JP2009084867A - Step tread - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a step tread which is excellent in non-skid performance, water permeability, and acoustic properties. <P>SOLUTION: The step tread 100 is mounted on an existing staircase, and formed of a porous elastic material 3 molded almost tabular, and a frame 2 holding the porous elastic material 3. The frame 2 has a fixing portion 21 fixed to each step S of the existing staircase, and a holding portion 22 holding the porous elastic material 3 on the step S. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stair tread plate attached to an existing staircase provided outdoors.

  Conventionally, with respect to an existing staircase provided outdoors, a slipper for preventing a fall from the staircase and a footboard for relieving footsteps when raising and lowering the staircase have been attached.

Patent Document 1 discloses a sound-absorbing anti-slip cover member for a staircase step plate. In this, the step of the staircase is covered over the upper surface, the front edge and the rear edge by a metal mounting plate and a horizontal thick plate of elastic material such as rubber material or soft plastic material provided on the upper surface thereof. Has the effect of soundproofing, anti-slip and anticorrosion.
Utility Model Registration No. 31007056

  In the technique of Patent Document 1, a large number of horizontal thick plate-like protrusions are formed integrally with the horizontal thick plate on the upper surface of the horizontal thick plate of the elastic material in a parallel state with a certain interval. That is, this cover member is in a state in which a large number of grooves are formed on the upper surface of the tread plate. When there is rain, water accumulates in the grooves and is directed toward the longitudinal direction of the grooves. There is a problem that it becomes slippery.

  Even if the horizontal plank-like protrusions provided on the upper surface of the horizontal plank are removed and the steps of the staircase are covered with an elastic material with a flat top surface, There is a problem in that a puddle is formed on the surface of the tread board and it becomes slippery.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a stair tread that is excellent in slip resistance, water permeability, and sound absorption.

  The stair tread of the present invention is a stair tread that is attached to an existing staircase, and includes a porous elastic material formed in a substantially flat plate shape, and a frame that holds the porous elastic material, The object is achieved by having a fixing portion fixed to each step of the existing staircase and a holding portion for holding the porous elastic material on the step.

  The porous elastic material is preferably formed by solidifying a number of hybrid aggregates obtained by attaching fine aggregates to rubber chips with a resin binder.

  The rubber chip is preferably obtained by pulverizing a waste tire.

  The fixing portion of the frame extends in the width direction of the staircase and has a shape that can be fixed to a kick-up surface of each step of the existing staircase. The holding portion of the frame is connected to the upper end of the fixing portion. Preferably it is.

  The holding portion of the frame has a lower support portion that extends in the depth direction of the step along the stepping surface of the step from the fixing portion in a state where the fixing portion is fixed to the kick-up surface. It is preferable that the porous elastic material is supported on the lower support portion.

  Moreover, it is preferable that the said lower side support part contains the several support material provided mutually spaced apart in the width direction of the said step.

  The holding portion of the frame has a mounting portion that is continuous in the width direction of the step and has a protruding portion that protrudes from the upper end of the fixing portion in the depth direction of the step. The protruding portion of the mounting portion It is preferable that the front ends of the respective support members are attached to each other.

  In addition to the lower support portion, the holding portion of the frame protrudes backward from the upper end of the covering portion and a covering portion that covers the porous elastic material supported on the lower support portion from the front. It is preferable to have a front holding part including a holding part that holds the front end of the porous elastic material together with the lower support part from above and below.

  Moreover, it is preferable that the said coating | coated part, the said clamping part, and the said fixing | fixed part are comprised with the board | plate material for single fixation.

  The frame includes a fixing plate, a mounting plate, and a plurality of support plates. The fixing plate extends upward from the fixing portion and the porous elastic material. A covering portion that covers from the front and a sandwiching portion that protrudes backward from the upper end of the covering portion, and the mounting plate is continuous in the width direction of the step and is fixed on the back surface of the fixing plate. A plurality of supporting plates extending in the depth direction of the step and spaced apart from each other in the width direction of the step. And the front end of each support plate is attached to the common protrusion, the porous elastic material is supported on each support plate, and the front end of the porous elastic material is connected to each support plate. It is preferable to be clamped from above and below by the clamping part. .

