JP2014062445A - Horizontal blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal blind with an excessively excellent shielding property.SOLUTION: A horizontal blind comprises: a plurality of ladder cords 5 which are suspended from a headbox 3; a bottom rail 7 which is arranged on lower ends of the ladder cords 5; a slat group 11 consisting of many stages of slats 9 which are supported by the ladder cords 5; a plurality of lifting cords 13 which are hung from the headbox 3 and support the bottom rail 7; and lifting means for lifting the bottom rail 7 by varying length of the lifting cords 13 between the headbox 3 and the bottom rail 7 from the side of the headbox 3, in which the lifting cords 13 are hung from the same or inside position in the longitudinal direction of the headbox 3 to positions where the ladder cords 5 are hung from the headbox 3, offset toward edges of the slats 9 as approaching the bottom rail 7, and the respective slats 9 of an upper slap group 11a are provided with holes 15 or notches 17 for reducing interference with inside hung lifting cords.

Description

  The present invention relates to a horizontal blind of a high shielding type.

  In the horizontal blind, the amount of solar radiation taken into the room is adjusted by moving up and down and tilting multiple slats supported by a ladder cord suspended from the head box.

  A bottom rail is arranged at the lower end of the ladder cord, and the slats are raised and lowered by raising and lowering the bottom rail by pulling the lifting cord attached to the bottom rail into the head box and pulling it out from the head box. Yes. In a general horizontal blind, an elevating cord insertion hole is provided at the center in the front-rear direction of each slat. The elevating cord is suspended from the head box, inserted into the elevating cord insertion hole, and connected to the bottom rail. ing.

  In such a type of horizontal blind, even if the slat is completely closed, solar radiation leaks through the lifting / lowering cord insertion hole, and satisfactory shielding may not be obtained.

  In order to solve such a problem, in Patent Document 1 or 2, the lifting / lowering cord is suspended from the head box to the bottom rail along the edge in the front-rear direction of the slat.

Japanese Utility Model Publication 3-35034 Japanese Utility Model Publication No. 64-33897

  In the configurations described in Patent Documents 1 and 2, since it is not necessary to provide the lifting / lowering cord insertion hole in the slat, the problem of solar radiation leakage through this hole is solved. However, in such a configuration, when the slat is fully closed, particularly in the upper stage portion of the slat, the lifted and lowered cord is placed on the outer side in the front-rear direction than the ladder cord. Is pulled by the lifting / lowering cord, and a force on the outside in the front-rear direction is applied. The force in this direction is a force in a direction to open the slat that is in the fully closed state, and as a result, the slat is slightly opened and the shielding performance is lowered.

  The present invention has been made in view of such circumstances, and provides a horizontal blind having extremely excellent shielding properties.

According to the present invention,
A plurality of ladder cords suspended from the head box;
A bottom rail disposed at the lower end of the ladder cord;
A slat group consisting of multiple slats supported by the ladder cord;
A plurality of lifting cords suspended from the head box and supporting the bottom rail;
Elevating means for elevating the bottom rail by changing the elevating cord length between the head box and the bottom rail from the head box side;
At least one lifting / lowering cord among the plurality of lifting / lowering cords is suspended from the same or inner position in the front / rear direction of the head box with respect to a position where the ladder cord is suspended from the head box, and is attached to the bottom rail. An internal hanging cord that is offset toward the edge of the slat as it approaches,
Each of the slats of the upper slat group composed of one or more slats close to the head box in the slat group is provided with a hole or a notch for reducing interference with the inner hanging lifting / lowering cord. Is provided.

  According to the present invention, the lifting / lowering cord is suspended toward the front / rear direction edge of the slat as the lifting / lowering cord hangs from the same position as or below the position where the ladder cord hangs from the head box and approaches the bottom rail. Characterized by dots. Further, the slat is provided with a hole or notch for reducing the interference between the lifting cord and the slat. When such a configuration is adopted, a force toward the center of the head box in the front / rear direction acts on the lifting / lowering cord in the vicinity of the head box. Decline can be prevented.

