JP6722891B2 - Tread - Google Patents

Description

The present invention relates to a tread plate that constitutes a tread surface of stairs.

Conventionally, a tread plate that is arranged as a step plate of stairs and constitutes a tread surface is known. As such a tread, it is known that a cushioning material is provided at the corners in order to reduce the impact at the time of contact with the corners on the upper surface side that is the near side when climbing. If such a cushioning material is provided so as to be exposed in the recess provided in the tread body, there is a problem that the cushioning material tends to stand out.
For example, Patent Document 1 below discloses a tread plate in which a buffer block is embedded in the nose of the tread plate body, and the tread surface and riser surface of the tread plate body including the buffer block are covered with a resin-impregnated decorative plate.

Japanese Utility Model Publication No. 1-86628

However, in the tread plate described in Patent Document 1, when the load is applied to the nosing, the buffer block is largely deformed as compared with the tread body, so that the tread plate is formed at the boundary between the tread body and the buffer block. It is conceivable that the resin impregnated decorative plate is easily damaged by the step.

The present invention has been made in view of the above circumstances, and while the buffer member is provided at the corner on the one side in the thickness direction to be the tread surface, the buffer member can be made inconspicuous, and the surface decorative sheet It is an object of the present invention to provide a tread that can suppress damage to the floor.

In order to achieve the above-mentioned object, the tread according to the present invention is configured such that a corner of the tread main body in the thickness direction and one end in the depth direction is opened toward one side in the thickness direction and one side in the depth direction. A tread having a cushioning member provided in a provided recess, the cushioning member extending in a series from the main body portion arranged to form the corner of the tread to the other side in the thickness direction of the tread. Out, the soft resin portion having a cover piece portion arranged so as to cover the one end surface in the depth direction of the tread main body, the side surface portion of the recess facing the one side in the depth direction of the tread, and the main body portion A hard resin portion harder than the soft resin portion and fixedly provided on the main body portion so as to be positioned between the other side of the tread depth direction, and the hard resin portion, the main body portion, and A surface decorative sheet is attached so as to cover the surface of the cover piece in a continuous manner, and to cover one surface in the thickness direction of the tread body, and the hard resin part has a tread thickness of the recess. A bottom piece arranged so as to be located between the bottom surface portion facing one side in the direction and the main body, and a series of pieces extending from one end of the bottom piece in the depth direction of the tread to the other side in the thickness direction of the tread. A fixing piece portion fixed to the tread body by a stopper is provided, and a front end receiving recess for receiving the fixing piece portion is provided at a front end portion of the tread body so as to be continuous with the recess. The fixing piece portion is provided such that the front surface thereof is substantially flush with the front end surface of the tread body .

The tread according to the present invention has the above-described configuration, so that the cushioning member can be made inconspicuous even though the cushioning member is provided at the corner portion on the one surface side in the thickness direction to be the tread, Further, it is possible to suppress damage to the surface decorative sheet.

(A), (b) shows typically an example of the tread which concerns on one Embodiment of this invention, (a) is a partial fracture schematic longitudinal cross-sectional view, (b) is a partial fracture schematic disassembly vertical section. It is a side view. (A), (b) is a partial fracture schematic disassembled vertical cross-sectional view which abbreviate|omitted one part of the tread. (A), (b) shows typically an example of the tread according to another embodiment of the present invention, (a) is a partially broken schematic vertical sectional view, and (b) is partially omitted. It is a partial fracture schematic disassembled longitudinal cross-sectional view.

Embodiments of the present invention will be described below with reference to the drawings.
Note that in some of the drawings, some of the detailed reference numerals attached to other drawings are omitted.
Further, in each of the following embodiments, the front side is the front, the opposite side is the rear, with the front side being the rear, and the front-rear direction being the depth direction of the tread, with reference to the state of facing the installed tread from the downstairs side, and The directions such as the vertical direction will be described with reference to this state.

1 and 2 are diagrams schematically showing an example of a tread according to the first embodiment.
The tread 1 according to the present embodiment has one side in the thickness direction (upper side) and one in the depth direction at the corners of one surface (top surface) 11 in the thickness direction and one end surface (front end surface) 13 in the depth direction of the tread body 10. The buffer member 20 is provided in the recess 14 provided so as to open toward the side (front side). The cushioning member 20 extends in a series from the main body portion 22 arranged so as to form the corner portion of the tread plate 1 to the other side (lower side) in the thickness direction of the tread plate, and the front end surface 13 of the tread plate body 10 as a whole. The soft resin portion 21 having the cover piece portion 24 arranged so as to cover the whole is provided. The cushioning member 20 is located between the side surface portion 16 of the recess 14 facing one side (front side) in the tread depth direction and the other side (rear side) of the main body 22 in the tread depth direction and the main body portion. A hard resin portion (side piece portion) 26, which is fixedly provided on the hard disk 22, is harder than the soft resin portion 21. Moreover, the tread 1 covers the surfaces 22a, 22b, 24a, 26a of the hard resin portion (side piece) 26, the main body portion 22 and the cover piece portion 24 in a continuous manner, and also covers the upper surface 11 of the tread body 10. The surface decorative sheet 30 is attached.

In the present embodiment, in the side piece portion 26 that constitutes the hard resin portion located between the side surface portion 16 of the recess 14 and the rear side of the main body portion 22, the bottom surface portion 15 that faces the upper side of the recess 14 and the main body. The bottom piece portion 28 is provided so as to be positioned between the bottom portion 28 and the portion 22. The bottom piece 28 is provided so as to extend in a series from the other end (lower end) of the side piece 26 in the thickness direction of the tread to the front side. Further, a fixing piece portion 29 fixed to the tread body 10 by the stopper 2 is provided so as to extend in a continuous manner downward from one end (front end) of the bottom piece 28 in the depth direction of the tread. There is. That is, in the present embodiment, the side piece portion 26, the bottom piece portion 28, and the fixed piece portion 29 configure the hard resin portion 25 that is harder than the soft resin portion 21. Further, the cover piece portion 24 of the soft resin portion 21 can be brought into contact with and separated from the one side surface (front surface) of the fixing piece portion 29 in the depth direction of the tread so that the stopper fastening portion 29a of the fixing piece portion 29 can be exposed. The fixed piece portion 29 is arranged so as to cover the front side thereof.

