JP2002227366A - Step end cover for tread, and step end structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a step end cover for a tread that can acquire an excellent stepping sensation and sufficient durability. SOLUTION: This nosing cover 10 for the tread for covering a step end part 2a at the tread 2 of a wooden staircase 1 is provided with a cover body 11 having a step board 12 arranged along the upper face of the nosing 2a, a front cover plate 13 extending downward from the front end of the step board 12 and arranged along the front end face of the nosing 2a, and an inclined plate 14 extending downward, inclining slightly toward the back face side from the lower end of the front cover plate 13. The upper face of the step board 12 of the cover body 11 is provided with a rugged non-slip part 20 at the middle in a longitudinal direction, along the lateral direction. The cover body 11 is composed of a low foamed molding of hard ABS resin, and at least the tip of the projecting part of the non-slip part 20 is composed of an elastic layer 21 formed of thermoplastic elastomer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nose cover for covering a nose portion of a step board in, for example, a wooden indoor staircase of a general house, and a nose structure of such a step board.

[0002]

2. Description of the Related Art In wooden indoor stairs in a detached house,
A nose cover may be attached to a nose portion at a front end of a step board for the purpose of improving design and preventing slippage.

[0003] As such a nosing cover, a stepping plate arranged so as to cover the upper surface of the nosing portion, a front cover plate extending downward from the front end of the stepping plate and arranged so as to cover the front end surface of the nosing portion are provided. Are made of a hard or soft synthetic resin integrally molded.

[0004]

However, since the nose cover made of hard synthetic resin is harder than the wood constituting the step board, when the nose cover is stepped on the stairs when going up and down the stairs, the nose cover is placed on the sole of the foot. However, there is a problem that it is difficult to obtain a good feeling of stepping because of the hard feeling.

[0005] In addition, since the nose cover made of a soft synthetic resin is easily deformed and has a low tensile strength, cracks may be formed on the nose cover, for example, at the front edge of the tread plate or in the vicinity of the nose cover during repeated ascending and descending steps. May occur to cause partial peeling,
There was a problem that the durability was poor.

[0006] Regardless of whether hard or soft, synthetic resin nasal covers transmit heat more easily than wood. Therefore, when the nasal cover is stepped on, the sole of the resin has a unique coldness different from that of wood. I feel like this,
There was a problem that it was difficult to obtain good stepping comfort.

On the other hand, a nosing cover having a two-layer structure in which a soft synthetic resin surface layer is laminated on a hard synthetic resin back layer is also used. In this nosing cover, the soft synthetic resin alone is used. As in the case of the nose cover made of the molded article, there is a problem that the soft synthetic resin layer on the surface is inferior in durability and that it is difficult to obtain a good stepping feeling due to the cold characteristic of the resin.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a nose cover and a nose structure of a step plate which can obtain good stepping comfort and sufficient durability.

[0009]

According to a first aspect of the present invention, there is provided a nose cover of a step board for covering an area from the upper surface to the front end face of a step portion of a wooden step board. A stepping plate horizontally disposed along the upper surface of the portion, and a cover body having a front cover plate extending downward from the front end of the stepping plate and vertically disposed along the nose front end surface, At least in the middle in the front-rear direction on the tread plate upper surface of the cover main body, a non-slip portion having an uneven shape is provided along the left-right direction, and the tread plate of the cover main body is formed of a low-foam molding of a hard synthetic resin. In addition, the gist of the present invention is that at least the tip of the convex portion of the non-slip portion is formed of an elastic layer.

In the step nose cover of the step board according to the first aspect of the present invention, the step board of the cover body is formed of a resin foam molded body, so that the step nose cover can be formed to have the same appropriate hardness as the wood constituting the step board. Also, the heat transfer coefficient can be adjusted to be as low as that of wood by the internal voids and the air layer. Furthermore, since the stepping plate is made of a hard synthetic resin, it is possible to prevent partial peeling or cracking of the front edge of the stepping plate or the like even after long-term use.

