JPH04194165A - Cement panel and its production - Google Patents

Abstract

PURPOSE:To increase the strength of cement panels, by forming a plurality of grooves at the bottom of a tray and arranging reinforced rods in the respective grooves and filling cement materials in the tray in which the reinforced rods are buried. CONSTITUTION:A plurality of grooves 2, 3 are formed laterally and longitudinally at the bottom of a tray 4. Next, reinforced rods 5 are arranged one by one in the grooves 2, 3. Next, cement materials 6 are filled in the tray 4 in the buried condition of the reinforced rods 5. The reinforced rods 5 are only placed into the grooves 2, 3 of the tray 4, the reinforced rods are easily positioned so that the under face of the cement panel 1 is covered by the tray 4. In this way, an excellent cement panel 1 in the strength can be stably produced by a simple work and further, dust-generation of cement can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to cement panels used in double floors, etc. constructed for the purpose of sound insulation, underfloor wiring, underfloor ventilation, etc. in buildings, and a method for manufacturing the same. .

``Prior art'' A double floor is a floor structure that has conventionally been installed for the purpose of sound insulation in buildings, underfloor wiring, underfloor ventilation for air conditioning, etc., and is constructed by laying a plurality of panels on the subfloor via supports. is known.

For this double floor panel, a molded product made of cement material such as mortar may be used, or in this case reinforcement made of e.g. carphone fiber to reinforce the cement material with low tensile strength. A molded product with embedded striations was used.

Conventionally, such cement panels are made by pre-assembling reinforcing bars in the form of a lattice net using wire, etc., placing the reinforcing bars in the form of a lattice net into a mold, and then pouring cement material into the mold and press forming. In addition, the cement material was exposed on the surface.

``Problems to be Solved by the Invention'' For this reason, there are problems in which the required strength of the panel cannot be secured because the reinforcing bars are not buried in the predetermined positions, and when the reinforcing bars are assembled in advance without any guidance. Since it has to be positioned within the mold, there is a problem in that manufacturing work is difficult and time-consuming.

That is, when a load is applied on a cement panel installed as a double floor, the tensile stress is generated on the lower side. A tensile load is transmitted to the reinforcing bars at the contact portion between the reinforcing bars and the cement material, thereby preventing tensile failure of the cement material. Therefore, it is ideal that a plurality of reinforcing bars be arranged evenly (with as much surface area as possible in contact with the cement material) without being exposed on the underside of the cement panel.

However, with conventional manufacturing methods, it is difficult to position the reinforcing bars, making it extremely difficult to bury the reinforcing bars in such an ideal arrangement.

In addition, when used on a double floor, the cement material will be exposed on the underside of the floor, so if the underfloor is used as a ventilation path for air conditioning, there is a problem of dust generation from the cement material. Ta.

The present invention was made in view of the above-mentioned conventional problems, and it is possible to provide sufficient strength by arranging reinforcing bars at predetermined positions, and to easily manufacture products of such quality in a stable manner. In addition, it is an object of the present invention to provide a cement panel in which dust generation does not become a problem even when used in a double floor for ventilation, and a method for manufacturing the cement panel.

[Means for Solving 1 Problem] The cement panel of the present invention includes a tray having a plurality of grooves formed in the bottom, reinforcing bars arranged in each of the grooves of the tray, and a state in which the reinforcing bars are embedded. The tray is characterized by being made of a cement material filled in the tray.

Further, the groove is characterized in that a protrusion is formed on the inner surface thereof to support the reinforcing bar in a state that it is spaced apart from the inner surface of the groove.

Furthermore, in the method for manufacturing a cement panel of the present invention, when manufacturing a cement panel in which reinforcing bars are embedded inside, a tray having a plurality of grooves formed at the bottom is supported by a lower mold, and the steps are as follows: After arranging reinforcing bars and pouring uncured cement material into the tray, the upper mold is pressed against the lower mold to press-form and harden the cement material in the tray, thereby forming the tray. The present invention is characterized in that the cement panel is manufactured as an integral molded product.

The reinforcing bars are supported at a distance from the inner surface of the groove by protrusions formed on the inner surface of the groove, and the cement material is poured and press-molded in this state. It is a feature.

