JP6738740B2 - Horizontal blinds - Google Patents

Description

The present invention relates to a horizontal blind that raises and lowers a bottom rail using a lifting tape.

Horizontal blinds generally have a structure in which a bottom rail is lifted by spirally winding or unwinding a cord-shaped lifting cord on a winding cone rotatably supported in the head box. There is (for example, refer to Patent Document 1).

Since the elevating cord is wound around the winding cone in a spiral shape, the longer the elevating cord, the larger the diameter of the winding cone or the longer the total length of the winding cone. For this reason, when the total height of the horizontal blind is large or the width of the horizontal blind is narrow, it is difficult to secure a space for accommodating the winding cone in the head box, and the head box becomes large.

In such a case, the bottom rail may be moved up and down using a thin and wide tape-shaped lifting tape instead of the string-shaped lifting cord (see, for example, Patent Document 2). Since the lifting tape is thin, it can be wound up on the winding drum. The space required to install the take-up drum is smaller than the take-up cone. Therefore, there is an advantage that the headbox can be downsized by using the lifting tape instead of the lifting cord.

JP, 2007-177584, A JP-A-4-080491

By the way, in the horizontal blind, when it is desired to take outside light into the room, the slats are rotated in the opening direction to reduce the slant angle of the slats. As a result, outside light is taken into the room through the openings between the slats that are vertically adjacent to each other. It is said that the larger the opening, the more outside light can be taken in, which is preferable.

In the configuration of Patent Document 2, since the main surface of the lifting tape is arranged substantially parallel to the window surface, the lifting tape blocks outside light, and the area of the opening between the adjacent slats is substantially small. It has become.

The present invention has been made in view of such circumstances, and provides a horizontal blind capable of increasing the aperture ratio.

According to the present invention, a plurality of slats are rotatably supported by a slat support cord hung from a head box, and a bottom rail is movably supported by a lifting tape hung from the head box. In the horizontal blind, the elevating tape is arranged such that the main surface of the elevating tape is substantially perpendicular to the longitudinal direction of the slats at least at a part between the head box and the bottom rail. , Horizontal blinds are provided.

In the present invention, at least a part between the head box and the bottom rail is arranged so that the main surface of the lifting tape is substantially perpendicular to the longitudinal direction of the slats, so that it is viewed from the inside of the horizontal blind. The area of projection of the lifting tape at that time becomes smaller than that of the conventional technique, and the aperture ratio increases correspondingly, and the lifting tape becomes inconspicuous, so that the aesthetic feeling is improved.

Hereinafter, various embodiments of the present invention will be exemplified. The various embodiments described below can be combined with each other.
Preferably, the lifting tape is inserted into an insertion hole or a notch formed in the slat, and the insertion hole or the notch has a longitudinal direction of the insertion hole or the notch substantially with respect to a longitudinal direction of the slat. It is formed to be vertical.
Preferably, a slat retainer for fixing the slat support cord to the slat is provided, the lifting tape is inserted into an insertion hole or a notch formed in the slat retainer, and the insertion hole or the notch is the insertion hole. Alternatively, the notch is formed so that its longitudinal direction is substantially perpendicular to the longitudinal direction of the slat.
Preferably, the slat support cord includes a pair of warp threads, a weft thread disposed between the warp threads, and an annular portion protruding in a direction opposite to the weft thread, and the lifting tape is inserted into the annular portion.
Preferably, the head box is provided with a winding drum capable of being rotatably supported and capable of winding and rewinding the elevating tape, wherein the winding drum has a rotation axis of the winding drum which is the longitudinal direction of the slats. It is arranged so as to be substantially parallel to the direction, and is configured such that the lifting tape is wound around the winding drum in a state in which the lifting tape is twisted at a position before the winding drum.
Preferably, the head box is provided with a winding drum capable of being rotatably supported and capable of winding and rewinding the elevating tape, wherein the winding drum has a rotation axis of the winding drum which is the longitudinal direction of the slats. It is arranged so as to be substantially perpendicular to the direction.
Preferably, the lifting tape is provided in three or more pieces spaced apart in the longitudinal direction of the slat, and at least one lifting tape other than the two ends is at least a part between the head box and the bottom rail. In, the main surface of the lifting tape is arranged so as to be substantially perpendicular to the longitudinal direction of the slats.

