JP2012077521A - Staircase structure and construction method of floor material for staircase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a staircase structure in which the entire floor material for the staircase and the staircase are excellently bonded.SOLUTION: A staircase structure 11 of this invention includes: a staircase for which a tread 12 and a riser 13 are constructed roughly orthogonally at a nosing part 14; and a floor material 1 for the staircase for which a tread laying part 2 laid on the tread 12 of the staircase and a riser laying part 3 laid on at least the upper part of the riser 13 are connected roughly in an L shape through a bend part 4. A part of the riser laying part 3 of the floor material 1 for the staircase is bonded to the staircase through a double-sided adhesive tape 7, and a length X from the upper end of the double-sided adhesive tape 7 to the lower end of the rise laying part 3 is 1/2 to 4/5 times of a length Y from the back surface of the tread laying part 2 to the lower end of the rise laying part 3. The floor material 1 for the staircase other than the double-sided adhesive tape 7 is bonded to the staircase through an adhesive layer 8, and the adhesive layer 8 is a hard layer of an adhesive having viscosity exceeding 100,000 mPa s.

Description

  The present invention relates to a staircase structure of various structures such as ordinary houses, apartments, and office buildings.

Conventionally, floor materials for stairs are laid on the stairs so as to cover the tread surface of the stairs.
In Patent Document 1, the overlapping part of the staircase floor material and the tread surface is adhered by an adhesive, and the overlapping part of the staircase floor material and the corner part is adhered by a sealing agent. A staircase structure in which overlapping portions are bonded with an adhesive is disclosed.
However, in this staircase structure, in order to construct one staircase floor material, it is necessary to use three types of adhesives, sealing agents, and adhesives, which is very complicated.

  Further, in Patent Document 2, when a floor material for a stair having a tread surface portion, a corner portion, and a kick-up portion is applied to a staircase, 1/2 or more of the kick-up portion following the corner portion has a viscosity of 8000 to 100,000 mPa · s, thixo It is disclosed that the coefficient is 4.0 or more and the 90-degree peeling adhesive strength is adhered by an adhesive having a strength of 20 N / 25 mm or more, and the other lower end portion of the kick-up portion is adhered by an adhesive.

  However, as in Patent Document 2, when an adhesive having a relatively low viscosity is used, the adhesive filled in the gap between the raised portion and the corner portion of the staircase floor and the staircase may flow downward. When the adhesive flows downward as described above, the thickness of the adhesive at the kick-up portion becomes non-uniform, and the gap at the corner portion is not completely filled with the adhesive, and a cavity may be formed in part. When such a cavity occurs, the floor material for the staircase is not in close contact with the staircase in that part, so that the floating of the floor material for the staircase spreads when the pedestrian steps on while using it for a long time, or There is a possibility that the corner portion of the floor material for stairs corresponding to the hollow portion may be damaged by the load of the pedestrian. In addition, when the thickness of the adhesive at the kick-up portion is not uniform, the adhesiveness of the portion where the adhesive is thin becomes relatively weak, so that it is easy to partially peel off.

  In addition, when an adhesive with a relatively low viscosity is used, the adhesive applied to the tread surface of the staircase tends to flow to the nose part according to the gradient of the tread surface while taking the open time. The thickness tends to be non-uniform. For this reason, the part which adhere | attached strongly with respect to the tread of a staircase and the part which adhere | attached weakly may arise in the tread part of the floor material for stairs. In particular, when the tread surface is uneven, adhesion between the convex portion of the tread surface and the tread surface portion of the staircase floor material becomes insufficient due to the flow of the adhesive.

  In addition, the adhesive applied to the tread surface of the staircase flows to the nose part, resulting in excess adhesive at the nose part, and the adhesive between the corner part of the staircase floor and the nose part hangs downward. In some cases, the adhesive adheres to the pressure-sensitive adhesive of the kick-up portion, thereby hindering the adhesion of the kick-up portion by the pressure-sensitive adhesive.

Japanese Patent No. 3191143 Japanese Patent No. 3736524

A first object of the present invention is to provide a staircase structure in which a staircase floor material and a staircase are in good contact.
A second object of the present invention is to provide a method for constructing a staircase floor material that can satisfactorily adhere the stair floor material to the staircase and can be easily constructed.

  The floor material for a staircase of the present invention is a staircase in which a tread surface and a lift surface are constructed substantially orthogonally at a nose portion, a tread surface laying portion laid on the tread surface of the staircase, and a lift surface of the staircase A stepped floor laying part provided in a substantially L shape via a bent part, and a part of the kicking surface laying part of the floor material for the staircase, The length X from the upper end of the double-sided adhesive tape to the lower end of the kicking surface laying portion is the length from the back surface of the treading surface laying portion to the lower end of the kicking surface laying portion. The portion of the floor material for stairs other than the portion adhered by the double-sided pressure-sensitive adhesive tape is adhered to the stairs via an adhesive layer, and the adhesive. Layer is a BH viscometer and rotor no. 7 and a cured layer of an adhesive having a viscosity measured under conditions of 23 ° C. and 10 rpm exceeding 100,000 mPa · s.

In a preferred staircase structure of the present invention, the double-sided pressure-sensitive adhesive tape has a base material and a pressure-sensitive adhesive provided on both surfaces of the base material, and the base material contains polyethylene and ethylene vinyl acetate with an expansion ratio of 5 It is a foamed resin sheet having a thickness of 1 mm or more.
In another preferable step structure of the present invention, the length from the lower end to the upper end of the double-sided pressure-sensitive adhesive tape is 20 mm to 35 mm.

According to another situation of this invention, the construction method of the floor material for stairs is provided.
In this construction method of the floor material for stairs, the tread surface laying portion laid on the tread surface of the stairs and the kicking surface laying portion laid at least above the kicking surface of the stairs are substantially L-shaped via the bent portion. When constructing the staircase floor material continuously provided on the staircase, a part of the raised surface laying portion of the staircase floor material is set to a length X from the lower end of the raised surface laid portion to the upper end of the double-sided adhesive tape. Was adhered to the stairs via a double-sided adhesive tape that was 1/2 to 4/5 times the length Y from the lower end of the kick-up surface laying part to the back surface of the tread laying part, and was adhered by the double-sided adhesive tape The parts of the floor material for the staircase other than the part are the BH viscometer and the rotor No. 7 and using an adhesive having a viscosity measured under conditions of 23 ° C. and 10 rpm exceeding 100,000 mPa · s.

In the staircase structure of the present invention, the staircase floor material and the staircase foundation are in good contact, and there is substantially no cavity between the staircase flooring material and the staircase foundation. There is no possibility that a part of the floor material for stairs floats up or a part of the floor material for stairs corresponding to the hollow portion is damaged by the load of the pedestrian.
Further, the method for constructing a staircase floor material of the present invention facilitates a staircase structure in which a staircase floor material and a staircase foundation are in good contact with each other, and there is substantially no cavity between the staircase flooring and the staircase foundation. Can be obtained by simple work.

