JPS60164513A - Pile penetrating and drawing-up machine - Google Patents

Abstract

PURPOSE:To prevent the lowering of the function of an elevator by a method in which the action center of the elevator provided on the side of a guide frame is positioned behind the cross-sectional center of a pile to be driven and also between the cross-sectional center and the coupling position with the existing pile. CONSTITUTION:The existing pile 21 is clamped with a reaction grasper 35, a pile 36 to be driven is grasped by the device 35, and a guide frame 29 is inclined to a proper angle by operating a cylinder 34. At this time, the center of a pin 25 and the action center of an elevating cylinder 27 are positioned behind the cross- sectional center of the pile 36 and also between the cross-sectional center and the coupling position A with the pile 21. The pile 36 is chucked by a pile grasper 31 and penetrated into the ground by operating an elevating cylinder 27. The application of an inclining moment such as strong loads to act on between the sliding portion of the elevator 30 and the guide frame 29 can thus be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-propelled static load type pile press-in/extraction machine, and more particularly to a device that eliminates the influence of tilting moment applied to steel sheet piles during pile press-in.

Conventionally, a self-propelled static load type pile press-in/extraction machine has an existing pile clamp 2 below a base 1 that is placed on an existing desk, and a guide frame above the base 1, as shown in Figures 1 and 2. 3 is erected and is attached to the side of the guide frame 3 so as to be able to rise and fall freely; a cylinder 6 that raises and lowers the lift body 5; and a pivotable pile gripping device that is equipped on the lift body 5. 7 is provided and is configured to press in or pull out the steel sheet pile 8. For devices like the one above.

The cylinder 6 is normally arranged close to the guide frame 3.

However, the position where the resistance force G of the steel sheet pile 8 occurs during press-in work generally changes depending on the soil quality and the press-in depth of the steel sheet pile 8, but the position between the cross-sectional center O of the steel sheet pile 8 and the cross-sectional center and the existing pile 9 It is customary to be between the meshing positions 10 and 10. In this case, the action center line 6a of the cylinder 6 is deviated from the position of the resistance force G by a distance As a result, an extra load is applied between the sliding portion of the elevating body 5 and the guide frame 3.

As a result, the sliding parts are subject to severe wear, and a resistance force due to friction is generated, reducing the ability of the elevating device, and the guide frame 3 is also required to have strong rigidity.

On the other hand, the above-mentioned resistance force acts as a reaction force moment M that tilts the pile press-in/extraction machine body backward using the existing pile clamped by the existing pile clamp 2 as a reaction force pile gripping device below the base 1 as a fulcrum. Even if the pile press-in operation is started after the frame 3 is set vertically, the pile to be worked on will naturally tend to tilt backward as the frame 3 is press-fitted. In order to deal with the above problem, as shown in FIG.
A device has also been considered in which the guide frame 3 is tilted freely around the fulcrum 13, and the guide frame 3 is tilted forward in advance before the pile is press-fitted during work, but this would be mechanically complex and cause the ups and downs. There is a problem in that a powerful device is required as the cylinder 12 for use, and it is difficult to completely eliminate the misalignment between the center line of action of the cylinder 6 and the press-in position of the steel sheet pile.

The object of the present invention is to obtain a device that eliminates the various drawbacks of the conventional self-propelled static load type pile press-in/extraction machine as described above. A support arm with one end pivotally supported is provided on a base that is equipped with a support arm and is placed on an existing pile, and a guide frame that tilts integrally with the support arm is provided, and a guide frame is provided on the side of the guide frame. a lifting body and a pile gripping device interlocked with the lifting body, such that the center of action of the lifting body is located behind the cross-sectional center position of the pile to be worked and between the engagement position with the existing pile. The main objective is to obtain a pile press-in/extraction machine that is characterized by being installed in the pile.

The present invention will be described in detail below with reference to the drawings.

That is, in Figures 4 to 6, 21 is the existing pile;
A table 23 that can be slid left and right is provided on the top of the base 22 that is placed on these existing piles, and a support arm 24 is also provided.
are integrally provided.

A rotatable bearing portion is formed at the front portion of the support arm 24 with a pin 25 interposed therebetween, and the pin 25 is pivotally attached to one end of a bracket 26 . Therefore, the lower end of the rod 28 of the lifting cylinder 27 is fixed at right angles to the pin 25, and the rod 28 is fixed at right angles to the pin 25.
The bearing portion of the support arm 24 is rotatably fitted into the pin 25 so as to sandwich the pin 8 between the bearings. With the above configuration, the bracket 26, the guide frame 29 and the lifting cylinder 2
7. The elevating body 30 and the pile gripping device 31 rotate integrally around the pin 25 while always maintaining a constant positional relationship. 32
is a stopper formed on the top of the bracket 26, which comes into contact with the upper part of the support arm 24 and acts as a stopper when the guide frame 29 is tilted backward by a certain angle or more. In addition, the bracket 1- provided at the end of the table 23
A cylinder 34 is attached to 33, and the cylinder 34
The other end is fixed to the guide frame 29.