It is a perspective view which shows the structure of the horizontal blind 1 of 1st Embodiment of this invention. It is an expansion perspective view which shows the structure of the drum unit 19 vicinity in FIG. 1A is a plan view of FIG. 1 seen from the upper side of the slat 7, showing a state in which the lifting tape 11 is inserted into the insertion hole 7a of the slat 7, and FIG. 1B is a schematic view of the horizontal blind 1 of FIG. It is a front view. (A) is a perspective view of a modified example in which the insertion hole 7a is provided in the slat 7 at a position biased to one edge, and (b) shows the lifting tape 11 inserted into the notch 7b instead of the insertion hole 7a. It is a perspective view of the made modified example and (c) is a top view of (b). (A) is a perspective view of a modified example in which the lifting tape 11 is inserted into the insertion hole 31b provided in the protruding piece 31a of the slat retainer 31, and (b) is provided in the warp thread 5a of the ladder cord 5. It is a perspective view of a modification in which lifting tape 11 was inserted in annular part 5c, and (c) is a top view of (b). It is an expansion perspective view which shows the structure of the winding drum 29 of the horizontal blind 1 of 2nd Embodiment of this invention. It is a perspective view which shows the structure of the horizontal blind 1 of 3rd Embodiment of this invention. 7A is a plan view of FIG. 7 as seen from the upper side of the slat 7, showing a state in which the lifting tape 11 is inserted into the insertion hole 7a of the slat 7, and FIG. FIG.

Various embodiments of the present invention will be described below with reference to the drawings. The various embodiments described below can be combined with each other.

1. First Embodiment A horizontal blind 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the horizontal blind 1 includes a head box 3, a ladder cord 5 suspended from the head box 3, and a lifting tape 11. As shown in FIG. 2, the ladder cord 5 includes a plurality of weft threads 5b between a pair of warp threads 5a. The slats 7 are supported on the respective weft threads 5b. The ladder cord 5 is fixed to the two slats 7 from above by a slat retainer 31. The ladder cord 5 corresponds to the "slat support cord" in the claims. The “slat support cord” is not limited in its structure as long as it can support and rotate the slat 7. For example, two warp threads separated from each other are provided, and one warp thread is attached to one edge of the slat. It may be attached so that the other warp thread is attached to the other edge of the slat. The lifting tape 11 has a thin and wide tape shape. The value of the width/thickness ratio of the lifting tape 11 is, for example, 5 or more, preferably 10 or more. The upper limit of the value of this ratio is not particularly specified, but is, for example, 20, 30, 40, 50, or 100.

A drum unit 19 is arranged in the head box 3. As shown in FIG. 2, the drum unit 19 includes a support member 21 fixed to the head box 3, a tilter drum 25 and a winding drum 29 rotatably supported by the support member 21. A drive shaft 23 having a non-circular cross section that rotates in accordance with the operation of the operation cord 13 is inserted into the tilter drum 25 and the winding drum 29. The tilter drum 25 and the winding drum 29 rotate as the drive shaft 23 rotates. Rotate. The drive shaft 23 is arranged substantially parallel to the longitudinal direction LS of the slat 7. The operation force applied to the operation cord 13 is converted into rotation of the drive shaft 23 via the operation pulley and the conversion gear arranged in the pulley case 17. In the electric blind, the drive shaft 23 rotates as the electric motor rotates.

A ladder cord suspension member 27 made of a metal ring is attached to the tilter drum 25. The ladder cord suspension member 27 is attached to the tilter drum 25 by its elastic force. One end of the pair of warp threads 5a of the ladder cord 5 is attached to the ladder cord suspending member 27, and as the drive shaft 23 rotates, the ladder cord suspending member 27 rotates together with the tilter drum 25, so that the slats 7 Is configured to change the inclination angle of. The ladder cord suspending member 27 rotates with the rotation of the tilter drum 25 until the slats 7 become substantially vertical, and thereafter, the tilter drum 25 idles with respect to the ladder cord suspending member 27. The other ends of the pair of warp threads 5a of the ladder cord 5 are attached to the bottom rail 9.

