JPH076196B2 - Pile press-in / pull-out machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pile press-fitting / pulling-out machine capable of press-fitting and pulling-out a pile such as a lightweight steel sheet pile used in various civil engineering construction works in the vicinity of an obstacle or the like. Regarding

(Prior Art) When a pile such as a steel sheet pile is press-fitted into the ground, a pile press-fitting / extracting machine that runs on the pile is used. FIG. 9 shows a conventional pile press-in / pull-out machine, in which a saddle 80 having a plurality of clamps 82 vertically installed.
The mast 81 is erected on the top. The mast 81 can be moved back and forth by a lower slide frame 83, and a chuck arm 84 is attached to the tip end portion so as to be vertically movable.
A chuck 85 is attached to the tip of the chuck arm 84 so as to be rotatable by 180 degrees. The chuck 85 has a cylindrical outer shape, and the press-fitting pile Pn is inserted through the chuck 85 and held.

Next, the press-fitting operation of the piles of this pile press-fitting and extracting machine will be described.

The existing pile P is clamped by the clamp 82 to obtain a reaction force, and the pile Pm is press-fitted into the ground by connecting to the existing pile P at the tip. After that, the slide frame 83 is advanced by one pile width, the chuck 85 is rotated 180 degrees, the sandwiching direction of the pile is reversed, a new pile Pn is sandwiched, and the pile Pn is connected in front of the existing pile Pm and press-fitted into the ground. To go.

When the pile Pn is press-fitted halfway, the press-fitting is stopped once. The holding state of the existing pile P of the clamp 82 is released, and the clamp 82 is lifted to the upper side of the existing pile P together with the saddle 80, and the pile width is advanced by one sheet.

After this, the clamp 82 is lowered and the existing piles Pm, P, ... Are again gripped to secure the reaction force. Then, the chuck 85 is lowered to completely press-fit the pile Pn which is being press-fitted. By repeating this operation, the piles are continuously pressed.

FIG. 8 shows the state of construction as described above, and the adjacent piles P, P are continuously press-fitted with the web portions alternately facing in opposite directions.

(Problems to be Solved by the Invention) In the conventional apparatus, the chuck has a cylindrical shape, and the chuck has a large outer diameter because a length between grips of the piles, that is, a diameter capable of inserting the entire pile width is required. Therefore, when the pile is press-fitted at the construction site so as to approach an adjacent object such as a structure, the distance between the adjacent object is at least the outer diameter of the chuck, which causes a limitation in the adjacent construction of the adjacent object.

Therefore, in the prior art, the degree of freedom in design such as the improvement of the building coverage ratio and the utilization of the effective space are limited. In particular, in the case of a lightweight steel sheet pile in which the web portions of all the steel sheet piles face the same direction, approach press-fitting to an adjacent object is possible and construction can be performed with a comparatively small bulk width as compared with the above case.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a device that can press into and pull out a pile by approaching an adjacent object.

(Means for Solving the Problem) In the pile press-fitting / extracting machine of the present invention, a clamp is vertically provided on a lower portion of a saddle on which a slide frame is attached so as to be movable back and forth,
A mast is rotatably erected on the slide frame, and a guide rail having a fitting groove is rotatably attached to the front end of the mast, and the rod tip of the lifting cylinder of the chuck is attached to the lower end of the guide rail. On the other hand, while being fixed, a support having a chuck at its lower end is fixed to the lifting cylinder, and the support is slidably fitted in the fitting groove.

(Operation) Pile press-in / pull-out machine is erected on the existing pile by holding the upper end of the existing pile, such as lightweight steel sheet pile, which is press-fitted close to the adjacent object, so that it does not contact the adjacent object with the clamp at the bottom of the saddle. .

The press-fitting pile is held by a chuck so as to be close to the adjacent object and connected to the front end of the existing pile. Then, the chuck is lowered by the lifting cylinder at the tip of the mast, and the pile is completely pressed into the ground.

After that, the slide frame is advanced so that the chuck holds a new pile, and the pile is connected to the existing pile at the front end and press-fitted to a proper depth, and the press-fitting of the pile is once stopped. After that, the clamp pile is released from the held state, and the clamp is raised along with the mast along the guide rail. After advancing the saddle in this state, the clamp is lowered and the existing pile is held again. Then, the chuck is lowered again to press the press-fitting pile to the end.

When press-fitting the piles at the corners or curving the pile rows, the mast and guide rails on the slide frame are appropriately rotated, and the slide frame is moved back and forth with respect to the saddle to reduce the press-fit angle. Can be adjusted.

(Example) The Example of this invention is described based on drawing. 1 to 3 show a first embodiment of the pile press-fitting / pulling machine of the present invention. A cylinder 7 is provided at the tip of a mast 3 erected on the saddle 2, and a chuck 10 is attached to the lower end of the cylinder 7. A plurality of clamps K for gripping an existing pile P such as a lightweight steel sheet pile and supporting the device 1 on the existing pile P are provided on the lower edge of the saddle 2.

