JP2000228921A - Hole digging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate problems that a larger hole than that is necessary must be formed and much labor is required for digging operations to reduce the operating efficiency when digging the ground surface with a backhoe device and dug soil remaining in the interior of the hole cannot be discharged to the outside when digging is carried out with a hand type auger though the ground surface is dug with the backhoe device of a turning operation vehicle equipped with a bucket or the hand type auger to form a hole for transplantation when conventionally transplanting a garden tree, etc., subjected to pot cultivation. SOLUTION: This hole digging machine is obtained by additionally installing a depth gauge 26 capable of regulating the digging depth and adjusting the digging depth in an auger attachment 17 attached to a turning operation vehicle and capable digging the ground surface by rotating and driving, composing the auger attachment 17 so that the rotational speed of the auger 21 thereof can be changed and further additionally installing a point formed into a nearly conical shape to be tapered at the tip center of the auger 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction of an auger attachment mounted on a hydraulic working device such as a backhoe device of a turning work vehicle and excavating the ground by being driven to rotate.

[0002]

2. Description of the Related Art Conventionally, when transplanting a plant or the like that has been subjected to pot cultivation for growing seedlings in a substantially cylindrical container or the like having a closed bottom, a turning work vehicle equipped with a bucket as a work attachment has been used. The ground was excavated with a backhoe device or a hand-held auger to form a hole for transplantation, and a plant or the like was transplanted into the hole for transplantation. Since many plants are often transplanted at a time when transplanting potted plants or the like in this way, it is necessary to excavate many transplant holes for transplanting.

[0003]

However, as described above,
When excavating a transplant hole for transplanting a tree plant or the like with a backhoe device equipped with a bucket, a hole having an area larger than necessary must be formed to secure a required depth, which makes it difficult to perform excavation work. In addition to this, the stability of planting trees at the time of transplantation was poor and the work efficiency at the time of transplantation was reduced. Also, when a hole for transplantation is excavated by a hand-held auger, the excavated soil remains inside the hole because the rotation speed of the auger is low and constant, and the soil cannot be discharged to the outside. However, the hole excavated by the auger was buried by the remaining soil, and the hole for transplantation could not be formed in an intended shape. Furthermore, when excavating a large number of transplant holes at once, it is difficult to excavate the transplant holes at the same depth regardless of whether the excavation is performed by the backhoe device or the auger. Since the depths were different, it was difficult to unify the height and posture of the plant after transplanting.

[0004]

The present invention uses the following means in order to solve the above problems. That is, in claim 1, an attachment to be attached to a hydraulic work vehicle with an arm, the auger attachment driven by a hydraulic motor at the tip of the arm is suspended and mounted via a cross joint.

According to a second aspect of the present invention, there is provided an auger attachment mounted on a turning work vehicle for excavating work, wherein the auger of the auger attachment is configured to be capable of changing its rotation speed, and the auger of the auger is changed according to the working state. It was configured to control the rotation speed.

According to a third aspect of the present invention, there is provided an auger attachment mounted on a turning work vehicle for excavating work, wherein an arm protrudes from an auger mounting base of the auger attachment, and the excavation depth is regulated by the arm. A depth gauge is provided for adjusting the excavation depth. According to a fourth aspect of the present invention, a point formed in a tapered substantially conical shape is provided at the center of the tip of the auger.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The problems and means to be solved by the present invention are as described above. Next, an embodiment of the present invention shown in the accompanying drawings will be described. FIG. 1 is an overall side view showing a state where the auger attachment of the present invention is mounted on a backhoe device of a turning work vehicle, FIG. 2 is a side view showing an auger attachment, and FIG. 3 is a state where a transplantation hole is excavated by the auger attachment. FIG.

First, the overall configuration of a hydraulic working vehicle equipped with the auger attachment of the present invention will be described. In FIG. 1, a hydraulic work vehicle is used as a backhoe, and a swing table bearing 4 is disposed at the upper center of the crawler traveling device 1. The swing table bearing 4 supports the swing body 2 so that the swing body 2 can swing left and right. For example, at the front end of the crawler traveling device 1,
The blade 3 is disposed so as to be vertically rotatable.