The lifting tape 11 has one end attached to the bottom rail 9 and the other end attached to the winding drum 29. As the take-up drum 29 rotates with the rotation of the drive shaft 23, the elevation tape 11 is taken up or rewound with respect to the take-up drum 29, so that the bottom rail 9 is moved up and down.

Each slat 7 is provided with an elongated insertion hole 7a through which the lifting tape 11 is inserted. As shown in FIG. 3A, the insertion hole 7a is formed so that the longitudinal direction L1 of the insertion hole 7a is substantially perpendicular to the longitudinal direction LS of the slat 7. Here, "the longitudinal direction L1 is substantially perpendicular to the longitudinal direction LS" means that the angle α of the insertion hole 7a in the longitudinal direction L1 with respect to the longitudinal direction LS of the slats 7 is 60 to 120 degrees, for example. The angle α is preferably 70 to 110 degrees, more preferably 80 to 100 degrees, and further preferably 85 to 95 degrees.

The insertion hole 7a does not hinder the vertical movement (direction of arrow H in FIG. 2) of the elevating tape 11 in the insertion hole 7a, and the main surface 11a of the elevating tape 11 rotates within the insertion hole 7a ( The rotation in the direction in which the angle β shown in FIG. 3A changes is limited to a predetermined angle range. The range in which the main surface 11a of the lifting tape 11 can rotate within the insertion hole 7a is a state in which the main surface 11a of the lifting tape 11 is parallel to the longitudinal direction L1 of the insertion hole 7a as shown in FIG. Is preferably within ±30 degrees, more preferably within ±20 degrees, still more preferably within 10 degrees. The length a in the longitudinal direction of the insertion hole 7a is preferably set to a size such that the lifting tape 11 inserted in the insertion hole 7a does not interfere with the slat 7 when the slat 7 is rotated. The length b of the insertion hole 7a in the lateral direction (direction perpendicular to the longitudinal direction) is larger than the thickness of the elevating tape 11 (preferably 2 to 40 times, more preferably 4 to 20 times) and the elevating tape 11 has a length b. It is preferable to set the width to 1/2 (preferably 1/3, 1/4, or 1/5) or less.

Thus, the longitudinal direction L1 of the insertion hole 7a is substantially perpendicular to the longitudinal direction LS of the slat 7, and the rotation of the main surface 11a of the lifting tape 11 within the insertion hole 7a is restricted. The lifting tape 11 is held in the insertion hole 7a such that the main surface 11a of the lifting tape 11 is substantially perpendicular to the longitudinal direction LS of the slat 7. Here, "the main surface 11a is substantially perpendicular to the longitudinal direction LS" means that the angle β of the main surface 11a of the elevating tape 11 with respect to the longitudinal direction LS of the slats 7 is 60 to 120 degrees. The angle β is preferably 70 to 110 degrees, more preferably 80 to 100 degrees, and further preferably 85 to 95 degrees.

When the main surface 11a of the lifting tape 11 is substantially perpendicular to the longitudinal direction LS of the slats 7, the projected area of the lifting tape 11 when the lifting tape 11 is viewed from the inside of the room is shown in FIG. As shown in FIG. 2, since the size is very small, the aperture ratio is significantly increased as compared with the case where the main surface 11a of the lifting tape 11 is parallel to the longitudinal direction LS of the slats 7 as in the prior art. In addition, since the lifting tape 11 is less noticeable, the aesthetic feeling is improved.

By the way, in the present embodiment, the rotation shaft of the winding drum 29 is coaxial with the drive shaft 23, and the drive shaft 23 is substantially parallel to the longitudinal direction LS of the slat 7. The rotation axis is also substantially parallel to the longitudinal direction LS of the slats 7. On the other hand, as described above, in the present embodiment, since the main surface 11a is substantially perpendicular to the longitudinal direction LS, the elevating tape at the twisted portion T before the winding drum 29 as shown in FIG. The lifting tape 11 is wound around the winding drum 29 in a state where 11 is twisted. In the portion above the twisted portion T, the principal surface 11a is not substantially perpendicular to the longitudinal direction LS, and in the present embodiment, in the portion below the twisted portion T, the principal surface 11a is in the longitudinal direction. It is almost perpendicular to LS. The twisted portion T is preferably provided between the uppermost slat 7 and the winding drum 29 in order to make the upper portion of the twisted portion T as small as possible.

