JP6577538B2 - Horizontal blinds and bottom rails for horizontal blinds - Google Patents

Description

The present invention relates to a horizontal blind that supports a plurality of slats suspended from a head box via a ladder cord, and a bottom rail for the horizontal blind .

  In the horizontal blind, a ladder cord is supported by operating a ladder cord suspension device arranged in the head box with an operation device, with multiple slats supported by a plurality of ladder cords suspended from the head box. The slats can be rotated in the same phase via the.

  Also, a bottom rail is attached to the lower end of the ladder cord, and a lower end of an elevating cord hanging from the head box is attached to the bottom rail. And by raising / lowering a raising / lowering cord with the raising / lowering apparatus in a head box by operation of an operating device, a bottom rail can be raised / lowered and a slat can be raised / lowered.

  As one type of such a horizontal blind, there is one that allows a bottom rail to be raised and lowered by hanging a plurality of lifting cords forward and rearward of the slats without passing through the slats.

By adopting such a configuration, it is not necessary to provide a lifting / lowering cord insertion hole in each slat, so that light leakage from the insertion hole does not occur.
In Patent Document 1, in a horizontal blind that does not allow the lifting / lowering cord to pass through the slat, the slat is inserted between the wefts where the ladder cord intersects, and the notch formed at the edge in the front / rear direction of the slat is engaged with the intersecting portion of the weft Thus, a horizontal blind is disclosed which prevents fluttering of the slats with respect to the ladder cord and longitudinal displacement (hereinafter referred to as lateral displacement).

  Patent Document 2 discloses a bottom rail attached to the lower end of a ladder cord.

No. 7-6477 Japanese Utility Model Publication No. 53-147555

  However, in the horizontal blind as described above, for example, when the slat in which the notch is disposed above is closed and rotated (such as when it is reversely closed), the weft thread enters the notch, so that the slat on the notch side. The edge portion of the slat is disposed below the weft, and the rising degree of the slat is reduced. Therefore, there exists a problem that shielding property will fall.

An object of the present invention is to provide a horizontal blind and a bottom rail for a horizontal blind having high shielding properties.

Horizontal blinds in accordance with the present invention, the slats of multiple stage supporting the ladder cord is suspended supporting from the head box, along with the slats to be rotated through the ladder cord by operating the operating device, lift cords In the horizontal blind which can raise and lower the slats, the ladder cord comprises a plurality of wefts at each stage of the ladder cord, and has an insertion point where the slat is inserted between the weft yarns. The bottom rail attached to the lower end portion is one in which the warp of the ladder cord is fixed to the lower portions at both ends in the width direction when viewed from the longitudinal direction, and the upper side is formed shorter than the lower side, and the lower side is directed toward the upper side. A curved portion configured so that the rising wall becomes a curve is provided.

  In the horizontal blind, the bottom rail may be configured such that the upper side and the lower side are further curved and are connected to the wall.
  In the horizontal blind, the bottom rail may have a hollow cross-sectional shape.

  In the horizontal blind, protrusions protruding outward may be provided on the front and rear end edges of the lower side, and the tape holder may be engaged.
In the horizontal blind, the thickness of the central portion of the upper side may be greater than the thickness of the lower side.

  In the horizontal blind, when the slat is closed, the weft thread that supports the slat from below in the open rotation state of the slat is loosened, and the weft thread that is positioned on the slat in the open rotation state of the slat is You may make it become the tension state.

The bottom blind rail for the horizontal blind according to the present invention is such that the warp of the ladder cord is fixed to the lower part at both ends in the width direction when viewed from the longitudinal direction, the upper side is formed shorter than the lower side, and the vertical side stands from the lower side toward the upper side. A curved portion configured such that the rising wall becomes a curve is provided .

  ADVANTAGE OF THE INVENTION According to this invention, a horizontal blind with high shielding property can be provided.

