JPH1143992A - Main entrance step - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent persons going in and out from slipping and falling down by embedding a heating means inside a concrete layer of a main entrance step so as to melt snow lying on the step. SOLUTION: A main entrance step S is made of precast concrete and formed by integrally molding a horizontal floor plate part 1 and a footstep part 3 extended almost horizontally to the outdoor side through a vertical step difference part from the outdoor side end part of the floor plate part 1. A cross-linked polyethylene resin pipes of a hot water pipe 5 which is a heating means is integrally built in the bent and continuous state inside the floor plate part 1 and footstep part 3. Joints exposed outward from the side face of the floor plate part 1 are connected to both end parts of the hot water pipe 5. After installation of the main entrance step S, the cross-linked polyethylene resin pipe connected to the joints is extendedly piped to feed hot water from a boiler in a house. The main entrance step S is therefore heated to melt snow lying thereon so as to prevent persons going in and out from falling and getting hurt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entrance step having a snow melting function.

[0002]

2. Description of the Related Art Conventionally, as an entrance step at an entrance of a house or the like, for example, Japanese Unexamined Utility Model Publication No. 53-23 discloses a step comprising a stepping portion and a floor plate. In addition, the step portion and the floor plate portion are each made of a precast concrete molded from a concrete material using a predetermined formwork separately.

[0003]

The above-mentioned conventional entrance step does not have a heating means for passing hot water therein, so that, for example, in an area with a lot of snow, snow has accumulated on the entrance step. In the case, or when the snow freezes, there is a problem that a person entering and exiting the entrance falls on a step and is injured.

[0004] It is an object of the present invention to provide a door step having a snow melting function that does not injure a person who enters or exits the entrance by slipping down, and that can be easily performed on site.

[0005]

According to the first aspect of the present invention, a heating step is buried inside a concrete layer.

According to a second aspect of the present invention, in the entrance step of the first aspect, a heating means is integrally incorporated in a concrete plate-like body which has been molded and hardened in advance at a place other than the site. .

According to a third aspect of the present invention, in the entrance step of the first aspect, an upwardly open concave groove is continuously bent on the surface of the concrete plate-like body that has been molded and hardened at a place other than the site in advance. After curing of the concrete plate, a heating means is arranged in this groove,
The mortar is filled and buried.

[0008] The invention described in claim 4 is claim 1 or 2.
In the described entrance step, the concrete layer includes a floor plate portion and a foot portion having a lower surface than the floor plate portion.

[0009] The invention according to claim 5 is the invention according to claims 1 to 4.
In the described entrance step, the heating means is a hot water pipe.

According to a sixth aspect of the present invention, in the entrance step of the fifth aspect, the hot water pipe is a crosslinked polyethylene pipe.

According to a seventh aspect of the present invention, in the entrance step of the first aspect, a heat insulating material layer is provided on a back side of the concrete layer.

(Operation) According to the first to seventh aspects of the present invention, since the heating means is buried inside the concrete layer, the snow accumulated on the entrance step is melted by the heating means. For this reason, the snow that has accumulated snow does not freeze, and people who enter and exit the entrance do not fall on the steps and do not get hurt.

According to the second aspect of the present invention, since the heating means is integrally incorporated in the concrete plate-shaped body which has been molded and hardened at a place other than the site in advance, installation work at the site can be easily performed. Excellent workability.

According to the third aspect of the present invention, an upwardly open concave groove is continuously bent and provided on the surface of a concrete plate molded and hardened at a place other than the site in advance. After the curing, the heating means is arranged in the groove, and the mortar or the like is filled and buried, so that the heating means can be accurately arranged.

According to the fourth aspect of the present invention, since the floor plate portion and the foot step portion are integrally formed, the installation work at the site of the entrance step can be easily performed.

According to the fifth aspect of the present invention, since the heating means is a hot water pipe, a hot water boiler or the like can be used as a hot water supply source, and the maintenance cost is low.

According to the sixth aspect of the present invention, since the hot water pipe is a cross-linked polyethylene pipe, it has flexibility, so that the pipe for hot water flow can be disposed substantially uniformly inside the step portion and the floor plate portion. The entire upper surface of the entrance step can be uniformly heated.

According to the seventh aspect of the present invention, since the heat insulating material layer is provided on the back side of the concrete layer, heat loss to the underground side can be prevented, and the heat efficiency is excellent.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the entrance step of the present invention, and FIG. 2 is an enlarged sectional view showing a main part of FIG.

