WO2015129345A1

WO2015129345A1 - Bucket-type compacting device

Info

Publication number: WO2015129345A1
Application number: PCT/JP2015/051549
Authority: WO
Inventors: 敏治植田
Original assignee: ウエダ産業株式会社
Priority date: 2014-02-25
Filing date: 2015-01-21
Publication date: 2015-09-03
Also published as: JPWO2015129345A1

Abstract

Provided is a bucket-type compacting device that can improve compacting performance while simplifying the structure of the bucket-type compacting device. The present invention is a bucket-type compacting device (20) comprising a bucket (10) for excavation work that is coupled to the distal end of an arm (7) of a hydraulic shovel (1), a compacting plate (21) that is movably coupled to the bucket (10), a compacting plate supporting mechanism (30) that supports the compacting plate (21) so as to be movable with respect to the bucket (10), and a hydraulic cylinder (31) for reciprocally driving the compacting plate (21) in the compacting direction, wherein the compacting plate supporting mechanism (30) comprises a plurality of parallel link members (32), one end of which is rotatably coupled to a wall portion (10a, 10b) of the bucket (10) and the other end of which is rotatably coupled to the compacting plate (21), and the bucket-type compacting device is configured so that the compacting plate (21) can be reciprocally driven in the direction of compacting and in the direction orthogonal to the compacting by way of the hydraulic cylinder (31) via the compacting plate supporting mechanism (30).

Description

Bucket type compaction device

The present invention relates to a bucket type rolling device connected to the tip of an arm of a hydraulic excavator.

Conventionally, compaction devices such as rammers and compactors that directly hit the ground have been used for compaction against earth and sand. When a rolling operation is performed using this type of compaction device, the burden on the operator is large due to the generated sound and vibration. In order to solve this problem, the present applicant has proposed a bucket-type compacting device in which a compaction plate is attached to a bucket of a hydraulic excavator.

The bucket-type compaction device of Patent Document 1 includes a hydraulic reciprocating vibration cylinder pivotally supported on a back plate of a bucket and a compaction plate pivotally supported on a lower side of the bucket bottom plate with a pin as a fulcrum. And the rear end portion of the piston rod of the hydraulic reciprocating vibration cylinder is rotatably attached to the rolling plate. In this bucket type compacting device, in addition to excavation work on the ground with the bucket, compaction of the groove bottom and compacting of the slope such as a slope can be performed by a minute amplitude operation of the compaction plate.

In the bucket-type rolling device of Patent Document 1, since the rolling plate is swingably mounted on the lower side of the bucket bottom plate with a pin as a fulcrum, when the piston rod of the hydraulic reciprocating vibration cylinder is extended, the rolling plate Swings around the pin as a fulcrum and compacts earth and sand. Therefore, in the area near the pin of the compaction plate, the amplitude of the compaction plate is smaller than that in the region far from the pin. There is concern about the difference in level. Therefore, the present applicant has proposed a bucket-type rolling device that can eliminate unevenness in the amount of rolling.

The bucket-type rolling compactor disclosed in Patent Document 2 is provided with a plurality of guide mechanisms for guiding the compaction plate so that the compaction plate disposed below the bottom of the bucket moves in the compaction direction, and the compaction plate is elastically attached to the bottom of the bucket. A plurality of elastic urging mechanisms for energizing, and a rolling plate support driving mechanism for reciprocating the rolling plate in the rolling direction using a hydraulic motor.

JP 2002-97657 A JP 2011-26878 A

In the bucket-type rolling device of Patent Document 2, since the operation stroke in the rolling direction of the rolling plate is adjusted uniformly over the entire rolling plate, the difference in amplitude of the rolling plate is eliminated, and after rolling It is possible to prevent the occurrence of a step due to the unevenness of the rolling pressure on the construction surface.
However, this bucket-type compaction device requires a plurality of mechanisms such as a link mechanism for adjusting the operation stroke evenly, which increases the number of parts and may increase the weight of the entire device.

Also, when the rolling plate presses the embankment in the rolling direction, end marks (striking marks) due to the edge of the rolling plate remain on the construction surface, so it cannot be said that the appearance after construction is sufficient. In addition, when there is a gap formed by the air contained in the soil in the embankment, even if the rolling plate presses the embankment uniformly in a single rolling direction, the gap corresponds to the rolling plate. However, the air cannot be completely removed from the soil after the compaction to the outside, and the compaction may be insufficient.

Moreover, in the bucket-type rolling compactors of

Patent Documents

1 and 2, when rolling a slope having a predetermined gradient angle with respect to a horizontal plane, it is necessary to change the bucket posture so that the rolling plate follows the slope. When rolling down the lower part of the slope, the cutting edge of the bucket may interfere with the ground, and sufficient rolling may not be possible.

The rolling force of the rolling plate (the force in the rolling direction) is set as an exciting force by utilizing a repulsive force of a driving force generated by a hydraulic reciprocating vibration cylinder as in Patent Document 1 or a hydraulic motor as in Patent Document 2.
In the case of driving by a hydraulic reciprocating vibration cylinder, since the hydraulic reciprocating vibration cylinder is supported by a bucket, the rolling pressure is restricted by the weight of the hydraulic excavator including the arm, etc. Is regulated by the weight of the flywheel.
In other words, when a high rolling pressure is required, a bucket-type rolling device having a large hydraulic excavator or a large flywheel must be formed, and as a result, the entire device may be increased in size.

