JP2001303736A - Tread for stair and stair using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in a pre-cut stair prepared by executing the cutting work to a side plate and a tread in advance in a factory, that the tread is expanded by the moisture and humidity around the tread, shrunk by drying, distorted or deformed during a time after the cutting work in the factory to the execution of works at a job site, which prevents the tread from being mounted with high accuracy. SOLUTION: In this tread for stair composed of a wood base material where a nosing of a tread is rounded, and a safety part is mounted on a lower face of the tread edge part, a vapor proofing process is executed on a rear face of the tread for the stair.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase, and more particularly, to a step nose portion of a tread plate and a lower surface thereof, which are processed so that the stairs can be safely moved up and down. The present invention relates to a step board which is cut or formed so as to be assembled in advance and a stair using the step board.

[0002]

2. Description of the Related Art Conventionally, in order to prevent a foot toe from being caught or tripping on a tread nose, an auxiliary member or a protection member is provided in the tread nose, or the nose is processed into a curved shape when ascending or descending. There are known stairs that take care of safety. For example, JP-A-11-62152 discloses that
A protective member for an integrated stair tread having both functions of preventing the surface of the stair tread from slipping and preventing the toe from being caught in the nose is disclosed. Further, Japanese Patent Application Laid-Open No. H11-172875 discloses a staircase in which an auxiliary member made of a soft material is provided in a nostril portion so as to be gentle on a toe and prevent a toe from being caught in a nostril portion when climbing the stairs. ing.

[0003]

However, the above prior art has the following problems. The protection member disclosed in Japanese Patent Application Laid-Open No. 11-62152, in which a non-slip member and an anti-slipping member are integrated, is attached to a tread by post-processing after assembling the stairs at the site. If you try to attach a safety member with a complicated shape at the site to the tread of the stairs that has already been assembled, as a matter of fact, there is a margin in the cut of each part because of the ease of installation, and when you look at the protection member from the front of the stairs after installation, A gap is generated between the left and right side plates, making the appearance unsightly. If it is attempted to work without such a gap, great care must be taken and the corresponding equipment must be used, resulting in a new drawback that requires a great deal of labor and increases the construction cost. This point is the same in the case of attaching the soft protective member disclosed in Japanese Patent Application Laid-Open No. 11-172875.

[0004] In general, in the field construction, the efficiency of the construction is emphasized above all else. Therefore, in order to easily and safely assemble the stairs, not only the above-mentioned protection member but also the assembling of the tread and the side plate are assembled. There is no choice but to make room for the cut. As a result, when the stairs after assembly are viewed from the front, there is usually a gap between the treads and the side plates, which lowers the quality of the stairs.

In order to avoid this problem, use a high-precision machine tool in a factory or the like where the working environment is stable.
Pre-cutting to be able to assemble into the side plates and treads constituting the stairs in advance (hereinafter referred to as pre-cutting)
Has been done. In a simple configuration of stairs consisting of a tread and a side plate where the nose is just cut off flat,
By this pre-cutting process, in many cases, a tight staircase can be created.

[0006] Treadboards and side plates that have been precut with high precision in a factory or the like often pass a long time from the precut processing to the actual construction due to work or the like. Due to changes in the environment during that time, the treads may expand due to surrounding moisture or moisture, shrink due to drying, deformation such as twisting, etc. Precise mounting was not possible due to rattling at the contact with the side plate. Conventional stairs with simple structures have a way to cope with them.However, from the viewpoint of safe ascending and descending and design, it seems that the stair nosing is processed into a curved surface and protective members and safety members are provided to prevent stumbling. For complicated structures, the part becomes thicker than the main part of the tread, resulting in a large amount of deformation due to moisture absorption and desorption, and does not match the notch cut into the side plate in the same shape, making it virtually impossible to attach become. For this reason, a step board having such a complicated structure which has been precut and a side plate combined with the step board have not been commercialized.

[0007] It is an object of the present invention to provide a tread plate which can be constructed on site even if the tread plate has been processed into a complicated shape in a factory or the like in advance, and a stair using the tread plate.

