JPH0321721A - Pile holding mechanism - Google Patents

Abstract

PURPOSE:To reduce the amount of displacement of a pile holding device by providing two sets of a pair of movable and stationary claws located so that they can hold each existing pile from both sides, and displacing the claws parallel to one side of each existing pile by each driving mechanism. CONSTITUTION:Two sets of a pair of holding claws consisting of mutually opposed movable and stationary claws 11, 12 located so that they can hold each existing pile from both sides, are installed on the slide frame 4 of a working device 1 on piles and on the lower part of a supporting frame. The movable and stationary claws 11, 12 are displaced parallel to one side of each existing pile by the action of each claw-displacing device to hold or release one side of each existing pile P. These claws are displaced neither in the direction perpendicular to the existing pile nor in the vertical direction to reduce the amount of displacement of the pile holding device, so that piling operation can be quickly performed, and thus operations at a narrow construction site can be easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pile clamping mechanism such as a clamp that is attached to a pile-up working device and clamps an existing pile.

(Prior art) Pile lifting equipment includes a pile press-in bow puller that continuously press-fits piles, a working machine equipped with a crane or the like to perform various tasks, and a moving device that transports piles and materials. The machine performs the specified work while moving over the rows of existing piles that have been continuously driven.

This pile working device is equipped with a plurality of pile holding mechanisms such as clamps and chucks, and the working device moves by itself on the pile while one of the pile holding mechanisms holds the existing pile and maintains its supporting force. The operation of the clamping claws of this pile clamping mechanism was performed as follows.

■Move left and right in a direction perpendicular to the driving direction of the existing pile row,
An operation that clamps one side of the existing pile perpendicular to this movement. For example, in the case of steel sheet piles, the web is clamped by moving orthogonally to the web.

■In addition to the left and right movement of Doki■, this operation also moves it up and down. For example, when the work equipment moves forward on a row of piles,
First, it will be moved away from the existing piles, and then it will rise.

After the working device moves forward, it descends again to clamp the existing pile. Such vertical movement prevents the clamping claw from colliding with the stake.

(Problem to be solved by the invention!) In the above operation (2), the amount of movement of the clamping claws for clamping and releasing is long, resulting in a long travel time, resulting in poor workability. Furthermore, a cylinder is used to move the clamping claws, but between the pair of clamping claws, the cylinder is located perpendicularly to the driving direction of the existing pile row, and is on the same axis. Therefore, the width of the device spreads in the width direction, resulting in an increase in the size of the device.

In addition to the above-mentioned problems, the operation described in (■) above requires a cylinder to move the clamping claws up and down, which complicates the structure and impairs operability and speed of work. . Furthermore, a space is required around the gripper to allow vertical movement of the gripper, making it difficult to operate when the upper space is narrow, such as under a bridge.

Therefore, in order to solve these problems in the prior art, it is an object of the present invention to provide a pile clamping mechanism in which clamping claws clamp existing piles through a new operation. (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes at least a pair of clamping claws disposed at the lower part of a pile-up working device so as to sandwich an existing pile, and the clamping claws. and a moving mechanism that moves the pile in a direction parallel to one side of the existing pile, and the pair of clamping claws grips one side of the existing pile from both sides by the operation of the moving mechanism.

Further, at least one of the pair of clamping claws may be configured to press the surface of one side of the existing pile in an orthogonal direction and clamp the pile with the other clamping claw.

(Operation) The moving mechanism moves the clamping claw in a direction parallel to one side of the existing pile, and the clamping claw clamps one side of the pile by this parallel movement. Therefore, the existing pile can be clamped without moving in the direction perpendicular to the existing pile or moving in the vertical direction.

In addition, by pressing the surface of one side of the existing pile in the orthogonal direction with one of the clamping claws, the supporting force of the existing pile is increased, and reliable clamping can be performed.

(Example) Embodiments of the present invention will be described below based on the drawings.

In each embodiment, the same elements are given the same reference numerals and redundant explanations will be omitted.

FIG. 1 shows a pile working device l to which a first embodiment of the present invention is applied. It is equipped with a main body frame 2 on which a crane, etc. can be attached, stakes and various tools are mounted, and support frames 3 installed at the front and rear of the main body frame 2, and 2,000 parts of the main body frame have a slide frame 4. is configured.