In addition, in the present embodiment, the mounting groove 17 is provided so as to open toward the upper side on the rear side of the soft resin portion 21, and the marking member 32 is mounted in the mounting groove 17. In addition, in the present embodiment, the second mounting groove 19 is provided on the rear side of the first mounting groove 17 as the mounting groove, and the second mounting groove 19 is provided so as to open upward with a space therebetween. Also has a structure in which the marking member 32 is attached. In addition, these marking members 32, 32 are attached to the first mounting groove 17 and the second mounting groove 17 so as to press the ends 31, 31 of the surface decorative sheet 30 at both edges of the openings of the first mounting groove 17 and the second mounting groove 19. It is configured to be attached to the portion 19.

This tread 1 is arranged as a step plate of the stairs such that the thickness direction is along the vertical direction so that the upper surface 11 side of the tread body 10 constitutes the tread of the stairs. The shape of the tread 1 in plan view may be an appropriate shape depending on the stair structure in which the tread 1 is provided. For example, when the stairs are arranged on the straight stairs (straight stairs), all of the plurality of treads 1 constituting the stairs may be formed into a substantially rectangular flat plate shape that is long in the stairs width direction. In this case, the tread 1 arranged in the surrounding portion may have a substantially triangular shape or the like in a plan view. Further, the tread 1 may be arranged such that both side ends of the step width direction are fixed to side girders or the like. Further, the tread 1 may be constructed as a so-called open stair (strip stair) without a riser, or a riser joined to the lower side of the front end so as to form a nose at the front end. Good. In this case, a recessed groove or the like for receiving the upper end portion of the riser plate may be provided on the lower surface side of the front end portion of the tread plate 1.

Further, the dimension along the staircase width direction of the tread 1 may be appropriately set according to the above-described various staircase structures and the staircase width dimension of the installation location. The dimension along the staircase width direction of the tread 1 may be such that the staircase width dimension (inner dimension) in the installed state is 600 mm or more, and preferably the staircase width dimension (inner dimension) is The size may be 750 mm or more. Further, the depth dimension of the tread 1 may be appropriately set from the viewpoint of installation location, walking stability when climbing stairs, and the like. The depth dimension of the tread 1 may be, for example, 150 mm or more, and preferably 210 mm or more. Further, the thickness dimension of the tread 1 may be appropriately set depending on the support structure of the tread 1, and the like from the viewpoint of strength of the tread 1. The thickness of the tread 1 may be 20 mm or more, and preferably 35 mm or more.

The tread body 10 has a substantially flat plate shape. Further, the shape of the step board main body 10 as viewed in the direction along the width direction of the staircase is a substantially uniform shape over the whole. Further, the shape of the step plate main body 10 in a plan view has a substantially rectangular shape which is long in the direction along the step width direction in a plan view, depending on the stair structure in which the step plate 1 is arranged as described above, Various shapes such as a substantially square shape, a substantially trapezoidal shape, a substantially triangular shape, a substantially diamond shape, and a substantially fan shape may be used.
The upper surface 11 of the tread body 10 and the lower surface 12 as the other surface in the thickness direction are substantially parallel to each other, and the front end surface 13 of the tread body 10 is substantially orthogonal to the upper surface 11 and the lower surface 12. There is. In the illustrated example, an R chamfered chamfered portion is provided at a corner between the lower surface 12 and the front end surface 13.

As shown in FIGS. 1 and 2, the recess 14 is provided so as to cut out a corner between the upper surface 11 and the front end surface 13 of the tread body 10 and over the entire width of the staircase. There is. The recess 14 is defined by a bottom surface portion 15 facing upward and a side surface portion 16 facing forward. The bottom surface portion 15 and the side surface portion 16 are formed so as to be substantially orthogonal to each other, the bottom surface portion 15 is substantially parallel to the upper surface 11 of the tread body 10, and the side surface portion 16 is a front end of the tread body 10. It is substantially parallel to the surface 13. In addition, in the illustrated example, the bottom surface portion 15 has a step-like stepped shape so that the rear side portion is located above the front side portion.
Further, in the present embodiment, the front end receiving recess 18 for receiving the fixed piece 29 of the hard resin portion 25 is provided at the front end of the tread body 10 so as to be continuous with the recess 14.
As shown in FIG. 2A, the front end receiving recess 18 is provided so as to be continuous with the front end side portion of the bottom surface portion 15 of the recess 14, and is notched so as to open toward the upper side and the front side. It is provided in. The front end receiving recess 18 is defined by a bottom surface portion 18a that is substantially parallel to the bottom surface portion 15 of the recess 14, and a side surface portion 16 of the recess 14 and a side surface portion 18b that is substantially parallel to each other. Is provided over the entire area.

In addition, in the present embodiment, the side surface portion 16 of the recess 14 is provided with the side surface receiving recess 16a for receiving the tip end portion of the stopper fastening piece portion 27 of the cushioning member 20 described later. The side surface receiving recess 16a is provided in a cutout shape so as to open toward the front side and extend in the direction along the step width direction of the tread plate body 10 as a whole. The illustrated example shows an example in which the side surface receiving recess 16 a is provided so as to open at the lower end portion of the side surface portion 16. Also, an example is shown in which the side receiving recess 16a has a substantially rectangular groove shape that is a substantially rectangular shape when viewed in the direction along the step width direction. Further, an example is shown in which the groove inner side surface facing the upper side, which is one side in the groove width direction of the side surface receiving recess 16a, is provided in a series at the rear side portion of the bottom surface portion 15. Further, an example is shown in which a C-chamfered chamfered portion is provided at a corner portion between the side surface portion 16 and the inner side surface facing the lower side which is the other side in the groove width direction of the side surface receiving recess 16a.