Above the revolving superstructure 2, a bonnet 5 containing an engine and the like and a driver's seat 6 are arranged. Above the driver's seat 6, a canopy 7 is provided. A lower end of a boom 15 is pivotally supported on a boom bracket 8 attached to a front end of the revolving unit 2 so as to be rotatable left and right. An arm 16 is pivotally supported at the tip of the boom 15 so as to be vertically rotatable. An auger attachment 17 is suspended from the tip of the arm 16 via a cross joint 11 as a working attachment. These booms 1
5, a backhoe device 12 as a working device of a turning work vehicle by means of an arm 16, an auger attachment 17, and the like.
Is configured.

A boom cylinder 18 is interposed between the boom bracket 8 and the boom 15, an arm cylinder 19 is interposed between the boom 15 and the arm 16, and a base of the attachment cylinder 20 is mounted on the arm 16. End 20
a is attached. Attachment cylinder 2
Numeral 0 indicates that when a bucket is attached as a work attachment to the distal end of the arm 16, the bucket is rotated by expanding and contracting. The boom cylinder 18, the arm cylinder 19, and the attachment cylinder 20 are configured as hydraulic cylinders that are driven to expand and contract by hydraulic pressure. Then, the boom 15 is vertically turned by the expansion and contraction of the boom cylinder 18, and the arm 1 is moved.
6 is vertically rotated by the expansion and contraction of the arm cylinder 19, and the auger attachment 17 is driven using pressure oil for expanding and contracting the attachment cylinder 20.

The auger attachment 17 includes an auger 21 for digging a hole for transplanting a potted plant or the like, a substantially conical point 22 projecting downward from a lower end of the auger 21, and rotating the auger 21. A hydraulic motor 25 to be driven, a coupling 23 for transmitting the driving force from the hydraulic motor 25 to the auger 21, and the like. The auger attachment 17 has a depth for regulating and adjusting the excavation depth. A gauge 26 is provided. The turning work vehicle can also perform a standard backhoe operation by removing the auger attachment 17 from the arm 16 and attaching a bucket to the backhoe device 12 as a work attachment.

Next, the auger attachment 17 will be described. In FIG. 2, the hydraulic motor 25 is driven by pressure oil originally supplied from a turning work vehicle to extend and contract the attachment cylinder 20, and supplies the pressure oil to the attachment cylinder 20 or the hydraulic motor 25 to the hydraulic motor 25. The supply can be switched on the turning work vehicle side, and is supplied to the hydraulic motor 25 when the auger attachment 17 is mounted. The auger 21 is attached to the hydraulic motor 25 downward through the coupling 23.
The auger 21 is driven to rotate by a hydraulic motor 25, and the rotation / stop of the auger 21 is switched by operating the work implement operating lever 9 (bucket operating lever). From the lower end of the auger 21, a point 22 formed in a substantially conical shape that tapers downwardly protrudes.

An arm 35 projects from the mounting base of the auger attachment 17.
An arm 35 is fixed between the armature and the coupling 23, and a depth gauge 26 is attached to the arm 35 and is arranged on the side of the auger 21. Depth gauge 2
Reference numeral 6 denotes an adjusting shaft 26a fixed to the arm 35, a movable pipe 26b slidably fitted to the adjusting shaft 26a, and a plate-like member stopper 26c fixed to the lower end of the movable pipe 26b. It is composed of

