JP2014103983A - Portable slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve weight saving while securing required rigidity strength.SOLUTION: A portable slope comprises a tabular slope body whose top face is a face on which a wheel chair travels. The slope body comprises a tabular core composed of corrugated cardboard material, and a reinforcement layer composed of fiber-reinforced resin material stuck to at least the top face and bottom face of the tabular core.

Description

  The present invention relates to a portable slope that is used to travel a wheelchair over a step formed between objects, and more particularly to a portable slope that has sufficient rigidity while reducing weight.

  Usually, in a building, the entrance is at a slightly higher position than the ground, and a step is formed between the entrance and the ground. However, it is difficult for wheelchair users to overcome such steps.

  Therefore, the present applicant has proposed a lightweight portable slope that is relatively easy to carry in Patent Document 1 below. This portable slope includes a plate-like slope body whose upper surface is a running surface of a wheelchair. The slope body has at least one selected from the group consisting of polyethylene, polyester, and vinyl ester by setting a surface of a core made of polyurethane foam around a carbon fiber and / or glass fiber in a mold. It is formed by pouring the above resin into the mold.

  Since the proposed portable slope uses foamed polyurethane as the core, it can be significantly reduced in weight compared to a conventional one using a lightweight metal such as aluminum. However, when caring for a wheelchair user at home, installation or removal of the portable slope is often performed by a woman or an elderly person. Therefore, the burden is still large, and further weight reduction is strongly desired.

Japanese Patent No. 4090751

  Therefore, the present invention provides a portable slope that can achieve further weight reduction as compared with the case of using polyurethane foam while ensuring the necessary rigidity and strength, based on the use of corrugated cardboard as the core of the slope body. It is an issue.

The invention according to claim 1 of the present invention is a portable slope used for traveling of a wheelchair over a step generated between objects,
It has a plate-shaped slope body whose upper surface is the running surface of the wheelchair,
In addition, the slope main body includes a plate-like core made of a corrugated cardboard material, and a reinforcing layer made of a fiber-reinforced resin material attached to at least the upper and lower surfaces of the plate-like core.

  According to a second aspect of the present invention, in the corrugated cardboard material forming the plate-shaped core, the liner and the core are alternately stacked in the length direction or the width direction of the slope main body, and the gap portion between the liner and the core is formed. It is characterized by including a corrugated board body formed in a direction penetrating vertically.

  According to a third aspect of the present invention, the corrugated board material forming the plate-like core includes a corrugated board main body comprising a honeycomb core formed such that the cores are combined in a honeycomb shape and the honeycomb-shaped void portion is vertically penetrated. It is a feature.

  According to a fourth aspect of the present invention, the plate-like core is characterized in that the surface is subjected to water-resistant treatment.

  According to a fifth aspect of the present invention, side walls for preventing wheel removal extending in the length direction are formed integrally with the slope body at both side edges in the width direction of the slope body.

  Further, in claim 6, the slope main body and the side wall are set in a mold in which carbon fiber and / or glass fiber is wound around the surface of the plate core, respectively, and from the group of polyethylene, polyester and vinyl ester It is characterized in that it is integrally formed by pouring at least one selected resin into the mold.

  In the portable slope according to the present invention, the slope body includes a laminated structure including a plate-like core made of a corrugated cardboard material and a reinforcing layer made of a fiber-reinforced resin material attached to at least the upper and lower surfaces of the plate-like core. Is formed by.

  Therefore, as compared with the case where foamed polyurethane is used as the plate-like core, it is possible to further reduce the weight while ensuring the necessary rigidity and strength, and to further reduce the burden on the user.

It is a perspective view which shows one Example of the portable slope of this invention. It is a perspective view which expands and shows the part. (A) is the side view which looked at the portable slope from the length direction one end side, (B) is the side view which shows the folded state. It is sectional drawing which shows a slope main body notionally It is a disassembled perspective view which shows a plate-shaped core. (A), (B) is a fragmentary perspective view which shows a part of plate-shaped core for side walls.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the portable slope 1 of the present embodiment is used for running a wheelchair over a step formed between objects having different heights, and the upper surface 2 a is a running surface of the wheelchair. At least a plate-like slope body 2 is provided. In this example, the portable slope 1 includes a rectangular plate-like slope body 2 that is long in the running direction of the wheelchair, and a side wall 3 that prevents the wheel from falling off and extends in the lengthwise direction on both side edges in the width direction of the slope body 2. 3 together.

  In the portable slope 1, if the slope main body 2 is too short, when the portable slope 1 is passed over, the traveling surface may become steep and the usability may be deteriorated. On the other hand, if it is too long, it is inconvenient to carry and increases the weight. Therefore, the length L of the slope body 2 is preferably about 1500 to 3000 mm. The width W of the slope body 2 is preferably about 700 to 1100 mm in consideration of the width of the wheelchair.

  In this example, the slope main body 2 is formed of a plurality of slope pieces 2A and 2B arranged in the width direction, in this example, two pieces of slope pieces 2A and 2B divided into equal widths, and each of the slope pieces 2A and 2B is freely bendable. They are connected by a tape-like elastic sheet material 4.

  Therefore, as shown in FIG. 3B, the pair of slope pieces 2A and 2B can be folded at the side edges facing each other. In use, as shown in FIG. 3 (A), the sloped pieces 2A and 2B are unfolded and the side end faces are brought into contact with each other. can get. Note that the slope pieces 2A and 2B are preferably provided with, for example, a fastener such as a hook-and-loop fastener for maintaining the folded state, a handle (both not shown) for folding and transporting, and the like.

  One end S1 and the other end S2 in the length direction of the slope main body 2 are each formed in a tapered shape whose thickness gradually decreases toward the tip. Further, anti-slip rubber members R1 and R2 are attached to the lower surfaces of the one end S1 and the other end S2, respectively. Preferably, the rubber members R1 and R2 are arranged in a U shape covering the upper and lower surfaces of the one end S1 and the other end S2.

  The side wall 3 protrudes from the upper surface 2a of the slope body 2 to prevent the wheelchair from being removed. The protruding height h of the side wall 3 from the upper surface 2a is preferably 20 to 35 mm. The side wall 3 does not necessarily have to be formed over the entire length of the slope body 2 and may not be formed particularly on the one end S1 side and the other end S2 side of the slope body 2. In this case, the region Y that is not formed preferably has a distance L1 from the tip that is not more than 10% of the length L.

  Next, the portable slope 1 needs to have sufficient strength to be able to withstand even if the wheelchair passes over the step when it is passed over a step. Specifically, it is necessary to pass at least a load bearing test, a deflection amount and an endurance test based on JIS T9207 “Portable Slope for Wheelchairs”.

  Therefore, in order to reduce the weight while satisfying the durability test, in the portable slope 1 of the present invention, as shown conceptually in FIG. 6 and a laminated structure 8 including a reinforcing layer 7 made of a fiber reinforced resin material attached to at least an upper surface and a lower surface of the plate-like core 6. When the slope main body 2 is divided into a plurality of slope pieces 2A and 2B as in this example, each slope piece 2A and 2B is formed by the laminated structure 8 respectively.

  The corrugated cardboard material 5 forming the plate-like core 6 includes a corrugated cardboard body 9 as shown in FIG. As shown in the figure, the corrugated cardboard body 9 of this example has a structure in which liners 5a and corrugated cores 5b are alternately stacked in the length direction or width direction of the slope body 2, and the liner 5a and the inside A gap portion G between the core 5b and the core 5b is formed so as to penetrate vertically. The wave shape of the core 5b is not particularly limited, and may be appropriately selected such as a sine wave shape, a V-shaped wave shape, a rectangular wave shape, or a trapezoidal wave shape. In such a corrugated cardboard body 9, the liner 5a and the center core 5b are perpendicular to the upper surface 2a, and the waves of the center core 5b do not swing in the thickness direction. Therefore, excellent bending rigidity and strength with respect to the vertical load are exhibited. In particular, in this example, since the liner 5a and the core 5b are alternately laminated in the width direction, the bending rigidity and strength in the length direction can be increased.

  As the corrugated board main body 9, for example, a so-called honeycomb core in which the cores are combined in a honeycomb shape and the honeycomb-shaped void portion is formed so as to penetrate vertically can be adopted. Also in this case, excellent bending rigidity and strength with respect to the vertical load are exhibited.

  Further, the corrugated board material 5 of this example includes upper and lower liners 10 which are attached to the upper and lower parts of the corrugated board main body 9 and close the opening of the gap portion G. The upper and lower liners 10 further increase the rigidity of the corrugated board material 5 and serve to distribute the load from the wheels.

  Here, various conventional paper materials can be used as the liners 5a, 10 and the core 5b. However, as is well known, the paper material absorbs water and moisture to cause a decrease in strength. Therefore, it is preferable that the surface of the plate-like core 6 is subjected to water resistance treatment. The water-resistant treatment is not particularly restricted, but for example, a waterproof material such as paraffin is coated on the surfaces of the liners 5a, 10 and the core 5b, and a water-resistant resin agent is used as an adhesive paste. Etc.

  The fiber reinforced resin material forming the reinforcing layer 7 is composed of reinforcing fibers 11 disposed on at least the upper and lower surfaces of the plate-like core 6 and a matrix resin 12 that solidifies and holds them together. The reinforcing fibers 11 are preferably arranged on the entire circumference of the plate core 6.

  Examples of the reinforcing fibers 11 include inorganic fibers such as carbon fibers, glass fibers, boron fibers, alumina fibers, potassium titanate fibers, silica fibers or zirconia fibers, wholly aromatic polyamide fibers, wholly aromatic polyester fibers, and ultrahigh molecular weight polyethylene. Fibers, organic fibers such as high-strength vinylon fibers or high-strength acrylic fibers, whiskers such as graphite, silicon nitride, or potassium titanate are preferably used. Especially, it is preferable from a viewpoint of production technology to use carbon fiber or glass fiber.

  The reinforcing fibers 11 can be arranged in the length direction and / or the width direction. In particular, when these arrangements are combined, it is desirable in that the bending strength and surface pressure resistance of the entire slope can be further improved.

  Further, as the matrix resin 12, for example, thermosetting resin such as polyester, epoxy, phenol or polyimide, polyamide, polycarbonate, polypropylene, polybutylene terephthalate, polyphenylene sulfide, polyethersulfone, polyetheretherketone, polyamideimide or the like A plastic resin is preferably used. Among these, it is preferable from the viewpoint of strength and production technology to use at least one kind of resin selected from the group of polyethylene, polyester and vinyl ester.

  Such a slope body 2 (when the slope body 2 is divided into a plurality of slope pieces 2A and 2B, each slope piece 2A and 2B) is obtained by winding reinforcing fibers 11 around the surface of the plate-like core 6. Is set in the mold, and the matrix resin 12 is poured into the mold.

  The side wall 3 is not particularly restricted, but a laminated structure 8 similar to the slope body 2 is preferably used. That is, as shown in FIG. 4, it can be formed of a plate-like core 6 made of a corrugated cardboard material 5 and a reinforcing layer 7 made of a fiber reinforced resin material attached around it. However, in the corrugated cardboard material 5 on the side wall 3, as shown in FIG. 6 (A), the gap portion G between the liner 5a and the center core 5b may be formed so as to penetrate vertically. As shown in (B), the gap G may be penetrated in the length direction.

  The side wall 3 has a small volume and occupies a small proportion of the entire portable slope. Therefore, in the case of the plate-like core 6 for the side wall 3, it is not necessary to form the corrugated board material 5 as described above, and for example, foamed polyurethane can be used.

  When the portable slope 1 includes the slope body 2 and the side wall 3, the reinforcing core 11 is wound around the surface of the plate core 6 for the slope body 2, and the plate core for the side wall 3. The slope body and the side wall 3 can be integrally formed by setting the surface of 6 with the reinforcing fiber 11 wound in a mold and pouring the matrix resin 12 into the mold.

  In this case, it is preferable from the viewpoint of productivity to use a prepreg in which the uncured matrix resin 12 and the reinforcing fibers 11 are combined in advance in a sheet shape.

  Specifically, a prepreg wound around the surface of the plate core 6 for the slope body 2 and a prepreg wound around the surface of the plate core 6 for the side wall 3 are set in the mold, By press molding, the matrix resin 12 in the prepreg is melt-cured, and the slope body 2 and the side wall 3 can be integrated.

  In such a portable slope 1, the thickness t of the slope body 2 is reduced to 15 to 30 mm to reduce the weight, but sufficient bending resistance is ensured even when a general wheelchair travels.

  As mentioned above, although embodiment of this invention was explained in full detail, it cannot be overemphasized that this invention is not limited to the said embodiment, It can deform | transform into a various aspect and can be implemented.

  In order to confirm the effect of the present invention, a portable slope having the basic structure shown in FIGS. 1 to 5 was made on the basis of the following specifications, load resistance, durability, deflection resistance, remaining deflection amount, weight. Tested about. The same test was performed on a portable slope of a comparative example using foamed polyurethane as a plate-like core, and the performances were compared. The test results are shown in Table 1.

  Example products and comparative product products are set in a mold in which a prepreg is wound around the surface of the plate core for the slope body and a prepreg wrapped around the surface of the plate core for the side walls. Then, a pair of slope pieces in which the slope body and the side wall are integrated are formed by press molding.

  As the prepreg, a first prepreg in which a glass fiber was impregnated with a polyethylene resin and a second prepreg in which a carbon fiber was impregnated with a polyethylene resin were used. Then, the first prepreg and the second prepreg are sequentially wound around the surface of the plate-like core to form a two-layer reinforcing layer.

Moreover, each slope piece was connected so that folding was possible with the tape-shaped nylon cloth. Further, a rubber member was fixed to the tip of each slope piece with an adhesive, and a portable handle (made of nylon resin) was attached with a rivet. Detailed specifications are as follows.
Slope body length L: 2000 mm
Slope body width W: 750 mm
Tensile modulus of carbon fiber: 24 (GPa)
Tensile modulus of glass fiber: 24 (GPa)
Slope body thickness t: 15 mm
Side wall protrusion height h: 25 mm

(1) Load capacity, durability, deflection resistance, remaining deflection:
The load resistance, durability, deflection resistance, and remaining deflection amount were measured in accordance with JIS T 9207 “Portable Slope for Wheelchairs”.

(2) Weight:
Measured with an electronic balance.

  As a result of the test, it was confirmed that the portable slope of the example achieved a weight reduction of 2 kg while ensuring the same level of performance as compared with the comparative example using foamed polyurethane as the plate-like core.

DESCRIPTION OF SYMBOLS 1 Portable slope 2 Slope main body 2a Upper surface 3 Side wall 5 Corrugated cardboard material 5a Liner 5b Middle core 6 Plate-shaped core 7 Reinforcement layer 9 Corrugated cardboard main body G Gap part

Claims (6)

It is a portable slope that is used to run a wheelchair over a step formed between objects,
It has a plate-shaped slope body whose upper surface is the running surface of the wheelchair,
In addition, the slope main body includes a plate-like core made of a corrugated cardboard material and a reinforcing layer made of a fiber-reinforced resin material attached to at least the upper and lower surfaces of the plate-like core.   In the corrugated cardboard material forming the plate-like core, the liner and the corrugated inner core are alternately laminated in the length direction or the width direction of the slope body, and the gap portion between the liner and the inner core penetrates vertically. The portable slope according to claim 1, further comprising a corrugated cardboard body formed in an orientation.   The corrugated cardboard material forming the plate-like core includes a corrugated cardboard body including a honeycomb core formed such that the cores are combined in a honeycomb shape and the honeycomb-shaped void portion is vertically penetrated. The portable slope as described.   The portable slope according to any one of claims 1 to 3, wherein the plate-like core has a water-resistant treatment on a surface thereof.   The portable slope according to any one of claims 1 to 4, wherein side walls for preventing wheel removal extending in the length direction are formed integrally with the slope body on both side edges in the width direction of the slope body. The slope body and the side wall are each set in a mold in which carbon fiber and / or glass fiber is wound around the surface of a plate-like core, and at least one kind selected from the group of polyethylene, polyester and vinyl ester 6. The portable slope according to claim 5, wherein the resin is integrally formed by pouring the resin into the mold.

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