JP5208993B2 - Natural light illumination structure and natural light illumination method for indoor space - Google Patents

Description

  The present invention relates to an indoor space area (for example, an elongated corridor space area, an escalator space area, etc.) provided with an opposing wall surface extending from the daylighting portion such as a window or a light duct and a ceiling surface corresponding to the wall surface. ) Natural light illumination structure and natural light illumination method.

  In particular, the entire corridor space such as the vicinity of the ceiling is well-lighted by forming a mirror surface on the upper part of the ceiling surface side of at least the opposing wall surfaces such as the corridor space area, and further making the ceiling surface a light diffusion surface such as white. In other words, it has a simple optical duct structure that extends from the section toward the interior back.

  Natural light entering from a daylighting unit such as a window is propagated to the back part of the hallway space area by the simple light ducting of the hallway space area and the like, and acts as an illumination source to the back part.

  In this specification, the width direction of indoor space areas such as corridors and escalators extending from the daylighting section to the interior depth direction is described as “left and right” and “horizontal”, and the vertical direction of the indoor space area is defined as necessary. Marked as “vertical”.

  Conventionally, there has been proposed a daylighting device that actively reflects natural light entering from a window (lighting unit) toward an indoor ceiling surface and ensures the brightness to the indoor back side portion by the scattering action of the natural light on the ceiling surface. (See Patent Document 1 below).

  In this lighting device, a plurality of slats extending in the left-right width direction are provided in a window (lighting unit) in the vertical direction at a predetermined interval, and the inclination angle of the reflecting surface that is the upper surface of each slat is different. It is

  That is, the upper slat irradiates the back part of the indoor ceiling surface (away from the window) with its own reflected light, and the lower slat has its own reflected light on the front part of the indoor ceiling surface (closer to the window). Is being irradiated.

JP 2004-363042 A

  In the case of such a conventional daylighting device that tries to secure the lighting effect of natural light entering from the window to the interior back part, the natural light is reflected toward the ceiling surface by a plurality of slats provided in the window portion, and the ceiling surface is reflected. The reflected light is scattered to brighten the interior.

Here, only the natural light scattering action on the ceiling surface is used in the ceiling surface and wall surface which are so-called components such as the corridor space.
That is, the idea of trying to propagate the natural light of the daylighting part to the inner part of the indoor space using the wall surface in the opposite state is not possible.

  Therefore, in the present invention, at least the upper part of the facing wall surface constituting the indoor space such as a corridor or escalator is a mirror surface, and light for reflecting natural light incident on the daylighting portion toward the mirror surface. Direction adjustment means is provided, which allows incident natural light from the daylighting part to propagate deeper in the upper part of the indoor space area while reflecting off the mirror surface of the opposing wall surface, thereby improving the efficiency of natural light illumination in the indoor space area. Objective.

  In addition, a light diffusing part consisting of a white portion or the like is formed on the ceiling surface of the indoor space area, thereby diffusing natural light that is difficult to propagate in the back direction on the ceiling surface (not the wall mirror surface) into the indoor space. The purpose is to realize the natural light illumination from the upper side with a little uncomfortable feeling on the user side, so that almost the entire upper side of the space area is an illumination source.

  Moreover, the non-mirror surface part of the opposing wall surface is set to a surface part with a color (light color) having a higher reflectance than the daylighting side part at the back part far from the daylighting part, and the extent to which natural light is transmitted thereby. The purpose is to ensure as much as possible the natural light illumination in the entire indoor space area by sufficiently ensuring the light emitting action (of natural light) in the back part which tends to be low.

The present invention solves the above problems as follows.
(1) Opposite wall surfaces (for example, below-described wall surfaces 1f, 1g, 1h) extending from the daylighting unit (for example, a later-described daylighting unit 3, light guide duct 6) to the interior depth direction thereof, and a ceiling surface corresponding to the wall surface (for example, In a natural light illumination structure in an indoor space area (for example, a corridor 1 described later) provided with a ceiling surface 1a, 1b, 1c described later,
Providing a light direction adjusting means (for example, light direction adjusting means 5 and 7 described later) for changing the propagation path of natural light incident on the daylighting portion to the direction of the wall surface;
Each of the wall surfaces is at least an upper portion on the ceiling surface side,
It has a mirror surface (for example, mirror surfaces 1j, 1k, 1m, and 1n described later) for allowing natural light emitted from the light direction adjusting means to propagate in the indoor depth direction while reflecting.
(2) In (1) above,
The ceiling surface is
Having a light diffusion part,
The light direction adjusting means includes
It also has a function of changing the natural light propagation path in the direction of the ceiling surface.
(3) In the above (1) and (2),
The wall surface is
The far part far from the daylighting part has a non-specular part set to a color having a higher reflectance than the daylighting part.
(4) In the above (1), (2), (3),
The light direction adjusting means includes
A light guide member (for example, an optical duct 5a, a horizontal blade unit 7a, and a vertical blade unit 7d, which will be described later), which has a mirror surface and is set to be opened from the outdoor side of the natural light incident source toward the indoor side of the reflection destination. Have
(5) Opposite wall surfaces (for example, below-described wall surfaces 1f, 1g, 1h) extending from the daylighting unit (for example, a later-described daylighting unit 3, light guide duct 6) to the interior back direction thereof, and a ceiling surface corresponding to the wall surface (for example, In a natural light illumination method in an indoor space area (for example, corridor 1 described later) provided with a mirror surface 1j, 1k, 1m, 1n described later,
Light direction adjusting means (for example, light direction adjusting means 5 and 7 described later) for changing the propagation path of natural light incident on the daylighting portion to the direction of the wall surface is provided, and at least the ceiling surface side of each of the wall surfaces is provided. By forming a mirror surface (for example, mirror surfaces 1j, 1k, 1m, 1n, which will be described later) for propagating the natural light emitted from the light-recording direction adjusting means to the indoor back direction while reflecting,
By the action of the light direction adjusting means, the propagation path after incidence of the natural light is changed to the direction of at least the upper part of the wall surface,
By the action of the mirror surface, the natural light after passing through the light direction adjusting means is reflected and propagated in the indoor depth direction.

  The present invention is directed to a natural light illumination structure and a natural light illumination method for an indoor space area configured as described above.

The present invention is based on the above problem solving means.
(11) Increasing the efficiency of natural light illumination in the indoor space area by reflecting the incident natural light from the daylighting part to the back of the indoor space area while reflecting off the mirror surface above the opposite wall surface,
(12) Using the entire upper side of the indoor space as the illumination source, we aim to realize natural light illumination from above with less user discomfort,
(13) Ensuring a sufficient amount of natural light illumination in the interior of the indoor space, ensuring sufficient light emission at the back of the indoor space where natural light is apt to be transmitted.
be able to.

It is explanatory drawing which shows indoor planes, such as a corridor used as the object of natural light illumination. It is explanatory drawing which shows the light direction adjustment means (the 1: horn type | mold optical duct) provided in the corridor lighting part. It is explanatory drawing which shows an example of the horn type | mold optical duct used with the light direction adjustment means of FIG. It is explanatory drawing which shows the light direction adjustment means (the 2: blade-type light grating) provided in the corridor lighting part. It is explanatory drawing which shows the braid | blade used with the light direction adjustment means of FIG. 4, (a) shows an example of the arrangement state of a several braid | blade, (b) has shown the braid | blade modification. It is explanatory drawing which shows the case where external natural light is taken in into a light direction adjustment means via a light guide duct. It is explanatory drawing which shows the state which provided the mirror surface and the concealment of the lower end side in the upper part (ceiling surface side part) of the wall surface of the corridor which has a flat ceiling. It is explanatory drawing which shows the state which provided the mirror surface in the wall surface upper part (ceiling surface side part) of the corridor which has the folding ceiling without a hollow part. It is explanatory drawing which shows the state which provided the mirror surface in the wall surface upper part (ceiling surface side part) of the corridor which has a folded-up ceiling with a hollow part.

  The form for implementing this invention is demonstrated using FIGS.

  Although the present invention is also intended for an indoor escalator space as described above, the following description assumes an indoor corridor for convenience of explanation.

  The components of the reference numbers with alphabets (for example, the ceiling surface 1a) used in FIGS. 1 to 9 are in principle part of the components (for example, the hallway 1) of the numeral portions of the reference numbers.

Regarding the indoor structure of FIGS.
1 is an indoor long and narrow corridor subject to natural light illumination.
1a is a first ceiling surface (flat ceiling) provided partly or entirely with a white portion or a satin-like portion for light diffusion,
1b is a second ceiling surface provided with a white portion or a satin-like portion for light diffusion in part or all of it (folded ceiling without a hollow portion: see FIG. 8),
1c is a third ceiling surface provided with a white portion or a satin-like portion for light diffusion in a part or all of it (folded ceiling with a recessed portion: see FIG. 9),
1d is a recessed portion set immediately below the left and right ends of the third ceiling surface 1c,
1e is the floor of corridor 1,
1f is a first wall surface in an opposing state set between the left and right edge portions of the first ceiling surface 1a and the floor surface 1e,
1g is a second wall surface in an opposing state set between the left and right edge portions of the second ceiling surface 1b and the floor surface 1e,
1h is a third wall surface in an opposed state set between the left and right edge portions of the third ceiling surface 1c and the floor surface 1e,
1j is a first mirror surface for light reflection provided immediately below the flat ceiling of the first wall surface 1f,
1k is a second mirror surface for reflecting light provided in a portion directly under the raised ceiling of the second wall surface 1g,
1 m is a third mirror surface for reflecting light provided at a portion directly below the raised ceiling of the third wall surface 1 h.
1n is a fourth mirror surface for light reflection provided in a range constituting the recessed portions 1d on the left and right ends of the third ceiling surface,
2 is a small concealment provided at the lower end of the first mirror surface 1j (see FIG. 7),
3 is a glass window type daylighting portion provided at both ends of the corridor 1 in the longitudinal direction;
3a is a pair of glass provided on the outdoor side and indoor side,
4 is an individual space area other than indoor corridors (individual indoor space areas such as office rooms, hot water rooms, toilets, etc.)
Respectively.

Moreover, regarding the light direction adjusting means of FIG. 2, FIG. 3 and FIG.
5 is a light direction adjusting means provided between the pair of glasses 3a and having a horn type light duct for changing the direction of the natural light entering the corridor from the daylighting section 3 (see FIG. 2),
5a is a component of the light direction adjusting means, the inner part is made of a mirror surface, and the cross-sectional area increases in the inner space area in the traveling direction of the carrier light, that is, it has a shape that opens forward from the outside to the inside. A horn-type optical duct that is set and is attached to a pedestal 5f described later,
5b is set in a shape inclined from a plane orthogonal to the axial direction of the optical duct 5a, and a light incident surface (see FIG. 3) that defines an incident light range that can be taken in by this inclined state.
5c is set in a shape inclined from a plane orthogonal to the axial direction of the optical duct 5a, and a light emitting surface (see FIG. 3) that defines the direction of the emitted light by this inclined state,
5d is a pair of left and right vertical struts for mounting optical ducts anchored to the corridor floor side and the corridor ceiling side, respectively.
5e is a horizontal support for attaching an optical duct screwed to each of the vertical supports 5d.
5f is a pedestal for mounting an optical duct screwed to each of the horizontal columns 5e,
6 is a well-known light guide duct (used only in FIG. 6) for taking outside natural light into the corridor,
θ1 is a natural light incident angle with respect to the axial direction of the optical duct 5a (used only in FIG. 3),
θ2 (<θ1) is a natural light emission angle with respect to the axial direction of the optical duct 5a (used only in FIG. 3).
Respectively.

