JP2023100950A - Blind - Google Patents

Abstract

To easily maintain a horizontal state of a bar of a screen bottom edge in a width direction, while improving designability and preventing light leakage.SOLUTION: The blind has a first screen and a second screen. The first screen has a plurality of pleats, and is supported to move up and down by being inserted with a lighting control cord, having one end connected to a first winding drum and the other end connected to an intermediate bar. The second screen is a foldable screen which is connected to the first screen by being inserted with a lifting/lowering cord, having one end connected to a second winding drum and the other end connected to a bottom rail, via the first screen and the intermediate bar, and is supported to move up and down. The first screen has a first insertion hole on an apex part of each pleat on a rear side. The second screen has a second insertion hole. The lifting/lowering cord is suspended from directly below an intermediate position of the first winding drum and the second winding drum, and is inserted into the first insertion hole and the second insertion hole.SELECTED DRAWING: Figure 4

Description

The present invention relates to blinds.

2. Description of the Related Art Conventionally, there is a blind called a pleated screen that can adjust the amount of light by raising and lowering a screen that can be folded into a bellows shape.

In Patent Document 1 below, an intermediate rail is suspended from a head box via a first elevating cord, and a bottom rail is suspended via a second elevating cord, thereby connecting the head box and the intermediate rail. A pleated screen supporting an upper screen therebetween and supporting a lower screen between the intermediate rail and the bottom rail, wherein the lower end of the first lifting cord passes through the center of gravity determined by the shape of the intermediate rail A pleated screen is disclosed that is attached to the intermediate rail at a position near the center of gravity.

In addition, in the above Patent Document 1, the upper screen is provided with joint pieces at both upper and lower edges of the fabric with folds in the middle part in the vertical direction, and each joint piece of the upper screen has a round hole or a long hole. It is also disclosed that formed insertion holes are provided, and the first lifting cord and the second lifting cord hanging from the head box are inserted through the insertion holes.

JP 2015-218429 A

However, in the technique described in Patent Document 1, since the insertion holes formed in the pleated screen are not exposed from the front of the screen, it is possible to improve the design and prevent light leakage. Therefore, in order to keep the intermediate rail horizontal in its short direction, the lower end of the lifting cord is attached to the intermediate rail at a position near the center of gravity of the intermediate rail. In addition, it was necessary to adjust the mounting position.

In view of the circumstances as described above, an object of the present invention is to provide a blind that can easily keep the bar at the bottom end of the screen horizontal in its short direction while improving design and preventing light leakage. to do.

To achieve the above object, a blind according to one aspect of the present invention includes a headbox, first and second winding drums, a first screen, and a second screen. The headbox can be installed on a predetermined surface, and the first winding drum and the second winding drum are provided in parallel in the headbox. The first screen has a plurality of pleats, and is supported so as to be able to move up and down 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 an elevating cord having one end connected to the second winding drum and the other end connected to the bottom rail is inserted through the first screen and the intermediate bar. By doing so, it is connected to the first screen and supported so as to be able to move up and down. The first screen has first insertion holes through which protrusions formed at the vertex of each pleat on the back side are inserted, and the second screen has second insertion holes through which the screen is inserted. The elevating cord hangs down from directly below an intermediate position between the first winding drum and the second winding drum in the parallel direction of the first winding drum and the second winding drum, and extends from the first insertion hole and the second winding drum. It is inserted through the second insertion hole.

As a result, the blind can easily keep the intermediate bar at the lower end of the first screen and the bottom rail at the lower end of the second screen horizontal in the short direction thereof, while improving the design and preventing light leakage. Here, the protruding portion may be formed by stacking peaks of a predetermined length (for example, 1 cm) from the apex of the pleats and joining them by welding or the like, or may be formed by separately joining a protruding piece to the apex. good.

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

As a result, by making the second screen a honeycomb screen having a plurality of cylindrical cells, the load on the lifting cord is reduced while the pleated screen, which is the first screen, is combined vertically, the operating load is reduced, and the durability is improved. can be increased, and light leakage can be prevented 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 elevation direction.

As a result, the lifting cord can be hung in a straight line, the load on the lifting cord can be reduced, the operating load can be reduced, and the durability can be improved. In addition, the lifting cord is inserted straight through the protruding portion formed at the apex of each pleat on the back side of the first screen and each cell of the second screen, so that the amount of opening of the pleats of the first screen is adjusted. It is possible to substantially match the opening amount of the cells of the second screen with that of the second screen, and the design can be improved.

