JPH0619637Y2 - Clamping mechanism for work equipment on pile - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is used for a pile punching machine for driving or pulling steel piles such as steel sheet piles into the ground, or for pile punching work. The present invention relates to a clamp mechanism mounted on various working devices on an existing pile such as a crane for cargo handling.

(Prior art) When constructing riverbanks, bridges, and other civil engineering works, various steel piles are continuously driven and used. As shown in FIG. 8, a pile punching / pulling machine for driving these piles has a slide base 3 slidably provided in a horizontal direction (left and right direction in FIG. 8) with respect to a base 2 below the device. A mast 4 is erected on the upper surface, and a chuck device 5 that holds a pile is slidably attached to the mast 4 in the vertical direction (vertical direction in FIG. 8). Further, clamps 6a to 6c for holding the existing piles P are provided on the lower surface of the base 2.

At the time of driving the piles, the appropriate number of the clamps 6a to 6c provided on the lower end surface of the base 2 are used to drive the appropriate number of the piles P2.
By holding the upper ends of P4 to P4, the pile punching / pulling machine 1 is fixed on the pile row, and the chuck device 5 is lowered while obtaining the reaction force at the time of driving from the existing piles P2 to P4. Type in.

Then, the driving is temporarily stopped during the driving, and the clamps 5 hold the driving pile P6 and release the clamps 6a to 6c from the existing piles P2 to P4, and the lower end of the clamp 6 is moved to the existing pile P. And the base 2 is moved forward with respect to the slide base 3 by one pitch of the pile.

Next, the base 2 is lowered and the respective clamps 6a ...
6c holds the piles P3 to P5 located immediately before each of the piles P2 to P4 which it has been holding. Then, the chuck device 5 is lowered again to complete the driving of the driving pile P.

The reason why the clamp 6 is raised above the top of the existing pile P in this way is as follows.

As shown in FIG. 10, a conventional clamp 61 has a structure in which left and right holding claws 61a and 61b for holding a pile are integrally formed, and a U-shaped pile inserting portion 62 is formed in a central portion. Was there.

Then, the pile P is sandwiched by pressing the web of the pile P inserted into the pile insertion portion 62 by the sandwiching mechanism 63 of the pile, which is provided inside the clamp 61, by the hydraulic cylinder to the sandwiching claw 61a.

The pile insertion portion 62 had a width slightly wider than the thickness of the pile in order to avoid an increase in size of the clamp and the cylinder.

Therefore, when the piles P0 to P6 are U-shaped steel sheet piles,
As shown in FIG. 9, since the driving is performed by alternating the directions, the clamp 6a is moved when the clamps 6a to 6c are moved.
If you do not raise the pile to the top of the pile P, the left and right holding claws 61
The a and 61b collide with the side surfaces of the immediately preceding piles P1 to P6 and cannot move forward.

Not only the pile punching and pulling machine, but also the clamps of other work devices on the pile were the same as above.

(Problems to be solved by the invention) As described above, in a conventional clamp mechanism such as a work device on a pile, when moving forward on the pile, the device is lifted so that the lower end of the clamp is located above the existing pile. You have to raise it to the upper end. However, the device cannot be sufficiently raised in a place where there is an obstacle above the pile driving site such as under the bridge. Therefore, in the past, the mast was shortened to increase the upper space.

Further, even at a site where there are no obstacles above, a large amount of energy and labor are required to move the clamp up and down, and therefore there is a drawback that the working time becomes long.

Therefore, the present invention does not require a special pile punching machine or the like even at a construction site where there is an obstacle above and does not raise the device high even at a site where there is no obstacle in the sky. It is an object of the present invention to provide a clamp mechanism for a work device on a pile that can move the forward direction.

