JP6802010B2 - blind - Google Patents

Description

The present invention relates to blinds.

As a conventional blind, there is one shown in Japanese Patent Application Laid-Open No. 8-355381 (Patent Document 1). The blind disclosed in Patent Document 1 includes a roll that can be driven to rotate, two front and rear screens that are fixed to the roll with the upper ends separated in the roll circumferential direction, and a bottom rail that connects the lower ends of the screens. .. The physical properties of the screen are characterized in that they change alternately in the vertical direction at a cycle equal to or shorter than the distance between the upper ends of the front and rear screens on the roll.

According to this, the weft density of each screen is periodically coarsened to obtain a woven fabric in which the transparency or the ventilation property are alternately changed in the vertical direction, thereby having the following effects. That is, when the front and rear screens are brought into close contact with each other and the transparent portion or the opaque portion is shifted in the vertical direction by the vertical width, the opaque portion of the rear screen overlaps the transparent portion of the front screen, and the transparent portion of the rear screen overlaps the opaque portion of the front screen. Therefore, the blind becomes non-transparent as a whole. Further, when the rolls are rotated so that the upper ends of the front and rear screens are at the same height, the transparent portions and the opaque portions are lined up in the front and rear, so that the blind becomes transparent as a whole.

Japanese Unexamined Patent Publication No. 8-355381

By the way, in the above-mentioned conventional blind, since the upper ends of the two front and rear screens are separated from each other in the roll circumferential direction and fixed, for example, when increasing the daylighting property, the transparent portions of the two front and rear screens are opaque. If the portions are overlapped with each other or the front and rear screens are fixed at positions facing each other by 180 °, the separation distance between the front and rear screens becomes large and more effect can be obtained. However, when the screen is completely lowered to make it non-transparent, and the roll is rotated to shift to a transparent state in which the front and rear screens are separated from each other, the screen is unwound from the peripheral surface of the roll. , There is a problem that the screen is lowered according to the length of the circumference of the roll and the height of the screen is greatly changed. If the height of the screen at the time of dimming is set to the limit of the lower surface of the window frame, the light leaks from below because it is separated from the lower surface of the window frame when fully closed.

Therefore, the present invention has been made in view of such a problem, and the purpose of the present invention is to shift from a state in which all the screens are lowered to be non-transparent, to a state in which the front and rear screens are separated from each other. Sometimes it is to provide a blind that can prevent the height of the screen from changing significantly.

In order to solve the above problems, according to the present invention, a take-up pipe rotatably supported and a first screen and a second screen arranged in a front-rear double manner are provided, and the first screen and the said screen are provided. The upper ends of the second screens are connected by a first connecting portion and a second connecting portion separated in the circumferential direction of the take-up pipe, and the first screen and the second screen are overlapped with each other. In a blind that is wound around a take-up pipe, one peripheral surface connecting the first connecting portion and the second connecting portion of the take-up pipe is centered on the axis of the take-up pipe. A non-circular portion having a different shape from the arc of the portion of the perfect circle connecting the first connecting portion and the second connecting portion is provided, and the length of one of the peripheral surfaces is shorter than the arc. A blind is provided, characterized in that.

According to such a configuration, by providing the non-perfect circular portion on the peripheral surface at the start of winding in the take-up pipe, the screen winding amount with respect to the take-up pipe is smaller than that in the non-perfect circular portion. Therefore, it is possible to reduce the amount of change in the screen height at the time of dimming when the winding pipe is rotated and the front and rear screens are separated from each other when the screen is fully lowered. In this way, it is possible to prevent a large change in the height of the screen when the screen is completely lowered to make it non-transparent to a transparent state in which the front and rear screens have the same height. It is possible.

The present invention has various applications. In the following application examples of the present invention, one or two or more can be appropriately combined.

For example, the first connecting portion and the second connecting portion are provided at positions separated from each other by approximately 180 ° in the circumferential direction on the peripheral surface of the winding pipe, and the winding pipe is provided on one of the peripheral surfaces. A perfect circle portion that is a part of a perfect circle centered on the axis and the non-circular portion are continuously formed, and the other peripheral surface is a positive centered on the axis of the take-up pipe. It may be an arc of a portion of the circle connecting the first connecting portion and the second connecting portion. According to such a configuration, the length of the peripheral surface of the take-up pipe can be shortened by the non-perfect circular portion, and the space inside the take-up pipe can be secured, so that the mechanical parts can be easily installed.

Further, the non-perfect circular portion may be a flat surface. According to such a configuration, the screen winding amount can be reduced in the non-perfect circular portion, and the screen can be stably wound without causing wrinkles or the like.

Further, when one of the first screen or the second screen is lowered to the lowest position on at least one of the first connecting portion and the second connecting portion, the one screen is changed to the other screen. A guide portion for guiding the user may be provided. According to such a configuration, the hanging position of one screen can be brought close to the hanging position of the other screen, so that the shielding property when fully closed can be improved. In addition, since the hanging position of one screen approaches the connecting portion of the other screen, the take-up pipe rotates and the front and rear screens are separated from each other when the screens hang down to the lower limit position while overlapping the front and back. The amount of rotation of the take-up pipe at the time of dimming is reduced, and the amount of change in screen height can be reduced.

