JP2528071B2 - Pile clamping device for pile press-in / pull-out machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is Kuikyo JiSo location of pile press-drawing machine for inserting the jet hose having a jet nozzle for jetting pressurized water or the like in the vicinity of the tip of the pile in order to reduce the press-in resistance of the pile about the.

[0002]

2. Description of the Related Art When press-fitting a pile into hard ground, in order to reduce the press-fitting resistance and facilitate the press-fitting, a jet hose is attached to the pile while jetting pressure water from a jet nozzle at the tip of the jet hose. The stake may be pressed in. In this case, a jet hose having a jet nozzle at its tip is put along the pile, and the jet nozzle at the tip is fixed to the vicinity of the tip of the pile by welding or banding by a pipe band. At the time of press-fitting the pile, the pile is gripped by the chuck of the press-fitting / extracting machine and the chuck is lowered while supplying pressurized water from the jet hose to press-fit the pile. In order to collect the jet hose when the press-fitting of the pile is completed, the jet hose was strongly pulled upward to remove the sticking of the jet nozzle to the pile and collect the jet hose.

[0003]

When the pile is attached to the chuck of the pile press-in / pull-out machine, a recess is provided in the pile holding portion inside the chuck so that the jet hose attached to the pile is not caught by the chuck. By inserting a jet hose into this recess, it is possible to prevent pinching. However, there are cases where the jet hose jumps out of the concave portion and is sandwiched by the chuck portion while the press-fitting operation of the pile is repeated. In this case, the pressurized water is not supplied and the injection is not performed, so that the effect of reducing the press-fitting resistance cannot be expected. In addition, it takes time to check the presence or absence of entrapment and to return it to the normal position, resulting in poor work efficiency, and damage due to entrapment makes reuse difficult.

Further, when the jet hose is strongly pulled from above at the time of recovery and the jet nozzle is dismounted, the hose may be damaged or the jet nozzle at the tip may come off. It took time to reattach it. Further, when the hose is pulled up, there is a problem that it takes time because muddy soil adheres to the hose and becomes bulky. The present invention solves the above-mentioned problems, and a jet hose attached to the pile when the pile is attached to the pile can be easily attached without being caught in the chuck, and the jet nozzle can be easily removed at the time of collecting the jet hose. performing the pulling of the hose smoothly aims to provide Hisage <br/> the Kuikyo JiSo location of pile press-drawing machine which may.

[0005]

Means for Solving the Problems In order to achieve the above object, a pile holding device of the present invention is a pile holding device for a pile press-fitting / extracting machine in which a movable holding portion for holding a pile and a fixed holding portion are arranged to face each other . the interpolation hole, and characterized by forming a cleaning apparatus having a water injection hole water injection toward the center of the insertion hole
I do.

[0006] Further, a movable holding portion for holding the pile and a fixed holding portion.
Of the pile clamping device of the pile press-in / pull-out machine in which the parts are arranged to face each other.
The recessed part where the jet hose fits on the movable holding part side.
Form a jet hose on the upper side of the movable holding part.
Form an insertion hole for insertion and pour water toward the center of the insertion hole.
A cleaning device having a water injection hole for
It

[0007]

A jet hose equipped with a jet nozzle having a locking cylinder inside is inserted into the insertion hole of the movable holding portion. On the other hand, the press-fitted pile is clamped in the clamp part. The piston rod of the jet nozzle is extended and locked in the locking hole of the jet nozzle mounting portion of the pile to fix the jet nozzle to the pile. The pile is press-fitted while jetting the pressurized water from the jet nozzle, and the jet nozzle is collected together with the jet hose after being press-fitted to a predetermined depth. To remove the jet nozzle from the pile mount, reduce the piston rod of the locking cylinder and pull up the jet hose. As a result, the engagement with the mounting portion is released, and it can be easily collected. At this time, the mud adhering to the jet hose can be removed by pulling it up while injecting water with the cleaning device, and the recovery work can be carried out smoothly.

[0008]

Embodiments of the present invention will be described with reference to the drawings. The chuck device 1 is attached to the front of a mast (not shown) of the pile press-fitting / pulling machine so as to be vertically movable.
As shown in FIG. 3, the chuck device 1 is formed with an opening 4 through which a pile P and a jet hose 8 having a jet nozzle 7 at its tip are inserted. Then, a fixed holding part 2 for holding the pile P and a movable holding part 3 are arranged to face each other inside the opening 4, the fixed holding part 2 is fixed to the chuck device 1, and the movable holding part 3 is It is attached to the chuck device 1 by a working cylinder 6 so that it can expand and contract. An insertion hole 5 through which the jet hose 8 is inserted is provided in the center of the movable holding portion 3.
Is formed and a cleaning mechanism having a water injection hole 9 is provided inside thereof (FIGS. 3 and 4).