(Means for Solving Problems) In order to achieve the above object, the clamp mechanism of the pile working device of the present invention fixes the work device on the pile for performing various works on the existing pile on the existing pile. In order to do so, in the clamp mechanism configured on the base of the lower end of the device, each of a pair of pile holding claws forming each clamp is configured to be independently movable, and both ends are provided at the upper ends of the pair of pile holding claws. It is characterized in that a moving mechanism for moving the pile holding claws is fixedly provided in series, and one or both of the pile holding claws can be moved by the moving mechanism in a direction orthogonal to the forward direction of the working device.

(Operation) The work device is arranged on the pile row, the moving mechanism of the pile holding claw is operated, the upper end of the existing pile is held by the holding jaw, and the device is fixed on the pile row to perform the work. When the device is moved, the claws are moved by the moving mechanism to release the pinching state of the claws, and the claws are further moved outward so that the distance between the two claws is larger than the width of the pile. After that, the clamp mechanism is slightly raised and moved forward. In this case, the distance between the two holding claws is larger than the width of the pile, so that the holding claw does not collide with the pile and the clamp mechanism can move forward.

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

FIG. 1 is a front view of the first embodiment, in which a clamp mechanism 6 of the present embodiment is a moving mechanism that is fixed to the first and second holding claws for holding a pile and the upper ends of the both holding claws. It consists of a cylinder 14.

The first holding claw 11 and the second holding claw 12 are slidably fitted to a guide rail 13 provided on the lower surface of the base 2, and are guided by the guide rail 13 so as to be orthogonal to the forward direction of the pile punching machine. It can be moved in any direction.

The movement of the first holding claw 11 and the second holding claw 12 is performed by a moving mechanism, but in the present embodiment, the moving mechanism is
A drive cylinder 14 that uses fluid pressure such as hydraulic pressure provided on the side surface of the guide rail 13 is used. That is, the second end is attached to the tip of the piston rod 15 of the drive cylinder 14.
Since the holding claw 12 is fixed, and the other end of the cylinder 14 is fixed to the first holding claw 11, the sliding of the piston rod 15 causes the first holding claw 11 and the second holding claw 12 to move.
Other than this, as the driving means, a combination of a pinion and a rack can be used.

Further, in the present embodiment, both of the holding claws 11 and 12 are configured to be movable, but a configuration in which either one of the holding claws is fixed to the base 2 can also be adopted. In that case, the holding claw to be fixed can be adjusted in its fixing position according to the size and thickness of the pile P by an adjusting bolt or the like (not shown).

Further, a large number of teeth 16 are formed on each of the facing surfaces of the first gripping claw 11, the second gripping claw 12 and the guide rail 13, and a material having a large friction coefficient is applied to the both sides of the gripping claw 11. Braking means is provided to prevent the pawls 11 and 12 from moving carelessly with respect to the guide rail 13.

The second holding claw 12 has a pair of upper and lower cylinder portions 12a formed therein, and a cylinder 12b is slidably accommodated in the cylinder portion 12a. The tip portion of the piston rod 12c of the cylinder 12b is fixed to the inner portion of the cylinder 12a, and the bottom portion of the cylinder 12b is fixed to the first holding claw 12.
It is located on the side facing the holding claw 11, and a holding body 17 is provided at the bottom of the cylinder 12b.

Two guide rails 13 shown in FIG. 1 and FIG. 2 are arranged in parallel on the lower surface of the base 2, and these two guide rails 1
In FIG. 3, the first holding claw 11 and the second holding claw 12 are arranged so as to sandwich the concave grooves. However, as shown in FIG. 3, the guide rail 13 has a rail shape and the first holding claw 11 has the same shape. The concave groove 18 may be formed on the upper surface of the second holding claw 12.

Next, the operation of the above embodiment will be described.

When the pile P is held, the pile P is positioned between the first holding claw 11 and the second holding claw 12, and the cylinder 14 is operated to bring the first holding claw and the second holding claw 12 close to each other. As a result, the pile P is, as shown in FIG.
Be held in 2. Then, the cylinder 12b provided in the second holding claw 12 is operated to cause the holding body 17 to project from the second holding claw 12 to sufficiently press the pile P against the first holding claw 11 to ensure the held state.

