JP5066215B2 - Awning - Google Patents

Description

  The present invention relates to an awning capable of efficiently suppressing a temperature rise, and more particularly to an awning having a fractal structure.

  Patent Document 1 includes, as an awning having a fractal structure, four basic elements having a dihedral shape that is a quadrangle when viewed from the plane, arranged so as to be adjacent to each other on the left, right, front, back, and top and bottom. There are gaps between the elements, but it is disclosed that each basic element is arranged such that these gaps become zero when viewed from the maximum light shielding direction inclined by a predetermined angle.

  In this awning, the shape seen from the first horizontal direction in which the area of the opening is maximized is a large dihedron joined so that two large triangular portions are inverted V-shaped, and two small triangular portions. The basic structure is a tetrahedron consisting of a small dihedron joined to a large dihedron so as to be symmetrical with the upper half of the large dihedron joined so as to be V-shaped. It is formed by being installed.

JP 2008-196254 A

  The awning shown in the above-mentioned Patent Document 1 is actually described as a method of installation, but the angle of the ridge line of the awning in that case is merely described as an appearance with respect to the angle with respect to the sun, In order to specify the angle depending on the installation location, there was a problem that the calculation had to be performed based on the angle of the sun for each installation location.

  In winter, sunlight was warmer, but the angle was not taken into account.

  An object of the present invention is to provide an awning that can be installed at an appropriate angle including use in winter when installed in different regions around the world.

The sunshade installation structure according to the first invention is a large dihedron in which the shape viewed from the first horizontal direction in which the area of the opening is maximized is joined so that two large triangular portions are inverted V-shaped. The basic structure is a tetrahedron consisting of two small triangular parts joined in a V shape and a small dihedron joined to a large dihedron so as to be symmetrical with the upper half of the large dihedron. , a installation structure of sunshade formed by the tetrahedron is placed a plurality succession, before Symbol date dividing only a first tetrahedron in the reference position, the front of the first tetrahedron a second tetrahedron vertices of the first tetrahedrons are arranged with the apex of the second tetrahedron is linked superimposed, disposed to the right of the first tetrahedron and a second tetrahedron together the vertices of the first tetrahedrons is a vertex of the third tetrahedron are linked superimposed A third tetrahedron and the vertex of the second tetrahedron vertices of the third tetrahedron are linked superimposed, it is arranged on the left of the first tetrahedron and a second tetrahedron first with 1 of the vertex of the tetrahedron vertices of the fourth tetrahedron are linked superimposed, a fourth of the apex of the second tetrahedron vertices of the fourth tetrahedron are linked superimposed Four tetrahedrons consisting of tetrahedrons are the basic elements, and the butted parts of each tetrahedron are joined at the time of injection molding, and the awning is installed approximately horizontally with the ridge line of the awning facing southward. It is a feature .
The sunshade installation structure according to the second invention is a large dihedron in which the shape viewed from the first horizontal direction in which the area of the opening is maximized is joined so that two large triangular portions are inverted V-shaped. The basic structure is a tetrahedron consisting of two small triangular parts joined in a V shape and a small dihedron joined to a large dihedron so as to be symmetrical with the upper half of the large dihedron. An awning installation structure formed by continuously installing a plurality of these tetrahedrons, wherein the awning is arranged in front of the first tetrahedron at the reference position and the first tetrahedron. A first tetrahedron and a second tetrahedron are overlapped and connected to each other, and the first tetrahedron and the second tetrahedron are arranged to the right of the first tetrahedron and the second tetrahedron. The top of the first tetrahedron and the top of the third tetrahedron are overlapped and connected. The second tetrahedron and the third tetrahedron are overlapped and connected to the third tetrahedron, and the first tetrahedron and the second tetrahedron are arranged to the left of the first tetrahedron and the second tetrahedron. The vertex of the first tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected, and the vertex of the second tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected Four tetrahedrons consisting of tetrahedrons are used as basic elements, and the butted portions of each tetrahedron are joined at the time of injection molding, and the awning is installed with the ridge line of the sunshade facing west. It is.
The sunshade installation structure according to the third aspect of the present invention is a large dihedron in which the shape viewed from the first horizontal direction where the area of the opening is maximum is joined so that two large triangular portions are inverted V-shaped. The basic structure is a tetrahedron consisting of two small triangular parts joined in a V shape and a small dihedron joined to a large dihedron so as to be symmetrical with the upper half of the large dihedron. An awning installation structure formed by continuously installing a plurality of these tetrahedrons, wherein the awning is arranged in front of the first tetrahedron at the reference position and the first tetrahedron. A first tetrahedron and a second tetrahedron are overlapped and connected to each other, and the first tetrahedron and the second tetrahedron are arranged to the right of the first tetrahedron and the second tetrahedron. The top of the first tetrahedron and the top of the third tetrahedron are overlapped and connected. The second tetrahedron and the third tetrahedron are overlapped and connected to the third tetrahedron, and the first tetrahedron and the second tetrahedron are arranged to the left of the first tetrahedron and the second tetrahedron. The vertex of the first tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected, and the vertex of the second tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected Four tetrahedrons composed of tetrahedrons are used as basic elements, the butted portions of each tetrahedron are joined at the time of injection molding, and the awning is installed at a predetermined inclination angle with respect to the horizontal. Is .

