JP7041954B2 - Dimmable roll screen and its manufacturing method - Google Patents

Description

The present invention relates to a dimmable roll screen capable of adjusting the amount of light taken in, and a method for manufacturing the same.

Various dimmable roll screens have been proposed that can adjust the amount of light taken into the room.

For example, in FIG. 1 of Patent Document 1, a transmissive portion 122 (translucent portion) and a non-transmissive portion 124 (light-shielding portion) are provided on a front-rear double screen 120 that can be wound around a take-up pipe 110 (winding roller). When the front translucent portion 122 and the rear translucent portion 122 overlap each other in the front-rear direction, the light is collected, and when the translucent portion 122 and the light-shielding portion 124 overlap each other, the light is shielded. A dimmable roll screen that is ready for use has been proposed. In the following, a dimming roll screen in which the screen 120 has a two-layer structure, such as the dimming roll screen of Patent Document 1, may be referred to as a “two-layer type dimming roll screen”.

Further, in FIG. 3 of Patent Document 2, the screen has a front fabric 7 (front translucent film material) forming the front surface (front surface) thereof and a back fabric 9 (rear translucent film material) forming the back surface (rear surface) thereof. A dimmable roll screen composed of a film material) and a plurality of inner fabrics 8 (light-shielding film materials) arranged between the front-side translucent film material 7 and the rear-side translucent film material 9 has been proposed. .. As shown in FIG. 4 of the same document, this dimmable roll screen has a light-shielding state in which each light-shielding film material 8 stands up and the amount of light taken in from the rear side to the front side of the screen is minimized. As shown in FIG. 2 of the same document, each light-shielding film material 8 is in a lying state, and it is possible to switch between a lighting state in which the amount of light taken in from the rear side to the front side of the screen increases. .. In the following, a dimming roll screen in which the screen 120 has a three-layer structure, such as the dimming roll screen of Patent Document 2, may be referred to as a “three-layer type dimming roll screen”.

Japanese Unexamined Patent Publication No. 2018-003541 Japanese Unexamined Patent Publication No. 2017-044054

However, in the two-layer type dimmable roll screen as in Patent Document 1, it is necessary to make the dimensions and shapes of the light-transmitting portion 122 and the light-shielding portion 124 which overlap each other in the front-rear state in the light-shielding state. Therefore, the two-layer type dimmable roll screen as in Patent Document 1 has a drawback that it can collect light only in about half the area of the screen 120 even in the daylighting state. Further, the two-layer type dimmable roll screen as in Patent Document 1 has a structure in which a wide gap in the front-rear direction is formed between the front fabric and the rear fabric in the screen 120 even in a light-shielded state. It was. Therefore, the two-layer type dimmable roll screen as in Patent Document 1 has a drawback that the light leaks to the indoor side through the above-mentioned gap even in a light-shielded state, and the indoor cannot be made into a dark room state. Was there.

On the other hand, the three-layer type dimming roll screen as in Patent Document 2 performs dimming by changing the standing angle of the light-shielding film material 8, and therefore, in the daylighting state, it is a two-layer type. It has the advantage that it is possible to collect light in a wider range than the dimmable roll screen. Further, in a three-layer type dimmable roll screen as in Patent Document 2, the gap in the front-rear direction between the front translucent film material 7 and the rear translucent film material 8 is narrowed in a light-shielded state, so that light is collected. In the state, it also has the advantage that the room can be darkened more than the two-layer type dimmable roll screen.

In this way, the three-layer type dimmable roll screen can not only brighten the room but also darken the room, and the range of dimming is wider than that of the two-layer type dimmable roll screen. Has advantages. However, even with a three-layer type dimmable roll screen, light leaks slightly from the gaps between the light-shielding film materials 8 adjacent to each other in the vertical direction in the light-shielding state, and when the screen is viewed from the indoor side (front side), A bright portion (bright portion) was formed in a streak pattern at the boundary portion of the light-shielding film materials 8 adjacent to each other in the vertical direction. In recent years, an increasing number of hotels are considering replacing curtains in guest rooms with dimmable roll screens, but many hotels want to be able to make the room dark in a light-shielded state, as described above. The number of hotels and the like that led to the introduction of dimmable roll screens in which bright areas are formed in stripes even in a light-shielded state was limited.

The present invention has been made to solve the above-mentioned problems, and it is difficult for bright portions to be formed in a streak shape at the boundary portion of the light-shielding film materials adjacent to each other in the vertical direction in the light-shielding state, and the room is brought closer to the dark room state. It provides a three-layer type dimmable roll screen that can be used. It is also an object of the present invention to provide a method for manufacturing this dimmable roll screen.

The above issues are
A screen to cover the lighting opening,
It is equipped with a winding roller for winding the screen on the upper side of the lighting opening.
The screen is
The front translucent film material that forms the front surface of the screen (the surface facing the indoor side; the same applies hereinafter),
The posterior translucent film material that forms the posterior surface of the screen (the surface facing the outdoor side; the same shall apply hereinafter).
It is composed of a plurality of light-shielding film materials arranged substantially in parallel with a predetermined interval in the vertical direction within the gap between the front-side translucent film material and the rear-side translucent film material.
The leading edge portion of each light-shielding film material is a front-side connecting portion polymerized and connected to the front light-transmitting film material, and the trailing edge portion of each light-shielding film material is polymerized and connected to the rear light-transmitting film material. It is said to be the rear connecting part,
By changing the relative position (vertical position or front-back position) of the front translucent film material with respect to the rear translucent film material,
The leading edge portion of each light-shielding film material descends with respect to the trailing edge portion, and each light-shielding film material stands up, and the gap between the light-shielding film materials adjacent to each other in the vertical direction is the minimum (adjacent in the vertical direction). Including the state where there is no gap between the light-shielding film materials), and the light-shielding state where the amount of light taken in from the rear side to the front side of the screen is minimized.
The leading edge of each light-shielding film rises with respect to the trailing edge, and each light-shielding film is laid down, the gap between adjacent light-shielding film materials in the vertical direction widens, and the rear of the screen. It is a dimmable roll screen that can switch between the lighting state where the amount of light taken in from the side to the front side increases.
In the light-shielding state, the upper edge of the rear connecting portion of each light-shielding film material is located above the upper edge of the front-side connecting portion of the light-shielding film material arranged on the upper side of each light-shielding film material. It is solved by providing a dimmable roll screen characterized by what has been done.

