JPH089939B2 - Rotating bucket - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rotary bucket for excavating a vertical hole, which is swingably mounted on a tip end portion of a hydraulically driven working machine, and particularly relates to a narrow and deep bucket. The present invention relates to a rotary bucket suitable for forming a deep groove and discharging boulders, earth and sand and the like left at the bottom of the groove.

[Prior Art] In addition to vertical hole excavation, a rotary bucket for vertical hole excavation continuously digs the vertical holes at an appropriate pitch to bury pipes for accommodating electric wires and telephone lines, gas pipes, water and sewer pipes, etc. It is used for forming narrow and deep grooves for construction. FIG. 15 shows a conventional rotary bucket called an earth drill bucket, which has a bracket 8 attached to the tip of the arm of a hydraulically driven working machine, for example, a hydraulic excavator, at the upper part, and is integrated with the bracket 8. A rotary drive device 10 composed of a hydraulic motor for rotating the bucket 11 is attached, and a cylindrical rotary bucket 11 is rotatably attached to the lower part of the rotary drive device 10 via a bearing 9. In this case, the outer ring of the bearing 9 is normally fixed to the bracket 8 via the rotary drive device 10, while the bearing 9
The inner ring of is fixed to the upper end of the bucket 11, and by driving the rotary drive device 10, the internal content of the bearing 9 and the bucket 11 are rotatable with respect to the bracket 8. In addition, it is also possible to fix the inner ring of the bearing 9 to the bracket 8 via the rotary drive device 10 and fix the outer ring of the bearing 9 to the bucket 11. A bottom lid 12 is attached to an opening on the lower surface of the rotary bucket 11 so as to be openable and closable around a pin 13. The bucket 11 has a claw 61 that locks the bottom lid 12, and the claw 61 is rotated to allow the bottom lid 12 to rotate.
It has a manually operated trip lever 14 that opens 12 by its own weight.

In addition, as disclosed in Japanese Examined Patent Publication (Kokoku) No. 45-5231, the rotary bucket is vertically divided into halves, and the links provided on the upper portions of the respective half buckets are crossed in an X shape so that the intersections are axially divided. It is rotatably connected, a roller is attached to the upper end of each link, the lower end of the kerry bar is connected to the shaft, the kerry bar is pulled up, and the roller is pressed against the thrust plate provided on the lower surface of the kerry bar driving device. There is a configuration in which the split bucket opens. In addition, in the case of this split type bucket, it is also provided with a mechanism for holding the above-mentioned half-divided buckets in a closed state and a mechanism for locking and releasing this in conjunction with opening and closing of the bucket.

[Problems to be Solved by the Invention] Since the conventional rotating bucket shown in FIG. 15 has a structure in which the bottom lid 12 is opened to discharge the earth and sand taken into the bucket 11, as shown by a chain line in the figure. When the bottom cover 12 is opened, a space for discharging soil of at least the vertical dimension H from the bottom surface of the bucket 11 to the lower end of the bottom cover 12 is required. Therefore, it is necessary to operate the vertical stroke of the hydraulic working machine so as to secure the dimension H each time the earth and sand in the rotary bucket is discharged, and there is a problem that the height of the discharged earth is reduced accordingly. In addition, when the size of the bucket 11 is increased to increase the bucket capacity, although there is a difference depending on the soil quality, only the lengthened length makes it easier for soil to adhere to the inner circumference of the bucket 11.
Even if the bottom lid 12 is opened, the soil removal performance is poor and the work efficiency is reduced. Furthermore, when closing the bottom lid 12, the bucket 11
Must be pushed against the ground to lock the bottom lid 12, and this operation is performed by the manual operation of opening the bottom lid 12 and the bottom lid 12.
It was necessary to open and close 12 times each time, which had the problem of poor operability and poor efficiency.

On the other hand, in the case of the split bucket, since it is a dedicated machine that is attached to the kelly bar, it is impossible to use it by attaching it to the working machine without the kerry bar, and a bucket opening / closing mechanism with high rigidity is required. When the soil is discharged, the opening angle of the bucket is constant, so that there is a problem that the soil cannot be smoothly discharged in the case of clay-based soil.