FIGS. 5 to 7 show another embodiment of the pile holding device according to the present invention. The movable holding portion 3 side of the chuck device 1 has a recessed portion 15 into which the pile P fits from above. It is formed vertically downward. The recessed portion 15 of the movable holding portion 3 is formed to be somewhat deep in the horizontal direction so that the jet hose 8 can be moved even if the movable holding portion 3 moves to hold the pile P.
It is configured not to push out.

The cleaning device 16 formed in a substantially cylindrical shape is disposed above the movable holding part 3 of the chuck device 1,
An insertion hole 17 for inserting the jet hose 8 is provided in the center thereof, and a water injection hole 18 is formed on the inner periphery of the insertion hole 17. A water conduit 19 for cleaning is externally provided to the cleaning device 16.
Is connected to clean the mud adhering to the jet hose 8 by water injection from the water injection hole 18. In this way, the cleaning device 16 arranged on the upper side of the movable holding unit 3 side
Since the jet hose 8 is inserted in the
Does not come out of the recessed portion 15 even when is moved, and therefore is not caught in the pile holding portion even if the press-fitting operation of the pile is repeated.

As shown in FIG. 8, the jet nozzle 7 attached to the tip of the jet hose 8 is internally provided with two locking cylinders 11 each having a piston rod 12 extending to the outer periphery of the jet nozzle 7. An oil feed pipe 10 for supplying pressure oil to the locking cylinder 11 is incorporated in the jet hose 8 (FIG. 20). The piston rod 12 of the jet nozzle 7 is contracted to the shortest distance, and the jet hose 8 together with the jet nozzle 7 is inserted into the insertion hole 5 of the movable holding portion 3.
Can be easily inserted.

As shown in FIG. 9, a mounting portion 14 for mounting the jet nozzle 7 is projected near the tip of the pile P, and a piston rod 12 of the jet nozzle 7 is extended and engaged in a locking hole 13 of the mounting portion 14. Then, the jet nozzle 7 can be attached to the pile P. The jet nozzle 7 can be removed from the pile P by pulling up the jet hose 8 in a state where the piston rod 12 is contracted and removed from the locking hole 13.

As shown in FIG. 10, in this embodiment, instead of providing the mounting portion for the jet nozzle 7, the piston rod 12 is used.
Is a configuration in which a locking hole 13a for locking is formed in the pile P.
If such a locking means is adopted, only one locking cylinder 11 is required, the number of parts can be reduced, and the mounting work of the mounting portion can be omitted. The jet nozzle 7 can be attached and detached by extending and retracting the piston rod 12 and attaching and detaching it to and from the locking hole 13a, and the same operation as in the case of the above embodiment can be performed.

When mounting with one locking cylinder 11 as shown in FIG. 11, a locking claw 21 for securely mounting the pile P is rotatably mounted in the recess 20 of the jet nozzle 7. ing. Prior to press-fitting the pile P, the piston rod 12 is extended and inserted into the locking hole 13a, and the jet nozzle 7 is attached to the pile P. At this time, by hooking the hooks 21 on the lower edge of the hook holes 22 of the pile P, the pile P can be securely attached without being detached in the horizontal direction.

As shown in FIG. 12, when the jet hose 8 is collected, the piston rod 12 is contracted to remove the attachment to the pile P and the jet hose 8 is pulled up, so that the latch claw 21 is unlocked from the latch hole 22. The latch claw 21 rotates downward by its own weight and is housed in the recess 20. For this reason, the jet hose 8 does not cause pulling resistance due to the hook 21.
Can be collected smoothly. Although the hooks 21 are provided below the locking cylinder 11 in this embodiment, the same effect can be obtained by providing the hooks 21 above.

In the embodiment shown in FIG. 13, a pin insertion hole 23 is horizontally formed at the tip end portion of the piston rod 12 instead of providing the hook 21 and a split pin 24 is provided in the pin insertion hole 23.
Is to be inserted. In this way, even if the pile P moves in the horizontal direction, the split pins 24 prevent the movement, and the separation is prevented, so that the attachment can be ensured. The split pin 24 does not need to be inserted through the pin insertion hole 23 as long as one end of the split pin 24 or an ordinary pin projects. To remove the jet nozzle 7 from the pile P, the piston rod 12 can be easily recovered by shrinking the piston rod 12, connecting and disconnecting the split pin 24, pulling out the piston rod 12 from the locking hole 13a, and pulling up the jet hose 8. .

