JP5311077B2 - Drilling machine for planting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punching machine for fix planting punching on a prescribed position a fix planting hole of a size optimum for fix planting a seedling to be transplanted, easily collecting a mulch sheet pulling piece, and allowing an effective performance of punching work. <P>SOLUTION: This punching machine 1 for fix planting includes a frame 10, a wheel 20, a pair of ground rings 21a and 21b attached to both the right and left sides of the circumferential part of the wheel, and a plurality of punching cutters 30a, 30b, 30c and 30d attached to the circumference of the wheel. The frame 10 includes a wheel attachment part 11 made by forming a metallic plate in L shape, a metallic pole 12 vertically attached to the wheel attachment part 11, and a handle 13 horizontally attached to the end of the metallic pole 12. The wheel 20 is attached to the wheel attachment part 11, and the punching cutters 30a, 30b, 30c and 30d are attached at an equal interval in four places to the circumference of the wheel 20 so as to make a triangle blade of the end project from within a pair of the ground rings toward the external direction. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to drilling during planting work of vegetables, flower buds, etc., and more specifically, when planting potted vegetables or flower seedlings, it is used for planting in a multi-sheet installed in a field or a vinyl sheet. The present invention relates to a planting drill that efficiently drills holes.

  Conventionally, the number of the seedlings to be transplanted in the planting work is the same as the number of seedlings to be transplanted, and one planting hole has been manually drilled, which has been a heavy labor. In recent years, in a field or a vinyl sheet, a multi-sheet is generally installed in order to moisturize seedlings to be planted, maintain soil temperature, prevent weeds, etc., and make a hole at a planting position. Installing a multi-sheet from a planted seedling requires a hole in the position of the seedling, which is a difficult task, so install a multi-sheet on the ground beforehand, and make a hole in the multi-sheet and the ground at the same time. The method of planting has been taken. This drilling operation uses a drilling tool and manually drills holes one by one, but the temperature in the greenhouse is high, and the drilling workability deteriorates due to the expansion of the multi-sheet due to the temperature, etc. In addition to being restricted by the working time, it takes a lot of time to collect the multi-sheet punched pieces after the work, and the drying of the fixed planting holes due to the delay of the working time has adversely affected the planting seedlings.

In view of this, a “planting machine for seedling planting” has been proposed in which a plurality of circularly drilled bodies with pointed tips are arranged side by side on the lower surface side of a rod-shaped substrate and pressed against the ground from above (specialty planting drilling machine). Kaihei 11-318119). However, with this “planting machine for seedling planting”, it is necessary to hold the operation handle attached to the base by hand, press it manually against the ground of the field to make a hole, and move to the next position one after another. It was difficult to carry out continuous work, took a lot of work time, and forced heavy labor.
In order to improve such a problem, there is a “planting hole drilling machine” in which a wheel that rotates in contact with the ground is provided on the frame of the planting hole drilling machine, and a plurality of drilling rods are provided on the outer periphery of the wheel to constitute a drilling device. It has been proposed (Japanese Patent Laid-Open No. 2000-316396). However, with this “planting hole drilling machine”, the hole made by the drilling rod provided on the outer periphery of the wheel cannot be adjusted freely according to the type of vegetable, and can only be adapted to certain vegetables. In some cases, there were holes larger or smaller than those suitable for seedlings to be planted on the sheet, and the work was sometimes interrupted. In addition, the planted seedlings have a problem that the heat retention is lowered and weeds grow.