The side view containing the partial cross section of the staircase structure of this invention. The top view of the floor material for stairs. The right side view. The center part omission enlarged sectional view cut | disconnected by the AA line of FIG. The reference perspective view which shows the condition of the application | coating operation | work of the adhesive agent to the back surface of the floor material for stairs.

The present invention will be described below with reference to the drawings.
In addition, in this specification, as a term indicating a direction, for convenience, “up” is a side going up the stairs, “down” is a side going down the stairs on the contrary, “front” is a side going up the stairs, On the side away from the kicking surface, “rear” means the side approaching the kicking surface on the contrary, and “width direction” means the direction orthogonal to both the vertical direction and the front-rear direction.
In this specification, the description “P to Q” means P or more and Q or less.

<Stair structure>
In FIG. 1, 11 shows the staircase structure of this invention.
The staircase structure 11 includes a staircase in which a tread surface 12 and a kick-up surface 13 are constructed substantially orthogonally at a nose portion 14, a tread surface laying portion 2 laid on the tread surface 12 of the staircase, and a kick-up surface 13 of the stairs. And a raised floor laying portion 3 laid on at least an upper portion of the stairs, and a staircase flooring 1 connected in a substantially L shape via a bent portion 4.

A part of the raised surface laying portion 3 of the staircase floor material 1 is bonded to the raised surface 13 of the staircase through a double-sided adhesive tape 7. This double-sided pressure-sensitive adhesive tape 7 has a length X from the upper end of the double-sided pressure-sensitive adhesive tape 7 to the lower end of the kicking surface laying portion 3 that is 1 / L of the length Y from the back surface of the treading surface laying portion 2 to the lower end of the kicking surface laying portion 3. It arrange | positions so that it may become 2 times-4/5 times.
The length X from the upper end of the double-sided pressure-sensitive adhesive tape 7 to the lower end of the kicking surface laying portion 3 exceeds 4 times the length Y from the back surface of the treading surface laying portion 2 to the lower end of the kicking surface laying portion 3. / 5 times or less is preferable, and 2/3 times to 4/5 times is more preferable.

The portion of the staircase flooring 1 other than the portion adhered by the double-sided pressure-sensitive adhesive tape 7 is adhered to the upper portion of the stepped-up surface 13, the nose portion 14, and the tread surface 12 through the adhesive layer 8. The adhesive layer 8 is composed of a cured layer of an adhesive having a viscosity exceeding 100,000 mPa · s. The viscosity of the adhesive was measured in accordance with JIS K 6833, and the BH viscometer and rotor No. 7 and measured at 23 ° C. and 10 rpm.
In FIG. 1, reference numeral 91 denotes a caulking seal portion that fills a step formed between the lower end of the kick-up surface laying portion 3 and the surface of the lower tread surface laying portion 2.

<Stairs for construction>
This staircase flooring 1 is laid on stairs of various structures such as apartments, commercial facilities, educational facilities, medical welfare facilities, office buildings, and general houses.
The stairs to be constructed are well-known stairs constructed in various structures such as apartments, commercial facilities, educational facilities, medical welfare facilities, office buildings, and general houses. The staircase has a structure in which the tread surface 12 and the kick-up surface 13 are constructed in a substantially orthogonal shape in the nose portion 14, and the tread surface 12 and the kick-up surface 13 are continuous in a multi-step shape. The nosing portion 14 is a connecting portion between the front end of the tread surface 12 and the upper end of the kicking surface 13. In the present specification, the kicking surface 13, the nose portion 14, and the tread surface 12 of the staircase may be collectively referred to as a staircase base.

The term “substantially orthogonal” should not be interpreted as a strict meaning that the internal angle formed by the tread surface 12 and the kicking surface 13 is 90 degrees, and the internal angle includes 90 degrees ± 10 degrees. In general stairs, the internal angle is often 80 to 90 degrees.
Moreover, the tread 12 of the stairs may have a slope. The gradient of the tread surface 12 means that it gradually decreases as the tread surface 12 approaches the nose portion 14. The angle of the gradient is usually about 1 to 5 degrees. The angle of the gradient refers to an angle formed by the tread surface 12 and a horizontal plane.

<Examples of floor materials used for stairs>
1 to 4, a staircase flooring 1 includes a tread surface laying portion 2 laid on a tread surface 12 of the stairs and a kick surface laying portion 3 laid on a kick surface 13 of the stairs. And a bent portion 4 laid on the stair nosing portion 14 of the staircase.
The tread laying portion 2 is formed to have a length that can cover the entire tread tread 12 and the upper kick-up surface 13. The tread laying portion 2 having such a length is bent at a position corresponding to the corner 15 of the staircase. But the tread surface laying part 2 may be formed in the length which can be laid only on the tread surface 12 of a staircase.
The kick-up surface laying portion 3 is formed to a length that can cover the upper portion of the step-up kick surface 13. For example, the vertical length of the kick-up surface laying portion 3 is 3 cm to 7 cm.

The bent portion 4 is a connecting portion between the front end of the tread surface laying portion 2 and the upper end of the kick surface laying portion 3, and the tread surface laying portion 2 and the kick surface laying portion 3 as a whole are substantially L-shaped. The bent portion 4 is bent in an arc shape as shown in the figure.
The internal angle formed by the extension line on the back surface of the tread surface laying portion 2 and the extension line on the back surface of the kick surface laying portion 3 is, for example, 90 degrees ± 10 degrees, and preferably between the tread surface 12 and the kick surface 13 of the stairs. It is the same as the inner angle formed, more preferably smaller than the inner angle, and particularly preferably about 5 degrees smaller than the inner angle.

  The stair flooring 1 formed from a synthetic resin molded product can slightly widen the angle between the tread surface laying portion 2 and the kicking surface laying portion 3 when a force is applied. Accordingly, the floor material 1 for a staircase 1 in which the inner angle formed by the tread surface laying portion 2 and the kicking surface laying portion 3 is smaller than the inner angle of the angle formed by the tread surface 12 and the kicking surface 13 is laid at the time of construction. By pulling while pressing the portion 3 against the kicking surface 13, the kicking surface laying portion 3 can be laid in close contact with the kicking surface 13.

The tread surface laying portion 2, the bent portion 4, and the kicking surface laying portion 3 are integrally formed from a synthetic resin molded product.
Specifically, as shown in FIGS. 3 and 4, the layer structure of the staircase flooring 1 includes a substantially L-shaped first forming layer 51 that forms the entire staircase flooring 1, and a staircase flooring. Provided on the surface side of the first forming layer 51 corresponding to the bent portion 4 of the material 1 and the front end portion of the tread surface laying portion 2 and the upper end portion of the kicking surface laying portion 3, and is substantially shorter than the first forming layer 51. And an L-shaped second forming layer 52.
The first forming layer 51 has at least a flexible synthetic resin layer 514 and a reinforcing layer containing fibers, and is formed in a substantially L shape as a whole. Although the reinforcing layer may be one layer, it is preferable that two reinforcing layers are provided independently. Hereinafter, in order to distinguish the two reinforcing layers, they are referred to as a first reinforcing layer and a second reinforcing layer.

