JP7490856B2 - BLIND - Google Patents

Description

The present invention relates to blinds.

Conventionally, there are blinds called pleated screens, which allow the amount of light entering the room to be adjusted by raising and lowering the accordion-like foldable screen.

The following Patent Document 1 discloses a pleated screen in which an intermediate rail is suspended from a head box via a first lifting cord, a bottom rail is suspended via a second lifting cord, an upper screen is supported between the head box and the intermediate rail, and a lower screen is supported between the intermediate rail and the bottom rail, and the lower end of the first lifting cord is attached to the intermediate rail at a position near the center axis passing through the center of gravity determined by the shape of the intermediate rail.

The above-mentioned Patent Document 1 also discloses that the upper screen has a fabric with a crease in the vertical middle, and that joint pieces are provided at both the upper and lower edges of the fabric, and that each joint piece of the upper screen has an insertion hole formed of a round hole or a long hole, and that a first lifting cord and a second lifting cord hanging down from the head box are inserted into the insertion holes.

JP 2015-218429 A

However, in the technology described in Patent Document 1, the insertion holes formed in the pleated screen are not exposed from the front of the screen, which improves the design and prevents light leakage. However, because the lifting cord hangs down from a position biased toward the rear of the screen, in order to keep the intermediate rail horizontal in its short direction, it was necessary to adjust the attachment position so that the lower end of the lifting cord is attached to the intermediate rail at a position near the center axis of gravity of the intermediate rail.

In view of the above circumstances, the object of the present invention is to provide a blind that improves design and prevents light leakage while allowing the bar at the bottom edge of the screen to be easily kept horizontal in the short direction.

In order to achieve the above object, a blind according to one embodiment of the present invention includes a head box, a first winding drum, a second winding drum, a first screen, and a second screen. The head box can be installed on a predetermined surface, and the first winding drum and the second winding drum are arranged in parallel inside the head box. The first screen has a plurality of pleats, and is supported so as to be able to rise and fall by inserting a light control cord having one end connected to the first winding drum and the other end connected to an intermediate bar. The second screen is a foldable screen, and is connected to the first screen by inserting a lifting cord having one end connected to the second winding drum and the other end connected to a bottom rail through the first screen and the intermediate bar, and is supported so as to be able to rise and fall. The first screen has a first insertion hole that passes through a protrusion formed at the apex of each pleat on the back side, and the second screen has a second insertion hole that passes through the screen. The lifting cord hangs down from directly below the midpoint between the first and second winding drums in the parallel direction of the first and second winding drums, and passes through the first and second insertion holes.

This improves the design of the blinds and prevents light leakage, while easily keeping the middle bar at the bottom end of the first screen and the bottom rail at the bottom end of the second screen horizontal in their short direction. Here, the protrusions may be formed by overlapping the peaks of the pleats for a predetermined length (e.g., 1 cm) and joining them by welding or the like, or may be formed by joining a protruding piece separately to the peak.

The second screen may have a plurality of cylindrical cells, and the second insertion hole may pass through each of the cells.

By making the second screen a honeycomb screen with multiple cylindrical cells, it can be combined vertically with the first screen, a pleated screen, reducing the load on the lifting cord, reducing the operating load and increasing durability, and further preventing light leakage from both the first and second screens.

The first insertion hole and the second insertion hole may be arranged on the same straight line in the lifting direction.

This allows the lifting cord to hang down in a straight line, reducing the load on the lifting cord, reducing the operating load, and increasing durability. In addition, by inserting the lifting cord in a straight line through the protrusions formed at the apexes of each pleat on the back side of the first screen and each cell of the second screen, it is possible to roughly match the opening amount of the pleats of the first screen and the opening amount of the cells of the second screen, improving the design.

The center line of the first screen in the parallel direction does not have to coincide with the center line of the second screen in the parallel direction.

As a result, the center lines of the first screen and the second screen in the front-to-back direction do not coincide, making it possible to align the positions of the insertion holes of both screens in the front-to-back direction, reducing the load on the lifting cord, reducing the operating load, and increasing durability.

