JP4374238B2 - Drilling device - Google Patents

Description

  The present invention relates to a drilling device for digging a vertical hole in the ground.

When performing local compost or planting under an orchard branch, it is necessary to dig a relatively large diameter vertical hole in the ground, and the conventional drilling device for digging such a vertical hole is a device frame. A lifting / lowering base is supported on the provided guide body so as to be movable up and down, a punching mechanism having a hydraulically driven drilling tool is provided on the lifting / lowering base, and a hydraulic cylinder for raising and lowering the lifting base is provided on the device frame (for example, patent Reference 1).
JP 10-309108 A

In the prior art, a hydraulic cylinder is provided in the upper part of the apparatus frame, and its cylinder rod is directly connected to the lifting platform. The stroke of the hydraulic cylinder is the lifting stroke of the drilling tool, which is greater than the vertical hole depth dimension. A hydraulic cylinder with a stroke must be prepared, the equipment frame must be long in the vertical direction, and the equipment becomes large, especially not suitable for work under orchard branches It has become.
It is an object of the present invention to provide an apparatus capable of solving such problems of the prior art.

  The present invention provides a drilling device in which the vertical length of the hydraulic cylinder and the device frame can be shortened and the device can be made compact by transmitting the expansion / contraction operation of the hydraulic cylinder to the lifting platform by doubling the stroke. The purpose is to do.

Specific means for solving the problems in the present invention are as follows.
First, a lifting body is supported on a guide body provided on the apparatus frame so as to be movable up and down, and a drilling mechanism having a hydraulically driven drilling tool is provided on the lifting table, and a lifting mechanism for raising and lowering the lifting table is provided on the apparatus frame. The lifting mechanism includes a hydraulic cylinder and double distance means for transmitting the expansion / contraction operation of the hydraulic cylinder to the lifting platform by doubling the stroke.
As a result, when the hydraulic cylinder is extended and retracted, the drilling tool can move up and down the lifting platform by a distance twice the stroke of the hydraulic cylinder, the vertical length of the hydraulic cylinder and the device frame can be set short, and the device can be configured compactly. .

Second, the double distance means includes a rotating body provided above and below a driving body connected to a hydraulic cylinder, a winding member is wound around the vertical rotating body, and the winding member is connected to an apparatus frame and a lifting platform. It is that.
This makes it possible to easily and inexpensively configure a mechanism that raises and lowers a distance twice as long as the stroke of the hydraulic cylinder.
Thirdly, the apparatus frame is provided with two guide bodies and a drilling tool in a triangular arrangement state, and a guide rod for guiding the raising and lowering of the drive body is arranged along the vertical direction in the vicinity of one guide body. It is that you are.

As a result, the drilling tool can be raised and lowered smoothly.
Fourthly, the device frame is attached to the rear part of the tractor via a two-point link mechanism.
This makes it easy to mount the device frame and adjust the position of the drilling tool relative to the tractor.

  According to the present invention, the expansion / contraction operation of the hydraulic cylinder can be transmitted to the lifting platform by doubling the stroke, the vertical length of the hydraulic cylinder and the apparatus frame can be shortened, and the apparatus can be configured compactly.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, a drilling device (hole digger) 1 is detachably attached to a rear portion of a tractor 3 via a two-point link mechanism 4, and a lifting platform 7 can be moved up and down on a guide body 6 provided on the device frame 5. The punching mechanism 8 having the hydraulically driven drilling tool 2 is provided on the lifting platform 7, and the lifting mechanism 9 for lifting the lifting platform 7 is provided on the apparatus frame 5.
The tractor 3 is configured by directly connecting an engine, a transmission case 31 and the like to constitute a vehicle body 32, a work device elevating hydraulic device 33 is mounted on the rear upper portion of the vehicle body 32, a driver seat 34 is disposed above the vehicle body 32, and the vehicle body 32. A driver's seat protection device 35 is attached to the rear part.

A link bracket 36 having a U metal fitting 36A at the rear end is fixed to the rear surface of the vehicle body 32, and a support pin 38 provided on a bracket 37 fixed to the front surface of the apparatus frame 5 is fitted into the U metal fitting 36A. It is secured with a retaining pin.
The bracket 37 of the device frame 5 is connected via a lift arm 33A and a lift rod 39 of the hydraulic device 33. By swinging the lift arm 33A, the drilling device 1 swings around the support pin 38, It is possible to adjust the angle with respect to the tractor 3 and change the posture so as to be perpendicular to the ground.

