JPH10205261A - Raising/lowering device of excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to execute raising/lowering operation of a revolving boring machine in a state to combine a base machine therewith. SOLUTION: A reaction taking rod 123 is mounted on a crane 10 as a base machine and a full revolving boring machine 60 in a turnable manner. A raising/ lowering link 124 is mounted between the crane 10 and full revolving boring machine 60 so as to make approximately parallel link with the reaction taking rod 123, and the raising and lowering link 124 is driven with a raising/lowering jack 121 as a driving source of an earth moving device. By the constitution, the raising/lowering of the full revolving boring machine 60 can be executed in a state to combine the base machine 10 therewith by exclusively raising/ lowering construction without using any boom.

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 an excavator used for forming cast-in-place piles constructed by, for example, an all-casing method.

[0002]

2. Description of the Related Art Excavation work is performed in an in-situ foundation pile construction work using an excavator in which a base machine and a revolving boring machine are combined. Specifically, as shown in FIG. 8, for example, a crawler crane 10 is used as a base machine, and a full-turn boring machine 60 is used as a rotary boring machine, and the casing tube 70 is rotated by the full-turn boring machine 60. The excavation bucket 50 suspended from the crawler crane 10
(Bucket) for excavation work (all casing method).

More specifically, a crawler crane 10 serving as a base machine used in this excavator is as follows. That is, the crawler crane 10 includes a lower traveling unit 20 related to traveling and an upper revolving unit 30 on which a working device is mounted. The lower traveling unit 20 includes a track frame 22, a car body 23, and the like.

[0004] Here, the track frame 22 is made of a steel plate beam. A sprocket wheel 25 is provided at the rear of the vehicle, and an idle wheel 26 is provided at the front. A number of lower rollers 27 are provided on the lower surface (the lower surface of the beam) of the track frame 22 so as to roll while supporting the machine weight on the crawler 21 which starts infinitely.

The sprocket wheel 25 and the crawler 21 wound around the sprocket wheel 25 are meshed with each other with teeth. The sprocket wheel 25 is rotated by an oil motor 24 provided on the track frame 22 so that the entire crawler crane 10 is rotated. You can move forward and backward. The track frame 22
Are usually provided on both the left and right sides, and further provided with driving devices (oil motors 24 and the like) respectively. When the left and right oil motors 24 are rotated forward, they are moved forward. When the direction is changed, the crawler crane 10 turns.

[0006] The car body 23 is
A turning bearing (not shown) is provided on the upper surface of the car body 23. Normally, an inner race (not shown) of the slewing bearing is supported by a track frame 22 of the lower traveling body 20, and an outer race (not shown) is supported by a swing arm 31 forming a chassis of the upper slewing body 30. 30 is supported rotatably.

Here, an internal gear is formed (by gear cutting) on the inner diameter side of the inner race. These teeth mesh with a pinion gear (not shown) mounted on an output shaft of a swing motor (not shown) provided on the upper swing body 30, and the upper swing body 30 is rotated by a driving force generated from the swing motor. It can be driven.

The upper swivel 30 is provided with a boom 32, a cabin 33, an engine unit 34, a counter weight 35, a main winch, a supplementary wint, a boom hoisting winch (all not shown) on a swing arm 31 serving as a chassis. Is configured.

Here, the main winding winch is attached to the main winding winch.
And the auxiliary winch 37 is wound around the auxiliary wind. The end of the main winding wire 36 is suspended via sheaves 40 and 41 provided at the end of the boom, and the excavation bucket 50 is suspended. The end of the auxiliary wire 37 passes through sheaves 40 and 42 at the end of the boom, and is connected to the crown 5.
2 is suspended.

A boom hoisting rope 38 is wound around the boom hoisting winch. This boom hoisting rope 38
The sheave 43 provided at the tip of the A frame 39 that supports the reaction force of the undulating rope 38 and the spreader 44 are multiplexed. Then, the tip of the boom 32 and the spreader 44
Is connected by a guy cable 45 that supports the boom 32, and the inclination angle of the boom 32 can be changed by rotating the boom hoisting winch.

On the other hand, a full turning boring machine 60 which is a turning type boring machine includes a base frame 61, an outrigger 62, a bearing case 63, a turning motor 6
4. It is configured by combining a drawing cylinder 65 and the like.

