本発明は、フィードバック発振音の発生防止機能を備えた可動ルーバー装置に関する。
The present invention relates to a movable louver device having a function of preventing generation of feedback oscillation sound.
固定のルーバフィンの風上縁部や風下縁部に縁板や円柱状物体のような風切り騒音防止部を備えたルーバー装置（例えば、特許文献１乃至３など参照）や、回転可能な複数の回転羽根を備えた可動ルーバー装置（例えば、特許文献４など参照）が知られている。
A louver device (see, for example, Patent Documents 1 to 3) including a wind noise prevention unit such as an edge plate or a cylindrical object at the windward edge or leeward edge of a fixed louver fin, or a plurality of rotatable rotations 2. Description of the Related Art A movable louver device having blades (see, for example, Patent Document 4) is known.
図９乃至図１１を参照し、可動ルーバー装置の基本構造の一例を説明する。可動ルーバー装置１は、ルーバー枠２と、複数の回転羽根３と、回転羽根３の回転支持部４、複数の回転羽根３を連動して回転可能とする連結機構５と、風流に対する回転羽根３の表面８ａや裏面８ｂの傾斜角度を所定の角度に固定するための角度設定手段１５とを備える。
ルーバー枠２は例えば四角形枠に形成される。四角形枠は、上下に対向する一対の横桟６と左右に対向する一対の縦桟７とを備える。回転羽根３は、長尺な板に形成される。回転羽根３の長辺の長さは一対の縦桟７間の寸法に対応した長さに形成される。
回転羽根３は、例えば、長辺の長さ寸法が７００ｍｍ、短辺の長さ寸法が５０ｍｍ、板の厚さ寸法が１０ｍｍの横長６の板材により形成される。
横方向に長尺な横長の回転羽根３は、回転羽根３の両方の端面１０としての右側端面１０ａ及び左側端面１０ｂよりそれぞれ突出するように設けられた回転中心軸１１がルーバー枠２の左右の縦桟７に回転自在に取付けられる。ルーバー枠２の左右の縦桟７に回転自在に取付けられる複数の回転羽根３は、互いに縦方向に隣り合うように並べられて設けられる。
回転羽根３の回転支持部４は、回転羽根３の右側端面１０ａ及び左側端面１０ｂより突出する回転中心軸１１を回転可能に支持するために縦桟７の内側板７Ｘ（図１１参照）に設けられた軸受穴により形成される。
連結機構５は、例えば、一対の縦桟７のうちの一方の縦桟７ａの内側に設けられる。連結機構５は、回転羽根３の回転中心軸１１に連結されて回転中心軸１１の回転に伴って回転中心軸１１を回転中心として回転する翼片２０と、上下に隣り合う複数の回転羽根３の翼片２０の端部２１同士を繋いで上下に隣り合う複数の回転羽根３の翼片２０を連動させて回転させる連結体２２とを備える。
回転羽根３の角度設定手段１５（図１１参照）は、例えば、縦桟７の内側板７Ｘを貫通する複数の貫通孔であって回転中心軸１１を中心とする円の軌跡上に形成された複数の停止ピン挿入孔１２と、回転羽根に連結されて縦桟７の方向に進退自在で任意の１つの停止ピン挿入孔１２に出し入れ可能に形成された停止ピン１３とにより形成される。
回転羽根３としては、例えば、長辺７００ｍｍ×短辺５０ｍｍの長方形の面により形成された風遮蔽面８を形成する表面８ａ及び裏面８ｂ、長辺７００ｍｍ×厚さ１０ｍｍの長方形の面により形成された両方の縁面９としての上縁面９ａ及び下縁面９ｂ、短辺５０ｍｍ×厚さ寸法１０ｍｍの長方形の面により形成された両方の端面１０としての左側端面１０ａ及び右側端面１０ｂを備えたものが知られている。図１０に示すように、回転中心軸１１を回転中心として回転羽根３を回転させ、上下方向に隣り合う回転羽根３の表面８ａと裏面８ｂとが重なり合うように回転羽根３の回転角度が設定された場合、上下方向に隣り合う複数の回転羽根３の表面８ａ及び裏面８ｂが風遮蔽面８を形成する。上下方向に隣り合う回転羽根３の表面８ａと裏面８ｂとが重ならないように回転羽根３の回転角度が設定された場合、上下方向に隣り合う回転羽根３と回転羽根３との間に風の通過を許容する通路Ｓが形成される。
即ち、可動ルーバー装置１は、複数の回転羽根３を備え、回転羽根３は、風遮蔽面８を形成する表面８ａ及び裏面８ｂと、表面８ａと裏面８ｂとを繋ぐとともに回転支持部４によって回転可能に支持される回転中心軸１１を有した両方の端面１０としての左側端面１０ａ及び右側端面１０ｂと、表面８ａと裏面８ｂとを繋ぐとともに回転羽根３の回転中心に沿った面により形成された両方の縁面９としての上縁面９ａ及び下縁面９ｂとを備え、複数の回転羽根３の縁面９同士が互いに隣り合うように複数の回転羽根３が上下方向（一方向）に並べられて設けられた構成である。
尚、図１０に示した回転羽根３の厚さ寸法ｂが小さい場合には、風遮蔽面８を平面に形成することが可能である。
An example of the basic structure of the movable louver device will be described with reference to FIGS. The movable louver device 1 includes a louver frame 2, a plurality of rotating blades 3, a rotation support portion 4 of the rotating blades 3, a coupling mechanism 5 that allows the plurality of rotating blades 3 to rotate in conjunction with each other, and a rotating blade 3 against wind current. Angle setting means 15 for fixing the inclination angle of the front surface 8a and the back surface 8b to a predetermined angle.
