JP6760635B2 - Weeding unit and brush cutter - Google Patents

Description

The present invention relates to a weeder that runs and cuts grass, and a weeding unit mounted on the weeder.

As a weeding machine for paddy fields, a weeding machine is known in which the surface of a paddy field is agitated with a rotating brush to weed (for example, Patent Document 1).

This type of paddy weeder is particularly effective for initial weeding performed during the period when the plant height is relatively low after rice planting. However, the weeder described in Patent Document 1 can only be used in paddy fields filled with water.

Japanese Unexamined Patent Publication No. 2016-152775

The present invention has been made in view of such circumstances, and provides a weeding unit suitable for weeding paddy fields and also used for weeding fields and the like, and a weeding machine equipped with the weeding unit. I am aiming.

In order to solve the above problems, the weeding unit according to the present invention
A plurality of outer blades which is formed in a circular ring shape, and a plurality of connecting bars which the outer blade is connected at intervals concentrically perpendicular to the machine body traveling direction so as to be able to introduce the grass between the adjacent outer blades With an outer blade that has
A spiral inner blade that is arranged concentrically or eccentrically with the outer blade and sandwiches the introduced grass with the outer blade when rotated.
An inner blade driving means for rotationally driving the spiral inner blade is provided.
The outer blade body is rotatable about the axis of the outer blade .

Since the grass is sandwiched between the outer blade and the spiral inner blade, the grass can be reliably weeded in paddy fields and fields without escaping. Further, since it is sandwiched, it is not necessary to increase the rotation of the spiral inner blade to a high rotation, and it is possible to prevent stone jumping. Moreover, since the spiral inner blade is housed inside the outer blade body, the safety is high.

It is explanatory drawing which shows typically the weeding unit which is 1st Embodiment. It is explanatory drawing which showed the shape of the outer blade. It is explanatory drawing which shows typically the weeding machine which is 2nd Embodiment. It is explanatory drawing which showed the deformation example of the spiral inner blade. It is explanatory drawing which showed the shape of the peripheral part of the spiral inner blade. It is explanatory drawing which shows typically the weeding unit which is a 3rd Embodiment. It is explanatory drawing which shows typically the weeding machine which is 4th Embodiment.

Hereinafter, embodiments embodying the weeding unit and the weeding machine of the present invention will be described with reference to the drawings, but the technical scope of the present invention is, of course, not limited to this. A detailed description of the well-known technique will be omitted.

(First Embodiment)
First, the configuration of the weeding unit 1 according to the first embodiment will be described with reference to FIGS. 1 and 2 (partially also referred to FIG. 3) . FIG. 1 is an explanatory diagram schematically showing the weeding unit 1 of the present embodiment. FIG. 2 is an explanatory view showing the shape of the outer blade.

As shown in FIG. 1, the weeding unit 1 is mainly composed of an outer blade body 11, a spiral inner blade 12, and an inner blade driving means 13. Further, the outer blade body 11 is composed of a plurality of outer blades 111 and a plurality of connecting bars 112.

The outer blade 111 has an annular shape, and as shown in FIG. 2A, the cross-sectional shape of the outer blade 111 in a plane including the axis is rectangular. More specifically, the inside is slightly divergent. In the present embodiment, the cross-sectional shape is rectangular, but it may be trapezoidal, triangular, semicircular or the like. A cutting edge portion 113 is formed on the inner surface side. The cutting edge portion 113 is a portion that sandwiches the grass with the cutting edge portion 123 of the spiral inner blade 12 described later.

As shown in FIG. 2B, the cutting edge portion 113 is like a fine saw blade. Although this shape is used in the present embodiment, a straight blade that is sharp enough to pinch the grass may be used, or any other blade that is suitable for pinching the grass may be used. , Any shape is acceptable. Further, as shown in FIG. 2C, the cutting edge portion 113a may be made a separate member from the outer blade 111 and may be replaceable. Further, in this case, as shown in FIG. 2C, the inside may be further expanded.

As shown in FIG. 1, the outer blades 111 are connected by a plurality of connecting rails 112 at concentric intervals orthogonal to the traveling direction of the machine body so that grass can be introduced between the outer blades 111. .. That is, a plurality of outer blades 111 and a plurality of connecting bars 112, that has the outer blade 11 is formed.

The connecting rail 112 connects the outer blade 111 at three points in the side view. However, although this configuration is used in the present embodiment, it may be changed at any time, such as 4 points if the diameter of the outer blade is large and 2 points if the diameter is small. Further, the connecting rail 112 does not need to be arranged in a straight line as in the present embodiment.