  The first reinforcing layer 511 and the second reinforcing layer 512 may be the same or the same, but are preferably different. By using the first reinforcing layer 511 and the second reinforcing layer 512 made of different materials, the bending strength and tensile strength of the synthetic resin layer 514 can be further improved. The material of the fiber of the 1st reinforcement layer 511 and the fiber of the 2nd reinforcement layer 512 is not specifically limited, For example, synthetic resin fibers, such as polyester series and polyolefin series; Inorganic fibers, such as glass and carbon; Natural fiber etc. Can be mentioned.

In the present embodiment, the first forming layer 51 has a layer configuration in which a surface layer, a synthetic resin layer 514 in which a second reinforcing layer 512 is embedded, and a first reinforcing layer 511 are stacked in order from the top. It is composed of
A surface layer is a conventionally well-known layer, for example, has a transparent surface protective layer and a design layer in order from the top. However, the surface layer is not shown.

The synthetic resin layer 514 includes a resin as a main component and is a flexible layer that can be bent easily by human power. As the synthetic resin layer 514, a soft thermoplastic resin sheet is generally used.
Examples of the thermoplastic resin include: vinyl chloride resin; olefin resin; vinyl acetate resin such as ethylene-vinyl acetate copolymer; acrylic resin such as ethylene-methacrylate resin; amide resin; ester resin; Examples include various elastomers such as elastomers and various elastomers such as styrene-based elastomers; rubbers and the like.

A vinyl chloride resin is preferred because it has excellent flexibility. The staircase flooring 1 having the synthetic resin layer 514 mainly composed of a vinyl chloride resin has a good walking feeling and can be easily bent along the corners of the staircase. In addition, the vinyl chloride resin is inexpensive, and when it is used, the staircase flooring 1 can be easily manufactured.
The synthetic resin layer 514 may contain additives such as a filler, a plasticizer, a flame retardant, a stabilizer, an antioxidant, a lubricant, a colorant, and a foaming agent.

The synthetic resin layer 514 may be non-foamed or foamed.
When the synthetic resin layer 514 is a foamed resin, the expansion ratio is not particularly limited, but is preferably 1.5 to 2 times. If the expansion ratio is too low, cushioning cannot be imparted to the staircase flooring 1 substantially. On the other hand, if the expansion ratio is too high, the durability of the staircase flooring 1 is reduced and used for a long time. There is a risk that the shoe sole may be damaged in the middle.
The thickness of the synthetic resin layer 514 is not particularly limited, but is usually 0.5 mm to 5 mm.

The second reinforcing layer 512 is provided on the entire synthetic resin layer 514. Therefore, the second reinforcing layer 512 is provided from the rear end of the tread surface laying portion 2 to the lower end of the kicking surface laying portion 3.
The material for forming the second reinforcing layer 512 is not particularly limited as long as it contains fibers, and examples thereof include non-woven fabric (including felt), woven fabric, glass mat, paper, and the like, and preferably the first reinforcing layer. A material different from 511 is used, and a substrate made of glass fibers such as glass woven fabric, glass nonwoven fabric, and glass mat is more preferable. By configuring the second reinforcing layer 512 from glass fiber, it is possible to configure the staircase flooring 1 having excellent dimensional stability. In particular, the residual dent value can be remarkably improved by using a glass woven fabric.

  The thickness of the second reinforcing layer 512 is not particularly limited, but is usually 0.02 mm to 0.5 mm, preferably 0.1 mm to 0.3 mm. If the thickness of the second reinforcing layer 512 is too thick, there may be a problem that the fibers constituting the second reinforcing layer 512 are visually recognized on the floor material surface or that the fibers are easily separated between the fiber layers. On the other hand, if the thickness of the second reinforcing layer 512 is too thin, not only a sufficient reinforcing effect cannot be obtained, but it may be cut during manufacture.

The first reinforcing layer 511 is not provided on the entire staircase flooring 1, and is provided only for the peripheral region including the bent portion 4.
That is, the first reinforcing layer 511 is provided corresponding to a partial region of the tread surface laying portion 2 connected to the bent portion 4 and a partial region of the kick-up surface laid portion 3 connected to the bent portion 4, or the whole. The first reinforcing layer 511 is not provided in the area of the tread laying portion 2 other than the partial area.

As shown in the drawing, the first reinforcing layer 511 is preferably provided on the entire kick-up surface laying portion 3, but even if it is provided in a partial region of the kick-up surface laying portion 3 that is connected to the bent portion 4. Good. For example, the first reinforcing layer 511 may be provided in the upper region of the kick-up surface laying portion 3, and the first reinforcing layer 511 may not be provided in the lower region of the kick-up surface laying portion 3.
Hereinafter, a partial region of the tread laying portion 2 provided with the first reinforcing layer 511 and a partial region or the whole of the kicking surface laying portion 3 connected to the bent portion 4 may be referred to as a “bending portion peripheral region”. The region of the tread laying portion where the first reinforcing layer 511 is not provided may be referred to as a “remaining region”.

Since the synthetic resin layer 514 in the bent portion peripheral region is reinforced by the first reinforcing layer 511 and the second reinforcing layer 512, the synthetic resin layer in the remaining region reinforced only by the second reinforcing layer 512. Compared to 514, it excels in bending strength and tensile strength.
The region around the bent portion of the staircase flooring 1 is laid around the stair nosing portion 14. The periphery of the nose portion 14 is subject to the greatest impact and load when a pedestrian moves up and down the stairs, but the bending portion peripheral region has excellent bending strength and tensile strength due to the presence of the first reinforcing layer 511. Therefore, it has a relatively high rigidity, and is not easily damaged even after long-term use. Furthermore, since the area around the bent portion has high rigidity, when the staircase flooring 1 is constructed while the raised surface laying portion 3 is hooked on the raised surface 13 of the staircase, the bent portion peripheral area is deformed. The positional deviation of the flooring 1 is unlikely to occur.

  On the other hand, the remaining region of the staircase flooring 1 is laid on the tread surface 12 of the staircase, and further laid on the upper kick-up surface 13 by being bent at the corner 15. Although unevenness exists on the tread 12 and the like, the remaining region has lower bending strength and tensile strength than the peripheral region of the bent portion, and therefore can be appropriately stretched or folded relatively easily at a substantially right angle. Therefore, it can be laid while absorbing unevenness, and can be laid along the corner.

  As shown in FIG. 3, the length L2 of the first reinforcing layer 511 in a partial region of the tread laying portion 2 is 3 cm to 15 cm, preferably 5 cm to 15 cm, more preferably 5 cm to 12 cm. It is. If the length L2 of the first reinforcing layer 511 is too short, it is not meaningful to provide the first reinforcing layer 511. On the other hand, if the length L2 is too long, the area of the remaining region becomes relatively small, and it is difficult to step on the construction. There is a risk that the surface uneven absorption effect may not be sufficiently obtained.

