JPH0642429Y2 - Hammer knife - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a hammer knife for cutting grass and the like.

(Prior Art) Conventionally, in a grassy place such as a golf course or an embankment, as shown in FIG. 6, a holder 101 welded to a rotary shaft is used.
A hammer knife is attached so that it can freely rotate in the front-back direction, the shaft rotates at high speed, and grass is cut.

The hammer knife is used until the tip is worn out and disappears. As the hammer knife is used, the blades will gradually wear out and the sharpness of grass etc. will deteriorate.

The poorer the sharpness of the grass, the worse the finish.

As a conventional technique, there is a technique disclosed in Japanese Utility Model Laid-Open No. 56-52904, but the aim is to improve the durability of the blade, but the maintenance of the cutting property is not mentioned.

If the blade originally wears, it will not be lost the function of the hammer knife until the blade body is exhausted by re-grinding the blade and using it while forming a new blade, but the trouble of installation and removal and the Not done due to economics such as price.

Therefore, according to this invention, it is possible to maintain the cutting performance without re-polishing the blade portion and increasing the cutting resistance even if the blade body is worn.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention is directed to a hammer knife having a plate shape, in which a groove along the blade portion is formed in the cutting blade body, and the groove is formed. The cross section was provided with a portion that gradually deepened toward the blade.

(Operation) When the blade gradually wears, new blades are sequentially formed.

Therefore, the cutting resistance can be reduced without performing re-polishing.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a hammer knife according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1 when the tip direction is bent, and FIG. 3 is a straight line.

The hammer knife is a holder of the rotating shaft as shown in FIG.
Often, two pieces are attached to 101.

The hammer knife has a plate-like shape, and there are two types, one in which the tip portion 9 is bent appropriately in the lateral direction with respect to the rotation direction of the hammer knife, and one in which the tip portion is straight.

As shown in FIGS. 1 and 4, on one side surface of the hammer knife, a plurality of grooves (two grooves in this embodiment) 5 along the blade portion 4 are provided at appropriate intervals from the blade edge 3 side, 7 are formed. However, it may be one article.

It may be partial. The grooves 5 and 7 are formed by the same inner inclined surfaces 6 and 8 as the blade portion 4 and the notch in the blade thickness direction of the blade body 4.

Next, the operation of the above embodiment will be described.

Explaining the cutting action of this hammer knife, it begins to wear from the blade portion 4 of the blade edge 3 and gradually progress. When the blade portion 4 wears to 4 in FIG. 4 due to the progress of wear, an inner inclined surface 6 forming the next groove 5 appears, and the inner inclined surface 6 has the same function as the blade portion 4. Furthermore, this inner inclined surface 6
When the wear occurs, the next inner inclined surface 8 functions like the blade 3. In this way, new blades are formed several times, cutting performance is maintained until the end of the life of the hammer knife, cutting resistance is reduced, and required horsepower is also reduced. The mounting method is the same as that of the conventional method as shown in FIG.

By forming a large number of grooves in the grooves 5 and 7, it is possible to maintain fine cutting performance.

Also in FIG. 5, since it is slightly recessed, some effects can be expected.

[Effect of the Invention] As is clear from the above description, according to the configuration of the present invention, the cutting performance can be maintained and the required horsepower can be reduced without re-polishing the blade portion.

[Brief description of drawings]

1 is a front view of a hammer knife according to an embodiment of the present invention, FIG. 2 is a curved side view, and FIG. 3 is a straight side view.
FIG. 4 is a side view of FIG. 1, FIG. 5 is a side view showing a state where the blade forming portion 10 has a concave portion, and FIG. 6 is a view showing an attached state. 1 …… Hammer knife 2 …… Hammer knife mounting hole 5, 7 …… Groove 101 …… Mounting holder 102 …… Collar 106 …… Rotating shaft

Claims (1)

[Scope of utility model registration request] 1. A hammer knife in which a blade portion is formed from a mounting portion toward a tip thereof, and a groove is formed along the blade portion, and the groove cross section is provided with a portion that gradually becomes deeper toward the blade portion. A hammer knife characterized by that.