JP3167840U - Weeding blade - Google Patents

Abstract

An object of the present invention is to provide a weeding blade attached to a brush cutter that can simultaneously perform a normal mowing work and an earth raising work for digging up grass. A rotary cutting blade mounted on the tip of a brush cutter, wherein at least three or more blade bodies each having a blade portion at a leading edge in a rotation direction are arranged radially equiangularly from a rotary base, and the blade An angle of inclination is provided so as to rise from the front edge to the rear edge of the part, and the blade is formed so as to draw a gentle parabolic curve to the rear edge as it moves away from the rotation center axis of the blade part. And means for forming the inclination angle of the blade portion in the range of 5 to 10 degrees, the inclined surface forming the blade edge angle of the blade portion is formed downward, and the direction of the blade edge angle is the length of the blade body At the tip end of one third to one fourth, a means is provided in which the rebound angle is set in the upward direction in the range of 1 to 5 degrees. [Selection] Figure 1

Description

  The present invention relates to a weeding blade mounted on a brush cutter that can simultaneously perform a normal mowing operation and an uplifting operation for digging up grass.

  2. Description of the Related Art Conventionally, mowing work such as grass growing on a bank in a field or in a forested field is performed by attaching a rotary blade to a brush cutter and rotating the rotary blade. As the rotary blade mounted on the brush cutter, a disk-shaped blade is the mainstream, and a nylon rope-shaped blade, a two-blade blade, and the like are used. When we cut grass with these conventional blades, we can cut grass stems that grow from the ground, but we can't dig and cut roots in the ground, so grass grows over time. Therefore, mowing work is required repeatedly over a period of time, and the labor burden for daily farming work is large.

  In recent years, various techniques have been proposed to solve the above problems. For example, a cylindrical piece made of a mower or weeding groove is provided at the center of the rotating table of the mower or brush cutter body, depending on the purpose of eradication of grass and its roots, making a ditch, or raising soil. (See Patent Document 1) has been proposed and is a known technique.

  However, the above-mentioned “cylindrical piece made of mowing machine weeding groove” (see Patent Document 1) has a small diameter cylindrical piece attached to the rotary shaft of the mowing machine, so pinpoint grass and its root eradication, Although it is effective for work such as making a ditch or raising soil, the work efficiency is extremely poor as a mower for working to cut grass over a wide area.

  In addition, a “weeding device” (see Patent Document 2) in which a metal chain that rotates in a free state at its tip is provided on the lower side of a rotary table of a mower or brush cutter main body has been proposed as a publicly known technique.

  However, the above-mentioned ““ Weeding device ”(see Patent Document 2) is effective in removing grass with shallow roots near the ground surface by a metal chain that rotates with the tip portion free on the lower side of the rotating disk. There was a problem with the weeding effect of the grass with roots deep in the ground.

  Further, a “working machine with a grass cutting blade and a grass cutting blade” in which a plurality of bending portions are intermittently provided on the grass drawing main body and the bending angle between the grass drawing main body and the bending portion is an acute angle (Patent Document 3). Reference) Proposed and known technology.

  However, since the above-mentioned “working machine with grass cutting blade and grass cutting blade” (see Patent Document 3) has a disk-shaped blade, there is no escape of earth and sand dug up in the grass drawing operation. In addition, since the cutting blade bites into the ground surface at a substantially right angle, it requires labor to perform the weeding work in the lateral direction, so that the mowing work cannot be performed efficiently.

  As described above, the rotary cutting blade attached to the tip of the conventional brush cutter cannot efficiently perform the earth raising work for digging up the grass simultaneously with the normal mowing work.

  In view of the current state of the rotary cutting blade as described above, the present applicant has further researched and improved the “Weeding Blade” (see Patent Document 4) that the applicant previously possessed a patent right. The weeding blade is a rotary cutting blade attached to the tip of the brush cutter, and at least three or more blade bodies provided with a blade portion at the front edge in the rotation direction are arranged at an equal angle on the rotating base and are radial. And a blade portion formed so as to draw a gentle parabolic curve from the front edge of the blade portion toward the rear edge, and as a distance from the rotating base to the rear edge increases. Forms an inclination angle in the range of 5 to 10 degrees, and further, the inclined surface of the blade edge angle of the blade portion is formed downward, and the direction of the blade edge angle is warped in the upward direction in the range of 1 to 5 degrees. By creating a return angle, it raises the earth by uprooting the grass at the same time as normal mowing. Work to develop weeding blade can be carried out efficiently, but leading to proposal of "weeding blade" in the present application.

