JP7033382B2 - Pleated screen - Google Patents

Description

The present invention relates to a pleated screen in which a screen that can be bent in the vertical direction is suspended and supported from a head box, and the screen can be raised and lowered to adjust the amount of lighting.

The pleated screen suspends and supports a screen that can be bent in the vertical direction from a head box, and raises and lowers the screen by an operating device to appropriately adjust the amount of lighting.

Generally, in a pleated screen that suspends and supports one screen from the head box, this screen is used as drape fabric (light-shielding fabric) or lace fabric (light-collecting fabric), and the amount of lighting is adjusted by folding the screen. Can be done.

In addition, as a type of pleated screen, a screen that can be folded in a zigzag shape in the vertical direction is composed of an upper screen and a lower screen of different fabrics, and the lower edge of the upper screen and the upper edge of the lower screen are taken on the intermediate rail. Some of them are worn and the middle rail and bottom rail are suspended and supported by independent lifting cords.

In such a pleated screen having an upper screen and a lower screen, the upper screen is used as a daylighting material and the lower screen is used as a daylighting material, or conversely, the upper screen is used as a daylighting material and the lower screen is used as a daylighting material. Various combinations of fabrics can be separated by an intermediate rail. The amount of lighting can be adjusted by folding either or both of the upper screen and the lower screen, increasing the degree of freedom in adjusting the amount of lighting. Further, the number of intermediate rails is not limited to one, and a plurality of intermediate rails can be used as a combination of three or more screens.

By the way, regarding the upper elevating cord and the lower elevating cord for raising and lowering the upper screen and the lower screen, respectively, one insertion hole is provided in the upper screen, and the upper elevating cord and the lower elevating cord are provided for the one insertion hole. A pleated screen through which two screens are inserted is disclosed (see, for example, Patent Document 1).

Further, regarding the upper elevating cord and the lower elevating cord for raising and lowering the upper screen and the lower screen, respectively, two insertion holes are provided in parallel in the left-right direction on the upper screen, and the upper elevating and lowering cords are provided for each of the two insertion holes. A pleated screen through which a cord and a lower elevating cord are inserted is disclosed (see, for example, Patent Document 2).

Japanese Patent Application Laid-Open No. 2002-332785 Japanese Unexamined Patent Publication No. 2002-115474

As described above, in the technique of Patent Document 1, when constructing a pleated screen having an upper screen and a lower screen, one insertion hole is provided in the upper screen, and an upper elevating cord and a lower part are provided for the one insertion hole. Two side lift cords are inserted.

Further, in the technique of Patent Document 2, when a pleated screen having an upper screen and a lower screen is constructed, two insertion holes are provided in parallel in the left-right direction on the upper screen, and the upper side is provided with respect to each of the two insertion holes. The elevating cord and the lower elevating cord are inserted respectively.

However, these techniques increase the size and number of insertion holes in the upper screen, and thus have the problem of increasing light leakage from these insertion holes.

Therefore, in a pleated screen having an upper screen and a lower screen, a technique for suppressing light leakage generated from an insertion hole provided in the screen is desired. Similarly, in a pleated screen in which one or a plurality of screens are hung from a head box, a technique for suppressing light leakage generated from an insertion hole is desired.

In view of the above problems, the present invention is to provide a pleated screen capable of suppressing light leakage generated from an insertion hole provided in the screen.

The pleated screen of the present invention is a pleated screen, and is provided with an insertion hole for inserting one elevating cord into the bendable screen, and a gap when the elevating cord is inserted into the insertion hole is provided. The cord diameter of the elevating cord is smaller than the bending diameter of the annular support cord of the pitch holding cord for holding the screen at a predetermined pitch, and the cord diameter is an elliptical cross section having a minor axis and a major axis for holding the screen at a predetermined pitch. The diameter of the elevating cord is smaller than the major diameter of the pitch holding cord, and the diameter of the elevating cord is smaller than the minor diameter of the pitch holding cord. The 45 ° projected diameter of the insertion hole projected vertically or horizontally in is not more than twice the cord diameter of the elevating cord, and the conditions of the cord diameter of the elevating cord and the 45 ° projected diameter of the insertion hole are satisfied. As a result, light leakage in the insertion hole is suppressed , and the movement of the bendable screen is restricted in the vertical direction to reduce the movement deviation width of the screen when moving up and down.

Further, in the pleated screen of the present invention, the insertion hole is provided as a round hole-shaped insertion hole for inserting one elevating cord into the bendable screen, and the hole diameter of the insertion hole is used as a specified value. It is characterized in that it is set to 1.8 mm and the cord diameter of the elevating cord is set to 0.7 mm as a specified value.

Further, in the pleated screen of the present invention, the insertion hole is formed at a position offset from a substantially central portion in the front-rear direction of the screen.

Further, in the pleated screen of the present invention, the elevating cord is formed of a string-shaped cord when the insertion hole is formed of a round hole shape, and the insertion hole is formed of a long hole shape elongated in the front-rear direction. When the insertion hole is formed in a slit shape, it is made up of a string-shaped cord or a tape-shaped cord.

According to the present invention, the size of the insertion hole provided for inserting each elevating cord into the screen is set to an extremely small size so that there is no space for other cords or the like other than one elevating cord. It is possible to reduce the light leakage generated from the insertion hole. In particular, by reducing both the cross-sectional area of the elevating cord and the area of the insertion hole, the movement deviation width of the screen during elevating can be reduced, and the pleated screen as a whole can be maintained in a good-looking state.

It is a front view which shows the schematic structure of the pleated screen of 1st Embodiment by this invention. (A) and (b) are a front view and a side view which partially show the schematic structure of the pleated screen of 1st Embodiment by this invention, respectively. (A) and (b) are front views and side views which partially show the schematic configuration of the pleated screen of the comparative example based on the prior art, respectively, in comparison with the first embodiment according to the present invention. (A) and (b) are enlarged side views of the periphery of the screen (the support cord of the pitch holding cord and the cloth of the screen are in contact with each other) of the pleated screen of the first embodiment according to the present invention, respectively, and the conventional screen. It is an enlarged side view of the periphery of the screen (the support cord of the pitch holding cord and the cloth of the screen are in contact with each other) in the pleated screen of the comparative example based on the technique. (A) and (b) are enlarged side views of the periphery of the screen (the support cord of the pitch holding cord and the cloth of the screen are not in contact with each other) of the pleated screen of the first embodiment according to the present invention, respectively. It is an enlarged side view of the screen periphery (the support cord of a pitch holding cord and the cloth of a screen are in non-contact state) in the pleated screen of the comparative example based on the prior art. It is a front view which shows the schematic structure of the pleated screen of the 2nd Embodiment by this invention. (A) and (b) are a front view and a side view which partially show the schematic structure of the pleated screen of the 2nd Embodiment by this invention, respectively. (A) and (b) are a schematic enlarged side view around the screen of one embodiment of the pleated screen of the second embodiment according to the present invention, and a schematic enlarged side view around the screen of a further modified example, respectively. Is. (A) and (b) are front views and side views which partially show the schematic configuration of the pleated screen of the comparative example based on the prior art, respectively, in comparison with the second embodiment according to the present invention. (A) and (b) are enlarged side views around the upper screen of the pleated screen of the second embodiment according to the present invention (the support cord of the pitch holding cord and the fabric of the upper screen are in contact with each other). It is an enlarged side view of the periphery of the upper screen (the support cord of the pitch holding cord and the fabric of the upper screen are in contact with each other) in the pleated screen of the comparative example based on the prior art. (A) and (b) are enlarged side views of the periphery of the upper screen of the pleated screen of the second embodiment according to the present invention (the support cord of the pitch holding cord and the fabric of the upper screen are not in contact with each other). It is an enlarged side view of the periphery of the upper screen (the support cord of the pitch holding cord and the fabric of the upper screen are not in contact with each other) in the pleated screen of the comparative example based on the prior art. (A), (b), and (c) are the periphery of the upper screen of the modified example of the pleated screen of the second embodiment according to the present invention (the support cord of the pitch holding cord and the fabric of the upper screen are not in contact with each other). It is an enlarged side view. (A) and (b) are an enlarged side view of the periphery of the screen of one embodiment of the pleated screen of the third embodiment according to the present invention, and an enlarged side view of the periphery of the screen of the modified example thereof. (A) and (b) are an enlarged side view of the periphery of the screen of one embodiment of the pleated screen of the fourth embodiment according to the present invention, and an enlarged side view of the periphery of the screen of the modified example thereof. (A) and (b) are an enlarged side view of the periphery of the screen of one embodiment of the pleated screen of the fifth embodiment according to the present invention, and an enlarged side view of the periphery of the screen of the modified example thereof. (A) and (b) are a schematic enlarged side view around the screen of one embodiment of the pleated screen of the fifth embodiment according to the present invention, and a schematic enlarged side view around the screen of a further modified example, respectively. Is. It is an enlarged perspective view around the screen of the modification which is applicable to the pleated screen of 1st to 5th Embodiment by this invention. It is an enlarged perspective view around the screen of the further modification which is applicable to the pleated screen of 1st to 5th Embodiment by this invention. It is an enlarged perspective view around the screen of the further modification which is applicable to the pleated screen of 1st to 5th Embodiment by this invention.

