JP7208674B2 - cutlery - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade having a blade with a wavy cutting edge.

Conventional blades of this type include, for example, kitchen knives for cutting bread and rotary mechanical blades (see Patent Document 1, for example).

The cutting edge portion of the kitchen knife described in Patent Document 1 is formed with a continuous wavy cutting edge, a so-called wavy edge. The corrugations are composed of a series of arcuate recesses.

Japanese Patent Application Laid-Open No. 2001-190864

By the way, in a cutting tool having such a wavy edge, the angle of the blade is made relatively large so as not to chip the cutting edge when forming a plurality of concave blades constituting the wavy edge. Further, as the angle of the blade is increased, the unevenness of each concave blade in the thickness direction of the kitchen knife is increased. Therefore, when cutting an object, that is, when moving the cutting edge, there is a problem that the contact area with the object increases and the frictional resistance tends to increase.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cutting tool that has a wavy cutting edge and is capable of reducing frictional resistance when cutting an object.

A blade for achieving the above object comprises a blade body having two opposite surfaces and a wavy cutting edge. At least one surface of the blade body has a flat portion and an inclined portion that is inclined with respect to the flat portion and constitutes a part of the blade edge. A plurality of concave blades constituting a part are arranged side by side.

According to the same configuration, compared to the conventional configuration in which a plurality of concave blades are provided in the flat portion itself without having the inclined portion, the angle of the blade at the portion between the adjacent concave blades is small. Become. This reduces the unevenness of each concave blade in the thickness direction of the blade body. Therefore, when cutting an object, that is, when moving the cutting edge, the contact area with the object is reduced, and the frictional resistance is reduced. Therefore, it is possible to reduce frictional resistance when cutting an object while having a wavy cutting edge.

In the blade described above, it is preferable that the plurality of concave blades include a plurality of types of concave blades having mutually different shapes or sizes.

According to this configuration, by appropriately setting the arrangement pattern of the plural types of concave blades, the frictional resistance when cutting the object can be freely set.

In the blade described above, the blade preferably constitutes a kitchen knife.

According to this configuration, the kitchen knife can have a wavy edge while reducing frictional resistance when cutting an object.

ADVANTAGE OF THE INVENTION According to this invention, the frictional resistance at the time of cutting an object can be made small, while having a wavy cutting edge.

The top view of the kitchen knife which concerns on one Embodiment. The top view which expands and shows the principal part of FIG. FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2; FIG. 2 is a plan view corresponding to FIG. 1 and showing a state immediately before forming an inclined portion; The top view which expands and shows the principal part of the kitchen knife based on a modification. (a) is a plan view and (b) is a plan view showing a state immediately before forming an inclined portion of a kitchen knife according to another modification. The top view of the rotary blade for food processors which concerns on a modification.

1 to 4, an embodiment in which the knife according to the present invention is embodied as a kitchen knife for cooking will be described.

As shown in FIG. 1, the kitchen knife 10 includes a long plate-shaped blade 11 and a handle 18 provided at the base end of the blade 11 . The blade 11 has a tapered shape with a smaller width toward the tip. The blade body 11 is made of a steel plate such as a stainless steel plate. The blade 11 has a first surface 13 and a second surface (not shown) located opposite to each other.

Hereinafter, the longitudinal direction of the knife 10, the width direction of the knife 10, and the thickness direction of the knife 10 will be simply referred to as the longitudinal direction, the width direction, and the thickness direction.

As shown in FIGS. 1 and 2, a wavy cutting edge 12 is provided on one side edge of the blade body 11 in the width direction.

As shown in FIG. 2 , the first surface 13 of the blade body 11 has a flat portion 14 and an inclined portion 15 that is inclined with respect to the flat portion 14 and forms part of the cutting edge 12 . The flat portion 14 extends over substantially the entire length of the blade body 11 . The flat portion 14 extends from the base end of the cutting edge 12 to the edge of the blade body 11 on the side opposite to the one side in the width direction.

A plurality of concave blades 16 forming a part of the cutting edge 12 are arranged side by side in the longitudinal direction on the inclined portion 15 .

The multiple concave blades 16 include multiple types of concave blades 16A and 16B having mutually different shapes and sizes. The plurality of concave blades 16 include a first concave blade 16A and a second concave blade 16B smaller in both width direction size and longitudinal size than the first concave blade 16A. In this embodiment, the first concave blades 16A and the second concave blades 16B are alternately provided in the longitudinal direction.

Next, a method for manufacturing the kitchen knife 10 will be described.

The manufacturing method, as shown in FIG. 4, first includes a step of forming a wavy cutting edge 22 on the first surface 13 of the blade body 11 on which the inclined portion 15 is not formed.

The cutting edge 22 includes a first recessed edge 26A, a first recessed edge 26A, and a second recessed edge 26B smaller in both width direction and longitudinal dimension than the first recessed edge 26A. In this embodiment, the first concave blades 26A and the second concave blades 26B are provided alternately.

Next, in the manufacturing method, each trough portion P1 adjacent to the flat portion 14 in the first concave blade 26A, and each peak forming the cutting edge 22 in the portion 27 between the first concave blade 26A and the second concave blade 26B A step of removing a portion of the flat portion 14, the first concave blade 26A and the second concave blade 26B by grinding along the virtual plane V including the portion P2. Thereby, the inclined portion 15 is formed.

Next, the operation of this embodiment will be described.