Further, in any of the conventional buckets described above, it is possible to level the groove bottom, but it is almost impossible to grip the cobblestones and earth and sand remaining on the groove bottom and to scrub the bottom, and it is performed manually or by another attachment. Since it is unavoidable, there is a problem that the groove cannot be formed efficiently.

In view of the above-mentioned problems of the prior art, the present invention is capable of efficiently forming a groove having a narrow width and a deep depth with good excavability and operability, and further, a boulder left on the groove bottom or It is an object of the present invention to provide a rotating bucket capable of performing a bottoming work for a grasping work that can easily discharge earth and sand.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a bracket for mounting a bucket on a hydraulically driven working machine so that the bucket can swing, and a hydraulic pressure for rotating the bucket attached to the bracket. A cylindrical bucket having a motor and a bearing, and a plurality of cutters fixedly mounted on the bracket via the bearing and having a plurality of cutters fixedly mounted on the bottom surface to excavate the earth and sand when the bucket is rotated and to take the excavated earth and sand into the inside. In a rotary bucket for excavating a vertical hole, a fixed-side body in which a part of the side surface and the bottom surface of the bucket is notched, and a rotation fulcrum provided in the notched portion of the fixed-side body with the rotation fulcrum as a center. A movable body for opening and closing the notch, and a rotating means provided on the fixed body for rotating the movable body to open and close at an arbitrary angle. It was done.

Further, it is effective that the rotation fulcrum of the movable-side body is provided on the upper portion of the bucket and on the bottom surface of the bucket.

Further, in the structure in which the rotation fulcrum of the movable-side body is provided at the upper part of the bucket, plates are respectively provided on both sides of the inner surface of the fixed-side body, and the gap between the two plates is widened toward the cutout portion. A configuration with a slope, or a convex body on one of the joints of the fixed-side body and the movable-side body, and a concave body on the other side so that the convex body and the concave body mesh with each other during excavation. It is effective to

On the other hand, in the structure in which the rotation fulcrum of the movable side body is provided on the bottom surface of the bucket, the movable side body is maintained in the open state when the movable side body is in the open state, and the movable side body is closed. In the state, it is effective to open and close via a link mechanism that is folded into the fixed body, and the shape of the outer periphery of the movable body has a groove bottom surface when the movable body is in the open state. It is advisable to form a part of the area opposite to the flat bottom shape.

[Operation] With the above-described configuration, when excavating the vertical hole, the movable side body may be closed and the bucket may be rotated, and the earth and sand excavated by the cutter attached to the bottom surface by the rotation. Is taken into the bucket, and the taken-in earth and sand is discharged, for example, by moving the bucket to a predetermined dumping height of the dump truck, and at that position, the movable side body is diagonally below or directly below depending on the soil quality. This is done by swinging the bucket's neck and opening the movable side body at the same time.
In this case, the structure in which the side surface of the bucket is opened and closed and the bucket is swung diagonally or horizontally to discharge the soil reduces the vertical stroke of the hydraulic working machine at the time of soil removal.
It is effective to increase the height of soil removal.

Grooves are gradually formed when vertical hole excavation is continuously repeated in an appropriate pit.However, in the structure in which the pivot of the movable side body is provided above the bucket, the movable side body is opened and closed at the groove bottom. The scattered cobblestones are picked up, and the bucket is moved along the groove with the movable side body opened by the hydraulic working machine, thereby excavating the sediment accumulated in the groove and Allows the bottom of the groove to be exposed.
In addition, the plates with drafts attached on both sides of the inner surface of the fixed side body reduce the resistance of the earth and sand when excavating in the bucket to promote smooth outflow, and the joint between the fixed side body and the movable side body. The configuration in which the convex body and the concave body provided in the above are meshed with each other enables the fixed side body and the movable side body to integrally receive the torque during rotary excavation of the bucket.

Then, in the configuration in which the rotation fulcrum of the movable side body is provided on the bucket and the bottom surface portion, the rotation fulcrum of the movable side body is accumulated in the groove similarly to the configuration provided on the upper portion of the bucket. In addition to the function of excavating the existing sediment and the bottom of the groove, the function of scooping the sediment accumulated in the groove by moving the bucket along the groove while keeping the movable side body open It is possible to Further, by forming the outer peripheral shape of the movable-side body in a flat bottom shape in a part of the range facing the groove bottom when the movable-side body is in an open state, the scooping action of the earth and sand can be made more effective. .

