JPH0422660Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is used in computer rooms with high wiring density such as wiring cables and cords, or offices where various office equipment is arranged. This invention relates to a flooring material that forms a floating floor with an appropriate space above the floor by closely connecting and fixing it on a flat surface.

(Prior Art) With the advancement of office automation, opportunities for a large number of office equipment and communication equipment to be placed in an office are increasing. For this purpose, wiring and piping must be laid on the floor. In order to make this installation work easier, a floating floor is constructed with a suitable space above the floor.

Since the flooring materials constituting the floating floor are installed on the floor, they are required to have high strength so as not to be damaged by placing heavy objects such as office equipment on the top surface or by people walking on the flooring materials. In addition, flooring materials are required to make relatively little footsteps when walking, to be comfortable to walk on, and to be nonflammable.

Inorganic hardened materials such as controls are comfortable to walk on, reduce noise such as footsteps, and are nonflammable. However, inorganic cured materials do not exhibit sufficient strength and may be damaged by impact or the like. For this reason, as a flooring material,
An inorganic hardened body with a steel plate glued to the back is used. Such flooring materials have high strength, provide a good walking feel, and are nonflammable, so they are suitable for use as constituent materials for floating floors.

The inorganic cured body and the steel plate are usually bonded together with an adhesive. In order to firmly adhere the two, it is necessary to uniformly interpose the adhesive over a wide range between the two. For example, if the adhesive surface is square,
Sufficient adhesive strength will not be exhibited unless the adhesive is applied to the center of the adhesive surface so that it has an area larger than a square with at least one side having a length of 85% or more of one side of the adhesive surface. Therefore, the adhesive strength is sufficient as long as the area to which no adhesive is applied is within a region having a width of 7.5% or less of one side from the periphery of the adhesive surface.

However, even if an adhesive is applied to the bonding surfaces of an inorganic cured body or a steel plate and the two are bonded together, if the amount of adhesive is not sufficient, there will be a portion where no adhesive is present between the two bonding surfaces. As a result, the adhesive strength between the two decreases, making it impossible to exhibit sufficient strength as a flooring material. In order to solve this problem, a method is adopted in which a large amount of adhesive is applied to the center of the adhesive surface of an inorganic hardened body or a steel plate and the two are pressed together. In this method, the adhesive applied to the center of the adhesive surfaces is spread in all directions between the two adhesive surfaces, so that the adhesive spreads uniformly between the two adhesive surfaces. However, if the amount of adhesive applied to the center of the adhesive surface is small, the adhesive will not spread sufficiently, and the adhesive will not reach the periphery of the adhesive surface, resulting in insufficient adhesive strength. There is. In particular, since the adhesive is spread in a substantially circular shape from the center of the adhesive surface, if the amount of adhesive is small, the adhesive will not reach the corners of the rectangular adhesive surface. On the other hand, if the amount of adhesive is too large, the adhesive will ooze out from the periphery of the adhesive surface, adhere to the peripheral surface of the inorganic cured body or the steel plate, and stain the peripheral surface.

(Problems to be solved by the invention) The present invention solves the above-mentioned conventional problems, and its purpose is to firmly bond the inorganic hardened body and the steel plate without the adhesive protruding from the peripheral side. Our goal is to provide quality flooring materials.

(Means for solving the problem) The flooring material of the present invention is a flooring material in which a flat inorganic hardened body and a flat steel plate are bonded together with an adhesive, and the inorganic hardened body is bonded to the steel plate. An endless concave groove is formed along the periphery of the adhesive surface at the periphery of the surface,
Thereby, the above objective is achieved.

(Example) The present invention will be described below with reference to embodiments.

As shown in FIGS. 1 and 2, the flooring material of the present invention includes an upper inorganic hardened body 10 and a lower steel plate 20.
The two are bonded together with an adhesive 30. The inorganic cured body 10 has a flat plate shape, for example, the upper and lower surfaces are rectangular or square with a side length of about 30 to 60 cm, and a thickness of about 15 to 30 mm. The steel plate 20 also has a flat plate shape, and its upper and lower surfaces are rectangular or square in the same size as the upper and lower surfaces of the inorganic hardened body 10. The thickness thereof is, for example, about 0.2 to 2.0 mm. The inorganic cured body 10 and the steel plate 20 are bonded together so that the bottom surface of the inorganic cured body 10 and the top surface of the steel plate 20 are aligned.

A groove 12 is formed in the lower surface 11 of the inorganic cured body 10 (therefore, the bonding surface to be bonded to the steel plate 20). As shown in FIG. 3, the groove 12 is endlessly formed in the peripheral area of the adhesive surface 11 along the periphery of the adhesive surface 11. As shown in FIG. The groove 12 does not necessarily have to be parallel to the periphery of the adhesive surface 11. The groove 12 is formed, for example, from the periphery of the adhesive surface 11 by 5
It is formed in a rectangular cross-section with a width of about 1 to 10 mm and a depth of about 1 to 10 mm, about 45 mm inside.

The inorganic hardened body 10 may be anything that has cement as its main component, such as sand, aggregate such as fly ash, glass fiber, asbestos, vinylon fiber, carbon fiber, or aramid fiber (for example, manufactured by DuPont, trade name: Kevlar). It may also contain reinforcing fibers such as.