  According to the staircase tread plate of the first aspect, the porous elastic material held by the frame can be fixed on the tread surface by fixing the fixing portion of the frame to the step. Therefore, it is possible to prevent the porous elastic material from moving on the step when the stair tread is attached to an existing stair. In addition, the porous elastic material has a non-slip function due to its elasticity, and in the event of rainfall, etc., water is drained through the porous elastic material holes, so that the surface of the stair tread board is drained. Slip due to pooling is prevented, and footsteps when moving up and down the stairs are absorbed by an elastic material. Therefore, high slip resistance, water permeability and sound absorption can be imparted to the existing stairs.

  According to the stair stepping board according to claim 2, the porous elastic material is obtained by consolidating a hybrid aggregate obtained by attaching a fine aggregate to a rubber chip with a resin binder, and the fine aggregate attached to the surface of the rubber chip. As a result of this, fine irregularities are formed on the surface of the rubber chip, and even when wet, these fine irregularities serve as a non-slip function, so in addition to drainage and sound absorption, the porous material has excellent slip resistance when wet An elastic material can be obtained.

  According to the stair stepping plate of claim 3, since the rubber chip is obtained by pulverizing the waste tire, it is not necessary to newly manufacture the rubber chip from the raw material.

  According to the stair stepping plate of the fourth aspect, the fixing portion of the frame can be easily fixed to the step by using the kicking surface that is removed from the stepping surface covered with the porous elastic material in the step.

  According to the stair stepping plate of claim 5, since the porous elastic material is supported on the lower support portion extending in the depth direction of the step, the lower support portion is formed by the upper surface of the porous elastic material, that is, a passerby. This porous elastic material can be stably supported while exposing the surface to be stepped on and fully exhibiting its anti-slip function and the like. Further, even when the rigidity of the porous elastic material is low, the bending thereof can be effectively suppressed to prevent the porous elastic material from being damaged during transportation.

  According to the stair stepping plate according to claim 6, while the porous elastic material is effectively supported by the plurality of support materials, the water permeability is further improved by the gaps between the support materials, and the frame is also made only by the gaps. Weight reduction can be achieved.

  According to the stair stepping plate according to claim 7, by connecting these in a state where the front end of each support member is overlapped with the protruding portion of the mounting portion extending in the width direction of the step, the fixing portion and each of the supporting portions are connected via the protruding portion. The support material can be connected in a stable state.

  According to the stepping plate according to claim 8, in addition to the porous elastic material being supported by the lower support portion, the front end thereof (the end portion on the kick-up surface side) is protected by the covering portion, and the covering portion By sandwiching the porous elastic material with the lower support portion by the sandwiching portion connected to the upper end of the porous elastic material, the porous elastic material is more reliably held on the frame.

  According to the staircase tread plate according to claim 9, since the covering portion, the sandwiching portion and the fixing portion are made of a single fixing plate material, the structure of the frame can be simplified, and the strength can be improved by reducing the joint portion. Can be planned.