An object of the present invention is to provide a bucket-type compacting device capable of improving the compaction performance while simplifying the structure.

The bucket-type compaction device according to claim 1 is a bucket for excavation work connected to a tip portion of an arm of a hydraulic excavator, a compaction plate movably coupled to the bucket, and the compaction plate with respect to the bucket. In a bucket-type rolling device provided with a rolling plate support mechanism that is movably supported and a hydraulic cylinder that reciprocally drives the rolling plate in the rolling direction, the rolling plate support mechanism has one end at the wall of the bucket. A parallel link mechanism having a plurality of parallel link members rotatably connected to the pressure plate and having the other end rotatably connected to the pressure plate, and the pressure plate via the pressure plate support mechanism by the hydraulic cylinder. Is configured to be capable of reciprocating in a rolling direction perpendicular to the rolling plate and in a direction perpendicular to the rolling direction.

In this bucket type compaction device, the compaction plate is reciprocally driven in a compaction direction perpendicular to the compaction plate and in a direction perpendicular to the compaction direction by a compaction plate support mechanism having a hydraulic cylinder and a plurality of parallel link members. With a simple structure, air can be completely removed from the soil after rolling.

The invention of claim 2 is characterized in that, in the invention of claim 1, the hydraulic cylinder includes a reciprocating mechanism for reciprocating the piston rod in the vertical direction while supplying pressurized oil in one direction.
Thereby, control for reciprocating the piston rod of the hydraulic cylinder in the vertical direction can be easily performed, and the apparatus can be made compact.

According to a third aspect of the present invention, in the first aspect of the present invention, a gripping frame pivotally attached to the bucket and capable of opening and closing with respect to an opening edge of the bucket is provided, and the gripping frame is closed. The bucket is capable of excavation work, and the gripping frame is opened and closed to enable gripping work.
As a result, excavation work, rolling work, and gripping work can be performed with a single device, so that device replacement work can be omitted.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a pair of gripping frame hydraulic cylinders for opening and closing the gripping frame are provided, and when viewed from the opposite direction to the bucket opening edge, The pair of gripping frame hydraulic cylinders are arranged on both sides.
Thereby, since the arrangement space of the hydraulic cylinder can be used as the arrangement space of the hydraulic cylinder for the gripping frame, further downsizing can be achieved.

According to a fifth aspect of the present invention, in the first aspect of the invention, the compaction plate is provided in a horizontal state for subjecting to compaction, and is integrally formed with the main compaction unit and intersects the main compaction unit. And a weight portion is provided at an upper end portion of the sub-rolling portion.
Thereby, it is possible to execute the rolling operation on the horizontal plane and the rolling operation on the slope without changing the bucket posture.

According to a sixth aspect of the present invention, in the first aspect of the invention, the hydraulic cylinder includes a main body portion whose middle portion is supported by the bucket and whose lower end side portion is connected to the compaction plate, and an upper end side portion of the main body portion. And a piston rod that can be reciprocated in the vertical direction, and one or a plurality of detachable weight portions are provided at the upper end of the piston rod.
Thereby, a rolling force can be adjusted by changing the weight of a weight part.

According to a seventh aspect of the present invention, in the first aspect of the invention, the bucket is connected to a distal end portion of the arm of the hydraulic excavator via a holder portion, and the holder portion is more than the arm side holder portion and the arm side holder portion. A bucket side holder portion on the bucket side, and a damping member is provided between the arm side holder portion and the bucket side holder portion.
Thereby, vibration and noise during the rolling operation can be suppressed.

According to the present invention, it is possible to improve the rolling performance while simplifying the structure of the bucket type rolling device.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the hydraulic shovel which concerns on Example 1 of this invention, (a) is a figure which rolls a horizontal surface in a main rolling part, (b) is when rolling a slope which becomes so high that it separates from a hydraulic shovel. FIG. 4C is an external view of the main part when rolling down a slope that becomes lower as it is separated from the excavator. It is a perspective view of a bucket type compacting device. It is the figure seen from the front of a bucket type rolling compactor. It is the side view which abbreviate | omitted a part of side wall part of a bucket type rolling compactor. FIG. 5 is a view corresponding to FIG. 4 when the gripping frame is opened. It is a side view of a rolling-plate support mechanism when a piston rod is extended. FIG. 5 is a view corresponding to FIG. 4 at the time of sub-rolling work. It is a side view of a rolling-plate support mechanism when a piston rod is extended. FIG. 5 is a view corresponding to FIG. 4 during auxiliary work. It is a disassembled perspective view of a working device. It is a schematic side view of the bucket-type rolling compactor according to the second embodiment. It is a schematic side view of the bucket-type rolling compactor according to the third embodiment.

Hereinafter, modes for carrying out the present invention will be described based on examples.
In the following embodiments, the direction of the arrow F in the figure will be referred to as the front, the direction of the arrow L as the left, and the vertical direction as the vertical direction.

Hereinafter, Example 1 will be described with reference to FIGS.
First, a hydraulic excavator 1 that is an excavator excavator will be described.
As shown in FIG. 1, a hydraulic excavator 1 that is an excavator excavator is provided with a lower traveling body 2 having a pair of crawlers 4 and an upper portion of the lower traveling body 2 so that the operator can turn freely. It has the upper turning body 3 provided with the cab. A hydraulic pump (not shown) and an engine (not shown) for driving the hydraulic pump are disposed as a hydraulic supply source at the rear part of the upper swing body 3.

