JP4844968B2 - Blindfold panel - Google Patents

Description

  The present invention relates to a blindfold panel made of a perforated plate attached to a balcony or the like.

  In high-rise buildings, blindfold panels are attached to fences such as balconies in consideration of ventilation and blindfold. The blind panel is a perforated plate and is preferably a metal punching panel in consideration of its strength. This blindfolded panel needs to reduce wind noise and maintain blindness.

  From this point of view, the applicant of the present application has developed and filed a blindfold panel made of a punching panel (see Patent Document 1). In Patent Document 1, wind noise is generated in a blindfold panel in which a round hole-shaped through-hole is formed on a flat plate, or in a blindfold panel in which a square-shaped through-hole having four sides parallel to each side of the flat plate is formed. This has been confirmed by experiments. Therefore, Patent Document 1 discloses a blindfold panel in which rhombic through holes are formed, and it has been confirmed through experiments that no wind noise is generated in this blindfold panel.

JP 2005-90159 A

  However, in the blindfold panel of Patent Document 1, the upper and lower sides of the flat plate are set in the horizontal direction, and the left and right sides are set in the vertical direction. The cutting sound is measured. When a blindfold panel is attached to a balcony or the like, the wind is not always blown from the front of the blindfold panel, but may be blown from an oblique direction. The term “wind blows from the diagonal” means that the wind blows at an angle with respect to the vertical direction of the flat plate, with the diagonal lines of the flat plate being the horizontal and vertical directions. The blindfold panel also needs to take into account the wind noise when the wind from such an angle blows.

  FIG. 18 and FIG. 19 are graphs showing noise levels when wind is blown from an oblique direction to a blindfolded panel having a rhomboid through hole.

  The graph shows that all the through-holes in the blindfold panel have a rhombus shape obtained by rotating a 15 mm square by 45 °, and a wind with a predetermined wind speed (8m / s to 20m / s) The direction is 0 ° and the parallel direction is 90 °). In addition, W indicated by a circle in the graph indicates the generation of wind noise, and the other circles indicate background noise (laboratory sound) and do not indicate wind noise.

  As the graph shows, a wind noise that is slightly strong enough to be noticed by humans is generated except at a weak wind speed of 8 m / s. This phenomenon is because when the wind is blown from an oblique direction, the rhomboid through hole becomes a square shape with respect to the wind, so the blind hole panel of the square through hole and the characteristics against wind noise remain unchanged. It is thought that.

  FIG. 20 is a graph showing a noise level when wind is blown from an oblique direction to a rhombus shaped blindfold panel having different diagonal lengths as through holes.

  The graph shows a through-hole in the blindfolded panel with a rhombus shape with diagonals of 18 mm and 10 mm, and winds of respective wind speeds (8 m / s to 14 m / s) at a predetermined angle (0 ° perpendicular to the plate surface). The parallel direction is 90 °). Even in this case, wind noise is generated at wind speeds other than 8 m / s and 10 m / s.

  From the above, it was confirmed by experiments that the blindfold panel of Patent Document 1 is not preferable because wind noise is generated when wind blows from an oblique direction.

  The present invention takes the above-mentioned prior art into consideration, and an object thereof is to provide a blindfold panel that reduces wind noise while maintaining the blindness.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a blindfold panel in which a large number of through holes penetrating the flat plate are formed over the entire surface of the rectangular flat plate, and the through holes are formed on the flat plates. A square hole having four sides parallel to the side and a rhomboid hole obtained by rotating the square hole by 45 °. The square hole and the rhomboid hole are arranged in a vertical direction and a horizontal direction parallel to each side of the flat plate, respectively. A blindfold panel is provided in which the square holes and the rhombus holes are alternately formed in an oblique lattice shape inclined by 45 ° with respect to each side of the flat plate.

  The invention according to claim 2 is characterized in that the outermost rows of columns and rows formed by the through holes in the flat plate are columns and rows of the rhomboid holes.

  The invention of claim 3 is characterized in that, in the invention of claim 1, the through hole is 15 mm to 25 mm square, and the distance between the adjacent rhomboid holes is 25.78 mm to 42.94 mm.

  According to the first aspect of the present invention, it is possible to ensure the air permeability from the through-hole while maintaining the blindfold, and the blindfold that does not generate wind noise that is anxious for the human being no matter which direction the wind blows. You can get a panel.