The outer blade body 11 has support portions 15 and 15 that are connected to the inside of the outer blade 111 on the rightmost side and the outer blade 111 on the leftmost side in the traveling direction of the machine body to fix the bearings 17 and 17. It is formed. As shown in FIG. 3, the support portions 15 and 15 are rotatably supported by the main body of the weeder 2 by the bearings 17 and 17. However, in the present embodiment, such a configuration is adopted, but a cantilever type may be used. That is, any configuration may be used as long as the outer blade 11 is rotatably supported and the spiral inner blade 12 is rotationally driven.

As shown in FIG. 1, the spiral inner blade 12 is arranged eccentrically with the outer blade 111, and when rotated, the introduced grass is sandwiched between the outer blade 111 and the introduced grass. More specifically, as shown in FIG. 1B, the axial center of the spiral inner field 12 is forward and downward with respect to the axial center of the outer blade 111. The shape of the spiral inner blade 12 may have a central axis as in the present embodiment, or may not have a central axis as in the spiral inner blade 12a shown in FIG. If it does not have a central axis, it is possible to prevent entanglement of grass. In the present embodiment, the spiral inner blade 12 is arranged eccentrically with the outer blade 111, but it may be concentric.

FIG. 5 is an explanatory view showing the shape of the peripheral edge portion of the spiral inner blade 12. As shown in FIG. 5A, the cross-sectional shape of the peripheral edge of the spiral inner blade 12 by the plane including the axis is rectangular. More specifically, the outside is slightly wider. In the present embodiment, the cross-sectional shape is rectangular, but it may be a trumpet shape that expands toward the outside. A cutting edge portion 123 is formed on the outer peripheral surface side of the spiral inner blade 12.

As shown in FIG. 5B, the cutting edge portion 123 is like a fine saw blade like the cutting edge portion 113 of the outer blade 111. In this embodiment, such a shape is used, but as with the cutting edge portion 113, any shape may be used as long as it is suitable for sandwiching grass. It does not necessarily have to have the same shape as the cutting edge portion 113. Further, as shown in FIG. 5C, the cutting edge portion 123a may be made a separate member from the spiral inner blade 12 and may be replaceable. Further, in this case, as shown in FIG. 5C, the outer peripheral surface side may be further expanded.

As shown in FIG. 1, the spiral inner blade 12 is supported at both ends by bearings 18 and 18 . However, in the present embodiment, such a configuration is adopted, but a cantilever type may be used. The rotation direction of the spiral inner blade 12 is clockwise when viewed from the left side in the traveling direction of the airframe (when the airframe traveling direction side is the front, the right side is viewed). Further, the spiral inner blade 12 is wound leftward from the front side view to the back side. By doing so, the outer blade 111 and the spiral inner blade 12 are sandwiched from the bottom to the top, so that a portion closer to the root can be cut. However, in the present embodiment, although such a configuration is adopted, the rotation direction and the winding direction of the spiral inner blade 12 are arbitrary.

For example, the rotation direction of the spiral inner blade 12 may be switched between clockwise and counterclockwise in the left side view in the traveling direction of the machine body. In this way, the cutting edges 113 and 123 of the outer blade 111 and the spiral inner blade 12 can be used not only on one side but also on both sides, so that the life can be extended. In addition, the discharge direction of the cut grass can be changed to the right direction and the left direction of the aircraft traveling direction.

The inner blade driving means 13 is a set of a motor for rotationally driving the spiral inner blade 12 and its peripheral equipment. Since these are well-known techniques, description thereof will be omitted.

Weeding unit 1 may be embedded in the hand type herbicidal machine, Ru is used or mounted on a self-propelled herbicidal machine.

(Second Embodiment)
Then, with the herbicidal machine 2 is a second embodiment provided with the herbicide unit 1 will be described with reference to FIG. Figure 3 is an explanatory diagram herbicidal machine 2 of the embodiment shown schematically.

The weeder 2 is a hand-pushed weeder equipped with a weeding unit 1.

In this way, when the weeding unit 1 is mounted on the hand-push type weeder 2 , the outer blade body 11 acts as a wheel, so that it is not necessary to provide wheels on the lateral side of the weeding unit 1 , and the width seedlings Weeding can be done even in narrow spaces. Further, in the case of a self-propelled weeder, the outer blade body 11 can be a wheel on the side other than the driving wheel.
Since the outer circumference of the outer blade 111 can be used evenly, the life of the outer blade 111 can be extended.

(Third Embodiment)
Next, the configuration of the third embodiment in which the herbicidal unit 3 will be described with reference to FIG. FIG. 6 is an explanatory diagram schematically showing the weeding unit 3 of the present embodiment.

As shown in FIG. 6 , the weeding unit 3 differs from the weeding unit 1 only in that the outer blade body 21 is rotationally driven by the outer blade body driving means 36. Therefore, only this part will be described.

