JPS6330451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pile press-in machine, and more particularly to a pile press-in machine that simultaneously excavates an earth auger when press-fitting piles.

Conventional technology and its problems Conventionally, it has been known to press a pile into the ground and dig an earth auger along the pile. It is advantageous that press-in, ie, erection of piles by hydraulically applying a static load, can be carried out even on relatively hard ground.

When press-fitting a pile while simultaneously excavating an earth auger, it is desirable to press-in the pile first, followed by digging the earth auger, in order to press-fit the pile into the ground as tightly as possible. Sometimes there is a hard ground that makes it difficult to press in the pile in advance, and in such cases, it is a good idea to excavate the hard ground with the earth auger first, and once it passes the hard ground, the pile can be pressed in. It is better to return to the preceding. However, to date, no pile press-in machine has been developed that can perform earth auger digging and pile press-in simultaneously, which can easily do this.

Incidentally, in conventionally known pile press-in machines of this type, in order to dig the earth auger and press-in the pile at the same time, the gripping means that grips the casing of the earth auger and the pile when released, It consists of a chuck which releases the piles together and which, when closed, grips the casing of the earth auger and the pile together, according to which, in practical terms, the lower end of the pile precedes the earth auger. In other words, the pile press-in is carried out first, or the lower end of the pile follows, that is, the earth auger excavation precedes, and the earth auger excavation and pile press-in can only be carried out at the same time by grasping the earth auger casing and the pile. . In addition, in conventional methods, a leader with a height equivalent to the length of the pile was set up on a base machine similar to that used in construction machinery such as a power shovel to lower the earth auger while simultaneously digging the earth auger and press-fitting the pile. Since the pile press-in machine relies on guidance from this, a large space commensurate with the height of the leader is required to move the pile press-in machine, and it is not suitable for places with narrow vertical spaces such as under elevated tracks, under bridges, and under power transmission and telephone cables. It is impossible or extremely difficult to bring in a pile press-in machine. That is, in such a place, there is a restriction that, as a practical matter, it is not possible to perform earth auger excavation and pile press-in at the same time by adding short screw augers and piles.

Therefore, the present invention allows earth auger excavation and pile press-in to be carried out simultaneously by easily changing from pile press-in precedence to earth auger excavation precedence, or from earth auger excavation precedence to pile press-in precedence, as needed. A pile press-in machine that can perform both excavation and pile press-in without requiring a high leader, and is therefore guaranteed to perform earth auger excavation and pile press-in at the same time even in places with narrow vertical spaces such as those mentioned above. The aim is to provide the following.

Means for Solving the Problems The pile press-in machine of the present invention includes a clamp that grips piles built side by side on the ground, and a relative vertical drive and a clamp that is arranged adjacent to the clamp and holds the piles. A movable gripping member facing each other, comprising a chuck capable of relative back-and-forth movement of one pile or more in the parallel direction, the chuck grips the casing of the earth auger and the piles arranged thereon from both sides; and a fixed gripping member that grips the casing of the earth auger under the loosening of one of the movable gripping members, cooperating with the tightening movable gripping member upon tightening of the other movable gripping member.

Operation According to the present invention, the pile press-in machine grasps the already built pile with its clamp to make it stand on its own, the casing of the earth auger and the pile are lined up, and the chuck is grasped by the opposing movable gripping members of the chuck, and the chuck is clamped to the clamp. On the other hand, the pile can be pressed into the ground by pressing it down by an appropriate means, such as hydraulic drive, and at the same time, the earth auger can be rotated to perform drilling, that is, digging. After one downward movement of the chuck, the movable gripping member of the chuck is then opened to release the casing and pile of the earth auger, the chuck is raised, and the casing and pile of the earth auger are removed again by the movable grip of the chuck. By repeating the action of grasping with the members and pushing down the chuck, it is possible to press-fit the pile to the required depth.