In the first invention, acrylonitrile butadiene.
A resin selected from styrene (ABS) resin, polystyrene resin, polyolefin resin, phenol resin, and polyvinyl chloride resin can be suitably used.

In the first aspect of the present invention, the elastic layer may be formed of a polystyrene-based, polyolefin-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, polychlorocarbon-based, chlorinated polyethylene-based, or polyvinyl chloride-based thermal layer. Those selected from plastic elastomers can be suitably used.

[0013] In the first invention, the step board may include:
It is preferable to employ a foamed molded article having a foaming ratio of 1.2 to 2.0 times.

That is, when this configuration is adopted, the characteristics of the step board can be made more similar to the wood constituting the step board.

In the first aspect of the present invention, a first engagement piece is projected from a rear portion of a lower surface of the stepping plate, and a second engagement piece is projected from a lower end of a rear surface of the front cover plate. 1
The engaging piece is engaged with an engaging recess formed at the rear of the upper surface of the nosing portion, and the second engaging piece is engaged with the front end of the lower surface of the nosing portion. It is preferable to adopt a structure in which the first and second engagement pieces are sandwiched between the nose portions based on a force so that the cover body is attached to the nose portion.

In other words, when this configuration is adopted, the nose cover can be easily attached by simply inserting the nose cover into the nose portion by utilizing its own elastic force without using a troublesome fixing member such as an adhesive, a double-sided tape, a screw and the like. it can. Further, the nasal cover can be easily removed without performing a troublesome operation such as an operation of removing the adhesive and the double-sided tape, and an operation of removing a screw.

In the first aspect of the present invention, the foamed molded article as the step board contains 10 to 35% by weight of wood powder having a particle size of 100 mesh pass, or the foam molded article as the step board is provided. Hardness (measured by a C-type testing machine based on JIS K6301) is set to 80 to 95, or the hardness of the elastic layer position on the stepping board (C-type testing based on JIS K6301) It is even more preferable to adopt a configuration in which (measured value by the machine) is set to 60 to 80.

That is, when these configurations are adopted,
The characteristics of the step board can be more closely approximated to wood.

In the first aspect of the present invention, an inclined plate is provided at the lower end of the front cover plate so as to be inclined downward from the lower end toward the direction of the rear surface, and the inclined plate is disposed below the nosing portion. It is even more desirable to adopt a configuration made in this way.

In other words, when this configuration is adopted, the toes are guided by the outer surface of the inclined plate when climbing the stairs, so that the toes can be prevented from being caught on the lower surface of the stepped nose of the stepped plate. The lower surface is concealed and a good aesthetic appearance can be obtained.

On the other hand, according to the second aspect of the present invention, the area from the upper surface to the front end surface of the nosing portion of the wooden stepboard is defined by claim 1.
A nose structure of a step board covered with the nose cover according to any one of claims 9 to 9, wherein a concave step is formed in a mounting area of the stepping plate on an upper surface of the step, and inside the concave step. The gist is that the step board is arranged, and an upper surface of the step board is arranged in the same plane as an upper surface of the step board.

According to the second aspect of the present invention, the nose structure of the nose plate using the nose cover of the first invention is specified, and furthermore, a step plate of the nose cover is arranged in the concave step on the upper surface of the nose portion to step on the nose. Since the upper surface of the board is set to be flush with the upper surface of the step board, it is possible to reliably prevent the foot from tripping on the rear edge of the step board, for example, when descending a stair.

[0023]

FIG. 1 is a sectional view showing the vicinity of a nosing portion of a wooden indoor stair (1) to which a nosing cover (10) according to an embodiment of the present invention is applied, and FIG. 2 is an exploded sectional view thereof. 3
Is a perspective view showing a nose cover (10).

As shown in these figures, the nostril cover (10) includes a stepping plate (12), a front cover plate (13) extending downward from the front edge of the stepping plate (12), and a front cover. There is provided a cover body (11) made of a low-foam molded article of a hard synthetic resin integrally formed with an inclined plate (14) extending slightly downward from the lower end of the plate (13).

