JP2001178222A - Sawtoothed bladed tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sawtoothed bladed tool capable of being simply ground, simply reproducing good sharpness and enabling to be used for a long time. SOLUTION: In this sawtoothed bladed tool, a blade-forming part 16 having a longitudinal cross section of almost triangular wave shape is formed in a predetermined width toward the teeth edge 18 on at least one surface of a blade part 14 comprising a plate material. The teeth edge 18 of the blade- forming part 16 is formed with a blade forming ground surface 22 formed to be slanting against the back surface of the blade part 14 of the plate material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw blade for cutting vegetation by hand.

[0002]

2. Description of the Related Art Conventionally, for example, a scythe for cutting grass has a saw-toothed blade shape. When a scythe having such a blade is worn, the blade eyes are cut one by one. It was sharpened with a special file to reproduce good sharpness.

[0003]

In the case of the above-mentioned prior art, the work of sharpening the teeth of the saw-like blade one by one is troublesome, and when the peak of the blade becomes smaller, it cannot be further sharpened. Had to be replaced with a new one.

The present invention has been made in view of the above-mentioned problems of the prior art, and has a simple grinding operation, can easily reproduce good sharpness, and can be used for a long time. An object of the present invention is to provide an edged cutter.

[0005]

According to the present invention, a blade forming portion having a substantially triangular wave-shaped cross section in a longitudinal direction of the blade is provided on at least one surface of a plate member having the blade formed thereon, with a predetermined width toward a blade edge. It is formed. A blade edge of the blade forming portion is provided by a blade forming and polishing surface formed obliquely to the surface of the plate material, and the blade forming portion is a saw blade-shaped blade having a blade formed by the blade forming and polishing surface.

The blade forming section is formed by shaping a plate material into a triangular wave shape in a cross section in the longitudinal direction of the blade. Further, the blade formed by molding the plate material,
The two blades are overlapped so that the peaks and valleys of the blade edge are alternated.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a first embodiment of a saw blade-shaped cutting tool according to the present invention. The sickle 10 includes a handle portion 12 and a blade portion 14 made of a plate material such as a blade steel material. The blade portion 14 has a shape curved in an arc shape. As shown in FIG. 3, a blade forming portion 16 having a substantially triangular wave cross section in a longitudinal direction is formed on one side surface of the blade portion 14 at a predetermined width. Blade edge 1
8 are formed. The blade forming section 16 is provided with the blade section 1.
4 is formed over one half of the width of one side surface, and the surface opposite to the surface on which the blade forming portion 16 is provided is a flat surface.

On the back side of the blade forming portion 16 and at the blade edge 18
As shown in FIG. 3B, saw blade formation formed at a predetermined angle from the back 20 side of the back surface of the blade portion 14 to the edge of the blade edge 16 with respect to the blade formation portion 16. A polishing surface 22 is provided. With the saw blade forming and polishing surface 22, the triangular wave-shaped peak portion becomes the tip portion of the blade edge 18, and the valley portion becomes the valley portion of the blade edge 18. The triangular-wave-shaped blade forming portion 16 may have a sawtooth-shaped triangular wave shape having different slopes, other than an isosceles triangular wave, and the shape may be appropriately set.

According to the sickle according to this embodiment, when the blade of the blade edge 18 is rounded and the sharpness is reduced by use, the saw blade forming polishing surface 22 is polished in a predetermined range or the whole at once by a polishing machine or the like. For example, the blade edge 18 is reproduced in a sharp saw blade shape by the triangular wave shape of the blade forming portion 16. And the regeneration of the blade,
It is possible to use up the entire width of the blade forming portion 16, and it is possible to use it for a very long time.

Next, a second embodiment of the saw-shaped blade of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. This embodiment is also for a sickle.
Is formed by forming a blade forming portion 26 of a blade portion 24 by pressing a plate material such as a blade steel material. As shown in FIG. 6 (c) and the like, the shape of the blade portion 24 is formed by shaping the cross section of the blade forming portion 26 in the longitudinal direction into a triangular wave shape.

The blade edge 28 of the blade forming portion 26 has
(B) As shown in FIG.
A saw blade forming polished surface 32 is formed obliquely at a predetermined angle from the back 30 to the end of the blade edge 26. Due to the saw blade forming and polishing surface 32, one portion of the triangular wave-shaped peaks and troughs becomes the tip of the blade edge 28, and the other portion forms the trough of the blade edge 28. The triangular-wave-shaped blade forming portion 26 may also have a sawtooth-shaped triangular-wave shape in addition to the isosceles-triangular triangular-wave shape, and the shape may be appropriately set.

