JPH10339086A - Auger screw mounting and dismounting type low head pile driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shelter in even a narrow work area by moving a lower end part of a leader main body forward, backward, and to the right and left to fix the leader main body vertically by an expandable mechanism provided in relation to a catch fork. SOLUTION: A trunnion 4 is attached to a tip part of an arm 2 of a base machine 1 to suspend a leader main body 8. A lower end part of the leader main body 8 is supported through a catch fork 10 and a support member 17 of the base machine 1. The catch fork 10 and the support member 17 are engaged by a first hydraulic cylinder 11 which moves the support member 17 in the right and left directions and a second hydraulic cylinder 12 which moves the support member 17 in the forward and backward directions. For this reason, it is possible to move the support member 17 on which the lower end part of the leader main body 8 is fixed forward, backward, and to the right and left by the first and second hydraulic cylinders 11, 12 and position and fix the leader main body 8 vertically. Consequently, the construction in a narrow work area in which the work by a large pile driver is impossible becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auger screw detachable low-headed pile driver.

[0002]

2. Description of the Related Art When a subway is constructed by an open-cutting method, an earth retaining wall or an intermediate pile is used as an inexpensive soil-cement continuous wall method with less noise and vibration. This soil-cement continuous wall method is generally performed using a large pile driver with a triaxial auger speed reducer, which has a high construction speed, and in accordance with the required excavation height (auger screw length). In order to select a leader, a large pile driver (having a large base machine) with a high machine height will be selected.

[0003]

However, taking subway construction in a large city as an example, construction on an arterial road with heavy traffic usually requires securing half of the road as a work area at night when traffic is low. You are. In the daytime, work is suspended so as not to hinder traffic, and construction materials and equipment are evacuated to a narrow permanent work zone provided at the center of the road. Further, in order to vertically fix the tall reader A as shown in FIG. 9, it is necessary to operate the two long stays B by expanding and contracting them with a hydraulic cylinder or the like. Therefore, there are the following problems. A large pile driver cannot evacuate in a narrow permanent work zone with a road lane of two lanes. When assembling and dismantling a pile driver with a high machine height (leader height), the working space becomes large and it is difficult to secure this space. Ground obstacles (eg, highway overpass,
Railway bridge, electric wire, communication line, etc.), horizontal movement becomes difficult and construction is not possible.

[0004] Therefore, the present invention enables the shunter to retreat even in a narrow work zone, assemble and disassemble a pile driver in a small work space, and avoid ground obstacles on a main road.
In addition, an object of the present invention is to provide an auger screw detachable low headless pile driving machine in which augmented auger screws are stored in the rear portion of the leader body and can be easily supplied.

[0005]

As a technical means for achieving the above-mentioned object, the present invention hangs a leader body via a trunnion at a tip end of an arm of a base machine, and comprises a lower end portion of the leader body. Is supported by a catch hawk attached to the lower part of the base machine, and a telescopic mechanism provided in connection with the catch hawk moves the lower end of the leader body back and forth, right and left, and vertically fixes the leader body. The gist is a configuration that can be used. Further, a storage portion for augmented auger screws is provided at the rear portion of the leader body, and this storage portion is provided with a screw moving device for moving the augmented auger screw back and forth, while holding the augmented auger screw in an upright position, and in the left, right, and / or front and rear directions. And the addition screw has a flange formed at the upper end thereof, and a fitting for connection is attached to a lower portion thereof.

[0006]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an overall view of a pile driver according to the present invention. Reference numeral 1 denotes a base machine, which is provided with an arm 2 which swings up and down by a hydraulic cylinder 3, and a trunnion is provided at the tip of the arm 2. 4 and an auger elevating hydraulic winch 5, an auxiliary winch 6, a slide sheave 7, and the like.

As shown in FIG. 2, the trunnion 4 has a two-pronged reader body 8 suspended from the trunnion 4, and a sheave 9 is attached to a tip end thereof. The lower end of the leader 8
As shown in FIG. 3, the base machine 1 is supported via a catch hawk 10 pivotally supported at a tip end thereof and a support member 17 engaged with the catch hawk 10. Further, the leader body 8 can be divided into upper and lower portions with the connecting portion 8a as a boundary, and ladders 8b are attached to both sides.

As shown in FIG. 3, the catch hawk 10 and the support member 17 include a first hydraulic cylinder 11 for moving the support member 17 in the left-right direction and a first hydraulic cylinder 11 for moving the support member 17 in the front-rear direction. And two hydraulic cylinders 12. Therefore, the support member 17 to which the lower end of the leader 8 is fixed is attached to the first and second hydraulic cinders 1.
The leader body 8 can be positioned and fixed vertically by moving it forward, backward, left and right by means of 1 and 12. 8c is an outrigger provided at the lower end of the reader body 8.

Returning to FIG. 1, reference numeral 13 denotes a hydraulic auger, which is attached to the leader body 8 so as to be vertically movable.
In addition, the wire rope 14 of the auger elevating hydraulic winch 5 is connected to the upper end of the hydraulic auger 13 through the slide sheave 7 and the sheave 9 and can be moved along the leader body 8 by the auger elevating hydraulic winch 5. It is like that.