More specifically, the base frame 61 is installed by an outrigger 62 so as to be horizontal.
The bearing case 63 is supported on the base frame 61 by a drawing cylinder 65. A swivel bearing (not shown) is provided inside the bearing case 63. The swivel bearing supports a clamp device (not shown) for clamping the casing tube 70. A gear (not shown) that meshes with a pinion gear mounted on an output shaft of a swing motor 64 composed of an oil motor mounted on a drawing cylinder 65 is formed on the outer diameter portion of the swing bearing (gear cutting). ), And the casing tube 70 clamped by the clamp device is rotationally driven by the driving force generated from the turning motor 64.

A casing tube 70, a clamping device,
The revolving motor 64 is adapted to move up and down with respect to the base frame 61 together with the bearing case 63 by a drawing cylinder 65 so that the casing tube 70 is pushed into the soil while rotating.

However, the casing tube 70 is extended by a lock pin (not shown) every predetermined length, and a first tube 71 at the tip of the casing tube 70 is provided with a drilling bit 72.
Is provided at the upper end of the casing tube 70, and a grab guide 73 (a guide for guiding the excavation basket 50 into the casing tube 70).

The full swing boring machine 60 and the crawler crane 10 are connected by a reaction force taking frame 66, and the reaction force generated by the full swing boring machine 60 and rotating by the full swing boring machine 60 is used by the crawler crane. I am trying to catch it at 10.

The reference numeral 80 denotes a full-turn boring machine 6
0, ie, a power unit for generating hydraulic power for driving the all-spinning boring machine 60, and includes a diesel engine, a hydraulic pump, a hydraulic pump, and the like. The power unit 80 is connected to the full swing boring machine 60 via a hydraulic hose 81 so that necessary pressure oil can be sent to the full swing boring machine 60.

The excavation work by such an excavator includes:
First, the power unit 80 is driven to send pressure oil to the all-slewing boring machine 60, and the clamping device, the slewing motor 64, and the drawing cylinder 65 are operated. Then, the casing tube 70 is clamped by the clamp device,
While being rotated by the swing motor 64, it is pushed into the soil by the drawing cylinder 65.

During this time, the operation of the crawler crane 10
Using a digging bucket 50 suspended from the crane 10,
While excavating the inside of the casing tube 70, an operation of discharging the excavated soil to a position avoiding the casing tube 70 which becomes an excavation hole is performed.

More specifically, as the excavating work, first, the excavating bucket 50 suspended by the crawler crane 10 is lowered into the casing tube 70, and then the winch is released from a certain height and dropped.

Then, the shell 51 opened at the tip of the excavation bucket 50 is pushed into the soil. When the winch is wound up from this state, the excavation bucket 50
1 is closed and rolled up with earth and sand inside.

When the head 53 attached to the upper part of the excavating bucket 50 is fitted into the crown 52, the winch is stopped from being wound up, and the upper revolving unit 30 of the crawler crane 10 is turned, for example, about 90 ° so as to avoid the casing tube 70. For example, the excavating bucket 50 is guided above a shear box (not shown) placed beside the crawler crane 10.

Next, the main winch suspending the excavating bucket 50 and the auxiliary winch suspending the crown 52 are simultaneously lowered, and the excavating bucket 50 is guided directly above the shear box. When the excavating bucket 50 is placed at this point, the main winding winch is stopped, and the crown 5 suspended by the auxiliary winding winch is stopped.
When the shell 51 is opened while supporting the excavation bucket 50 in step 2, the earth and sand is discharged from the inside of the excavation bucket 50 to the shear box.

After the earth removal, the winding and turning are performed again, and the excavating bucket 50 is placed above the casing tube 70.
, The digging bucket 50 is lowered to perform digging.

During this excavation operation, the casing tube 70 is connected to the swing motor 64 of the full swing boring machine 60.
And the pulling cylinder 6
Since the indentation force is given at 5, it is pushed into the ground as the excavation proceeds.

At this time, the all-turn boring machine 60
The casing tube 70 is rotated by the reaction force that rotates the casing tube 70, but does not rotate because the reaction force is received by the heavy crawler crane 10 via the reaction force taking frame 66.

When the entire casing tube 70 is pushed into the soil, the next casing tube 70 is refilled with a lock pin (not shown) and excavation is performed until the casing tube 70 reaches a predetermined depth.

