JP2022114866A - Pile driving machine - Google Patents

Abstract

To provide a pile driving machine allowing inclination of a pile in a lateral direction to be adequately supported.SOLUTION: A pile driving machine 11 is provided with: a traveling body 13 having a chassis 22 supporting a left crawler 12a and a right crawler 12b driven forward developedly from paralleled positions; a superstructure 19 displaceably arranged on the chassis 22 in a longitudinal direction from a reference position to a retreat position and supporting a driver seat 17 and a power source 18; and a work front 21 including an auger 43 connected on the superstructure 19 and giving driving force to a pile member PL erected in the ground GL between the left crawler 12a and the right crawler 12b when the superstructure 19 is positioned at the retreat position based on power transmitted from the power source 18.SELECTED DRAWING: Figure 5

Description

The present invention comprises a traveling body having a chassis that supports a left crawler and a right crawler, a revolving body that is installed on the chassis and supports a driver's seat and a power source, and a pile that is coupled to the revolving body and thrust into the ground. The present invention relates to a pile driver having a work front including an auger that imparts driving force to a material based on power transmitted from a power source.

Pile drivers with working fronts that include augers are widely known. The auger applies a driving force to the pile material that is pushed into the ground. At this time, when the pile is tilted in the left-right direction, the pile is tilted in the left-right direction according to the driving force acting from the auger along the longitudinal axis of the pile.

Japanese Patent No. 6769920 JP 2018-135185 A

In general, in such a case, the outriggers that widely spread in the left-right direction can support the fall of the pile material. However, the installation of outriggers hinders the miniaturization of pile drivers.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pile driver capable of satisfactorily supporting the collapse of a pile material in the left-right direction.

According to one aspect of the present invention, a traveling body having a chassis supporting a left crawler and a right crawler that are driven from a parallel position to a front-opening position; a revolving body supporting a driver's seat and a power source; and a revolving body coupled to said revolving body and thrust into the ground between said left crawler and said right crawler when said revolving body is positioned at said retracted position. A pile driver is provided that includes a work front including an auger that applies a driving force to a pile based on power transmitted from the power source.

The left crawler and the right crawler of the pile driver are arranged to open forward when applying the driving force. When the rotating bed is in the retracted position, the piling material can be driven into the ground between the left and right crawlers. Even if the pile material falls down in the left-right direction due to the operation of the auger or the reaction force from the ground, the front-opening left crawler and right crawler can support the falling pile material by standing on the ground.

The pile driver may further include a tilting mechanism for tilting the driving direction of the auger around the longitudinal axis. When a driving force is applied from an auger along the longitudinal axis of a pile that is inclined in the left-right direction, a force that causes the pile to fall down in the left-right direction is likely to occur. Even in this case, the front-opening left crawler and right crawler can stand on the ground and support the fall of the pile material.

The pile driver may further comprise a ground-contacting dozer blade extending rearwardly from the chassis. Even if the center of gravity shifts to the rear of the left crawler and right crawler when the revolving structure is retreated to the retracted position, the weight acting on the rear of the left crawler and right crawler is supported by the dozer blade, so Falling of the hammer can be avoided. As the pile driver retracts in response to actuation of the left and right crawlers, the dozer blades can level the ground.

As described above, according to the disclosed pile driver, it is possible to satisfactorily support the collapse of the pile material in the left-right direction.

BRIEF DESCRIPTION OF THE DRAWINGS It is the (a) side view and (b) top view which show roughly the structure of the pile driver which concerns on one Embodiment of this invention. 4 is a plan view schematically showing the structure of the chassis; FIG. It is a front view of a pile driver which shows roughly operation|movement of a tilting mechanism. FIG. 4 is a side view of the pile driver schematically showing the revolving body in the retracted position; It is a top view which shows roughly the left crawler and right crawler of the state of front opening.

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

FIG. 1 schematically shows the structure of a pile driver (construction machine) according to one embodiment of the present invention. The pile driver 11 includes a traveling body 13 that travels on the ground GL according to the motions of the left crawler 12a and the right crawler 12b, a slide mechanism 15 that moves a slider 14 forward and backward on the traveling body 13, and a vertical axis 16. A revolving body 19 that is rotatably supported by the slider 14 and has an operator's seat 17 and a power source 18, and a work that is coupled to the revolving body 19 and performs a work determined according to the operation of the combined components. A front 21 is provided. Here, the left crawler 12a and the right crawler 12b are constructed symmetrically with respect to the vertical plane LR. For example, a diesel engine or an electric motor can be used as the power source 18 .