On the upper surface of the step board (12) of the nose cover (10), the front and rear direction of the step board (12) (FIG. 1)
In the middle region in the left and right direction (in the left-right direction toward the paper surface of FIG. 1), an uneven anti-slip portion (20) is formed continuously in the left-right direction of the tread plate (12) (the direction perpendicular to the paper surface of FIG. 1). ing. Further, as shown in FIG. 4, the tip of the convex portion of the non-slip portion (20) is configured as an elastic layer (21) by laminating and integrating an elastomer.

At the rear end of the lower surface of the step board (12), a first engaging piece (31) projecting downward and extending continuously in the left-right direction is integrally formed. This first engagement piece (3
On both front and rear sides of 1), the retaining portions (3
1a) is formed integrally. In addition, the front cover plate (1
A second engagement piece (32) that protrudes toward the rear surface and extends continuously in the left-right direction is integrally formed on the lower surface of the lower end of (3).

Further, on the lower surface of the lower end of the inclined plate (14), a folded piece (15) that protrudes to be folded back and extends continuously in the length direction is integrally formed.

On the other hand, the wooden stairs (1) to which the nose cover (10) is attached are composed of a horizontally arranged step plate (2),
On the lower surface of the front part of the step board (2), there is provided a riser plate (5) mounted in a vertical posture.

A concave step (3) is formed on the upper surface of the front end (step nose 2a) of the step plate (2), corresponding to the step plate (12) of the step nose cover (10). The depth of the concave step (3) is set to the same size as the thickness of the step board (12).

The concave step (3) has a nostril cover (1).
1) corresponding to the first engagement piece (31) of FIG.
(In the direction perpendicular to the plane of the drawing), a groove-shaped engaging recess (3a) is formed.

In the present embodiment, in order to attach the nostril cover (10) to such a wooden stair (1), first, the nostril cover (10) is connected to the step plate (12) by the step plate (2). The front cover plate (13) is further arranged along the front end surface of the nose portion (2a) in the concave step portion (3), and is fitted into the nose portion (2a).
The first engagement piece (31) is fitted into the engagement recess (3a) of the nose (2a), and the second engagement piece (32) is
It engages the front edge of the lower surface of the nose (2a). This allows
Due to the elastic force of the nose cover (10), the first and second engaging pieces (31) and (32) sandwich the nose portion (2a), and the nose cover (10) is connected to the nose portion (2a) of the step plate (2). ).

Since the cover body (11) is made of a resin foam molded body, the cover of the nostril cover (10) is formed to have an appropriate hardness similar to that of the wood forming the step board (2). However, due to internal voids and air layers, the thermal conductivity is as low as that of wood. For this reason, even when stepping on the nostril cover (10) when climbing up and down the stairs, the sole of the nostril cover (10) does not feel hard or the like, and a soft texture equivalent to that of wood is obtained. It is possible to feel warmth equivalent to wood, without feeling cold, and to obtain a good feeling of stepping.

Further, the nostril cover (1) in this embodiment
Since the cover body (11) of (0) is made of a hard synthetic resin, even if it is used for a long time, partial peeling or cracking hardly occurs, and sufficient durability can be obtained.

Further, since the elastic layer (21) is formed on the non-slip portion (20) on the upper surface of the step board (12),
When going up and down the stairs, the sole of the foot is in close contact with the elastic layer (21), so that slip can be surely prevented.

Further, a concave step (3) having the same depth as the thickness of the step board (12) is formed on the upper surface of the step nose of the step plate (2), and the step cover (10) is formed in the concave step (3). ) Stepping board (1)
2) is accommodated, so that the step board (1
The upper surface of 2) and the upper surface of the step board are arranged in the same plane. For this reason, when stepping up and down the stairs, especially when descending, the step board (12)
It is possible to reliably prevent the foot from tripping on the rear edge.

The nostril cover (10) of the present embodiment.
Since the nose portion (2a) of the step board (2) is sandwiched from both upper and lower sides by the first and second engagement pieces (31) and (32), the stepping plate (12) is ) Can be tightly closed, and the lifting of the step board (12) can be prevented, and a good appearance can be maintained.

