JP6649759B2 - Pile press machine - Google Patents

Description

  The present invention relates to a pile press-fitting machine that presses a pile into the ground.

Conventionally, a clamp device that grips the upper end of an existing pile pressed into the ground, a chuck device that has an opening through which the pile is inserted, and that presses the side surface of the pile inserted through the opening from outside to grip the pile. And a lifting drive device for vertically driving the chuck device with respect to the clamp device.
In this pile press-in machine, a pile gripped by a chuck device is pressed into a position adjacent to an existing pile gripped by a clamp device, and a pile row can be constructed on the ground.
This clamp device is provided with a plurality of piles in which the gripping directions for pressing the piles are parallel to each other, and grips each pile in the pile row. When gripping a non-circular pile such as a steel sheet pile, the grippable direction is limited to the pile thickness direction, etc.If the pile row is straight, the grippable direction is constant, so the clamping device is Each pile can be gripped smoothly.
However, when constructing a pile row having a predetermined curvature, such as when the entire pile row has an arc shape as in the case of constructing the surrounding wall of a circular pit with a pile row, the direction in which each pile can be gripped is the curvature. It changes radially. In this case, when the pile is gripped by the clamp device in which the gripping directions are parallel to each other, the upper end of the pile is deformed, or the gripping force is not uniform and insufficient, so the gripping is not reliable, and the press-fitting accuracy of the pile is reduced. There are problems such as lowering.

As a technique for solving such a problem, Patent Literature 1 discloses that a pressing surface having a shape corresponding to the curvature of a pile row to be constructed is formed on a clamp claw, and this clamp claw is detachably attached to a clamp body. A featured clamping device is disclosed.
Further, Patent Document 2 discloses that at least the first and third leading steel sheet piles on the tip side of the leading steel sheet piles that are continuously installed in an arc shape are tangential to the second leading steel sheet pile on the tip side. And an adjustment attachment plate having a taper portion having a taper angle corresponding to an intersection angle of the tip side first or third tip side steel sheet pile with a tangential direction of the tip side first and third tip side leading steel sheets. With the clamps of the self-propelled movable press-fitting device interposed between the front and back gripping surfaces of the sheet pile, the upper ends of the first and third leading steel sheet piles are gripped, and A method of circularly placing a steel sheet pile into the ground by press-fitting the sheet pile is disclosed.
When the pressing surface inclined so as to be parallel to the pressed surface of the pile is configured as in Patent Documents 1 and 2, the existing pile can be gripped without being deformed.

JP-A-8-74255 JP 2012-102521 A

However, in the technology described in Patent Document 1, the pressing surface of the clamp claw is inclined with respect to the gripping direction (the direction in which the clamp cylinder expands and contracts, and the direction in which the movable claw moves). However, there is a problem that a sufficient gripping force cannot be exerted against the
In the technique described in Patent Literature 2, since the clamp is held by the clamp device via the adjustment attachment plate attached to the steel sheet pile, there is a problem in that the grip of the steel sheet pile is not as reliable as in the case of directly gripping the sheet pile with the clamp device. There is.

  The present invention has been made in view of the above problems in the related art, and in a pile press-in machine that holds a curved pile row with a plurality of clamping devices, without deforming the pile, the pile row is straight. It is an object of the present invention to efficiently exert a uniform and sufficient gripping force and securely grip each pile as in a certain case.

The invention according to claim 1 for solving the above-mentioned problem is provided with a clamp device movably mounted on a rail formed on the lower surface of the saddle and attached to the rail, and an existing pile pressed into the ground. A pile press-fitting machine that grips an upper end portion with the clamp device, grips a new pile on a chuck device supported on the saddle via a lifting drive device, and press-fits this into the ground,
A plurality of sets each including the rail and the clamp device attached thereto are arranged in the front-rear direction of the saddle,
A pile press-in machine in which one rail and at least one other rail have inclined angles that are angularly displaced from parallel with each other within a lower surface of the saddle.

The invention according to claim 2 is according to claim 1, wherein three or more sets of the rail and the clamp device attached to the rail are provided in a line in the front-rear direction of the saddle and include two rails parallel to each other. Pile press machine.

  According to a third aspect of the present invention, the inclined surface is inclined in the lower surface of the saddle with respect to the pressing surface of the clamping device attached to one of the two parallel rails and the pressing surface of the clamping device attached to the other. The pile press-in machine according to claim 2 having a surface.

  The invention according to claim 4 is the pile press-in machine according to any one of claims 1 to 3, wherein a gripping direction of each of the clamp devices is a direction parallel to the rail to be attached.