A slide frame S movable in the front-rear direction is provided on the saddle 2, and the mast 3 is erected on the slide frame S. Therefore, by moving the slide frame S back and forth, the mast 3 and the saddle 2 relatively move back and forth.

The mast 3 can be swung within a predetermined range by a swivel mechanism 3a such as a hydraulic motor, and when the pile row is curved and press-fitted, the connection direction can be adjusted. (Refer to arrow α in FIG. 2) A guide rail 4 having a T-shaped fitting groove 4a formed in the front is rotatably attached to the tip of the mast 3.
A turning cylinder 5 is provided between the guide rail 4 and the mast 3, and the guide rail 4 can be turned horizontally by expanding and contracting the rod 5a.

Further, the lower end of the guide rail 4 is bent forward to form an arm 6. The tip of the arm 6 has a rod 7a of an ascending / descending cylinder 7 of a chuck 10 pivotally attached by a pin 8.

The lifting cylinder 7 has a supporting body 9 of a chuck 10 fixed to the outer peripheral surface thereof, and a sliding portion 9a having a T-shaped cross section on the side portion of the supporting body 9.
And is fitted into the fitting groove 4a so as to be vertically slidable.

Therefore, when the rod 5a of the cylinder 5 is expanded and contracted, the elevating cylinder 7 rotates together with the guide rail 4. By this rotation, the press-fitting direction of the pile can be further finely adjusted. (Refer to arrow β in FIG. 2) When the rod 7a expands and contracts, the elevating cylinder 7 moves up and down along with the support 9 along the guide rail 4, and accordingly the chuck 10 moves up and down to press and pull out the lightweight pile P. It will be possible.

As shown in FIG. 2, the chuck 10 has an insertion hole 11 larger than the width of the pile P, a movable pawl 12a and a fixed pawl 12b are arranged to face each other, and a movable cylinder 12a is advanced by a holding cylinder 12 to advance the lightweight pile P. Hold the.

Next, a method for press-fitting the lightweight pile P using the pile press-fitting / pulling machine 1 will be described.

In the lightweight pile P, all the sheet piles are continuously pressed into the same direction. Therefore, the chuck 10 does not have to be inverted every time press-fitting is performed in accordance with the press-fitting direction of the pile.

In this construction, the pile press-fitting / pulling machine 1 is fixed on the existing pile P by the clamp K, the press-fitting pile Pm is gripped by the chuck 10, and the cylinder 7
Start by activating.

After press-fitting the pile Pm, the slide frame S is slid by one pile, a new pile Pn is inserted into the chuck 10, connected to the pile Pm, and similarly pressed into the ground.

When this pile Pn is press-fitted halfway, the press-fitting is temporarily stopped, the holding state of the pile P by the clamp K is released, the rod 7a is retracted, and the clamp K is moved above the pile together with the saddle 2 and the slide frame S. In this state, the saddle 2 is advanced along the slide frame S by one pile.

Then, the clamp K is lowered to grasp the existing piles P, ..., Pm again, and the pile Pn in the middle of press-fitting is completely press-fitted into the ground.

Particularly, in the present embodiment, when the pile P is curved and press-fitted, the angle can be adjusted by appropriately operating the turning mechanism 3a of the mast 3 and the turning cylinder 5. Therefore chuck 10
Can make a large bend without coming into contact with the adjacent object A, and a smooth curve press-fit can be made as shown in FIG.

By repeating the above operation, the pile press-fitting / pulling machine 1 of the present embodiment can continuously press-fit the pile P, and the pile can be pulled out by the operation reverse to the above.

As described above, the present embodiment is a pile press-fitting / pulling machine for lightweight steel sheet piles, the chuck is flat and the side surface thereof is flat, and the press-fitting direction of the pile is limited to one direction. It can be press-fitted closer to A, and the effective space can be expanded by improving the building coverage ratio.

Further, since a curved pile of the pile can be easily formed, the degree of freedom in construction is increased, the size is smaller than that of the conventional machine, and the structure of the entire device is simple, so that the operation is reliable and the control is easy.

FIG. 5 is a side view of the second embodiment. In this embodiment, the chuck 20 is configured to be rotatable. A turning means for the chuck 20 is built in the support 9, and a gear 9b for rotating the chuck 20 is formed at the lower end of the support 9. Also, chuck 20
A swivel portion 20a is formed at the upper end of the, and a gear 20b that meshes with the gear 9b is formed at the upper portion of the swivel portion.

Therefore, when the gear 9b is rotated, the chuck 20 moves to the swivel portion 20a.
It revolves below the support body 9 around. When the cylinder 7 is operated, the chuck 20 moves upward together with the support body 9.

Since the method for press-fitting the lightweight pile P according to the present embodiment is the same as that described above, description thereof will be omitted, and only cornering will be described.