The operation mode of the device of the present invention having the above configuration is as follows. After firmly clamping the existing pile 21 to the reaction force gripping device 35, the pile to be worked 36 is gripped by the pile gripping device 31, and the cylinder 34 is operated to tilt the guide frame 29 at an appropriate angle. At this time, the center of the pin 25 and the center of action of the lifting cylinder 27 are arranged so as to be behind the center of the cross section of the pile 36 to be worked and between the meshing position A with the existing pile 21. . In this state, the pile to be worked 36 is chucked by the pile gripping device 31 and the lifting cylinder 27 is operated to start press-fitting work. At this time, the center of action of the lifting cylinder 27 Because it is within the moving range of

The resisting force acts to pull up the pin 25, and no tilting moment M that would cause a strong load to act between the sliding portion of the elevating body 30 and the guide frame 29 does not act. In addition, the part of the support arm 24 that is integrally formed with the table 23, into which the pin 25 is rotatably fitted, becomes the main part that supports the resistance force, thereby lowering the center of gravity of the entire device. The state is obtained. Further, since the weight of the guide frame 29 is supported by the pin 25, a strong cylinder 34 is not required. On the other hand, even if an abnormal resistance force is generated during the pile press-fitting operation and a force that causes the guide frame 29 to fall backward is applied, the stopper 32 works to absorb this force. Further, in recent years, attachments have been diversified and piles to be worked have become larger, but in the present invention, since the lifting cylinder 27 is attached to the side of the lifting body 30, as the lifting cylinder 27, A more powerful device can be employed and the various demands mentioned above can be fully met. There is also an advantage that related accessories provided on the lifting cylinder 27 can be attached with compatibility.

FIG. 7 shows another example of the operation of the pile press-in/extraction machine according to the present invention, in which the main body is moved by holding the pile 36 to be worked, without lifting and moving the main body using another machine such as a crane. The reaction force gripping device 35 is placed on the adjacent existing pile by being raised and the base 22 is moved, and the device body can be moved by itself by being clamped.

Incidentally, in the description of the above embodiment, the manner in which the pile is press-in has been explained, but it goes without saying that the operation in the case of pulling out the pile can be performed in the same manner.

As explained above, the pile press-in/extraction machine according to the present invention is provided with a guide frame that tilts integrally with a support arm whose one end is pivotally supported on a base, and the center of action of the elevating body provided on the side of this guide frame is This is because it is located behind the cross-sectional center position of the pile to be worked and between the position where it engages with the existing pile.

There is almost no deviation in the resistance force between the action center line of the cylinder and the existing pile, and it is possible to prevent the generation of a tilting moment acting on the guide frame when the pile is press-fitted. Therefore, the ability of the elevating device can be maximized, friction during elevating and lowering can be minimized, and excess load can be prevented from acting between the sliding portion and the guide frame. Therefore, it is not necessary to install an unnecessarily powerful device as a lifting cylinder, and the configuration of the device is relatively simple, which has the effect of not increasing costs and makes it suitable for self-propelled pile press-in and pull-out machines. It is extremely useful in application.

[Brief explanation of drawings]

Figure 1 is a side view showing the configuration of a conventional pile press-in/extraction machine;
3 is an open plan view, FIG. 3 is a side view showing an improved version of the conventional device, FIG. 4 is a side view showing the structure of the pile press-in/extraction machine according to the present invention, FIG. 5 is the same plan view, and FIG. 7 is a front view of the same, and FIG. 7 is a side view showing another example of the operation of the present invention. 21... Existing pile 22... Base 23... Tifur 24... Support arm 25... Pin 26... Bracket 27... Lifting cylinder 29... Guide frame 11
30... Lifting body 31... Pile gripping device 32... Stopper 34... Cylinder 36... Worked pile Patent applicant Tosa Kikai Kogyo Co., Ltd. Figure 2 6 Figure 1 Figure 3 Figure 7 Figure 5 Figure 6

Claims (1)

[Claims] A support arm with one end pivoted is provided on a base that is equipped with a reaction force gripping device below and is placed on an existing pile, and a guide frame that tilts integrally with the support arm is provided. It is equipped with an elevating body provided on the side and a pile gripping device that interlocks with the elevating body, and the center of action of the elevating body is behind the cross-sectional center position of the pile to be worked and is at the meshing position with the existing pile. A pile press-in/extraction machine characterized by being arranged so as to be located between the piles.