The first mounting groove 17 and the second mounting groove 19 are provided over the whole so as to extend in the direction along the step width direction. Further, the first mounting groove 17 is configured by a gap between the side surface portion 16 of the recess 14 and the side piece portion 26 of the cushioning member 20, and the side surface portion 16 of the recess 14 and the side piece portion 26 of the cushioning member 20 are formed. It is provided so as to open toward the upper side. That is, the side surface portion 16 of the recess 14 constitutes a groove inner side surface of the first mounting groove 17 on one side in the groove width direction, and the hard resin portion 25 forms a groove inner side surface of the first mounting groove 17 on the other side in the groove width direction. Constitute. Further, the stopper fastening piece portion 27 of the cushioning member 20 described later constitutes the groove bottom of the first mounting groove 17. In addition, as shown in FIG. 2A, a corner portion between the upper surface 11 and the side surface portion 16 of the tread body 10 that constitutes a rear side edge portion of both opening edge portions of the first mounting groove 17 will be described later. The structure is provided with a concave stepped portion 11a that receives the collar-shaped portion 33 of the head of the marking member 32. The recessed step portion 11a is notched over the whole so as to open toward the center side and the upper side in the groove width direction of the first mounting groove 17 and to extend in the direction along the step width direction of the tread plate body 10. It is provided in. The illustrated example shows an example in which the recessed step portion 11a is divided into a bottom surface that faces upward and an inclined side surface that slopes downward from the top surface 11 toward the bottom surface.

The second mounting groove 19 is provided so as to be parallel to the first mounting groove 17. Recessed step portions 11a and 11a similar to the above are provided on both edge portions of the opening of the second mounting groove 19, respectively. The groove depth dimension of the mounting grooves 17 and 19 along the tread thickness direction and the groove width dimension along the tread depth direction are such that the engagement protrusions 34 and 34 of the marking members 32 and 32 described later can be fitted. It has an appropriate size.
The tread body 10 may be made of a wood-based material, a synthetic resin-based material, a metal-based material, or the like. Examples of the wood-based material include wood laminated boards such as plywood and LVL (single board laminated material), wood boards such as particle boards, insulation boards, MDF (medium density fiber boards), hard board and other wood fiber boards. Etc. Further, the wood-based material may be wood powder/plastic composite material (WPC) containing wood powder, a synthetic resin material, an inorganic filler, a compatibilizer, a coloring agent and the like in a predetermined content ratio. Further, the tread main body 10 may have a multi-layer structure in which plate materials made of these various materials are laminated, for example, a structure in which MDF and the like are laminated on both front and back surfaces of a base material such as plywood. It may be one. Further, the recesses 14 including the side surface receiving recesses 16a, the front end receiving recesses 18, and the second mounting grooves 19 may be formed at the time of molding, or may be formed by cutting or the like.

As shown in FIGS. 1 and 2, the cushioning member 20 is attached to the tread body 10 so as to close the recess 14 of the tread body 10. The cushioning member 20 is provided over the entire width of the step main body 10 in the width direction of the stairs, and is elongated in the width direction of the stairs. The shape of the cushioning member 20 as viewed in the longitudinal direction is a substantially uniform shape over the entire length.
Further, in the present embodiment, the cushioning member 20 has a configuration in which the soft resin portion 21 and the hard resin portion 25 are integrally molded.
The cushioning member 20 is made of a synthetic resin material, and an extruded product or an injection product in which the soft resin portion 21 and the hard resin portion 25 are integrally formed by different material molding (different material simultaneous composite molding) or the like. It may be a resin molded product such as a molded product. Further, the soft resin portion 21 and the hard resin portion 25 may be formed of the same material (same resin composition).

The hardnesses of the soft resin portion 21 and the hard resin portion 25 are different from each other in terms of ensuring the cushioning function, load at the boundary portion between the soft resin portion 21 and the hard resin portion 25, and at the boundary portion between the hard resin portion 25 and the tread body 10. It may be appropriately set from the viewpoint of reducing the step difference that occurs when the light is applied. For example, the soft resin portion 21 is formed of a soft resin composition having a Shore A hardness of about 40 to 80, and the hard resin portion 25 is formed of a hard resin composition having a Shore A hardness of about 60 to 100. It may be good. Preferably, the soft resin portion 21 is formed of a soft resin composition having a Shore A hardness of 50 or more and less than 70, and the hard resin portion 25 is a hard resin composition having a Shore A hardness of 70 or more and less than 90. It may be formed from. Further, the difference in Shore A hardness between the soft resin composition and the hard resin composition may be 10 or more.

If the Shore A hardness of the soft resin composition that constitutes the soft resin portion 21 is too low, it tends to deform, resulting in a bottom protruding shape, and it tends to be difficult to absorb the impact, while if it is too high, deformation will occur. Tends to be difficult to do. Further, if the Shore A hardness of the hard resin composition forming the hard resin portion 25 is too low, the hardness difference with the tread body 10 tends to be large, whereas if it is too high, the hardness with the soft resin portion 21 is high. The difference tends to increase, and the step formed at the boundary between the hard resin portion 25 (side piece portion 26) and the portion adjacent thereto tends to increase. Further, if the difference in Shore A hardness between the soft resin composition forming the soft resin portion 21 and the hard resin composition forming the hard resin portion 25 is too small, the cushioning function of the soft resin portion 21 tends to become small. .. With the above-described configuration, the soft resin portion 21 ensures an appropriate cushioning function, but the difference in hardness between adjacent portions does not become too large, and it is less likely to cause a feeling of strangeness when stepped on. can do. Moreover, the damage of the surface decorative sheet 30 can be suppressed more effectively.