In general, the farmers who grow in the greenhouse are growing vegetables on the scale of several dozens, so the multi-sheets are tens of sheets and the number of holes for planting is tens of thousands. Yes, as mentioned above, drilling work by manpower requires harsh labor, so for the aging farmers, the problem of having to realize light labor in the planting process and efficient work that can be done in a short time is It has not been resolved yet.
Therefore, the inventor of the present application has solved the above-mentioned conventional problems, opened a fixed planting hole of a size optimal for the planting of a seedling to be transplanted at a predetermined position, and removed a multi-sheet obtained by drilling a hole in a multi-sheet. For easy planting with simple structure and easy handling, the piece can be collected and drilling can be done efficiently, and the size, arrangement and spacing of the planting holes can be adjusted freely. A drilling machine was developed and a patent application (Japanese Patent Application No. 2009-230984) was filed. By using this planting hole drilling machine, we were able to increase the work efficiency at a stretch, but depending on the soil condition and unevenness of the ground, there was a problem that the hole drilling left behind and the drilling rate was low Has occurred.

JP 11-318119 A JP 2000-316396 A Japanese Patent Application No. 2009-230984

  The present invention further improves the "planting hole drilling machine" according to the patent application (Japanese Patent Application No. 2009-230984) filed by the present inventor, and more reliably transplants seedlings to be transplanted with respect to the ground and multi-sheet conditions. Provided is a permanent planting hole drilling machine that can make a fixed planting hole of an optimal size at a predetermined position, and can easily collect a multi-sheet punched piece made by drilling a hole in a multi-sheet, and can efficiently perform a drilling operation. It is for the purpose.

In order to achieve the above object, a planting hole drill according to claim 1 of the present invention is provided with a multi-sheet installed in a field or a vinyl sheet and holes for seedling planting at a predetermined interval on the ground below the multi-sheet. A drilling tool for planting with a plurality of drilling cutters for mounting a wheel rotatably on a frame of a planting drilling machine, and contacting the ground or a multi-seat on the ground on both the left and right sides of the outer periphery of the wheel For this purpose, a pair of grounding rings having a diameter slightly larger than the diameter of the wheel is provided, and the outer peripheral portion of the wheel has a cylindrical shape formed by an annular triangular blade having a plurality of triangular blade tips continuously formed in an annular shape. mounting a plurality of drilling cutter at a predetermined interval, and, to characterized in that attached to protrude outward annular triangular blade tip of the drilling cutters from between the pair of ground ring .

  The planting hole drilling machine according to the present invention is configured as described above, and when placed on a field or a multi-seat, when the frame is held by hand and the wheel is moved while rotating, it is placed on both the left and right sides of the outer periphery of the wheel. The pair of grounding rings provided are firmly pressed in the direction of the ground by the weight of the wheel, and the multi-seat is firmly held regardless of the hardness, density and unevenness of the soil beneath the multi-seat. The triangular blade at the tip of the drilling cutter attached to the outer periphery penetrates the multi-sheet and pierces the ground, and when the triangular blade of the drilling cutter breaks through the multi-sheet, the multi-sheet does not slip or tear, and the multi-sheet is round Drill holes and earth holes. Even when multi-seats are not laid in the field, the left and right grounding rings on the outer periphery of the wheel firmly grasp the ground and rotate the wheel stably. Then, the hole punching cutter comes out of the ground according to the rotation of the wheel, and a plurality of hole punching cutters have the effect of sequentially drilling seedling planting holes (fixed planting holes) at predetermined intervals along with the rotation of the wheel. .

According to a second aspect of the present invention, there is provided a planting hole drilling machine according to the first aspect, wherein a shaft hole is provided in a base portion of the hole punching cutter, and a base portion of the hole punching cutter is pivoted on an outer peripheral portion of the wheel. A plurality of shaft holes to be attached are provided, and either the shaft hole of the drilling cutter base or the shaft hole of the wheel outer peripheral part is formed in a horizontally long hole, and the shaft hole and the shaft hole of the wheel outer peripheral part are inserted into the base of the drilling cutter. The hole cutter is slidably attached to the wheel through the pin, and the hole cutter is fitted to the outer periphery of the wheel so that the base of the hole cutter is fitted and fixed when the hole cutter slides most toward the center of the wheel. When the drilling cutter slides most outward in the wheel, the drilling cutter moves back and forth with the insertion pin inserted into the shaft hole of the base as the pivot point. Swing becomes freely, and is characterized in that the formation of the width of the recess in the outer peripheral portion of the wheel so as to limit the swinging angle of the drilling cutter back and forth within 45 degrees, respectively.