Hereinafter, the pleated screen of each embodiment according to the present invention will be described with reference to the drawings. In the specification of the present application, with respect to the front view of the pleated screen shown in FIG. 1, the upper side and the lower side in the drawing are upward (or upper) and lower (or lower), respectively, according to the hanging direction of the screen. It will be defined and described by defining the left direction in the figure as the left side of the pleated screen and the right direction in the figure as the right side of the pleated screen. Further, the side on which the front view of FIG. 1 is visually recognized is the front side (indoor side), and the opposite side is the rear side (outdoor side).

[First Embodiment]
FIG. 1 is a front view showing a schematic configuration of a pleated screen according to the first embodiment of the present invention. In the pleated screen of the first embodiment, the upper edge portion of the screen 6 that can be bent in the vertical direction is suspended and supported from the head box 1, and the bottom rail 7 is attached to the lower edge portion of the screen 6, and the bottom rail is attached. 7 is supported by the elevating cord 8. The head box 1 is fixed to a mounting surface such as a ceiling surface via a bracket 2.

An operation code 9 is suspended and supported at one end of the head box 1. The operation code 9 is for pulling out a plurality of (two in this example) lifting cords 3 for raising and lowering the bottom rail 7 from the cord outlet 1a of the headbox 1 or pulling them into the headbox 1. be.

One end of each elevating cord 3 is connected to the operation cord 9 via a cord equalizer 8, and the other end of each elevating cord 3 passes through the inside of the head box 1 via a stopper device (not shown) provided in the head box 1. It is guided and turned downward via a support member 10 (see FIG. 2B) that supports the pulley 10a disposed in place in the headbox 1. Then, the other end of each of the elevating cords 3 turned downward penetrates the screen 6 by being inserted into the insertion hole 4 provided in the screen 6 and is connected to the bottom rail 7.

Therefore, if the operation code 9 is operated to pull out the elevating cord 3 from the head box 1, the bottom rail 7 is pulled up, and if the operation code 9 is released and the lock of the stopper device is activated, the head box 1 of the elevating cord 3 is activated. The bottom rail 7 can be suspended and supported at a desired position by preventing the bottom rail 7 from being pulled in.

Further, by operating the operation code 9, the elevating code 3 is slightly pulled out from the head box 1 to unlock the stopper device, and then the operation code 9 is released to pull the elevating code 3 into the head box 11. The bottom rail 7 can be lowered by the weight of the bottom rail 7.

The pitch holding cord 11 is hung from the head box 1 (see FIG. 2B) behind the elevating cord 3, that is, outside the room, and is attached to the bottom rail 7. An elevating cord 3 is inserted through a large number of annular support cords 11a provided at equal intervals on the pitch holding cord 11. Then, when the bottom rail 7 is lowered and the screen 6 is stretched, the screen 6 is supported by the support cord 11a so that the folds of the screen 6 are held at substantially equal intervals.

By the way, in the pleated screen of the first embodiment shown in FIG. 1, the size of the insertion hole 4 provided for inserting each elevating cord 3 into the screen 6 is set to a size other than one of each elevating cord 3. The size is so small that there is no space for such things. This is configured to reduce the light leakage generated from the insertion hole 4.

Further, in the pleated screen of the first embodiment, both the cross-sectional area of the elevating cord 3 and the area of the insertion hole 4 are made smaller than those of the conventional technique. As a result, the movement of the screen 6 during ascending / descending is preferably restricted in the vertical direction, the movement deviation width of the screen 6 during ascending / descending (for example, the displacement in the left-right direction) is reduced, and the pleated screen as a whole can be maintained in a good-looking state. I am doing it.

More specifically, with reference to FIGS. 2 to 5, the configuration around the screen of the pleated screen of the first embodiment will be described in comparison with the comparative example. 2 (a) and 2 (b) are a front view and a side view partially showing the schematic configuration of the pleated screen of the first embodiment according to the present invention, respectively. On the other hand, FIGS. 3A and 3B show comparative examples based on the prior art for comparison with the first embodiment of the present invention. 4 and 5 show enlarged side views around the screen comparing the configuration of the first embodiment according to the present invention and the configuration of the comparative example, respectively.

First, as shown in FIG. 2A, in the pleated screen of the first embodiment according to the present invention, when the bendable screen 6 is stretched, the screen 6 is tilted at approximately 45 ° from the horizontal, and the insertion hole 4 is formed. Looking at the screen 6 having a round hole having a hole diameter D (inside the broken line in the figure), the elevating code 3 having a code diameter (cross-sectional diameter) d having a round cross section has a minor axis d1 (= code). It has an elliptical cross section with a diameter d) and a major axis d2 (≈d × √2). The gap between the elevating cord 3 and the insertion hole 4 causes light leakage, but in the pleated screen of the first embodiment according to the present invention, the gap is smaller than that of the prior art. This is configured to reduce the light leakage generated from the insertion hole 4. Further, in the pleated screen of the first embodiment according to the present invention, as shown in FIG. 2B, an elevating cord 3 having a cord diameter (cross-sectional diameter) d is provided at a substantially central portion of the width in the front-rear direction of the screen 6. By being inserted through each of the insertion holes 4, the elevating cord 3 is penetrated through the screen 6.

On the other hand, as shown in FIG. 3A, in the pleated screen of the comparative example based on the prior art, the screen 6 is tilted at approximately 45 ° from the horizontal when the similarly bendable screen 6 is stretched, and the insertion hole 4 is formed. Looking at the screen 6 having a round hole having a hole diameter D'(inside the broken line in the figure), the elevating cord 3 having a cord diameter (cross-sectional diameter) d'having a round cross section has a minor diameter d1'. (= Code diameter d') and major axis d2'(≈d' × √2) form an elliptical cross section. The gap between the elevating cord 3 and the insertion hole 4 causes light leakage, but in the comparative example based on this conventional technique, compared with the pleated screen of the first embodiment according to the present invention shown in FIG. , It can be seen that the gap is large. Further, also in the comparative example shown in FIG. 3A, the elevating cord 3 having the cord diameter (cross-sectional diameter) d'is inserted through the insertion holes 4 provided in the substantially central portion of the width in the front-rear direction of the screen 6. By doing so, the elevating cord 3 is penetrated through the screen 6.

By the way, in the pleated screen using the pitch holding code 11, there are two states, a contact state in which the support cord 11a of the pitch holding code 11 and the cloth of the screen 6 are in contact with each other, and a non-contact state in which the cloth is not in contact with each other. Therefore, FIG. 4 shows the configuration of the first embodiment according to the present invention when the support cord 11a of the pitch holding cord 11 is in contact with the screen 6 at the position of the outdoor crease (“contact point” in the figure). , An enlarged side view around the screen is shown in comparison with the configuration of the comparative example. Further, in FIG. 5, the configuration of the first embodiment according to the present invention when the support cord 11a of the pitch holding cord 11 is in a non-contact state where the support cord 11a of the pitch holding cord 11 is not in contact at the position of the outdoor crease of the screen 6, and a comparative example thereof. An enlarged side view around the screen is shown in comparison with the configuration.

At this time, in the configuration according to the present invention, the elevating cord 3 having the cord diameter (cross-sectional diameter) d (equal to the short diameter d1 in the surface view of the fabric shown in FIG. 2A) is inserted into the insertion hole 4 having the hole diameter D. As shown in 4 (a) and FIG. 5 (a), the insertion hole 4 is in contact with the support cord 11a of the pitch holding cord 11 and the fabric (fabric thickness sd) of the screen 6. The tip of an annular support cord 11a (round cross-sectional diameter kd) provided in large numbers at equal intervals on the pitch holding cord 11 having a minor diameter pd1 × a major diameter pd2 as a cord cross section with a gap in the front-rear direction between the lifting cord 3 and the elevating cord 3. It is assumed that it is smaller than the bending diameter bd of the (bending portion). Further, the hole diameter D of the insertion hole 4 according to the present invention is smaller than the major axis pd2 as the code cross section of the pitch holding code 11. Further, the gap in the front-rear direction between the insertion hole 4 and the elevating cord 3 is made smaller than twice the short diameter pd1 as the cord cross section of the pitch holding cord 11 which is bendable. Further, the cord diameter d of the elevating cord 3 according to the present invention is reduced in diameter with respect to both the minor diameter pd1 and the major diameter pd2 as the cord cross section of the pitch holding cord 11. In addition, the effect of suppressing light leakage may be compared in a state where the screen 6 is tilted at approximately 45 ° from the horizontal, and the hole diameter D of the insertion hole 4 according to the present invention is shown in FIGS. 4A and 4A. As shown in 5 (a), the diameter (45 ° projected diameter Da) projected in the vertical direction or the horizontal direction when tilted 45 ° from the horizontal is set to be twice or less the code diameter d of the elevating cord 3.

That is, with such a configuration, the light leakage generated from the insertion hole 4 through which the elevating cord 3 is inserted is suppressed.

(Example)
As a more specific preferable value, the cord diameter d of the elevating cord 3 is φ0.7 mm, and the hole diameter D of the insertion hole 4 is φ1.8 mm. The minor axis pd1 and the major axis pd2 as the code cross section of the pitch holding code 11 are each conventionally used 0.8 × 2.0 mm, and the code diameter (cross section diameter) kd of the annular support cord 11a having a round cross section is The diameter is 0.2 mm, and the bending diameter bd of the tip (bending portion) of the support cord 11a is approximately 1.5 mm in the contact state and approximately 3 mm in the non-contact state. The fabric thickness sd of the screen 6 is approximately 0.2 mm, which has been conventionally used.