  In addition, the length H3 of the first reinforcing layer 511 in the kick-up surface laying portion 3 is 3 cm or more, preferably 5 cm or more. If the length H3 of the first reinforcing layer 511 is too short, the significance of providing the first reinforcing layer 511 is lost. On the other hand, the upper limit of the length H3 of the first reinforcing layer 511 is the lower end of the kick-up surface laying portion 3. The upper limit is a case where the first reinforcing layer 511 is provided up to the lower end of the kick-up surface laying portion 3.

  The first reinforcing layer 511 may be embedded in the synthetic resin layer 514, but is preferably fixed to the back surface of the synthetic resin layer 514 as illustrated. By providing the first reinforcing layer 511 on the back surface of the synthetic resin layer 514, the synthetic resin layer 514 is sandwiched between the first reinforcing layer 511 and the second reinforcing layer 512 in the peripheral region of the bent portion. Since the synthetic resin layer 514 sandwiched between the two reinforcing layers 511 and 512 has high bending strength and tensile strength, shrinkage due to temperature change is extremely difficult to occur.

The material for forming the first reinforcing layer 511 is not particularly limited as long as it contains fibers, and examples thereof include nonwoven fabrics (including felts), woven fabrics, glass mats, and papers, and preferably nonwoven fabrics, glass mats, or the like. A woven fabric, more preferably a non-woven fabric.
By using a non-woven fabric as the first reinforcing layer 511 and using a substrate made of glass fibers such as a glass mat as the second reinforcing layer 512, the bending strength and the tensile strength can be improved.

Examples of the nonwoven fabric include a spunbond nonwoven fabric, a thermal bond nonwoven fabric, a chemical bond nonwoven fabric, a needle punch nonwoven fabric, and a spunlace nonwoven fabric made of polyester fiber. These can be used alone or in combination of two or more. Among these, it is preferable to use a spunbond nonwoven fabric. A spunbond nonwoven fabric is a nonwoven fabric with gaps in which long fibers are overlapped and fixed by thermal bonding or the like.
In particular, the second reinforcing layer 512 is made of a base material made of glass fiber, and the first reinforcing layer 511 is made of a spunbond nonwoven fabric containing polyester fiber, so that the glass fiber base material has an overall dimensional stability. The floor material 1 can be prevented from warping due to the balance between warping of the synthetic resin layer 514 laminated thereon and warping due to the shrinkage force of the polyester fiber nonwoven fabric. For this reason, the shape of the area around the bent portion of the staircase flooring 1 can be maintained.
Moreover, although the fiber of a nonwoven fabric may be either a short fiber or a long fiber, a long fiber is preferable from a viewpoint of tensile strength. The length of the long fiber is, for example, 100 mm or more.

  The nonwoven fabric may be one in which the fibers are intertwined randomly, or may be one in which the fibers are bonded with a certain degree of regularity. Examples of the non-woven fabric in which the fibers are bonded with a certain degree of regularity include, for example, a first layer of a plurality of long fibers arranged substantially in one direction and a second layer of a plurality of long fibers arranged in a direction orthogonal to the one direction. Examples include a nonwoven fabric in which layers are alternately stacked on top and bottom and the intersections of the fibers of the first layer and the second layer are combined. Since it is easy to expose a part of the fibers, it is preferable to use a nonwoven fabric in which the fibers are bonded with a certain degree of regularity as the first reinforcing layer 511.

Although the thickness of the nonwoven fabric used as the 1st reinforcement layer 511 is not specifically limited, Preferably it is 0.1 mm-0.5 mm, More preferably, it is 0.2 mm-0.4 mm, More preferably, it is 0.25 mm. ~ 0.35 mm. Also, the basis weight of the nonwoven fabric is not particularly limited, preferably ^{20g / m 2 ~100g / m 2} , more preferably from ^{30g / m 2 ~50g / m 2} . If the nonwoven fabric used as the first reinforcing layer 511 is too thin, the bending strength and the tensile strength cannot be improved sufficiently. On the other hand, if it is too thick, the synthetic resin layer 514 becomes relatively thin and the synthetic resin layer 514 The resin may not be sufficiently impregnated.

  In addition, the back surface of the first reinforcing layer 511 preferably has a portion where a part of the fibers of the first reinforcing layer 511 is exposed. By having a portion where a part of the fiber is exposed in this manner, there are irregularities on the back surface of the first reinforcing layer 511. And since the adhesive agent used when constructing the staircase flooring 1 enters the irregularities of the first reinforcing layer 511 and adheres to the exposed fiber, the staircase around the bent portion of the staircase flooring 1 is staircased. Can be fixed firmly.

  When a non-woven fabric is used as the first reinforcing layer 511, the resin constituting the synthetic resin layer 514 is impregnated from the surface of the non-woven fabric, and the non-woven fabric and the synthetic resin layer 514 can be integrated. By preventing the impregnation, a portion where a part of the fiber is exposed on the back surface of the first reinforcing layer 511 can be formed.

  The staircase flooring 1 used in the staircase structure of the present invention is preferably provided with the first reinforcing layer 511 and the second reinforcing layer 512, but is not limited thereto, and the staircase flooring is not limited thereto. The material 1 may be provided with only one of the first reinforcing layer 511 and the second reinforcing layer 512, or at least of the first reinforcing layer 511 and the second reinforcing layer 512. Any one of the reinforcing layers and a different reinforcing layer may be provided.

Next, the second forming layer 52 is made of a synthetic resin molded product. The second forming layer 52 may be formed of a flexible synthetic resin similarly to the synthetic resin layer 514, or may be formed of a synthetic resin harder than the synthetic resin layer 514.
The thermoplastic resin forming the second forming layer 52 includes vinyl chloride resin; olefin resin; vinyl acetate resin such as ethylene-vinyl acetate copolymer; acrylic resin such as ethylene-methacrylate resin; amide resin Ester resins; urethane resins; olefin elastomers, styrene elastomers, urethane elastomers and other elastomers; rubbers and the like.

The second forming layer 52 may be non-foamed or foamed.
The tread laying portion side of the area around the bent portion of the staircase flooring 1 is a portion that prevents the pedestrian's sole from slipping off the stairs. Therefore, in order to impart grip properties to this portion, it is preferable that the second forming layer 52 is a foamed resin. The expansion ratio is not particularly limited, but is preferably 2 to 3 times. If the expansion ratio is out of this range, the second forming layer 52 may not be provided with sufficient grip.

