JP7547103B2 - Roller Screen Unit - Google Patents

Description

The present invention relates to a roll screen unit in which a screen is rolled up and stored so that it can be pulled out.

As an example of a roll screen unit in which a screen is rolled up and stored so that it can be pulled out, a screen winding device is known in which a eaves is provided on the upper part of the exterior wall of a building in which a window is provided, and the device is attached to the corner between the exterior wall and the eaves along the upper edge of the window (see, for example, Patent Document 1). A sunshade sheet made of mesh fabric is attached to this screen winding device so that it can be rolled up and unrolled downward. The sunshade sheet is formed into a mesh shape from warp and weft threads, and the spacing of the weft threads is set wider in the upper area than in the lower area. By setting the mesh of the sunshade sheet in this way, when the sun reaches a certain altitude in the summer, a wide area of the mesh is set in the upper part where the eaves block sunlight, and a narrow area of the mesh is set in the lower part where the eaves cannot block sunlight. This is said to provide good ventilation and lighting in the upper area, and good sunlight blocking in the lower area.

JP 2008-106486 A

In the above screen winding device, the upper area of a single sunshade sheet is set with a wider mesh than the lower area, so the boundary between the upper and lower areas is always in a fixed position. However, since the altitude of the sun changes daily, a sunshade sheet with a preset upper and lower range may cover the upper part where the sun is blocked by the eaves with a wider mesh area, and may not be able to cover the lower part where the sun is not blocked by the eaves with a narrower mesh area. For example, if the upper and lower areas of a single sunshade sheet are divided in half, if the altitude of the sun is high and the area where the sun is blocked by the eaves is wider than half, the lower area will cover part of the area where the sun is blocked by the eaves, resulting in a loss of ventilation and daylighting in that area. Also, if the altitude of the sun is low and the area where the sun is not blocked by the eaves is wider than half, the upper area will cover part of the area where the sun shines through, resulting in a loss of sunshade properties in that area. This poses the problem that the ventilation, lighting, and solar shading provided by the screen winding device are not sufficient.

The present invention was made in consideration of these problems, and its purpose is to provide a roller blind unit with better ventilation, lighting, and solar shading.

The main invention for achieving this objective is a roll screen unit comprising: a first screen that is provided above an opening of a building, wound around a first rotating shaft, and unrolled so that its lower end is held in a predetermined position; and a second screen that is provided at the lower end of the first screen, wound around a second rotating shaft, and unrolled to an arbitrary length and held therein, wherein the first screen has higher breathability and lower light-blocking properties than the second screen.
Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings.

The present invention makes it possible to provide a roller blind unit with better ventilation, lighting and sun protection.

FIG. 2 is a vertical cross-sectional view showing a state in which the roller blind unit according to the present embodiment is attached to a building. FIG. 2 is a vertical cross-sectional view showing the screen body and the bottom screen unit. FIG. 4 is a perspective view showing a state in which a locking member is attached. FIG. 2 is a perspective view showing a configuration of the mounting unit. 13 is a plan view illustrating a method for attaching the locking member. FIG. FIG. 13 is a diagram showing the effect of a roller blind unit on the sun at different altitudes.

The following describes a roller blind unit according to one embodiment of the present invention with reference to the drawings.

As shown in FIG. 1, the roller blind unit 5 of this embodiment is attached above an opening 1b located on the boundary between the indoor and outdoor areas of a building 1, below the eaves 2, which is a structure that protrudes from the exterior wall 1a to the outdoor side. The opening 1b of the building 1 is formed by a frame 4 of a fitting 3 equipped with a sliding shoji screen 3a, and the fitting 3 is equipped with a screen door 3b on the outdoor side of the sliding shoji screen 3a. The frame 4 is framed in a rectangular shape by upper and lower horizontal frames 41 and left and right vertical frames 42. In the following explanation, the inside surrounded by the rectangular frame 4 is described as the inner periphery side, and the outside of the frame 4 is described as the outer periphery side.