A plurality of adjusting holes 32 are formed at substantially constant intervals from the upper end to the lower end of the adjusting shaft 26a.
A fixed hole 31 is formed at an upper end portion of the movable pipe 26b, and the position of the fixed hole 31 of the movable pipe 26b and one of the adjustment holes 32 of the adjustment shaft 26a are aligned with each other. By inserting the fixing pin 33, the adjustment shaft 2
The position of the movable pipe 26b with respect to 6a is fixed. By adjusting the position of the adjustment hole 32 for inserting the fixing pin 33 in alignment with the position of the fixing hole 31, the arm 3
The height H from 5 to the lower surface of the stopper 26c is adjusted. By adjusting the height H, the length of the auger 21 protruding downward from the lower surface of the stopper 26c is changed.
The depth of the transplantation hole to be excavated is adjusted in multiple steps. However, the configuration for adjusting the height H is not limited to the above configuration, and may be configured to adjust steplessly using a screw shaft, a cylinder, or the like.

In the case of excavating a transplanting hole using the auger attachment 17 configured as described above, first, as shown in FIG. 3, the auger 21 is removed from the lower surface of the stopper 26c by the depth D of the transplanting hole to be dug. After the height H ′ from the arm 35 to the lower surface of the stopper 26c is adjusted so that the auger 21 projects downward, the auger 21 is rotationally driven by the hydraulic motor 25 in a state where the auger attachment 17 does not touch the ground.

When the boom 15 or the arm 16 of the backhoe device 12 is rotated downward at the point where the transplantation hole is to be excavated and the auger attachment 17 is moved downward, the point 22 enters the ground, and thereafter, Auger 21
Excavation is carried out. In this case, the excavation point of the auger 21 is fixed by the point 22 pierced into the ground,
It is possible to prevent the formation location of the transplantation hole from shifting, and to form the transplantation hole at an accurate location.

Thereafter, when the excavation by the auger 21 is continued and the implantation hole is excavated to the hole depth D, the stopper 2
Since the lower surface of 6c is in contact with the ground and the auger 21 cannot descend further, excavation by the auger 21 is performed only up to the hole depth D. That is, the excavation depth is regulated by the depth gauge 26.

The hole depth D is determined by the auger attachment 17.
When the excavation is performed up to, the rotation speed of the auger 21 is increased. The increase in the rotation speed of the auger 21 may be caused by, for example, the pressure oil for the attachment cylinder 20 and the P
This is performed by supplying hydraulic oil to the hydraulic motor 25 for rotating the TO shaft. Also, this auger 21
The rotation speed can be increased automatically by detecting that the lower surface of the stopper 26c has contacted the ground, or can be manually switched.

In the case of excavating a transplanting hole using the auger 21, the auger 21 is rotated at a low speed by increasing the torque of the hydraulic motor 25 in order to perform reliable excavation. After the excavation, the excavated soil remains in the transplantation hole, but since the rotation speed of the auger 21 at the time of excavation is slow, the soil is removed more than the speed at which the soil remaining in the transplantation hole is pumped upward by the auger 21. The speed of falling by gravity is faster, and the soil in the transplant hole cannot be discharged. Therefore, after the excavation, the rotation speed of the auger 21 is increased as described above, and the rotation speed is controlled so that the speed of pumping the soil by the auger 21 is higher than the speed of falling the soil. The auger 21 draws the water upward and discharges it to the outside. However, a conical guide plate may be provided below the coupling 23 so that the pumped soil is diffused outward.

As described above, the rotation speed of the auger 21 is controlled in accordance with the working conditions such as when excavating and when discharging soil. Then, by raising the rotation speed of the auger 21 after the excavation and discharging the soil remaining in the transplantation hole to the outside, the finished shape of the transplantation hole can be formed as it is with the hole shape excavated by the auger 21, This makes it possible to form the implantation hole in a desired shape.

The depth of the implantation hole formed by the auger attachment 17 is regulated to the hole depth D by the depth gauge 26. Therefore, when a plurality of implantation holes are formed by the auger attachment 17, These implant holes are all formed to a certain depth. Further, since the depth gauge 26 is configured so that the excavation depth can be changed, the implantation hole can be formed at an arbitrary depth.

