JPH0211694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ready-made pile press-in device for press-fitting and burying a ready-made pile into the ground. More specifically, a plurality of guide poles are erected around the periphery of a reaction force holder that is mounted and fixed on an existing pile, and a hydraulic jack for press-fitting is fixed to the upper end of the guide pole in a vertical direction. A holder is fitted onto the guide pole so as to be movable up and down, the holder is connected to the hydraulic jack, and the holder is configured to be moved up and down by the hydraulic jack along the guide pole; This invention relates to a press-fitting device for ready-made piles, in which a chucking device for holding the ready-made piles in a standing position is attached to the holder.

This type of press-in device allows the existing pile to receive the press-in reaction force, so it is possible to press-in the pile with a considerably large press-in force. However, if the ground is hard, such a reaction force receiver alone is insufficient, and it is conceivable to use the weight of a crane truck or the like as a reaction force receiver.

Conventionally, for this reason, the guide pole and the leader of the crane vehicle were fixed so that they could not move up and down. Therefore, when the work is completed and the press-in device is moved to the next buried position, it is necessary to swing the leader relative to the crane vehicle and lift the press-in device above the existing pile. In other words, in order to cause the press-fitting reaction force to be applied to the press-fitting device by the crane truck as well, the use of the press-fitting device is limited in that a crane truck with a swinging leader must be used.

The present invention aims to solve the above-mentioned problems in the prior art, and the reader does not oscillate.
The purpose of the present invention is to provide a press-fitting device for ready-made piles that can smoothly move the press-fitting device even on a three-point support type crane vehicle and can receive a good reaction force.

In order to achieve the above object, the present invention includes a plurality of guide poles erected around the circumference of a reaction force pedestal that is mounted and fixed on an existing pile, and a hydraulic jack for press-fitting on the upper end of the guide pole. is fixed in the vertical direction, a holder is fitted to the guide pole so as to be movable up and down, the holder is connected to the hydraulic jack, and the holder is attached to the front hydraulic jack along the guide pole. and a chucking device for holding the ready-made pile in a standing position is attached to the holder, and a leader holder for holding the leader provided on the crane vehicle in a vertically movable manner is fixed to the guide pole, A lifting jack having an elastic force substantially equal to or greater than that of the hydraulic jack is interposed vertically between the guide pole and the leader.

The present invention can be expected to have effects by adopting this configuration. In other words, the reaction force generated when a pile is press-fitted by a hydraulic jack is not greater than the force of the hydraulic jack, so a lifting jack with a stretching force equal to or greater than that of the hydraulic jack for press-fitting will produce a press-fitting reaction force. It will not expand or contract unexpectedly due to Therefore, even if the guide pole is not fixed to the leader, the press-in reaction force can be absorbed by the crane vehicle simply by stopping the expansion and contraction of the lifting jack. In other words, with the above configuration, the entire press-in device can be raised and lowered from the ground simply by operating the lifting jack without having to swing the leader, and the press-in position can be changed, and the press-in reaction force can be reduced by the weight of the crane truck. It came to be accepted by In addition, since the press-fitting device moves up and down in parallel along the leader, it can be easily moved and installed to a new press-fitting position without changing the ground attitude of the press-fitting device at the previous press-fitting position, and the press-fitting device can be moved in parallel to the new press-fitting position in sequence. When press-fitting piles, the press-fitting device can be easily installed.