The centerline of the first screen in the parallel direction and the centerline of the second screen in the parallel direction may not coincide.

As a result, since the center lines of the first screen and the second screen do not match in the front-rear direction, it becomes possible to match the positions of the insertion holes of both screens in the front-rear direction, thereby reducing the load on the lifting cords. It is possible to reduce the operating load and increase the durability.

The first screen may be connected to the intermediate bar at a position offset to the front of the longitudinal center line of the intermediate bar.

As a result, the first insertion hole formed on the back side of the first screen can be provided on the vertical line at the center position of the intermediate bar in the front-rear direction, and the first insertion hole and the second insertion hole can be arranged vertically. can be arranged on a straight line.

A blind according to another aspect of the present invention includes a headbox, a winding drum, and a screen. The headbox can be installed on a predetermined surface, and the winding drum is provided in the headbox. The screen has a plurality of pleats and is liftably supported by a lifting cord having one end connected to the winding drum and the other end connected to the bottom rail. The screen has protruding portions formed with insertion holes at the vertex of each pleat on the back side. The elevating cord hangs from directly below the center position of the winding drum in the front-rear direction of the screen and is inserted through the insertion hole.

Thereby, the blind can easily keep the bottom rail at the lower end of the screen in a horizontal state in the width direction while improving the design and preventing light leakage.

A blind according to still another aspect of the present invention has a head box that can be installed on a predetermined surface, a light control cord and a lifting cord that vertically hang down from the head box, a first screen, and a second screen. . The first screen is a screen that can be folded, and is supported so as to be able to move up and down by inserting the light control cord connected to the intermediate bar. The second screen is a collapsible screen, and is connected to the first screen by inserting the elevating cord connected to the bottom rail through the intermediate bar and supported so as to be able to move up and down. At least one of the first screen and the second screen has an insertion hole through which the protruding portion formed at the vertex of each pleat on the back side is inserted. 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-rear direction. The dimming cord and the lifting cord are arranged in the vicinity of center lines in the front-rear direction of the intermediate bar and the bottom rail.

As a result, while at least one of the first screen and the second screen is provided at a position offset forward from the centerline in the front-rear direction, the dimming cord and the lifting cord are arranged near the centerline of the intermediate bar and the bottom rail. By doing so, each bar can be kept horizontal in its width direction, and the screens arranged above and below can be freely combined.

As described above, according to the present invention, it is possible to easily keep the bar at the lower end of the screen horizontally in the short direction while improving the design and preventing light leakage. However, this effect does not limit the invention.

1 is a front view of a blind according to one embodiment of the present invention; FIG. Figure 2 is a rear view of the blind of Figure 1; It is a right side sectional view of the above-mentioned blind. It is an enlarged side cross-sectional view of the vicinity of the intermediate bar of the blind. It is the front view which showed the state which unfolded the 1st screen of the said blind, and folded the 2nd screen. It is the front view which showed the state which folded the 1st screen of the said blind, and expanded the 2nd screen. FIG. 4 is a right side view showing a state in which only the first screen of the blind is unfolded, a state in which only the second screen is unfolded, and a state in which both screens are folded. FIG. 10 is an enlarged right side cross-sectional view of the vicinity of an intermediate bar of a blind according to another embodiment of the present invention; FIG. 4 is a right cross-sectional view of a blind according to another embodiment of the present invention; FIG. 10 is an enlarged right side cross-sectional view of the vicinity of an intermediate bar of a blind according to another embodiment of the present invention; FIG. 10 is an enlarged right side cross-sectional view of the vicinity of an intermediate bar of a blind according to another embodiment of the present invention; FIG. 10 is an enlarged right side cross-sectional view of the vicinity of an intermediate bar of a blind according to another embodiment of the present invention; FIG. 10 is an enlarged right side cross-sectional view of the vicinity of an intermediate bar of a blind according to another embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Blind configuration]
FIG. 1 is a front view of a blind according to this embodiment, and FIG. 2 is a rear view of the blind. In both figures, for convenience of explanation, the inside of the headbox is shown exposed, but it is actually covered with a cover. 3 is a right sectional view of the blind, and FIG. 4 is an enlarged side sectional view of the blind near the intermediate bar.