1 to 6, the apparatus frame 5 is formed by connecting two right and left columns 5a with upper and lower members 5b and 5c and an intermediate connecting member 5d, and the upper and lower members 5b and 5c are on the rear side (the punching mechanism 8 side). The left and right guide bodies 6 are supported on the left and right rear portions of the upper and lower members 5b and 5c.
The left and right guide bodies 6 are formed of two parallel bars, and upper and lower ends of the guide bodies 6 are fixed to the upper and lower members 5b and 5c, and a lifting platform 7 is fitted in the middle portion thereof. The elevator 7 is guided.

The lifting platform 7 is formed by fixing a pair of left and right cylindrical members 7c and a single bearing cylinder 7d between a pair of upper and lower plate members 7a and 7b. Fits up and down freely. The pair of left and right cylinder members 7c and one bearing cylinder 7d are triangularly arranged in plan view.
The lifting platform 7 is provided with a punching mechanism 8. The punching mechanism 8 includes a hydraulic motor 41 fixed to the lower surface of the upper plate member 7a, a transmission case 42 fixed to the upper surface of the upper plate member 7a, an output shaft 43 supported by the bearing cylinder 7d, and the output shaft 43 And a drilling tool 2 provided on the surface.

A transmission means 44 such as a gear transmission means or a chain transmission means is accommodated in the transmission case 42 so that the power of the hydraulic motor 41 is transmitted to the drilling tool 2 through the output shaft 43 at a constant speed or at a variable speed. It has become.
The elevating mechanism 9 has a hydraulic cylinder 10 mounted on the lower member 5c, and a double distance means 11 for transmitting the expansion / contraction operation of the hydraulic cylinder 10 to the elevating base 7 with a stroke doubled.
The double distance means 11 is provided with a rotating body 15 above and below a driving body 14 connected to a piston rod 10a of the hydraulic cylinder 10, and a winding member 16 is wound around the vertical rotating body 15 and the winding member 16 is wound around the apparatus frame 5. Are connected to the lifting platform 7.

A guide rod 17 is arranged in the vicinity of one of the two guide bodies 6 (left side in the tractor forward direction), and the guide rod 17 has upper and lower ends connected to and supported by the upper and lower members 5b and 5c. The drive body 14 is fitted in the middle part so as to be movable up and down, and guides the drive body 14 to move up and down.
The driving body 14 guided by the guide rod 17 can be moved up and down along the vertical direction of the guide body 6 by the expansion and contraction of the piston rod 10a of the hydraulic cylinder 10, and a pair of upper and lower rotating bodies (sprockets or rollers) 15 are arranged on the horizontal axis. A winding member 16 formed of a chain or the like is wound around the vertical rotating body 15.

The winding member 16 has an endless shape, and one part thereof is fixed to the column 5a of the mounting frame 5 via the bracket 45, and the other part is connected to the cylindrical member 7c of the lifting platform 7 via the bracket 46. When the driving body 14 is moved up and down, the distance relationship between the upper and lower rotating bodies 15 is unchanged, so that the endless shape of the winding member 16 is not changed, and only the connecting portion with the lifting platform 7 is in the vertical direction with respect to the mounting frame 5. To move on.
Therefore, when the hydraulic cylinder 10 is operated to move the driving body 14 up and down, the lifting platform 7 moves with respect to the driving body 14 by twice the moving distance of the driving body 14 with respect to the bracket 45. 7 lifts and lowers the distance twice the expansion / contraction stroke of the piston rod 10 a of the hydraulic cylinder 10.

Since the elevating mechanism 9 lowers the elevating platform 7 when lowering the drive body 14, when performing a drilling operation with the drilling tool 2, a pressing force can be applied in the direction of excavating the drilling tool 2, The fact that the expansion / contraction operation of the hydraulic cylinder 10 is transmitted to the lifting platform 7 by doubling the stroke can also double the lifting speed of the lifting platform 7, especially at light loads when the drilling tool 2 is extracted from the vertical hole after drilling. It is effective to raise the working efficiency.
The driving body 14 may be connected only to the piston rod 10a of the hydraulic cylinder 10. However, if the guide rod 17 is provided to guide the vertical movement, the vertical movement becomes smoother and the force for lowering the lifting platform 7 is stronger. Become.