The planting hole drilling machine of the present invention is configured in this manner, so that the hole punching cutter slides in the outer direction and the rotation direction of the wheel due to the centrifugal force due to the rotation of the wheel, and the gravity of the hole punching cutter also causes gravity. Slid in the direction of the ground, and can be swung back and forth within 45 degrees with the insertion pin attached to the outer periphery of the wheel as a pivot point. The ring-shaped cutting edge pierces the multi-sheet and is pushed down at a right angle to the ground, so that the hole can be drilled reliably. The remaining soil has the effect of being released to the outside by centrifugal force.

In addition, the planting hole drill according to claim 3 of the present invention is the planting hole drill according to claim 1 or 2, wherein a plurality of triangular blade edges at the tip of the drilling cutter are continuously formed in an annular shape. the cutting edge of the annular triangular blade, when rotated moves forward direction puts the wheels on the ground or multi sheet, a cutting edge located in the moving direction (forward direction), than the cutting edge located behind direction It is formed by protruding .
The planting hole drilling machine according to the present invention is configured in this way, so that the hole cutter is in contact with the blade edge and the surface of the multi-sheet in a substantially parallel state immediately before the blade edge hits the multi-sheet. The weight of the wheel is almost uniformly added to the whole, and the multi-sheet can be pierced with a uniform force to form a clean round hole.

According to the invention of claim 1, when placed on a field or a multi-seat and moved while holding the frame by hand and rotating the wheel, a pair of grounding rings provided on the left and right sides of the outer periphery of the wheel The punch of the drilling cutter attached to the outer periphery of the wheel is firmly pressed in the direction of the ground by the weight of the wheel, regardless of the hardness, density, or unevenness of the soil beneath the multi-sheet. The tip of the triangular triangle blade penetrates the multi-sheet and pierces the ground, and when the circular triangle blade of the drilling cutter breaks through the multi-sheet, the multi-sheet does not slip or tear, and the multi-sheet is punched with round holes and earth holes. . Even when multi-seats are not laid in the field, the left and right grounding rings on the outer periphery of the wheel firmly grasp the ground and rotate the wheel stably. In this way, a plurality of drilling cutters can sequentially drill seedling planting holes (fixed planting holes) on the ground at predetermined intervals as the wheels rotate.

According to the invention of claim 2, the hole punching cutter slides in the outer direction and the rotation direction of the wheel by centrifugal force due to the rotation of the wheel, and also slides in the ground direction by gravity due to the weight of the hole punching cutter, With the insertion pin attached to the outer periphery of the wheel as an axis fulcrum, it can swing back and forth within 45 degrees , and as the wheel rotates, the edge of the drilling cutter is almost parallel to the surface of the multi-sheet The ring edge cuts through the multi-sheet and is pushed down at right angles to the ground, so that the hole can be drilled reliably. To be released.

  According to the invention of claim 3, the hole cutter is in contact with the blade edge and the surface of the multi-sheet in a substantially parallel state immediately before the blade edge hits the multi-sheet, and the weight of the wheel is substantially uniform over the entire annular blade edge. In addition, it is possible to pierce the multi-sheet with a uniform force and make a clean round hole.

It is a perspective view which shows the whole structure of the hole punch for planting. It is explanatory drawing (AC) which shows the structure of a punching cutter. It is explanatory drawing (AC) which shows the attachment state of the drilling cutter to a wheel. It is explanatory drawing which shows the use condition of the hole punch for planting. It is explanatory drawing (AC) which shows the action | operation of a drilling cutter.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the entire structure of a planting hole drill of the present invention. The planting hole drill 1 includes a frame 10, wheels 20, a pair of grounding rings 21 (21a, 21b) attached to the left and right sides of the outer periphery of the wheel, and a plurality of hole cutters 30 attached to the outer periphery of the wheel. (30a, 30b, 30c, 30d).
The frame 10 is composed of a wheel mounting portion 11 in which a metal plate is formed in an L shape, a metal column 12 that is vertically mounted on the wheel mounting portion 11, and a handle 13 that is horizontally mounted on the tip of the metal column 12. . Rubber caps 14 and 14 are attached to both ends of the handle 13. A wheel 20 is rotatably attached to the wheel attachment portion 11, and drilling cutters 30 a, 30 b, 30 c, and 30 d are attached to the outer periphery of the wheel 20 at four equal intervals.