The first screen may be connected to the intermediate bar at a position offset forward from the center line of the intermediate bar in the fore-and-aft direction.

This allows the first insertion hole formed on the back side of the first screen to be located on a vertical line at approximately the center position of the intermediate bar in the front-to-rear direction, making it possible to arrange the first insertion hole and the second insertion hole in a straight line in the vertical direction.

A blind according to another embodiment of the present invention has a head box, a winding drum, and a screen. The head box can be installed on a predetermined surface, and the winding drum is provided inside the head box. The screen has a plurality of pleats, and is supported so as to be able to be raised and lowered by a lifting cord, one end of which is connected to the winding drum and the other end of which is connected to a bottom rail. The screen has a protrusion with an insertion hole formed at the apex of each pleat on the rear side. The lifting cord hangs down from directly below the center position of the winding drum in the front-to-rear direction of the screen, and passes through the insertion hole.

This allows the blinds to improve design and prevent light leakage while easily keeping the bottom rail at the bottom edge of the screen horizontal in the short direction.

A blind according to another embodiment of the present invention includes a head box that can be installed on a predetermined surface, a dimmer cord and a lift cord that hang down from the head box so that they can be raised and lowered, a first screen, and a second screen. The first screen is a foldable screen, and is supported so that it can be raised and lowered by inserting the dimmer cord connected to the intermediate bar. The second screen is a foldable screen, and is connected to the first screen and supported so that it can be raised and lowered by inserting the lift cord connected to the bottom rail through the intermediate bar. At least one of the first screen and the second screen has an insertion hole that passes through a protrusion formed at the apex of each pleat on the back side. The screen in which the insertion hole is formed is connected to the intermediate bar or the bottom rail at a position offset forward from the center line of the intermediate bar or the bottom rail in the front-to-rear direction. The dimmer cord and the lift cord are arranged near the center lines of the intermediate bar and the bottom rail in the front-to-rear direction.

This allows at least one of the first and second screens to be positioned offset forward from the center line in the front-to-rear direction, while the dimmer cord and lift cord are located near the center line of the middle bar and bottom rail, so that each bar can be kept horizontal in its short direction, and the screens placed above and below can be freely combined.

As described above, the present invention improves design and prevents light leakage while easily keeping the bar at the bottom edge of the screen horizontal in the short direction. However, this effect does not limit the present invention.

1 is a front view of a blind according to an embodiment of the present invention. FIG. 2 is a rear view of the blind of FIG. 1 . FIG. 4 is a right-side cross-sectional view of the blind. An enlarged cross-sectional side view of the blind near the middle bar. FIG. 2 is a front view showing the state in which the first screen of the blind is unfolded and the second screen is folded up. This is a front view showing the state in which the first screen of the above-mentioned blind is folded and the second screen is deployed. These are right side views showing the blind in the state where only the first screen is deployed, the state where only the second screen is deployed, and the state where both screens are folded up. FIG. 11 is an enlarged right-side cross-sectional view of the vicinity of the intermediate bar of a blind according to another embodiment of the present invention. FIG. 11 is a right-side cross-sectional view of a blind according to another embodiment of the present invention. FIG. 11 is an enlarged right-side cross-sectional view of the vicinity of the intermediate bar of a blind according to another embodiment of the present invention. FIG. 11 is an enlarged right-side cross-sectional view of the vicinity of the intermediate bar of a blind according to another embodiment of the present invention. FIG. 11 is an enlarged right-side cross-sectional view of the vicinity of the intermediate bar of a blind according to another embodiment of the present invention. FIG. 11 is an enlarged right-side cross-sectional view of the vicinity of the intermediate bar of a blind according to another embodiment of the present invention.

The following describes an embodiment of the present invention with reference to the drawings.

[Blinds configuration]
Fig. 1 is a front view of the blind according to the present embodiment, and Fig. 2 is a rear view of the blind. In both figures, the inside of the head box is shown exposed for the sake of convenience, but in reality it is covered with a cover. Fig. 3 is a right side cross-sectional view of the blind, and Fig. 4 is an enlarged side cross-sectional view of the blind near the middle bar.