As shown in these figures, the blind 100 according to the present embodiment includes a head box 1 as a support member, and a first screen 2 and a second screen 5 as shielding materials that are vertically supported by the head box 1. and

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 in which a plurality of pleats that are folded in the Y direction in the figure into a bellows shape are formed so that they can be folded and unfolded. The material of the first screen 2 is formed of, for example, a highly light-shielding material that does not transmit light or a see-through material that allows light to transmit. The front-to-rear width (length in the Z direction) of the first screen 2 when folded is, for example, 30 to 35 mm.

As shown in FIGS. 3 and 4, the upper end of the first screen 2 is connected to the headbox 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 FIGS. 3 and 4, each pleat on the back side of the first screen 2 is formed with a projecting portion 21 . The projecting portion 21 is formed, for example, by stacking peak portions of a predetermined length (eg, 5 to 10 mm) from the apex portion 2a of each pleat and joining them by welding or the like.

A first insertion hole 25 is formed in the projecting portion 21 . The dimming cord 4 and the lifting cord 7 hang down from the head box 1 and pass through the first insertion hole 25 . The lower end of the dimming cord is connected to the intermediate bar 3 by being inserted through the cord guide 19 of the intermediate bar 3 and locked.

Thus, by not exposing the lifting cord 4 and the first insertion hole 25 through the first screen 2 to the screen surface side, it is possible to improve the design and prevent light leakage from the insertion hole.

As shown in FIGS. 3 and 4, the second screen 5 is a honeycomb screen formed by connecting a plurality of cylindrical cells having a hexagonal cross section in the Y direction of the figure so that they can be folded and unfolded. The front-to-rear width (the length in the Z direction) of the second screen 5 when folded is, for example, 45 mm. The cell pitch (the amount of cell opening in the Y direction) when the second screen 5 is deployed substantially matches the pleat pitch (the amount of opening of the pleats in the Y direction) when the first screen 2 is deployed. The material of the honeycomb screen is made of, for example, a material that does not transmit light, but it may be made of a see-through material.

As shown in FIGS. 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. .

A lifting cord 7 suspended from the head box 1 is inserted through the second screen 5 .

As shown in FIGS. 3 and 4, at each end in the vertical direction (the Y direction in each drawing) of each cell of the second screen 5 and at the approximate center in the front-rear direction (the Z direction in each drawing), a second cell is provided. An insertion hole 55 is formed.

As shown in FIG. 3, the elevating cord 7 is suspended from directly below a substantially intermediate position between the light control drum 9a and the elevating drum 9b in the parallel direction (Z direction) of the light control drum 9a and the elevating drum 9b. 1 insertion hole 25 and the said 2nd insertion hole 55, and the lower end is connected with the bottom rail 6. As shown in FIG.

The first screen 2 can be deployed by raising and lowering the intermediate bar 3 by raising and lowering the light control cord 4, and the second screen 5 can be raised and lowered by the bottom rail 6 by raising and lowering the raising and lowering cord 7. It is said that it can be deployed by

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

The light control drum 9a and the elevating drum 9b are arranged side by side inside the head box 1, and are rotatably supported by a rotating shaft 10a and a rotating shaft 10b, respectively.

One end of the light control cord 4 is connected to the light control drum 9a so as to be wound and unwound. One end of the lifting cord 7 is connected to the lifting drum 9b so as to be wound and unwound.

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

The brakes 11a and 11b reduce the unwinding speeds of the light control cords 4 and the lifting cords 7 (rotational speeds of the light control drum 9a and the lifting drum 9b), respectively, so that when the first screen 2 is lowered, the intermediate bar 3 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 for switching between an independent state in which the rotary shaft 10a of the light control drum 9a and the rotary shaft 10b of the elevating drum 9b are rotated independently and an interlocked state in which they are rotated in conjunction with each other. there is

The operation unit 13 includes an endless operation cord 14 (for example, 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 integrally. The first screen 2 and the second screen 5 are moved up and down according to the user's lifting operation on the operation code 14 .

Of the operation cords 14, the chain on the back side as viewed from the front is used for the lifting operation of the dimming cord 4 (the first screen 2 and the intermediate bar 3), and the chain on the front side is used for the lifting cord 7 (the second screen). It is used for raising and lowering the screen 5 and the bottom rail 6).

Both ends of the intermediate bar 3 in the longitudinal direction are opened so that the lower end of the first screen 2 and the upper end of the second screen 5 can be inserted during assembly, and rail caps 30 can be attached to and removed from the openings. is provided in Similarly, rail caps 60 are detachably provided in the openings at both ends in the longitudinal direction of the bottom rail 6 so that the lower end of the second screen 2 can be inserted. Rail caps 30 provided at both ends of the intermediate bar 3 are connected to the lower ends of the dimming cords 4 .