The louver frame 2 is formed in a square frame, for example. The quadrangular frame includes a pair of horizontal rails 6 facing up and down and a pair of vertical rails 7 facing left and right. The rotary blade 3 is formed in a long plate. The long side of the rotary blade 3 is formed to have a length corresponding to the dimension between the pair of vertical bars 7.
The rotary blade 3 is formed of, for example, a horizontally long 6 plate material having a long side length dimension of 700 mm, a short side length dimension of 50 mm, and a plate thickness dimension of 10 mm.
The horizontally long rotating blades 3 that are long in the horizontal direction have rotation center shafts 11 provided so as to protrude from the right end surface 10 a and the left end surface 10 b as both end surfaces 10 of the rotating blades 3. It is rotatably attached to the vertical beam 7. The plurality of rotary blades 3 that are rotatably attached to the left and right vertical bars 7 of the louver frame 2 are provided so as to be adjacent to each other in the vertical direction.
The rotation support portion 4 of the rotary blade 3 is provided on the inner plate 7X (see FIG. 11) of the vertical rail 7 in order to rotatably support the rotation center shaft 11 protruding from the right end surface 10a and the left end surface 10b of the rotary blade 3. Formed by the bearing hole formed.
The coupling mechanism 5 is provided, for example, inside one vertical rail 7a of the pair of vertical rails 7. The coupling mechanism 5 is connected to the rotation center shaft 11 of the rotary blade 3 and rotates with the rotation center shaft 11 as the rotation center as the rotation center shaft 11 rotates, and a plurality of adjacent rotary blades 3. A connecting body 22 that connects the end portions 21 of the blade blades 20 and rotates the blade blades 20 of the plurality of blades 3 adjacent to each other vertically.
The angle setting means 15 (see FIG. 11) of the rotary blade 3 is formed on a circular trajectory that is a plurality of through-holes that penetrate the inner plate 7X of the vertical rail 7 and that has the rotation center axis 11 as a center. It is formed by a plurality of stop pin insertion holes 12 and a stop pin 13 that is connected to a rotary blade and is movable forward and backward in the direction of the longitudinal rail 7 and can be inserted into and removed from any one stop pin insertion hole 12.
The rotary blade 3 is formed of, for example, a front surface 8a and a rear surface 8b that form a wind shielding surface 8 formed by a rectangular surface having a long side of 700 mm × a short side of 50 mm, and a rectangular surface having a long side of 700 mm × thickness of 10 mm. The upper edge surface 9a and the lower edge surface 9b as both edge surfaces 9 and the left end surface 10a and the right end surface 10b as both end surfaces 10 formed by rectangular surfaces having a short side of 50 mm × thickness of 10 mm are provided. Things are known. As shown in FIG. 10, the rotation blade 3 is rotated about the rotation center shaft 11 as a rotation center, and the rotation angle of the rotation blade 3 is set so that the front surface 8a and the back surface 8b of the rotation blade 3 adjacent in the vertical direction overlap. In this case, the front surface 8 a and the back surface 8 b of the plurality of rotary blades 3 adjacent in the vertical direction form the wind shielding surface 8. When the rotation angle of the rotary blade 3 is set so that the front surface 8a and the back surface 8b of the rotary blade 3 adjacent to each other in the vertical direction do not overlap, the wind between the rotary blade 3 and the rotary blade 3 adjacent to each other in the vertical direction A passage S that allows passage is formed.
That is, the movable louver device 1 includes a plurality of rotating blades 3, and the rotating blades 3 connect the front surface 8 a and the back surface 8 b forming the wind shielding surface 8 and the front surface 8 a and the back surface 8 b and rotate by the rotation support unit 4. The left end face 10a and the right end face 10b as both end faces 10 having the rotation center shaft 11 supported so as to be connected to the front face 8a and the rear face 8b and the face along the rotation center of the rotary blade 3 are formed. A plurality of rotating blades 3 are arranged in the vertical direction (one direction) so that both edge surfaces 9 are provided with an upper edge surface 9a and a lower edge surface 9b, and the edge surfaces 9 of the plurality of rotating blades 3 are adjacent to each other. It is the structure provided.
In addition, when the thickness dimension b of the rotary blade 3 shown in FIG. 10 is small, the wind shielding surface 8 can be formed in a plane.
