JPS624311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In recent years, panel-type assembled water tanks have been increasingly used as elevated water tanks or water receiving tanks installed on the rooftops or basements of high-rise buildings. These assembled aquarium panels are preferably made of iron whose surface is coated with resin or made of glass fiber reinforced plastic.

Among these, iron panels are particularly suitable for use in large aquariums due to their strength, but it is common to provide reinforcing ribs on the pressure-receiving surface of square panels in order to minimize deformation due to pressure when assembled into an aquarium. The most common reinforcing ribs in iron panels are, for example, as disclosed in Japanese Utility Model Application Publication No. 139415/1983.
It is often formed in the center of the panel so that its planar shape is approximately cross-shaped or X-shaped.

However, conventional iron panels equipped with such reinforcing ribs are not necessarily satisfactory in terms of strength, and in the current situation where assembled water tanks are becoming larger, it is necessary to develop a structure with higher pressure resistance suitable for such assembled water tanks. Development of a panel was desired.

Accordingly, it is an object of the present invention to provide an iron panel with higher strength than conventional panels.

The high-strength iron pressure-resistant rectangular panel of the present invention that achieves this objective has a rectangular pressure receiving part located inside a peripheral flange, a flat base wall surrounding this rectangular pressure receiving part, and a central pressure receiving part surrounded by the base wall. a step wall provided in the central pressure receiving section and protruding toward either side of the base wall; It has a structure in which the width gradually becomes narrower and the height gradually increases toward the central intersection of the pressure-receiving part, and a reinforcing rib whose height changes smoothly in the central part. .

The present invention will be explained below based on the drawings.

FIG. 1 is a plan view illustrating the iron pressure-resistant rectangular panel of the present invention, which has the most common shape in which the pressure-receiving portion is square.

In the figure, 1 is the peripheral flange, 2 is the peripheral flange 1
The rectangular pressure receiving portions 2 are respectively shown as being located inside the flange 1, and the rectangular pressure receiving portions 2 are bordered by a flat base wall 3 provided along the root portion of the flange 1. In addition, the central pressure receiving part 4 surrounded by the base wall 3 has a step wall 5 projecting to either side of the base wall 3 and a step wall 5 projecting in the same direction as the step wall 5 to a greater extent than the step wall 5 and opposing the central pressure receiving part 4. It has a reinforcing rib 7 that extends substantially in an X-shape in the corner direction and is continuous with the step wall 5 at an inclined surface 6.

Here, the boundary line between the base wall 3 and the step wall 5 is formed to be almost parallel to the base of the flange 1, but near the corner of the rectangular pressure receiving part 2, it is formed into an arc shape or a shape close to it. This is more advantageous in terms of strength. As shown in FIG. 2, the stepped wall 5 has a slightly increased height, such as 5 to 20 mm, preferably 8 to 12 mm, higher than the base wall 3. By providing the step wall 5 in this way, the rectangular pressure receiving part 2,
In particular, it becomes possible to reduce the deflection of the central pressure receiving part 4. In addition, the inclined surface 6, which has an appropriate inclination according to the protruding height of the reinforcing rib 7 and smoothly connects it to the step wall 5, reduces the stress on the boundary between the two when an external force is applied to the panel. It acts to sufficiently relieve concentration.

Further, the reinforcing ribs 7 are formed so that their height increases as they approach the intersection of the central parts of the central pressure receiving part 4, and the flat top wall 8 of the reinforcing rib 7 is formed at the intersection of the central parts of the central pressure receiving part 4. The height of the reinforcing ribs 7 is
The pressure is changed smoothly at the central intersection of the central pressure receiving portion 4. Therefore, as shown in FIG. 4, forming the reinforcing ribs 7 so that the cross-sectional shape on the diagonal line of the central pressure receiving part 4 is approximately arcuate will increase the strength of the central pressure receiving part 4, especially in the central part. This is preferable in that it increases the stress level and prevents stress concentration in the central portion.

As described above, in the present invention, the reinforcing rib 7 is provided with a flat top wall 8 in order to more effectively reduce the deflection of the central pressure receiving part 4 by the reinforcing rib 7. As shown in the figure, the width of the flat top wall 8 is made narrower as it approaches the central intersection, and accordingly, the boundary line between the inclined surface 6 and the step wall 5 can be made as close to the diagonal line of the central pressure receiving part 4 as possible. This is preferable in terms of increasing the area of the step wall 5, and this makes it easier to attach the water supply and drainage pipes to the central pressure receiving part 4.

In such panels, those in which the peripheral flange 1 is provided protruding in the same direction as the direction in which the reinforcing ribs 7 protrude as shown in FIG. 2 are used as side wall panels, and as shown in FIG. Those protruding in the direction opposite to the bulging direction of 7 are generally used for bottom walls and ceiling panels.

Further, although the panel of the present invention is most commonly used in a square panel as described above, a rectangular panel as shown in FIG. 5 also exhibits the same effect. Such rectangular panels preferably have a long side to short side ratio of 2:1 or 3:2 in consideration of efficiency when assembling the aquarium.

The panel of the present invention is constructed as described above, and has the shape shown in FIG. 2 as an example,
The effectiveness of the present invention was confirmed through a water pressure tolerance test in a water tank assembled using iron square panels with a side of 1 m and a thickness of 6 mm. As a result, the deflection and stress of the pressure-receiving surface was lower than that of a conventional rib structure panel. much smaller,
As a result, it was found that the material had sufficient strength to be used as a unit panel for a panel-type assembly aquarium with a height of 6 to 7 meters.

