JPH06193062A - Press-in pile driving and drawing machine - Google Patents

Abstract

PURPOSE:To prevent the displacement of a press-in pile driving and drawing machine including the inclination thereof at the time of pressing in and drawing a pile, and ensure a smooth pressing in and drawing operation for the pile. CONSTITUTION:A press-in pile driving and drawing machine 1 works to press and draw a pile PO into and from a subsoil through the elevation of a chuck 3, using a reaction force from existing piles P. A clinometer 11 detects the inclination angle of a mast 6 and a distance sensor 12 detects a distance between a saddle 4 and a subsoil. Then, all detected values are sent to a controller 15. Also, a pressure sensor 13 detects a pressing or drawing force for a pile, and sends the detected value to the controller 15. This controller 15 controls the operation of the chuck 3 on the basis of the entered detection values, and the displacement of the mast 6 is thereby prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile press-fitting / pulling machine for press-fitting or pulling-out a pile while moving it on an existing pile.

[0002]

2. Description of the Related Art A pile press-in / pull-out machine is provided with a clamp for holding an existing pile, and a chuck for lifting or lowering the pile while sandwiching the pile to press-in or pull out the pile. At the time of press-fitting or pulling-out of the pile, the existing pile sandwiched by the clamps is used as the reaction force, and when this reaction force is larger than the press-in force or pull-out force of the pile, the smooth press-fitting or pulling-out of the pile can be performed. On the other hand, when the pressing force or the pulling force of the resistance becomes larger than the reaction force, the existing pile is lifted or sinked, and the posture of the pile press-in / pull-out machine is deteriorated. As a result, the pile falls forward when press-fitting, and the section resistance increases, making press-fitting impossible. Therefore, when press-fitting or pulling out the pile, it is necessary to adjust the press-fitting or pulling-out force to be smaller than the reaction force of the existing resistance. Conventionally, such adjustment has been performed manually by an operator while observing the press-fitting and pulling-out conditions of the pile.

[0003]

However, the adjustment of the pressure input or the withdrawal force by the operator relies heavily on experienced experience and intuition, and requires the operator to have a high level of skill. For this reason, it was difficult for a beginner to operate the pile press-in / pull-out machine, and automatic control was impossible. The present invention has been made in consideration of the above circumstances, and by automating the adjustment of the press-in force or the pull-out force of the pile, it is possible to perform the press-in or pull-out without the need for the operator's high technology. The purpose is to provide a machine.

[0004]

In order to achieve the above object, a pile press-fitting / extracting machine of the present invention comprises a detecting means for detecting a displacement amount from a reference position of a main body on which a chuck is mounted so as to move up and down, and a counter pressure input. Alternatively, the measuring means for detecting the pulling force and the controlling means for controlling the operation of the chuck based on the detection values of the detecting means and the measuring means are provided.

[0005]

In the above structure, the detecting means is the displacement amount of the main body,
For example, the amount of inclination from the vertical line and the distance to the ground are detected, and the detected value is sent to the control means. Further, the measuring means detects the pressure input or pulling force of the pile and sends it to the control means. The control means stores a program for press-fitting and pulling-out operations of piles and a program for comparing each detected value, etc., so that the pressure input or pull-out force of the piles becomes smaller than the reaction force based on the input of the detected values. Control the operation of the chuck.
Therefore, the press-fitting and pulling-out of the pile can be automatically adjusted, and the skill of the operator is not required.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall structure of a pile press-fitting / pulling machine according to a first embodiment of the present invention. Since the press-fitting and pulling-out of the bolt are basically the same except that the operation of the chuck is reversed, only the press-fitting of the pile will be explained in the following description, the pulling-out of the pile is omitted, and the same applies. To do.

The anti-press-fitting / extracting machine 1 moves on the existing piles P press-fitted into the ground and press-fits new piles PO to construct a pile row. Therefore, the anti-press-fitting / extracting machine 1 has a plurality of existing piles P
Clamps 2 for sandwiching each of them and a new pile P
And a chuck 3 that holds O and moves up and down. The plurality of clamps 2 hang down from a saddle 4, and a slide base 5 that is relatively movable in the pile row direction by at least one pitch of the existing piles P is mounted on the saddle 4, and the mast is mounted on the slide base 5. 6 are erected. A guide rail 7 is provided in the vertical direction on the front side of the mast 6, and an elevating body 8 is slidably attached to the guide rail 7. The vertical movement of the lifting body 8 is performed by a main cylinder 9 which is driven by a fluid pressure, and a new anti-PO is press-fitted by attaching the chuck 3 to the lifting body 8. Here, the mast 6 and the saddle 4 constitute a main body to which the chuck 3 is attached so as to be vertically movable.

