003] A desired drilling device (6) having a drop hammer, a drilling shaft and the like is provided with a guide rod (71) (71) of a leader (7).
To be slidably mounted on the reader (7). The excavator (6) is suspended from a wire rope (76) by a wire rope attachment mechanism (63) at the upper end. Wire rope (76)
Is wound around a winch (75) provided behind the pile driver (4) via a sheave (77) protrudingly supported at the upper end of the leader (7). Drilling rig by driving
(6) moves up and down along the leader (7), and can perform stakeout, excavation, etc. within the range of the leader length.

[0004]

For construction in low spaces, such as under a pedestrian bridge, under a bridge girder, under an overpass, in a tunnel, on a premises, etc., there is a limit to the height of the entire pile driver, that is, the standing height of the leader. receive.
In the pile driver having the above configuration, the upper surface of the leader support (5) is located at a height of about 2 m to 2.5 m from the ground,
The leader (7) is a leader support even if the height is reduced.
Since the excavator (6) stands upright on the upper surface of (5), the stroke of the excavator (6) is extremely short, and it is not possible to work in a low space of about 4 to 5 m in height.

[0005] To deal with this, dedicated machines for low space are also in practical use, but are expensive and limited in number.

SUMMARY OF THE INVENTION An object of the present invention is to provide a leader which can be mounted on an existing pile driver having a cylindrical leader support, and which is particularly suitable for work in a low space and a pile driver equipped with this leader. To provide.

[0007]

SUMMARY OF THE INVENTION A reader for low space according to the present invention.
(1) The space below the leader support (5) of the pile driver (4) is used for lifting and lowering of the excavator (6). A leader bracket (2), which can be connected to the upper surface of the cylinder of the part (5), protrudes. When the leader bracket (2) is connected to the upper surface of the cylinder of the leader support (5), the lower part of the leader (1) is located below the leader bracket (2). In addition, the pile driver (4) provided with the leader for low space of the present invention mounts the leader (1) having the above structure on the leader supporting part (5), and connects the upper part of the leader (1) to the bogie (40). The space is connected by an extendable cylinder device (42).

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, "front" means the direction in which a front bracket (41) of a pile driver (4) is provided. The pile driving machine (4) shown in FIG. 1 is one to which a known device is applied, and a front bracket (41) is protruded from a front part of a movable truck (40), and the front bracket (41) is provided. A leader support (5) is pivotally supported at the front end of the reader. As shown in FIG. 5, the leader support (5) is a cylindrical body.
A cross joint (52) is provided inside (51), one of the joints is pivotally supported by a horizontal support shaft (41a) provided at the tip of the front bracket (41), and the other orthogonal joint is a cylindrical body. It is pivoted to (51). Therefore, the leader supporting portion (5) can swing back and forth, left and right. A flange (54) protrudes from the upper surface of the reader supporting portion (5), and a screw hole (53) for fastening a leader bracket (2) of the low space reader (1) described later with a bolt is formed in the flange (54). ). One end of a cylinder device (42), which expands and contracts by a hydraulic pump (not shown) one at a time on the left and right sides, is swingably engaged with the front upper portion of the cart (40). The piston rod at the other end of the cylinder device (42) has a through hole (42a) that is pivotally supported by a bracket (33) of a cylinder engaging member (3) of the leader (1) described later. The cylinder device (42) may be provided at the rear of the bogie (40). However, when the overall length of the reader (1) is reduced, the inclination of the cylinder device (42) increases. May get in the way.
Therefore, in the case of the pile driver (4) in which the cylinder device (42) is provided only at the rear portion of the bogie (40), it is desirable to separately attach the cylinder device (42) to the front portion of the bogie (40). The above is a known pile driver.