  According to the stair stepping plate according to claim 10, the front end of the porous elastic material (the end portion on the kick-up surface side) is protected by the covering portion by the fixing plate material that constitutes the fixing portion, the covering portion, and the sandwiching portion. When the sandwiching portion connected to the upper end of the covering portion sandwiches the porous elastic material with the lower support portion, the porous elastic material is more reliably held on the frame. In addition, since the covering portion, the sandwiching portion, and the fixing portion are formed of a single fixing plate material, the structure of the frame can be simplified, and the strength can be improved by reducing the joint portion. In addition, the mounting plate having a vertical portion fixed to the back surface of the fixing plate and a protruding portion protruding rearward from the vertical portion, and connecting these with the front end of each supporting material superimposed on the protruding portion. Thus, the fixing portion and each support member can be stably connected via the mounting plate member. Further, the upper surface of the porous elastic material, that is, the surface that can be stepped on by a passerby is exposed by a plurality of support plates extending in the depth direction of the step and spaced apart from each other in the width direction of the step. The porous elastic material can be stably supported while sufficiently exhibiting the anti-slip function and the like. Further, even when the rigidity of the porous elastic material is low, the bending thereof can be effectively suppressed to prevent the porous elastic material from being damaged during transportation. Further, while effectively supporting the porous elastic material by a plurality of support materials, the water permeability can be further improved by the gap between the support materials, and the weight of the frame can be reduced by the gap. These effects can be obtained with a simple structure by simply combining a plate material for fixing, a plate material for mounting, and a plurality of support plates.

  The stair tread of the present invention is a stair tread that is attached to an existing staircase, and includes a porous elastic material formed in a substantially flat plate shape, and a frame that holds the porous elastic material, A fixing portion that is fixed to each step of the existing staircase; and a holding portion that holds the porous elastic material on the step. That is, in the present invention, a porous elastic material with good water drainage is used for the stair tread to improve the slip resistance, sound absorption, and water permeability of the existing staircase.

  Below, the stair step board of this invention and the manufacturing method of this stair step board are demonstrated in detail using drawing.

(Embodiment 1)
FIG. 1 is a perspective view for explaining a stair tread plate 100 according to the present embodiment. As shown in FIG. 1, the stair tread 100 according to the first embodiment is attached to each step S of an existing stair to improve various performances (sound absorption performance, anti-slip performance, water permeability performance) of the stair. And is composed of a porous elastic material 3 and a frame 2 that holds the porous elastic material 3.

  FIG. 2 is a cross-sectional view for explaining a state in which the stair tread plate 100 of the present embodiment is attached to each step S of the staircase. As shown in FIG. 2, the stair tread plate 100 in which the porous elastic material 3 and the frame 2 are integrally provided is fixed to each step S of an existing stair mainly provided outdoors via screws 4. The In particular, when an existing staircase is provided outdoors and each step S is made of a steel plate, the stair tread 100 of the present embodiment is attached to each step, so that it is slippery, sound-absorbing, and drainage when wet. However, it is greatly improved.

  The width of the stair tread plate 100 is preferably about 5 to 10 cm smaller than the width of the staircase, that is, the width of each step S. Thus, by setting the length of the longitudinal side of the stair tread 100 slightly smaller than the width of the stair, a portion where the stair tread 100 is not placed on the tread surface S1 is generated, and rainwater or the like is generated from this portion. Since it can drain, drainage can be improved.

  FIG. 3 is a perspective view for explaining the frame 2 used for the stair tread plate 100 of the present embodiment. FIG. 4 is an enlarged view of a part of the cross section of the stair tread plate 100 of the present embodiment.

  As shown in FIGS. 3 and 4, the frame 2 has a fixing portion 21 fixed to the kicking surface S <b> 2 of the step S of the staircase, and the step S <b> 1 on the tread surface S <b> 1 of the step S with the fixing portion 21 fixed. And a holding portion 22 for holding the porous elastic material 3.

  The fixing part 21 is a belt-like flat plate. Screw holes 21a are formed in the fixing portion 21 at three locations along the longitudinal direction. As shown in FIG. 2, in the stair tread 100, the fixing portion 21 is fixed to the kicking surface S <b> 2 via the screw 4 in a state where one surface of the fixing portion 21 is in contact with the kicking surface S <b> 2 of step S. The Therefore, at the time of attachment, the operator can easily fix the stair tread plate 100 from the front of the staircase using the kick-up surface S2.