The hydraulic excavator 1 includes a boom 5 pivotally supported at the rear end portion by the upper swing body 3, a hydraulic boom cylinder 6 for tilting the boom 5, and a rear portion pivotable at the front end portion of the boom 5. An arm 7 pivotally supported on the arm 7, a hydraulic arm cylinder 8 that tilts the arm 7, and a bucket-type rolling device 20 that includes a bucket 10 that is coupled to the tip of the arm 7.

The arm 7 is pivotally supported at the front end portion of the boom 5 by an arm swinging shaft 7a.
The base end portion of the cylinder body of the hydraulic boom cylinder 6 is rotatably connected to the middle portion of the boom 5, and the tip end portion of the piston rod of the boom cylinder 6 is rotatably connected to the rear end portion of the arm 7. ing. When the boom cylinder 6 extends or contracts, the arm 7 swings about the arm swing shaft 7a.

A connecting pin 12 that connects the holder portion 11 of the bucket 10 so as to be swingable and a hydraulic bucket cylinder 13 that swings the bucket 10 around the connecting pin 12 are provided at the tip of the arm 7. The base end portion of the cylinder body of the bucket cylinder 13 is rotatably connected to the upper portion of the arm 7. The bucket 10 is an attachment that can be attached to and detached from the hydraulic excavator 1, and is detachably connected to the front end portion of the arm 7 by a connecting pin 12 and a connecting pin 14.

Next, the bucket type compacting device 20 will be described.
As shown in FIGS. 1 to 5, a bucket-type compacting device 20 includes a bucket 10 for excavation work connected to the tip of an arm 7 of a hydraulic excavator 1, and a compaction plate movably connected to the bucket 10. 21 and a rolling plate support mechanism 30 that movably supports the rolling plate 21 with respect to the bucket 10. This bucket-type compacting device 20 performs excavation work for excavating earth and sand, main rolling work for rolling a horizontal surface, sub-rolling work for rolling an inclined slope, and gripping objects without exchanging attachments. Various operations such as a gripping operation for gripping, an auxiliary operation for rolling a confined portion, concrete crushing, and the like can be performed by a single device.

The bucket 10 includes a pair of side wall portions 10a that are opposed to each other in parallel by a predetermined distance from the left and right, and a bottom wall portion 10b that spans between the pair of side wall portions 10a. A front wall portion 10c extending substantially vertically upward from a front end portion of the bottom wall portion 10b, an upper wall portion 10d extending in a forward and downward inclined manner from the upper end portion of the front wall portion 10c in the front-rear direction, and a gripping mechanism 40 are provided. ing.
A space portion S1 capable of accommodating excavated earth and sand or the like inside by a rear side portion of the pair of side wall portions 10a, a bottom wall portion 10b, a front wall portion 10c, and a rear side portion of the upper wall portion 10d. Forming. This space portion S1 includes an opening edge portion 10s opened rearward.
Above the upper wall portion 10d, an outer wall portion 10e that partially covers the upper wall portion 10d with a predetermined distance is provided.

The pair of side wall portions 10a is formed to extend forward from the front wall portion 10c.
Accordingly, a front opening for accommodating a part of the rolling plate support mechanism 30 (hydraulic cylinder 31) by the front side portion of the pair of side wall portions 10a, the front wall portion 10c, and the front half portion of the upper wall portion 10d. A space portion S2 is formed.
The pair of side wall portions 10a are formed so as to extend above the upper wall portion 10d.
Thereby, a part of the gripping mechanism 40 (hydraulic cylinder 42) is formed in front of the front wall portion 10c by the upper portion of the pair of side wall portions 10a, the front half portion of the upper wall portion 10d, and the outer wall portion 10e. A space portion S3 for accommodating is formed. This space part S3 is arrange | positioned so that it may overlap with the upper side of space part S2.

The bottom wall portion 10b has a front portion 10v formed in a substantially horizontal shape, a rear portion 10w formed in a forward and downward inclined shape, and an intermediate portion 10x connecting the rear end of the front portion 10v and the front end of the rear portion 10w. Are integrally formed in a downwardly inclined manner. The lower surface of the front portion 10v and the intermediate portion 10x of the bottom wall portion 10b faces a part of the rolling plate 21. The connecting boundary portion (bent portion) between the intermediate portion 10x and the rear portion 10w is set so as to be positioned between the lower surface of the rolling plate 21 and the rear end portion of the rear portion 10w during excavation work. .
As a result, a space S4 for accommodating a part of the rolling plate support mechanism 30 (two sets of parallel link mechanisms L) is formed below the intermediate part 10x and the front part 10v of the bottom wall part 10b.
In the space portion S2, in order to support the hydraulic cylinder 31, a support portion 15 that is joined to the front wall portion 10c and the upper wall portion 10d in the middle portion in the left-right direction is provided.

Next, the gripping mechanism 40 will be described.
As shown in FIGS. 2, 4, and 5, the gripping mechanism 40 includes a substantially U-shaped gripping frame 41 that can be opened and closed with respect to the opening edge 10 s, and a left and right for opening and closing the gripping frame 41. And a pair of hydraulic cylinders 42 (grip frame hydraulic cylinders).
After the gripping frame 41 is opened, a gripping operation for gripping the gripping object is executed by sandwiching the gripping object between the gripping frame 41 and the opening edge 10 s of the bucket 10.
Note that the grip frame 41 is maintained in a closed state when excavation work, main rolling work, auxiliary rolling work, and auxiliary work are executed.

