JPH02185212A - Chopping board - Google Patents

Abstract

PURPOSE:To prevent the generation of warp even in the case of use for a long period and to obtain a sanitary and rigid chopping board by providing a core material excellent in bending elasticity and rigidity relatively to a chopping board material between the chopping board material made of a wood and the chopping board material made of the material different from the wooden board. CONSTITUTION:A wooden chopping board material 1 is stuck on the edge surface of one side of a core material 3, and a non-wooden chopping board material 2 is stuck on the edge surface of the other side. The core material 3 has the rigidity relatively to the chopping board materials 1 and 2, and since the chopping board material are firmly stuck to it, the chamber and twist due to the expansion and contraction of the chopping board material can be effectively prevented. When the core material is composed of plural wooden plates, by arranging and sticking them so that the grains of the respectively adjoining wooden plates can be mutually crossed at right angle, the generations of not only the bending in the width direction of the chopping board but also the camber in a length direction are suppressed. For the core material, an arbitrary FRP forming matter can be used, it is insertingly provided and stuck in the intermediate part of the wooden chipping board material 1 and the non-wooden chopping board material 2 such as the synthetic resin, and the chipping board to be immune from warp, bend and twist can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cutting board for cooking, which has one side made of a wooden board and the other side made of a different material (including resin-impregnated wood, etc.). The present invention relates to the structure of a multilayer cutting board.

[Prior Art] Conventionally, cutting boards for cooking have a wooden veneer structure and are widely used. A wooden veneer structure like this is light and has a good blade height, making it easy to use, and is good when you are cooking vegetables, etc., but when you are cooking fish or meat, etc. The problem was that juices and other liquids entered through the narrow grooves carved by the knife blade and the cuts across the board due to capillary action, leaving behind odors and becoming a source of bacteria.

Cutting boards made of synthetic resin, etc. have been manufactured since around the 1950s, and are widely used as they have excellent hygiene benefits due to their good drying properties. However, such synthetic resin cutting boards are heavy and slippery, and the synthetic resin and the knife blade do not necessarily fit well.
It has problems such as being difficult to handle.

In this way, wooden cutting boards and synthetic resin cutting boards each have their advantages and disadvantages, and it is best to use synthetic resin cutting boards for cooking things such as fish and meat, and wooden ones for vegetables, etc., or to avoid the inconvenience and use only one. In many cases, this was done either by using

In order to deal with this problem, many cutting boards with a two-layer structure in which the front plate and the back plate are made of different materials, for example, a two-layer cutting board made of wood and non-wooden material such as synthetic resin, have been proposed. Figures 21 to 24 show examples of the prior art.
This is the structure of a cutting board described in the 27236 publication. Second
Figure 1 is a perspective view of a cutting board with a two-layer structure in which the front plate 51 and the back plate 52 are made of different materials and the front and back plates are bonded together in a flat manner, and Figure 22 is taken along line a''a in Figure 21. 23 is a perspective view of a cutting board with a two-layer structure in which a front plate 51 and a back plate 52 made of different materials are fitted, and FIG. 24 is a sectional view taken along the line b-b in FIG. 23. However, the conventional technology also has the following problems, and the reality is that it has not been possible to achieve practical use.

[Problem to be Solved by the Invention 1] Most of the prior art techniques involve joining a wooden board and a non-wooden board made of synthetic resin with an adhesive, as shown in the above-mentioned conventional example, or mechanically using various fitting structures. Since it was formed by a bonding method, the following problems occurred.

(1) Due to the difference in linear expansion coefficient between wood and synthetic resin, the cutting board warps and twists mainly due to expansion and contraction due to temperature changes in the synthetic resin.

(2) Wood swells when wet and contracts when dry, but non-wood does not swell or contract when it absorbs moisture or dries.

Therefore, when a cutting board gets wet, the wet surface of the wood expands vertically and horizontally even if the water does not penetrate inside, but the synthetic resin does not expand, but rather shrinks as it is cooled by the water. Therefore, it curves toward the synthetic resin side.

(3) Stress due to the elongation and contraction of the synthetic resin and stress due to wood swelling and contraction constantly act on the bonding surface between the wood and the synthetic resin, and furthermore, the bonding force between the wood and the synthetic resin decreases due to water wetting of the wood. The adhesive surface is likely to peel off.