  According to the second aspect of the invention, the outermost row of columns and rows formed by the through holes are the rows and rows of rhombic holes, so that air permeability from the through holes can be ensured while maintaining blindness. Furthermore, it is possible to obtain a blindfold panel that does not generate a wind noise that is anxious to the person no matter which direction the wind blows.

  According to invention of Claim 3, a through-hole is 15 mm-25 mm square, and the distance between the said adjacent rhombic holes is 25.78 mm-42.94 mm, By maintaining blinding property, it is from a through-hole. Ventilation can be ensured, and a blindfold panel can be obtained in which wind noise that is anxious to human beings is not generated no matter which direction the wind blows.

  The present invention relates to a blindfold panel in which a large number of through holes penetrating the flat plate are formed over the entire surface of the rectangular flat plate, and the through hole is a square hole having four sides parallel to each side of the flat plate. And a square hole obtained by rotating the square hole by 45 °, and the square hole and the diamond hole are formed at equal intervals in rows in the vertical and horizontal directions parallel to the sides of the flat plate, respectively. Since the square holes and the rhomboid holes alternately form an oblique lattice shape inclined by 45 ° with respect to each side of the flat plate, the air permeability from the through holes can be secured while maintaining the blindness, and further the wind This is a blindfold panel that does not generate wind noise from any direction.

  FIG. 1 is a schematic configuration diagram of a first embodiment of a blindfold panel according to the present invention, (A) is a front view of the blindfold panel, and (B) is an enlarged view showing a positional relationship of through holes.

  As shown to (A), the blindfold panel 1 of this invention is formed by drilling many through-holes 3 in the flat plate 2 made from metal. That is, the flat plate 2 is a perforated plate. The through hole 3 includes a square hole 5 having four sides parallel to the outer periphery of the flat plate 2 and a rhombus hole 4 obtained by rotating the square hole by 45 °. The square holes 5 and the diamond-shaped holes 4 are arranged at equal intervals in parallel to each side of the flat plate 2 to form rows (columns and rows). The columns and rows of the rhomboid holes 4 and the square holes 5 are formed alternately. At this time, the square hole 5 is formed at the center of the vertical and horizontal rows of the rhomboid holes 4. That is, the square holes 5 and the rhombic holes 4 are alternately formed in an oblique lattice shape inclined by 45 ° with respect to each side of the flat plate 2. Further, the outermost rows of the through holes 3 in the vertical and horizontal rows, that is, the rows closest to the respective sides of the flat plate 2 are rows of rhombus holes. In addition, the rhombus hole 4 may be slightly deviated from 45 ° with respect to the square hole 5, or the size of the hole may be different.

  2 to 10 are graphs showing the noise level of the blindfold panel according to the present invention. FIG. 11 is a schematic configuration diagram showing a state when the noise level of the blindfold panel according to the present invention is measured.

  The measurement state of FIG. 11 will be described first. When the flat plate 2 is set up vertically and the wind is blown from the side, the angle is 0 °, and when flat plate 2 is laid horizontally and the wind is blown from the side, the angle is 90 °. And 45 ° between them. This measurement method is commonly used for the measurement of the noise level of the blindfolded panel of Example 1 and Example 2 shown below.

  2 and 3 are arranged so that each side of the flat plate 2 (see FIG. 1) is in the horizontal and vertical directions, and a wind having a predetermined wind speed (8 m / s to 20 m / s) is applied at a predetermined angle (flat plate). The vertical direction is 0 ° and the parallel direction is 90 ° with respect to the surface. That is, wind is blown from the front when the rectangular flat plate 2 is attached to a balcony or the like. Further, the flat plate 2 is a square of 800 mm square, the through hole 3 (see FIG. 1) is a square of 15 mm square, and the distance D (see FIG. 1 (B)) between the adjacent rhomboid holes 4 is 25.78 mm.

  In addition, as a common matter in the following graphs, W indicated by a circle in the graph indicates the occurrence of wind noise, and other circles indicate background noise (sound in the laboratory). It does not indicate.

  As shown in the graph of FIG. 2, at an angle of 0 °, generation of wind noise is not confirmed at any wind speed. As shown in the graph of FIG. 3, when blowing at an angle, the generation of wind noise is confirmed in the graphs (A) to (H). It is the sound that is not worried about. The sound that the person does not care is that the increase in the sound pressure level is 15 dB or less.