The present embodiment can also be implemented in the following modes.
The shape of the insertion hole 7a is not particularly limited as long as it is an elongated shape, and may be, for example, an oval. In the above embodiment, the insertion hole 7a is provided substantially at the center of the slat 7 in the front-rear direction, but as shown in FIG. 4A, the insertion hole 7a may be provided at a position displaced in the front-rear direction.
-In place of the insertion hole 7a, as shown in FIGS. 4B to 4C, the elevating tape 11 may be inserted into the elongated cutout 7b. The notch 7b is formed so that the longitudinal direction L2 of the notch 7b is substantially perpendicular to the longitudinal direction LS of the slat 7, as shown in FIG. The meaning of "the longitudinal direction L2 is substantially perpendicular to the longitudinal direction LS" is the same as "the longitudinal direction L1 is substantially perpendicular to the longitudinal direction LS". The length a in the longitudinal direction of the notch 7b may be a depth that allows the lifting tape 11 to be held in the notch 7b, and is preferably 1/2 or more of the width of the lifting tape 11. The description of the length b in the lateral direction of the cutout 7b is the same as the description of the insertion hole 7a.
-Instead of forming the insertion hole or the notch in the slat 7, as shown in FIG. 5A, the protrusion piece 31a provided on the slat retainer 31 may be provided with the insertion hole 31b or the notch. The description of the insertion hole or notch of the slat retainer 31 is the same as that of the insertion hole or notch of the slat 7.
As shown in FIGS. 5B to 5C, an annular portion 5c is formed on the warp yarn 5a of the ladder cord 5 so as to project in the direction opposite to the weft yarn 5b, and the lifting tape 11 is attached to the annular portion 5c. It may be inserted. By restricting the rotation of the main surface 11a of the lifting tape 11 in the annular portion 5c, the main surface 11a of the lifting tape 11 is held substantially perpendicular to the longitudinal direction LS of the slats 7. The annular portion 5c is preferably formed such that the circumferential length thereof is slightly (for example, 2.1 to 3 times) larger than twice the width of the lifting tape 11.

2. Second Embodiment A second embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the first embodiment, and the main difference is that the direction of the rotation axis of the winding drum 29 is different from that of the first embodiment. The difference will be mainly described below.

In the first embodiment, since the rotation shaft of the winding drum 29 is coaxial with the drive shaft 23, the rotation of the drive shaft 23 can be transmitted to the winding drum 29 without using a conversion gear. Therefore, there is an advantage that the configuration is simple. On the other hand, in the first embodiment, as shown in FIG. 2, the twisted portion T is provided in front of the winding drum 29, but it is aesthetically unfavorable that the twisted portion T is arranged at a position visible to the user. It may be difficult to arrange the twisted portion T at a position that cannot be seen from the viewpoint of the configuration.

In the present embodiment, as shown in FIG. 6, the winding drum 29 is arranged so that the rotation shaft 29a of the winding drum 29 is substantially perpendicular to the longitudinal direction LS of the slats 7. With such a configuration, the lifting tape 11 can be wound around the winding drum 29 without twisting, so that the problem caused by the twisted portion T can be solved. The rotation of the drive shaft 23 can be transmitted to the winding drum 29 using a conversion gear (not shown) such as a bevel gear.

3. Third Embodiment A third embodiment of the present invention will be described with reference to FIGS. 7 to 8. The present embodiment is similar to the first embodiment, and the main difference is that the disposition of the lifting tape 11 is different from the first embodiment. The difference will be mainly described below.

In the present embodiment, the main surface of the lifting tape 11 is substantially perpendicular to the longitudinal direction LS for the central lifting tape 11 among the three lifting tapes 11 that are spaced apart in the longitudinal direction LS of the slats 7. On the other hand, the two elevating tapes 11 at both ends are arranged so that the main surface of the elevating tape 11 is substantially parallel to the longitudinal direction LS.