  The holding portion 22 is bonded to the lower surface of the porous elastic material 3, and is provided with a lower support portion 22a for supporting the porous elastic material 3 from below, and a front side of the porous elastic material 3 (on the side of the kicking surface S2 of step S). ) And a mounting portion 23 for connecting the lower holding portion 22a to the fixing portion 21. In other words, the porous elastic material 3 is supported on the lower support portion 22a extending in the depth direction of Step S by the lower support portion 22a. As a result, the lower support portion 22a stably supports the porous elastic material 3 while exposing the upper surface of the porous elastic material, that is, the surface that is stepped on by a passerby to sufficiently exhibit its anti-slip function.

  The lower support portion 22a includes a support member 22a1 having a plurality of strips that are spaced apart from each other in the longitudinal direction of the fixed portion 21. Each support member 22a1 is indirectly integrated with the fixing portion 21 by being fixed to a mounting portion 23 described later. According to the lower support portion 22a of the present embodiment, while effectively supporting the porous elastic material, the water permeability is further improved by the gap between the support materials 22a1, and the weight of the frame is reduced by the gap. be able to. Moreover, even when the rigidity of the porous elastic material 3 is low, the bending thereof can be effectively suppressed to prevent the porous elastic material from being damaged during transportation.

  The front holding portion 22b sandwiches the front end of the porous elastic member 3 together with the lower support portion 22a from above and below, with a covering portion 22b1 for covering the edge of the porous elastic member 3 (the side edge on the kick-up surface side) from the front. And a sandwiching portion 22b2.

  The covering portion 22 b 1 extends further upward from the upper end of the fixed portion 21 and is provided integrally with the fixed portion 21. The covering portion 22b1 is formed so as to extend in the width direction of Step S, similarly to the fixing portion 21. The covering portion 22b1 covers the front end (the kick-up surface S2 side) of the porous elastic material 3 supported on the lower support portion 22a from the front.

  The clamping part 22b2 is provided integrally with the covering part 22b1 so as to extend rearward from the upper end of the covering part 22b1. The clamping part 22b2 is formed so as to extend along the longitudinal direction of the covering part 22b1 (along the width direction of step S). The cross section of the sandwiching portion 22b2 has a shape such that the tip thereof faces toward the lower support portion 22a (projects backward). And the front-end part of the porous elastic material 3 is clamped from the upper and lower sides by the front-end | tip of this clamping part 22b2, and the lower side support part 22a. Therefore, the porous elastic material 3 is more reliably held by the frame 2.

  In a state where the stair tread plate 100 is attached to the step S, the front holding part 22b is located at the upper part of the end of the front end of the step S (the kicking surface S2 side). The upper part of the front end of each step S is the most frequently used part of a person who goes up and down the stairs. Thus, the front end of the porous elastic material 3 can be protected by covering the front end of the porous elastic material 3 with the front holding portion 22b. Further, since the front holding portion 22b is provided so as to cover the front end of the porous elastic material 3, the forward movement of the porous elastic material 3 can be prevented more reliably.

  Here, in the present embodiment, the fixing portion 21 and the front holding portion 22b (the covering portion 22b1 and the sandwiching portion 22b2) are configured by a single fixing plate material. Thus, by constituting the front side portion of the frame 2 with a single plate material, the structure can be simplified, and the fixing portion 21 and the covering portion 22b1, the covering portion 22b1 and the sandwiching portion 22b2 can be simplified. Since it is not necessary to provide a joint part between them, the joint part can be reduced and the strength can be improved.