As shown in FIGS. 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-rear direction (Z direction). .

On the other hand, 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-rear direction (Z direction).

Further, as shown in FIG. 4, the center line C1 of the first screen 2 in the front-rear direction (Z direction) of the first screen 2 and the center line C2 of the second screen in the front-rear direction (Z direction) of the second screen 5 are do not match.

As a result, the first insertion hole 25 formed in the protruding portion 21 of the first screen 2 can be provided on a vertical line substantially at the center position of the intermediate bar 3 in the front-rear direction. It becomes possible to arrange the insertion hole 55 on a straight line in the vertical direction.

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

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

When the first screen 2 is unfolded and the second screen 5 is folded from the state shown in FIGS. 1 and 2, the operation cord 14 is operated to rotate the rotating shaft 10a by a predetermined amount in the winding direction of the dimming cord 4, and the stopper is opened. Release 12a. As a result, the rotating shaft 10a is released from the restraint of the stopper 12a and becomes free to rotate. 3 goes down. Therefore, the second screen 5 is sequentially folded from top to bottom.

Then, as shown in FIGS. 5 and 7A, when the second screen 5 is completely folded, only the first screen 2 is unfolded. After that, when the operation of the operation cord 14 is completed, the intermediate bar 3, which has fallen by its own weight, is placed on the bottom rail 6, and only the first screen 2 is kept unfolded.

On the other hand, when folding the first screen 2, the operation cord 14 is operated to rotate the rotating shaft 10a in the winding direction of the dimming cord 4 continuously by a predetermined amount or more. As a result, the light control drum 9a winds up the light control cord 4, and the intermediate bar 3 rises together with the other end of the light control cord 4. As shown in FIG. Therefore, the first screen 2 is sequentially folded from bottom to top.

Then, as shown in FIGS. 6 and 7B, when the first screen 2 is completely folded, only the second screen 5 is unfolded. After that, when the operation of the operation cord 14 is finished, the rotation of the rotating shaft 10a is restrained by the stopper, and only the second screen 5 is maintained in the unfolded state.

Next, a case where both the first screen 2 and the second screen 5 are folded will be described. When both the first screen 2 and the second screen 5 are unfolded, the light control cord 4 is in a tense state, so the interlocking mechanism is in a single state.

Therefore, first, when the operating cord 14 is operated to rotate only the rotary shaft 10b continuously by a predetermined amount or more in the winding direction of the lifting cord 7, the rotating shaft 10b rotates and the lifting drum 9b winds the lifting cord 7. , folds the second screen 5 .

After that, the operating cord 14 is continuously operated to wind the lifting cord 7 onto the lifting drum 9b. As a result, the fully folded second screen 5 abuts the intermediate bar 3 and the bottom rail 6 pushes the intermediate bar 3 up.

As a result, the weight of the intermediate bar 3 is not applied to the dimming cord 4, so that the cord 4 is loosened and the interlocking mechanism is in the interlocking state. Therefore, the rotating shaft 10a and the rotating shaft 10b rotate integrally, the lifting drum 9b winds up the lifting cord 7, and the dimming drum 9a winds up the dimming cord 4. As shown in FIG.

As a result, the bottom rail 6 and the intermediate bar 3 are raised integrally, and the first screen 2 is sequentially folded upward from below. Thus, the first screen 2 is also fully folded, as shown in FIG. 7C.

Thereafter, when the operation of the operation cord 14 is terminated, the rotation of the rotating shafts 10a and 10b is restrained by the stoppers 12a and 12b, respectively. Therefore, the folded state of the first screen 2 and the second screen 5 is maintained.

When unfolding the first screen 2 and the second screen 5, the operation cord 14 is operated to release the stopper 12b. As a result, the bottom rail 6 and the second screen 5, the intermediate bar 3 and the first screen 2 are lowered by their own weight, and the first screen 2 and the second screen 5 are deployed.

During such a lifting operation, the first insertion hole 25 and the second insertion hole 55 are arranged on the same straight line in the lifting direction (Y direction), so that the lifting cord 7 hangs in a straight line. The load on the lifting cord 7 can be reduced, the operating load can be reduced, and the durability can be improved.

[summary]
As described above, according to the present embodiment, the blind 100 improves the design by not exposing the lifting cord 4 and the first insertion hole 25 that pass through the first screen 2 to the screen surface side, and prevents light leakage. By forming the first insertion hole 25 and the second insertion hole 55 on the same straight line in the vertical direction and allowing the lifting cord 4 to hang down in a straight line, the intermediate bar 3 at the lower end of the first screen 2 and the second The bottom rail 6 at the lower end of the two screens 5 can be easily kept horizontal in the short direction thereof. Further, the lifting cord 4 is inserted straight 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 , thereby moving the first screen 2 upward. The amount of pleat opening (the pleat pitch in the Y direction) and the amount of opening of the cells of the second screen 5 (the cell pitch in the Y direction) can be substantially matched, and the design can be improved.

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

In the above-described 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-rear direction (Z direction). The center lines of the screen 5 in each front-rear direction (Z direction) did not match. However, the first screen 2 may have its center on the longitudinal centerline of the intermediate bar 3 . FIG. 8 is an enlarged right side cross-sectional view of the blind 100 of such a configuration near the intermediate bar 3. As shown in FIG.

As shown in the figure, the length in the front-rear direction (Z direction) when the first screen 2 is folded in this embodiment is designed to be longer (for example, 45 mm) than in the above-described embodiment. The width (the length in the Z direction) of the projecting portion 21 formed by joining the pleats is large.

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

On the other hand, the second screen 5 is the same as that of the above-described embodiment. C2 matches.

As a result, the centers of gravity of both the first screen 2 and the intermediate bar 3 coincide with each other at the center in the front-rear direction (Z direction), and the inclination of the intermediate bar 3 in the front-rear direction is suppressed.

In each of the above-described embodiments, the blind 100 was separated by the intermediate bar 3 into the first screen 2 and the second screen 5, but the intermediate bar 3 is not provided, and only a single pleated screen is provided. The present invention is applicable even in FIG. 9 is a right sectional view showing such a blind 100. As shown in FIG.

A blind 100 in the figure has a headbox 1 , a winding drum 9 and a pleated screen 2 . The pleated screen 2 is liftably supported by an elevating cord 7 having one end connected to the winding drum 9 and the other end connected to a bottom rail 6 .

The pleated screen 2 has protrusions 21 formed with insertion holes 25 at the vertex 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-rear direction (Z direction) of the pleated screen 2 and is inserted through the insertion hole 25 .

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

Even in such a single pleated screen 2, the width of the protrusions 21 can be changed as shown in FIG.

In the above-described embodiment, the projecting portion 21 is formed by stacking peak portions of a predetermined length from the apex portion 2a of the pleats and joining them by welding or the like. Alternatively, apart from the pleats, a plate-like projecting piece may be separately joined to the vertex portion 2a.

[Modified Example of First/Second Screen Combination]
In the above-described embodiment, the first screen 2 is the pleated screen and the second screen is the honeycomb screen, but the combination of the screens used as the first screen 2 and the second screen 5 is not limited to this.

10 to 13 show modifications of the combination. 10 to 13 are enlarged right sectional views of the vicinity of the intermediate bar 3 of the blind 100 according to the modification.

In this combination, both the first screen 2 and the second screen 5 are collapsible screens, and the first screen 2 can be raised and lowered by connecting the dimming cord 4 connected to the intermediate bar 3. The second screen 5 is connected to the first screen 2 by inserting an elevating cord 7 connected to the bottom rail 6 through the intermediate bar 3 and supported so as to be able to move up and down. In this case, the lifting cords 7 may be inserted through the first screen 2 and then through the intermediate bar 3, or may not be inserted through the first screen 2, for example, in the front-rear direction (Z direction) of the first screen 2. The intermediate bar 3 may be inserted with the rear side suspended.

At least one of the first screen 2 and the second screen 5 has an insertion hole 25 through which the protrusion 21 formed at the vertex 2a of each pleat on the back 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 bottom rail 6 in the front-rear direction (Z direction). The dimming cord 4 and the lifting cord 7 are arranged in the vicinity of the center line of the intermediate bar 3 and the bottom rail 6 in the longitudinal direction.

Further, the positions of the apexes 2a on the front side in the Z direction of the folded pleats of the screen in which the insertion holes 25 are formed and the ends on the front side in the Z direction of the intermediate bar 3 or the bottom rail 6 are approximately may match.

FIG. 10 shows an example in which both the first screen 2 and the second screen 5 employ pleated screens having insertion holes 25 through which the protrusions 21 according to the above-described embodiment are inserted.

