JPH0320339Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a gripping device for piles, etc. that can reliably grip various types of piles, sheet piles, H steel, etc. in a vibratory pile driving machine. be.

[Prior art and its problems] Conventionally, the gripping device in a vibratory pile driving machine has been a hydraulic chucking device or a chucking device that uses a fixed arm hanging down on the pile driving machine and a pivoting arm. and so on. While these are suitable for gripping plate-shaped objects such as sheet piles and H steel, they are virtually impossible to grip various types of piles, especially concrete piles. This is due to the problem of the gripping force required to securely grip the concrete pile without damaging it, and the lack of an appropriate gripping jig. In addition, the invention of the chucking cap for piles, for example,
There is No. 6451, but this is a grip with a tight grip between the pile and simply transmits rotational force, which is essentially different from the grip that the present invention aims at.

Other similar technical documents include a pile clamping device disclosed in Japanese Patent Application Laid-open No. 119031/1983, which consists of a pile clamping device body, a fixed clamping part provided on the pile clamping body, and a fixed clamping part provided on the pile clamping body. It is composed of a movable clamping part that faces the movable clamping part, and a lever and a cylinder that actuate the movable clamping part, and the movable clamping part swings by the operation of the lever, and the movable clamping part swings between it and the fixed clamping part.
It has a structure that holds the pile in place. Also, Jitsukō 37-15761
There is a pile driver gripping device named No. 1, and its gist is that a pair of leg rods are provided in a converging manner facing downward, and each slides in the vertical direction, and that the opposing inner surfaces of the two leg rods are attached to It is composed of a gripping body, a jack and a push rod that slide on the gripping body, and has a structure in which the sheet pile is held between the inner surfaces of the gripping body.

However, it is difficult to grip cylindrical concrete piles, other square piles, sheet piles, etc. with a substantially uniform gripping force using the movable movable clamping part or sliding gripping body of the prior art detailed above. be seen.
Although it can hold piles, sheet piles, etc. of a certain shape,
By replacing certain parts with the same gripping device, it is not possible to grip cylindrical concrete piles, irregularly shaped piles, multi-pile piles, or even sheet piles, which results in a lack of versatility.

[Means for solving the problem] Therefore, the present invention is capable of reliably and easily handling cylindrical concrete piles, irregularly shaped piles, square piles, sheet piles, etc. by attaching and detaching spacers to fixed and movable gripping arms. In order to be able to grip the concrete pile with a substantially uniform gripping force without damaging the concrete pile through the sliding transition of the movable gripping arm facing the fixed gripping arm, the vibrating type is used. A main body that has a mounting plate that can be detachably attached to the lower surface of the pile driver, and a bolt that is a spacer member that can grip cylindrical concrete piles, square piles, irregularly shaped piles, sheet piles, etc., vertically installed on the lower surface of one side of this main body. a substantially half-cylindrical fixed gripping arm having a large number of screw holes into which the fixed gripping arm is screwed; a movable gripping arm having a substantially half-cylindrical shape, which is inserted between a tongue parallel to the lower surface of the other side provided on the installation part, and has a number of threaded holes into which bolts of the spacer member are screwed; It is an object of the present invention to provide a gripping device for a pile, etc. of a vibratory pile puncher, which comprises a cylinder and a link disposed on the main body that controls the sliding movement of a movable gripping arm.

[Example] Hereinafter, an example of the present invention will be specifically described based on the drawings.

Reference numeral 1 denotes a main body that has a mounting plate 3 with a large number of through holes 2 on the upper side and has a substantially deep-drawn shape when viewed from the side. A fixed gripping arm 5 having a substantially half-cylindrical shape and having a screw hole 4 is provided vertically. Further, a tongue side 6 parallel to the lower surface of the main body 1 is provided on the other side lower surface of the main body 1 (the left side lower surface in the drawing) through an extended portion 1a. A movable gripping arm 7 having the same configuration as the fixed gripping arm 5 is inserted between the lower side surface and the fixed gripping arm 5. Then this movable gripping arm 7
is a dog-shaped link 10 whose one end is pivotally connected to the piston rod 8a of the cylinder 8 disposed in the main body 1;
As the piston rod 8a advances and retreats, the link 10 swings about the pivot 11, and the movable gripping arm 7 moves between the upper surface of the tongue 6 and the lower surface of the main body 1. It is configured to slide horizontally along the tongue side 6 (hereinafter simply referred to as sliding transition) (of course, this applies when the main body 1 is held horizontally). In the figure, 13 is a movable grip. A bracket 14 provided on the arm 7 is a known vibratory pile driver. Note that spacer members are attached to the fixed and movable gripping arms 5 and 7 as necessary. For example, as shown by the dashed line in FIG. A square peg can be gripped by attaching it to the fixed and movable gripping arms 5 and 7, and as shown in FIGS. For example, by attaching several pieces, it is possible to handle piles of various sizes, and furthermore, by replacing and attaching other spacer members (not shown), it becomes possible to grip sheet piles, H-steel, etc.