  The attachment portion 23 of the holding portion 22 is a member formed so as to extend along the longitudinal direction of the fixed portion 21 (along the width direction of step S). Moreover, as shown in FIG. 3 and FIG. 4, the attachment portion 23 has a substantially L-shaped cross section. That is, the attachment portion 23 includes a vertical portion 23b in which the attachment portion 23 itself is directly fixed to the fixing portion 21, and a protruding portion 23a fixed in a state where the front end of the lower support portion 22a overlaps the upper surface. The vertical portion 23b is fixed to one surface of the fixed portion 21 along the longitudinal direction of the fixed portion 21 (continuously in the width direction of the step). The protruding portion 23a is provided integrally with the vertical portion 23b so as to protrude in the horizontal direction, that is, the depth direction of the step S of the staircase (the right direction in FIG. 4). By using the attachment portion 23, the fixed portion 21 and the support member 22a1 can be stably connected.

  In the present embodiment, the frame 2 is simply formed by combining three plate members, the fixing plate member, the plate member constituting the attachment portion 23, and the plurality of support plates constituting each support member 22a1. ing.

  The material of the frame 2 is not particularly limited, and for example, steel, iron, aluminum, stainless steel and the like can be used. In the present embodiment, steel that has been subjected to hot dip galvanizing is used.

  The porous elastic material 3 is obtained by solidifying a hybrid aggregate obtained by attaching a fine aggregate to a rubber chip with a resin binder. The porous elastic material 3 may contain a paint such as a colorant as desired. In particular, when a phosphorescent paint or a fluorescent paint is included as a paint, by providing the stair tread plate 100, a pedestrian can be alerted to the steps of the stairs in the dark.

  The porous elastic material 3 is a member that has a substantially rectangular shape in plan view and is formed into a substantially flat plate shape.

  As the rubber chip used for the hybrid aggregate, those obtained by pulverizing waste tires can be used. Thus, by reusing the rubber chip obtained by pulverizing the waste tire, it is not necessary to newly manufacture the rubber chip from the raw material.

  Although it does not specifically limit as a fine aggregate, For example, the pulverized material of agate sand, the pulverized material of a natural stone, the pulverized material of an artificial stone, the resin-type chip | tip, and the mixture containing at least 1 sort (s) of these fine aggregates are used. be able to.

  The hybrid aggregate is obtained by attaching a fine aggregate to a rubber chip. The method for producing the hybrid aggregate is not particularly limited. For example, after treating the surface of the rubber chip with a surface treatment agent, the rubber chip is coated with an adhesive resin (such as an epoxy resin) and coated with the adhesive resin. A small amount is put into a large amount of fine aggregate, and the fine aggregate is attached to the surface of the rubber chip. In particular, when the porous elastic material 3 is wet, the fine aggregate attached to the surface of the rubber chip forms fine irregularities on the surface of the hybrid aggregate, and the fine irregularities make the porous even when wet. The sliding resistance of the elastic material is ensured.

  The average particle size of the hybrid aggregate is preferably about 0.1 to 6.5 mm. When the average particle size of the hybrid aggregate is less than 0.1 mm, the gap in the porous elastic material 3 is reduced, and the drainage tends to be inferior. Moreover, when the average particle diameter of the hybrid aggregate exceeds 6.5 mm, irregularities on the surface of the porous elastic material 3 tend to appear remarkably.

  Although it does not specifically limit as a hybrid aggregate, For example, what mixed 2 or more types of hybrid aggregates from which an average particle diameter differs may be used, or 2 or more types of hybrid aggregates from which hardness differs were mixed. A mixture of two or more hybrid aggregates having different average particle diameters and hardnesses may be used. In the present embodiment, a mixture of two or more hybrid aggregates having different average particle sizes is used. In the present embodiment, the volume ratio is 5% or less for the hybrid aggregate having an average particle diameter of less than 1 mm, and 95% or more for the hybrid aggregate having an average particle diameter of 1 to 5 mm.

  Although it does not specifically limit as a resin binder, For example, thermosetting resins, such as an epoxy resin and a polyurethane resin, can be used. In this embodiment, a polyurethane resin is used.

  The porosity of the porous elastic material 3 is preferably about 15 to 45%. If the porosity of the porous elastic material 3 is less than 15%, water drainage tends to deteriorate. Moreover, when the porosity of the porous elastic material 3 exceeds 45%, the rigidity of the porous elastic material 3 tends to decrease.