According to the sickle 10 of this embodiment, when the blade of the blade edge 28 is rounded and the sharpness is reduced by use, if the saw blade forming polishing surface 32 is polished at once with a polishing machine or the like, the blade edge is reduced. The edge 28 is reproduced in a sharp saw blade shape by the triangular wave shape of the blade forming portion 26. Regeneration of the blade is possible until the entire width of the blade forming portion 26 is completely used, and it is possible to use the blade for an extremely long time.

Next, a third embodiment of the saw blade according to the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. The blade of the saw blade of this embodiment is the same as that of the second embodiment,
Blade part 2 formed by pressing a plate material such as a blade steel material
4 are two sheets. The blade forming portion 2 of the blade portion 24
Reference numeral 6 denotes a blade edge 28 which is overlapped with a shift of a half pitch so that the peaks and valleys at the tips of the blade edges 28 are opposite to each other. Furthermore, as shown in FIG. 7B, the saw blade forming and polishing surfaces 32 are overlapped so that they face each other facing inward. Thus, the object can be cut with a certain width like a saw tooth.

Therefore, the saw blade of this embodiment can be used in the same manner as a saw, and can also be used for processing large woods and the like and wood processing machines. In the case of this embodiment, the polishing of the saw blade forming polishing surface 32 is performed by the two blade portions 24.
Are separately separated and polished once.

According to the saw blade of this embodiment, the blade portion 24 formed in the shape of a saw blade can be used in a manner similar to that of a saw. When the blade becomes round and the sharpness decreases, the saw blade formation polishing surface 3
If 2 is polished at once with a polisher or the like, the blade edge 28 is regenerated into a sharp saw blade shape due to the triangular wave shape of the blade forming portion 26.
Regeneration of the blade is possible until the entire width of the blade forming portion 26 is completely used, and it is possible to use the blade for an extremely long time.

The shape of the blade of the saw blade according to the present invention can be set as appropriate, and the triangular-shaped blade forming portion can also be set with an appropriate shape and an appropriate length. The type and shape of the blade to which the saw blade-shaped blade is applied are not limited. For example, a blade forming portion may be provided outside the arc-shaped blade portion, and the blade forming portion may be linear. And curved.

[0017]

According to the saw blade of the present invention, a sharp blade can be easily regenerated by uniformly polishing the polished surface on which the saw blade is formed. Moreover, the polishing operation is only required to match the abrasive to the saw blade-formed polishing surface, and is extremely simple, so that the polishing time can be greatly reduced and the polishing accuracy can be increased. Furthermore, the ridge-and-valley-shaped blade forming portion is formed to be wide in the width of the blade portion of the blade, so that the range that can be worn is wide and re-polishing enables long-term repeated use.

[Brief description of the drawings]

FIG. 1 is a front view of a saw blade according to a first embodiment of the present invention.

FIG. 2 is a rear view of the saw blade according to the first embodiment of the present invention;

FIG. 3 is a partially enlarged plan view (a), a cross-sectional view along the line AA (b), and a cross-sectional view along the line BB (c) of the blade portion of the saw-shaped blade of FIG. 1;

FIG. 4 is a front view of a saw blade according to a second embodiment of the present invention;

FIG. 5 is a rear view of the saw blade according to the second embodiment of the present invention;

FIG. 6 is a partially enlarged plan view (a), a cross-sectional view taken along the line CC (b), and a cross-sectional view taken along the line DD (c) of the blade portion of the saw-shaped blade of FIG.

FIG. 7 is a partially enlarged plan view (a), a longitudinal sectional view (b), and a transverse sectional view (c) of a blade portion of a saw blade-shaped blade according to a third embodiment of the present invention.

[Explanation of symbols]

 10 Sickle 12 Handle part 14,24 Blade part 16,26 Blade formation part 18,28 Blade edge 20 Back 22,32 Saw blade formation polishing surface

Claims (3)

[Claims] 1. A blade forming portion having a substantially triangular wave shape in a longitudinal cross section of the blade is formed at a predetermined width toward a blade edge on at least one surface of a plate member on which the blade is formed. Characterized in that the blade edge is provided by a blade-formed polishing surface formed obliquely to the surface of the plate material. 2. A saw blade according to claim 1, wherein said blade forming portion is formed by molding a plate material so that a cross section of said blade in a longitudinal direction has a triangular wave shape. 3. The saw blade-shaped cutting tool according to claim 2, wherein the blade formed by molding the plate material is overlapped and fixed to each other such that the peaks and valleys of the blade edge are alternated.