Further, the non-perfect circular portion is provided continuously from the first connecting portion or the second connecting portion, and when one of the first screen and the second screen is lowered to the lowest position, the non-perfect circular portion is provided. The non-circular portion may induce the other screen to approach the one screen and hang down. According to this configuration, when one screen is lowered to the lowest position, the other screen hangs in a state of being guided to a non-circular portion, and therefore, as compared with a case of hanging in a state of being guided to a perfect circle. , The other screen can be moved toward the front side to improve the shielding property.

Further, a protruding portion may be provided that protrudes from the non-perfect circular portion in the direction of the first connecting portion or the second connecting portion. As described above, by providing the non-perfect circular portion on one of the peripheral surfaces, the screen winding amount with respect to the take-up pipe becomes small, but by providing the protruding portion, that amount can be offset by the length of the protruding portion. , It is possible to prevent a decrease in the winding amount of the screen.

Further, the protruding portion may lock the end portion of the first screen or the second screen. Such a configuration simplifies the structure because it is not necessary to provide a special configuration for locking the edges of the first screen or the second screen. In particular, if the end portion of the first screen or the second screen is locked by the projecting portion and the guide portion, the end portion of the first screen or the second screen can be locked most effectively.

According to the blind of the present invention, it is possible to prevent a large change in the height of the screen when the screen is completely lowered to be non-transparent and the front and rear screens are separated from each other to be transparent. Can be done. Other effects of the present invention will also be described in the embodiments for carrying out the invention described later.

It is a perspective view which shows the whole structure of a blind. It is a figure which shows the difference of the structure of the winding pipe 110 of this embodiment and the conventional winding pipe, (a) shows the winding pipe 110 of this embodiment, (b) is the conventional winding pipe. Shown. It is a figure for demonstrating the structure of the connection part of the screen 120 and the take-up pipe 110. It is a figure which shows the difference in each state of the blind 100 of this embodiment and the conventional blind, (a)-(d) shows the blind 100 of this embodiment, and (e)-(h) are the conventional blinds. Is shown. It is a figure which shows the operation of the blind 100. It is a figure which shows the operation of the blind 200 of the 2nd Embodiment. It is a figure for demonstrating the take-up pipe 310 of the 3rd Embodiment. It is a figure for demonstrating the take-up pipe 410 of the 4th Embodiment.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

(First Embodiment)
The configuration of the blind 100 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of the blind 100 according to the present embodiment. FIG. 2 is a side view of the take-up pipe 110.

As shown in FIG. 1, the blind 100 according to the present embodiment winds the upper ends of the front screen (first screen) 120a and the rear screen (second screen) 120b arranged in the front and rear double directions. By connecting the take-up pipe 110 with two connecting portions separated in the circumferential direction, the front screen 120a and the rear screen 120b are wound around the take-up pipe 110 in an overlapping state.

First, the overall configuration of the blind 100 of the present embodiment will be described with reference to FIG. As shown in FIG. 1, the blind 100 is attached to the window frame, the ceiling, or the like by attaching the set frame 140, which is fixed to the window frame, the ceiling, or the like (not shown) via the bracket 130. Side brackets 150 are provided at both ends of the set frame 140. Both ends of the take-up pipe 110 are rotatably supported on the side bracket 150. The screen 120 is folded back by the weight bar 160 and arranged so as to overlap the front and back, and both ends of the screen 120 (the upper ends of the front screen 120a and the rear screen 120b) are wound and unwound on the take-up pipe 110. It is connected as possible.

An operation chain 180 is provided at one end of the side bracket 150. By operating the operation chain 180 and operating the rotation of the take-up pipe 110, the raising and lowering and dimming of the screen 120 are operated. When the operation of the operation chain 180 is stopped, the take-up pipe 110 can maintain its stop position by a known stopper.

Next, the take-up pipe 110 and the screen 120, which are the components characteristic of the present embodiment, will be described in detail. First, the take-up pipe 110 will be described with reference to FIG. In the following, it will be described in comparison with a conventional take-up pipe (also called a roll).

(Taking pipe 110)
The take-up pipe 110 winds and unwinds the screen 120 by rotating to raise and lower the screen 120. As shown in FIG. 2A, the take-up pipe 110 has a first connecting portion 112 to which the front screen 120a is connected at positions separated by approximately 180 degrees in the circumferential direction, and a rear screen 120b. A second connecting portion 114 to which is connected is formed.

As shown in FIG. 2B, the conventional take-up pipe 510 also has a first connecting portion 512 and a rear side in which the front screen is connected at positions separated by 180 degrees in the circumferential direction of the take-up pipe 510. A second connecting portion 514 to which the screen is connected is formed. In the conventional take-up pipe 510, the two peripheral surfaces connecting the first connecting portion 512 and the second connecting portion 514 are both formed in a perfect circle. Therefore, the lengths of the two peripheral surfaces are the same.