At the rear of the leader body 8, there is provided a storage / supply unit for augmented auger screw 20. The storage / supply unit is provided with a screw moving device 15 for moving the augmented auger screw 20 back and forth, and an augmented auger screw 20. An auger holder moving device 16 is provided which can be held in an upright state and moved left and right and back and forth.

The screw moving device 15 is mounted at a right angle from the middle of the leader main body 8 to the rear, and a pair of left and right guide rails 15a and along the guide rails 15a as shown in FIG. A moving portion 15b that moves in the front-rear direction, and a grip portion 15c that moves in the vertical direction via a guide rail 15d on the front side of the moving portion 15b. And this grip part 15
c is fitted into the upper end of the auger auger screw 20, and is engaged with the groove 20c formed in the upper end by operating the pair of locking rods 15e, and the grip portion 15 is raised and stored. The additional auger screw 20 is picked up, the state is maintained, and the moving portion 15b is moved forward to position the hydraulic auger 13 directly below the hydraulic auger 13.
a is attached.

The auger holder moving device 16 is attached to the lower portion of the leader body 8 via the support member 17 (FIG. 3), and as shown in FIG. A roller moving device 19 is provided at both ends in the front-rear direction.

The lateral moving device 18 comprises a pair of guide rails 18a and a plurality of bogies 18b which are engaged with the guide rails 18a and move in the left-right direction. A holder 18c for holding a lower end portion is provided, and is formed so as to be movable in both left and right directions.

On the other hand, as shown in FIG. 6, the roller moving device 19 has a receiving stand 19a on which a truck 18b of the lateral moving device 18 is mounted. The guide rail 18a is provided on the upper surface of the receiving stand 19a. A pair of auxiliary guide rails 19b that can be connected to the vehicle are mounted, and wheel portions 19d composed of a plurality of rollers 19c are mounted on four places on the lower surface. or,
A pair of guide rails 19 are provided on both sides of the lower surface of the cradle 19a.
e, a guide piece 19f that engages with the guide rail 19e is provided via the guide piece 19f.
The upper part can be moved in any direction.
Reference numeral 19g denotes a fixing pin for preventing the carriage 18b placed on the receiving base 19a from moving, and 19h denotes a holding pin for preventing the receiving base 19a from moving when not in use.

The above-mentioned auger screw 20 is
As shown in FIG. 7, a flange portion 20a is formed at an upper end portion, and a metal fitting 20b is opposed to a lower portion of the flange portion 20a. The upper end portion is fitted with the lower end portion of another extending auger screw to form two flanges. The connection can be made by driving a pin (not shown).

The low aerial head pile driver with detachable auger screw constructed as described above has an additional auger screw 2
Excavation work of a predetermined depth is performed while successively adding 0, and this can be used for construction of retaining walls and intermediate piles in large-scale excavation work.

First, the first excavation operation is performed while lowering the hydraulic auger 13 with the first additional auger screw 20 ′ attached to the speed reducer 13 a, and once the hydraulic auger 13 reaches the lower end of the leader body 8, once The excavation is interrupted, the speed reducer 13a is removed from the upper end of the auger screw, the wire rope 14 is wound up by the auger elevating hydraulic winch 5, and the hydraulic auger 13 is raised to stand by at the original position.

The first additional auger screw 20 'detached from the speed reducer 13a is a pair of support rods, such as a hairpin, which are extended over the upper edge of a cylindrical casing 21 temporarily provided above the drilling hole as shown in FIG. The metal fitting 20b is received by 22 and is stably held in a suspended state.

After that, the lateral moving device 18 and the roller moving device 19 of the auger holder moving device 16 are appropriately driven, and a required one of the replenished auger screws 20 stored in an upright state at the rear portion of the leader body 8 is selected. Is selected and moved, and positioned just below the screw moving device 15.

At this time, as described above, the horizontal moving device 18 can be moved in either the left or right direction, and the roller moving device 19 can be moved in any of the front and rear directions. The row lateral movement device 18 is communicated. Therefore, different types of auger screws 20
Even if are stored together, it is possible to select a required one and quickly position it immediately below the screw moving device 15.

The replenishing auger screw 20 positioned directly below the screw moving device 15 has the upper end held by the knob 15c of the screw moving device 15, and the lower end removed from the holder 18c of the lateral moving device 18. Is moved to the front end by the moving unit 15b, and is positioned immediately below the hydraulic auger 13 that is on standby.

The extension auger screw 20 positioned directly below the hydraulic auger 13 lowers the knob 15c to fit the lower end to the upper end of the first auger screw 20 'suspended from the casing 21. At the same time, they are connected by a pin. After coupling, knob part 1
5c is raised and added to remove from the upper end of the auger screw 20, the moving portion 15b is retracted to return to the standby position, and the hydraulic auger 13 is lowered to add the upper end of the auger screw 20 to the speed reducer 13a. After this mounting, the support rod 22 is removed, and the hydraulic auger 13 is lowered to perform the second excavation. That is, the excavation operation is restarted by the hydraulic auger 13 after the extension auger screw 20 is connected to form one long auger screw.

