Cutting board

Abstract

To equalize as much as possible feeling transmitted to a user, when a load is applied thereto, regardless of orientation of a kitchen knife or the like.SOLUTION: Multiple cardboards 31, 32 are laminated and loaded as a middle material 30 so that a formation direction of wave-shaped parts thereof 31a, 32a are intersected, in a gap part 2 between a first plate member 10 and a second plate member 20. Therefor, no matter which direction a kitchen knife or the like touches the surface of the first plate member 10 or the second plate member 20, the way of deformation of the cardboards 31, 32 is stable, and feeling transmitted to a user is stabilized regardless of orientation of the kitchen knife or the like or orientation or the like of a chopping board.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a cutting board.

Background Art

[0002] Patent Document 1 discloses a cutting board in which the inner surfaces of upper and lower polypropylene plates having a concave cross section with a thickness of about several millimeters face each other, and the peripheral wall portions of both are joined. An example in which corrugated cardboard is disposed as an intermediate material is described in the gap between the opposing inner surfaces of the upper and lower plates. The cutting board as shown in Patent Document 1 has the advantages that it is lightweight and easy to handle, and can be manufactured at low cost, as compared with a thick wooden or synthetic resin plate having a thickness of, for example, 10 mm or more. Further, when compared with a cutting board made of a synthetic resin plate having a predetermined thickness, the one filled with corrugated cardboard of Patent Document 1 has upper and lower plates of about several millimeters and can be bent when a load is applied. Further, since the corrugated cardboard serves as a cushion, the feeling that a kitchen knife in contact with the cutting board bounces back is small, and the blade hits well and there are few cases where the food remains uncut and connected.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As shown in Patent Document 1, corrugated cardboard is suitable as the core material used in such cutting boards because it is lightweight and low-cost. Usually, the corrugated cardboard is a single sheet with a thickness corresponding to the height of the gap between the upper and lower plates. The upper and lower plates made of polypropylene or the like that cover the corrugated cardboard are somewhat rigid and there is no significant difference during normal use. However, when cutting an object that requires a large force to be applied, there may be a difference in the feeling when applying force depending on the direction of the cutting board. That is, as in Patent Document 1, the upper and lower plates are made of polypropylene with a concave cross-section having a thickness of about several millimeters. When a load is applied, the upper plate bends to some extent, and accordingly, the corrugated cardboard undergoes a deformation such that it sinks in. These bends and deformations are usually slight and there is no significant difference. However, depending on the direction of the kitchen knife with respect to the cutting board, the amount of bending, the amount of deformation, or the range of deformation, etc., may change slightly, and this may be transmitted as a difference in the feeling received by the user when applying force.

[0005] Also, a cutting board is usually formed in a rectangular shape and is often used with its long side facing the user. However, the direction of the kitchen knife with respect to the cutting board is not necessarily constant and may be perpendicular to the long side, diagonal, or used in a direction substantially parallel to the long side.

[0006] The present invention has been made in view of the above, and an object thereof is to provide a cutting board that can make the feeling transmitted to the user when a load is applied as uniform as possible regardless of the direction of a kitchen knife or the like.

Means for Solving the Problems

[0007] In order to solve the above-described problems, in the present invention, It has a first plate member and a second plate member made of synthetic resin with a concave cross-section and having a peripheral wall portion, and they are combined with the inner surfaces of the flat portions surrounded by the peripheral wall portion facing each other. A core material is loaded into the gap between the inner surfaces of the flat portions of the first plate member and the second plate member. Provide a cutting board characterized in that a plurality of cardboard sheets are stacked and loaded such that the forming directions of their corrugated portions intersect each other.

[0008] Preferably, the cardboard is plastic cardboard. Preferably, there are two cardboard sheets, and they are stacked such that the forming directions of the corrugated portions of each intersect at approximately right angles. When the first plate member and the second member are combined with their inner surfaces of the flat portions facing each other, they preferably have a protruding portion that protrudes outward from the peripheral wall portion, and one side surface, the other side surface, and the outer surface of the protruding portion in the vertical direction are covered and integrated with a flexible synthetic resin edge member. Preferably, the cardboard is a recycled product.