Similar to the weeding unit 1 , the outer blade body 21 is a support portion 15 that connects the outer blade 111 to the inside of the outer blade 111 on the rightmost side and the outer blade 111 on the leftmost side in the traveling direction of the machine body to fix the bearing. , 16 are formed. The outer blade driving means 36 is connected to the support portion 16.

The outer blade driving means 36 is a set of a motor for rotationally driving the outer blade body 21 and peripheral equipment thereof. Since these are well-known techniques, description thereof will be omitted.

With such a configuration, the weeding unit 3 can be used, for example, as a drive wheel of a self-propelled weeder. In this case, as shown in FIG. 6 , the connecting rail 112a may be provided on the outside of the outer blade 111. The connecting rail 112a can serve as a non-slip.

(Fourth Embodiment)
Next, the configuration of the weeder 4 according to the fourth embodiment will be described with reference to FIG. 7 . FIG. 7 is an explanatory diagram schematically showing the weeder 4.

As shown in FIG. 7 , the weeder 4 has four weeding units 3 used as driving wheels.

The drive source of the inner blade drive means 13 is the motor 131, and the drive sources of the outer blade drive means 36 are the motors 361 and 361. A generator 451 that supplies electric power for driving the motors 131, 361, and 361 and an engine 452 that drives the generator are mounted. Further, a control device 453 that controls the electric power generated by the generator 451 and supplies the electric power to the motors 131, 361, and 361 is mounted.

The motor is easier to control than the engine, and for example, the direction can be easily changed by changing the outputs of the left and right outer blade driving means 36. Further, since the driving power of the motors 131, 361, and 361 is supplied by the generator 451 driven by the engine 452, if the engine 452 is refueled, it can be used for a long time without worrying about the battery running out.

In the present embodiment, the rotation direction of the spiral inner blade 12 is clockwise in the left side view in the airframe traveling direction (when the airframe traveling direction side is the front, the right side view). Further, the spiral inner blade 12 on the right side in the traveling direction of the airframe is left-handed from the front side view to the back, and the spiral inner blade 12 on the left side in the traveling direction of the airframe is right-handed from the front side view to the back. By doing so, the cut grass can be discharged to both the left and right sides of the machine body. However, in the present embodiment, although such a configuration is adopted, the rotation direction and the winding direction of the spiral inner blade 12 are arbitrary. For example, the rotating inner blade 12 on the front wheel side and the rotating inner blade 12 on the rear wheel side. The rotation direction of the may be reversed.

The above-mentioned contents are merely related to one embodiment of the present invention, and do not mean that the present invention is limited to the above-mentioned contents. For example, in the above embodiment, the spiral inner blade 12 has been described as being continuous in a spiral shape, but it may be divided, and a screw of a ship or a blade of a fan is arranged at a predetermined interval. It does not matter if it is done. Further, as shown in FIGS. 2 and 5, the cutting edges 113 and 123 of the outer blade 111 and the spiral inner blade 12 are formed on both the left and right sides in the drawing, but the spiral inner blade 12 rotates in only one direction. In the case of, it may be formed only on the side where the grass is cut.

1 Weeding unit 1 (first embodiment)
2 Herbicidal machine 2 (second embodiment)
3 Weeding unit 3 (third embodiment)
4 Weeder 4 (4th embodiment)
11 Outer blade 111 Outer blade 112 Connecting rail 12 Spiral inner blade 13 Inner blade driving means
21 Outer blade body 36 Outer blade driving means 131 Motor 361 Motor 451 Generator 452 Engine 453 Control device

Claims (5)

It is a weeding unit mounted on a weeder that runs and cuts grass.
A plurality of outer blades which is formed in a circular ring shape, and a plurality of connecting bars which the outer blade is connected at intervals concentrically perpendicular to the machine body traveling direction so as to be able to introduce the grass between the adjacent outer blades With an outer blade that has
A spiral inner blade that is arranged concentrically or eccentrically with the outer blade and sandwiches the introduced grass with the outer blade when rotated.
An inner blade driving means for rotationally driving the spiral inner blade is provided.
The outer blade body is a weeding unit that is rotatable around the axis of the outer blade . The weeding unit according to claim 1, wherein the rotation direction of the spiral inner blade is clockwise in the left side view in the traveling direction of the airframe. Further, the outer blade body driving means for rotationally driving the outer blade body in the counterclockwise direction in the left side view in the traveling direction of the machine body is provided.
The weeding unit according to claim 1 or 2 , wherein the outer blade has a function as a driving wheel. A weeder equipped with the weeding unit according to any one of claims 1 to 3 . A weeder equipped with a plurality of weeding units according to claim 3 .
The drive source of the inner blade driving means and the outer blade driving means is a motor.
Further, a generator that supplies electric power for driving the motor and
The engine that drives the generator and
A brush cutter equipped with.

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