The grip frame 41 has a pair of left and right arm portions 41a that are parallel and substantially linear, and a linear blade edge portion 41b that connects the tip portions of the pair of left and right arm portions 41a.
The pair of left and right arm portions 41a is pivotally attached to the rear end portion of the upper wall portion 10d via a shaft portion 41c provided at the base end portion.

The pair of left and right arm portions 41a are disposed so as to be in sliding contact with the left and right outer sides of the pair of left and right side wall portions 10a, respectively, and when closed, the front (lower) side portion is the rear (upper) side of the side wall portion 10a. It is formed so as to partially overlap the part. As shown in FIG. 5, the arm portion 41 a includes a wavy blade portion 41 d at the lower tip portion, and when gripping an object to be gripped, the wavy blade portion 10 f provided at the upper rear end portion of the side wall portion 10 a. It is configured to be able to bite the object to be grasped in cooperation with.
The blade edge portion 41b is provided with a plurality of (for example, five) wedge-shaped teeth.
The blade edge portion 41b is disposed so as to abut the rear end portion of the rear portion 10w and form the same surface connected to the rear portion 10w when the grip frame 41 is closed.

The pair of left and right hydraulic cylinders 42 are accommodated in the space S3 so as to extend in the front-rear direction along the upper wall portion 10d, and the base end portions of the main body portions 42a are respectively connected to the side wall portions 10a. The tip is pivotally attached to a position in the vicinity of the shaft portion 41c of the arm portion 41a. As a result, the pair of left and right hydraulic cylinders 42 closes the grip frame 41 around the shaft portion 41c when the piston rod 42b extends, and moves the grip frame 41 around the shaft portion 41c when the piston rod 42b contracts. Open operation.

Next, the rolling plate 21 will be described.
As shown in FIGS. 2 to 6, the rolling plate 21 is integrated with the main rolling portion 21a and a substantially horizontal main rolling portion 21a facing the front portion 10v and the intermediate portion 10x of the bottom wall portion 10b. And a sub-rolling portion 21b extending from the front end portion of the main rolling portion 21a in a forward upward inclined manner.
The lateral width of the rolling plate 21 is set to be substantially the same as the separation distance between the pair of side wall portions 10a. In addition, when the construction area which rolls is large, a rolling efficiency can be improved by using the rolling plate of the width | variety (for example, 2 times or more) larger than the separation distance of a pair of side wall part 10a.

The main rolling part 21a is formed in a substantially rectangular shape, and extends in the front-rear direction from the front end part of the upper wall part 10d so as to correspond to the rear end part of the intermediate part 10x of the bottom wall part 10b. The rear end portion of the main rolling portion 21a is provided with a rising portion 21c that rises upward.
The main rolling part 21a includes an upper projecting first pivot part 21e for pivotally supporting the piston rod 31b of the hydraulic cylinder 31 at the center part, and a position in the vicinity of the side part of the first pivot part 21e. There are provided an opening 21g (see FIG. 10) formed in a penetrating shape, an upward projecting connection portion 21h provided at each corner of the four corners, and the like.
The main rolling unit 21a mainly performs main rolling work, but is configured to be able to perform sub-rolling work on the slope by changing the posture of the bucket 10. In the following description, an example in which the main rolling operation is performed by the main rolling unit 21a and an example in which the sub rolling operation is performed by the sub rolling unit 21b will be mainly described.

The sub-rolling portion 21b is formed in a substantially rectangular shape, and is formed so that the crossing angle formed with the main rolling portion 21a is 150 ° or less (eg, 135 °). A rising portion 21d that rises upward is provided at the front end portion of the sub-rolling portion 21b. A weight portion 22 that has a predetermined weight (for example, 300 kg) and extends in the left-right direction is attached to the rising portion 21d. Has been.
The weight part 22 is configured to be detachable from the rising part 21d. For example, when performing excavation work, the weight part 22 can be detached from the rising part 21d. Further, a plurality of types of weight portions 22 having different weights are prepared, and are formed so as to be replaceable according to the rolling operation.
At the front central portion of the sub-rolling portion 21b, there is an upper projecting second pivot portion 21f for rotatably connecting the tip of the piston rod 31b of the hydraulic cylinder 31 during the sub-rolling operation and auxiliary work. Is provided.

Next, the rolling plate support mechanism 30 will be described.
As shown in FIGS. 3 to 6, the rolling plate support mechanism 30 includes a rolling plate orthogonal to the rolling direction (vertical direction) of the rolling plate 21 parallel to the axis of the hydraulic cylinder 31 and the axis of the hydraulic cylinder 31. It is configured to be able to reciprocate in the direction (front-back direction).
The rolling plate support mechanism 30 includes a hydraulic cylinder 31 capable of reciprocatingly driving the rolling plate 21 in the rolling direction, and two sets of parallel link mechanisms L for converting the operation stroke of the hydraulic cylinder 31 into an arc motion by the rolling plate 21. And.

The hydraulic cylinder 31 is accommodated in the space portion S2 and is disposed so as to extend in the vertical direction along the front wall portion 10c. The hydraulic cylinder 31 is disposed between the pair of hydraulic cylinders 42 as viewed from the front. That is, by disposing the hydraulic cylinders 42 on both the left and right sides of the hydraulic cylinder 31, the front side space than the front wall portion 10 c formed for disposing the hydraulic cylinder 31 is also used as a space for disposing the hydraulic cylinder 42. We are trying to make it more compact.

