JPH10205263A - Earth-removing device for excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of earth removal by arranging a bucket, in which soil and sand are held, at the place of a blade and introducing the bucket to a spot, where an excavated pit is avoided, by driving the blade. SOLUTION: The earth removing device 100 is composed of a leader support frame 120 rotatably installed on a crane, a leader derricking jack 121 derricking the frame 120, a leader 113, a sliding frame 111 and a rotatable blade 110. When excavated materials in a casing tube 70 are removed, an excavating bucket 50, in which soil and sand are held, is wound up, and stopped on the side of the blade 110. The blade 110 is opened by a blade extruding jack 112, the bucket 50 placed at the upper section of an excavated pit is pushed out forward, and a shell 51 is opened at the spot of installation of a muck box, etc., avoiding the excavated pit and soil and sand are removed. The blade 110 is closed, the bucket 50 is returned to the upper section of the excavated pit, and excavation works are reopened. Accordingly, since the slewing operation of the crane is unnecessitated, an earth removing time can be shortened largely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth removal 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 An excavator that excavates with a crane serving as a base machine, for example, a crawler crane, and a bucket suspended from the crane, is used for the construction of a base pile for cast-in-place.

[0003] Typically, a casing tube 70 is pushed into the soil while rotating, using, for example, a full-turn boring machine 60 as shown in FIG. 8, and the soil in the casing 70 is suspended by a crawler crane 10. There is an excavator that employs an all-casing method in which excavation is performed using a drilling bucket 50 (bucket).

The crawler crane 10 used in this excavator employs the following structure. 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.

[0005] 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.

[0007] 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 counterweight 35, a main winch, an auxiliary wint, and a boom hoisting winch (not shown) on a swing arm 31 serving as a chassis. Is configured.

Here, the main winding winch is connected 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, the all-slewing boring machine 60 is configured by combining a base frame 61, an outrigger 62, a bearing case 63, a slewing motor 64, 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 via a reaction force taking frame 66, and generate a reaction force generated by the full swing boring machine 60 to rotate the full swing boring machine 60. The crawler crane 10 receives it.

The reference numeral 80 designates 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.

In the excavating operation using such a machine, 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 6
4. Activate the drawing cylinder 65. Then, the casing tube 70 is clamped by the clamp device, and is pushed into the soil by the pull-out cylinder 65 while being rotated by the swing motor 64.

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 operation, 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 a reaction force that rotates the casing tube 70. However, since the reaction force is received by the heavy crawler crane 10 via the reaction force taking frame 66, the casing tube 70 does not rotate.

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 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 a reinforced cage (not shown) is suspended by the crawler crane 10 to excavate the excavated hole (excavation). 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.

Then, the work at the same excavation position is completed by the completion of the placing of the ready-mixed concrete and the completion of the withdrawal of the casing tube 70, and the entire turning boring machine 60 and the power unit 80 are moved to the next excavation position. If excavation work is carried out, piles will be completed one after another. The pulled-out casing tube 70 is reused at the next place.

[0031]

By the way, when the earth and sand (soil) in the excavation bucket 50 is discharged, the excavation hole is efficiently located at a position avoiding the excavation hole, that is, a point where the all-turn boring machine 60 does not interfere. It is required to discharge earth and sand (soil) in the excavation bucket 50.

Here, when excavating with the excavating bucket 50 suspended from a crane, the excavating bucket 50 holding earth and sand is used.
Is disposed above the excavation hole, so that the earth removal operation is performed by the swiveling operation of the crane, that is,
0 turning operation, the drilling hole (full turning boring machine 60
It is necessary to move the excavation bucket 50 from the position of the part where the crater is located) to the discharge point on the same side (the point where the shear box is located).

However, the turning operation of the crane at the time of earth discharging is performed by the upper revolving unit 30 (excavation bucket 5
However, it takes a long time to turn the suspended load while preventing the swing of the suspended load (because various devices are mounted together with the load 0). In particular, a large crane that needs to lift the full-turn boring machine 60 consumes considerable time.

For this reason, the excavating operation requires a lot of time for discharging the soil, and there is a problem that the excavating efficiency of the excavator is poor. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an unloading device of an excavator capable of performing an unloading operation with a bucket with good performance.

