JP3081829U - Stairs and steps unit - Google Patents

Abstract

(57) [Summary] [Problem] To build stairs quickly and inexpensively. SOLUTION: A step stone connecting unit 10 is made in a factory, transported to a construction site, and installed on a slope. Step Stone Connecting Unit 1
Numeral 0 indicates that the step stone 12 was fixed on the mat 11 using an adhesive. The mat 11 is obtained by laminating a reinforcing net on the upper side and a polyester nonwoven fabric as a suction prevention sheet on the lower side. A gap 13 of about 20 mm is provided between the steps 12. The step stone connecting unit 10 arranged on the slope is fixed to the slope by driving the pile 20 into the side edge of the mat. Furthermore, the pile 21 is driven into the ground through the hole 15 of the stone to prevent the stone from shifting and floating. A mat extension (width is several tens of centimeters, the material is the same as the mat body 11) on both sides of the mat 11 of the step stone connecting unit 10
And extend it diagonally downward and bury it in the soil. The gap 13 between the steps 12 is filled with a joint material 26.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to stairs that are set up on steep slopes such as embankments and hills.

[0002]

[Prior art]

 In the conventional stairs installation work, crushed stone was spread on the slope, leveled concrete was poured on it, and after curing, after forming, a concrete frame was put into it and concrete was poured into it. After curing, Attach a stone slab. As described above, it is necessary to place and cure concrete twice, and the construction period is long because of the curing. In addition, skilled workers are required to make the formwork, and construction costs are also increased.

[0003]

[Problems to be solved by the invention]

 The purpose of this invention is to make the stair construction work faster and cheaper.

[0004]

[Means for Solving the Problems]

 The staircase of the present invention consists of a stepped stone connecting unit in which a plurality of steps are fixed on a water-permeable mat with a gap between each other, and a step stone connecting unit mat installed on the slope, fixed to the side. And a joint material filled in the gap between the stones of the stone connecting unit installed on the slope (claim 1).

[0005] To construct the stairs, a staircase connecting unit prepared in advance in a factory or the like is carried to the site, and is set on a slope that has been flattened and compacted, and a mat is set with a pile. It is fixed to the slope and the gap between the steps is filled with joint material.

[0006] The stepping stone connecting unit is one in which a plurality of stepping stones are arranged and fixed on a mat. The mat should be permeable so that water does not accumulate on it, and should have high tensile strength so that it can firmly support the stone. Further, it is necessary that the material is not corroded in the soil, and a plastic material is preferable.

[0007] The step stone may be natural stone, artificial stone described later, or even concrete. It is convenient to use an adhesive to fix the stone to the mat, but instead of using the adhesive or in combination with it, place a washer from the back of the mat and screw the bolt into the stone. It may be.

[0008] The stepboard bonded on the mat has a gap left between adjacent ones, and the gap is filled with a joint material after installation. Since there is a gap between the steps on the mat, the two sides of the mat (sides along the longitudinal direction of the steps) are clamped and the connecting unit is lifted by the crane. The stones approach each other and the mat wraps around them in a round fashion, so that the mats and steps are not subjected to excessive force. As described above, since the connecting unit can be lifted by the crane, it can be hung at a predetermined position on the slope, and the work can be easily performed.

[0009] As described above, the stairs of the present invention have a stepping stone connecting unit made at a factory or the like, which is adapted to the slope of the slope, and are installed on the slope and fixed with the piles. There is no need for frames, concrete casting or curing, and stairs can be constructed in a short period of time at low cost. In addition, the formwork becomes construction waste after use, but no waste is generated because the formwork is not used.

[0010] Each of the connecting units is subjected to a force that tends to slide down the slope. In this invention, in order to resist such a force, each mat is fixed to the slope with a pile, but preferably, the pile is driven into the ground through a hole drilled in a step stone (Claim 2). . In this case, each connecting unit can be more firmly fixed to the slope, and the concentration of the force on the lower connecting unit can be avoided.