FIG. 2 is an explanatory view showing the structure of the punching cutter, FIG. 2A is an outline view of the punching cutter 30 as viewed from the side, and FIG. 2B is a diagram of the punching cutter 30 as seen from the line aa ′ in FIG. FIG. 2C is a developed view of the blade of the annular triangular blade 31. FIG. The drilling cutter 30 is attached to the wheel 20 by the insertion pin 22 so as to be slidable and swingable. (See FIGS. 1 and 3) Therefore, a blade of the annular triangular blade 31 is attached to the tip of the punching cutter 30 in a cylindrical shape. Further, a U-shaped attachment portion 33 is formed at the rear end portion of the base portion 32 of the punching cutter 30 so as to sandwich the wheel 20, and the attachment portion 33 is slidably attached to the wheel 20. A laterally long hole (shaft hole 34) is provided. The annular triangular blade 31 of the drilling cutter 30 is formed by continuously forming a plurality of triangular blade edges on a stainless spring steel blade, and the blade edge at the center of the blade is long (in FIG. 2C, from the bottom of the blade to the blade edge). The height of the blades at the left and right portions of the blade is slightly shorter than the length of the blade at the center (the height from the bottom of the blade to the blade is low in FIG. 2C) . By forming the blade tip in this manner, when the blade of the annular triangular blade 31 is attached to the base portion 32 in a cylindrical shape, the tip of the drilling cutter 30 is positioned at the end of the annular triangular blade 31 as shown in FIG. The cutting edge is formed in an annularly continuous state from a long part to a short part. Although not shown, the blade is rounded so as to maintain a cylindrical shape, both ends thereof are welded, and screw holes are provided so as to be screwed to the base 32.
Further, as shown in FIG. 2B, the arrowhead-shaped arrowhead pin 35 has an arrowhead-like tip at the substantially center position of the cylindrical drilling cutter 30 so that the arrowhead-shaped tip does not protrude outward from the cutting edge of the annular triangular blade 31. It is fixed inside the base 33.