According to this embodiment, in a state where the elevating cord 3 having a cord diameter d of φ0.7 mm is inserted into the hole diameter D (φ1.8 mm) of the insertion hole 4, it is shown in the fabric surface view shown in FIG. 2 (a). As described above, the gap between the insertion hole 4 and the elevating cord 3 is approximately 0.81 mm (= D (1.8 mm) -d2 (0.7 × √2)) to 1.10 mm (= D) in the front-rear direction. (1.8 mm) -d1 (0.7)), and the bending diameter bd of the tip (bending portion) of the annular support cord 11a extending behind it is approximately 1.5 mm when in the above contact state. It is smaller than any of approximately 3 mm in the non-contact state. Therefore, while suppressing the light leakage generated from the insertion hole 4, the support cord 11a cannot enter the insertion hole 4 under any circumstances (it does not get caught), that is, the screen 6 is folded or stretched to move up and down. There is no hindrance to the movement when doing.

Further, the hole diameter D (φ1.8 mm) of the insertion hole 4 is smaller than the major axis pd2 (2.0 mm) as the code cross section of the pitch holding cord 11. Then, in a state where the elevating cord 3 having a cord diameter d of φ0.7 mm is inserted into the hole diameter D (φ1.8 mm) of the insertion hole 4, the gap between the insertion hole 4 and the elevating cord 3 is as described above. In addition, it is about 0.81 mm to 1.10 mm in the front-rear direction, which is smaller than twice the short diameter pd1 (0.8 mm) as the code cross section of the pitch holding cord 11 that can be bent. Therefore, while suppressing the light leakage generated from the insertion hole 4, the bendable pitch holding cord 11 cannot enter the insertion hole 4 under any circumstances (it does not get caught), that is, the screen 6 is folded. Or, by stretching it, the movement when going up and down is not hindered at all.

As described above, the insertion hole 4 is formed in such a size that a cord other than the elevating cord 3 to be inserted (in this example, the pitch holding cord 11 and its support cord 11a) cannot enter.

Further, the hole diameter D (φ1.8 mm) of the insertion hole 4 is larger than the cord diameter d of the elevating cord 3, but the 45 ° projected diameter Da (1.8 / √2 ≈ 1.27 mm) of the insertion hole 4 is elevated. Since the cord diameter d (φ0.7 mm) of the cord 3 is set to be twice or less, the smaller the cord diameter d of the elevating cord 3, the smaller the cord diameter d. In other words, the cord diameter d of the elevating cord 3 according to the present invention can be reduced in diameter with respect to both the minor diameter pd1 and the major diameter pd2 as the cord cross section of the pitch holding cord 11. In this way, since the light leakage generated from the insertion hole 4 is suppressed and the insertability of the elevating cord 3 into the insertion hole 4 is maintained, both the cross-sectional area of the elevating cord 3 and the area of the insertion hole 4 are conventionally controlled. It's smaller than the technique. As a result, the movement of the screen 6 during ascending / descending is preferably restricted in the vertical direction, the movement deviation width of the screen 6 during ascending / descending (for example, the displacement in the left-right direction) is reduced, and the pleated screen as a whole can be maintained in a good-looking state. ..

(Comparative example)
On the other hand, as shown in FIGS. 4 (b) and 5 (b), in the configuration according to the comparative example, the code diameter d'of the elevating cord 3 (the short diameter d1'of the fabric surface shown in FIG. 3 (a) is used. (Equal) is set to φ1.2 mm, and the hole diameter D'of the insertion hole 4 is set to φ3.5 mm. The minor axis pd1 and the major axis pd2 as the code cross section of the pitch holding code 11 are each 0.8 × 2.0 mm, and the code diameter (cross section diameter) cd of the annular support cord 11a having a round cross section is φ0.2 mm. The bending diameter bd of the tip (bending portion) of the support cord 11a is approximately 1.5 mm in the contact state and approximately 3 mm in the non-contact state. The fabric thickness sd of the screen 6 is approximately 0.2 mm.

Therefore, in a state where the elevating cord 3 having a cord diameter d of φ1.2 mm is inserted into the hole diameter D'(φ3.5 mm) of the insertion hole 4 according to the comparative example, it is shown in the fabric surface view shown in FIG. 3 (a). As described above, the gap between the insertion hole 4 and the elevating cord 3 is approximately 1.80 mm (= D'(3.5 mm) -d2'(1.2 x √2)) to 2.30 mm (= D'(3.5 mm) -d2' (1.2 x √2)) in the front-rear direction. = D'(3.5 mm) -d1'(1.2)), which is abbreviated as the bending diameter bd of the tip (bending portion) of the annular support cord 11a extending behind it in the above contact state. It is larger than 1.5 mm. Therefore, the light leakage generated from the insertion hole 4 becomes large, and the support cord 11a can enter the insertion hole 4 (may be caught), that is, the operation when the screen 6 is folded or stretched to move up and down. It may interfere.

Further, the hole diameter D'(φ3.5 mm) of the insertion hole 4 according to the comparative example is larger than the major axis pd2 (2.0 mm) as the code cross section of the pitch holding code 11. Then, in a state where the elevating cord 3 having a cord diameter d of φ1.2 mm is inserted into the hole diameter D'(φ3.5 mm) of the insertion hole 4, the gap between the insertion hole 4 and the elevating cord 3 is described above. As described above, the diameter is approximately 1.80 mm to 2.30 mm in the front-rear direction, which is larger than twice the short diameter pd1 (0.8 mm) as the code cross section of the pitch holding cord 11 that can be bent. .. Therefore, the light leakage generated from the insertion hole 4 becomes large, and the bendable pitch holding cord 11 can enter the insertion hole 4 (may be caught), that is, by folding or stretching the screen 6. It may interfere with the movement when going up and down.

Further, as shown in FIGS. 4 (b) and 5 (b), the hole diameter D'(φ3.5 mm) of the insertion hole 4 according to the comparative example is the 45 ° projected diameter Da'(3. Since 5 / √2≈2.47 mm) is larger than twice the cord diameter d'(φ1.2 mm) of the elevating cord 3, light leakage generated from the insertion hole 4 becomes large, and the cross-sectional area of the elevating cord 3 becomes large. Both the area of the insertion hole 4 and the area of the insertion hole 4 are larger than those of the embodiment of the present invention, and the movement deviation width (for example, the deviation in the left-right direction) of the screen 6 during ascending / descending is relatively large.

As described above, in the pleated screen of the first embodiment shown in FIG. 1, the size of the insertion hole 4 provided for inserting each elevating cord 3 into the screen 6 is set to a size other than one of each elevating cord 3. Since the size is so small that there is no space for other cords and the like, the elevating performance is not impaired, but rather improved, and the light leakage generated from the insertion hole 4 can be reduced.

Further, in the pleated screen of the first embodiment, both the cross-sectional area of the elevating cord 3 and the area of the insertion hole 4 are smaller than those of the conventional technique, so that the movement of the screen 6 during elevating is preferably restricted in the vertical direction. As a result, the movement deviation width (for example, the deviation in the left-right direction) of the screen 6 at the time of raising and lowering becomes small, and the pleated screen as a whole can maintain a good-looking state.

[Second Embodiment]
Next, the pleated screen of the second embodiment having the upper screen 6U and the lower screen 6L will be described with reference to FIGS. 6 and 7. FIG. 6 is a front view showing a schematic configuration of a pleated screen according to a second embodiment of the present invention. 7 (a) and 7 (b) are a front view and a side view partially showing the schematic configuration of the pleated screen of the second embodiment according to the present invention, respectively. The same reference numbers are assigned to the same components as those in the first embodiment.

In the pleated screen of the second embodiment, an upper screen 6U that can be bent in a zigzag shape is suspended and supported from the head box 1, and the lower end of the screen 6U is attached to the upper surface of the intermediate rail 5.

The upper end of the lower screen 6L, which is also bendable in a zigzag shape, is attached to the lower surface of the intermediate rail 5, and the lower end of the lower screen 6L is attached to the bottom rail 7.

The first and second operation codes 9L and 9U are suspended and supported at both ends of the head box 1, respectively. The first operation code 9L pulls out a plurality of (two in this example) lower lifting cords 3L for raising and lowering the bottom rail 7 from the code outlet 1a of the headbox 1 or pulls them into the headbox 1. It is an operation. The second operation code 9U is an operation of pulling out a plurality of (two in this example) upper lifting cords 3U for raising and lowering the intermediate rail 5 from the code outlet 1b of the headbox 1 or pulling them into the headbox 1. Is to do.

One end of each lower elevating cord 3L is connected to the first operation cord 9L via a cord equalizer 8L, and the other end of each lower elevating cord 3L is a stopper device (not shown) provided in the head box 1. It is guided through the headbox 1 and turned downward via a support member 10 (see FIG. 7B) that supports the pulley 10a disposed in place in the headbox 1. Then, the other end of each lower elevating cord 3L turned downward is detoured from the head box 1 so as to pass through the back surface of the intermediate rail 5 without being inserted into the insertion hole 4U provided in the upper screen 6U. The back surface of the upper screen 6U is hung down and inserted into the insertion hole 4L provided in the lower screen 6L to penetrate the lower screen 6L and be connected to the bottom rail 7.

