JP7402571B1 - Wave blade knife and how to sharpen wave blade knives - Google Patents

Abstract

An object of the present invention is to easily sharpen a wavy knife while maintaining the wavy blade shape. A wave-blade knife 10 includes a blade 11 having a wave-shaped cutting edge 14, a first surface 12 connected to the cutting edge 14, and a second surface 13 located on the opposite side of the first surface 12, respectively. The first surface 12 has a plurality of concave blades 17 arranged in the direction in which the cutting edge 14 extends. The second surface 13 is provided along the periphery of the second surface 13 including the cutting edge 14 and is a portion surrounded by the flat portion 20 and the flat portion 20 located on the same plane. It has a concave portion 21 which is concave. [Selection diagram] Figure 4

Description

The present invention relates to a wavy knife and a method for sharpening a wavy knife.

There is a wave blade knife as a knife for cutting bread or frozen food (for example, see Patent Document 1).
Such a wave-blade knife includes a blade having a wave-shaped cutting edge, a first surface connected to the cutting edge, and a second surface located on the opposite side of the first surface. A plurality of concave blades arranged in the extending direction of the cutting edge are formed on the first surface. A mountain portion is formed between adjacent concave blades.

Japanese Patent Application Publication No. 2001-190864

One possible method is to sharpen such a wave-blade knife using, for example, a sharpener for sharpening Western-style knives. However, in this case, the tips of the peaks are gradually scraped off. This causes problems in that the wave blade shape collapses and the cutting edge angle changes.

Another possible method is to sharpen the concave blades one by one using a file. However, in this case, there is a problem in that it is difficult to align the blade angles among the plurality of concave blades.

Each aspect of a wave blade knife and a method for sharpening a wave blade knife to solve the above problems will be described.
[Aspect 1]
The blade has a wave-shaped cutting edge, a first surface that is continuous with the cutting edge, and a second surface that is located on the opposite side of the first surface, and the first surface has a plurality of recesses arranged in the extending direction of the cutting edge. The second surface has a blade, and the second surface is a flat portion located on the same plane and provided along the periphery of the second surface including the cutting edge, and a portion surrounded by the flat portion, and the second surface is a portion surrounded by the flat portion. A wave-blade knife having a concave part that is concave relative to the part.

According to the same configuration, a plurality of concave blades are provided on the first surface of the blade. Further, the second surface of the blade is provided with a flat portion and a recessed portion. For this reason, for example, by grinding parallel to an unused flat surface with the flat surface on the edge side in surface contact with the flat surface of the whetstone, the flat surface on the blade edge side can be scraped off uniformly. . Thereby, the cutting edge of each concave blade can be returned to a sharp state while maintaining the wavy blade shape. In this way, a wave-blade knife can be easily sharpened by only sharpening the flat part on the cutting edge side. Therefore, the wavy knife can be easily sharpened while maintaining the wavy blade shape.

[Aspect 2]
The wavy blade knife according to aspect 1, wherein the length of the concave blade in the width direction of the blade is greater than the length of the flat part from the cutting edge to the recess in the width direction of the blade.

When the second surface of a wave-blade knife is repeatedly sharpened, the length of the concave blade in the width direction of the blade gradually becomes smaller. Once the concave blade is gone, the wave blade knife cannot be sharpened any more.

According to the above configuration, since the length of the concave blade in an unused state can be increased, the life of the wavy blade knife can be extended.
[Aspect 3]
The first side is
having a peak located between the adjacent concave blades,
the concave blade and the mountain portion extend parallel to each other;
The wavy blade knife according to aspect 1 or aspect 2.

According to the same configuration, the concave blade and the peak portion extend parallel to each other. Therefore, by sharpening the flat portion, the cutting edge of each concave blade can be returned to a sharp state while maintaining its unused shape.

[Aspect 4]
A method for sharpening a wave-blade knife according to any one of aspects 1 to 3, comprising: sharpening the flat part on the cutting edge side in a state in which the flat part on the cutting edge side is in surface contact with a flat surface of a whetstone; How to sharpen a knife.