Further, regarding the blade unit itself of the light direction adjusting means of FIGS. 4 and 5,
7 is a lattice-shaped blade (two horizontal blade units 7a + two vertical blade units 7d) provided between a pair of glasses 3a for changing the direction of natural light incident from the daylighting unit 3 into the corridor. ) Light direction adjusting means (see FIG. 4),
7a is set in the width direction (left-right direction) of the corridor 1, and a total of two horizontal blade units (a plurality of horizontal blades 7b + vertical support members 7c) each having a substantially half width of the corridor,
7b is a plurality of horizontal blades each having a mirror surface for reflection,
7c is a pair of left and right vertical support members each having a substantially U-shape, with both left and right ends of each horizontal blade 7b being attached.
7d is set in the height direction (vertical direction) of the corridor 1, and two vertical blade units (a plurality of vertical blades 7e + horizontal support members 7f) each having a substantially corridor width,
7e is a plurality of vertical blades each having a mirror surface for reflection,
7f is a pair of upper and lower horizontal support members each having a substantially U-shape, with both upper and lower ends of each vertical blade 7e attached thereto.
7g has the same light direction adjustment function as the plurality of horizontal blades 7b and vertical blades 7e, and includes a first mirror surface (plane portion) on the incident side and a second mirror surface (plane portion) on the emission side, and has a width. A plurality of deforming blades whose cross-sectional shape in the direction is set in an inverted “<” shape as shown in FIG.
7h is a narrow opening on the natural light incident side of each blade group such as a horizontal blade 7b, a vertical blade 7e, and a deforming blade 7g,
7j is a wide opening on the natural light exit side of the blade group,
Respectively.

Moreover, regarding the blade unit mounting mechanism of the light direction adjusting means of FIGS. 4 and 5,
8 is a pair of left and right vertical struts anchored to the hallway floor and hallway ceiling,
9 is an outdoor side frame structure for mounting the horizontal blade unit fixed to the vertical support 8, the corridor floor and the ceiling of the corridor,
9a is a substantially U-shaped outdoor side lower horizontal frame anchored to the corridor floor via a known spacer and screwed to the vertical column 8.
9b is a pair of substantially “ko” -shaped screws fixed to the vertical support column 8 and the outdoor lower horizontal frame 9a, and the like.
9c is an H-shaped central vertical frame screwed to the outdoor side lower horizontal frame 9a,
9d is each outdoor side vertical frame 9b, a central vertical frame 9c and a substantially “ko” type outdoor side upper horizontal frame screwed to the ceiling surface, etc.
10 is an outdoor side frame structure 9, an indoor side frame structure for fixing a vertical blade unit fixed to the floor surface of the hallway and the ceiling surface of the hallway,
10a is a substantially U-shaped indoor side lower horizontal frame anchored to the corridor floor via a known spacer and screwed to the outdoor side lower horizontal frame 9a;
10b is a pair of substantially “U” shaped screws that are screwed to each outdoor side vertical frame 9b and indoor side lower horizontal frame 10a, and the like.
10c is an H-shaped central horizontal frame that is screwed to the central vertical frame 9c and each indoor-side vertical frame 10b,
10d is an outdoor side upper horizontal frame 9d, each indoor side vertical frame 10b, a substantially “ko” -shaped indoor side upper horizontal frame screwed to the ceiling surface of the hallway,
Respectively.

Here, the mirror surfaces 1j, 1k, 1m, 1n on the wall ceiling side, the mirror surfaces of the optical duct 5a, and the mirror surfaces of the blades 7b, 7e, 7g are:
A mirror made of aluminum, a mirror made of stainless steel, a mirror made of resin subjected to vacuum metal deposition film processing of silver or aluminum, for example, a double-sided mirror.

  The vertical support 5d, the horizontal support 5e, the pedestal 5f and the vertical support 8, the outdoor side frame structure 9, and the indoor side frame structure 10 shown in FIG. 4 are made of aluminum, steel, or reinforced plastic.

The first feature of the natural light illumination according to the above embodiment is
(21) Mirror surfaces 1j, 1k, 1m, and 1n are respectively formed on the walls 1f, 1g, and 1h of the corridor 1 that are directly below the ceiling surface.
(22) Natural light that has entered the daylighting unit 3 and whose direction of travel has been changed by the light direction adjusting means 5 and 7 is propagated in the back direction of the hallway 1 while being reflected by these mirror surfaces.
That is.

  The light propagation in the direction toward the back of the corridor ensures an illumination (light emission) action based on natural light to a portion far from the daylighting section 3 of the elongated corridor 1.