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIGS. 1 to 6 show a first embodiment of the present invention. As shown in Figures 1 and 2,
The inner and outer double annular bodies 1 and 2 are concentrically connected by stays 3, and can be connected to the top of the existing sheet pile B by a pin 4 passing through the stays 3, thereby creating a reaction force cradle 5. It consists of Cylindrical guide poles 6, 6, 6', 6' are erected from the square part of the outer ring of the reaction force pedestal 5, and the tops of these four poles 6 are mutually arranged in a U-shape in plan view. It is fixed to the connecting member 7. In the vertical direction parallel to the poles 6, the poles are connected to each of the U-shaped opposing sides of the connecting member 7,
Hydraulic jack 8, 8' cylinder 9 for press-fitting,
9' is fixed. Further, a square portion of an outer drum 10 having a cylindrical inner space with its axis directed in the vertical direction is fitted onto the poles 6, and the outer drum 10 is movable up and down along the poles 6. It is structured as follows. On the upper surface of the outer drum 10, an engaging portion 1 connects the lower ends of the piston rods 11, 11' of the hydraulic jacks 8 with pins.
3, 13' are provided. A first leader holder 62 is attached to the outer surface of the U-shaped intermediate side of the connecting portion 7, and is fitted to the leader 38 of a crane vehicle (not shown) in a vertically movable manner. Nearby, on both sides of the lower end of the leader 38, cylinders 64, 64' and piston rods 65, 65' of vertically oriented lifting hydraulic jacks 63, 63' are connected to pins 66, 66', 67. , 67'. In this manner, the guide poles 6 and the various structures attached thereto are configured to be able to move up and down along the leader 38 by the expansion and contraction of the lifting jacks 63, 63'. The lifting jacks 63, 63' have the same capacity as the hydraulic jacks 8... to prevent the lifting jacks 63, 63' from expanding unexpectedly due to the reaction force caused by press fitting.

As shown in FIGS. 3 and 4, a cylindrical inner drum 14 is mounted within the cylindrical space of the outer drum 10 so as to be rotatable around the vertical axis. This mounting structure fixes flanges 15 and 16 on the top and bottom of the inner drum 14,
A large number of steel balls 19 are provided between the flanges 15 and 16 and the upper and lower flanges 17 and 18 of the outer drum 10.
are arranged to allow rotation of both the upper and lower drums 10, 14 while preventing relative movement.
Near the outer periphery of the flange 16 at the bottom of the inner drum 14, a large number of small holes 20 are formed in a row along a circumference concentric with the center of rotation. Small holes 21 are also formed near the outer periphery of the lower end flange 18 of the outer drum 10, and by passing a pin 22 through both small holes 20, 21, the inner drum 14 can be inserted at any position.
It is constructed so as to prevent rotation of the. The lower end surface of the lower flange 16 of the inner drum 14, which is closer to the center of rotation, protrudes downward and is aligned with the upper end surface of a chucking device 23, which will be described later, and penetrates vertically at multiple points around the periphery. Bolt holes 24 are formed.

As shown in FIGS. 5 and 6, the chucking device 23 is formed with a recessed portion to fit into the lower surface of the lower flange 16 of the inner drum 14, and the bolt holes 24... An attachment/detachment flange 28 having female screw holes 27 vertically aligned with each other is fixed to the upper end of a C-shaped cylinder 29 in plan view. The hydraulic ram 3 moves in and out of the C-shaped open portion of the cylinder body 29 in a centripetal direction.
Two pieces of 0,30' are placed side by side, one above the other. Ram 30,
30' is a lid which forms the outer cases 31, 31' into a convex shape in plan view, forms a convex space in the cylindrical body 29 to fit the outer cases 31, 31', and which freely closes the lower end of the C-shaped open portion. A body 32 is provided, and this lid body 32
The rams 30, 30' can be attached and detached by opening and closing operations for attaching and detaching the mounting bolts 33. Reference numerals 34 and 34 in the figure refer to the rams 30 and 3.
This is a pressing member provided at the tip of 0'. A receiving plate 35, which is trapezoidal in plan view, is fixed in the inner space of the cylinder 29 so that its top surface 36 opposes the rams 30, 30'. Reference numerals 37 in the figure indicate reinforcing ribs provided radially outside the cylinder 29. Reference numeral 61 denotes cylindrical mounting seats for mounting the rotating arm, which are arranged on the outer periphery of the cylindrical body 29 at equal intervals in the circumferential direction with the central axis oriented in the centripetal direction. With this configuration, a crowbar or the like is inserted into the mounting seat 61 to attach the inner drum 1.
It is configured so that it can be used for the rotation arm of No. 4.