[0008]

According to the first aspect of the present invention, at least the back surface of a step board for stairs is subjected to a moisture-proof treatment so as to prevent expansion and contraction or twisting of the step board due to temporal changes in temperature and humidity. The shape change is prevented. In the invention according to claim 2, the front surface of the nosing portion of the tread according to claim 1 is
This is a tread plate with a smooth arc formed in advance at a factory, etc., and a stair preventer provided on the lower surface of the stair nosing, which is easy to climb when assembled as a stair, and the toe gets stuck on the stair nosing or stumbles. Or to prevent the According to the third aspect of the present invention, the moistureproof treatment of the stepboard for stairs according to the first or second aspect is performed on the entire back surface of the stepboard by using a polysand sheet, so that the moistureproof treatment can be simplified. According to a fourth aspect of the present invention, there is provided a staircase which is previously provided with a notch which can be assembled as a stair before assembling the stairs and the side plate combined with the treads, and then assembled. Stairs of various shapes can be assembled exactly without gaps.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of a stair tread according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a cross section showing another embodiment of the stair tread of the present invention. FIG.

As shown in FIGS. 1 to 3, the staircase 1 of the present invention has a back surface 2a of a tread body 2 which is subjected to a moisture proofing treatment. The rear surface of the nosing portion 3 having the surface of the nose extends to the back surface of the stumbling prevention portion 4 provided in connection with the nosing portion.

The tread main body 2 is made of a wooden board. Plywood, laminated wood, LVL, medium specific gravity fiber board, OSB,
Conventional wood substrates such as a particle board and solid wood can be used.

The stairs 3 are hatched portions in FIG. 2 or FIG. 3, and are the portions on the front of the tread plate body 2 on which the toes ride when going up and down stairs. The smooth arc provided on the front surface 3a of the nosing portion 3 may be a part of a circle or an ellipse, or any other curved surface having a shape such that a toe, a sock or the like is not easily caught.

[0013] The stumbling prevention unit 4 prevents the stumbling of the toes when climbing the stairs,
In the unlikely event that the tongue is stepped off or slipped, it has a function to guide the toe smoothly from the nostril to the far side of the tread so that the toe does not drop sharply and suddenly, preferably after a certain guidance. It has a hit. The shape is not particularly limited as long as it has this function.
The stumbling prevention portion 4 prevents the toe from being caught on the front surface 4a, and smoothly guides the toe when the nose portion is stepped off or slipped, and the bottom portion 4a.
This is an example of a preferred shape, in which the toe hits at b and it is easy to avoid tripping. The stumbling prevention part is connected in advance to the lower surface of the nostril at a factory or a processing plant (hereinafter abbreviated as a factory), but this processing is integrally formed by cutting from a single plate as shown in FIG. Alternatively, only the stumbling prevention portion may be separately formed and bonded to the lower surface of the nosing portion with an adhesive, or may be incorporated by using an adhesive and a hidden nail, or using an adhesive and a tenon. In any case, it can be finished beautifully without any gaps by processing in a factory or the like.

Processing machines include NC routers and teno-
A known material such as a knurl or a molder may be used. If the laminated material is used as a base material, it is easy to cut out the nose portion and the stumbling prevention portion integrally with a molder in a predetermined shape, and further paint the surface. It can be beautifully finished just by finishing.

The moisture-proof treatment 5 may be provided on the entire surface or on the front and back of the tread, but is preferably provided on the back of the tread in consideration of the design, safety, and cost of the tread, particularly preferably at the stumbling prevention portion. The reason for this is that the stumbling prevention portion is smaller than the tread main body, so that dimensional change and shape deformation due to environmental influences are likely to occur.
In the case where the stumbling prevention portion has a complicated shape as indicated by reference numeral 4 in FIG. 1, deformation is likely to occur particularly near the bottom 4b. If this part is deformed, it is likely that it will not fit into the combination groove cut into the side plate in the same shape.

Examples of the moisture-proof treatment include moisture-proof coating, polysand sheet sticking, and metal sheet sticking such as aluminum foil. Urethane resin paint, amino alkyd resin paint, polyester resin paint or the like for woodwork is applied as a moisture-proof paint at about 50 to 200 g / m ^{2 by} roll coating or flow coating. 4
What is necessary is just to dry at 0-60 degreeC for 30-60 minutes.