  Moreover, since the setting place of the mirror surfaces 1j, 1k, 1m, and 1n is a portion directly below the ceiling surfaces 1a, 1b, and 1c, that is, a wall surface portion above the user of the hallway 1 (see FIGS. 7 to 9), The extent to which the mirror surface for reflecting light is annoying for the user is small.

  A second feature is that white surfaces for light diffusion are provided on the ceiling surfaces 1a, 1b, and 1c.

  That is, the natural light that has passed through the light ducts 5a of the light direction adjusting means 5 and the blades 7b, 7e, and 7g of the light direction adjusting means 7 to the white portions of the ceiling surfaces 1a, 1b, and 1c is also diffused there. Reflects and acts as an illumination source (light source) of the hallway 1.

  As described above, the natural light that has passed through the light direction adjusting means 5 and 7 is elongated by the reflection propagation action in the back direction based on the mirror surfaces 1j, 1k, 1m, and 1n and the diffuse reflection action on the ceiling faces 1a, 1b, and 1c. The sufficient lighting state of the whole corridor 1 of the aspect is ensured.

  As the individual optical ducts of the light direction adjusting means 5, for example, various horn type optical ducts proposed by the present applicant are used in addition to those shown in FIGS. 2 and 3 (see International Publication No. 2009/008159).

When using the optical duct 5a of FIG.
(31) A number of optical ducts having the same shape are attached in accordance with the position of the base 5f while appropriately changing the direction of the light emitting surface 5c with respect to the axial direction (= the normal direction of the light emitting surface).
(32) A number of light ducts having different shapes of the light exit surface 5c with respect to the axial direction are selectively attached according to the position of the base 5f.
Thus, the propagation destination of the natural light output from the light exit surface 5c of each light duct 5a to the inside of the corridor is set to the mirror surfaces 1j, 1k, 1m, 1n, the ceiling surfaces 1a, 1b, 1c, and the like.

  Here, the inside of each light duct 5a is made of a mirror surface, and the natural light incident on each light incident surface 5b propagates to the light emitting surface 5c on the opposite side while being reflected by the mirror surface, and the internal space area of the corridor 1 Is emitted.

  Each of the optical ducts 5a has a shape in which the cross-sectional area increases toward the traveling direction of natural light propagating therethrough, that is, the cross-sectional area from the narrow opening on the light incident surface side toward the wide opening on the light output surface side. Is set so as to increase, that is, in a so-called open-to-open shape.

  With this internal structure of the front opening, the outgoing angle θ2 of the light output from each optical duct becomes smaller than the incident angle θ1, and the directions of the outgoing light can be aligned. The incident angle θ1 and the emission angle θ2 are angles with respect to the optical duct axis direction described above.

  The reason why the emission angle θ2 is smaller than the incident angle θ1 is that the cross-sectional area of the optical duct increases in the traveling direction of the light transported inside each optical duct 5a. This is because every time natural light incident on the light beam is reflected by the inner surface of the optical duct, the angle formed with the optical duct axial direction becomes smaller.

  As individual lighting blades of the light direction adjusting means 7, in addition to those shown in FIGS. 4 and 5, for example, various lighting blades proposed by the applicant of the present application are used (see International Publication No. 2009/025089).

  As shown in FIG. 4, for example, the entire daylighting blade constituting the light direction adjusting means 7 includes a plurality of horizontal blades 7b and a plurality of vertical blades 7e each having a reflecting surface (mirror surface) and spaced apart from each other. It consists of a grid-like blade in a stacked form.

  Here, the horizontal blades 7b and the vertical blades 7e in FIG. 4 are arranged so that the emission side opening area of the light path formed by the adjacent blades is larger than the incident side opening area. (See FIG. 5).

  That is, like the optical duct 5a, each blade has a shape in which the width between adjacent blades increases from the narrow opening portion 7h on the light incident side toward the wide opening portion 7j on the light emission side. Is set to

  Then, as shown in FIG. 5, the natural light incident on the narrow opening 7h of the blade group having the tip opening structure is emitted from the wide opening 7j of the blade group in a diffused state.