図１２に示すように、回転羽根３としては、回転羽根３の回転中心に沿った面により形成された両方の縁面９としての上縁面９ａ及び下縁面９ｂに、それぞれ凹凸係合部１６を備えたものも知られている。即ち、表面８ａ側の一方の縁部である上縁部が凸部１６ａとして形成されるとともに裏面８ｂ側の一方の縁部である上縁部が凹部１６ｂとして形成され、表面８ａ側の他方の縁部である下縁部が凹部１６ｂとして形成されるとともに裏面８ｂ側の他方の縁部である下縁部が凸部１６ａとして形成された形態である。図１２（ａ）に示すように、回転中心軸１１を回転中心として回転羽根３を回転させ、上下に並ぶ上の回転羽根３の下縁部の凹凸係合部１６と下の回転羽根３の上縁部の凹凸係合部１６とが係合して表面８ａと裏面８ｂとで風遮蔽面８が形成され、図１２（ｂ）に示すように、上下に並ぶ回転羽根３；３の凹凸係合部１６；１６の係合が解除された場合に上下方向に隣り合う回転羽根３と回転羽根３との間に風の通過を許容する通路Ｓが形成される。
尚、凹凸係合部１６の凸部１６ａの厚さ寸法ｘと凹部１６ｂの厚さ寸法ｙとを同じにし、かつ、凸部１６ａの高さ寸法ｅと凹部１６ｂの深さ寸法ｆとを同じにすれば、上下の回転羽根３間の隙間が小さくかつ平坦な風遮蔽面８を形成できる。
As shown in FIG. 12, as the rotary blade 3, the concave and convex engaging portions are respectively formed on the upper edge surface 9 a and the lower edge surface 9 b as both edge surfaces 9 formed by the surface along the rotation center of the rotary blade 3. Those with 16 are also known. That is, the upper edge, which is one edge on the surface 8a side, is formed as a convex part 16a, and the upper edge, which is one edge on the back surface 8b side, is formed as a concave part 16b, and the other edge on the surface 8a side is formed. The lower edge part which is an edge part is formed as the recessed part 16b, and the lower edge part which is the other edge part by the side of the back surface 8b is formed as the convex part 16a. As shown in FIG. 12A, the rotary blade 3 is rotated about the rotation center shaft 11 as a rotation center, and the concave and convex engaging portions 16 on the lower edge of the upper rotary blade 3 aligned vertically and the lower rotary blade 3 are aligned. A wind shielding surface 8 is formed by the front surface 8a and the back surface 8b by engaging with the concave / convex engaging portion 16 at the upper edge, and the concave / convex portions of the rotating blades 3; A passage S that allows passage of wind is formed between the rotary blades 3 adjacent to each other in the vertical direction when the engagement of the engaging portions 16; 16 is released.
In addition, the thickness dimension x of the convex part 16a of the concave-convex engaging part 16 and the thickness dimension y of the concave part 16b are made the same, and the height dimension e of the convex part 16a and the depth dimension f of the concave part 16b are made the same. If it makes it, the clearance gap between the upper and lower rotary blades 3 is small, and the flat wind-shielding surface 8 can be formed.
図１３に示すように、回転羽根３としては、回転羽根３の回転中心に沿った面により形成された両方の縁面９としての上縁面９ａ及び下縁面９ｂに、それぞれ係合凹部１７；１７を備えたものも知られている。即ち、回転羽根３の一方の縁部である上縁部には裏面８ｂ側に開口する裏凹部１７ａが形成されるとともに、回転羽根３の他方の縁部である下縁部には表面８ａ側に開口する表凹部１７ｂが形成された形態である。裏凹部１７ａは、回転羽根３の一方の縁部である上縁部において、表面８ａに沿って上方に延長する延長片１８ａと、延長片１８ａの先端より裏面８ｂ側に垂直に延長する水平片１８ｂと、上縁面９ａとで区画された凹部により形成される。表凹部１７ｂは、回転羽根３の他方の縁部である下縁部において、裏面８ｂに沿って下方に延長する延長片１８ｃと、延長片１８ｃの先端より表面８ａ側に垂直に延長する水平片１８ｄと、下縁面９ｂとで区画された凹部により形成される。図１３（ａ）に示すように、回転中心軸１１を回転中心として回転羽根３を回転させ、上下に並ぶ回転羽根３；３の水平片１８ｂと凹部１７ｂ及び水平片１８ｄと凹部１７ａとが係合しあった場合に表面８ａと裏面８ｂとで風遮蔽面８が形成され、図１３（ｂ）に示すように、上下に並ぶ回転羽根３；３の水平片と凹部との係合が解除された場合に上下方向に隣り合う回転羽根３と回転羽根３との間に風の通過を許容する通路Ｓが形成される。
尚、係合凹部１７は、延長片１８ａ（１８ｃ）と水平片１８ｂ（１８ｄ）とを備えた断面Ｌ字状の長尺材を後付けして形成することで回転羽根３の製造コストを低減できる。
特開平７−２３８６４９号公報
特開２００１−１７３３２６号公報
特開２００７−２３６３８号公報
特開２００７−４００１６号公報
As shown in FIG. 13, as the rotary blade 3, the engaging recess 17 is formed on each of the upper edge surface 9 a and the lower edge surface 9 b as both edge surfaces 9 formed by the surface along the rotation center of the rotary blade 3. One with 17 is also known. That is, a back concave portion 17a that opens to the back surface 8b side is formed on the upper edge portion that is one edge portion of the rotary blade 3, and the lower edge portion that is the other edge portion of the rotary blade 3 is on the front surface 8a side. This is a form in which a front recess 17b is formed. The back recess 17a includes an extension piece 18a extending upward along the surface 8a at the upper edge, which is one edge of the rotary blade 3, and a horizontal piece extending vertically from the tip of the extension piece 18a toward the back surface 8b. It is formed by a recess defined by 18b and the upper edge surface 9a. The front concave portion 17b includes an extension piece 18c extending downward along the back surface 8b at the lower edge portion, which is the other edge portion of the rotary blade 3, and a horizontal piece extending vertically from the tip of the extension piece 18c to the surface 8a side. It is formed by a recess defined by 18d and the lower edge surface 9b. As shown in FIG. 13 (a), the rotary blade 3 is rotated about the rotation center shaft 11 as a rotation center, and the horizontal piece 18b and the concave portion 17b and the horizontal piece 18d and the concave portion 17a of the rotary blade 3; When they are combined, the wind shielding surface 8 is formed by the front surface 8a and the back surface 8b, and as shown in FIG. 13B, the engagement between the horizontal pieces of the rotating blades 3; In this case, a passage S that allows passage of wind is formed between the rotary blades 3 adjacent to each other in the vertical direction.
