JPH076186Y2 - Catch fork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a catch fork that connects a pile driver main body and a leader.

[Prior Art] A conventional catch fork is disclosed in Japanese Utility Model Publication No. 60-11160.

The catch fork of Japanese Utility Model Publication No. 60-11160 will be described with reference to FIGS.

FIG. 4 is a side view of a general pile driver using a catch fork. In the figure, 1 is a pile driver main body composed of a traveling section 2 and a swivel section 3, 4 is a leader (support) which is supported by the pile driver main body 1 via a hoisting boom 5 and a hoisting cylinder 6 so as to be hoistable, 7 Is a catch fork that connects the swivel unit 3 of the pile driver body 1 and the lower part of the leader 4, 8 is an auger screw for excavating a pile hole supported by the leader 4 so as to be rotationally driven, and 9 is a steel sheet pile supported by the leader 4. , 10 are press-fitting devices.

In the pile driver having the above-described configuration, the undulating cylinder 6 is extended to bring the leader 4 upright, the pile hole is excavated in the ground with the August screw 8, and then the steel sheet pile 9 is inserted into the excavated pile hole using the press fitting device 10. The work of press-fitting is repeated to perform the pile driving work.

At this time, as shown in FIG. 5, the pile holes a are made in a zigzag pattern on the left and right sides of the steel sheet pile driving line b.

The details of the conventional catch fork 7 are shown in FIG.

A support frame 11 is rotatably pivoted in the vertical direction on the front part of the swivel part 3 of the pile driver main body 1, and a pair of parallel links 12 extending in the front-rear direction is rotated in the left-right direction at the left and right ends of the support frame 11. The rear portion of the outer frame body 13 that is freely pivoted and extends in the front-rear direction between the tips of the pair of parallel links 12 is pivotally pivoted in the left-right direction so that the support frame 11, the parallel link 12, and the outer frame body 13 are rotatable. To form a parallelogram link 14, and a cylinder 15 is interposed between the support frame 11 and one of the parallel links 12 to make the parallelogram link 14 deformable, and the inner frame body is provided inside the outer frame body 13. 16 is slidably inserted in the front-rear direction, and the outer frame body 13 and the inner frame body 16 constitute a telescopic frame 17, and the telescopic cylinder 18 is interposed between the outer frame body 13 and the inner frame body 16 to extend and contract. Frame 17
Can be expanded and contracted in the front-back direction, and the inner frame 16 of the expandable frame 17
A bracket 19 fixed to the lower part of the leader 4 is pivotally attached to the front part of the rotatably in the vertical and horizontal directions.

In the catch fork 7 having the above-described structure, the telescopic cylinder 18 is extended and the telescopic frame 17 is extended,
By extending or contracting the parallelogram link 14 to deform the parallelogram link 14, the telescopic frame 17 is moved in parallel with the August screw 8 supported by the leader 4 in the front-rear direction and the left-right direction of the steel sheet pile driving line b. Can be excavated in a zigzag manner, and after excavating the pile holes, the steel sheet pile 9 supported by the leader 4 can be moved onto the pile holes by contracting the telescopic cylinder 18 and retracting the telescopic frame 17. Has become.

[Problems to be Solved by the Invention] However, the conventional catch fork described above has the following problems because the telescopic frame 17 is directly attached to the parallel link 12.

Since the amount of expansion and contraction of the telescopic frame 17 cannot be set to a large amount due to the structure, the work range is narrow and, for example, the next pile hole a is excavated unless the pile driver body 1 is moved each time one steel sheet pile 9 is driven. If it is not possible, or if it is desired to change the distance between the pile driver main body 1 and the leader 4 depending on the situation of the work site, the distance cannot be changed to a larger value.

On the contrary, if a large amount of expansion / contraction of the expandable / contractible frame 17 is attempted with the conventional structure, the catch fork 7 becomes long and large in size and heavy in weight, which is not practical.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a catch fork that is small and lightweight and has a wide working range.

[Means for Solving the Problems] The present invention relates to a swing frame supported in the front part of a pile driver main body via a parallelogram link so as to be movable in parallel in the left-right direction, and a front part of the swing frame supported by a leader via a bracket. And a retractable telescopic frame rotatably pivoted in the up-down and left-right directions, which is arranged in two steps, and a support characterized in that the telescopic frame is supported by the swing frame so that the front-back position can be adjusted. It is a fork.