(4) In the case of a cutting board formed by fitting wood and synthetic resin together without bonding, in addition to warping as described in (1) and (2) above, sewage may seep into the gap between the fitting parts. It's unsanitary.

As described above, even if an attempt is made to simply join wood and non-wood, the difference in properties between the two will result in significant warping or easy separation. Furthermore, even if they are fitted together without adhesive, they will similarly warp significantly, and waste water will seep into the gap between the fitting parts, making it unsanitary and, in any case, impractical for practical use.

The present invention solves these problems and makes it possible to arrange wooden boards and boards made of materials other than wood, such as resin-treated wood boards or synthetic resins, on the front and back sides, which could not be achieved conventionally, without causing warping or peeling. The purpose is to provide a cutting board that is not available.

[Means for Solving the Problem] As described in the claims, the means for achieving the above object includes a core material made of at least one plate-like material, and a core material formed on one side of the core material. This cutting board is characterized by having a wooden board and a board made of a material different from that of the wooden board attached to the other side.

The present invention provides a core material having excellent bending elasticity and rigidity relative to the cutting board material between a wooden cutting board material and a cutting board material made of a material different from the wooden board material, thereby improving the elasticity and rigidity. Stretching of a different cutting board material attached to both the front and back sides,
This prevents warpage, bending, twisting, etc. caused by swelling and contraction.

Hereinafter, the present invention will be described in detail based on examples.

[Example] Figures 1 and 2 are diagrams showing basic examples of the present invention, in which a wooden cutting board l was attached to one end surface of the core material 3, and a non-wooden cutting board material 2 was attached to the other end surface. This is an example of a cutting board. FIG. 1 is a perspective view of a cutting board to which each plate material is attached, and FIG. 2 is a perspective view of each cutting board material and core material before attachment. The core material 3 is relatively rigid with respect to the cutting board material 1.2, and since the cutting board material is firmly adhered to it, warping and twisting due to expansion and contraction of the cutting board material is effectively prevented.

Figures 3 to 5 show examples of core materials used in the present invention. Figure 3 is a perspective view of a core material made of one wooden board, Figure 4 is a perspective view of a core material made of two wood boards, and Figure 5 is a perspective view of a core material made of two wood boards. The figure is a perspective view of a core material made of four wooden boards. In Figures 1 to 5, 4.34.441
．． 442.541.542.543.544 is wood grain, 3
．． 33.431432.531532.533.534
is the core material.

Generally, when a board gets wet, it does not expand vertically or horizontally, but expands more in the direction perpendicular to the wood grain 4 than in the direction of the wood grain 4. Therefore, when the core material 33 is made of a single wooden board as shown in FIG. 3, it is arranged so that the direction of the grain of the wooden board serving as the core material 33 intersects at right angles with the direction of the grain of the wooden cutting board material 1 on the surface. This can prevent the entire cutting board from curving. When the core material consists of multiple wooden boards as shown in Figures 4 and 5, the grains of the adjacent wooden boards are arranged and pasted at right angles to each other, so that the width of the cutting board is This prevents not only curvature but also warpage in the length direction.

For comparison testing, a cutting board with the following specifications was manufactured as a cutting board corresponding to the above example.

Experimental example 1: (1) Use a spruce wood board with a thickness of 7 mm as the core material, with the grain direction facing the width direction of the wooden cutting board, (2) Spruce wood with a thickness of 15 mm on one side. Arrange the wooden boards with the grain direction facing the longitudinal direction of the cutting board (almost perpendicular to the grain direction of the core material), and (3) the other side is a 3 mm thick low-density polyethylene board. (4) Each layer is integrated with epoxy adhesive to create a total thickness of 25 m.
I obtained a "chopping board" of m.

Figures 6 to 8 are diagrams showing core materials used in other embodiments, and are FR
This is an example in which the core material is composed of a P plate alone or an FRP molded product. Fig. 6 shows an example in which a single FRP board is used as the core material, 603 is a plate-like FRP core material, and Fig. 7 is a reticulated material FR.
A perspective view of P core material 703, FIG. 8 is a planar FRP core material 8
03 is a perspective view. In this example, the core material is FRP.
By constructing this structure, warping of the cutting board can be effectively prevented by utilizing the bending elasticity and rigidity of FRP. The FRP core material can be a plate, net, or sheet made by impregnating a cloth, mat, or fibers aligned in one direction with a resin and hardening them. Any FRP molded product, such as a hollow body, can be used, and this is inserted and pasted into the middle part of the wooden cutting board material 1 and the non-wooden cutting board material 2, such as synthetic resin, to prevent warping, bending, and twisting. The key is to get a strong cutting board. It is also effective to fill the internal space of the planar body or hollow body with a lightweight material such as plastic foam.

A cutting board with the following specifications was manufactured as one corresponding to this example.

Experimental Example 2: (1) A 2 mm thick FRP board made by laminating 4 carbon fiber woven fabrics and impregnating and hardening them with epoxy resin was used as the core board, (2) A 20 mm thick subrus material was used on one side of the core board. (3) On the other side, a 3mm thick low-density polyethylene plate is placed, a scale is printed on the side that is attached to the core material, and white paint is applied over the entire surface. After coating, each layer is glued and integrated to form a scale with visible scales from the surface with a total thickness of 25 mm.
I got a cutting board.

It is also possible to use a metal plate or metal molding for the core material.
It is possible to prevent the cutting board from warping by utilizing the bending elasticity and rigidity of metal plates, metal moldings, and the like.

In yet another embodiment, a molded product made of FRP or metal having a tubular or rod shape is used as the core material, and the core material is piped in a direction perpendicular to the direction of the grain of the wooden cutting board. By arranging and pasting the rods in the longitudinal direction, it is possible to effectively prevent the cutting board from warping by utilizing the rigidity of the tubular body and the rod-shaped body in the longitudinal direction. A cutting board with the following specifications was manufactured as an equivalent to such an example.

Experimental example 3: Assuming that a metal tube is used as the core material, (1) outer diameter of 5 m
Aluminum pipe 86 with an inner diameter of 4 mm and a length of 210 mm.
Arrange the books with their bodies touching each other to use as a core material. (The outer dimensions of this core material are 210 mm x 430 mm.) (2) The outer periphery of the core material has a thickness of 5 mm and a side width of 5 mm.
Attach a polyethylene low foam frame to the same dimensions as the cutting board (i.e. 220 mm x 440
It becomes mm. ) (3) A polyethylene plate with a thickness of 3 mm is placed on one side of the front and back sides, (4) A spruce material with a thickness of 17 mm is placed on the other side, and each layer is glued together to form a cutting board with a total thickness of 25 mm. Obtained.

FIG. 9 is a diagram showing still another embodiment, in which the shape of the core material is not a horizontal plate. The shapes of the core materials used in each of the above examples were all flat plates, but by changing the shape of these core materials into curved, convex, or concave shapes, it was possible to further improve the shape of the core materials. It has increased bending rigidity and the ability to suppress warping of the cutting board. Figure 9 shows core material 9
03 is a perspective view of the cutting board when the wooden cutting board material 901 is curved concavely only in the width direction. Even if the outer core material is curved only in the longitudinal direction, the core material can be further curved in both the width direction and the longitudinal direction, that is, in a spherical shape.

Figures 10 to 12 show a cutting board in which a peripheral edge fitting material made of a water-returning thin plate or the like is attached to the entire peripheral edge or a partial edge of the cutting board. Figure 10 shows a thin plate 1 as a peripheral attachment made of a water-repelling material such as plastic on the side of the entire peripheral edge of the cutting board.
06 is attached, and FIG. 11 is a top view thereof. FIG. 12 shows an example in which a water-returning thin plate 126 is attached to the end of the cutting board in a direction perpendicular to the grain 124 of the cutting board. Both prevent water adsorption from the sides of the wooden cutting board, which prevents the cutting board from warping, reduces the drying time of the wooden cutting board, and maintains good sanitary conditions. In addition, by preventing the adhesive surfaces of the cutting board material and the core material from getting wet, a strong adhesive state can be maintained and peeling can be prevented. The above effect can also be obtained by providing a thin film such as waterproof paint as a peripheral attachment.

Figures 13 and 14 show examples in which the core material is recessed from the periphery of the cutting board material. Since the core material 133 is recessed from the periphery of the wooden cutting board material 131 and the synthetic resin (non-wooden) cutting board material 132, it is easy to catch the fingers and is convenient for handling such as turning the material inside out.

FIG. 15 shows an example in which a core material 153 is recessed from the periphery of a wooden cutting board material 151 and a synthetic resin cutting board material 152, and a filler material 157 such as synthetic resin is provided in the recessed gap. This prevents the core material from getting wet and deteriorating, and protects the adhesive surface to improve durability.