On the other hand, the take-up pipe 110 according to the present embodiment has a first peripheral surface (which is the start of winding of the screen 120b on the rear side) of the two peripheral surfaces connecting the first connecting portion 112 and the second connecting portion 114. One peripheral surface) 116 is formed by continuously forming a perfect circular portion 116a and a flat surface 116b. The perfect circle portion 116a is formed from the second connecting portion 114 to the intermediate position toward the first connecting portion 112, and the flat surface 116b is formed from the perfect circle portion 116a to the first connecting portion 112. The perfect circle portion 116a is an arc forming a part of a perfect circle centered on the axis C of the take-up pipe 110. The flat surface 116b is an example of a non-perfect circular portion. The flat surface 116b is a plane having a shape different from that of an arc forming a part of a perfect circle centered on the axis C of the take-up pipe 110, and the length of the peripheral surface is shorter than the arc. Further, the second peripheral surface (the other peripheral surface) 118 of the take-up pipe 110 is a perfect circle. Therefore, the length of the first peripheral surface 116 is shorter than the length of the second peripheral surface 118.

A protruding portion 116c projects from the flat surface 116b of the first peripheral surface 116 in the direction of the first connecting portion 112. As will be described later, the protrusion 116c extends to the vicinity of the tip of the guide portion 112d that guides the front screen 120a toward the rear screen 120b. The protruding portion 116c is formed to supplement the reduction in the winding amount of the front screen 120a due to the shortening of the peripheral surface length due to the flat surface 116b. Further, since the protruding portion 116c extends to the tip of the guide portion 112d, it is possible to prevent the screen 120 wound around the winding pipe 110 from falling into the recess 112a of the first connecting portion 112 and being dented. .. The function of the protruding portion 116c will be further described later.

The first connecting portion 112 is a portion to which the upper end of the front screen 120a is connected, and the second connecting portion 114 is a portion to which the upper end of the rear screen 120b is connected. As shown in FIG. 2A, the first connecting portion 112 has a recess 112a into which the upper end of the front screen 120a is inserted, and a recess 112a from the first peripheral surface 116 and the second peripheral surface 118. The extension portions 112b and 112c, which are extended to the above, are provided. The extension portions 112b and 112c prevent the upper end of the front screen 120a from falling off from the recess 112a. The mechanism for preventing the screen 120 from falling off will be further described later.

Further, the first connecting portion 112 is provided with a guide portion 112d that guides the front screen 120a toward the rear screen 120b when the front screen 120a is lowered to the lowest position. As shown in FIG. 2A, the guide portion 112d is formed in an arc shape from the second peripheral surface 118 to the vicinity of the tip portion of the protruding portion 116c. The tip of the guide portion 112d is at an angle y from the vertical direction when the screen 120 is fully closed. The angle y is smaller than the angle x formed by the end of the second connecting portion 414 from the vertical direction when the screen of the conventional take-up pipe 410 shown in FIG. 2B is fully closed.

As shown in FIG. 2A, the second connecting portion 114 has a recess 114a into which the upper end of the rear screen 120b is inserted, and a recess 114a from the first peripheral surface 116 and the second peripheral surface 118. It is provided with extension portions 114b and 114c extending upward. The extensions 114b and 114c prevent the upper end of the rear screen 120b from falling out of the recess 114a.

The take-up pipe 110 has been described above. Next, the screen 120 will be described with reference to FIGS. 1 and 3.

(Screen 120)
The screen 120 opens, closes, and dims the opening. As shown in FIG. 1, the screen 120 includes a front screen 120a located on the front side and a rear screen 120b located on the rear side so as to be folded back by the weight bar 160 and overlapped in the front-rear direction.

The screen 120 is wound and unwound on the take-up pipe 110 in a state where the front screen 120a and the rear screen 120b are overlapped with each other. In the screen 120, transparent portions 122 and opaque portions 124 are formed alternately and continuously in the vertical direction.

When the transmission portions 122 of the front screen 120a and the rear screen 120b face each other and overlap with each other, the screen 120 can take in light from the outside. Hereinafter, this state is referred to as a "dimming state". By changing the width in which the facing transmitting portions 122 overlap each other, the amount of light taken in can be changed. Further, since the opaque portion 124 can completely cover the transmissive portion 122, when the transmissive portion 122 and the opaque portion 124 of the front screen 120a and the rear screen 120b overlap each other in the front-rear direction, light from the outside is emitted. It can be blocked. Hereinafter, this state is referred to as a "fully closed state".

Next, the configuration of the connecting portion between the screen 120 and the take-up pipe 110 will be described with reference to FIG. FIG. 3 is a diagram for explaining the configuration of the connecting portion between the screen 120 and the take-up pipe 110. As shown in FIG. 3, connecting plates 170 and 172 are provided at the upper ends of the front screen 120a and the rear screen 120b, respectively. The connecting plate 170 of the front screen 120a is inserted into the recess 112a of the first connecting portion 112, is prevented from coming off by the extension portions 112b and 112c, and the upper end of the front screen 120a is connected to the first connecting portion 112. Further, the connecting plate 172 of the rear screen 120b is inserted into the recess 114a of the second connecting portion 114 and is prevented from coming off by the extending portions 114b and 114c, and the upper end of the rear screen 120b is connected to the second connecting portion 114. Will be done.

