JP7587834B2 - Cat claw grinder - Google Patents

Description

The present invention relates to a cat's claw polisher and grinder. More specifically, the present invention relates to a cat's claw polisher and grinder that can polish and grind a cat's claws at the same time.

Cats have the habit of sharpening their claws to remove the old outer layer of their claws. When a cat sharpens its claws, this is generally referred to as cat scratching or polishing its claws. As scratching is a habit of cats, when a cat is kept in an ordinary home, the cat will scratch the walls, pillars, furniture, etc. of the room, causing damage to said walls, etc.

In order to prevent cats from sharpening their claws on walls, pillars, furniture, etc. in a room, a cat claw sharpener has been proposed in recent years, in which, for example, the laminated cross section or wavy folded part of a laminated cardboard formed by laminating and gluing multiple sheets of corrugated cardboard serves as the sharpening part for the scratching tool, and the laminated cardboard is detachably stored in a case with the sharpening part exposed to the outside, and the case is provided with a paper piece storage part (see, for example, claim 1 of Patent Document 1).

However, even if the cat's claws can be sharpened using the cat scratch sharpener, it is not possible to grind down the sharp tips of the cat's claws, and therefore it is not possible to completely prevent the cat from scratching the walls, pillars, furniture, etc. in the room by scratching the said walls, etc.

Therefore, even if you use the cat scratcher, you need to clip your cat's claws separately from the scratcher. However, cats have a habit of disliking having their claws clipped, so if you try to clip your cat's claws forcibly, the cat may scratch or bite you, causing injury.

As a result, a cat claw sharpener with an abrasive has been proposed as a claw sharpener that can reduce the number of cat claws by sharpening them. The abrasive is applied to the underside of the material (laminated cardboard or linen fabric) and is sandwiched and fixed between a wooden board or a core such as laminated cardboard to sharpen the claws (see, for example, claim 1 of Patent Document 2).

However, as shown in Figs. 1 and 2 of Patent Document 2, the cat scratcher with abrasives is provided with laminated cardboard or linen fabric 4, abrasive material 2, wooden board or laminated cardboard 1, abrasive material 3, and laminated cardboard or linen fabric 5 in that order from the surface. Therefore, unless the cat scratches and tears the laminated cardboard or linen fabric 4, which is the surface layer, the abrasive material 2 built into the scratcher is not exposed to the outside, and the cat's claws cannot be sharpened under normal use. Even if the cat scratches and tears the laminated cardboard or linen fabric 4, which is the surface layer of the cat scratcher with abrasives, and the abrasive material 2 is exposed to the outside, the cat's paw pads (palms) and toes rub against the rough surface of the abrasive material 2, so the cat instinctively avoids the scratcher and stops using it.

Another cat scratcher has been proposed in which a cardboard sheet and a grit (sand) layer are layered in direct contact with each other (see, for example, Patent Document 3). FIG. 3 of Patent Document 3 shows a cat scratcher in which a cardboard sheet 25 made of a cardboard sheet 40 and a liner 30 is layered in direct contact with a grit (sand) layer 100 in which sand particles 150 are sandwiched between two backing sheets 110, and FIGS. 4 to 8 show a cat scratcher in which a sandpaper piece 160 with sand particles 180 attached to a backing sheet 170 is layered in between two liners 30.

However, in the cat scratch sharpener shown in Figures 4, 7 and 8 of Patent Document 3, the surface of the sandpaper piece 160 to which the sand particles 180 are attached is covered with the backing sheet 110, so the cat's claws cannot be sharpened efficiently. In the cat scratch sharpener shown in Figure 5, the surface of the sandpaper piece 160 to which the sand particles 180 are attached is covered with a sealing sheet 190, so the cat's claws cannot be sharpened efficiently. In the cat scratch sharpener shown in Figure 6, the surfaces of the paper pieces 160 to which the sand particles 180 are attached are stacked on top of each other, so the cat's claws cannot be sharpened efficiently.

In order to sharpen the cat's claws, it is possible to make the sandpaper pieces 160 protrude higher than the surface of the liner 30. However, if the sandpaper pieces 160 protrude above the surface of the liner 30, the protruding sandpaper pieces 160 will come into contact with the cat's paw pads, and the cat will not like the sandpaper pieces 160 coming into contact with its paw pads, and will stop using the cat's claw sharpener, meaning that the cat's claw sharpener will not be able to fully demonstrate its effect of sharpening the cat's claws.

In addition, in order to prevent the sandpaper pieces 160 from coming into contact with the pads of the cat's paws in the cat's claw sharpener, it is possible to stack the sandpaper pieces 160 and the liner 30 so that the sandpaper pieces 160 are flush with the liner 30, or to stack the sandpaper pieces 160 and the liner 30 so that the sandpaper pieces 160 are recessed from the surface of the liner 30. However, in either case, the cat's claws do not get caught in the sandpaper pieces, and the cat's claws cannot be sharpened efficiently.

Therefore, in recent years, there has been a strong demand for the development of a cat claw sharpening and grinding device that allows cats to sharpen their claws and grind their nail tips efficiently.

JP 2003-333951 A Utility Model Registration No. 3112443 US Patent Application Publication No. 2013/0206079

The present invention was made in consideration of the above-mentioned conventional technology, and aims to provide a cat's claw sharpening and grinding device that allows a cat to sharpen its claws and efficiently grind the tips of its nails.

The present invention relates to
(1) A cat's claw grinder having a grinding/grinding surface on its upper surface for grinding/grinding a cat's claws, the cat's claw grinder having a grinding member having a grinding surface on at least one side for grinding a cat's claws, and a core and a liner having a plurality of wave-shaped sides, the end face of the grinding member, the end face having the wave-shaped shape of the core, and the end face of the liner being formed on the upper surface of the cat's claw grinder, the grinding surface of the grinding member and the wave-shaped side of the core being adjacent to each other, a space being formed between the grinding surface of the grinding member and the wave-shaped side of the core, the grinding surface of the grinding member being present within the space, and the space being connected to the upper surface of the cat's claw grinder;
(2) The cat's claw polisher and grinder according to (1) above, which has a laminated cardboard made of a plurality of liners and a plurality of cores alternately stacked, and a grinding member is provided between the plurality of laminated cardboard in a direction perpendicular to the liners of the laminated cardboard.
(3) A cat's claw polisher/grinder as described in (1) above, in which a plurality of grinding members, a plurality of cores, and a plurality of liners are stacked in parallel, the side of the liners are in contact with the side of the core, and the grinding surfaces of the grinding members are in contact with the side of the core; and (4) a cat's claw polisher/grinder as described in (1) above, in which a plurality of grinding members, a plurality of cores, and a plurality of liners are stacked concentrically, the side of the liners are in contact with the side of the core, and the grinding surfaces of the grinding members are in contact with the side of the core.

The cat's claw sharpening and grinding device of the present invention has the excellent effect of allowing a cat to sharpen its claws and efficiently grind the tips of its nails.

1 is a schematic plan view showing one embodiment of a cat's claw sharpener and grinder of the present invention. FIG. 2 is a schematic enlarged view of the portion of the cat's claw filer and grinder shown in FIG. 1 enclosed by a circle X. FIG. 1 is a schematic diagram of a vertical cross section of the cat's claw polisher/grinder of the present invention, showing a location where a grinding member is inserted into a recess or through hole provided on the upper surface of a laminated cardboard. FIG. 1 is a schematic diagram of a longitudinal section of a portion of a cat's claw polisher/grinder according to the present invention where a grinding member is sandwiched between a laminated cardboard box and another laminated cardboard box; FIG. FIG. 2 is a schematic plan view showing another embodiment of the cat's claw polisher/grinder of the present invention. 6 is a schematic enlarged view of the portion surrounded by circle Y of the cat's claw filer/grinder of the present invention shown in FIG. 5 . FIG. 2 is a schematic plan view showing another embodiment of the cat's claw polisher/grinder of the present invention. FIG. 2 is a schematic explanatory diagram showing the state of the tips of the claws on a cat's front paws before and after using the cat's claw polisher/grinder of the present invention on the cat. 1 is a photograph, used as a substitute for a drawing, showing the top surface of the cat's claw file and grinder of the present invention after a cat has used the cat's claw file and grinder in Example 1 of the present invention. 1 is a photograph showing the claws of a cat's front paws after the cat has used the cat's claw filer and grinder of the present invention in Example 1 of the present invention.

The cat's claw polisher/grinder of the present invention is a cat's claw polisher/grinder having a polishing/grinding surface on its upper surface for polishing/grinding cat's claws, and has a grinding member having a grinding surface on at least one side for grinding cat's claws, a core having multiple wave shapes on its side, and a liner, the end face of the grinding member, the end face of the core having a wave shape, and the end face of the liner are formed on the upper surface of the cat's claw polisher/grinder, and a space is formed between the grinding surface of the grinding member and the side of the core, and the space is connected to the upper surface of the cat's claw polisher/grinder.

The cat's claw grinder/sharpener of the present invention utilizes the cat's habit of scratching the corrugated surface of the core of cardboard with their claws. When a cat scratches the top surface of the cat's claw grinder/sharpener of the present invention, the cat's claws can be ground by the end face of the grinding member present on the top surface of the cat's claw grinder/sharpener, the end face of the core, and the end face of the liner, and the cat's claws can enter the space between the grinding member and the core, grinding the cat's claw tips with the grinding surface of the grinding member present in that space.

Therefore, when the cat's claw grinder/sharpener of the present invention is used on a cat, the cat will grind its own claws and grind its nail tips, eliminating the need for a human to cut the cat's claws with nail clippers, which is a cumbersome task that cats dislike, and is therefore extremely useful for cat owners.

In the present invention, the upper surface of the cat's claw polisher/grinder is the surface (polishing/grinding surface) on which the cat polishes and grinds its claws. Polishing/grinding a cat's claws means polishing and grinding the cat's claws.

The upper surface of the cat's claw polisher/grinder of the present invention is formed with a polishing surface for polishing cat's claws. The polishing surface is formed by the end surface of the polishing member, the end surface of the corrugated core, and the end surface of the liner, which are present on the upper surface of the cat's claw polisher/grinder.

The grinding member has a grinding surface on at least one side for grinding the cat's claws. The grinding surface may be formed on only one side of the grinding member, or may be formed on both sides of the grinding member. From the viewpoint of efficiently grinding the cat's claws, it is preferable that the grinding surface is formed on both sides of the grinding member.

The grinding surface of the grinding member may be a surface to which an abrasive is attached, or may be a surface with irregularities that allow for grinding of a cat's claws.

Examples of the grinding member include a grinding member in which a grinding surface is formed by adhering an abrasive to a substrate, a metal file, etc. From the viewpoint of reducing the weight of the cat's claw grinder of the present invention, a grinding member in which an abrasive is adhered to a substrate is preferable.

Examples of abrasives used in the grinding member include natural abrasives such as sand, and artificial abrasives such as alumina particles and silicon carbide particles, but the present invention is not limited by the type of abrasive. The grain size of the abrasive is specified in R6010.

Examples of substrates used for the grinding members include paper, woven fabric, nonwoven fabric, wood boards, resin boards such as polyvinyl chloride resin, polyester, acrylic resin, and polypropylene, foamed resin (sponge) boards such as acrylic foam and polyurethane foam, rubber boards such as chloroprene rubber and styrene-butadiene rubber, and metal boards, but the present invention is not limited to these examples.

Examples of abrasive members include abrasive paper (sandpaper) specified in JIS R6252, which uses paper as the substrate; abrasive cloth (sandpaper) specified in JIS R6251, which uses cloth as the substrate; waterproof abrasive paper (waterproof (sand) paper) specified in JIS R6253; and abrasive members having an abrasive material (abrasive particles) attached to the surface of a substrate such as a wooden board, a resin board, a foamed resin (sponge) board, a rubber board, or a metal board, but the present invention is not limited to these examples. The abrasive member is preferably abrasive paper (sandpaper), abrasive cloth, or waterproof abrasive paper, and more preferably abrasive cloth or waterproof abrasive paper.

When using abrasives such as abrasive paper, abrasive cloth, or waterproof abrasive paper as the abrasive, the abrasive can be used in the following forms: an abrasive folded in half so that the surface to which the abrasive is attached is exposed to the outside; an abrasive folded in half with its inner surfaces bonded together with double-sided adhesive tape, adhesive, or the like; an abrasive folded in half with a base material having elasticity such as sponge or rubber, a reinforcing material such as a resin plate or cardboard sandwiched between the inner surfaces of the abrasive, and a laminated structure in which the abrasive and the reinforcing material are bonded together; an abrasive laminate in which an abrasive is bonded to one or both sides of a base material having elasticity such as sponge or rubber with double-sided adhesive tape, adhesive, or the like. A laminated structure in which an abrasive is bonded to one or both sides of an elastic base material has the advantage that the abrasive surface can easily capture the tip of a cat's claws. From the standpoint of efficiently polishing and grinding the cat's claws, it is preferable that the grinding member have a plate-like shape.

The roughness of the abrasive attached to the surface of the grinding member as specified in JIS R6010 is not particularly limited, but from the viewpoint of efficiently grinding and sharpening the cat's claws while not causing discomfort to the cat, it is preferably about 60 to 1000 grit, more preferably about 80 to 600 grit, and even more preferably about 100 to 240 grit.

The grinding member has a grinding surface on at least one side so that the cat's claws can be efficiently ground and polished by rubbing against the top surface of the cat's claw grinder. The grinding member may also have a grinding surface on its top surface. From the viewpoint of efficiently grinding and polishing the cat's claws even when the cat's claw grinder is used with the top and bottom directions reversed toward the flat surface of the cat's claw grinder, it is preferable that the grinding surfaces be provided on both sides of the grinding member, and it is more preferable that the grinding surfaces be provided on the top and both sides of the grinding member.

In the plane of the cat's claw polisher/grinder, the planar shape of the grinding member is preferably linear from the viewpoint of efficiently polishing/grinding the cat's claws without giving the cat discomfort. Examples of the linear shape include straight lines, curved lines, and wavy lines, but the present invention is not limited to such linear shapes. The planar shape of the grinding member is preferably linear from the viewpoint of easily manufacturing the cat's claw polisher/grinder and efficiently polishing/grinding the cat's claws. The line width of the linear grinding member cannot be determined in general because it varies depending on the type of grinding member. The line width of the linear grinding member is preferably 0.5 to 5 mm, more preferably 0.5 to 3 mm, and even more preferably 0.8 to 1.5 mm, from the viewpoint of maintaining the mechanical strength of the grinding member when the cat scratches the top surface of the cat's claw polisher/grinder, and efficiently polishing/grinding the cat's claws while not giving the cat discomfort. The length of the grinding member on the plane of the cat's claw grinder/sharpener cannot be determined in general terms because it varies depending on the shape and size of the cat's claw grinder/sharpener, so it is preferable to determine it appropriately depending on the shape and size of the cat's claw grinder/sharpener.

The grinding members may be formed across the entire width of the cat's claw grinder, may be formed in the center of the cat's claw grinder, or may be formed scattered throughout the cat's claw grinder, and the present invention is not limited by the arrangement of the grinding members in the cat's claw grinder. From the viewpoint of efficiently grinding and grinding the cat's claws, it is preferable that the grinding members are formed across the entire width of the cat's claw grinder or close to it.

The cat's claw grinder/sharpener of the present invention has a grinding member, a core having a plurality of wavy shapes on its side, and a liner. It is preferable that the grinding member, the core, and the liner are arranged in the cat's claw grinder/sharpener so that their respective surfaces are perpendicular to the plane of the cat's claw grinder/sharpener.

The top surface of the cat's claw grinder (flat surface of the cat's claw grinder) of the present invention contains the end surface of the grinding member, the end surface of the corrugated core, and the end surface of the liner, and a space based on the corrugated core exists between the grinding surface on the side surface of the grinding member and the side surface of the core, and this space is connected to the top surface of the cat's claw grinder. Therefore, when a cat raises its claws and scratches the top surface of the cat's claw grinder, the tip of the cat's claw gets caught on the grinding member, core, and liner and is ground, and is also ground by rubbing against the grinding surface of the grinding member that exists in the space.

The liner may be a liner generally used for cardboard. The liner usually has a flat shape, but may be curved or have a shape such as a corrugated shape, as long as it does not impede the object of the present invention. A grinding surface may be formed by adhering the abrasive material to the side of the liner or by attaching an abrasive material such as abrasive paper (sandpaper). When a grinding surface is formed on the side of the liner, the cat's claws rub against the grinding surface, so that the cat's claws can be efficiently ground. The grinding surface may be provided on one side or both sides of the liner, but it is preferable that the grinding surface be provided on both sides of the liner from the viewpoint of efficiently grinding the cat's claws.

The core may be a core generally used in corrugated cardboard. The core may have a number of wave shapes. Examples of the wave shapes of the core include the wave shapes of cores used in corrugated cardboard as specified in JIS Z1516 (2003), but the present invention is not limited to these examples.

The number of liners and cores cannot be determined in general terms because it varies depending on the shape and size of the cat's claw sharpener/grinder, so it is preferable to determine it appropriately depending on the shape and size of the cat's claw sharpener/grinder.

The grinding member, core and liner can be integrated by bonding their respective contact points with an adhesive.

The surface on which the end face of the grinding member, the end face of the corrugated core, and the end face of the liner are present is the polishing and grinding surface of the cat's claw. Also, the surface on which the end face of the grinding member is not present and on which the end face of the corrugated core and the end face of the liner are present is the polishing surface of the cat's claw.

The surface (grinding surface) on which the end face of the grinding member, the end face of the corrugated core, and the end face of the liner are present may be formed only on the top surface of the cat's claw grinder, or may be formed on both the top and bottom surfaces of the cat's claw grinder.

When the surface (grinding surface) on which the end faces of the grinding members, the end faces of the corrugated core, and the end faces of the liner are present is formed only on the top surface of the cat's claw grinder (the flat surface of the cat's claw grinder), its underside (the back surface of the cat's claw grinder) may be a surface (grinding surface) on which the end faces of the grinding members are not present and on which the end faces of the corrugated core and the end faces of the liner are present, or may be a flat surface on which none of the end faces of the grinding members, the end faces of the corrugated core, and the end faces of the liner are present, such as the surface of paper.

When the underside of the cat's claw grinder (the back side of the cat's claw grinder) is a surface (grinding surface) where there is no end face of the grinding member and where there is an end face having a corrugated shape of the core and an end face of the liner, the cat's claws can be ground and polished on the upper surface of the cat's claw grinder (the flat surface of the cat's claw grinder), and when grinding the cat's claws without grinding them, the cat's claws can be turned over and the cat's claws can be ground on the underside of the cat's claw grinder (the back side of the cat's claw grinder). In this way, if the underside of the cat's claw grinder (the back side of the cat's claw grinder) is a surface (grinding surface) where there are no grinding member end faces and where the corrugated end face of the core and the end face of the liner are present, before the cat uses the top surface of the cat's claw grinder (the flat surface of the cat's claw grinder) and the cat's claws are excessively ground down, the cat's claw grinder can be turned over so that the surface (grinding surface) where the corrugated end face of the core and the end face of the liner are present becomes the top surface of the cat's claw grinder (the flat surface of the cat's claw grinder), thereby preventing excessive grinding of the cat's claws.

Therefore, from the viewpoint of allowing the cat to continue sharpening the cat's claws using the cat's claw sharpener/grinder of the present invention after the cat has finished sharpening its claws, it is preferable that the upper surface of the cat's claw sharpener/grinder (the flat surface of the cat's claw sharpener/grinder) is a surface (shaping/grinding surface) on which the end faces of the sharpening member, the end face having the wavy shape of the core, and the end face of the liner are present, and that the lower surface of the cat's claw sharpener (the back surface of the cat's claw sharpener/grinder) is a surface (shaping surface) on which the end faces of the sharpening member are not present, and on which the end face having the wavy shape of the core and the end face of the liner are present.

In addition, if the end faces of the grinding member, the end face of the corrugated core, and the end face of the liner are formed on both the upper and lower surfaces of the cat's claw grinder, when the upper surface is damaged by a cat's claws, the lower surface of the cat's claw grinder can be effectively utilized by flipping the upper and lower surfaces over, thereby extending the life of the cat's claw grinder.

Cats have individual differences in the direction in which they prefer to scratch the top surface of the cat's claw grinder with their claws. Therefore, from the viewpoint of efficiently grinding and grinding the cat's claws, it is preferable that the side of the grinding member of the cat's claw grinder is arranged in a direction that intersects with the direction in which the top surface of the cat's claw grinder is scratched with its claws. The direction that intersects with the direction in which the cat scratches with its claws means a direction perpendicular to the direction in which the cat scratches with its claws and a direction slightly diagonal to the direction in which the cat scratches with its claws. In addition, from the viewpoint of efficiently grinding and grinding the cat's claws, it is preferable that the liner of the cat's claw grinder is arranged in a direction that is parallel to the direction in which the cat scratches with its claws. The direction that is parallel to the direction in which the cat scratches with its claws means a direction that is parallel to the direction in which the cat scratches with its claws and a direction that is slightly diagonal to the direction in which the cat scratches with its claws.

The cat's claw polisher/grinder of the present invention is constructed as described above. The size and shape of the cat's claw polisher/grinder of the present invention are not particularly limited, and can be adjusted appropriately depending on the location where the cat's claw polisher/grinder 1 is used.

The planar shape of the cat's claw polisher/grinder of the present invention may be rectangular, circular, elliptical, triangular, other polygonal, or irregular. The three-dimensional shape of the cat's claw polisher/grinder of the present invention is not particularly limited, and may be, for example, a standard rectangular parallelepiped, a cube, a three-dimensional shape with a cross-sectional shape such as an S-shape or U-shape, or a cylindrical, spherical, conical, or other shape. The cat's claw polisher/grinder of the present invention may be disposed on the sofa surface of a cat bed.

Examples of the size of the cat's claw sharpener/grinder of the present invention include a rectangular parallelepiped with a length of 20 to 80 cm and a width of 10 to 30 cm, and a cylindrical body with a circular planar shape and a diameter of 20 to 80 cm. There are no particular limitations on the thickness of the cat's claw sharpener/grinder, but taking into consideration the usability and mechanical strength of the cat's claw sharpener/grinder, it is preferable that the thickness be, for example, about 1 to 10 cm.

The cat's claw grinder/sharpener of the present invention may be attached to a mold to fix it. The cat's claw grinder/sharpener of the present invention may also be inserted into a cylindrical body for use. It is preferable that an exposure window is provided on the side of the cylindrical body to expose the cat's claw grinder/sharpener to the outside, and an inlet for the cat's claw grinder/sharpener to insert or remove it is provided in the opening. Both the mold and the cylindrical body can be made of cardboard, cardboard, polypropylene, acrylic resin, polyester, AS resin, ABS resin, or other resin, wood, etc.

When the cat's claw polisher/grinder of the present invention is fixed inside a mold, the used cat's claw polisher/grinder can be removed from the mold and replaced with a new cat's claw polisher/grinder, which can then be installed into the mold, allowing the mold to be reused.

The cat's claw filer/grinder of the present invention may also be manufactured in advance by dividing it into multiple blocks, so that a damaged cat's claw filer/grinder block can be replaced with a new cat's claw filer/grinder block.

The cat's claw grinder/sharpener of the present invention can be used by standing it upright in a direction perpendicular to the floor surface on which it is placed. In this case, a stand to prevent the cat's claw grinder/sharpener from falling over may be attached to the surface of the cat's claw grinder/sharpener that comes into contact with the floor surface, and the cat's claw grinder/sharpener may be provided with a mounting device such as a hook for mounting it to a pillar, wall, etc., or with a mounting means such as double-sided adhesive tape.

The cat's claw polisher/grinder of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings, and the scope of the present invention may include embodiments other than those shown in the drawings.

A first embodiment of the cat's claw polisher/grinder of the present invention is shown in FIG. 1. FIG. 1 is a schematic plan view showing one embodiment of the cat's claw polisher/grinder 1 of the present invention. FIG. 2 is a schematic enlarged view of the part surrounded by the circle X of the cat's claw polisher/grinder shown in FIG. 1.

In the first embodiment of the cat's claw polisher/grinder 1 of the present invention, as shown in FIG. 2, the cat's claw polisher/grinder 1 has a polishing member 2 having a polishing surface 2a for polishing a cat's claws on at least one side, a core 3 having a plurality of wave shapes on the side, and a liner 4. The upper surface of the cat's claw polisher/grinder 1 is formed with the end surface of the polishing member 2, the end surface of the core 3 having a wave shape, and the end surface of the liner 4. A space S is formed between the polishing surface 2a of the polishing member 2 and the side surface 3a of the core 3, and the space S is connected to the upper surface of the cat's claw polisher/grinder 1.

The cat's claw polisher/grinder 1 of the first embodiment has a laminated cardboard 5 in which multiple cores 3 and multiple liners 4 are alternately stacked, as shown in FIG. 2. The grinding member 2 is provided between the multiple laminated cardboards 5 in a direction perpendicular to the liners 4 of the laminated cardboard 5.

The grinding member 2 and the laminated cardboard 5 may be fixed by pressing them together to prevent them from shifting when the cat raises its claws and scratches the surface of the cat's claw grinder 1, or the grinding member 2 and the laminated cardboard 5 may be integrated with an adhesive such as an adhesive or double-sided adhesive tape. If the grinding member 2 and the laminated cardboard 5 are integrated with an adhesive, it is preferable to prevent adhesive from adhering to the portion of the grinding member 2 that comes into contact with the cat's claws, from the viewpoint of efficiently grinding and grinding the cat's claws with the grinding member 2.

As shown in FIG. 2, the laminated cardboard 5 has multiple cores 3 and multiple liners 4 stacked adjacent to each other. For example, in a laminated cardboard 5 having three layers of cores 3, the cores 3 and liners 4 are stacked in the following order: liner 4, core 3, liner 4, core 3, liner 4, core 3 and liner 4. The contact area between the cores 3 and liners 4 can be bonded with an adhesive, in the same way as commonly used cardboard.

For the laminated corrugated board 5, for example, corrugated board as specified in JIS Z1516 (2003) can be used. There are mainly two-sided corrugated board and double-sided corrugated board, but either type can be used in the present invention. Corrugated board types include, for example, A-type (symbol: AF), B-type (symbol: BF), and C-type (symbol: CF) as specified in JIS Z1516 (2003), but the present invention is not limited to these examples.

The distance L between adjacent grinding members 2 shown in FIG. 1 is preferably about 10 to 100 mm, more preferably about 20 to 50 mm, from the viewpoint of efficiently grinding and grinding the cat's claws and not causing discomfort to the cat. The number of grinding members 2 provided in the cat's claw grinder 1 varies depending on the shape and size of the cat's claw grinder 1 and cannot be determined in general, so it is preferable to determine it appropriately depending on the shape and size of the cat's claw grinder 1. From the viewpoint of efficiently grinding and grinding the cat's claws, the number of grinding members 2 is preferably 5 or more, more preferably 10 or more, and the upper limit cannot be determined in general because it varies depending on the size of the cat's claw grinder 1, but is usually preferably 100 or less, more preferably 50 or less, and even more preferably 30 or less.

As shown in Figs. 1 and 2, the end of the grinding member 2 is provided so as to be exposed on the top surface of the cat's claw polisher/grinder 1. For example, as shown in Fig. 3, a recess (not shown) may be provided on the top surface of the laminated cardboard 5, or a through hole (not shown) may be provided in the laminated cardboard 5, and the grinding member 2 may be inserted into the recess or through hole so that a space S is formed between the grinding member 2 and the core 3. Also, as shown in Fig. 4, the grinding member 2 may be sandwiched between the core 3 of the laminated cardboard 5 and the core 3 of another laminated cardboard 5a so that a space S is formed.

Figure 3 is a schematic diagram of a vertical section of a cat's claw polishing/grinder 1 of the present invention, in which a recess (not shown) is provided on the top surface of the laminated cardboard 5, or a through hole (not shown) is provided in the laminated cardboard 5, and the grinding member 2 is inserted into the recess or through hole so that a space S is formed between the grinding member 2 and the core 3. Figure 4 is a schematic diagram of a vertical section of a cat's claw polishing/grinder 1 of the present invention, in which the grinding member 2 is sandwiched between the core 3 of the laminated cardboard 5 and the core 3 of another laminated cardboard 5a so that a space S is formed.

In FIG. 3, (a) is a schematic diagram of the vertical cross section of the cat's claw grinder 1 when the grinding member 2 protrudes from the top surface of the cat's claw grinder 1, (b) is a schematic diagram of the cat's claw grinder 1 when the grinding member 2 is provided inside the top surface of the cat's claw grinder 1, and (c) is a schematic diagram of the cat's claw grinder 1 when the grinding member 2 is provided so as to be flush with the top surface of the cat's claw grinder 1.

In the present invention, the grinding member 2 may protrude from the top surface of the cat's claw grinder 1 as shown in FIG. 3(a), may be provided inside the top surface of the cat's claw grinder 1 as shown in FIG. 3(b), or may be formed so as to be flush with the top surface of the cat's claw grinder 1 as shown in FIG. 3(c).

In the cat's claw grinder 1 shown in FIG. 3, from the viewpoint of efficiently grinding and grinding the cat's claws and not causing discomfort to the cat, the grinding member 2 is preferably provided inside the upper and lower surfaces of the cat's claw grinder 1 as shown in FIG. 3(b), or is formed so as to be flush with the upper surface of the cat's claw grinder 1 as shown in FIG. 3(c), and is more preferably provided inside the upper and lower surfaces of the cat's claw grinder 1 as shown in FIG. 3(b). In the cat's claw grinder 1 shown in FIG. 3(b), the lower surface of the grinding member 2 may be formed so as to be flush with the lower surface of the cat's claw grinder 1. In the cat's claw grinder 1 shown in FIG. 3(c), the grinding member 2 may be provided inside the lower surface of the cat's claw grinder 1. In addition, in the cat's claw polisher/grinder 1 shown in FIG. 3, a grinding surface (not shown) is formed on the side of the grinding member 2.

In the cat's claw grinder/sharpener 1 shown in FIG. 3(a), the height of the grinding member 2 protruding from the top surface of the cat's claw grinder/sharpener 1 is preferably 0 to 1 mm, and more preferably 0 to 0.5 mm, from the viewpoint of efficiently grinding and sharpening the cat's claws while avoiding causing discomfort to the cat.

In the cat's claw polisher/grinder 1 shown in FIG. 3(b), the depth from the top surface of the cat's claw polisher/grinder 1 to the position where the grinding surface of the grinding member 2 is present is preferably 8 mm or less, more preferably 5 mm or less, and even more preferably 3 mm or less, from the viewpoint of efficiently polishing and grinding the cat's claws. In addition, the depth from the top surface of the cat's claw polisher/grinder 1 to the position where the grinding surface of the grinding member 2 is present is preferably 1 mm or more, and more preferably 2 mm or more, from the viewpoint of preventing the cat's claws from being excessively ground.

In the cat's claw polisher/grinder 1 shown in FIG. 4, the grinding member 2 is sandwiched between the core 3 of the laminated cardboard 5 and the core 3 of another laminated cardboard 5a so that a space S is formed between them. The space S between the grinding surface (not shown) on the side of the grinding member 2 and the side of the core 3 is formed by the grinding surface of the grinding member 2 and the wavy shape of the side of the core 3.

In the cat's claw polisher/grinder 1 shown in FIG. 4, similar to the cat's claw polisher/grinder 1 shown in FIG. 3, it is preferable that a recess (not shown) is provided on the top surface of the laminated cardboard 5, or a through hole (not shown) is provided in the laminated cardboard 5, and the grinding member 2 is inserted into the recess or through hole so that a space S is formed between the grinding member 2 and the core 3.

In the cat's claw polisher/grinder 1 shown in FIG. 4, the upper and lower surfaces of the grinding member 2 are on the same plane as the upper and lower surfaces of the cat's claw polisher/grinder 1. The upper and lower surfaces of the grinding member 2 may protrude from the upper and lower surfaces of the cat's claw polisher/grinder 1, or may be provided inside the upper and lower surfaces of the cat's claw polisher/grinder 1. From the viewpoint of efficiently polishing and grinding the cat's claws and not causing discomfort to the cat, it is preferable that the grinding member 2 is formed so as to be on the same plane as the upper surface of the cat's claw polisher/grinder 1, or is provided inside the upper surface of the cat's claw polisher/grinder 1. In the cat's claw polisher/grinder 1 shown in FIG. 4, a grinding surface (not shown) is formed on the side of the grinding member 2.

In the cat's claw polisher/grinder 1 shown in FIG. 4, if the polishing member 2 protrudes from the top surface of the cat's claw polisher/grinder 1, the height of the protruding polishing member 2 is preferably about 0 to 1 mm, and more preferably about 0 to 0.5 mm, from the viewpoint of efficiently polishing and grinding the cat's claws while not causing discomfort to the cat.

In the cat's claw polisher/grinder 1 shown in FIG. 4, when the grinding member 2 is located inside the top surface of the cat's claw polisher/grinder 1, the depth from the top surface of the cat's claw polisher/grinder 1 to the position where the grinding surface of the grinding member 2 is located is preferably 8 mm or less, more preferably 5 mm or less, and even more preferably 3 mm or less, from the viewpoint of efficiently polishing and grinding the cat's claws. Also, the depth from the top surface of the cat's claw polisher/grinder 1 to the position where the grinding surface of the grinding member 2 is located is preferably 1 mm or more, and more preferably 2 mm or more, from the viewpoint of preventing the cat's claws from being excessively polished.

From the viewpoint of increasing the production efficiency of the cat's claw polishing/grinder 1, it is preferable that the grinding member 2 is sandwiched between the core 3 of the laminated cardboard 5 and the core 3 of another laminated cardboard 5a as shown in FIG. 4. Also, from the viewpoint of efficiently polishing/grindering cat's claws, it is preferable that a plate-shaped grinding member is used as the grinding member 2, and that the grinding member 2 is disposed on the cat's claw polishing/grinder 1 perpendicular to the plane of the cat's claw polishing/grinder 1 as shown in FIG. 3 and FIG. 4.

The grinding member 2 may be bonded to the laminated cardboard 5, for example, by applying adhesive to the inner surface of the recess or through hole of the laminated cardboard 5 or to the grinding member 2, and then inserting the grinding member 2 into the recess or through hole. Alternatively, multiple laminated cardboards 5 may be used, and adhesive may be applied to the contact area between the side of the core 3 of the laminated cardboard 5 and the side of the grinding member 2, to bond the side of the core 3 to the side of the grinding member 2.

On the top surface of the cat's claw polisher/grinder 1 shown in Figures 1 and 2, the arrangement directions of the core 3 and liner 4 are parallel, and the arrangement directions of the grinding member 2 and liner 4 are perpendicular. As shown in Figure 2, a space S is formed between the grinding surface 2a of the grinding member 2 and the side surface 3a of the core 3, and the space S is connected to the top surface of the cat's claw polisher/grinder 1. Therefore, when a cat scratches the top surface of the cat's claw polisher/grinder 1 with its paws, the cat's claws enter the space S and rub against the grinding surface 2a of the grinding member 2 that exists in the space S, so that the cat's claws can be polished efficiently.

In the cat's claw polisher/grinder 1, the grinding member 2 and the liner 4 are arranged in a perpendicular direction. The angle θ between the grinding member 2 and the liner 4 shown in FIG. 2 is ideally a right angle (90°). However, the angle θ does not necessarily have to be a right angle, and is preferably 45 to 90°, more preferably 60 to 90°, and even more preferably 90°.

In the cat's claw polisher/grinder 1 shown in FIG. 1, the cat's claw polisher/grinder 1 is fixed inside a mold 6 when in use.

A second embodiment of the cat's claw polisher/grinder of the present invention is shown in FIG. 5. FIG. 5 is a schematic plan view showing one embodiment of the cat's claw polisher/grinder 1 of the present invention. FIG. 6 shows a schematic enlarged view of the portion surrounded by circle Y of the cat's claw polisher/grinder 1 shown in FIG. 5.

As shown in Figures 5 and 6, cat's claw polisher/grinder 1 has a grinding member 2 with a grinding surface on the side for grinding cat's claws, a corrugated core 3, and a flat liner 4. The end faces of the grinding member 2, the corrugated end face of the core 3, and the end face of the liner 4 are formed on the top surface of cat's claw polisher/grinder 1 (the flat surface of cat's claw polisher/grinder 1).

The grinding members 2, the cores 3, and the liners 4 are stacked in parallel. The side of the liner 4 is in contact with the side of the core 3, and the side of the grinding members 2 is in contact with the side of the core 3. It is preferable that both side surfaces of the grinding members 2 are in contact with the side of the core 3. As shown in FIG. 6, a space G is formed between the grinding surface 2a of the grinding members 2 and the side surface 3a of the core 3. The space G is connected to the top surface of the cat's claw polisher/grinder 1.

The cores 3 and liners 4 are stacked to form a laminate. The laminate of cores 3 and liners 4 can be made of the laminate of laminated cardboard 5. The laminated cardboard 5 is formed by stacking multiple cores 3 and multiple liners 4 adjacent to each other in an alternating manner. The configuration of the laminated cardboard 5 is preferably the same as that described above.

The distance L between adjacent grinding members 2 shown in FIG. 5 is preferably about 10 to 100 mm, more preferably about 20 to 50 mm, from the viewpoint of efficiently grinding and grinding the cat's claws and not causing discomfort to the cat. The number of grinding members 2 provided in the cat's claw grinder 1 varies depending on the shape and size of the cat's claw grinder 1 and cannot be determined in general, so it is preferable to determine it appropriately depending on the shape and size of the cat's claw grinder 1. From the viewpoint of efficiently grinding and grinding the cat's claws, the number of grinding members 2 is preferably 5 or more, more preferably 10 or more, and the upper limit cannot be determined in general because it varies depending on the size of the cat's claw grinder 1, but is usually preferably 100 or less, more preferably 50 or less, and even more preferably 30 or less.

The end of the grinding member 2 is provided so as to be exposed on the upper surface of the cat's claw polisher/grinder 1. The grinding member 2 may be inserted into a recess (not shown) or through hole (not shown) provided on the upper surface of the laminated cardboard 5 as shown in FIG. 3, or may be sandwiched between the core 3 of the laminated cardboard 5 and the core 3 of another laminated cardboard 5a as shown in FIG. 4. When the grinding member 2 is sandwiched between the core 3 of the laminated cardboard 5 and the core 3 of another laminated cardboard 5a, a space S is formed between the grinding surface formed on the side of the grinding member 2 and the corrugated side of the core 3 as shown in FIG. 4.

From the viewpoint of increasing the mechanical strength of the laminated cardboard 5, it is preferable that the grinding member 2 is inserted into a recess or through hole provided on the upper surface of the laminated cardboard 5. From the viewpoint of increasing the production efficiency of the cat's claw polishing/grinder 1, it is preferable that the grinding member 2 is sandwiched between the core 3 of the laminated cardboard 5 and the core 3 of another laminated cardboard 5a as shown in FIG. 4. Also, from the viewpoint of efficiently polishing/grindering the cat's claws, it is preferable that a plate-shaped grinding member is used as the grinding member 2, and that the grinding member 2 is disposed on the cat's claw polishing/grinder 1 perpendicular to the plane of the cat's claw polishing/grinder 1 as shown in FIG. 3 and FIG. 4.

The grinding member 2 may be bonded to the laminated cardboard 5, for example, by applying an adhesive to the inner surface of a recess or through hole in the laminated cardboard 5 or to the grinding member 2, and then inserting the grinding member 2 into the recess or through hole. Alternatively, multiple laminated cardboards 5 may be used, and an adhesive may be applied to the interface between the laminated cardboards 5 and the grinding member 2 to bond the laminated cardboards 5 and the grinding member 2.

The grinding member 2 is preferably similar to the embodiment of the grinding member 2 shown in Figures 3 and 4 described above.

In the cat's claw polishing/grinder 1 shown in Figs. 5 and 6, a plurality of polishing members 2, a plurality of cores 3, and a plurality of liners 4 are stacked in parallel. As shown in Fig. 6, a space G is formed between the polishing surface 2a of the polishing member 2 and the side surface 3a of the core 3, and the space G is connected to the upper surface of the cat's claw polishing/grinder 1. Therefore, when a cat scratches the upper surface of the cat's claw polishing/grinder 1 with its paws, the cat's claws enter the space G, and the cat's claws are rubbed against the polishing surface 2a of the polishing member 2 present in the space G and are polished, so that the cat's claws can be polished efficiently. The width of the polishing member 2 and the width of the polishing member 2' shown in Fig. 6 are different, but they may be the same or different.

In the cat's claw polisher/grinder 1, the grinding member 2, core 3, and liner 4 are stacked in parallel, but may be stacked at an inclination angle to the extent that the object of the present invention is not impeded.

The cat's claw polisher/grinder 1 shown in FIG. 5 is fixed in a mold 6 for use. A plurality of laminated cardboard boxes 5 may be prepared as the cat's claw polisher/grinder 1 of the present invention, and damaged laminated cardboard boxes 5 may be replaced with new laminated cardboard boxes 5. In this case, the cat's claw polisher/grinder 1 of the present invention may be fixed by providing an attachment flange 7 at the end of the laminated cardboard box 5, as shown in FIG. 5, and inserting the attachment flange 7 into a fixing member 8 arranged in the mold 6. Examples of the fixing member 8 include elastic bodies made of rubber, sponge, elastomer, etc., and resin molded products such as polypropylene, vinyl chloride resin, AS resin, and ABS resin, but the present invention is not limited to these examples.

The grinding member 2 of the cat's claw grinder 1 may also be used as the mounting flange 7. When the grinding member 2 is used as the mounting flange 7, the grinding member 2 of the damaged cat's claw grinder 1 can be removed from the fixing member 8 and replaced with a new cat's claw grinder 1.

A third embodiment of the cat's claw polisher/grinder of the present invention is shown in FIG. 7. In the cat's claw polisher/grinder 1 of the third embodiment of the present invention, multiple polishing members 2, multiple cores 3, and multiple liners 4 are each stacked concentrically. The side of the liner 4 contacts the side of the core 3, and the side of the polishing member 2 contacts the side of the core 3. A space D is formed between the grinding surface of the polishing member 2 and the side of the core 3, and the space D is connected to the upper surface of the cat's claw polisher/grinder 1.

The cat's claw polishing/grinder 1 of the third embodiment differs from the cat's claw polishing/grinder 1 of the second embodiment in that, in the cat's claw polishing/grinder 1 of the third embodiment, the multiple polishing members 2, multiple cores 3, and multiple liners 4 are each stacked concentrically, whereas, in the cat's claw polishing/grinder 1 of the second embodiment, the multiple polishing members 2, multiple cores 3, and multiple liners 4 are each stacked in parallel.

The cat's claw polisher/grinder 1 of the third embodiment is preferably similar to the cat's claw polisher/grinder 1 of the second embodiment, except that, in contrast to the cat's claw polisher/grinder of the second embodiment, the multiple polishing members 2, multiple cores 3, and multiple liners 4 are each stacked concentrically.

In the third embodiment of the cat's claw polisher/grinder, the multiple grinding members 2, multiple cores 3, and multiple liners 4 can be integrated with adhesive.

The laminated cardboard 5 can be used for the laminate of the cores 3 and liners 4. The laminated cardboard 5 is formed by stacking multiple cores 3 and multiple liners 4 adjacent to each other in an alternating manner. The configuration of the laminated cardboard 5 is preferably the same as that described above.

The grinding member 2, core 3, and liner 4 of the cat's claw polisher/grinder 1 are arranged concentrically, but they do not necessarily have to be perfectly concentric, and each may be distorted within a range that does not impede the purpose of the present invention.

The distance between adjacent grinding members 2 is preferably the same as the distance L between the grinding members 2 of the cat's claw grinder 1 shown in FIG. 1. In addition, the number of grinding members 2 provided in the cat's claw grinder 1 varies depending on the size of the cat's claw grinder 1 and cannot be determined in general, so it is preferable to determine it appropriately depending on the size of the cat's claw grinder 1. From the viewpoint of efficiently grinding and grinding the cat's claws, the number of grinding members 2 is preferably 5 or more, more preferably 10 or more, and the upper limit varies depending on the size of the cat's claw grinder 1 and cannot be determined in general, but is usually preferably 100 or less, more preferably 50 or less, and even more preferably 30 or less.

The grinding member 2 may protrude from the upper surface of the cat's claw grinder 1, may be provided inside the upper surface of the cat's claw grinder 1, or may be formed so as to be flush with the upper surface of the cat's claw grinder 1, as in the cat's claw grinder 1 shown in FIG. 1. Among these embodiments of the cat's claw grinder 1, from the viewpoint of efficiently grinding and grinding the cat's claws and not causing discomfort to the cat, it is preferable that the grinding member 2 is formed so as to be flush with the upper surface of the cat's claw grinder 1 or is provided inside the upper surface of the cat's claw grinder 1, and it is more preferable that the grinding member 2 is provided inside the upper surface of the cat's claw grinder 1.

In the cat's claw polisher/grinder 1 shown in FIG. 7, if the polishing member 2 protrudes from the top surface of the cat's claw polisher/grinder 1, the height of the protruding polishing member 2 is preferably about 0 to 1 mm, and more preferably about 0 to 0.5 mm, from the viewpoint of efficiently polishing and grinding the cat's claws while not causing discomfort to the cat.

In the cat's claw polisher/grinder 1 shown in FIG. 7, when the grinding member 2 is located inside the top surface of the cat's claw polisher/grinder 1, the depth from the top surface of the cat's claw polisher/grinder 1 to the position where the grinding surface of the grinding member 2 is located is preferably 8 mm or less, more preferably 5 mm or less, and even more preferably 3 mm or less, from the viewpoint of efficiently polishing and grinding the cat's claws. Also, the depth from the top surface of the cat's claw polisher/grinder 1 to the position where the grinding surface of the grinding member 2 is located is preferably 1 mm or more, and more preferably 2 mm or more, from the viewpoint of preventing the cat's claws from being excessively polished.

In the cat's claw polishing/grinder 1 shown in Figure 7, a space D is formed between the grinding surface of the grinding member 2 and the side of the core 3, so that the cat's claws can enter the space D and rub against the grinding surface of the grinding member 2 that exists in the space D, allowing the cat's claws to be ground efficiently.

The size of the cat's claw polisher/grinder 1 is not particularly limited, and can be adjusted appropriately depending on the location where the cat's claw polisher/grinder 1 is used. One example of the cat's claw polisher/grinder 1 of the present invention is a cat's claw polisher/grinder having a circular planar shape with an outer diameter of 20 to 80 cm and a cylindrical shape with a thickness of about 1 to 10 cm. A space P exists in the center of the cat's claw polisher/grinder 1 shown in FIG. 7. A core material (not shown) for fixing the cat's claw polisher/grinder 1 to a substrate (not shown) may be inserted into the space P, if necessary.

As described above, the cat's claw grinder/sharpener 1 of the present invention utilizes the cat's habit of scratching the top surface of cardboard with its claws. The cat's claw grinder/sharpener 1 of the present invention has a grinding member having a grinding surface for grinding the cat's claws on at least one side, a core having a plurality of wave shapes on the side, and a liner, and the end face of the grinding member, the end face having the wave shape of the core, and the end face of the liner are formed on the top surface of the cat's claw grinder/sharpener, and a space is formed between the grinding surface of the grinding member and the side face of the core, and the space is connected to the top surface of the cat's claw grinder/sharpener, so that when the cat scratches the top surface of the cat's claw grinder/sharpener 1, the claws are ground and the tips of the claws are ground at the same time, eliminating the need for a human to cut the cat's claws with a nail clipper, which is a cumbersome task that cats dislike, as in the past.

Therefore, the cat's claw polishing/grinder 1 of the present invention is expected to be extremely useful for cat owners, cat lovers, and others who keep cats.

Next, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

Example 1
A cat's claw polisher/grinding tool 1 was produced according to the embodiment shown in Fig. 1. More specifically, a corrugated cardboard having a core 3 and a liner 4 of B-grade (symbol: BF) was prepared as the corrugated cardboard, and a rectangular parallelepiped cat's claw polisher/grinding tool 1 having a length of 50 cm, a width of 12 cm, and a height of 3 cm was produced. In addition, a polishing member (length: 10.8 cm, width: 2.8 cm, thickness: about 2 mm) was used as the polishing member 2, which was made by folding waterproof (sand) paper (grain size: #100) in half so that the polishing surface was located on the outside, and attaching the folded inner surfaces to each other with adhesive tape on both sides [manufactured by Nitto Corporation, product number: T4010]. On the top surface of the cat's claw polisher/grinder 1, 18 notches (recesses) 11 cm wide and 3 cm deep were made at equal intervals of 2.5 cm in the direction perpendicular to the longitudinal direction, and a grinding member 2 was inserted into each notch so that the depth from the top surface of the cat's claw polisher/grinder 1 to the top end of the grinding member 2 was 2 mm. Since the grinding member 2 is not provided on the bottom surface of the cat's claw polisher/grinder 1, the end face of the core 3 and the end face of the liner 4 are present.

The cat's claw polishing/grinder 1 obtained above was placed in a mold, and then placed on the floor with its top surface (polishing/grinder surface) facing upwards, and the cat's claw polishing/grinder 1 was allowed to be used freely by a pet cat for five days. Figure 8 shows the state of the tips of the cat's front paw claws before and after using the cat's claw polishing/grinder 1. It was confirmed that the tips of the cat's front paw claws 9 were sharp before using the cat's claw polishing/grinder 1, as shown in Figure 8(a), whereas after using the cat's claw polishing/grinder 1, they were ground down, as shown in Figure 8(b).

Figure 9 shows a photo of the top surface of cat's claw grinder 1 after the cat was allowed to freely use the cat's claw grinder 1 for five days, and Figure 10 shows a photo of the claws on the cat's front paws. As shown in Figure 9, scratches caused by the cat's claws were found on the top surface of cat's claw grinder 1. Also, as shown in the area circled in Figure 10, it can be seen that the tips of the claws on the cat's front paws were efficiently ground down by using cat's claw grinder 1.

After using the cat's claw polisher/grinder 1, the top surface (polishing/grinding surface) and the bottom surface (polishing surface) of the cat's claw polisher/grinder 1 are inverted, allowing the cat's claws to be polished on the bottom surface (polishing surface).

Example 2
A cat's claw polisher/grinder was produced in the same manner as in Example 1, except that the polishing member used was a polishing cloth (grain size: No. 80) folded in half so that the polishing surface was facing outward, and a 0.15 mm thick polypropylene sheet was sandwiched and adhered to the inner surface of the folded cloth (length: 10.8 cm, width: 2.8 cm, thickness: approximately 0.5 mm).

The cat's claw grinder obtained above was placed in a mold, and then placed on the floor with its upper surface (grinding surface) facing up, as in Example 1, and the cat's claw grinder was allowed to be used freely by a pet cat for five days. As a result, it was confirmed that the tips of the claws on the cat's front paws were sharp as shown in Figure 8(a) before use of the cat's claw grinder, as in Example 1, but were ground down as shown in Figure 8(b) after use of the cat's claw grinder. This shows that the tips of the claws on the cat's front paws are ground down efficiently by using the cat's claw grinder.

In addition, after using the cat's claw grinder, the top surface (grinding/sanding surface) and bottom surface (grinding surface) of the cat's claw grinder were inverted, allowing the cat's claws to be ground on the bottom surface (grinding surface).

Example 3
A cat's claw polisher/grinder was produced in the same manner as in Example 1, except that the polishing member used was a polishing cloth (grain size: No. 240) folded in half so that the polishing surface was facing outward, and a 0.15 mm thick polypropylene sheet was sandwiched and adhered to the inner surface of the folded cloth (length: 10.8 cm, width: 2.8 cm, thickness: approximately 0.5 mm).

The cat's claw grinder obtained above was placed in a mold, and then placed on the floor with its upper surface (grinding surface) facing up, as in Example 1, and the cat's claw grinder was allowed to be used freely by a pet cat for five days. As a result, it was confirmed that the tips of the claws on the cat's front paws were sharp as shown in Figure 8(a) before use of the cat's claw grinder, as in Example 1, but were ground down as shown in Figure 8(b) after use of the cat's claw grinder. This shows that the tips of the claws on the cat's front paws are ground down efficiently by using the cat's claw grinder.

In addition, after using the cat's claw grinder, the top surface (grinding/sanding surface) and bottom surface (grinding surface) of the cat's claw grinder were inverted, allowing the cat's claws to be ground on the bottom surface (grinding surface).

Example 4
A cat's claw polisher/grinding device 1 was produced according to the embodiment shown in Fig. 1. More specifically, a corrugated cardboard having a corrugated core 3 and a liner 4 of B-grade (symbol: BF) was prepared as the corrugated cardboard, and waterproof (sand) paper (grain size: #100) was used as the grinding member 2.

One side of a double-sided adhesive tape (manufactured by Nitoms Corporation, product number: T4010) was attached to the backside of the waterproof (sand) paper, and then the release paper from the double-sided adhesive tape attached to the waterproof (sand) paper was peeled off to expose the adhesive surface of the double-sided adhesive tape.

In the grinding member 2 located at the center upwards of the page in Figure 1, waterproof (sand) paper is placed with its grinding surface facing upwards and the adhesive side of the waterproof (sand) paper is affixed to the cardboard, the grinding surface of the waterproof (sand) paper is in contact with the core 3 of the cardboard adjacent to the grinding surface, and the grinding surface and the adjacent cardboard are placed so that the depth from the top surface of the cat's claw polisher/grinder 1 to the top end of the waterproof (sand) paper is 2 mm. In addition, the water-resistant (sand) paper was placed on the grinding member 2 from the center downwards on the paper surface of Figure 1 so that the grinding surface of the water-resistant (sand) paper was facing downwards, and the adhesive side of the water-resistant (sand) paper was attached to the cardboard, so that the grinding surface of the water-resistant (sand) paper was in contact with the core 3 of the cardboard adjacent to the grinding surface, and the grinding surface and the adjacent cardboard were placed so that the depth from the top surface of the cat's claw polisher/grinder 1 to the top end of the water-resistant (sand) paper was 2 mm.

The cardboard boxes were arranged so that the waterproof (sand) paper was positioned at equal intervals of 2.5 cm perpendicular to the longitudinal direction of the top surface of the cat's claw polisher/grinder 1, creating a rectangular cat's claw polisher/grinder 1 that is 50 cm long, 12 cm wide, and 3 cm high. The bottom surface of the cat's claw polisher/grinder 1 does not have the grinding member 2, so the end surface of the core 3 and the end surface of the liner 4 are present.

Next, the cat's claw polishing/grinder 1 obtained above was placed in a mold, and then placed on the floor with its top surface (polishing/grinder surface) facing upwards, and the cat's claw polishing/grinder 1 was allowed to be used freely by a pet cat for five days. As a result, it was confirmed that the tips of the claws on the cat's front paws were sharp as shown in Figure 8(a) before using the cat's claw polishing/grinder 1, as in Example 1, whereas after using the cat's claw polishing/grinder 1, they were ground down as shown in Figure 8(b). This shows that the tips of the claws on the cat's front paws are ground down efficiently by using the cat's claw polishing/grinder 1.

In addition, after using the cat's claw polisher/grinder 1, the upper surface (polishing/grinding surface) and the lower surface (polishing surface) of the cat's claw polisher/grinder 1 can be reversed to polish the cat's claws on the lower surface (polishing surface).

Example 5
A cat's claw polisher/grinder 1 was produced according to the embodiment shown in Fig. 5. More specifically, a single-sided corrugated cardboard having a core 3 and a liner 4 of B-grade (symbol: BF) was prepared as the corrugated cardboard, and the core 3, liner 4 and grinding member 2 were arranged in parallel, with both sides of the grinding member 2 being in contact with the core 3 of the single-sided corrugated cardboard, to produce a rectangular parallelepiped cat's claw polisher/grinder 1 having a length of 50 cm, a width of 12 cm and a height of 3 cm.

The grinding member 2 was made of waterproof (sand) paper (grain size: #100) folded in half so that the grinding surface was facing outward, with the folded inner surfaces attached to each other with adhesive tape on both sides (manufactured by Nitto Corporation, product number: T4010). The depth from the top of the cat's claw polisher/grinder 1 to the top end of the grinding member 2 was adjusted to 2 mm, and the grinding members 2 were placed at equal intervals of 2.5 cm perpendicular to the longitudinal direction of the cat's claw polisher/grinder 1.

The cat's claw polishing/grinder 1 obtained above was placed in a mold, and then placed on the floor with its top surface (polishing/grinder surface) facing upwards, and the cat's claw polishing/grinder 1 was allowed to be used freely by a pet cat for five days. As a result, it was confirmed that the tips of the claws on the cat's front paws were sharp before using the cat's claw polishing/grinder 1, as shown in Figure 8(a), whereas after using the cat's claw polishing/grinder 1, they were ground down, as shown in Figure 8(b). This shows that the tips of the claws on the cat's front paws are ground down efficiently by using the cat's claw polishing/grinder 1.

In addition, after using the cat's claw polisher/grinder 1, the upper surface (polishing/grinding surface) and the lower surface (polishing surface) of the cat's claw polisher/grinder 1 can be reversed to polish the cat's claws on the lower surface (polishing surface).

Example 6
In Example 5, a cat's claw polisher/grinder was produced in the same manner as in Example 5, except that a polishing cloth (grain size: No. 180) was folded in half so that the polishing surface was facing outward, and a 0.15 mm thick polypropylene sheet was sandwiched and adhered to the inner surface of the folded cloth (length: 10.8 cm, width: 2.8 cm, thickness: approximately 0.5 mm) was used as the polishing member.

The cat's claw grinder obtained above was placed in a mold, and then placed on the floor with its upper surface (grinding surface) facing up, as in Example 5, and the cat's claw grinder was allowed to be used freely by a pet cat for five days. As a result, it was confirmed that the tips of the claws on the cat's front paws were sharp before use of the grinder, as shown in Figure 8(a), whereas after use of the cat's claw grinder, they were ground down, as shown in Figure 8(b). This shows that the tips of the claws on the cat's front paws are ground down efficiently by using the cat's claw grinder.

In addition, after using the cat's claw grinder, the top surface (grinding/sanding surface) and bottom surface (grinding surface) of the cat's claw grinder were inverted, allowing the cat's claws to be ground on the bottom surface (grinding surface).

Example 7
A cat's claw polisher/grinder 1 was produced according to the embodiment shown in Fig. 7. More specifically, a single-sided corrugated cardboard having a core 3 and a liner 4 of B-grade (symbol: BF) was prepared as the corrugated cardboard, and the cardboard was rolled up into a circle so that both sides of the grinding member 2 were in contact with the core 3 of the single-sided cardboard, thereby producing a cylindrical cat's claw polisher/grinder 1 having a diameter of 30 cm in plan view and a height of 3 cm.

The grinding member 2 was made by folding a sheet of waterproof (sand) paper (grain size: #100) in half so that the grinding surface was facing outward, and the folded inner surfaces were attached to each other with adhesive tape on both sides (manufactured by Nitto Corporation, product number: T4010). The depth from the top of the cat's claw polisher/grinder 1 to the top end of the grinding member 2 was adjusted to 2 mm, and the grinding members 2 were placed at equal intervals of 2.5 cm.

The cat's claw polishing/grinder 1 obtained above was placed in a mold, and then placed on the floor with its top surface (polishing/grinder surface) facing upwards, and the cat's claw polishing/grinder 1 was allowed to be used freely by a pet cat for five days. As a result, it was confirmed that the tips of the claws on the cat's front paws were sharp before using the cat's claw polishing/grinder 1, as shown in Figure 8(a), whereas after using the cat's claw polishing/grinder 1, they were ground down, as shown in Figure 8(b). This shows that the tips of the claws on the cat's front paws are ground down efficiently by using the cat's claw polishing/grinder 1.

In addition, after using the cat's claw polisher/grinder 1, the upper surface (polishing/grinding surface) and the lower surface (polishing surface) of the cat's claw polisher/grinder 1 can be reversed to polish the cat's claws on the lower surface (polishing surface).

The above results show that by using the cat's claw polishing/grinding device of the present invention on a cat, it is possible to polish the cat's claws and also to efficiently grind the tips of the cat's claws without using nail clippers or the like, which is an excellent effect.

REFERENCE SIGNS LIST 1 Cat claw polishing/grinder 2, 2' grinding member 2a grinding surface of grinding member 3 Core 3a side of core 4 liner 5, 5a laminated cardboard 6 formwork 7 mounting flange 8 fixing member 9 cat's front paw claw

Claims (4)

A cat's claw grinder and polisher having a grinding/grinding surface on its upper surface for grinding and grinding a cat's claws, the cat's claw grinder and polisher comprising a grinding member having a grinding surface on at least one side for grinding a cat's claws, a core and a liner having multiple wave-shaped sides, the end face of the grinding member, the end face of the wave-shaped core and the end face of the liner being formed on the upper surface of the cat's claw grinder, the grinding surface of the grinding member and the wave-shaped side of the core being adjacent to each other, a space being formed between the grinding surface of the grinding member and the wave-shaped side of the core, the grinding surface of the grinding member being present within the space, and the space being connected to the upper surface of the cat's claw grinder and polisher. The cat's claw polisher and grinder according to claim 1, which has a laminated cardboard consisting of multiple liners and multiple cores stacked alternately, and a grinding member is provided between the multiple laminated cardboard in a direction perpendicular to the liners of the laminated cardboard. The cat's claw polisher and grinder according to claim 1, in which a plurality of grinding members, a plurality of cores, and a plurality of liners are stacked in parallel, the side of the liner contacts the side of the core, and the grinding surface of the grinding member contacts the side of the core. The cat's claw polisher and grinder according to claim 1, in which a plurality of grinding members, a plurality of cores, and a plurality of liners are stacked concentrically, the side of the liner contacts the side of the core, and the grinding surface of the grinding member contacts the side of the core.

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