When the excavation is performed to the planned depth, that is, when the casing tube 70 is lowered, the excavating bucket 50 is removed from the crawler crane 10, for example. Hole).

Next, a tremy pipe (not shown) for setting the ready-mixed concrete is set, and the full-turn boring machine 60 is set while setting the ready-mixed concrete with the tremy pipe.
When the casing tube 70 is pulled out, the pile is completed in the soil as the ready-mixed concrete hardens. The work at the excavation position ends when the placing of the ready-mixed concrete and the pulling out of the casing tube 70 are completed.

[0029]

When the work at the excavation position is completed, the operation proceeds to the excavation work for the next pile. For this purpose, the entire turning boring machine 60 is moved to the next excavation position.

However, when the work is completed, the crawler crane 10 (base machine) and the full-slewing boring machine 60 (slewing boring machine) mutually stop to receive the torque reaction force of the full-slewing boring machine 60 generated during excavation. Are connected by a reaction force taking frame 66.

Therefore, when transferring the full turning boring machine 60, the reaction force taking frame 66 is removed from the full turning boring machine 60, the full turning boring machine 60 is suspended and moved by a crane, and the movement is completed. Therefore, the reaction force taking frame 66 is attached.

In other words, when moving the all-spinning boring machine 60, operations of separating the revolving boring machine 60 from the base machine and re-attaching the same are required. However, such a removing operation and an attaching operation are quite complicated since the heavy reaction force removing frame 66 is operated. In addition, since complicated work is required when moving and after the completion of the transfer, the transfer of the entire turning boring machine 60 takes a considerable amount of time, and the efficiency of the transfer operation is not good.

In addition, since the all-spinning boring machine 60 is heavy, use a crane corresponding to the relocation, ie, use a large crane as shown in FIG. 8 when hoisting with a normal crane lifting device. Is uneconomical.

Therefore, it is conceivable that the entire swiveling boring machine is moved by a large crane and excavation is performed by a medium-sized crane. However, in this case, since the line pull of the winch and the speed are low, the excavation efficiency is poor, which is not preferable.

When moving from one construction site to another, it is required to transport the crane by a trailer or the like. In particular, if the crane is large, the crane for disassembling and assembling the crane and the crane for mounting the disassembled crane on the trailer also need to be large, so that the transportation cost is high (especially, the weight and the cost are high). Was uneconomical.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lifting and lowering device for an excavator capable of lifting and lowering a rotary boring machine while a base machine is connected. It is in.

[0037]

According to a first aspect of the present invention, there is provided an excavator elevating apparatus, comprising: a rod rotatably mounted on a base machine and a revolving boring machine; An elevating drive means for raising and lowering the revolving boring machine via the rod is provided, and the revolving boring machine is raised and lowered by a dedicated elevating structure that does not use a boom.

That is, according to the excavator elevating device of the first aspect, when the revolving boring machine is moved up and down to move to another excavation position or to another construction site, the elevating drive means is used. The swivel boring machine placed on the ground is raised via the rod connecting the base machine and the swivel boring machine. Thereafter, the swiveling boring machine may be moved to another excavation position together with the base machine, or may be moved to a bed such as a trailer, and then lowered at the same location.

That is, the revolving boring machine can be lifted and lowered while being connected to the base machine without requiring a crane. This eliminates the need for complicated work such as removing and attaching the swivel boring machine from the base machine every time it moves.

Therefore, the transfer time required for transferring the excavator can be reduced. In addition, there is no need for a crane for lifting the revolving boring machine, so that transportation costs are reduced.

In addition, the structure for raising and lowering the swiveling boring machine with a rod connected to the swiveling boring machine does not cause any swing of the suspended load, unlike hanging a crane boom and a wire. In addition, by the same structure,
Since the revolving boring machine is suspended at a position closer to the center of rotation than when using a crane, the burden on the base machine can be reduced accordingly, and as a result, the weight of the base machine can be reduced and the base The cost of disassembling, transporting, and reassembling the machine when transporting the machine is reduced.

Moreover, the rod connecting the base machine and the revolving boring machine also has a function of receiving the torque reaction force that the revolving boring machine tends to rotate during excavation.