The principal part perspective view of the horizontal blind in one Embodiment. (A) The schematic diagram of the head box in one Embodiment. (B) The top view which shows the slats from the uppermost stage to the 5th stage. (C) The top view which shows the 6th step | paragraph slat. (D) The top view which shows the slat of the 7th step or less. (E) The schematic diagram for demonstrating each raising / lowering winding shaft. (A) (b) The model partial side view of the horizontal blind in one Embodiment. The front view of the ladder cord in one embodiment. The front view of the ladder cord in one embodiment. (A)-(d) Explanatory drawing for demonstrating the assembly | attachment state of the ladder cord in one Embodiment, a slat, and a raising / lowering cord. The perspective view for demonstrating the assembly | attachment state of the ladder code in one Embodiment, a slat, and a raising / lowering cord. (A) (b) The partial side view for demonstrating the bottom rail in one Embodiment. (A)-(d) The schematic diagram for demonstrating the state at the time of forward closing rotation. (E)-(h) The schematic diagram for demonstrating the state at the time of reverse closing rotation. (A)-(d) The schematic diagram for demonstrating the state at the time of a fully fully closed rotation. (A)-(d) The schematic diagram for demonstrating the state at the time of reverse fully closed rotation. (A) (b) The partial expansion perspective view at the time of reverse closing rotation in one Embodiment. The partial cross section figure at the time of closed rotation in one embodiment. The partially expanded perspective view at the time of reverse closing rotation in another example. The front view of the ladder cord in another example. (A) The front view of the ladder cord in another example. (B) Explanatory drawing for demonstrating the assembly | attachment state of the ladder code and slat in another example. (C) The partially expanded perspective view at the time of reverse closed rotation in another example. (A)-(d) The schematic diagram for demonstrating the state at the time of the normal fully closed rotation in another example. The front view for demonstrating the type of the horizontal blind in another example. The side view for demonstrating the type of the horizontal blind in another example.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the horizontal blind shown in FIGS. 1 and 2, a plurality of ladder cords 2 (five in this embodiment) are suspended from the head box 1 at equal intervals, and the ladder cord 2 has a plurality of slats 3, 4. Is supported. Also, a plurality of (three in this embodiment) lifting / lowering cords 11 to 13 hang from the head box 1.

  As shown in FIG. 2 (a), the head box 1 is rotatably supported by elevating take-up shafts 14a to 14c capable of taking up the elevating cords 11 to 13, and can take up the ladder cord 2. The ladder take-up shaft 15 is rotatably supported.

  As shown in FIGS. 3A and 3B, a tilt spring 15a is wound around the outer periphery of the ladder take-up shaft 15 (not shown because it is on the back side of the up-and-down take-up shaft 14a), and the tilt spring 15a. The upper ends of the pair of warps 5a, 5b of the ladder cord 2 are locked to the respective end portions 15b. The pair of warp yarns 5 a and 5 b hang downward through a pair of front and rear ladder outlets 1 a provided in the head box 1. Therefore, for example, as shown in FIG. 3B, when the ladder take-up shaft 15 is rotated (clockwise in the drawing), one warp thread 5a is moved to the ladder take-up shaft 15 (tilt spring 15a). ) And the other warp yarn 5b is led out from the ladder take-up shaft 15 (ladder outlet 1a). All (5 in this embodiment) of the ladder winding shaft 15 are synchronously rotated in the same direction by the operation of the operating device 16 (see FIG. 2A), and the slats 3 are connected via the ladder cord 2. Can be rotated into an open rotation state, a normally closed rotation state, or a reverse closed rotation state.

  As shown in FIGS. 2A and 2E, the upper end portions of the lifting cords 11 to 13 are fixed to the lifting and lowering winding shafts 14a to 14c, respectively. As shown in FIGS. 3 (a) and 3 (b), the lifting / lowering cords 11 to 13 have a pair of lifting / lowering outlets 1b provided on the outer side in the front-rear direction of the pair of front and rear ladder outlets 1a provided on the head box 1. It hangs down through either one. When the lifting / lowering winding shafts 14a to 14c are rotated, the lifting / lowering cords 11 to 13 are wound spirally around the lifting / lowering winding shafts 14a to 14c, or the lifting / lowering cords 11 to 13 are lifted / lowered winding shafts 14a. -14c (elevation outlet 1b).

  As shown in FIGS. 1 and 2 (a) to 2 (e), in this embodiment, the elevating cords 11 and 13 positioned on both sides in the longitudinal direction of the slats 3 and 4 hang down to the rear side of the slats 3 and 4, respectively. The lifting / lowering cord 12 located at the center in the longitudinal direction of 3 and 4 hangs down to the front side of the slat 3. The rear side is the outdoor side, and the front side is the indoor side.

  Of the lifting cords 11 to 13, the winding direction of the lifting cords 11 and 13 to the lifting and lowering winding shafts 14a and 14c is opposite to the winding direction of the lifting and lowering cord 12 to the lifting and lowering winding shaft 14b. It is said that.

  More specifically, as shown in FIG. 2A, when a motor (not shown) is driven by the operation of the operating device 16, the shaft 17 and the lifting and lowering winding shafts 14a and 14c rotate integrally and via the gear portion 18. Thus, when the rotational force is transmitted in the reverse direction, the lifting / lowering take-up shaft 14b that is rotatable (idling) with respect to the shaft 17 rotates in the reverse direction. Thereby, all the raising / lowering cords 11-13 are wound around the raising / lowering winding shafts 14a-14c synchronously, or are derived | led-out from the raising / lowering winding shafts 14a-14c (elevation extraction port 1b) synchronously. become.