As shown in these figures, the blind 100 according to this embodiment has a head box 1 as a support member, and a first screen 2 and a second screen 5 as shielding materials that are supported by the head box 1 so that they can be raised and lowered.

An intermediate bar 3 is connected to the lower end of the first screen 2 and the upper end of the second screen 5, and a bottom rail 6 is connected to the lower end of the second screen.

The first screen 2 is a pleated screen formed by folding a number of pleats in an accordion-like shape in the Y direction of the figure so that they can be folded and unfolded. The fabric of the first screen 2 is made of, for example, a material with high light-blocking properties that does not transmit light, or a see-through material that allows light to pass through. The front-to-back width (length in the Z direction) of the first screen 2 when folded is, for example, 30 to 35 mm.

As shown in Figures 3 and 4, the upper end of the first screen 2 is connected to the head box 1, and the lower end of the first screen 2 is connected to the intermediate bar 3 via the first screen stop plate 17.

As shown in Figures 3 and 4, a protrusion 21 is formed on each pleat on the back side of the first screen 2. The protrusion 21 is formed, for example, by overlapping the peaks of each pleat by a predetermined length (e.g., 5 to 10 mm) from the apex 2a and joining them by welding or the like.

A first insertion hole 25 is formed in the protrusion 21. The dimmer cord 4 and the lift cord 7 hang down from the head box 1 and pass through the first insertion hole 25. The lower end of the dimmer cord is connected to the intermediate bar 3 by being inserted through the cord guide 19 of the intermediate bar 3 and being engaged therewith.

In this way, by not exposing the lift cord 4 and the first insertion hole 25 that pass through the first screen 2 on the screen surface side, it is possible to improve the design and prevent light leakage from the insertion hole.

As shown in Figures 3 and 4, the second screen 5 is a honeycomb screen formed by connecting multiple cylindrical cells with a hexagonal cross section in the Y direction of the figure, so that it can be folded and unfolded. The front-to-back width (length in the Z direction) of the second screen 5 when folded is, for example, 45 mm. The cell pitch (amount of cell opening in the Y direction) of the second screen 5 when unfolded is approximately the same as the pleat pitch (amount of pleat opening in the Y direction) of the first screen 2 when unfolded. The fabric of the honeycomb screen is formed, for example, from a material that does not transmit light, but may also be formed from a see-through material.

As shown in Figures 3 and 4, the upper end of the second screen 5 is connected to the intermediate bar 3 via the second screen stop plate 18, and the lower end of the second screen 5 is connected to the bottom rail 6.

The second screen 5 has a lifting cord 7 hanging down from the head box 1 inserted through it.

As shown in Figures 3 and 4, second insertion holes 55 are formed at each end of each cell of the second screen 5 in the up-down direction (Y direction in each figure) and approximately in the center in the front-rear direction (Z direction in each figure).

As shown in FIG. 3, the lift cord 7 hangs down from directly below the approximate midpoint between the light adjustment drum 9a and the lift drum 9b in the parallel direction (Z direction) of the light adjustment drum 9a and the lift drum 9b, passes through the first insertion hole 25 and the second insertion hole 55, and its lower end is connected to the bottom rail 6.

The first screen 2 can be unfolded by raising and lowering the middle bar 3 by raising and lowering the dimmer cord 4, and the second screen 5 can be unfolded by raising and lowering the bottom rail 6 by raising and lowering the lift cord 7.

The head box 1 has a horizontally elongated rectangular parallelepiped shape and is fixed to a predetermined surface such as the ceiling surface or wall surface of a window frame inside a building via a bracket 8 with screws or the like. As shown in Figures 1 to 3, the head box 1 is provided with two winding drums 9 (a light control drum 9a as the first winding drum and a lifting drum 9b as the second winding drum).