FIG. 15 and FIG. 16 show another embodiment of the mounting mechanism of the jet nozzle 7, in which the pair of rotation locking claws 26a, 26b are rotatable in the recess 20 of the jet nozzle 7. Installed. Each of the rotation latching claws 26a and 26b is rotatably driven by the respective piston rods of the two latching claws 25a and 25b installed in the jet nozzle 7, and the respective rotation latching claws 26a and 26b.
Each of the tips has an upper edge 27 and a lower edge 2 of the hook hole 22 of the pile.
The jet nozzle 7 is attached to the pile P by being brought into contact with and hooked on the pile 8.

In order to recover the jet nozzle 7 after press-fitting the pile P, first, the piston rod of the rotation latching claw 26a latched on the upper edge 27 of the latching hole 22 is contracted to remove the latch, and the jet is set. Pull up the hose. As a result, the engagement between the lower edge 28 and the rotation engagement claw 26b is released. Further, if each of the latching claw cylinders 25a and 25b is reduced, each of the rotating latching claws 2
6a and 26b rotate downward and are housed in the recess 20.
Therefore, it is possible to smoothly collect the jet nozzle 7 together with the jet hose without causing pulling resistance due to the rotation hooks 26a and 26b. It is also possible to simplify the configuration by omitting one latching claw cylinder by using the latching claw that abuts and latches the lower edge as a fixed latching claw.

FIG. 17 and FIG. 18 show another embodiment of the mounting mechanism of the jet nozzle 7, which is a rotation latching pawl 26 which is rotated by the extension / contraction operation of the latching cylinder 25c.
An attachment mechanism constituted by c and the fixed hook 29 is attached to the outer periphery of the jet nozzle 7. The fixed hook 29 is brought into contact with the inside of the tip of the pile P, and the hook cylinder 2
5c is actuated to bring the rotation stopping claw 26c into contact with the outer side of the tip end of the pile P to sandwich the pile P and attach the jet nozzle 7 to the pile P.

As a result, the pile P is prevented from moving in both the vertical and horizontal directions, so that the jet nozzle 7 can be securely attached. Although a pair of attachment mechanisms are provided on both sides in this embodiment, only one of them may be provided.
Further, by covering the mounting mechanism with the protective case 31, damage to the mounting mechanism can be prevented. By adopting the mounting mechanism of the present embodiment, it is possible to omit processing work such as drilling the locking hole of the pile and welding the mounting portion.

FIG. 19 shows another embodiment of the mounting mechanism of the jet nozzle 7, in which the locking cylinder 34 is provided in the jet nozzle 7 and the pressure from the oil feed pipe inserted in the jet hose is used. Operated by oil. The locking cylinder 34 is provided inside the movable claw piston 32 so that the piston 33 can be inserted and removed, and the inner circumference of the tip of the movable claw piston 32 is tapered so that the piston 33 moves rightward in the drawing. The taper of the outer periphery of the tip of the piston 33 is in contact with this taper.

The jet nozzle 7 is attached to the pile P by
First, pressure oil is supplied from the port B, and the movable claw piston 32 is inserted into the hook hole 22a. Next, the pressure oil from the port A moves the piston 33 to the right in the drawing, and the taper at the tip of the piston 33 makes contact with the inner peripheral taper of the movable claw piston 32. Since the movable claw piston 32 has the slit 35 formed therein, the tip end of the movable claw piston 32 is widened and attached to the hook hole 22a. To remove the jet nozzle 7, the pressure oil from the port B moves the piston 33 to the left in the drawing to release the engagement between the movable claw piston 32 and the engagement hole 22a, and the pressure oil is supplied from the port C. The movable claw piston 32 is moved leftward in the figure. As a result, the jet nozzle 7 is removed and the movable claw piston 32 is housed in the recess 20a, so that the jet nozzle 7 is smoothly recovered without causing pulling resistance.

The operation of the embodiment of the present invention will be described with reference to the drawings. First, the chuck device 1 is moved to the upper part of the mast (not shown) of the pile press-fitting / pulling machine, the pile P is inserted into the opening 4 of the chuck device 1, and the movable holding portion 3 is driven by the operating cylinder 6. The pile P is clamped (FIGS. 1 and 2). As shown in FIG. 20, an oil feed pipe 10 is internally provided in the insertion hole 5 of the movable holding portion 3, and a jet hose 8 having a jet nozzle 7 attached to the tip thereof is inserted therein. Then, pressure oil is supplied from the oil feed pipe 10 and the piston rod 12 of the locking cylinder 11 attached to the jet nozzle 7 is contracted to the locking hole 13 of the jet nozzle mounting portion 14 mounted at the tip of the pile P. Fit the piston rod 12. Then, the piston rod 12 is extended and the jet nozzle 7 is attached to the pile P (FIGS. 8 and 9).