Further, since the nose cover (10) is held between the nose portion (2a) by its own elastic force, unlike the case of using an adhesive, a double-sided tape, a screw or the like, the cover can be easily attached with one touch. The assembly work can be easily performed. In addition, when removing the nostril cover (10), troublesome operations such as removing the adhesive and the double-sided tape and removing the screws are not required, and the removing operation can be easily performed. The replacement work of the cover (10) can be easily performed.

In the present invention, the nostril cover (1) is used in combination with a fixing means such as an adhesive, a double-sided tape, and a screw.
Even if 0) is fixed to the step board (2), there is no problem.

In this embodiment, since the inclined plate (14) is provided at the lower end of the front cover plate (13),
When ascending the stairs (1), the toes are guided by the front surface of the inclined plate (14), so that the toes can be prevented from being caught on the lower surface (return portion) of the step nose and the inclined plate. (14) hides the look-back part,
A good aesthetic appearance can be obtained even if makeup is not applied to the facing portion.

In this embodiment, the hard synthetic resin constituting the cover body (11) of the nostril cover (10) is acrylonitrile-butadiene-styrene (ABS) resin, polystyrene resin, polyolefin resin, phenol resin. A synthetic resin such as a resin or a polyvinyl chloride resin can be used, and particularly, an ABS resin can be suitably used.

In the present embodiment, foam molding is performed using the above synthetic resin as a molding material to obtain a foam molded article as the cover body (11). As the foam molding method, well-known thermoforming such as extrusion molding and injection molding can be used.

The expansion ratio of the molded body constituting the cover body (11) is preferably set to 1.2 to 2.0 times, more preferably the lower limit is 1.3 times or more, and the upper limit is 1.1 times. 6
It is better to set it to twice or less. That is, if the expansion ratio is too low, the number of internal voids and air layers is reduced, and the thermal conductivity is increased, as in the case of the non-foamed resin. There is. In addition, when cut with a saw or an electric saw, the cut surface may be chipped like the non-foamed resin, which is not preferable. Conversely, if the expansion ratio is too high, the rigidity decreases, and it becomes difficult to obtain sufficient durability, which is not preferable.

In the present embodiment, the cover body (11)
When the expansion ratio is set in the above specific range, the thermal conductivity becomes about 0.05 to 0.09 kcal / m · hr · ° C. This is almost the same as the thermal conductivity (0.08 to 0.159 kcal / m · hr · ° C.) in the direction orthogonal to the fiber direction of the wood, and as described above, the feeling of cold can be eliminated. . For reference, the thermal conductivity (k) of a non-foamed molded product of ABS resin, melamine resin, and rigid vinyl chloride resin
cal / m · hr · ° C.) is 0.16 to 0.2, respectively.
9, 0.47 to 0.61 and 0.126 to 0.180, which are considerably higher than the foamed molded article and wood of the present embodiment.

In this embodiment, the cover body (11)
If necessary, materials such as wood flour, natural fibers, and synthetic fibers may be mixed into the foamed molded article, and it is particularly preferable to mix wood flour. That is, due to the mixing of the wood flour, the wood flour is intermittently arranged in a streak-like manner on the surface of the cover body (11), so that a good woodgrain can be obtained and a good woody feeling can be obtained. . Furthermore, since wood flour also serves as a bulking agent, the amount of synthetic resin used as a molding material for the nostril cover can be reduced, and the cost can be reduced.

When wood powder is mixed, the particle size is 100
It is preferable to mix 10 to 35% by weight of wood powder of a mesh pass. That is, if the particle size is too large, the dispersibility and kneading properties in the molding material of the wood are deteriorated, and the surface of the molded body becomes rough, which is not preferable. If the amount of wood powder mixed is too large, the foaming moldability, particularly the extrusion moldability, is reduced. For example, there is a possibility that the extrusion speed at the time of foam extrusion molding becomes slow, and problems such as a decrease in productivity may occur. Furthermore, the dispersibility in the molding material of the wood, the kneading property is worse, the surface is rough,
Alternatively, the cohesive strength may be reduced and sufficient strength may not be obtained, which is not preferable. Conversely, if the amount of wood flour is too small, it may be difficult to obtain a good woody feeling, which is not preferable.

