JP3436584B2 - Case for lightweight protective plate of waterproof sheet and lightweight protective plate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is laid on a waterproof sheet in a waterproof structure such as a balcony or roof of a general house to protect the waterproof sheet from the spread of fire during a fire and the damage caused by falling objects. Regarding the protective member, regarding a protective plate in which a lightweight mortar is filled and molded in a synthetic resin case,
A case for a protective plate made of synthetic resin consisting of two side walls and a bottom plate that is easy to lay, with less warpage, good adhesion to mortar, and lightweight protection that is integrally molded by filling and hardening light mortar in the case It is about boards.

[0002]

2. Description of the Related Art A protective plate laid on a waterproof sheet on a balcony or roof of a general house has a weight of 20 to 25 kg / m.
^A mortar compact of about ² is preferable. However, it is weak in strength and is likely to cause a stepping crack or a defect. Therefore, in order to reinforce the lightweight mortar, as a device of the present applicant's application, the lightweight mortar is filled and molded in a synthetic resin case which is composed of a side wall and a bottom plate, and the side wall and the bottom plate are provided with protrusions. This is disclosed in Japanese Utility Model Laid-Open No. 5-71317.

[0003]

In the case of the above-mentioned synthetic resin case having a box-shaped case having four side walls and a bottom plate, since the case is strong, the shape of the case is sufficiently large against shrinkage during hardening of the mortar. Can be held, there is no warpage and there is no problem. However, in the case of a case composed of two side walls and a bottom plate facing each other, the shape retention of the bottom plate is poorer than that of the box-shaped case described above, and the bottom plate has a reverse taper convex groove or a substantially T-shape. By providing a protrusion, the adhesion between the mortar and the case becomes strong, which is preferable, but due to shrinkage when the mortar is cured and dried, the adhesion between the mortar and the case is too good, which may cause large warpage, When a protective plate having a large sled is laid on a waterproof sheet, it is difficult to fit the plate, and the plate has a problem of being easily broken. Further, an attempt was made to restore the sled by applying a load. Turned out to be difficult.

The present invention has been made in order to solve the above-mentioned problems, and it is less likely to cause warpage, the fitting and laying are easy, and the strength in the case of filling and molding a lightweight mortar in a synthetic resin case, Another object of the present invention is to provide a lightweight protection plate having excellent dimensional stability and capable of repairing a sled.

[0005]

Means for Solving the Problems The technical means of the present invention for solving the above-mentioned problems is a case made of a hard synthetic resin composed of two side walls and a bottom plate which face each other. On the other hand, it is formed in a horizontal shape or in a curved shape so as to be slightly convex, the outer surface of the side wall is formed into a concavo-convex shape that can be fitted, and a single or a plurality of protruding pieces is formed on the inner surface of the side wall. Forming a recessed shape so that the central part of the surface slightly floats inward, and forming a plurality of protruding pieces whose vertical surface is substantially vertical or tapered with respect to the bottom along the inner side surface in parallel in the longitudinal direction, and A groove wall is formed on the bottom plate along the lengthwise direction to form a grooved wall having a groove shape that is substantially right-angled or tapered with respect to the bottom side, to form a lightweight protective plate case for a waterproof sheet. The lightweight protective plate of the waterproof sheet is formed by filling and molding a lightweight mortar having a specific gravity of 0.8 to 1.5 in the case.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a case for a lightweight protective plate of the present invention, an enlarged portion shows a protruding piece of another embodiment, and FIG. 2 shows a lightweight case in which lightweight mortar is filled in the case for a lightweight protective plate of another embodiment. The protective plate is shown, and the enlarged portion shows a concave and convex groove shape according to another embodiment. The case 1 made of hard synthetic resin has a softening temperature of 6 such as acrylonitrile / butadiene / styrene copolymer resin, polyvinyl chloride, polypropylene, polyester.
A thermoplastic resin having a temperature of 0 ° C. or more is formed by extrusion molding into a substantially concave shape having a flat front cross-sectional shape consisting of two side walls a ₁ and a ₂ which face each other and a bottom plate b. And the side walls a ₁ and a ₂ so that they can be fitted to each other.
Concave and convex shapes 11 and 14 are formed on the outer surface of the case in parallel with the bottom plate b along the lengthwise direction, and the inner surfaces of the side walls a ₁ and a ₂ are formed so that the lightweight mortar 3 filled in the case 1 is not demolded. Is formed with a single or a plurality of protruding pieces 12 and 13 in parallel with the bottom plate b along the lengthwise direction, and the bottom plate b has a concave front shape so that the central portion of the bottom plate slightly floats inward. Along the inner surface, the rising surface is substantially perpendicular to the bottom, or as shown in the partial enlarged view of FIG. 1 or as shown in FIG. 2, a tapered protruding piece 15 having a thin upper end and a thick lower end is formed in the longitudinal direction. A plurality of grooved walls 16 are formed on the bottom plate b, and tapered grooved grooves 16 are formed along the length direction so that the groove walls have a substantially right angle to the bottom side or a substantially trapezoidal shape as shown in the partially enlarged view of FIG. To form.