Therefore, if the lower elevating cord 3L is pulled out from the head box 1 by operating the first operation code 9L, the bottom rail 7 is pulled up, the first operation code 9L is released, and the lock of the stopper device is activated. For example, the bottom rail 7 can be suspended and supported at a desired position by preventing the lower elevating cord 3L from being pulled into the head box 1.

Further, by operating the first operation code 9L, the lower elevating code 3L is slightly pulled out from the head box 1 to unlock the stopper device, and then the first operation code 9L is released to lower the lower side. The elevating cord 3L can be pulled into the head box 1 and the bottom rail 7 can be lowered by the weight of the bottom rail 7.

One end of each upper elevating cord 3U is connected to the second operation cord 9U via a cord equalizer 8U, and the other end of each upper elevating cord 3U is connected to a stopper device (not shown) provided in the head box 1. It is guided in the headbox 1 and turned downward via a support member that supports a pulley disposed in place in the headbox 1. The other end of each downward elevating cord 3U is inserted into the insertion hole 4U provided in the upper screen 6U, penetrates the upper screen 6U, and is connected to the intermediate rail 5.

Therefore, if the upper elevating cord 3U is pulled out from the head box 1 by operating the second operation code 9U, the intermediate rail 5 is pulled up, and the second operation code 9U is released to activate the lock of the stopper device. The intermediate rail 5 can be suspended and supported at a desired position by preventing the upper elevating cord 3U from being pulled into the head box 1.

Further, by operating the second operation code 9U, the upper elevating code 3U is slightly pulled out from the head box 1 to unlock the stopper device, and then the second operation code 9U is released to release the upper elevating code. The 3U can be pulled into the head box 1 and the intermediate rail 5 can be lowered by the weight of the intermediate rail 5.

In the pleated screen of the second embodiment configured in this way, the intermediate rail 5 is pulled up to just below the head box 1, and the upper screen 6U is folded between the head box 1 and the intermediate rail 5 and the bottom rail is folded. When 7 is lowered, the lower screen 6L is suspended and supported from the head box 1.

Further, when the intermediate rail 5 is lowered to the top of the bottom rail 7 with the bottom rail 7 lowered to the lower limit, the lower screen 6L is folded between the intermediate rail 5 and the bottom rail 7, and is intermediate between the head box 1 and the head box 1. The upper screen 6U is suspended and supported from the rail 5. Therefore, for example, if the upper screen 6U is used as a daylighting material and the lower screen 6L is used as a light-shielding material, the degree of freedom in adjusting the amount of daylighting can be increased.

Then, if the bottom rail 7 is lowered to the lower limit and the intermediate rail 5 is positioned between the head box 1 and the bottom rail 7, the soft light transmitted through the upper screen 6U made of the daylighting material can be collected. can.

Further, when the bottom rail 7 is pulled up to the upper limit and opened, the bottom rail 7 is pulled up by operating the first operation code 9L without pulling up the intermediate rail 5, and the space between the headbox 1 and the bottom rail 7 is reached. The upper screen 6U and the lower screen 6L can be folded.

As shown in FIG. 7B, the pitch holding cord 11 is hung from the head box 1 and attached to the intermediate rail 5 behind the upper elevating cord 3U, that is, on the outdoor side, and the pitch is from the intermediate rail 5. The holding cord 12 is hung down and attached to the bottom rail 7.

An upper elevating cord 3U and a lower elevating cord 3L are inserted into the annular support cords 11a and 12a provided in large numbers at equal intervals in each of the pitch holding cords 11 and 12, respectively. Then, when the intermediate rail 5 is lowered to extend the upper screen 6U, the upper screen 6U is supported by the support cord 11a, and the folds of the upper screen 6U are held at substantially equal intervals. Similarly, when the bottom rail 7 is lowered to extend the lower screen 6L, the lower screen 6L is supported by the support cord 12a and the folds of the lower screen 6L are held at substantially equal intervals.

By the way, in the pleated screen of the second embodiment shown in FIG. 6, as shown in FIG. 7B, the lower elevating cord 3L is not inserted into the insertion hole 4U provided in the upper screen 6U, and the upper portion thereof is not inserted. The back surface of the screen 6U is hung down and inserted into the insertion hole 4L provided in the lower screen 6L so as to penetrate the lower screen 6L and connected to the bottom rail 7.

That is, as shown in FIGS. 7A and 7B, the upper screen 6U is provided with only an insertion hole 4U for inserting the upper elevating cord 3U whose end is connected to the intermediate rail 5. .. As a result, in the upper screen 6U, light leakage is suppressed by eliminating the need for arrangement of an insertion hole for inserting the lower elevating cord 3L, and further, as can be understood from the front view shown in FIG. 7A. The upper elevating cord 3U and the lower elevating cord 3L are arranged so as to be one straight line to enhance the aesthetic appearance.

In the example of the present embodiment, as shown in FIG. 8A, the lower elevating cord 3L hangs the back surface of the upper screen 6U without being inserted into the insertion hole 4U provided in the upper screen 6U. However, as shown in FIG. 8B, the front surface of the upper screen 6U is hung down without being inserted into the insertion hole 4U provided in the upper screen 6U, and the upper elevating cord 3U is viewed from the front. And the lower elevating cord 3L can be arranged so as to be one straight line to enhance the aesthetic appearance.

Further, in the pleated screen of the second embodiment shown in FIG. 6, as shown in FIG. 7A, the upper elevating cord 3U and the lower elevating cord 3L are inserted into each of the upper screen 6U and the lower screen 6L, respectively. The size of the insertion holes 4U and 4L provided for this purpose is set to a minimum size so that there is no space for other cords or the like other than one for each of the upper elevating cord 3U and the lower elevating cord 3L. This is configured to reduce the light leakage generated from the insertion holes 4U and 4L.

Further, in the pleated screen of the second embodiment, both the cross-sectional area of each of the upper elevating cord 3U and the lower elevating cord 3L and the respective areas of the insertion holes 4U and 4L are made smaller than those of the conventional technique. As a result, the movement of the upper screen 6U and the lower screen 6L when ascending and descending is preferably restricted in the vertical direction, and the movement deviation width (for example, the deviation in the left-right direction) of the upper screen 6U and the lower screen 6L when ascending and descending becomes small, and the pleats. We are trying to keep the screen looking good as a whole.

More specifically, with reference to FIGS. 7, 9 to 11, the configuration around the screen of the pleated screen of the second embodiment will be described in comparison with the comparative example. The configuration around the screen of the pleated screen of the second embodiment is as shown in FIG. 7 described above, while FIGS. 9 (a) and 9 (b) are for comparison with the second embodiment of the present invention. A comparative example based on the prior art is shown. 10 and 11 show enlarged side views around the upper screen in which the configuration of the second embodiment according to the present invention and the configuration of the comparative example are compared with each other.

First, referring to FIG. 7A, in the pleated screen of the second embodiment according to the present invention, the upper screen 6U (lower screen 6L) is stretched when the bendable upper screen 6U (similar to the lower screen 6L) is stretched. (Same as above) is tilted at approximately 45 ° from the horizontal, and when the upper screen 6U having the size of the insertion hole 4U composed of a round hole with a hole diameter D is viewed from the cloth surface (inside the broken line in the figure), the size of the insertion hole 4L is also the same. Looking at the lower screen 6L composed of round holes having a hole diameter D (inside the broken line in the figure), the elevating cord 3 having a cord diameter (cross-sectional diameter) d having a round cross section has a minor diameter d1 (= cord diameter). It has an elliptical cross section with d) and a major axis d2 (≈d × √2). The gap between the upper elevating cord 3U and the insertion hole 4U or the gap between the lower elevating cord 3L and the insertion hole 4L causes light leakage, but the pleated screen of the second embodiment according to the present invention. Then, the gap is smaller than that of the conventional technique. This is configured to reduce the light leakage generated from the insertion holes 4U and 4L. Further, in the pleated screen of the second embodiment according to the present invention, the upper screen 6U and the lower screen 6L pass through the insertion holes 4U and 4L provided in the substantially central portion of the width in the front-rear direction, respectively, as shown in FIG. 7B. As shown, only the upper elevating cord 3U is penetrated through the upper screen 6U, and only the lower elevating cord 3L is penetrated through the lower screen 6L. In this example, the upper elevating cord 3U and the lower elevating cord 3L hang down substantially at the center of the width in the front-rear direction (width 2 × a in the figure) of the intermediate rail 5.