Utility Model Registration No. 3155717 Utility Model Registration No. 3144196 Japanese Patent Laid-Open No. 2005-341837 Japanese Patent Laid-Open No. 2006-17

In view of the above problems, the present invention aims to provide a weeding blade attached to a brush cutter that can simultaneously perform a normal mowing operation and an uplifting operation for digging up grass.

  The weeding blade of the present invention is a rotary cutting blade attached to the tip of a brush cutter, and at least three or more blade bodies having a blade portion at the front edge in the rotational direction are arranged radially at equal angles from the rotating base. The blade portion is formed so as to be inclined upwardly from the front edge toward the rear edge, and so as to draw a gentle parabolic curve to the rear edge as it moves away from the rotating base. The means in which the inclination angle of the part is formed in the range of 5 to 10 degrees is adopted.

  Further, in the weeding blade of the present invention, the inclined surface forming the blade edge angle of the blade portion is formed downward, and the direction of the blade edge angle is one third to four quarters of the length of the blade body. At one tip portion, a means is adopted in which a rebound angle is provided in an upward direction within a range of 1 to 5 degrees.

  According to the weeding blade of the present invention, there is an excellent effect that it is possible to simultaneously perform a normal mowing work and an earth raising work for digging up grass.

  In addition, according to the weeding blade of the present invention, because the blade portion is appropriately cut into the ground by raising the inclination angle from the front edge of the blade portion toward the rear edge, the grass is uprooted, The state that the weeding work has been completed can be seen at a glance, and the cut grass and the roots of the crushed grass are mixed in the soil as they are to become fertilizer, and the excellent effect of maintaining the mowing effect of the ground surface for a long period of time is achieved.

  Further, according to the weeding blade of the present invention, an inclination angle is provided in a rising shape from the front edge to the rear edge of the blade portion, and a gentle parabolic curve is formed to the rear edge as the distance from the rotating base increases. Since it is shaped like a sword as drawn, it reduces the cutting blade resistance of the grass, so that it has an excellent effect of digging up even a tall grass.

  Further, according to the weeding blade of the present invention, the inclination angle of the blade portion of the blade body is formed in the range of 5 to 10 degrees, and the rebound angle is warped in the range of 1 to 5 degrees in the upward direction. By reducing the resistance of the cutting blade between the grass to be mowed and the soil to be earthed, it is possible to improve the efficiency of the weeding operation.

  Further, according to the weeding blade of the present invention, the inclined surface forming the blade edge angle of the blade portion is formed downward and the rebound angle can be warped in the range of 1 to 5 degrees in the upward direction. It has an excellent effect of preventing accidents where the cutting edge bites into the soil more than necessary.

  Moreover, according to the weeding blade of the present invention, since it can be attached to a conventional mower alone via an attachment, the rotating blade can be exchanged on the spot according to the extent of the grass. There is an effect.

It is a whole perspective view which shows the weeding blade of this invention. It is explanatory drawing which shows the weeding blade of this invention. It is an enlarged side view which shows the inclination | tilt angle and cutting-edge angle of the weeding blade of this invention. It is an enlarged side view which shows the rebound angle of the weeding blade of this invention. It is explanatory drawing which shows the state of the weeding operation | work using the weeding blade of this invention. It is a field photograph which shows the state immediately after the weeding work using the weeding blade of this invention. It is a field photograph which shows the state which passed 11 days after the weeding operation | work using the weeding blade of this invention. It is an enlarged field photograph which shows the state immediately after the weeding work using the weeding blade of this invention. It is an enlarged field photograph which shows the state 11 days after the weeding work using the weeding blade of this invention.