The light adjustment drum 9a and the lifting drum 9b are arranged in parallel inside the head box 1, and are rotatably supported by the rotating shafts 10a and 10b passing through them, respectively.

One end of the above-mentioned light control cord 4 is connected to the light control drum 9a so that it can be wound and unwound. One end of the above-mentioned lifting cord 7 is connected to the lifting drum 9b so that it can be wound and unwound.

The stoppers 12a and 12b can be switched between a state that allows rotation of the corresponding rotating shafts 10a and 10b in the unwinding direction and a state that restricts rotation.

The brakes 11a and 11b reduce the unwinding speed of the dimmer cord 4 and the lift cord 7 (the rotation speed of the dimmer drum 9a and the lift drum 9b), respectively, thereby mitigating the impact force from the intermediate bar 3 when the first screen 2 is lowered, and the impact force from the bottom rail 6 when the second screen 5 is lowered.

In addition, the head box 1 is also provided with an interlocking mechanism that switches between an independent state in which the rotating shaft 10a of the light adjustment drum 9a and the rotating shaft 10b of the lift drum 9b rotate independently and an interlocking state in which they rotate in conjunction with each other.

The operation unit 13 is composed of an endless operation cord 14 (e.g., a ball chain), a pulley 15 around which the operation cord 14 is wound, and an operation shaft connected to the pulley 15 so as to rotate together with it, and raises and lowers the first screen 2 and the second screen 5 in response to the user's raising and lowering operation of the operation cord 14.

Of the above-mentioned operating cords 14, the chain at the back when viewed from the front is used to raise and lower the dimmer cord 4 (first screen 2 and middle bar 3), and the chain at the front is used to raise and lower the lifting cord 7 (second screen 5 and bottom rail 6).

The intermediate bar 3 has openings at both longitudinal ends to allow the lower end of the first screen 2 and the upper end of the second screen 5 to be inserted during assembly, and rail caps 30 are removably provided in the openings. Similarly, rail caps 60 are removably provided in the openings at both longitudinal ends of the bottom rail 6 to allow the lower end of the second screen 2 to be inserted. The rail caps 30 provided at both ends of the intermediate bar 3 are connected to the lower ends of the dimmer cords 4.

As shown in Figures 3 and 4, the first screen 2 is connected to the intermediate bar 3 at a position offset forward from the center line of the intermediate bar 3 in the front-to-rear direction (Z direction).

In contrast, as shown in FIG. 3, the second screen 5 is connected to the bottom rail 6 at a position corresponding to the center line of the bottom rail 6 in the front-to-rear direction (Z direction).

As shown in FIG. 4, the center line C1 of the first screen 2 in the front-to-back direction (Z direction) of the first screen 2 does not coincide with the center line C2 of the second screen 5 in the front-to-back direction (Z direction).

This makes it possible to position the first insertion hole 25 formed in the protruding portion 21 of the first screen 2 on a vertical line at approximately the center position in the fore-and-aft direction of the intermediate bar 3, and to position the first insertion hole 25 and the second insertion hole 55 on a straight line in the vertical direction.

[Blinds Operation]
Next, the operation of the blind 100 configured as above will be described.

Figure 5 is a front view showing the state in which the first screen 2 of the blind 100 is unfolded and the second screen 5 is folded. Figure 6 is a front view showing the state in which the first screen 2 of the blind 100 is folded and the second screen 5 is unfolded. Figure 7 is a right side view showing the state in which only the first screen 2 of the blind 100 is unfolded (Figure A), the state in which only the second screen 5 is unfolded (Figure B), and the state in which both screens are folded (Figure C).

When unfolding the first screen 2 and folding the second screen 5 from the state shown in Figures 1 and 2, the operating cord 14 is operated to rotate the rotating shaft 10a a specified amount in the direction of winding the light control cord 4, and the stopper 12a is released. This releases the rotating shaft 10a from the restraint of the stopper 12a and makes it free to rotate, and the light control drum 9a unwinds the light control cord 4 due to the weight of the intermediate bar 3, and the intermediate bar 3 descends together with the other end of the light control cord 4. Thus, the second screen 5 is folded up sequentially from top to bottom.