In addition, the manufacturing cost of the rotary blade 3 can be reduced by forming the engagement recess 17 by retrofitting a long material having an L-shaped cross section including the extension piece 18a (18c) and the horizontal piece 18b (18d). .
JP-A-7-238649 JP 2001-173326 A JP 2007-23638 A JP 2007-40016 A
図１０に示した従来の可動ルーバー装置１の回転羽根３の場合、例えば、図１４に示すように、風Ｆの流れる方向と回転羽根３の互いに平行な表面８ａ及び裏面８ｂとのなす角度αが６０°の場合において、風Ｆが表面８ａと下縁面９ｂ（縁面９）との境界である角部（エッジ）８ｔに衝突して渦Ｆ１を作り、この渦Ｆ１が表面８ａに衝突して音を発生させるとともに、ここで発生する圧力波Ｆ２が角部８ｔに伝播して次の渦を作るという現象が周期的に繰り返されることによって、いわゆる、フィードバック発振音（風切り音）が発生するという問題点があった。
図１２に示した従来の可動ルーバー装置１の回転羽根３の場合、例えば、図１５に示すように、風Ｆの流れる方向と回転羽根３の互いに平行な表面８ａ及び裏面８ｂとのなす角度αが３０°の場合において、風Ｆが凹凸係合部１６の凸部１６ａと凹部１６ｂとの境界である角部（エッジ）１６ｔに衝突して渦Ｆ１を作り、この渦Ｆ１が凹部１６ｂの壁に衝突して音を発生させるとともに、ここで発生する圧力波Ｆ２が角部１６ｔに伝播して次の渦を作るという現象が周期的に繰り返されることによって、いわゆる、フィードバック発振が発生するという問題点があった。
図１３に示した従来の可動ルーバー装置１の回転羽根３の場合、例えば、図１６に示すように、風Ｆの流れる方向と回転羽根３の互いに平行な表面８ａ及び裏面８ｂとが平行又は平行に近い状態となった場合において、風Ｆが係合片１８ｂ（１８ｄ）の先端の角部（エッジ）１８ｔに衝突して渦Ｆ１を作り、この渦Ｆ１が下流の縁面９の角部９ｃに衝突して音を発生させるとともに、ここで発生する圧力波Ｆ２が上流に伝播して次の渦を作るという現象が周期的に繰り返されることによって、いわゆる、フィードバック発振音が発生するという問題点があった。
そこで、本発明は、フィードバック発振音の発生を効果的に防止可能な可動ルーバー装置を提供する。
In the case of the rotary blade 3 of the conventional movable louver device 1 shown in FIG. 10, for example, as shown in FIG. 14, the angle α formed between the direction in which the wind F flows and the front surface 8a and the back surface 8b of the rotary blade 3 parallel to each other. Is 60 °, the wind F collides with a corner (edge) 8t which is a boundary between the surface 8a and the lower edge surface 9b (edge surface 9) to form a vortex F1, and this vortex F1 collides with the surface 8a. In addition to generating sound, the phenomenon that the pressure wave F2 generated here propagates to the corner 8t and creates the next vortex is periodically repeated, so-called feedback oscillation sound (wind noise) is generated. There was a problem of doing.
In the case of the rotary blade 3 of the conventional movable louver device 1 shown in FIG. 12, for example, as shown in FIG. 15, the angle α formed between the direction in which the wind F flows and the front surface 8a and the back surface 8b of the rotary blade 3 parallel to each other. Is 30 °, the wind F collides with a corner (edge) 16t which is the boundary between the convex portion 16a and the concave portion 16b of the concave-convex engaging portion 16 to form a vortex F1, and this vortex F1 is the wall of the concave portion 16b. The phenomenon that the so-called feedback oscillation is generated by the phenomenon that the pressure wave F2 generated here propagates to the corner portion 16t and creates the next vortex is periodically repeated. There was a point.
In the case of the rotating blade 3 of the conventional movable louver device 1 shown in FIG. 13, for example, as shown in FIG. 16, the direction in which the wind F flows and the surface 8a and the back surface 8b parallel to each other are parallel or parallel. When the wind F approaches the corner 18c of the engagement piece 18b (18d), the vortex F1 is created by colliding with the corner 18c of the engagement piece 18b (18d), and this vortex F1 is the corner 9c of the downstream edge surface 9. The phenomenon that the so-called feedback oscillation sound is generated by the phenomenon that the pressure wave F2 generated here propagates upstream and creates the next vortex is periodically repeated. was there.