  A bottom rail 19 is attached to the lower end of the ladder cord 2 as shown in FIGS. Specifically, the bottom rail 19 of the present embodiment has the warp threads 5a and 5b of the ladder cord 2 fixed to the lower ends of both ends in the width direction (that is, the front-rear direction) when viewed from the longitudinal direction, and the upper ends at both ends in the width direction are directed upward. It is set as the curved part 19a which curved to the width direction inner side, so that it goes. Specifically, as shown in FIG. 8B, the bottom rail shape member of the bottom rail 19 is formed in a substantially rectangular shape with a hollow cross-sectional shape. As shown in FIG. 8B, the bottom rail shape material of the present embodiment is formed such that the length of the upper side 19b (length along the front-rear direction) L1 is shorter than the length L2 of the lower side 19c, and the outer periphery is formed. Both the upper side 19b and the lower side 19c are formed as loose curves, and a wall rising from the lower side 19c toward the upper side 19b is formed as a curve so as to be continuous with the curved surface on the outer periphery of the upper side 19b. In addition, the tape holder 19e (see FIG. 8A) can be engaged by providing front and rear projecting pieces 19d projecting outward at the front and rear end edges of the lower side 19c. Moreover, the thickness L3 of the center part of the upper side 19b is formed thicker than the thickness L4 of the lower side 19c. Further, lower ends of the lifting cords 11 and 13 hanging from the rear side of the slat 3 to the outdoor side are fixed to the lower part of the rear side of the bottom rail 19 and are forward of the slats 3 and 4 and to the indoor side. The lower end portion of the hanging lifting / lowering cord 12 is fixed to the lower portion on the front side of the bottom rail 19. FIG. 8A shows a state in which the lower end portion of the rear lifting / lowering cord 11 is fixed to the lower portion of the bottom rail 19 on the rear side.

As shown in FIG. 4, the ladder cord 2 is provided with a multi-stage of two weft threads 6a, 6b for supporting the multi-stage slats 3, 4 between the warp threads 5a, 5b.
Each of the weft yarns 6a and 6b is formed at a position spaced apart from the warp yarns 5a and 5b in the vertical direction so that a crossing portion 7 intersecting with each other is formed at the intermediate portion. That is, in one warp 5a, the weft 6b is formed below the weft 6a, and in the other warp 5b, the weft 6a is formed below the weft 6b. Therefore, for example, when the warp 5a moves downward and the warp 5b moves upward as shown in FIG. 5 by the operation of the operation device 16, the weft 6b slightly loosens, whereas the weft 6b slightly loosens. Is in a tensioned state.

  The slats 3 and 4 are thin aluminum plates and are formed in a curved shape having a convex shape when viewed from the side (longitudinal direction). Two types of slats 3 and 4 are used in the present embodiment, and the slats 3 in the seventh and lower stages are notched only at the rear side edge adjacent to the lifting cords 11 and 13 as shown in FIG. A portion 3a is provided. Further, as shown in FIGS. 2B and 2C, the slats 4 from the uppermost stage to the sixth stage are provided with a notch portion 4a at the rear side edge adjacent to the elevating cords 11 and 13, and the elevating cord. A notch 4 b is also provided at the front edge adjacent to 12. 2B shows the slats 4 from the top to the fifth level, FIG. 2C shows the sixth level slats 4, and FIG. 2D shows the seventh level and below. The slats 3 are respectively illustrated.

  And in the location where each notch part 3a, 4a, 4b was provided, as shown in FIG.1, FIG.6 (a) (b) (d) and FIG.7, each notch part 3a, 4a, 4b is the said, respectively. The slats 3 and 4 are inserted between the wefts 6a and 6b so as to face the intersecting portion 7 (insertion points). Moreover, in the place where each notch part 3a, 4a is not provided, as shown in FIG.1 and FIG.6 (c), each slat 3,4 is mounted and arrange | positioned on the weft thread 6a, 6b (upper) Riding point). In addition, each stage of the ladder code 2 (in this embodiment, the second and fourth ladder codes 2 from the end and the single ladder code portion Z) in which the lifting codes 11 to 13 do not exist along the ladder code 2. Then, all the slats 3 and 4 are put on the weft threads 6a and 6b to become the above-mentioned riding places.

  As shown in FIGS. 1, 6A and 7, the elevating cords 11 and 13 are inserted between the wefts 6a and 6b at the sixth stage or less. Specifically, the lifting cords 11 and 13 of the present embodiment are in the sixth stage or less, and as shown in FIG. 7, the weft yarns 6a and 6b so that the intersecting portion 7 is interposed between the slats 3 and 4, as shown in FIG. Is inserted in between. In the sixth stage and below, the lifting cords 11 and 13 are inserted between the weft yarns 6a and 6b on the rear side from the intersecting portion 7, and the slats 3 and 4 are inserted between the weft yarns 6a and 6b on the front side from the intersecting portion 7. Yes.