  Of the multiple slats, one or more of the slats on the side close to the headbox must be provided with holes or notches, so solar radiation may leak out from these parts, but such holes or notches are provided. Since only a few of the many slats are produced, the effect of solar radiation leakage due to such holes or notches is small and not a problem.

Hereinafter, various embodiments of the present invention will be exemplified. The various embodiments described below can be combined with each other.
Preferably, the inner hanging lifting / lowering cord is suspended from a position corresponding to a substantially center of the head box in the front-rear direction of the slat.
Preferably, the head box is provided with a lifting / lowering cord guide portion that defines a position where the inner hanging lifting / lowering cord is suspended from the head box.
Preferably, the hole or notch is formed in a range including the center in the front-rear direction in the uppermost slat.
Preferably, the depth of the hole or the notch provided in each slat of the upper slat group becomes shallower as the slat of the step away from the head box.
Preferably, each slat of the lower slat group including a plurality of slats arranged on the side farther from the head box than the upper slat group is provided with a notch having the same depth.
Preferably, the inner hanging lifting / lowering cord is disposed in the hole or notch.
Preferably, the inner hanging lifting / lowering cord is inserted between a pair of wefts provided between a pair of warp yarns of the ladder cord.
Preferably, the slat is inserted between a weft crossing portion where the pair of wefts intersect and one of the pair of warp yarns, and the inner hanging lifting / lowering cord includes the weft crossing portion and the pair of warp yarns. It is inserted between the other.
Preferably, all of the plurality of lifting / lowering cords are the inner hanging lifting / lowering cords.
Preferably, a part of the plurality of lifting / lowering cords is the inner hanging lifting / lowering cord, the rest is an outer hanging lifting / lowering cord, and the outer hanging lifting / lowering cord is located at a position lower than a position where the ladder cord is suspended from the head box. The head box is suspended from the outside in the front-rear direction, and is offset to the opposite side in the front-rear direction from the inner drooping lifting cord.
Preferably, the lifting / lowering cord and the ladder cord are respectively connected to the head box through an opening / lowering cord opening and a ladder cord opening provided in a moving member configured to be slidable in the front-rear direction with respect to the head box. The ladder cord opening is configured such that a force in the front and rear direction of the head box is applied to the moving member by the tension applied to the warp of the ladder cord as the slat rotates. The lifting / lowering cord opening is configured such that the force causes the moving member to apply a force in the front / rear inner direction of the head box to the outer hanging lifting / lowering cord.
Preferably, the pair of warp yarns of the ladder cord is attached to the winding drum in a state of being crossed in the front-rear direction of the head box.

It is a front view showing the whole horizontal blind composition concerning a 1st embodiment of the present invention. It is an enlarged view of the part enclosed with the dotted line in FIG. It is a top view which shows the positional relationship of the hole or notch provided in each slat, the raising / lowering cord, and the ladder cord. It is sectional drawing from the side which shows the state from which the raising / lowering cord hangs from the approximate center of the front-back direction, and is offset toward the edge of the front-back direction of a slat as it approaches a bottom rail, (a) is a slat fully open. State (b) shows the slats in the fully closed state It is a top view which shows the modification of FIG.3 (c). It is sectional drawing from the side which shows the modification of Fig.4 (a). It is sectional drawing from the side which shows another modification of Fig.4 (a). (A) is the schematic diagram which looked at the head box of the horizontal blind of 2nd Embodiment of this invention from the lower side, (b) and (c) are respectively the group A and group B in (a). It is sectional drawing from the side which shows the positional relationship of a raising / lowering cord and a ladder cord in the state which leveled the slat. It is sectional drawing from the side which shows the positional relationship of a raising / lowering cord and a ladder cord in the state which made the slat fully closed about the group B of 2nd Embodiment. (A)-(c) is a figure corresponding to Drawing 8 (a)-(c) about a horizontal blind of a 3rd embodiment of the present invention. (A)-(b) is a perspective view around the head box of Drawing 10 (b)-(c), respectively. (A)-(b) is the cross section from the side which shows the positional relationship of a raising / lowering cord and a ladder cord in the state which made the slat fully closed about the group A and the group B of 3rd Embodiment, respectively. FIG. (A)-(c) is a figure corresponding to Drawing 8 (a)-(c) about a horizontal blind of a 4th embodiment of the present invention. It is a figure corresponding to Drawing 9 about group B of a 4th embodiment.