In this way, in the light-shielding state, the upper edge of the rear-side connecting portion of each light-shielding film material is above the upper edge of the front-side connecting portion of the light-shielding film material arranged on the upper side of each light-shielding film material. By locating the light, it is possible to prevent light from entering the gaps between the light-shielding film materials adjacent to each other in the vertical direction in the light-shielding state. In other words, the amount of light leaking to the front side of the screen in a light-shielded state can be suppressed. Therefore, when the screen is viewed from the indoor side (front side), it is possible to prevent the bright portion from being formed in a streak pattern at the boundary portion of the light-shielding film materials adjacent to each other in the vertical direction, and to bring the indoor closer to the darkroom state.

In the dimmable roll screen of the present invention, the vertical width of the rear connecting portion of each light-shielding film material is not particularly limited. However, in the conventional three-layer type dimming screen (dimming roll screen of Patent Document 2), the vertical width of the rear connecting portion is at most about 5 mm, but it is preferable to set this to 7 mm or more. .. This makes it possible to further prevent light from leaking to the indoor side (front side) of the screen in a light-shielded state. The vertical width of the rear connecting portion is more preferably 8 mm or more, and further preferably 9 mm or more.

On the other hand, the upper limit of the vertical width of the rear connecting portion varies depending on the arrangement pitch of the light-shielding film material in the vertical direction and is not particularly limited. However, if the vertical width of the rear connecting portion is made too large, not only the amount of light taken into the room side decreases in the lighting state, but also the rear connecting portion becomes conspicuous, and the dimmable roll screen in the lighting state There is also a risk that the appearance will deteriorate. Therefore, the vertical width of the rear connecting portion is usually 30 mm or less. The vertical width of the rear connecting portion is preferably 25 mm or less, more preferably 20 mm or less, and further preferably 15 mm or less.

In the dimmable roll screen of the present invention, in a light-shielding state, the upper edge of the rear-side connecting portion of each light-shielding film material is placed on the upper side of each light-shielding film material, and the front-side connecting portion of the light-shielding film material is arranged. The height above the upper edge is not particularly limited. However, in order to make it more difficult for light to leak to the indoor side in the light-shielding state, the upper edge of the rear connecting portion of each light-shielding film material is arranged one upper side of each light-shielding film material in the light-shielding state. It is preferable that the light-shielding film material is higher than the upper edge of the front connecting portion by 2 mm or more, more preferably 3 mm or more, and further preferably 4 mm or more. In the following, the height of the upper edge of the rear connecting portion of each light-shielding film material from the upper edge of the front connecting portion of the light-shielding film material arranged on the upper side of each light-shielding film material in the light-shielding state. May be referred to as "the protruding height of the rear connecting portion in a light-shielded state".

The upper limit of the protruding height of the rear connecting portion in the light-shielding state varies depending on the arrangement pitch of the light-shielding film material in the vertical direction and the like, and is not particularly limited. However, if the protruding height of the rear connecting portion in the light-shielded state is made too large, not only the amount of light taken into the room side decreases in the lighting state, but also the rear connecting portion becomes conspicuous, and dimming in the lighting state. There is also a risk that the appearance of the type roll screen will deteriorate. Therefore, the protruding height of the rear connecting portion in the light-shielded state is preferably 20 mm or less. The protruding height of the rear connecting portion in the light-shielded state is more preferably 15 mm or less, and further preferably 10 mm or less.

By the way, in the dimmable roll screen of the present invention, as described above, in the light-shielding state, the upper edge of the rear connecting portion of each light-shielding film material is arranged on the upper side of each light-shielding film material. It is located above the upper edge of the front connection part of the light-shielding film material (so that the rear connection part of the light-shielding film material extends to a higher position than the conventional three-layer type dimmable roll screen. I made it). Therefore, in the dimming type roll screen of the present invention, there is a possibility that the rear connecting portion of the light-shielding film material can be easily seen from the front as compared with the conventional three-layer type dimming type roll screen in the lighting state. Since the rear connecting portion is a portion where the light-shielding film material and the rear translucent film material are overlapped with each other, the rear connecting portion may appear darker than the other portions, and the rear connecting portion may be visible in the lighting state. Then, the dimmable roll screen looks bad. This deterioration in appearance in the lighting state can be solved by adopting the following configuration.

That is,
Front-rear width W ₁ of the portion of the light-shielding film material located between the front-side translucent film material and the rear-side translucent film material (front-rear width when the light-shielding film material is stretched straight in the front-rear direction. The same applies hereinafter) Is set to be larger _than the distance D1 between the front translucent film material and the rear translucent film material in the light collection state.
The light-shielding film material in the daylighting state has an upper curved portion that curves upward on the front edge side of the light-shielding film material and a lower side that curves downward on the trailing edge side of the light-shielding film material. Make sure that the curved part is formed
When the screen in the daylighted state is viewed from the front, it is preferable that the rear connecting portion of each light-shielding film material is hidden behind the upper curved portion of each light-shielding film material.