The second formation layer 52 is formed on the surface of the first formation layer 51 corresponding to the front end portion of the tread surface laying portion 2 and the upper end portion of the kicking surface laying portion 3 from the bent portion 4 of the staircase flooring 1. The resin composition etc. which form the layer 52 are laminated | stacked, and it is firmly integrated with the 1st formation layer 51 by heating and solidifying.
Furthermore, on the surface of the second forming layer 52, a plurality of wide protrusions 61 arranged in parallel at a predetermined interval in the width direction, and a plurality of point-like protrusions arranged in parallel at a predetermined interval in the width direction. 62 project. Further, a low long protrusion 63 extending in the width direction protrudes behind the wide protrusion 61.

A double-sided adhesive tape 7 is provided on the back surface of the kick-up surface laying portion 3. In addition, 71 shows the release paper temporarily stuck on the opposite surface to the sticking surface of the kicking surface laying part 3. FIG.
The double-sided adhesive tape 7 has a predetermined length in the vertical direction, and is affixed to the back surface of the kick-up surface laying portion 3 over the entire width direction of the kick-up surface laying portion 3. The lower end of the double-sided pressure-sensitive adhesive tape 7 substantially coincides with the lower end of the kick-up surface laying portion 3. When the length from the upper end 7a of the double-sided adhesive tape 7 to the lower end of the kicking surface laying portion 3 is X and the length from the back surface of the treading surface laying portion 2 to the lower end of the kicking surface laying portion 3 is Y, It sticks so that it may become X = Y / 2-4 * Y / 5.
The specific length in the vertical direction of the double-sided pressure-sensitive adhesive tape 7 is 20 mm to 32 mm, preferably 20 mm to 25 mm, when Y is 40 mm.

Since the double-sided pressure-sensitive adhesive tape 7 is applied so that X = Y / 2 to 4 × Y / 5 as described above, the initial adhesion of the kick-up surface laying portion 3 to the kick-up surface 13 can be stabilized, and further bending Since the volume of the gap between the part 4 and the stair nosing part 14 can be reduced, the flow of the adhesive filled in the gap can be effectively prevented.
The lower end of the double-sided pressure-sensitive adhesive tape 7 may be positioned slightly above the lower end of the kick-up surface laying portion 3. As described above, since the caulking seal portion 91 is provided at the lower end of the kick-up surface laying portion 3 when the floor material 1 for stairs is constructed on the stairs, the lower end of the double-sided adhesive tape 7 and the lower end of the kick-up surface laying portion 3 Even if there is a gap between them, the gap is filled by the caulking seal portion 91.

The double-sided pressure-sensitive adhesive tape 7 is made of a belt-like base material having a pressure-sensitive adhesive applied on both sides.
It does not specifically limit as a base material, A foamed resin sheet, a nonwoven fabric, a woven fabric, paper, a synthetic paper, a synthetic resin sheet etc. are mentioned.
If the base material has a certain elasticity or more, the base material is easily adapted to the kick-up surface 13, and therefore, the base material is preferably a foamed resin sheet or a non-woven fabric, and more preferably a foamed resin sheet.

The material of the foamed resin sheet is not particularly limited, and examples thereof include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polystyrene, polyurethane, and a mixture thereof. It is preferable that a foamed resin sheet containing a mixed polymer of polyethylene and ethylene-vinyl acetate copolymer is used because it is relatively difficult to break between layers and is excellent in strength.
If the double-sided pressure-sensitive adhesive tape 7, which is a foamed resin sheet containing a mixed polymer of polyethylene and ethylene-vinyl acetate copolymer, is used as the base material, the double-sided pressure-sensitive adhesive tape 7 when the kick-up surface laying portion 3 is attached to the kick-up surface 13. Does not break between the layers, the kicking surface laying portion 3 can be securely bonded to the kicking surface 13.

The tensile strength of the base material is, for example, 30 to 60 N / 25 mm in the vertical direction, and preferably 50 to 60 N / 25 mm. The tensile strength is measured according to JIS K 7161.
Although the thickness of a base material is not specifically limited, When a base material is a foamed resin sheet, the thickness is 1 mm or more, Preferably it is 2 mm or more. If the foamed resin sheet is too thin, the unevenness of the kick-up surface 13 cannot be absorbed, and there is a possibility that the back surface of the double-sided pressure-sensitive adhesive tape 7 and a part of the kick-up surface 13 may float. The thickness of the foamed resin sheet is 5 mm or less, preferably 4 mm or less. If the foamed resin sheet is too thick, the foamed resin sheet itself is deformed in the vertical direction, and the initial adhesion position of the kick-up surface laying portion 3 may be shifted.

As the pressure-sensitive adhesive for the double-sided pressure-sensitive adhesive tape 7, a pressure-sensitive pressure-sensitive adhesive is usually used. The pressure-sensitive adhesive is not particularly limited, and examples thereof include an acrylic adhesive, a rubber adhesive, a silicone adhesive, a urethane adhesive, and a fluorine adhesive. The property of the pressure-sensitive adhesive is not particularly limited, and examples thereof include an emulsion-type pressure-sensitive adhesive, a solvent-type pressure-sensitive adhesive, and a hot-melt type pressure-sensitive adhesive.
Although the thickness of the apply | coated adhesive is not specifically limited, Usually, it is about 10 micrometers-about 200 micrometers.

  The peel strength of the double-sided pressure-sensitive adhesive tape 7 is preferably 40 to 50 N / 22 mm. By using the double-sided pressure-sensitive adhesive tape 7 having such a peel strength, it is possible to prevent the kick-up surface laying portion 3 from being lifted during initial bonding, and to firmly bond the kick-up surface laying portion 3 to the kick-up surface 13.

However, the peel strength can be measured according to JIS A 5536.
Specifically, a double-sided pressure-sensitive adhesive tape having a 2.2 mm-thick foamed resin sheet as a base material is cut into a width of 22 mm, and one side of this double-sided pressure-sensitive adhesive tape is attached to the following adherend surface, and a load of 10 g / 100 mm ² And left for 24 hours. Then, it is a value measured by attaching to a tensile tester, peeling at 90 degrees, and pulling speed of 200 mm / min.
The surface to be adhered is a smooth surface of the cut piece obtained by cutting off a raised surface laying portion of a floor material for a staircase (polyvinyl chloride sheet; trade name “Tori NS Step 800” manufactured by Toli Corporation).

<Adhesive>
The adhesive used at the time of laying the staircase flooring 1 has a viscosity measured under the above conditions exceeding 100,000 mPa · s, and preferably the viscosity is 110,000 mPa · s or more. However, if the viscosity is too high, the adhesive may not be applied. Therefore, the viscosity of the adhesive used is preferably 200,000 mPa · s or less, more preferably 180,000 mPa · s or less. .

The type of the adhesive is not particularly limited as long as it has such a viscosity. For example, a two-component type epoxy resin-based adhesive, a two-component type, or a one-component type urethane-based adhesive can be used. . Among them, a curing agent or an adhesive that is cured by moisture in the air is preferable, and an adhesive that is cured by moisture in the air is particularly preferable.
As an adhesive which hardens | cures with the water | moisture content in air, the urethane type adhesive agent containing an isocyanate group containing urethane prepolymer, a filler, and an organic solvent is mentioned, for example.