As shown in Figures 5 and 7A, when the second screen 5 is completely folded, only the first screen 2 remains deployed. After this, when the operation of the operating cord 14 is finished, the intermediate bar 3, which has lowered under its own weight, is placed on the bottom rail 6, and the state in which only the first screen 2 remains deployed is maintained.

On the other hand, when folding the first screen 2, the operating cord 14 is operated to rotate the rotating shaft 10a continuously for a predetermined amount or more in the direction of winding the light control cord 4. This causes the light control drum 9a to wind up the light control cord 4, and the middle bar 3 rises together with the other end of the light control cord 4. Thus, the first screen 2 is folded sequentially from the bottom to the top.

As shown in Figures 6 and 7B, when the first screen 2 is completely folded, only the second screen 5 is deployed. After this, when the operation of the operating cord 14 is terminated, the rotation of the rotating shaft 10a is restricted by the stopper, and only the second screen 5 is maintained in the deployed state.

Next, we will explain the case where both the first screen 2 and the second screen 5 are folded. When both the first screen 2 and the second screen 5 are deployed, the dimmer cord 4 is in a tensioned state, so the interlocking mechanism is in a standalone state.

First, the operating cord 14 is operated to rotate only the rotating shaft 10b continuously for a predetermined amount or more in the direction of winding the lifting cord 7, and the rotating shaft 10b rotates, causing the lifting drum 9b to wind up the lifting cord 7 and fold up the second screen 5.

Then, the operating cord 14 is continued to be operated to wind the lifting cord 7 onto the lifting drum 9b. This causes the fully folded second screen 5 to come into contact with the middle bar 3, and the bottom rail 6 pushes up the middle bar 3.

As a result, the weight of the intermediate bar 3 is no longer applied to the dimmer cord 4, so it slackens, and the interlocking mechanism is in an interlocking state. As a result, the rotating shaft 10a and the rotating shaft 10b rotate together, and the lifting drum 9b winds up the lifting cord 7, and the dimmer drum 9a winds up the dimmer cord 4.

As a result, the bottom rail 6 and the intermediate bar 3 rise together, and the first screen 2 is folded up one by one from the bottom to the top. As a result, the first screen 2 is also completely folded up, as shown in Figure 7C.

After this, when the operation of the operating cord 14 is finished, the rotation of the rotating shafts 10a and 10b is restricted by the stoppers 12a and 12b, respectively. Therefore, the first screen 2 and the second screen 5 are maintained in the folded state.

When unfolding the first screen 2 and the second screen 5, the operating cord 14 is operated to release the stopper 12b. This causes the bottom rail 6 and the second screen 5, the intermediate bar 3 and the first screen 2 to each descend under their own weight, and the first screen 2 and the second screen 5 are unfolded.

During such lifting and lowering operations, the first insertion hole 25 and the second insertion hole 55 are arranged on the same straight line in the lifting and lowering direction (Y direction), so that the lifting and lowering cord 7 can be hung down in a straight line, reducing the load on the lifting and lowering cord 7, reducing the operating load, and increasing durability.

[summary]
As described above, according to this embodiment, the blind 100 improves the design and prevents light leakage by not exposing the lifting/lowering cord 4 and the first insertion hole 25 that pass through the first screen 2 to the screen surface side, while forming the first insertion hole 25 and the second insertion hole 55 on the same straight line in the vertical direction and hanging the lifting/lowering cord 4 in a straight line, the intermediate bar 3 at the lower end of the first screen 2 and the bottom rail 6 at the lower end of the second screen 5 can be easily kept horizontal in their short side direction. In addition, by inserting the lifting/lowering cord 4 in a straight line through the first insertion hole 25 of the protruding portion 21 of the first screen 2 and the second insertion hole 55 of each cell of the second screen 5, it is possible to make the opening amount of the pleats of the first screen 2 (pleat pitch in the Y direction) and the opening amount of the cells of the second screen 5 (cell pitch in the Y direction) almost equal to each other, thereby improving the design.