Therefore, according to the present invention, in particular, the step wall 5 provided in the central pressure receiving part 4 allows the central pressure receiving part 4 to
The strength of the central pressure-receiving part 4 is further increased by the reinforcing ribs 7, which are shaped like an X and have a very specific shape. The pressure resistance of the pressure rectangular panel will be significantly improved compared to the prior art.

Hereinafter, in order to further explain the features of the present invention, experimental examples will be described in detail.

In the experiment, the amount of deflection was measured using four panels.

The panel 1 used in the experiment corresponds to the present invention, and the panel 2 has approximately the same shape as the panel shown in FIG. This is a panel that is actually commercially available. Panel 3 is a commercially available product with a protrusion having a triangular cross section, and panel 4 is a flat panel.

Note that FIGS. 6, 7, and 8 schematically show the panels 1, 2, and 3 (dimensions are in mm), and the panel 4 is not particularly shown.

Experimental Example 1 In this experimental example, the deflection that occurred in each panel (for side walls) was measured when the pressure was kept constant.

In Figure 9, the vertical axis represents the amount of deflection (cm), and the horizontal axis represents the panel thickness (mm). As can be seen from this figure, the panel of the present invention shows that even if its thickness is relatively thin, it is capable of strongly resisting pressure.

Experimental Example 2 The relationship between the amount of deflection and the thickness of the panel was measured at positions A, B, C, and D of the panel when the water pressure P = 0.3 Kg/cm. The positions of A to D are plotted in FIG. 6, and the positions of the other panels are the same.

Experimental results are shown in FIGS. 10 to 13. As can be seen from these results, in the case of the invention of the present application, the amount of deflection of the panel as a whole is small, and each position is deflected relatively evenly. This is a particularly practical necessity, and other panels are significantly inferior in this respect.

As mentioned above, the panel of the present application provides a panel with low distortion and low deflection, and its superiority has been proven from the above experimental examples.

In pursuit of why the present invention has low distortion and low deflection, when water pressure is applied to a panel having X-shaped ribs, its deformation state is that the flat part bulges,
As a result of numerous experiments, it has been found that the rib portion gradually becomes higher toward the center, and that the tip of the rib portion also has a significant swell.

The panel of the present application has a shape close to this deformed state in advance, and attempts to achieve low distortion by specifying the X-shaped rib shape. By providing a stepped section, the overall rigidity is increased and the aim is to suppress deformation of the panel.

Furthermore, by gradually increasing the height of the reinforcing ribs 7 toward the central intersection of the central pressure-receiving portion 4,
If the strength of the central pressure receiving part 4, especially in the central part, can be further increased, and if the width of the flat top wall 8 is gradually narrowed toward the central intersection of the central pressure receiving part, it will be possible to further increase the strength of the central part of the central pressure receiving part 4, thereby making it easier to connect the water supply and drainage pipes to the panel. Installation can be made easy. Here, by making the reinforcing rib 7 and the stepped wall 5 continuous with the inclined surface 6, stress concentration at the boundary between the two when an external force is applied to the panel can be effectively alleviated. It will become.

[Brief explanation of the drawing]

Figure 1 is a plan view of an iron square panel as an example of the present invention, Figures 2 and 3 are cross-sectional views taken along the line FIG. 3 shows a panel with flanges facing in the direction opposite to the direction in which the reinforcing ribs protrude, FIG. A plan view of a rectangular panel of another example of the invention, FIG. 6 is panel-1 of the invention used in the experiment.
FIG. 6-1 is a plan view of 6-1- in FIG.
6-2 is a sectional view taken along line 6-1, FIG. 6 is a sectional view taken along line 6-2-6-2 in FIG. 6, and FIG. 7 is a plane view of panel 2 of the conventional product used in the experiment. Figure 7-1 is a sectional view taken along line 7-1-7-1 in Figure 7, and Figure 7-2 is a cross-sectional view taken along line 7-2-7-2 in Figure 7. Figure 8 is a plan view of the conventional panel 3 used in the experiment, Figure 8-1 is a sectional view taken along line 8-1-8-1 in Figure 8, and Figure 8-2 The figure is a cross-sectional view taken along line 8-2-8-2 in Figure 8.
The figure is a graph showing the relationship between the panel thickness and the amount of deflection showing the results of Experimental Example 1. Figure 10 is a graph showing the relationship between the panel thickness and the amount of deflection at position A of the panel showing the results of Experimental Example 2. The figure is a graph showing the relationship between the panel thickness and the amount of deflection at position B of the panel showing the results of Experimental Example 2. Figure 12 is the relationship between the panel thickness and the amount of deflection at position C of the panel showing the results of Experimental Example 2 FIG. 13 is a graph showing the relationship between the panel thickness and the amount of deflection at position D of the panel showing the results of Experimental Example 2. 1... Peripheral flange, 2... Rectangular pressure receiving part, 3...
... Base wall, 4 ... Central pressure receiving part, 5 ... Step wall, 6
... Sloped surface, 7 ... Reinforced rib, 8 ... Flat top wall.

Claims (1)

[Claims] 1. A rectangular pressure receiving part located inside the peripheral flange, a flat base wall surrounding this rectangular pressure receiving part, a central pressure receiving part surrounded by the base wall, and a base wall provided in this central pressure receiving part. A step wall protruding to one side, and a step wall that protrudes beyond the step wall and extends in an approximately X-shape in the diagonal direction of the central pressure receiving section, and its width gradually narrows toward the central intersection of the central pressure receiving section. , an iron pressure-resistant rectangular panel comprising reinforcing ribs whose height gradually increases and whose height changes smoothly in the central part.