As shown in FIG. 1, S is an entrance step which is manufactured in a factory and has a substantially square shape in plan view, and has a horizontal floor plate portion 1 and a step portion perpendicular to the outdoor end of the floor plate portion 1. It is made of precast concrete molded integrally with a foot step portion 3 extending almost horizontally to the outside via 2, and a heat insulating material 4 is provided on the back side thereof in a laminated manner. Holes 9, 9 into which the lower ends of porch columns (not shown) are fitted are recessed at both end portions of the floor plate portion 1 on the side of the step portion 2. The thickness of the entrance step S is about 100 mm including the heat insulating material 4.

As shown in FIG. 2, a cross-linked polyethylene resin pipe (hereinafter referred to as a cross-linked PE pipe), which is a hot water pipe 5 serving as a heating means, is bent and continuous inside the floor plate section 1 and the step section 3. It is built-in. Reference numeral 10 denotes a reinforcing steel bar.

The heat insulating material 4 is a plate-like foam made of polystyrene having a thickness of about 30 mm, and a large horizontal portion 4 corresponding to the floor plate portion 1.
1 and a vertical portion 42 corresponding to the step portion 2 and a small horizontal portion 43 corresponding to the stepping portion 3. As shown in FIG. ing. As shown in the drawing, the large horizontal portion 41 and the small horizontal portion 43 corresponding to the left and right sides of the floor plate portion 1 and the foot step portion 3 are notched by a predetermined width in the front-rear direction. The notches 411 and 431 correspond to the upper surfaces of the below-described foundation ceilings 6 and 6 on which the entrance step S is mounted.

The large horizontal portion 41 and the small horizontal portion 4 of the heat insulating material 4
As shown in FIG. 4, a large number of depressions 4a having a square shape in a plan view are provided on the surface of 3. The size of the depression 4a is about 65 mm in length and width, and about 20 mm in depth. These recesses 4a, 4a,...
4b is fitted. The size of the block piece 4 b is about 65 mm in length and width and about 40 mm in height, and is made of the same material as the heat insulating material 4. A groove 4c having a width of about 15 mm and a depth of about 20 mm is provided on the upper surface of the block piece 4b.

As shown in FIG. 5, the large horizontal portion 4 of the heat insulating material 4
1 and grooves 4c, 4c of the block pieces 4b, 4b,.
A part of the hot water pipe 5 which is bent and shaped into a predetermined shape is fitted and held. At both ends of the hot water pipe 5 corresponding to the inflow side and the outflow side of the hot water, as shown in FIG.
Joints 51, 51 of a fastening method made of gunmetal are connected, and one side of the joints 51, 51 is exposed to the outside (indoor side) from the side surface of the floor plate portion 1.

Next, the construction of the entrance step S will be described. FIG. 7 is a sectional view showing a use state of the entrance step S, and FIG. 8 is a sectional view taken along line XX of FIG.

First, the foundation ceilings 6, 6 are provided in contact with the foundation 7 on the building side, and on the upper surfaces of the foundation ceilings 6, 6, an elastic tape made of polyethylene having an adhesive layer provided on one side ( (Not shown). Next, the bridge | crosslinking PE pipes 5a and 5a are respectively connected to both joints 51 and 51 exposed outside from the side surface of the floor board part 1 of the entrance step S. Then, the entrance step S is lifted using a rope or the like, and is hung and installed on the left and right foundation crowns 6, 6. At the time of installation, the crosslinked PE pipes 5a, 5a are inserted into holes 71, 71 provided at predetermined positions of the foundation 7. The gaps between the holes 71, 71 and the crosslinked PE pipes 5a, 5a are filled with a filler 8 such as mortar.

Then, the lifting rope is removed, and the installation work of the entrance step S is completed. Crosslinked PE pipe 5
a, 5a with extension piping, boiler in house (not shown)
, And warm water is sent from the boiler, so that the entrance step S is warmed. As a result, the snow accumulated on the entrance step S is melted.

In the entrance step S, an elastic tape is attached to the upper surface of the base top 6, and the back side of the entrance step S is mounted on the base top 6 by abutting, as described above. Since the surface of the elastic tape is not in contact with the heat insulating material 4 but in the concrete body, the entrance step S does not rattle.

The surface of the heat insulating material 4 has a number of depressions 4a.
Is provided, and the block piece 4b is fitted into the recess 4a. By changing the fitting direction of the block piece 4b, the shape of the hot water pipe 5 can be arbitrarily changed.