As shown in FIGS. 2 to 4, the low space reader (1) is a tubular body having a circular cross section slightly shorter than the height of the working space, and has two guide rods parallel to the front part. (11) (11)
An endless chain (14) is provided between the guide rods (11) and (11) as an excavating device raising / lowering means.
The sprockets (12) (12) provided at the upper and lower ends of the interior and the chain driving means (13) provided between the sprockets (12) (12) are provided in mesh with each other. The sprockets (12) and (12) partially protrude from through holes (not shown) formed in the side surfaces of the leader (1), and guide the outer peripheral surfaces of the leader (1) to guide rods (11) and (11).
The chain (14) runs in parallel with. When an excavator (6) described later is connected to the chain (14) and the chain driving means (13) is driven, the excavator (6) moves up and down along the leader (1). A desired drilling device (6) having a drop hammer, a drilling shaft, etc. is slidably fitted on the guide rod (11) of the reader (1) and connected to the chain (14) so that it can move up and down. It is attached to the reader (1).

A leader bracket (2), which can be engaged with the leader support (5), is formed projecting from an intermediate portion on the rear surface of the leader (1). In the present invention, the “intermediate portion of the reader (1)” is not limited to １ ／ of the length of the reader (1), but excludes the upper and lower ends of the reader (1). It means any position on the side. Leader bracket (2)
Has a support plate (23) projecting horizontally from the leader and a fixed plate (21) vertically attached to the reader (1) and the support plate (23), as shown in FIGS. In the periphery of (23), when this is placed on the flange (54) of the reader supporting portion (5), a hole (22) corresponding to a plurality of through holes (53) formed in the flange (54).
Equipped. The leader bracket (2) is a leader support (5)
When attached to the reader, the reader (1) projects from the reader (1) so as to be parallel to the reader support (5), and the reader support (5)
When the reader bracket (2) is fixed to the reader bracket (2), the lower end of the reader (1) extends below the lower end of the reader support (5), and is mounted at a height slightly floating above the ground.

The reader (1) has two plates (31) (31) projecting rearward from the reader (1) above the mounting position of the leader bracket (2). The tip of the body (31) forms a cylinder engaging member (3) connected by a plate (32) having two brackets (33) and (33). Each bracket (33) (33) of the cylinder engaging member (3) is connected to the tip of the piston rod of the cylinder device (42) when the leader (1) is attached to the pile driver (4). Since the reader supporting portion (5) is freely rotatable in a two-dimensional direction like the conventional device,
(1) can be set in a vertical posture with respect to the ground.

The leader (1) is attached to the pile driving machine (4) having the above configuration. Attach the reader (1) first,
And lift the leader bracket on the leader support (5).
(2) is placed, and the hole (53) of the leader support (5) is aligned with the hole (22) of the fixing plate (21) of the leader bracket (2). ) Fasten each other with bolts and fix. Next, the through holes (42a) of the cylinder device (42) correspond to the through holes (35) of the bracket (33) of the cylinder engaging member (3), respectively, and are pivotally supported by a shaft (34). Through these steps, the leader (1) was attached to the pile driver (4).

When the reader (1) is ready to be mounted, the mounting center of the leader bracket (2) is
Offset from the center of (1) and the leader (1) is the leader support
It is attached in parallel with (5). Conventionally, leader support
The leader is mounted on the top surface of the cylinder of (5), but the leader (1) of the present invention has a limited height because the lower end can be extended below the leader supporting part (5). When the leader (1) is used in a space (low space), the leader (1) having almost the same length as the space can be used, and the excavator (6) can take a large stroke.

The reader (1) includes a known excavator equipped with a drop hammer or an excavation shaft according to a target operation.
(6) is attached. The excavator (6) is a device for slidably gripping the engagement arm (61) protruding left and right with the guide rod (11), and a chain provided between the engagement arms (61). The connecting member (62) is connected to the endless chain (14) of the reader (1), thereby being attached to the reader (1). Since the excavator (6) is moved up and down by the chain (14), the wire rope mounting mechanism of the conventional excavator is not required, the apparatus can be downsized in the vertical direction, and the stroke of the excavator (6) can be increased. I can do it.