The hydraulic cylinder 31 is supplied with pressurized oil from the hydraulic pump of the excavator 1, and includes a main body 31a that houses a piston (not shown), and an extendable piston rod 31b. A reciprocating mechanism (not shown) for reciprocating the piston rod 31b in the vertical direction while supplying pressurized oil in one direction is provided inside the main body 31a of the hydraulic cylinder 31.
In the hydraulic cylinder 31, the base end portion of the main body 31a is rotatably connected to the support portion 15, and the tip of the piston rod 31b is rotatably connected to the first pivotal support portion 21e.

The reciprocating mechanism halves the impact sound and noise by allocating the ratio of the force in the rolling direction (rolling pressure) and the force in the reverse pressure direction, for example, to 95: 5. The ratio of the force in the rolling direction and the force in the reverse pressure direction of the hydraulic cylinder 31 is not limited to the above ratio. For example, as in 6 to 4, at least the force in the rolling direction is made larger than the force in the reverse pressure direction. The effect can be obtained.
In addition, since the hydraulic cylinder 31 is set to have a driving force that can raise the weight portion 22, it increases the force in the rolling direction by the weight of the weight portion 22 in addition to the hydraulic pressure of the pressurized oil during rolling. Thus, the rolling workability can be improved.
The specific configuration of the reciprocating mechanism has been filed by the present applicant (Japanese Patent No. 3523100) and has already been a well-known technique, and thus detailed description thereof will be omitted.

The two sets of parallel link mechanisms L are provided on both the left and right sides with the first pivotal support 21e interposed therebetween. Since the right parallel link mechanism L has the same configuration as the left parallel link mechanism L, the left parallel link mechanism L will be mainly described below.
The parallel link mechanism L is composed of a pair of identical and long parallel link members 32 arranged in parallel in the front-rear direction. An upper end portion of the front parallel link member 32 is rotatably connected to a connecting portion 10g provided at a lower portion of the side wall portion 10a, and a lower end portion is provided at a front side corner portion of the main rolling portion 21a. It is rotatably connected to the connecting portion 21h. Similarly, the upper end portion of the rear parallel link member 32 is rotatably connected to a connecting portion 10h provided at the rear portion of the front portion 10v, and the lower end portion is connected to the rear corner portion of the main rolling portion 21a. It is rotatably connected to the provided connecting portion 21h.

As shown in FIG. 4, the pair of parallel link members 32 intersect with the axis C of the hydraulic cylinder 31 at a predetermined first angle (for example, 30 to 45 °) when the piston rod 31b contracts. 6 and a second angle smaller than the first angle with respect to the axis C of the hydraulic cylinder 31 that has slightly swung with respect to the vertical line V when the piston rod 31b extends as shown in FIG. Various conditions such as the length of the parallel link member 32, the installation angle, and the arrangement position are set so as to intersect each other. Thereby, it can roll while maintaining the horizontal attitude | position of the main rolling part 21a, and the main rolling part 21a can be reciprocated by the hydraulic cylinder 31 in a rolling direction and a rolling orthogonal direction.

Next, the sub-rolling operation will be described.
The bucket-type compacting device 20 is configured to be able to compact a slope having a predetermined gradient angle with respect to a horizontal plane without changing the posture of the bucket 10 by using a sub-compressing portion 21b that is inclined forward and upward. ing.

As shown in FIGS. 7 and 8, when the sub-rolling operation is performed, the connection between the tip of the piston rod 31b of the hydraulic cylinder 31 and the first pivotal support 21e is released in advance, and the tip of the piston rod 31b and the second The pivot part 21f is pivotally connected.
As shown in FIG. 7, when the piston rod 31 b contracts, the sub-rolling portion 21 b moves backward along the direction of the axis C of the hydraulic cylinder 31 and comes closest to the bucket 10. As shown in FIG. 8, when the piston rod 31 b extends, the sub-rolling portion 21 b advances in the direction of the axis C of the hydraulic cylinder 31 and is farthest from the bucket 10. Accordingly, the slope can be rolled by the sub-rolling portion 21b by the reciprocating motion of the piston rod 31b without changing the posture of the bucket 10.

Next, auxiliary work will be described with reference to FIGS.
This bucket-type compacting device 20 is configured to be able to perform assisting operations such as compacting of narrowed portions and concrete crushing by attaching the assisting device 50 to the sub-compressing portion 21b.
As shown in FIGS. 9 and 10, the auxiliary device 50 includes a mounting portion 50 a for mounting on the compaction plate 21, a rod-like extension portion 50 b having a base end fixed to the mounting portion 50 a, and the extension portion. And a disc-shaped rolling compaction portion 50c that is fixed to the tip end portion of 50b and has a smaller diameter than the longitudinal length of the secondary rolling compaction portion 21b.

The mounting portion 50a is formed so as to cover the sub-rolling portion 21b and the front portion of the main rolling portion 21a in a close contact manner from below. The front end portion of the mounting portion 50a is provided with an engaging portion 50d having a substantially U-shaped cross section that can be engaged with the rising portion 21d to which the weight portion 22 is mounted. An upward projecting locking portion 50e is provided which can be inserted into the opening 21g in a state where 50 is mounted on the rolling plate 21. In addition, when performing an auxiliary | assistant operation | work, the piston rod 31b of the hydraulic cylinder 31 is connected with the 2nd pivotal support part 21f.