The drilling cutters 30 (30a, 30b, 30c, 30d) are attached to four locations on the outer peripheral portion of the wheel 20, as shown in FIGS. FIG. 3 is an explanatory view (AC) showing the mounting state of the drilling cutter to the wheel 20, and shows the state (30d) in which the drilling cutter 30 is located at the upper part of the wheel 20 in FIGS. Yes. 3A to 3C, the shaft hole 34 of the U-shaped attachment portion 33 at the base of the punching cutter 30 is slidably attached to the wheel 20 by the insertion pin 22. 3A shows a state in which the punching cutter 30 is slid in the center direction of the wheel 20 (downward in the drawing), and FIG. 3B shows a state in which the punching cutter 30 is slid in the outer direction of the wheel 20 (upward in the drawing). The insertion pin 22 has four shaft holes for attaching the drilling cutters 30 (30a, 30b, 30c, 30d) to the outer peripheral portion of the wheel 20, and each of the drilling cutters (30a, 30b, 30c, 30d). The shaft hole 34 in the base part and the shaft hole in the outer peripheral part of the wheel are passed through and attached so as not to be removed by screwing.
In this embodiment, the shaft hole in the outer peripheral portion of the wheel is formed in a round hole through which the insertion pin 22 penetrates, and the shaft hole 34 in the drilling cutter base is formed in a horizontally long hole so that the insertion pin 22 is penetrated and attached. Although the cutter 30 is slidably attached to the wheel 20, the drilling cutter 30 is mounted on the wheel 20 even if the shaft hole 34 of the drilling cutter base is formed into a round hole and the shaft hole on the outer periphery of the wheel is formed into a horizontally long hole. It can be slidably mounted on.
FIG. 3C shows a state in which the punching cutter 30 slides in the outer direction of the wheel 20 (upward in the figure) and swings about 45 degrees in the front-rear direction (left-right direction in the figure) with the insertion pin 22 as an axis fulcrum.
A fitting recess 23 into which the base 32 of the drilling cutter is fitted is formed on the outer peripheral portion of the wheel 20 in a portion where the drilling cutter 30 is attached. As shown in FIG. 3C, the drilling cutter 30 inserts the insertion pin 22. When swinging back and forth as a pivot point, the U-shaped mounting portion 33 of the punching cutter base hits the fitting recess 23 on the outer periphery of the wheel, and the swing angle is limited to 90 degrees at the maximum (within 45 degrees forward and backward respectively). Thus, the width of the fitting recess 23 on the outer peripheral portion of the wheel is formed.
The reason why the rocking angle of the drilling cutter 30 is limited to a maximum of 90 degrees (within 45 degrees each in the front and rear) is that the inventor of the present application is various in order to increase the drilling rate for multi-sheets and soil by the planting drill of the present invention. The result of experiment and optimization.

In the above embodiment, the example in which the hole cutters 30a, 30b, 30c, and 30d are attached to the outer periphery of the wheel 20 at equal intervals is shown. In order to be able to select the diameter of the wheel and to adjust the number of the perforated cutters 30 attached to the outer periphery thereof, it is possible to provide a large number of attachment locations where the perforated cutters 30 are attached by the insertion pins 22.
The drilling cutter 30 can be exchanged with various sizes depending on the size of the seedling to be planted by detachably attaching the insertion pin 22 to the wheel 20 by screwing or the like.

Hereinafter, the usage method of the planting hole drill of this invention and the action | operation of the hole punching cutter 30 at the time of use are demonstrated.
FIG. 4 is an explanatory view of the use state of the planting hole drill of the present invention as seen from the side. When using the drilling machine for planting of the present invention, an operator stands in a field or a greenhouse, grasps the caps 14 and 14 of the handle 13 of the drilling machine 1 for planting with both hands, and holds the wheel on the soil in the field. (If it is in a field where a multi-seat is laid, place it on the multi-seat) and if you walk to push forward (the direction of travel in the figure), the wheels will rotate counterclockwise and The triangular blade breaks through the multi-sheet 40 by the weight of the wheel 20 and digs into the soil 50 to make holes for planting (a multi-sheet punching hole 41 and a soil hole 51). The operator simply pushes the planting hole drill 1 forward, the wheel 20 rotates, and the hole cutter 30 moves along with the multi-sheet 40 and the field soil 50 at regular intervals. The punching hole 41 and the earth hole 51) can be opened. At this time, a pair of grounding rings 21 (21a, 21b) attached to the left and right sides of the outer peripheral portion of the wheel 20 are firmly pressed toward the ground by the weight of the wheel 20, and the ground 50 below the multi-seat 40 is Regardless of the hardness, density, and unevenness of the soil, when the blade of the punching cutter 30 breaks through the multi-sheet 40, the multi-sheet does not shift or tear, and the multi-sheet is rounded according to the annular cutting edge shape of the punching cutter 30. A punching hole 41 can be formed.