"Operation" According to the cement panel or cement panel manufacturing method according to claim 1 or claim 3, the reinforcing bars are easily positioned by simply dropping them into the grooves of the tray, and are placed at predetermined positions on the lower surface side of the cement panel. At the same time, the bottom surface of the cement panel is covered by the tray. Therefore, it becomes possible to stably manufacture cement panels with excellent strength through simple operations, and dust generation from the cement material does not become a problem when used in a double floor.

Furthermore, according to the cement panel or the method for manufacturing a cement panel according to claim 2 or 4, the reinforcing bars are supported in the cement panel in a state in contact only with the protrusions on the inner surface of the groove of the tray, so that the reinforcing bars are supported on the surface of the reinforcing bars. Since the tongue is covered with the cement material, the contact area between the reinforcing bars and the cement material is increased, which is further advantageous in terms of strength.

“Example f.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

In FIG. 1, what is shown as a whole is the cement panel 1 of this embodiment.

This cement panel 1 consists of a tray 4 with a plurality of grooves 2.3 formed in the bottom, reinforcing bars 5 placed one by one in each of the grooves 2.3 of the tray 4, and a state in which the reinforcing bars 5 are embedded. and a cement material 6 filled in the tray 4.

Here, as shown in FIG. 4, the tray 4 is formed in the shape of a rectangular plate as a whole, and the grooves 2.3 are formed in plural in the vertical direction and in the horizontal direction, and the tray 4 as a whole has a lattice shape. I am doing it. On the inner surface of the valley grooves 2 and 3 of this tray 4,
A plurality of protrusions 2a and 3a are formed in the longitudinal direction of the groove.
．． It is configured to be supported in a state separated from the inner surface of 3.

Further, the depth dimension of the groove 2 of this tray 4 is 1. The diameter of the reinforcing bar 5 is set to be larger than the depth of the groove 3, and the reinforcing bar 5 disposed in the groove 2 and the reinforcing bar 5 disposed in the groove 3 are configured not to contact each other at the intersection position. has been done.

The tray 4 can be made of a synthetic resin material with a thickness of about 0.2 mm by vacuum forming, but is not limited to this. For example, it can be made of a water permeable material as described below. It's okay.

The reinforcing bars 5 can be made, for example, by braiding aramid fibers 5a into a braided cord shape as shown in FIG. 3, impregnating them with ebo-beef resin and hardening them, so that the overall shape is shaped like a rod with uneven surfaces. It is preferable to use a hardened one.

With such reinforcing bars 5, the surface becomes intricate due to the unevenness and the surface area becomes large, so that the strength of the cement panel is further improved as will be described later.

Further, as the cement material 6, conventionally used mortar, comfeut containing aggregate, etc. can be used.

The cement panel 1 having the above structure can be easily manufactured, for example, as follows.

That is, as shown in FIG. 6, the tray 4 is supported by a lower die lot whose bottom surface is shaped so that the tray 4 fits into it, and reinforcing bars 5 are sequentially inserted into the grooves 2 and 3 of the tray 4. After pouring the uncured cement material 6 (not shown in FIG. 6) into the tray 4, the upper mold 11, which moves up and down while facing the lower mold 10, is pressed against the lower mold 10 and poured into the tray 4. The cement material 6 may be press-molded and hardened.

At this time, the reinforcing bars 5 are positioned by simply dropping them into the grooves 2.3 whose sides are tapered, and as described above, each reinforcing bar 5 is floating from the inner surface of the groove, and the reinforcing bars 5 are placed close to each other. Since the reinforcing bars 5 are not in contact with each other, the cement material 6 penetrates into every corner of the tray 4 so as to cover substantially the entire surface of each reinforcing bar 5.

Note that when press-molding the cement material 6, the cement material 6
The water seeping out from the upper mold 11 may be sucked out by a vacuum blower or the like through a plurality of drainage passages 11a formed in the upper mold 11. Further, at this time, if a filter plate 12 made of a dehydrating cloth or the like is interposed between the upper mold 11 and the cement material 6, the surface of the cement material 6 can be molded smoothly.

Further, as described above, when the material of the tray 4 is a moisture permeable material, a drainage passage is formed in the lower mold 10 to drain water, and in this case, the filter plate 12 becomes unnecessary.