As shown in FIG. 10, when the auxiliary device 50 is mounted on the rolling plate 21, the engaging portion 50d is engaged with the weight portion 22 (rising portion 21d), and at the same time, the engaging portion 50e is inserted through the opening 21g. After that, the connecting pin 51 is inserted through the opening of the locking part 50e and the opening of the first pivotal support part 21e to connect the rolling plate 21 and the auxiliary device 50. Here, the example of the auxiliary device 50 for rolling compaction has been described, but various auxiliary operations can be performed by changing the extension portion 50b and the rolling portion 50c to different working members.

Next, the operation and effect of the bucket type compacting device 20 will be described.
When excavation work is performed, the piston rod 42b of the hydraulic cylinder 42 is contracted to close the gripping frame 41, and the piston rod 31b of the hydraulic cylinder 31 is contracted to bring the rolling plate 21 closest to the bottom wall 10b. Thereafter, by operating the boom cylinder 6, the arm cylinder 8, the bucket cylinder 13, etc., the earth and sand are excavated using the bucket 10.
Since the pair of left and right arm portions 41a are arranged so as to overlap the left and right outer sides of the side wall portion 10a, the bucket excavated and accommodated between the arm portion 41a and the side wall portion 10a is prevented from leaking, while The strength of 10 can be ensured.

When performing the gripping operation, the piston rod 31b of the hydraulic cylinder 31 is contracted to bring the rolling plate 21 closest to the bottom wall portion 10b. By operating the boom cylinder 6, the arm cylinder 8, the bucket cylinder 13, etc., the bucket type rolling device 20 is moved to the vicinity of the object to be grasped, and the piston rod 42 b of the hydraulic cylinder 42 is extended to open the grasping frame 41. After the operation, the gripping frame 41 is closed so as to sandwich the gripping object, the gripping object is gripped, and transported / moved. Without exchanging the attachment connected to the tip end of the arm 7 of the excavator 1 during excavation work or rolling work, the object to be grasped can be transported and moved to be removed.

When performing the rolling operation by the main rolling unit 21a, the piston rod 42b of the hydraulic cylinder 42 is extended to close the gripping frame 41, and the piston rod 31b is coupled to the coupling unit 21e. While supplying one-way pressurized oil to the hydraulic cylinder 31, the rolling plate 21 can be driven to reciprocate between the backward movement position shown in FIG. 4 and the forward movement position shown in FIG.
Further, the trajectory of the rolling plate 21 moving from the backward movement position to the forward movement position becomes an arc motion by the lower end portion of the parallel link member 32 pivotally supported by the

wall portions

10a and 10b of the bucket 10, so that the rolling plate 21 is The work surface can be rolled in the direction perpendicular to the rolling direction while rolling in the rolling direction. Therefore, generation | occurrence | production of the edge part trace of the rolling plate 21 can be prevented, and air can be completely removed outside from the soil.

When performing the rolling operation by the sub-rolling portion 21b, the piston rod 42b of the hydraulic cylinder 42 is extended to close the gripping frame 41, and the piston rod 31b is connected to the connecting portion 21f. Since the rolling plate 21 is reciprocated between the backward movement position shown in FIG. 7 and the forward movement position shown in FIG. 8, the horizontal rolling operation by the main rolling unit 21a is followed by the bucket-type rolling device 20. The pressure can be applied to the slope without changing the posture, and interference between the cutting edge portion 41b and the ground can be avoided.

When performing the auxiliary work, the piston rod 42b of the hydraulic cylinder 42 is extended to close the gripping frame 41, the piston rod 31b is connected to the connecting portion 21f, and the auxiliary device 50 is attached to the rolling plate 21. By reciprocatingly driving the rolling plate 21, the rolling unit 50c can perform rolling pressure even in a narrow place or a remote place where the bucket 10 is difficult to enter.
Further, the auxiliary device 50 is another auxiliary device, for example, a crushing auxiliary device in which a wedge portion is fixed to the mounting portion 50a, a pile driving auxiliary device in which a pipe holder is fixed to the mounting portion 50a, and a grinding device is fixed to the mounting portion 50a. Various operations can be performed by exchanging the auxiliary grinding device and the stirring device with the auxiliary soil stirring device fixed to the mounting portion 50a.
In addition, working parts, such as a wedge part and a pipe holder, are being fixed to the mounting part 50a so that it may become coaxial with respect to the piston rod 31b.

According to the bucket type compacting device 20, the compaction plate 21 is perpendicular to the compaction plate 21 and the compaction direction by means of the compaction plate support mechanism 30 including the hydraulic cylinder 31 and the plurality of parallel link members 32. Since it reciprocates in the direction, air can be completely removed to the outside from the soil after rolling with a simple structure. That is, it is possible to improve the rolling performance while simplifying the structure of the bucket type rolling device 20.

Since the hydraulic cylinder 31 includes a reciprocating mechanism that reciprocates the piston rod 31b in the vertical direction while supplying pressurized oil in one direction, hydraulic control for reciprocating the piston rod 31b can be omitted. Compactness can be achieved.
A gripping frame 41a pivotally attached to the bucket 10 and capable of opening and closing with respect to the opening edge 10s of the bucket 10 is provided, and excavation work can be performed by the bucket 10 with the gripping frame 41a closed, and the gripping frame 41a is opened and closed to enable gripping work. As a result, excavation work, rolling work, and gripping work can be performed with a single device, so that device replacement work can be omitted.