The chuck device 1 is supplied with pressure water supplied to the jet hose 8 and jetted under pressure from the jet nozzle 7.
Is lowered and press-fitting of the pile P is started. When the pile P is press-fitted to a predetermined depth, the supply of the pressurized water is stopped, the jet nozzle 7 is removed from the pile P, and the jet hose is recovered. This removal is done by connecting the jet nozzle 7 to the oil delivery pipe 10
Pressure oil is supplied through the cylinder to reduce the piston rod 12 of the locking cylinder 11 so that the jet nozzle mounting portion 1
Remove the engagement of the piston rod 12 from the locking hole 13 of 4,
It can be easily removed by pulling up the jet hose 8.

When collecting the jet hose 8, as shown in FIGS. 3, 4, 5 and 7, the mud adhered to the jet hose 8 is removed by pouring water into the insertion hole through which the jet hose 8 is inserted. Therefore, it can be collected smoothly. Further, when the piston rod 12 of the locking cylinder 11 of the jet nozzle 7 is pulled up in the extended state at the time of recovery, the extended piston rod 12 is caught by the insertion hole 5 of the jet hose 3 and the edge of the recessed portion 15. It serves as a stopper to prevent the jet nozzle 7 from being pulled out, and can be prepared for mounting the jet nozzle to the next press-fitting pile.

[0026]

Since the present invention is configured as described above, it is possible to prevent the jet hose from being pinched by the chuck device, and it is not necessary to check the presence or absence of the pinching condition, so the working time is shortened. Further, the jet hose is not damaged by being pinched and can be used repeatedly, which is economical . With improved fast, easy working efficiency for collecting while removing mud jet hose in is found,
Since it is always cleaned, it is economical with little damage.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention.

FIG. 2 is a vertical sectional view of an embodiment of the present invention.

FIG. 3 is a perspective view of an embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a vertical cross-sectional view of a pile holding device equipped with a cleaning device.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a plan view of the cleaning device.

FIG. 8 is a vertical sectional view of a jet nozzle.

FIG. 9 is a perspective view of a jet nozzle mounting portion.

FIG. 10 is a vertical sectional side view showing a mounting state of a jet nozzle.

FIG. 11 is a vertical sectional side view showing a mounted state of the jet nozzle.

FIG. 12 is a vertical sectional side view of a jet nozzle having hooks.

FIG. 13 is a vertical sectional side view showing a mounted state of a jet nozzle.

FIG. 14 is a horizontal cross-sectional view showing a mounted state of a jet nozzle.

FIG. 15 is a vertical cross-sectional side view showing a mounting state of a jet nozzle.

FIG. 16 is a front view of a jet nozzle.

FIG. 17 is a side view showing a mounted state of the jet nozzle.

FIG. 18 is a bottom view showing a mounting state of the jet nozzle.

FIG. 19 is a side view showing a mounting state of the jet nozzle.

FIG. 20 is a cross-sectional view of a jet hose with an oil feed pipe inside.

[Explanation of symbols]

 1 Chuck Device 2 Fixed Clamping Part 3 Movable Clamping Part 4 Opening 5, 17 Insertion Hole 6 Working Cylinder 7 Jet Nozzle 8 Jet Hose 9, 18 Water Injection Hole 10 Oil Feed Pipe 11, 34 Locking Cylinder 12 Piston Rod 13 Locking Hole 15 Recessed notch 16 Cleaning device 19 Cleaning water conduit 20 Recess 21 Retaining pawl 22, 22a Retaining hole 23 Pin insertion hole 24 Split pin 25a, 25b, 25c Retaining claw cylinder 26a, 26b, 26c Rotating hanging Stop Claw 32 Movable Claw Piston 33 Piston

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Tanaka 3948, Fushida, Kochi City, Kochi Prefecture Giken Seisakusho Co., Ltd. (56) Reference JP-A-63-189524 (JP, A) (JP, U) Actual Kaihei 1-180541 (JP, U)

Claims (2)

(57) [Claims] Claim: What is claimed is: 1. In a pile holding device of a pile press-fitting / extracting machine in which a movable holding portion for holding a pile and a fixed holding portion are arranged to face each other, an insertion hole for inserting a jet hose is provided in the movable holding portion, and the insertion hole is provided in the insertion hole. A pile clamping device for a pile press-fitting / extracting machine having a cleaning device having a water injection hole for injecting water toward the center of the insertion hole. 2. A pile clamping device of a pile press-fitting / extracting machine in which a movable clamping section for clamping a pile and a fixed clamping section are arranged so as to face each other, and a concave cutout section to which a jet hose is fitted is formed on the movable clamping section side. A pile clamping device for a pile press-fitting / extracting machine, in which a cleaning device having an insertion hole through which a jet hose is inserted and having a water injection hole for injecting water toward the center of the insertion hole is arranged in the upper part of the movable clamping unit side.