The configuration of the blind 100 has been described above. Next, the states of the take-up pipe 110 and the screen 120 when the blind 100 is in the fully closed state, the most lowered state, and the dimming state will be described with reference to FIG. 4 (a) to 4 (d) show the state of the blind 100 according to the present embodiment, and FIGS. 4 (e) to 4 (h) show the state of the conventional blind 400. It is assumed that the take-up pipe 410 of the conventional blind 400 is composed of a perfect circle.

(1) Shielding property In the screen 120 of the blind 100 according to the present embodiment, as shown in FIG. 4A, the front screen 120a and the rear screen 120b overlap each other in the fully closed state. ing. The front screen 120a is guided toward the rear screen 120b by the guide portion 112d, and the rear screen 120 is guided by the flat surface 116b and the protrusion 116c and hangs toward the front screen 120a. In this way, the front screen 120a and the rear screen 120b are guided in a direction approaching each other. Therefore, since the gap between the front screen 120a and the rear screen 120b becomes small, the opaque portion 124 can completely cover the transmissive portion 122 even when the screen 120 is viewed from diagonally above, so that the shielding property is improved. To do.

On the other hand, in the screen 520 of the conventional blind 500, as shown in FIG. 4 (e), since the take-up pipe 510 is a perfect circle, the front screen 520a and the rear screen 520b are guided in a direction approaching each other. Instead, it hangs down from the tangent of the circle.

(2) Height of front and rear screens When the screen 120 of the blind 100 according to the present embodiment is in the most lowered state, as shown in FIG. 4B, the take-up pipe 110 has a first connecting portion 112. The second connecting portion 114 is at the most lowered position. At this time, the position of the lower end of the screen 120, that is, the position of the weight bar 160, is lower than that in the fully closed state because the front and rear screens 120 are unwound from the take-up pipe 110 from the state (a). .. When the screen 120 is in the most lowered state, the front screen 120a and the rear screen 120b are separated from each other. Since the length of the peripheral surface 116 of the first peripheral surface 116 of the take-up pipe 110 is shorter than that of the perfect circle, the length of unwinding the rear screen 120b is shorter than that of unwinding from the peripheral surface of the perfect circle. Therefore, the displacement amount H1 of the height of the lower end of the screen 120 between the fully closed state and the most lowered state becomes smaller. Therefore, in the fully closed state, the length of the screen 120 becomes long, so that light leakage from below the weight bar 160 is prevented.

On the other hand, the screen 520 of the conventional blind 500 is rearward because the take-up pipe 510 is a perfect circle as shown in FIG. 4 (f) when descending from the fully closed state to the most lowered state. The length at which the screen 520b is unwound is longer than that of the blind 100 of the present embodiment. Therefore, the displacement amount H2 at the height of the lower end of the screen 120 between the fully closed state and the most lowered state is larger than the displacement amount H1 of the present embodiment. Therefore, in the fully closed state, the length of the screen 520 is shortened, so that light leaks from below the weight bar 560.

(3) Spacing between front and rear screens Further, in the dimmed state of the blind 100 according to the present embodiment, as shown in FIG. 4C, the take-up pipe 110 is connected to the first connecting portion 112 and the second connecting portion 112. Rotate so that the positions of the portions 114 are the same. The position of the lower end of the screen 120 at this time, that is, the position of the weight bar 160 is the same as the state in which the screen 120 is most lowered. In the dimmed state, the front screen 120a and the rear screen 120b are further separated from each other than when the screen 120 is in the most lowered state.

On the other hand, in the conventional blind 500 as shown in FIG. 4 (g), the take-up pipe 510 has the same positions of the first connecting portion 512 and the second connecting portion 514 as in the present embodiment. Rotate. The position of the lower end of the screen 520 at this time, that is, the position of the weight bar 560 is the same as the state in which the screen 520 is most lowered. In the dimmed state, as shown in FIG. 4 (g), the front screen 520a and the rear screen 520b are further separated from each other than when the screen 520 is in the most lowered state, but the take-up pipe 510 is positive. Since it is a circle, the distance between the two is narrower than that in the present embodiment.

(4) About dimming of the screen Further, in the dimming state of the blind 100 according to the present embodiment, as shown in FIG. 4 (d), the take-up pipe 110 is further rotated to make the first connecting portion 112. The position where the second connecting portion 114 is most lowered is set at the highest position. At this time, the front screen 120a is wound along the flat surface 116b of the winding pipe 110, but the length wound on the flat surface 116 is shorter than that wound from the peripheral surface of a perfect circle. However, since the protruding portion 116c is formed, the length of the protruding portion 116c cancels out the difference between the flat surface 116 and the peripheral surface length of the perfect circle, and the weight bar is formed from the state shown in FIG. 4 (c). It is prevented from descending.

On the other hand, in the conventional blind 500, as shown in FIG. 4H, the take-up pipe 510 is further rotated to the second position where the first connecting portion 512 is raised most, as in the present embodiment. The connecting portion 514 is set to the lowest position. At this time, the front screen 520a is wound from the peripheral surface of the perfect circle of the winding pipe 510, but since the amount of the rear screen 520b is the same as the amount of unwinding, the position of the lower end of the screen 520, that is, The position of the weight bar 560 is the same as when the screen 520 is most lowered.