The upper and lower horizontal frames 41 are provided with a screen rail 41a that extends to the inner periphery of the frame body 4 and guides the screen 3b, protruding further outdoors than the outer wall 1a of the building 1. As shown in FIG. 3, the left and right vertical frames 42 have a projected wall portion 42a along the projection direction, an insertion piece 42b that extends to the inner periphery from the outdoor edge of the projected wall portion 42a and is inserted into a groove portion (not shown) that opens at the end of the vertical frame (not shown) of the screen 3b when the screen 3b is closed, and an outer peripheral extension piece 42c that extends to the outer periphery from the outdoor edge of the projected wall portion 42a. The insertion piece 42b and the outer peripheral extension piece 42c are provided in a position that protrudes further outdoors than the outer wall 1a of the building 1, and in the projection direction, in the same position as the screen rail 41a provided on the upper and lower horizontal frames 41.

As shown in Figures 1 and 2, the roll screen unit 5 has a screen body 6 in which the first screen 60 is housed so as to be able to be pulled out, a bottom screen unit 7 that is provided at the lower end of the first screen 60 and forms a so-called bottom bar and in which the second screen 70 is housed so as to be able to be pulled out, a locking member 8 that locks the bottom screen unit 7 to keep the first screen 60 in the pulled-out state, and an attachment unit 9 that attaches the locking member 8 to the frame body 4.

The first screen 60 is made of a material with high breathability and low light blocking properties, such as a mesh material, and the second screen 70 is made of a fabric with a fine mesh suitable for blocking sunlight, such as that used for outer shades and awnings. More specifically, examples of such fabrics include those with a dense weave and high packing ratio, such as those used for outer shades, and those with a base fabric coated with vinyl chloride or the like to eliminate gaps, such as those used for awnings. In this way, the first screen 60 is made of a material with higher breathability and lower light blocking properties than at least the second screen 70. At the lower end of the second screen 70, a bottom bar 70a made of, for example, a vinyl chloride pipe is provided across the entire width.

The screen body 6 has a first shaft body 61 that is a first rotation axis arranged along the horizontal direction, a first screen 60 that is wound around the first shaft body 61, and a first casing 62 that houses the first shaft body 61 and supports both ends of the first shaft body 61 so that it can rotate freely. The first shaft body 61 is supported by being biased in the direction in which the first screen 60 is wound up, and the first screen 60 can be unrolled against the biasing force.

The bottom screen unit 7, which is provided at the end (lower end) of the first screen 60 that is pulled out from the first casing 62, has a second casing 71 provided at the lower end of the first screen 60, a second shaft body 72 housed within the second casing 71 and provided along the width direction of the first screen 60, which serves as a second rotation shaft, and a second screen 70 wrapped around the second shaft body 72.

The second casing 71 is a member manufactured by extrusion molding, and protrudes on both sides of the first screen 60 along the width direction of the first screen 60, longer than the width of the first screen 60. The second casing 71 is provided with a first screen insertion opening 71b into which the lower end of the first screen 60 is inserted over its entire length, and a first screen fixing portion 71c that fixes the first screen 60 to the second casing 71, above a screen housing portion 71a that houses the second shaft body 72 around which the second screen 70 is wound and is open downward.

The first screen 60 is held in the pulled-out state by engaging the locking members 8 with the first screen insertion openings 71b at both ends of the second casing 71 and locking the second casing 71. The locking members 8 in this embodiment are attached so that their position in the vertical direction can be changed. Therefore, by changing the position of the locking members 8, it is possible to change the position (predetermined position) at which the second casing 71 is locked, i.e., the area of the opening 1b covered by the first screen 60. The locking members 8 and the method of attaching the locking members 8 will be described later.