With the above structure, the chucking device 23 is fixed to the lower end surface of the inner drum 14, the sheet pile A passing through the inner drum 14 is held by the chucking device 23, and the hydraulic jack 8,
The structure is such that the sheet pile A can be press-fitted into the ground by expanding 8'.

As shown in FIGS. 1 and 2, a leader 3 of a crane (not shown) is attached to the outer side of the connecting member 7 of the outer drum 10 corresponding to the U-shaped middle side.
8, the second leader holder 39 is fitted in a vertically movable manner.
A mounting seat 41 is provided for removably attaching it with bolts 40. As shown in FIGS. 3 and 4, an engaging portion 13 for attaching the piston rod 11 provided on the upper surface of the outer drum 10 is provided with a steady rest of the earth auger coaxially with respect to the inner drum 14. A mounting seat 47 is provided to which the cylinder 45 is detachably mounted using bolts 46. This anti-sway cylinder 45 has an arm 48 extending outward from the outer periphery, and a bifurcated mounting portion 49 that fits onto the reinforcing rib 13A of the engaging portion 13 at the tip of the extension. It has been done.

<Second Embodiment> As shown in FIG. 7, the chucking device 2
3 can be configured and implemented as follows. That is,
A receiving plate 50 having a U-shape in plan view is provided on one side of the inner center of the cylinder 29, and the ram 30,
30', and a wide pressing member 51 is provided in the centripetal direction at the tips of the rams 30, 30', so that a shaped steel such as an H-shaped steel can be clamped. The rest is the same as the first embodiment, but the steady rest cylinder 45
Remove.

<Third Embodiment> As shown in FIGS. 8 and 9, the chucking device 23 is configured as follows and provided with a fastening tool 60 for clamping the pile. That is, the cylindrical body 52 is formed into a cylindrical shape, and a pivot shaft 53 having an axis extending in the vertical direction is provided on one side of the cylindrical inner space. Two planar arc-shaped clamping pieces 54, 54',
The arcuate recesses are opposed to each other and one end is connected to the pivot shaft 53.
It is centrally supported. And, these two holding pieces 54, 54'
The other end is connected via a hydraulic ram 57 to form a fastener 60 that clamps the cylindrical pile.

The clamping pieces 54, 54' are constructed by arranging a plurality of arc-shaped plates 55 vertically in parallel and connecting them with connecting plates 56. Holes 59, 59 are provided in the plates 56, 56' on the hydraulic ram 57 side of the connecting plates 56, which pass through the supporting rods 58, 58' in the horizontal direction. Both ends of the supporting rods 58, 58' are fixed to the cylinder 52, and prevent the clamping pieces 54, 54' from moving up and down due to press-fitting on the ram side.

<Fourth Embodiment> Although not shown in the drawings, the present invention may be configured and implemented as follows. In the first embodiment, the inner drum 14 and the chucking device 23 are integrated, and the steady rest cylinder 4 is attached to both of them.
5 are coaxially penetrated and fixed, and instead of the receiving plate 35, a sheet pile A is pressed against the outer periphery of the lower end of the cylinder 45 by rams 30, 30'.

<Fifth Embodiment> As shown in Figs. 10 and 11, an annular structure with double inner and outer sides has a rectangular inner space so that two sheet piles A and A' can be penetrated in a connected posture. body 10
1,102 are concentrically connected by stays 103...
A reaction force pedestal 105 that can be connected to the top of the existing sheet pile B is constructed by a pin 104 passing through the stays 103. A cylindrical guide pole 106 is erected from the square part of the reaction force holder 105, and its upper end is shaped like a U-shaped middle part in a plan view. 1-shaped connecting member 1
It is fixed at 07. A pole 10 is attached to each pole connection location on each U-shaped opposite side of the connection member 107.
The cylinders 109, 10 of the hydraulic jacks 108, 108' for press-fitting in the vertical direction parallel to 6...
9' is fixed. The pole 106... has
A square portion of a holding frame 110 having a rectangular shape substantially similar to the inner space of the reaction force pedestal 105 is fitted onto the outside, and the holding frame 110 is vertically movable along the poles 106 .