The hard synthetic resin case 1 shown in FIG. 1 has, for example, a plate thickness of 1 to 2 mm, a side wall a height of 18 to 25 mm,
The bottom plate b has a width of 150 to 300 mm, the side wall a and the bottom plate b have a flat cross-section with a substantially concave shape of 300 to 500 mm, and the outer surface of _one side wall a ₁ has a vertical middle position. substantially against the side wall a ₁ with a width (interval) 2 to 6 mm, depth (depth) is provided in the bottom plate b parallel to protrude inside the case along the length of the recessed groove 11 of 1~5mm A projecting piece 12 having a thickness of 1 to 2 mm and a width of 1 to 5 mm is provided along the inner side surface at a right angle substantially parallel to the bottom plate, and the one side wall a ₁ is provided on the outer side surface of the other side wall a ₂ . Convex portion 1 smaller than the inner diameter (spacing) of the concave groove 11 at the same height as the concave groove 11.
4 is provided along the lengthwise direction on the outside in parallel with the bottom plate b, and also on the inside at the same height position as the projecting piece 12 toward the inside of the case, at a right angle to the side wall a ₂ and substantially parallel to the bottom plate, and has a thickness of 1 ~
It is provided with a protruding piece 13 having a width of 2 mm and a width of 1 to 5 mm.
When a plurality of synthetic resin cases 1 are laid in parallel,
The convex portion 14 of the next row, which is adjacent to the concave groove 11 of the front row, can be inserted and inserted so as to be inserted and fitted. Then, the bottom plate b is formed in a concave shape b ₁ having an R-shaped front face so that the center in the width direction thereof rises inward by about 0.5 to 5 mm, and the inner surface of the bottom plate has a thickness of 1 to 2 mm and a high height. 1-5 mm
The protruding pieces 15 are formed in parallel along the length direction in parallel with each other at appropriate intervals in a vertical shape with respect to the bottom surface or in a tapered shape in which the upper end side is thinner and the lower end side is thicker.

The case 1 made of synthetic resin is not limited to the illustrated example, and the protruding pieces 12 and 13 inside the side walls a ₁ and a ₂ are not limited thereto.
May be provided in the upper end of the side wall a or at an arbitrary position horizontally or obliquely upward or obliquely downward in a width of 1 to 2 mm in a plurality of two to three steps. Further, the fitting convex portion 14 is The shape of the convex groove (strip) may be used. Further, the side walls a ₁ and a ₂ are horizontal from the side surface with respect to the bottom plate b or 2 mm at the center.
It is also optional to form a convex shape within the curved shape. The recessed shape b _{1 in} the width direction of the bottom plate b is not only the above-described R-shaped front shape, but also a tapered shape such that the central portion has an apex, or 10 to 50 mm flat from both ends of the side wall. After that, the center portion may be formed into a raised R shape, the above-mentioned tapered shape, or a concave shape. Further, the bottom plate b may have a shape in which the central portion thereof is slightly raised in the length direction. Furthermore, the heights of the protruding pieces 15 provided on the bottom plate b may be the same or different in different steps. Further, in order to improve the adhesion between the mortar 3 and the bottom plate b, and in order to drain water, the groove wall is formed in the bottom plate b in the width direction in a taper shape such as a substantially right angle or a trapezoidal shape with respect to the bottom side as described above. The concave-convex groove shape 16 may be formed along the length direction.