According to a second aspect of the present invention, there is provided an excavator lifting device
In addition to the above objects, in order to raise and lower the turning type boring machine while maintaining a predetermined posture, the turning type boring machine is rotatably connected to each of the base machine and the turning type boring machine, and is synchronized with the rod during the elevating operation. The lifting and lowering link is operated so that the rotating boring machine moves up and down without rotating by the joint of the rod and the lifting and lowering link at the time of lifting and lowering.

According to a third aspect of the present invention, there is provided an excavator lifting apparatus
In addition to the above objects, in order to be able to carry only the turning type boring machine, there is provided a lifting link rotatably provided for each of the base machine and the turning type boring machine, and the lifting link and the rod are provided. Is detachably mounted on one or each of the base machine and the turning boring machine so that the turning boring machine can be separated from the base machine.

[0045]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on one embodiment shown in FIGS. Here, FIGS. 1 to 3 show the entire excavator to which the present invention is applied, together with the excavation process, and FIG. 6 shows the operation process of putting the rebar cage 103 into the excavated hole after excavation. FIG. 7 shows an operation process for moving to the next excavation point.

In these drawings, the above-mentioned “prior art”
The same parts (e.g., devices and parts having the same functions) as those of the excavator described in the above section are denoted by the same reference numerals, and description thereof will be omitted. In this section, different sections will be described.

That is, in this embodiment, the crawler crane 10 serving as a base machine pushes the excavation bucket 50 forward and guides the excavation bucket 50 to a clogging position, and the full-turn boring machine 60 remains connected to the crawler crane 10. The difference is that an elevating device 101 capable of elevating is provided.

As for the former discharging apparatus 100, a leader supporting frame 120 protrudes upward from the front of the crawler crane 10. The lower end of the leader support frame 120 is rotatably supported in the front-rear direction, for example, with respect to the swing frame 31. The leader support frame 120 is also supported by a leader up / down jack 121 provided between the intermediate portion thereof and, for example, a front portion of the swing frame 31. The extension / retraction drive (operation) of the leader up / down jack 121 causes the leader support frame 120 to move. Can be raised and lowered with the lower end as a fulcrum.

The leader 113 is provided at the upper end of the leader support frame 120. Leader 113
As shown in detail in FIG. 4, it is composed of a member extending linearly, and an intermediate portion is supported on the upper end portion of the leader support frame 120 so as to be rotatable in the front-rear direction.

On the front side of the leader 113, a pair of guide pipes 118 is provided over substantially the entire length of the leader 113 as shown in FIGS. The guide pipe 118 is provided with a slide frame 111 that is guided by the guide pipe 118 and is slidable (slidable) in the vertical direction. Reference numeral 119 denotes a guide pipe 1 provided at the upper and lower ends of the slide frame 111.
18 shows a guide gib slidably fitted to the guide gib. Then, through the slide frame 111, the reader 1
On the front side of 13, an earth discharging plate 110 is installed.

More specifically, the earth discharging plate 110 is, for example, as shown in FIG.
As shown in FIG. 5, the belt-like member extends in a substantially J-shape, and has a cross-section in the shape of an arc following the bucket side surface. The upper end of the same member is rotatably supported by the slide frame 111, and the
Are mounted on the reader 113 so as to be rotatable, that is, openable and closable.

As shown in FIG. 4, an intermediate portion of the earth discharging plate 110 is supported by a earth discharging plate pushing jack 112 mounted between the sliding frame 111 and the expansion / contraction of the earth discharging plate pushing jack 112. In drive (operation),
The excavating plate 110 can be moved between a retracted position following the leader 113 and an extruding position where the excavating bucket 59 shown in FIG.

That is, by driving the earth discharging plate pushing jack 112 to open the earth discharging plate 110, the excavating bucket 50 located above the excavating hole is pushed forward, and the earth excavating is performed at a position avoiding the excavating hole. I can do it.

Then, the leader undulating jack 121
The distance between the excavating bucket 50 and the earth discharging plate 110 can be adjusted. The lower end of the leader 113 is rotatably pin-connected to, for example, the front of the swing frame 31 via a leader adjustment jack 122. The verticality of the leader 133 can be adjusted by the expansion / contraction drive (operation) of the leader adjustment jack 122. By adjusting the leader 113, the posture of the earth discharging plate 110 can be adjusted, and the posture of the earth discharging plate 113 suitable for the earth discharging operation can be obtained.