Sunshade, for example, are installed on the roof or the like of a building and intended to block the sunlight, installation surface thereof is usually substantially water flat. During installation, point a is positioned on the installation surface, point c, point e, and point f form a ridge line (maximum height), and point b and point d form a line having a height of ½. . The straight line ef is parallel to the installation surface, the angle formed by the straight line af and the straight line ef is the same as the angle formed by the straight line af and the installation surface, and the angle formed by the straight line ac and the straight line ef is the straight line ac and It is the same as the angle made with the installation surface.

  The opening has an effect of improving ventilation, thereby realizing both light shielding properties and good ventilation. In this awning, the opening area / total area of the awning viewed from a certain direction is greatly different depending on the direction (angle). Although it is preferable to block sunlight in summer, it is not preferable to block sunlight in winter. Conventionally, an appropriate angle during use in winter has not been considered.

  In the awning according to the present invention, the angle between the straight line af and the straight line ef (installation surface) is an angle α ° corresponding to the solar altitude in winter, and the angle between the straight line ac and the straight line ef (installation surface) is the summer sun. The angle corresponding to the altitude is set to β ° (β> α), so that it can block sunlight in the summer and easily transmit sunlight in the winter, and is suitable for installation in different regions around the world. Easy installation at a certain angle.

  In the above, αmin <α <αmin + 10 and βmax−10 <β <βmax, where αmin = 90− (latitude + 23) and βmax = 90− (latitude−23) or βmax = 90− (23−latitude). Preferably it is.

  αmin is the lowest solar altitude on the winter solstice day in the Northern Hemisphere, and αmin <α <αmin + 10 is less than αmin + 10, which is the solar altitude 1-2 months later when α is greater than αmin and actually reaches the lowest temperature. It is shown that the range of is preferable.

  In the northern hemisphere, βmax is the highest solar altitude on the day of the summer solstice, and is calculated differently for regions where latitude is greater than 23 ° and regions where latitude is greater than 23 °. In regions where latitude is greater than 23 °, βmax = 90− (latitude− 23) In an area where the latitude is less than 23 °, βmax = 90− (23−latitude). [beta] max-10 <[beta] <[beta] max indicates that [beta] is smaller than this [beta] max, and a range of [beta] max-10 or more, which is the solar altitude 1-2 months after the actual maximum temperature is reached.

  According to the present invention, an angle formed by a straight line af forming one side of a large triangular portion and a straight line ef (installation surface) forming a ridge line of a large dihedron is an angle α ° corresponding to the solar altitude in winter, Since the angle between the straight line ac that bisects the large triangular part and the straight line ef (installation surface) that forms the edge of the large dihedron is the angle β ° (β> α) corresponding to the summer solar altitude In addition to blocking sunlight in summer, it is easy to transmit sunlight in winter, and installation at an appropriate angle is facilitated when installing in different regions around the world.