[0035]

According to a first aspect of the present invention, there is provided an earth removal apparatus for an excavator, wherein a supporting frame is rotatably mounted on a crane and the supporting frame is raised and lowered. By providing a driving means, installing a leader on the support frame, installing a discharge plate rotatably on this leader, and providing a discharge plate driving means for opening and closing the discharge plate, and opening the discharge plate by opening the discharge plate Another object of the present invention is to push a bucket suspended from a crane forward so as to discharge soil in the bucket while avoiding an excavation hole formed by the bucket.

That is, according to the first aspect of the present invention, the interval between the bucket and the earth discharging plate is adjusted by the undulation of the support frame by the support frame driving means. Then, when the bucket holding the earth and sand (soil) is placed on the earth removal plate, open the earth removal plate and push the bucket holding the soil inside forward, and the bucket avoids the excavation hole as it is I was led to the point.

Therefore, the turning operation of the crane, which has been a factor of spending time in excavation work, is no longer necessary.
The efficiency of earth removal work is improved. In addition to the above object, the earth removal device for an excavator according to claim 2 is provided with a leader rotatably mounted on a support frame so that the bucket can be always pushed out with the earth removal plate. Adjustment means for adjusting the posture is provided so that the posture of the earth removal plate can be adjusted.

An excavator discharging device according to claim 3 is
In addition to the above objects, in order to be able to change the earth discharging height, a slide frame slidably installed on the leader, and a sliding means for sliding this slide frame along the leader, An earth removal plate is attached to the slide frame to adjust the earth removal height.

[0039]

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 "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 the present embodiment, the excavating device 100 that pushes the excavating bucket 50 forward to the crawler crane 10 constituting the base machine and guides the excavating bucket 50 to the unloading position, and the full-turn boring machine 60 are connected to the crawler crane 10. The difference is that an elevating device 101 that can be raised and lowered as is is provided.

To explain the former discharging apparatus 100, a leader support frame 120 (support frame) 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. Also, the leader support frame 120
Is also supported by a leader up / down jack 121 (corresponding to a support frame driving means) provided between the intermediate portion thereof and, for example, the front portion of the swing frame 31. The support frame 120 can be raised and lowered about the lower end portion as a fulcrum.

A 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.

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.

The intermediate portion of the earth discharging plate 110 is supported by an earth discharging plate pushing-out jack 112 (corresponding to earth discharging plate driving means) attached to the slide frame 111 as shown in FIG. Extruded jack 11
2 by the telescopic drive (operation)
13 and a push-out position shown in FIG. 2, for example, which pushes out the excavating bucket 50 greatly.

That is, by driving the earth discharging plate pushing jack 112 to open the earth discharging plate 110, the drilling bucket 50 located above the drilling hole is pushed forward, and the drilling bucket 50 is removed at a point avoiding the hole. The earth and sand (soil) in 50 can be discharged.

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, a front part of the swing frame 31 via a leader adjustment jack 122 (corresponding to an adjusting means). The expansion / contraction drive (operation) of the leader adjust jack 122 causes the leader 133 to move.
The vertical degree can be adjusted. This leader 1
By adjusting the position 13, 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 has a built-in lifting drive 115 as sliding means. As shown in FIGS. 4 and 5, the lifting drive device 115 uses a slide frame lifting cylinder (jack) 114 provided inside the leader 113 along the leader 113.
The wire rope 115a fixed to the lower end of the slide frame 111 is pushed and pulled by the expansion and contraction drive (operation) of the cylinder 14 to move the slide frame 111 to the leader 113.
Is used.

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, in the case of the latter lifting device 101, the reference numeral 123 indicates that the end of each of the lift frame 101 and the track frame 23 of the crawler crane 10 serving as the base machine and the full-spinning boring machine 60 are vertically rotated 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, by using the driving device 121a using the leader raising / lowering jack 121 as a driving source as it is, the entire turning boring machine 60 can be moved up and down via the reaction force rod 123.

To explain the drive device 121a, an elevating link 124 substantially parallel to the reaction force taking 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 can be attached to and detached from the all-slewing boring machine 60 with a pin.
0 to allow it to be separated).

One end of a lifting rod 125 is also 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, so that the elevating link 124 can be moved up and down by the expansion / contraction drive (operation) of the leader up / down cylinder 121. .

