JPH0221871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cutting blade for use in mowing machines for mowing lawns, plants, tea picking, etc., and other agricultural mowing machines.

[Conventional technology]

In recent years, mechanization has significantly developed in the fields of horticulture and agriculture, and most of the tasks that were previously done manually using scissors and the like have now been mechanized.

As such, there is a mowing machine used for lawns, plants, tea picking, etc., and Fig. 6 and Fig. 7 show an example of a cutting blade related to this conventional example. The mowing blade 10 according to the above includes a movable blade 14 having a serrated blade part 13 formed on the side thereof on a fixed blade 12 having a serrated blade part 11 formed on the side thereof. Place it so that 13 is in contact with it,
By reciprocating the movable blade 14 by a drive source (not shown) and moving the cutting blade 10 in the direction of arrow a or b (hereinafter referred to as the traveling direction) in the figure, the movable blade 14 is moved between the serrated blade parts 11 and 13. The object to be cut, such as plants and trees, was being cut. Here, the object to be cut refers to plants, etc. before being cut by the cutting blade, and the cutting object described below refers to plants, etc. after being cut by the cutting blade.

In addition, to explain this mowing blade 10 in more detail, as shown in FIG. 6, a vertically elongated hole 15 is bored in the center of the movable plate part 14a that constitutes the movable blade 14, and a vertical hole 15 is bored in the upper part of the movable plate part 14aa. A mounting plate 16 is provided with a hole (not shown) of a predetermined size, and a bolt 17 fixed to the fixed plate portion 12a constituting the lowermost fixed blade 12 is inserted into the vertical hole 15. The movable blade 14 and the adhered plate 16 pass through the hole provided in the adhered plate 16, and the fixed blade 12 is attached with a wing nut 18 at the upper part so that the movable blade 14 can move in the vertical direction. installed on.

On the other hand, a long hole 20 is provided in the base end 19 of the movable blade 14.
As is well known, the movable blade 14 is configured to reciprocate in the vertical direction by inserting an eccentric rotation pin rotated by a drive source (not shown) into the elongated hole 20.

However, in the above-mentioned cutting blade 10, when the cutting blade 10 is moved in the direction a shown in FIG. Since the cutting blade 10 gets caught in the blade base 21 of the blade, it is necessary to immediately raise the cutting blade 10 and move it again in the direction a, which causes unevenness on the cutting surface and also causes the cutting blade 10 to be pulled when moving the cutting blade 10 in the direction a. It has become a resistance. Furthermore, the movable blade 14
Since the serrated blade part of is angled, the movable blade 14
Due to the reciprocating motion of the cutting blade 10, the object to be cut is thrown outward (in the direction opposite to the direction a) and escapes from the cutting blade, making it difficult to cut smoothly. It was becoming a resistance.

Therefore, some cutting blades have been proposed in which the fixed plate portion of the fixed blade is formed above the upper plane of the serrated blade portion of the fixed blade.

[Problem that the invention attempts to solve]

However, if the vegetation to be cut stands perpendicular to the direction of movement of the cutting blade, the cutting blade 10 according to the above-mentioned conventional example can cut it without any problem; There was a problem in that it was difficult to cut with conventional cutting blades when the blade was approximately parallel to the direction.

The present invention was developed in view of the above circumstances, and aims to provide a mowing blade that is easy to use and causes less fatigue by actively lifting up fallen plants and guiding them toward the blade.

[Means for solving problems]

The mowing blade according to the present invention, which achieves the above purpose, includes a fixed blade having a fixed plate part and a plurality of serrated blade parts formed on the side of the fixed plate part in parallel to the cutting direction, and a movable cutting blade. By bringing the serrated blades of a movable blade comprising a plate part and a plurality of serrated blade parts formed parallel to the cutting direction on the side of the movable plate part into contact with each other and intersecting each other, A mowing blade for cutting an object to be cut, wherein the serrated blade part of the movable blade is made longer than the serrated blade part of the fixed blade, and the elongated part of the serrated blade part is bent diagonally upward or diagonally downward. It is made up of:

Here, in the fixed blade and the movable blade, the respective blades are both linear and the movable blade moves reciprocatingly, and the fixed blade and the movable blade are both circular and the movable blade rotates. This also includes those that exercise. In particular, for those in which the fixed blade and the movable blade are linear, in addition to those in which the serrated blade is formed on both sides of the fixed plate and the movable plate, the serrated blade is formed on both the fixed plate and the movable plate. This also includes those attached only to one side of the plate.

[Effect]

When the movable blade is reciprocated or rotated by a drive source such as a motor or engine, and a workpiece is inserted between the serrated blade part of the fixed blade and the serrated blade part of the movable blade, the movable blade The serrated portion of the blade is longer than the serrated portion of the fixed blade, and its tip is bent diagonally upward or diagonally downward, so the object to be cut is cut due to the reciprocating or rotational movement of the serrated portion of the movable blade. is repelled by the inner bent part, pushed from the cutting edge toward the cutting base, and is cut by the intersection of the serrated blade of the fixed blade and the serrated blade of the movable blade.

In particular, even when cutting plants that are approximately parallel to the direction of movement of the mowing blade, the tip of the serrated blade of the movable blade is bent diagonally, so the plants may get caught on this and cut the plants. Since it is sent from the cutting edge to the cutting edge, it is possible to cut.

