JPS5849242Y2 - Leader rotation device in a suspended type rotating two-sided leader pile driver - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a leader rotation device in a suspended pile driver, in which a rotating two-sided creeder, which is equipped with an auger screw on one side of the leader mast and a monkey bars on the other side, is suspended from a boom.

Conventionally, in this type of pile driving machine, in order to alternately perform vertical hole drilling with one auger screw and root anchoring with the other screw, it was necessary to rotate the leader mast and change the positions of the screw rod and the screw rod. First, the leader mast is lifted slightly, and then the worker holds the leader mast in his/her hand and rotates it manually, but the scaffolding for the work is poor, and the scaffolding, especially after excavating a vertical hole, requires a lot of work. It had the drawbacks of being dangerous and having extremely low work efficiency.

In order to improve this problem, it was considered to use mechanical means such as rotating the leader with a hydraulic motor found in the three-point support type pile driving machine of Japan, but other mechanisms such as a mechanism to receive the rotational reaction force of the leader and other methods were considered. This required a large-scale mechanism, which resulted in a fatal flaw for this type of device, which is desired to be lightweight.

The present invention provides a leader rotation device for a suspended rotary dual-plane leader pile driver that is simple in structure, lightweight, and has high work efficiency.The details will be explained below with reference to the drawings.

In FIG. 1, a telescopic boom 3 as a leader support member is mounted on a swivel base 2 of a truck 1 as a base body so as to be able to rise and fall freely, and the upper end of a leader mast 5 is connected to a top sheave block 4 of the boom 3. 7 and the top sheave block 6 of the leader mast, the motor is connected to the guide rails 8, 8 provided on one side of the leader mast 5, so as to be able to swing back and forth in a vertical plane and to rotate about the axis of the leader mast. and another guide rail that slidably engages a drive device 9 consisting of a speed reducer, connects an auger screw 10 to the output shaft of the drive device 9 and hangs down, and is provided on the other side of the leader mast. Monken 12 on 11,11
are slidably engaged with each other, and these drive devices 9 and Monken 1
2, a wire 13 hanging from the top sheave block 6,
14 are connected to each other.

First, the connection structure of the leader mast 5 to the boom 3 will be described in detail.

2 and 3, a shaft 15 is rotatably passed through the front end of the top sheave block 4 of the boom 3 with the shaft 15 oriented horizontally;
Both ends of the shaft 15 are supported at the upper end of the connecting block 7, so that the connecting block 7 can swing back and forth in a vertical plane relative to the upper end of the boom 3.

Next, a bearing portion 16 is provided at the lower center of the connecting block 7, and the top sheave block 6 of the retar mast 5 is
A hollow shaft 1 communicating with the inside of the block 6 is provided at the center of the upper surface of the block 6.
7 is provided protrudingly on the axial extension line of the leader mast 5, and this hollow shaft 17 is inserted into the bearing portion 16 with a bearing 18.
, 18, so that the leader mast 5 can rotate about the axis of the leader mast 5 with respect to the upper end of the boom 3 via the connecting block 7.

The wire 13 connected to the drive device 9 is hung on the auger suspension sheaves 19, 20, 21 supported at one end inside the top sheave block 6, and
The wires 14 connected to the top sheave block 6 are hung on the sheave 22 for lifting the sheave 22 supported at the other end within the top sheave block 6, and these wires 13 and 14 are connected to the guide sheave 22 supported at the center of the top sheave block 6. Guide sheaves 25, 2 are guided through the sheaves 23, 24 through the hollow shaft 17 into the connecting block 7, and are supported therein.
6. The boom is then connected to a winch (not shown) on the swivel base 2 via sheaves 27 and 28 supported by the top sheave block 4 of the boom and other sheaves.

Note that a seat plate 29 is attached to the lower end of the leader mast 5 via bearings 30 and 31 as shown in the fourth figure.
It is mounted so that it can rotate about its axis, and is grounded by the seat plate.

Next, the leader mast rotation drive mechanism will be explained.

In FIGS. 4 and 5, arms 32, 32' of appropriate lengths are provided on both left and right sides of the lower end of the leader mast 5, projecting in the diametrical direction, and guide sheaves 33, 33' and locking pins are attached to each arm. 34, 34', and the other guide sheaves 35... are attached to the guide rails 8, 8, 11, 11 on the cross section passing through the guide sheaves 33, 33'.
In addition, another guide sheave 36 is attached to the front end of the truck 1 at the same height as the guide sheave 33, etc., so that it can rotate freely, and as shown in the third figure, the leader mast 5
A pin 39 is attached to a bracket 37 protruding from one side of the upper end so that a swing arm 38 of an appropriate length can be swinged on a horizontal plane.
39, a sheave 40 is attached to the arm 38, and the leader rotation driving wire 41 hanging down from the sheave 40 is guided forward through the guide sheave 36, and then in FIG. The wire is wound around to the right through the guide sheaves 33, 35, and 35, and the hook 42 at the tip of the wire is locked to the locking pin 34'.

The other end of the wire 41 passes through the sheave 40 and passes through the hole 43 of the swing arm 38 and the hole 4 of the leader mast as shown in the third figure.
4 into the leader mast 5, through guide sheaves 45 and 46 supported within the leader mast 5, into the top sheave block 6 through a hole 47 as shown in the second figure, and then into the top sheave block 6 from the offshore shaft 17. The winch 5 on the swivel base 2 passes through the guide sheave 48 in the connecting block 7, the guide sheave 49 in the boom top sheave block 4, and other sheaves.
6.