Two pairs of clamping claws each consisting of a movable claw l1 and a fixed claw 21 as shown in FIG. 2 are attached to the lower portions of the slide frame 4 and the support frame 3. The movable claw 11 and the fixed claw 21 clamp or release the existing pile P by their respective moving mechanisms.

With reference to FIGS. 2 and 3, these clamping claws 11, 2
↓ and the structure of its moving mechanisms 14 and 24 will be explained. The movable claw 11 and the fixed claw 21 are respectively attached to a movable claw support 10 and a fixed claw support 20 which are vertically disposed on the support frame 3 and the slide frame 4 of 2,000 parts of the main body frame. Each moving mechanism 1 is provided on the upper part of each of these supports 10 and 20.
4,24 are provided.

The moving mechanisms 14 and 24 are both cylinders ↓4a and 24.
a and the rods 14b and 24b, the cylinder 14-a is fixed inside the support 10 as shown in FIG. There is.

In addition, in FIG. 3, the cylinder 1 of the support body 10 of the movable claw l1
4a and rod ↓4b are shown, but the cylinder 24a and rod 24b of the support body 20 of the fixed claw 21 have a similar structure.

In this embodiment, as shown in FIG.
4-b and 24b are arranged parallel to the flange F.

Guide protrusions 15 and 25 are formed on both sides of the upper part of each support body 10 and 20 in parallel with the flange F, and guide grooves 5 in which these guide protrusions 15 and 25 slide are formed in the support frame 3 or slide frame 4. is formed.

Therefore, the movement of the movable claw support 10 and the fixed claw support 20 in the direction parallel to the flange F is performed stably and accurately.

Furthermore, the cylinder 12a of the pressing mechanism 12 is slidably attached within the movable claw support 10, and the movable claw l1 is attached to the tip of this cylinder 12a. Also,
One end of the rod 12b of the pressing mechanism 12 is fixed to the end surface of the movable claw support 10. This pressing mechanism 12 is attached so that the movable nail tool 1 is orthogonal to the flange F.

In this embodiment, two upper and lower movable claws l1 are attached, and the fixed claw 21 is oval-shaped so as to have a length that is the sum of these two upper and lower movable claws 11. Also, the movable claw 11
Both of the fixing claws 21 have a two-stage structure and can simultaneously clamp the flanges F of two connected existing piles.

Next, the operation of this embodiment and the moving operation of the pile working device 1 will be explained with reference to FIGS. 1 and 4. First, the cylinders 14a, 24a at the bottom of the support frame 3 are operated to extend the rods 14b, 24b. Then, the fixed claw support 20 and the movable claw support ↓O move toward the pile P in a direction parallel to the flange F of the pile P (in the direction of the arrow in FIG. 4(A)).

Next, when the suppression mechanism 12 is activated and the rod 12b is extended, the movable claw l1 moves forward, and as shown in FIG.
Existing pile P. P flange F. Hold F at the same time.

Next, after moving the slide frame 4 in the advancing direction (in the direction of the arrow in FIG. 1), the rods 14b and 24b are extended, and the fixed claw support 2
and the movable claw support 10 is slid parallel to the flange F of the existing pile P toward the pile. Furthermore, the pressing mechanism 12 is operated to press two adjacent existing piles P connected by the grip G in the same manner as described above. P flange F. F is held between the fixed claw 21 and the movable claw 11 (see FIG. 4(B)).

After this clamping, the cylinder 12a of the movable claw support 10 of the support frame 3 is operated in the opposite direction to retract the rod 12b, and then the moving mechanism 14 is operated to move both supports ↓0, 20.
is separated from the stake P, and the flange F of the fixed claw 21 and the movable claw 11 is
release the trapped state. After moving the main frame 1 and support frame 3 forward by one existing pile P in this state,
Cylinder ↓4a again. 24a to operate the rod 14b.
, 24b are extended, and the fixed pawl support 20 and the movable pawl support IO are respectively brought close to the flange F of the existing pile P and held therebetween.

By repeating the above operations, the existing pile P
The flange F can be moved on the existing pile row.

In this embodiment, the movable claw 11 and the fixed claw 21 are moved parallel to the flange F of the existing pile P to sandwich the flange F, so the amount of movement of the fixed claw 11 and the movable claw 2t is small, and workability is improved. Furthermore, the cylinders {4, 24 for moving the fixed claw 11 and the movable claw 21 are also arranged in parallel with the flange F, and do not need to be arranged on the same axis, so the device can be downsized and its operating pressure can be reduced. can be used effectively.

Further, since there is no need to move the fixed claw 11 and the movable claw 21 in the vertical direction, the structure is simplified and the construction can be operated satisfactorily even at a construction site where the upper space is narrow. Furthermore, in this embodiment, the suppressing mechanism 12 is activated to press the surface of the flange F in the vertical direction with the movable claw 1↓, and the two piles are simultaneously clamped, so that the support becomes more reliable.

FIG. 5 shows a second embodiment of the invention. In this embodiment, three pairs of movable claws 11 and three pairs of fixed claws 2l are provided on the support frame 3 or the slide frame 4. A suppression mechanism 12 that moves the movable claw 1↓ in the direction of the flange F of the existing pile P is attached to the movable claw support 10, but since the operating distance of this suppression mechanism 12 is relatively short, such a three-pair arrangement is not possible. It becomes possible to set up By arranging these three pairs, the supporting force on the existing pile P increases and the supporting range becomes longer, so that stable supporting is possible.

FIGS. 6(A) to 6(D) show the operating sequence in this embodiment. The operations of the movable claw 1 and the fixed claw 21 are the same as in the previous embodiment, but in this embodiment, when moving on the existing pile row, the movement of the movable claw 1 and the fixed claw 21 is similar to that of the previous embodiment. This has the advantage of increasing the amount of movement of the pile-up work equipment.

7, 8, and 9 show a third embodiment of the present invention.

This example shows an example in which the present invention is applied to a Z-type steel sheet pile. As shown in FIG. 9, the Z-shaped steel sheet pile P has two flanges F extending at right angles from both ends of the web W in opposite directions, and a grip G is formed at the tip of each flange F. With respect to such an existing pile P, the movable claw 31 and the fixed claw 41 are arranged on both sides of the web W so as to sandwich the web W. Moreover, since the moving direction is also parallel to the web W, each moving mechanism 34, 44 for moving these supports 30, 40 is attached to the support frame 3 or the slide frame 4 in parallel to the web W.

Furthermore, a pressing mechanism 32 is installed inside the movable claw supporter 30, and this cylinder 32 is attached so as to press the movable claw 3l perpendicularly to the web W.

The movable claw 31 and the fixed claw 41 are easy to manufacture because their supporting surfaces are flat in accordance with the shape of the web W. This embodiment also has the same effects as the first embodiment.

In addition, in each of the above embodiments, if the pile can be supported only by parallel movement to the flange F, the suppression mechanism may be omitted. In addition, a pressing mechanism is provided on both of the pair of clamping claws,
Both claws may be moved in the direction of one side of the existing pile.

(Effects of the Invention) As explained above, the pile support mechanism according to the present invention moves the pair of clamping claws parallel to one side of the existing pile and clamps that side, so it can operate quickly with a small amount of movement. At the same time, miniaturization can be achieved. Furthermore, it has the advantage of being easier to operate in narrow construction sites.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a side view of a pile-up working device equipped with a pile clamping mechanism according to the first embodiment, FIG. 2 is a cross-sectional view of the first embodiment, and FIG. is a cross-sectional front view taken along line m-m in Fig. 2, and Figs. 4 (A) and (B) are plan views showing the same operation.
Figure 5 is a plan view showing the second embodiment, Figures 6 (A) to (D).
) is a plan view showing the same operation sequence, FIG. 7 is a sectional view showing the third embodiment, FIG. 8 is a front view of the section taken along the line ■-■, and FIG.
A) and (B) are plan views showing the operation. 1...Pile work device 2...Body frame 3.
...Support frame 4...Slide frame 10
, 30... Movable claw supports 11, 31... Movable claws 14, 24... Moving mechanisms 12, 32... Pressing mechanisms 12a, 14a, 24a, 32a, 34a, 44a...
・Cylinder 12b, 14b, 24b, 32b, 34b,
44b...Rod 20.40...Fixed claw supporter

Claims (2)

[Claims] (1) At least a pair of clamping claws arranged opposite to each other so as to sandwich the existing pile at the lower part of the pile-up work device, and a moving mechanism that moves the clamping claws in a direction parallel to one side of the existing pile. A pile clamping mechanism, wherein the pair of clamping claws clamps one side of an existing pile from both sides by the operation of the moving mechanism. (2) The pile clamp according to claim 1, wherein at least one of the pair of clamping claws is configured to press the surface of one side of the existing pile in an orthogonal direction and clamp the existing pile between it and the other clamping claw. mechanism.