JP7009037B2 - How to attach / detach the work equipment of the pile driver - Google Patents

Description

The present invention relates to a method for attaching and detaching a working device of a pile driver, and more particularly to a method of attaching and detaching a working device in a pile driver that employs a rack and pinion method as an ascending / descending method of the working device that moves up and down along a reader.

Generally, small pile drivers are designed so that they can be transported by simply laying down the leader. However, when there is a limit on the load capacity of the transport vehicle, a working device such as an auger is removed from the reader and transported separately (see, for example, Patent Document 1). Further, when the work of the pile driver is switched between burying a steel pipe and improving the ground, the leader member at the lowermost portion is attached and detached (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2017-166196 Japanese Unexamined Patent Publication No. 2016-98622

Since the pile driver described in Patent Document 1 employs a chain method as an elevating method for the work device, the work device can be attached to and detached from the leader by attaching and detaching the chains connected to the upper and lower parts of the work device. This can be done by attaching and detaching the guide pipe provided on the reader and the guide give provided on the working device. Therefore, when the work device is attached to the reader, the chain may be connected to the work device after assembling the guide give to the guide pipe.

On the other hand, in the case of a pile driver that adopts the rack and pinion method as the raising and lowering method of the work device, at the same time as assembling the guide give to the guide pipe, the pinion provided in the work device is bitten into the rack provided in the reader. Must match. Furthermore, since the pinion and the rack are sandwiched between the reader and the working device and are hidden, it is difficult to visually confirm the meshing state. Therefore, the working device for the reader in the rack and pinion method. The skill level of the worker was required to install the.

Further, the pile driver described in Patent Document 2 attaches / detaches the lowermost leader member by using a dedicated attachment / detachment jig, and the working device remains attached to the upper reader. Therefore, no particular consideration is given to the attachment / detachment of the work device.

Therefore, an object of the present invention is to provide a method for attaching and detaching a working device of a pile driver, which can easily attach and detach the working device in a pile driver that adopts a rack and pinion method as an ascending / descending method of the working device.

In order to achieve the above object, in the working device attachment / detachment method of the pile driving machine of the present invention, a pinion that is rotationally driven by a motor provided in the working device is provided in front of a reader erected at the front of the base machine. A rack pinion method is adopted in which the working device is raised and lowered along the leader by engaging with the rack, the leader is divided into an upper reader and a lower leader, and the lower end rear portion of the upper reader is in front of the base machine. The base is used in a method of attaching / detaching a working device in a pile driving machine in which a leader bracket provided in a portion is provided so as to be undulating in the front-rear direction and the lower end of the upper reader and the upper end of the lower leader are detachably formed by flange coupling. When removing the work device from the machine, the process of lowering the work device to the position of the lower reader with the axis of the reader oriented in the vertical direction and installing the work device on the ground, and the upper leader and the lower part. By performing the step of releasing the flange connection with the reader and the step of driving the motor of the working device in the ascending direction to lower the lower leader, the lower leader and the working device are integrated from the base machine. When the work device is attached to the base machine separately, the process of installing the lower leader axis in the state where the lower reader and the work device are integrated on the ground in the vertical direction and the process of installing the upper leader axis vertically. The process of moving the base machine in the direction to align the axis of the upper reader with the axis of the lower reader, and driving the motor of the work equipment in the downward direction to raise the lower leader to raise the lower surface of the flange of the upper reader. It is characterized in that the upper surface of the flange of the lower leader is brought into contact with the lower surface to join the two flanges.

According to the work device attachment / detachment method of the pile driver of the present invention, the lower leader and the upper leader can be connected / disconnected by moving the lower leader up and down by the raising / lowering operation for operating the motor of the work device. Can be attached to and detached from the base machine while being integrated with the lower reader.

It is a side view of the main part which shows the example of one form of the pile driver which removed from the base machine in the state which integrated the working apparatus with the lower reader by applying the method of this invention. It is a side view of the main part which shows the state which the upper leader and the lower leader are flange-bonded. It is a side view of the main part which shows the state which the lower reader which integrated the working apparatus is separated from the upper reader.