The hydraulic auger 13 is used for the second excavation operation.
When it reaches the lower end of the leader body 8, the excavation is interrupted again, the speed reducer 13a is removed from the upper end of the auger screw 20, and the hydraulic auger 13 is raised to stand by at the original position. The top end of the topping auger screw 20 detached from the speed reducer 13a is suspended from the casing 21 via the support rod 22, and the third topping auger supplied by the screw moving device 15 as described above. After the screws are connected, the third excavation work is continued by the hydraulic auger 13. In this manner, the replenishing auger screw 20 stored in the rear part of the leader body 8 is supplied, and the excavation operation is repeated until the replenishment auger screw 20 reaches a predetermined depth while being sequentially connected and replenished. The state of the excavation work is shown in FIG.

After the excavation work, the long auger screw is lifted and separated in order from the top, and the screw moving device 1
5 to the auger holder moving device 16,
It can be sequentially stored in the rear part of the reader main body 8 in the state of standing on the holder 18c of the lateral moving device 18.

In the low aerial head pile driving machine with detachable auger screw according to the present invention, since a long auger screw is not mounted from the beginning, the height of the leader body 8 is much smaller than the conventional one. Become. Therefore, even in the case of subway construction in a large city, even if there is a ground obstacle on the main road (for example, an expressway overpass, railway bridge, electric wire, communication line, etc.), horizontal movement can be easily performed and simple construction can be performed. Can be.

In addition, the base machine 1 can be smaller than before, so that it can be evacuated to a narrow permanent work zone with a road occupation width of two lanes, and a work space requiring less assembly and disassembly of the leader body is sufficient. It is convenient.

[0027]

As described above, according to the present invention,
It has the following excellent effects. Work in a narrow, work area that cannot be done with a large pile driver is possible. Since the machine height (leader length) is low (short), the pile driver can be easily assembled and dismantled. Horizontal movement can be facilitated by avoiding ground obstacles on the main road. Vertical adjustment of the reader body is easy. A plurality of additional auger screws are stored in the rear part of the leader body, and the selection and supply of necessary additional auger screws can be performed smoothly. Addition and removal of the auger screw can be easily performed.

[Brief description of the drawings]

FIG. 1 shows an auger screw detachable low-headed pile driver according to the present invention, wherein (a) is an overall view and (b) is a plan view of a main part.

FIG. 2 shows a hanging portion of a reader main body.
Is a schematic elevation view, and (b) is a schematic plan view.

FIG. 3 shows a lower end mounting portion of the reader main body.
Is a schematic elevation view, and (b) is a schematic plan view.

FIGS. 4A and 4B show a screw moving device, wherein FIG. 4A is a plan view of a main part, and FIG.

FIG. 5 shows an auger holder moving device.
Is a plan view, (b) is a schematic elevation view, and (c) is a side view.

FIG. 6 shows a roller moving device, (a) is an elevation view,
(B) is a side view.

FIG. 7 is a perspective view showing an upper end portion of a replenishing auger screw.

FIG. 8 is an explanatory diagram showing an excavation work state.

FIG. 9 is an external view showing a conventional pile driver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base machine 2 ... Arm 3 ... Hydraulic cylinder 4 ... Trunnion 5 ... Hydraulic winch for auger lifting / lowering 6 ... Auxiliary winch 7 ... Slide sheave 8 ... Leader body 9 ... Sheave 10 ... Catch hawk 11 ... First hydraulic cylinder 12 ... First Hydraulic cylinder 2 13 Hydraulic auger 14 Wire rope 15 Screw moving device 16 Auger holder moving device 17 Support member 18 Lateral moving device 19 Roller moving device 20 Addition auger screw 21 Casing 22 Support rod

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Noriaki Ikenaga, Inventor Yoshinaga Machinery, 4-3-1 Midori, Sumida-ku, Tokyo Yoshino Machinery Co., Ltd. (72) Inventor Tadashi, 4-3-4 Midori, Sumida-ku, Tokyo Yoshinaga Machinery Inside the corporation

Claims (3)

[Claims] 1. A leader body is suspended from a tip end of an arm of a base machine via a trunnion, and a lower end of the leader body is supported by a catch fork attached to a lower portion of the base machine. An auger screw detachable low headless pile driver, wherein a lower end portion of the leader body is moved back and forth and left and right by an associated extension mechanism to fix the leader body vertically. 2. An auger screw storage / supply unit is provided at the rear part of the leader body, and the storage / supply unit is a screw moving device for moving the auger screw forward and backward, and holds the auger screw in an upright state. The auger screw detachable low-headed pile driver according to claim 1, further comprising an auger holder moving device that can be moved left and right and / or back and forth. 3. The low aerial head pile driving machine according to claim 2, wherein the replenishing auger screw has a flange portion formed at an upper end thereof, and a fitting for connecting the flange portion to a lower portion thereof.