The isocyanate group-containing urethane prepolymer is cured when the isocyanate group reacts with moisture in the air to form a urea bond and crosslink.
The isocyanate group-containing urethane prepolymer is obtained by reacting an organic polyisocyanate and an active hydrogen-containing compound with active hydrogen under an excess of isocyanate groups.
Examples of the organic polyisocyanate include aromatic diisocyanates such as phenylene diisocyanate, aliphatic diisocyanates such as hexamethylene diisocyanate, alicyclic diisocyanates such as cyclohexane diisocyanate, and modified products thereof. These may be used alone or in combination of two or more. Of these, aromatic diisocyanates are preferred because of excellent adhesion after curing and water resistance.
Examples of the active hydrogen-containing compound include a polymer polyol and a polymer polyamine.

  Moreover, a conventionally well-known thing can be used for the said filler. Examples of the filler include inorganic powder fillers such as calcium carbonate, clay, silica, mica, zeolite, graphite, diatomaceous earth, talc, aluminum powder, zinc powder, magnesium carbonate; rubber powder, thermoplastic or thermosetting resin And organic fillers such as powders of polyethylene and the like. These may be used alone or in combination of two or more. In particular, by blending at least one selected from finely divided silica, organic surface-treated calcium carbonate and clay, thixotropic properties can be imparted to the adhesive, and an adhesive that is highly viscous and difficult to flow can be obtained.

  Although the compounding quantity of a filler is not specifically limited, In order to obtain the highly viscous adhesive like this invention, the said filler is 100-180 mass parts with respect to 100 mass parts of isocyanate group containing urethane prepolymers. It is preferably included. If the blending amount of the filler is too small, the effect of reinforcing and increasing the adhesive cannot be obtained sufficiently, and the viscosity of the adhesive may not be sufficiently increased. On the other hand, if the amount of the filler is too large, the viscosity of the adhesive increases so that it may not be applied, and the adhesive layer 8 after curing of the adhesive becomes brittle.

  Examples of the organic solvent include aliphatic solvents such as n-hexane, aromatic solvents such as toluene, alicyclic hydrocarbon solvents such as cyclopentane, petroleum fraction solvents such as naphthenes, and ethyl acetate. Examples thereof include acetate solvents, carbonate solvents such as dimethyl carbonate, and ketone solvents such as acetone. These may be used alone or in combination of two or more. The viscosity of the adhesive can be adjusted by appropriately setting the blending amount of the organic solvent. In order to obtain a highly viscous adhesive as in the present invention, the organic solvent is preferably contained in an amount of 55 to 120% by mass.

The adhesive may contain an additive. Examples of the additive include a curing accelerating catalyst, a plasticizer, an adhesion imparting agent, a weather resistance imparting agent, a storage stability improving agent, and a colorant.
The curing accelerating catalyst is added to accelerate the reaction between the isocyanate group of the isocyanate group-containing urethane prepolymer and moisture. Examples of the curing accelerator include metal alkoxides such as tetra-n-butyl titanate, organic acid metal salts such as tin octenoate, metal chelate compounds such as zirconium tetrakis (acetylacetonate), and tertiary compounds such as N-ethylmorpholine. Examples include amines. It is preferable that 0-10 mass parts of hardening acceleration catalysts are mix | blended with respect to 100 mass parts of isocyanate group containing urethane prepolymers.

Examples of the plasticizer include aliphatic carboxylic acid esters such as dioctyl phthalate, alcohol esters such as pentaerythritol ester, and polyethers.
The adhesiveness imparting agent is added to improve the adhesiveness of the adhesive. Examples of the adhesion-imparting agent include a coupling agent, an epoxy resin, a phenol resin, an alkyl titanate, and an organic polyisocyanate.

The TI value of the adhesive is not particularly limited, but is preferably 1.5 to 8.0, more preferably 2.0 to 7.0, and still more preferably 2.0 to 6.0. .
The TI value is the ratio of the viscosity under low shear force to the viscosity under high shear force. If the TI value is high, the viscosity under a high shearing force is lowered, and the applicability of the adhesive is improved. In addition, in the state after application of the adhesive, the viscosity under a low shear force is relatively high, so the fluidity after application of the adhesive is low, and the adhesive does not easily drip after application of the adhesive. On the other hand, if the TI value is low, the viscosity under a high shearing force is relatively high, so that it is difficult to apply the adhesive. Further, in the state after application of the adhesive, since the viscosity under a low shear force is relatively low, the fluidity after application of the adhesive is high, and the adhesive tends to sag after application of the adhesive.

  For this reason, in the adhesive of the present invention having a viscosity of 100,000 mPa · s or more, if the TI value is too low, it is difficult for the adhesive to come out from the comb when applied with a comb iron, resulting in poor workability. . On the other hand, if the TI value is too high, the fluidity at the time of application of the adhesive becomes too high, and the effects of the present invention cannot be fully exerted. It may become. If the thickness of the adhesive on the kick-up surface is non-uniform, the staircase floor material is likely to be partially peeled off. In addition, when the adhesive is applied to the kick-up surface with a comb iron, the adhesive applied to the ridge may be flattened. The adhesive of the present invention having a TI value in the above-described range can be applied under conditions that are most easily applied while having the effects of the present invention.

The adhesive strength of the adhesive is preferably 30 N / 25 mm or more, and more preferably 50 N / 25 mm or more.
The adhesive strength can be measured according to the following measuring method.

  The adhesive is stored in a metal can, a flexible bag formed of a metal foil laminated film such as aluminum or a metal-deposited film in a sealed bag shape, etc., and provided to a construction site. By encapsulating the adhesive in the flexible bag, it is possible to easily dispense the adhesive and to dispense almost the entire amount of the encapsulated adhesive. In addition, when an adhesive agent is a two liquid type, each liquid is enclosed separately. Since the adhesive of the present invention has a high viscosity, when the adhesive is enclosed in the flexible bag, the adhesive can be easily poured out while applying pressure as compared with a case where the adhesive is taken out from a can or a resin container.

Here, a specific adhesive is illustrated and its physical property evaluation is shown in Table 1.
The composition and physical property evaluation of each adhesive are as follows.

[Adhesive composition]
For adhesives 1-1 to 1-6, 2-4, and 2-5, the amount of urethane prepolymer of the adhesive (manufactured by Toli Co., Ltd., trade name “cement for Tori step”), type and amount of filler The amount of the ester solvent was changed as follows, and the viscosity as shown in Table 1 was prepared. For the adhesives 2-1 to 2-3, the following commercially available adhesives were used.