According to this method, the flat part can be easily sharpened parallel to the unused flat part. Therefore, it is possible to easily achieve the same effects as the wave-blade knife according to any one of aspects 1 to 3.

According to the present invention, a wavy knife can be easily sharpened while maintaining the wavy blade shape.

FIG. 1 is a side view showing the first surface of a wave-blade knife of one embodiment. FIG. 2 is a side view showing the second surface of the wave-blade knife of FIG. 1. FIG. 3 is a side view showing an enlarged part of the cutting edge of FIG. 1. FIG. FIG. 4 is a sectional view showing a method of sharpening the wave-blade knife of FIG. 1. FIG. 5 is a side view showing a modified example of the wave-blade knife.

One embodiment will be described below with reference to FIGS. 1 to 4. In this embodiment, a wave blade knife 10 for right-handed users will be described.
As shown in FIGS. 1 and 2, the wave blade knife 10 includes a blade 11, a base 31, and a handle 32.

The blade 11 has a wave-shaped cutting edge 14, a first surface 12 that is continuous with the cutting edge 14, and a second surface 13 that is located on the opposite side of the first surface 12. A peak portion 15 is provided on the opposite side of the blade 11 from the cutting edge 14 in the width direction W (vertical direction in FIGS. 1 to 3).

The blade 11 has a tip portion 22 and a jaw portion 23. The tip portion 22 is located at the tip of the blade 11 in the longitudinal direction L (left-right direction in FIGS. 1 and 2). The jaw portion 23 is located at the proximal end of the cutting edge 14 in the longitudinal direction L.

The blade 11 is formed by punching out a steel plate with a predetermined thickness using a press machine.
<Second side 13>
As shown in FIG. 2, the second surface 13 has a flat portion 20 and a recessed portion 21.

The plane portion 20 is provided along the periphery of the second surface 13 including the cutting edge 14 and is located on the same plane. The plane portion 20 is a so-called back pressing portion. The plane portion 20 is provided over the entire length of the blade 11 in the longitudinal direction L.

The recessed portion 21 is a portion surrounded by the flat portion 20 and is recessed with respect to the flat portion 20. The recessed portion 21 is a so-called back gap portion. The recess 21 extends to the base end of the blade 11 in the longitudinal direction L.

<First page 12>
As shown in FIG. 1, the first surface 12 has a flat portion 16, a concave blade 17, and a peak portion 18.
The flat portion 16 extends over the entire length of the blade 11 in the longitudinal direction L.

A plurality of concave blades 17 are arranged in the extending direction of the cutting edge 14, that is, in the longitudinal direction L of the blade 11. The concave blade 17 has an arc-shaped cutting edge 14.
The peak portion 18 is located between adjacent concave blades 17.

The concave blade 17 and the peak portion 18 extend parallel to each other.
As shown in FIG. 3, the concave blade 17 of this embodiment includes a first concave blade 17A and a second concave blade 17B. The length of the second concave blade 17B in the longitudinal direction L is smaller than the length of the first concave blade 17A in the longitudinal direction L. Two second concave blades 17B are arranged side by side between adjacent first concave blades 17A.

As shown in FIG. 4, the length of the concave blade 17 in the width direction W of the blade 11 is preferably greater than the length of the flat portion 20 from the cutting edge 14 to the recess 21 in the width direction W of the blade 11.
Next, a method for sharpening the wave-blade knife 10 and the effects of this embodiment will be explained.

As shown in FIG. 4, by grinding the flat part 20 parallel to the unused flat part 20 with the flat part 20 on the cutting edge 14 side in surface contact with the flat surface 91 of the whetstone 90, 4, the flat portion 20 on the side of the cutting edge 14 is uniformly scraped off. Thereby, as shown by the two-dot chain line in FIG. 3, the cutting edge 14 of each concave blade 17 can be returned to a sharp state while maintaining the wave blade shape.

Next, the effects of this embodiment will be explained.
(1) The first surface 12 has a plurality of concave blades 17 arranged in the direction in which the cutting edge 14 extends. The second surface 13 is provided along the periphery of the second surface 13 including the cutting edge 14 and is a portion surrounded by the flat portion 20 and the flat portion 20 located on the same plane. It has a concave portion 21 which is concave.