A pair of hydraulic cylinders 42 for opening and closing the grip frame 41a are provided, and the pair of hydraulic cylinders 42 are disposed on both sides of the hydraulic cylinder 31 when viewed from the opposite direction to the bucket opening edge 10s. This space can be used as a space for the hydraulic cylinder 42, and further downsizing can be achieved.
A main rolling section 21a that is used for rolling the rolling plate 21 in a horizontal state, and a sub rolling section 21b that is formed integrally with the main rolling section 21a and intersects the main rolling section 21a. And since the weight part 22 was provided in the upper side edge part of the sub-rolling part 21b, the rolling operation of a horizontal surface and the rolling operation of a slope can be performed, without changing the attitude | position of the bucket 10. FIG.

Next, a bucket type compacting device 20A according to the second embodiment will be described with reference to FIG.
The bucket type compacting device 20 of the first embodiment is supported by the bucket 10 and reciprocatingly driven the compaction plate 21 using the reaction force from the bucket 10, whereas the bucket type compacting device 20A of the second embodiment is The lower end portion of the main body 31c of the hydraulic cylinder 31A supported by the bucket 10 is connected to the rolling plate 21A via a support member (for example, hard rubber or the like) whose middle stage can be slightly displaced up and down, and directly by the hydraulic cylinder 31A. The rolling plate 21A is driven to reciprocate with a typical striking force. In addition, the same code | symbol is attached | subjected about the structure similar to Example 1. FIG.

As shown in FIG. 11, the rolling plate support mechanism 30A includes a hydraulic cylinder 31A that can reciprocate the rolling plate 21A in the rolling direction, and a left and right for converting the operation stroke of the hydraulic cylinder 31A into an arc motion of the rolling plate 21A. Two sets of parallel link mechanisms L are provided.

The rolling plate 21A is formed in a rectangular shape. The rolling plate 21A is provided with a rising portion 21j rising upward at the front end portion and a rising portion 21k rising upward at the rear end portion. On the upper surface of the rolling plate 21A, a pivotal support portion 21m is provided at the center portion on the front end side, and two pairs of connecting portions 21n separated in the front-rear direction are provided at the left and right end portions on the rear side of the pivotal support portion 21m. . The parallel link member 32 is rotatably connected to two pairs of connecting portions 21n and connecting portions 10n formed on the front portion 10v of the bottom wall portion 10b so as to correspond to the connecting portions 21n. ing.

The hydraulic cylinder 31A is disposed in front of the front wall portion 10c so as to extend in the vertical direction along the front wall portion 10c. The hydraulic cylinder 31 includes a main body portion 31c and a piston rod 31d that can be expanded and contracted in the vertical direction, and a reciprocating mechanism (reciprocating mechanism) that reciprocates the piston rod 31d while supplying pressurized oil in one direction inside the main body portion 31c. (Not shown) is provided.
The hydraulic cylinder 31A is supported by a metal bracket 16 in which the lower end portion of the main body 31c is rotatably connected to the pivot 21m, and the middle portion of the main body 31c is fixed to the front wall 10c via hard rubber. Has been. A weight portion 23 having a predetermined weight is attached to the upper end of the piston rod 31d extending upward from the main body portion 31c. The weight portion 23 is configured to be detachable from the upper end portion of the piston rod 31d.
Note that a plurality of types of weight portions 23 having different weights are prepared in advance, and are formed so as to be replaceable according to the rolling operation.

When the piston rod 31d is extended, the weight portion 23 is raised by the pressing force of the hydraulic cylinder 31A, and when the piston rod 31d is contracted, the hydraulic pressure in the hydraulic cylinder 31A is released, so that the weight portion 23 is naturally lowered (dropped). ) At this time, since the elastic deformation slightly downward occurs in the hard rubber, the rolling plate 21A is driven with respect to the bucket 10 via the parallel link mechanism L in the rolling direction and the direction perpendicular to the rolling direction. Thereby, the rolling force according to the pressing force of the hydraulic cylinder 31A can be exhibited, and the rolling performance can be improved.

Next, the bucket type compacting device 20B according to the third embodiment will be described with reference to FIG.
In the bucket-

type compacting devices

20 and 20A of the first and second embodiments, the bucket 10 is swingably connected to the distal end portion of the arm 7 via the holder portion 11, whereas the bucket-type compacting device of the third embodiment is used. In 20B, the holder unit 11A has a damping function.
In addition, the same code | symbol is attached | subjected about the structure similar to Example 1,2.

As shown in FIG. 12, the bucket-type rolling compactor 20 </ b> B is movably connected to the bucket 10 for excavation work that is connected to the tip of the arm 7 of the excavator 1 via the holder portion 11 </ b> A. The rolling plate 21 and a rolling plate support mechanism 30B that movably supports the rolling plate 21 with respect to the bucket 10 are provided.

The holder portion 11A includes an arm-side holder portion 11a that is swingably connected to the distal end portion of the arm 7 via a connecting pin 12 (see FIG. 1), and is disposed below the arm-side holder portion 11a and a bucket. 10 and a bucket side holder portion 11b fixed to the upper end side portion. A plurality of damping members 18 are interposed between the arm side holder portion 11a and the bucket side holder portion 11b. The damping member 18 is made of, for example, vibration-proof rubber, and connects the arm-side holder portion 11a and the bucket-side holder portion 11b so as to be capable of damping. Thereby, vibration and noise during the rolling operation can be suppressed.