The Shore A hardness of the soft resin composition forming the soft resin portion 21 and the hard resin composition forming the hard resin portion 25 described above is a hardness measured using a type A durometer according to JIS K7215. The Shore A hardness may be measured for each test piece by preparing a test piece made of a resin composition that constitutes the soft resin portion 21 and the hard resin portion 25, respectively. Alternatively, the soft resin portion 21 and the hard resin portion 25 may be integrally formed by using the soft resin composition and the hard resin composition having the Shore A hardness as described above.

Further, the soft resin portion 21 and the hard resin portion 25 may be configured such that the resin main components are the same and the content of the plasticizer in the resin main component of the soft resin portion 21 is larger than that of the hard resin portion 25. Good. As the resin main component of the resin composition forming each of the soft resin portion 21 and the hard resin portion 25, as long as it is possible to change the hardness by changing the content ratio of the plasticizer, it is sufficient. , For example, polyvinyl chloride resin. The polyvinyl chloride resin may have a polymerization degree of about 1000 to 3000. Further, as the plasticizer added to the resin main component, various plasticizers such as phthalate ester-based or polyester-based may be adopted. Examples of the phthalate ester type include DIDP (diisodecyl phthalate), DINP (diisononyl phthalate), DOP (dioctyl phthalate), DBP (dibutyl phthalate) and the like. As such a plasticizer, DIDP or a polyester plasticizer may be preferably used from the viewpoint of low migration property and the like.
In addition, the content of the plasticizer with respect to the resin main component of the resin composition that constitutes the soft resin portion 21 and the hard resin portion 25 is determined from the viewpoint of ensuring the buffer function and the hardness difference between the adjacent portions as described above. May be appropriately set from the viewpoint of reducing For example, the soft resin composition forming the soft resin portion 21 may be the one in which the plasticizer of 80 to 140 parts (parts by mass) is added to 100 parts (parts by mass) of the resin main component. Further, the hard resin composition constituting the hard resin portion 25 may be one in which 60 to 100 parts (parts by mass) of the plasticizer is added to 100 parts (parts by mass) of the resin main component.

The side piece portion 26 of the hard resin portion 25 is provided so as to be located between the rear side of the body portion 22 of the soft resin portion 21 and the side surface portion 16 of the recess 14 of the tread body 10.
The side piece portion 26 has an upper surface 26a forming a surface facing upward, which is substantially flush with the upper surface 11 of the tread main body 10, and an upper surface forming a surface facing upward of the main body portion 22 of the soft resin portion 21. It is provided so as to be continuous with 22a.
In the present embodiment, an inclined surface portion 26c that is inclined downward as it goes to the front side is provided at the front side corner portion of the upper end portion that is one end portion in the thickness direction of the step plate of the side piece portion 26. Further, the flange-shaped portion 33 of the head portion of the marking member 32 is received at the rear side corner portion of the upper end portion of the side piece portion 26, which constitutes the front side edge portion of both opening edge portions of the first mounting groove 17. The configuration is such that a concave step portion 26b is provided. The recessed stepped portion 26b is substantially the same as the recessed stepped portion 11a of the tread body 10 described above so as to open toward the center side and the upper side in the groove width direction of the first mounting groove 17, and the stairs of the side piece 26. It is provided over the entire length so as to extend in the direction along the width direction (longitudinal direction).

Further, in the present embodiment, the fastener fastening piece portion 27, which is arranged on the side piece portion 26 so as to form the groove bottom of the first attachment groove 17, and to which fasteners such as nails, staples and screws are fastened. Is provided. The stopper fastening piece 27 is provided over the entire length of the side piece 26 so as to project rearward from the lower end portion of the side piece 26. In addition, the stopper fastening piece portion 27 is configured such that the rear end portion which is the front end portion in the protruding direction is inserted into the side surface receiving recess 16a provided in the side surface portion 16 of the tread body 10 described above.
In addition, in the present embodiment, the lower surface of the cushioning member 20 (bottom piece 28) is brought into contact with the bottom surface 15 of the recess 14, and the stopper is not attached to the fastener attachment piece 27. A gap is formed between the lower surface of the tool fastening piece portion 27 and the bottom surface portion 15 with which the lower surface abuts. In other words, the stopper fastening piece 27 is deformed (elastically deformed), and is abutted against the bottom surface portion 15 so as to be pressed by the stopper and fixed.

The dimension along the front-rear direction and the dimension along the up-and-down direction, which are the projecting dimensions of the fastener fastening piece portion 27, may be appropriately set from the viewpoints of fastening performance of the fastener and downsizing.
Further, in the illustrated example, a chamfered portion having an R chamfered shape is provided at a corner portion on the lower surface side of the tip end portion in the projecting direction of the stopper fastening piece portion 27. Further, in the illustrated example, in order to make the projecting direction base end portion of the stopper fastening piece portion 27 thin and facilitate the deformation, the bottom surface side corner of the projecting direction base end portion of the fastener fastening piece part 27 is provided. An example is shown in which a recess is provided over the entire length so as to extend in the longitudinal direction.
Further, the dimension along the front-rear direction of the side piece portion 26 (the dimension along the front-rear direction from the surface facing the rear side that constitutes the groove inner side surface on the other side in the groove width direction of the first mounting groove 17 to the front surface) May be appropriately set from the viewpoint of reducing the step difference at the boundary portion generated when a load is applied, the viewpoint of downsizing, and the like. The dimension of the side piece portion 26 along the front-rear direction may be about 1 mm to 10 mm, preferably about 2 mm to 5 mm.