In the above-mentioned simultaneous earth auger excavation and pile press-in construction, in order to switch from pile press-in precedence to earth auger excavation precedence, loosen the movable gripping member on the required side to release the pile, and tighten the other movable gripping member. Then, grip the casing of the earth auger with the latter gripping member and the fixed gripping member, and leave the casing alone gripped.
The chuck is pressed down against the clamp in parallel with the earth auger's hole, the lower end of the earth auger is brought below the lower end of the pile, the casing of the earth auger and the pile are tightened with the loosened movable gripping member, and the casing and The purpose is achieved by grasping the pile again, and from this earth auger advance state, when the chuck rises, the chuck's movable gripping member releases the pile, and the earth auger's casing is brought into a state of independent grip, and the earth auger is moved so that its lower end is the pile. By lifting the chuck so that it is positioned above the lower end and using the chuck again to grip the earth auger casing and the pile, it returns to the form of pile press-in first and earth auger excavation following. These changes can be easily made by opening and closing the movable gripping member of the chuck. Therefore, according to the present invention, earth auger excavation and pile press-in can be carried out simultaneously by easily switching from pile press-in precedence to earth auger excavation precedence, or from earth auger excavation precedence to pile press-in precedence, as needed. be able to.

Furthermore, in the present invention, opening of the gripping member,
Since earth auger excavation and pile press-in are performed by repeatedly driving the chuck up and down against the clamp with closing, the work to the required depth of the pile can be performed without using a high leader as in the past. Even in places with narrow vertical spaces, such as under elevated tracks, under bridges, and under power transmission and telephone cables, it is guaranteed that earth auger excavation and pile press-in can be carried out simultaneously by using appropriately short earth augers and piles.

In the present invention, after the pile is press-fitted, in order to pull out the earth auger that has dug in parallel with the press-fitting, the movable gripping member on the required side of the chuck is loosened, the pile remains released, and the movable gripping member on the other side is pulled out. Grasp the casing of the earth auger with the fixed gripping member, lift the chuck against the clamp, open the latter gripping member to lower the chuck, grasp the casing of the earth auger again and lift the chuck, and repeat this operation repeatedly. Bye. That is, according to the gripping member in the chuck of the present invention, the chuck vertical movement guide system of the pile press-in machine can also be used as a guide, that is, a leader, for the earth auger, and it is possible to perform pile press-in and earth auger excavation simultaneously. This can be achieved using a device with a simple structure.

In the present invention, when a certain pile is press-fitted by pressing down the chuck of the pile press-in machine as described above, after the earth auger is pulled out from the ground, the clamp continues to grip the already parallel pile, and when the gripping member is released. Raise the chuck above the pile that has been press-fitted, and move the chuck to the required side by one pile pitch in the direction of paralleling the piles (at this time, if desired, move the chuck to the required movable gripping member and fixed gripping member). (the earth auger can be gripped by its casing and accompanied by the movement of the chuck), and at the moved position the gripping member of the chuck grips the casing of the earth auger and the new pile, and the chuck is pressed down against the clamp. Then, the pile is pre-pressed into the ground to a depth that can be supported by a pile press-in machine,
Using the new press-fitted pile and the casing of the earth auger as supports, open and lift the clamp, move the clamp to the side of the chuck and lower it,
Grasp the existing parallel piles again and press-in the new piles by moving the pile press-in machine one pitch above the parallel piles in the ground to the side required for press-fitting the new piles. It can be stepped or moved by itself. In this case, the clamp and the chuck are adjacent to each other in the parallel direction of the pile, so that when the pile press-in machine is lifted during the lifting step, the earth auger, which forms part of the support for the lift, has a lateral Although a load is applied, the pile held in the chuck along with the earth auger casing acts as a reinforcing material, so the earth auger does not deform, and the parallel combination of the earth auger casing and pile acts as a support. Therefore, a sufficiently large stacking property can be obtained, and the pile press-in machine can be stepped steadily.

In the present invention, in order to pull out a pile from the ground while the earth auger is pulled out, the pile to be pulled out and an adapter with an appropriate external shape are lined up and grasped by the movable gripping member of the chuck, and the movable gripping member is opened and closed. The goal is achieved by repeatedly moving the chuck up and down with .