  Further, as shown in FIG. 1 and FIG. 6B, the lifting cords 11 and 13 are not inserted between the weft yarns 6a and 6b but arranged along the warp yarns 5a from the top to the fifth step. Yes. Here, ring members R are provided at every second stage (between the uppermost stage (first stage) and the second stage, and between the third stage and the fourth stage) on the warp 5a along the lifting cords 11 and 13. Each is provided so as to penetrate. Further, by providing the ring members R so as to penetrate the elevating cords 11 and 13, the ring members R are held so that the distance from the warp yarn 5a is not more than a certain value. The ring member R between the uppermost stage (first stage) and the second stage is formed to have a larger diameter than the ring member R between the third stage and the fourth stage. 13 is guided so as to gradually approach the warp yarn 5a until it is inserted into the sixth weft yarn 6a, 6b (see FIG. 3). Further, the ring member R of the present embodiment is made of a resin material.

  As shown in FIGS. 1 and 6 (c), the lifting / lowering cord 12 has wefts 6a and 6b every second stage (ie, the sixth stage, the ninth stage, and the twelfth stage) at the sixth stage or less. Is inserted in between. In the sixth stage, the lifting / lowering cord 12 is also inserted between the weft threads 6a and 6b so that the intersecting portion 7 is interposed between the lifting and lowering cords 11 and 13 and the slat 4. In the sixth stage, the lifting / lowering cord 12 is inserted between the weft yarns 6 a and 6 b on the front side from the intersecting portion 7, and the slat 4 is inserted between the weft yarns 6 a and 6 b on the rear side from the intersecting portion 7. Further, in the 7th stage or less (that is, the 9th stage and the 12th stage), the lifting / lowering cord 12 is inserted between the weft yarns 6a and 6b on the front side from the intersecting portion 7, and the weft yarn 6a on the rear side from the intersecting portion 7 is inserted. The slat 4 is not inserted between 6b. In the present embodiment, the sixth stage at the position along the lifting cords 11 and 13 constitutes the first insertion place, and the sixth stage at the position along the lifting code 12 constitutes the second insertion place. .

  Moreover, as shown in FIG.1 and FIG.6 (d), the raising / lowering code | cord | chord 12 is not inserted between the wefts 6a and 6b from the uppermost stage to the 5th stage, but is arrange | positioned along the warp 5b. Here, the ring member R passes through every second stage (between the uppermost stage (first stage) and the second stage, and between the third stage and the fourth stage) of the warp yarn 5b along the lifting cord 12. Are provided respectively. Further, by providing the ring member R so as to penetrate the elevating cord 12, the distance from the warp yarn 5b is held to be a certain value or less. In addition, the ring member R through which the lifting / lowering cord 12 penetrates also has a larger diameter than the ring member R between the third stage and the fourth stage of the ring member R between the uppermost stage (first stage) and the second stage. At the time of closing and turning, the lifting / lowering cord 12 is guided so as to gradually approach the warp yarn 5b until it is inserted into the sixth weft yarns 6a and 6b.

Next, the operation of the horizontal blind constructed as described above will be described.
First, the action regarding the shielding property will be described.
When the operation device 16 is operated, as shown in FIGS. 9 (a) to 9 (c), the weft yarn 6a is moved at the time of forward rotation in which the rear warp 5a moves downward and the front warp 5b moves upward. Is slightly loosened, and the weft thread 6b is in a tensioned state.

  At this time, as shown in FIG. 9A, the weft thread 6 a enters the notch 4 a of the slat 4 on the upper side (from the top to the fifth) of the hanging part of the lifting cords 11, 13, When the rear side edge (lower edge) falls downward, the degree of rising of the slat 4 increases.

  At this time, the weft thread 6a enters the notches 3a and 4a of the slats 3 and 4 as shown in FIG. As the rear side edge portions (lower end edge portions) of 3 and 4 fall downward, the rising degree of the slats 3 and 4 increases.

  At this time, on the upper side (from the uppermost stage to the sixth stage) of the hanging portion of the lifting / lowering cord 12, the weft thread 6b supports the notch 4b of the slat 4 as shown in FIG. The front side edge (upper edge) of the slat 4 is in a lowered position, and the rising degree of the slat 4 is slightly smaller than the hanging part of the lifting cords 11 and 13, but the hanging part of the lifting cords 11 and 13 The shielding performance from the uppermost stage to the sixth stage does not decrease due to the fall of the heel.

  For example, as shown in FIG. 9D, the lower side (seventh stage or less) of the hanging part of the lifting / lowering cord 12 and the part of each stage of the single ladder cord part Z are stretched (tensioned). On the weft thread 6b in the state, the front side edge (upper edge) of the slat 4 is pushed in the rising direction, and the shielding property is increased at the same position.

  And as a whole, although there is an element in which the shielding property is lowered on the upper side (from the uppermost stage to the sixth stage) of the hanging part of the lifting / lowering cord 12, it is complemented at different parts in the longitudinal direction, so that the whole shielding property is obtained. Is high and good.

  In addition, as shown in FIGS. 9E to 9G, when the operation device 16 is operated, as shown in FIGS. 9E to 9G, the backward warp 5a moves upward and the forward warp 5b moves downward. The weft 6b is slightly loosened, and the weft 6a is in a tensioned state.

  At this time, since the weft thread 6a supports the notch portion 4a of the slat 4, as shown in FIG. 9 (e), on the upper side (from the uppermost stage to the fifth stage) of the hanging part of the lifting cords 11 and 13, the slats The rear edge (upper edge) of 4 is in a lowered position, the rising degree of the slat 4 is slightly reduced, and the shielding performance tends to be lowered at the same location.

  At this time, the weft thread 6a also supports the notches 3a and 4a of the slats 3 and 4 as shown in FIG. The rear edge (upper edge) of the slats 3 and 4 is in a lowered position, and the rising degree of the slats 3 and 4 is slightly reduced, and the shielding performance tends to be lowered at the same location.

  However, on the upper side (from the uppermost stage to the sixth stage) of the hanging portion of the lifting / lowering cord 12, the weft thread 6 b enters the notch 4 b of the slat 4 as shown in FIG. Since the part (lower edge part) falls downward, the rising degree of the slat 4 is increased, so that the shielding property is not lowered.

  Further, at this time, as shown in FIG. 9 (h), the lower side (seventh stage or less) of the hanging part of the lifting / lowering cord 12 and each stage of the individual ladder cord part Z are stretched (tension is applied). In this state, the rear edge (upper edge) of the slat 4 is pushed upward in the state where the slat 4 is raised, and the shielding performance is increased at the same position. Complements the tendency of falling angle in reverse fully closed to maintain a high shielding state.

  And as a whole, although there is an element in which the shielding performance is lowered due to reverse full closure at the hanging portion of the elevating cords 11 and 13, the whole shielding property is high and good by complementing at different locations in the longitudinal direction.

  In the state shown in FIGS. 9 (a) and 9 (b) of the hanging portions of the lifting / lowering cords 11 and 13 (at the time of normal closing rotation), the center part in the front-rear direction of the slat 4 is shown in FIG. 9 (a) by the weft 6b. By being restrained in the left direction (front direction of the slat 4) in (b), the front side edge portion (upper edge portion) of the slat 4 is held so as to rise. Therefore, the shielding property becomes high at the same location. Further, in 6 stages or less (see FIG. 9B), since the elevating cords 11 and 13 are located between the rear edge of the slats 3 and 4 and the warp 5a, the rising is good. Therefore, the shielding property is further increased at the same location.

  In the state shown in FIG. 9 (g) of the hanging portion of the lifting / lowering cord 12 (at the time of reverse closing rotation), the central portion in the front-rear direction of the slat 4 is moved rightward (slatted) in FIG. 9 (g) by the weft 6a. 4), the rear side edge (upper edge) of the slat 4 is held up. Therefore, the shielding property becomes high at the same location.

  Further, at the time of the sixth fully-closed rotation of the hanging portion of the lifting / lowering cord 12, the lifting / lowering cord 12 and the warp 5 b rise up from the upper edge of the slat 4 as shown in FIGS. 10 (a) and 10 (b). Therefore, the shielding property is improved (as compared with the case where the lifting / lowering cord 12 is not provided).

  In addition, at the time of the fully-closed rotation of the sixth and lower stages of the hanging portions of the lifting cords 11 and 13, as shown in FIGS. 10 (c) and 10 (d), as shown in FIGS. The shielding property is also improved by interposing 13.

  Further, at the time of reverse fully closed rotation at the sixth stage of the hanging position of the lifting / lowering cord 12, as shown in FIGS. 11 (a) and 11 (b), the lifting / lowering cord 12 is interposed between the slat 4 and the warp 5b. Shielding is improved.

  Further, at the time of the reverse fully closed rotation at the sixth stage or less of the hanging portion of the lifting / lowering cords 11 and 13, as shown in FIGS. 11 (c) and 11 (d), the lifting / lowering cords 11 and 13 and the warp yarn 5a are slats 3 and 4, respectively. Since the upper end edge is pushed in the direction in which the rising degree is increased, the shielding property is improved (as compared with the case where the elevating cords 11 and 13 are not provided).

Next, the movement of the slats 3 and 4 with respect to the ladder cord 2 in the longitudinal direction, that is, the action relating to the lateral displacement will be described.
For example, when the notched portions 3a and 4a on the rear side edge portions of the slats 3 and 4 are rotated downward, the ladder cord 2 (particularly the weft 6a) is engaged with the notched portions 3a and 4a. The lateral displacement of the slats 3 and 4 is prevented.

  Further, when the notched portion 4b at the front side edge of the slat 4 is turned in the reverse closing direction, the ladder cord 2 (particularly the weft thread 6b) is formed in the notched portion 4b on the upper side (from the uppermost stage to the sixth stage). By engaging, the lateral displacement of the slat 4 is prevented.

