JP2504716Y2 - Arizo Anchor-Gripping Precast Concrete Large Ceramic Tile for Board Tip - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel structure for significantly improving the adhesive force and shearing force of a large-sized ceramic tile to be attached to a PC board as compared with the conventional structure.

[0002]

2. Description of the Related Art (1) First Prior Art Conventionally, small tiles having a groove having a depth of 0.5 [mm] to 1.0 [mm] on an adhesive surface with concrete are widely used. Has been done.

(2) Second Prior Art Conventionally, when a large tile of about 60 [cm] in length and width and PC concrete are attached in advance, the tile is cracked due to the stress generated when the concrete shrinks during curing. In order to prevent the above, the whole adhesive surface is attached with an elastic adhesive layer such as burch rubber to absorb the shrinkage stress, a hole is provided completely different from the dovetail groove, and a metal anchor is attached through the hole to attach a bolt nut, etc. It is known that it is tighter.

(3) Third Prior Art Conventionally, there is a metal fitting of ceramic tile and PC concrete by a standard type called a my connector.

[0005]

SUMMARY OF THE INVENTION However, all of the above prior arts still have the following major drawbacks.

[0006] The first prior art is a traditional small tile, so that the individual weight is light and the groove is small, so that the uncured concrete does not flow sufficiently and a cavity is created in the dovetail. There is a drawback that the adhesive force, the tensile force, the shearing force, etc. of the adhesive surface between the tile and the PC board are extremely weak. In addition, while the dovetail small piece tile that has been widely used in the past has some effect, the conventional concrete 4 shrinks as shown in FIG. 4, which shows the conventional small piece tile PC concrete with cracks near the dovetail groove 2. A crack 21 was often generated near the acute corner of the upper side, which was a big drawback. Moreover, the bonding of the individual small tiles to the PC board requires a lot of trouble, and thus there remains an even greater problem.

The second prior art is the adhesion of a large ceramic tile to a PC board, but the direct adhesion has a tensile strength of about 15 [kg / cm ² ] unless cracks occur. As described above, there is a major drawback in that cracking occurs due to shrinkage during hardening of concrete in most cases. In addition, the above-mentioned one in which an elastic layer such as burch rubber is adhered through the entire surface has a weak tensile strength and is lowered to about 6 to 8 [kg / cm ² ], and since the adhesive layer is an organic substance, deterioration over time is inevitable. There is a problem. Moreover, it has a major drawback that it has a risk of producing toxic gas in case of fire.

[0008] The third prior art is a gluing connection using a standard metal object, so a large metal object can be used to obtain a large bonding force, so it is also used for large tiles.
These secondary processings have the drawbacks that much labor is required, the cost of metal materials is high, and the productivity is significantly reduced.

The present invention eliminates all of the above-mentioned drawbacks of the prior art, does not require much labor, and does not cause cracks by reasonably absorbing shrinkage stress. The strength is more than double that of any of the conventional technologies, no deterioration over time, and almost no toxic gas is generated in the event of a fire. Both productivity and quality are high, and it is resistant to disasters. The purpose of the invention is to provide a remarkably new structure of a large-sized ceramic tile for a PC board.

[0010]

[Structure of the present invention: means for solving the problem] In the present invention,
In order to solve the above-mentioned problems, the following extremely effective new means have been founded and constructed. That First, there depth of the groove, the conventional 1 [mm] 2 more than doubled with respect to following [mm]
The above is set to 5 [mm] or less. If it is less than 2 [mm], uncured PC concrete will not flow sufficiently and it will be 5 [mm].
When it exceeds, the thickness becomes more than half of the thickness of the tile, and the strength of that portion becomes weak. The width of the dovetail groove is 5
Although it is set to [mm] or more and 10 [mm] or less, this is also 5 [m]
m] is less than uncured concrete, and
This is because if it exceeds 10 [mm], the gripping force as the dovetail groove becomes weak. Next, the above dovetail grooves are provided in a plurality of lines substantially parallel to the bonding surface of the large-sized ceramic tile with the PC plate.
Then, the nearest recesses of the adjacent dovetails face each other, and both ends of the band-shaped and side C-shaped elastic anchors are inserted into the recesses of the adjoining dovetails to be fitted by gripping. The structure is For example, spring steel is used as the material of the side C-shaped elastic anchor. The spring steel may be heat treated spring steel or machined spring steel. Next, the distance between the dovetail grooves is preferably 300 [mm] or less. This is because if it exceeds this, the adhesive strength of the entire ceramic plate and the PC plate is reduced. Furthermore, an elastic adhesive is applied to the inner surface of the dovetail groove and a part of the periphery of the groove. This is because the shrinkage stress when the uncured PC concrete hardens concentrates in the groove part, so by absorbing those stresses, P
This is to prevent shrinkage cracks of C concrete.

[0011]

In the present invention, unlike the prior art, it is a large tile and the depth and width of the dovetail groove are more than double those of the conventional one.
Since PC concrete containing mortar flows in very well, no cavity as in the conventional case can be formed and sufficient tensile strength is generated after curing. Further, since the elastic adhesive is applied to a part or all or the peripheral portion of the dovetail groove, stress is most likely to be concentrated, and the stress is absorbed in the periphery of the dovetail groove so that cracks do not occur. . Further, since the strip-shaped anchor is made of spring steel, the ends of the C-shaped anchor can be tightly gripped in the adjacent recesses of the adjacent dovetail groove by expanding the C-shaped ends without difficulty. Thus, when the uncured concrete is sufficiently poured and hardened in the form in which the C-shaped anchor is gripped, solidified concrete exists before and after the C-shaped portion. Even if a tensile force or a shearing force is applied between the large-sized ceramic tile with a C-shaped anchor and the PC concrete that is subsequently formed and solidified, the C-shaped of the anchor is in a rigid state, which is extremely high. Hard to deform. Therefore, the gripping state of the C-shaped anchor with respect to the adjacent groove is not deformed and is strong, so that the structure of the present invention exerts a large tensile force and shearing force which have never been seen.