In this embodiment, the cover body (11)
The hardness of the foamed rigid synthetic resin body constituting the cover body (11) by a C-type testing machine based on JIS K6301 is 80 to 9
It is set to about 5. This hardness is a wooden board (2)
(Approximately 88 to 97), the feeling of hardness when stepping on as described above is eliminated, and a good stepping comfort can be obtained.

On the other hand, in the present embodiment, the uneven slip prevention portion (2) is provided on the stepping plate (12) of the nostril cover (10).
0), and the tip of the convex portion of the non-slip portion (20) is constituted by an elastic layer (21).

Here, the elastic layer (21) has a large frictional resistance by itself and, when stepped on, the elastic layer (2).
Since 1) is elastically deformed and conforms to the sole, a greater frictional resistance can be obtained, so that slip prevention can be surely achieved. Further, since the elastic layer (21) fits into the sole of the foot, a good feel is obtained on the sole of the foot, and the stepping comfort can be further improved.

In this embodiment, when the non-slip portion (20) is stepped on, the elastic layer (21) is deformed, but the uneven portion under the elastic layer (21) is hard, so that the uneven shape must be maintained. Can be surely prevented from slipping.

In this embodiment, the elastic layer (21)
As the synthetic rubber-based, natural rubber-based, plastic-based rubber, those made of synthetic resin can be used, among which, in particular, high toughness, using a thermoplastic elastomer that is a highly viscous plastic-based rubber Is good. Specifically, it is preferable to use a thermoplastic elastomer such as polyolefin, polyolefin such as polyethylene, polyurethane, polyester, polyamide, polybutadiene, polychlorocarbon, chlorinated polyethylene, or polyvinyl chloride. Can be.

In the above embodiment, the anti-slip portion (2
Although only the tip of the convex portion of (0) is constituted by the elastic layer (21), the present invention is not limited to this. For example, as shown in FIG. 8, the entire convex portion is constituted by the elastic layer (21). As shown in FIG. 9, the periphery of the non-slip portion (20) may be configured as an elastic layer (21). However, it only needs to be constituted by the elastic layer (21). However, even if the elastic layer (21) is elastically deformed, in order to surely maintain the uneven shape on the non-slip portion (20), only the tip of the convex portion is elastic layer (2) as in the above embodiment.
It is preferable to configure according to 1).

Further, the uneven anti-slip portion (20) is formed continuously in the left-right direction of the tread plate (12). However, the present invention is not limited to this, and the concave and convex portions of the anti-slip portion (20) are not limited thereto. The portions may be formed in a lattice shape or a staggered shape, or may be formed discontinuously or intermittently in the left-right direction.

In this embodiment, specifically,
As shown in FIG. 4, the thickness (T) of the elastic layer (21) is
It is set to about 0.5 mm. Further, in the uneven anti-slip portion (20), the depth (D) of the concave portion is set to about 1.0 mm, and the width (W1) of the concave portion and the width (W2) of the convex portion are each set to about 2.5 mm. ing.

In this embodiment, the elastic layer (21)
It is preferable to form the upper surface at the same height as the upper and lower ends of the front and rear ends of the step board (12) or at a position lower by about 0.05 to 0.5 mm. That is, the elastic layer (2
If 1) protrudes from the upper surface of the tread plate (12), it is not preferable because the protruding portion may cause the foot to be caught or tripped over.

In the present embodiment, the elastic layer (21)
In the state where the elastic layer (21) is laminated on the cover body (11) by a C-type testing machine based on JIS K6301, the hardness of the position of the elastic layer (21) in the cover body (11) is determined. Is set to about 60 to 80. However, in the present invention, the hardness of the elastic layer (21) is not particularly limited, and is set to such a degree as to have a non-slip effect or the like according to the shape and size of the elastic layer (21). Just do it. For example, when the elastic layer (21) is elastically deformed by stepping on, the anti-slip portion (20) is not flattened, and it is preferable to set the hardness to such an extent that the uneven shape can be maintained.