The state of the blind 100 of the present embodiment has been described above. Next, the operation of the blind 100 of the present embodiment will be described with reference to FIG. FIG. 5 is a diagram for explaining the operation of the blind 100.

In the blind 100 of the present embodiment, when the screen 120 is in the fully open state, as shown in FIG. 5A, the screen 120 is connected to the take-up pipe 110 in a state where the front screen 120a and the rear screen 120b are overlapped with each other. Completely wound up.

The operation chain 180 (FIG. 1) is operated to rotate the take-up pipe 110 in the direction of unwinding the screen 120. Therefore, as shown in FIGS. 5B and 5C, the front screen 120a and the rear screen 120b are unwound from the take-up pipe 110 in a state of being overlapped with each other.

When the operation chain 180 is operated to further rotate the take-up pipe 110 in the direction of unwinding the screen 120, the screen 120 is unwound from the take-up pipe 110 until the screen 120 is fully closed, as shown in FIG. 5 (d). I will go. In the fully closed state, the front screen 120a and the rear screen 120b continue to overlap each other.

When the operation chain 180 is operated from the fully closed state to further rotate the take-up pipe 110 in the direction of unwinding the screen 120, the first connecting portion 112 rises and moves to the frontmost side as shown in FIG. 5 (e). It moves, and as the second connecting portion 114 descends, it moves to the rearmost side. Therefore, the upper end of the front screen 120a moves forward, the rear screen 120b is unwound from the first peripheral surface 116 of the take-up pipe 110 and moves backward, and the screen 120 becomes V-shaped. .. At this time, the lower end of the screen 120 is slightly lowered, and a part of the transmissive portions 122 of the front screen 120a and the rear screen 120b face each other and weigh each other, resulting in a dimming state.

When the operation chain 180 is operated from the state of FIG. 5 (e) to further rotate the take-up pipe 110 in the direction of unwinding the screen 120, the first connecting portion 112 rises most as shown in FIG. 5 (f). The second connecting portion 114 moves to the position where it is most lowered. Therefore, the upper end of the front screen 120a is pulled up, the rear screen 120b moves forward with the rotation of the take-up pipe 110, and the transparent portions 122 of the front screen 120a and the rear screen 120b are completely separated from each other. It will be in a dimming state where the most lighting effect can be expected.

(Effect of the first embodiment)
As described above, according to the present embodiment, by providing the flat surface (non-round portion) 116b on the peripheral surface of the take-up pipe 110 at the start of winding, the flat surface 116 is more than a perfect circle. The screen winding amount with respect to the winding pipe 110 is reduced. Therefore, it is possible to reduce the amount of change in the screen height during dimming when the take-up pipe 110 rotates and the front and rear screens 120 are separated from each other when the screens 120 are all lowered and fully closed. In this way, when the screen 120 is completely lowered to make it non-transparent, the height of the screen 120 changes significantly when the front and rear screens are changed to the transparent state having the same height. It is possible to prevent it.

Further, the first connecting portion 112 and the second connecting portion 114 are provided at positions separated by approximately 180 ° in the circumferential direction on the peripheral surface of the winding pipe 110, and the shaft of the winding pipe 110 is provided on one peripheral surface 116. A perfect circle portion 116a, which is a part of a perfect circle centered on the center C, and a flat surface 116b, which is different in shape from the perfect circle portion and whose peripheral surface length is shorter than that of the perfect circle portion 116a, are continuously formed. The other peripheral surface 118 is a flat surface because it is an arc of a portion of a perfect circle centered on the axis C of the take-up pipe 110 that connects the first connecting portion 112 and the second connecting portion 114. While the length of the peripheral surface of the take-up pipe 110 is shortened by the 116b, the space inside the take-up pipe 110 can be secured by the perfect circle portion 116a and the other peripheral surface 118, so that the mechanical parts can be easily installed.

Further, by using the flat surface 116b as an example of the non-perfect circular portion, the screen winding amount can be reduced on the flat surface 116b, and the screen 120 can be stably wound without causing wrinkles or the like.

Further, the first connecting portion 112 is provided with a guide portion 112d that guides the front screen 120a toward the rear screen 120b when the screen 120 is lowered to the lowest position. Since the hanging position of the front screen 120a can be brought closer to the hanging position of the rear screen 120b, the shielding property when fully closed can be improved. Further, since the hanging position of the front screen 120a approaches the second connecting portion 114 of the rear screen 120b, the front screen 120a and the rear screen 120b are fully closed to the lower limit position while overlapping in the front-rear direction. From time to time, the amount of rotation of the take-up pipe 110 at the time of dimming when the front screen 120a and the rear screen 120b are separated from each other by rotation of the take-up pipe 110 becomes small, and the amount of change in the height of the screen 120 becomes small. it can.

Further, the flat surface (non-round portion) 116b is continuously provided from the first connecting portion 112, and when the screen 120 is lowered to the lowest position, the flat surface 116b causes the rear screen 120b to be on the front side. By guiding the screen 120a to hang down, when the front screen 120a is lowered to the lowest position, the rear screen 120b hangs down while being guided by the flat surface 116b. For this reason, the screen 120b on the rear side can be moved closer to the front side to improve the shielding property, as compared with the case where the screen 120b hangs down while being guided to the perfect circle portion.