The slide frame 111 is used for the lifting drive 1
15 are built in. The lifting drive device 115 uses a slide frame lifting cylinder (jack) 114 provided along the leader 113 inside the leader 113 as shown in FIGS. By pushing and pulling the wire rope 115 a fixed to the lower end of the slide frame 111, the slide frame 111 is slid along the leader 113.

More specifically, as shown in FIGS. 4 and 5, two (only one is shown) sheaves 116 are provided on the rod side of the cylinder which is the upper end of the slide frame lifting / lowering cylinder 114.

An equalizer sheave 117 is provided at a lower portion in the reader 113. Then, a wire rope 115 fixed to the lower end of the slide frame 111
a is a sheave 116 at the rod end, an equalizer sheave 1
17, again passes through the sheave 116 at the end of the rod, is fixed at the lower end of the slide frame 111, and is driven up and down by the slide frame lifting cylinder 114 to raise and lower the intermediate portion of the wire rope 115a. The vertical position of the slide frame 111, that is, the vertical position of the earth discharging plate 110 as shown in FIG. 3, can be changed by a displacement amount twice as large as the cylinder stroke. With this elevating structure, the earth discharging height can be quickly adjusted (changed).

On the other hand, to explain the latter elevating device 101, the reference numeral 123 indicates that the ends of the track frame 23 of the crawler crane 10 and the full-spinning boring machine 60, which are base machines, are each turned vertically by pins. It is a reaction force taking rod (rod) movably connected. Of the reaction force taking rod 123, for example, the pin on the front side of the full turning boring machine 60 is
0 is detachably connected so as to enable disconnection.

Then, for example, a driving device 121a using the above-mentioned leader undulating jack 121 as a driving source as it is.
By using (elevation driving means), the entire swiveling boring machine 60 can be raised and lowered through the reaction force taking rod 123.

As to the driving device 121a, an elevating link 124 that is substantially parallel to the reaction force rod 123 protrudes from the front side of the swing frame 31. The rear end of the lifting link 124 is connected to the swing frame 31 by a pin so as to be rotatable in the vertical direction.
The front end of the elevating link 124 is connected to the all-spinning boring machine 60 by a pin so as to be rotatable in the vertical direction. Of these connecting portions, the pin on the front side of the lifting link 124 is detachable, and together with the attachment / detachment structure (attachment / removal with the pin) of the reaction force take-off rod 123, the all-turn boring machine 60 is moved from the base machine side. It can be separated.

One end of a lifting rod 125 is rotatably connected to a pin position of the lifting link 124 on the boring machine side by a pin. The other end of the elevating link 124 is pin-connected at the same position where the leader up / down cylinder 121 is connected.
The elevating link 124 can be moved up and down by the expansion / contraction drive (operation).

Thus, if the elevating link 124 and the elevating rod 125 are pin-connected to the full turning boring machine 60 and the leader up-and-down cylinder 121 is extended,
A substantially parallel link mechanism formed between the crawler crane 10 serving as a base machine and the full-slewing boring machine 60 allows the full-slewing boring machine 6 to be placed on the ground.
The 0 is raised while maintaining the posture on the ground, and can be lowered to the ground with the same posture by contracting.

That is, during the elevating operation, the elevating link 124 operates in synchronization with the reaction force taking rod 123, so that the entire turning boring machine 60 is raised and lowered while maintaining a predetermined posture without causing rotation. is there.

By utilizing this elevation, the entire turning boring machine 60 can be moved to another excavation position or mounted on a bed such as a trailer. Also, by releasing the pin connection of the reaction force taking rod 123, the lifting link 124, and the lifting rod 125 on the boring machine side, the all-turn boring machine 60 is separated from the base machine,
Only the entire turning boring machine 60 can be transported by a trailer or the like.

Incidentally, as shown in FIG. 1, the reaction force taking rod 123 is connected to the crawler crane 10 serving as a base machine.
The lifting link 124 and the lifting rod 125 constituting the lifting device 101 are unnecessarily connected to the full rotation boring machine 6 while the pin is always connected to the rotary boring machine 60.
In order to prevent the 0 from moving up and down, it is used separately from the entire turning boring machine 60 during the cutting operation.