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 14. Of these, FIGS. 1 to 9 are explanatory views of the first embodiment, FIG. 1 is a longitudinal sectional view showing the entire structure of the rotary bucket, FIG. 2 is a bottom view of FIG. 1, and FIG. Is II in Fig. 1
Fig. 4 is a sectional view taken along the line IV-IV in Fig. 3, Fig. 5 is a sectional view taken along the line V-V in Fig. 1, and Fig. 6 is an enlarged view taken along the line VI-VI in Fig. 5. 7, FIG. 8, FIG. 9 and FIG. 9 are explanatory views of working examples of the hydraulic excavator equipped with the rotating bucket shown in FIG.

In the figure, 15 is a bracket for mounting the bucket 6 on a hydraulically driven working machine so that the bucket 6 can be swung. The bracket 15 is provided with pin holes 16a, 16b, and the pin holes 16a, 16b are shown in FIG. The tip of the arm 4 of the hydraulic excavator shown in FIG.
Pins 39 and 40 are connected to a link 38 for increasing the rotation angle, which is pin-connected to the bucket cylinder 7, respectively. Further, a hydraulic motor 17 for rotating the bucket 6 is attached to the bracket 15, and an outer ring 41 of the bearing 19 is fixed to the lower surface of the bracket 15 by a bolt 20, and an inner ring 42 of the bearing 19 is provided. The tooth gear 43 and the pinion 18 fixed to the output shaft of the hydraulic motor 17 are meshed with each other.

A top plate portion 44 of the fixed-side body 21 is rotatably attached to the lower surface of the inner ring 42 with bolts 22. Fixed side body 21
Has a notched opening from the upper part of one side surface to the bottom surface, and the movable body 26 is attached so as to fit in the opening. Fixed side body 21 and movable side body 26
4, the cross-sectional shape is formed in an arc shape as shown in FIG. 4. In this embodiment, the fixed-side body 21 has a circumference slightly longer than the semicircle, and the movable-side body 26 is slightly longer than the semicircle. It has a short circumference.

The movable body 26 is attached to the opening by a hydraulic rotating means 29 attached to the upper portion of the fixed body 21 by bolts 30 so that the output shaft 45 can be rotatably supported. A boss 32 is fitted to the output shaft 45 via a rotation stop key 31, and the movable body 26 is attached to the boss 32.
Are attached by bolts 33. The rotating means 29 is
The output shaft 45 rotates in one direction when pressure oil is supplied from one of the hydraulic oil supply ports, and rotates in the opposite direction when pressure oil is supplied from the other. Rotating means 29
The hydraulic oil supply circuit for the fixed body is shown in FIG.
A rotary joint 35 attached to a boss 36 fixed to the center of rotation of the top plate portion 44 of 21 and a bracket for guiding the hydraulic oil from the hydraulic excavator body 1 shown in FIGS. 7 and 8 to the rotary joint 35. Hydraulic pipe connection port 34 provided on 15
And a pipe (not shown) connecting between the rotary joint 35 and the rotating means 29.

As shown in FIGS. 4 and 5, on both sides of the inner surface of the fixed-side body 21, there are provided plate members 37 for reducing the resistance of the sand in the bucket when the soil is discharged. body
(21 notches) with a draft that expands toward
The fixed-side body 21 is fixed and also serves as a reinforcement. 28 is a steel plate and a convex body fixed to one of the joints of the fixed-side body 21 and the movable-side body 26 (the movable-side body 26 in the present embodiment), and 27 is the other (fixed in the present embodiment A concave body made of a steel plate that fits with the convex body 28 fixed to the side body 21). The concave body 27 and the convex body 28 are fitted and meshed when the movable body 26 is closed. It becomes a state. Reference numeral 46 denotes a bottom plate of the fixed-side body 21 as shown in FIGS. 1 and 2, and a plurality of cutters 24 for excavating earth and sand on the bottom surface of the bottom plate 46 when the bucket 6 rotates and taking the excavated earth and sand into the bucket 6. Is fixed. twenty five
Is a side cutter attached to the lower side surface of the fixed-side body 21, 23 is an intake port for the earth and sand excavated by the cutter 24 and the side cutter 25, and the bottom plate 46 and the fixed-side body 21
Is provided on the lower side surface of. In some cases, a lid plate with a spring is attached to the intake port 23 for the earth and sand, and in addition, the intake port 23 for the side cutter 25 may be provided up to the upper part of the fixed-side body 21.