Effects of the Invention As described above, according to the present invention, earth auger excavation and pile press-in can be carried out simultaneously by switching from pile press-in precedence to earth auger excavation precedence, or from earth auger excavation precedence to pile press-in precedence, as needed. In addition, earth auger excavation and pile press-in can be carried out simultaneously without requiring a high leader. Therefore, earth auger excavation and pile press-in can be carried out at the same time even in places with narrow vertical spaces. It is possible to provide a pile press-in machine that is guaranteed to run in parallel, and the chuck vertical movement guide system of the pile press-in machine can also be used as a guide, that is, a leader, for the earth auger, and the pile press-in machine and the earth auger excavation can be performed in parallel. Simultaneous construction can be achieved with a device of simple structure.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the figure, 1 is a plurality of clamps that grip the piles A that are lined up on the ground, 2 is a saddle equipped with the clamps 1, 3 is a slide base mounted on the saddle 2, and 4 is a plurality of clamps installed on the slide base 3. 5 is an elevating body mounted on the mast 4; 6 is a chuck attached to the elevating body 5 adjacent to the side of the pile to be pressed into the parallel body of the clamp 1 (on the right side in FIG. 1); In Fig. 1, the clamp 1 has a combination structure of a fixed gripping member facing the front and back sides of the drawing and a gripping member that can be moved back and forth in the opposite directions by hydraulic drive. It has movable gripping members 7, 8 and fixed gripping members 9 which can be driven to move back and forth in opposite directions.

The slide base 3 can be moved relative back and forth between it and the saddle 2 by more than one pile pitch in the parallel direction of the piles a, and the mast 4 can be rotated horizontally on the slide base 3. , the elevating body 5 can be driven up and down with respect to the mast 4. That is, in the illustrated pile press-in machine, the chuck 6 is a combination of the saddle 2, the slide base 3, and the mast 4 of the clamp 1, in other words, it can be driven vertically relative to the clamp 1, and The chuck 6 includes the elevating body 5, the mast 4, and the slide base 3.
In other words, it is possible to substantially move the saddle 2 of the clamp 1 in the parallel direction (subordinate direction) of the pile a by more than one pile pitch between the saddle 2 of the clamp 1 and the clamp 1. Furthermore, the chuck 6 can be rotated on the lifting body 5 in a direction around a vertical axis. Clamp 1 on chuck 6
Hydraulic drive to drive vertically relative to
For example, a method using a hydraulic cylinder plunger device 10 whose one end is connected to the mast 4 and the other end is connected to the elevating body 5 may be applied, and the clamp 1
Relative back-and-forth driving in the vertical direction between the chuck 6 and the chuck 6 may be performed by a similar device (not shown), and the rotation of the mast 4 and the chuck 6 may be performed by a similar device or a hydraulic motor (not shown). ).

11 is a pile 12 and a casing 13 to be press-fitted
movable gripping member 7 of the chuck 6,
The earth auger is gripped from both sides of the earth auger, and a lug 14 is fixed to the casing 13 of the earth auger, extending in the length direction gripped by one of the movable gripping members 7, 8 and the fixed gripping member 9. There is. The earth auger 11 has a hydraulic motor 16 connected to the auger screw 15 to rotate it, and a hydraulic cylinder/plunger device 17 that drives the combination of the auger screw 15 and the hydraulic motor 16 up and down with respect to the earth auger casing 13. has.

Grasp the already parallel built pile a with clamp 1,
A pile press-fitting machine is made to stand on the pile a, and an earth auger 11 is installed on the side adjacent to the pile a.
The casing 13 and the press-fit pile 12 are lined up and gripped by the movable gripping members 7 and 8 of the chuck 6 (see FIG. 1, however, the pile 12 is shown in FIG. 1 for convenience).
It is shown rotated 90° around the vertical axis. ), clamp 1 using pile a as a reaction anchor
(At this time, if necessary, the auger screw 1 of the earth auger 11 is pressed down by the hydraulic cylinder plunger device 17.)
The pile 12 is press-fitted into the ground, and the earth auger 11 is driven by the hydraulic motor 16 to dig. When the chuck 6 is pressed down against the clamp 1 at a predetermined rate,
Stop pressing down, open the gripping members 7 and 8 of the chuck 6, release the grip on the earth auger 11 and the pile 12, raise the chuck 6 to the required height, and in the raised position again hold the earth auger casing 13 and The pile 12 is grasped and the chuck 6 is pushed down again under the action of the earth auger 11, and this operation is repeated to press the pile 12 into the ground to the required depth.

In the simultaneous construction of the earth auger 11 excavation and pile press-in using the pile press-in machine of the present invention, the pile press-in is generally carried out first, followed by the earth auger 11 excavation. If there is hard ground on the way that makes it difficult to advance the pile press-in, keep the ground auger casing 13 gripped by the movable gripping member 8 and fixed gripping member 9 of the chuck 6,
The pile 12 is opened and released by the movable gripping member 7, the chuck 6 is pushed down against the clamp 1, and the earth auger 11 excavates at the same time, and when the lower end of the earth auger 11 is positioned below the lower end of the pile 12. , by also closing the movable gripping member 7, gripping the earth auger casing 13 and the pile 12, and pushing down the chuck 6.
The pile can be press-fitted into the hard ground by the advance digging of the earth auger 11.