Here, reference numeral 101a denotes a cylinder for raising and lowering the boom 32. However, when excavation is performed using the excavator configured as described above, the excavator 110
Is positioned at a position corresponding to the unloading position.

As shown in FIG. 1, the distance between the excavating bucket 50 and the discharge plate 110 and the discharge plate 11
Adjust the posture of 0 properly. Specifically, the leader raising / lowering cylinder 121 is operated to change the inclination angle of the leader support frame 120, and the front and rear positions of the leader 113 (including the slide frame 111) are adjusted to a point at an appropriate distance from the excavation bucket 50. After that, the leader adjustment jack 122 is operated to adjust the posture so that the leader 13 is perpendicular to the excavating bucket 50 suspended from the crawler crane 10.

The slide frame lifting cylinder 114
With the operation described above, the earth discharging plate 110 is positioned at a height corresponding to the earth discharging height determined by the current casing tube height. During excavation, the lifting link 124 and the lifting rod 125 are detached from the full swing boring machine 60 so that the driving force of the leader up / down cylinder 121 is not transmitted to the full swing boring machine 60.

Thereafter, the power unit 80 is driven to
The pressure oil is sent to the all-slewing boring machine 60, and the clamping device, the slewing motor 64, and the drawing cylinder 65 are operated. Then, the casing tube 70 is clamped by the clamp device and pushed into the soil by the pull-out cylinder 65 while being rotated by the turning motor 64.

During this time, the operation of the crawler crane 10
Using a digging bucket 50 suspended from the crane 10,
The work of excavating the inside of the casing tube 70 and discharging the soil in the excavated bucket 50 after the excavation to a position avoiding the casing tube 70 serving as the excavation hole is performed.

More specifically, as the excavating work, first, the excavating bucket 50 suspended by the crawler crane 10 is lowered into the casing tube 70, and then the winch is released from a certain height and dropped.

Then, the shell 51 opened at the tip of the excavation bucket 50 is pushed into the soil. When the winch is wound up from this state, the excavation bucket 50
1 is closed and rolled up with earth and sand inside.

When the head 53 attached to the upper part of the excavation bucket 50 is fitted into the crown 52, the winding of the winch is stopped. As a result, the excavating bucket 50 holding the earth and sand (soil) is arranged on the side of the earth discharging plate 110.

Subsequently, the discharging plate pushing jack 112 is operated to open the discharging plate 110. Then, as shown in FIG. 2, the excavation bucket 50 holding the soil inside the excavation hole is pushed forward, and the bucket 50 directly avoids the excavation hole, for example, there is a shear box (not shown). Guided to a point.

Then, at the extruded point, the shell 51 is opened by operating the excavating bucket 50, and earth and sand (soil) is discharged from the inside of the excavating bucket 50 to the shear box. When the earth removal is completed, the earth removal plate 110 is closed, the excavation bucket 50 is returned above the excavation hole, and the excavation bucket 50 is lowered again to perform excavation.

Here, the casing tube 70 is given a rotating force by the swing motor 64 of the full swing boring machine 60 and a pushing force by the drawing cylinder 65, so that the ground is excavated as the excavation proceeds. It is pushed inside.

At this time, the all-turn boring machine 60
Does not rotate due to the reaction force that rotates the casing tube 70, but the reaction force is received by the heavy crawler crane 10 via the reaction force removing rod 123. Of course, the reaction force taking rod 123 has sufficient rigidity to transmit this reaction force to the crawler crane 10.

When the entire casing tube 70 is pushed into the soil, the next casing tube 70 is refilled with a lock pin (not shown) and excavation is performed until the casing tube 70 reaches a predetermined depth. At 6m, the casing tube 70 is usually refilled by lock pins every 6m).

At this point, when the new casing tube 70 is added, the upper end of the casing tube 70 is moved to the full-turn boring machine 60 as shown in FIG.
And lowers as the casing tube 70 is pushed into the soil as shown in FIG.

That is, the discharging position changes according to the excavation work. Therefore, during excavation, the slide frame lifting / lowering cylinder 114 is operated, and as shown in FIG.
The height position of 0 is made to follow the change in height of the casing tube 70.