  The weeding blade 1 of the present invention is a rotary cutting blade mounted on the tip of the brush cutter K, and at least three or more blade bodies 10 each having a blade portion 11 at the front edge in the rotational direction are radially provided from the rotary base 17. Are arranged at equal angles to each other, and an inclined angle α is provided so as to rise from the front edge to the rear edge of the blade portion 11, and a gentle parabolic curve is formed to the rear edge as the distance from the rotary base 17 increases. A means for forming the blade portion 11 so that the inclination angle α of the blade portion 11 is formed in a range of 5 to 10 degrees, and an inclined surface 15 forming the blade edge angle θ of the blade portion 11 are formed downward, The direction of the blade edge angle θ is provided with the rebound angle β in the upward direction in the range of 1 to 5 degrees at the tip portion 16 of one third to one fourth of the length of the blade body 10. The most characteristic feature is the use of the means, and the embodiments will be described below with reference to the drawings.

  The shape of the weeding blade 1 of the present invention is not particularly limited to the embodiments described below, and can be arbitrarily changed without departing from the technical idea of the present invention.

  FIG. 1 is an overall perspective view showing a weeding blade 1 of the present invention. FIG. 1A shows an overall perspective view as seen from the upper front side, and FIG. 1B shows an overall perspective view as seen from the lower back side. The weeding blade 1 is a rotary cutting blade mounted on the rotary shaft 16 at the tip of the brush cutter K, and at least three or more blade bodies 10 each having a blade portion 11 on the front edge 13 in the rotational direction are equiangular. Arranged and formed radially from the rotating base 17. The shape of the blade body 10 is, for example, a sword shape having a length of 15 cm, a width of about 7 cm, and a thickness of 2 mm. The material is, for example, hard stainless steel, carbon steel such as S43C, It is conceivable that martensitic stainless steel is obtained in a desired degree of hardness and hardness by heat treatment such as quenching. Since the blade body 10 is basically a flat plate, it is effective in terms of cost to cut it efficiently from a standard steel plate using a laser machine or the like and form it by welding with the rotating body 17, but forging stainless steel. It is also effective in terms of strength to integrally form by. The blade 11 is sharpened and molded. Further, it is desirable that the rotary shaft hole 18 provided at the center of the rotary base 17 can be attached to various types of brush cutters K via an adapter.

  FIG. 2 is an explanatory view showing the weeding blade 1 of the present invention. FIG. 2A is a plan view, and FIG. 2B is a side view of the A view. The blade body 10 is provided radially by disposing at least three or more blade bodies 10 each having the blade portion 11 on the front edge 13 in the rotation direction at an equal angle from the rotating base body 17. The blades 10 are arranged radially at three or more equiangular angles, so that the cut grass G can be easily removed and the mowing operation is facilitated, and the soil D is also raised by uplifting the grass G. Efficiently discharged.

  The blade portion 11 is provided with an inclination angle α formed in a range of 5 to 10 degrees so as to rise from the front edge 13 toward the rear edge 14, and is gradually increased to the rear edge 14 as the distance from the rotating base 17 increases. It is formed to draw a parabolic curve. That is, since the cutting edge 11 is warped in the shape of a sword, the cutting edge 12 cuts at an acute angle with respect to the cross section of the grass G, so that the sharpness is increased and the load on the cutting edge 12 is reduced, thereby improving the durability of the cutting edge 12. It is increasing.

  FIG. 3 is an enlarged side view showing the inclination angle α and the cutting edge angle θ of the weeding blade 1 of the present invention. By providing an inclination angle α formed in a range of 5 to 10 degrees in a rising manner from the front edge 13 to the rear edge 14 of the blade part 11 and forming the inclined surface 15 forming the blade edge angle θ downward. Since the soil D is cut into an acute angle with respect to the grass G and the ground T, and the soil D is cut into slices, the grass G cutting operation and the ground T raising operation can be performed simultaneously with low cutting resistance. Further, when there are stones or obstacles in the soil, the contact with the blade body 10 reduces the damage of the blade portion 11 and further suppresses the force of scattering of stones and obstacles.

  FIG. 4 is an enlarged side view showing the rebound angle β of the weeding blade 1 of the present invention. The inclined surface 15 forming the blade edge angle θ of the blade portion 11 is formed downward, and the direction of the blade edge angle θ is upward in the length from the tip portion 16 of the third to the quarter of the blade body 10. The blade edge 12 is formed by the horizontal thrust of the rotating weeding blade 1 (lateral swinging force to cut grass G) by forming a rebound angle β that warps in the range of 1 to 5 degrees in the direction. By preventing the biting on the ground T more than necessary, it is intended to prevent accidents caused by biting the mower K and reduce the burden of work labor.