1 to 3 show an example of a pile driver to which the working device attachment / detachment method of the present invention can be applied. The pile driving machine shown in this embodiment is a pile driving machine that adopts a rack pinion method as an elevating method of a working device, and is a base machine 13 in which an upper swing body 12 is provided on an upper portion of a lower traveling body 11 so as to be swivelable. A front bracket 14 provided on the front portion of the upper swing body 12, a tilting cylinder 15 for tilting the front bracket 14 in the left-right direction, a reader 16 provided on the front bracket 14 so as to be undulating, and the reader. An undulating cylinder 17 that supports 16 from the rear of the upper swivel body 12, front jacks 18 provided on both sides of the front bracket 14, rear jacks 19 provided on both sides of the rear of the upper swivel body 12, and upper swivel. A winch 20 provided at the center of the body 12 and a working device 21 that moves up and down along the reader 16 are provided.

The reader 16 is formed by an upper reader 23 rotatably provided on the front bracket 14 by a support shaft 22 in the front-rear direction and a lower reader 24 detachably connected to the lower portion of the upper reader 23 by a flange connection. The upper leader 23 is configured to obtain a height according to the work content by connecting a plurality of leader members by flange coupling.

Further, in the center of the front surface of the reader 16, a rack 27 in which pinions 26 rotationally driven by a plurality of hydraulic motors 25 provided in the working device 21 are meshed on both sides is provided over the entire length, and both sides of the reader 16 are provided. At the front end portion, a pair of left and right guide rails 29 with which the guide give 28 provided on the working device 21 is slidably engaged are provided.

In a normal working state, as shown by a solid line in FIG. 2, the guide gib 28 is engaged with the guide rail 29 of the leader 16 in which the upper leader 23 and the lower leader 24 are flanged, and the working device 21 is spread over the entire length of the reader 16. The work device 21 is moved up and down and piled up by switching the path of the hydraulic oil supplied to the hydraulic motor 25 of the work device 21 and rotating the pinion 26 in the ascending or descending direction of the working device. Do the work.

When it is necessary to remove the work device 21 when transporting the pile driver after the work is completed, the work device 21 is separated from the base machine 13 in a state of being integrated with the lower reader 24 by the following procedure. First, the work device 21 is lowered from the position of the working state raised in front of the upper reader 23 shown by the solid line in FIG. 2 to the lowermost end of the lower reader 24 shown by the imaginary line in FIG. 2, and supported on the ground. The member 30 is installed, the lower portion of the work device 21 is placed, and the work device 21 is supported by the support member 30 in a working posture.

For the support member 30, it is possible to use rectangular timber (square lumber) having a height dimension corresponding to the distance between the lower surface of the work device 21 lowered to the lowermost end of the lower leader 24 and the ground, and it is necessary. Depending on the situation, square lumber and plate lumber can be used together. Further, the shape and position of the support member 30 and the number of uses are arbitrary, and can be appropriately set according to the shape of the lower surface of the working device 21. Further, although it is basic that the axis of the leader 16 is in a vertical state, the tilting cylinder 15 and the undulating cylinder 17 may be operated depending on the situation such as the ground, and the leader 16 may be in a slightly tilted state.

Next, with the working device 21 supported by the support member 30, all the bolts 31 connecting the flange 23a at the lowermost end of the upper reader 23 and the flange 24a at the upper end of the lower leader 24 are removed, and the upper leader 23 and the upper leader 23 are removed. After making the lower reader 24 separable, the pinion 26 of the working device 21 is operated in the ascending direction. As a result, the lower reader 24 is lowered with respect to the working device 21, and as shown in FIG. 3, the lower reader 24 equipped with the working device 21 is separated from the upper reader 23.