Advantages of the Invention

[0009] According to the present invention, a plurality of cardboard sheets are stacked and loaded as an intermediate material in the gap between the first plate member and the second plate member such that the forming directions of their corrugated portions intersect each other. If there is only one cardboard sheet, or if multiple sheets are stacked but the forming directions of the corrugated portions are the same, the way the cardboard deforms when a kitchen knife or the like contacts it along the forming direction of the corrugated portion is different from when it contacts in a direction intersecting the forming direction of the corrugated portion. As a result, the amount and range of deflection of the first plate member or the second plate member change, and the feeling transmitted to the user's hand changes.

[0010] In contrast, according to the present invention, since the cardboard sheets are stacked such that the forming directions of their corrugated portions intersect each other, no matter in which direction a kitchen knife or the like contacts the surface of the first plate member or the second plate member, the way the cardboard deforms is stable, and the feeling transmitted to the user is also stable regardless of the direction of the kitchen knife, the direction of the cutting board, or the position where the kitchen knife or the like is used on the cutting board (the position where food is placed on the cutting board).

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

MODE FOR CARRYING OUT THE INVENTION

[0012] Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, the cutting board 1 of the present embodiment is configured to include a first plate member 10, a second plate member 20, and an intermediate member 30.

[0013] The first plate member 10 and the second plate member 20 are formed of a synthetic resin. The synthetic resin is not limited, and examples thereof include polypropylene and polyethylene. Polypropylene, which has relatively high heat resistance and excellent mechanical strength, is preferable.

[0014] The first plate member 10 and the second plate member 20 are formed in a concave cross-sectional shape having flat portions 11 and 21 of a predetermined area and peripheral wall portions 12 and 22 rising from the periphery thereof (see FIGS. 4(a) and 4(b)). In the present embodiment, both are formed in a rectangular shape in plan view, but this is merely an example, and various shapes such as a square, a trapezoid, an ellipse, and a circle can be adopted according to the use and design.

[0015] As shown in FIGS. 4(a) and 4(b), projecting portions 13 and 23 that project outward are formed on the peripheral wall portions 12 and 22, respectively. In the present embodiment, the projecting portion 13 of the peripheral wall portion 12 of the first plate member 10 is formed on one long side 1a and both short sides 1c and 1d near the one long side 1a, and the projecting portion 23 of the peripheral wall portion 22 of the second plate member 20 is formed on the other long side 1b and both short sides 1c and 1d near the other long side 1b. That is, each of the projecting portions 13 and 23 is formed at a target position across the center line X along the longitudinal direction of the first plate member 10 and the second plate member 20.

[0016] When the inner surfaces 11a and 21a of the respective flat portions 11 and 21 of the first plate member 10 and the second plate member 20 face each other, the first plate member 10 and the second plate member 20 are combined in such a direction that the projecting portions 13 and 23 are in target positions across the center line X. As a result, the projecting portions 13 and 23 exist substantially over the entire circumference of the cutting board 1. In order to be able to easily combine the first plate member 10 and the second plate member 20 in this way, a plurality of guide projections 12e and 22e that project outward are formed on the peripheral wall portions 12 and 22 in the range where the projecting portions 13 and 23 are not formed, and correspondingly, guide groove portions 13e and 23e with which the guide projections 12e and 22e engage are formed in the projecting portions 13 and 23. Therefore, if the guide projections 12e and 22e are engaged with the guide groove portions 13e and 23e, the two can be easily combined.

[0017] The first plate member 10 and the second plate member 20 are combined so that the projecting portions 13 and 23 exist over the entire circumference, and an edge member 40 is provided to cover all of one side surface 13a, 23a, the other side surface 13b, 23b, and the outer side surface 13c, 23c in the vertical direction of the projecting portions 13 and 23 and is integrated (see FIG. 5). The edge member 40 is made of a flexible synthetic resin such as a thermoplastic elastomer and is integrated with the projecting portions 13 and 23 by injection molding or the like. By forming the edge member 40 from a thermoplastic elastomer, a non-slip function is achieved when the cutting board 1 is placed on a cooking table or the like.

[0018] When combining the first plate member 10 and the second plate member 20, the intermediate material 30 is loaded into the gap 2 between the opposing inner surfaces 11a and 21a of the respective flat portions 11 and 21. For the intermediate material 30, a plurality of (two in this embodiment) corrugated papers (corrugated paper sheets) 31 and 32 are used. The corrugated papers 31 and 32 may be made of paper, but plastic corrugated paper is preferable from the viewpoint of durability. Also, from the viewpoints of energy saving and environmental protection, it is preferable to use recycled products for the corrugated papers 31 and 32.