As a result, in the lighting state, the rear connecting portion of each light-shielding film material can be naturally hidden by the upper curved portion of each light-shielding film material, and the deterioration of the appearance of the dimmable roll screen can be suppressed. Will be possible.

In the dimmable roll screen of the present invention, even if the screen is a separately formed front translucent film material, a rear translucent film material, and a light-shielding film material, which are later connected by stitching, welding, or the like. good. However, in the dimmable roll screen of the present invention, in a light-shielding state, the upper edge of the rear-side connecting portion of each light-shielding film material is arranged on the upper side of each light-shielding film material on the front side of the light-shielding film material. It is designed to be located above the upper edge of the portion, and relatively high dimensional accuracy is required for each member constituting the screen. For this reason, in the method of connecting the front light-transmitting film material, the rear light-transmitting film material, and the light-shielding film material separately formed, the light-shielding film material for the front-side light-transmitting film material and the rear-side light-shielding film material is used. It takes a lot of labor for positioning.

Therefore, in the dimmable roll screen of the present invention, it is preferable to form the screen by integrally weaving the front translucent film material, the rear translucent film material, and the light-shielding film material by a weaving machine. This makes it possible to position the light-shielding film material with high accuracy with respect to the front-side translucent film material and the rear-side translucent film material. In this case, the woven screen needs to be cut into an accurate rectangle whose upper and lower edges are parallel to the light-shielding film material with high accuracy. For such high-precision cutting, the woven screen is placed on a table with tension applied to the screen, and the orientation of the screen is switched between the upper and lower edges and the side edges on both sides thereof. It can be realized by cutting without. If air is taken from a large number of intake portions provided on the upper surface of the table and the screen is cut while being attached to the upper surface of the table, the screen can be cut with higher accuracy.

As described above, according to the present invention, it is difficult for bright parts to be formed in a streak pattern at the boundary between the light-shielding film materials adjacent to each other in the vertical direction in the light-shielding state, and the room can be made closer to the dark room state by the three-layer type dimming type. It will be possible to provide roll screens. It is also possible to provide a method for manufacturing this dimmable roll screen.

It is a figure which showed the dimming type roll screen of this invention, and is the perspective view which showed the state which the light-shielding film material was lying down and was in a daylighting state, and was seen from the front diagonally upper right. It is a figure which showed the dimming type roll screen of this invention, and is the side view which showed the state which was seen from the side when the light-shielding film material was lying down and was in a daylighting state. It is a figure which showed the dimming type roll screen of this invention, and is the perspective view which showed the state which was seen from the front diagonally upper right when the light-shielding film material was standing and is in the light-shielding state. It is a figure which showed the dimming type roll screen of this invention, and is the side view which showed the state which was seen from the side when the light-shielding film material was standing and is in a light-shielding state. It is a figure explaining the state transition of the dimming type roll screen of this invention.

A preferred embodiment of the dimmable roll screen of the present invention will be described more specifically with reference to the drawings. Needless to say, the configuration described below is described as an example until it gets tired, and the technical scope of the dimmable roll screen of the present invention is not limited to the configuration described below. The dimmable roll screen of the present invention can be appropriately modified from the configuration described below as long as the gist of the invention is not impaired.

1 to 4 are views showing the dimmable roll screen 10 of the present invention, FIGS. 1 and 2 show the light-shielding film material 11c lying down and in a daylighting state, and FIGS. 3 and 4 show the light-shielding state. It shows the case where the film material 11c stands and is in a light-shielding state. Of these, FIGS. 1 and 3 are drawn as a perspective view of the dimming roll screen 10 as viewed diagonally from the upper right to the front, and FIGS. 2 and 4 are side views of the dimming roll screen 10 as viewed from the side. I'm drawing. However, in FIGS. 2 and 4, for convenience of drawing, the rotation operating means 13 and the friction wheel 14 shown in FIGS. 1 and 3 are not shown.

The dimmable roll screen 10 of the present invention is usually arranged on the front side (indoor side) of a daylighting opening such as a window. As shown in FIG. 1, the dimmable roll screen 10 of the present invention includes a screen 11 and a winding roller 12.

The screen 11 is for covering the lighting opening. A bottom rail 15 is attached to the lower edge of the screen 11. The bottom rail 15 maintains the shape of the lower edge of the screen 11 and applies downward tension to the screen 11 so that the screen 11 hanging from the winding roller 12 is extended.

The winding roller 12 is for winding the screen 11. The winding roller 12 is usually housed inside a head box (not shown), and is placed on the upper side (not shown) of the lighting opening via a mounting bracket (not shown) provided in the head box. It is attached (near the upper edge of the lighting opening). When the winding roller 12 winds up the screen 11, the screen 11 rises and the lighting opening is not blocked by the screen 11, and when the winding roller 12 unwinds the screen 11, the screen 11 descends. The lighting opening is covered with the screen 11.

The winding roller 12 is used to rotate the winding roller 12 in the forward direction (direction of arrow A1 in FIG. ₁ ) and in the reverse direction (direction of arrow _A2 in FIG. ₁ ) around the center line L1. The rotation operating means 13 is provided. The type of the rotation operating means 13 is not particularly limited as long as it can rotate the winding roller 12. In the dimmable roll screen 10 of the present embodiment, a linear member such as a string or a ball chain formed in an annular shape (hereinafter, may be referred to as an "operation string") is used as the rotation operation means 13. There is.