  4 and 5 use the same blindfolded panel as in FIGS. 2 and 3, and are arranged so that the diagonal lines of the flat plate are in the horizontal and vertical directions, and have a predetermined wind speed (8 m / s to 20 m / s). The wind is blown from a predetermined angle (the vertical direction with respect to the flat plate surface is 0 ° and the parallel direction is 90 °). That is, when the rectangular flat plate 2 is attached to a balcony or the like, wind is blown from an oblique direction.

  As shown in the graph of FIG. 4, at an angle of 0 °, generation of wind noise is not confirmed at any wind speed. As shown in the graph of FIG. 5, in the case of blowing at an angle, in the case of (A) (wind speed 14 m / s, angle 69 °), generation of wind noise is confirmed. Wind noise is a sound that does not bother people.

  6 to 8 are arranged so that each side of the flat plate 2 (see FIG. 1) is in the horizontal and vertical directions, and a wind having a predetermined wind speed (6 m / s to 20 m / s) is applied to a predetermined angle (flat plate). The vertical direction is 0 ° and the parallel direction is 90 ° with respect to the surface. Further, the flat plate 2 is a square of 800 mm square, the through hole 3 (see FIG. 1) is a square of 25 mm square, and the distance D (see FIG. 1 (B)) between the adjacent rhomboid holes 4 is 42.94 mm.

  As shown in the graphs of FIGS. 6 and 7A, no wind noise is observed at any wind speed at an angle of 0 °. As shown in the graphs of FIGS. 7 (B) to (G) and FIG. 8, when sprayed at an angle, FIGS. 7 (C) to (G) and FIGS. 8 (A) to (F). In this case, the generation of wind noise is confirmed, but this wind noise is a sound that does not bother people.

  9 and 10 use the same blindfolded panels as in FIGS. 6 to 8 and are arranged so that each diagonal line of the flat plate is in the horizontal and vertical directions, and have a predetermined wind speed (7 m / s to 20 m / s). The wind is blown from a predetermined angle (the vertical direction with respect to the flat plate surface is 0 ° and the parallel direction is 90 °).

  As shown in the graph of FIG. 9, the generation of wind noise is not confirmed at an angle of 0 °. As shown in the graph of FIG. 10, when blowing at an angle, in the cases (C) to (E), generation of wind noise is confirmed. It is a sound that is not worrisome.

  According to the above experiment, the blindfold panel according to the present invention shows that the wind noise is reduced, and only the wind noise that is not noticeable by humans is generated. The aperture ratio of the blindfold panel when the through hole 3 used in FIGS. 2 to 5 is 15 mm square is about 19.2%, and when the through hole 3 used in FIGS. Since the aperture ratio of the blindfold panel is about 17.7%, the aperture ratio is optimal for ensuring the blindfoldability and ventilation. Therefore, the blindfolded panel according to the present invention can ensure the ventilation through the through-hole while maintaining the blindfold, and further, no wind noise is generated that is anxious to the person no matter which direction the wind blows. The wind noise is reduced compared to the prior art. This is because the blindfold panel 1 according to the present invention disturbs the wind so as not to generate wind noise when the wind blows from an oblique direction due to the shape and arrangement of the through holes 3.

  12A and 12B are schematic configuration diagrams of a blindfold panel according to Embodiment 2 of the present invention, in which FIG. 12A is a front view of the blindfold panel, and FIG. 12B is an enlarged view showing a positional relationship of through holes.

  As shown to (A), the blindfold panel 6 of a present Example is formed by drilling many through-holes 3 in the metal flat plate 2. As shown in FIG. The through hole 3 includes a square hole 5 having four sides parallel to each side of the flat plate 2 and a rhombus hole 4 obtained by rotating the square hole by 45 °. The square holes 5 and the diamond-shaped holes 4 are arranged at equal intervals in parallel to each side of the flat plate 2 to form rows (columns and rows). The rows of the rhomboid holes 4 and the square holes 5 are formed alternately. At this time, the rhomboid hole 4 is formed at the center of the vertical and horizontal rows of the square holes 5. That is, the square holes 5 and the rhombus holes 4 are alternately arranged to form the oblique grid-like blindfold panel 1. Further, the outermost rows of the through holes 3 in the vertical and horizontal rows, that is, the rows closest to each side of the flat plate 2 are rows of square holes.

  In other words, in the blindfold panel 6 of this embodiment, the outermost rows of the through holes 3 in the blindfold panel 1 (see FIG. 1) of the first embodiment, that is, the nearest row of each side of the flat plate 2 are diamond-shaped. The holes 4 are replaced with the rows of square holes 5, and the diamond holes 4 and the square holes 5 are formed alternately. That is, in the blindfold panel 6 of this embodiment, the positions of the square holes 5 and the diamond holes 4 of the blindfold panel 1 of Embodiment 1 are reversed.