In addition to the above construction, a detecting means for detecting the amount of displacement of the main body composed of the mast 6 and the saddle 4 is provided. In this embodiment, this detecting means is the mast 6
It is composed of an inclinometer 11 for detecting the amount of inclination of the mast 6 and a distance sensor 12 such as an ultrasonic sensor for detecting the distance of the mast 6 or the saddle 4 from the ground. Inclinometer 11 is a mast 6
The mast 6 is attached to the mast 6 and detects the amount of inclination of the mast 6, that is, the inclination angle with respect to the vertical line. The distance sensors 12 are mounted on the lower surfaces of the front and rear ends of the saddle 4, and each distance sensor 12 detects the distance between the ground and the saddle 4. Reference numeral 13 is a pressure sensor attached to the main cylinder 9. This pressure sensor indirectly detects the pressure input to the chuck 3 by pressing the resistance by detecting the fluid pressure to the main cylinder 9, and constitutes a measuring means.

In the figure, reference numeral 15 is a controller for automatically controlling the entire operation of the anti-press-fitting / pulling machine 1. The controller 15 clamps and releases the existing piles P by the clamp 2, clamps and releases the piles PO of the chuck 3, and the chuck 3
Actuation of the main cylinder 9 for raising and lowering, the saddle 4
The relative slide movement of the slide base 5 and other operations are controlled, and the pile press-fitting is automated. Therefore, the controller 15 stores a program for controlling the above operation. Further, the information and commands from the external storage means such as an IC card are read, and the press-fitting operation of the pile and the moving operation on the existing resistance are changed based on these.

Such a controller 15 has an inclinometer 1
1, detection values from the distance sensor 12 and the pressure sensor 13 are input by wire or wirelessly. Based on this input, the controller 15 determines the state of the reaction force of the existing anti-P at the time of press-fitting, and controls the operation of the chuck 3, that is, the main cylinder 9 based on the determination result. Such control is basically performed so that the pressure input of the drag is smaller than the reaction force of the existing drag. For example, when the pressure input of the pile is larger than the reaction force of the existing pile due to hard ground or the like, the chuck 3 is controlled so as to descend in small steps, and the pressure input and the reaction force are adjusted.

Therefore, in this embodiment, since the pile is press-fitted while adjusting the press-fitting force of the pile and the reaction force of the existing resistance, the mast 6 and the saddle 4 do not tilt and a certain posture is maintained. However, the pile can be press-fitted in a certain direction, and excessive stress does not act, so that damage or failure does not occur. Further, since the postures of the mast 6 and the saddle 4 are maintained well, the sliding portion, for example, the sliding portion of the lifting body 8 with respect to the mast 6 operates smoothly, and the pile press-fitting / extracting machine as a whole operates well.

FIG. 2 shows a second embodiment of the present invention, in which the same elements as in the first embodiment are designated by the same reference numerals.
In this embodiment, a gyro device 17 is attached to the mast 6. The gyro device 17 observes the rotational movement of the inner piece magnetically or optically to determine the mast 6
The inclination angle θ with respect to the vertical line and the distance h to the ground are detected. That is, the gyro device 17 constitutes detection means for detecting the amount of displacement of the mast 6, and sends the detected tilt angle θ and distance h to the controller 15. Controller 15
Controls the press-fitting operation of the chuck 3 based on the detection value from the gyro device 17 and the detection value from the pressure sensor 13 on the main cylinder 9 side. Therefore, in the present embodiment, the same operation as in the first embodiment is performed, but since the detection means is constituted by the gyro device alone, there is an advantage that the structure is simple.

[0013]

According to the present invention, since the operation of the chuck is controlled by monitoring the press-fitting or pulling-out of the pile, it is possible to automatically perform the adjustment for keeping the posture of the press-fitting and pulling-out machine of the pile in a good state. Press-fitting or withdrawing can be performed smoothly.

[Brief description of drawings]

FIG. 1 is an overall side view of a first embodiment of the present invention.

FIG. 2 is an overall side view of the second embodiment.

[Explanation of symbols]

 1 Pile press-in / pull-out machine 2 Clamp 3 Chuck 4 Saddle 6 Mast 11 Inclinometer 12 Distance sensor 13 Pressure sensor 15 Controller

Claims (2)

[Claims] 1. A pile press-fitting / extracting machine in which a chuck moves up and down with respect to a main body to press-fit or pull-out a pile by using an existing resistance clamped by a clamp as a reaction force, from a reference position of the main body at the time of press-fitting or withdrawing the resistance. Detecting means for detecting the amount of displacement of the pile, measuring means for detecting the pressure input or withdrawal force, and control for controlling the operation of the chuck during the press-fitting or pulling-out of the pile based on the detection values of the detecting means and the measuring means. And a press-fitting and extracting machine for piles. 2. The anti-press-fitting / pulling-out machine according to claim 1, wherein the detecting means detects an amount of inclination of the main body with respect to a vertical line and a distance from the ground when the pile is press-fitted or pulled out.