[0019] As shown in FIGS. 2(a), (b) and FIG. 5, the corrugated papers 31 and 32 are laminated and disposed in the gap 2. At this time, they are laminated so that the formation directions of the respective corrugated portions 31a and 32a sandwiched between the upper and lower liners 31b and 31b or 32b and 32b intersect. In this embodiment, one corrugated paper 31 is formed such that a straight line 31c along each top portion 31a1 of the corrugated portion 31a is parallel to the long sides 1a and 1b, and the other corrugated paper 32 is formed such that a straight line 32c along each top portion 32a1 of the corrugated portion 32a is parallel to the short sides 1c and 1d (see FIGS. 2 and 3). Thereby, when the two corrugated papers 31 and 32 are laminated, the straight lines 31c and 32c along the respective top portions 31a1 and 32a1 of the corrugated portions 31a and 32a intersect at a substantially right angle. In this specification, the formation direction of each corrugated portion 31a and 32a refers to the direction of the straight lines 31c and 32c along the respective top portions 31a1 and 32a1 of the corrugated portions 31a and 32a.

[0020] According to this embodiment, for example, the first plate member 10 is used as the upper surface and the second plate member 20 is used as the lower surface. Food is placed on the first plate member 10 and cut with a kitchen knife. At this time, in this embodiment, since the two corrugated papers 31 and 32 are arranged such that the formation directions of the corrugated portions 31a and 32a intersect, preferably intersecting at a substantially right angle as in this embodiment, the deformation modes of the two corrugated papers 31 and 32 when a load is applied by the kitchen knife are substantially the same whether the direction of the kitchen knife is along the formation direction of the corrugated portion 31a of one corrugated paper 31 or, conversely, along the formation direction of the corrugated portion 32a of the other corrugated paper 32.

[0021] That is, when the corrugated cardboard is a single sheet and the forming direction of the corrugated portion is only in one direction as in the prior art, when the knife is abutted against the cutting board along this forming direction and when the knife is abutted in a direction substantially perpendicular thereto, the way of deforming the corrugated cardboard (the amount of deformation and the range of deformation accompanying compression) changes. As a result, the way of bending (the amount of bending and the range of bending) of the first plate member 10 covering the upper surface thereof changes. However, as in the present embodiment, by arranging the two corrugated cardboards 31 and 32 in the gap portion 2 so that the forming directions of the corrugated portions 31a and 32a intersect, regardless of the direction of the knife, when a load is applied by abutting against the upper surface of the first member 10, there is no significant difference in the way of deforming the corrugated cardboards 31 and 32. As a result, the way of bending of the first member 10 also becomes stable.

[0022] Therefore, as for the reaction force transmitted to the user's hand and the feeling such as the blade contact, there is almost no difference depending on the direction of the knife or the direction of the cutting board, and the usability is improved. In addition, since the difference in the feeling of use depending on the direction of the knife or the cutting board is reduced, the degree of freedom in the shape of the cutting board is also increased, which can contribute to an improvement in design.

[0023] (Test Example) 1. Specimen (a) to (c) three types of specimens were laminated to form one test piece. Each test piece was rectangular, with an average width (length along the short side) of 44 mm, an average length (length along the long side) of 89 mm, and an average thickness of 10 mm. (a): A rectangular polypropylene plate (PP plate) with a thickness of 2 mm (corresponding to the first plate member 10 and the second plate member 20), (b): A rectangular plastic corrugated cardboard with a thickness of 3 mm and the forming direction of the corrugated portion along the short side (vertical Pradan) (c): A rectangular plastic corrugated cardboard with a thickness of 3 mm and the forming direction of the corrugated portion along the long side (horizontal Pradan)