Therefore, the present invention provides a movable louver device that can effectively prevent the generation of feedback oscillation sound.
本発明に係る可動ルーバー装置は、複数の回転羽根を備え、回転羽根は、風遮蔽面を形成する表面及び裏面と、表面と裏面とを繋ぐとともに回転支持部によって枠に回転可能に支持される回転中心軸を有した両方の端面と、表面と裏面とを繋ぐとともに回転羽根の回転中心に沿った面により形成された両方の縁面とを備え、複数の回転羽根の縁面同士が互いに隣り合うように複数の回転羽根が一方向に並べられて設けられた可動ルーバー装置において、回転羽根が、表面及び裏面のうちの少なくとも一方の面に、点在する凸部を備えたことを特徴とする。
大きさの異なる凸部を設けたことも特徴とする。
The movable louver device according to the present invention includes a plurality of rotating blades, and the rotating blades connect the front surface and the back surface forming the wind shielding surface, the front surface and the back surface, and are rotatably supported by the rotation support portion. Both end surfaces having a rotation center axis and both edge surfaces formed by surfaces along the rotation center of the rotating blades that connect the front surface and the back surface, and the edge surfaces of the plurality of rotating blades are adjacent to each other. In the movable louver device provided with a plurality of rotating blades arranged in one direction so as to fit with each other, the rotating blades are provided with dotted projections on at least one of the front surface and the back surface. To do.
It is also characterized by providing convex portions having different sizes.
本発明の可動ルーバー装置によれば、風の流れが凸部により不規則に乱れやすくなり、フィードバック発振音の発生原因となる周期的な渦の発生を防止できるので、フィードバック発振音の発生を効果的に防止できる。
大きさの異なる凸部を設けた場合には、大きさの異なる凸部により風の流れがさらに不規則に乱れやすくなり、周期的な渦の発生を防止できるので、フィードバック発振音の発生を効果的に防止できる。
According to the movable louver device of the present invention, the flow of the wind is likely to be irregularly disturbed by the convex portion, and the generation of the periodic vortex that causes the generation of the feedback oscillation sound can be prevented. Can be prevented.
When convex portions with different sizes are provided, the flow of wind is more likely to be irregularly disturbed by the convex portions with different sizes, and the generation of periodic vortices can be prevented. Can be prevented.
最良の形態１．
図１乃至図４は最良の形態１を示す。図１（ａ）は可動ルーバー装置の回転羽根が風を遮蔽する状態に設定された場合を示し、図１（ｂ）は可動ルーバー装置の回転羽根が回転羽根間に風の通過を許容する通路を形成した状態に設定された場合を示し、図１（ｃ）は凸部形成体３５の側面を示し、図１（ｄ）は凸部形成体３５の底面を示す。図２は実験により得た最良の形態１の可動ルーバー装置による音発生レベルと従来の可動ルーバー装置による音発生レベルとの差である相対音圧レベル差を示したグラフである。図３は最良の形態１の可動ルーバー装置の回転羽根及び従来の可動ルーバー装置の回転羽根の実験条件を示す。図４は回転羽根の表面（裏面）を示す。尚、図９乃至図１６に示した従来例と同一部分については同一符号を付してその説明を省略する。
Best Mode
1 to 4 show the best mode 1. FIG. FIG. 1A shows a case where the rotating blades of the movable louver device are set to shield the wind, and FIG. 1B shows a passage where the rotating blades of the movable louver device allow the passage of wind between the rotating blades. 1 (c) shows the side surface of the convex portion forming body 35, and FIG. 1 (d) shows the bottom surface of the convex portion forming body 35. FIG. 2 is a graph showing a relative sound pressure level difference which is a difference between a sound generation level by the movable louver device of the best mode 1 obtained by an experiment and a sound generation level by a conventional movable louver device. FIG. 3 shows the experimental conditions of the rotating blades of the movable louver device of the best mode 1 and the rotating blades of the conventional movable louver device. FIG. 4 shows the front surface (back surface) of the rotary blade. In addition, the same code | symbol is attached | subjected about the same part as the prior art example shown in FIG. 9 thru | or FIG. 16, and the description is abbreviate | omitted.
図１に示すように、可動ルーバー装置１Ａは、図１０；図１４に示した形状の従来の回転羽根３の表面８ａの全体及び裏面８ｂの全体に点在する凸部３６を有した回転羽根３Ａを備えて構成される。例えば、図１（ｃ）に示すように、円形の平面に形成された取付面３１と、円形平面の周縁３２から延長して球面の一部（例えば半球面）を形成する面に形成された隆起面３３とを備えた形状（つまり、饅頭のような形状）の凸部形成体３５を用い、この凸部形成体３５を回転羽根３の表面８ａ及び裏面８ｂのあちこちに散らばるように表面８ａ及び裏面８ｂに複数個取付けた。凸部形成体３５の表面８ａ及び裏面８ｂへの取付けは、取付面３１と表面８ａ又は裏面８ｂとを接着剤により接着すればよい。
As shown in FIG. 1, the movable louver device 1 </ b> A has a rotating blade having convex portions 36 scattered over the entire surface 8 a and the entire back surface 8 b of the conventional rotating blade 3 having the shape shown in FIG. 10; FIG. 14. 3A is comprised. For example, as shown in FIG. 1C, the mounting surface 31 is formed on a circular plane, and the surface is formed on a surface that extends from the peripheral edge 32 of the circular plane and forms a part of a spherical surface (for example, a hemispherical surface). A convex portion forming body 35 having a raised surface 33 (that is, a shape like a wharf) is used, and the convex portion forming body 35 is scattered over the surface 8a and the back surface 8b of the rotary blade 3 so as to be scattered around the surface 8a. And a plurality of the back surface 8b. The attachment to the front surface 8a and the back surface 8b of the projection forming body 35 may be performed by bonding the mounting surface 31 and the front surface 8a or the back surface 8b with an adhesive.