  According to a fifth aspect of the present invention, when a straight line perpendicular to the pressing surface of each of the portions having different angles is imagined for each of the pressing surfaces of the plurality of clamp devices, all the straight lines intersect at substantially the same point. A pile press-in machine according to any one of claims 1 to 4.

In the invention according to claim 6 , four or more sets of the rail and the clamp device attached to the rail are provided in a line in the front-rear direction of the saddle,
The rail includes a first rail, a second rail, a third rail, and a fourth rail in order from a front end to a rear end of the saddle;
The first rail and the second rail are parallel to each other within a lower surface of the saddle;
The second rail and the third rail have inclined angles that are angularly displaced from parallel to each other within the lower surface of the saddle,
The pile press-in machine according to any one of claims 1 to 5, wherein the third rail and the fourth rail are parallel to each other within a lower surface of the saddle.

  According to the pile press-in machine of the present invention, a clamp device is attached to each of at least two rails having inclination angles displaced from parallel to each other within the lower surface of the saddle, and if a similar clamp device is attached, Since the gripping directions are not parallel to each other according to the inclination angle, when gripping a pile row having a curvature with a plurality of clamp devices, each gripping direction is directed to the radius of curvature of the pile row. Thus, without deforming the piles, a uniform and sufficient gripping force can be efficiently exhibited as in the case where the pile rows are linear, and each pile can be reliably gripped.

It is a right side view (a) and a front view (b) of a pile press-in machine concerning one embodiment of the present invention. It is a vertical looking down arrangement view of the pile press-in machine concerning one embodiment of the present invention. FIG. 2 is a right side view (a) of a saddle of the pile press-fitting machine according to one embodiment of the present invention, and an A-view taken along an arrow.

  An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

As shown in FIG. 1, the pile press-in / pull-out machine 1 of the present embodiment includes a saddle 10, a clamp device 21-24 provided below the saddle 10, and a slide base 31 provided on the saddle 10 so as to be able to move back and forth. A mast 32 erected on a slide base 31 so as to be pivotable, a lifting cylinder device 33, and a chuck device 34 supported by the mast 32 via the lifting cylinder device 33.
As the clamping device, a first clamping device 21, a second clamping device 22, a third clamping device 23, and a fourth clamping device 24 are provided from the top.
As shown in FIG. 2, a steel sheet pile having a hat-shaped cross section (particularly, a zero sheet pile having a projecting amount outside the joint part of zero) is applied as the pile.
As shown in FIG. 1A and FIG. 2, the rearmost fourth clamping device 24 grips the web portion of the steel sheet pile P1. From the steel sheet pile P1, the steel sheet pile P2, the steel sheet pile P3, the steel sheet pile P4,... The steel sheet pile P1, the steel sheet pile P2, the steel sheet pile P3, and the steel sheet pile P4 are press-fitted in this order.
Now, in the state of FIG. 2 (a), three steel sheet piles P1-P3 are existing piles already pressed into the ground, the upper end of which is gripped by the clamp devices 21-24, and the steel sheet pile P4 is held by the chuck device 34. This is a pile to be pressed and pressed into the ground. In addition, the pile press-in / pull-out machine 1 has a joint portion on the side of the steel sheet pile gripped by the chuck device 34 (joint portion of P4 and P3 in FIG. 2A, joint portion of P5 and P4 in FIG. 2B). , The relative angle of the steel sheet piles connected can be controlled in accordance with the curvature of the arc-shaped pile row to be constructed.
In the state of FIG. 2 (b), four steel sheet piles P1-P4 are existing piles already pressed into the ground, and three steel sheet piles P1-P3 are gripped by the clamp device 21-24, and one sheet pile is skipped. The steel sheet pile P5 is gripped by the chuck device 34 to be a press-fit target pile.
In any case, the fourth clamp device 24 grips the web portion of the steel sheet pile P1, the third clamp device 23 grips the arm portion of the steel sheet pile P1 and the arm portion of the steel sheet pile P2, and holds the arm portion of the steel sheet pile P2. The second clamp device 22 grips the arm of the steel sheet pile P3, and the first clamp device 21 grips the web portion of the steel sheet pile P3. In such a gripping state, the pile press-in and pull-out machine 1 runs on the pile row by itself.