The traveling body 13 includes a chassis 22 that supports the left crawler 12a and the right crawler 12b. The left crawler 12a and the right crawler 12b are each supported by a chassis 22 so as to be rotatable about a horizontal axis 23a. A roller 24 supported on the chassis 22 so as to be rotatable around a horizontal axis 24a parallel to the axis (horizontal axis 23a); and a crawler belt (shoe) 25 that is received by the ground GL and transmits the driving force of the starting wheel 23 to the ground GL. When the left and right crawler belts 25 move at the same speed, the traveling body 13 can move forward or backward. Depending on the speed difference between the left and right crawler belts 25, the traveling body 13 can turn left or right. Since the left crawler 12a and the right crawler 12b should just have the structure similar to the existing crawler, the detailed description of the left crawler 12a and the right crawler 12b is omitted here.

As shown in FIG. 2, the chassis 22 includes a base 27, a first movable body 28 rotatably coupled to the base 27 about a first vertical axis 28a and supporting the left crawler 12a, and a first vertical axis 28a. A second movable body 29 that is rotatably connected to the base body 27 about a second vertical axis 29a parallel to the axis 28a and supports the right crawler 12b. A hydraulic cylinder 31 is connected to the first movable body 28 and the second movable body 29 . The hydraulic cylinder 31 is housed in a cylinder body 31a, and includes a piston that moves in the axial direction while defining two hydraulic chambers in the cylinder body 31a, and a piston that is connected to the piston and moves in and out of the cylinder body 31a according to the displacement of the piston. and a rod 31b. At one axial end of the hydraulic cylinder 31, the cylinder body 31a is connected to the first movable body 28 so as to be rotatable about the vertical axis. A bearing for receiving a pin erected by the first movable body 28 may be formed in the cylinder body 31a for connection. At the other axial end of the hydraulic cylinder 31, the rod 31b is connected to the second movable body 29 so as to be rotatable about the vertical axis. A bearing for receiving a pin erected by the second movable body 29 may be formed on the rod 31b for connection.

A link member 32 is connected to the first movable body 28 and the second movable body 29 . The link member 32 can be formed from steel, for example. Link member 32 maintains a predetermined length in its axial direction. One end of the link member 32 is connected to the first movable body 28 ahead of the first vertical axis 28a so as to be rotatable about an axis parallel to the first vertical axis 28a. A bearing for receiving a pin erected by the first movable body 28 may be formed at one end of the link member 32 for connection. The other end of the link member 32 is connected to the second movable body 29 behind the second vertical axis 29a so as to be rotatable about an axis parallel to the second vertical axis 29a. A bearing for receiving a pin erected by the second movable body 29 may be formed at the other end of the link member 32 for connection. When the hydraulic cylinder 31 is set to the specified length, the left crawler 12a and the right crawler 12b are arranged in parallel as shown in FIG. 2(a). The rotation axis of the drive wheel 23 of the left crawler 12a is set parallel to (here, coaxial with) the rotation axis of the drive wheel 23 of the right crawler 12b. At this time, the central axis of the hydraulic cylinder 31 is arranged in the horizontal direction parallel to the rotation axis of the driving wheel 23 . That is, the central axis of the hydraulic cylinder 31 is perpendicular to the vertical plane LR.

As shown in FIG. 2(b), when the hydraulic cylinder 31 extends from the specified length, the left crawler 12a and the right crawler 12b are driven from the parallel position to the forward opening. The opening angle of the left crawler 12a and the right crawler 12b can be adjusted by the action of the link member 32 . Here, the left crawler 12a and the right crawler 12b change their postures outward in the left-right direction at equal opening angles. The central axis of the hydraulic cylinder 31 is maintained in the left-right direction in driving the front opening. The base body 27, the first movable body 28, the second movable body 29, the hydraulic cylinder 31 and the link member 32 cooperate to form a front opening mechanism that drives the left crawler 12a and the right crawler 12b from the parallel position to the front opening.

A dozer blade 34 is arranged behind the chassis 22 . A dozer blade 34 extends rearwardly from the base body 27 . The dozer blade 34 can be displaced about a horizontal axis between an operative position in contact with the ground GL and an inoperative position in which it is lifted away from the ground GL. The driving force of a hydraulic cylinder (not shown) can be used for displacement. When the dozer blade 34 is set to the operating position, the dozer blade 34 can level the ground GL as the pile driver 11 retreats (or advances). The dozer blade 34 in the non-operating position does not interfere with the driving of the pile driver 11.例文帳に追加Since the dozer blade 34 only needs to have the same structure as the existing dozer blade, detailed description of the dozer blade 34 is omitted here.