The bottom piece portion 28 is provided so as to be located between the lower side of the main body portion 22 of the soft resin portion 21 and the bottom surface portion 15 of the recess 14 of the tread body 10. The bottom surface of the bottom piece 28 is a flat surface and is in contact with the bottom surface 15 of the recess 14. The dimension of the bottom piece 28 along the vertical direction may be appropriately set from the viewpoints of strength, compactness, and the like. In this embodiment, the dimension of the bottom piece 28 along the vertical direction is smaller than the dimension of the side piece 26 along the front-rear direction. The dimension of the bottom piece 28 along the vertical direction may be, for example, about 0.5 mm to 10 mm, preferably about 1 mm to 3 mm.

The fixed piece portion 29 is provided so as to extend downward from the front end portion of the bottom piece portion 28. The fixed piece portion 29 is provided such that the front surface forming the surface facing the front side is substantially flush with the front end surface 13 of the tread body 10. That is, the dimension of the fixed piece portion 29 along the front-rear direction is substantially the same as the dimension of the front end receiving recess 18 of the tread body 10 along the front-rear direction. Further, the dimension of the fixing piece portion 29 along the front-rear direction may be an appropriate dimension from the viewpoint of strength and the like, and in the illustrated example, it is slightly larger than the dimension of the side piece portion 26 along the front-rear direction. Is shown.
Further, the fixed piece portion 29 has a flat rear surface abutting on the side surface portion 18 b of the front end receiving recess 18. The illustrated example shows an example in which a gap is formed between the lower surface of the fixed piece portion 29 and the bottom surface portion 18a of the front end receiving recess 18 with the cushioning member 20 fixed to the step plate body 10. However, the lower surface of the fixed piece portion 29 may be in contact with the bottom surface portion 18 a of the front end receiving recess 18.

Further, on the front surface side of the fixing piece portion 29, a head accommodation recess 29a forming a fastener fixing portion to which a fastener 2 such as a nail or a screw for fixing the fixing piece portion 29 to the tread body 10 is fixed. Is provided.
The head accommodation recess 29a is provided so as to open toward the front side so that the head of the stopper 2 can be accommodated. Further, the head-accommodating recessed portion 29a may be provided at a plurality of positions at intervals in the direction along the staircase width direction, or may be provided in a concave groove shape so as to extend in the direction along the staircase width direction. Good.

The soft resin portion 21 is arranged so as to form a front end corner portion on the upper surface side of the tread plate 1, and is configured to cover substantially the entire front end face 13 of the tread plate body 10.
In the main body portion 22 of the soft resin portion 21, the upper surface 22a forming the surface facing upward is substantially flush with the upper surface 11 of the tread body 10, and the front surface 22b forming the surface facing the front side is a covering piece portion. The front surface 24 a of 24 is provided in a series (flush). Further, in the present embodiment, at the rear end corner portion of the main body portion 22 on the upper surface 22a side, the protruding piece portion 23 protruding rearward so as to cover the inclined surface portion 26c of the side piece portion 26 of the hard resin portion 25. Is provided. Further, a chamfered portion having an R chamfered shape similar to the front end corner portion on the lower surface 12 side of the tread body 10 is provided at a corner portion between the upper surface 22a and the front surface 22b of the main body portion 22.
Further, the main body portion 22 has a substantially rectangular shape when viewed in the direction along the width direction of the stairs. In the illustrated example, the surface of the main body portion 22 facing the rear side and the surface of the side piece portion 26 facing the front side are shown in a plan view, and the surface of the main body portion 22 facing the lower side and the surface facing the upper side of the bottom piece portion 28. Although and are shown in a plane, there may be a mixed state at these boundaries.

Further, in the present embodiment, the main body portion 22 has a substantially rectangular shape in which the dimension along the up-down direction is larger than the dimension along the front-rear direction when viewed in the direction along the step width direction. The dimension along the front-rear direction and the dimension along the up-down direction of the main body portion 22 are from the viewpoint of ensuring a cushioning function, the stability of walking when stepped on, the strength of the tread body 10, and the tread body 10. It may be appropriately set according to the thickness of the. The dimension of the main body 22 along the front-rear direction and the dimension along the vertical direction may be, for example, about 4 mm to 20 mm, preferably about 7 mm to 15 mm. Further, the dimension along the front-rear direction and the dimension along the up-down direction of the main body portion 22 may be ½ or less of the thickness dimension of the tread body 10, and preferably ⅓ of the thickness dimension of the tread body 10. It may be as follows. The illustrated example shows an example in which the dimension along the front-rear direction and the dimension along the up-down direction of the body portion 22 are set to about 2/7 of the thickness dimension of the tread body 10.

Further, in the present embodiment, the main body 22 is provided with the hollow portion 22c. The hollow portion 22c may be provided so as to penetrate the entire length of the main body portion 22. The number and position of the hollow portions 22c, the shape and the area of the hollow portions 22c in the longitudinal direction, are appropriately set from the viewpoints of securing a cushioning function, walking stability when stepped on, and the like. May be The illustrated example shows an example in which the single hollow portion 22c is provided so as to be located at a lower portion in the up-down direction of the main body portion 22. Further, in the illustrated example, an example in which a single hollow portion 22c having a circular shape when viewed in the longitudinal direction is provided so as to be positioned at substantially equal intervals from each of the side piece portion 26 and the bottom piece portion 28 Showing. Also, an example is shown in which the hollow portion 22c has a circular shape having a diameter of about 1/3 of the dimension along the front-rear direction of the main body portion 22 when viewed in the longitudinal direction. The hollow portion 22c provided in the main body portion 22 is not limited to this mode, and various other modifications are possible.

