JP4931665B2 - Pile driver - Google Patents

Description

  The present invention has a turning frame installed on a lower traveling body via a turning device, and at least a hydraulic power unit, a driver's cab and a counterweight are mounted on the turning frame, and a reader is attached to a front portion of the turning frame, The present invention relates to a pile driving machine in which a rotary drive device for an excavating tool is mounted on the leader so as to be movable up and down.

  In a foundation machine such as a pile driving machine for excavating a vertical hole, a small-sized foundation machine often uses a hydraulic excavator as a base machine, as described in Patent Document 1, for example. A hydraulic excavator has a front frame attached to the front part of an upper revolving structure installed on a lower traveling body via a revolving device, a leader is erected on the front frame, and an excavator such as a screw auger is mounted along the leader. In general, a rotary drive device that rotates is attached so as to be movable up and down.

  Further, Non-Patent Document 1 discloses that when an upper structure is configured by a bucket working device including a turning device, a boom, an arm, and a driver's cab on a traveling body frame, and a loader excavator is attached to the traveling body frame. A configuration is disclosed in which the mounting position of the upper structure is changed to the rear side on the traveling body frame, so that the weight balance in the front-rear direction is maintained.

JP-A-8-128034 Invention Association Official Number 2006-505906

  In the case where the leader is attached to the front portion of the upper swing body via the front frame like the conventional machine described in Patent Document 1, the distance between the leader and the pivot center of the upper swing body is increased, resulting in a large weight. Counterweight was needed. For this reason, the weight of the whole machine increases, and as a result, there is a problem that the material and work amount required for ground curing increase in order to increase the ground strength at the site.

  On the other hand, as described in Non-Patent Document 1, when it is configured so that the mounting position of the upper structure including the turning device with respect to the traveling body frame can be changed, the turning device and the center joint installed at the center thereof must also be moved. There is a problem that labor and labor required for the relocation work increase.

  In view of the above problems, the present invention is a pile driving machine that attaches leaders of different lengths to a turning frame, and can cope with changes in the length of the leader by a relatively simple operation without increasing the overall weight. An object of the present invention is to provide a pile driving machine having a configuration capable of maintaining a weight balance before and after a revolving frame regardless of the length of the swing frame.

The pile driving machine according to claim 1 has a hydraulic excavator as a base machine, a turning frame is installed on a lower traveling body of the hydraulic excavator via a turning device, and at least a hydraulic power unit, a cab and a counterweight are provided on the turning frame. In a pile driving machine in which a leader is attached to the front part of the swivel frame, and a rotary drive device of a drilling tool is attached to the leader so as to be movable up and down.
The upper structure unit is configured to include at least a subframe, a cab mounted on the subframe, a hydraulic power unit, and a counterweight, and the upper structure unit is provided at a plurality of positions in the front-rear direction of the swivel frame. Provide the mounting part,
In accordance with the length of a reader attached to the front part of the swivel frame, one of the plurality of attachment parts is selected, and the subframe of the upper structure unit is attached to the selected attachment part. It is characterized by that.

  According to the present invention, when the long leader is attached to the swivel frame, the upper structure unit is moved to the rear on the swivel frame. On the contrary, when the short leader is attached to the swivel frame, the front on the swivel frame is moved. By moving the upper structure unit to the position, it is possible to maintain a weight balance before and after the turning center even when a leader having a different length is attached.

  The pile driver of the present invention can maintain the weight balance without increasing the overall weight as compared with the case where the weight is balanced by increasing or decreasing the weight of the counterweight. For this reason, even when a long reader is used, ground curing at the site can be reduced, and labor and materials for this can be reduced. Moreover, since the weight of the whole pile driver becomes light, conveyance to the spot becomes easy.

  Moreover, when pile driving is performed using a short leader in a narrow field, the work can be performed by moving the upper structure unit forward, so that the radius from the turning center to the rear end can be reduced. Therefore, it is possible to perform pile driving work at a narrower site.

  In addition, if a hydraulic excavator is used as a base machine and the lower traveling body and upper structure unit of the hydraulic excavator are unitized using standard equipment, existing ones can be applied without significant modification. A pile driver can be constructed, and a pile driver can be manufactured at low cost.

  Moreover, since the upper structure unit does not include a turning device, the transfer work of the center joint for supplying hydraulic oil to the turning device, the lower traveling body, or the like is not required, and the upper portion when the leader is replaced The transfer work of the structure unit becomes easy.

  FIG. 1 and FIG. 2 are side views showing an embodiment of the pile driving machine according to the present invention when a short reader 1A is used as a leader and when a long reader 1B is used. This pile driving machine uses a hydraulic excavator as a base machine, 2 is a crawler type lower traveling body of the hydraulic excavator, and this lower traveling body 2 is provided on the left and right sides of a turning frame (not shown) on the center side. A side frame 3 is provided, a drive sprocket 4 driven by a hydraulic motor (not shown) is provided at the rear of these side frames 3, a front sprocket 5 is provided, and a crawler belt 6 is wound around these. is there. The lower traveling body 2 may be a wheel type.

