JP2989531B2 - Workbench elevating device for pile construction machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an auxiliary work for pile construction by a construction mechanism such as an auger drive mechanism and a hammer mechanism,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workbench elevating device for a pile construction machine that moves up and down a workbench used for maintenance and inspection work of a construction mechanism.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 57-26926, a worktable is mounted on a guide shaft having a hexagonal cross section provided along a reader so as to be able to move up and down, and the worktable is suspended by a winch. There is known a mechanism in which a rotation mechanism for rotating a guide shaft is attached to a lower side surface of a reader. Then, the guide shaft is rotated by the rotation mechanism to improve the accessibility between the construction mechanism that moves up and down along the leader and the work table. However, since the work table suspended by the winch is rotated together with the guide shaft, unless the winch wire is also moved along with the work table, the wire becomes entangled, making it difficult to handle the wire.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 5-331855, a work table is supported so as to be able to move up and down along a guide frame provided on a reader, and a wire having one end fastened to the work table is wound around a sheave. Later, there is also known a configuration in which the work table is wound up on a drum on a vehicle body to raise and lower the work table, and when the reader is tilted, the floor surface of the work table can be tilted.

[0004]

However, in such a conventional apparatus, it is preferable to form the work table close to the construction mechanism from the viewpoint of workability.
As described in JP-A-5, if the worktable does not rotate,
When raising and lowering the construction mechanism, the construction mechanism and the work table interfere with each other, and the work table must be removed every time the construction mechanism is moved up and down. there were.

[0005] It is an object of the present invention to provide a workbench lifting and lowering device for a pile construction machine capable of improving accessibility with a simple configuration.

[0006]

In order to achieve the above object, the present invention takes the following means to solve the problem. That is, in a pile construction machine that raises and lowers a construction mechanism along a first guide rail provided on a standing leader, the pile construction machine moves along a second guide rail provided on the leader in parallel with the first guide rail. A worktable having a movable table supported so as to be movable and a boarding table pivotally supported by the movable table is provided, and an elevating drive mechanism for lifting and lowering the worktable is provided, and the worktable is provided on the boarding table. By operating the handle
The turning drive mechanism that turns the boarding board by driving the work
This is a workbench lifting and lowering device for a pile construction machine, which is provided on a table.

The turning drive mechanism includes a hydraulic cylinder for turning the boarding board and a hydraulic pump driven by the rotation of the handle , and the rotation of the handle in accordance with the rotation direction. A control valve for connecting the hydraulic cylinder and the hydraulic pump may be provided. Furthermore,
The turning drive mechanism includes a hydraulic source, and connects the hydraulic cylinder and the hydraulic pump in accordance with a rotation direction by rotating the handle , and a control valve that connects the hydraulic source to a suction side of the hydraulic pump. May be provided.

[0008] Alternatively, the swivel drive mechanism, said Han
The boarding platform may be turned via a reduction gear by the rotation of the dollar . Further, the boarding table may be provided with a locking pin slidable toward the moving table, and the moving table may be formed with a locking hole into which the locking pin can be inserted.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1 and FIG.
Is a body of a self-propelled pile construction machine using a crawler. The leader 2 is supported by a pair of stays 4 and a catching fork 6 so as to be able to be turned upside down, and is supported so that the leader 2 can be turned around its axis. Have been.

The reader 2 is provided with two first guide rails 8 and 10 having a long section with a circular cross section along its longitudinal direction (see FIG. 3). The auger drive mechanism 12 is slidably engaged along the first guide rails 8 and 10 via a plurality of guide gibs 14. The auger drive mechanism 12 includes a rotating shaft 7 described later.
2 is configured to rotationally drive the auger drill 16 attached thereto.

A pushing mechanism 18 connected to the auger drive mechanism 12 is slidably engaged with the first guide rails 8, 10 via a plurality of guide gibs 20 along the first guide rails 8, 10. Have been. The pushing mechanism 18 includes a pile 71
To give an axial pushing force to the arm.