[Modification]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present technology.

In the above embodiment, the first screen 2 is connected to the intermediate bar 3 at a position offset forward from the center line of the intermediate bar 3 in the front-to-rear direction (Z direction), and the center lines of the first screen 2 and the second screen 5 in the front-to-rear direction (Z direction) do not coincide. However, the first screen 2 may have its center on the center line of the intermediate bar 3 in the front-to-rear direction. Figure 8 is an enlarged right-side cross-sectional view of the vicinity of the intermediate bar 3 of a blind 100 relating to this embodiment.

As shown in the figure, the length of the first screen 2 in the front-to-rear direction (Z direction) when folded in this configuration is designed to be longer (e.g., 45 mm) than in the above embodiment, and the width (length in the Z direction) of the protrusion 21 formed by joining the pleats on the rear side is correspondingly larger.

The first insertion hole 25 is formed at the center position of the first screen 2 in the front-to-rear direction (Z direction) when the first screen 2 is folded.

On the other hand, the second screen 5 is the same as in the above embodiment, so that the center line C1 of the first screen 2 in the front-to-back direction (Z direction) and the center line C2 of the second screen 5 in the front-to-back direction (Z direction) coincide with each other.

As a result, the centers of gravity of the first screen 2 and the intermediate bar 3 coincide at the center in the front-to-back direction (Z direction), suppressing tilt of the intermediate bar 3 in the front-to-back direction.

In each of the above-described embodiments, the blind 100 is separated into the first screen 2 and the second screen 5 by the intermediate bar 3, but the present invention can also be applied to blinds that do not have an intermediate bar 3 and have only a single pleated screen. Figure 9 is a right-side cross-sectional view showing such a blind 100.

The blind 100 in the figure has a head box 1, a winding drum 9, and a pleated screen 2. The pleated screen 2 is supported so that it can be raised and lowered by a lifting cord 7, one end of which is connected to the winding drum 9 and the other end of which is connected to a bottom rail 6.

The pleated screen 2 has a protrusion 21 with an insertion hole 25 formed at the apex 2a of each pleat on the back side. The lifting cord 7 hangs down from directly below the approximate center position C of the winding drum 9 in the front-to-rear direction (Z direction) of the pleated screen 2 and passes through the insertion hole 25.

In this way, even in a configuration with a single pleated screen 2, the bottom rail 6 at the bottom end of the screen can be easily kept horizontal in its short direction (Z direction) while improving the design and preventing light leakage.

Even with such a single pleated screen 2, the width of the protrusion 21 can be changed as shown in Figure 8 above.

In the above embodiment, the protrusion 21 is formed by overlapping the peaks of the pleats at a predetermined length from the apex 2a and joining them by welding or the like, but it may be joined by a method other than welding, or a flat protrusion may be joined to the apex 2a separately from the pleats.

[Modifications of the combination of the first and second screens]
In the above-described embodiment, the first screen 2 is a pleated screen and the second screen is a honeycomb screen, but the combination of screens used as the first screen 2 and the second screen 5 is not limited to this.

Figures 10 to 13 show modified examples of this combination. Each of Figures 10 to 13 is an enlarged cross-sectional view of the right side of the intermediate bar 3 of the blind 100 according to the modified example.

In this combination, the first screen 2 and the second screen 5 are both foldable screens, and the first screen 2 is supported so that it can be raised and lowered by connecting a dimmer cord 4 connected to the intermediate bar 3, and the second screen 5 is connected to the first screen 2 and supported so that it can be raised and lowered by inserting a lifting cord 7 connected to the bottom rail 6 through the intermediate bar 3. In this case, the lifting cord 7 may be inserted through the first screen 2 and then through the intermediate bar 3, or it may not be inserted through the first screen 2, but may instead be inserted through the intermediate bar 3, for example, by hanging down the rear side of the first screen 2 in the front-to-rear direction (Z direction).

