JP2002047878A - Elevating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating device capable of increasing the force of pulling out an excavating device without increasing a burden on a rack caused by load. SOLUTION: This elevating device 1 has a rack 10 provided along the axial direction of a leader 4 erected at the front part of a.base machine 2, and a rack elevator 14 elevated along the rack 10 by rotationally driving a pinion 16 meshed with the rack 10. The elevating device 1 further has fixed blocks 30 provided at the uppermost part of the leader 4; an auxiliary elevator 22 provided above the rack elevator 14 and provided with a running block 23 suspended from the fixed block 30 by a wire rope 26; a winch 24 for elevatingly driving the auxiliary elevator 22 through the wire rope 26; and a connecting device 21 for detachably connecting the rack elevator 14 and the auxiliary elevator 22 to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for lifting a working device such as an auger or a hammer for excavating a pile driver.

[0002]

2. Description of the Related Art Conventionally, as an elevating device for elevating a working device such as a digging device of a pile driver or a hammer, the one shown in FIG. 8 is known. That is, the lifting device 100
A rack 106 and a guide pipe 108 are provided along the axial direction of a reader 104 erected at the front of the base machine 102, and a rack for raising and lowering an excavator 110 slidably attached to the guide pipe 108. The elevator 112 is connected by connecting means 113. A pinion 114 is provided on the rack elevator 112 so as to mesh with the rack 106.
As a result, the rack elevator 116 moves up and down along the rack 106, and accordingly, the excavator 110 connected to the rack elevator 112 moves up and down along the guide pipe 108.

Here, the lifting device 100 having such a configuration is described.
In this case, the rack elevating device 110 is driven by the material strength of the rack 106 and the pinion 114 and the rotational torque of the pinion 114.
The maximum force when the digging rig 110 is lifted is determined. However, depending on the construction method, there are cases where the excavator 110 needs to be lifted with a force larger than the force by which the rack elevator 110 lifts the excavator 110. The following can be considered as a method for dealing with such a case.

That is, as shown in FIG. 9, there is a method in which two rack elevators 112 are connected to pull up the excavator 110. By doing so, the force for lifting the excavator 110 can be increased.

[0005]

However, as described above, the lifting and lowering device 1 having two rack lifting and lowering devices 112 connected thereto.
In the case of 00, the lifting / lowering force applied to the excavator 110 is doubled, but the pull-out reaction force applied to the rack 106 is also doubled, so that there is a problem that the load is applied to the rack 106. As a result, the strength of the bolt for fixing the rack to the reader 4 must be increased, and the bolt may be loosened. In addition, the use of the two rack elevators 112 increases the weight, thereby deteriorating the stability of the entire lifting apparatus 100 and further increasing the cost.

The present invention has been made to solve the above problems. That is, the subject is
An object of the present invention is to provide an elevating device having a simple structure capable of increasing a pulling force of an excavator without increasing a load due to a load on a rack.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a rack provided along the axial direction of a leader erected at the front of a base machine, and a rack meshed with the rack. A lifting device having a first lift that moves up and down along the rack by rotating and driving a pinion; a constant pulley provided at the top of the reader;
A second elevator provided above the first elevator and having a moving pulley suspended from the constant pulley by a wire rope, and an elevating drive unit for driving the second elevator up and down via the wire rope; It has a connecting means for connecting the first elevator and the second elevator.

According to the lifting device having the above-described structure, the first lifting device is moved up along the rack by the rotation of the pinion, and the first lifting device pulls out the excavating device by the rising force. Further, the second elevator is provided with a moving pulley, which is suspended by a wire rope from a constant pulley located at the top of the leader by the moving pulley, and wherein the second elevator is provided with the lifting drive means. With this, it moves up and down along the reader via the wire rope. Then, the first elevator and the second elevator are connected by connecting means.
Therefore, in the pulling-out operation of a normal excavator such as an auger, the first elevator and the second elevator are separated from each other, and
Then, the pinion is driven to rotate and the first pinion is moved along the rack.
The elevator is raised, and the excavator is withdrawn only by the force by which the first elevator is raised. Then, when a force greater than the force of the first elevator when lifting the excavator is required, the first elevator and the second elevator are connected, and the first elevator is moved up along the rack and (2) The lift is also raised by the lifting drive means via the wire rope. Then, both the force for raising the first elevator and the force for raising the second elevator are applied to the excavator. Therefore, a large force is applied to the excavator as compared with the case where only the first elevator is raised, so that the excavator is pulled out even when a larger force is required when the excavator is pulled out. be able to. At this time, the second
The lift is suspended from the constant pulley by a wire rope, and the second lift is moved up and down by the wire rope, so that the load of the second lift is applied to the wire rope,
Accordingly, the load of the second elevator is not applied to the rack.
As described above, the lifting device of the present invention can increase the force for pulling out the excavator without increasing the load due to the load on the rack.