  The emission range (diffusion range) of the natural light by the blade group is selected by fixing the inclination of the horizontal blade 7b with respect to the vertical support member 7c and the inclination of the vertical blade 7e with respect to the horizontal support member 7f. The propagation destination of natural light emitted from the wide opening 7j can be set to the mirror surfaces 1j, 1k, 1m, 1n, the ceiling surfaces 1a, 1b, 1c, and the like.

  In the case of the light direction adjusting means 7 shown in FIG. 4, the horizontal blade unit 7a mainly specifies the diffusion range of the emitted light in the vertical direction of the corridor, and the vertical blade unit 7d specifies the diffusion range of the emitted light in the horizontal direction of the corridor. ing.

  The horizontal blade unit 7a and the vertical blade unit 7d are created in advance at a factory or the like.

In order to attach these vertical and horizontal blade units 7a and 7d to the daylighting unit 3, for example,
(41) A pair of left and right vertical supports 8 are fixed to the ceiling surfaces 1a, 1b, 1c and the floor surface 1e,
(42) The outdoor side lower horizontal frame 9a, the outdoor side vertical frame 9b and the central vertical frame 9c at both left and right ends are fixed to the corridor floor 1e and the vertical column 8,
(43) The two horizontal blade units 7a are respectively inserted between the outdoor vertical frame 9b and the central vertical frame 9c, and the vertical support member 7c of the horizontal blade unit is placed on the outdoor vertical frame 9b and the central vertical frame 9c. Screw and
(44) The outdoor side upper horizontal frame 9d is fixed to the ceiling surfaces 1a, 1b, 1c, the outdoor side vertical frame 9b and the central vertical frame 9c,
(45) The indoor side lower horizontal frame 10a and the indoor side vertical frames 10b at both left and right ends are fixed to the hall floor 1e and the outdoor side lower horizontal frame 9a.
(46) One vertical blade unit 7d is placed between the pair of left and right indoor side vertical frames 10b, and the lower horizontal support member 7f (not shown) of the vertical blade unit is screwed to the indoor side lower horizontal frame 10a. And
(47) The central horizontal frame 10c is fixed to the horizontal support member 7f (not shown) on the upper side of the vertical blade unit, the central vertical frame 9c, and the indoor vertical frame 10b.
(48) The remaining one of the vertical blade units 7d is placed between the pair of left and right indoor side vertical frames 10b, and the lower horizontal support member 7f of the vertical blade unit is screwed to the central horizontal frame 10c.
(49) The indoor side upper horizontal frame 10d is fixed to the ceiling surfaces 1a, 1b, 1c, the upper horizontal support member 7f of the vertical blade unit, the outdoor side upper horizontal frame 9d and the indoor side vertical frame 10b.
It becomes the procedure.

  Also, the color of the wall surfaces 1f, 1g, 1h and the ceiling surfaces 1a, 1b, 1c of the corridor 1 is made lighter as it goes farther away from the daylighting unit 3. For example, the color gradually changes from dark gray to light gray. By changing the gradation, the light reflectance can be increased, and the dark lighting state in the back part of the hallway can be mitigated.

  Furthermore, the part close to the lighting part 3 of the ceiling surfaces 1a, 1b, and 1c can be made into a mirror surface, and the natural light propagation ability to the back part (far from the said lighting part) of the corridor 1 can be improved.

Of course, the present invention is not limited to the above embodiments, for example,
(51) A mirror surface is provided in any vertical range of the wall surfaces 1f, 1g, and 1h.
(52) Instead of the planar horizontal blade 7b and the vertical blade 7e, a blade whose cross-sectional shape in the width direction is a curved surface is used (see FIG. 6 of International Publication No. 2009/025089).
(53) As the light direction adjusting means 7, only one of the horizontal blade group and the vertical blade group is used.
(54) Various fixing means such as screwing, riveting, and adhesion are appropriately used when attaching each component of the light direction adjusting means 5 and 7;
(55) When the light direction adjusting means 5 and 7 are provided in a place where they cannot be reached or where there is little concern about contamination, the indoor side glass of the pair of glasses 3a is omitted and only the outdoor side glass is used. ,
(56) The entire light direction adjusting means 5 and 7 are installed outdoors without the glass 3a.
You may do it.