The auger drive mechanism 12 includes a suspension sheave 22.
Is rotatably supported, one end of a wire 24 is fastened to the upper end of the reader 2, and a plurality of suspension sheaves 22 and a plurality of sheaves 26 rotatably supported by the upper end of the reader 2 are connected to each other. After that, it is wound around a sheave 28 rotatably supported at the upper end of the reader 2.

Further, the wire 24 is wound around a rotary drum 34 of a main winch 32 provided on the pile construction machine main body 1 via a sheave 30 rotatably supported in the middle of the leader 2, and the main winch 32. Drive mechanism 1 by driving
2. It is configured so that the pushing mechanism 18 can be moved up and down.

As shown in FIG. 3, the reader 2
Second guide rails 36 and 38 having a circular cross section are laid in parallel with the first guide rails 8 and 10, and the movable table 42 is connected to the second guide rails 36 and 38 via a plurality of guide gibs 40. It is slidably engaged along the guide rails 36 and 38.

One end of a wire 48 is fastened to the movable table 42. The wires 48 and 50 are wound around a pair of sheaves 52 and 54 rotatably supported on the upper end of the reader 2 and the leader 48 2 is wound around a drum 58 of a worktable winch 56 as a lifting / lowering drive mechanism attached to the lower end side surface of the work table 2.

As shown in FIGS. 3 and 4, a boarding platform 64 is supported by the movable platform 42 by a support shaft 66 parallel to the second guide rails 36 and 38 so as to be rotatable around the support shaft 66. I have. The boarding platform 64 includes a flat floor 68 on which an operator can board and a fence member 69 surrounding four floors 68, and it is sufficient if the board has at least a floor area large enough for one operator to board.

When the board 64 is rotated about the support shaft 66, the boarding platform 64 is moved to a storage position a (a position indicated by a solid line in FIG. 3).
The work table 70 and the auger drive mechanism 12 and the push mechanism 18 do not interfere with each other even if the push mechanism 18 is moved up and down.

At a working position b (position indicated by a two-dot chain line in FIG. 3) in which the platform 64 is rotated 90 degrees around the support shaft 66, the platform 64 is configured to approach the rotary shaft 72. ing. In this embodiment, the guide give 40,
The moving table 42 and the boarding table 64 constitute a work table 70. The pushing mechanism 18 is used at the time of the inside digging pile method, and may be provided as needed.

A turning drive mechanism 74 is provided on the work table 70. The turning drive mechanism 74 is, as shown in FIGS. 3 and 6, a hydraulic cylinder connected to the moving table 42 and the boarding table 64. 76 is provided. The hydraulic cylinder 76 has the control valve 7
8 and the control valve 78 is connected to a hydraulic pump 80.
And the hydraulic tank 82 are connected.

As shown in FIG. 6, the control valve 78 has a neutral position 78a, a right rotation position 78b, and a left rotation position 78c. At the neutral position 78a, all communication between the hydraulic cylinder 76 and the hydraulic pump 80 is cut off. At the right rotation position 78b, the B port of the hydraulic pump 80 is connected to the hydraulic tank 8
2, the A port of the hydraulic pump 80 is connected to the head side port of the hydraulic cylinder 76, and the rod side port of the hydraulic cylinder 76 is connected to the hydraulic tank 82. At the left rotation position 78c, the A port of the hydraulic pump 80 is connected to the hydraulic tank 8
2, the B port of the hydraulic pump 80 is connected to the head side port of the hydraulic cylinder 76, and the rod side port of the hydraulic cylinder 76 is connected to the hydraulic tank 82.

The hydraulic pump 80 is capable of reversible rotation.
When the operator rotates the handle 150 shown in FIG. 4, the pressure oil is discharged. When the handle 150 is turned clockwise,
Pressure oil is discharged from the B port, and when the handle 150 is rotated counterclockwise, the pressure oil is discharged from the A port.

Further, the control valve 78 is of a manual switching type.
The control valve 78 is switched to the right rotation position 78b, and the handle 1
The control valve 78 can be switched to the left rotation position 78c when the 50 is rotated counterclockwise, and can be switched to the neutral position 78a when the handle 150 is not operated.