Further, in the lifting device according to the present invention, the connecting means is provided on an upper surface of the first lifting device and is provided on a first bracket having a first engagement hole and a lower surface of the second lifting device. A second bracket having a second engagement hole so as to overlap with the first engagement hole when connecting the first elevator and the second elevator; and the first engagement hole. A pin that can be inserted into and removed from the first engagement hole and the second engagement hole in a state in which the pin and the second engagement hole overlap each other; and pin driving means that drives the pin in the insertion and removal direction. It is characterized by having.

[0010] In the lifting device having the above-described structure, the first bracket is provided on the upper surface of the first lifting device, and the second bracket is provided on the lower surface of the second lifting device. When connecting the first elevator and the second elevator, the first engagement hole opened in the first bracket and the second engagement hole opened in the second bracket.
The engagement hole overlaps. In this state, the pin driving means is driven to insert the pins into the overlapped first and second engagement holes. Thus, the first elevator and the second elevator are connected. When the first elevator and the second elevator are disengaged, the pin driving means is driven to remove the pins from the inside of the first engagement hole and the inside of the second engagement hole. As described above, the lifting device having the above-described configuration can insert and remove the pin into the first engagement hole and the second engagement hole by driving the pin driving unit, and thereby, the first lifting device and the second lifting device It is not necessary to manually pass the pins into the first engagement hole and the second engagement hole when connecting. Therefore, the first elevator and the second
It can be easily attached to and detached from the elevator.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a lifting device according to the present invention.

First, the structure of the entire lifting device will be described with reference to FIGS. As shown in FIG.
In the figure, a reader 4 is provided upright on a front part of a self-propelled base machine 2 with an arm 6 and a back stay 7. As shown in FIGS. 1 and 2, two guide pipes 8, 8 are provided at the front of the leader 4 along the axis of the leader 4,
Between the guide pipes 8, a rack plate 10 is attached to the reader 4 by bolts (not shown) in the axial direction with substantially the same length as the guide pipes 8, 8. Teeth 10A, 10A are formed. Further, an auger screw excavator 12 is provided at the front of the leader 4, and the excavator 12 is connected to a rack elevator 14 on the upper surface thereof. The excavator 12 has guide gibs 12A, 12A slidably attached to the guide pipes 8, 8, whereby the excavator 12 is moved up and down by the rack elevator 14 along the guide pipes 8, 8.

The rack elevator 14 is provided with pinions 16 and 16 and a driving device 18 for the pinions.
Are provided so as to mesh with the rack teeth 10A, 10A. The driving device 18 has two hydraulic motors 20 and 20 having the same hydraulic pressure source and independently driving the pair of pinions 16 and 16, and reduces the driving force of the hydraulic motors 20 to the respective pinions 16 and 16. And a speed reducer 25 for transmitting the pressure. When the driving device 18 is driven, the two pinions 16, 16 rotate to roll the rack teeth 10A, 10A while sandwiching the rack 10, thereby causing the rack elevator 1 to rotate.
4 goes up and down.

Further, an auxiliary elevator 22 is provided above the rack elevator 14, and the auxiliary elevator 22 is provided with two guide gibs 22A, 22A as shown in FIG. Guide pipe 8,
8 and slidable. Thereby, the auxiliary elevator 2
Numeral 2 can move up and down along the reader 4. further,
As shown in FIGS. 4 and 5, the rack elevator 14 is provided on the upper surface of the rack elevator 14 and the lower surface of the auxiliary elevator 22.
There is provided a connecting device 21 to be described later that connects the auxiliary elevator 22 to the auxiliary elevator 22 in a detachable manner.