The lightweight mortar 3 is an inorganic foam obtained by foaming volcanic ash in cement such as ordinary Portland cement, ordinary early strength cement, fly ash cement, blast furnace cement, etc., and has an apparent specific gravity of 0.2 to 1.0 . Particle size is 30 ~
Mortar hardened material such as 500μ fine particle lightweight aggregate, sand, glass fiber, vinylon fiber, asbestos fiber, short fiber such as carbon fiber, binder such as methyl cellulose, styrene-butadiene emulsion, acrylic emulsion and water reducing agent. Of a desired slurry prepared by appropriately mixing and adding an appropriate amount of water so as to have a specific gravity of 0.8 to 1.5. Partition plates are provided at both ends of the case and closed, and the lightweight mortar 3 is filled in the case 1 and cured to be integrally molded with the case. The surface of the lightweight mortar 3 has a natural stone with a particle size of 2 to 7 mm or a particle size of 0.
Colored ceramic particles of 5 to 3 mm may be dispersed, embedded in an exposed state, and then cured and cured, and the surface may be coated and fixed with a transparent synthetic resin, or may be colored with a paint.

As described above, since the bottom plate b of the synthetic resin case 1 composed of the two side walls and the bottom plate facing each other is formed in a slightly concave shape, the bottom plate is improved in compression resistance and flexibility. The resistance to the shrinkage force when the lightweight mortar 3 filled in the case 1 is cured and shrunk increases,
It has an effect of suppressing warpage of the bottom plate, and further has a protruding piece 15 of the bottom plate b.
Are formed in a substantially vertical shape or a taper shape with respect to the bottom side and are formed in parallel with each other along the length direction at appropriate intervals, so that the mortar and the case are in close contact with each other and have a reinforcing effect, and There is a deviation with respect to contraction to alleviate the contraction force, which has the effect of suppressing warpage. Furthermore, by forming the bottom plate in the form of concave and convex grooves, the adhesion between the mortar and the case is further enhanced, and the effect of adjusting the unevenness and draining is provided. In addition, the inner protruding pieces 12 and 13 of the side wall a are embedded in the mortar 3 to prevent demolding and to prevent the mortar from separating from the side wall.

For this reason, since the protective plate 2 obtained by integrally molding the case 1 and the mortar 3 has a small warpage, it is easy to insert the side wall of the case into the fitting portion at the time of laying and the workability is good. The mortar does not crack when it is fitted, and even if it walks on the protective plate after installation, there is no rattling and there is no stepping crack. Even if warpage occurs, pressure can be applied to alleviate and reduce the warpage.
A constant shape can be maintained by following repeated movements of contraction and expansion. Further, since the case 1 and the mortar 3 have good adhesion, they have a reinforcing effect in terms of strength.

Next, an example of a concrete embodiment of the protective plate 2 in which the synthetic resin case 1 of another embodiment shown in FIG. 2 is filled with lightweight mortar will be described.

[0013] Synthetic resin case 1 is made of rigid vinyl chloride resin, a plate thickness of 1.5 mm, the side walls a _1, a ₂ height is 18 mm, with the 400mm length, side walls a ₁ of while faced each other
A concave groove 11 having a vertical width (spacing) and a depth (depth) of 6 mm is provided on the outer side surface of the inwardly so as to project inward substantially parallel to the bottom plate, and the other side wall a ₂ On the outer side surface, two pieces of projecting pieces, which are projecting portions 14 having a plate width of 5 mm, are formed at the same height position as the concave groove 11 so as to project outward substantially in parallel with the bottom plate so that the interval is 5 mm. In addition, projecting pieces 12 and 13 having a projecting width of 5 mm are formed in the middle positions of the side walls a ₁ and a ₂ and projecting pieces 12 ′ and 13 ′ having a projecting width of 2 mm are arranged on the upper side so as to be substantially parallel to the bottom plate b. Two pieces are formed to project. Further, the bottom plate b has a width of 180 mm, and the bottom plate b is formed in an arc shape so that the height of the central portion in the width direction is 2 mm, and the bottom plate b has a width of 20 mm.
An uneven groove 16 having a height of 2 mm is alternately provided along the length direction, and a projecting piece 15 having a height of 2 mm is provided in parallel with the uneven groove 16 at a substantially central portion thereof. is there. After sealing both ends of the synthetic resin case 1 with partition plates, a mortar slurry having the following composition is filled and hardened, and naturally cured in an atmosphere of 25 ° C. for 30 days.