Vertical hole excavation is performed by moving the movable body 26 as shown by the solid line in FIG.
Is done with the closed. First, the positioning of the bucket 6 at the position to be excavated and the attitude control are performed by the hydraulic excavator body 1
Of the lower traveling body 1a, turning by the turning device 1b, raising and lowering of the boom 2 by the operation of the boom cylinder 3, raising and lowering of the arm 4 by the operation of the arm cylinder 5, and raising and lowering of the bucket 6 by the operation of the bucket cylinder 7. The combination of When the positioning and the posture control are completed, the bucket 6 is rotated and pushed down to start excavation. The bucket 6 is rotated by operating the hydraulic motor 17, rotating the pinion 18, and rotating the internal gear 43 of the inner ring 42 meshing with the pinion 18. When the bucket 6 rotates, the earth and sand excavated by the cutter 24 and the side cutter 25 are taken into the bucket 6 through the intake port 23. At this time, since the movable body 26 is closed by the rotating means 29, the earth and sand are removed. There are no spills. The torque due to the excavation resistance acting on the fixed-side body 21 and the movable-side body 26 during the rotary excavation is as if the two were integrated by the engagement of the convex body 28 and the concave body 27 provided at the joint between the two. Therefore, the torsional deformation of the bucket 6 during excavation is limited to a slight amount.

As shown in FIG. 7, the earth and sand discharged into the bucket 6 is operated by turning the swivel device 1b, the boom cylinder 3 and the arm cylinder 5, respectively.
For example, the bucket 6 is moved onto the dump truck 70 so as to have a predetermined discharge height h, and the bucket cylinder 7 is operated at that position so that the movable body 26 is obliquely below or below the bucket 6 depending on the soil quality. This is done by shaking the neck and simultaneously opening the movable body 26. The opening operation of the movable body 26 is
Pressure oil is sent from the hydraulic power source of the hydraulic excavator main body 1 to the rotating means 29 through the connecting port 34 of the hydraulic pipe shown in FIG. 1, the rotary joint 35, and the boss 36, and the output shaft 45 of the rotating means 29 is rotated. It can be performed at any angle up to the position shown by the chain line in FIG. This opening operation of the movable-side body 26 is possible regardless of whether the opening of the bucket 6 is obliquely downward or directly below, and therefore, in combination with the action of the plate material 37 having a draft, what kind of soil It can be discharged smoothly even with the earth and sand. Further, in this case, since the earth discharging height h can be made lower than that of the conventional configuration in which the bottom lid is opened, the vertical stroke of the hydraulic excavator at the time of earth discharging can be reduced to improve work efficiency. On the other hand, on the other hand, it becomes possible to make the soil discharge height h higher than before.

The closing operation of the movable-side body 26 after soil removal is performed by reversing the supply of the pressure oil to the rotating means 29 in the case of the opening operation.

When vertical hole excavation is repeated continuously at an appropriate pitch, narrow and deep grooves are gradually formed, but large and small boulders are usually scattered at the bottom of the groove, and destroyed earth and sand around the groove accumulates. To do. FIG. 8 is a diagram showing the work of picking up the cobblestone 47. In this case, the bucket 6 is hydraulically locked so that the bucket 6 cannot rotate, and only the movable body 26 is opened and closed to remove the cobblestone 47. Further, FIG. 9 is a diagram showing the excavation of earth and sand accumulated in the groove 48 and the bottom scooping operation of the groove. The bucket 6 is hydraulically locked so as not to be rotated by an external force, and the movable side body 26 is opened. Each of them is hydraulically locked, and by the combined operation of the turning operation of the hydraulic excavator main body 1 in the direction of the arrow a and the rotating operation of the arm 4 in the direction of the arrow b, the fixed-side body 21 is as if the original excavating bucket of the hydraulic excavator. As described above, it is moved in an arbitrary direction indicated by an arrow c to enable excavation of the sediment and sand scooping work. When the hydraulic excavator main body 1 turns, the orientation of the bucket 6 deviates from the orientation of the groove 48. This is corrected by rotating the bucket 6 little by little.