[Operation] When the parallelogram link is deformed, the leader moves to the left and right in parallel to the main body of the pile driver.

When the support position of the telescopic frame with respect to the swing link in the front-rear direction is adjusted to extend and contract the telescopic frame, the distance between the leader and the pile driver main body changes.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention, in which the same reference numerals as in FIG. 6 represent the same parts.

Further, the pile driving machine to which the catch fork of the present invention is applied is the steel sheet pile driving machine shown in FIG. 4, the pile driving machine and other various pile driving machines.

A swing frame 20 is provided between the ends (right ends in FIG. 1) of the pair of parallel links 12, and a parallelogram link 21 is formed by the support frame 11, the parallel link 12, and the swing frame 20. To wear.

A hollow frame body 23 having front and rear openings 22 is integrally formed on the upper portion of the swing frame 20, and an outer frame body 24 extending in the front-rear direction is slidably inserted into the inside of the frame body 23, Frame 24
A bracket 26 having a pin hole 25 is attached to the front and rear sides of the rocking frame 20, and notches 27, 27 'into which the bracket 26 is inserted are formed in the front and rear portions of a frame 23 formed in the swing frame 20. The bracket 2 above and below the notches 27, 27 '
Bracket 2 with pin holes 28 that can match 6 pin holes 25
9, 29 'is attached, and at least one of the brackets 29, 29' (rear side in FIGS. 1 and 2) is provided with a plurality of pin holes 30 having predetermined intervals in the front-rear direction for position adjustment. The link 31 is detachably and pivotally attached (or the position adjustment link).
31 may be fixed to the frame 23).

An inner frame body 33 extending in the front-rear direction is slidably inserted into the outer frame body 24, and an extendable frame 35 is formed by interposing an extendable cylinder 34 between the inner frame body 33 and the outer frame body 24. .

A bracket 19 attached to the reader 4 is pivotally attached to the front portion of the inner frame 33 so as to be vertically and horizontally rotatable.

Next, the operation will be described.

By expanding and contracting the cylinder 15, the parallelogram link 14
Is deformed and the reader 4 is moved in parallel in the front-rear direction and the left-right direction via the swing frame 20 and the telescopic frame 35. By performing the parallel movement in this manner, the swing frame 20 and the telescopic frame
Since the center points of 35 and the leader 4 are kept in agreement, it is possible to prevent the swing frame 20 and the telescopic frame 35 from being subjected to an unbalanced load.

Swing the pin hole 25 on the bracket 26 of the outer frame 24 into the swing frame 20.
The bracket 32, 29 'of the frame body 23 formed in the above or the pin 32 by aligning with one of the pin holes 28, 30 of the position adjusting link 31.
By inserting, the position of the outer frame body 24 with respect to the swing frame 20 is adjusted in the front-rear direction. By adjusting the position of the outer frame body 24 in the front-rear direction in this manner, the telescopic frame 35
The expansion range of is expanded. Further, the length of the outer frame body 24 is longer than that of the conventional one shown in FIG. 6 by the amount of position adjustment, and the inner frame body 33 can be lengthened accordingly, so that the amount of expansion and contraction of the telescopic frame 35 is increased. Can be significantly increased, and the expansion range of the expansion / contraction range is further increased.

Incidentally, the catch fork of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Advantages of the Invention] As described above, according to the catch fork of the present invention, the telescopic frame is provided on the upper portion of the swing frame and is supported so that the position of the swing frame can be adjusted in the front-back direction. It has an excellent effect that it is lightweight and can secure a wide working range.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a view of III-III arrow of FIG. 1, and FIG. 4 is a steel sheet pile driving machine. FIG. 5 is a side view, FIG. 5 is a pile driving work process diagram according to FIG. 4, and FIG. 6 is a plan view of a conventional catch fork. In the figure, 1 is a pile driver main body, 4 is a leader, 19 is a bracket, 20
Is a swing frame, 21 is a parallelogram link, and 35 is a telescopic frame.

Claims (1)

[Scope of utility model registration request] 1. A swing frame supported on the front part of the main body of the pile driver through a parallelogram link so as to be movable in parallel in the left-right direction, and a front part of the swing frame can be freely rotated in the vertical and horizontal directions via a bracket on a reader. A catch fork characterized in that an extendable telescopic frame pivotally attached to the upper and lower parts is arranged in upper and lower two stages, and the telescopic frame is supported by the swing frame so as to be able to adjust the position in the front-rear direction.