(Adhesive 1-1)
100 parts by weight of urethane prepolymer, 130 parts by weight of filler (calcium carbonate), 70 parts by weight of ester solvent.
(Adhesive 1-2)
100 parts by weight of urethane prepolymer, 135 parts by weight of filler (clay), 100 parts by weight of ester solvent.
(Adhesive 1-3)
100 parts by weight of urethane prepolymer, 135 parts by weight of filler (calcium carbonate), 85 parts by weight of ester solvent.
(Adhesive 1-4)
100 parts by weight of urethane prepolymer, 180 parts by weight of filler (clay), 120 parts by weight of ester solvent.
(Adhesive 1-5)
100 parts by weight of urethane prepolymer, 160 parts by weight of filler (clay), 140 parts by weight of ester solvent.
(Adhesive 1-6)
100 parts by weight of urethane prepolymer, 125 parts by weight of filler (calcium carbonate), 80 parts by weight of ester solvent.

(Adhesive 2-1)
Product name “US Cement” manufactured by Toli Corporation. 100 parts by mass of a urethane prepolymer, 100 to 180 parts by mass of an inorganic filler, and 55 to 120 parts by mass of an ester solvent.
(Adhesive 2-2)
Product name “US200” manufactured by Toli Corporation. 20-30% by mass of urethane prepolymer, 130-250 parts by weight of inorganic filler, 80-150 parts by weight of ester solvent.
(Adhesive 2-3)
Product name “Takiron 607” manufactured by Takiron Co., Ltd.
(Adhesive 2-4)
100 parts by weight of urethane prepolymer, 200 parts by weight of filler (calcium carbonate), 100 parts by weight of ester solvent.
(Adhesive 2-5)
100 parts by weight of urethane prepolymer, 225 parts by weight of filler (clay), 150 parts by weight of ester solvent.

  About the said adhesive agent 1-1 to 1-6 and 2-1 to 2-5, the viscosity etc. were measured or evaluated by the following method.

[Measurement method of viscosity]
The viscosity of the adhesive was measured according to JIS K 6833, and the BH viscometer and rotor No. 7 and measured at 23 ° C. and 10 rpm.

[Evaluation method of sagging property and evaluation method of workability]
The evaluation of sagging property and workability was performed as follows.
At room temperature, a staircase flooring (trade name “Tori NS Step 800”, manufactured by Toli Corporation) was applied to a concrete staircase using a test adhesive according to the construction method of a staircase floor described below. . The degree of adhesive dripping and the feel of workability during the construction were evaluated according to the following criteria.
However, the sagging property of the adhesive is an important characteristic in the present invention, and in particular, the sagging property of the adhesive at the nose portion is important. Therefore, the sagging property of the adhesive is evaluated separately for each of the raised surface and the nose portion. did.

(Evaluation criteria for sagging property of kicked surface)
A1: The adhesive does not sag and does not sag from the vertical surface, which is a vertical surface.
A2: Although dripping occurs when the adhesive is applied thickly, there is no problem in use. In addition, the thickness of the adhesive on the kick-up surface is slightly uneven, but there is no problem.
A3: Even if the adhesive is applied with a normal thickness, dripping occurs. The thickness of the adhesive on the kicked surface becomes uneven.
A4: Adhesive droops a lot and cannot be used for bonding floor materials for stairs.

(Nodular drooping)
B1: There is no dripping of the adhesive and almost no gap is generated in the nose.
B2: Dripping occurs when the adhesive is applied thick, but there is no problem in use. There is a slight gap in the nose, but there is no problem with durability.
B3: Even if the adhesive is applied with a normal thickness, dripping occurs. A large cavity is formed in the nose, and there is a problem in durability.
B4: Adhesive droops a lot and cannot be used for bonding floor materials for stairs.

(Evaluation criteria for workability)
C1: The adhesive can be spread and applied to the kick-up surface easily and can be installed very easily.
C2: Although it is difficult to either spread the adhesive or apply it to the raised surface, construction is possible.
C3: Construction is difficult because it is difficult to spread the adhesive and apply to the kicked surface.

[Measurement method of adhesive strength]
A test floor sheet (vinyl chloride floor sheet; Tori Co., Ltd., trade name “Tori NS Step 800”) is bonded to the surface of the flexible plate through the test adhesive and cured for 7 days. The strength (N / 25 mm) when the sheet was peeled in the 90 degree direction was measured. The specific measurement method for the 90-degree peeling was performed according to the peel adhesion strength of JIS A 5536 (2007).

[Measurement method of TI value]
The TI value is a thixo index and is a ratio of apparent viscosities at two different shear rates (rotational speeds).
The TI value was measured in accordance with JIS K5400, and the value was substituted into the following formula and unified to 2 significant figures.
Formula: TI = η1 / η2
The η1 is a BH viscometer and a rotor No. according to JIS K 6833. 7 is a viscosity (mPa · s) at 2 rpm measured at 23 ° C., and η2 is a viscosity (mPa · s) at 20 rpm.

<Construction method for flooring for stairs>
The construction method of the floor material for stairs of this invention can be implemented to a stairs using the said floor material 1 for stairs and an adhesive agent, for example.
Clean the stairs and make sure the substrate is dry.
Measure the width and height of the bottom kick-up surface. The rear area of the tread laying portion 2 of the staircase floor material 1 is cut according to the dimensions. The adhesive is applied to the lowermost kick-up surface. Then, after taking an open time of about 10 to 30 minutes, the cut tread surface laying portion 2 is pasted so as not to protrude from the upper end of the kick-up surface, and the entire surface is adhered using a hand roller or the like. Press.
In this way, the construction on the bottom kick-up surface is completed.

Next, the tread surface laying portion 2 of the stair floor material 1 is temporarily placed on the first step tread surface in a state in which the kick surface laying portion 3 of the stair floor material 1 is abutted against the lowermost kick surface. To do.
A writing instrument is run along both sides of the tread laying portion 2 of the temporarily placed staircase floor 1, and a mark line is drawn on the tread surface of the staircase and the upper kick-up surface. In addition, when laying the floor material 1 for stairs over the whole width of the tread of the stairs, it is not necessary to draw the mark line.

The adhesive is applied to the tread surface and the kick-up surface in the region surrounded by the mark line. The application amount of the adhesive is usually about 350 to 450 g / m ² . Moreover, application | coating of the adhesive agent to these surfaces can be performed, for example using a comb eye iron (conforming to JIS A 5536).

  The form (pattern) when applying the adhesive is not particularly limited. The form may be any form such as a bead shape, a spiral shape, a foam shape, or a dot shape, but generally a bead shape is suitably used for construction of stairs.

On the other hand, as shown in FIG. 5A, the release paper 71 of the double-sided pressure-sensitive adhesive tape 7 provided on the raised surface laying portion 3 of the staircase material 1 is peeled off.
Next, as shown in FIG. 5B, an adhesive 81 is applied to the back surface side of the bent portion 4 of the staircase flooring 1. As shown in the figure, when a caulking gun is used as the applicator, the adhesive 81 is applied in a beat shape having a diameter of about 6 to 7 mm.
Note that an adhesive may be applied to the stair nosing portion of the staircase instead of or in combination with applying the adhesive to the bent portion 4 of the staircase flooring 1.