The hardness of the material of the elastic layer (21) made of a polystyrene-based thermoplastic elastomer is 30 to 30%.
It is about 40 (a value obtained by measuring a sample having a thickness of about 12 mm with the C-type testing machine).

In the present embodiment, the elastic layer (21)
Is preferably formed in the upper surface of the step board (12) except for the front end region of the nosing portion. That is, the elastic layer (21)
Because of its high frictional resistance, if it is formed up to the front end position reaching the front cover plate (13), a large load is applied to the elastic layer at the front end of the tread plate when climbing the stairs.
Since the release of the load is repeatedly performed, the elastic layer at the front end elastically expands and contracts repeatedly, and the elastic layer at the front end may be cracked and peeled off.

In the above embodiment, the entire cover body (11) is made of a foam made of a hard synthetic resin. However, the present invention is not limited to this.
Only 2) may be formed into a foam of a hard synthetic resin.

Further, the inclined plate (14) is attached to the nostril cover (10).
However, the inclined plate (14) is not necessarily required in the present invention, and the inclined plate may be omitted as shown in FIGS. Furthermore, as shown in these figures, it is not always necessary to form the concave step (3) in the step plate (2).

The first and second engagement pieces (31) and (32)
Need not necessarily be formed, as shown in FIG.
The second engagement piece (32) may be omitted, or as shown in FIG.
Both engagement pieces (31) and (32) may be omitted. When the engaging pieces (31) and (32) are omitted in this manner, as described above, by appropriately using a fixing member such as an adhesive, a double-sided tape, a screw, or the like, the step board ( 2) can be fixed.

[0061]

As described above, according to the stepped nose cover of the stepboard of the first invention, the stepping plate of the cover body is formed of a resin foam molded body, and is substantially the same as the wood forming the stepboard. And the heat transfer coefficient can be adjusted to be as low as that of wood by the internal voids and the air layer. For this reason, even when stepping on the stairs at the time of going up and down the stairs, the sole does not feel a foreign material such as a hard feeling, and can obtain the same texture as wood, and does not feel cold. , Because it feels as warm as wood, it is possible to obtain a good stepping feel. Furthermore, since the stepping plate is made of a hard synthetic resin, there is an effect that partial peeling, cracking, and the like hardly occur at the front edge of the stepping plate even after long-term use, and sufficient durability can be obtained.

In the first invention, the nose portion is sandwiched between the first engagement piece on the lower surface side of the stepping plate and the second engagement piece on the back surface side of the front cover plate, and the cover body is attached to the nose portion. In the case of a configuration, it can be easily attached with one touch without using a fixing member such as an adhesive, a double-sided tape, and a screw, can be easily removed, and the cover can be easily replaced. There is.

Further, in the first invention, when the inclined plate is provided at the lower end on the back side of the front cover plate, the toes are guided by the outer surface of the inclined plate when climbing the stairs.
There is an advantage that the toe can be prevented from being caught on the lower surface of the nosing portion of the stepboard, and the lower surface of the nosing portion can be concealed by the inclined plate, so that a good appearance can be obtained.

The second aspect of the present invention specifies the nose structure of the step board using the nose cover of the first invention, so that the same effect as described above can be obtained. A concave step is provided, and a step board of a nose cover is arranged in the concave step, and the upper surface of the step plate is set to be flush with the upper surface of the step plate. An effect is obtained that the foot can be reliably prevented from tripping on the rear edge.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view showing the vicinity of a nose portion of a wooden indoor staircase to which a nose cover according to an embodiment of the present invention is applied.

FIG. 2 is an exploded sectional view of FIG.

FIG. 3 is a perspective view showing a nasal cover according to the embodiment.

FIG. 4 is an enlarged cross-sectional view showing the vicinity of a non-slip portion in the nostril cover of the embodiment.