1 to 9, the drilling tool 2 is detachably attached to the lower end of the output shaft 43 in which the core shaft 21 is supported by the bearing cylinder 7 d of the lifting platform 7. The core shaft 21 is formed of a solid rod or a hollow pipe material, and a tip conical member is attached to the lower end of the core shaft 21 to form a pointed portion 22. This pointed portion 22 prevents the drilling tool 2 from wobbling during excavation and improves the straightness of excavation.
The outer peripheral surface of the core shaft 21 is provided with a spiral portion 23 formed by spirally winding a strip between the pointed portion 22 and the base portion. An earth-removing member 26 is provided, which is mounted so as to protrude in the tangential direction at a position where the sheet material is displaced 180 degrees.

The earth shield member 26 protrudes radially outward from the spiral portion 23, and the lower edge is perpendicular to the axis of the core shaft 21, pushing the soil far away when drilled by the spiral portion 23, and around the upper end of the vertical hole The soil is removed from the vicinity of the vertical hole, the upper surface of the vertical hole is flattened, and the excavated soil is prevented from returning to the vertical hole.
A flat mounting portion 24 is provided between the pointed portion 22 and the spiral portion 23 of the core shaft 21. This attachment portion 24 is a portion in which a part of the disc in the circumferential direction (for example, a quarter circle) is cut out to form a cutout portion 24A, which is fixed to the outer peripheral surface of the lower end of the core shaft 21 by welding. A cutting blade 25 is detachably mounted on the upper surface.

Further, the end edge of the mounting portion 24 facing the notch portion 24A is bent toward the pointed end portion 22 side to form a receiving portion 24B inclined downward.
The cutting blade 25 is a flat portion 25B attached to the upper surface of the mounting portion 24, and a cutting blade that is bent downward from the flat portion 25B and protrudes downwardly from the cutout portion 24A toward the tip portion 22 side. 25A. The cutting edge of the cutting blade 25A is orthogonal to the core shaft 21, and excavates a vertical hole having a flat bottom surface.
The flat portion 25B of the cutting blade 25 is attached to the attachment portion 24 via a plurality of fasteners 48 such as bolts, and the back surface of the cutting blade 25A is in a state where the flat portion 25B is attached to the attachment portion 24. The attachment portion 24 is attached to the front surface of the receiving portion 24B, so that the cutting force received from the soil can be carried by the attachment portion 24, and the cutting blade 25 can be positioned with respect to the attachment portion 24.

The fastener 48 is screwed into the flat portion 25B of the cutting blade 25 from below the attachment portion 24, and its head protrudes below the attachment portion 24, but the receiving portion 24B and the cutting blade 25A are attached. Since it protrudes below from the lower surface of the part 24, it is prevented that it contacts with soil at the time of excavation.
The tip of the spiral portion 23 is fixed to the upper surface on the rear side of the cutting blade 25 of the mounting portion 24. The thickness of the spiral portion 23 is thinner than the cutting blade 25, and the soil excavated by the cutting blade 25 can smoothly transfer from the upper surface of the cutting blade 25 to the upper surface of the spiral portion 23.

The attachment portion 24 can be made of a material having a higher strength than the plate material forming the spiral portion 23, and is also reinforced by fixing the tip of the spiral portion 23. The surface other than the receiving portion 24B is a core shaft. 21 is a flat surface perpendicular to 21.
A hydraulic control valve 49 is provided on the back surface (surface on the tractor 3 side) of the device frame 5 by using an intermediate connecting member 5d, and pressure oil from the hydraulic pump of the tractor 3 is supplied to the hydraulic cylinder 10 and The hydraulic motor 41 can be supplied, and the operation lever 50 of the hydraulic control valve 49 can be operated by the operator from above the tractor 3 or on the ground.

In FIG. 6, 51 is a net cover that covers the outer periphery of the drilling tool 2, and is detachably attached to the apparatus frame 5.
For example, when excavating a vertical hole for local composting under an orchard branch using the drilling device 1 configured in this way, the drilling device 1 is moved to the target branch under the tractor 3 and the position The two-point link mechanism 4 is operated to adjust the angle so that the drilling device 1 is substantially perpendicular to the ground.
By operating the hydraulic control valve 49 to drive the hydraulic motor 41 of the drilling mechanism 8, the hydraulic cylinder 10 of the elevating mechanism 9 is contracted, lowered while rotating the drilling tool 2, and the tip 22 is thrust into the ground. Drilling with the cutting blade 25.