最良の形態１によれば、上述した角度設定手段１５が、上下方向（一方向）に隣り合う回転羽根３と回転羽根３との間に風の通過を許容する通路Ｓを形成するように回転羽根３の表面８ａや裏面８ｂの傾斜角度を固定した場合、例えば、図３（ａ）に示すように、風Ｆの流れる方向と回転羽根３の互いに平行な表面８ａ及び裏面８ｂとのなす角度αが６０°の場合において、風Ｆの流れが凸部３６により不規則に乱れやすくなり、図１４で説明した渦Ｆ１→圧力波Ｆ２→渦Ｆ１の繰り返しが阻害されるので、フィードバック発振音の発生原因となる渦Ｆ１の発生を防止でき、フィードバック発振音の発生を効果的に防止できる。
尚、特許文献１乃至特許文献３などで開示された固定ルーバー装置のように、固定のルーバフィンの風上縁部や風下縁部に縁板や円柱状物体のような風切り騒音防止部を備えた構成の場合、固定されたルーバフィンの角度にて想定された一定の風向きの場合には風切り騒音防止部によりフィードバック発振音の発生を抑えることができるが、一定の風向き以外の場合にはフィードバック発振音の発生を防止できない。
一方、最良の形態１の可動ルーバー装置１Ａによれば、回転羽根３Ａの角度設定手段１５を操作することで回転羽根３Ａの角度を変えることが可能となり、回転羽根３Ａが任意の角度に設定された場合においては、どのような風向きの風であっても風の流れが凸部３６により不規則に乱れやすくなるので、周期的な渦の発生を防止でき、フィードバック発振音の発生を効果的に防止できる。
According to the best mode 1, the angle setting means 15 described above rotates so as to form a passage S that allows passage of wind between the rotary blades 3 adjacent to each other in the vertical direction (one direction). When the inclination angle of the front surface 8a and the back surface 8b of the blade 3 is fixed, for example, as shown in FIG. 3A, the angle formed by the direction in which the wind F flows and the front surface 8a and the back surface 8b of the rotary blade 3 parallel to each other When α is 60 °, the flow of the wind F tends to be irregularly disturbed by the convex portion 36, and the repetition of the vortex F1 → the pressure wave F2 → the vortex F1 described in FIG. The generation of the vortex F1 that is the cause of generation can be prevented, and the generation of feedback oscillation sound can be effectively prevented.
In addition, like the fixed louver device disclosed in Patent Document 1 to Patent Document 3, etc., a wind noise prevention unit such as an edge plate or a cylindrical object is provided on the windward edge or leeward edge of the fixed louver fin. In the case of the configuration, in the case of a constant wind direction assumed at a fixed louver fin angle, the generation of feedback oscillation sound can be suppressed by the wind noise prevention unit, but in the case of other than the constant wind direction, the feedback oscillation sound is suppressed. Can not be prevented.
On the other hand, according to the movable louver device 1A of the best mode 1, the angle of the rotary blade 3A can be changed by operating the angle setting means 15 of the rotary blade 3A, and the rotary blade 3A is set to an arbitrary angle. In this case, since the wind flow is likely to be irregularly disturbed by the convex portion 36 regardless of the wind direction, it is possible to prevent the generation of periodic vortices and effectively generate the feedback oscillation sound. Can be prevented.
図２は実験により求められた最良の形態１の可動ルーバー装置１Ａによる音発生レベルと図１０；図１４に示した従来の可動ルーバー装置１による音発生レベルとの差である相対音圧レベル差をグラフで示したものである。実験は、図３（ａ）に示すように、風Ｆの流れる方向と最良の形態１の可動ルーバー装置１Ａの回転羽根３の互いに平行な表面８ａ及び裏面８ｂとのなす角度αを６０°となるように設定した後に、回転羽根３に風速７ｍ／ｓの風を送って発生した音圧レベルを測定した。また、図３（ｂ）に示すように、従来の可動ルーバー装置１の回転羽根３（図１０；図１４参照）を図３（ａ）に示した最良の形態１の可動ルーバー装置１Ａの回転羽根３と同じ条件下において実験してその音圧レベルを測定した。
図２から解かるように、最良の形態１の可動ルーバー装置１Ａによれば、従来の可動ルーバー装置１と比べて、特に、３００Ｈｚ帯域で１０ｄＢの音低減効果が得られた。
FIG. 2 shows a relative sound pressure level difference which is a difference between a sound generation level obtained by the experiment of the movable louver device 1A of the best mode 1 and a sound generation level obtained by the conventional movable louver device 1 shown in FIG. Is shown in a graph. In the experiment, as shown in FIG. 3A, the angle α formed between the direction in which the wind F flows and the surface 8a and the back surface 8b of the rotary blade 3 of the movable louver device 1A of the best mode 1 parallel to each other is 60 °. Then, the sound pressure level generated by sending wind of 7 m / s to the rotary blade 3 was measured. Further, as shown in FIG. 3B, the rotating blade 3 (see FIG. 10; FIG. 14) of the conventional movable louver device 1 is rotated by the movable louver device 1A of the best mode 1 shown in FIG. The sound pressure level was measured by experimenting under the same conditions as the blade 3.