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

1. First Embodiment FIG. 1 is a perspective view showing an overall configuration of a horizontal blind 1 according to a first embodiment of the present invention. FIG. 2 is an enlarged view of a portion surrounded by a dotted line in FIG. FIG. 3 is a plan view showing the positional relationship between the holes 15 or notches 17 provided in each slat 9, the lifting / lowering cord 13, and the ladder cord 5. FIG. 4 is a side cross-sectional view showing a state in which the lifting / lowering cord 13 is suspended from substantially the center in the front-rear direction and is offset toward the front-rear edge of the slat 9 as it approaches the bottom rail 7. 4A shows the slat 9 in a fully open state, and FIG. 4B shows the slat 9 in a fully closed state. 4 (a) and 4 (b), for convenience of illustration, the hole 15 or the notch 17 provided in the slat 9 is omitted, but in actuality, as shown in FIGS. A notch 17 is provided.

  A plurality of ladder cords 5 are suspended from the lower surface 3 a of the head box 3, and a bottom rail 7 is attached to the lower end of the ladder cord 5. The ladder cord 5 supports a slat group 11 including a plurality of slats 9. In FIG. 1, ten slats 9 are supported, but the number of slats 9 is appropriately determined depending on the height of the blinds, the width of the slats 9, the interval between the slats 9 in each stage, and the like. A plurality of lifting cords 13 are also suspended from the lower surface 3 a of the head box 3. In FIG. 1, the lifting / lowering cords 13 are arranged every other one with respect to the ladder cord 5, but the present invention is not limited to this, and the number of the lifting / lowering cords 13 may be smaller or larger than this. The lifting / lowering cords 13 may be arranged in the vicinity of each of the ladder cords 5. The lifting / lowering cord 13 is suspended from a position on the inner side in the front-rear direction of the head box 3 with respect to a position where the ladder cord 5 is suspended from the head box 3. More specifically, the lifting / lowering cord 13 is suspended from a position C corresponding to the approximate center of the head box 3 in the front-rear direction of the slat 9. And the raising / lowering cord 13 is offset toward the edge of the slat 9 in the front-back direction as it approaches the bottom rail 7.

  As shown in FIGS. 1 to 3, in order to reduce interference between the lifting / lowering cord 13 and the slat 9, each of the upper slat groups 11 a including one or more slats 9 close to the head box 3 among the slat groups 11. The slat 9 is provided with a hole 15 or a notch 17. In the embodiment of FIG. 1, an oval hole 15 is provided in a range including the center in the front-rear direction of the uppermost slat 9, and a notch 17 is formed in the second to sixth slats 9. Is provided. Whether each slat 9 is provided with a hole 15 or a notch 17 can be appropriately determined according to the width of the slat 9 or the like. For example, in FIG. 1, the hole 15 is provided only in the uppermost slat 9, and the notch 17 is provided in the lower slat 9, but when the width of the slat 9 is wider than this, two steps are provided. You may provide the hole 15 in the slat 9 after the eyes. When the width of the slat 9 is narrower than this, the uppermost slat 9 may be provided with a notch 17 instead of the hole 15. Further, the notches 17 need not be provided in the second and subsequent stages. Further, the number of steps in which the hole 15 or the notch 17 is provided is appropriately determined according to the width of the slat 9 or the like. In order to reduce interference with the lifting / lowering cord 13 as the width of the slat 9 increases, it is necessary to provide the holes 15 or the notches 17 in more steps.