  FIG. 5 is an explanatory view showing a state of a weeding operation using the weeding blade 1 of the present invention. Fig.5 (a) shows the state of the weeding operation | work using the weeding blade 1 of this invention. The grass G growing on the ground and the root N extending in the ground can be cut at the same time, and since the ground T is dug up by the rotation of the blade body 10, the grass G and the root N that are cut off are underground. The effect of becoming a fertilizer can be obtained.

  FIG. 5B shows a state of mowing work using a conventional disc-shaped mowing blade. The grass G growing on the ground can be cut, but the root N extending in the ground cannot be cut.

The effects of the present invention are obvious at a glance if the actual weeding work situation is seen, but since it is difficult to show the effects using drawings and sentences, FIGS. 6 to 9 will be described below using photographs. FIG. 6 is an on-site photograph showing a state immediately after the weeding operation using the weeding blade 1 of the present invention. The area on the left side shown in the figure shows a state where mowing is performed using a conventional disc-shaped mowing blade, and the area on the right side shows a state where weeding is performed using the weeding blade 1 of the present invention. Although it is difficult to understand in the picture shown in the drawing, the weeding state using the weeding blade 1 of the present invention (on the right side of the frame) is because the area where the weeding work has been completed exposes the ground surface, so the area that has been cut is at a glance. I can confirm. On the other hand, in the state of cutting using the conventional disc-shaped grass cutting blade (left side of the frame), the area where the grass G that was cut was scattered by the ground surface and the area that was about to be cut from now can be seen visually. It's getting harder.

FIG. 7 is an on-site photograph showing a state in which 11 days have elapsed since the weeding operation using the weeding blade 1 of the present invention, and the place taken in FIG. 6 is taken after 11 days (the photograph in FIG. 6 is in July 2010). Photographed on the 9th, the photograph in FIG. 7 was photographed for comparison from the same angle on July 20, 2010. The picture shown in the drawing is black and white, so it is difficult to understand, but the area on the right side of the frame is only the color of the soil has changed, the grass G taken has withered to a brown color, and almost no new weeds have grown. Not come. On the other hand, in the area on the left side of the frame, new weeds that are firmly lush and green are growing upward. The 11 days were a period in which the temperature was high and the weeds were likely to grow due to various conditions such as sunshine and precipitation.

  FIG. 8 is an enlarged field photograph showing a state immediately after the weeding operation using the weeding blade 1 of the present invention. The weeding state using the weeding blade 1 of the present invention is that the grass G is cut up and the grass G and the root N that have been dug up and cut back on the ground T are backfilled in the ground. And root N can be reused as fertilizer.

  FIG. 9 is an enlarged field photograph showing a state 11 days after the weeding operation using the weeding blade 1 of the present invention. In the weeding state using the weeding blade 1 of the present invention, there is no evidence that the grass G has grown because the grass G has been rooted and cut. On the other hand, in a state where mowing is performed using a conventional disc-shaped mowing blade, the root G N is not cut, so that the grass G starts to grow again.

  The weeding blade 1 of the present invention can be used by attaching it to a general brush cutter K, and can also be used as a soil digger and a cultivator. It is understood that sex is great.

DESCRIPTION OF SYMBOLS 1 Weeding blade 10 Blade body 11 Blade part 12 Cutting edge 13 Front edge 14 Rear edge 15 Inclined surface 16 Tip part 17 Rotating base 18 Rotating shaft hole

α Inclination angle β Rebound angle θ Cutting edge angle K Brush cutter G Grass N Root root D Soil T Ground

Claims (2)

A rotary cutting blade attached to the tip of the brush cutter,
At least three or more blade bodies provided with a blade portion on the leading edge in the rotational direction are arranged radially equiangularly from the rotating base,
An inclination angle is provided in a rising shape from the front edge to the rear edge of the blade portion, and
Forming a gentle parabolic curve to the rear edge as it moves away from the rotating base,
The weeding blade, wherein the blade portion has an inclination angle of 5 to 10 degrees. An inclined surface that forms the edge angle of the blade portion is formed downward,
The direction of the edge angle is at the tip of one-third to one-fourth of the length of the blade,
The weeding blade according to claim 1, wherein a rebound angle is provided in an upward direction within a range of 1 to 5 degrees.