As can be seen from FIG. 2, according to the movable louver device 1A of the best mode 1, a sound reduction effect of 10 dB was obtained particularly in the 300 Hz band as compared with the conventional movable louver device 1.
尚、図４に示すように、回転羽根３の表面８ａ及び裏面８ｂのあちこちに散らばるように表面８ａ及び裏面８ｂに大きさの異なる凸部形成体３５を取り付けることにより、表面８ａ及び裏面８ｂに大きさの異なる凸部３６を設けた回転羽根３Ａとすれば、大きさの異なる凸部３６により風の流れがさらに不規則に乱れやすくなり、図１４で説明した渦Ｆ１→圧力波Ｆ２→渦Ｆ１の繰り返しが阻害されるので、渦Ｆ１の発生を防止でき、フィードバック発振音の発生を効果的に防止できる。
In addition, as shown in FIG. 4, by attaching the convex part formation body 35 from which the magnitude | size differs to the surface 8a and the back surface 8b so that it may be scattered all over the surface 8a and the back surface 8b of the rotary blade 3, it is attached to the surface 8a and the back surface 8b. If the rotary blade 3A is provided with the convex portions 36 having different sizes, the flow of the wind is more likely to be irregularly disturbed by the convex portions 36 having different sizes, and the vortex F1 → pressure wave F2 → vortex described with reference to FIG. Since the repetition of F1 is inhibited, the generation of the vortex F1 can be prevented, and the generation of feedback oscillation sound can be effectively prevented.
表面８ａの全体及び裏面８ｂの全体に設けられる複数の凸部３６の配置形態は、規則性のない配置形態とすることが好ましい。規則性のない配置形態とした場合のほうが、凸部３６により風Ｆの流れがさらに不規則に乱れやすくなり、フィードバック発振音の発生を効果的に防止できる。
The arrangement form of the plurality of convex portions 36 provided on the entire front surface 8a and the entire back surface 8b is preferably an arrangement form having no regularity. In the case of the arrangement form having no regularity, the flow of the wind F is more likely to be irregularly disturbed by the convex portion 36, and the generation of feedback oscillation sound can be effectively prevented.
最良の形態２．
図５；図６に示すように、図１２に示した両方の縁面９としての上縁面９ａ及び下縁面９ｂにそれぞれ凹凸係合部１６；１６を有した従来の回転羽根３の表面８ａの全面及び裏面８ｂの全面に凸部３６を点在させた回転羽根３Ａを備えた可動ルーバー装置１Ａとしてもよい。尚、最良の形態２において、図１２に示したものと同じように、凹凸係合部１６の凸部１６ａの厚さ寸法ｘと凹部１６ｂの厚さ寸法ｙとを同じにし、かつ、凸部１６ａの高さ寸法ｅと凹部１６ｂの深さ寸法ｆとを同じにすることで、上下の回転羽根３Ａ；３Ａ間の隙間が小さくかつ平坦な風遮蔽面８を形成できる。
Best Mode 2
5: As shown in FIG. 6, the surface of the conventional rotating blade 3 having the concave and convex engaging portions 16; 16 on the upper edge surface 9a and the lower edge surface 9b as both edge surfaces 9 shown in FIG. The movable louver device 1A may include a rotating blade 3A in which convex portions 36 are scattered on the entire surface of 8a and the entire surface of the back surface 8b. In the best mode 2, as in the case shown in FIG. 12, the thickness dimension x of the convex portion 16a and the thickness dimension y of the concave portion 16b of the concave-convex engaging portion 16 are the same, and the convex portion By making the height dimension e of 16a and the depth dimension f of the recess 16b the same, a flat wind shielding surface 8 with a small gap between the upper and lower rotary blades 3A; 3A can be formed.
最良の形態３．
図７に示すように、図１３に示した係合凹部１７を有した従来の回転羽根３の表面８ａ及び裏面８ｂに凸部３６を点在させた構成の回転羽根３Ａを備えた可動ルーバー装置１Ａとしてもよい。尚、最良の形態３において、係合凹部１７は、図１３に示す延長片１８ａ（１８ｃ）と水平片１８ｂ（１８ｄ）とを備えた断面Ｌ字状の長尺材を後付けして形成することで回転羽根３Ａの製造コストを低減できる。
Best Mode 3
As shown in FIG. 7, the movable louver device provided with the rotary blade 3A having the configuration in which the convex portions 36 are dotted on the front surface 8a and the back surface 8b of the conventional rotary blade 3 having the engagement concave portion 17 shown in FIG. It may be 1A. In the best mode 3, the engagement recess 17 is formed by retrofitting a long material having an L-shaped cross section provided with an extension piece 18a (18c) and a horizontal piece 18b (18d) shown in FIG. Thus, the manufacturing cost of the rotary blade 3A can be reduced.