The kitchen knife 10 of this embodiment and a conventional kitchen knife are compared. The kitchen knife shown in FIG. 4 does not have the inclined portion 15, and has a structure in which a plurality of concave blades 26A and 26B are provided on the flat portion 14 itself. can be done. As shown in FIG. 3, in the kitchen knife 10 of this embodiment, the blade angle α at the portion 17 between the adjacent recessed blades 16 is smaller than that of the conventional kitchen knife indicated by the two-dot chain line. As a result, the unevenness of each concave blade 16 in the thickness direction of the blade body 11 is reduced. Therefore, when cutting an object, that is, when moving the cutting edge 12, the contact area with the object is reduced, and the frictional resistance is reduced.

Next, the operation and effects of this embodiment will be described.

(1) The first surface 13 of the blade body 11 has a flat portion 14 and an inclined portion 15 that is inclined with respect to the flat portion 14 and forms a part of the cutting edge 12 . A plurality of concave blades 16 forming a part of the cutting edge 12 are arranged side by side on the inclined portion 15 .

According to such a configuration, since the action described above is achieved, it is possible to reduce the frictional resistance when cutting an object while having the wavy cutting edge 12 .

(2) The multiple concave blades 16 include multiple types of concave blades 16A and 16B having mutually different shapes and sizes.

According to such a configuration, it is possible to freely set the frictional resistance when cutting the object by appropriately setting the arrangement pattern of the plurality of types of concave blades 16A and 16B.

<Change example>
For example, the above-described embodiment can be modified and implemented as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- The arrangement pattern of the 1st concave blade 16A and the 2nd concave blade 16B can be changed suitably. For example, as shown in FIG. 5, two second concave blades 16B may be arranged between the first concave blades 16A.

- In the above-described embodiment and its modification, the plurality of concave blades 16 includes two types of concave blades 16A and 16B having mutually different shapes and sizes. It may include a concave blade.

- The shape of the plurality of concave blades 16 may include only one type of concave blade. In this case, for example, a concave blade 16 as shown in FIG. 6(a) may be used. Even in this case, as in the above-described embodiment, first, as shown in FIG. The blade edge 22 is composed of a plurality of concave blades 26 having the same shape and size. Next, along a virtual plane V including each valley P1 adjacent to the flat portion 14 in the concave blade 26 and each mountain portion P2 that becomes the cutting edge 22 in the portion between the concave blades 26, the flat portion 14 and A part of the concave blade 26 is removed by grinding. Thereby, the inclined portion 15 is formed.

In the above embodiment, the first surface 13 of the blade body 11 is provided with the inclined portion 15 forming the cutting edge 12, but the inclined portion 15 is also provided on the second surface opposite to the first surface 13. good too. Further, a plurality of concave blades forming part of the cutting edge may be provided on the inclined portion 15 provided on the second surface.

- The cutlery according to the present invention is not limited to kitchen knives. For example, the present invention can be applied to rotary blades of food processors. As shown in FIG. 7, the rotary blade 30 has an annular attachment portion 38 having an insertion hole 38a into which the rotating body is inserted, and a blade body 31 extending from the attachment portion 38. As shown in FIG. The blade body 31 has a wavy cutting edge 32 . The first surface 33 of the blade body 31 has a flat portion 34 and an inclined portion 35 that is inclined with respect to the flat portion 34 and forms a part of the cutting edge 32 . A plurality of concave blades 36 forming part of the cutting edge 32 are arranged side by side on the inclined portion 35 . The plurality of concave blades 36 includes first concave blades 36A and second concave blades 36B having mutually different shapes and sizes.

10... Kitchen knife (cutlery)
DESCRIPTION OF SYMBOLS 11... Blade body 12... Cutting edge 13... First surface 14... Flat part 15... Inclined part 16... Concave blade 16A... First concave blade 16B... Second concave blade 17... Portion 18... Handle 22... Cutting edge 26... Concave blade 26A First concave blade 26B Second concave blade 27 Portion 30 Rotating blade 31 Blade body 32 Cutting edge 33 First surface 34 Flat portion 35 Inclined portion 36 Concave blade 36A First concave blade 36B Second concave blade

Claims (3)

A blade having two opposite faces and a blade having a wavy cutting edge,
At least one surface of the blade body has a flat portion and an inclined portion that is inclined with respect to the flat portion and constitutes a part of the cutting edge,
A plurality of concave blades forming a part of the blade edge are arranged side by side on the one surface,
The inclined portions are planar, extend to the cutting edge in intermediate portions between the concave blades adjacent to each other, and are provided in the intermediate portions adjacent to each other in the direction in which the plurality of concave blades are arranged. and
The length of the inclined portion in each of the intermediate portions in the direction in which the plurality of concave blades are arranged gradually decreases toward the blade edge, and is the smallest at the blade edge position.
Cutlery. The inclined portion is provided in all the intermediate portions,
The knife according to claim 1. 1. A method of manufacturing a knife comprising a blade having two opposite faces and a wavy cutting edge, the method comprising the steps of:
a step of forming the wavy cutting edge by forming a plurality of concave blades adjacent to each other on at least one surface of the blade body;
When the portion other than the concave blade on the one surface is the flat portion,
Along a virtual plane including valleys adjacent to the flat portion of the concave blade and mountain portions forming the cutting edge in a portion between the concave blades adjacent to each other, the flat portion and the concave blade forming an inclined portion that is inclined with respect to the flat portion and constitutes a part of the cutting edge by removing a portion;
How to make cutlery.

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