[0024] 2. Test Method With reference to "JIS K7171:2016 Method for Obtaining Plastic Flexural Properties", a three-point bending test was performed under the following conditions, and the results were obtained according to "9 Calculation and Expression of Test Results" and "9.1 Flexural Stress" of the same standard. Testing machine: Universal material testing machine UCT-500 manufactured by Orientec Co., Ltd. Load cell: 1 kN Testing environment: 23°C, 50% RH Sample installation status: Refer to Figure 6 Radius of the support base corner: 5 mm, Distance between fulcrums: 50 mm Radius of the tip of the indenter: 5 mm Testing speed: 10 mm / min, Number of test cycles: 5 (The results are rounded to three significant figures of the average value.) The test pieces are stacked in the following order from the bottom · Test piece 1: PP plate, vertical Pradan, vertical Pradan, PP plate · Test piece 2: PP plate, horizontal Pradan, horizontal Pradan, PP plate · Test piece 3: PP plate, vertical Pradan, horizontal Pradan, PP plate

[0025] 3. Test results · Bending stress of test piece 1: 4.01 MPa · Bending stress of test piece 2: 4.22 MPa · Bending stress of test piece 3: 4.08 MPa

[0026] 4. Discussion From the test results, for test piece 1 with two layers of vertical Pradan stacked, since the formation direction of the corrugations is along the width direction (depth direction in Figure 6) at the tip of the indenter, the bending stress is the smallest. For test piece 2 with two layers of horizontal Pradan stacked, since the formation direction of the corrugations is perpendicular to the width direction (depth direction in Figure 6) at the tip of the indenter, the bending stress is the highest On the other hand, test piece 3 in this embodiment, which is a laminate of vertical Pradan and horizontal Pradan, showed a value between that of test piece 1 and test piece 2

[0027] From the results of test piece 1 and test piece 2, when the formation directions of the corrugations 31a, 32a of the corrugated boards 31, 32 are the same, differences in bending stress occur depending on the direction of the knife and the direction of the cutting board. If the direction of the knife and the direction of the cutting board during use are not fixed, depending on the load when the knife contacts the cutting board, it may affect the usability such as the feel of the blade contact In contrast, in the test piece 3 of the present embodiment, since the formation directions of the corrugated portions of the vertical blade and the horizontal blade are orthogonal to each other, the bending stress is almost the same as described above even when the direction of the pressure element is different by 90 degrees, and it can be seen that the difference in the feeling of use depending on the direction of the kitchen knife or the cutting board is reduced.

[0028] Note that the cutting board of the present invention is not limited to the above embodiment. For example, as shown in Patent Document 1, at least one of the first plate member 10 and the second plate member 20 is formed of a transparent or translucent material, and a sheet decorated with a pattern, characters, etc. is interposed in the middle material 30 so that these decorations appear on the surface. It can also be configured.

Explanation of reference numerals

[0029] 1 Cutting board 1a, 1b Long sides 1c, 1d Short sides 2 Gap 10 First plate member 11 Flat part 11a Inner surface 12 Peripheral wall part 13 Protrusion 20 First plate member 21 Flat part 21a Inner surface 22 Peripheral wall part 23 Protrusion 30 Middle material 31, 32 Cardboard 31a, 32a Corrugated part 40 Edge member

Claims

1. It has a first plate member and a second plate member made of synthetic resin with a concave cross-section and having a peripheral wall portion, and the inner surfaces of the flat portions surrounded by the peripheral wall portion are combined in a state of facing each other. An intermediate material is loaded into the gap between the inner surfaces of the flat portions of the first plate member and the second plate member. As the intermediate material, a plurality of corrugated papers, each of which is configured such that a corrugated portion is sandwiched between upper and lower liners, are stacked and loaded. The plurality of corrugated papers are stacked such that the liners of adjacent corrugated papers in the stacking direction are in contact with each other, and the forming directions of the corrugated portions of each corrugated paper intersect. A cutting board characterized by this.

2. The cutting board according to claim 1, wherein the corrugated paper is plastic corrugated paper.

3. The cutting board according to claim 1 or 2, wherein there are two corrugated papers, and they are stacked such that the forming directions of the corrugated portions intersect at a substantially right angle.

4. When the first plate member and the second member are combined with the inner surfaces of the flat portions facing each other, they have a protruding portion that protrudes outward of the peripheral wall portion, and one side surface, the other side surface, and the outer surface in the vertical direction of the protruding portion are covered and integrated with a flexible synthetic resin edge member. The cutting board according to any one of claims 1 to 3.

5. The cutting board according to any one of claims 1 to 4, wherein the corrugated paper is a recycled product.

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