On the other hand, as shown in FIG. 9A, in the pleated screen of the comparative example based on the prior art, the upper screen 6U (lower screen 6L) in the stretched state of the similarly bendable upper screen 6U (similar to the lower screen 6L). (Same as above) is tilted at approximately 45 ° from the horizontal, and the insertion hole 4U for inserting the upper elevating cord 3U and the lower elevating cord 3L of the cord diameter (cross-sectional diameter) d'so as to be magnified as a fabric surface view. The size of the insertion hole 4L for inserting the lower elevating cord 3L of the cord diameter (cross-sectional diameter) d'is composed of the round hole of the hole diameter D'. There is. Here, when the upper screen 6U and the lower screen 6L having the insertion holes 4U and 4L having the respective hole diameters D ″ and D ′ are viewed from the cloth surface (inside the broken line circle in the figure), the cord diameter having a round cross section (cross section). The elevating cord 3 having a diameter) d'has an elliptical cross section having a minor diameter d1'(= cord diameter d') and a major diameter d2'(≈ d'× √2). The gap between the elevating cord 3 and the insertion hole 4 causes light leakage, but in the comparative example based on this conventional technique, compared with the pleated screen of the second embodiment according to the present invention shown in FIG. , It can be seen that the gap is large. In the comparative example based on this conventional technique, as shown in FIG. 9B, the upper screen 6U is above the upper screen 6U via the insertion holes 4U provided in the substantially central portion of the width in the front-rear direction. Both the elevating cord 3U and the lower elevating cord 3L are penetrated, and only the lower elevating cord 3L is penetrated through the lower screen 6L. In this example, the upper elevating cord 3U and the lower elevating cord 3L hang down substantially at the center of the width in the front-rear direction (width 2 × a in the figure) of the intermediate rail 5. Therefore, a gangway 5a through which the lower elevating cord 3L is passed is formed at substantially the center of the width in the front-rear direction (width 2 × a in the figure) of the intermediate rail 5.

By the way, in the pleated screen using the pitch holding cords 11 and 12, there are two states, a contact state in which the support cord 11a of the pitch holding cord 11 and the fabric of the upper screen 6U are in contact with each other, and a non-contact state in which the fabric is not in contact. There are two states, a contact state in which the support cord 12a of the holding cord 12 and the fabric of the upper screen 6L are in contact with each other, and a non-contact state in which the fabric is not in contact with each other. Hereinafter, the upper screen 6U will be described as a representative. In FIG. 10, the configuration of the second embodiment according to the present invention when the support cord 11a of the pitch holding cord 11 is in contact with each other at the position of the outdoor crease (“contact point” in the figure) of the upper screen 6U, and the configuration thereof. An enlarged side view around the upper screen 6U is shown in comparison with the configuration of the comparative example. Further, in FIG. 11, the configuration of the second embodiment according to the present invention when the support cord 11a of the pitch holding cord 11 is in a non-contact state where the support cord 11a of the pitch holding cord 11 is not in contact at the position of the outdoor crease of the upper screen 6U, and a comparative example thereof. An enlarged side view of the periphery of the upper screen 6U is shown in comparison with the configuration of.

At this time, in the configuration of the second embodiment according to the present invention, as shown in FIGS. 10 (a) and 11 (a), the upper elevating cord 3U having a cord diameter (cross-sectional diameter) d with respect to the upper screen 6U. Only the insertion hole is inserted into the insertion hole 4U having the hole diameter D, and the insertion hole is in contact with the support cord 11a of the pitch holding cord 11 and the fabric (fabric thickness sd) of the upper screen 6U. An annular support cord 11a (round cross-sectional diameter cd) provided in large numbers at equal intervals on the pitch holding cord 11 having a minor diameter pd1 × a major diameter pd2 as a cord cross section with a front-rear gap between the 4U and the upper elevating cord 3U. It is assumed that the bending diameter dd of the tip (bending portion) of the above is smaller than that of bd. Similarly, for the lower screen 6L, the insertion hole 4L and the upper elevating cord are used regardless of whether or not the support cord 12a of the pitch holding cord 12 and the fabric (fabric thickness sd) of the lower screen 6L are in contact with each other. The tip (bent portion) of the annular support cord 12a (round cross-sectional diameter kd) provided in large numbers at equal intervals on the pitch holding cord 12 having a minor diameter pd1 × major diameter pd2 as a cord cross section with a gap in the front-rear direction between the cord and the 3L. ) Is smaller than the bending diameter bd.

Further, the hole diameter D of the insertion hole 4U according to the present invention is smaller than the major axis pd2 as the code cross section of the pitch holding code 11. Similarly, the hole diameter D of the insertion hole 4L according to the present invention is smaller than the major axis pd2 as the code cross section of the pitch holding code 12. Further, the gap in the front-rear direction between the insertion hole 4U and the upper elevating cord 3U is made smaller than twice the short diameter pd1 as the cord cross section of the pitch holding cord 11 which can be bent. Similarly, the gap in the front-rear direction between the insertion hole 4L and the lower elevating cord 3L is made smaller than twice the short diameter pd1 as the cord cross section of the pitch holding cord 12 that can be bent. Further, the cord diameter d of the upper elevating cord 3U according to the present invention is reduced in diameter with respect to both the minor diameter pd1 and the major diameter pd2 as the cord cross section of the pitch holding cord 11. Similarly, the cord diameter d of the lower elevating cord 3L according to the present invention is reduced in diameter with respect to both the minor diameter pd1 and the major diameter pd2 as the cord cross section of the pitch holding cord 12. In addition, the effect of suppressing light leakage may be compared in a state where the screen 6 is tilted at approximately 45 ° from the horizontal, and the hole diameters D of the insertion holes 4U and 4L according to the present invention are the upper and lower screens 6U and 6L. As shown in FIGS. 10 (a) and 11 (a), the diameter (45 ° projected diameter Da) projected in the vertical or horizontal direction when tilted 45 ° from the horizontal is applied to the upper and lower elevating cords 3U and 3L, respectively. It is set to be less than twice the cord diameter d.

In the configuration of the second embodiment according to the present invention, the same applies to the lower screen 6L in which only the upper elevating cord 3L having the cord diameter (cross-sectional diameter) d is inserted into the insertion hole 4L having the hole diameter D.

That is, with such a configuration, the light leakage generated from the insertion hole 4U through which the upper elevating cord 3U is inserted and the light leakage generated from the insertion hole 4L through which the lower elevating cord 3L is inserted are suppressed.

(Example)
As a more specific preferable value in the example of the upper screen 6U shown in FIGS. 10 (a) and 11 (a) as a representative, the cord diameter d of the upper elevating cord 3U is set to φ0.7 mm, and the hole diameter D of the insertion hole 4U is set. Is φ1.8 mm. The minor axis pd1 and the major axis pd2 as the code cross section of the pitch holding code 11 are each conventionally used 0.8 × 2.0 mm, and the code diameter (cross section diameter) kd of the annular support cord 11a having a round cross section is The diameter is 0.2 mm, and the bending diameter bd of the tip (bending portion) of the support cord 11a is approximately 1.5 mm in the contact state and approximately 3 mm in the non-contact state. The fabric thickness sd of the screen 6 is approximately 0.2 mm, which has been conventionally used.

Similarly, for the lower screen 6L, the cord diameter d of the lower elevating cord 3L can be set to φ0.7 mm, and the hole diameter D of the insertion hole 4L can be set to φ1.8 mm, which is short as the code cross section of the pitch holding cord 11. The diameter pd1 × major diameter pd2 is 0.8 × 2.0 mm, which is conventionally used, and the cord diameter (cross-sectional diameter) cd of the annular support cord 11a having a round cross section is φ0.2 mm. The bending diameter bd of the tip (bent portion) is approximately 1.5 mm in the contact state and approximately 3 mm in the non-contact state. The fabric thickness sd of the screen 6 is approximately 0.2 mm, which has been conventionally used.

According to this embodiment, in a state where the upper elevating cord 3U having a cord diameter d of φ0.7 mm is inserted into the hole diameter D (φ1.8 mm) of the insertion hole 4U, the fabric surface view shown in FIG. 7A is obtained. As shown, the gap between the insertion hole 4U and the upper elevating cord 3U is approximately 0.81 mm (= D (1.8 mm) -d2 (0.7 × √2)) to 1.10 mm in the front-rear direction. = D (1.8 mm) -d1 (0.7)), and is approximately 1. It is smaller than 5 mm and approximately 3 mm when in a non-contact state. Therefore, while suppressing the light leakage generated from the insertion hole 4U, the support cord 11a cannot enter the insertion hole 4U under any circumstances (it does not get caught), that is, by folding or extending the upper screen 6U. There is no hindrance to the movement when going up and down.

Further, the hole diameter D (φ1.8 mm) of the insertion hole 4U is smaller than the major axis pd2 (2.0 mm) as the code cross section of the pitch holding cord 11. When the upper elevating cord 3U having a cord diameter d of φ0.7 mm is inserted into the hole diameter D (φ1.8 mm) of the insertion hole 4U, the gap between the insertion hole 4U and the upper elevating cord 3U is described above. As described above, the diameter is approximately 0.81 mm to 1.10 mm in the front-rear direction, which is smaller than twice the minor diameter pd1 (0.8 mm) as the cord cross section of the pitch holding cord 11 that can be bent. There is. Therefore, while suppressing the light leakage generated from the insertion hole 4U, the bendable pitch holding cord 11 cannot enter the insertion hole 4U under any circumstances (it does not get caught), that is, the upper screen 6U is used. By folding or stretching it, the movement when going up and down is not hindered at all.

As described above, the insertion hole 4U is formed in such a size that a cord other than the upper elevating cord 3U to be inserted (in this example, the pitch holding cord 11 and its support cord 11a) cannot enter. Similarly, the insertion hole 4L is formed in a size such that a cord other than the lower elevating cord 3L to be inserted (in this example, the pitch holding cord 12 and its support cord 12a) cannot enter.