In this embodiment, the hydraulic pump 80 and the control valve 78 as described above are those shown in FIGS. The control valve 78 is integrally formed with a hydraulic pump 80 using a colloid pump. The hydraulic pump 80 includes a side plate 86 attached to a side surface of the valve body 84,
Pump housing 9 sandwiched between side plate 86 and lid member 88
0, and a rotor 92 is housed in the pump housing 90. In the side plate 86, through holes 96 are formed corresponding to the plurality of pump chambers 94.

On the other hand, a large-diameter hole 98 is formed in the valve body 84, and four annular grooves 100 to 100 are formed in the large-diameter hole 98.
03 is formed. In each of the annular grooves 100 to 103,
The discharge hole 104, the first connection hole 105, the second connection hole 106, and the suction hole 107 communicate with each other. Discharge hole 104
The first connection hole 105 is connected to the head-side port of the hydraulic cylinder 76, and the second connection hole 106 is connected to the rod-side port of the hydraulic cylinder 76. .

A sleeve 108 is rotatably inserted into the large-diameter hole 98, and an operation shaft 110 is rotatably inserted into the sleeve 108. And large diameter hole 9
Numeral 8 is closed by a cap 112 and rotatably supports an operation shaft 110 via a thrust bearing 114. One end of the operation shaft 110 extends through the cap 112 to the outside.

The pin 11 is provided between the sleeve 108 and the operating shaft 110 so that relative rotation within a predetermined angle range is allowed.
6 and the sleeve 108 and the operating shaft 1
It is configured such that the biasing force of the leaf spring 118 is balanced at a predetermined angle between 10 and the predetermined angle. When the operation shaft 110 is rotated, the operation shaft 110 is configured to rotate together with a relative rotation angle difference. Further, the rotating shaft 117 inserted into the operating shaft 110 holds the pin 116 so that the operating shaft 110 and the rotating shaft 117 rotate integrally, and the rotating shaft 117 is Are connected so as to be integrally rotatable.

By the urging force of the leaf spring 118, the sleeve 1
08 and the operating shaft 110 are balanced in the middle of the predetermined angle, as shown in FIG.
3 is closed by a sleeve 108, and is configured to be in a neutral position 78a as shown in FIG.

The sleeve 108 has a plurality of through holes 120 communicating with the annular groove 100, a through hole 121 communicating with the annular groove 101, an annular groove 122 communicating with the annular groove 102, and a plurality of communicating holes with the annular groove 103. Are formed. A supply / discharge hole 124 is formed to communicate with each through hole 96 of the side plate 86, and each supply / discharge hole 124 communicates with the large-diameter hole 98. And each of the supply and discharge holes 1
24 and a plurality of through holes 125 in the sleeve 108.
Are formed.

When the operation shaft 110 is rotated clockwise, as shown in FIG. 8, a relative rotation angle difference is generated between the sleeve 108 and the operation shaft 110, and the rotation between the sleeve 108 and the pump chamber 94 in the suction process is generated. A communication groove 126 that communicates with the through hole 96 and the through hole 125 that communicates via the supply / discharge hole 124 is formed on the outer periphery of the operation shaft 110.

Further, a communication groove 127 communicating the through hole 121 and the through hole 121 communicating with the pump chamber 94 in the discharge step through the through hole 96 and the supply / discharge hole 124 is provided on the operating shaft 11.
0. Further, a communication groove 128 communicating the through hole 122 and the through hole 120 is formed on the outer periphery of the operation shaft 110 so that the control valve 78 is at the right rotation position 78b.

When the operation shaft 110 is rotated counterclockwise, as shown in FIG. 9, a relative rotation angle difference is generated between the sleeve 108 and the operation shaft 110, and the rotation angle between the sleeve 108 and the pump chamber 94 in the suction process is increased. A communication groove 129 that communicates with the through hole 96 and the through hole 125 that communicates through the supply / discharge hole 124 is formed on the outer periphery of the operation shaft 110.

Further, a communication groove 130 communicating the through hole 122 and the through hole 122 communicating with the pump chamber 94 in the discharge step through the through hole 96 and the supply / discharge hole 124 is provided on the operating shaft 11.
0. Further, a communication groove 131 communicating the through-hole 121 and the through-hole 120 is formed on the outer periphery of the operation shaft 110, so that the control valve 78 is at the left rotation position 78c.