On the upper surface of the holding frame 110, piston rods 111, 11 of the hydraulic jacks 108, 108' are provided.
Engagement part 11 that connects the lower end of 1' with pin 112
3,113' is formed. Trapezoidal receiving plates 114 and 11 are provided in the rectangular inner space of the holding frame 110.
4' are arranged in parallel so that their top faces face forward and backward, and a sheet pile A is inserted through the U-shaped intermediate side of the connecting member 107 of one receiving plate 114 so as to hug this receiving plate 114. An opening 115 is formed to connect the sheet pile A' to the opposite side of the other receiving plate 114'.
An opening 115' is formed to pass through the hole 4' so as to hug the opening 115'. Both the openings 115, 115' are constructed in a mutually continuous shape so that the sheet piles A, A' can be connected to each other at their sides. At a position of the holding frame 110 facing the respective receiving plates 114, 114' across the respective openings 115, 115', there is a hydraulic pressure for pressing and clamping the sheet piles A, A' against the receiving plates 114, 114'. Rams 116, 116' are provided. As shown in the first embodiment, the hydraulic rams 116, 116' are attached to the holding frame 110 by means of a lid detachably attached to the lower end of the holding frame 110 with bolts so that they can be attached to and removed from the holding frame 110 in the vertical direction. Detachably fixed to the holding frame 110, sheet piles A,
Chucking device 1 that clamps two sheets of A′ side by side
It consists of 28.

Further, a first leader holder 120 is removably attached to the outer side of the U-shaped intermediate side of the connecting member 107, and is fitted onto a leader 119 of a crane vehicle (not shown) so as to be able to move up and down. The upper ends of the piston rods 123, 123' of the lifting hydraulic jacks 122, 122' attached vertically to the left and right sides of the lower end of the leader 119 are attached to the pins 121, 121' near the attachment point. Mounting seats 124, 124' are provided to be detachably attached.
The capacities of the lifting hydraulic jacks 122, 122' are the same as those of the press-fitting jacks 108, 108'.

The mounting seats 124, 124' are attached to the reader 119 with the first leader holder 120 removed.
a reaction force receiving arm 125 fixed at a predetermined height position;
It is detachably attached to the tip of 125' with pins 121, 121'. Connecting member 107
A second leader holder 126 is fixed to the holding frame 110 and is fitted to the leader 119 in a vertically movable manner at a position corresponding to the lower side of the first leader holder 120 . The leader 119 has an auger 1 that enters the receiving plates 114, 114' with the same spacing as the mutual spacing between the receiving plates 114, 114'.
A known auger drive device for holding and driving the upper ends of 27, 127' is mounted so as to be movable up and down.

With the above structure, the two sheet piles A and A' can be press-fitted simultaneously in an interconnected posture, and there is no need to rotate the chucking device when sequentially press-fitting the sheet piles A... Eliminated work. Since the configuration is such that two sheet piles A and A' are press-fitted, a large number of four or six sheet piles A...
The holding frame 110 can be made more compact than a device that simultaneously press-fits the parts, and the holding frame 110 will not be curved in front view due to the reaction force at the time of press-fitting.

<Sixth Embodiment> In the above configuration, the guide poles 106 may be provided at the left and right center portions of the U-shaped intermediate sides of the connecting member 107, for example, as shown in FIG. good. In the case of five, hydraulic jacks 108'' and 108 for press-fitting are provided one by one between the support parts of the poles 106 on the U-shaped middle side, so that press-fitting can be performed using a total of four hydraulic jacks 108... In this case, the lifting jacks 122, 122' have a capacity nearly twice that of the single hydraulic jack 108.