  7 is a turning device installed on the center frame constituting the lower traveling body 2. The swivel device 7 includes a fixed wheel fixed to the center frame, a swivel wheel on which a swivel wheel is fixed via a bearing and a swivel frame 8 fixed thereto, and a swivel motor (see FIG. (Not shown) and a gear rotated by the turning motor, and an internal gear meshed with the gear and provided on the fixed ring, and a turning frame with respect to the lower traveling body 2 by forward and reverse rotation of the turning motor. 8 is turned forward and backward.

  A front frame 9 is attached to the front portion of the revolving frame 8 by a fixture 10 such as a left and right pin or bolt. A lateral swing frame 12 is attached to the front frame 9 so as to be swingable left and right by a hydraulic cylinder (not shown) about a vertical shaft 11. This laterally swinging frame 12 has an outrigger 13 attached to the left and right. The outrigger 13 is landed at the time of pile driving work to support the aircraft and to stabilize the aircraft. A left and right swing frame 15 is attached to the lateral swing frame 12 by a left and right hydraulic cylinder 16 so as to swing left and right about a horizontal shaft 14 provided in the front-rear direction. The leader 1 </ b> A or 1 </ b> B is attached so as to be able to lie up and down so that it can fall backward by a hydraulic cylinder 18 around a horizontal shaft 17 provided on the left and right swing frame 15 facing left and right. In some cases, the left and right swing frame 15 may be directly attached to the front frame 9 without mounting the lateral swing frame 12.

  The readers 1 </ b> A and 1 </ b> B are provided with guide members 19 facing up and down on the left and right sides. That is, the sliding arm 21 provided in the rotational driving device 20 is slidably engaged with the guide member 19 so that the rotational driving device 20 is mounted on the readers 1A and 1B so as to be movable up and down. As the drilling tool, a screw auger, a casing having a drilling bit, or the like is used. The rotary drive device 20 is moved up and down along the readers 1A and 1B by an elevating device, and the excavator is rotated to perform excavation. As a lifting / lowering device of the rotation driving device 20, a rotating sprocket chain is rotated between a driving sprocket rotated by a hydraulic motor provided below the leaders 1A and 1B and a driven sprocket provided above the leaders 1A and 1B. A device to which the driving device 20 is connected, a device using a hydraulic cylinder, a device in which a hydraulic cylinder and a rope are combined, a screw rod method, a rack-pinion method, or the like can be adopted.

  Reference numeral 22 denotes a winch attached to the back of the leaders 1A and 1B, which is supported by a wire rope (not shown) with a hook that is taken up and fed out by the winch when a drilling tool or a pile is added and pulled out. Is. The wire rope wound and fed by the winch 22 is hung around the sheaves 23 and 24 at the tops of the leaders 1A and 1B. In some cases, a telescopic reader may be used as the reader 1A or 1B.

  In this pile driving machine, when changing the length of the reader used between the short reader 1A and the long reader 1B, one or more divided readers 1m shown in FIG. 2 are added to the short reader 1A shown in FIG. Either add or remove the split boom 1m from the long leader 1B and reconfigure the leader, or replace the leaders 1A and 1B exactly. When the leaders 1A and 1B are completely replaced, the horizontal swing frame 15 and the leaders 1A and 1B are attached and detached by the horizontal shaft 17, and the piston rod pin 26 of the hydraulic cylinder 18 with respect to the bracket 25 provided on the leaders 1A and 1B. Replace it.

  Reference numeral 27 denotes an upper structure unit mounted on the revolving frame 8. The upper structure unit 27 includes a subframe 28, a cab 29, a hydraulic power unit 30, a counterweight 31 and a control valve (see FIG. (Not shown). The hydraulic power unit 30 includes a prime mover, a hydraulic pump driven by the prime mover, a generator, an oil tank, an oil cooler, a radiator, and the like.

  As shown in FIG. 3, the revolving frame 8 is provided with two attachment portions 32 and 33 at the front and rear in order to attach the upper structure unit 27. Each of the attachment portions 32 and 33 has a plurality of bolt insertion holes 34 arranged in an annular shape. From the distance A from the turning center O of the turning frame 8 when the short reader 1A is used to the center O1 of the mounting portion 32 of the upper structure unit 27, the upper structure unit 27 from the turning center O when using the long reader 1B is used. The distance B to the center O2 of the mounting portion 33 is set large (A <B). You may provide these attachment parts in three or more places.