  As shown in FIG. 3, the depth of the hole 15 or the notch 17 provided in the slat 9 of the upper slat group 11 a is shallower as the slat 9 in the step away from the head box 3. The closer the slat 9 is to the head box 3, the stronger the interference with the lifting / lowering cord 13. Therefore, it is necessary to increase the depth of the hole 15 or the notch 17. Since the interference is weakened, the depth of the hole 15 or the notch 17 can be reduced. By adopting such a configuration, it is possible to avoid excessive interference between the slat 9 and the lifting / lowering cord 13 while minimizing a decrease in shielding performance and a decrease in strength of the slat 9. In the present specification, as shown in FIG. 3A, the “hole depth” is the distance from the edge of the slat 9 on the side where the lifting / lowering cord 13 is offset to the farthest position of the hole 15. As shown in FIG. 3B, the “notch depth” means the distance from the edge of the slat 9 on the side where the lifting / lowering cord 13 is offset to the farthest position of the notch 17. means.

  Interference between the slats 9 and the lifting / lowering cord 13 is not strong with respect to the lower slat group 11b composed of a plurality of slats 9 arranged on the side farther from the head box 3 than the upper slat group 11a. From the viewpoint, it is not necessary to provide the notch 17. However, for the purpose of preventing misalignment of the slats 9, the notches 17 may be provided also in the slats 9 of the lower slat group 11 b and the elevating cord 13 may be disposed in the notches 17. In this case, the notch 17 of each slat 9 can be made the same depth.

  The ladder cord 5 is composed of a pair of warp yarns 5a and a large number of pairs of weft yarns 5b provided therebetween. Slats 9 are inserted between each pair of wefts 5b. The positional relationship between the lifting / lowering cord 13 and the ladder cord 5 is not particularly limited. In the present embodiment, in the uppermost stage, the lifting / lowering cord 13 is inserted between the pair of weft threads 5b of the ladder cord 5, and in the second stage, it is not inserted between the pair of weft threads 5b. In the third and subsequent stages, the slats 9 are inserted between the weft crossing portion 5c where the pair of wefts 5b intersect and one of the pair of warp yarns 5a, and the elevating cord 13 includes the weft crossing portion 5c and the pair of warp yarns. It is inserted between the other of 5a (this arrangement is called "cross arrangement"). In this way, the cross arrangement makes it possible to prevent contact between the lifting / lowering cord 13 and the notch 17 and prevent the lifting / lowering cord 13 from being damaged by friction. In the cross arrangement, since the weft crossing portion 5c exists between the notch 17 and the lifting / lowering cord 13, the lifting / lowering cord 13 and the notch 17 are always separated from each other, and the lifting / lowering cord 13 intersects the warp 5a and the weft. Since it can move only within a small loop between the portions 5c, the lifting / lowering cord 13 and the warp yarn 5a move almost integrally. Due to such a configuration, the notch 17 and the warp 5a are always necessarily separated from each other, and even if the slat is raised with the notch 17 facing downward, the warp 5a is caught by the notch 17. Cannot occur. In another embodiment, as shown in FIG. 5, the lifting / lowering cord 13 may be inserted between the pair of weft yarns 5b without crossing the pair of weft yarns 5b in plan view (such an arrangement). Called “straight arrangement”).

  The reason why the lifting cord 13 is not inserted between the pair of wefts 5b in the second-stage slat 9 is to prevent the warp 5a from being pulled by the lifting cord 13 and hindering the tilt of the slat 9. . Depending on the width of the slats 9 and the like, the lifting / lowering cord 13 may not be inserted between the pair of wefts 5b even after the third stage. In the second stage, the lifting / lowering cord 13 may be inserted between the pair of wefts 5b in a straight arrangement. In the straight arrangement, the warp yarn 5a is not restrained by the lifting / lowering cord 13 as compared to the cross arrangement, and therefore, even if the lifting / lowering cord 13 is inserted between the pair of weft yarns 5b, the tilt of the slat 9 is not easily inhibited. Further, the elevating cord 13 may be inserted through a small ring (pico) provided in the ladder cord 5.

