Grass shears

Abstract

To address such a problem that conventional grass shears only using straight blades on a blade body, are not suitable for universally cutting grass of various shapes and hardness.SOLUTION: Grass shears comprise a pair of blade bodies, each having a blade part on one side, pivotally supported by a support shaft so as to be opened and closed freely with the blade parts facing each other, and a pair of handles connected to bases of the blade bodies, where the blade bodies are curved convexly on the blade part side. Further, the blade parts include two protruding blades with sharp tips joined together with a gap formed therebetween, and a plurality of cutting edges, each having an outer peripheral edge forming an approximate M-shape, are arranged in series at prescribed intervals, where the approximately M-shaped cutting edges include serrated blades formed inside thereof, and straight blades formed outside thereof.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to grass shears used for cutting lawns, cutting weeds, etc. [Background technology]

[0002] Conventional grass shears have a structure in which a pair of blades, each with a straight blade on one side, are supported on a shaft and rotated around a fulcrum, cutting the object by pressure and friction as the blades come into contact with the object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 8-154491 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional grass shears only use straight blades on the blade body, so they are not suitable for universally cutting grass and branches of various shapes and hardness. [Means for solving the problem]

[0005] In order to solve the above problems, the grass shears of the present invention comprise a pair of blade bodies, each having a cutting portion on one side thereof, pivotally supported by a support shaft so that the cutting portions face each other and capable of being opened and closed, and a pair of handles connected to the bases of the blade bodies, the blade bodies being convexly curved on the blade portion side. The cutting portions have two sharp-pointed protruding blades joined with a gap between them, and a plurality of cutting blades whose outer peripheries form a roughly M-shape are arranged at predetermined intervals, with a saw-like blade formed on the inside of the roughly M-shaped cutting blade and a straight blade formed on the outside of the cutting blade. [Effects of the Invention]

[0006] According to the grass shears of the present invention, even if the weeds to be cut are a mixture of various shapes and hardnesses, the objects are cut in two stages using blades with different properties, so no weeds are left uncut. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a plan view of the grass shears of the present invention. FIG. [Figure 2] 1 is a side view of the grass shears of the present invention. FIG. [Figure 3] FIG. 2 is an enlarged view of the blade of the grass shears of the present invention. [Example]

[0008] FIG. 1 is an external view of grass shears according to the present invention. FIG. 2 is a side view of grass shears according to the present invention. In FIGS. 1 and 2, reference numeral 1 denotes a pair of blades made of a metal such as iron or stainless steel, with blade portions 2 on one side of the blade bodies 1. The pair of blade bodies 1 are pivotally supported by support shafts 4 so that the blades can be opened and closed. The blade bodies 1 are curved so that the blade portion 2 side is convex, and the blade portions 2 have two sharp-pointed protrusions connected to each other and a plurality of cutting edges 3 with a generally M-shaped outer periphery connected at predetermined intervals. Furthermore, one end of a pair of handle portions 6 is connected to the base of the blade bodies 1 by connecting portions 5a so that the angle between the blade bodies 1 and the pair of handle portions 6 can be freely changed in a direction perpendicular to the opening and closing direction of the blade bodies 1. A grip portion 7 is connected to the other end of the handle portion 6 by connecting portion 5b so that the angle can be freely changed in a direction perpendicular to the opening and closing direction of the blade bodies 1.

[0009] 3 is an enlarged view of the blade body 1 of the grass shears of the present invention. Two sharp-pointed protruding blades 8a and 8b are joined via a gap 11 on the cutting section 2 of the blade body 1, forming a cutting edge 3 with a roughly M-shaped outer periphery. A saw blade 9 is formed on the inside of the roughly M-shaped cutting edge 3, and a straight blade 10 is formed on the outside of the protrusions 8a and 8b. The space between the adjacent cutting edges 3 forms a curved blade 12 that follows the curvature of the blade body 1.

[0010] With the grass shears of the present invention configured as described above, first, the gripping portions 7 are opened with both hands, causing the pair of blade bodies 1 to open around the support shafts 4. Then, the open blade bodies 1 clamp the object to be cut, such as weeds, and when the gripping portions 7 are closed, the cutting blades 3 first come into contact with the object, and the saw blades 9 formed on the cutting blades 3 pierce and cut the weeds. Then, the straight blades 10 and the curved blades 12 provided in the gaps 11 use shearing force and friction to further cut the weeds into smaller pieces. Because the object is cut in two stages using blades with different properties, no cutting residue is left uncut, even when the object is a mixture of various shapes and hardnesses. Furthermore, the curved blades 1 allow the object to be cut in an efficient manner, as if pushing it out. Furthermore, the gaps 11 collect cutting chips from the weeds cut by the saw blades 9, preventing them from becoming tangled around the saw blades 9. [Explanation of symbols]

[0011] 1...Blade body, 2...Blade part, 3...Cutting blade, 4...Spindle part, 5a, 5b...Connecting part, 6...Handle part, 7...Gripping part, 8a, 8b...Protruding blade, 9...Saw blade, 10...Straight blade, 11...Gap part, 12...Curved blade

Claims

1. The grass shears are characterized in that a pair of blade bodies each having a cutting portion on one side thereof are pivotally supported by a support shaft so as to be able to open and close freely with the cutting portions facing each other, and a pair of handles are connected to the bases of the blade bodies, and the blade side of the blade bodies is curved convexly.

2. The grass shears according to claim 1, characterized in that the blade portion has two protruding blades with acute-angled tips connected with a gap between them, and multiple cutting edges whose outer periphery is approximately M-shaped are arranged in a row at a predetermined interval.

3. The grass shears according to claim 2, wherein a saw-like edge is formed on the inside of the approximately M-shaped cutting blade, and a straight edge is formed on the outside of the cutting blade.

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