  Further, at the time of the reverse closing rotation, on the lower side (seventh stage or less), the lifting cords 11 and 13 are inserted between the weft yarns 6a and 6b, so that a notch portion on the rear side edge portion (upper edge portion). When the elevating cords 11 and 13 act (engage) in addition to the ladder cord 2 to 3a, the lateral displacement of the slat 3 is prevented.

  Specifically, when the slat 3 tries to shift laterally in the direction of the arrow shown in FIG. 12A, that is, in the right direction, the weft thread 6b is engaged with the weft thread 6a engaged with the lift code 11 by inserting the lift code 11. The lateral displacement of the slat 3 in the right direction is prevented by the weft thread 6b engaging with the left edge portion of the notch 3a.

  On the other hand, when the slat 3 tries to laterally shift in the arrow direction shown in FIG. 12B, that is, in the left direction, the weft thread 6b engaged with the lifting / lowering cord 11 engages with the right edge portion of the notch 3a. Is prevented from shifting to the left.

  Further, as described above, when the notched portions 3a and 4a at the rear side edge portions of the slats 3 and 4 are rotated downward, the central portion in the front-rear direction of the slats 3 and 4 is shown in FIG. a) By being restrained in the left direction (forward direction of the slat 4) in (b), the posture is stably maintained, and the lateral displacement of the slats 3 and 4 is prevented.

  Further, as described above, when the notched portion 4b at the front side edge of the slat 4 is reversely rotated, the central portion in the front-rear direction of the slat 4 is moved rightward in FIG. By being restrained in the rear direction of the slats 4, the posture is stably maintained, and the lateral displacement of the slats 4 is prevented.

Next, the characteristic effects of the above embodiment will be described below.
(1) The weft yarns 6a and 6b are in a state in which one weft yarn is tensioned (tensioned) in the vicinity of the fully-closed angle, both in the normal closing rotation and in the reverse closing rotation. Therefore, at the upper portion where the slats 3 and 4 are placed on the weft yarns 6a and 6b, the upper edge of the slats 3 and 4 is on the weft yarn 6a (6b) in a tensioned state. It is pushed in the direction to get up (the direction toward the upper surface side of the blind anteroposterior direction in the vicinity of the full closing angle), and the shielding property is enhanced at the same location.

  Further, at the insertion point where the slats 3 and 4 are inserted between the weft yarns 6a and 6b, as described above, the upper edge of the slats 3 and 4 is lowered at the time of forward rotation and reverse rotation. Then, the rising degree of the slats 3 and 4 becomes relatively small, and there is an element that the shielding property is lowered at the same location. However, it is possible to make the entire shielding property high and good by complementing at different places in the longitudinal direction (the above-mentioned upper place).

(2) Since at least one upper location is provided on each stage, the shielding property of each stage can be made high and favorable.
(3) Since the location corresponding to the longitudinal ends of the slats 3 and 4 is the insertion location, the longitudinal ends of the slats 3 and 4 are less likely to flutter with wind or the like.

  (4) At the lifting / lowering cord insertion location where the lifting / lowering cords 11 to 13 are inserted between the weft threads 6a and 6b, as shown in FIGS. 10 (a) to 10 (d) and FIGS. 11 (a) to 11 (d) The shielding properties are improved by 11 to 13.

  (5) The bottom rail 19 has a curved portion 19a (curved wall rising from the lower side 19c toward the upper side 19b) that is curved inward in the width direction as the upper ends of both ends in the width direction are directed upward. During movement, for example, as shown in FIG. 13, when the one of the warps 5 a is along the curved portion 19 a at the time of the normal closing rotation (as compared to the case where the upper ends in the width direction are square), the rising degree of the bottom rail 19 is increased. It becomes larger and the shielding property at the same location becomes higher.

  (6) In the single notch step (seventh step or less), when the notched portion 3a is rotated in the normally closed direction, the ladder cord 2 (particularly the weft thread 6a) is engaged with the notch portion 3a, so that the slat 3 A lateral shift is prevented. Further, even when the notched portion 3a is turned upward and reversely closed, the elevating cords 11 and 13 act on the notched portion 3a in addition to the ladder cord 2 (particularly the weft thread 6a) to prevent the slat 3 from slipping laterally. Is done.

  Further, at both notch stages (fifth stage from the top), the ladder code 2 along which the elevating cords 11 and 13 are aligned is fully closed and engaged with the notched portions 3a and 4a, and the ladder code 2 along which the elevating cord 12 is aligned is reversed. Engage with the notch 4b when fully closed. Accordingly, the lateral displacement of the slat 4 is prevented during both the normal closing rotation and the reverse closing rotation. The sixth stage is the same, but the lateral displacement is surely prevented from the amount that the lifting / lowering cords 11 to 13 are inserted.

  Further, in the one notch step (the seventh step or less), since the notch portion 3a is provided only at the rear side edge portion of the slat 3, the aesthetic appearance is good and the light leakage is reduced and the shielding property is increased. In addition, lateral slippage is prevented even when reverse fully closed.