[0011] The soil on the side of the stairs is easily scoured by rainwater that runs down the slope. In order to prevent this, preferably, an extension of the mat extending obliquely downward is provided laterally from the mat of the staircase connecting unit, and the extension of the mat is embedded in the soil. ). In this way, the soil on the side of the stairs is stabilized by being wrapped in the extension of the mat, and it is possible to prevent the soil from flowing out.

According to a fourth aspect of the present invention, there is provided a step stone connecting unit in which a plurality of steps are fixed on a permeable mat with a gap therebetween. And stairs can be easily made. In addition, since there is a gap between the steps, the mat and the steps are not easily damaged when lifted with a crane so as to hold the opposite sides of the mat.

[0013] Stepping stones are fixed on a mat. Natural stones (eg, granite, andesite, and basalt) look good, but the cost is higher than concrete. Not only that, quarrying of natural stone causes considerable destruction of nature. Therefore, the applicant for the utility model registration attempted to artificially create a natural stone equivalent. The raw material is molten slag that is separated from the molten metal and floats on it during the refining of minerals such as nickel and manganese. The molten slag is taken out of the furnace and cooled slowly in the atmosphere to crystallize the mineral. For crystallization, a temperature range of 1000 ° C. to 800 ° C. is particularly important, and it is necessary to pass through this range over a long time of about 2 to 4 hours. The rock thus formed is processed into a desired size and used. In addition, if the molten slag is put into a mold and gradually cooled, a stepped stone having a desired shape can be obtained, and the processing cost can be reduced. The stone thus obtained has almost the same composition and strength as natural stone, and can be used without distinction from natural stone.

[0014] Molten slag is also obtained when ash (industrial waste and household garbage) is incinerated by incineration and melted to make it harmless. Incinerated ash contains harmful substances such as dioxins and heavy metals, and is a troublesome person that cannot be discarded as it is. This incinerated ash is put into an electric furnace together with a basicity adjusting agent (dolomite, limestone, shells, etc.) and a reducing agent (powder coke), and is reduced and melted at a high temperature of about 1400 to 1500 ° C. As a result, the incinerated ash liquefies and becomes a magma-like state, and harmful substances such as dioxin contained in the ash are exposed to high temperatures, decomposed and vaporized, and collected. Heavy metals (cadmium, lead, hexavalent chromium, etc.) in the incinerated ash are separated from the slag and dissolved in the molten metal at the bottom of the furnace to be recovered. In this way, detoxified molten slag is obtained. This molten slag can also be gradually cooled to a stone material as described above.

[0015] The use of such artificial stones does not cause natural destruction due to the mining of natural stones, and there is a possibility that natural stones can compete with natural stones in mass production. Furthermore, if garbage incineration ash is used as the raw material for the molten slag, effective use of waste can be achieved, and both benefits can be obtained.

[0016]

[Embodiment of the invention]

 As shown in FIG. 1, a step stone connecting unit 10 is a step stone in which a step stone 12 is fixed on a mat 11 using an adhesive. The mat 11 is obtained by laminating a reinforcing net on the upper side and a polyester nonwoven fabric as a suction prevention sheet on the lower side. The mesh of the polyester non-woven fabric is so coarse that almost no soil can pass through, but moisture can pass through, and the reinforcing net is made of a material with little elongation, such as aramid fiber or polyester fiber.

The step stone 12 to be bonded to the mat 11 is a stone having a substantially triangular to trapezoidal cross section processed at an angle corresponding to the slope of the slope, and here natural stone (granite or the like) is used. An adhesive is applied to the back surface of the stepping stone and is attached to the mat 11. A gap 13 of about 20 mm is provided between the step stones 12 and the step stones 12 (both in the left-right and vertical directions). This gap 13 is filled with mortar after installation. A hole 15 for driving a pile is made in the upper step stone.

The thus formed step-coupling unit 10 has a size of about 2.0 m width × 1.5 m length (actually, the periphery of the mat protrudes outside by 50 mm to 150 mm). Weight will be about 1000kg.