A friction wheel 14 is provided at one end of the winding roller 12, and the upper end side of the annular operation string 13 described above is wound around the friction wheel 14. Therefore, when the portion of the annular operation string 13 that hangs down toward the front side (front side) is pulled downward, the friction wheel ₁₄ rotates in the forward direction A1 and the winding roller 12 is interlocked with the friction wheel 14. _Is also designed to rotate in the forward direction A1. On the contrary, when the portion of the annular operation string 13 that hangs down to the back side (rear side) is pulled downward, the friction wheel 14 rotates in the reverse direction _A2 and is interlocked with the friction wheel 14. The winding roller 12 also rotates in the reverse direction _A2 .

The dimmable roll screen 10 of the present invention is a three-layer type. That is, in the dimmable roll screen 10 of the present invention, as shown in FIG. 2, the screen 11 has a front translucent film material 11a forming the front surface (the surface facing the indoor side) of the screen 11 and the rear surface of the screen 11. Approximately parallel with a predetermined distance in the vertical direction within the gap between the posterior translucent film material 11b forming (the surface facing the outdoor side), the front translucent film material 11a, and the posterior translucent film material 11b. It is composed of a plurality of light-shielding film materials 11c arranged in the above. The front translucent film material 11a hangs down from the _point P1 on the outer peripheral surface of the winding roller 12, and the rear translucent film material 11b is _behind the point P1 on the outer peripheral surface of the winding roller 12 (in order). It hangs down from a point P2 located _on the _side of the direction A1).

Further, the front edge portion of each light-shielding film material 11c is a front-side connecting portion 11c ₁ (a portion between the points _Q1 and Q2 in FIG. ₂ ) which is polymerized and connected to the front-side translucent film material 11a. The vertical position and the front-rear position of the front edge portion of each light-shielding film material 11c change according to the vertical displacement and the front-rear displacement of the front light-transmitting film material 11a. On the other hand, the trailing edge portion of each light-shielding film material 11c is a rear-side connecting portion 11c ₂ (a portion between the points _R1 and _R2 in FIG. 2) which is polymerized and connected to the rear-side translucent film material 11b. ), And the vertical position and front-rear position of the trailing edge portion of each light-shielding film material 11c changes according to the vertical displacement and the front-rear displacement of the rear-side translucent film material 11b. Therefore, in the dimmable roll screen 10 of the present invention, by rotating the winding roller 12 in the forward direction A ₁ or the reverse direction A ₂ , the state changes as shown in FIG. There is.

FIG. 5 is a diagram illustrating a state transition of the dimmable roll screen 10 of the present invention. In FIG. 5, as in FIGS. 2 and 4, the views of the rotation operating means 13 and the friction wheel 14 shown in FIGS. 1 and 3 are omitted.

5 (a) shows how the screen ₁₁ is completely wound in the forward direction A1 with respect to the winding roller 12, and FIG. 5 (b) shows the winding roller from the state shown in FIG. 5 (a). In the process of unwinding the screen 11 by rotating 12 in the reverse direction _A2 , FIG. 5C shows that the winding roller 12 is further rotated in the reverse direction _A2 from the state shown in FIG. 5B. In FIG. 5 (d), the winding roller 12 was further rotated in the reverse direction _A2 from the state shown in FIG. 5 (c) to put the screen 11 in a semi-illuminated state. FIG. 5 (e) shows a state in which the winding roller 12 is further rotated in the reverse direction _A2 from the state shown in FIG. 5 (d) to bring the screen 11 into the maximum light collection state.

Then, in FIG. 5 (f), the winding roller 12 is further rotated in the reverse direction A ₂ from the state shown in FIG. 5 (e), and the screen 11 is in the lighting state in the reverse direction A ₂ with respect to the winding roller 12. In FIG. 5 (g), the winding roller 12 is further rotated in the reverse direction _A2 from the state shown in FIG. 5 (f), and the screen 11 is in the lighting state. In FIG. 5 (h), the winding roller 12 is further rotated in the reverse direction _A2 from the state shown in FIG. 5 (g), and the screen 11 is wound with respect to the winding roller 12. It shows how it is completely wound up in the reverse direction _A2 . When the winding roller ₁₂ is rotated in the forward direction A1 from the state shown in FIG. 5 (h), the dimmable roll screen 10 changes from the state shown in FIG. 5 (h) to FIGS. 5 (g) and 5 (f). ), (E), (d), (c), (b) are followed in this order, and finally, the state shown in FIG. 5 (a) is obtained.

What should be noted here is the change in the light-shielding film material 11c in FIGS. 5 (c), (d), and (e). That is, in the state shown in FIG. 5C, the front light-transmitting film material 11a and the rear light-transmitting film material 11b approach each other, the gap (gap in the front-rear direction) becomes narrow, and the light-shielding film material 11c The leading edge portion (front side connecting portion 11c ₁ (see FIGS. 3 and 4)) descends significantly downward relative to the trailing edge portion (rear side connecting portion 11c ₂ ) of each light-shielding film material 11c. It is in a state. Therefore, each light-shielding film material 11c is in a standing state so as to be substantially parallel to the vertical direction.