Among these, the moisture proofing treatment using a polysand sheet is relatively inexpensive and easily available, and the application of a moisture proof coating requires steps such as application and drying using a special coating machine. On the other hand, it is a preferable means since the work efficiency is extremely good and the quality is stable because it is simply pasted. Furthermore, if a polysand sheet having a structure in which a polyethylene film is used as a core and sandwiched between the front and back double-sided paper layers is used,
The wood substrate and the paper layer can be easily bonded with an ordinary woodworking adhesive, and the moisture-proof treatment can be performed very easily.

The polyethylene film has a thickness of 10 to 10.
Those having a size of about 50 microns are suitable from the viewpoint of moisture permeability and cost, but are not limited thereto. In addition to polyethylene film, polyester, vinyl chloride, polyolefin, moisture-proof cellophane, polyethylene terephthalate
Or a film of polypropylene, acrylic, or the like. For the two paper layers on the front and back, thin paper, Japanese paper, kraft paper, recycled paper, and other paper-based materials can be used. Adhesion to the back of the tread can be performed using an ordinary woodworking adhesive. For example, urea resin adhesive, melamine resin adhesive, urea melamine co-condensation resin adhesive, vinyl acetate resin adhesive, acrylic resin adhesive, urethane resin adhesive, aqueous vinyl urethane resin adhesive, etc. Can be used.

Adhesion conditions may be selected as appropriate for each adhesive. For example, in the case of hot-pressing using a urea melamine co-condensation resin adhesive, an adhesive coating amount of 50% is used. １００100 g / m ² , pressing temperature 90-110
° C, pressing pressure 5-8 kg / cm ² , pressing time 50-70
It is preferable to perform pressing in seconds by a hot press or a roll press having a hot plate having a flat plate shape or a curved surface shape conforming to the pressing surface.

On the other hand, on the side plate forming a staircase in combination with the tread plate formed in this way, a notch for combination having the same shape as the tread plate is provided by pre-cutting at a factory or the like.

The stairs can be assembled by assembling the precut treads and side plates of the present invention as usual on site.

[0022]

As described above, according to the staircase tread according to the present invention, since the staircase tread is subjected to the moisture-proof treatment, even if it has a complicated shape of the stumble prevention portion, it can be used in a factory. Since the tread is not stretched due to surrounding moisture or moisture, shrinks due to drying, twisted or deformed, it can be installed as a stair with high precision between the notch processing and the on-site construction. There is an extremely large industrial effect that it is possible to manufacture stairs for complicated steps and stairs using the steps, which have been considered impossible by pre-cut processing. Also, by being able to pre-cut, the gap between the side plate and the tread after construction can be extremely small,
It is also aesthetically pleasing.

Also, a smooth arc-shaped surface is provided on the nosing portion of the tread plate, and a stumble prevention portion is provided on the lower surface of the nosing portion.
In addition to being able to safely move up and down the stairs, when viewed from the front, the stairs were superior in design and made to be a high-grade staircase.

Further, by performing the moisture proofing treatment with a polysand sheet, there is a great effect that it is possible to easily and safely provide a step board and a staircase subjected to the moisture proofing treatment.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a step board for stairs according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the stair tread of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Step board for stairs 2 Step board main body 2a Tread board main body back surface 3 Step nose 3a Step nose front 4 Trip prevention part 4a Trip prevention front 4b Trip prevention bottom 5 Moisture proof treatment

Claims (4)

[Claims] 1. A stair tread having at least a back surface subjected to a moisture-proof treatment. 2. A stair tread as claimed in claim 1, wherein before the stairs are assembled, a smooth arc surface is formed in front of the stair nosing portion of the stair plate and a stumbling prevention portion is formed in advance on the lower surface of the nosing portion. 3. The staircase for stairs according to claim 1, wherein the moistureproof treatment is performed on the entire back surface of the tread, and the moistureproof treatment is adhesion of a polysand sheet. 4. The stairs forming the stairs and the side plates are each provided with a notch that allows the stairs to be assembled as a stair before assembling the stairs, and the stairs assembled after the stairs are the stairs of the stairs. Alternatively, a precut staircase, which is the stepboard for stairs according to 3.