Further, the hole diameter D (φ1.8 mm) of the insertion hole 4U is larger than the code diameter d of the upper elevating cord 3U, but the 45 ° projected diameter Da (1.8 / √2≈1.27 mm) of the insertion hole 4U is larger. Since the cord diameter d (φ0.7 mm) of the upper elevating cord 3U is set to be twice or less, the smaller the cord diameter d of the upper elevating cord 3U, the smaller the cord diameter d. In other words, the cord diameter d of the upper elevating cord 3U according to the present invention can be reduced in diameter with respect to both the minor diameter pd1 and the major diameter pd2 as the cord cross section of the pitch holding cord 11. In this way, since the light leakage generated from the insertion hole 4U is suppressed and the insertability of the upper elevating cord 3U into the insertion hole 4U is maintained, both the cross-sectional area of the upper elevating cord 3U and the area of the insertion hole 4U are maintained. Is smaller than the conventional technique. As a result, the movement of the upper screen 6U when ascending and descending is preferably restricted in the vertical direction, and the movement deviation width (for example, the displacement in the left-right direction) of the upper screen 6U when ascending and descending becomes small, and the pleated screen as a whole looks good. Can be maintained. This also applies to the lower elevating cord 3L and the insertion hole 4L.

(Comparative example)
On the other hand, as shown in FIGS. 10 (b) and 11 (b), in the configuration according to the comparative example, the cord diameters d'of the upper elevating cord 3U and the lower elevating cord 3L (raw shown in FIG. 9 (a)). The short diameter d1'in the ground view) is φ1.2 mm, the hole diameter D'' of the insertion hole 4U is φ5.0 mm, and the hole diameter D'of the insertion hole 4L is φ3.5 mm. The minor axis pd1 and the major axis pd2 as the code cross section of the pitch holding code 11 are each 0.8 × 2.0 mm, and the code diameter (cross section diameter) cd of the annular support cord 11a having a round cross section is φ0.2 mm. The bending diameter bd of the tip (bending portion) of the support cord 11a is approximately 1.5 mm in the contact state and approximately 3 mm in the non-contact state. The fabric thickness sd of the screen 6 is approximately 0.2 mm. In the configuration according to the comparative example, only the lower elevating cord 3L is engaged and inserted into the support cord 11a.

Therefore, in a state where the upper elevating cord 3U and the lower elevating cord 3L having a cord diameter d of φ1.2 mm are inserted into the hole diameter D'' (φ5.0 mm) of the insertion hole 4U according to the comparative example, FIG. 9A ), The gap between the insertion hole 4U and the upper and lower elevating cords 3U, 3L is approximately 1.61 mm (= D'(5.0 mm) -2 × in the front-rear direction. It is about d2'(2 x 1.2 x √2)) to 2.60 mm (= D'(5.0 mm) -2 x d1'(2 x 1.2)), and is an annular shape extending behind it. The bending diameter bd of the tip (bending portion) of the support cord 11a is larger than about 1.5 mm in the above contact state.
Further, in a state where the lower elevating cord 3L having a cord diameter d of φ1.2 mm is inserted into the hole diameter D'(φ3.5 mm) of the insertion hole 4L according to the comparative example, the fabric surface view shown in FIG. 9A is shown. As shown in, the gap between the insertion hole 4L and the lower elevating cord 3L is approximately 1.80 mm (= D'(3.5 mm) -d2'(1.2 x √2)) in the front-rear direction. It becomes about 2.30 mm (= D'(3.5 mm) -d1'(1.2)), and the contact state is set as the bending diameter bd of the tip (bending portion) of the annular support cord 12a extending behind it. It is larger than about 1.5 mm at one time.
Therefore, the light leakage generated from the insertion holes 4U and 4L becomes large, and the support cord 11a can enter the insertion hole 4U and the support cord 12a can enter the insertion hole 4L (may be caught), that is, the upper screen 6U or the like. By folding or stretching the lower screen 6L, the operation when moving up and down may be hindered.

Further, the hole diameter D'' (φ5.0 mm) of the insertion hole 4U and the hole diameter D'(φ3.5 mm) of the insertion hole 4L according to the comparative example are used as the code cross sections of the pitch holding cords 11 and 12 which are bendable. It is larger than twice the minor diameter pd1 × major diameter pd2 (φ1.0 mm). The gap between the insertion hole 4U and the upper and lower elevating cords 3U and 3L is approximately 1.61 mm to 2.60 mm in the front-rear direction as described above, and the insertion hole 4L and the lower elevating cord 3L As described above, the gap between them is approximately 1.80 mm to 2.30 mm in the front-rear direction, and the short diameter pd1 (0.8 mm) 2 as the code cross section of the pitch holding cords 11 and 12 that can be bent. It is more than doubled. Therefore, the light leakage generated from the insertion holes 4U and 4L becomes large, and the bendable pitch holding cords 11 and 12 can enter the insertion holes 4U and 4L, respectively (may be caught), that is, the upper part. By folding or stretching the screen 6U or the lower screen 6L, the operation when moving up and down may be hindered.

Further, the hole diameter D'' (φ5.0 mm) of the insertion hole 4U and the hole diameter D'(φ3.5 mm) of the insertion hole 4L according to the comparative example are as shown in FIGS. 10 (b) and 11 (b). The 45 ° projected diameter Da'' (5.0 / √2 ≈ 3.54 mm) of the insertion hole 4U is larger than twice the cord diameter d'(φ1.2 mm) of the upper elevating cord 3U, and the insertion hole 4L is also the same. Since the 45 ° projected diameter Da'(3.5 / √2≈2.47 mm) is larger than twice the cord diameter d'(φ1.2 mm) of the lower elevating cord 3L, the insertion hole 4U, The light leakage generated from 4L becomes large, and both the cross-sectional area of the upper elevating cord 3U and the lower elevating cord 3L and the areas of the corresponding insertion holes 4U and 4L are larger than those of the embodiment according to the present invention. The movement deviation width (for example, the deviation in the left-right direction) of the upper screen 6U and the lower screen 6L of the above is relatively large.

As described above, in the pleated screen of the second embodiment shown in FIGS. 6 and 7, an insertion hole provided for inserting only the upper elevating cord 3U and the lower elevating cord 3L into the upper screen 6U and the lower screen 6L, respectively. The size of 4U and 4L is so small that there is no space for other cords other than one for each of the upper elevating cord 3U and the lower elevating cord 3L. It can be improved and the light leakage generated from the insertion holes 4U and 4L can be reduced.

Further, in the pleated screen of the second embodiment, both the cross-sectional area of the upper elevating cord 3U and the lower elevating cord 3L and the areas of the corresponding insertion holes 4U and 4L are smaller than those of the conventional technique. The movement of the upper screen 6U and the lower screen 6L when ascending and descending is preferable, and the movement of the upper screen 6U and the lower screen 6L when ascending and descending is restricted in the vertical direction. You will be able to maintain a good-looking condition (improvement of dynamic design).

The upper screen 6U not only suppresses light leakage by eliminating the need for arrangement of an insertion hole for inserting the lower elevating cord 3L, but also suppresses light leakage, as can be understood from the front view shown in FIG. 7A. By arranging the upper elevating cord 3U and the lower elevating cord 3L so as to form one straight line, the aesthetic appearance can be enhanced (improvement of static design).

In the example of the upper screen 6U shown in FIGS. 10A and 11A, only the upper elevating cord 3U is engaged and inserted into the annular support cord 11a of the pitch holding cord 11. As in the modification 1 shown in 12 (a), the engaging piece 61 is formed by welding or the like on the back side of the upper screen 6U, and the lower elevating cord 3L is attached to the insertion hole 62 provided in the engaging piece 61. It can be inserted so that the pitch holding code 11 is not used. As a result, it is possible to completely prevent the pitch holding cord 11 and the support cord 11a from entering the insertion hole 4U.

Further, as in the modified example 2 shown in FIG. 12B, the lower elevating cord 3L is inserted through the insertion hole 62 provided in the engaging piece 61, and the annular support cord 11a in the pitch holding cord 11 is on the upper side. Both the elevating cord 3U and the lower elevating cord 3L may be configured to be engaged and inserted. As a result, it is possible to prevent the bending diameter bd of the support cord 11a from being unnecessarily shortened, and it is possible to further suppress the support cord 11a from invading the insertion hole 4U.

Further, as in the modified example 3 shown in FIG. 12 (c), the lower elevating cord 3L is inserted through the insertion hole 62 provided in the engaging piece 61, and the lower elevating cord 3L is inserted into the annular support cord 11a in the pitch holding cord 11. It is also possible to have a configuration in which only the side elevating cord 3L is engaged and inserted. As a result, the support cord 11a can be shortened and the support cord 11a can be further suppressed from entering the insertion hole 4U.

[Third Embodiment]
Next, with reference to FIG. 13, the pleated screen of the third embodiment having the upper screen 6U and the lower screen 6L will be described. The same reference numbers are assigned to the same components as those in the second embodiment.

The pleated screen of the third embodiment shown in FIG. 13 is the second embodiment in that the position of the insertion hole 4U provided in the upper screen 6U is offset toward the room side as compared with the insertion hole 4L provided in the lower screen 6L. The other points are the same as those of the second embodiment.

That is, as shown in FIG. 13B, the lower elevating cord 3L inserted into the insertion hole 4L provided in the substantially central portion of the width in the front-rear direction of the lower screen 6L is the head box as in the second embodiment. From 1, the back surface of the upper screen 6U is hung down by detouring so as to pass through the back surface of the intermediate rail 5 without being inserted into the insertion hole 4U provided in the upper screen 6U. Unlike the second embodiment, it is offset toward the room side and hangs down from the head box 1 to support the intermediate rail 5.