Accordingly, if the lifting link 124 and the lifting rod 125 are connected to the all-turn boring machine 60 by pins and the leader raising / lowering 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, the entire turning boring machine 60 can be moved to the next excavation point without removing it from the crawler crane 10 serving as the base machine.
Utilizing this elevation, it can be mounted on a bed such as a trailer of the all-spinning boring machine 60. Further, by releasing the pin connection of the lifting link 124 and the lifting rod 125 on the boring machine side, the entire turning boring machine 60 can be separated from the base machine and transported by a trailer.

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.

However, 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.

For this purpose, as shown in FIG. 1, the interval between the excavating bucket 50 and the earth removal plate 110 and the posture of the earth removal plate 110 are appropriately adjusted so that the earth removal is properly performed. Specifically, by operating the leader up / down cylinder 121, the inclination angle of the leader support frame 120 is changed,
After adjusting the front and rear positions of the leader 113 (including the slide frame 111) to a point at an appropriate distance from the excavation bucket 50, the reader adjust jack 122 is operated, and the excavator bucket 50 suspended from the crawler crane 10 by the leader 13 is operated. This is performed by adjusting the posture so as to be perpendicular to (the verticality is obtained).

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 operation, 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 mounted on the upper part of the excavating 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 ejection plate pushing jack 112 is operated to open the ejection plate 110. Then, as shown in FIG. 2, the excavation bucket 50 holding the soil inside the excavation hole is pushed forward by a quick operation, and the bucket 50 is directly avoided from the excavation hole, for example, a shear box (not shown). ) Where you are.

When the shell 51 is opened by operating the excavating bucket 50 at the extruded point, earth (sand) 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 and the excavation bucket 50 is closed.
Is returned to above the excavation hole, and then 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. 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.

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).

Here, at the time when a 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 earth 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 zero position is made to follow the change in the height of the casing tube 70 so that the efficiency is not reduced and the earth and sand are not scattered. At this time, when it is desired to adjust the interval between the excavation bucket 50 and the earth discharging plate 110 and the posture of the excavation bucket 50, the leader up / down cylinder 121 and the leader adjustment jack 122 may be operated.

Needless to say, when it is desired to carry out the turning and discharging with the crawler crane 10, the upper turning body 30 may be turned with respect to the lower traveling body 20 (similar to a normal crane).
Excavation to the planned depth, ie the casing tube 7
When 0 is lowered, for example, the excavating bucket 50 is removed from the crawler crane 10, and as shown in FIG. 6, the reinforced cage 103 is suspended by the crawler crane 10, and is put into the excavated hole (excavation hole).

Next, a tremee 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 is completed by the end of the placing of the ready-mixed concrete and the end of the removal of the casing tube 70, 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, which have been removed during excavation, on the full turning boring machine 60 side is pinned to the full turning boring machine 60 by operating the leader support frame up / down jack 121. Align and connect with pins.

Then, as shown in FIG. 7, if the jack 121 for raising and lowering the leader support frame is extended, the full-rotation boring machine 60 can move the reaction force removing rod 123 and the elevating link 124 forming a substantially parallel link mechanism. With this, the rotation is suppressed, and it keeps its posture on the ground and rises.

Then, the crawler crane 10 is run with the full turning boring machine 60 raised to a predetermined position, and the full turning boring machine 60 is moved to the next excavation point.
Is moved, the entire turning boring machine 60 is lowered and installed at the excavation point of the movement destination, and excavation work is performed in the same manner, whereby piles are completed one after another.

At this time, as shown in FIG. 7, in order to lower the height of the center of gravity of the machine and shift the center of gravity to the rear, the operation is performed with the boom 32 in the most contracted state and in the state of being raised most nearly vertically. Is desirable.

As described above, when the excavating bucket 50 hung from the crane is pushed forward by using the earth discharging plate 110 to excavate the earth, the crane of the crane, which is a factor of spending time in the excavation and earth discharging work, is used. No pivoting action is required.

As a result, the earth removal time is remarkably shortened as compared with the case where the earth is swung and earth is removed, the earth removal work is performed efficiently, and the excavation efficiency can be improved. In addition, since the earth discharging plate 50 is installed on the reader 113 whose posture can be adjusted, the distance between the earth discharging plate 50 and the excavating bucket 50 can be appropriately adjusted.
Can be extruded with the earth removal plate 50, and good earth removal work can be expected.