In this state, cargo handling work and pile driving work are performed by the work equipment on piles.

Even if the pile P tries to expand the first and second holding claws 11 and 12 during the work due to the reaction force for the work, the force for the expansion is the same as that of the first and second holding claws 11. (2) Since there is a frictional force between the guide rail 13 and the first holding claw 11 and the second holding claw 11 while being applied to the tip end portion of the second holding claw 12, a self-locking action occurs between them and the first holding claw is generated. The claws 11 and the second holding claws 12 do not open, and the holding state of the pile P can be maintained.

When the pile punching / pulling machine 1 is moved, the cylinder 14 is operated in the opposite manner to the second holding claw 12 and the first holding claw 11.
To be wider than the width of the pile P. At this time, both claws 1
Since a force is applied to the portions 1 and 12 in the vicinity of the contact portion with the guide rail 13, the self-locking action does not occur, and therefore the two holding claws 11 and 12 can be moved smoothly. Further, the cylinder 12b provided on the second holding claw 12 is also operated in the opposite manner to separate the holding body 17 from the first holding claw 11.

In this manner, with the second gripping claw 12 and the first gripping claw 11 being separated from each other, the base 2 is slightly raised and the base 2 is slid while the new driving pile P is being held by the chuck device 5. The piles P immediately in front of the respective clamps 6 are held by moving the piles one pitch forward with respect to No. 3. By repeating this operation, the pile punching / pulling machine 1 advances on the pile.

In this way, even if the pile punching / pulling machine 1 is moved along the pile row, the first and second claws 11 and 12 do not come into contact with the side surfaces of the pile P. At the time of movement, it is not necessary to move the pile punching / pulling machine 1 to a high position. Therefore, the movement time of the device is shortened. Also, holding claw 11,
Since the expansion distance of 12 is freely determined, it is not limited by the thickness of the pile P.

Next, a second embodiment of the present invention will be described with reference to FIGS. 4 and 5.

In this embodiment, the first of the clamp mechanism 6 of the first embodiment described above is used.
Position fixing cylinders 21 and 31 are attached to the inner upper ends of the holding claw 11 and the second holding claw 12. In this embodiment, the cylinders 21 and 31 are reduced during movement of the holding claws 11 and 12 shown in FIG. 4, and the cylinders 21 and 31 are extended in the state of holding the pile P shown in FIG.
The holding claws 11 and 12 are fixed to the base 2 by crimping 1 and 31 onto the surface of the base 2.

According to the present embodiment, it is possible to accurately determine and lock the holding positions of the piles of the holding claws 11 and 12, and to reliably prevent the holding claws 11 and 12 from unintentionally expanding.

The function and effect of other components are the same as those in the first embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

FIG. 6 shows a third embodiment of the present invention. This embodiment has a structure in which the cylinder portion 12a formed inside the second holding claw 12 in the first embodiment is omitted. Therefore, the clamp mechanism in the present embodiment has a cylinder 3 for moving the holding claws, which is formed on the upper ends of both the holding claws 31 and 32.
The pile P is held only by the driving force of 3. As described above, in the present embodiment, since the cylinder portion 12a is not provided, the clamp is small when the pile is held, and the pile punching machine 1 can be made lightweight, which is advantageous for transportation.

Further, the auxiliary cylinder 38 shown in FIG.
It is for moving left and right 32.

Next, a moving device on a pile using the clamp mechanism 6 of the present invention will be described with reference to FIGS. 11 to 13.

The moving device 90 on the pile shown in FIG. 11 and FIG. 12 has a pair of supports 51 having a main clamp 41 at the lower end.
And the supporting body 51 is connected by a slide frame 53. An auxiliary cylinder 43 is provided inside the slide frame 53, and an auxiliary clamp 42 is provided below the auxiliary cylinder 43. The auxiliary clamp 42 is attached to the slide frame 5 by the auxiliary cylinder 43.
Move back and forth along 3.

In the figure, 51a is a cylinder for moving up and down the slide frame 53, and 42a and 51b are cylinders for moving the holding claws of the clamps 42 and 41.