FIG. 5 is a cross-sectional view showing the vicinity of a nosing portion of a wooden indoor stair to which a nosing cover according to a first modification of the present invention is applied.

FIG. 6 is a cross-sectional view showing the vicinity of a step portion of a wooden staircase to which a step cover in a second modified example is applied.

FIG. 7 is a cross-sectional view showing the vicinity of a step portion of a wooden staircase to which a step cover in a third modified example is applied.

FIG. 8 is a cross-sectional view showing the vicinity of a non-slip portion of a nasal cover according to a fourth modification.

FIG. 9 is a cross-sectional view showing the periphery of a non-slip portion of a nasal cover according to a fifth modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Step board 2a ... Step nose part 3 ... Concave step part 3a ... Engagement recessed part 10 ... Step nose cover 11 ... Cover main body 12 ... Stepping plate 13 ... Front cover plate 14 ... Inclined plate 20 ... Non-slip part 21 ... Elastic layer 31 ... First engagement piece 32... Second engagement piece

Claims (10)

[Claims] 1. A nose cover of a step board for covering an area from an upper surface of a step portion to a front end face of a wooden step board, wherein the step plate is disposed horizontally along the upper surface of the step portion, and A front cover plate extending downward from the front end of the plate, and vertically disposed along the front end surface of the nose portion. A non-slip portion is provided along the left-right direction, and the stepping plate of the cover main body is formed of a low-foam molded body of a hard synthetic resin, and at least a tip of the convex portion of the non-slip portion is formed of an elastic layer. A nose cover of a step board, characterized by being made of: 2. The step board is made of a synthetic resin selected from acrylonitrile-butadiene-styrene (ABS) resin, polystyrene resin, polyolefin resin, phenol resin, and polyvinyl chloride resin. The nosing cover of the step board according to claim 1. 3. The elastic layer is selected from polystyrene, polyolefin, polyurethane, polyester, polyamide, polybutadiene, polychlorocarbon, chlorinated polyethylene, and polyvinyl chloride thermoplastic elastomers. The nose cover of a step board according to claim 1 or 2, wherein the nose cover is constituted by the above. 4. The step board is made of a foam molded article having a foaming ratio of 1.2 to 2.0 times.
4. The nose cover of the step board according to any one of claims 1 to 3. 5. A first engagement piece protruding from a rear portion of a lower surface of the stepping plate, and a second engagement member is provided at a lower end of a rear surface of the front cover plate.
An engagement piece is protruded, and the first engagement piece is engaged with an engagement recess formed at a rear portion of an upper surface of the nosing portion, and the second engaging piece is engaged with a front end of a lower surface of the nosing portion. The said main body is comprised so that the said cover main body may be attached to a nose part by pinching the said 1st and 2nd engagement piece to a nose part based on the elastic force of the said cover main body in the combined state. 5. The nosing cover of the step board according to any one of 4. 6. The foam molded article as the step board has a thickness of 10
The nosing cover of a stepboard according to any one of claims 1 to 5, wherein the stepping plate contains 10 to 35% by weight of wood powder having a particle size of 0 mesh pass. 7. The hardness of the foam molding as the step board (measured by a C-type testing machine in accordance with JIS K6301) is set to 80 to 95.
The nosing cover of the step board according to any one of the above. 8. The method according to claim 1, wherein a hardness (measured by a C-type testing machine in accordance with JIS K6301) of the position of the elastic layer in the step board is set to 60 to 80. Nose cover of the corrugated board. 9. A lower end of the front cover plate is provided with an inclined plate which is inclined downward from the lower end toward the rear surface direction, and the inclined plate is arranged below the nose. 9. The nose cover of the step board according to any one of items 8 to 8. 10. A nosing structure of a step board, wherein a region from an upper surface to a front end face of the nosing portion of the wooden step board is covered with the nosing cover according to any one of claims 1 to 9. A concave step is formed in the mounting area of the step board on the upper surface of the portion, and the step plate is arranged in the concave step, and the upper surface of the step plate is in the same plane as the upper surface of the step plate. Nose structure of a step board characterized by being arranged in.