(Second Embodiment)
The configuration of the blind 200 according to the second embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view of the blind 200 of the second embodiment as viewed from the side. In the present embodiment, instead of the screen 120 of the first embodiment, as shown in FIG. 6, a screen 220 having a plurality of louver portions 220c formed in the vertical direction between the front and rear screens 220a and 220b is used, and a weight bar is used. The shape of 260 is different from that of the first embodiment in that the weight bar 160 is changed from that of the first embodiment, and other points are the same as those of the first embodiment. In this embodiment, the differences from the first embodiment will be mainly described. The components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

The take-up pipe 210, the first connecting portion 212, and the second connecting portion 214 of the present embodiment are substantially the same as the take-up pipe 110, the first connecting portion 112, and the second connecting portion 114 of the first embodiment. Is.

As shown in FIG. 6, the screen 220 is composed of a front screen 220a, a rear screen 220b, and a plurality of louver portions 220c connecting the front screen 220a and the rear screen 220b. The upper ends of the front screen 220a and the rear screen 220b are connected to the first connecting portion 212 and the second connecting portion 214 of the take-up pipe 210, as in the first embodiment. The weight bar 260 of the present embodiment does not have a configuration in which the screen 120 is folded back like the weight bar 160 of the first embodiment, but is provided between the front screen 220a and the rear screen 220b. It is provided so as to connect the lower ends of the screen.

The configuration of the blind 200 of the present embodiment has been described above. Next, the operation of the blind 200 of the present embodiment will be described with reference to FIG.

In the blind 200 of the present embodiment, when the screen 220 is in the fully open state, as shown in FIG. 6A, the screen 220 is wound with the front screen 220a, the rear screen 220b, and the louver portion 220c overlapping. It is completely wound up on the take-up pipe 210.

When the take-up pipe 210 is rotated in the direction of unwinding the screen 220, as shown in FIGS. 6B and 6C, the front screen 220a, the rear screen 220b, and the louver portion 220c overlap each other. It is unwound from the take-up pipe 210.

When the take-up pipe 210 is further rotated in the direction of unwinding the screen 220, as shown in FIG. 6D, the take-up pipe 210 is unwound from the take-up pipe 210 until the front screen 220a reaches the lower limit position. In this state, the front screen 220a and the rear screen 220b are still in an overlapping state, and the louver portion 220c is held substantially vertically, so that the screen is fully closed.

When the take-up pipe 210 is further rotated in the direction of unwinding the screen 220 from the fully closed state, the first connecting portion 212 moves to the frontmost side and the second connecting portion 214 is the most as shown in FIG. 6 (e). Move to the back side. Therefore, as the upper end of the front screen 220a rises, it moves forward, and as the rear screen 220b descends, it is unwound from the first peripheral surface 216 of the take-up pipe 210 and moves backward, and the louver portion 220c Rotates to almost horizontal and becomes dimmed.

(Effect of the second embodiment)
As described above, according to the present embodiment, the screen 220 in which a plurality of louver portions 220c are formed in the vertical direction between the front and rear screens 220a and 220b has substantially the same effect as that of the first embodiment. Is obtained.

(Third Embodiment)
The configuration of the blind take-up pipe 310 according to the third embodiment will be described with reference to FIG. 7. FIG. 7 is a diagram for explaining the take-up pipe 310 of the present embodiment.

The take-up pipe 310 of the present embodiment is different from the first embodiment in that the shape of the first peripheral surface 116 of the take-up pipe 110 of the first embodiment is changed, and the other points are the first. It is the same as the embodiment of. In this embodiment, the differences from the first embodiment will be mainly described. The components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

The blind take-up pipe 310 according to the present embodiment is the entire first peripheral surface 316 which is the start of winding of the screen on the rear side of the two peripheral surfaces connecting the first connecting portion 312 and the second connecting portion 314. However, it is composed of a flat surface 316b which is a non-perfect circular portion. That is, the first peripheral surface 316 is not provided with the one corresponding to the perfect circle portion 116a as in the first embodiment. Therefore, the screen hanging from the flat surface 316b hangs in a state of being further forward than the screen 120 of the first embodiment as a whole. Therefore, even if the rear screen is not moved toward the front screen, the flat surface 316b allows the rear screen to be naturally arranged closer to the front screen. The second peripheral surface 318 of the take-up pipe 310 is a perfect circle as in the first embodiment.

Further, since the entire first peripheral surface 316 is a flat surface 316b, the length of the first peripheral surface 316 is further shorter than the length of the first peripheral surface 116 of the first embodiment. Therefore, the amount of change in the screen height at the time of dimming when the take-up pipe 310 rotates and the front and rear screens are separated from each other when the screens are fully lowered can be further reduced as compared with the first embodiment.

The first connecting portion 312 is provided with a guide portion 312d having the same function as that of the first embodiment and having substantially the same shape. The guide portion 312d extends to the end of the second peripheral surface 318 on the second connecting portion 314 side. The tip of the guide portion 312d is at an angle z from the vertical direction when the screen is fully closed. The angle z is even smaller than the angle y of the first embodiment. As described above, since the angle z at which the tip of the guide portion 312d is located is smaller than the angle y at which the tip of the guide portion 112d of the first embodiment is located, the screen in the fully closed state is further smaller than that of the first embodiment. It will hang down while leaning forward.