FIG. 1 is a front view showing an embodiment of an awning according to the present invention. FIG. 2 is a side view of the same. FIG. 3 is a plan view of the same. FIG. 4 is a sectional view of the same. FIG. 5 is a perspective view of the same. FIG. 6 is a plan view of the case where four tetrahedrons are joined with the ridge line of the sunshade according to the present invention at the center.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, left and right in FIG. 1 are referred to as left and right, and up and down are referred to as up and down, and a direction orthogonal to these is referred to as front and back (the front side of the drawing in FIG. 1 is front). Therefore, in FIG. 2, the right is front, the left is rear, and the top and bottom are up and down. In FIG. 3, the right is front, the left is rear, the top is left, and the bottom is right. Note that the “front view” and “side view” are determined for convenience, and the front face at the time of installation does not need to coincide with the front face shown below.

  The awning according to the present invention is formed with the tetrahedron (1) shown in FIGS. 1 to 5 as a minimum unit.

  FIG. 1 shows the shape (front view) seen from the first horizontal direction (front) where the area of the opening is maximum, and the front shape of the tetrahedron (1) is two large triangular parts (4) ( 5) is a large dihedron (2) joined in an inverted V shape, and two small triangular parts (3a) (3b) are joined in a V shape to form a large dihedron (2). And a small dihedron (3) coupled to a large dihedron (2) so as to be symmetrical with the upper half of the.

  FIG. 2 shows a shape (side view) viewed from a second horizontal direction (left side of FIG. 1) orthogonal to the first horizontal direction, which shows a large triangular portion (4). . In the figure, a straight line E forms a winter solar altitude α ° from a point a on the installation surface A, and a straight line F similarly forms a summer solar altitude β ° from the point a. A straight line is drawn from the point a so as to intersect the straight lines B and C in parallel with the straight line bc connecting the intersection point b between the straight line B and the straight line E and the intersection point c between the straight line C and the straight line F, and the intersection point with the straight line B is d, Let e be the intersection with the straight line C. Let the intersection of the straight line C and the straight line E be f. The straight line ac is a line that bisects the large triangular portion (4). The triangle abd, the triangle bfc, and the triangle dce are made of an awning material, and the triangle bcd is an opening. Thus, the shape of the tetrahedron (1) viewed from the second horizontal direction orthogonal to the first horizontal direction is such that the lower inverted triangle part abd (4a) arranged on the lower side and the lower inverted triangle part abd are arranged. (4a) and two upper triangular portions dce (4b) and bfc (4c) arranged on the upper side so as to form a triangular opening bcd (4d).

  The shape seen from the right side of FIG. 1 (large triangular portion (5)) is also the same shape as the shape shown in FIG. Therefore, as shown in FIG. 4, the large triangular portion (4) on the left side is provided with the opening bcd (4d), and the large triangular portion (5) on the right side is also provided with the opening b′cd ′ ( 5d), and these two openings (4d) and (5d) are at the same height, and in FIG. 2, they overlap. Thereby, the sunlight in the paper surface direction of FIG. 2 and the left-right direction of FIG. 4 can pass through the one opening (4d) and pass through the other opening (5d) without being interrupted.

  In FIG. 1 and FIG. 2, A shows an awning installation surface, and the vertices a and a 'of the large triangular portions (4) and (5) and the ridge line g of the small dihedron (3) are on this installation surface. , C indicates the height of the ridgeline (shade height), and the other two vertices e and f of the large triangle (4) (5) forming the ridgeline of the large dihedron (2) and its exact An intermediate point c is on this installation surface, B indicates a half height surface, and points b, d, which are the joints of a large dihedron (2) and a small dihedron (3). b 'and d' are on this 1/2 height plane. In addition, A, B, and C are mutually parallel at equal intervals.

  FIG. 3 is a plan view of the tetrahedron (1) of FIGS. 1 and 2 as viewed from above. The straight lines A, B, C and points a, b, c, d, e, f are the same as those shown in FIG. 2, and the straight lines A ′, B ′ and points a ′, b ′, d ′ are the same as those shown in FIG. Then, it is the place where each overlapped. The large triangular portion (5) not shown in FIG. 2 is similar to the large triangular portion (4) shown in FIG. 2 in the lower inverted triangular portion a′b′d ′ ( 5a) and two upper triangular portions d 'arranged on the upper side so as to form a triangular opening b'cd' (5d) between the lower inverted triangular portion a'b'd '(5a). ce (5b) and b'fc (5c).