FIG. 4 corresponds to an enlarged view of FIG. 5 (c). Looking at FIG. 4, the upper edge portion (trailing edge portion) of each light-shielding film material 11c is the light-shielding film material 11c. It overlaps with the rear side of the lower edge portion (leading edge portion) of the light-shielding film material 11c located one above. Therefore, when the screen 11 in the state shown in FIG. 4 (FIG. 5 (c)) is viewed from the front side, there is no gap (region in which the light-shielding film material 11c does not exist) between the vertically adjacent light-shielding film materials 11c. It has become like. In addition, in the state shown in FIG. 4 (FIG. 5 (c)), the gap in the front-rear direction between the front translucent film material 11a and the rear translucent film material 11b is also narrow, so that the vertical direction is within the gap. The gap in the front-rear direction of the light-shielding film material 11c adjacent to the light-shielding film material 11c is also narrowed. Therefore, in the state shown in FIG. 4 (FIG. 5 (c)), a state (light-shielding state) in which light is most difficult to transmit from the rear side (outdoor side) to the front side (indoor side) of the screen 11 appears.

On the other hand, in the state shown in FIG. 5 (d), the front translucent film material 11a moves relatively forward with respect to the posterior translucent film material 11b as compared with the state shown in FIG. 5 (c). , The gap between the front translucent film material 11a and the rear translucent film material 11b in the front-rear direction becomes wide, and the front edge portion of each light-shielding film material 11c (front side connecting portion 11c ₁ (see FIGS. 3 and 4)). ) Is moved forward relative to the trailing edge portion (rear side connecting portion 11c ₂ (see FIGS. 3 and 4)) of each light-shielding film material 11c. Therefore, each of the light-shielding film materials 11c is in a sleeping state rather than the state shown in FIG. 5 (c). When the screen 11 in the state shown in FIG. 5D is viewed from the front side, the gap α can be seen between the light-shielding film materials 11c adjacent to the top and bottom. Therefore, in the state shown in FIG. 5D, a state in which light is transmitted to some extent from the rear side (outdoor side) to the front side (indoor side) of the screen 11 (semi-lighting state) appears.

Further, in the state shown in FIG. 5 (e), the front translucent film material 11a moves relatively forward and upward with respect to the posterior translucent film material 11b as compared with the state shown in FIG. 5 (d). The gap between the front light-transmitting film material 11a and the rear light-transmitting film material 11b in the front-rear direction is further widened, and the front edge portion (front connecting portion 11c ₁ ) of each light-shielding film material 11c is a light-shielding film. It is in a state of being relatively forward and upward with respect to the trailing edge portion (rear side connecting portion 11c ₂ ) of the material 11c. Therefore, each of the light-shielding film materials 11c is in a more laid-down state (a state in which it is laid down in a substantially horizontal direction) than in the state shown in FIG. 5 (d). When the screen 11 in the state shown in FIG. 5 (e) is viewed from the front side, the gap α can be seen in a wide vertical width at the boundary portion of the light-shielding film material 11c adjacent to the top and bottom. Therefore, in the state shown in FIG. 5 (e), a state in which a large amount of light is transmitted from the rear side to the front side of the screen 11 (maximum lighting state) appears.

In the dimming roll screen 10 of the present embodiment, when the winding roller 12 is rotated in the reverse direction _A2 from the lighting state shown in FIG. 5 (e), FIGS. 5 (f), (g), and (h) are rotated. ), The screen 11 can be wound around the winding roller 12 in the lighting state.

As described above, in the dimmable roll screen 10 of the present invention, the relative position (front-back position or vertical position) of the front translucent film material 11a with respect to the rear translucent film material 11b is changed to change the position (front-back position or vertical position) of the light-shielding film material 11c. By changing the standing angle, the width of the gap α between the light-shielding film materials 11c adjacent to each other in the vertical direction is adjusted, and the amount of light transmitted from the rear side to the front side of the screen 11 through the gap α is adjusted in a wide range. You can do it. The standing angle of the light-shielding film material 11c is in a state between FIG. 5 (c) and FIG. 5 (e) when the front translucent film material 11a of the screen 10 is completely unwound from the winding roller 12. When), it can be adjusted by rotating the winding roller 12.

By the way, as already described, the light-shielding state shown in FIG. 5C is the state in which light is most difficult to transmit from the rear side to the front side of the screen 11. However, even in this light-shielding state, light slightly leaks from a slight gap between the light-shielding film materials 11c adjacent to each other in the vertical direction, and when the screen 11 is viewed from the indoor side (front side), the light-shielding films adjacent to each other in the vertical direction are slightly leaked. There is a possibility that a bright portion (bright portion) is formed in a streak shape at the boundary portion of the material 11c. In this respect, in the dimmable roll screen 10 of the present invention, by applying the following measures, light leakage at the boundary portion of the light shielding film materials 11c adjacent to each other in the vertical direction is suppressed in the light shielding state, and the room is darker. I am trying to be able to.

That is, in the light-shielding state shown in FIG. 4, the upper edge (point _R1 ) of the rear connecting portion 11c ₂ in each light-shielding film material 11c is arranged on the upper side of each light-shielding film material 11c. It is located above the upper edge (point Q ₁ ) of the front connecting portion 11c ₁ of 11c (height H ₁ in FIG. 4 is made larger than 0 mm). As a result, the gap formed between the light-shielding film materials 11c adjacent to each other in the vertical direction in the light-shielding state is further reduced, and when the screen 11 is viewed from the indoor side (front side), the light-shielding film materials 11c adjacent to each other in the vertical direction are obtained. It is possible to prevent the bright part from being formed in a streak pattern at the boundary portion of the screen. The rear connecting portion of the light-shielding film material 11c arranged one below each light-shielding film material 11c from the upper edge (point _Q1 ) of the front-side connecting portion 11c ₁ of each light-shielding film material 11c in the light-shielding state. The height H ₁ to the upper edge (point R ₁ ) of 11c is not particularly limited, but the dimmable roll screen 10 of the present embodiment secures 5 mm or more.

In the light-shielding state shown in FIG. 4, the lower edge (point _R2 ) of the rear connecting portion 11c ₂ in each light-shielding film material 11c is the light-shielding film material 11c arranged on the upper side of each light-shielding film material 11c. It may be located above the lower edge (point Q ₂ ) of the front connecting portion 11c ₁ , but the lower edge (point Q ₂ ) of the front connecting portion 11c ₁ of the light-shielding film material 11c arranged one above. ), Or slightly below. The front connecting portion 11c ₁ is a portion where the front translucent film material 11a and the light-shielding film material 11c overlap, and the rear connecting portion 11c ₂ is a portion where the rear translucent film material 11b and the light-shielding film material 11c overlap. Since it is _a portion, the front connecting portion 11c ₁ and the rear connecting portion 11c ₂ are portions where the fabric is doubled and it is particularly difficult for light to pass through. This is because by completely overlapping the front side of No. ₂ , it is possible to more reliably suppress light leakage at the boundary portion of the light shielding film materials 11c adjacent to each other in the vertical direction in the light shielding state.

The vertical width (length of the section R ₁ R ₂ ) of the rear connecting portion 11c ₂ in each light-shielding film material 11c is not particularly limited as long as the height H ₁ can be made larger than 0 mm. As already mentioned, the vertical width of the rear connecting portion 11c ₂ is preferably in the range of 7 to 25 mm, more preferably in the range of 8 to 20 mm, and further preferably in the range of 9 to 15 mm. preferable. In the dimmable roll screen 10 of the present embodiment, the vertical width of the rear connecting portion 11c ₂ is about 10 mm.

The vertical width (length of the section Q ₁ Q ₂ ) of the front connecting portion 11c ₁ in each light-shielding film material 11c is also not particularly limited. However, the front connecting portion 11c ₁ is a portion in which the front translucent film material 11a and the light-shielding member 11c are overlapped, and has a higher light-shielding property than other portions in the front translucent film material 11a and the light-shielding member 11c. In addition to being, it is also a part that can be visually recognized from the front side of the screen 11. Therefore, the front connecting portion 11c ₁ tends to be a darker portion (dark portion) than the other portions when the screen 11 is viewed from the front side. The dark part due to the front connecting part 11c ₁ tends to appear particularly in the daylighting state.

In this regard, if the vertical width of the front connecting portion 11c ₁ is made too wide, the dark portion due to the front connecting portion 11c ₁ becomes conspicuous, and the appearance of the dimmable roll screen 10 may be deteriorated. Therefore, the vertical width of the front connecting portion 11c ₁ is preferably 5 mm or less. The vertical width of the front connecting portion 11c ₁ is more preferably 4 mm or less, and further preferably 3 mm or less. The lower limit of the vertical width of the front connecting portion 11c ₁ is not particularly limited. However, if the vertical width of the front connecting portion 11c ₁ is too narrow, the connecting strength of the light-shielding film material 11c to the front connecting portion 11c ₁ may decrease. Therefore, the vertical width of the front connecting portion 11c ₁ is usually secured to be about 1 mm. In the dimmable roll screen 10 of the present embodiment, the vertical width of the front connecting portion 11c ₁ is about 2.5 mm.

As described above, in the dimmable roll screen 10 of the present invention, in the light-shielding state, the upper edge (point _R1 ) of the rear connecting portion 11c ₂ in each light-shielding film material 11c is the light-shielding film material 11c. By locating it above the upper edge (point _Q1 ) of the front connecting portion 11c ₁ of the light-shielding film material 11c arranged on the upper side, the indoor side can be made darker. However, for that purpose, it is necessary to extend the rear connecting portion 11c ₂ to a higher position in the rear translucent film material 11b.

Therefore, in the dimmable roll screen 10 of the present invention, the rear connecting portion 11c ₂ extending to a high position as described above may be seen from the front in the daylighting state (particularly the maximum daylighting state). The rear connecting portion 11c ₂ is a portion in which the rear translucent film material 11b and the light-shielding member 11c are polymerized, and has a light-shielding property higher than that of other portions in the rear translucent film material 11b and the light-shielding member 11c. In addition to being a high part, it tends to appear as a dark part (dark part) than other parts. The dark part due to the rear connecting part 11c ₂ tends to appear particularly in the daylighting state. Therefore, if the rear connecting portion 11c ₂ is visible from the front side of the screen 11 in the daylighting state, the dark portion due to the rear connecting portion 11c ₂ becomes conspicuous, and the appearance of the dimming roll screen 10 may be deteriorated.

In order to solve this problem, in the dimming roll screen 10 of the present embodiment, as shown in FIG. 2, the front-rear width W1 of the light _- shielding film material 11c is set to the front-side translucent film material 11a and the rear-side translucency in the daylighting state. The distance from the light film material 11b is set to be larger _than D1. Here, the front-rear width W ₁ of the light-shielding film material 11c is the front-back width (the light-shielding film material 11c) of the portion of the light-shielding film material 11c located between the front-side translucent film material 11a and the rear-side translucent film material 11b. The front-back width when stretched straight in the front-back direction. It means the length of the portion of the light-shielding film material 11c in FIG. 2 located between the points _Q1 and the point _R2 along the curve). is doing. The front-rear width W ₁ is set to be approximately the same as the arrangement pitch of the light-shielding film material 11c in the vertical direction.