  As shown in FIGS. 4A and 4B, in this embodiment, the lifting / lowering cord 13 is a lifting / lowering guide portion (not shown) disposed at a position corresponding to the approximate center of the head box 3 in the front-rear direction of the slat 9. Example: pulley) It is positioned at 19 and is wound on a winding drum 21. With such a configuration, by rotating the winding drum 21, the bottom rail 7 can be raised and lowered by changing the length of the lifting cord between the head box 3 and the bottom rail 7. The winding drum 21 can be rotated by rotating the drive shaft 22. The method for rotating the drive shaft 22 is not particularly limited, and an operation cord is hung on a pulley fixed to the drive shaft 22 so as not to rotate, and the pulley is rotated by pulling the operation cord to rotate the drive shaft 22. The drive shaft 22 may be rotated using an electric motor. In the present invention, the lifting / lowering means is not limited to the winding drum type lifting / lowering means as shown in FIG. 4, and the lifting / lowering cord 13 inserted into the head box 3 through the lifting / lowering cord guide portion 19 is connected to the head box 3. It may be a so-called direct pulling type lifting and lowering means that pulls out from another position and raises and lowers the bottom rail 7 by changing the pulling amount.

  4A and 4B, the head box side end of the warp 5a of the ladder cord 5 is attached to a suspension ring 23 attached to the winding drum 21. Since the suspension ring 23 rotates together with the winding drum 21 within a predetermined movable range, the warp 5 a is pulled by the rotation of the winding drum 21 and the slat 9 is tilted. If the hole 15 or the notch 17 is not provided in the slat 9, the interference between the lifting / lowering cord 13 and the slat 9 becomes very strong in the upper slat group 11a, so that the slat 9 as shown in FIG. When the slat 9 is fully opened as shown in FIG. 4A from the fully closed state, the smooth tilt of the slat 9 is inhibited. In this embodiment, the slat 9 is provided with the hole 15 or the notch 17. Since the interference between the lifting / lowering cord 13 and the slat 9 is reduced, the slat 9 can be smoothly tilted.

  As is clear from FIGS. 4A and 4B, in this embodiment, the lifting / lowering cord 13 is suspended from a position C corresponding to the approximate center of the slat 9 in the front-rear direction. It is possible to prevent the shielding performance from being lowered by pulling the cord 5 outward in the front-rear direction of the slat 9, and to obtain a horizontal blind having an extremely excellent shielding performance.

  Further, the position where the lifting / lowering cord 13 is suspended from the head box 3 is not limited to the position C, and the position of the head box 3 is more than the position A where the ladder cord 5 is suspended from the head box 3 as shown in FIG. It may be an arbitrary position inside the front-rear direction, and may be the same as the position A where the ladder cord 5 is suspended from the head box 3 as shown in FIG.

  Further, in the embodiment shown in FIG. 1, all of the plurality of lifting / lowering cords 13 are suspended from a position inside the front / rear direction of the head box 3 with respect to a position where the ladder cord 5 is suspended from the head box 3. In another embodiment, it is sufficient that at least one lifting / lowering cord 13 has such a configuration, and the remaining lifting / lowering cords 13 are suspended from the head box 3 at positions outside the ladder cord 5 in the front-rear direction. May be.

2. Second Embodiment Next, a horizontal blind according to a second embodiment of the present invention will be described with reference to FIGS. The horizontal blind according to this embodiment is similar to the first embodiment, but in this embodiment, a part of the lifting / lowering cord 13 is suspended from the position in the front / rear direction of the head box 3 with respect to the ladder cord 5, The remaining lifting / lowering cords are characterized in that they are suspended from positions outside the ladder cord 5 in the front-rear direction of the head box 3.
This will be specifically described below.

  FIG. 8A is a schematic view of the lower surface 3a of the head box 3 as viewed from below. FIG. 8A shows three sets of the lifting / lowering cord 13 and the ladder cord 5 (two sets A and one set B). 8B and 8C are side sectional views showing the positional relationship between the lifting / lowering cord 13 and the ladder cord 5 in the state where the slats 9 are horizontal with respect to the sets A and B, respectively. It is. FIG. 9 is a side cross-sectional view showing the positional relationship between the lifting / lowering cord 13 and the ladder cord 5 in the state where the slat 9 is fully closed for the group B.