  The parallel lines A, B, C, B ′, A ′ are equally spaced, and the distance is not particularly limited, but the distance from which the triangle abd becomes a substantially equilateral triangle when viewed from the direction of FIG. preferable.

  For the triangular openings bcd (4d) and b'cd '(5d), in fact, these openings (4d) (5d) are formed to be appropriately smaller than the awning material part, and the awning material is connected to each other at each point. It is connected with. 2 and 3, the actual openings (4d) and (5d) are indicated by solid lines, and the imaginary lines necessary to form the openings (4d) and (5d) are indicated by two-dot chain lines.

  FIG. 5 shows an example of viewing the tetrahedron (1) from an oblique direction. The tetrahedron (1) has three different views as shown in FIG. 1 to FIG. 3, and therefore, the view seen from the oblique direction varies greatly depending on the viewing direction and angle. For example, when the tetrahedron (1) is viewed obliquely from above, as shown in FIG. 5, the triangular openings (4d) and (5d) are formed from the triangular parts (3a) and (3b) of the small dihedron (3). A part of the gap is blocked by, and the gap through which sunlight can pass varies depending on the direction.

  Therefore, although there are gaps between the tetrahedrons (1), each tetrahedron (1) is arranged so that these gaps are zero when viewed from the maximum light-shielding direction inclined at a predetermined angle in summer. When viewed from the sun direction in winter, there is nothing to block sunlight except for the thickness of the sunscreen material, and it is possible to obtain the required awning by arranging each tetrahedron (1) so that all are gaps it can.

  When installing the awning, as shown in FIG. 2, a straight line af forming one side of the large triangular portion (4) and a straight line ef (parallel to the installation surface A) forming the ridgeline of the large dihedron (2) Is defined as an angle α ° corresponding to the solar altitude in winter, a straight line ac that bisects the large triangular part (4) and a straight line ef that forms a ridgeline of the large dihedron (2) (parallel to the installation surface A) ) Is an angle β ° (β> α) that corresponds to the solar altitude in the summer, so that it can block sunlight in the summer and make the sunlight more transparent in the winter. When installing in different areas, installation at an appropriate angle becomes easy.

  FIG. 6 is a plan view of a configuration (an example of a sunshade component) in which four tetrahedrons (1) shown in FIG. 3 are connected.

  This sunshade component is arranged in front of the first tetrahedron (1) and the first tetrahedron (1) at the reference position, and the first tetrahedron (1) f and the second tetrahedron ( 11) The second tetrahedron (11) connected to and overlapped with e2, and the first tetrahedron arranged on the right side of the first tetrahedron (1) and the second tetrahedron (11). The body (1) a and e3 of the third tetrahedron (12) are overlapped and connected, and a2 of the second tetrahedron (11) and f3 of the third tetrahedron (12) are overlapped. The third tetrahedron (12) connected and connected to the left side of the first tetrahedron (1) and the second tetrahedron (11) and a ′ of the first tetrahedron (1) And e4 of the fourth tetrahedron (13) are overlapped and connected, and a'2 of the second tetrahedron (11) and f4 of the fourth tetrahedron (13) are overlapped and connected. The four tetrahedrons (1), (11), (12), and (13), which are the fourth tetrahedron (13), are used as basic elements.

  The third tetrahedron (12) and the fourth tetrahedron (13) are arranged below the first tetrahedron (1) and the second tetrahedron (11), and the third tetrahedron. The ridge line (straight line C) in (12) and the straight line A in the first tetrahedron (1) and the second tetrahedron (11) are on the same straight line, and the ridge line (straight line in the fourth tetrahedron (13)) C) and the straight line A in the first tetrahedron (1) and the second tetrahedron (11) are on the same straight line.

  Each of the four tetrahedrons (1), (11), (12), and (13) in FIG. 6 is replaced with an awning component comprising the four tetrahedrons (1), (11), (12), and (13) shown in FIG. As a result, an awning component comprising 16 tetrahedrons (1), (11), (12) and (13) is obtained. By repeating this, it is possible to obtain an awning of a fractal structure in which the tetrahedron (1) shown in FIGS.

  The angle α ° shown in FIG. 2 varies depending on the latitude of the area where this awning is used.