  The thickness of the porous elastic material 3 is preferably about 5 to 12 mm. If the thickness of the porous elastic material 3 is less than 5 mm, sound absorption performance and walking comfort tend to be inferior. On the other hand, if the thickness of the porous elastic material 3 exceeds 12 mm, the weight of the entire stair tread plate 100 tends to increase, which tends to cause difficulty during transportation.

  With this configuration, a method for manufacturing the stair tread plate 100 of the present embodiment will be described in detail below. In the manufacturing method of the stair step board 100 of the present embodiment, (1) the step of masking the frame 2 and (2) the hybrid aggregate and the resin binder (raw material of the porous elastic material 3 having fluidity) are kneaded. A step, (3) a step of placing the frame 2 in the mold, and pouring the kneaded raw material of the porous elastic material 3 into the mold, and (4) a porous elastic material poured into the mold And (5) removing the stair tread plate 100 from the mold. Below, each process is demonstrated in detail.

(1) Step of masking the frame 2 The operator does not need to directly contact the porous elastic material 3 with the frame 2 so that the paint of the porous elastic material 3 does not adhere to the frame 2, specifically, Then, a masking tape is applied to the portion excluding the protrusion 23a of the attachment portion 23 and the upper surface of the lower support portion 22a.

(2) Step of kneading the raw material of the porous elastic material 3 First, the operator creates the raw material of the porous elastic material 3. Specifically, a hybrid aggregate, a liquid resin binder, and a paint are blended at a predetermined ratio and kneaded with a stirrer or the like. Here, as for the hybrid aggregate, several types of hybrid aggregates having different average particle diameters are prepared and mixed at a predetermined ratio. The kneading is performed for about 3 to 5 minutes by appropriately adjusting the rotation speed of the stirrer. The hybrid aggregate is obtained by attaching a fine aggregate to the surface of a rubber chip. Therefore, fine irregularities are formed on the surface of the hybrid aggregate. This unevenness makes it possible to form minute gaps between the resin binders, and finally to form the porous elastic material 3.

(3) The process of disposing the frame 2 in the mold and pouring the raw material of the porous elastic material 3 into the mold First, the operator puts the mold m in a shape surrounding the outline of the frame 2 in plan view. prepare. A primer is previously applied to the frame 2 by air, brush, or the like. Here, the primer is a reactive resin responsible for adhesion between the frame 2 and the porous elastic material 3. In this embodiment, a primer obtained by adding ethyl acetate to an acrylic urethane resin is used as a primer.

  And an operator arrange | positions the flame | frame 2 in this formwork (refer Fig.5 (a)).

  Next, the mixture having the fluidity of the hybrid aggregate and the resin binder obtained in the step (2) is molded in a predetermined amount so as to cover the entire upper portion of the lower support portion 22a of the frame 2. Pour into the frame (see FIG. 5B).

(4) The step of leveling the raw material of the porous elastic material so as to have a predetermined thickness. Next, the operator can obtain a mixture 3a of the hybrid aggregate and resin binder poured into the mold m. Use a rake, iron, etc. to level the surface evenly. At this time, the operator levels the mixture so that the mixture is sufficiently distributed to the corners of the formwork and the gaps between the sandwiching portion 22b2 and the lower support portion 22a and the attachment portion 23 (see FIG. 5B).

  Next, in order to increase the flatness of the mixture 3a of the hybrid aggregate and the resin binder, the operator uses an electric heating roller R, a special iron, an iron or the like to hybridize the hybrid aggregate to a substantially uniform thickness. And a mixture 3a of resin binder are pressed.

  Here, since the polyurethane resin which hardens | cures at normal temperature is used for the resin binder, a liquid resin binder begins to harden | cure gradually (refer FIG.5 (c)).