In this way, by setting the front-rear width W ₁ of the light-shielding film material 11c to be larger than the distance D ₁ between the front-side translucent film material 11a and the rear-side translucent film material 11b in the light-collecting state, the light-collecting state can be set. As shown in FIG. 2, the light-shielding film material 11c is curved in an "S" shape so that the upper curved portion β ₁ and the lower curved portion β ₂ are formed on the light-shielding film material 11c at that time. At the same time, when the screen 11 in the light-collecting state is viewed from the front, the rear connecting portion 11c ₂ of each light-shielding film material 11c is hidden behind the upper curved portion β ₁ of each light-shielding film material 11c. be able to. The upper curved portion β ₁ is a portion curved so as to be convex upward on the front edge side of the light-shielding film material 11c, and the lower curved portion β ₂ is convex downward on the trailing edge side of the light-shielding film material 11c. It is a curved part so as to become.

As described above, making the front-rear width W ₁ of the light-shielding film material 11c larger than the distance D ₁ between the front-side translucent film material 11a and the rear-side translucent film material 11b in the daylighting state, in other words, the distance. It means that the ratio W ₁ / D ₁ of the front-rear width W ₁ to D ₁ is set to a value larger than 1. The specific value of the ratio W ₁ / D ₁ is not particularly limited, but if the ratio W ₁ / D ₁ is made too small (too close to 1), the light-shielding film material 11c is gently curved in the lighting state. As a result, the upper curved portion β ₁ becomes lower, and the rear connecting portion 11c ₂ may be difficult to hide behind the upper curved portion β ₁ . Therefore, the ratio W ₁ / D ₁ is preferably 1.3 or more. The ratio W ₁ / D ₁ is more preferably 1.5 or more, and further preferably 1.7 or more.

On the other hand, if the ratio W ₁ / D ₁ is made too large, the upper curved portion β ₁ and the lower curved portion β ₂ will protrude greatly in the vertical direction in the lighting state, and the light-shielding film material 11c adjacent to each other in the vertical direction The gap α formed between them may be blocked by the upper curved portion β ₁ and the lower curved portion β ₂ , and the room may not be brightened. Therefore, the ratio W ₁ / D ₁ is preferably 2.5 or less. The ratio W ₁ / D ₁ is more preferably 2.2 or less, and further preferably 2.0 or less. In the dimming roll screen 10 of the present embodiment, the distance D1 between the front translucent film material 11a and the rear translucent film material 11b in the daylighting state is set to _about 40 mm, whereas the light-shielding film is set. Since the front-rear width W ₁ of the material 11c is set to about 70 mm, the value of the ratio W ₁ / D ₁ is about 1.75.

In the dimmable roll screen 10 of the present embodiment, in order to more reliably achieve a desired effect (effect of darkening the indoor side in a light-shielding state, etc.), the front side of each light-shielding film material 11c It is necessary to position the connecting portion 11c ₁ and the rear connecting portion 11c ₂ with high accuracy. It is also necessary to arrange each light-shielding film material 11c in the horizontal direction with high accuracy.

In this respect, in the dimming roll screen 10 of the present embodiment, the screen 11 is formed by a weaving machine, and the front translucent film material 11a, the rear translucent film material 11b, and the light-shielding film material 11c are integrally woven. The front connecting portion 11c ₁ and the rear connecting portion 11c ₂ in each of the light-shielding film materials 11c can be positioned with high accuracy. In addition, the woven screen 11 is placed on a table with tension applied to the screen 11 and the upper and lower edges thereof and the side edges on both sides thereof are cut without switching the orientation of the screen. By doing so, each light-shielding film material 11c is arranged in the horizontal direction with high accuracy. If a large number of intake portions are provided on the upper surface of the table for cutting the screen 11 and the screen 11 is cut while the screen 11 is attached to the upper surface of the table, the screen 11 can be cut with higher accuracy. Can be cut.

The front translucent film material 11a and the rear translucent film material 11b in the screen 11 are not particularly limited as long as they are fabrics having high translucency (fabric having low light-shielding property). However, if a fabric having high translucency is used for the front translucent film material 11a and the rear translucent film material 11b, the room can be made brighter in the daylighting state, and the dimmable roll screen 10 can be used. It is possible to widen the range of dimming. For this reason, the front light-transmitting film material 11a and the rear light-transmitting film material 11b have a light-shielding rate (a light-shielding rate measured in accordance with the A method of JIS-L1055; the same applies hereinafter) of less than 80%. It is preferable to use (a fabric having a light transmittance of 20% or more). The light-shielding ratio of the front-side translucent film material 11a and the rear-side translucent film material 11b is more preferably less than 50% (transparency is 50% or more), and less than 30% (transparency is 70% or more). Is more preferable. The anterior translucent film material 11a and the posterior translucent film material 11b having such high translucency are realized by knitting or weaving light-colored (white or the like) fine threads into a mesh with large eyes. be able to.

On the other hand, the light-shielding film material 11c in the screen 11 is not particularly limited as long as it is a cloth having a high light-shielding property (a cloth having a low light-transmitting property). However, it is possible to make the room darker by using a cloth having a high light-shielding rate for the light-shielding film material 11c, and the significance of adopting the configuration of the present invention increases. Therefore, for the light-shielding film material 11c, it is preferable to use a fabric having a light-shielding rate (a light-shielding rate measured according to the A method of JIS-L1055; the same applies hereinafter) of 90% or more. The light-shielding ratio of the light-shielding film material 11c is more preferably 95% or more, further preferably 99% or more. The light-shielding film material 11c is formed of a fabric having a light-shielding grade of 3 or higher (99.40% or higher in light-shielding rate) according to the Japan Interior Fabrics Association (NIF), and the light-shielding grade is 2 or higher (in light-shielding rate). It can be formed of a cloth having a light blocking effect of 99.80% or more, or a cloth having the same light shielding grade of 1st grade (light blocking rate of 99.99 to 100.00%). The light-shielding film material 11c having such a high light-shielding property can be realized by densely knitting or weaving dark-colored (black or the like) threads.