A movable pulley 23 is provided on the auxiliary elevator 22, a winch 24 is provided inside the rear of the base machine 2, and a wire rope 26 is wound around the winch 24. The wire rope 26 wound around the winch 24 is moved from the guide pulley 28 provided at the front of the base machine 2 to the constant pulleys 30 and 3 provided at the upper part of the reader 4.
0, and the moving pulley 22 of the auxiliary elevator 22
The end of the wire rope 26 is fixed to the top of the reader 4. Thereby, the auxiliary elevator 22 is suspended from the fixed pulley 30 via the wire rope 26 by the moving pulley 23. Therefore, the wire rope 26
In the direction of winding (counterclockwise in FIG. 1).
Is driven, the pulley 23 is moved by the wire rope 25.
As a result, the auxiliary elevator 22 slides up the guide pipe 8 attached along the axis of the reader 4 and rises. Further, when the winch 26 is driven in the direction in which the wire rope 26 is pulled out (clockwise in FIG. 1), the auxiliary elevator 22 is driven by the guide pipe 8 attached along the axis of the reader 4 by its own weight.
To slide down.

Next, the connecting device 21 formed on the upper surface of the rack elevator 14 and the lower surface of the auxiliary elevator 22 will be described with reference to FIGS. In the connecting device 21, two brackets 21 </ b> A,
21A are formed, and engagement holes 21B, 21B are formed in the brackets 21A, 21A. On the upper surface 14A of the rack elevator 14, two sets of brackets 2 are provided.
1C and 21C are formed in two sets, and as shown in FIG.
Each bracket 21A, 21A formed on the lower surface 22A of the auxiliary elevator 22 is inserted between a corresponding pair of brackets 21C, 21C. Furthermore, the brackets 21C, 21C have the engaging holes 2
1D and 21D are open. Then, as shown in FIG. 7, the bracket 21A is attached to the brackets 21C and 21C.
When inserted between C, the engagement hole 21B and the engagement holes 21D, 21D just overlap in a straight line. Further, a pin 21 is provided on the upper surface of the rack elevator 14.
E and 21E are the engagement holes 21B, 21D and 21D of each set.
The hydraulic cylinder 2 is provided so that it can be inserted into and removed from the inside of the hydraulic cylinder 2.
1F and 21F are provided.

The operation of the lifting apparatus of the present embodiment having the above-described configuration will be described by taking as an example a case where the excavator 12 of the auger screw buried underground is pulled out.
First, the wire rope 26 is wound up by the winch 24, and the auxiliary elevator 22 is retracted near the uppermost portion of the reader 4 as shown in FIGS. Then, the drive unit 18 drives the pinion 16 to raise the rack elevator 14. Then, the excavator 12 of the auger screw is pulled out from the ground by the force by which the rack elevator 14 rises.

Here, when the excavator 12 cannot be pulled out only by the lifting force of the rack elevator 14, first, as shown in FIGS. 4 and 5, the winch 24 is driven to rotate in the direction in which the wire rope 26 is pulled out. Then, the auxiliary elevator 22 is lowered along the guide pipe 8. Then, the auxiliary elevator 22 and the rack elevator 14 are connected to the connecting device 2.
Connect with 1.

At this time, as shown in FIG. 7, two sets of brackets 21C and 21C formed on the upper surface of the rack elevator 14 are provided.
A bracket 21A formed on the lower surface 22B of the auxiliary elevator 22 is inserted between the brackets 21C. Then, bracket 2
The engagement holes 21D and 21D formed in 1C and 21C and the engagement hole 21B formed in the bracket 21A overlap in a straight line. Here, the hydraulic cylinders 21F, 21F
By driving E, the pin 21E is inserted into the engagement holes 21D, 21D and 21A. Thus, the rack elevator 1
4 and the auxiliary elevator 22 are connected. When the rack elevator 14 and the auxiliary elevator are separated from each other, the engagement holes 21
D, 21D and 21A.
1E is driven. Therefore, when connecting the rack elevator 14 and the auxiliary elevator 22, it is not necessary to manually insert and remove the connecting pins inside the engagement holes 21 </ b> D, 21 </ b> D and 21 </ b> A. It can be easily attached and detached.