  Further, the porous elastic material 3 and the lower support portion 22a of the frame 2 are bonded through a primer.

  At this time, the porous elastic material 3 has a large number of gaps between a large number of hybrid aggregates when the curing of the resin binder is almost completed. The water that has reached the upper surface of the stair tread board 100 passes through these gaps and is drained below the stair tread board 100.

(5) Step of removing the stair tread plate 100 from the mold frame Next, the operator removes the stair tread plate 100 in which the frame 2 and the porous elastic material 3 are integrated from the mold frame. Finally, the masking tape attached to the frame 2 is peeled off to complete the stair tread plate 100.

  Thus, since the porous elastic material 3 is molded on the frame 2 so as to be integrated with the frame 2, the frame 2 and the porous elastic material 3 can be easily assembled to the frame 2 after the porous elastic material 3 is assembled to the frame 2. The material 3 can be integrated.

  According to the above embodiment, since the porous elastic material 3 formed in a substantially flat plate shape and the frame 2 are provided, and the porous elastic material 3 is fixed to each step S of the staircase by the frame 2, the frame The porous elastic material 3 held by the holding portion 22 provided in 2 is indirectly fixed on the tread surface S1 of each step S of the staircase. Therefore, it is possible to prevent the porous elastic material 3 from moving on the step S when the stair tread plate 100 is attached to an existing staircase. Further, since the porous elastic material 3 is provided on the step S, water is drained through the holes of the porous elastic material 3 when there is rain or the like. Therefore, slippage due to the accumulation of water on the surface of the stair tread is prevented. Furthermore, since the porous elastic material 3 is a material having elasticity, it absorbs footsteps when the stairs are raised and lowered. Therefore, the step board 100 excellent in slip resistance, water permeability, and sound absorption can be obtained.

  In the above-described embodiment, the case where the porous elastic material 3 is a hybrid aggregate obtained by attaching a fine aggregate to a rubber chip and bonded with a resin binder has been described. It is not limited to the above, and the porous elastic material may be a material having elasticity that includes bubbles and is molded into a substantially flat plate shape. Alternatively, a certain number of through holes formed per unit area may be used.

  Further, in the above-described embodiment, a description has been given of a mode in which a plurality of support members 22a1 extending in the depth direction of step S and spaced apart from each other in the width direction of step S are provided as the lower support portion 22a. However, the present invention is not limited to this, and a member extending in the width direction of the step is used as the second support material so as to be spanned over a plurality of support materials provided at intervals in the width direction. May be. Further, the lower support portion 22a may be a single flat plate.

  Moreover, in the said embodiment, although the lower side support part 22a and the attaching part 23 were demonstrated as the form provided as another member, the protrusion part 23a of the attaching part 23 is extended in the depth direction of step S, and this is used. The lower support portion 22a may be used.

  Moreover, although the said embodiment demonstrated the form using the thing obtained by solidifying with the resin binder the hybrid aggregate which attached the fine aggregate to the rubber chip as the porous elastic material 3, The invention is not limited to this, and a mixture of a hybrid aggregate and a rubber chip having different average particle diameters and hardnesses, or a mixture of a hybrid aggregate and a hard aggregate having different average particle diameters and hardnesses is used as a resin. You may use what was obtained by solidifying with a binder.

  Moreover, in the said embodiment, when producing the raw material of the porous elastic material 3, although the form which included the hybrid aggregate, the resin binder, and the coating material was demonstrated, this invention is not limited to this. The photocatalyst may be included in the raw material of the porous elasticity 3. By including a photocatalyst in the raw material of the porous elastic material 3, the antifouling property and the antibacterial property of the stair tread can be improved.

  In the above embodiment, as the resin binder, a polyurethane resin of a type that cures at room temperature was used, and the form in which the resin binder was cured at room temperature was described, but the present invention is not limited to this, As the resin binder, a thermosetting resin of a type that cures at a high temperature may be used, and the resin binder may be heated and cured.

