JP2008167733A - Weeder of sawtoothed blade for shaving off weed by pushing handle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the disadvantages that force for pressing a blade tip against the ground surface becomes averaged over the entire blade width, and the blade tip slides, and easily escapes on the hard ground surface, or the blade tip is less apt to bite into the ground surface where weeds with spread roots grow thick and makes it difficult for biting in cutting ability, because conventional weeders have linear blades that are attached to a handle, at right angles relative to the center line thereof, and so on. <P>SOLUTION: The force for pressing the blade tip against the ground surface is concentrated in a sharp part of the blade tip by forming the weeding blade tip into a sharp sawtoothed state, so that sliding and escaping of the blade tip are improved; the sawtoothed weeding blade is attached in the form of a pointed knife, in the oblique direction so that the movement of the blade similar to that when cutting wood with a saw becomes possible;and the cutting ability is improved and the responsive ground surface and width of the weeds become widened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a weeder that scrapes off weeds such as a garden, a park, a precinct, and a schoolyard by pushing a handle with a blade at the tip.

  Conventionally, this type of weeder has been waiting for a triangular blade. (See Patent Document 1 and Patent Document 2)

  Hereinafter, a conventional weeder will be described with reference to FIGS. FIG. 7 is a plan view in which the straight blade edge 101a of the weeding blade 101 intersects the tip of the handle attachment 102 at a substantially right angle, and is attached as shown in a side view and FIG. A handle is attached to the handle attaching tool 102, the blade edge 101a is applied to the ground to be weeded obliquely downward, and the weed is scraped off while the blade is pushed into the ground by pressing the handle.

  Design Gazette 246585   Design Gazette 359892

Conventional weeders have the following problems.
(A) In a straight blade, the force pressing the blade edge against the ground is averaged and distributed over the entire blade width, and as the ground becomes harder, the blade edge slips and escapes easily, and it is difficult to bite into the ground.
(B) In places where weeds with dense roots are dense, the brittleness of the ground is reinforced by the roots of the weeds, so that the cutting edge is difficult to bite and a large force is required to break it.

  The present invention is intended to solve the problems of such a conventional weeder, and is intended to realize a weeder that is easy to work and can provide a great weeding effect.

  The first solving means is that the cutting edge of the straight weeding blade is formed in a sawtooth shape.

  And the 2nd solution means the weeding blade conventionally attached so that it might cross at right angles with respect to the center line of the front-back direction of a handle, seeing from the upper surface in the state where the upper surface of the weeding blade was leveled That is, the direction of the blade edge is directed diagonally forward.

  The action of the first solution means that the cutting edge is serrated so that when the cutting edge is first applied to the ground, only the sharp part at the tip of the cutting edge is in contact with the ground, and a force for concentrating and pressing is applied thereto. It is hard to slip and the cutting edge is easy to bite into the ground.

  The operation of the second solving means is as follows. For example, when cutting wood with a saw, it is impossible to cut the wood simply by pressing the blade against the wood, and it can be cut by sliding the blade in the pressed state. That is, the sawtooth weeding blade employed in the first solution is slid to improve the cutting ability and try to cut the ground.

  The ground itself is more fragile than wood at a stage where relatively small weeds are growing, and can be cut only by pressing the cutting edge. However, when dense weeds grow and reach countless roots in the ground, it is difficult to cut them simply by pressing the blade edge.

  However, when the saw blade edge is pressed against the ground and the movement of sliding the blade is used together, the blade movement resembles that in the case of cutting wood, and cutting can be performed with a lighter force. That is, by pressing the handle, the blade may be moved in the same way as cutting a wood with a saw. However, with a weeding blade crossed at right angles to the center line of the handle, it is necessary to move the cutting edge slightly forward from the side, which is difficult to operate and difficult to work.

  Therefore, as shown in the plan view of FIG. 2, it is impossible to push the handle diagonally to the right and slide the blade tip while sliding the blade tip by attaching a sawtooth weeding blade diagonally to the center line of the handle. I can do it now. Further, if the acute angle portion 12 at the angle at which the center line 11 of the handle intersects the leading edge 13 of the blade is further narrowed, the cutting width is reduced, but the blade tip can be slid by simply pushing the handle straight. It is possible to move the blade closer and weed with a lighter force, which is effective against rooted weeds. In FIG. 2, the direction of the front edge of the blade of the weeding blade is the left front as viewed from the operator side, but even a weeding blade facing the right front can be used without a sense of incongruity.

  As described above, the weeding device according to the present invention has a saw blade-shaped cutting edge, and the blade is attached in a cut-out oblique direction so that the weed to be weeded is relatively small in front of the handle. The weeding width is widened by pushing to the side, and for weeds with large roots, the weeding width becomes narrow, but the operation of pushing slightly forward while sliding the cutting edge against the ground to be cut, or FIG. As shown in (c), by reducing the acute angle portion 12 of the angle at which the center line of the handle intersects the leading edge of the blade, it becomes possible to cut with a lighter force, and the width of the weed that can be handled becomes wider. It was. By simply pushing the handle straight, the blade tip moves forward while entering the ground, so there is no need to press the handle against the ground from above, and there is no need to lift the blade tip at all, so the weight of the main body is an operator burden. On the contrary, the large inertia increases the herbicidal effect. Holding the handle with both hands, weeding can be done simply by repeating the movement back and forth, providing an easy and efficient weeding device.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view of a main part of a weeder using a saw-toothed weeding blade of the present invention. The weeding blade 1 is fixed to a weeding blade holder 2 by bolts 4 and nuts 5, and the weeding blade holder 2 has a handle. 3 is fixed with bolts 7 and nuts 8.

  FIG. 2 is a plan view when the top surface of the weeding blade is horizontal, in front of the blade connecting the handle center line 11, the tip 1y of the tooth at the front end of the sawtooth weeding blade, and the tip 1z of the tooth at the rear end of the weeding blade. By narrowing the angle 12 with which the straight line intersects the edge 13, that is, by making the leading edge of the blade that was conventionally attached at a right angle to the center line of the handle obliquely, Pushing forward right diagonally can now be done without difficulty, and the ground can be cut more lightly by making the blade move similar to cutting wood with a saw.

  FIG. 3 is a side view, and the weeding blade 1 is attached to the handle at a certain angle so that the cutting edge can enter the ground at a shallow angle.

  FIG. 4 is a plan view of an embodiment in which the angle of the weeding blade can be changed, and an acute angle portion 12 at an angle where the center line 11 of the handle intersects the leading edge 13 of the blade is shown in the mounting hole 14 of the weeding blade. It can be changed in two stages depending on the use. By narrowing this angle, the weeding width is narrowed, but the ground can be cut with a light force, which is effective for rooted weeds. (A) is a state in which the weeding blade is attached at an angle of about 45 degrees, (c) is about 20 degrees before the weeding blade is attached. The shape of the weeding blade mounting hole can be an arc-shaped elongated hole, or a long hole-shaped notch can be formed from the end surface of the weeding blade, and the weeding blade can be rotated to set the angle. The angle of the blade may be changed by properly using the hole opened on the weed blade holding tool side.

  FIG. 5 shows a state in which the weeding device of the present invention is used, holding the rear part of the handle with both hands, applying the weeding blade edge to the ground, pushing the handle, cutting the ground and weeding.

  Figure 6 shows a retractable rake at the front of the handle that allows weeded weeds to be removed without changing to a separate rake. (A) When the rake is ready for use, (B) is a perspective view at the time of rake accommodation. During weeding, weeds that have not been weeded are often hidden under weeded weeds and missed, and it is desirable to weed while frequently removing weeds. When using a separate rake, after placing the weeder, change it to a rake to remove the weeds that have already been weeded, and then transfer to the weeder again to carry out the weeding work. Since this work is frequently performed during weeding, a separate rake is inconvenient, and by installing a rake on the weeder, the rake can be used simply by rotating the handle, improving workability. Even when used with a rake, there is almost no hindrance to the weeding work, and when weeding large weeds or weeding in a narrow place, it can be stored when it gets in the way.

  Perspective view of main parts of the weeder of the invention   Top view of the main part   Side view of the main part   It is a principal part top view of the Example which enabled it to change the angle with respect to the centerline of the handle of the same weeding blade, (a) is a figure before attaching the weeding blade, (b) is a weeding blade at an angle of about 45 degrees. The attached figure, (c) is a figure with the weeding blade attached at an angle of about 20 degrees.   The figure which shows the state of work of the same use   It is the perspective view which added the rake to the front part, (a) is the figure which put the rake in use, (b) is the figure of the state which stored the rake.   Conventional weeder plan view   Side view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weeding blade 1b Top surface of weeding blade 1y Tip of tooth at front end of weeding blade 1z Tip of tooth at rear end of weeding blade 2 Weeding blade holder 3 Handle 11 Centerline of handle 12 Centerline of handle intersects with leading edge of blade The sharp edge of the angle 13 The leading edge of the blade

Claims (4)

  In a plan view with the sawtooth weed blade top surface horizontal and the handle placed horizontally on the same horizontal plane, or with the handle front end applied to the same horizontal plane and the rear end raised to tilt the handle A weeder with a sawtooth weed blade attached directly or indirectly to the front of the handle with the blade side facing forward or diagonally forward.   The top surface of the sawtooth weed blade is horizontal and the tip of the tooth at the front end of the weed blade is connected to the tip of the tooth at the back end of the weed blade on a plan view with the blade side facing the diagonally forward. If the straight edge is the leading edge of the blade, the acute angle part of the angle where the leading edge of the blade or its extension line intersects the center line of the handle or its extension line is in the range of 5 degrees to 80 degrees, the front part of the pattern A weeder with a serrated weed blade attached directly or indirectly with the front edge of the blade facing diagonally forward.   The weeder according to claim 1, wherein the length of the handle including the weeding blade holder is 0.5 m or more and 5 m or less.   The weeder according to claim 2, wherein the length of the handle including the weeding blade holder is 0.5 m or more and 5 m or less.

Images