  In the set B, the lifting / lowering cord 13 is suspended from the position inside the front / rear direction of the head box 3 relative to the ladder cord 5, and in the set A, the lifting / lowering cord 13 is hung from the ladder cord 5 in the front / rear direction The set A and the set B are alternately arranged. That is, the lifting / lowering cords 13 of the set A and the set B are an outer drooping lifting / lowering cord and an inner drooping lifting / lowering cord, respectively. On the lower surface 3 a of the head box 3, a support member 25 provided with a lifting cord opening 13 a for inserting each set of the lifting cord 13 and the ladder cord 5 and a ladder cord opening 5 d is disposed. The winding drum 21 is rotatably supported by the support member 25, and the lifting / lowering cord 13 and the ladder cord 5 are attached to the winding drum 21 through the openings 13a and 5d.

  More specifically, in the group B, the lifting / lowering cord 13 is positioned by a lifting / lowering cord guide portion (eg, pulley) 19 disposed substantially at the center in the front-rear direction of the head box 3 and wound around the winding drum 21. As a result, it is introduced into the head box 3 through the inner side of the head box 3 in the front-rear direction than the ladder cord 5. On the other hand, in the set A, the lifting / lowering cord 13 is wound around the winding drum 21 without contacting the lifting / lowering cord guide portion 19. The ladder cord 5 is introduced into the head box 3 while being pushed inward in the front-rear direction of the head box 3 by the inner wall surface of the ladder cord opening 5d. The ladder cord 5 is introduced into the head box 3 through the outside of the head box 3 in the front-rear direction. In addition, the lifting / lowering code guide portion 19 is also provided in the support member 25 for the set A. This is because the support member 25 for the set A and the support member 25 for the set B are used as common parts. The support member 25 for the set A may not have the lifting / lowering cord guide portion 19.

  As shown in FIG. 8C, in order to avoid interference between the lifting / lowering cord 13 of the group B and the slats 9 at a position close to the head box 3, several slats 9 closer to the head box 3 are provided. Is provided with a deep notch 17. The depth of the notch 17 becomes shallower as the distance from the head box 3 increases. As described in the first embodiment, a hole 15 for avoiding interference may be provided instead of the notch 17. Further, it is not necessary to provide either the notch 17 or the hole 15 in the slat 9 that is located sufficiently away from the head box 3. Further, in this embodiment, in order to prevent the position of the ladder cord 5 from fluctuating when the slat 9 is raised, a ring 26 surrounding the lifting / lowering cord 13 and the ladder cord 5 is provided at a position close to the head box 3. However, the ring 26 can be omitted.

  Further, as shown in FIG. 8B, the lifting / lowering cord 13 of the group A does not interfere with the slat 9 even at a position close to the head box 3. Therefore, it is not necessary to provide the notch 17 or the hole 15 at the position where the lifting / lowering cord 13 of the group A passes. In the present embodiment, in order to prevent the slats 9 from slipping with respect to the lifting / lowering cord 13, a notch 17 in which the lifting / lowering cord 13 is accommodated is provided. However, the notch 17 can be omitted. Further, the lifting / lowering cord 13 may be inserted between the pair of wefts 5b in the cross arrangement described above.

  Referring to FIG. 9, also in the present embodiment, when the slat 9 is fully closed, the lifting / lowering cord 13 is inside the ladder cord 5, so that the lifting / lowering cord 13 does not pull the ladder cord 5 to the outside and is highly shielded. Sex can be achieved. In the first embodiment, since all the lifting / lowering cords 13 are suspended from the inner side of the ladder cord 5, the deep cutouts 17 or the holes 15 for avoiding interference with the respective lifting / lowering cords 13 are necessary. In the present embodiment, since the ascending / descending cord 13 of the set A does not require such a deep cutout 17 or hole 15, the shielding performance is improved accordingly.