FIG. 4 shows a state in which the punching cutter 30 (30b) is just under the wheel 20, pierced the multi-sheet 40 by the weight of the wheel 20 and bites into the soil 50, and the multi-sheet is punched in front of the punching cutter 30b. The drilling cutter 30c having 41 and the earth hole 51 is shown in a state where it slides in the outer direction of the wheel and swings in the rotational direction by the centrifugal force caused by the counterclockwise rotation of the wheel 20. At this time, the soil remaining inside the annular blade of the punching cutter 30c is discharged to the outside by centrifugal force, but the cut piece 42 of the multi-sheet punching hole 41 remaining inside the blade penetrates the arrowhead pin 35. To remain inside the cutting edge.
In FIG. 4, the punching cutter 30 d located at the upper part of the wheel 20 shows a state of sliding toward the center of the wheel, but this is the case when the wheel 20 is stationary or when the operator's traveling speed is slow. When the traveling speed during the work is equal to or higher than a certain level, the punching cutter 30d slides and swings in the outer direction of the wheel by the centrifugal force generated by the rotation of the wheel 20.
The drilling cutter 30a slides in the outer direction of the wheel by the centrifugal force generated by the rotation of the wheel 20, and the cutting edge is directed toward the ground by the weight of the drilling cutter 30a.

5A to 5C are explanatory views showing the operation of the punching cutter of the planting drilling machine according to the present invention, and are enlarged views of the periphery when the wheel 20 and the punching cutter 30 are in contact with the multi-sheet 40 and the ground 50.
FIG. 5A shows a state immediately before the punching cutter 30 a in FIG. 4 bites into the multi-sheet 40 and the soil 50 with the forward rotation of the wheel 20. The state immediately before the annular triangular blade at the tip of the punching cutter 30 hits the multi-sheet 40 and breaks through the annular sheet is shown. At this time, the hole punching cutter 30 slides in the ground direction by its own weight, and the blade edge faces the ground direction, and immediately before the blade edge hits the multi-sheet, the blade edge and the surface of the multi-sheet become substantially parallel. Then, the weight of the wheel 20 is added to the drilling cutter 30a, and the annular cutting edge breaks through the multi-sheet and is pushed down at right angles to the ground to dig the earth hole 51 (FIG. 5B).
FIG. 5C shows a state where the wheel 20 is rotated and separated from the multi-sheet 40 and the ground 50 after the drilling cutter 30 a has opened the earth hole 51. At this time, the punching cutter 30a slides in the outer direction of the wheel and swings in the rotating direction by the centrifugal force generated by the rotation of the wheel. The maximum swing angle of the hole punching cutter 30a at this time is 90 degrees (within 45 degrees in the front and rear directions) . By this swinging, the soil remaining inside the annular blade of the punching cutter 30a is discharged to the outside by centrifugal force, but the multi-sheet punching piece 42 remaining inside the blade is penetrated by the arrowhead pin 35. It remains inside the blade edge. And the punching cutter 30d is close to the multi-sheet 40 and the ground 50, and immediately before the next punching hole 41 and the earth hole 51 are made.
Thus, when the wheel 20 rotates forward, the punching cutters 30 (30a, 30b, 30c, 30d) sequentially open the punch holes 41 and the earth holes 51 in the multi-sheet and the ground at regular intervals. Can do.

  In the typical embodiment of the planting hole drill of the present invention described above, the wheel 20 has a diameter of about 30 cm, the grounding width of the pair of left and right grounding rings 21 (21a, 21b) is about 10 mm, and the grounding on the left and right sides. The distance between the rings is about 12 cm, and the diameter of the cylindrical triangular blade of the drilling cutter 30 (30a, 30b, 30c, 30d) is about 50 mm (however, various sizes are prepared according to the size of the fixed hole) The planting drilling machine weighs about 6kg and is suitable for people to work. In addition, when this multi-sheet drilling machine is used to drill a multi-sheet, it is possible to drill about 80m at a stretch. By removing the multi-sheet punching piece 42 taken into the inside of the drilling cutter, further drilling is performed. Work can be continued. When drilling using this planting hole drilling machine, the work efficiency is much higher than the conventional multi-sheet, where the drilling position is marked and the holes are drilled one by one, and the work time is about 10 minutes. It could be shortened to 1. In addition, since the hole punching was performed by pressing the multi-sheets from both sides with the grounding rings on the left and right sides of the wheel, the multi-sheets could achieve a drilling rate of 90% or more. However, for the soil under the multi-sheet, if the soil is hard or pebbles are mixed, the drilling cutter will not be able to enter the soil sufficiently and will be affected by the depth of the hole. There is.