As shown in FIG. 3, four rails 41-44 are formed on the lower surface of the saddle 10. Each of the rails 41-44 has a groove shape cut from the left side surface to the right side surface of the saddle 10, and a hook f holding the clamp device near the lower end openings of both inner surfaces so as not to drop the clamp device is provided inside the groove. It is a shape protruding toward.
The four rails 41-44 are referred to as a first rail 41, a second rail 42, a third rail 43, and a fourth rail 44 from the front end 10F of the saddle 10 to the rear end 10R.
The first clamp device 21 is movably attached to the first rail 41 along the first rail 41. The second clamp device 22 is movably attached to the second rail 42 along the second rail 42. The third clamp device 23 is movably attached to the third rail 43 along the third rail 43. The fourth clamp device 24 is movably attached to the fourth rail 44 along the fourth rail 44.
As described above, a plurality of sets each including the rails 41-44 and the clamp devices 21-24 attached to the rails 41-44 are provided in the front-rear direction of the saddle 10. In the present embodiment, there are the above four sets.

2 and 3 show central axes 21a, 22a, 23a and 24a in the longitudinal direction (guide direction) of each rail.
As shown in FIGS. 2 and 3, the first rail 41 and the second rail 42 are parallel to each other within the lower surface of the saddle 10. The second rail 42 and the third rail 43 have an inclination angle α that is angularly displaced from parallel with each other in the lower surface of the saddle 10. The third rail 43 and the fourth rail 44 are parallel to each other within the lower surface of the saddle 10.
Thus, one rail and the other rail have an inclination angle α that is angularly displaced from parallel to each other within the lower surface of the saddle 10. In this embodiment, the first rail 41 and the third rail 43, the first rail 41 and the fourth rail 44, the second rail 42 and the third rail 43, and the second rail 42 and the fourth rail 44 are mutually inclined. Has an angle α. The angular displacement within the lower surface of the saddle 10 refers to a rotational angular displacement about an axis perpendicular to the lower surface of the saddle 10. The four rails 41-44 are parallel to the lower surface of the saddle 10 and are at the same vertical position.
It also includes two rails parallel to each other. In the present embodiment, the first rail 41 and the second rail 42, and the third rail 43 and the fourth rail 44 are parallel to each other.

The pressing surface 21b of the first clamp device 21 is parallel to one surface because the pressing surface 21b grips the web portion of the steel sheet pile P3. The front pressing surface 22b of the second clamp device 22 grips the arm portion of the steel sheet pile P3 (parallel to the web portion of the steel sheet pile P3), and is therefore parallel to the pressing surface 21b of the first clamp device 21. Since the rear side pressing surface 22c of the second clamp device 22 grips the arm of the steel sheet pile P2 (parallel to the web portion of the steel sheet pile P2), the front pressing surface 22b by the angle difference between the steel sheet pile P2 and the steel sheet pile P3. Is formed in the lower surface of the saddle 10.
On the other hand, since the pressing surface 24b of the fourth clamp device 24 grips the web portion of the steel sheet pile P1, it is parallel to one surface and is inclined by the inclination angle α with respect to the pressing surface 21b of the first clamp device 21. . The inclination angle α corresponds to the angle difference between the steel sheet pile P1 and the steel sheet pile P3.
The rear pressing surface 23b of the third clamp device 23 grips the arm of the steel sheet pile P1 (parallel to the web portion of the steel sheet pile P1), and is therefore parallel to the pressing surface 24b of the fourth clamp device 24. The front-side pressing surface 23c of the third clamp device 22 grips the arm portion of the steel sheet pile P2 (parallel to the web portion of the steel sheet pile P2), and therefore, the rear-side pressing surface 23b by the angle difference between the steel sheet pile P1 and the steel sheet pile P2. Is formed in the lower surface of the saddle 10.
Clamp claws (opposing movable claws and fixed claws) forming the above-mentioned pressing surface are mounted on each clamp device.

The gripping direction of each of the clamp devices 21-24, that is, the direction in which the clamp cylinder expands and contracts, or in other words, the direction in which the pressing surface on the movable claw side moves, is a direction parallel to the rail to be mounted.
The rear pressing surface 22c of the second clamping device 22 and the front pressing surface 23c of the third clamping device 22 are inclined with respect to the gripping direction, and the other pressing surfaces 21b, 22b, 23b, 24b are gripped. Perpendicular to the direction.
Therefore, all the clamping devices have a pressing surface perpendicular to the gripping direction, and the clamping direction of the clamping device can be made perpendicular to the pressed surface of the steel sheet pile, so that the loss of the pressing load can be reduced.
As described above, without deforming the steel sheet piles P1-P3, it is possible to efficiently exert a sufficient gripping force and securely grip the steel sheet piles P1-P3.

In the pile press-in / pull-out machine 1, in order to enable construction of an arc-shaped pile array, as shown in FIG. When a straight line perpendicular to the plane is assumed, all the straight lines intersect at substantially the same point. In the present embodiment, a straight line for the pressing surfaces 21b and 22b, a straight line for the pressing surfaces 22c and 23c, and a straight line for the pressing surfaces 23b and 24b are assumed as “straight lines perpendicular to the pressing surfaces of the portions at different angles”. can do. The straight lines intersect at substantially the same point if the reference line is determined to be equal, such as the center line of the “pressing surface for each portion having a different angle”.
The pile press-in / pull-out machine 1 can efficiently construct a circular pile continuous wall having a constant curvature, as in the case of constructing a peripheral wall of a circular pit with a pile row.

  The pile press-in / pull-out machine 1 of the above embodiment may be replaced with the fourth clamp device 24 so as to grip the web portion of the steel sheet pile P2. In that case, the rail is formed perpendicular to the web portion of the steel sheet pile P2.

Regardless of the above-described embodiment, the rails may not be parallel to each other but may be configured such that any two rails have an inclination angle. For example, when each steel sheet pile is gripped by each clamping device, each rail is formed by providing an inclination angle corresponding to the sheet pile displacement angle between adjacent rails.
The following description is based on the pile press-in / pull-out machine 1 of the above embodiment. That is, the second clamp device 22, the second rail 42, the third clamp device 23, and the third rail 43 are removed from the pile press-in / pull-out machine 1 of the above embodiment, and the first clamp device 21, the first rail 41, the fourth clamp device 24 and the fourth rail 44 alone. In that case, the fourth clamp device 24 may be rearranged and implemented so as to grip the web portion of the steel sheet pile P2. Also in this case, the rail is formed perpendicular to the web portion of the steel sheet pile P2. On the other hand, a clamp device (original fourth clamp device) for gripping the web portion of the steel sheet pile P1 is attached to a rail (original fourth rail) provided with an inclination angle with respect to an adjacent rail. You may. These configurations are also effective in the case of a U-shaped sheet pile without arms.

Reference Signs List 1 pile press-in / pull-out machine 10 saddle 21 first clamping device 21b pressing surface 22 second clamping device 22b front pressing surface 22c rear pressing surface 23 third clamping device 23b rear pressing surface 23c front pressing surface 24 fourth clamping device 24b Pressing surface 31 Slide base 32 Mast 33 Lifting cylinder device 34 Chuck device 41 First rail 42 Second rail 43 Third rail 44 Fourth rail P1 Steel sheet pile P2 Steel sheet pile P3 Steel sheet pile P4 Steel sheet pile P5 Steel sheet pile α Tilt angle

Claims (6)

A clamp device is provided movably along a rail formed on the lower surface of the saddle and attached to the rail. The upper end of an existing pile press-fitted into the ground is gripped by the clamp device and moved up and down on the saddle. A pile press-in machine for gripping a new pile in the chuck device supported through the device and pressing it into the ground,
A plurality of sets each including the rail and the clamp device attached thereto are arranged in the front-rear direction of the saddle,
A pile press-in machine, wherein one rail and at least one other rail have inclination angles displaced from parallel with each other within a lower surface of the saddle. A set of the rail and the clamp device attached to the rail is provided in three or more sets side by side in the front-rear direction of the saddle,
The pile press-in machine according to claim 1, including two rails parallel to each other.   3. The pressing surface of the clamping device attached to one of the two parallel rails has an inclined surface inclined in the lower surface of the saddle with respect to the pressing surface of the clamping device attached to the other. Pile press machine.   The pile press-in machine according to any one of claims 1 to 3, wherein a gripping direction of each of the clamp devices is a direction parallel to the rail to be attached.   The method according to any one of claims 1 to 4, wherein when a straight line perpendicular to the pressing surface of each of the portions having different angles is imagined for each of the pressing surfaces of the plurality of sets of clamp devices, all the straight lines intersect at substantially the same point. The pile press-in machine according to item (1). Four or more sets of the rail and the clamp device attached to the rail are provided side by side in the front-rear direction of the saddle,
The rail includes a first rail, a second rail, a third rail, and a fourth rail in order from a front end to a rear end of the saddle;
The first rail and the second rail are parallel to each other within a lower surface of the saddle;
The second rail and the third rail have inclined angles that are angularly displaced from parallel to each other within the lower surface of the saddle,
The pile press-in machine according to any one of claims 1 to 5, wherein the third rail and the fourth rail are parallel to each other within a lower surface of the saddle.

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