Furthermore, the tray 4 is supplied and the cement material 6 is added.

The supply of the reinforcing metal 5 or the removal of the finished product can be performed automatically using a device having the same structure as that described in Japanese Patent Publication No. 1-23286, but in this case, the reinforcing metal 5 can also be The stripes 5 can be positioned simply by dropping them into the grooves 2 and 3, and since the tray 4 is interposed between the lower mold 10 and the cement material 6, demolding is also easy.

According to the cement panel 1 of this embodiment or its manufacturing method described above, the following effects are achieved.

That is, the reinforcing bars 5 can be easily positioned by simply dropping them into the grooves 2 and 3 of the tray 4, and can be arranged in a lattice pattern at a constant pitch on the lower surface side of the cement panel. become depressed.

Therefore, it becomes possible to stably manufacture cement panels 1 with excellent strength through simple operations, and when used on a double floor, the cement material 6 is not exposed under the floor and dust generation becomes a problem. It disappears.

Further, within the cement panel 1, the reinforcing bars 5 are supported in a state in which they are in contact only with the protrusions 2a and 3a in the grooves 2 and 3 of the tray 4, and most of the surface of the reinforcing bars 5 is covered with cement material 6.
Moreover, since the surface of the reinforcing bars 5 is uneven, the contact area between the reinforcing bars 5 and the cement material 6 is extremely large, which further improves the strength of the cement panel. be.

In addition, in the case of this embodiment, the bottom surface of the tray 4 (the bottom surface of the cement panel 1) is made uneven to form the grooves 2 and 3 in which the reinforcing bars 5 are arranged, so that the bottom surface is not a smooth surface. In addition to being able to reduce the amount of material used, the continuous convex portions formed on the lower surface exert a bulging effect, resulting in a cement panel with even higher strength.

Note that the present invention is not limited to the above-described embodiments, and various modifications may be made.

For example, the shape of the grooves 2 and 3 of the tray 4, ie, the arrangement shape of the reinforcing bars 5, is not limited to a grid shape, but may be radial.

"Effects of the Invention" As is clear from the above explanation, according to the present invention, sufficient strength of the cement panel can be ensured by placing reinforcing bars at predetermined positions on the lower side of the cement panel. This makes it easy to stably manufacture high-quality cement panels, and also has the effect that dust generation does not become a problem even when cement panels are used in double floors for ventilation.

[Brief explanation of the drawing]

FIG. 1 to FIG. 6 are diagrams showing one embodiment of the present invention,
Figure 1 is a perspective view of the cement panel. Figure 2 is an enlarged side cross-sectional view of the cement panel. Figure 3 is a perspective view for explaining reinforcing bars. Figure 4 is a plan view of the tray. Figure 5 is the tray. A side sectional view of FIG. 6 is a diagram for explaining the manufacturing process of the cement panel. 1...Cement panel, 2, 3...Groove, 2a, 3a...Protrusion, 4...Tray, 5...Reinforcement bar , 6...Cement material,
Work 0...Lower mold, 11...Upper mold. Applicant: Fukubi Chemical Industry Co., Ltd.

Claims (4)

[Claims] (1) Consisting of a tray with a plurality of grooves formed in the bottom, reinforcing bars placed in each groove of the tray, and cement material filled in the tray with the reinforcing bars embedded. A cement panel featuring (2) The cement panel according to claim 1, wherein a protrusion is formed on the inner surface of the groove to support the reinforcing bar in a state that it is spaced apart from the inner surface of the groove. (3) When manufacturing a cement panel with reinforcing bars embedded inside, a tray with a plurality of grooves formed at the bottom is supported by a lower die, reinforcing bars are placed in each groove of the tray, and the tray is After pouring uncured cement material into the tray, the upper mold is pressed against the lower mold to press-form and harden the cement material in the tray, thereby forming the cement as a molded product integrated with the tray. A method for manufacturing a cement panel, the method comprising manufacturing a panel. (4) The reinforcing bars are supported in a state separated from the inner surface of the groove by protrusions formed on the inner surface of the groove, and the cement material is poured and press-molded in this state. The method for manufacturing a cement panel according to claim 3.