  The turning frame 8 has a hole 35 through which the fixture 10 (see FIGS. 1 and 2) for attaching the front frame 9 is inserted, an attachment portion 36 of the turning device 7, and a hydraulic motor for traveling of the lower traveling body 2. An opening 37 for inserting a center joint (not shown) for supplying hydraulic oil to the fluid is provided. As shown in FIG. 4, screw holes 39 are provided in the subframe 28 of the upper structure unit 27 at positions corresponding to the bolt insertion holes 34 of the attachment portions 32 and 33 of the revolving frame 8. As shown in FIGS. 1 and 2, the outriggers 13 are also attached to the left and right of the rear portion of the revolving frame 8.

  As shown in FIG. 1, when pile driving is performed using the short leader 1A, the screw hole 39 of the upper structure unit 27 is formed at the position of the bolt insertion hole 34 of the front mounting portion 32 shown in FIG. The upper structure unit 27 is fixed to the turning frame 8 by aligning the positions and inserting the bolt 40 (see FIG. 4) into the bolt insertion hole 34 from below the turning frame 8 and screwing it into the screw hole 39. As shown in FIG. 2, when using the long leader 1B, the position of the screw hole 39 of the upper structure unit 27 is aligned with the position of the bolt insertion hole 34 of the rear mounting portion 33, and the bolt 40 is moved to the swivel frame 8. The upper structure unit 27 is fixed to the revolving frame 8 by being inserted into the bolt insertion hole 34 from below and screwed into the screw hole 39. Since the distance B from the turning center of the attaching portion 33 of the long reader 1B is larger than the distance A from the turning center of the attaching portion 32 of the short reader 1A, the short reader 1A is used when using the long reader 1B. The upper structure unit 27 is installed at the rear side.

  In this way, by moving the upper structure unit 27 to the front and rear of the swivel frame 8 in accordance with the length of the leaders 1A and 1B, that is, the weight, even when the leaders having different lengths are attached, It becomes possible to maintain a weight balance.

  Thus, by balancing the weight by moving the upper structure unit 27, the weight balance can be maintained without increasing the overall weight as compared with the case of balancing the weight by increasing or decreasing the weight of the counterweight. For this reason, even when using the long reader | leader 1B, the ground curing in the field can be reduced and the labor and material for this can be reduced. Moreover, since the weight of the whole pile driver becomes light, conveyance to the spot becomes possible.

  Further, when pile driving is performed using the short leader 1A in a narrow field, the work can be performed by moving the upper structure unit 27 forward, so that the radius from the turning center to the rear end is reduced. Therefore, it is possible to perform pile driving work in a narrower site.

  In addition, the hydraulic excavator is used as a base machine, and the lower traveling body 2 and the upper structure unit 27 of this hydraulic excavator are unitized by using standard machines, so that existing ones can be used without significant modification. The pile driver can be constructed by applying it, and the pile driver can be manufactured at low cost.

  Further, according to the present invention, since the upper structure unit 27 does not include the turning device 7, the work of moving the center joint for supplying hydraulic oil to the turning device 7, the lower traveling body 2, or the like becomes unnecessary, and the leader is replaced. In this case, the relocation work of the upper structure unit is facilitated.

It is a side view which shows one Embodiment of the pile driver by this invention in the use condition of a short leader. It is a side view which shows one Embodiment of the pile driver by this invention in the use condition of a elongate leader. It is a top view of the turning frame of this Embodiment. It is a side view which shows the attachment structure of the upper structure unit of this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A: Short leader, 1B: Long leader, 2: Undercarriage, 3: Side frame, 4: Drive sprocket, 5: Driven sprocket, 6: Crawler, 7: Turning device, 8: Turning frame, 9: Front frame 11: vertical shaft, 12: lateral swing frame, 13: outrigger, 14: horizontal shaft, 15: left and right swing frame, 16: hydraulic cylinder, 17: horizontal shaft, 18: hydraulic cylinder, 19: guide member, 20 : Rotational drive device, 21: sliding arm, 22: winch, 23, 24: sheave, 25: bracket, 26: pin, 27: upper structure unit, 28: subframe, 29: cab, 30: hydraulic power unit , 31: counterweight, 32, 33: mounting portion, 34: bolt insertion hole, 35: front frame mounting hole, 36: swivel device mounting portion, 37: set For Tha joint opening, 39: screw hole, 40: bolt

Claims (1)

A hydraulic excavator is used as a base machine, a turning frame is installed on a lower traveling body of the hydraulic excavator via a turning device, and at least a hydraulic power unit, a cab and a counterweight are mounted on the turning frame. In the pile driving machine which attaches a leader to the front part and attaches the rotary drive device of the excavator to the leader so as to be movable up and down,
The upper structure unit is configured to include at least a subframe, a cab mounted on the subframe, a hydraulic power unit, and a counterweight, and the upper structure unit is provided at a plurality of positions in the front-rear direction of the swivel frame. Provide the mounting part,
In accordance with the length of a reader attached to the front part of the swivel frame, one of the plurality of attachment parts is selected, and the subframe of the upper structure unit is attached to the selected attachment part. A pile driver characterized by that.

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