Then, by retracting the base machine 13 with the upper reader 23 attached, the working device 21 can be removed from the base machine 13 in a state of being integrated with the lower reader 24, as shown in FIG. After that, the base machine 13 can be brought into a transport state by the transport vehicle for the base machine by tilting the upper leader 23 backward, and the work device 21 integrated with the lower leader 24 is lifted by a crane and the support member 30 is used. Can be mounted on the loading platform of a transport vehicle for work equipment and transported.

On the other hand, when assembling the pile driving machine transported to the work site, as shown in FIG. 1, the axis is directed vertically above the lower leader 24 whose axis is directed vertically by the support member 30. The base machine 13 is run so that the upper leader 23 is located, and the tilted state of the upper leader 23 is adjusted so that the flange 23a of the upper leader 23 and the flange 24a of the lower leader 24 are parallel to each other so as to be in the state shown in FIG. do.

Then, by operating the pinion 26 in the downward direction, the lower leader 24 is raised, both flanges 23a and 24a are brought into contact with each other, bolts 30 are attached, and the upper leader 23 and the lower leader 24 are flange-coupled. The reader 16 can be put into a predetermined working state. At this time, since the working device 21 is integrated with the lower reader 24 and the pinions 26 are in a state of being meshed with the rack 27 of the lower reader 24, a plurality of pinions 26 are placed on both sides of the rack 27 as in the conventional case. The troublesome work of meshing becomes unnecessary, and the working device 21 can be put into a working state only by flange-connecting the upper leader 23 and the lower leader 24. As a result, the pile driver after transportation can be assembled in a short time, and the usage efficiency of the pile driver can be improved.

When the upper leader 23 and the lower leader 24 are provided with the bending connecting pin 32, the bending connecting pin 32 may be attached to and detached from the pin hole 33 at the same time as the attachment / detachment of the flange coupling bolt 31.

For the support of the work device integrated with the lower reader removed from the base machine, a dedicated support jig can be created and used, and various support members other than wood can be used. Since the square lumber used in the example can be easily handled by hand, it can be most preferably used at the work site.

11 ... lower traveling body, 12 ... upper swivel body, 13 ... base machine, 14 ... front bracket, 15 ... tilting cylinder, 16 ... leader, 17 ... undulating cylinder, 18 ... front jack, 19 ... rear jack, 20 ... winch, 21 ... Working equipment, 22 ... Support shaft, 23 ... Upper leader, 23a ... Flange, 24 ... Lower leader, 24a ... Flange, 25 ... Hydraulic motor, 26 ... Pinion, 27 ... Rack, 28 ... Guide give, 29 ... Guide rail, 30 ... Support member, 31 ... Bolt, 32 ... Bending connecting pin, 33 ... Pin hole

Claims (1)

A rack pinion system in which a pinion that is rotationally driven by a motor provided in a work device is engaged with a rack provided in front of a reader installed in front of a base machine to raise and lower the work device along the reader. The reader is divided into an upper reader and a lower reader, and the rear portion of the lower end portion of the upper reader is provided on a leader bracket provided at the front portion of the base machine so as to be undulating in the front-rear direction. In the method of attaching / detaching a working device in a pile driver in which the lower end and the upper end of the lower reader are detachably formed by flange coupling.
When removing the work device from the base machine, the process of lowering the work device to the position of the lower reader with the axis of the reader oriented in the vertical direction and installing the work device on the ground, and the upper reader By performing the step of releasing the flange coupling with the lower leader and the step of driving the motor of the working device in the ascending direction to lower the lower leader, the base is in a state where the lower reader and the working device are integrated. Separated from the machine
When attaching the work equipment to the base machine, the process of installing the lower reader with the axis of the lower reader integrated with the work equipment on the ground in the vertical direction and the axis of the upper leader in the vertical direction. The process of moving the base machine in the state of being in a state of matching the axis of the upper reader and the axis of the lower reader, and driving the motor of the work equipment in the downward direction to raise the lower leader, and lower the leader on the lower surface of the flange of the upper reader. A method of attaching and detaching a working device of a pile driving machine, which comprises a step of bringing the upper surfaces of the flanges into contact with each other and joining both flanges.

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