The slide mechanism 15 is fixed to the base body 27 of the chassis 22 and extends linearly in parallel with each other, and includes left and right rails 35 that guide the forward and backward movement of the slider 14, and hydraulic cylinders connected to the base body 27 and the slider 14. 37. The left and right rails 35 extend horizontally in the front-rear direction. As the hydraulic cylinder 37 expands and contracts, the slider 14 is horizontally displaced in the front-rear direction.

The revolving body 19 includes a base 38 that is connected to the slider 14 so as to be rotatable about the vertical axis 16 and supports the driver's seat 17 and the power source 18 . A hydraulic pump (not shown) is connected to the power source 18 . The hydraulic pump generates hydraulic pressure according to power supplied from the power source 18 . Hydraulic pressure is supplied to each hydraulic cylinder 31, 37+ from a hydraulic pump. When the hydraulic cylinder 37 is set to the prescribed length, the revolving structure 19 is arranged on the chassis 22 at the reference position in the longitudinal direction. Here, the reference position corresponds to the frontmost position of the slider 14 . When the hydraulic cylinder 37 is extended from its prescribed length, the rotating bed 19 is placed in the retracted position on the chassis 22 . Here, the retracted position corresponds to the last position of slider 14 . At this time, even if the center of gravity of the weight acting on the traveling body 13 from the revolving body 19 deviates rearward from the rotation axis of the motive wheel 23, the weight acting behind the left crawler 12a and the right crawler 12b is still the dozer blade at the operating position. 34 can be supported.

The work front 21 includes a boom 39 that is connected to the revolving body 19 so that it can be raised and lowered around a horizontal axis 39a extending in the left-right direction, a guide member 42 that is coupled to the boom 39 and guides the displacement of the leader 41, and a guide member 42 that guides the displacement of the leader 41. An auger 43 supported by a leader 41 so as to be displaceable, and a hydraulic cylinder 44 connected to a boom 39 and a swing body 19 are provided. The auger 43 applies driving force to the pile material PL based on the power transmitted from the power source 18 . The auger 43 can be driven downward along the leader 41 . For application of driving force, a chain supported by the leader 41 and wound around a sprocket may be connected to the auger 43, for example. The chain can move along a trajectory determined according to the hydraulic pressure supplied from the hydraulic pump. The auger 43 is coupled to the pile material (or drill) PL and can apply a rotational force to the pile material PL around the axis. Hydraulic pressure can be supplied to the auger 43 from, for example, a hydraulic pump to generate the rotational force. Since the auger 43 may have a structure similar to that of existing augers, a detailed description of the auger 43 is omitted here.

For example, a chain 46 that is supported by the guide member 42 and wound around the sprocket can be connected to the leader 41 . The chain 46 can move along a trajectory determined according to the hydraulic pressure supplied from the hydraulic pump. The leader 41 can be vertically displaced relative to the guide member 42 according to the movement of the chain 46 . The position of the auger 43 can be adjusted vertically according to the displacement of the leader 41 . The reader 41 is arranged at the center position in the left-right direction.

The boom 39 defines a fixed surface 48 orthogonal to a front-rear axis 47 extending horizontally in the front-rear direction when the hydraulic cylinder 44 is set to a specified length. At this time, the fixed surface 48 forms a vertical surface. The guide member 42 is superimposed on the fixed surface 48 so as to be rotatable around the longitudinal axis 47 . When the hydraulic cylinder 44 extends from the specified length, the boom 39 falls forward. The fixed surface 48 is inclined in the front-rear direction. The leader 41 moves away from the revolving body 19 as it moves away from the ground GL.

A tilting mechanism 49 for tilting the driving direction of the auger 43 about the longitudinal axis 47 is connected to the guide member 42 . The tilting mechanism 49 comprises a hydraulic cylinder 51 connected to the boom 39 and the guide member 42 . When the hydraulic cylinder 51 is set to the specified length, the leader 41 is set in a vertical posture around the longitudinal axis 47 as shown in FIG. At this time, the auger 43 can move up and down in the vertical direction. When the hydraulic cylinder 51 is contracted from the specified length, the leader 41 (41a) tilts leftward about the longitudinal axis 47. As shown in FIG. The leader 41a is inclined clockwise when viewed from the front. The auger 43 can move in a tilting direction along the tilting leader 41a. When the hydraulic cylinder 51 extends from the specified length, the leader 41 (41b) tilts rightward about the longitudinal axis 47. As shown in FIG. The leader 41b inclines counterclockwise when viewed from the front. The auger 43 can move in the oblique direction along the oblique leader 41b. Hydraulic pressure can be supplied to the hydraulic cylinder 51 from a hydraulic pump.