According to such a configuration, the above-mentioned effect is achieved, so that the corrugated knife 10 can be easily sharpened by only sharpening the flat portion 20 on the cutting edge 14 side. Therefore, the wavy knife 10 can be easily sharpened while maintaining the wavy blade shape.

Further, by simply adding a step of forming the recess 21 on the second surface 13 to the existing manufacturing process of the wavy blade knife, it is possible to manufacture the wavy knife 10 that can achieve the above effects.

(2) The length of the concave blade 17 in the width direction W of the blade 11 is greater than the length of the flat portion 20 from the cutting edge 14 to the recess 21 in the width direction W of the blade 11.
When the second surface 13 of the wave-blade knife 10 is repeatedly sharpened, the length of the concave blade 17 in the width direction W of the blade 11 gradually becomes smaller. When the concave blade 17 disappears, the wavy knife 10 can no longer be sharpened.

According to the above method, since the length of the concave blade 17 in an unused state can be increased, the life of the wavy blade knife 10 can be extended.
(3) The first surface 12 has a peak portion 18 located between adjacent concave blades 17. The concave blade 17 and the peak portion 18 extend parallel to each other.

According to this configuration, since the concave blades 17 and the peaks 18 extend parallel to each other, by sharpening the flat portions 20, the cutting edge 14 of each concave blade 17 can be maintained in its unused shape. You can return it to a sharp state.

(4) Sharpen the flat part 20 with the flat part 20 on the cutting edge 14 side in surface contact with the flat surface 91 of the grindstone 90.
According to such a method, the flat part 20 can be easily sharpened parallel to the unused flat part 20. Therefore, the same effects as (1) to (3) can be easily achieved.

<Example of change>
The above embodiment can also be modified and implemented, for example, as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- As shown in FIG. 5, an inclined surface 19 that is inclined with respect to the flat part 16 may be provided between the concave blade 17 and the peak part 18 and the flat part 16. In this case, after producing the wavy blade knife 10 of the above embodiment, the sloped surface 19 may be formed by scraping off the base end portions of the concave blade 17 and the peak portions 18. Such an inclined surface 19 can reduce the contact area between the wave blade knife and the object when cutting the object, thereby reducing frictional resistance, that is, improving sharpness.

- The length of the concave blade 17 in the width direction W of the blade 11 may be equal to or less than the length of the flat part 20 from the cutting edge 14 to the recess 21 in the width direction W of the blade 11.
- The method of sharpening the flat part 20 is not limited to using the flat surface 91 of the grindstone 90. In short, any material that can sharpen the flat part 20 parallel to the flat part 20 in an unused state may be used.

10...Wave blade knife 11...Blade 12...First surface 13...Second surface 14...Blade edge 15...Peak portion 16...Flat portion 17...Concave blade 17A...First concave blade 17B...Second concave blade 18...Mountain portion 19 ... Inclined surface 20 ... Plane part 21 ... Concave part 22 ... Tip part 23 ... Jaw part 31 ... Mouthpiece 32 ... Handle 90 ... Grindstone 91 ... Plane

Claims (2)

A blade having a wave-shaped cutting edge, a first surface that is connected to the cutting edge, and a second surface located on the opposite side of the first surface,
The first side is
a plurality of concave blades lined up in the extending direction of the blade edge;
a mountain portion located between the adjacent concave blades and formed only by the inner surfaces of the concave blades;
The concave blade and the mountain portion extend parallel to each other,
The second surface is
a flat part provided along the periphery of the second surface including the cutting edge and located on the same plane;
a recessed part that is a part surrounded by the flat part and is recessed with respect to the flat part,
The length of the concave blade in the width direction of the blade is greater than the length of the flat part from the cutting edge to the recess in the width direction of the blade.
Wave blade knife. A method for sharpening a wavy knife according to claim 1,
sharpening the flat part on the cutting edge side in a state in which the flat part on the cutting edge side is in surface contact with the flat surface of the grindstone;
How to sharpen a wave knife.

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