  (7) The lifting / lowering cords 11 to 13 have a constant lead-out position from the head box 1, that is, the front / rear direction position of the lifting / lowering outlet 1b in the front / rear direction. Although it is necessary to arrange outside the warp yarns 5a, 5b of the cord 2, the lateral displacement of the slat 4 can be prevented even from the uppermost stage to the predetermined stage. That is, the lateral displacement of the slats 3 and 4 while satisfying the restriction that the elevating cords 11 to 13 must be arranged outside the warp yarns 5a and 5b of the ladder cord 2 from the uppermost stage to the predetermined stage (the fifth stage in the present embodiment). Can be prevented. Further, since the ring member R having a large diameter is provided on the warp yarns 5a and 5b of a predetermined step from the top, and the ring member R having a small diameter is provided on the warp yarns 5a and 5b lowered by a predetermined step, the ring member R having a small diameter is further predetermined. The elevating cords 11 to 13 can be guided gradually toward the center in the front-rear direction of the slat 4 between the wefts 6 a and 6 b of the ladder cord 2 that supports the slat 4 provided below the step.

  (8) Since the edge on the side where the notch 3a is provided only on one side edge is the rear edge, the slat 3 provided with the notch 3a has no notch on the front edge. Thus, the appearance viewed from the front side (inside the room) can be improved. In addition, the design is refreshed compared to the conventional pico-passing system.

  (9) In the upper six stages, the slats 3 and 4 are inserted between the weft threads 6a and 6b so that the notches 3a, 4a and 4b face the intersecting parts 7, respectively. , 4b are opposed to the crossing portion 7, respectively (regardless of the arrangement of the lifting / lowering cords 11 to 13). Fluctuation and lateral displacement can be prevented well. In the sixth stage, the slat 4 is inserted into the front triangle of the wefts 6a and 6b intersecting at least in one row of the plurality of ladder cords 2, and the slat 4 is inserted into the rear triangle in at least one row. There is less bias compared to inserting in a triangle. Moreover, although the notches 4a and 4b are provided, the shielding performance is improved by interposing the lifting / lowering cords 11-13.

The above embodiment may be modified as follows.
As shown in FIG. 14, the lifting cords 11 and 13 and the slats 3 (4) are inserted into a common space so that the wefts 31 a to 31 d do not intersect in plan view, and the left side of one slat 3 (4) The weft 31b that is on the right in plan view is formed below the warp 5a from the weft 31a that is on the left in plan view, and the weft 31c that is on the right in plan view on the right side of the same slat 3 (4) in plan view. You may form above the warp 5a rather than the weft 31d which comes to the left side.

  In this example, for example, regardless of which of the slats 3 is laterally displaced in the left-right direction, one of the weft threads 31b, 31d engaged with the lifting cords 11, 13 at one of the longitudinal ends is the edge of the notch 3a. By engaging the portion, the lateral displacement of the slat 3 in the left-right direction is prevented.

-In the said embodiment, although the wefts 6a and 6b of each step were comprised with two, it is not limited to this, You may comprise with three or more.
For example, as shown in FIG. 15, four wefts 41 a to 41 d may be provided in each stage. In this example, in one warp 5a, wefts 41a to 41d are formed at equal intervals from above, and in the other warp 5b, wefts 41c, 41d, 41a, 41b are formed from above at equal intervals. ing. And the slat 3 should just be inserted in the space between the crossing part 42 and the warp 5b so that the said notch 3a (illustration omitted in FIG. 15) may oppose the crossing part 42 of the weft 41a and the weft 41d. .

  For example, as shown to Fig.16 (a), it is good also as a structure which provided the three wefts 6a, 6b, 51 in each step | level. In this example, the weft thread 51 is spirally entangled with the weft thread 6b between about 2/3 from the warp thread 5b to the warp thread 5a. And the said raising / lowering cord 11 (13) is inserted between the part where the weft 6b and the weft 51 are not entangled (the warp 5a side).

  In this example, as shown in FIGS. 16B and 16C, the slat 3 has the weft yarns 6a and 6b on the warp yarn 5b side (front side) from the intersecting portion of the weft yarns 6a and 6b and the intersecting portion of the weft yarns 6a and 51. Inserted between.

  Even if it does in this way, as shown in FIG.16 (c), even at the time of reverse closing rotation, the wefts 6b and 51 engaged with the raising / lowering cord 11 engage with the edge part of the notch part 3a. The lateral displacement of the slat 3 in the left-right direction is prevented.

  As shown in FIGS. 17 (a) and 17 (b), the lifting / lowering cord 12 and the slat 4 are placed in a common space so that the weft threads 6a and 6b do not intersect in plan view at the sixth stage of the hanging portion of the lifting / lowering cord 12. Even when the fully-enclosed rotation is performed, the lifting / lowering cord 12 and the warp 5b push the upper edge of the slat 4 in the direction of increasing the degree of rising, so that it is shielded (as compared to the case without the lifting / lowering cord 12). Improves.