The cover piece portion 24 is provided so as to extend downward from the lower end of the front end side portion of the main body portion 22. The covering piece portion 24 has a front surface 24a forming a surface facing the front side and a rear surface facing the rear side having a substantially flat surface shape, and a substantially flat plate shape having a thickness direction along the front-rear direction. Further, as shown in FIG. 1, the cover piece portion 24 is configured such that its rear surface is in contact with the front surface of the fixed piece portion 29 and the front end surface 13 of the tread body 10. The thickness dimension of the cover piece portion 24 may be an appropriate thickness dimension from the viewpoint of cushioning property and strength, and may be, for example, about 0.5 mm to 10 mm or about 1 mm to 3 mm. In the illustrated example, the thickness dimension of the cover piece portion 24 is set to be about ⅕ of the dimension along the front-rear direction of the main body portion 22.

Further, in the present embodiment, the cover piece portion 24 is configured to cover the corner portion between the lower surface 12 and the front end surface 13 of the tread body 10. That is, the cover piece portion 24 is provided so that the tip end portion (lower end portion) in the extending direction reaches the chamfered portion of the corner between the lower surface 12 and the front end surface 13 of the tread body 10. As shown in FIG. 1, the front end portion of the cover piece portion 24 of the tread plate body 10 is in a state where the decorative sheet 30 is attached from the front surface 24 a of the cover piece portion 24 to the lower surface 12 of the tread plate body 10. It is curved so as to follow the chamfered portion of the corner on the lower surface side. The tip of the cover piece 24 is tapered toward the tip side in the extending direction. The tip of the cover piece 24 may be formed in a shape corresponding to the chamfered portion of the corner on the lower surface side of the tread main body 10, and is curved due to the deformation caused by the attachment of the decorative sheet 30. It may be a thing. Further, in the illustrated example, an example is shown in which a step is formed at the boundary between the distal end of the cover piece 24 in the extending direction and the lower surface 12 of the tread body 10 while being covered with the decorative sheet 30. However, the chamfered shape may be changed so as to be continuous. Further, for example, a mode in which a notch-shaped lower surface side recess is provided in a corner on the lower surface side of the tread body 10 and a convex portion arranged in this lower surface side recess is provided at the tip end portion of the covering piece portion 24, etc. May be

Further, the cover piece portion 24 can be separated from the front surface of the fixed piece portion 29 so that at least the fastener 2 can be fixed to the head accommodation recess 29a of the fixed piece portion 29 of the hard resin portion 25. The tip side portion can be deformed so as to be rolled up diagonally to the front side. The cover piece portion 24 may be separated from the fixed piece portion 29 over the entire surface, and a part of the upper end side portion is fixedly (integrally) provided with respect to the fixed piece portion 29. It may be a thing. The covering piece portion 24 may be fixed to the front surface of the fixing piece portion 29 by an appropriate stopper, an adhesive, or the like, or may be fixed to the front surface side of the fixing piece portion 29 by adhering the decorative sheet 30. It may be done.
As shown in FIGS. 2A and 2B, the cushioning member 20 having the above-described structure is configured by the stoppers fixed to the stopper fixing piece portions 27 and the fixing pieces 2 fixed to the fixing piece portions 29. It may be attached to the tread body 10. Further, the cushioning member 20 may be attached to the tread main body 10 by using an adhesive together.

The surface decorative sheet 30 has a thin sheet shape (film shape), and may be, for example, a synthetic resin sheet or a veneer made of natural wood (name wood). As shown in FIG. 1, the surface decorative sheet 30 is attached to the upper surface 26a of the side piece portion 26, the upper surface 22a and the front surface 22b of the main body portion 22 and the front surface 24a of the cover piece portion 24 in a series. Further, the surface decorative sheet 30 is attached so as to cover the upper surface 11 of the tread main body 10.
The surface decorative sheet 30 on the upper surface 11 side of the tread main body 10 may be attached so as to exclude the above-mentioned portions where the mounting grooves 17 and 19 are provided. Alternatively, after the surface decorative sheet 30 is attached to the upper surface 11 of the tread body 10 and the upper surfaces 26a and 22a of the cushioning member 20 in a series, the portions arranged so as to cover the mounting grooves 17 and 19 are cut off or the like. It may be attached to the upper surface 11 side of the tread body 10. In this way, the surface decorative sheet 30 attached to the upper surface 11 side of the tread main body 10 has the portions attached to the concave stepped portions 26b, 11a, 11a, 11a at both edges of the openings of the mounting grooves 17, 19 respectively. The end portions 31, 31, 31, 31 on both sides of the openings of the mounting grooves 17, 19 are formed. Further, the surface decorative sheet 30 is attached in a series from the front surface 24a of the covering piece portion 24 of the cushioning member 20 to the lower surface 12 of the tread body 10. Note that the surface decorative sheet 30 may be attached to the rear end surface as the other end surface in the depth direction of the tread body 10 as well. Further, the surface decorative sheet 30 or an appropriate edge sheet may be attached to both or one of both end surfaces of the step board body 10 in the width direction of the stairs.

As shown in FIG. 1, the marking members 32, 32 are attached to the respective mounting grooves 17, 19 so as to press the edges 31, 31, 31, 31 of the surface decorative sheet 30 attached as described above. It is configured. These marking members 32, 32 have the same size and shape, that is, the same parts. Further, these marking members 32, 32 are provided over the entire step width direction of the tread 1.
These marking members 32, 32 are configured to include a head exposed on the upper surface side of the tread 1, and engaging protrusions 34, 34 fitted in the mounting grooves 17, 19. The end portions 31, 31, 31, 31 of the surface decorative sheet 30 are pressed by the collar-shaped portions 33, 33, 33, 33 provided at both ends of the head in the front-rear direction. In addition, an example is shown in which the retaining projections 34a, 34a are provided on both sides of the engaging projections 34, 34 in the front-rear direction so as to come into contact with the inner surfaces of both mounting grooves 17, 19 with deformation. Note that each of the marking members 32, 32 may be formed of a hard synthetic resin material, and for example, at least the upper surface side portion of the heads 33, 33 of each of the marking members 32, 32 has a luminous property. You may have.