On the other hand, as shown in FIGS.
A handle 150 is integrally attached to 10. In addition, the fence member 69 of the boarding base 64 has the locking pin 13
2 is slidably supported toward the moving table 42,
The locking pin 132 is urged by a coil spring 134 so as to protrude toward the movable table 42. Locking pin 13
A handle 135 is attached to the rear end of the handle 2, and when the operator pulls the handle 135 to slide the locking pin 132 and rotates the handle 135 by 90 degrees, the operator opposes the urging force of the coil spring 134. The locking pin 132 can be stopped so as not to protrude.

The locking table 1 provided on the moving table 42
36, a locking hole 138 into which the locking pin 132 can be inserted when the platform 64 is in the storage position a, and a locking pin 132 into which the locking pin 132 can be inserted when the platform 64 is in the working position b. A locking hole 140 is formed.

Next, the operation of the above-mentioned working table lifting / lowering device for a pile working machine of this embodiment will be described. Auger drive mechanism 1
2. Auger drill 1 inserted into the hollow inside of pile 71
While rotating 6, the pushing mechanism 18 applies a pressing force in the axial direction, and the pile 71 is built. Then, when erected at a predetermined depth, the auger drive mechanism 12 and the pushing mechanism 18 are driven along the first guide rails 8 and 10 by driving the main winch 32. Next, a new pile 71 is added and the auger drills 16 are connected.

Then, it is lowered to the lower end of the reader 2,
An operator gets on the boarding table 64 at the storage position a and drives the worktable winch 56 to raise the worktable 70 along the second guide rails 36 and 38 to near the tip of the auger drill 16. Next, the operator on the workbench 70 instructs another worker on the ground side to operate the main winch 32,
The auger drive mechanism 12 is lowered.

The operator on the work table 70 pulls the handle 135, pulls out the locking pin 132 from the locking hole 138, rotates the handle 135 by 90 degrees, and moves the locking pin 132 into the locking hole 13
8 and hold it. Next, handle 15
0 is rotated clockwise to drive the hydraulic pump 80.

The operation of the handle 150 causes a relative angle difference between the sleeve 108 and the operation shaft 110, and the control valve 78 is switched to the right rotation position 78b.
Therefore, the hydraulic oil in the hydraulic tank 82 is sucked into the hydraulic pump 80 through the suction hole 107, the annular groove 103, the through hole 123, the communication groove 126, the through hole 125, and the supply / discharge hole 124 as shown in FIG. Is done.

The hydraulic oil discharged from the hydraulic pump 80 is supplied to the hydraulic oil via the through-hole 96, the supply / discharge hole 124, the through-hole 125, the communication groove 127, the through-hole 121, the annular groove 101, and the first connection hole 105. It is supplied to the head side port of the cylinder 76. The hydraulic oil from the rod-side port of the hydraulic cylinder 76 receives the second connection hole 106, the annular groove 102, the through hole 122, the communication groove 128, the through hole 120, the annular groove 10
0, returned to the hydraulic tank 82 through the discharge hole 104.

Accordingly, the hydraulic cylinder 76 is driven to the extension side, and the platform 64 is turned around the support shaft 66.
The boarding base 64 is turned from the storage position a around the support shaft 66, moved to a work position b indicated by a two-dot chain line in FIG. 3, and the boarding base 64 approaches the auger drill 16.

When the rotation of the handle 150 is stopped, the relative angular difference between the sleeve 108 and the operation shaft 110 is eliminated by the urging force of the leaf spring 118, and the control valve 78 is stopped.
Is switched to the neutral position 78a. When the handle 135 is gripped, rotated 90 degrees and released, the locking pin 132 is inserted into the locking hole 140 by the urging force of the coil spring 134, and restricts the boarding base 64 from turning around the support shaft 66.