In addition, even if the excavation operation proceeds and the casing tube 70 is pushed into the soil and the height of the tube portion coming out of the ground changes, the discharge plate 50
If the height of the earth discharging plate 50 is displaced downward in accordance with the changing casing tube 70 by adopting the elevating device for raising and lowering, it is possible to prevent the efficiency from lowering and to prevent the earth and sand from being scattered, thereby achieving a good air discharging. Soil work can be performed.

Further, the earth discharging device 1 having such an effect is provided.
When the lifting device 101 is attached to the crane in addition to 00, the all-slewing boring machine 60 can be relocated while being connected with the reaction force rod 123 without performing disassembly work at the connection portion. In addition, the relocation time is greatly reduced. In addition, since the suspended load does not sway when relocating, and it is suspended closer to the center of rotation of the crane, the weight of the base machine crane can be light, and the machine used to transport the excavator to the factory site can be lightened. Disassembly, transportation and reassembly costs are reduced. In addition, when transporting the full-turn boring machine 60, the lifting device 1
01 can be used to lift the full swing boring machine 60 and place it on a carrier such as a trailer, so that a separate crane for lifting the full swing boring machine 60 is not required, and the transportation cost can be reduced. become.

In addition, since such a crane can maintain 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, There is also an advantage that lifting such as (not shown) can be performed. 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 lifting structure in which the slide frame 111 moves twice as much as the stroke of the slide frame lifting cylinder 114 is used. However, the present invention is not limited to this, and the slide frame 111 and the slide frame lifting cylinder are used. The slide frame 111 may be moved up and down by directly connecting the slide frame 111 to the slide frame 111. Further, a hydraulic jack or an electric screw jack may be used.

[0087]

As described above, according to the first aspect of the present invention, the excavating operation does not require the crane's turning operation, which is a factor of reducing the efficiency and spending the operation time. Can be discharged by pushing the bucket.

As a result, the earth removal time can be shortened, the earth removal work can be performed efficiently, and the excavation efficiency can be improved. According to the second aspect of the present invention, in addition to the effect of the first aspect, the distance between the bucket and the bucket can be appropriately adjusted. , Good earth removal work can be expected.

According to the invention described in claim 3, according to claim 1
In addition to the above-mentioned effects, even when the excavation work progresses and the earth removal height changes, the soil removal can be performed at a good position by displacing the height of the earth removal plate downward, which reduces the efficiency. It is possible to perform the earth removal work while preventing the scattering of the earth and sand, as well as the prevention of the dust.

[Brief description of the drawings]

FIG. 1 is a diagram showing an earth removal device according to an embodiment of the present invention, together with a crane equipped with the device.

FIG. 2 is a view for explaining a state in which the excavating bucket is pushed forward by the earth discharging plate of the earth discharging device.

FIG. 3 is a diagram for explaining a case where the height of the earth removal plate is changed following a change in the earth removal height.

FIG. 4 is a view for explaining a structure around a slide frame that lifts and lowers the earth discharging plate, and around 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]

DESCRIPTION OF SYMBOLS 10 ... Crawler crane (crane) 60 ... Full-rotation boring machine 110 ... Discharge plate 111 ... Slide frame 112 ... Discharge plate extrusion jack (discharge plate drive means) 113 ... Leader 115 ... Lifting drive device (slide means) 120 ... Leader support frame (support frame) 121. Leader up / down jack (support frame driving means) 122. Leader adjust jack (adjustment means).

 ────────────────────────────────────────────────── ─── 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 for digging with a crane and a bucket suspended by the crane, comprising: a support frame rotatably mounted on the crane;
Support frame driving means for raising and lowering the support frame, a leader installed on the support frame, a soil discharge plate rotatably installed on the leader, and a soil discharge plate driving means for opening and closing the soil discharge plate; An excavating device for an excavator, characterized in that the bucket is pushed forward by opening the earth discharging plate, and soil in the bucket is discharged while avoiding a drill hole formed by the bucket. 2. The excavator according to claim 1, wherein the leader is rotatably mounted on the support frame, and an adjusting means for adjusting a posture of the leader is provided. 3. A slide frame slidably mounted on the leader, and a slide means for sliding the slide frame along the leader, wherein the earth discharging plate is attached to the slide frame. The earth removal device for an excavator according to claim 1, wherein: