JP2002021302A - Height variable indoor slope for difference in level - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a height variable indoor slope for difference in level conformable to differences in level having various heights and allowing a wheelchair or the like to smoothly pass over a difference in level. SOLUTION: This height variable indoor slope for difference in level adapts the following characteristic constituting means: an intermediate part 2 is interposed between a wedge-like tip part 1 and a tail end part 3 through connecting joints 4 and 5 so as to be capable of forming one inclined surface body having a flat right triangular side surface, and fitting dovetail grooves 51 and 53 are formed in the lower connecting surfaces 11 and 13 of the connecting joints 4 and 5, extending over the whole width (d) direction; fitting protruding parts 52 and 54 formed extending over the whole width (d) direction of the higher connecting surfaces 12 and 14 are fitted to and separated from the fitting dovetail grooves 51 and 53 as occasion demands to oppositely set a rear end surface 17 along a difference in level part 20 in such a manner as to be adjustable to the height of a difference in level surface 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope for buffering a step at an entrance or a sill in an indoor bathroom and a step at various facilities in a station or the like, and more particularly to a step having various heights. In addition, the present invention relates to an indoor slope for a variable step that enables a wheelchair or the like to smoothly pass through the step.

[0002]

2. Description of the Related Art In a house where the elderly and the disabled live, a step at an entrance or a threshold of a bathroom becomes a hindrance to living behavior. In addition, there are steps in places such as the premises of stations, making it difficult for elderly and disabled people to pass.
Such a step not only hinders movement by a wheelchair, but also causes an injury by being caught on a foot during walking.

[0003] Conventionally, in order to buffer such a step, a slope has been made by cutting a piece of wood into a flat right-angled triangle in accordance with the height of the step.
Also, ramps made of plastic or wood are on sale.

[0004]

However, in order to create a slope from a piece of wood, the height of the step must be adjusted according to the height of the step.
Wood pieces had to be cut diagonally, tools such as canna were required, and skills and labor were also required.

[0005] In addition, the length of any of the conventional slopes made of plastic or wood can be easily adjusted by cutting with a saw or the like, but the height of the slope is adjusted to match the step. It was not easy.

[0006] If the height of the slope does not match the height of the step, the wheel of the wheelchair is caught at the joint between the slope and the step, which hinders smooth movement in the wheelchair. In addition, even when walking, the foot may be caught at the joint between the slope and the step, which may cause injury.

Conventionally, ramps made of plastic or wood that are conventionally sold are heavy for elderly or disabled persons to move the ramps themselves, and have relatively large external dimensions, taking into consideration storage space. There was nothing. The conventional slope has no pattern on its surface, and there is no one that fully considers the appearance.
Moreover, wood or hard plastic is slippery and movable and lacks fixability, causing scratches on the flooring of the flooring board, and a single piece of wood is likely to be warped due to drying.

Here, the main objects to be solved by the present invention are as follows. That is, a first object of the present invention is to provide an indoor slope for a variable height step that can be adjusted to correspond to steps having various heights and enables a wheelchair or the like to smoothly pass through the steps. It is assumed that.

A second object of the present invention is to provide an indoor slope for a variable height step, which is lightweight and enables an elderly or a disabled person to easily install and move the slope by himself. It is.

A third object of the present invention is to provide an indoor slope for a variable height step capable of reducing a storage space.

A fourth object of the present invention is to provide an indoor slope for a variable height step which is hard to slip, has good fixability, is sufficiently considered in aesthetics, and can improve the indoor atmosphere. Things.

Other objects of the present invention will become apparent from the description of the specification, the drawings, and particularly the description of each claim in the claims.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, there is provided a joint seam formed in such a manner as to be freely connectable and separable over the entire width of a side surface measuring height portion of a slope exhibiting a flattened right-angled triangle with an inclined angle. , And the joining seam is combined or separated in accordance with the step, thereby making it possible to set and adjust the step absorption.

More specifically, in solving the problem, the present invention employs a new characteristic configuration means ranging from a high-level concept to a low-level concept listed below.
This is done to achieve the above objectives.

That is, a first feature of the present invention is that a joint seam formed so as to be freely connectable and separable over the entire width of a predetermined side surface of a slope having a side surface flat right triangle having a predetermined inclination angle is formed in parallel. It is in the adoption of the configuration of the indoor slope for the variable height step.

A second feature of the present invention is the first feature of the present invention.
In the feature described in the above, the connection-separable formation extends the fitting groove over the entire length of the joining seam in the width direction of the low-side joint surface and fits into the fitting groove over the entire length of the joint surface in the width direction of the high-side joint surface. The present invention is directed to the adoption of an indoor slope for a variable height step formed by extending a fitting ridge so as to be capable of fitting both sexes.

A third feature of the present invention is the first feature of the present invention.
The joints are formed so as to be capable of being connected and separated over the entire length of the joining seam in the height direction of the low-side joint surface. Another object of the present invention is to adopt a configuration of an indoor slope for a variable height step in which fitting ridges corresponding to the fitting grooves are formed so as to extend in parallel with an interval so as to be capable of fitting male and female.

According to a fourth aspect of the present invention, there is provided an indoor slope for a variable height step in which the predetermined height portion of the side surface in the first, second or third aspect of the present invention is 15 mm or 30 mm. It is in.

A fifth feature of the present invention is that the predetermined inclination angle in the first, second, third or fourth feature of the present invention is such that the height of the side surface is 35 mm from the vertex of the side surface height to the bottom of the side surface. The present invention employs a configuration of an indoor slope for a variable height step, which is an angle formed by a hypotenuse passing through each vertex of a predetermined height of 15 mm and 30 mm.

A sixth feature of the present invention is that the joint according to the first, second, third, fourth or fifth feature of the present invention is such that the top edge of the low-side joint surface of the joint is provided. The present invention lies in the adoption of an indoor slope for a variable height step formed by chamfering a round shape.

A seventh feature of the present invention is that the slope according to the first, second, third, fourth, fifth or sixth feature of the present invention is such that the slope in the width direction of the rearmost top edge portion is equal to the total length in the width direction. The present invention employs a configuration of an indoor slope for a variable height step which is rounded by chamfering.

An eighth feature of the present invention is that the fitting groove and the fitting ridge in the second, third, fourth, fifth, sixth or seventh feature of the present invention have a cross section of: Ants, round,
An indoor slope for a variable height step formed in any of a polygonal shape, a hook shape, a T shape, and an arrow shape is adopted.

A ninth feature of the present invention is that the slope in the first, second, third, fourth, fifth, sixth, seventh or eighth feature of the present invention is provided with a plurality of slopes on the bottom surface. The present invention resides in the adoption of a configuration of an indoor slope for a variable height step having a recess formed therein.

A tenth feature of the present invention is that the slope in the first, second, third, fourth, fifth, sixth, seventh, eighth, or ninth feature of the present invention is a plastic. Of the indoor slope for a variable height step mainly comprising a mixture of rubber and rubber.

An eleventh feature of the present invention resides in that the rubber according to the tenth feature of the present invention is configured as an indoor slope for a variable height step comprising at least one of natural rubber and synthetic rubber.

A twelfth feature of the present invention resides in that the plastic in the tenth or eleventh feature of the present invention is a styrene-butadiene (SBR) indoor slope for a variable height step.

According to a thirteenth feature of the present invention, there is provided an indoor slope for a variable height step, wherein the mixture of the plastic and the rubber according to the tenth feature of the present invention is ethylene-propylene rubber (EPDM). It is in.

A fourteenth feature of the present invention is the configuration of an indoor slope for a variable height step to which the main component in the tenth, eleventh, twelfth or thirteenth feature of the present invention is added calcium bicarbonate. In hiring.

[0029]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described.

In the present invention, the wedge-shaped front end portion 1, the intermediate portion 2, and the adjacent rearmost portion 3 are sequentially joined together by a joint seam 4 formed so as to be freely connectable and separable. It presents a right-angled triangle, and the rear end face of the vertical side is arranged along the step portion 20 to provide an indoor slope for a variable height step. In the present embodiment, the inclined surface of the hypotenuse is provided. Although a continuous straight plane will be described as a representative example, the present invention is not limited to these, and a continuous curved surface curved to some extent may be used.

FIG. 1 is a perspective view of this embodiment, and FIG. 2 is a side view of this embodiment. FIG. 3 is a detailed partial enlarged side view of a portion A in FIG. The indoor slope for a variable height step according to the present embodiment is composed of a wedge-shaped tip part 1, an intermediate part 2, and a maximum rear part 3.

Then, the wedge-shaped front end portion 1, the intermediate portion 2, and the highest rear portion 3 are integrally formed to form an inclined plane body having a flat right-angled triangular shape, and the rear end face of the vertical side has an equal height step. By being disposed in contact with the step surface 21 of the portion 20, the step portion 20 is provided.
Slope. In addition, as the step part 20,
For example, indoor threshold or steps at the bathroom entrance,
In addition, steps and the like in the premises of stations and the like correspond.

As shown in FIG. 3, a dovetail groove 51 is provided on the lower joining surface 11 of the joining seam 4 in the wedge-shaped tip portion 1. Low-side joining surface 11 of wedge-shaped tip 1 in intermediate portion 2
On the high-side joining surface 12 facing the front end, a fitting ridge 52 is formed to extend over the entire length in the width direction. The cross-sectional shape of the fitting ridge 52 is a cross-sectional shape that can be freely fitted in correspondence with the shape of the dovetail groove 51 formed to extend over the entire length in the width direction of the low-side joint surface 11.

Therefore, the fitting ridge 52 of the intermediate portion 2 and the high-side joint surface 12 of the joint 4 is fitted into the dovetail groove 51 of the low-side joint surface 11 of the wedge-shaped tip portion 1 of the joint seam 4. The joining surface 11 and the high-side joining surface 12 are removably joined to each other, and the wedge-shaped tip portion 1 and the intermediate portion 2 are detachably fitted to each other to form a continuous integral side surface flat right-angled triangular inclined surface body. .

Further, the intermediate portion 2 is provided with a dovetail groove 53 which is fitted to the lower joint surface 13 of the joint seam 5 over the entire length in the width direction. The dovetail groove 53 of the low-side joint surface 13 has the same shape as the dovetail groove 51 of the low-side joint surface 11 shown in FIG. On the high joining surface 14 of the joining seam 5 at the highest rear portion 3, a fitting ridge 54 is provided over the entire length in the width direction. The fitting ridge 54 has a shape corresponding to the cross-sectional shape of the dovetail groove 53 of the lower joining surface 13 of the intermediate portion 2 of the joining seam 5.
The fitting ridge 54 has the same shape as the fitting ridge 52 of the high-side joint surface 12 of the joint 4 shown in FIG.

Accordingly, by fitting the convex portion 54 of the highest rear portion 3 of the joint seam 5 into the dovetail groove 53 of the intermediate portion 2 low-side joint surface 13 of the joint seam 5, the adjacent intermediate portion 2 and the highest rear part 3 are joined so as to be freely detachable. In this way, the wedge-shaped front end portion 1, the intermediate portion 2, and the highest rear portion 3 are removably fitted to each other to form a continuous side surface flat right-angled triangular inclined surface body.

As a result, as shown in FIGS. 1 and 2, one inclined surface body composed of the wedge-shaped front portion 1, the intermediate portion 2 and the highest rear portion 3 is arranged in contact with the step surface 21 of the step portion 20. Thus, the slope body becomes a slope with respect to the step portion 20 having the height H3.

Here, the height of the step portion 20 is set to the intermediate height H2.
In the case of, one inclined plane body composed of the wedge-shaped tip part 1 and the intermediate part 2 is arranged in contact with the stepped surface 21 of the stepped part 20 so that the inclined plane body has the height H2. Slope. Further, when the height of the step portion 20 is lower and the height is H1, one inclined surface body formed only by the wedge-shaped tip portion 1 is disposed in contact with the step surface 21 of the step portion 20 so as to be in contact therewith. The inclined plane forms a slope with respect to the step 20 having the height H1.

In the case of a house from the architectural standard, H1
= 15 mm, H2 = 30 mm, and H3 = 35 mm.
From the rear surface height H3 apex of the highest rear part 3 to the bottom of the side surface, it is the angle formed by the H2 apex of the joint seams 4 and 5 and the hypotenuse passing through the H1 apex, and the width is preferably about 600 mm in correspondence with the wheelchair. It is.

FIG. 4 is a side view showing another embodiment of the present invention. As shown in this figure, when the height of the step portion 20 'is higher than the height H3, such as inward of a station or the like, the wedge-shaped tip 1, the first intermediate portion 2', and the second intermediate portion. A single sided flat right-angled triangular inclined body composed of 2 ″ and the highest rear portion 3 ′ is placed adjacent to the stepped surface 21 ′ of the stepped portion 20 ′ at the same height so as to be in contact with the inclined surface. The slope for the step 20 'of H4 is used.

Here, the shape of the highest rear portion 3 'is similar to the shape of the highest rear portion 3 for the house. A dovetail groove 55 is provided in the second intermediate portion 2 ″ low side joint surface 15 of the joint seam 6. The dovetail groove of the low side joint surface 15 is formed on the low side joint surface 11 shown in FIG. It has the same shape as the fitting dovetail groove 51.

A fitting ridge 56 is provided on the highest joint surface 16 of the highest joint 3 at the highest joint 3 '. The fitting ridge 56 is connected to the first intermediate portion 2 ′
Has a cross-sectional shape corresponding to the shape of the dovetail groove 55. Further, the fitting ridge 56 is provided on the high-side joining surface 12 shown in FIG.
Has the same shape as the fitting ridge 52.

Therefore, the second intermediate portion 2 "of the coupling seam 6" is fitted into the dovetail groove 55 of the low-side joint surface 15 by the fitting ridge 56 of the high-side joint surface 16 of the highest rear portion 3 '. The part 2 "and the highest rear part 3 'are removably joined. In this manner, the wedge-shaped tip portion 1, the first intermediate portion 2 ', the second intermediate portion 2 ", and the highest rear portion 3' are releasably fitted into one inclined flat body of a flat right-angled triangle.

As a result, as shown in FIG. 4, a single inclined surface body composed of the wedge-shaped front end portion 1, the first intermediate portion 2 ', the second intermediate portion 2 "and the highest rear portion 3' is formed as a step surface of the step portion 20 '. 2
By arranging it alongside 1 ', the inclined surface body becomes a slope with respect to the step portion 20' having the height H4.

A step portion 20 'installed on the premises such as a station, a step surface 21'
, That is, the height of the highest rear end face 17 of the highest rear portion 3 'is, for example, 40 mm. The side height H3 of the joint seam 6 is, for example, 35 mm. The side height of the joint 5 is, for example, 30 mm. The side height of the joint 4 is, for example, 15 mm.

The width d (see FIG. 1) in the width direction of each of the wedge-shaped tip portion 1, the first middle portion 2 ', the second middle portion 2 "and the highest rear portion 3' is, for example, 600 mm.

The dovetail grooves 51, 53, provided in the wedge-shaped tip part 1, the first intermediate part 2 'and the second intermediate part 2 ", respectively.
55 is a lower joint surface 11, 13, of the joint seams 4, 5, 6;
15 are provided over the entire length in the width direction (direction of width d). Also, the fitting ridges 52, 54, 56 provided on the first intermediate portion 2 ', the second intermediate portion "and the highest rear portion 3' are also provided with the high-side joint surfaces 12, 14, 16 are provided over the entire length in the width direction (direction of width d).

The fitting ridge 52 is formed by the fitting ridge 5.
A position where the high-side joint surface 12 of the joint seam 4 where the joint 2 is provided and the low-side joint surface 11 of the joint seam 4 where the mating dovetail groove 51 of the mating partner is provided are joined with substantially the entire surface. Is provided. Further, the fitting ridge 54 is formed on the high-side joining surface 14 of the joining seam 5 where the fitting ridge 54 is provided.
Joint seam 5 provided with a dovetail groove 53 for mating with the joint
Is provided at a position where the low-side bonding surface 13 is bonded with substantially the entire surface.

Further, the fitting ridge 56 is
At the position where the high side joint surface 16 of the joint seam 6 provided with the joint and the low side joint surface 15 of the joint seam 6 provided with the dovetail groove 55 of the mating partner are joined with substantially the entire surface. , Is provided.

On the other hand, the dovetail grooves 51, 53, and 55 are the low-side joint surfaces 11, 13, 15 of the joint seams 4, 5, and 6.
May be provided in parallel at intervals along the direction orthogonal to the width direction (direction of the width d), that is, the height direction of the low-side joint surfaces 11, 13, and 15. In this case, the fitting ridges 52, 54, 56 are also spaced along the direction orthogonal to the width direction (direction of the width d) of the high-side joint surfaces 12, 14, 16 of the joint seams 4, 5, 6. And a plurality of them are provided in parallel.

Then, each fitting ridge 52, 54,
56 is provided with the high-side joint surfaces 12, 14, 16 of the joint seams 4, 5, 6 provided with the fitting ridges 52, 54, 56, and the fitting dovetail grooves 51, 53, 55 of the mating partner, respectively. Joining surfaces 11, 13, of the joining seams 4, 5, 6
15 are provided at positions where they are joined with substantially the entire surface.

The top edge of the lower joint surface 11 of the joint 4 at the wedge-shaped tip 1 is chamfered over the entire length in the width direction, and is formed so as to be rounded in the width direction. That is, when the wedge-shaped tip 1 and the first intermediate part 2 'are fitted to each other to form a slope by forming one slope, a joint seam 4 between the wedge-shaped tip part 1 and the first intermediate part 2' is formed. This is a portion that is chamfered over the entire length in the width direction of the top edge portion of the low-side joint surface 11 on the slope to have a roundness 61.

Similarly, the total length in the width direction of the top edge of the low-side joint surface 13 of the joint 5 at the first intermediate portion 2 ′, and the total length in the width direction of the low-side joint surface 15 of the joint 6 at the second intermediate portion ″ , The total length in the width direction of the top edge of the rear end face 17 at the highest rear portion 3 'is also rounded along the width direction.
2, 63, 64 are formed.

As a result, the slope for variable steps on the premises, such as a station, according to the embodiment of the present invention has a smooth wheelchair even when a small step occurs at the joint portion of each member of the slope due to the uneven installation surface or the like. It is possible to pass through. In particular, in the variable step slope according to the present embodiment, when a wheelchair or the like rises from a low position and passes through the back, the wheels can smoothly pass without being caught at the joints 4, 5, and 6 portions. .

FIG. 5 is a bottom view of the embodiment shown in FIG. The bottom view is a bottom view when an indoor slope for a variable height step is formed by the wedge-shaped front part 1, the middle part 2, and the highest rear part 3. Each of the members of the wedge-shaped tip part 1, the middle part 2 and the highest rear part 3 is provided with a plurality of concave holes 70 on the bottom surface. The concave hole 70 has a concave shape, and is formed for the purpose of reducing the weight of each member and reducing the amount of expensive materials used to form each member.

As a result, the indoor slope for variable height steps of this embodiment is easy to install and store even for the elderly and the disabled. Note that characters such as “ABC” may be formed in a concave shape on the bottom surface of each member instead of the concave hole 70. Further, the concave shape such as the concave hole 70 and the character may not be formed, but may be a flat surface.

Next, the beauty of the indoor slope for variable height steps of this embodiment will be described. Wedge-shaped tip 1, middle 2
Or the first intermediate part 2 ', the second intermediate part "and the highest rear part 3,
3 'has a pattern printed on the surface by predetermined printing or the like. The pattern is, for example, a wood grain pattern for a house, and the color is a tree color. As a result, the indoor slope for variable height steps according to the present embodiment provides a sense of security, stability and gorgeousness in a room or the like, and is valuable as an interior. For interiors such as stations, select patterns and colors that match the installation environment.

Next, the material of the indoor slope for variable height steps of this embodiment will be described. Wedge-shaped tip 1, middle 2
Or the first intermediate part 2 ', the second intermediate part 2 ", the highest rear part 3,
3 'is formed mainly of plastic and rubber. Preferably, ethylene butadiene and rubber may be mainly used. Here, natural rubber or synthetic rubber is used as the rubber. Further, ethylene-propylene rubber (EPDM) may be used as a main component. Use of rubber increases elasticity and fixability.

Ethylene-propylene rubber (EPDM) is a rubber (E) composed of a copolymer of ethylene and propylene.
PR) and a rubber (EPD) obtained by polymerizing a small amount of a diene such as ethylidene norbornene as a third component on EPR.
M), which is excellent in weather resistance and ozone resistance against ultraviolet rays and the like from outside.

Further, each member of the indoor slope for variable height steps of this embodiment is formed by adding calcium bicarbonate to the above-mentioned main component (rubber). Thereby, it is possible to increase the specific gravity of each member at a low cost to give a certain weight, and to improve the stability at the time of installation. In addition, as shown in FIG. 5, by forming the concave hole 70, the formation time (baking time) of each member can be shortened, and generation of bubbles in each member can be prevented.

As described above, the typical embodiments of the present invention have been described, but the present invention is not necessarily limited to the above-mentioned items. Modifications can be made as appropriate within the scope of achieving the object of the present invention and achieving the following effects. For example, the number of structural members constituting the indoor slope for variable height steps according to the present invention may be a wedge-shaped tip 1, a first intermediate part 2 ', a second intermediate The component is not limited to four or less, ie, the portion 2 ″ and the highest rear portion 3 ′, and it is possible to use five or more connecting members as components.

Further, the case where the cross-sectional shape of the fitting concave groove and the fitting ridge in this embodiment is exclusively dovetailed will be described. However, even if the cross-section is round, regular polygonal, T-shaped, hook-shaped or arrow-shaped, strong coupling is possible. It does not matter if it is a male and female coupling type that can be easily separated.