In the present embodiment, the central insertion hole 7a is formed such that its longitudinal direction L1 is substantially perpendicular to the longitudinal direction LS, and the longitudinal direction L1 of the insertion holes 7a at both ends is substantially parallel to the longitudinal direction LS. Is formed. By inserting the elevating tape 11 into these insertion holes 7a, the main surfaces of the elevating tape 11 at both ends become substantially parallel to the longitudinal direction LS, and the main surface of the elevating tape 11 at the center becomes substantially perpendicular to the longitudinal direction LS. The state has been realized.

Since the insertion holes 7a at both ends are formed in the vicinity of the edge of the slat 7 and the length c in the width direction W (direction perpendicular to the longitudinal direction LS) of the slat 7 is short, it is shown in FIG. 8(b). As described above, when the slats 7 are fully closed, the insertion holes 7a are blocked by the front slats 7 and the outside light S is prevented from entering the room through the insertion holes 7a. Light leakage is reduced.

As described above, in the present embodiment, the central elevation tape 11 which is relatively conspicuous is arranged such that the main surface thereof is substantially perpendicular to the longitudinal direction LS, so that the aperture ratio and the aesthetic appearance are improved. With respect to the lifting tapes 11 at both ends, light leakage through the insertion hole 7a in the fully closed state is reduced.

Here, the case where the number of the lifting tapes 11 is 3 has been described as an example, but when the number of the lifting tapes 11 is 4 or more, at least one lifting tape other than the two lifting tapes 11 at both ends is By arranging the main surface so as to be substantially perpendicular to the longitudinal direction LS, the same effect as described above can be obtained.

1: Horizontal blind, 3: Head box, 5: Ladder code, 7: Slat, 9: Bottom rail, 11: Lifting tape, 13: Operation code, 17: Pulley case, 19: Drum unit, 21: Support member, 23: Drive shaft, 25: tilter drum, 27: ladder cord suspension member, 29: winding drum, 31: slat retainer

Claims (8)

In a horizontal blind configured such that a plurality of slats are rotatably supported by a slat support cord hung from a headbox and a bottom rail is movably supported by an elevation tape hung from the headbox,
The elevating tape is arranged at least at a part between the head box and the bottom rail so that a main surface of the elevating tape is substantially perpendicular to a longitudinal direction of the slats. The lifting tape is inserted into an insertion hole or a notch formed in the slat,
The horizontal blind according to claim 1, wherein the insertion hole or the notch is formed such that a longitudinal direction of the insertion hole or the notch is substantially perpendicular to a longitudinal direction of the slat. A slat retainer for fixing the slat support cord to the slat,
The lifting tape is inserted into an insertion hole or a notch formed in the slat retainer,
The horizontal blind according to claim 1 or 2, wherein the insertion hole or the notch is formed such that the longitudinal direction of the insertion hole or the notch is substantially perpendicular to the longitudinal direction of the slat. The slat support cord includes a pair of warp threads, a weft thread arranged therebetween, and an annular portion projecting in a direction opposite to the weft thread,
The horizontal blind according to any one of claims 1 to 3, wherein the lifting tape is inserted into the annular portion. A winding drum that is rotatably supported in the head box and is capable of winding and rewinding the lifting tape;
The winding drum is arranged such that the rotation axis of the winding drum is substantially parallel to the longitudinal direction of the slat,
5. The lifting tape is wound around the winding drum in a state in which the lifting tape is twisted at a position before the winding drum, and the winding tape is wound around the winding drum. Horizontal blinds. A winding drum that is rotatably supported in the head box and is capable of winding and rewinding the lifting tape;
The horizontal blind according to any one of claims 1 to 4, wherein the winding drum is arranged such that a rotation axis of the winding drum is substantially perpendicular to a longitudinal direction of the slats. The lifting tape is provided in three or more pieces spaced apart in the longitudinal direction of the slat,
At least one lifting tape other than the two lifting tapes at both ends is arranged such that the main surface of the lifting tape is substantially perpendicular to the longitudinal direction of the slats in at least a part between the head box and the bottom rail. The horizontal blind according to any one of claims 1 to 6, which is arranged. The rotation of the elevating tape is restricted so that the angle of the main surface of the elevating tape with respect to the longitudinal direction of the slat is 80 to 100 degrees. Horizontal blinds.