The second shaft 72 is supported and biased in the direction in which the second screen 70 is wound, and is equipped with a clutch mechanism 73. The clutch mechanism 73 can switch between restricting rotation in the direction in which the second screen 70 is wound and allowing said rotation. Therefore, the second screen 70 is unrolled by pulling down against the biasing force in the winding direction while rotation in the winding direction is restricted, and is held in the pulled-out state at the position where pulling down is stopped. Also, for example, when the second screen 70 is pulled down slightly from the pulled-out state, the restriction on rotation in the winding direction is released by the clutch mechanism 73, and the screen is wound up by the biasing force.

The locking member 8 has a locking member fixing portion 8a that is fixed to the mounting unit 9, and a hook portion 8b that protrudes from the locking member fixing portion 8a to the outside and has a downwardly bent tip. The locking member 8 is attached to the left and right vertical frames 42 of the frame body 4 via the mounting unit 9, and the hook portion 8b engages with the first screen insertion opening 71b at both ends of the second casing 71 to lock the second casing 71.

The mounting unit 9 has a first fixing member 91 to which the locking member 8 is fixed, and a second fixing member 92 joined to the first fixing member 91. The mounting units 9 are attached to the left and right vertical frames 42, respectively. The mounting units 9 attached to the left and right vertical frames 42, respectively, have symmetrical shapes with the left and right sides reversed. In the explanation of the mounting unit 9, the direction that is up and down when attached to the frame body 4 is referred to as the up and down direction, the depth direction that is the indoor/outdoor direction is referred to as the front direction, and the direction that is left and right and intersects with the front direction is referred to as the intersecting direction.

As shown in Figures 3 and 4, the first fixing member 91 has a projected wall abutment portion 91a that abuts against the outer peripheral surface of the projected wall portion 42a, an indoor extending wall portion 91b that extends outward from the indoor edge of the projected wall abutment portion 91a, an outer peripheral wall portion 91c that extends outward from the outer peripheral edge of the indoor extending wall portion 91b, and an attachment unit fixing portion 91d that extends inward from the upper and lower portions of the outer peripheral wall portion 91c and to which the locking member 8 is fixed.

The second fixing member 92 has a joint member 93 that abuts against the outer wall portion 91c of the first fixing member 91 and is screwed in place, and an interior/exterior member 94 that is layered on the exterior side of the joint member 93 and connected to the interior side on the inner periphery of the frame body 4.

The joint member 93 has a flat joint member extension portion 93a that abuts against the outdoor surface of the insertion piece 42b and the outer peripheral extension piece 42c and extends more outer than the outer peripheral extension piece 42c, a joint portion 93b that extends from the outer peripheral end of the joint member extension portion 93a to the outdoor side and is fixed to the outer peripheral wall portion 91c, and an indoor extension piece 93c that is a plane connected to the joint portion 93b by cutting and raising a part of the joint member extension portion 93a and extends to the indoor side. The joint member extension portion 93a and the joint portion 93b are L-shaped in a plan view, and the indoor extension piece 93c is provided so that the central portion in the up-down direction of the joint portion 93b extends to the indoor side.

A machining hole 93d is formed in the joint member extension portion 93a by cutting and raising the indoor extension piece 93c, and above and below the machining hole 93d, there are elongated holes 93e through which bolts 10 that are screwed into the indoor extension wall portion 91b of the first fixing member 91 are passed.

The joint 93b has a central recess 93f in a horizontal U-shape that is open on the outdoor side and extends into the indoor side in the vertical center. A screw 11 is inserted into the central recess 93f from the inner periphery side and serves as a fastener that is screwed into the outer periphery wall 91c of the first fixing member 91.

The inner and outer members 94 have a flat joint member fixing portion 94b that overlaps and is spot welded to the outdoor side of the joint member extension portion 93a, an indoor portion 94a that faces the indoor side of the joint member fixing portion 94b at a distance, and an inner wall portion 94c that connects the joint member fixing portion 94b and the indoor portion 94a on the inner side. The joint member fixing portion 94b has an outer peripheral recess 94d in the shape of a horizontal U, which is open on the outer peripheral side and extends into the inner peripheral side, at a position that overlaps with the long hole 93e of the joint member extension portion 93a.