Reference numeral 50 denotes a lock pin for fixing the leader mast provided on both left and right sides of the connecting block 7. As shown in the second figure, the lock pin 50 is supported in a cylinder 51 fixed to the side surface of the connecting block 7, and is always pushed downward by a spring 52. It is resiliently engaged with a locking hole 53 formed on the upper surface of the top sheave block 6, but is disengaged from the locking hole 53 by pulling the wire 54.

In this example, locking holes 53, 53 are provided at the front and rear of the upper surface of the top sheave block 6, and locking holes 53', 53' are further provided on the left and right sides as shown in the third figure.

Note that the operating wires 54, 54 are preferably led to the driver's seat of the swivel base 2.

The operation of this device will be explained below.

The auger screw 10 is positioned at the front as shown in the first figure, and the leader rotation drive wire 4 is positioned as shown in the fifth figure.
With the first hook 42 locked on the locking pin 34', the auger screw 10 rotates to drill a vertical hole in the ground.

After excavation, the auger screw 10 is pulled up to the ground, and then the rieta rotation drive wire 41 is gradually wound up.The leader mast 5 is pulled by the wire and rotates about the mast axis in the first position while suspending the auger screw 10 and the monkey bars 12.
, Figure 5 rotates clockwise.

During this rotation, the leader mast 5 is rotatably supported at its upper end by the bearing portion 16 of the connecting block 7 and at its lower end by the seat plate 29, and rotates smoothly.

When the leader mast 5 rotates approximately 90 degrees, the winding of the wire 41 is temporarily stopped.

At this point, since the auger screw 10 and the alignment screw 12 have been moved to positions shifted from the vertical hole excavated in the previous operation, a pile is lifted by another crane and inserted into the vertical hole.

After inserting the pile, the leader rotation wire 41 is wound up again to further rotate the leader mast by 90 degrees, and the control rod 12 is positioned above the pile.

Therefore, the upper end of the pile is hit with Monken 12 to secure it.

After fixing, remove the hook 42 of the leader rotation wire 41 from the locking pin 34', then rotate the wire 41 from the right side of the leader mast 5 through the front side to the left side in the opposite direction to the above, and then attach the hook 42 to the locking pin 34'. 34', and in this state, the wire 41 is wound up and the leader mast 5 is rotated 180 degrees counterclockwise in the opposite direction to the above, to return to the original state shown in FIG.

Although the other locking pin 34 is not necessary according to the above leader rotation operation after fixing, in some cases, the wire 4 after fixing
1 from the left side of the leader mast 5 through the front side to the right side, its hook 42 is locked to the other locking pin 34, and the leader mast 5 can be rotated 180 degrees clockwise and returned to its original position.

When the leader mast 5 is rotated 90 degrees in the above operation and 1
When rotating 80 degrees, lock pins 50, 50 are inserted into locking holes 53, 5.
3 or 53', 53' to lock the leader mast 5 unrotatably.

Note that the leader rotation wire 41 can be separated from the guide sheave 36 at an appropriate upper position using a removable connecting fitting 55 such as a hook and a ring.

In the present invention, the other end of the leader rotation drive wire 41 is connected from the guide sheave 36 to the winch on the swivel base 2 via a guide sheave attached to a suitable position on the boom 3, or directly from the guide sheave 36 to the winch on the swivel base 2. You can also do that.

According to the leader rotation device of the suspended type rotary two-sided leader pile driver of this invention, the leader mast can be rotated to a desired angle by a simple structure of winding the leader rotation drive wire and a lightweight mechanism. It is possible to freely rotate the auger screw to a desired excavation position, the mower to a desired root anchoring position, and the auger screw and mower to positions that do not interfere with the work of inserting piles into a vertical hole. As a result, it is possible to eliminate the dangers associated with manual labor and improve work efficiency.

[Brief explanation of the drawing]

The drawings show an example of the present invention, and Figure 1 is a side view of the pile driver;
Figure 2 is an enlarged longitudinal sectional front view of the upper end of the leader mast;
The figure is an enlarged partially cutaway front view of the upper end of the leader mast in the state shown in Fig. 1, Fig. 4 is an enlarged partially longitudinal side view of the lower end of the leader mast, and Fig. 5 is an enlarged sectional view taken along the line V-V in Fig. 1. ,
FIG. 6 is a sectional view taken along line VI-VI in FIG. 1...Truck, 3...Boom, 5.
... Leader mast, 10 ... Auger screw, 12 ... Monken, 29 ...
Seat plate, 34, 34'... Locking pin, 35...
... Guide sheave, 41 ... Leader rotation drive wire, 56 ... Winch.

Claims (1)

[Claims for Utility Model Registration] At the front of the base body, a leader mast equipped with an auger screw on one side and a Monken on the other side can swing in a vertical plane and rotate about the axis of the leader mast. The upper end of the mast is connected to and suspended from a boom that stands up from the base body, and is grounded via a seat plate rotatably attached to the lower end of the leader mast, with a locking pin protruding from the outer circumferential surface of the leader mast. and a suspended rotating two-sided leader pile, in which a leader rotation drive wire, one end of which is removably locked to the locking pin, is guided rearward around the outer periphery of the leader mast and connected to the winch on the base body. Leader rotation device in a beating machine.