  In the present embodiment, the form in which the set A and the set B are continuously arranged is shown, but a ladder cord may be further provided between the set A and the set B. Further, the set A and the set B do not necessarily have to be alternated, and may be arranged as, for example, the set A, the set B, the set B, and the set A.

3. Third Embodiment Next, a horizontal blind according to a third embodiment of the present invention will be described with reference to FIGS. The horizontal blind according to the present embodiment is similar to the second embodiment, but in this embodiment, the movable member 27 slidable in the front-rear direction (direction of arrow D) of the head box 3 slides on the support member 25. It is supported so as to be movable, and is characterized in that openings 13 a and 5 d through which the lifting and lowering cord 13 and the ladder cord 5 are inserted are provided in the moving member 27.
This will be specifically described below.

  A pair of warp yarns 5a of the ladder cord 5 are inserted through the ladder cord opening 5d. A pair of warp 5a is comprised by indoor side warp 5aa and outdoor side warp 5ab. As shown in FIGS. 10B to 10C, when the slat 9 is in a horizontal state, the indoor warp 5aa applies a force in the indoor direction to the inner wall surface of the opening 5d, and the outdoor warp 5ab Since the forces in the outdoor direction are applied to the inner wall surface of the opening 5d and these forces are balanced, the moving member 27 does not move while being positioned just below the winding drum 21.

  As shown in FIGS. 12A to 12B, when the winding drum 21 is rotated in the direction of the arrow X, the tension applied to the indoor warp 5aa becomes larger than the tension applied to the outdoor warp 5ab, Accordingly, the force applied by the indoor warp 5aa to the moving member 27 is greater than the force applied by the outdoor warp 5ab to the moving member 27, and as a result, the moving member 27 moves in the indoor direction (arrow Y).

  As shown in FIGS. 10 (a) to 10 (b) and FIG. 11 (a), is the lifting / lowering cord 13 of the set A in contact with the inner wall surface of the lifting / lowering cord opening 13a when the slats 9 are horizontal? Therefore, when the moving member 27 moves in the direction of the arrow Y, the inner wall surface of the opening 13a comes into contact with the lifting / lowering cord 13 of the group A, and the force in the direction of the arrow Y is applied to the lifting / lowering cord 13. Add and move.

  As described above, in this embodiment, when the slat 9 is fully closed, the lifting cord 13 of the set A is naturally moved to the indoor side, whereby the lifting cord 13 and the ladder cord 5 of the set A are moved. The distance is shortened. As a result, the force with which the outdoor warp yarn 5ab is pulled to the outdoor side is weakened, and the shielding performance is further improved. Further, since the direction of the indoor warp 5aa approaches the vertical when the slat 9 is fully closed, the angle of the slat 9 also approaches the vertical, and the shielding performance is further improved from this viewpoint.

  Since the lifting / lowering cord 13 is difficult to move when a load is applied to the lifting / lowering cord 13, the bottom rail 7 is lowered to the lower limit and the slat 9 is rotated while most of the load is applied to the ladder cord 5. It is preferable to make it.

  In this embodiment, the warp 5aa is an indoor warp and the warp 5ab is an outdoor warp, but the warp 5aa may be an outdoor warp and the warp 5ab may be an indoor warp. In other words, in this embodiment, in FIGS. 10B and 10C, it is assumed that the right side is the indoor side, but the left side may be the indoor side.

4). 4th Embodiment Next, the horizontal blind of 4th Embodiment of this invention is demonstrated using FIGS. 13-14.
The horizontal blind according to this embodiment is similar to the first embodiment, but in this embodiment, a pair of warp yarns 5a of the ladder cord 5 are disposed in the front-rear direction via a ladder cord guide portion (example: pulley) 29. It is characterized in that it is crossed and attached to the winding drum 21. With this configuration, as shown in FIG. 14, when the slat 9 is fully closed, a force in the direction indicated by the arrow X is applied to the indoor warp yarn 5aa of the ladder cord 5, thereby closing the slat 9 more securely. Thus, the shielding property is improved.