Here, the material of the first screen 2 is formed of, for example, a see-through material that can transmit light. On the other hand, the material of the second screen 5 is formed of, for example, a material that does not transmit light and has a high light shielding property.

In this example, both the first screen 2 and the second screen 5 are offset forward of the longitudinal centerlines of the intermediate bar 3 and the bottom rail 6 (first screen stop plate 17 and second screen stop plate 18). are connected to the intermediate bar 3 on the front side in the Z direction), and the dimming cord 4 and the lifting cord 7 are arranged in the vicinity of the center line.

In FIG. 11, the first screen 2 is a pleated screen similar to the conventional one, which does not have the protrusion 21 and has an insertion hole 111 in the center, and the second screen 5 has the protrusion 21 and the insertion hole 25. An example in which a pleated screen is employed is shown.

In this example, a conventional pleated screen is used as the first screen 2, and it is connected near the center of the intermediate bar 3 in the front-rear direction. 17 has been modified accordingly.

FIG. 12 shows a honeycomb screen similar to that used as the second screen 5 in the above-described embodiment as the first screen 2, and as the second screen 5, pleats having the protrusions 21 and the insertion holes 25 described above. An example in which screens are employed is shown. That is, this example has a configuration in which the first screen 2 and the second screen 5 shown in the above embodiment are interchanged.

In FIG. 13, a pleated screen having the protrusions 21 and the insertion holes 25 is adopted as the first screen 2, and two pleated screens having the protrusions 21 and the insertion holes 25 are used as the second screen 5. , the projections 21 and the insertion holes 25 are overlapped with each other so as to be symmetrical with each other. Due to the structure of the second screen 5, the second screen stop plate 18 is also changed into a shape that can connect two pleated screens.

As shown in these four modifications, at least one of the first screen 2 and the second screen 5 is provided at a position offset in front of the center line in the front-rear direction, while the light control cord 4 and the lifting cord 7 are provided. By arranging the intermediate bar 3 and the bottom rail 6 near the center line, the intermediate bar 3 and the bottom rail 6 can be kept horizontal in the front-rear direction (Z direction), and the screens arranged above and below can be freely combined. can be done.

[Other Modifications]
In the above-described embodiment, the lifting cord 7 is suspended from directly below the substantially intermediate position in the Z direction of the two winding drums (the light control drum 9a and the lifting drum 9b) arranged side by side, and the protrusion 21 is first inserted. It was inserted through the hole 25 . However, the elevating cord 7 hangs down slightly behind the middle position of the two winding drums in the front-rear direction (Z direction), and the projecting portion 21 is positioned as described above so that the insertion hole 25 is positioned in the hanging direction. may be arranged slightly behind the embodiment of . In this case, the position of the front apex 2a of the pleat in the front-rear direction (Z-direction) is the same as in the above-described embodiment, so that the width of the pleat in the front-rear direction (Z-direction) is larger than in the above-described embodiment. That is, when the screen is unfolded, the pitch of each pleat is increased, the number of pleats is reduced, and the folding margin when the screen is folded can be reduced.

Furthermore, in the above-described embodiment and modifications, the blind 100 may employ a so-called cord-type elevating method in which a cord is used instead of a winding drum for elevating the screen.

1……Headbox 2……First screen 3……Intermediate bar 4……Dimming cord 5……Second screen 6……Bottom rail 7……Elevating cord 9……Volume Take-up drum 9a Light control drum 9b Elevating 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 (3)

a headbox that can be installed on a predetermined surface;
a dimming cord and an elevation cord hanging from the head box so as to be able to be raised and lowered;
a first screen, which is a collapsible screen, supported so as to be able to move up and down by inserting the dimming cord connected to the intermediate bar;
a second screen, which is a collapsible screen, connected to the first screen by inserting the elevating cord connected to the bottom rail through the intermediate bar, and supported so as to be able to move up and down;
and
One of the first screen and the second screen has a first insertion hole through which the projection formed at the vertex of each pleat on the back side is inserted, and the other screen has the screen. Having a second insertion hole for insertion,
The upper end or lower end of the screen in which the first 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-rear direction,
A center line of the first screen in the front-rear direction and a center line of the second screen in the front-rear direction do not coincide with each other. A blind according to claim 1,
The said 1st insertion hole and said 2nd insertion hole are arrange|positioned on the same straight line in the said raising/lowering direction. 3. A blind according to claim 1 or 2,
Of the first screen and the second screen, one of the screens is made of a non-translucent material, and the other screen is made of a translucent material.

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