  Also, as shown in FIGS. 17C and 17D, the lifting cords 11 and 13 and the slats 3 are arranged so that the weft yarns 6a and 6b do not intersect in plan view below the sixth stage of the hanging portion of the lifting cords 11 and 13, as shown in FIGS. (4) may be inserted into a common space, and the shielding performance is also improved by the presence of the lifting / lowering cords 11 and 13 between the slats 3 and 4 and the warp yarn 5a even during the normal fully closed rotation.

Of course, the shielding performance is also improved in the reverse fully closed rotation.
In the above-described embodiment, the lifting cords 11 to 13 are embodied as horizontal blinds that are wound around the lifting and lowering winding shafts 14a to 14c by the driving force of the motor. However, the present invention is not limited to this, and FIGS. As shown in FIG. 6, the cord equalizer 61 may be embodied by a horizontal blind of a type in which the lifting cords 11 to 13 are moved upward by pulling the cord equalizer 61 by hand.

Even if it is embodied in such a type of horizontal blind, it is possible to obtain the same effect as that of the above embodiment.
In the above-described embodiment, the upper and lower notch stages in which the elevating cords 11 to 13 are not inserted between the weft threads 6a and 6b and the notches 4a and 4b are provided at the front edge and the rear edge of the slat 4 are the uppermost stages. However, the number of stages provided with both notch stages may be appropriately changed to other stages depending on the width of the ladder cord and the width in the front-rear direction of the lift outlet 1b. For example, both notched steps may be provided from the uppermost stage to the fourth stage or from the uppermost stage to the seventh stage.

The technical idea that can be grasped from the above embodiment will be described below.
(B) In the bottom rail shape of a horizontal blind that has a hollow and substantially rectangular shape in cross section, the upper side is formed shorter than the lower side, the outer periphery is formed as a gentle curve on both the upper side and the lower side, and the lower side stands from the lower side toward the upper side. A bottom rail shape material characterized in that the rising wall is formed as a curve so as to be continuous with the curved surface on the outer periphery of the upper side.

(B) The bottom rail profile according to (a) above, wherein the tape holder can be engaged by providing projecting pieces projecting outward on the front and rear end edges of the lower side.
(C) The bottom rail profile according to (a) or (b) above, wherein the thickness of the central portion of the upper side is made thicker than the thickness of the lower side.

  DESCRIPTION OF SYMBOLS 1 ... Head box, 2 ... Ladder cord, 3, 4 ... Slat, 5a, 5b ... Warp, 6a, 6b, 31a-31d, 41a-41d, 51 ... Weft, 7, 42 ... Crossing part, 11-13 ... Lifting Code | symbol, 16 ... operating device, 19 ... bottom rail, 19a ... curved part.

Claims (4)

Multiple ladder slats are supported by a ladder cord supported suspended from the head box, and the slats can be rotated via the ladder cords by operating an operation device. In the horizontal blind that was made possible,
Constructing a plurality of wefts at each stage of the ladder cord, and having an insertion point where the slats are inserted between the wefts,
Bottom rail that is attached to the lower end of the ladder cord is state, and are not warp the ladder cord in the width direction across the bottom is fixed viewed from the longitudinal direction,
The cross-sectional shape is hollow, and includes an upper side, a lower side, and a wall that rises from both sides of the lower side toward the upper side,
In the inner circumference, the upper side between the walls is formed shorter than the length of the lower side,
In the outer periphery, the wall constitutes a curved portion by a curve, and the upper side and the lower side are curves that are looser than the curve of the wall, and are connected to the curve of the wall,
A horizontal blind in which a thickness of a central portion of the upper side between the inner periphery and the outer periphery is made thicker than a thickness of the lower side. The horizontal blind according to claim 1, wherein protrusions projecting outward are provided on the front and rear end edges of the lower side on the front and rear sides so that the tape holder can be engaged. When the slat is closed, the weft that supports the slat from below is loosened when the slat is open, and the weft located on the slat is stretched when the slat is open. The horizontal blind according to claim 1 or 2 . A bottom rail for a horizontal blind in which a lower end portion of a warp thread of a ladder cord is fixed to both lower portions in the width direction when viewed from the longitudinal direction ,
The cross-sectional shape is hollow, and includes an upper side, a lower side, and a wall that rises from both sides of the lower side toward the upper side,
In the inner circumference, the upper side between the walls is formed shorter than the length of the lower side,
In the outer periphery, the wall constitutes a curved portion by a curve, and the upper side and the lower side are curves that are looser than the curve of the wall, and are connected to the curve of the wall,
A horizontal blind bottom rail, wherein a thickness of a central portion of the upper side between the inner periphery and the outer periphery is made thicker than a thickness of the lower side.