In the above-described embodiment, the hot water pipe 4 is integrally incorporated at the time of the molding of the entrance step S. However, as shown in FIG.
An entrance step having upwardly open continuous grooves 11 and 31 is formed in advance on the surface portions of the floor plate portion 1 and the step portion 3, and the hot water pipe 5 is bent and bent in the continuous grooves 11 and 31. After the arrangement, the gap between the continuous grooves 11 and 31 may be filled with mortar 8a or the like and buried. The work of burying the hot water pipe 5 may be performed in advance at a factory or the like, or may be performed at a construction site. As shown in the figure, the bottom surfaces 11a and 31a of the continuous grooves 11 and 31 are formed into semicircular curved surfaces.
A polystyrene foam 4A as a heat insulating material is interposed between 1a and the outer surface of the lower half of the crosslinked PE pipe 5.

In the above embodiment, the hot water pipe is a crosslinked PE pipe, but a resin pipe such as a hard vinyl chloride resin, a polybutene resin, or a polyester resin, or a metal pipe such as a copper pipe or a stainless steel pipe may be used.

In the above embodiment, the hot water pipe is used as the heating means. Instead of this hot water pipe, a resistance heating element such as a nichrome wire or a sheet heating element may be used as the heating means. In this case, it is preferable to use glass wool or the like as a heat insulating material.

[0032]

According to the first to seventh aspects of the present invention, since the heating means is buried in the concrete layer, the snow accumulated on the entrance step is melted by the heating means. For this reason, the snow that has accumulated snow does not freeze, and people who enter and exit the entrance do not fall on the steps and do not get hurt.

According to the second aspect of the present invention, since the heating means is integrally incorporated in the concrete plate which has been molded and hardened in advance, installation work on site can be easily performed, and the workability is excellent. I have.

According to the third aspect of the present invention, an upwardly open concave groove is continuously bent on the surface of the concrete plate formed and hardened in advance, and a heating means is disposed in the concave groove. , Mortar and the like are filled and buried, so that the arrangement of the heating means can be performed with high accuracy.

According to the fourth aspect of the present invention, since the floor plate portion and the foot step portion are integrally formed, installation and construction on site can be easily performed.

According to the fifth aspect of the present invention, since the heating means is a hot water pipe, a hot water boiler or the like can be used as a hot water supply source, and the maintenance cost is low.

According to the sixth aspect of the present invention, since the hot water pipe is a cross-linked polyethylene pipe, the pipe has flexibility, and the hot water pipe can be disposed substantially uniformly inside the step portion and the floor plate portion. The entire upper surface can be heated uniformly.

According to the seventh aspect of the present invention, since the heat insulating material layer is provided on the back side of the concrete layer, heat loss to the underground side can be prevented, and the heat efficiency is excellent.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an entrance step of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of FIG.

FIG. 3 is a perspective view showing a state in which a concrete layer is removed in FIG.

FIG. 4 is an explanatory view showing a main part of a heat insulating material.

FIG. 5 is an enlarged sectional view showing a main part of FIG.

FIG. 6 is an enlarged sectional view showing a main part of FIG.

FIG. 7 is a sectional view showing a use state of the entrance step of FIG. 1;

FIG. 8 is a sectional view taken along line XX of FIG. 8;

FIG. 9 is an enlarged sectional view showing a main part of a modification of the entrance step of the present invention.

[Explanation of symbols]

 S Entrance step 1 Floor plate part 2 Step part 3 Foot part 4 Insulation material 41 Large horizontal part 43 Small horizontal part 411,431 Notch part 4a Depression 4b Block piece 4c Groove 5 Hot water pipe (heating means) 51 Joint

Claims (7)

[Claims] 1. An entrance step, wherein a heating means is buried inside a concrete layer. 2. The entrance step according to claim 1, wherein the heating means is integrally incorporated in the concrete plate-shaped body which has been molded and hardened at a place other than the site in advance. 3. An upwardly open concave groove is continuously bent on the surface of a concrete plate which has been molded and hardened at a place other than the site in advance, and after the concrete plate is hardened, the groove is formed. 2. The entrance step according to claim 1, wherein a heating means is disposed in the interior, and mortar or the like is filled and buried. 4. The entrance step according to claim 1, wherein the concrete layer comprises a floor plate portion and a step portion having a lower surface than the floor plate portion. 5. The entrance step according to claim 1, wherein the heating means is a hot water pipe. 6. The entrance step according to claim 5, wherein the hot water pipe is a cross-linked polyethylene pipe. 7. The entrance step according to claim 1, wherein a heat insulating material layer is provided on the back side of the concrete layer.