The cutting blade 25 scrapes off the soil while the cutting blade 25A receives a backup by the receiving portion 24B of the mounting portion 24, lifts the shaved soil from the cutout portion 24A to the upper surface of the cutting blade 25, and sends it upward by the spiral portion 23 that follows. To go.
When the driving body 14 is lowered by contraction of the piston rod 10a of the hydraulic cylinder 10, the drilling tool 2 is pulled down by a distance twice as long as the downward stroke, and a vertical hole having a required depth is formed on the ground. The bottom of this vertical hole has a flat shape.
When the vertical hole is about to be completed, the earth removal member 26 descends to the vicinity of the upper surface of the vertical hole, and not only the soil lifted by the spiral portion 23 but also the soil on the ground surface near the upper surface of the vertical hole is removed away from the vertical hole. The nearby ground surface is formed flat.

When the vertical hole is completed, the hydraulic cylinder 10 is extended while stopping the rotation of the drilling tool 2 or reversely rotating, and the drilling tool 2 is raised at twice the speed of the extending operation. Then, compost is inserted into the completed vertical hole.
According to the drilling device 1, since the tractor 3 is mounted with the two-point link mechanism 4, the reaction force due to the excavation of the drilling tool 2 can be received by the tractor 3, and a straight vertical hole can be easily drilled. And the ground clearance can be easily secured. Further, since the drilling tool 2 is hydraulically driven, it is possible to absorb an impact with a stone or the like as compared with the case of driving with the PTO power.

In the present invention, the shape of each member and the positional relationship between the front, back, left, right, and top in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the drilling device 1 may be mounted on the tractor 3 via a three-point link mechanism so that the vertical position can be adjusted, and the device frame 5 can be grounded. The guide body 6 and the guide rod 17 may be formed of channel steel, and the cylindrical member 7c and the drive body 14 may be formed so as to be slidable in the channel of the channel steel. Also good.

  Alternatively, two spiral portions 23 may be formed, two cutout portions 24A may be formed in the attachment portion 24, and two cutting blades 25 may be provided. The attachment portion 24 is formed of a substantially semicircular plate material. Or you may.

It is a whole side view of the tractor wearing state showing an embodiment of the invention. It is a left view of a drilling apparatus. It is a right view of a drilling apparatus. It is a front view of a drilling apparatus. It is a rear view of a drilling apparatus. It is a top view of a drilling apparatus. It is the perspective view which looked at the front-end | tip of a drilling tool from the notch part side. It is the perspective view which looked at the front-end | tip of a drilling tool from the cutting blade side. It is the perspective view which looked at the front-end | tip of a drilling tool from the spiral part side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drilling device 2 Drilling tool 3 Tractor 4 Two-point link mechanism 5 Apparatus frame 6 Guide body 7 Lifting base 8 Punching mechanism 9 Lifting mechanism 10 Hydraulic cylinder 11 Double distance means 14 Drive body 15 Rotating body 16 Winding member 17 Guide rod 21 Core Shaft 22 Pointed portion 23 Spiral portion 24 Mounting portion 24A Notch portion 25 Cutting blade 25A Cutting blade 26 Earthbreak member 27 Drive means

Claims (3)

A lifting body is supported on a guide body provided on the apparatus frame so as to be movable up and down, a drilling mechanism having a hydraulically driven drilling tool is provided on the lifting table, and a lifting mechanism for raising and lowering the lifting platform is provided on the apparatus frame. the lifting mechanism is then closed and the hydraulic cylinder, and a fold distance means for transmitting the expanding and contracting operations of the hydraulic cylinder to the lifting platform and the stroke is doubled,
The double-distance means is provided with a rotating body above and below a driving body connected to a hydraulic cylinder, and an endless winding member is wound around the vertical rotating body, and one end of the endless winding member is connected to the apparatus frame. And the other one place is connected to the lifting platform, and the lifting platform can be moved up and down by the vertical movement of the driving body . The device frame is attached to the rear of the tractor via a two-point link mechanism, and a hydraulic control valve for supplying pressure oil to the hydraulic cylinder and the drilling tool is provided on the device frame, and an operation lever of the hydraulic control valve is provided from above the tractor. Or it can be operated from the ground , The drilling apparatus of Claim 1 characterized by the above-mentioned.   The apparatus frame is provided with two guide bodies and a drilling tool in a triangular arrangement state, and a guide rod for guiding the raising and lowering of the driving body is arranged in the vertical direction in the vicinity of one guide body. The drilling device according to claim 2.

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