As shown in FIG. 6 (a), the press-fitting pile Pr is held by the chuck 20 and positioned at right angles to the tips of the linearly press-fitted piles P, P ... And press-fitted into the ground. Next, as shown in FIG. 6 (b), the pile Ps is completely press-fitted by being connected to the pile Pr and the cornering is completed. At this time, the chuck 20 is rotated as necessary as described above, and the press-fitting piles Pr and Ps are connected to the existing piles P.

By repeating the above operation, the pile press-fitting / pulling machine 21 of the present embodiment can continuously press-fit the pile P, and the pile P can be pulled out by the operation reverse to the above.

Further, FIG. 7 is a plan view of another embodiment of the chuck among the above embodiments. The chuck body 42 of this chuck 40
Is a planar U-shape with a front end cut out to provide an opening 47, and a fixed claw 43 is formed inside the front end.

Then, while forming an insertion portion 44 of the lightweight steel sheet pile P between the fixed claw 43 and the chuck body 42, a holding cylinder 45 is provided in the chuck body 42, and a movable claw 46 is provided at the tip of the holding cylinder 45. I am configuring.

The movable claw 46 is arranged at a position facing the fixed claw 43, and holds the lightweight steel sheet pile P inserted in the insertion portion 44 between the movable claw 46 and the fixed claw 43.

Thus, the chuck 40 is much smaller and the outer surface 42
Since c is formed flat, the amount of protrusion is small, and the lightweight steel sheet pile P can be press-fitted closer to a building or the like.

When a new lightweight steel sheet pile P is inserted into the chuck 40, it is not necessary to lift it up above the chuck by a crane or the like as in the conventional case, and the lightweight steel sheet piles P are preliminarily arranged side by side on the construction site in a vertical line and sequentially. It becomes possible to insert it into the chuck 40 for construction. Therefore, there is no waste in the crane lifting work, and the construction time can be shortened.

Even when the lightweight steel sheet pile P is pulled out, the chuck 40 is not lifted without lifting the lightweight steel sheet pile P in the chuck with a crane or the like.
It can be quickly removed from the opening 47.

Further, the chuck 40 can be separated from the lightweight steel sheet pile P during the drawing of the lightweight steel sheet pile P. Therefore, the remaining extraction work during the extraction is performed by a crane or the like, and during that time, the chuck 40 can prepare for the next extraction work of the lightweight steel sheet pile P, so that the construction time can be shortened.

When there is an obstacle in the lateral direction of the chuck 40, the lightweight steel sheet pile P can be inserted from above by a crane or the like. In this way, the chuck 40 is used to insert the lightweight steel sheet pile P.
It can be either above or sideways, and the insertion method can be selected depending on the site situation.

(Effects of the Invention) As described above, according to the present invention, a pile of lightweight steel sheet pile or the like can be press-fitted closer to an adjacent object, and the degree of freedom in construction increases. Also, curve press fitting and corner press fitting can be easily performed. The structure of the device is simple and the maintenance is easy, and the work efficiency is further improved by selecting a chuck with one side open.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view of a first embodiment of a pile press-fitting / pulling machine, Fig. 2 is the same plan view, Fig. 3 is the same front view, and Fig. 4 is a book. FIG. 5 is an explanatory view showing an example of press-fitting a pile according to the invention, FIG. 5 is a side view of a second embodiment of a pile press-fitting / extracting machine, FIG. 6 is an explanatory view of corner driving, and FIG. 7 is another embodiment of a chuck. FIG. 8 is a plan view, FIG. 8 is an explanatory view showing an example of press fitting in a conventional machine, and FIG. 9 is a side view of the conventional machine. 1, 21 …… Pile press-in / pull-out machine, 2 …… Saddle 3 …… Mast, 3a …… Swing mechanism 4 …… Guide rail, 4a …… Mating groove 5 …… Swivel cylinder, 5a, 7a …… Rod 6 …… Arm, 7 …… Elevating cylinder 9 …… Supporting body, 9a …… Sliding part, 10 …… Chuck 12a …… Movable claw, 12b …… Fixed claw P …… Pile, K …… Clamp S …… Slide Frame, A ... Adjacent objects

Claims (3)

[Claims] 1. A clamp is vertically provided on a lower portion of a saddle having a slide frame attached to the upper portion so as to be movable back and forth, a mast is rotatably provided on the slide frame, and a fitting groove is provided at a front end of the mast. The formed guide rail is rotatably mounted, and the rod tip of the lifting cylinder of the chuck is fixed to the lower end of the guide rail, while a support equipped with a chuck at the lower end is fixed to the lifting cylinder, and the support is fixed. A pile press-fitting / extracting machine that is slidably fitted in the fitting groove. 2. The pile press-fitting / pulling machine according to claim 1, wherein at least one side surface of the chuck is formed into a flat surface. 3. The pile press-fitting / pulling machine according to claim 1, wherein an opening portion is formed at one end of the chuck.