[Function] Next, to explain the operating state of the present invention, the mounting plate 3 of the main body 1 is brought into contact with the lower surface of the pile driver 14, and the through hole 2 is
The bolt 20 is screwed in through the bolt 20 to secure the main body 1 to the pile punching machine 14 as shown in FIG. In this case, the piston rod 8a of the cylinder 8 is at its retraction limit, and the link 10 connected thereto is also in an upright state. Therefore, the movable gripping arm 7 is at its retraction limit, and the gap B formed between it and the fixed gripping arm 5 is at its maximum. In this state, the pile driver 14 and the main body 1
is hung by a crane, and the main body 1 is placed over the head of the pile 2, and the gripping arms 5, 7 are fixed and movable at the tip of the pile 21.
When the cylinder 8 is operated, the piston rod 8a moves forward one by one, and at the same time, the link 10 swings about the pivot 11, and the tip of the link 10 sequentially presses the movable gripping arm 7. As a result, the movable gripping arm 7 moves forward on the tongue side 6 as shown in FIG. 3, and the fixed and movable gripping arms 5 and 7 grip the tip of the stake 21. Therefore, the pile 21 is suspended from the pile punching machine 14. The subsequent pile driving or pile removal work is the same as before. Once the piling work etc. is completed,
By retracting the movable gripping arm 7 in the reverse operation described above and releasing its grip, the main body 1 and the pile puncher 14 become free from the tip of the pile 21.

[Effects of the invention] As detailed above, the invention provides a fixed gripping arm and a movable gripping arm on the lower surface of the main body having a mounting plate,
Since both gripping arms are configured to grip a stake, etc.,
This is extremely convenient as it makes it possible to chuck concrete piles, which was considered difficult in the past, and since the movable gripping arm slides, it has the effect of gripping piles, etc. with a substantially uniform gripping force. In addition, screw holes for mounting the spacer member are provided on the fixed and movable gripping arms, so it is possible to adjust the size of the pile diameter, irregularly shaped piles, sheet piles, etc. by changing the spacer member as desired, which is very useful. Furthermore, if the movable gripping arm is pressed and moved at the tip of the link, the sliding movement of the movable gripping arm is smooth, and this has practical effects such as helping to simplify and reduce the weight of the mechanism.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a partially cutaway bottom view, FIG. 3 is a sectional view showing a chucking state, and FIG. 4 is an example of a spacer member. FIG. 5 is a plan view showing the state in which FIG. 4 is used. 1... Main body, 3... Mounting plate, 4... Screw hole, 5...
... fixed gripping arm, 6 ... tongue side, 7 ... movable gripping arm,
10...Link, 13...Bracket, 14...
Pile punching machine, 15, 15', 17... Spacer member, 16, 20... Bolt, 21... Pile.

Claims (1)

[Scope of Claim for Utility Model Registration] A main body having a mounting plate that is detachably attached to the lower surface of a vibratory pile driver, and a spacer member 15, 1 vertically installed on the lower surface of one side of this main body.
A fixed gripping arm 5 having a substantially half-cylindrical shape and having a large number of screw holes into which bolts 16 and 20 of 5' and 17 are screwed.
and a tongue side 6 parallel to the lower surface of the other side, which is provided in correspondence with the fixed gripping arm 5 and is provided in an extension portion extending from the lower surface of the other side of the main body. A movable gripping arm 7 having a substantially half-cylindrical shape having a large number of threaded holes into which bolts of a spacer member inserted are screwed, and a link provided on the main body that controls the sliding movement of this movable gripping arm 7. 10 and a cylinder 8. The device for gripping piles, etc. of a vibratory pile driver according to claim 1, wherein the tip of the link presses the rear surface of the movable gripping arm when the movable gripping arm moves forward.