Therefore, for the insertion hole 4U, the upper elevating cord 3U hangs forward from the substantially central portion of the width in the front-rear direction (width 2 × a in the figure) of the intermediate rail 5 and is a distance b (<a) from the front surface of the intermediate rail 5. ) Is positioned in front of the upper screen 6U so as to support the intermediate rail 5. As a result, even if the lower elevating cord 3L is detoured so as to pass through the back surface of the intermediate rail 5 and hung down, the inclination of the intermediate rail 5 can be suppressed and the intermediate rail 5 can be kept substantially horizontal.

The pleated screen of the third embodiment has the hole diameters of the insertion holes 4U and 4L, the cord diameters of the upper elevating cord 3U and the lower elevating cord 3L, and the arrangement position of the upper elevating cord 3U and the lower elevating cord 3L in the front view. , Can be configured in the same manner as in the second embodiment.

Therefore, the pleated screen of the third embodiment can include all the advantages of the second embodiment described above, and can suppress the inclination of the intermediate rail 5 to keep it substantially horizontal.

[Fourth Embodiment]
Next, with reference to FIG. 14, the pleated screen of the fourth embodiment having the upper screen 6U and the lower screen 6L will be described. The same reference numbers are assigned to the same components as those in the second embodiment.

In the pleated screen of the fourth embodiment shown in FIG. 14, both the insertion hole 4U and the insertion hole 4L are provided at substantially the center of the front-rear width of the upper screen 6U and the lower screen 6L, respectively. The second implementation is that the lower elevating cord 3L is inserted through both the insertion hole 4U and the insertion hole 4L of the lower screen 6L, and the upper elevating cord 3U is hung on the back side of the upper screen 6U. It is different from the embodiment, and other points are the same as those of the second embodiment.

That is, as shown in FIG. 14B, the lower elevating cord 3L hanging from the head box 1 is inserted into the insertion hole 4U of the upper screen 6U, and then the width in the front-rear direction of the intermediate rail 5 (width 2 in the figure). It penetrates the intermediate rail 5 through the gangway 5a formed in the substantially central portion of × a), and then is inserted into the insertion hole 4L of the lower screen 6L and connected to the bottom rail 7.

On the other hand, the upper elevating cord 3U hanging from the head box 1 is hung on the back side of the upper screen 6U and connected to the intermediate rail 5. As a technique for hanging the elevating cord on the back side of the upper screen 6U, the techniques shown in FIGS. 10 (a), 11 (a), or 12 (a), (b), and 12 (c) can be applied. can.

Therefore, the formation positions of the insertion holes 4U and 4L with respect to each screen can be the same as those of the second embodiment, but only the lower elevating cord 3L is inserted through the insertion holes 4U and 4L, and below this. Since the side elevating cord 3L passes through the intermediate rail 5 from the head box 1 and hangs linearly from the bottom rail 7, the inclination of the intermediate rail 5 can be suppressed and the intermediate rail 5 can be kept substantially horizontal.

Then, the upper elevating cord 3U hanging from the head box 1 is hung on the back side of the upper screen 6U and connected to the intermediate rail 5 so as to support the intermediate rail 5 at a distance b (<a) from the back surface of the intermediate rail 5. Therefore, the upper screen 6U is not provided with an insertion hole for inserting the upper elevating cord 3U.

Also in the pleated screen of the fourth embodiment, the hole diameters of the insertion holes 4U and 4L, the cord diameters of the upper elevating cord 3U and the lower elevating cord 3L, and the arrangement position of the upper elevating cord 3U and the lower elevating cord 3L in front view. Can be configured in the same manner as in the second embodiment.

Therefore, the pleated screen of the fourth embodiment can include all the advantages of the second embodiment described above, and can suppress the inclination of the intermediate rail 5 to keep it substantially horizontal.

[Fifth Embodiment]
Next, with reference to FIG. 15, the pleated screen of the fifth embodiment having the upper screen 6U and the lower screen 6L will be described. The same reference numbers are assigned to the same components as those in the second embodiment.

In the pleated screen of the fifth embodiment shown in FIG. 15, the first insertion hole 4U through which the lower elevating cord 3L is inserted and the upper elevating cord 3U are inserted at the substantially central portion of the width in the front-rear direction of the upper screen 6U. The insertion holes 4U of 2 are arranged side by side in the front-rear direction, and the insertion holes 4L are provided in the substantially central portion of the width in the front-rear direction of the lower screen 6L. It differs from the second embodiment in that it is configured to hang down from the intermediate rail 5 to the bottom rail 7 at a substantially central portion of the width in the front-rear direction of the upper screen 6U and the lower screen 6L, and other points. Is the same as in the second embodiment.

That is, as shown in the fabric surface view in FIG. 15A, the upper screen 6U has a first insertion hole 4U through which the lower elevating cord 3L is inserted and an upper elevating / lowering cord at a substantially central portion of the width in the front-rear direction. A second insertion hole 4U through which the cord 3U is inserted is arranged side by side in the front-rear direction. Similar to the second embodiment, the lower screen 6L is provided with an insertion hole 4L through which the lower elevating cord 3L is inserted at a substantially central portion of the width in the front-rear direction.

Then, as shown in FIG. 15B, the lower elevating cord 3L hanging from the head box 1 is inserted into the first insertion hole 4U of the upper screen 6U, and then the width in the front-rear direction of the intermediate rail 5 ( It penetrates the intermediate rail 5 through the through-passage 5a formed in the substantially central portion of the width 2 × a) shown in the figure, and then is inserted into the insertion hole 4L of the lower screen 6L and connected to the bottom rail 7.

On the other hand, the upper elevating cord 3U hanging from the head box 1 is inserted into the second insertion hole 4U of the upper screen 6U and connected to the intermediate rail 5 as in the second embodiment.

Therefore, only the lower elevating cord 3L is inserted through one of the pair of insertion holes 4U arranged side by side in the upper screen 6U and the insertion hole 4L in the lower screen 6L, and the lower elevating cord 3L is inserted. Is hung linearly from the head box 1 through the intermediate rail 5 to the bottom rail 7, so that the inclination of the intermediate rail 5 can be suppressed and the intermediate rail 5 can be kept substantially horizontal.

Then, only the upper elevating cord 3U hanging from the head box 1 is inserted into the other of the pair of insertion holes 4U in the upper screen 6U.

Also in the pleated screen of the fifth embodiment, the hole diameters of the insertion holes 4U and 4L, the cord diameters of the upper elevating cord 3U and the lower elevating cord 3L, and the arrangement of the upper elevating cord 3U and the lower elevating cord 3L in front view. The position can be configured in the same manner as in the second embodiment.

Therefore, the pleated screen of the fifth embodiment can include all the advantages of the second embodiment described above, and can suppress the inclination of the intermediate rail 5 to keep it substantially horizontal.

In the example of the present embodiment, as shown in FIG. 16A, the upper screen has a pair of insertion holes 4U arranged side by side so that the lower elevating cord 3L and the upper elevating cord 3U are individually inserted. An example has been described in which the lower elevating cord 3L is provided in the substantially central portion of the width in the front-rear direction of 6U so as to hang linearly from the head box 1 to the bottom rail 7 via the intermediate rail 5. As shown in (b), the pair of insertion holes 4U may be spaced apart from each other by the width in the front-rear direction of the upper screen 6U. In this case, the lower elevating cord 3L is detoured to the back surface of the intermediate rail 5. It can be configured to hang down.

[Variations of the First to Fifth Embodiments]
FIG. 17 shows an enlarged perspective view of the periphery of the screen of a modified example applicable to the pleated screen of the first to fifth embodiments according to the present invention. In the pleated screens of the first to fifth embodiments described above, a string-shaped cord having a round cross section is assumed as the elevating cord 3, but instead of using such an elevating cord 3, as shown in FIG. The elevating cord 3T having a vertical width (major diameter) d2 and a thickness (minor diameter) d1 as a tape-shaped cord can be used.

Further, in the example shown in FIG. 17, instead of the round hole-shaped insertion hole 4 (or 4U, 4L), the insertion hole 4S through which the elevating cord 3T can be inserted is a screen 6 (or an upper screen 6U or a lower screen). It can be formed in the shape of a slit having a hole length D1 extending in the front-rear direction with respect to 6L). When the elevating cord 3T is inserted into the insertion hole 4S having the hole length D1, the insertion hole 4S has a hole width D2 having substantially the same length as the thickness (minor diameter) d1 of the elevating cord 3T, as shown in the fabric surface view. Will have.