The tread plate 1 according to the present embodiment has the above-described configuration, so that the cushioning member 20 is made inconspicuous even though the cushioning member 20 is provided at the corner portion on the one surface side in the thickness direction, which is the tread surface. In addition, it is possible to suppress damage to the surface decorative sheet 30.
That is, at the corners between the thickness direction one surface (upper surface) 11 and the depth direction one end surface (front end surface) 13 of the tread body 10, the thickness direction one side (upper side) and the depth direction one side (front side) are directed. The buffer member 20 is provided in the recess 14 provided so as to open. Therefore, cushioning properties can be imparted to the front corner portion of the upper surface that is the tread surface of the tread 1, and the impact when contacting this corner portion can be mitigated. Further, the cushioning member 20 is continuously extended from the main body portion 22 arranged so as to form the corner portion of the tread plate 1 to the other side (lower side) in the thickness direction of the tread plate, and the front end face 13 of the tread plate body 10 is entirely formed. The soft resin portion 21 having the covering piece portion 24 arranged so as to cover over the above is provided. Therefore, the cushioning property can be given to the entire front end face side of the tread 1.

Further, the hard resin portion 25 (side piece portion 26) that is harder than the soft resin portion 21 is provided on the side surface portion 16 facing the one side (front side) of the recess 14 in the depth direction of the tread, and the other side of the body 22 in the depth direction of the tread. It is configured to be fixedly provided to the main body portion 22 so as to be located between the side (rear side). Therefore, it is possible to reduce the amount of deformation of the side piece portion 26 with respect to the tread body 10 when a load is applied to the front corner of the upper surface of the tread 1, and to buffer the tread body 10 formed on the upper side. The step at the boundary with the member 20 can be reduced.
Further, the surface decorative sheet 30 is attached so as to cover the surfaces 26a, 22a, 22b, 24a of the side piece portion 26, the main body portion 22 and the cover piece portion 24 in a continuous manner, and to cover the upper surface 11 of the tread plate body 10. I am trying. Therefore, the cushioning member 20 can be made inconspicuous, and the appearance can be improved. Further, even when a load is applied to the front corner of the upper surface of the tread 1, the step difference at the boundary between the tread main body 10 and the cushioning member 20 formed on the upper side can be reduced. Damage to the surface decorative sheet 30 when a load is applied can be suppressed. Further, since the cover piece portion 24 that covers the entire front end surface 13 of the tread body 10 does not form a boundary portion between the tread body 10 and the cushioning member 20 on the front end surface side of the tread board 1, the front end surface side is surface-coated. The sheet 30 can be covered with a good appearance. Moreover, by this, damage to the surface decorative sheet 30 on the front end face side of the tread 1 can be suppressed.

Further, in this embodiment, the hard resin portion 25 having the side piece portion 26 is provided with the bottom piece portion 28 arranged so as to be located between the bottom surface portion 15 of the recess 14 and the main body portion 22. There is. In addition, the hard resin portion 25 is continuously extended from one end (front end) of the bottom piece 28 in the depth direction of the tread to the other side (lower side) in the thickness direction of the tread, and is fixed to the tread body 10 by the stopper 2. The fixing piece portion 29 is provided. Therefore, the cushioning member 20 can be relatively firmly fixed to the tread main body 10 by the stopper 2 fixed to the fixing piece portion 29.
In addition, the cover piece portion 24 is brought into contact with or separated from one side surface (front surface) of the fixing piece portion 29 in the depth direction of the tread so that the stopper attachment portion (head receiving recess) 29a of the fixing piece portion 29 can be exposed. It is arranged so as to cover one side (front side) of the fixed piece portion 29 in the depth direction of the tread as much as possible. Therefore, if the cover piece portion 24 is turned away from the front surface of the fixed piece portion 29, the stopper 2 can be fixed. Further, since the fixed piece 29 can be covered by the cover piece 24, it is possible to prevent the stopper 2 and the fixed piece 29 from being conspicuous on the front end face side of the tread 1.

Further, in the present embodiment, the front end receiving recess 18 for receiving the fixing piece 29 is provided at the front end of the tread body 10 so as to be continuous with the recess 14. Therefore, for example, the dimension of the fixed piece portion 29 along the tread thickness direction can be made smaller than that in which the fixed piece portion 29 is provided up to the other surface side (lower surface side) in the tread thickness direction. Further, the cover piece portion 24 can have a substantially uniform thickness as compared with a case where the cover piece portion 24 is provided with a receiving recess for receiving the fixed piece portion 29.

Next, an example of a tread according to another embodiment of the present invention will be described with reference to the drawings.
FIG. 3 is a diagram schematically showing an example of a tread according to the second embodiment.
The differences from the first embodiment will be mainly described, and the same configurations will be denoted by the same reference numerals, and the description thereof will be omitted or briefly described.

As shown in FIG. 3, the tread 1A according to the present embodiment differs from the first embodiment in that the cover piece portion 24A provided on the soft resin portion 21A of the cushioning member 20A and the front end surface 13A of the tread body 10A are configured. Mainly different.
In the present embodiment, the covering protrusion 24A is provided on the rear surface thereof with an engaging protrusion 24b that projects rearward, and the engaging protrusion 24b is fitted into the front end face 13A of the tread body 10A. The structure is provided with a mating recess 13a.