As explained above, according to the planting hole drill of the present invention, by simply pushing the wheel to roll forward, it is possible to continuously and reliably drill holes for planting at a predetermined interval. It is extremely effective in shortening work hours and reducing labor in farm work.
In addition, since the drilling cutter is attached so as to be easily replaceable by screwing or the like, drilling cutters of a size suitable for fixed planting holes of various sizes can be prepared and used. Since the triangular blade of the drilling cutter is also attached to the base by screwing, it can be easily replaced due to damage or sharpening of the blade edge.
Further, in the above-described embodiment, the planting hole drill has a single wheel, but it is also possible to attach an axle to the frame 10 and attach a plurality of wheels thereto. If it does in this way, it will become possible to open a plurality of fixed planting holes simultaneously.
Further, the planting hole drill of the present invention is simple in structure, can be reduced in weight, and can be manufactured at low cost.

DESCRIPTION OF SYMBOLS 1 ... Planting hole drill 10 ... Frame 11 ... Wheel attachment part 12 ... Metal pillar 13 ... Handle 14 ... Cap 20 ... Wheel 21 ... Grounding ring (21a, 21b)
22 ... insertion pin 23 ... fitting recess 30 ... drilling cutter (30a, 30b, 30c, 30d)
31 ... Annular triangular blade 32 ... Base 33 ... U-shaped attachment 34 ... Shaft hole 35 ... Arrowhead pin 40 ... Multi-sheet 41 ... Multi-sheet punching hole 42- ..Multi-sheet extraction piece 50 ... Soil 51 ... Deep hole

Claims (3)

A multi-sheet installed in a field or a vinyl sheet, and a planting drilling tool provided with a plurality of drilling cutters for setting a hole for seedling planting at a predetermined interval on the ground below,
A wheel can be freely mounted on the frame of a hole planter for planting,
On the left and right sides of the outer periphery of the wheel, a pair of grounding rings having a diameter slightly larger than the diameter of the wheel for contacting the ground or the multi-seat on the ground are provided.
At the outer periphery of this wheel, a plurality of cylindrical drilling cutters, each of which has an annular triangular blade formed by continuously forming a plurality of triangular cutting edges in a ring shape, are attached at predetermined intervals, and the tip of the drilling cutter A fixed hole drilling machine, wherein the annular triangular blade is attached so as to protrude outwardly from between the pair of grounding rings. A shaft hole is provided at the base of the drilling cutter, a plurality of shaft holes are provided on the outer periphery of the wheel, and a shaft hole of the drilling cutter base or a wheel hole of the outer periphery of the wheel is provided. Formed in a horizontally long hole, through the shaft hole at the base of the hole punching cutter and the shaft hole on the wheel outer peripheral part, the hole punching cutter is slidably attached to the wheel,
And, when the drilling cutter slides most in the center direction of the wheel, the outer periphery of the wheel is provided with a recess that fits into the base of the drilling cutter so that the base of the drilling cutter is fitted and fixed,
When the drilling cutter slides most outward in the direction of the wheel, the drilling cutter can swing back and forth with the insertion pin inserted through the shaft hole in the base as a pivot, and the swinging angle of the drilling cutter can be set back and forth. 2. The planting hole drill according to claim 1, wherein the width of the concave portion of the outer peripheral portion of the wheel is formed so as to be limited within 45 degrees . An annular triangular blade formed by continuously forming a plurality of triangular cutting edges at the tip of the drilling cutter in an annular shape,
When the wheel is placed on the ground or the multi-seat and rotated and moved forward, the cutting edge located on the moving direction side (forward direction side) is projected from the cutting edge located on the rear direction side. The hole making machine for planting according to claim 1 or 2.

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