JPH09209676A - Drilling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the posture of a drilling member charged on a mast so as to turn to the perpendicular direction of the gravity even on an inclined ground. SOLUTION: This working vehicle is equipped with traveling devices 15, 17 and a motor 3 driving a hydraulic pump and provided with an extensible mast 33 at the front side of the machine body and the mast is equipped with a drilling member 50. The mast 33 is rotatably supported at the front part of the machine body. A hydraulic cylinder is arranged between the middle of the mast and the machine body 1 to widely tilt the mast from the vertical position to the position inclined to the forward or backward direction. In this way, the posture of the drilling machine 50 equipped on the mast 33 can be controlled so as to turn the perpendicular direction of the gravity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging work vehicle operated by an operator while walking, and in particular, even on a sloping ground, the mast is largely tilted forward or backward, and the digging member mounted on the mast is gravitated. The posture can be controlled in the direction directly below where

[0002]

2. Description of the Related Art Conventionally, to apply a fertilizer to the roots of an orchard tree in an orchard, sows compost or chemical fertilizer directly around the tree,
A hole is dug around the tree and manure or fertilizer is buried in the hole to make the tree fertilizer. This work usually involves manually digging holes around the tree with a scoop or hoe and burying compost or fertilizer in the holes.

In recent years, it has been practiced to dig a hole around a tree with a digging work vehicle and embed compost or fertilizer into the hole. In a conventional digging work vehicle 100 ', as shown in FIG. 7, a mast 35 is erected in a vertical posture in a front part of a movable body 1', and a digging member 50 attached to the mast 35 is grounded. It is a process of digging the inside of the orchard to carry out the digging work of trees in the orchard and utility poles at the road construction site.

[0004]

By the way, the above-mentioned digging work vehicle has a mast 35 which is erected in a vertical posture on the front part of the machine body.
The digging member 50 attached to the digging member advances the digging work, and the digging is performed in the direction orthogonal to the road surface. Therefore, when digging the hole 60 for feeding fertilizer around the tree T of the orchard planted on the slope E, the direction of the hole 60 is digging in the direction orthogonal to the slope E. In particular, when digging the lower side of the tree T on the slope E, the root 70 of the tree T is often cut. Therefore, the tree T
There is a problem that it slows down the momentum and adversely affects the yield of fruit trees. In addition, it is indispensable that the digging for erection of piles and utility poles on the sloped ground should be directed in the direction of droop in the direction of gravity, but this is not applicable either.

In view of the above problems, it is an object of the present invention to provide a digging work vehicle capable of controlling the attitude of a digging member mounted on a mast in a direction directly below where gravity acts even on a sloping ground.

[0006]

In order to achieve the above-mentioned object, a digging work vehicle according to claim 1 of the present invention is equipped with a prime mover for driving a traveling device and a hydraulic pump, and a front part of the machine is provided. Is a digging work vehicle equipped with a mast that extends upward, and the mast is equipped with a digging member, the mast being rotatably supported on the front part of the body, and between the middle part of the mast and the body. A hydraulic cylinder was installed, and the mast can be tilted greatly from the vertical position to the forward tilted position and the rearward tilted position by the hydraulic cylinder, and the attitude of the digging member mounted on the mast can be controlled in the direction directly below where gravity acts. It is characterized by that.

According to the first aspect of the present invention, in the digging work vehicle operated by the worker while walking, the mast can be largely tilted from the vertical position to the forward tilted position and the backward tilted position, and the hole provided on the mast. Since the posture of the digging member can be controlled in the direction directly below where gravity acts, the digging member can be directed to the direction directly below where gravity acts even on sloping ground, including when digging the ground in a horizontal state. Work can be performed easily.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a digging work vehicle of the present invention, and FIGS. 2 and 3 are a front view and a side view. 4 and 5 are side views showing the operation of the digging work vehicle of the present invention. FIG. 6 is a plan view of the digging work.

The overall structure of the digging work vehicle 100 of the present invention will be described. 1 to 4, first, there is a body 1,
The machine body 1 is equipped with a prime mover 3 and a hydraulic pump 5 driven by the prime mover 3. Further, at the rear of the machine body 1, a handle 7 and various levers 9 to
15 are provided. A pair of crawlers 17 and 19 are arranged as left and right sides of the machine body 1 as a traveling device, and a front wheel 23 and a rear wheel 25 are rotatably attached to the frame 21. An intermediate wheel 27 is rotatably mounted between the two 23, 25, and the front wheel 23 and the rear wheel 25 are connected to the endless belt 2.
9,29 are wound. The machine body 1 is self-supported by the crawlers 17 and 19 and has a function as a traveling device.