  Various features described so far in the first to fourth embodiments can be combined with each other.

1: horizontal blind, 3: head box, 5: ladder cord, 5a: warp, 5aa: indoor warp, 5ab: outdoor warp, 5b: weft, 7: bottom rail, 9: slat, 11: slat group, 11a : Upper slat group, 11b: Lower slat group, 13: Lifting cord, 15: Hole, 17: Notch, 19: Lifting cord guide part, 21: Winding drum, 22: Drive shaft, 23: Suspension ring, 25 : Support member, 26: ring, 27: moving member, 29: ladder code guide part

Claims (13)

A plurality of ladder cords suspended from the head box;
A bottom rail disposed at the lower end of the ladder cord;
A slat group consisting of multiple slats supported by the ladder cord;
A plurality of lifting cords suspended from the head box and supporting the bottom rail;
Elevating means for elevating the bottom rail by changing the elevating cord length between the head box and the bottom rail from the head box side;
At least one lifting / lowering cord among the plurality of lifting / lowering cords is suspended from the same or inner position in the front / rear direction of the head box with respect to a position where the ladder cord is suspended from the head box, and is attached to the bottom rail. An internal hanging cord that is offset toward the edge of the slat as it approaches,
Each of the slats of the upper slat group composed of one or more slats close to the head box in the slat group is provided with a hole or a notch for reducing interference with the inner hanging lifting / lowering cord. . The horizontal blind according to claim 1, wherein the inner hanging lifting / lowering cord is suspended from a position corresponding to a substantially center of the head box in the front-rear direction of the slat. The horizontal blind according to claim 1 or 2, wherein the head box is provided with a lifting / lowering cord guide portion that defines a position where the inner hanging / falling cord is suspended from the head box. The horizontal blind according to any one of claims 1 to 3, wherein the hole or notch is formed in a range including the center in the front-rear direction in the uppermost slat. The horizontal blind according to any one of claims 1 to 4, wherein a depth of a hole or a notch provided in each slat of the upper slat group becomes shallower as a slat in a step away from the head box. 6. The notch having the same depth is provided in each slat of the lower slat group including a plurality of slats arranged on the side farther from the head box than the upper slat group. The horizontal blind according to one. The horizontal blind according to any one of claims 1 to 6, wherein the inner hanging cord is disposed in the hole or notch. The horizontal blind according to any one of claims 1 to 7, wherein the inner hanging lifting / lowering cord is inserted between a pair of wefts provided between a pair of warp yarns of the ladder cord. The slat is inserted between a weft intersection where the pair of wefts intersect and one of the pair of warps,
The horizontal blind according to claim 8, wherein the inner hanging lifting / lowering cord is inserted between the weft crossing portion and the other of the pair of warp yarns. The horizontal blind according to any one of claims 1 to 9, wherein all of the plurality of elevating cords are the inner hanging elevating cords. A part of the plurality of lifting / lowering cords is the inner hanging lifting / lowering cord, the rest is an outer hanging lifting / lowering cord, and the outer hanging lifting / lowering cord is located at a position higher than the position where the ladder cord is suspended from the head box. The horizontal blind according to any one of claims 1 to 9, wherein the horizontal blind is suspended from an outer side in a front-rear direction of the box and is offset to an opposite side in the front-rear direction from the inner hanging cord. The elevating cord and the ladder cord are respectively introduced into the head box through an elevating cord opening and a ladder code opening provided in a moving member configured to be slidable in the front-rear direction with respect to the head box. And
The ladder cord opening is configured such that a force in the front and rear direction of the head box is applied to the moving member by tension applied to the warp of the ladder cord as the slat rotates.
The horizontal blind according to claim 11, wherein the lifting / lowering cord opening is configured such that the force causes the moving member to apply a force in the front / rear inner direction of the head box to the outer hanging lifting / lowering cord. The horizontal blind according to any one of claims 1 to 12, wherein the pair of warp yarns of the ladder cord is attached to a take-up drum in a state of being crossed in the front-rear direction of the head box.