When excavating to the planned depth, that is, when the casing tube 70 is lowered, for example, the excavating bucket 50 is removed from the crawler crane 10, and as shown in FIG. Into the drilled hole (drilled hole).

Next, a tremy tube (not shown) for setting the ready-mixed concrete is set, and the full-turn boring machine 60 is set while setting the ready-mixed concrete with the tremy tube.
When the casing tube 70 is pulled out, the pile is completed in the soil as the ready-mixed concrete hardens.

When the placing of the ready-mixed concrete and the withdrawal of the casing tube 70 are completed, the work at the same excavation position is completed, and the full-turn boring machine 60 is moved to the next excavation position.

At this time, the end of the lifting link 124 and the lifting rod 125 removed during the excavation on the side of the full turning boring machine 60 is pinned to the full turning boring machine 60 by operating the leader support frame up / down jack 121. Align and connect with pins.

Next, as shown in FIG. 7, when the jack 121 for raising and lowering the leader support frame is extended, the all-spinning boring machine 60 can cooperate with the reaction force removing rod 123 and the elevating link 124 forming a substantially parallel link mechanism. The rotation is suppressed by, and ascends while keeping the posture on the ground.

[0086] All-turn boring machine 6 up to predetermined position
When 0 is lifted, the crawler crane 10 is run while maintaining the state, and the all-turn boring machine 60 is moved to the next excavation point.

Next, the all-turn boring machine 60 is lowered at the excavation point of the moving destination and installed at the same point. Then, at this excavation point, if excavation work is performed in the same manner as described above, the pile at this point is completed.

If the movement of the full-turn boring machine 60 is repeated for each excavation point, piles are completed one after another. During this movement, the crawler crane 10 serving as the base machine lowers the height of the center of gravity of the machine and lowers the center of gravity as shown in FIG. 7 so that the full turning boring machine 60 can be moved in a stable state. In order to move the boom 32 rearward, it is desirable to perform the boom 32 with the boom 32 in the most contracted state and with the boom 32 almost upright.

When the full turning boring machine 60 is raised and lowered via the reaction force taking rod 123 in this manner, the full turning boring machine 60 is moved to the crawler crane 1.
You can move up and down while connected to 0 (base machine).

This eliminates the need for complicated work such as removing and attaching the full-slewing boring machine 60 from the crawler crane 10 (base machine), which is required for each movement (relocation) to the excavation point.

Therefore, the transfer time required for transferring the excavator can be reduced, and the excavation efficiency can be improved. In addition, there is no need for a dedicated crane for lifting the all-turn boring machine 60, so that transportation costs are reduced.

In addition, the lifting / lowering device 101 which raises / lowers the all-turn boring machine 60 with the reaction force taking rod 123 includes:
Unlike a crane suspended by a crane boom and wires,
No swing of the suspended load occurs. Further, in the case of the same apparatus 101, since the all-turn boring machine 60 is hung at a position closer to the turning center side than in the case of a crane, the load on the base machine can be reduced accordingly, and as a result, the base machine, that is, The weight of the crawler crane 10 can be reduced, and the cost of disassembling, transporting, and reassembling the machine when transporting the base machine to the construction site can be reduced.

Further, the rod 123 connecting the crawler crane 10 serving as the base machine and the full turning boring machine 60 also has a function of receiving the torque reaction force that the full turning boring machine 60 is going to rotate during excavation. Excellent in terms of applicability.

Further, during the elevating operation, the all-turn boring machine 60 is moved up and down by using the elevating link 124 operating in synchronization with the reaction force taking rod 123, so that the all-turn boring machine 60 is placed on the ground without rotating. Can be moved up and down while maintaining the posture at the time of the movement, that is, the predetermined posture, and it is easy to move the all-spinning boring machine 60 to the excavation point and transport it to another construction site.

Further, since the ends of the reaction force removing rod 123 and the lifting link 124 on the boring machine side are detachably connected to the all-turn boring machine 60 by pins,
After mounting the all-turn boring machine 60 on a loading platform such as a trailer by the lifting device 101, the pin connection is released,
By separating the all-spinning boring machine 60 from the base machine, the full-spinning boring machine 60 can be easily transported.