<Seventh Embodiment> Also, as shown in FIG. 13, the pole 106...
With four hydraulic jacks 108'' for press-fitting, one hydraulic jack 108'' for press-fitting may be provided at the left and right center of the middle side of the U-shape, and a total of three hydraulic jacks 108... may be used for press-fitting.
In this case, the lifting jacks 122, 122' have a capacity approximately 1.5 times that of the single hydraulic jack 108. When three or four hydraulic jacks 108 for press-fitting are used as in both embodiments, the hydraulic jacks 108, 108' fixed to the U-shaped opposite sides of the connecting member 107 are
It is preferable to provide it at a location closer to the free end side of the opposite side so that the press force and the press fit reaction force are made parallel in a plane.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention, FIG. 1 is an overall plan view, FIG. 2 is an overall side view, and FIG. 3 shows an inner drum, an outer drum, etc. FIG. 4 is a longitudinal sectional front view, FIG. 4 is a longitudinal sectional plan view corresponding to FIG. 3, FIG. 5 is a side view of the chucking device, and FIG. 6 is a bottom view corresponding to FIG. 5. 7 to 13 respectively show other embodiments of the present invention, FIG. 7 is a bottom view of the chucking device of the second embodiment, FIG. 8 is a bottom view of the chucking device of the third embodiment, 9 is a longitudinal sectional side view corresponding to FIG. 8, FIG. 10 is a plan view of the fifth embodiment, FIG. 11 is a side view corresponding to FIG. 10, and FIG. 12 is a plan view of the sixth embodiment. , FIG. 13 is a plan view of the seventh embodiment. 5,105...Reaction force pedestal, 6,106...Guide pole, 8,108...Hydraulic jack for press-fitting,
10,110... Holding frame, 23,123... Chucking device, 38,119... Reader, 62,1
20... Leader holder, 63, 122... Lifting jack.

Claims (1)

[Claims] 1. Reaction force pedestal 5 that is mounted and fixed on an existing pile,
A plurality of guide poles 6, 6',
106, 106 are erected, and this guide pole 6,
Press-fitting hydraulic jacks 8, 8', 108, 108' are fixed to the upper ends of the guide poles 6', 106, 106 in the vertical direction, and the guide poles 6, 6', 106, 1
The holders 10, 110 are fitted to the guide poles 06 so as to be movable up and down, and the holders 10, 110 are connected to the hydraulic jacks 8, 8', 108, 108'. 6,6',10
6, 106 along with the hydraulic jacks 8, 8',
A chucking device 23, 123 configured to move up and down at 108, 108' and clamping a ready-made pile in a standing position is attached to the holder 10, 110, and the guide pole 6, 6', 106, 106 is attached to the holder 10, 110.
A leader holder 62, 120 for vertically movably holding the leader 38, 119 provided on the crane vehicle is fixed to the guide pole 6, 6', 106, 1.
06 and the leader 38, 119, a lifting jack 63 having an elastic force substantially equal to or greater than that of the hydraulic jack 8, 8', 108, 108',
A press-fitting device for ready-made piles, characterized in that 63', 122, 122' are inserted vertically. 2 Said guide pole 6, 6', 106, 106
A connecting member 7, 107 is provided that connects the upper ends of each other, and the connecting member 7, 107 is connected to the hydraulic jacks 8, 8', 108, 108', the leader holder 62, 120, and the lifting jack 63, 63',
122, 122' are fixed to one end, and the other end of the lifting jack 63, 63', 122, 122' is fixed to the lower end of the leader 38, 119. Press-fit device for ready-made piles. 3 Rams 116, 11 for holding sheet pile A
When two sets of rams 116, 116' and receiving plates 114, 114' are arranged side by side in the horizontal direction, the rams 116, 116' and receiving plates 114, 1
The chucking device 123 is arranged side by side with the positions in the clamping direction of the chucking device 14' being interchanged with each other so as to continuously clamp the two sheet piles A and A' in the lateral direction.
A press-fitting device for ready-made piles according to claim 1, which comprises: