JP2006345754A - Mowing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To produce a hoe having a blade body equipped with side blades as well as fork parts, as strong, with ease. <P>SOLUTION: This hoe is constituted by a long shaft and a blade body 2 attached at the tip end of the long shaft. The blade body 2 is provided by installing a multiple number of comb plate parts 21 as protruded at the front edge side of a plate-formed base plate part 20 and also being equipped with fork parts 23 formed by twisting the comb plate parts so as to approximately cross at right angle with the base plate part, cutting blade parts (horizontal blade parts) 25 formed at the front edge of the base plate part between the fork parts and a shaft-mounting part 26 installed at the base plate part, forming blades (vertical blade parts) 24 at the upper surface side of the blade body facing toward the long shaft side in the tip end and tip part of the fork part 23 and making the cutting blade parts (horizontal blade parts) as recessed and curved blades. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hand-held grass cutter used in a cocoon style and a method of manufacturing the grass cutter blade.

  A scythe is known as a hand-held weeding tool (mowing tool), but a standing scythe composed of a blade and a long handle used in a saddle style is especially known so that weeding work can be performed while standing. (Patent Document 1).

  Also, as a mowing blade body, a rake-like mowing tool in which a plurality of forks and a band-like blade are combined is known in order to increase work efficiency (Patent Document 2).

FIG. 1 of Japanese Utility Model Publication No. 52-18015. Japanese Utility Model Publication No. 2-29855.

  Providing the fork portion like the grass cutter described in Patent Document 2 is for cutting the grass with the fork portion and cutting with the band-like blade body while adjusting the direction in the mowing work with the belt-like blade body like the standing sickle. Therefore, grass cutting (cutting) can be performed without the need to bundle the grass with a hand like a normal sickle, so that effective grass cutting is realized. It is also convenient because you can collect grass that has been cut like a rake.

  However, the instrument disclosed in Patent Document 2 is manufactured by fixing a band-shaped blade plate separately formed on a plurality of fork parts to the fork part with a bolt or the like. There are problems in use due to changes.

  In manufacture, it is dangerous to fix the member provided with the blade portion with a bolt or the like because it is a manual work. In particular, since the blade portion is formed and heat treated (the blade will become dull immediately if heat treatment is not performed), it is necessary to predict the state after the heat treatment in advance to provide the position of the bolt hole, so that there is a margin If they are held, extra parts such as washers are required.

  Further, if the bolt connecting portion is loosened due to secular change, the positional relationship between the fork portion and the belt-like blade body may be shifted, cutting efficiency may be lowered, and the belt-like blade body may be detached.

  Therefore, the present invention proposes a novel mowing tool in which a band-shaped blade portion and a fork portion are integrally formed.

  The mowing tool according to the present invention is composed of a long handle and a blade attached to the tip of the long handle, and the blade protrudes from the front edge side of the plate-like substrate portion with a plurality of comb plate portions and the comb plate portion as a substrate. Forks formed by twisting so as to be substantially orthogonal to the parts, a cutting blade part formed at the front edge of the board part between the fork parts, and a handle mounting part provided on the board part It is.

  Thus, by gripping the long handle and using it like a spear, the grass is raised by the fork and cut by the cutting blade.

  Further, in the present invention, in particular, in the grass cutter, the front edge portion of the substrate portion that forms the cutting blade portion (lateral blade portion) is formed in the concave portion to form a concave curved blade, and the long handle at the tip and tip of the fork portion The blade (vertical blade portion) is formed on the upper surface side of the blade body facing the side.

  Thus, when the fork portion causes the grass, the grass does not get entangled with the fork portion (cut by the vertical blade portion).

  Since the mowing tool of the present invention adopts the above-described configuration, the fork portion and the cutting blade portion (horizontal blade portion) are integrally formed, so that manufacturing is easy and there is a risk of damage due to secular change. It will be less.

  In particular, the cutting blade portion (horizontal blade portion) is formed as a curved blade, and the fore portion is formed as a vertical blade portion so that cutting with a mowing can be performed efficiently.

  Next, an embodiment of the present invention will be described. The mowing tool of the embodiment includes a long handle 1 and a blade body 2 attached to the tip of the long handle 1.

  The blade body 2 will be described based on its manufacturing procedure. A metal plate (iron plate) having a predetermined thickness is provided with a plurality of comb plate portions 21 on the front edge side of the substrate portion 20, and the comb plate portion 21. Punched into a comb shape with a concave curved edge surface 22 between them (die cutting process: FIG. 4A).

  Next, the comb plate portion 21 is twisted so as to be substantially orthogonal to the substrate portion 20 to be formed on the fork portion 23, and the vertical edge portion 24 is formed by grinding the tip of the fork portion 23 and the top end portion on the upper surface side. Further, the concave curved edge surface 22 is ground to form a side blade portion (cutting blade portion) 25 (blading step: FIGS. 4B and 4C).

  And the fork part 23, the side blade part 25, and the front part side of the board | substrate part 20 are hardened, and a robust blade is provided (heat treatment process: FIG. 4 D).

  Further, the base portion side of the substrate portion 20 at the non-heat-treated portion is appropriately raised in the upper surface direction, and the handle mounting portion 26 is attached to the raised upper surface 27 by welding or the like (pattern mounting portion attaching step: FIG. 4E). The structure of the handle mounting portion may be any structure as long as the blade body 2 can be mounted on the distal end portion of the long handle 1, and the structure is arbitrary.

  Thus, the blade body 2 produced by the above means is attached to the long handle 1 at the tip portion of the long handle 1 by means corresponding to the structure of the handle mounting portion 26.

  The above-mentioned mowing tool carries out mowing by grasping the long handle 1 so that the fork portion 23 is on the near side and pulling on the ground surface like a spear. In particular, even if the grass is lying down, the grass is raised by the fork portion 23, introduced into the side blade portion 25 and cut, and in particular, by forming the side blade portion 25 into a curved blade, as if This is the same mowing work as bundling and cutting grass by hand.

  Further, in the above mowing work, the vertical blade portion 24 is provided. Therefore, when the grass is caused by the fork portion 23, the grass is cut by the vertical blade portion 24 even if the grass is complicatedly intertwined. Therefore, the grass does not get tangled in the fork portion 23, and the mowing operation can be performed smoothly.

  Further, since the blade body 2 is formed of a single member (excluding the handle mounting portion 26), the vertical blade portion 24 and the horizontal blade portion 25 are not separated due to secular change, so that the tool has excellent durability. Become.

  Further, as described above, the blade body 2 is produced by processing a single member (excluding the handle mounting portion 26), and its manufacture is facilitated.

1 is an overall perspective view of an embodiment of the present invention. The perspective view of the blade body. Sectional drawing of the blade body. Explanatory drawing of the manufacturing process of the blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Long handle 2 Blade body 20 Substrate part 21 Comb board part 22 Concave curved edge surface 23 Fork part 24 Vertical blade part 25 Horizontal blade part (cutting blade part)
26 Handle mounting part 27 Raised upper surface

Claims (4)

  The blade is composed of a long handle and a blade attached to the tip of the long handle, and the blade has a plurality of comb plates protruding from the front edge side of the plate-like substrate, and the comb plate is twisted so as to be substantially orthogonal to the substrate. And a cutting blade portion formed at the front edge of the substrate portion between the fork portions, and a handle mounting portion provided on the substrate portion.   The mowing tool according to claim 1, wherein a front edge portion of the substrate portion forming the cutting blade portion is formed in a concave portion to form a concave curved blade.   The mowing tool according to claim 1 or 2, wherein a blade is formed on the upper surface side of the blade body facing the long handle side at the tip and tip of the fork portion.   A predetermined metal plate is provided with a plurality of comb plate portions on the front edge side of the substrate portion, and is punched into a comb body shape having a concave curved edge surface between the comb plate portions so that the comb plate portion is substantially orthogonal to the substrate portion. Twist to form on the fork part and grind the tip and top side tip of the fork part to form the vertical blade part, grind the concave curved edge surface to form the horizontal blade part, the fork part and the horizontal blade part A blade of a mowing tool, which is produced by quenching a range to be included and attaching an appropriate handle mounting portion to a non-heat-treated portion of the substrate portion.

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