The rolling plate support mechanism 30B includes a hydraulic cylinder 31A capable of reciprocatingly driving the rolling plate 21 in the rolling direction, and two sets of parallel link mechanisms L for converting the operation stroke of the hydraulic cylinder 31A into an arc motion of the rolling plate 21. It has.
The hydraulic cylinder 31A is accommodated in the space portion S2, and is disposed so as to extend in the vertical direction along the front wall portion 10c. The hydraulic cylinder 31A has a metal bracket 17 in which a lower end side portion of the main body portion 31c is rotatably connected to the first pivotal support portion 21e, and a middle step portion of the main body portion 31c is fixed to the front wall portion 10c via a hard rubber. It is supported by. Two weight portions 23A having a predetermined weight are attached to the upper end of the piston rod 31d extending upward from the main body portion 31c.

The weight portion 23A is configured to be detachable with respect to the upper end portion of the piston rod 31d, and the weight portions 23A are formed so as to be connectable in a stacking manner.
A plurality of types of weight portions 23 having different weights are prepared in advance, and the number of connections is set according to a desired rolling force.
Accordingly, the rolling performance can be improved by changing the weight of the weight portion 23A and adjusting the rolling pressure.

Next, a modified example in which the embodiment is partially changed will be described.
1) In the above-described embodiment, an example has been described in which the rear portion of the bottom wall portion is formed in an upwardly inclined shape. However, the rear portion is formed in a horizontal shape in the same manner as the rolling plate (main rolling portion). May be.
Moreover, although the example in which the middle part of the bottom wall portion is formed to be inclined downward and backward has been described, it is sufficient that at least the space portion can be secured, and it is also possible to form it in a horizontal shape or a curved shape.

2] In the above embodiment, the example in which the rolling plate (main rolling portion) is disposed so as to face the bottom wall portion has been described. However, the rolling plate (main rolling portion) faces the front wall portion. You may arrange in. In this case, it is preferable to extend the auxiliary rolling part in the direction of the upper wall part.

3) In the above-described embodiment, the example in which the first pivotal support portion of the rolling plate is also used as the coupling portion of the locking portion of the auxiliary device has been described. However, a coupling portion for the locking portion is provided separately from the first pivotal support portion. Thus, the auxiliary device can be attached to the rolling plate in a state where the piston rod is connected to the first pivotal support portion. In this case, it is necessary to provide an opening in the vicinity of the newly established connecting portion.

4] In the above embodiment, an example in which two sets of parallel link mechanisms are provided has been described, but one set may be provided, or three or more sets may be provided. Moreover, although the example which comprised the parallel link mechanism by the front-back 1 pair parallel link member arrange | positioned forward and backward was demonstrated, you may comprise by three or more parallel link members.
5] In addition, those skilled in the art can implement the present invention with various modifications added without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 7 Arm 10 Bucket 10s Opening

edge part

11, 11A Holder part 18 Damping

member

20, 20A, 20B Bucket

type compacting device

21, 21A Rolling plate 21a Main rolling part 21b

Sub rolling part

22, 23,

23A Weight parts

30, 30A, 30B Rolling

plate support mechanisms

31, 31A

Hydraulic cylinders

31a,

31c Body parts

31b, 31d Piston rod 32 Parallel link member 41 Grasping frame 42 Hydraulic cylinder

Claims

A bucket for excavation work connected to the tip of the arm of the excavator, a rolling plate movably connected to the bucket, a rolling plate support mechanism for supporting the rolling plate movably with respect to the bucket, In a bucket-type rolling device provided with a hydraulic cylinder for reciprocatingly driving the rolling plate in the rolling direction,
The rolling plate support mechanism includes a parallel link mechanism having a plurality of parallel link members, one end of which is rotatably connected to the wall portion of the bucket and the other end of which is rotatably connected to the rolling plate.
A bucket-type compacting device characterized in that the compacting plate can be driven to reciprocate in a compacting direction perpendicular to the compacting plate and in a direction perpendicular to the compacting direction via the compacting plate support mechanism by the hydraulic cylinder. .
The bucket-type rolling device according to claim 1, wherein the hydraulic cylinder includes a reciprocating mechanism that reciprocates the piston rod in the vertical direction while supplying pressurized oil in one direction.
A gripping frame pivotally attached to the bucket and capable of opening and closing with respect to the opening edge of the bucket is provided,
The bucket-type compaction device according to claim 1, wherein excavation work can be performed by the bucket with the grip frame closed, and the grip frame can be opened and closed to enable gripping work.
A pair of gripping frame hydraulic cylinders for opening and closing the gripping frame;
4. The bucket-type rolling compactor according to claim 3, wherein the pair of gripping frame hydraulic cylinders are disposed on both sides of the hydraulic cylinder as viewed from a direction opposite to the bucket opening edge. 5.
A main rolling section for rolling the rolling plate in a horizontal state; and a sub rolling section formed integrally with the main rolling section and intersecting with the main rolling section. The bucket type rolling device according to claim 1, wherein a weight portion is provided at an upper end portion of the rolling portion.
The hydraulic cylinder includes a main body portion whose middle portion is supported by the bucket and a lower end portion connected to the rolling plate, and a piston rod which is disposed on the upper end portion of the main body portion and can reciprocate in the vertical direction. And
The bucket-type rolling compactor according to claim 1, wherein one or a plurality of detachable weight portions are disposed at an upper end portion of the piston rod.
The bucket is connected to the tip of the arm of the excavator via a holder part,
The holder part comprises an arm side holder part and a bucket side holder part closer to the bucket than the arm side holder part;
The bucket-type compaction device according to claim 1, further comprising a damping member between the arm-side holder portion and the bucket-side holder portion.