The second fixing member 92, in which the joint member 93 and the inner and outer members 94 are spot welded, is attached to the frame 4 with the joint member 93b and the indoor extension piece 93c side inserted into the space surrounded by the projected wall abutment portion 91a, the indoor extension wall portion 91b, the outer peripheral wall portion 91c, and the mounting unit fixing portion 91d of the first fixing member 91, and the screw 11 inserted into the central recess 93f of the joint member 93b is sufficiently loosely screwed into the outer peripheral wall portion 91c of the first fixing member 91. At this time, two bolts 10 that pass through the long hole 93e of the joint member 93 and the outer peripheral recess 94d of the inner and outer members 94 are screwed into the indoor extension wall portion 91b of the first fixing member 91 in a sufficiently loose state. In addition, the locking member 8 is screwed to the mounting unit fixing portion 91d of the first fixing member 91.

As shown in Figure 5, the locking member 8 is attached to the vertical frame 42 by first fixing the locking member 8 to the first fixing member 91, loosening the screw 11 and two bolts 10 that secure the second fixing member 92, and then combining the first fixing member 91 and the second fixing member 92.

First, the mounting unit 9, which combines the first fixing member 91 and the second fixing member 92, is positioned so that the joint member extension portion 93a of the second fixing member 92 faces the insertion piece 42b and the outer peripheral extension piece 42c at the desired position in the vertical direction of the vertical frame 42. Then, the first fixing member 91 is tilted so that its indoor side portion is positioned closer to the outer periphery than its outdoor side portion, and the mounting unit 9 is brought closer to the frame body 4.

Next, with the first fixing member 91 tilted, insert the insertion piece 42b of the frame body 4 between the indoor surface of the joint member extension portion 93a and the outdoor surface of the indoor portion 94a, and bring the tip of the insertion piece 42b into contact with the inner wall portion 94c.

Next, rotate the first fixing member 91 so that the indoor portion moves from the outer periphery to the inner periphery, bring the projected wall abutment portion 91a into contact with the projected wall portion 42a of the frame body 4, and tighten the screws 11 from the inner periphery. At this time, the outdoor end face of the projected wall abutment portion 91a is abutted against the indoor surface of the outer periphery extension piece 42c, and the indoor end face of the indoor extension piece 93c of the second fixing member 92 is abutted against the outdoor surface of the indoor extension wall portion 91b of the first fixing member 91.

Next, by tightening the bolt 10 from the inner periphery, the outer peripheral extension piece 42c of the frame body 4 is clamped in the projection direction between the projection wall abutment portion 91a and the joint member extension portion 93a, and the vertical frame 42 is clamped in the cross direction between the projection wall abutment portion 91a and the inner periphery wall portion 94c, and the locking member 8 is fixed to the frame body 4 at the desired position in the vertical direction. In addition, by loosening the bolt 10 and the screw 11, the fixed locking member 8 becomes movable in the vertical direction along the vertical frame 42, and by tightening the bolt 10 and the screw 11 again, the locking member 8 can be fixed in the moved position.

For this reason, the locking member 8 is placed in a desired position in the vertical direction in advance, and the first screen is pulled out and the hook portion 8b of the locking member 8 is engaged with the first screen insertion opening 71b at both ends of the second casing 71 to lock the second casing 71, so that the area above the second casing can be covered with the first screen. Also, by pulling out the second screen by any desired length from the second casing 71 locked to the locking member 8 and holding the second screen, the desired area below the second casing can be covered with the second screen. Here, the position where the second casing 71 of the pulled out first screen 60 is locked by the locking member 8 that is fixed in advance corresponds to the predetermined position.

The roller blind unit 5 of this embodiment is located below the eaves 2 that protrudes from the exterior wall 1a of the building 1 toward the outdoors, and above the opening 1b that is provided at the boundary between the indoors and outdoors in the building 1, and is attached via mounting brackets 5a to the upper end of the frame 4 that is provided in the fitting 3 and forms the opening 1b.

When the eaves 2 are provided above the opening 1b formed by the frame body 4 as in this embodiment, an area where the shadow of the eaves 2 falls on the opening 1b due to sunlight (hereinafter referred to as a shaded area) may be created. This shaded area changes with the altitude of the sun, which changes from day to day. More specifically, when the sun is high in the sky, the shaded area extends to a lower position on the opening 1b than when the sun is low in the sky, and the area below that becomes an area where direct sunlight shines in (hereinafter referred to as a sunny area).

Traditionally, in order to lower the temperature inside the house in summer, the shoji screen 3a is opened to allow ventilation, and a light-blocking screen made of, for example, a fine-meshed cloth (hereinafter referred to as a shading screen) is hung from the upper outdoor-facing part of the opening 1b to block direct sunlight. However, shading screens are naturally poor at letting light through and providing poor ventilation. For this reason, if the entire opening 1b is covered with a shading screen, the room becomes dark and ventilation becomes poor, making it difficult to lower the temperature inside the house.

There are also screens that have different mesh sizes at the top and bottom, with a coarse mesh material on the top and a fine mesh material on the bottom, but because the position of the boundary between the different mesh sizes is predetermined, they cannot adapt to the changes in shady and sunny areas that occur depending on the altitude of the sun, and they are unable to efficiently ensure ventilation and lighting, or block out sunlight.

According to the roller blind unit 5 of this embodiment, the first screen 60 made of a material with high breathability and low light blocking properties and the second screen 70 made of a material with high light blocking properties and low breathability can be used by holding them in the appropriate position of the desired length. Therefore, in the case of the building 1 of this embodiment, where the upper side of the opening 1b is a shaded area and the lower side is a sunny area due to the eaves 2 provided above the opening 1b, as shown in Figures 6(a) and 6(b), it is possible to cover the shaded area with the first screen 60 and the sunny area with the second screen 70 by arranging the locking member 8 so that the second casing 71 is located at the boundary position between the shaded area and the sunny area. In this way, by covering the opening 1b with the first screen 60 and the second screen 70, it is possible to block sunlight that directly enters the room with the second screen 70 covering the sunny area, while ensuring ventilation and lighting inside the room with the first screen 60 covering the shaded area.

In addition, the roller blind unit 5 allows the mounting position of the locking member 8 that locks the second casing 71 to be changed in the vertical direction, so that the mounting position of the locking member 8 can be changed to match the shaded area when the sun is high in the sky, such as in summer, as shown in Figure 6(a), and when the sun is low in the sky, such as in spring and autumn, as shown in Figure 6(b), thereby ensuring efficient ventilation and lighting.

At this time, the mounting unit 9 that attaches the locking member 8 to the vertical frame 42 is fixed by clamping the vertical frame 42 in the projection direction and the cross direction by joining the first fixing member 91 and the second fixing member 92, so it is possible to attach the mounting unit 9 without drilling holes or the like in the vertical frame 42. Therefore, it is possible to easily change the position of the locking member 8 without compromising the design.

The second screen 70 can be held in a state where it is extended to the desired length by the clutch mechanism 73, so it can be held in a state where it is extended so as to cover only the sunny area where sunlight directly enters the room. Therefore, as shown in Figures 6(a) and 6(b), when it is not necessary to cover the opening 1b all the way to the bottom with the second screen 70 by blocking sunlight with the extended second screen 70, it is possible to ensure ventilation and lighting from below the opening 1b by stopping the second screen 70 at a position higher than the bottom end of the opening 1b.

In addition, since the lower end of the second screen 70 is not attached to the building, it is easy to move between indoors and outdoors by passing under the second screen 70 with the second screen 70 lowered, for example.