Further, since the diameter of the transplantation hole excavated by the auger 21 is formed to be substantially the same as the outer diameter of the auger 21, the hole can be formed without forming a hole having an unnecessarily large area. The depth can be ensured, the planting stability at the time of transplanting is good, and the working efficiency can be improved. The auger 21 of the auger attachment 17 has an outer diameter
Since it is configured so that it can be replaced with one having a different length, it is possible to form a transplanting hole according to the size of the plant to be transplanted.

Further, the backhoe device 12 of the turning work vehicle
By mounting the auger attachment 17 on a working device such as the one described above, when forming a plurality of transplantation holes, only by rotating the backhoe device 12, the transplantation holes of the correct size and depth are formed at the correct points. Can be formed, and the working efficiency can be improved. The hole formed by the auger attachment 17 is not limited to a hole for transplanting a plant or the like, but may be a hole for erecting a pile or a telephone pole.

[0024]

According to the present invention, the following effects can be obtained by the configuration described above. That is, as described in claim 1, an attachment to be attached to a hydraulic working vehicle with an arm, wherein an auger attachment driven by a hydraulic motor is suspended and attached to a tip of the arm via a cross joint, so that a plurality of transplantation holes are provided. When forming a hole, instead of excavating work with a bucket such as a backhoe device, simply replace the attachment, rotate the auger and make a plurality of transplant holes etc. of the correct size and depth at the correct point. Thus, the working efficiency can be improved.

According to a second aspect of the present invention, there is provided an auger attachment mounted on a turning work vehicle for excavating work, wherein the rotation speed of the auger of the auger attachment is changeable, and the auger of the auger is changed according to the working state. By configuring to control the rotation speed, excavation is excavated at low speed and high torque at the beginning of digging, and when digging to a predetermined depth, the number of rotations is increased and soil remaining inside the formed transplantation hole etc. It is possible to easily discharge to the outside and form a finished shape such as a transplanting hole as it is with the hole shape excavated by the auger, and it is possible to form the transplanting hole into a desired shape.

According to a third aspect of the present invention, there is provided an auger attachment mounted on a turning work vehicle for excavating work, wherein an arm protrudes from an auger mounting base of the auger attachment, and the excavation depth is regulated by the arm. Since a depth gauge that can adjust the excavation depth is attached, when excavation is performed with the auger attachment and a plurality of transplant holes are formed, all of the transplant holes should be formed at a constant depth. This makes it possible to easily unify the height and posture of a plant after transplanting. Further, since the excavation depth can be adjusted by the depth gauge, it is possible to excavate a transplantation hole or the like to an arbitrary depth.

According to the fourth aspect of the present invention, a point formed in a tapered substantially conical shape is provided at the center of the tip of the auger, so that the auger can be located at an accurate point, and can have an accurate size and depth. It is possible to easily form a plurality of holes for transplantation and the like, and to improve the working efficiency.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a state in which an auger attachment of the present invention is mounted on a backhoe device of a turning work vehicle.

FIG. 2 is a side view showing an auger attachment.

FIG. 3 is a diagram showing a state where a transplantation hole is excavated by an auger attachment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crawler type traveling device 2 Revolving superstructure 12 Backhoe device 17 Auger attachment 21 Auger 22 Point 25 Hydraulic motor 26 Depth gauge

Claims (4)

[Claims] 1. An excavator which is attached to a hydraulic working vehicle with an arm, wherein an auger attachment driven by a hydraulic motor is suspended from a tip of the arm via a cross joint. 2. An auger attachment to be mounted on a turning vehicle for excavation work, wherein the auger rotation speed of the auger attachment is changeable, and the auger rotation speed is controlled in accordance with a working state. A digging machine. 3. An auger attachment mounted on a turning work vehicle for excavation work, wherein an arm protrudes from an auger mounting base of the auger attachment, and the excavation depth can be regulated by adjusting the excavation depth to the arm. A digging machine equipped with a depth gauge. 4. The excavator according to claim 1, wherein a point formed in a substantially conical shape that tapers is attached to the center of the tip of the auger.