  13 to 17 are graphs showing the noise level of another blindfold panel according to the present invention.

  FIGS. 13 and 14 are arranged so that each side of the flat plate 2 (see FIG. 11) is in the horizontal and vertical directions, and a wind having a predetermined wind speed (8 m / s to 20 m / s) is applied to a predetermined angle (flat plate). The vertical direction is 0 ° and the parallel direction is 90 ° with respect to the surface. That is, wind is blown from the front when the rectangular flat plate 2 is attached to a balcony or the like. In addition, the flat plate 2 is a square of 800 mm square, the through hole 3 (see FIG. 12) is a 15 mm square, and the distance E between adjacent square holes 5 (see FIG. 12B) is: 32 mm.

  As shown in the graph of FIG. 13, at an angle of 0 °, generation of wind noise is not confirmed at any wind speed. As shown in the graph of FIG. 14, when blowing at an angle, in the cases (A) to (G), generation of wind noise is confirmed. It is a sound that is not worrisome.

  15 to 17 are arranged so that each side of the flat plate 2 (see FIG. 12) is in the horizontal and vertical directions, and a wind having a predetermined wind speed (6 m / s to 20 m / s) is applied to a predetermined angle (flat plate). The vertical direction is 0 ° and the parallel direction is 90 ° with respect to the surface. That is, wind is blown from the front when the rectangular flat plate 2 is attached to a balcony or the like. The flat plate 2 has a square of 800 mm square, the through hole 3 (see FIG. 12) is a square of 25 mm square, and the distance E (see FIG. 12B) between the adjacent square holes 4 is 53. .3 mm.

  As shown in the graphs of FIGS. 15 to 17, no wind noise is observed at any wind speed at an angle of 0 °. As shown in the graphs of FIGS. 16 and 17, when blowing at an angle, wind noise is generated in the cases of FIGS. 16 (A) to (E) and FIGS. 17 (A) to (F). However, this wind noise is a sound that does not bother people.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of Example 1 of the blindfold panel which concerns on this invention, (A) is a front view of a blindfold panel, (B) is an enlarged view which shows the positional relationship of a through-hole. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a graph which shows the noise level of the blindfold panel which concerns on this invention. It is a schematic block diagram which shows a state when measuring the noise level of the blindfold panel which concerns on this invention. It is a schematic block diagram of Example 2 of the blindfold panel which concerns on this invention, (A) is a front view of a blindfold panel, (B) is an enlarged view which shows the positional relationship of a through-hole. It is a graph which shows the noise level of another blindfold panel which concerns on this invention. It is a graph which shows the noise level of another blindfold panel which concerns on this invention. It is a graph which shows the noise level of another blindfold panel which concerns on this invention. It is a graph which shows the noise level of another blindfold panel which concerns on this invention. It is a graph which shows the noise level of another blindfold panel which concerns on this invention. It is a graph which shows a noise level when a wind is blown from the diagonal direction with respect to the blindfold panel whose through-hole is a rhombus shape. It is a graph which shows a noise level when a wind is blown from the diagonal direction with respect to the blindfold panel whose through-hole is a rhombus shape. It is a graph which shows a noise level when a wind is blown from the diagonal direction with respect to the rhombus-shaped blindfold panel from which the length of a diagonal line differs as a through-hole.

Explanation of symbols

1: Blindfold panel, 2: Flat plate, 3: Through hole, 4: Diamond hole, 5: Square hole, 6: Blindfold panel

Claims (3)

A blindfold panel in which a large number of through holes penetrating the flat plate are formed over the entire surface of the rectangular flat plate,
The through hole is composed of a square hole having four sides parallel to each side of the flat plate and a rhombus hole obtained by rotating the square hole by 45 °.
The square holes and rhomboid holes are formed at equal intervals in rows in the vertical and horizontal directions parallel to the sides of the flat plate, respectively.
The blindfold panel, wherein the square holes and the rhomboid holes alternately form an oblique lattice shape inclined by 45 ° with respect to each side of the flat plate.   2. The blindfold panel according to claim 1, wherein outermost rows of columns and rows formed by the through holes in the flat plate are columns and rows of the rhombic holes. 3. The blindfold panel according to claim 1, wherein the through hole is 15 mm to 25 mm square, and a distance between the adjacent rhomboid holes is 25.78 mm to 42.94 mm.

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