Furthermore, as shown in FIG. 6(c), when the sun is low in the sky, such as in winter, and it is desired to heat the interior of the room, it is possible to allow more solar radiation to enter the interior of the room by storing the first screen 60 in the first casing 62 and the second screen 70 in the second casing 71, respectively.
In addition, since the second casing 71 provided at the lower end of the first screen 60 is engaged and held by a locking member 8 provided on the building 1, the first screen 60 can be used in a stable condition.

In particular, since the roller blind unit 5 has a structure in which the second screen 70 is pulled out, a highly rigid member is used for the lower end portion of the first screen 60. Therefore, by stabilizing the lower end of the first screen 60 by engaging it with the engaging member 8, it is possible to prevent the first screen 60 from being blown around by wind or the like, thereby damaging the roller blind unit 5 or the building 1.

In the above embodiment, the locking member 8 is described as being movable in the vertical direction, but this is not limiting, and the locking member may be provided in multiple locations. In addition, the method of attaching the locking member 8 is not limited to the mounting unit 9, and may be, for example, directly screwed or glued, or in any other detachable form.

In the above embodiment, the eaves 2 has been described as an example of a structure that protrudes from the building 1 to the outdoors and creates a shaded area at the opening 1b due to sunlight, but the structure is not limited to this and may be a structure that protrudes from the building, such as an eaves or balcony, or a structure that is adjacent to the building, such as an eaves unit or a pergola. In other words, the structure that creates a shaded area at the opening due to sunlight is not limited to an eaves, and may be a structure that protrudes from the building to the outdoors or a structure that is adjacent to the building and separate from the building.
In the above embodiment, a fitting for a sliding window has been described as an example, but the fitting is not limited to this.

The above embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents.

The present embodiment includes at least the following inventions.
This roll screen unit comprises a first screen that is provided above an opening in a building, wound around a first rotating shaft, and unrolled so that its lower end is held in a predetermined position; and a second screen that is provided at the lower end of the first screen, wound around a second rotating shaft, and unrolled to an arbitrary length and held therein, wherein the first screen has higher breathability and lower light-blocking properties than the second screen.

With this type of roll screen unit, it is possible to use the first screen by unrolling it and holding the bottom end in a specified position, and the second screen by holding it in a state where it is unrolled to any length. In other words, it is possible to cover the upper side of the opening with the first screen, and the lower side with the second screen.

In addition, since the second screen can be extended and held at any desired length, in cases where it is possible to block sunlight entering the room without lowering the second screen all the way to the bottom of the opening, or in cases where the area at the bottom of the opening is shaded by objects installed nearby, it is possible to hold the second screen without covering the bottom of the opening. In such cases, it is possible to obtain ventilation and lighting even in the shaded area below the second screen. In this way, it is possible to provide a roll screen unit with superior ventilation, lighting, and sunlight blocking properties.

The roller blind unit is characterized in that it has a locking portion that is provided on the building and to which the lower end of the first screen is locked to hold the first screen in the specified position.
According to such a roller blind unit, the lower end of the first screen is engaged and held in place by a locking portion provided on the building, so the first screen can be used in a stable state. Since the roller blind unit has a structure in which the second screen is unrolled, a highly rigid member is used for the lower end of the first screen. Therefore, by stabilizing the lower end of the first screen by engaging it with the locking portion, it is possible to prevent the first screen from being blown about by wind or the like and damaging the roller blind unit or the building.

In such a roller blind unit, the locking portion is capable of changing its position in the up-down direction.
With this type of roller blind unit, the vertical position of the locking part can be changed, so the lower end of the first screen can be easily held in a desired position to cover the opening. Therefore, even if the area shaded by the opening changes due to seasonal changes in the altitude of the sun, the position of the locking part can be easily changed to match the area shaded by the opening.