It is a perspective view for demonstrating the whole stair tread of Embodiment 1. FIG. It is sectional drawing for demonstrating the state which attached the stair step board of Embodiment 1 to the staircase. FIG. 3 is a perspective view for explaining a frame used for the stair stepping plate of the first embodiment. FIG. 3 is a cross-sectional view taken along the line XX for explaining the stair tread of the first embodiment. It is a figure for demonstrating the manufacturing method of the stair tread of Embodiment 1, (a) is a figure for demonstrating the state which arrange | positions a flame | frame to a formwork, (b) is porous in a formwork Cross-sectional view for explaining the process of pouring the raw material of the elastic material and leveling the surface, (c) is a cross-sectional view for explaining the process of pressurizing the raw material of the porous elastic material poured into the mold is there.

Explanation of symbols

2 Frame 21 Fixed part 22 Holding part 22a Lower support part 22a1 Support material 22b Covering part 22c Holding part 23 Mounting part 23a Protruding part 3 Porous elastic material 3a Raw material of porous elastic material 100 Stair stepping plate S Step S1 Tread surface S2 Kicking up Surface m Formwork

Claims (10)

A stair treadboard attached to an existing staircase,
A porous elastic material formed in a substantially flat plate shape;
A frame for holding the porous elastic material,
The frame is a stair tread having a fixing part fixed to each step of the existing staircase and a holding part for holding the porous elastic material on the step.   The stair stepping board according to claim 1, wherein the porous elastic material is formed by consolidating a plurality of hybrid aggregates obtained by attaching fine aggregates to rubber chips with a resin binder.   The stair stepping board according to claim 2, wherein the rubber chip is obtained by pulverizing a waste tire. The fixing portion of the frame extends in the width direction of the staircase, and has a shape that can be fixed to a kick-up surface of each step of the existing staircase,
The stair tread according to any one of claims 1 to 3, wherein the holding portion of the frame is connected to an upper end of the fixed portion.   The holding portion of the frame has a lower support portion that extends in the depth direction of the step along the tread surface of the step from the fixing portion in a state where the fixing portion is fixed to the kick-up surface. The stair tread plate according to claim 4, wherein the porous elastic material is supported on a support portion.   The step support plate according to claim 5, wherein the lower support portion includes a plurality of support members provided at intervals in the width direction of the step.   The holding portion of the frame has a mounting portion that is continuous in the width direction of the step and has a protruding portion that protrudes from the upper end of the fixing portion in the depth direction of the step. The stair tread plate according to claim 6, wherein the front ends of the supporting members are attached so as to overlap each other.   In addition to the lower support portion, the holding portion of the frame includes a covering portion that covers the porous elastic material supported on the lower support portion from the front, and projects backward from the upper end of the covering portion to the porous portion. The stair tread plate according to any one of claims 5 to 7, further comprising a front holding portion including a holding portion that holds the front end of an elastic material together with the lower support portion from above and below.   The stair tread plate according to claim 8, wherein the covering portion, the sandwiching portion, and the fixing portion are formed of a single fixing plate material. The frame includes a fixing plate, a mounting plate, and a plurality of support plates.
The fixing plate material comprises the fixing portion, a covering portion that extends upward from the fixing portion and covers the porous elastic material from the front, and a sandwiching portion that protrudes backward from the upper end of the covering portion,
The mounting plate has a vertical portion that is continuous in the width direction of the step and is fixed on the back surface of the fixing plate, and a protruding portion that protrudes rearward from the vertical portion.
The plurality of support plates extend in the depth direction of the step and are arranged in a posture spaced apart from each other in the width direction of the step, and the front ends of the support plates are attached to the common protrusion.
6. The porous elastic material is supported on each of the support plates, and a front end of the porous elastic material is sandwiched from above and below by the support plates and the clamping portion. Stair tread as described.

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