When it is no longer necessary to advance the digging of the earth auger 11 or to perform subsequent pile press-fitting, when the chuck 6 is raised, the movable gripping members 7 and 8 and the fixed gripping member 14 of the chuck 6 are moved to release the pile 12 and grip the earth auger casing 13. By positioning the lower end of the earth auger 11 above the lower end of the pile 12 and gripping the earth auger casing 13 and the pile 12 again with the movable gripping members 7 and 8, it is possible to restart the preceding pile press-in and subsequent earth auger digging. Return to state.

When the pile 12 is press-fitted to the required depth,
The movable gripping member 7 of the chuck 6 is opened to keep the pile 12 free, the movable gripping member 8 and the fixed gripping member 9 grip the earth auger casing 13 and the chuck 6 is lifted against the clamp 1, the movable gripping member 8 and With the fixed gripping member 9 released, the chuck 6 is lowered, the movable gripping member 8 and the fixed gripping member 9 grip the earth auger casing 13 again, and the chuck 6 is raised.
Pull out 1.

After that, while the already parallel pile a is gripped by the clamp 1, and the chuck 6 is released, it is raised to a height where it cannot be attached to the pile that has been press-fitted, using the pile a as a support, and as shown in FIG. to the right of pile a
Move the chuck 6 relative to the clamp 1 by one pitch of the pile to the required side in the parallel direction (at this time, if desired, grip the casing 12 with the movable gripping member 8 and the fixed gripping member 9 and release the earth auger. 11 by the chuck 6), at the moved position, if necessary, rotate the chuck 6 180 degrees in the direction around the vertical axis, line up the casing 13 of the earth auger 11 with the new press-fit pile, and chuck the earth auger 11. 6 movable gripping members 7, 8
, press down the chuck 6 to pre-press fit the new pile into the ground to a depth sufficient to support the pile press-in machine in a suspended manner, open the clamp 1, and place the pile press-in machine into the ground auger casing 1.
3 and the preliminary press-fit pile, and under that condition, raise the clamp 1 to a height where it cannot touch the already parallel built pile a, and then press the chuck 6.
Place clamp 1 on the side of the pile for one pitch of the pile.
After it is brought together, it is lowered to the location of the already parallel built pile a, and the pile a is grasped again. In other words, through these series of operations, the pile press-in machine needs to press in new piles on top of the piles that have already been laid in parallel on the ground.
Perform the pitch steps.

By repeatedly repeating the above-mentioned pile press-fitting and the steps of the pile press-fitting machine, new piles can be press-fitted one after another in parallel.

In order to remove parallel press-fit piles from the ground using the above-mentioned pile press-in machine of the present invention, an adapter (not shown) having a cross-sectional shape similar to the casing 13 of the earth auger 11 is used in place of the earth auger 11, and the pile is chucked together with the pile. 6 movable gripping member 7,
You can grab it at 8. The operation for pulling out the pile may be performed in the reverse direction of the pile press-in operation described above.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the present invention, Fig. 2 is a front view showing one embodiment of the present invention;
The figure is an enlarged cross-sectional view of the chuck portion thereof, and FIG. 3 is a cross-sectional view taken along the line of FIG. 2. a is a parallel built-in pile, 1 is a clamp, 2 is a saddle, 3 is a slide base, 4 is a mast, 5 is a rising body, 6 is a chuck, 7 and 8 are movable grip members, 9 is a fixed grip member, 10 is Hydraulic cylinder plunger device, 11 is earth auger,
12 is the press-fit pile, 13 is the earth auger casing, and 14 is the lug.

Claims (1)

[Claims] 1 A clamp that grips piles that are placed side by side on the ground, and a clamp that is placed adjacent to the clamp and is connected to the clamp with relative vertical movement and relative back and forth movement of one pile or more in the pile paralleling direction. The chuck has a movable chuck that can be driven, and the chuck engages the casing of the earth auger and the pile arranged thereon and grips them from both sides. A pile press-in machine comprising a fixed gripping member that grips a casing of an earth auger in cooperation with the movable clamping member when the movable gripping member is tightened.