The pair of crawlers 17 and 19 are provided with an output shaft 31 connected to the prime mover 3 through a proper speed reducing mechanism (not shown) such as a gear so as to project to the left and right sides, and the front wheel 23 is attached to the output shaft 31. Has been. A clutch mechanism (not shown) is provided between the prime mover 3 and the output shaft 31 so that the pair of crawlers 17 and 19 can be independently driven to rotate by switching the operation levers 9 to 15. Has become. Of course, instead of the crawlers 17 and 19, a four-wheeled vehicle using four normal wheels may be used.

A digging member 50 is attached to the front of the machine body 1. First, the frame 1A protruding to the front part of the machine body 1 is supported by the machine body 1 at the front positions of the pair of crawlers 17 and 19 with the inside thereof as a fulcrum O. Two parallel masts 33 having a rectangular shape (cross section U-shape) are established on the frame 1A, and the upper ends thereof are connected by the frame 33A to form a frame structure. The both masts 33 slidably support two parallel elevating masts 35 having the same mold section, and each upper end has a frame structure in which upper ends are connected by a frame 35A. In the two lifting masts 35, a rod 37 of a long-stroke lifting cylinder C1 having a lower end 36 pivotally supported at the center of the frame 1A is provided at the upper end of the frame 35A.
It is connected to. As a result, the double-acting lifting cylinder C
By the expansion and contraction action of 1, the elevating mast 35 is moved up and down between a state in which it extends to the rising end in FIGS. 1, 2 and 3 and a state in which it contracts to the lower limit position shown by the solid line in FIG.

A double-acting hydraulic cylinder C2 for forward and backward tilting is interposed between the two masts 33 and the machine body 1. The detailed configuration is, as shown in FIGS. 1, 2, and 3, a member 33B which is entangled with the middle part of the mast 33.
The hydraulic cylinder C2 is erected between the body 1 located above the fulcrum O and at the rear position by pivotally supporting the support shafts P1 and P2. In the tilt hydraulic cylinder C2, the mast 33 is set to the forward tilt position when the rod 41 is extended, and the mast 33 can be tilted largely to the rear tilt position when the rod 41 is contracted. The tilt angle θ from the vertical position of the mast 33 to the forward tilt position and the backward tilt position is set to a range of 20 to 30 degrees.

Next, the digging member 50 attached to the lifting mast 35 will be described. The lifting mast 35 is attached to the screw body 53 via upper and lower attachments 43 and 45.
The digging member 50 is attached. The screw body 53 is rotatably supported by the upper and lower bearing members 47, 47, and is driven in the forward and reverse directions by the hydraulic motor OM at the top. Then, the vertical position and the rearward position from the vertical position with respect to the ground E are performed by changing the postures of the mast 33 and the lifting mast 35 by adjusting the expansion and contraction amount of the hydraulic cylinder C2. Further, the digging depth D is set between the state in which the elevating mast 35 extends to the rising end in FIGS. 1 and 2 and the state in which the elevating mast 35 contracts to the lower limit position shown in FIG. 4 due to the expansion and contraction action of the double-acting elevating cylinder C1. Adjusted between.

The lifting cylinder C1 of the mast 33 is
Each of the hydraulic cylinders C2 for tilting the mast 33 is a double-acting cylinder, and is connected to the hydraulic pump 5 serving as a drive source thereof via the respective hoses H1 and H2. Therefore, while the prime mover 3 is activated and the hydraulic pump 5 is operated, the respective functions can be exhibited by the levers 12 and 14 operated by the operator. Each cylinder C
The details of the connecting hoses H1 and H2 for connecting the hydraulic pumps 1 and C2 to the hydraulic pump 5 are omitted.