The roller blind unit is characterized in that the locking portions are provided at a plurality of positions in the vertical direction.
With this type of roller blind unit, the locking portions are provided at multiple locations in the vertical direction, so that the lower end of the first screen can be locked to the desired locking portion to cover the area that is shaded by the opening.

In this type of roll screen unit, the second rotating shaft has a clutch mechanism that can switch between restricting rotation in the direction in which the second screen is rolled up and allowing the rotation, and the second screen is unrolled and held at the desired length by the clutch mechanism.

With this type of roll screen unit, the second screen can be unrolled to any length and held in place by the clutch mechanism, so it is possible to simply unroll the second screen and hold it in the desired length for use.

This roller blind unit is characterized in that it is installed above the opening and below a structure that creates a shaded area at the opening due to solar radiation.

With this type of roller blind unit, if there is a structure above the opening that creates a shaded area at the opening due to sunlight, the area above the opening will be shaded by sunlight and an area below will be sunny. For this reason, it is possible to cover the shaded area with the first screen and the sunny area with the second screen, with the boundary between the shaded area and the sunny area set as a predetermined position. In this case, since the first screen has higher breathability and lower light blocking properties than the second screen, it is possible to block sunlight entering the room with the second screen covering the sunny area, while ensuring ventilation inside the room with the first screen covering the shaded area. In addition, since the first screen has lower light blocking properties than the second screen, it is possible to take in more light inside than when the entire opening is covered with the second screen.

The area of the opening that is shaded changes depending on the altitude of the sun. That is, when the sun's altitude is high, the shaded area extends to a lower position of the opening than when the sun's altitude is low. Therefore, by aligning the specified position that holds the lower end of the first screen with the boundary between the shaded area and the sunny area, it is possible to ensure ventilation and lighting while blocking sunlight entering the building, even if the altitude of the sun changes.

In this way, by covering the opening with the first and second screens, for example in summer, the second screen covering the sunny area can block sunlight entering the room, while the first screen covering the shaded area can ensure ventilation and lighting inside the room. This makes it possible to efficiently lower the temperature inside the room.

1 Building, 1b Opening, 5 Roller screen unit, 8 Locking member,
60 First screen, 61 First shaft body, 70 Second screen, 72 Second shaft body,
73 clutch mechanism,

Claims (7)

Located above the opening of the building,
a first screen that is wound around a first rotating shaft and is unwound and has a lower end held in a predetermined position;
a second screen that is wound around a second rotating shaft provided at the lower end of the first screen and is unwound to an arbitrary length and held;
having
The first screen has higher breathability and lower light blocking ability than the second screen. The roller blind unit according to claim 1,
A roller blind unit which is provided on the building and has a locking portion to which the lower end of the first screen is locked to hold the first screen in the predetermined position. Located above the opening of the building,
a first screen that is wound around a first rotating shaft and is unwound and has a lower end held in a predetermined position;
A second screen is provided at the lower end of the first screen, wound around a second rotating shaft, and is unwound to an arbitrary length and held;
having
a locking portion provided on the building to which the lower end portion of the first screen is locked to hold the first screen in the predetermined position;
The first screen has higher breathability and lower light blocking ability than the second screen . The roller blind unit according to claim 2 or 3 ,
A roller blind unit, wherein the locking portion is capable of changing its position in the vertical direction. The roller blind unit according to claim 2 or 3 ,
A roller blind unit characterized in that the locking portions are provided at a plurality of positions in the vertical direction. A roller blind unit according to any one of claims 1 to 5 ,
the second rotating shaft has a clutch mechanism capable of switching between restricting rotation in a direction in which the second screen is rolled up and allowing the rotation,
A roller blind unit, wherein the second screen is unrolled to the desired length and held by the clutch mechanism. A roller blind unit according to any one of claims 1 to 6 ,
A roller blind unit that is provided above the opening and below a structure that creates a shaded area at the opening due to solar radiation.

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