As shown in FIG. 2, when the unit 10 is moved on a construction site, the upper and lower sides of the mat 11 are clamped and lifted by a crane. In the gap 13 between the stones, the wooden boards 16 are sandwiched so that the stones do not damage each other.

After leveling the slope on which the stairs are to be installed, the slope is tamped with a stamper or the like. The staircase connecting units 10 are arranged side by side on a slope, usually from bottom to top, as if suspended by a crane (Fig. 3). The step stone connecting unit 10 arranged on the slope is fixed to the slope by driving the pile 20 into the side edge of the mat. As shown in FIG. 4, the pile 20 is a metal rod having a rear end bent in an inverted U-shape. Not only the front end but also the rear end is sharp, and the rear end 20a is also driven into the ground. Further, a pile 21 (large nail) is driven into the ground through the hole 15 of the upper step of each connecting unit to prevent displacement and lifting of the step.

After the connecting unit is installed in this way, as shown in FIG. 5, on both side edges of the mat 11 of the stepping stone connecting unit 10, a mat extension (a width of several tens of centimeters, the material is the same as the mat body 11). ). FIG. 7 shows this connection state, in which the mat body 11 and the mat extension 22 are connected by the connection fitting 23 at substantially constant intervals (intervals of several tens of centimeters). The connection fitting 23 has a pair of upper and lower elongate holding plates 23a and 23b, and two bolts 23c are implanted in the lower holding plate 23b at intervals. Has a hole 23d through which these bolts pass. The tip of the bolt 23c is pointed in a conical shape so that the mat 11 can be penetrated.

The edges of the mats 11 and 22 are overlapped, and a clamping plate 23b with bolts is applied below the mats, and two bolts 23c are penetrated from under the mat. In this way, the holding plate 23a is passed through the bolts appearing on the mat, and the nuts 23e are screwed into the bolts 23c and tightened. By doing so, the two mats are firmly sandwiched between the upper and lower sandwiching plates 23a and 23b and connected. Since the tip of the bolt 23c is sharp and dangerous, the portion protruding from the tip of the nut is cut off using a cutter tool.

The mat extension portion 22 thus added is dug in grooves 25 on both sides of the stairs as shown in FIG. The groove 25 will be backfilled later. This will prevent the soil on the side of the stairs from running off. The mat extension 22 may be integrally formed with the mat body from the beginning instead of being added.

Finally, the gap 13 between the step stones 12 is filled with a joint material 26. The joint material may be cement mortar, but resin-reinforced mortar with improved strength is desirable.

[Brief description of the drawings]

FIG. 1 is a perspective view of a step stone connecting unit.

FIG. 2 is a perspective view of a traveling state of the stepping stone connecting unit. .

FIG. 3 is a perspective view of a state in which a step stone connecting unit is installed on a slope.

FIG. 4 is a longitudinal sectional view showing a state in which a step stone connecting unit is installed on a slope.

FIG. 5 is a perspective view showing a state in which a mat extension portion is connected to a side portion of the step stone connecting unit.

FIG. 6 is a cross-sectional view of a stair.

FIG. 7 is an explanatory diagram of a coupling fitting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Step stone connection unit 11 Mat 12 Step stone 13 Gap 15 hole 20 Pile 21 Pile 22 Mat extension 23 Connection metal fitting

Claims (4)

[Utility model registration claims] 1. A step stone connecting unit in which a plurality of step stones are fixed on a permeable mat with a gap therebetween, and the mat of the step stone connecting unit installed on a slope is placed on a slope. A stair including a pile to be fixed and a joint material filled in a gap between the step stones of the step stone connecting unit installed on a slope. 2. The staircase of claim 1 including a stake that is driven into the ground through a hole drilled in the step. 3. The staircase according to claim 1, further comprising a mat extension extending diagonally downward from the mat to the side of the staircase and embedded in the soil. 4. A gangstone connecting unit comprising a plurality of gangstones fixed on a permeable mat with a gap therebetween.