The operation will be described based on the above configuration. First, to excavate the slope E in the vertical direction which is the direction of gravity, the prime mover 3 is activated and the hydraulic pump 5 is activated. And various levers 9 operated by the operator
-15, as shown by the solid line in FIG. 5, the mast 33 and the digging member 50 with respect to the sloped ground E inclined by the inclination angle θ.
In order to stand the screw body 53 in the vertical direction which is the direction of gravity, the mast 33 is largely tilted by the tilt angle θ to the forward tilt position where it is in the vertical posture by the extension action of the rod 41 of the hydraulic cylinder C2. At this time, the digging member 50 is vertically raised to the uppermost position. In this state, the digging work vehicle 100 is moved forward to position the screw body 53, which is the digging member 50, under the tree T so as to approach it. Next, the hydraulic motor OM is driven to rotate the screw body 53,
The lifting mast 35 is contracted by the hydraulic cylinder C1,
Under the upright vertical posture, descend to dig a hole.

As shown in FIG.
Since the holes 60 can be dug in the direction of gravity as shown in FIG. 6, a predetermined number of holes can be dug without cutting the root 70 of the tree T. After filling compost or chemical fertilizer into this hole, it is backfilled. When digging the hole 60 on the upper side of the tree T with respect to the slope E, as shown by the two-dot chain line in FIG. 5, the digging work vehicle 1
It is also possible to use a method in which 00 is made to face the tree T from the upper side of the slope E and the posture of the digging member 50 is controlled to the rearwardly inclined position to face the direction of gravity.

According to the above embodiment, the following effects can be obtained. The mast can be largely tilted from the vertical position to the front tilt position and the rear tilt position by the hydraulic cylinder, and the posture of the digging member mounted on the mast can be easily controlled in the direction directly below where gravity acts. In addition to digging the ground in the horizontal state, the digging member is directed to the direction directly below where gravity acts even on a sloped ground, and the digging work in the direction directly below where gravity acts can be easily performed.

It is needless to say that the present invention is not limited to the above-described embodiment, and design changes can be made within the scope of the invention. For example, the elevating mechanism of the digging member 50 may be provided with an elevating unit such as a hydraulic cylinder in the mast 33 instead of the elevating mast 35, and thus the digging member 50 may be moved up and down. Further, it can be used not only for digging holes around trees such as orchards, but also for making vertical holes when erecting piles and electric poles. In addition, various attachments can be prepared and exchanged to be used for various tasks. Further, a folding step 80 can be provided at the rear part of the digging work vehicle 100, and the step 80 can be taken in a horizontal posture as shown by a two-dot chain line.

[0019]

As described above, according to the first aspect of the present invention, the mast can be largely tilted from the vertical position to the forward tilt position and the rear tilt position by the hydraulic cylinder, and the hole excavating member mounted on the mast is directly under gravity. Since the posture can be easily controlled in any direction, the digging member can be directed directly below where gravity acts even on sloping ground, including when digging the ground in a horizontal state, and digging work can be performed easily below where gravity acts. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a perspective view of a digging work vehicle.

FIG. 2 is a view showing an embodiment of the present invention and is a front view of a digging work vehicle.

FIG. 3 is a side view of a digging work vehicle showing an embodiment of the present invention.

FIG. 4 is a side view of the digging work vehicle showing the embodiment of the present invention.

FIG. 5 is a side view of the working state of the digging work vehicle showing the embodiment of the present invention.

FIG. 6 is a view showing an embodiment of the present invention and is a plan view of a digging work.

FIG. 7 is a side view of a working state of a conventional digging work vehicle.

[Explanation of symbols]

 1 Airframe 1A Frame 3 Motor 5 Hydraulic pump 9-15 Operating lever 17,19 Crawler 33 Mast 33A Frame 35 Lifting mast 35A Frame 50 Drilling member 53 Screw body 60 Hole 70 Root C1 Lifting cylinder C2 Hydraulic cylinder E Sloping land OM Hydraulic motor T Tree θ Tilt angle 100 Hole digging vehicle

Claims (1)

[Claims] 1. A digging work vehicle in which a machine is equipped with a prime mover for driving a traveling device and a hydraulic pump, a mast extending upward is provided at a front portion of the machine, and a digging member is provided on the mast. , The mast is rotatably supported on the front part of the machine body, and a hydraulic cylinder is installed between the middle part of the mast and the machine body, and the mast is enlarged from the vertical position to the forward tilt position and the rear tilt position by the hydraulic cylinder. A digging work vehicle, which is tiltable and is capable of controlling the posture of a digging member mounted on the mast in a direction directly below where gravity acts.