The lifting device 1 having such an effect is also provided.
In addition, when the discharging apparatus 100 is attached to a crane serving as a base machine in addition to 01, the discharging of the digging bucket 50 can be performed without performing a turning operation, so that the digging time is greatly reduced. In addition, the lifting device 101 is used as a driving source of the earth discharging device 100, that is, the leader raising / lowering jack 1
Since the drive unit 21 is used, the drive unit 121a also has a simple structure.

Moreover, since such a crane has the function of a normal crane as it is, there is no need for a companion crane, and the crane alone can be used for the casing tube 70, the reinforced cage 103, the tremy tube ( (Not shown). Moreover, since the crane can be used as a normal crane in a state where the earth discharging device 100 and the elevating device 101 are removed, the operation rate of the machine is excellent.

In one embodiment, the reaction force taking rod 1
23, the end of the lifting link 124 on the boring machine side is made detachable, but is not limited thereto.
3. The end of the lifting link 124 on the base machine side may be made detachable, or both may be made detachable, so that the all-turn boring machine 60 can be separated from the base machine.

[0099]

As described above, according to the first aspect of the present invention, the turning type boring machine can be moved up and down while being connected to the base machine, and it is necessary to move to the excavation point every time it is moved and relocated. This eliminates the need for complicated work such as removing and attaching the turning type boring machine from the base machine.

Therefore, the transfer time required for transferring the excavator can be shortened, and the excavation efficiency can be improved. Moreover, there is no need for a crane for lifting the revolving boring machine, so that transportation costs are low.

In addition, since the swiveling boring machine is moved up and down by the rod, the swing of the suspended load does not occur at all unlike the case of hanging by the crane boom and the wire. Moreover, since the swiveling boring machine is hung closer to the center of swiveling than a crane, the burden on the base machine can be reduced accordingly, reducing the weight of the base machine, and moving to the construction site. The cost of disassembling, transporting, and reassembling the machine when transporting the product can be reduced.

Further, the rod connecting the base machine and the revolving boring machine also has a function of receiving the torque reaction force that the revolving boring machine tends to rotate during excavation, so that the parts can be effectively used.

According to the invention described in claim 2, according to claim 1
In addition to the effects described above, the turning boring machine can be moved up and down while maintaining a predetermined posture, so that the turning boring machine can be easily moved to an excavation point, transported to another construction site, and the like.

According to the invention described in claim 3, according to claim 1
In addition to the above effects, the turning boring machine can be easily transported by separating the turning boring machine from the base machine.

[Brief description of the drawings]

FIG. 1 is a diagram showing an elevating device according to an embodiment of the present invention, together with a base machine and an all-turn boring machine that constitute an excavator.

FIG. 2 is a view for explaining the discharging of an excavating bucket by a discharging plate of a discharging device.

FIG. 3 is a diagram showing a state in which the height of the earth discharging plate is changed following a change in the earth discharging height.

FIG. 4 is a view for explaining a structure for raising and lowering the earth discharging plate.

FIG. 5 is a sectional view taken along the line AA in FIG. 4;

FIG. 6 is a diagram for explaining an operation of performing an incidental work of inserting a reinforcing bar cage into an excavated hole after excavation using only the same crane.

FIG. 7 is a view for explaining an operation of moving the all-turn boring machine to the next excavation point.

FIG. 8 is a diagram for explaining an excavation operation using a bucket suspended from a conventional crane.

[Explanation of symbols]

Reference Signs List 10: crawler crane (base machine) 60: full-turn boring machine (turn-type boring machine) 101: elevating device 121a: driving device (elevating drive means) 123: reaction force taking rod (rod) 124: elevating link.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshihiro Kuge 7--14-14 Wadamiya-dori, Hyogo-ku, Kobe-shi, Hyogo

Claims (3)

[Claims] 1. An excavator having a swiveling boring machine and a base machine, comprising: a rod rotatably attached to each of the base machine and the swiveling boring machine; An elevating device for an excavator, comprising: an elevating drive means for elevating the boring machine. 2. The lift machine according to claim 1, further comprising a lifting link rotatably provided for each of the base machine and the revolving boring machine, and operating in synchronization with the rod during a lifting operation. Excavator lifting equipment. 3. An elevating link rotatably provided for each of the base machine and the revolving boring machine, wherein the elevating link and a rod are connected to the base machine,
2. The excavator lifting apparatus according to claim 1, wherein the excavator is detachably mounted on one or each of the revolving boring machines.