The relationship between the hole width D2 of the insertion hole 4S and the minor axis d1 of the elevating cord 3T is the same as the examples shown in FIGS. 4 (a) and 5 (a), or FIGS. 10 (a) and 11 (a). Is regulated by. That is, for example, when applied as a modification of the first embodiment, the insertion hole 4S is in a state where the support cord 11a of the pitch holding cord 11 and the fabric (fabric thickness sd) of the screen 6 are in contact with each other. The tip of the annular support cord 11a (round cross-section diameter cd) provided in large numbers at equal intervals on the pitch holding cord 11 having a minor diameter pd1 × major diameter pd2 as a cord cross section with a gap in the front-rear direction between the lifting cord 3T and the elevating cord 3T. It is easily realized that the bending diameter (bending portion) is smaller than the bending diameter bd. Further, the hole width D2 of the insertion hole 4S shall be smaller than the major axis pd2 as the code cross section of the pitch holding cord 11 to be bendable, and further smaller than twice the minor diameter pd1. Further, the thickness (minor diameter) d1 of the elevating cord 3T according to the present invention is reduced in diameter with respect to both the minor diameter pd1 and the major diameter pd2 as the cord cross section of the pitch holding cord 11. Further, the hole length D1 of the insertion hole 4S has a diameter (45 ° projection diameter) projected vertically or horizontally when the screen 6 (or the upper screen 6U or the lower screen 6L) is tilted 45 ° from the horizontal. It can be twice or less the vertical width d2.

The hole width D2 of the insertion hole 4S is almost the same as the thickness (minor diameter) d1 of the elevating cord 3T, and the room for light leakage in the insertion hole 4S can be ignored in the left-right direction to prevent light leakage. It can be suitably suppressed.

FIG. 18 shows an enlarged perspective view around the screen of a further modified example applicable to the pleated screen of the first to fifth embodiments according to the present invention. In the pleated screen of the first to fifth embodiments described above, instead of the round hole-shaped insertion hole 4 (or 4U, 4L), a long hole-shaped insertion hole 4E elongated in the front-rear direction can be used. ..

In this case, as shown in the fabric surface view as an example 1, the cord-shaped cord having a round cross section is formed for, for example, a long hole-shaped insertion hole 4E having a hole length D1 and a hole width D2 in the front-rear direction. As shown in the configuration in which the elevating cord 3 (oval cross-sectional shape in the fabric surface view) having the cord diameter d (= d1, ≈D2) is inserted, and as shown in the fabric surface view as an example 2, for example, the hole length D1 and the hole width D2 are inserted. It is possible to insert the elevating cord 3T, which is a tape-shaped cord having a vertical width d2 and a thickness (minor diameter) d1 in terms of the cloth surface, through the long hole-shaped insertion hole 4E that is long in the front-rear direction. can.

Regarding the long hole-shaped insertion hole 4E that is long in the front-rear direction, the relationship between the hole width D2 of the insertion hole 4E and the short diameter d1 of the elevating cord 3 (or elevating cord 3T) is shown in FIG. 4 (a). ) And FIG. 5 (a), or the same as the examples shown in FIGS. 10 (a) and 11 (a). That is, for example, when applied as a modification of the first embodiment, the insertion hole 4E is in a state where the support cord 11a of the pitch holding cord 11 and the fabric (fabric thickness sd) of the screen 6 are in contact with each other. A large number of annular support cords 11a (round) provided at equal intervals on the pitch holding cord 11 having a minor diameter pd1 × major diameter pd2 as a cord cross section with a front-rear gap between the lift cord 3 (or the lift cord 3T) and the lift cord 3 (or the lift cord 3T). It shall be smaller than the bending diameter dd of the tip (bending portion) of the cross-sectional diameter cd). Further, the hole width D2 of the insertion hole 4E shall be smaller than the major axis pd2 as the code cross section of the pitch holding cord 11 to be bendable, and further smaller than twice the minor diameter pd1. Further, the minor axis d1 of the elevating cord 3 (or elevating cord 3T) according to the present invention is reduced in diameter with respect to both the minor axis pd1 and the major axis pd2 as the code cross section of the pitch holding code 11. Further, the hole length D1 of the insertion hole 4E has a diameter (45 ° projected diameter) projected vertically or horizontally when the screen 6 (or the upper screen 6U or the lower screen 6L) is tilted 45 ° from the horizontal. It can be twice or less the cord diameter d (or the vertical width d2 of the elevating cord 3T).

The hole width D2 of the insertion hole 4E can be substantially the same as the cord diameter d of the elevating cord 3 (or the thickness d1 of the elevating cord 3T), and there is room for light leakage in the insertion hole 4E in the left-right direction. Since it can be made negligibly small, light leakage can be suitably suppressed.

FIG. 19 shows an enlarged perspective view around the screen of a further modified example applicable to the pleated screen of the first to fifth embodiments according to the present invention. In the pleated screen of the first to fifth embodiments described above, instead of using the round hole-shaped insertion hole 4 (or 4U, 4L), the pleated screen is slightly wider than the cord diameter d of the elevating cord 3 (or 3U, 3L). It can be an insertion hole 4C having almost the same diameter.

In this case, the elevating cord 3 (or 3U, 3L) and the insertion hole 4C are visually recognized as a perfect circle even when viewed from the cloth surface, and since there is almost no gap between the insertion hole 4C and the elevating cord 3, the insertion hole 4C The relationship between the hole diameter D and the cord diameter d of the elevating cord 3 is regulated in the same manner as in the examples shown in FIGS. 4 (a) and 5 (a), or FIGS. 10 (a) and 11 (a). Therefore, in the example shown in FIG. 19, the room for light leakage in the insertion hole 4C can be made negligibly small in either the front-back direction or the left-right direction, so that the light leakage can be suitably suppressed.

Further, by configuring as shown in the modified example shown in FIG. 19, when the screen 6 (or the upper screen 6U or the lower screen 6L) is operated in the folding direction, friction is generated between the elevating cord 3 and the insertion hole 4C. As a result, the elevating cord 3 has an effect of restricting the elevating cord 3 from protruding from the front crease of the screen 6 (or the upper screen 6U or the lower screen 6L), and the design is improved.

Although the present invention has been described above with reference to examples of specific embodiments, the present invention is not limited to the examples of the above-described embodiments, and can be variously modified without departing from the technical idea. For example, an example of a pleated screen of a specific embodiment in which a screen that can be bent in the vertical direction is suspended and supported from a head box has been described, but a pleated screen of another embodiment in which the screen is suspended vertically or back and forth, and a pleated screen of another embodiment have been described. A screen having a structure in which a large number of foldable honeycomb-structured cylinders are continuously connected in the vertical direction can be suspended from the head box to support the screen, and the honeycomb-structured screen can be raised and lowered as a pleated screen.

Further, in the example of the above-described embodiment, a specific example has been described as an operating means for raising and lowering the screen, but any form can be used regardless of whether it is manual or electric.

Further, in the above-mentioned fifth embodiment, as a preferred example, the first insertion hole 4U for inserting the elevating cord 3U for raising and lowering the upper screen 6U into the upper screen 6U, and the elevating cord for raising and lowering the lower screen 6L. An example of forming the second insertion hole 4U through which 3L is inserted in a vertical arrangement arranged in the front-rear direction has been described. , The effect of suppressing light leakage by reducing the diameter of 3L is produced, and one or both of the pair of horizontal arrangement of insertion holes 4U arranged in the left-right direction is offset from the substantially central portion in the front-rear direction of the upper screen 6U. By forming the intermediate rail 5, it is possible to form a form that contributes to the effect of suppressing the inclination of the intermediate rail 5.

According to the present invention, the size of the insertion hole provided for inserting each elevating cord into the screen is set to an extremely small size so that there is no space for other cords or the like other than one elevating cord. It is useful for pleated screen applications because it can reduce light leakage from the insertion holes.

1 Headbox 2 Bracket 3,3T Lifting Cord 3U Upper Lifting Cord 3L Lower Lifting Cord 4,4U, 4L, 4S, 4E Insertion Hole 5 Intermediate Rail 6 Screen 6U Upper Screen 6L Lower Screen 7 Bottom Rail

Claims (4)

It ’s a pleated screen.
An insertion hole for inserting one elevating cord is provided in the foldable screen, and a gap when the elevating cord is inserted into the insertion hole holds a pitch for holding the screen at a predetermined pitch. The ring-shaped support of the cord is smaller than the bending diameter of the cord,
The cord diameter of the elevating cord is smaller than the major diameter of the pitch holding cord having an elliptical cross section of a minor axis and a major axis for holding the screen at a predetermined pitch, and the cord diameter of the elevating cord is that of the pitch holding cord. Smaller than the minor axis ,
Assuming that the screen is tilted by 45 ° , the 45 ° projected diameter of the insertion hole projected vertically or horizontally in the front-rear direction of the insertion hole shall be twice or less the cord diameter of the elevating cord.
By satisfying the conditions of the cord diameter of the elevating cord and the 45 ° projected diameter of the insertion hole, light leakage in the insertion hole is suppressed , and the movement of the bendable screen is restricted in the vertical direction during ascending / descending. A pleated screen characterized in that the movement deviation width of the screen is reduced . The insertion hole is provided as a round hole-shaped insertion hole for inserting one elevating cord into the bendable screen.
The pleated screen according to claim 1, wherein the hole diameter of the insertion hole is 1.8 mm as a specified value, and the cord diameter of the elevating cord is 0.7 mm as a specified value. The pleated screen according to claim 1 or 2, wherein the insertion hole is formed at a position offset from a substantially central portion in the front-rear direction of the screen. The elevating cord is formed of a string-shaped cord when the insertion hole is formed of a round hole, and is formed of a string-shaped cord or a tape when the insertion hole is formed of a long hole in the front-rear direction. The pleated screen according to any one of claims 1 to 3, wherein the pleated screen is made of a cord, and when the insertion hole is formed in a slit shape, it is made of a tape-shaped cord.

Images