After the connection between the rack elevator 14 and the auxiliary elevator 22 is completed, the rack elevator 14 is raised and the wire rope 26 is wound up by the winch 24 to raise the auxiliary elevator 22. Then, a force for pulling out the excavator 12 is exerted on the excavator 12 by raising the rack elevator 14, and a force for pulling out the excavator 12 is exerted by raising the auxiliary elevator 22. Accordingly, a greater force is applied to the digging device 12 than when the digging device 12 is pulled out only by raising the rack elevator 14, and even if the digging device 12 cannot be pulled out and pulled out only by the pulling force of the rack lifting device 14, the digging device 12 can be withdrawn. At this time, the auxiliary elevator 22 is lifted by pulling up the movable pulley 23 of the auxiliary elevator 22 to the upper part of the reader 4 by the wire rope 26, so that the pulling load of the auxiliary elevator 22 is
This causes the rack 8 to include the auxiliary elevator 22
No pulling reaction force is applied. Thus, even when a force higher than the force by which only the rack elevator 14 is lifted when the drilling device 12 is pulled out is required, the drilling device 12 is pulled out without applying the pulling-out reaction force of the auxiliary lift 22 to the rack 8. be able to.

As described above in detail, the lifting apparatus 1 of the present embodiment comprises a rack 10 provided along the axial direction of the reader 4 erected at the front of the base machine 2; And a rack elevator 14 that rises and descends along the rack 10 by rotating and driving the pinion 16 meshed with the rack 4. The constant pulley 30 provided at the uppermost part of the reader 4 and the rack elevator 1
4, an auxiliary elevator 22 having a movable pulley 23 suspended from the constant pulley 30 by a wire 26, a winch 24 for driving the auxiliary elevator 22 up and down via the wire 25, and a rack Since the connecting and connecting device 21 for detachably connecting the elevator 14 and the auxiliary elevator 22 is detachably provided, even when the excavator 12 needs to be pulled out only by the rack elevator 14 when pulling out the excavator 12, the rack 8 can be used. Auxiliary elevator 22
It is possible to pull out the excavator 12 without applying a pull-out reaction force, thereby making it unnecessary to increase the strength of bolts for attaching the rack 8 to the reader 4 and to take measures to prevent the bolts from loosening. There is no. Further, in the lifting device 1 of the present embodiment, the auxiliary lifting device 22
Is a simple structure provided with an appropriate number of moving pulleys 23,
The cost can be reduced as compared with the case where two rack elevators are mounted. Furthermore, the weight can be made very light as compared with the case where two rack elevators are attached, whereby the weight of the entire elevating device 1 can be lightened. Therefore, the lifting device 1 can be erected in front of the base machine 2 in a stable state.

The coupling device 21 is provided on the upper surface of the rack elevator 14 and has a bracket 21A having an engagement hole 21B formed therein. The coupling device 21 is provided on the lower surface of the auxiliary elevator 22 and is connected to the rack elevator 14 and the auxiliary elevator 22. A bracket 21C in which an engagement hole 21D is opened so as to overlap with the engagement hole 21B when connecting
A pin 21E which can be inserted into and removed from the engagement hole 21B and the engagement hole 21D in a state where the engagement hole 1D and the engagement hole 21D overlap each other;
1E in the insertion / removal direction with the hydraulic cylinder 21F.
Since there is no need to manually pass the pins into the 1C and 21C, the rack elevator 14 and the auxiliary elevator 22 can be easily connected.

The present embodiment is merely an example and does not limit the present invention. Therefore, naturally, the present invention can be variously modified and improved without departing from the gist thereof. For example, in the present embodiment, brackets 21 </ b> C formed on the upper surface of the rack elevator 14,
Although the bracket 21A formed on the lower surface 22B of the auxiliary elevator 22 is inserted between 21C,
Conversely, a structure may be adopted in which two sets of brackets are formed on the auxiliary elevator 22 and the bracket of the rack elevator 14 is inserted between them. Furthermore, the number of brackets formed on the rack elevator 14 and the auxiliary elevator 22 is not limited to the number in the present embodiment. The hydraulic cylinder 21F may be provided on either the rack elevator 14 or the auxiliary elevator 22, and the hydraulic cylinder 21F may be an air cylinder or another driving device.