[0012]

[Embodiment 1] The structure of a dovetail anchor grip precast concrete plate pre-applied large-sized ceramic tile according to the present invention will be described with reference to FIGS. 1, 2 and 3. FIG.
FIG. 3 is a top view of the ceramic tile for precast concrete plate tip attachment in this embodiment before PC concrete placement, FIG. 2 is its front view, and FIG. 3 is an enlarged front view of the periphery of the dovetail groove. 900 [mm] x 900 [mm] x 6 [m
[m] large ceramic tile 1 has a width of 20 [m on the back surface.
m] and depth 3 [mm], two dovetail grooves 2 in pairs 300
Three pieces were installed at a [mm] pitch. Furthermore, width 20 [m
m] and a thickness of 1 [mm], an elastic band-shaped metal is bent into a C shape to have a spring shape, and the end portion of the metal anchor 3 is slightly expanded.
Hook on the wedge-shaped part of the dovetail groove 2 and hold it. Next dovetail 2
A polysulphide adhesive is applied to the peripheral flat surface of the sapphire over a width of 50 [mm] to a thickness of about 1 [mm], and the adhesive surface 40
After making [%] the elastic layer 5, uncured PC concrete 4 was cast. Since the warp of the large ceramic tile 1 in the initial stage after the construction was significantly reduced, it was confirmed that the elastic layer 5 of the polysulfide adhesive absorbs the displacement of the PC concrete 4 due to hardening and drying shrinkage. .
Regarding the adhesive strength, the large ceramic tile 1 and P
Direct adhesion to C concrete 4 is 20 [kg / c
m ² ], polysulfide adhesive part is 8 [kg / cm
² ] and the former is large, the average value is 18
A high adhesive strength of [kg / cm ² ] could be obtained. Furthermore, the adhesive strength of the metal anchor 3 part is 40 to 50.
It was confirmed that it was [kg / cm ² ] or more, and when viewed comprehensively, a tensile strength of 25 [kg / cm ² ] which was more than double that of the conventional one was obtained, and it was found that it has an extremely stable structure.

[0013]

[Effects of the Invention] (1) In the present invention, since the width and depth of the groove on the PC concrete plate bonding surface of the ceramic tile are more than double those of the conventional one, the uncured PC concrete can be filled in half. Since the cavity of the dovetail groove that is often seen in the prior art is completely eliminated, the tensile strength and shear strength are considerably increased.

(2) In the present invention, the elastic adhesive is not applied to the entire bonding surface of the ceramic tile with the PC concrete as in the prior art, but only the groove portion is provided. And ceramic tile and PC
Since the concrete is directly adhered, the stress due to the hardening shrinkage of the PC concrete can be absorbed in the dovetail groove, the shrinkage crack is eliminated, and the adhesive strength becomes remarkably higher than the conventional one.

(3) In the present invention, the structure of the anchor portion is also completely different. Instead of forming a hole in the ceramic plate to pass the anchor, the tip of the elastic strip C-shaped anchor is expanded and inserted into the adjacent dovetail groove. As a result, work efficiency and productivity are many times higher than those of the prior art, and thus costs are low.

(4) In addition, since the C-shaped anchor of the present invention maintains the C-shape stably after the PC concrete is hardened, the adhesive force between the large ceramic tile and the PC board is more than the conventional one. Will also be significantly larger.

(5) The large-sized ceramic tile for pre-applying a PC concrete plate according to the present invention is hardly deteriorated with time, does not generate toxic gas in the event of a fire, and can be used in a stable form.

[Brief description of drawings]

FIG. 1 is a top view of a large-sized ceramic tile for PC board attachment in an embodiment of the present invention before PC concrete is placed.

FIG. 2 is a front view of a large-sized ceramic tile for PC board tip attachment according to an embodiment of the present invention.

FIG. 3 is an enlarged front view around a dovetail groove portion of a large-sized ceramic tile for PC board attachment.

FIG. 4 is a cross-sectional view showing a small piece tile PC concrete in which a crack has occurred near a dovetail groove in the related art.

[Explanation of symbols]

1 Large Ceramic Tile 2 Dovetail 3 Anchor 4 PC Concrete 5 Elastic Adhesive Layer 21 Cracks in Dovetail PC Concrete in Conventional Technology

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takashi Mizo 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation (72) Inventor Shinobu Osaki 2-3-6 Okura, Ginza, Chuo-ku, Tokyo Incorporated company (72) Inventor Hideo Igami 3728-8 Shimookamoto, Kawachi-cho, Kawachi-gun, Tochigi Clay Burn Ceramics Co., Ltd. (56) References 63-25712 (JP, U) Actual 55 -59020 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A depth of 2 [mm] or more and 5 [mm] or less and a width of 5
A plurality of dovetail grooves having a diameter of not less than [mm] and not more than 10 [mm] are provided on an adhesive surface with a precast concrete plate (abbreviated as a PC plate), and an elastic adhesive is applied to a part or all of the dovetail grooves. , In each of the recesses adjacent to each other of the other dovetail groove,
A large-sized ceramic tile for attaching a dovetail anchor grip PC plate tip, characterized by being formed by gripping both ends of an elastic band C-shaped metal anchor.