As the steel plate 20, an iron plate without bending or warping, a galvanized iron plate, or the like is used.

The inorganic cured body 10 and the steel plate 20 are bonded together using an adhesive 30. As the adhesive 30, a reactive hardening adhesive such as an epoxy adhesive, a urethane adhesive, a polyester adhesive, etc. is used. and,
A required amount of such adhesive 30 is applied, for example, to the center of the bonding surface of the steel plate 20, and the bonding surface 11 of the inorganic cured body 10 is pressure-bonded to the bonding surface of the steel plate 20. Thereby, the adhesive 30 is spread in all directions and spreads between the inorganic cured body 10 and the steel plate. At this time, when the spread adhesive 30 reaches the groove 12, it enters the groove 12 and does not spread outward beyond the groove 12. When the adhesive 30 is cured, the inorganic cured body 10 and the steel plate 20 are firmly bonded together with the adhesive 30.

The flooring material thus obtained forms a floating floor by closely arranging it on the same plane.
Each corner of each flooring material is engaged, for example, with bolts supported on the floor. In this way, when each corner is supported with bolts, each corner of the flooring material is An engagement hole is formed in each part. Each engagement hole is
Usually, it is formed so as to penetrate the steel plate 20 and the inorganic hardened body 10 in the vertical direction. In such a case, as shown by the two-dot chain line in FIG. 3, an annular groove 15 (width 1 to About 3mm,
If you form a depth of about 1 to 6 mm),
This is effective because there is no possibility that the adhesive will infiltrate into the engagement hole.

The steel plate 20 may be bent upward so that its peripheral edge engages with the peripheral side surface of the inorganic hardened body 10. In addition, when engagement holes are formed in each corner of the flooring material, a cylindrical portion that fits into the engagement holes formed in the inorganic hardened body 10 is provided around the engagement holes formed in the steel plate 20. It may be configured so that it protrudes. In this case, there is no risk of the adhesive leaking into the engagement hole of the inorganic hardened body, and there is also no risk of the inorganic hardened body and the steel plate sliding and shifting when the inorganic hardened body and the steel plate are pressed together.

(Experiment example 1) As inorganic hardened material, 100 parts by weight of cement, 70 parts by weight of sand
parts by weight, 3 parts by weight of vinylon fiber, 0.1 part by weight of methyl cellulose, and 50 parts by weight of water, and these were mixed and filled into a rectangular parallelepiped mold with internal dimensions of 50 cm x 50 cm x 20 mm and press-molded. On the bottom of the formwork, at a distance of 3 mm from the peripheral side, a 2 mm wide
A protrusion having a height of 3 mm is formed in an endless shape parallel to the circumferential side. The mixture filled in the formwork,
After curing in the atmosphere for 30 days, an inorganic cured product was obtained. The obtained inorganic cured body has a rectangular parallelepiped shape of 50 cm x 50 cm x 20 mm, and a groove with a width of 2 mm and a depth of 3 mm is formed on the bottom surface 3 mm inside from the periphery. They were parallel and endless.

On the other hand, the steel plate used was a 0.5 mm thick galvanized steel plate processed into a square shape with upper and lower surfaces of 50 cm x 50 cm. Then, apply 50g of epoxy adhesive near the center of the steel plate, and
The above-mentioned inorganic cured body was press-bonded with both adhesive surfaces aligned. Thereafter, the adhesive was cured to obtain the flooring material of the present invention. The obtained flooring material was firmly bonded with an adhesive, and the adhesive did not protrude from the peripheral side surface. With the four corners of the flooring supported, a cylindrical steel bar with a diameter of 50 mm was vertically pressed against the center of the upper surface to apply a load, and the fracture strength under concentrated load was measured. The breaking strength was 1950Kg.

(Comparative Example 1) A flooring material similar to that of Example 1 was obtained except that no grooves were formed on the adhesive surface of the inorganic cured body. Adhesive was protruding from the peripheral side of the flooring, and it took a lot of time and effort to remove this adhesive. The peripheral surface from which the adhesive had been removed had a poor finish and was dirty. The breaking strength of this flooring material was 1900 kg.

(Comparative Example 2) A flooring material similar to Comparative Example 1 was obtained except that the amount of adhesive was 20 g. Although the adhesive did not protrude from the circumferential side of the flooring and the circumferential side did not get dirty, the breaking strength was 1500 kg.

(Effects of the invention) As described above, in the flooring material of the invention, even if a large amount of adhesive is used, there is no risk of it protruding onto the peripheral side.
Therefore, a large amount of adhesive can be used, and the inorganic cured body and the steel plate can be firmly bonded.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the flooring material of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a bottom view of the inorganic cured body. 10...Inorganic hardened body, 12... Concave groove, 20...
Steel plate, 30...adhesive.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A flooring material in which a flat inorganic hardened body and a flat steel plate are bonded together with an adhesive, and the adhesive is attached to the periphery of the adhesive surface of the inorganic hardened body to the steel plate. A flooring material with endless grooves formed along the periphery of the surface. 2. The flooring material according to claim 1, wherein engaging holes penetrating vertically are formed in each corner of the inorganic hardened body and the steel plate. 3. The flooring material according to claim 2, wherein an annular groove surrounding the engagement hole is formed around the engagement hole on the adhesive surface of the inorganic cured body.