〔Example〕

Next, embodiments embodying the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

Here, FIG. 1 is a partial perspective view of a cutting blade according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along arrow B-B in FIG. 1, and FIG. Partial perspective view of the fixed blade in the cutting blade according to the embodiment, No. 4
The figure is a plan view of a cutting blade according to a second embodiment of the present invention, and FIG. 5 is a sectional view taken along the line C--C in FIG. 4.

As shown in FIGS. 1 to 3, the cutting blade 22 according to the first embodiment of the present invention includes a fixed blade 23 which is linear, and a movable blade 24 which is in contact with the fixed blade 23 and swings thereon. It's getting more familiar.

Although the mechanism for reciprocating the movable blade 24 is not shown, it has a similar structure to the reciprocating mechanism of the cutting blade 10 according to the conventional example shown in FIG. 6 described above. The mowing blade 22 will be explained in detail below.

The fixed blade 23 has a central fixed plate part 25 and a plurality of serrated blade parts 26 formed on the sides thereof. The blade portion 26 is located above the upper plane 28, and the lower portions 29 on both sides of the fixing plate portion 25 in the portion where the serrated blade portion 26 is not provided are also located above the upper plane 28. , fixed blade 2
3 and the movable blade 24, the cut object at the lower part passes smoothly under the fixed blade 23.

The movable blade 24 has a movable plate part 30 and a serrated blade part 31 formed on the side of the movable plate part 30, and the movable plate part 31 has a trapezoidal shape and has a lower fixed plate part. It is in contact with 25. A vertically elongated hole 32 is provided approximately in the center of the movable plate portion 31, through which a bolt (not shown) fixed to the fixed plate portion 25 passes through, thereby maintaining a state of contact between the fixed blade 23 and the movable blade 24. I'm starting to do that.

On the other hand, a serrated blade portion 3 is provided on the side of the movable plate portion 30.
This serrated blade portion 31 is longer than the serrated blade portion 26 of the fixed blade 23 described above, and its tip 32 is bent diagonally downward.

Thereby, by reciprocating the movable blade 24, it becomes possible to feed the object to be cut toward the blade base.

In the above embodiment, the tip of the movable blade 24 is bent diagonally downward, but it is also possible to bend it diagonally upward.

Next, FIG. 4 and FIG. 5 show a cutting blade 22c according to a second embodiment of the present invention, and the difference from the above embodiment is that both the fixed blade 23c and the movable blade 24c are circular blades. It is a point. In this case as well, the cutting blade 22c
The basic configuration is the same as the mowing blade 22 described above, but the tip 32c of the movable blade 24c is bent diagonally upward to guide fallen plants toward the blade in the direction of travel. In use, by rotating the movable blade 24c, the serrated blade portion 26c of the fixed blade and the serrated blade portion 31c of the movable blade 24c intersect.

In the mowing blade 22c shown in FIGS. 4 and 5, the fixed blade 23c also includes one in which the circular blade located at the bottom can be freely rotated without being driven to rotate. By making the fixed blade 23c freely rotatable in this way, it becomes possible to change the position of the serrated blade portion of the fixed blade 23c depending on the object to be cut.

In addition, the fixed blade and movable blade can be divided into circles (for example, 1/3
As in the second embodiment, the present invention is also applicable to a mowing blade in which the serrated blade portion of the fixed blade and the serrated blade portion of the movable blade intersect by rotating the movable blade back and forth. Of course it will be done.

[Effect of idea]

As described above, in the mowing blade according to the present invention, the serrated blade part of the movable blade is longer than the fixed blade part, and the elongated tip is bent diagonally upward or diagonally downward. Even if there are plants that have fallen parallel to the direction, they will be caught by the bent tip and sent from the cutting edge towards the base, making it possible to cut the entire area smoothly.

Therefore, mowing can be performed with even less uncut material than with conventional cutting blades.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of a cutting blade according to a first embodiment of the present invention, and FIG. 2 is a view taken along arrow B-B in FIG.
3 is a partial perspective view of the fixed blade in the cutting blade according to the first embodiment of the present invention, FIG. 4 is a plan view of the cutting blade according to the second embodiment of the present invention, and FIG. 5 4 is a sectional view taken along the line CC in FIG. 4, FIG. 6 is a perspective view of a conventional cutting blade, and FIG. 7 is a sectional view taken along the line AA in FIG. Explanation of symbols, 22, 22c...Mowing blade, 23,
23b, 23c... Fixed blade, 24, 24c... Movable blade, 25... Fixed plate part, 26, 26c... Serrated blade part, 28... Upper plane, 30... Movable plate part, 3
1, 31c... Serrated blade portion, 32, 32c... Tip portion.

Claims (1)

[Claims for Utility Model Registration] (1) A fixed blade having a fixed plate portion and a plurality of serrated blade portions formed on the sides of the fixed plate portion in parallel to the cutting direction; and a movable plate. and a plurality of serrated blades formed on the side of the movable plate part in parallel to the cutting direction. A mowing blade for cutting an object, wherein the serrated blade part of the movable blade is longer than the serrated blade part of the fixed blade, and the elongated part of the serrated blade part is bent diagonally upward or diagonally downward. A cutting blade characterized by: (2) Registration of a utility model in which both the fixed blade and the movable blade are disk-shaped, and when the movable blade rotates, the serrated blade part of the fixed blade intersects with the serrated blade part of the movable blade. A cutting blade according to claim 1. (3) A utility model registration request in which the fixed blade and the movable blade are both linear and the movable blade reciprocates, so that the serrated blade part of the fixed blade intersects with the serrated blade part of the movable blade. The cutting blade described in item 1 of the range.