For example, in the connection operation, the auger drive mechanism 1
The auger drill 16 is inserted into the hexagonal hole formed in the second rotation shaft 72.
Since the hexagonal shaft at the end of the auger drill 16 is inserted, it is necessary to connect the rotary shaft 72 and the auger drill 16 in phase. At this time, the operator moves the auger drill 16 and aligns the cores so that the phases match, while instructing the operator on the ground to perform the inching operation of the rotating shaft 72. Auger drill 1
6 is inserted, the operator on the workbench 70
Insert the connecting pin into the pin insertion hole by hammering or the like.

Next, after the connection work is completed, the handle 1 is again turned on.
The hydraulic pump 80 is driven by rotating the pump 50 counterclockwise. Also,
The operation of the handle 150 causes a relative angular difference between the sleeve 108 and the operation shaft 110, and the control valve 78 is switched to the left rotation position 78c. Therefore, the hydraulic tank 8
As shown in FIG. 9, the hydraulic oil in the suction hole 107, the annular groove 103, the through hole 123, the communication groove 129, and the through hole 12
5. The oil is sucked into the hydraulic pump 80 through the supply / discharge hole 124.

The hydraulic oil discharged from the hydraulic pump 80 is supplied to the hydraulic oil through the through-hole 96, the supply / discharge hole 124, the through-hole 125, the communication groove 130, the through-hole 122, the annular groove 102, and the second connection hole 106. It is supplied to the rod side port of the cylinder 76. Hydraulic oil from the head side port of the hydraulic cylinder 76 is supplied to the first connection hole 105, the annular groove 101, the through hole 121, the communication groove 131, the through hole 120, the annular groove 10
0, returned to the hydraulic tank 82 through the discharge hole 104.

Accordingly, the hydraulic cylinder 76 is driven to the reduction side, and the boarding base 64 turns around the support shaft 66 toward the storage position a. When the storage position a is reached, the rotation operation of the handle 150 is stopped. Therefore, the control valve 7
8 is switched to the neutral position 78a by the urging force of the leaf spring 118, and the driving of the hydraulic cylinder 76 is stopped. By operating the handle 135 and inserting the locking pin 132 into the locking hole 138 to regulate the turning of the boarding platform 64, the workbench winch 56 is driven to lower the workbench 70.

As described above, since the boarding base 64 can be turned by operating the handle 150, the accessibility can be improved with a simple configuration. Further, since the hydraulic cylinder 76 can be driven without connecting a hydraulic hose from the hydraulic source of the pile construction machine body 1 to the hydraulic cylinder 76, disconnection or the like due to hooking of the hydraulic hose can be avoided by routing the hydraulic hose to the workbench 70 that moves up and down. Further, by selecting the discharge amount per one rotation of the hydraulic pump 152 and the cylinder diameter of the hydraulic cylinder 76, the handle 150 can be rotated with a small force, and the operation becomes easy.

On the other hand, as shown in FIG. 10, the discharge side of a hydraulic pump 152 driven by a motor (not shown) is connected to the suction hole 107 of the control valve 78 to reduce the discharge pressure.
54, the steering wheel 1
By operating the board 50, the boarding board 64 can be turned.
At this time, the hydraulic cylinder 76 is driven by the hydraulic oil supplied from the hydraulic pump 152, so that the handle 150
Can be easily rotated, and even when heavy luggage or the like is mounted on the boarding platform 64, the vehicle can be easily turned.

Next, a second embodiment different from the above-described embodiment will be described with reference to FIG. The same members as those described above are denoted by the same reference numerals, and detailed description is omitted. Instead of the above-described turning drive mechanism 74, in the turning drive mechanism 155 of the second embodiment, a gear 156 is fixed to the moving table 42 coaxially with the support shaft 66.
Is meshed with a gear 160 attached to the output side of the speed reducer 158 provided on the boarding platform 64.

A handle 150 is provided on the input side of the speed reducer 158.
By rotating the handle 150, the gear 160 is rotated via the speed reducer 158, and the boarding base 64 is turned around the support shaft 66. Even in this case, the board 64 can be turned without particularly providing a drive source, and the boarding base 64 can be turned with a simple configuration.

As described above, the present invention is not limited to such an embodiment, and can be carried out in various modes without departing from the gist of the present invention.