The engagement recess 13a of the tread body 10A is provided so as to open toward the front side on the front end surface 13A of the tread body 10A. The engaging recesses 13a may be provided at a plurality of positions at intervals in the direction along the stairs width direction, but in the illustrated example, they are provided over the whole so as to extend in the direction along the stairs width direction. It is shaped like a groove. Further, the engagement recess 13a is provided so as to open below the front end receiving recess 18 of the front end surface 13A of the tread body 10A. In addition, in the illustrated example, the engagement recess 13a has a substantially rectangular groove shape when viewed in the direction along the step width direction (the groove longitudinal direction).
The groove width dimension of the engagement recess 13a along the tread thickness direction and the groove depth dimension along the tread depth direction are set to appropriate dimensions so that the engagement projection 24b described later can be fitted therein.

The engagement protrusion 24b of the cover piece portion 24A is provided so as to protrude in a direction along the thickness direction of the cover piece portion 24A. The engagement protrusions 24b may be provided at a plurality of positions at intervals in the direction along the stairs width direction, but the engagement protrusions 24b may extend over the whole so as to extend in the direction along the stairs width direction corresponding to the engagement recesses 13a. Are provided. Further, the engagement protrusion 24b is provided with retaining pieces 24c, 24c that are brought into contact with the inner surface of the engagement recess 13a (both groove inner side surfaces) with deformation. The illustrated example shows an example in which the retaining pieces 24c, 24c are projected to both upper and lower sides. Further, a plurality of (three in the illustrated example) retaining piece portions 24c, 24c are provided on the upper and lower sides of the engaging protrusion 24b at intervals in the front-rear direction. The retaining pieces 24c, 24c are appropriately configured so that the engagement protrusion 24b fitted in the engagement recess 13a is hard to come off.

The footboard 1A according to the present embodiment also exhibits substantially the same effects as those of the first embodiment.
Further, in the present embodiment, the cover piece portion 24A is provided with the engagement protrusion 24b, and the front end surface 13A of the tread body 10A is provided with the engagement recess portion 13a into which the engagement protrusion 24b is fitted. Therefore, the cover piece portion 24A can be stably fixed to the front end surface 13A of the tread body 10A. Further, for example, when the cover piece portion 24A is fixed to both or one of the front end surface 13A of the tread body 10A and the front surface of the fixed piece portion 29 via an adhesive, the engagement protrusion 24b and the engagement The recess 13a can function as a temporary fixing until the adhesive is cured.

In addition, in each of the above-described embodiments, an example in which the fixing piece portion 29 is provided with the head-accommodating recess 29a as a fastener fixing portion is shown. May be provided or the surface may be flat.
Further, in each of the above-described embodiments, an example is shown in which the front end receiving recess 18 that receives the fixing piece portion 29 is provided in the tread body 10, 10A, but instead of such an aspect, the covering piece portions 24, 24A are provided. A configuration may be adopted in which a receiving recess for receiving the fixed piece portion 29 is provided. That is, even if the covering piece portions 24, 24A are formed such that the thickness dimension of the lower end portion is larger than that of the upper end portion so that a receiving recess opening toward the rear side is formed in the upper end portion. Good. Alternatively, the fixing piece portion 29 may be provided up to the other surface side in the thickness direction of the tread. Further, in addition to the fixed piece portion 29 and the fixed piece portion 29, the bottom piece portion 28 may not be provided in the cushioning members 20 and 20A.
Further, in each of the above embodiments, an example in which the first mounting groove 17 and the marking member 32 and the second mounting groove 19 and the marking member 32 are provided is shown, but one or both of them are provided. There may be no configuration.

1,1A tread plate 10,10A tread plate body 11 upper surface (one surface in the thickness direction)
13, 13A Front end face (one end face in the depth direction)
14 Recess 15 Bottom part 16 Side part 20,20A Buffer member 21,21A Soft resin part 22 Main part 22a Top surface (front surface)
22b Front (front)
24, 24A Cover piece portion 24a Front surface (front surface)
25 Hard Resin Part 26 Side Piece (Hard Resin Part)
26a Upper surface (front surface)
28 Bottom Piece 29 Fixed Piece 29a Head Housing Recess (Stopper Fastening Location)
30 Surface decorative sheet 2 Stopper

Claims (2)

A tread plate provided with a cushioning member in a recess provided so as to open toward one side in the thickness direction and one side in the depth direction at a corner between one surface in the thickness direction and one end surface in the depth direction of the tread body. hand,
The buffer member extends in a series from the main body portion arranged to form the corner portion of the tread plate to the other side in the thickness direction of the tread plate, and covers the one end face in the depth direction of the tread plate body over the whole. A soft resin portion having a cover piece portion disposed in the recess, a side surface portion of the recess facing one side in the depth direction of the tread, and the main body portion so as to be located between the other side of the body portion in the depth direction of the tread panel. And a hard resin portion that is harder than the soft resin portion that is fixedly provided in the
The hard resin portion, the main body portion and the surface of the cover piece portion are continuously covered, and a surface decorative sheet is attached so as to cover one side in the thickness direction of the tread body ,
In the hard resin portion, a bottom piece portion arranged so as to be located between the bottom surface portion facing the one side in the stepping plate thickness direction of the recess and the main body portion, and one side end of the bottom piece portion in the stepping plate depth direction. From the portion to the other side in the thickness direction of the tread, a fixed piece portion fixed to the tread body by a stopper is provided, and
The front end portion of the tread body is provided with a front end receiving recess that receives the fixing piece portion so as to be continuous with the recess.
The tread plate, wherein the fixed piece portion is provided such that its front surface is substantially flush with the front end surface of the tread plate body . In claim 1 ,
The cover piece portion can be brought into contact with and separated from one side surface of the fixing piece portion in the depth direction of the tread so that the fastening portion of the fixing piece can be exposed. A tread characterized by being arranged so as to cover.

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