  In the Northern Hemisphere, 90− (latitude + 23) = αmin in the winter solstice is the lowest solar altitude, α is larger than this αmin, and it is below αmin + 10, which is the solar altitude 1 to 2 months after the lowest temperature is actually reached. The range of is preferable.

  In the southern hemisphere as well, the awning direction (the direction of the straight line C in FIG. 2) is reversed from north to south.

  The angle β also changes depending on the latitude of the area where this awning is used, and is 23 ° (23.4 °, which is the inclination of the earth's earth axis, but 0.4 ° has almost no effect on the effect, so 23 ° is assumed. ) It changes depending on higher latitude or lower latitude.

  In an area where the latitude is greater than 23 °, in the northern hemisphere, 90− (latitude−23) = βmax in the summer solstice is the highest solar altitude, β is smaller than this βmax, and actually becomes the highest temperature 1-2. A range of βmax-10 or more, which is the solar altitude after a month, is preferable.

  In the southern hemisphere as well, the awning direction (the direction of the straight line C in FIG. 2) is reversed from north to south.

  In an area where the latitude is less than 23 °, in the northern hemisphere, 90− (23−latitude) = βmax in the summer solstice is the highest solar altitude, β is smaller than this βmax, and actually becomes the lowest temperature 1-2. A range of βmax-10 or more, which is the solar altitude after a month, is preferable.

  In the southern hemisphere as well, the awning direction (the direction of the straight line C in FIG. 2) is reversed from north to south.

  The size of one side of the triangle is 100 mm or less, preferably 50 mm or less, and the sunshade effect is large (the increase in the ground temperature at the bottom is small).

    An awning component (for example, the one shown in FIG. 6) can be manufactured by forming a triangular hole and a bent portion, for example, by cutting and bending a part of a plastically deformable plate material. . The awning component can also be manufactured as an injection molded product made of synthetic resin.

    When manufacturing by bending, the first tetrahedron, the second tetrahedron, the third tetrahedron, and the size of the triangular hole are made slightly smaller than the size of the three triangular plate portions surrounding the triangular hole. The fourth tetrahedrons are joined at the abutting portions, and the abutting portions of the tetrahedrons are joined by appropriate means such as welding and welding. In the case of a synthetic resin injection-molded product, the butted portions of the tetrahedrons are joined at the time of injection molding.

    Strengthening is achieved by joining the butted portions of the tetrahedrons, and it is easy to assemble a large number of awnings.

  In forming the awning, a joint may be used or the awning can be formed using a reinforcing material.

    An awning is formed, for example, by arranging a predetermined number of awning components so that ridge lines are continuous, and the unit is supported by a reinforcing material extending in the ridge line direction. The

    As the reinforcing material, a metal wire, a metal wire, a natural fiber or a synthetic fiber rope can be used. The reinforcing material may be flexible and can be bent easily, or may not be flexible like a steel material. The reinforcing member and each awning component can be fixed with, for example, an adhesive. A protrusion is added to each awning member, and a hole, a slit, or the like for supporting the reinforcing member is formed in the protrusion. Alternatively, the reinforcing material may be fixed by caulking the protrusions. In addition, when the reinforcing material has flexibility, it is only necessary to sequentially insert the reinforcing material into the through-holes of the awning component using the through-holes provided in each awning component, If the reinforcing material is not flexible, a wire is inserted into the through-hole provided in each awning component and the reinforcing material and the awning component are coupled by this wire. Good.

    Reinforcing material has a length that protrudes from the awning components at both ends, and each unit is fixed to a pair of supporting members arranged opposite to each other, thereby fixing one unit to the supporting material. Is done. Then, by arranging a plurality of units in parallel at a pitch corresponding to the size of the sunshade component (the length in the direction orthogonal to the ridgeline direction), the number of sunshade components used on one side per unit X The length of the awning component in the ridgeline direction, and the other side is the number of units x the length in the direction perpendicular to the ridgeline direction of the awning component can be obtained. For example, the support member may be a frame that is supported at four corners by pillars. The support material may be installed horizontally or may be installed so as to be inclined at a predetermined angle with respect to the horizontal.

    The support material for supporting the reinforcing material is set according to the direction of the sunshade (east, west, south, north) and the elevation angle. For example, if you want to prevent sunlight during the summer day, you only need to install the ridge line facing south. If you want to prevent the west, turn the ridge line toward west and make the elevation angle smaller to match the west day. That's fine. In general, it is preferable to install the awning ridgeline in a substantially horizontal direction with the aim of passing most of the solar radiation in the winter and almost blocking out the solar radiation in the summer.