[0051]

As described above in detail, the working table lifting / lowering device for a pile construction machine according to the present invention is operated by operating a handle provided on the boarding platform.
The boarding board can be turned by the
Breakage of the hydraulic hose by pulling in the hydraulic hose
Can be avoided , and the accessibility can be improved with a simple configuration. In the case where the turning drive mechanism is provided with a hydraulic pump driven by the rotation of the handle , the hydraulic cylinder can be driven without connecting the hydraulic hose from the outside of the workbench. Can be avoided. Further, when the turning drive mechanism includes a hydraulic pressure source, the boarding board can be turned with a lighter force.

In addition, when the turning drive mechanism is provided with a speed reducer, the accessibility can be improved with a simpler configuration. Furthermore, by providing a locking pin and a locking hole,
The turning of the swivel base can be restricted, and safety can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a pile construction machine provided with a work bench lifting device for a pile construction machine as one embodiment of the present invention.

FIG. 2 is a side view of a pile construction machine provided with a pile construction machine worktable lifting / lowering device of the present embodiment.

FIG. 3 is an enlarged plan view when the workbench of the workbench lifting / lowering device for a pile construction machine according to the present embodiment is at a storage position.

FIG. 4 is an enlarged front view of the workbench lifting / lowering device for a pile construction machine according to the present embodiment.

FIG. 5 is an enlarged sectional view of a locking pin and a locking hole according to the present embodiment.

FIG. 6 is a hydraulic circuit diagram of a workbench lifting / lowering device for a pile construction machine according to the present embodiment.

FIG. 7 is an enlarged sectional view of the control valve and the hydraulic pump according to the embodiment.

FIG. 8 is an enlarged cross-sectional view of the control valve and the hydraulic pump when the control valve of the present embodiment switches to the right rotation position.

FIG. 9 is an enlarged cross-sectional view of the control valve and the hydraulic pump when the control valve of the present embodiment switches to the left rotation position.

FIG. 10 is a hydraulic circuit diagram of a workbench lifting / lowering device for a pile builder according to an embodiment in which the turning drive mechanism includes a hydraulic source.

FIG. 11 is an enlarged front view of a workbench elevating device for a pile construction machine as a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pile construction machine main body 2 ... Leader 12 ... Auger drive mechanism 42 ... Moving table 56 ... Work table winch 64 ... Boarding table 66 ... Support shaft 70 ... Work table 74, 155 ... Rotation drive mechanism 76 ... Hydraulic cylinder 78 ... Control Valve 80 hydraulic pump 110 operating shaft 132 locking pin 138, 140 locking hole 150 handle 158 reduction gear

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 7/16 E04G 3/04

Claims (5)

(57) [Claims] 1. A pile construction machine for elevating and lowering a construction mechanism along a first guide rail provided on a standing leader, comprising: a second guide rail provided on the leader in parallel with the first guide rail; a movable carriage which is movably supported along, provided with a worktable and a boarding platform pivotally supported on said movable table is provided with a lifting drive mechanism for vertically moving the working table, also the boarding platform A workbench lifting and lowering device for a pile construction machine, wherein a swing drive mechanism for turning the boarding board by driving the handle provided on the workbench is provided on the workbench. 2. The turning drive mechanism includes a hydraulic cylinder for turning the boarding platform, and a hydraulic pump driven by rotation of the handle , and the hydraulic cylinder is rotated by the rotation of the handle in accordance with a rotation direction. The workbench elevating device for a pile construction machine according to claim 1, further comprising a control valve connected to the hydraulic pump. 3. The turning drive mechanism includes a hydraulic source, and connects the hydraulic cylinder and the hydraulic pump in accordance with a rotation direction by rotating the handle , and connects the hydraulic source to a suction side of the hydraulic pump. The workbench elevating device for a pile construction machine according to claim 2, further comprising a control valve to be connected. 4. The work table lifting and lowering device for a pile construction machine according to claim 1, wherein the turning drive mechanism turns the boarding table via a reduction gear by rotating the handle . 5. The boarding platform is provided with a locking pin slidable toward the moving table, and the moving table has a locking hole into which the locking pin can be inserted. The workbench lifting and lowering device for a pile construction machine according to claim 1.