(Regarding the indoor structure of FIGS. 1 and 6 to 9)
1: Indoor long and narrow corridor 1a: First ceiling surface (flat ceiling)
1b: 2nd ceiling surface (folded ceiling without a hollow part)
1c: 3rd ceiling surface (folded ceiling with a hollow part)
1d: hollow portion 1e: floor surface 1f: first wall surface 1g: second wall surface 1h: third wall surface 1j: first mirror surface 1k for light reflection: second mirror surface 1m for light reflection: light reflection Third mirror surface 1n for light reflection: fourth mirror surface for light reflection 2: small edge concealment 3: glass window type daylighting portion 3a: pair of glasses 4: individual space area other than indoor corridor

(Regarding the light direction adjusting means of FIGS. 2, 3 and 6)
5: Light direction adjusting means 5a having a horn type light duct 5a: Horn type light duct 5b: Light incident surface 5c: Light emitting surface 5d: Vertical column 5e: Horizontal column 5f: Base 6: Light guide duct θ1: Natural light incident angle θ2: Natural light emission angle

(Regarding the blade unit itself of the light direction adjusting means in FIGS. 4 and 5)
7: Light direction adjusting means 7a having a grid-like blade: Horizontal blade unit (horizontal blade 7b + vertical support member 7c),
7b: Horizontal blade 7c: Vertical support member 7d: Vertical blade unit (vertical blade 7e + transverse support member 7f)
7e: Vertical blade 7f: Horizontal support member 7g: Deformation blade 7h: Narrow opening 7j: Wide opening

(Regarding the blade unit mounting mechanism of the light direction adjusting means in FIGS. 4 and 5)
8: Vertical column 9: Outdoor side frame structure 9a: Outdoor side lower horizontal frame 9b: Outdoor side vertical frame 9c: Center vertical frame 9d: Outdoor side upper horizontal frame 10: Indoor side frame structure 10a: Indoor lower frame 10b: Indoor side vertical frame 10c: Center horizontal frame 10d: Indoor side upper horizontal frame

Claims (5)

In a natural light illumination structure in an indoor space area provided with a facing wall surface extending from the daylighting portion in the indoor depth direction and a ceiling surface corresponding to the wall surface,
Providing a light direction adjusting means for changing the propagation path of natural light incident on the daylighting portion to the direction of the wall surface;
Each of the wall surfaces is at least an upper portion on the ceiling surface side,
It has a mirror surface for propagating in the indoor back direction while reflecting natural light emitted from the light direction adjusting means,
A natural light illumination structure for indoor spaces. The ceiling surface is
Having a light diffusion part,
The light direction adjusting means includes
The natural light propagation path is also equipped with a function to change the direction of the ceiling surface,
The natural light illumination structure for indoor space according to claim 1. The wall surface is
The back part far from the daylighting part has a non-specular part set to a color having a higher reflectance than the daylighting part,
The natural light illumination structure for indoor space according to claim 1 or 2. The light direction adjusting means includes
It has a light guide member that is made of a mirror surface and is set in a state of being opened from the outdoor side from which the natural light is incident toward the indoor side of the reflection destination.
The natural light illumination structure in an indoor space area according to any one of claims 1 to 3. In a natural light illumination method for an indoor space area provided with a facing wall surface extending from the daylighting section in the indoor depth direction and a ceiling surface corresponding to the wall surface,
A light direction adjusting means for changing the propagation path of natural light incident on the daylighting portion to the direction of the wall surface is provided, and at least an upper portion on the ceiling surface side of each wall surface is emitted from the light direction adjusting means. By forming a mirror surface for propagating in the indoor back direction while reflecting natural light to
By the action of the light direction adjusting means, the propagation path after incidence of the natural light is changed to the direction of at least the upper part of the wall surface,
Due to the action of the mirror surface, the natural light after passing through the light direction adjusting means is reflected and propagated in the interior back direction.
A natural light illumination method for indoor spaces.

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