(Effect of Third Embodiment)
As described above, according to the present embodiment, the entire first peripheral surface 316 of the take-up pipe 310 is a flat surface 316b which is a non-perfect circular portion, so that the space inside the take-up pipe 310 is slightly small. However, the rear screen will naturally be placed closer to the front screen.

Further, since the entire first peripheral surface 316 is a flat surface 316b, the length of the first peripheral surface 316 is further shorter than the length of the first peripheral surface 116 of the first embodiment. Therefore, the amount of change in the screen height at the time of dimming when the take-up pipe 310 rotates and the front and rear screens are separated from each other when all the screens are fully closed can be further reduced as compared with the first embodiment. Therefore, when the screen is completely lowered to make it non-transparent, the rotation amount of the take-up pipe 310 can be reduced when the front and rear screens are separated from each other to make the screen transparent, and the height of the screen can be reduced. Can be further prevented as compared with the first embodiment.

(Fourth Embodiment)
The configuration of the blind take-up pipe 410 according to the fourth embodiment will be described with reference to FIG. FIG. 8 is a diagram for explaining the take-up pipe 410 of the present embodiment.

In the take-up pipe 410 of the present embodiment, the point that the shapes of the first connecting portion 112 and the protruding portion 116c of the take-up pipe 110 (FIG. 2) of the first embodiment are changed is different from that of the first embodiment. The differences are the same as in the first embodiment. In this embodiment, the differences from the first embodiment will be mainly described. The components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

The first peripheral surface 416, the flat surface 416b, the second peripheral surface 418, the second connecting portion 414, and the connecting plates 470 and 472 of the present embodiment are the first peripheral surface 116 and the flat surface of the first embodiment. It is substantially the same as 116b, the second peripheral surface 118, the second connecting portion 114, and the connecting plates 170 and 172.

The present embodiment is characterized in that the connecting plate 470 provided at the end of the first screen 120a is prevented from falling off by the first connecting portion 412 and the protruding portion 416c.

First, the first connecting portion 412 will be described. As shown in FIG. 8, in the blind take-up pipe 410 according to the present embodiment, the first connecting portion 412 is composed of the recess 412a and the guide portion 412d, and the connecting plate 170 of the first embodiment falls off. Nothing corresponding to the extension portions 112b and 112c (FIG. 2) is provided to prevent the above. In the present embodiment, the guide portion 412d has a shape extending from one end of the recess 412a onto the recess 412a. The connecting plate 470 inserted into the recess 412a is prevented from falling off from the first connecting portion 412 by sandwiching one end of the connecting plate 470 between the end of the recess 412a and the guide portion 412d.

Next, the protrusion 416c will be described. The protrusion 416c protrudes from the flat surface 416b in the same manner as the protrusion 116c (FIG. 2) of the first embodiment. The protrusion 416c forms a locking portion 416d that is bent in the direction of the recess 412a, whereas the tip of the protrusion 116c of the first embodiment is linear. The other end of the connecting plate 470 inserted into the recess 412a is locked to the locking portion 416d to prevent it from falling off from the first connecting portion 412.

(Effect of Fourth Embodiment)
As described above, according to the present embodiment, the guide portion 412d also serves as the extension portion 112b of the first embodiment, and the protruding portion 416c also serves as the function of the extension portion 112c of the first embodiment. It is not necessary to provide the extension portions 112b and 112c of the first embodiment. Therefore, in addition to the effect of the first embodiment, the structure of the first connecting portion 412 is simplified, which facilitates manufacturing.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

For example, in the above embodiment, the case where the distance between the first connecting portion and the second connecting portion is set to about 180 ° has been described, but the present invention is not limited to this, and any angle can be used. In particular, by setting the distance between the first connecting portion and the second connecting portion to be smaller than approximately 180 °, the peripheral surface (first peripheral surface) between the first connecting portion and the second connecting portion can be set. The length can be shortened.

Further, although the flat surface has been described as an example of the non-perfect circular portion, the present invention is not limited to this. Any shape may be used as long as it can connect two points (between the first connecting portion and the second connecting portion) with a shape shorter than the arc centered on the axis of the take-up pipe. For example, a non-perfect circle. As another example of the portion, a curved surface having a small curvature (the radius of curvature is larger than the radius of a perfect circle centered on the axis of the take-up pipe) can be used. A flat surface can also be interpreted as a curved surface with zero curvature (infinite radius of curvature).

Further, in the first embodiment, the case where the guide portion 112d is provided in the first connecting portion 112 has been described, but the present invention is not limited to this, and at least of the first connecting portion 112 and the second connecting portion 114. A guide portion may be provided on one side. Further, the configuration of the guide portion is not limited to the configuration described in the above embodiment, and when one screen of the first screen or the second screen is lowered to the lowest position, one screen is directed toward the other screen. Any configuration that can be induced can be adopted.