Next, a second embodiment will be described with reference to FIGS. FIG. 10 is a longitudinal sectional view showing the entire structure of the rotary bucket, FIG. 11 is a bottom view of FIG. 10, and FIG. 12 is XII-X of FIG.
II sectional view, FIG. 13 is a sectional view taken along the line XIII-XIII in FIG. 10, and FIG. 14 is an explanatory view showing an example of a working state of the wheel hydraulic excavator equipped with the rotating bucket shown in FIG. In the drawings, the same reference numerals as those in FIGS. 1 to 9 indicate the same or the same functions.

In the figure, 50 is a cylindrical bucket, and the fixed side body 51
And a movable side body 52, and the top plate portion 44 of the fixed side body 51 is attached to the lower surface of the inner ring 42 by bolts 22. The fixed-side body 51 is notched from the upper part of one side surface to the bottom surface and has an opening, and the movable-side body 52 is attached so as to fit in the opening. 53 is the fixed body
The bottom plate of 51 forms a hinge 54 with the bottom plate 52a of the movable body 52 and is connected to each other.
Is rotatably attached as a fulcrum. A plurality of cutters are provided on the bottom surface of the bottom plate 53 as in the case of the first embodiment.
24 are fixed.

The outer peripheral shape of the movable side body 52 is such that the portion close to the bottom plate 53 has a cross-sectional shape of the fixed side body 51, as shown in FIGS.
Together with the circular arc shape that forms a cylindrical shape, the shape changes from the circular arc shape to the flat bottom shape as shown in FIG. 13 as it goes away from the pin 55 of the rotation fulcrum toward the end side. The range of the flat-bottomed shape is the range of the outer peripheral surface of the movable-side body 52 on the side facing the groove bottom surface when the movable-side body 52 is in the open state.

Reference numeral 56 is a hydraulic cylinder for rotating and opening / closing the movable body 52, and is attached to the upper portion of the fixed body 51. Reference numeral 57 denotes a link whose upper ends, which are provided on the right and left sides in the fixed side body 51, are pin-connected to a rod 56a of a hydraulic cylinder 56, and an upper portion of the link 57 is a pin 58 which is locked to the fixed side body 51. It is rotatably supported by the fixed-side body 51 via. 59 is a link whose one end is pin-connected to the lower end of the link 57 and the other end is pin-connected to a position approximately in the middle of the length of the movable body 52, and 59a is a stopper fixed to the link 59, which is a hydraulic cylinder 56. When the movable body 52 is opened by the operation of (1) and the link 57 and the link 59 are in a serial state as shown by a chain line in the figure, the abutting portion 57a is abutted to hold the serial state. The hydraulic cylinder 56, the link 57, and the link 59 constitute a rotating means for rotating the movable body 52. Here, the hydraulic oil supply circuit for the hydraulic cylinder 56 is the same as in the first embodiment.

When drilling a vertical hole using the bucket 50, the hydraulic cylinder 56 is extended to link the link 57 and the link 59 to the fixed-side body 51.
Folded in, like the first embodiment, the first
This is performed with the movable body 52 shown by the solid line in FIG. 10 closed. Then, positioning of the bucket 50 to the excavation position and attitude control are performed by a combination of traveling of the hydraulic excavator, turning, boom undulation, arm undulation, and bucket 50 undulation, and when the positioning and attitude control are performed, the bucket 50 is moved. Excavation is started by pushing down while rotating. In this case the bucket
The turning of the hydraulic motor 50 by the hydraulic motor 17, the excavation of the earth and sand by the cutter 24 and the side cutter 25, the intake of the excavated earth and sand into the bucket 50, and the like are the same as those in the first embodiment.

