JPS6233818Y2 - - Google Patents

Description

[Detailed description of the invention] This invention prevents serious accidents caused by the auger steady rest falling onto the worker at the bottom of the leader during alignment work or earth removal work in the earth auger construction method or soil pile construction method. This invention relates to an auger steady rest and fall prevention device for preventing the fall of an auger.

In the earth auger construction method or soil pile construction method, safety measures are required to prevent the auger steady rest from falling onto workers who are performing alignment work or earth removal work below the leader due to operational errors or poor maintenance.

For this reason, conventionally, a protrusion is attached to the guide pipe of the leader with a port or the like so that it receives the impact load of the falling auger steady rest. However, the protrusions got in the way, limiting the descending length of the auger machine and limiting the depth of excavation. Therefore, when a deeper excavation depth was desired, workers had to manually remove the protrusion attached to the guide pipe. This removal work takes time and effort,
Because of the danger involved, the reality is that in order to increase the depth of excavation, work is carried out without a safety device to prevent the auger steady rest from falling.

Furthermore, the conventional means had the disadvantage that even if time and effort were taken to attach the protrusion, if the auger steady rest was accidentally dropped once, the leader supporting the protrusion would be damaged by the impact load.

The present invention solves the above-mentioned drawbacks, and allows the arm member that catches the auger steady rest to swing between a lower position of the auger steady rest and a position removed from the lower position of the auger steady rest. The purpose is to allow the arm member to move out of the way when the steady rest is lowered below the arm member, and furthermore, when the arm member catches a fallen auger steady rest,
The purpose is to prevent impact forces from acting on the leader.

Next, the present invention will be explained with reference to the drawings. Pile driver 1
A leader 2 is provided with a cylinder so as to be erectable, and an auger machine 3 is suspended from the upper end of the leader 2 by a wire 4, and the wire 4 can be raised and lowered by operating a winch from a driver's seat 5. Further, the auger machine 3 is provided with guide tubes 3a on the left and right side walls, and the guide tubes 3a are slidably inserted into a pair of left and right guide pipes 6 provided along the leader 2 to guide the up and down movement of the auger machine. be done. Note that the guide pipe 6 is attached to the leader 2 via a support plate 6a. The output shaft protruding from the lower part of the auger machine 3 is connected to the rod 7.
An auger 8 is connected to the lower end of the .

An auger steady rest 10 is suspended from the upper part of the leader 2 via a wire 9 so that it can be raised and lowered by a winch (not shown), and a pair of left and right bearings 11 provided at the rear of the auger steady rest 10 are attached to the left and right guide pipes 6 . mated to. Note that the bearing 11 provided on the auger steady rest is formed in a semi-cylindrical shape.
A through hole 12 is provided in the front part of the auger steady rest, and the rod 7 of the auger 8 passes through the through hole 12 so that the rod 7 is steady rested. Although the auger steady rest shown in FIG. 3 is provided with a plurality of through holes 12, this is because this is an embodiment in which there are a plurality of augers 8.

The arm member 13 for catching the falling auger steady rest 10 has a cylindrical portion 13a at its base fitted into the lower thin shaft portion of the guide pipe 6, and the arm member 1
A spring 14 is fitted under the cylindrical portion of the arm member 13.
is located approximately 2m above the ground. The lower part of the spring in the guide pipe 6 has the same diameter as the upper part, and the outer diameter of the cylindrical part 13a of the arm member and the spring 14 is the same as that of the guide pipe 6, so that the bearing 11 of the auger steady is fixed as described later. It is now possible to descend. The spring 14 is for damping the impact force caused by the fall of the auger steady rest 10, and a fluid damping device other than the spring may be used.

One end of the bar 15 is pivoted in the middle of the arm member 13,
The other end of the bar 15 is pivoted to one end of a bar 16 and to the tip of a cylinder 17. The other end of the bar 16 is pivoted to the support plate 6a of the guide pipe, and the base of the cylinder 17 is pivoted to a retaining plate 18 attached to the lower part of the leader 2. By expanding and contracting the cylinder 17, the arm member 13 is Swing the arm member 13 between the lower position of the auger steady rest (solid line in Figure 3) and the position removed from the lower position of the auger steady rotated by 90 degrees (double-dashed line in Figure 3). I can do it. In addition, the cylinder 17 and the bars 15, 16
Alternatively, the arm member 13 may be oscillated by driving a motor, and the oscillation device consisting of a cylinder connected to a bar, a motor, or the like is controlled by switching the hydraulic control device of the driver's seat 5.

The present invention is constructed as described above, and even if the auger steady rest 10 accidentally falls, it hits the arm member 13 and is cushioned by the spring 14, thereby preventing it from descending below the arm member.

Also, when increasing the excavation depth, use cylinder 1.
7 and removes the arm member 13 from the lower position of the auger steady rest, the auger steady rest can be guided by the guide pipe 6 and move below the arm member 13, thereby lowering the lower limit position of the auger machine. Large excavation depth can be obtained.

As described above, according to the present invention, even if the auger steady rest falls, it is prevented from falling by the arm member, making it possible to perform centering operations etc. safely at the lower part of the leader. Further, since the arm members are supported via a shock absorbing device, no large impact force is applied to the leader or the like, and the device will not be damaged. Furthermore, by operating the swinging device of the arm member, the lower limit position of the auger steady rest can be easily lowered, so that this device will not get in the way even when the excavation depth is large.

[Brief explanation of the drawing]

Figure 1 is a schematic side view of a pile driver equipped with the auger steady fall prevention device of the present invention, Figure 2 is an enlarged side view of the main parts of the auger steady fall prevention device, and Figure 3 is an auger steady fall prevention device. FIG. 3 is an enlarged plan view of the main parts of the prevention device. 2... Leader, 3... Auger machine, 6...
Guide pipe, 10...Auger steady rest, 11
... Bearing, 13 ... Arm member.

Claims (1)

[Scope of utility model registration request] The auger machine is suspended from the top of the leader of the pile driver so that it can be raised and lowered, and the lower part of the auger machine is connected to the auger via a rod, and a guide pipe is provided to guide the up and down movement of the auger machine along the leader. An auger steady rest whose elevation is guided by a guide pipe is provided so that it can be raised and lowered, the base of an arm member is fitted to the lower end of the guide pipe, and a swinging device for the arm member is provided at the bottom of the leader to allow the arm member to swing. An auger steady rest fall prevention device that is movable between a lower position of the stop and a position removed from the lower position of the auger steady rest.