16 to 19 are cross-sectional views showing an example in which at least the adhesive surface of the wooden cutting board is smaller than the area of the core material in the adhesive surface between the wooden cutting board material and the core material. 161,
171.181.191 is wooden cutting board material, 163.17
3.183.193 is core material, 162.172.182.
192 is a non-wooden cutting board material. The area of the surface of the core material facing the wooden cutting board material is configured to be larger than the area of the adhesive surface of the wooden cutting board material, which is effective in suppressing warping of the wooden cutting board material.

FIG. 20 shows an example in which a thin film is interposed between the adhesive layer between the cutting board material and the core material. In this example, a soft thin film 207 of synthetic resin is interposed between the adhesive layer between the cutting board materials 201 and 202 and the core material 203 to relieve the peeling stress applied to the adhesive interface and improve the adhesive strength between the adhesive layers.

[Comparative Experiment] A water immersion comparison test was conducted between the cutting boards of each of the above experimental examples and a cutting board made by simply pasting a wooden board and a synthetic resin board as a comparison example, and the warpage was compared. Got the results. All of them demonstrate the superiority of the embodiments of the present invention.

The cutting board of the comparative example listed in Table 1 has a thickness of 22 m.
It is made by bonding a spruce material of 3 mm thick and a polyethylene plate of 3 mm thick together with an epoxy resin, and has a width of 220 mm, a length of 440 mm, and a thickness of 25 mm.

The numerical values listed in Table 1 indicate the distance between the line connecting both ends of each cutting board and the position of the surface of the board at the center of the cutting board, measured at the center of each cutting board in the width and length directions. are all mm.

[Effects of the Invention] According to the present invention, as explained in detail in the above examples and its excellent effects were demonstrated by conducting comparative tests, warping can be avoided even during long-term use, which was previously considered difficult. It becomes possible to obtain a sanitary and robust cutting board having a laminated structure of a wooden cutting board material and a non-wooden cutting board material without causing any damage. In addition, the cutting board obtained in this way is lightweight and thin, and any surface with different properties can be used at will, so there is no need to prepare multiple cutting boards, and it has many advantages such as being easy to use. .

[Brief explanation of the drawing]

Figures 1 to 5 are diagrams showing examples of the present invention, in which Figure 1 is a perspective view of a cutting board with each plate material pasted, Figure 2 is a perspective view of each cutting board material and core material before pasting, FIG. 3 is a perspective view of a core made of one wood board, FIG. 4 is a perspective view of a core made of two wood boards, and FIG. 5 is a perspective view of a core made of four wood boards. Figures 6 to 8 are diagrams showing core materials of other embodiments.
The figure is a perspective view of the plate-shaped FRP core material, and Figure 7 is the net-shaped FR.
A perspective view of a P core material, and FIG. 8 is a perspective view of a planar FRP core material. FIG. 9 shows an example in which the shape of the core material is not a horizontal plate. FIGS. 1O to 12 are diagrams showing embodiments of the structure of the peripheral edge of the cutting board. Figures 13 and 14 show an example in which the core material is recessed from the periphery of the cutting board material, and Figure 15 shows a filling material provided in the gap where the core material is recessed from the periphery of the cutting board material. 16 to 19 are cross-sectional views showing examples in which the adhesive surface of the wooden cutting board and the core material is smaller than the area of the opposing surface of the core material, respectively. It is. FIG. 20 is a sectional view of an embodiment in which a thin film of synthetic resin is interposed between the adhesive layer between the cutting board material and the core material. 21 to 24 are diagrams showing examples of the prior art. ■...Wooden cutting board material, 2...Non-wooden cutting board material, 3...Core material, 4...--Wood grain number
1 Representative Patent Attorney Takao Yoshizawa Figure 2 Figure 6 Figure 7 Kakaku 5 Servant Figure 8 Figure 9 Figure 0 Figure 6 Figure 8 Figure 8 1 3 Figure 14 Figure 15 Figure 20 Figure 2 Figure 22 Procedural amendment (voluntary) April 4, 1990

Claims (1)

[Claims] 1. A core material made of at least one plate-like material, a wooden board attached to one side of the core material, and a board made of a material different from the wooden board attached to the other side. A cutting board characterized by: 2. The cutting board according to claim 1, wherein the shape of at least one side of the core material is not flat in some or all regions.