The discharge of the earth and sand taken into the bucket 50 is
In the same manner as in the above embodiment, the bucket 50 is moved, for example, on the dump truck so that a predetermined earth discharging height h is reached, and the bucket cylinder 7 of the hydraulic excavator is operated at the position to move the movable body 52 to the soil. According to the above, the bucket 50 is swung so as to be obliquely downward or right below, and at the same time, the movable side body 52 is opened. The movable body 52 is opened by sending hydraulic oil from the hydraulic source of the hydraulic excavator body to the hydraulic cylinder 56 via the hydraulic pipe shown in FIG. This is performed by shortening the rod 56a to rotate the link 57 around the pin 58 and pushing the movable body 52 with the link 59 by the rotation. At this time, the movable body 52 is opened up to the position shown by the chain line in FIG. 10 with the pin 55 of the hinge 54 as the pivot. In the open state shown by the chain line, the locking portion 57a of the link 57 abuts the stopper 59a of the link 59, and both links 57, 59 are brought into a substantially serial state to maintain the open state of the movable body 52. In this case, the opening angle of the movable body 52 is determined by the engaging portion 57a and the stopper 59a.
It is possible to adjust by shifting the contact position of.

The opening operation of the movable-side body 26 is possible regardless of whether the opening of the bucket 6 is obliquely downward or directly below, so that any soil of any soil can be smoothly discharged, and in this case, the movable body 26 is movable. Although the pivoting fulcrum of the side body 52 is on the bottom plate 53, the swinging of the bucket 50 causes the bucket 50 to be slanted or leveled for soil removal.
Can be made lower than that of the conventional structure in which the bottom lid is opened, and the vertical stroke of the hydraulic excavator at the time of soil removal can be reduced to improve work efficiency, while at the same time the soil discharge height h can be reduced. It becomes possible to take it higher than before.

The closing operation of the movable body 52 after soil removal is performed by the hydraulic cylinder 56.
Is performed by reversing the supply of pressure oil to the reverse of the opening operation.

In narrow and deep grooves formed by continuous vertical hole excavation that is continuously repeated at appropriate pitches, large and small boulders are usually scattered at the bottom of the groove, and collapsed earth and sand around the groove accumulates. ,
In this embodiment, these deposits are discharged through the groove by the operation shown in FIG. 14 with the movable body 52 open. In FIG. 14, 1'is a main body of a wheel type hydraulic excavator, 1'a is a lower traveling body of the main body 1 ', and 1'b is a main body 1'.
It is a turning device. In the discharging operation, the movable-side body 52 is opened to the state shown by the chain line in FIG. 10, and in the opened state, the bucket 50 is hydraulically locked so as not to be rotated by an external force, and the hydraulic excavator is operated to move the bucket 50 in the direction of arrow d. Move it and scoop up earth and sand 60 and boulders. This scooping work is done on the movable body
Since the surface of the area of the groove 52 facing the groove bottom surface is formed in a flat bottom shape, the earth and sand 60 can be efficiently scooped into the movable body 52. When the bucket 50 is filled with the scooped soil 60, cobblestones, etc., the movable body 52 is closed, the hydraulic excavator is operated, and the bucket 50 is moved to a dumping place such as a dump truck. To remove soil. Further, the excavation of earth and sand accumulated in the groove 48 and the bottom scooping operation of the groove described in FIG. 9 are performed by opening the movable side body 52 in the same manner as the scooping operation of the earth and sand 60. This can be performed in the same manner as in the first embodiment, and the bucket 50 can be moved like an original excavation bucket of a hydraulic excavator to efficiently excavate the sediment 60 and excavate the bottom in a short time. it can.

Although not shown, in the second embodiment as well as in the first embodiment, the fixed side body 51 and the movable side body 51
It is possible to provide a convex body and a concave body at the joint with 52 to engage with each other, and to transmit the torque due to the excavation resistance to both integrally, and also to have a draft in the opening of the bucket 50. It is also possible to provide a bent plate material.