At least one of the first screen 2 and the second screen 5 has an insertion hole 25 through which a protrusion 21 formed at the apex 2a of each pleat on the rear side is inserted. The screen in which the insertion hole 25 is formed is connected to the intermediate bar 3 or the bottom rail 6 at a position offset forward from the center line of the intermediate bar 3 or the bottom rail 6 in the front-to-rear direction (Z direction). The dimmer cord 4 and the lift cord 7 are arranged near the center line of the intermediate bar 3 and the bottom rail 6 in the front-to-rear direction.

In addition, the position of the apex 2a on the front side in the Z direction of the folded pleats of the screen in which the insertion holes 25 are formed may be approximately the same as the position of the end of the front side in the Z direction of the intermediate bar 3 or bottom rail 6.

Figure 10 shows an example in which a pleated screen having an insertion hole 25 through which the protrusion 21 according to the above-mentioned embodiment is inserted is used for both the first screen 2 and the second screen 5.

The fabric of the first screen 2 is made of, for example, a see-through material that allows light to pass through. On the other hand, the fabric of the second screen 5 is made of, for example, a material that does not allow light to pass through and has high light-blocking properties.

In this example, both the first screen 2 and the second screen 5 are offset forward of the center line in the front-to-rear direction of the intermediate bar 3 and the bottom rail 6 (the first screen stop plate 17 and the second screen stop plate 18 are connected to the intermediate bar 3 on the Z-direction front side), and the dimmer cord 4 and the lift cord 7 are positioned near the center line.

Figure 11 shows an example in which a conventional pleated screen that does not have a protrusion 21 but has a through hole 111 in the center is used as the first screen 2, and a pleated screen that has the protrusion 21 and a through hole 25 is used as the second screen 5.

In this example, a conventional pleated screen is used as the first screen 2, and since it is connected to the middle bar 3 near the center in the front-to-rear direction, the shape of the upper part of the middle bar 3 and the shape of the first screen stopper plate 17 are changed accordingly.

Figure 12 shows an example in which the first screen 2 is a honeycomb screen similar to that used as the second screen 5 in the above embodiment, and the second screen 5 is a pleated screen having the above-mentioned protrusions 21 and insertion holes 25. In other words, this example has a configuration in which the first screen 2 and second screen 5 shown in the above embodiment are interchanged.

In FIG. 13, a pleated screen having the above-mentioned protrusions 21 and insertion holes 25 is used as the first screen 2, and two pleated screens having the above-mentioned protrusions 21 and insertion holes 25 are combined by overlapping the respective protrusions 21 and insertion holes 25 so that they are symmetrical in the front-to-rear direction as two pleated screens are used as the second screen 5. Due to the structure of this second screen 5, the second screen stop plate 18 has also been modified to a shape that allows two pleated screens to be connected.

As shown in these four modified examples, at least one of the first screen 2 and the second screen 5 is positioned offset forward from the center line in the front-to-back direction, but the dimmer cord 4 and the lift cord 7 are positioned near the center line of the intermediate bar 3 and the bottom rail 6, so that the intermediate bar 3 and the bottom rail 6 can be kept horizontal in the front-to-back direction (Z direction), and the screens placed above and below can be freely combined.

[Other Modifications]
In the above embodiment, the lifting cord 7 is hung from just below the approximate middle position in the Z direction between the two parallel winding drums (the light control drum 9a and the lifting drum 9b) and is inserted through the first insertion hole 25 of the protruding portion 21. However, the lifting cord 7 may be hung from slightly behind the middle position between the two winding drums in the front-rear direction (Z direction), and the protruding portion 21 may be disposed slightly behind the above embodiment so that the insertion hole 25 is located in the hanging direction. In this case, the position of the front apex portion 2a of the pleat in the front-rear direction (Z direction) is not changed from the above embodiment, and the width of the pleat in the front-rear direction (Z direction) is larger than that of the above embodiment. That is, the pitch of each pleat when the screen is unfolded is larger, and the number of pleats is reduced, so that the folding allowance when the screen is folded can be reduced.