Further, in the first embodiment, the flat surface 116b is continuously provided on the first connecting portion 112, and the perfect circular portion 116a is continuously provided on the second connecting portion 114. The flat surface 116b may be continuously provided on the second connecting portion 114, and the perfect circular portion 116a may be continuously provided on the first connecting portion 112. Further, a plurality of flat surfaces and perfect circles may be provided.

Further, in the fourth embodiment, the guide portion 412d and the protruding portion 416c are configured to lock the connecting plate 470 provided at the upper end of the first screen, but the present invention is not limited to this. Any configuration can be adopted in which the protrusion locks the edge of the first screen or the second screen. For example, the connecting plate 470 may be locked by the extension portion 112b and the protrusion portion 416c of the first embodiment instead of the guide portion 412d.

Further, it is possible to arbitrarily combine a part or all of the features of any of the above embodiments with a part or all of the features of any other embodiment. For example, the ladder-shaped blind of the second embodiment may be combined with the configuration of the take-up pipe of the third embodiment. Other combinations can be understood by those skilled in the art.

100, 200, 500 Blinds 110, 210, 310, 410, 510 Winding pipes 112, 212, 412, 512 First connecting part 112a, 412a Recessed parts 112b, 112c Extension part 112d, 412d Guide parts 114, 214, 414, 514 Second connecting portion 114a, 414a Recessed portion 114b, 114c Extension portion 116, 316, 416 First peripheral surface (one peripheral surface)
116a Round part 116b, 316b, 416b Flat surface (non-round part)
116c, 416c Protruding part 118 Second peripheral surface (the other peripheral surface)
120, 220, 520 screens 120a, 220a, 520a Front screens 120b, 220b, 520b Rear screens 220c Connecting part 122 Transparent part 124 Non-transparent part 130 Bracket 140 Set frame 150 Side bracket 160, 260 Weight bars 170, 172, 270, 272, 470, 472 Connecting plate 180 Operation chain 416d Locking part

Claims (6)

A take-up pipe that is rotatably supported and a first screen and a second screen that are arranged in a front-rear manner are provided, and the upper ends of the first screen and the second screen are formed on the take-up pipe. In a blind that is connected by a first connecting portion and a second connecting portion that are separated in the circumferential direction and is wound around the winding pipe in a state where the first screen and the second screen are overlapped with each other.
On one peripheral surface connecting the first connecting portion and the second connecting portion of the winding pipe, the first connecting portion and the second connecting portion of a perfect circle centered on the axis of the winding pipe the arcuate portion connecting the connecting portion is provided with different non-circle section shape, the length of the one circumferential surface rather short than the circular arc,
The first connecting portion and the second connecting portion are provided at positions separated by approximately 180 ° in the circumferential direction on the peripheral surface of the take-up pipe.
On one of the peripheral surfaces, a perfect circle portion that is a part of a perfect circle centered on the axis of the take-up pipe and the non-perfect circle portion are continuously formed, and the other peripheral surface is A blind, which is an arc of a portion of a perfect circle centered on the axis of the take-up pipe that connects the first connecting portion and the second connecting portion . A take-up pipe that is rotatably supported and a first screen and a second screen that are arranged in a front-rear manner are provided, and the upper ends of the first screen and the second screen are formed on the take-up pipe. In a blind that is connected by a first connecting portion and a second connecting portion that are separated in the circumferential direction and is wound around the winding pipe in a state where the first screen and the second screen are overlapped with each other.
On one peripheral surface connecting the first connecting portion and the second connecting portion of the winding pipe, the first connecting portion and the second connecting portion of a perfect circle centered on the axis of the winding pipe A non-circular portion having a shape different from that of the arc of the portion connecting the connecting portion is provided, and the length of one of the peripheral surfaces is shorter than that of the arc.
The non-circle section, characterized in that it is a flat surface, a blind. A take-up pipe that is rotatably supported and a first screen and a second screen that are arranged in a front-rear manner are provided, and the upper ends of the first screen and the second screen are formed on the take-up pipe. In a blind that is connected by a first connecting portion and a second connecting portion that are separated in the circumferential direction and is wound around the winding pipe in a state where the first screen and the second screen are overlapped with each other.
On one peripheral surface connecting the first connecting portion and the second connecting portion of the winding pipe, the first connecting portion and the second connecting portion of a perfect circle centered on the axis of the winding pipe A non-circular portion having a shape different from that of the arc of the portion connecting the connecting portion is provided, and the length of one of the peripheral surfaces is shorter than that of the arc.
At least one of the first connecting portion and the second connecting portion
Wherein when the first screen or one of the screen of the second screen is lowered to the lowest position, wherein the guide portion for guiding the one screen toward the other of the screen is provided, blanking Lined. The non-perfect circular portion is provided continuously from the first connecting portion or the second connecting portion.
When one of the first screen and the second screen is lowered to the lowest position, the non-perfect circle guides the other screen to hang down toward the one screen. The blind according to any one of claims 1 to 3 . The blind according to claim 4 , wherein a projecting portion projecting from the non-perfect circular portion toward the first connecting portion or the second connecting portion is provided. The blind according to claim 5 , wherein the protruding portion locks the end portion of the first screen or the second screen.