最良の形態４．
回転羽根３の表面８ａ及び裏面８ｂのうちの一方の面のみに凸部３６を設けてもよい。
Best Mode 4
The convex portion 36 may be provided only on one of the front surface 8a and the back surface 8b of the rotary blade 3.
最良の形態５．
回転羽根３の表面８ａ及び裏面８ｂのうちの少なくとも一方の面のみにおける両方の縁面９側、即ち、上縁面９ａ側及び下縁面９ｂ側のみに凸部３６を設けてもよい。
Best Mode 5
The convex portions 36 may be provided only on both edge surfaces 9 side, that is, only on the upper edge surface 9 a side and the lower edge surface 9 b side, on at least one of the front surface 8 a and the back surface 8 b of the rotary blade 3.
最良の形態１乃至５の可動ルーバー装置１Ａを連結機構５も含めて図８に斜視図で示した。図８（ａ）は可動ルーバー装置１Ａの回転羽根３Ａが風を遮蔽する状態に設定された場合を斜視図で示し、図８（ｂ）は可動ルーバー装置１Ａの回転羽根３Ａが回転羽根３Ａ間に風の通過を許容する通路Ｓを形成した状態に設定された場合を斜視図で示す。
The movable louver device 1A of the best mode 1 to 5 including the connecting mechanism 5 is shown in a perspective view in FIG. FIG. 8A is a perspective view showing a case where the rotating blades 3A of the movable louver device 1A are set in a state of shielding the wind, and FIG. 8B is a diagram between the rotating blades 3A of the movable louver device 1A and the rotating blades 3A. FIG. 6 is a perspective view showing a case where a passage S that allows passage of wind is formed.
表面に点在する凸部を備えたシートを凸部形成体として用いてもよい。
表面８ａ及び裏面８ｂは、中央部が湾曲状に隆起したような形状でもよい。
You may use the sheet | seat provided with the convex part scattered on the surface as a convex part formation body.
The front surface 8a and the back surface 8b may be shaped such that the central portion is raised in a curved shape.
回転羽根の遮蔽状態、通路形成状態、凸部形成体を示す図（最良の形態１）。The figure which shows the shielding state of a rotary blade, a channel | path formation state, and a convex part formation body (best form 1).
実験結果を示すグラフ（最良の形態１）。The graph which shows an experimental result (best form 1).
実験条件を示す図であって、（ａ）は最良の形態１の回転羽根の実験条件を示し、（ｂ）は従来の回転羽根の実験条件を示す図（最良の形態１）。It is a figure which shows experimental conditions, Comprising: (a) shows the experimental condition of the rotary blade of the best form 1, (b) shows the experimental condition of the conventional rotary blade (Best form 1).
回転羽根の表面（裏面）を示す平面図（最良の形態１）。The top view which shows the surface (back surface) of a rotary blade (best form 1).
回転羽根の遮蔽状態、通路形成状態を示す図（最良の形態２）。The figure which shows the shielding state of a rotary blade | wing, and a channel | path formation state (best form 2).
回転羽根の表面（裏面）を示す平面図（最良の形態２）。The top view which shows the surface (back surface) of a rotary blade (best form 2).
回転羽根の表面（裏面）を示す平面図（最良の形態３）。The top view which shows the surface (back surface) of a rotary blade (best form 3).
回転羽根の遮蔽状態及び通路形成状態を示す図（最良の形態１乃至５）。The figure which shows the shielding state and passage formation state of a rotary blade (best form 1 thru | or 5).
可動ルーバー装置を示す斜視図（従来）。The perspective view which shows a movable louver device (conventional).
回転羽根の遮蔽状態及び通路形成状態を示す図（従来）。The figure which shows the shielding state and passage formation state of a rotary blade (conventional).
回転支持部、連結機構、角度設定手段の詳細を示す斜視図（従来）。The perspective view which shows the detail of a rotation support part, a connection mechanism, and an angle setting means (conventional).
回転羽根の遮蔽状態及び通路形成状態を示す図（従来）。The figure which shows the shielding state and passage formation state of a rotary blade (conventional).
回転羽根の遮蔽状態及び通路形成状態を示す図（従来）。The figure which shows the shielding state and passage formation state of a rotary blade (conventional).
フィードバック発振音の発生原理を説明した図（従来）。The figure explaining the generation principle of feedback oscillation sound (conventional).
フィードバック発振音の発生原理を説明した図（従来）。The figure explaining the generation principle of feedback oscillation sound (conventional).
フィードバック発振音の発生原理を説明した図（従来）。The figure explaining the generation principle of feedback oscillation sound (conventional).
符号の説明Explanation of symbols
１Ａ 可動ルーバー装置、２ ルーバー枠（枠）、３Ａ 回転羽根、４ 回転支持部、
８ 風遮蔽面、８ａ 表面、８ｂ 裏面、９ 縁面、１０ 端面、１１ 回転中心軸、
３５ 凸部形成体、３６ 凸部。
1A movable louver device, 2 louver frame (frame), 3A rotary blade, 4 rotary support part,
8 wind shielding surface, 8a front surface, 8b back surface, 9 edge surface, 10 end surface, 11 rotation center axis,
35 convex part formation body, 36 convex part.