Furthermore, in the above-mentioned embodiment and modified examples, the blinds 100 may be adapted to use a so-called cord-type lifting method, in which a cord is used to raise and lower the screen instead of a winding drum.

REFERENCE SIGNS LIST 1 Head box 2 First screen 3 Intermediate bar 4 Light control cord 5 Second screen 6 Bottom rail 7 Lifting cord 9 Winding drum 9a Light control drum 9b Lifting drum 21 Protrusion 25 Insertion hole (first insertion hole)
55: Second insertion hole 100: Blind C1: Center line of first screen C2: Center line of second screen

Claims (5)

A head box that can be installed on a predetermined surface;
A dimmer cord and a lift cord hanging down from the head box so as to be liftable and lowerable;
A first screen is a foldable screen, and is supported so as to be liftable and lowerable by inserting the dimmer cord connected to an intermediate bar;
a second screen that is foldable and is connected to the first screen by inserting the lifting cord connected to a bottom rail through the intermediate bar, and is supported so as to be liftable and lowerable;
Equipped with
The first screen has a first insertion hole through which a protrusion formed at an apex of each pleat on the back side is inserted, and the second screen has a second insertion hole through which the second screen is inserted,
the first screen is connected to the intermediate bar at a position where a center line of the first screen in a front-to-rear direction is offset forward from a center line of the intermediate bar in a front-to-rear direction,
the position of the apex of the front side of the folded pleat of the first screen substantially coincides with the position of the end of the front side of the intermediate bar ;
A blind, wherein a center line of the first screen in the front-to-rear direction does not coincide with a center line of the second screen in the front-to-rear direction. A head box that can be installed on a predetermined surface;
A dimmer cord and a lift cord hanging down from the head box so as to be liftable and lowerable;
A first screen is a foldable screen, and is supported so as to be liftable and lowerable by inserting the dimmer cord connected to an intermediate bar;
a second screen that is foldable and is connected to the first screen by inserting the lifting cord connected to a bottom rail through the intermediate bar, and is supported so as to be liftable and lowerable;
Equipped with
The first screen has a first insertion hole through which the first screen is inserted, and the second screen has a second insertion hole through which a protrusion formed at an apex of each pleat on the back side is inserted,
the second screen is connected to the bottom rail at a position where a center line of the second screen in a front-to-rear direction is offset forward from a center line of the bottom rail in a front-to-rear direction,
the position of the apex of the front side of the folded pleat of the second screen substantially coincides with the position of the end of the front side of the bottom rail;
A center line of the first screen in the front-rear direction does not coincide with a center line of the second screen in the front-rear direction.
BLIND. A head box that can be installed on a predetermined surface;
A dimmer cord and a lift cord hanging down from the head box so as to be liftable and lowerable;
A first screen is a foldable screen, and the first screen is supported so as to be able to be raised and lowered by inserting the light control cord connected to an intermediate bar;
A second screen is a foldable screen, and the lifting cord connected to a bottom rail is inserted through the intermediate bar to be connected to the first screen and supported so as to be liftable and lowerable;
Equipped with
The first screen has a first insertion hole through which the first screen is inserted, and the second screen has a second insertion hole through which a protrusion formed at an apex of each pleat on the back side is inserted,
the second screen is connected to the intermediate bar at a position where a center line of the second screen in a front-to-rear direction is offset forward from a center line of the intermediate bar in a front-to-rear direction,
the position of the apex of the front side of the folded pleat of the second screen substantially coincides with the position of the end of the front side of the intermediate bar;
A center line of the first screen in the front-rear direction does not coincide with a center line of the second screen in the front-rear direction.
BLIND. A blind according to any one of claims 1 to 3 ,
The first insertion hole and the second insertion hole are arranged on the same straight line in the lifting and lowering direction. A blind according to any one of claims 1 to 4,
A blind, wherein one of the first screen and the second screen is made of a light-opaque material and the other screen is made of a light-transmitting material.

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