[0063]

As described above, according to the present invention,
Adjacent members of each component are fitted and releasably joined using male and female connections of fitting grooves and fitting ridges to form a single inclined surface body, so it can be used on site even at steps with various heights It is possible, and it becomes possible for a wheelchair or the like to smoothly pass through a step.

Further, since the constituent members can be easily detached from each other, when the indoor slope for the variable height step is stored, it can be disassembled and stored in each constituent member to reduce the storage space. Becomes

Further, by applying a grain pattern, color, or the like to the surface of the inclined body, it is possible to improve the atmosphere in the room or the like without compromising the aesthetic feeling, in conformity with the environment in the room or the like.

Further, by using a rubber as a main component such as a blend of a plastic and a rubber, it has an affinity for wheelchair wheel rubber, has an excellent fixing property when installed, and has a lightweight structure. Therefore, assembling and disassembling at the site is easy without any tools, and the elderly and disabled persons can easily install and move the slope by themselves. In addition, the foot is also good, and even if a person falls down or hits the foot on the indoor slope for variable height steps, it is rubber and soft, so it is possible to prevent injury. It has excellent effects.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a detailed partial enlarged side view of a portion A in FIG. 2;

FIG. 4 is a side view showing another embodiment of the present invention.

FIG. 5 is a bottom view of the embodiment shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wedge-shaped tip part 2 ... Middle part 2 '... First middle part 2 "... Second middle part 3, 3' ... Highest rear part 4, 5, 6 ... Joint seam 11, 13, 15 ... Low side joint surface 12, 14, 16 high-side joining surface 17 rear end surface 20, 20 'step portion 21, 21' step surface 51, 53, 55 fitting dovetail 52, 54, 56 fitting ridge 61, 62, 63, 64: roundness 70: concave hole α: inclination angle d: width H1, H2, H3, H4: height

Claims (14)

[Claims] 1. A height characterized in that a joint seam formed so as to be connectable and separable over the entire width of a predetermined height portion of a side surface of a slope having a side surface flat right-angled triangle having a predetermined inclination angle is formed so as to extend in parallel. Indoor slope for variable steps. 2. The connecting separable form includes extending the fitting groove over the entire length of the joining seam in the width direction of the lower joining surface and fitting the fitting groove along the entire length of the joining seam in the width direction of the joining surface. The indoor slope for a height-variable step according to claim 1, wherein the fitting ridge is extended and formed so as to be able to fit between male and female. 3. The joint-separable formation includes fitting grooves extending in parallel along the entire length of the lower joint surface in the height direction of the joint seam at intervals, and extending along the entire length of the higher joint surface in the height direction. 2. The indoor slope for a variable height step according to claim 1, wherein the fitting ridges corresponding to the fitting concave grooves are formed so as to extend in parallel with an interval therebetween so as to be freely male and female. 4. The indoor slope for a variable height step according to claim 1, wherein the predetermined height side portions are 15 mm and 30 mm. 5. The method according to claim 1, wherein the predetermined angle of inclination is an angle formed by a hypotenuse passing from a vertex of a side surface height of 35 mm to a vertex of the side surface predetermined height of 15 mm and 30 mm with respect to a bottom of the side surface. Item 5. The indoor slope for a variable height step according to item 1, 2, 3 or 4. 6. The joint according to claim 1, wherein the joint is rounded by chamfering a top edge of a lower joint surface of the joint. Indoor slope for variable height steps. 7. The height according to claim 1, 2, 3, 4, 5, or 6, wherein the slope is rounded by chamfering over the entire length in the width direction of the top edge of the rearmost end. Indoor slope for variable steps. 8. The fitting groove and the fitting ridge have a cross-section formed in any of a dovetail shape, a round shape, a polygonal shape, a hook shape, a T shape, and an arrow shape. The indoor slope for a variable height step according to 2, 3, 4, 5, 6, or 7. 9. The height-variable step according to claim 1, wherein the slope has a plurality of concave holes formed in the bottom surface. For indoor slope. 10. The slope according to claim 1, wherein the slope is mainly composed of a mixture of plastic and rubber.
An indoor slope for a variable height step according to 8 or 9. 11. The indoor slope for variable height steps according to claim 10, wherein the rubber comprises at least one of natural rubber and synthetic rubber. 12. The indoor slope for variable height steps according to claim 10, wherein the plastic is styrene butadiene (SBR). 13. The indoor slope for variable height steps according to claim 10, wherein the mixture of the plastic and the rubber is ethylene-propylene rubber (EPDM). 14. The indoor slope for a variable height step according to claim 10, wherein the main component is calcium bicarbonate.