Although FIG. 13 illustrates the case where the crane 91 is mounted on the moving device 90, the present invention is not limited to this, and other working devices such as a shovel and a bucket can be mounted. In addition, in FIGS. 13B to 13F, the crane 91 on the moving device is shown.
Was omitted.

FIG. 13A shows an initial state in which the moving device 90 is fixed on the pile row. From this initial state, the holding state of the auxiliary clamp 42 is released, the holding claws of the auxiliary clamp 42 are opened wider than the width of the pile, and then the auxiliary clamp 42 is slightly raised together with the slide frame 53 to attach the auxiliary clamp 42. The lower end of a certain guide rail 13 is separated from the top end of the pile (see FIG. 13 (b)).

Then, as shown in FIG. 13 (c), the auxiliary clamp 42
Is moved forward to hold new piles P2 and P3, and then the main clamp 41 is slightly raised (see FIG. 13 (d)).

As shown in FIG. 13 (e), the slide frame 53 is moved and the main clamp 41 is moved forward to move the moving device 90 and the working device 91 on the pile. When this movement is completed, the main clamp 41 is lowered and the pile P
Hold 0 and P4 to return to the initial state of FIG. 13 (a).
By repeating this operation, the working device 91 can move forward (or backward) on the existing pile row.

When the forward movement (or the backward movement) is continued from the state shown in FIG. 13 (e), as shown in FIG. 13 (f), the main clamp 41 is not lowered and is separated from the top end of the pile P. If so, the auxiliary clamp 42 is also separated from the top end of the pile P, so that the auxiliary clamp 42 can move immediately by expanding the holding claw.

Further, in the initial state, if the guide rail 13 of the auxiliary clamp 42 is arranged at a position slightly above the top end of the pile P, the working device 91 can be operated only by the vertical movement of the main clamp 41.
Can be moved.

(Effect of the Invention) As described above, according to the clamp mechanism of the pile working device of the present invention, the movement of the pile working device can be performed by slightly raising the pile working device. The work equipment on piles can also be used for work in places where obstacles exist above bridges, for example. Therefore, the working time can be shortened, the construction cost can be reduced, and efficient and safe moving work can be performed.

Also, when moving on the pile, it is not limited by the thickness of the pile,
Since the clamps can be moved on both sides of the existing pile without moving the base or the like upwardly, it is possible to move on the pile in a more stable state.

[Brief description of drawings]

The drawings show an embodiment of the present invention and are shown in FIGS.
The drawing is a partial sectional front view of the clamp mechanism of the first embodiment,
The drawing is a side view showing another example of the guide rail, and FIGS. 4 and 5 are partial cross-sectional front views of the clamp mechanism of the second embodiment.
FIG. 6 and FIG. 7 are front views of the third embodiment, FIG. 8 is a side view for explaining the operation of moving on the pile by taking a pile punching machine as an example of the pile working device, and FIG. A plan view showing an arrangement state of U-shaped steel sheet piles, FIG. 10 is a front view of a conventional clamp, FIG. 11 is a partially cutaway front view of a moving mechanism on a pile, and FIG. 12 is the same plan view and FIG. The figure is an explanatory view for explaining the movement operation on the pile of the movement mechanism. 1 ... Pile work device, 2 ... Base 5 ... Chuck device, 6 ... Clamping mechanism 11 ... 1st holding claw, 12 ... 2nd holding claw 13 ... Guide rail, P ... Pile

Claims (1)

[Scope of utility model registration request] 1. A pair of pile clamps for forming each clamp in a clamp mechanism formed on a base at the lower end of the device for fixing a work device on the pile for performing various works on the existing pile to the existing pile. Each of the claws is configured to be independently movable, and both ends are fixed to the upper ends of the pair of pile holding claws, and a moving mechanism for moving the pile holding claws is continuously provided. Alternatively, both of them can be moved in a direction orthogonal to the forward direction of the work device, a clamp mechanism for a pile work device.