  After applying the adhesive, take an open time of about 10 to 30 minutes, align the bent part 4 of the floor material 1 for the staircase so that it touches the nose part of the staircase, and double-sided adhesive tape 7 for the kicking surface laying part 3 The tread surface laying portion 2 is adhered to the tread surface while adhering to the kick surface. Subsequently, the rear region of the tread surface laying portion 2 is brought into contact with the upper kick-up surface and bonded. At this time, using a corner roller or the like, the tread surface laying portion 2 is bent at a substantially right angle in accordance with the entering corner portion of the stairs, and the middle portion of the kicking surface laying portion 3 is placed in the entering corner portion. When the rear end portion of the tread laying portion protrudes from the upper kick-up surface, it is cut off. Thereafter, the surface is pressed using a hand roller or the like.

When two or more staircase floors 1 are laid side by side in the width direction of the one-step kick-up surface and tread surface, a V-shaped groove is formed at the abutting portion of two adjacent staircase floor materials 1 After each side end portion of the two staircase flooring materials 1 is cut obliquely, the same is applied through an adhesive. Thereafter, a caulking seal or welding is performed on the groove to perform a seam treatment.
In addition, when the floor material 1 for a staircase having a length that allows the tread surface laying portion 2 to be laid only on the tread surface 12 of the staircase is used, the tread surface laying portion 2 can be folded at the corner 15. Absent.

Thereafter, in the same manner, the staircase flooring 1 is pasted on the tread surface and the kick-up surface of the second and higher steps. Finally, the coking seal | sticker part 91 is formed by filling the lower end part of the kick-up surface laying part 3 of each floor material 1 for stairs with a caulk seal. If necessary, caulking sealing is also performed on both sides of each stair flooring 1.
By curing until the adhesive is cured, a staircase structure 11 in which the staircase flooring 1 is laid on the staircase with the double-sided adhesive tape 7 and the adhesive layer 8 as shown in FIG. 1 is obtained.

According to the construction method of the staircase floor material, since the adhesive having a relatively high viscosity is used, the adhesive in the gap between the bent portion 4 of the staircase floor material 1 and the stair nosing portion 14 hardly flows downward. . Further, although the step surface of the staircase has a normal gradient, it is possible to prevent the adhesive from flowing in accordance with the gradient during the open time after the adhesive is applied to the step surface.
Moreover, the length X from the upper end of the double-sided adhesive tape 7 to the lower end of the kicking surface laying portion 3 exceeds 1/2 times the length Y from the back surface of the treading surface laying portion 2 to the lower end of the kicking surface laying portion 3. Since it is set to 4/5 times or less, the wide part of a kick-up surface laying part can be adhere | attached through a double-sided adhesive tape. The adhesive exhibits a strong adhesive force after curing, but it is not sufficient in the initial stage of adhesion. In this respect, by adhering the kick-up surface laying portion 3 via the double-sided adhesive tape 7, the initial adhesion of the kick-up surface laying portion 3 to the kick-up surface 13 can be stabilized and the displacement can be prevented. Furthermore, when the double-sided pressure-sensitive adhesive tape 7 is used, the volume of the gap between the bent portion 4 of the staircase flooring 1 and the stair nosing portion is reduced, so that the flow of the adhesive existing in the gap can be effectively prevented.

Therefore, according to the construction method of the staircase floor material of the present invention, the staircase floor material 1 and the staircase foundation are in good contact with each other through the adhesive layer 8 and the double-sided adhesive tape 7, and the staircase floor material 1 and the staircase It is difficult to generate a cavity, which is a portion that does not have the adhesive layer 8 between the bases.
Since the staircase structure of the present invention does not substantially have a cavity between the staircase flooring 1 and the staircase foundation, a part of the staircase flooring may be lifted or walked during long-term use. There is no possibility that a part of the staircase floor material corresponding to the hollow portion will be damaged by the load of the person.
In addition, the construction method of the floor material for stairs of this invention does not require a special tool, and can construct the floor material 1 for stairs to a stair easily.

  The staircase structure of the present invention can be used for various structures such as ordinary houses, apartment houses, condominiums, commercial facilities, educational facilities, medical welfare facilities, and office buildings.

  DESCRIPTION OF SYMBOLS 1 ... Floor material for stairs, 2 ... Tread surface laying part, 3 ... Kick-up surface laying part, 4 ... Bending part, 7 ... Double-stick tape, 8 ... Adhesive layer, 11 ... Stair, 12 ... Stair tread, 13 ... Kick-up surface of stairs, 14 ... Nosing part of stairs

Claims (4)

A staircase in which the tread surface and the kicking surface are constructed substantially orthogonally at the nose,
A staircase floor in which a tread surface laying portion laid on the tread surface of the staircase and a kicking surface laying portion laid on at least an upper part of the kicking surface of the stairs are connected in a substantially L shape via a bent portion And having
A part of the raised surface laying part of the floor material for stairs is bonded to the stairs via a double-sided adhesive tape,
The length X from the upper end of the double-sided pressure-sensitive adhesive tape to the lower end of the raised surface laying portion is 1/2 times to 4/5 times the length Y from the back surface of the tread surface laying portion to the lower end of the raised surface laying portion. And
A portion of the floor material for the staircase other than the portion adhered by the double-sided pressure-sensitive adhesive tape is adhered to the staircase through the adhesive layer, and the adhesive layer is bonded to the BH viscometer and the rotor No. 7 is a cured layer of an adhesive having a viscosity measured at 23 ° C. and 10 rpm with a viscosity exceeding 100,000 mPa · s. The double-sided pressure-sensitive adhesive tape has a base material, and an adhesive provided on both surfaces of the base material,
The staircase structure according to claim 1, wherein the base material is a foamed resin sheet containing polyethylene and ethylene vinyl acetate and having a foaming ratio of 5 times or more and a thickness of 1 mm or more.   The staircase structure according to claim 1 or 2, wherein a length from a lower end to an upper end of the double-sided pressure-sensitive adhesive tape is 20 mm to 35 mm. A floor material for a staircase in which a tread surface laying portion laid on a tread surface of a staircase and a kicking surface laying portion laid on at least an upper portion of a staircase raising surface are connected in a substantially L shape via a bent portion. When constructing on stairs,
The length X from the lower end of the kick-up surface laying portion to the upper end of the double-sided adhesive tape is a length from the lower end of the kick-up surface laying portion to the back surface of the tread laying portion. Adhering to the stairs via double-sided adhesive tape that is 1/2 times to 4/5 times the length Y,
A part of the floor material for staircases other than the part adhered by the double-sided adhesive tape is attached to a BH viscometer and a rotor No. The construction method of the flooring material for stairs which adhere | attaches on a stairs using the adhesive agent whose value measured on condition of 23 degreeC and 10 rpm using 7 exceeds 100,000 mPa * s.

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