[0024]

The lifting device according to the present invention comprises a rack provided along the axial direction of a leader erected at the front of a base machine, and a pinion meshed with the rack being rotated to drive the rack. A first elevator that rises and descends along a fixed pulley provided above the leader, and is suspended above the first elevator by a wire rope from the constant pulley. A second elevator having a movable pulley, an elevator drive means for driving the second elevator up and down via the wire rope, and a coupling means for coupling the first elevator and the second elevator. The force for pulling out the excavator can be increased without increasing the load due to the load on the rack, thereby increasing the strength of the bolt for attaching the rack to the leader. There is no need to for further there is no need for locking measures bolts attaching the rack to the reader. Further, in the lifting device of the present invention, the second lifting device has a simple structure in which an appropriate number of moving pulleys are provided, so that the cost can be reduced as compared with a case where two rack lifting devices are mounted. Furthermore, the weight can be made very light as compared with the case where two rack elevators are attached, whereby the weight of the entire elevating device can be lightened. Therefore, the lifting device can be erected in front of the base machine in a stable state.

Further, in the lifting device according to the present invention, the connecting means is provided on an upper surface of the first lifting device and is provided on a first bracket having a first engagement hole and a lower surface of the second lifting device. A second bracket having a second engagement hole so as to overlap with the first engagement hole when connecting the first elevator and the second elevator; and the first engagement hole. A pin that can be inserted into and removed from the first engagement hole and the second engagement hole in a state in which the pin and the second engagement hole overlap each other; and pin driving means that drives the pin in the insertion and removal direction. Since the pin does not need to be manually passed through the first engagement hole and the second engagement hole at the time of connection, the first elevator and the second elevator can be easily connected.

[Brief description of the drawings]

FIG. 1 is a side view showing a state where an elevating device according to the present embodiment is erected by a base machine.

FIG. 2 is a front view showing a state where the elevating device according to the present embodiment is erected.

FIG. 3 is a top view of the auxiliary elevator according to the embodiment.

FIG. 4 is a side view showing a state where the elevating device according to the embodiment is erected by a base machine, and is a diagram showing a state where a rack elevator and an auxiliary elevator are connected.

FIG. 5 is a front view showing a state where the elevating device according to the present embodiment is erected, and is a diagram showing a state where the rack elevator and the auxiliary elevator are connected.

FIG. 6 is a diagram showing a state in which the rack elevator and the auxiliary elevator are not connected in the connection device of the present embodiment.

FIG. 7 is a diagram showing a state in which a rack elevator and an auxiliary elevator are connected in the connection device of the present embodiment.

FIG. 8 is a view showing a state where a conventional elevating device is erected by a base machine.

FIG. 9 is a diagram showing a conventional elevating device in which two rack type elevating devices are connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating device 2 Base machine 4 Reader 10 Rack 12 Drilling device 14 Rack elevating device 16 Pinion 21 Connecting device 22 Auxiliary elevating device

Claims (2)

[Claims] 1. A rack provided along an axial direction of a leader erected at a front part of a base machine, and a first pinion meshed with the rack is driven to rotate so as to ascend and descend along the rack. A lift device having a lift, a second pulley provided above the leader and a movable pulley provided above the first lift and suspended from the constant pulley by a wire rope. An elevating device comprising: an elevating device; elevating driving means for driving the second elevating device up and down via the wire rope; and connecting means for connecting the first elevating device and the second elevating device. 2. The lifting device according to claim 1, wherein the connecting means is provided on an upper surface of the first elevator and has a first engagement hole, and a lower surface of the second elevator. And the first
When connecting the elevator and the second elevator, the first
A second engagement hole is formed so as to overlap with the engagement hole.
A bracket, a pin that can be inserted and removed in the first engagement hole and the second engagement hole with the first engagement hole and the second engagement hole overlapping each other; An elevating device comprising a pin driving means for driving in an insertion / removal direction.