(Composition of lightweight mortar) Ordinary Portland cement 100 parts by weight Shirasu balloon 50 parts by weight Sand 60 parts by weight Glass fiber (10 mm) 3 parts by weight Acrylic emulsion 5 parts by weight Water 100 parts by weight The specific gravity was about 1 and the weight per m ² was 21 kg. In addition, the warp of the four corners of the protective plate 2 is 0.2 to 0.5 mm, and the fitting is easy and the fitting is good. Even when the surface of the protective plate is stepped on, there is no rattling and no cracking occurs in the step. .

<Comparative Example> A T-shaped projection having two side walls, a bottom plate and a side wall having the same dimensions as those of the embodiment shown in FIG. 2, the bottom plate being flat and having an inner height of 3 mm and a brim width of 4 mm. 20 pieces
After sealing both ends with partition plates in a synthetic resin case provided at intervals of mm, a lightweight mortar slurry having the same composition as that of the example was filled and cured, and cured at 25 ° C. for 30 days. The warpage of the four corners of the protective plate in this comparative example is 2.5 to 3.0.
The size was mm, the fitting was tight, and the mortar and the case were separated from each other on the side wall when it was forcibly inserted, the fit was bad, and rattling occurred when the surface of the protective plate was stepped on, and the mortar layer was cracked.

[0016]

According to the present invention, a case made of a synthetic resin composed of two side walls and a bottom plate facing each other has a bottom plate formed in a slightly recessed shape, and an upright surface along the inner side surface thereof is substantially perpendicular to the bottom side. Shape or taper shape where the upper end side is thinner and the lower end side is thicker, a number of protruding pieces are provided in parallel in the length direction, so that the strength of the bottom plate is increased and the adhesiveness between the mortar and the bottom plate is improved, but shear resistance against shrinkage of the mortar The protective plate, which has a small shape and is integrally molded by filling and hardening with mortar, has a small amount of warpage and excellent dimensional stability, so that it is easy to fit and lay without cracking. Furthermore, since it can follow the contraction and expansion of temperature, humidity, etc., it has an excellent shape-retaining property. Furthermore, since the adhesion between the lightweight mortar and the case is good, it has a reinforcing effect on the case, and it is light but strong. Suitable as a protective sheet for waterproof sheets.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a lightweight protective plate case of the present invention.

FIG. 2 is a cross-sectional view of a lightweight protective plate in which a case of another embodiment is filled with mortar.

FIG. 3 is a perspective view of the lightweight protective plate case.

[Explanation of symbols]

1: a synthetic resin casing, 2: lightweight protective plate, 3: light weight mortar, a _1, a _2: side wall, b: the bottom plate, b _1: shaped depression, 11: concave groove, 12, 12 ', 13, 13' , 1
5: protruding piece, 14: convex portion, 16: uneven groove

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04D 11/00

Claims (3)

(57) [Claims] 1. A synthetic resin case comprising two side walls and a bottom plate facing each other, the side wall having a horizontal or slightly convex curved upper end with respect to the bottom plate, and fitted to the outer surface of these side walls. Providing a concavo-convex shape that is possible and providing one or more projecting pieces on the inner side surface of the side wall, the bottom plate is formed in a slightly concave shape inside, and the rising surface along the inner side surface is substantially vertical or tapered to the bottom side. A case for a lightweight protective plate of a waterproof sheet, characterized in that a plurality of protruding pieces are provided in parallel in the length direction. 2. A case for a lightweight protective plate, characterized in that the groove wall is formed in the bottom plate of the case of claim 1 along the lengthwise direction so that the groove wall is substantially right-angled or tapered with respect to the bottom side. 3. In the case according to claim 1 or 2,
A lightweight protective plate for a waterproof sheet, characterized by being filled with light mortar having a specific gravity of 0.8 to 1.5 , cured and integrally molded.