EFFECT OF THE INVENTION Since the present invention is configured as described above,
A narrow and deep groove can be efficiently formed with good excretion and operability. Furthermore, it can be used for grasping the cobbles, earth and sand, etc. left on the groove bottom, scooping the bottom, and scooping. There is an effect that it can be easily performed and can be efficiently discharged.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing the overall construction of a first embodiment of a rotating bucket according to the present invention, FIG. 2 is a bottom view of FIG. 1, and FIG. 3 is a view taken along the line III-III of FIG. , Fig. 4 is IV- in Fig. 3.
IV sectional view, FIG. 5 is a sectional view taken along line VV of FIG. 1, FIG. 6 is an enlarged view taken along the line VI-VI of FIG. 5, FIG. 7, FIG. 8 and FIG. 9 are shown in FIG. It is explanatory drawing of the working state example of the hydraulic excavator which attached the rotating bucket shown. FIG. 10 is a longitudinal sectional view showing the overall construction of a second embodiment of the rotating bucket according to the present invention, FIG. 11 is a bottom view of FIG.
12 is a sectional view taken along line XII-XII in FIG. 10, and FIG. 13 is taken along line XIII in FIG.
14 is a cross-sectional view taken along the line -XIII, and FIG. 14 is an explanatory diagram of an example of a working state of the wheel hydraulic excavator equipped with the rotary bucket shown in FIG. FIG. 15 is an overall view showing an example of a conventional rotary bucket. 6,11,50 …… Bucket, 8,15 …… Bracket, 10,17 ……
Hydraulic motor, 19 …… Bearing, 21,51 …… Fixed side body, 24 …… Cutter, 25 …… Side cutter, 26,52 …… Movable side body, 27 …… Concave body, 28 …… Convex body, 29 ... Rotating means, 37 ... Plate, 44 ... Top plate, 46,53 ... Bottom plate, 54 ...
… Hinges, 56 …… hydraulic cylinders, 57,59 …… links.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hironobu Munakata 1-6-1 Meguro, Meguro-ku, Tokyo Within Meguro Makoto Shinken Co., Ltd. (72) Inventor Koji Kumazawa 650 Kintate-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Incorporated company Tsuchiura Plant (72) Inventor Toru Uchino 650 Kintatecho, Tsuchiura City, Ibaraki Prefecture Hitachi Construction Machinery Incorporated Tsuchiura Plant (72) Inventor Shinichi Ono 650 Kintatemachi, Tsuchiura City, Ibaraki Hitachi Construction Machinery Co., Ltd. Ceremony Company Tsuchiura Factory

Claims (7)

[Claims] 1. A bracket for mounting a bucket swingably on a hydraulically driven working machine, a bucket rotating hydraulic motor and a bearing mounted on the bracket, and the bracket rotatably via the bearing. In a rotary bucket for vertical hole excavation, which is attached to a bracket and has a cylindrical bucket in which a plurality of cutters are fixed to the bottom surface for excavating the sediment when the bucket is rotated and incorporating the excavated earth and sand into the inside, the side surface of the bucket. And a fixed-side body with a part of the bottom face cut out, a movable-side body that opens and closes the cutout portion by providing a rotation fulcrum in the cutout portion of the fixed-side body, A rotating bucket provided on the fixed side body for rotating the movable side body to open and close at an arbitrary angle. 2. The rotary bucket according to claim 1, wherein a rotary fulcrum of the movable body is provided on an upper portion of the bucket. 3. The rotary bucket according to claim 1, wherein a pivotal fulcrum of the movable body is provided on a bottom surface of the bucket. 4. The rotary bucket according to claim 2, wherein plates are attached to both sides of the inner surface of the fixed side body with a draft having a gap between the two plates widened toward the notch. 5. A structure in which a convex body is provided on one of the joints of the fixed body and the movable body and a concave body is provided on the other side so that the convex body and the concave body mesh with each other during excavation. Item 2. A rotating bucket according to item 2. 6. A link mechanism for holding the open state of the movable side body when the movable side body is in an open state and folding the movable side body in the fixed side body when the movable side body is in a closed state. The rotating bucket according to claim 3, wherein the rotating bucket is configured to open and close. 7. A rotary bucket according to claim 3, wherein the outer periphery of the movable-side body is flat-bottomed in a part of the range facing the groove bottom surface when the movable-side body is in the open state.