Next, the operation of the pile driver 11 will be explained. Pile material PL is set on work front 21 . As shown in FIG. 4, the height of the auger 43 is adjusted according to the length of the pile material PL. The leader 41 is caused to move up and down with respect to the guide member 42 when adjusting the height. The inclination angle of the pile PL is adjusted with respect to the ground GL. The inclination of the pile driver 11 in the longitudinal direction with respect to the running direction can be adjusted by raising and lowering the boom 39 . Hydraulic pressure is supplied from a hydraulic pump to the hydraulic cylinder 44 for adjusting the undulation. The tilt in the horizontal direction with respect to the running direction of the pile driver 11 can be adjusted by rotating the leader 41 around the longitudinal axis 47 . Hydraulic pressure is supplied from a hydraulic pump to the hydraulic cylinder 51 to adjust the rotation.

The pile material PL is positioned at a determined position on the ground GL. The left crawler 12a and the right crawler 12b are operated for positioning. At this time, the revolving body 19 is moved rearward on the running body 13 by the action of the slide mechanism 15 . As the revolving body 19 moves, the lower end of the pile material PL is pulled into the space sandwiched between the left crawler 12a and the right crawler 12b. When the revolving body 19 is positioned at the retracted position in this way, the pile material PL can be thrust into the ground GL between the left crawler 12a and the right crawler 12b. The dozer blade 34 may be maintained at the non-operating position in positioning the pile material PL.

As shown in FIG. 5, the left crawler 12a and the right crawler 12b are driven forward from the parallel position in the pile driver 11 prior to applying the driving force. Hydraulic pressure is supplied from a hydraulic pump to the hydraulic cylinder 31 for driving the left crawler 12a and the right crawler 12b. Dozer blade 34 is driven to the operating position. After that, a driving force is applied from the auger 43 to the pile material PL. In this way, the pile material PL is driven into the ground. Even if a force that causes the pile PL to fall in the left-right direction due to the operation of the auger 43 or the reaction force from the ground GL, the front-opening left crawler 12a and the right crawler 12b stand on the ground GL, causing the pile PL to fall. can support

In this embodiment, the pile driver 11 includes a tilting mechanism 49 that tilts the driving direction of the auger 43 around the longitudinal axis 47 . When a driving force is applied from the auger 43 along the longitudinal axis of the pile material PL inclined in the left-right direction, a force that causes the pile material PL to fall down in the left-right direction is likely to occur. Even in this case, the front-opening left crawler 12a and right crawler 12b can stand on the ground GL to support the fall of the pile material PL.

In this embodiment, the dozer blade 34 extends rearward from the chassis 22 and contacts the ground GL when driving the pile material PL. Even if the center of gravity shifts behind the left crawler 12a and the right crawler 12b when the revolving body 19 moves back toward the retracted position, the weight acting behind the left crawler 12a and the right crawler 12b is supported by the dozer blade 34. Therefore, the pile driver 11 can be prevented from falling backward. When the pile driver 11 retreats in response to the actuation of the left crawler 12a and the right crawler 12b, the dozer blade 34 can level the ground GL.

11 Pile driver 12a Left crawler 12b Right crawler 13 Traveling body 17 Driver's seat 18 Power source 19 Revolving body 21 Working front 22 Chassis 34 Dozer blade 43 Auger 47 Back-and-forth axis 49 Tilt mechanism GL Ground PL Pile material.

Claims (3)

a running body having a chassis that supports left crawlers and right crawlers that are driven forward from a parallel position;
a revolving body installed on the chassis so as to be displaceable in the longitudinal direction from a reference position to a retracted position and supporting a driver's seat and a power source;
Based on the power transmitted from the power source to the pile material coupled to the revolving body and thrust into the ground between the left crawler and the right crawler when the revolving body is in the retracted position a working front including an auger that imparts a driving force;
A pile driver, comprising: 2. The pile driver according to claim 1, further comprising a tilting mechanism for tilting the driving direction of the auger about the longitudinal axis. 3. A pile driver according to claim 1 or 2, further comprising a dozer blade extending rearwardly from said chassis and contacting the ground.

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