Here, the light-shielding film material 11c is composed of a weft (weft) arranged in the horizontal direction and a warp (warp) arranged in the vertical direction (vertical direction), and the weft (weft) is formed from the warp (warp). It is preferable to use a thick and stiff thread.

This is because the warp (weft) should be thicker and harder than the warp (warp) (in other words, the warp (warp) should be thinner and softer than the warp (weft)). This makes it easier for the light-shielding film material 11c to bend in the vertical direction, and makes it possible to reduce the diameter (winding diameter) of the screen 11 wound around the winding roller 12. In particular, in the dimmable roll screen 10 of the present invention, as described above, the screen 11 can be wound around the winding roller 12 in the daylighting state (see FIGS. 5 (g) and 5 (h)). At this time, the light-shielding film material 11c is bent a plurality of times to make it difficult to bend. By adopting the above configuration, even when the screen 11 is wound around the winding roller 12 in the daylighting state, the screen 11 It is possible to reduce the winding diameter.

Further, as described above, by using a thick and hard thread as the weft (weft), it becomes easy to form the light-shielding film material 11c straight in the horizontal direction. This is because, as described above, in the dimmable roll screen 10 of the present invention, it is preferable that the screen 11 is knitted or woven, but the screen 11 after knitting or weaving is used. Is usually subjected to a post-process such as heat treatment, so that the shape of the light-shielding film material 11c may be deformed during this post-process. In this regard, by using a thick and stiff thread as the weft (weft), the shape of the weft (weft) is less likely to collapse even in a post-process such as heat treatment, and the light-shielding film material 11c is in a horizontally straight state. This is because it can be easily maintained.

The dimmable roll screen 10 of the present invention is not limited to its installation location, and can be installed in various locations such as homes and business establishments. Above all, it is suitable for installation in a lighting opening (window, etc.) in a hotel guest room. This is because there are various types of hotel guests, such as those who cannot sleep unless the room is darkened, and those who cannot wake up unless the room is brightened in the morning. Therefore, in hotel guest rooms, there is a strong demand to allow guests to adjust the amount of light taken in from the daylighting opening according to their preference. This is because it can meet the demand.

10 Dimmable roll screen 11 Screen 11a Front translucent film material 11b Rear translucent film material 11c Light-shielding film material 11c ₁ Front connection part 11c ₂ Rear connection part 12 Winding roller 13 Operation string (rotation operation means)
14 Friction wheel 15 Bottom rail D ₁ Distance between the front translucent film material and the rear translucent film material in the light-collecting state H ₁ From the upper edge of the front connecting portion of each light-shielding film material in the light-shielding state, respectively. Height to the upper edge of the rear connecting part of the light _- shielding film material arranged on the lower side of one of the light-shielding film materials Front-rear width of the part located in α Gap formed between the light-shielding film materials adjacent to the top and bottom β ₁ Upper curved part β ₂ Lower curved part

Claims (3)

A screen to cover the lighting opening,
It is equipped with a winding roller for winding the screen on the upper side of the lighting opening.
The screen is
The front translucent film material that forms the front surface of the screen,
The rear translucent film material that forms the rear surface of the screen,
It is composed of a plurality of light-shielding film materials arranged substantially in parallel with a predetermined interval in the vertical direction within the gap between the front-side translucent film material and the rear-side translucent film material.
The leading edge portion of each light-shielding film material is a front-side connecting portion polymerized and connected to the front light-transmitting film material, and the trailing edge portion of each light-shielding film material is polymerized and connected to the rear light-transmitting film material. It is said to be the rear connecting part,
By changing the relative position of the anterior translucent film material with respect to the posterior translucent film material,
The leading edge of each light-shielding film descends with respect to the trailing edge, and each light-shielding film material stands up, and the gap between adjacent light-shielding film materials in the vertical direction is minimized. A light-shielding state that minimizes the amount of light taken in from the rear side to the front side,
The leading edge of each light-shielding film rises with respect to the trailing edge, and each light-shielding film is laid down, the gap between adjacent light-shielding film materials in the vertical direction widens, and the rear of the screen. It is a dimmable roll screen that can switch between the lighting state where the amount of light taken in from the side to the front side increases.
In the light-shielding state, the upper edge of the rear connecting portion of each light-shielding film material is located above the upper edge of the front-side connecting portion of the light-shielding film material arranged on the upper side of each light-shielding film material.
The front _- rear width W1 of the portion of the light-shielding film material located between the front-side translucent film material and the rear-side translucent film material is the distance D between the front-side translucent film material and the rear-side translucent film material in the daylighting state. By being set larger than ₁ ,
The light-shielding film material in the daylighting state has an upper curved portion that curves upward on the front edge side of the light-shielding film material and a lower side that curves downward on the trailing edge side of the light-shielding film material. Make sure that the curved part is formed
A dimmable roll characterized in that the rear connecting portion of each light-shielding film material is hidden behind the upper curved portion of each light-shielding film material when the screen in the daylighted state is viewed from the front. screen.
The vertical width of the rear connecting portion of each light-shielding film material is set to 7 mm or more.
In the light-shielding state, the upper edge of the rear connecting portion of each light-shielding film material is located at a position 2 mm or more higher than the upper edge of the front-side connecting portion of the light-shielding film material arranged on the upper side of each light-shielding film material. The dimmable roll screen according to claim 1.
A method for manufacturing a dimmable roll screen according to claim 1 or 2.

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