Hereinafter, a pile driver equipped with the leader (1) of the present invention.
The operation of (4) will be described. Adjustment of the standing angle of the reader (1) is performed by expansion and contraction of the cylinder device (42). That is, by adjusting the length of expansion and contraction of the left and right cylinder devices (42), the inclination of the reader (1) is adjusted to the front, rear, left and right about the swingable leader support (5). Drilling rig
(6) drives the chain drive means (13) to drive the chain (14)
Is moved up and down along the reader (1). When the chain (14) runs, the excavator (6)
Slides up and down along the leader (1) with the engaging arm (61) gripping the guide rod (11).

When drilling a hole exceeding the length of the leader (1) using the leader (1) having the above configuration and the pile driver (4) provided with the leader (1), an excavator is required. (6) is raised to mount the digging shaft, and simultaneously with the rotation of the digging shaft, the digging device (6) is lowered by driving the chain driving means (13). When the drilling rig (6) descends to the bottom, the drilling axis is
Remove from (6), raise the excavator (6), connect the excavator shaft and the excavator (6) with a joint shaft, drive the excavator (6) again to rotate the excavator, and at the same time The step of lowering the excavator (6) may be repeated.

The description of the embodiments of the present invention is intended to explain the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

For example, the cross-sectional shape of the reader (1) is not limited to a circle but may be a rectangle or the like, and a jack (15) (see FIG. 2) or the like is provided under the reader (1) so as to be able to protrude and retract. do it,
The shaking of the reader (1) can also be prevented. Further, the excavating device elevating means is not limited to the one driven by the chain drive.For example, a rack is formed on the side surface of the reader over substantially the entire length, and the excavating device includes a pinion connected to the rotary driving means, Means (not shown) for moving the excavator up and down by meshing the rack and the pinion can also be used. Furthermore,
A method in which the excavating / lowering means is suspended by a wire rope may be used as in the related art. In the case of wire rope suspension, a mechanism for attaching the wire rope to the excavator is required, and a sheave needs to be attached to the upper end of the leader. May be shorter. Therefore, as the excavator lifting / lowering means of the leader for low space, the rack /
It is desirable to use pinion or chain drive means.

[0019]

The leader (1) for low space according to the present invention is displaced laterally from the leader support (5) and arranged in parallel with the leader support (5). When attached to
The space below the leader support (5) can be used effectively. Therefore, a large stroke of the excavator (6) can be taken,
When working in a low space with height restrictions, there is no need to use a dedicated machine. Also, a trolley (40) and a reader support (5),
An existing device can be applied to the cylinder device (42). In a high space, if the low space reader is replaced with a conventional reader, the same operation as the conventional device (FIG. 6) can be performed.

[Brief description of the drawings]

FIG. 1 is a side view of a pile driver having a leader for low space of the present invention.

FIG. 2 is a side view of the reader for low space of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a plan view of FIG. 2;

FIG. 5 is a perspective view of a reader support.

FIG. 6 is a side view of a conventional pile driver having a leader.

[Explanation of symbols]

 (1) Leader for low space (2) Leader bracket (3) Cylinder engaging tool (4) Pile driver (5) Leader support (6) Excavator

Claims (2)

(57) [Claims] An excavator (6) is removably attached to a leader support (5) provided at the tip of a front bracket (41) protruding from a front part of a bogie (40). In the supporting reader, a leader bracket (2) that can be connected to the upper surface of the cylinder of the reader supporting part (5) is protruded from a middle part of the side of the reader (1). leader. 2. A trolley (40) capable of traveling, a front bracket (41) protruding from a front portion of the trolley (40), and a cylindrical shape supported by the front bracket (41) so as to be swingable. A reader support (5), a reader (1) attached to the leader support (5) and supporting the excavator (6) so as to be able to move up and down, and a truck (40).
Telescopic cylinder device for connecting between the robot and the reader (1)
A pile driver equipped with a leader bracket (2) protruding from a middle part of a side surface of the leader (1), the leader bracket (2) being connected to an upper surface of a cylinder of the leader support part (5).
A pile driver having a cylinder engaging member (3) connected to the cylinder device (42) above the leader bracket (2) of (1).