    By using the reinforcing material, it can be easily assembled and has excellent strength, and can easily cope with the time and direction in which it is desired to prevent solar radiation.

(1) (12) (13) (14) tetrahedron
(2) Large dihedron
(3) Small dihedron
(3a) (3b) Small triangle
(4) (5) Large triangle
(4a) (5a) Lower inverted triangle
(4b) (5b) (4c) (5c) Upper triangle
(4d) (5d) Triangular opening

Claims (3)

The shape seen from the first horizontal direction in which the area of the opening is maximized is a large dihedron joined so that two large triangular portions are inverted V-shaped, and two small triangular portions are V-shaped. The basic structure is a tetrahedron consisting of a small dihedron connected to a large dihedron so as to be symmetrical with the upper half of the large dihedron. An awning installation structure formed by
The only pre-Symbol date dividing the reference and first tetrahedron in the position, connecting the first and tetrahedral vertices of the first tetrahedrons are disposed in front and the vertex of the second tetrahedron is superimposed a second tetrahedron is, is connected a first tetrahedron and a second of the vertices of the tetrahedron first tetrahedron is disposed to the right of the vertex of the third tetrahedron are superimposed together with a third tetrahedron and the vertex of the second tetrahedron vertices of the third tetrahedron are linked superimposed, it is arranged on the left of the first tetrahedron and a second tetrahedron with a vertex of the first tetrahedron vertices of the fourth tetrahedron are linked superimposed, the vertices of the second tetrahedron vertices of the fourth tetrahedron are linked superimposed 4 Four tetrahedrons consisting of the following tetrahedrons are the basic elements, and the butted parts of each tetrahedron are joined at the time of injection molding, , Installation structure of sunshade, characterized in that toward the ridge of the shade in the south direction, are disposed substantially horizontally. The shape seen from the first horizontal direction in which the area of the opening is maximized is a large dihedron joined so that two large triangular portions are inverted V-shaped, and two small triangular portions are V-shaped. The basic structure is a tetrahedron consisting of a small dihedron connected to a large dihedron so as to be symmetrical with the upper half of the large dihedron. An awning installation structure formed by
The awning includes a first tetrahedron at a reference position, a first tetrahedron disposed in front of the first tetrahedron, and a vertex of the first tetrahedron and a vertex of the second tetrahedron overlapped and connected. The two tetrahedrons are arranged on the right side of the first tetrahedron and the second tetrahedron, the vertexes of the first tetrahedron and the vertex of the third tetrahedron are overlapped and connected, The first tetrahedron and the second tetrahedron are arranged on the left side of the first tetrahedron and the second tetrahedron. The fourth tetrahedron in which the vertex of the tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected, and the vertex of the second tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected And the awning of each tetrahedron is joined at the time of injection molding, , Installation structure of sunshade, characterized in that it is installed toward the ridge of the shade in the west direction. The shape seen from the first horizontal direction in which the area of the opening is maximized is a large dihedron joined so that two large triangular portions are inverted V-shaped, and two small triangular portions are V-shaped. The basic structure is a tetrahedron consisting of a small dihedron connected to a large dihedron so as to be symmetrical with the upper half of the large dihedron. An awning installation structure formed by
The awning includes a first tetrahedron at a reference position, a first tetrahedron disposed in front of the first tetrahedron, and a vertex of the first tetrahedron and a vertex of the second tetrahedron overlapped and connected. The two tetrahedrons are arranged on the right side of the first tetrahedron and the second tetrahedron, the vertexes of the first tetrahedron and the vertex of the third tetrahedron are overlapped and connected, The first tetrahedron and the second tetrahedron are arranged on the left side of the first tetrahedron and the second tetrahedron. The fourth tetrahedron in which the vertex of the tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected, and the vertex of the second tetrahedron and the vertex of the fourth tetrahedron are overlapped and connected And the awning of each tetrahedron is joined at the time of injection molding, , Installation structure of sunshade, characterized in that it is installed at a predetermined inclination angle with respect to the horizontal.

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