JP2018053582A - Horizontal window blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal window blind which can improve the horizontality related to the vertical movement of a bottom rail, which can be caused by the repetition of ascending and descending operations of lifting cords having different lengths.SOLUTION: A horizontal window blind according to the present invention includes a plurality of lifting cords 10L, 10M, and 10R of different lengths, and among the plurality of lifting cords 10L, 10M, and 10R, the elongation amount at the time of initial installation of at least the lift cord 10R having the shortest length is set to be smaller than the elongation amount at the initial installation of the lifting cord 10L having the longest length. In addition, a bottom rail 5 suspended and supported by the plurality of lifting cords 10L, 10M, and 10R is initially inclined in advance so as to be higher toward an operating portion side.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a horizontal blind that guides the movement of an elevating cord.

  The horizontal blind can adjust the amount of solar radiation taken into the room by raising and lowering or tilting multiple slats supported by a ladder cord suspended from the head box.

  For example, the bottom rail is arranged at the lower end of the ladder cord, and the slat is moved up and down by pulling the lifting cord attached to the bottom rail into the head box and pulling it out from the head box. Can be made.

  One type of such a horizontal blind is a hand-operated operation for moving the lifting / lowering cord. In this horizontal blind, the other end of each of the plurality of lifting cords having one end attached to the bottom rail is led out from the vicinity of the end in the head box to the outside of the head box through the cord outlet.

  Note that when the other end of each lifting / lowering cord is led out to the outside of the head box, there are some that lead out to the outside of the head box via a tilt operating rod connected to the operating portion. In this operation unit, a gear mechanism is disposed in the head box. The input shaft of the gear mechanism protrudes from the opening provided in the head box to the outside of the head box, and a tilt operation rod is connected to the tip of the input shaft. The angle of the slat can be adjusted by rotating the tilt operation rod. This input shaft also serves as a code outlet for the lifting cord from the head box.

  In particular, a configuration is known in which the ends of a plurality of lifting cords led out via the operation unit are guided into the tilt operation rod and connected to a knob at the lower end of the tilt operation rod (for example, Patent Documents). 1).

  And if the raising / lowering cord or the knob is operated and the raising / lowering cord is pulled out from the head box, the bottom rail is pulled up and the slat rises.

  In a horizontal blind that guides the movement of the lifting / lowering cord through such a tilt operating rod, the slat is lowered by the weight of the bottom rail and the slat. For this reason, a stopper device for locking the movement of the lifting / lowering cord is provided in the head box.

  Accordingly, if the pulling operation of the lifting / lowering cord is stopped, the stopper device is activated, and the slat and the bottom rail are prevented from falling by their own weight. Further, when the operation of the stopper device is released, the slat and the bottom rail descend based on their own weight.

  By the way, when the stopper device is deactivated, the slat is lowered by its own weight by the bottom rail and the slat, and the slat is lowered at an appropriate speed with respect to the horizontal blind that raises the slat by operating the movement of the lifting / lowering cord. There is known a technique of providing a brake device so as to be able to perform the above (see Patent Documents 2 and 3, for example).

  Such a brake device functions as a speed adjusting device that limits the moving speed of the lifting / lowering cord and brakes the moving speed when the slat is lowered to a certain value or less. Only decelerate and brake force can be applied to decelerate and lower the bottom rail and slat.

  By installing this speed adjusting device, when the bottom rail and the slat are lowered due to their own weight by releasing the operation of the stopper device, it is possible to reduce the falling sound and the collision sound with the floor surface of the bottom rail.

JP 2000-314283 A JP-A-2005-30084 Japanese Patent Laid-Open No. 10-140950

  In the above-described horizontal blind that guides the movement of the lifting / lowering cord, a plurality of lifting / lowering cords are guided in the head box and suspended separately from different positions of the head box. It will be a thing. In addition, the normal raising / lowering cord is constructed by knitting ultrafine synthetic fibers.

  However, in horizontal blinds having a plurality of lifting cords with different lengths, when the same load (bottom rail) is applied to each lifting cord, due to the difference in load per unit length of each lifting cord, The shorter the lifting cord, the larger the elongation. For this reason, the extension amount of the lifting / lowering cord changes with time depending on the load. Therefore, as the usage frequency of the lifting / lowering operation of the lifting / lowering cord increases, the horizontality of the bottom rail is not maintained due to the lifting / lowering cord extending, and when the bottom rail is lifted or when the bottom rail is lowered A single drop occurs.

  In particular, when a speed adjusting device is provided in the head box to limit the moving speed of the lifting / lowering cord and brake the moving speed when the slat is lowered to a certain value or less, the slat and the bottom rail are relatively gently moved. Since it descends, the lowering of the bottom rail becomes conspicuous and there is a problem that the dynamic design is impaired.

  In view of the above-described problems, an object of the present invention is to provide a horizontal blind that can improve the horizontality related to the lifting / lowering operation of the bottom rail that can be caused by repeated lifting / lowering operations of lifting / lowering cords having different lengths.

  The horizontal blind according to the first aspect of the present invention is a horizontal blind having a plurality of lift cords having different lengths, and at least the lift cord of the shortest length among the plurality of lift cords is different from other lift cords. Characteristic code.

  Further, in the horizontal blind according to the first aspect of the present invention, the amount of elongation at the time of initial installation of the at least shortest lifting cord is the amount of elongation at the time of initial installation of the longest lifting cord among the plurality of lifting cords. It is characterized by being smaller than.

  The horizontal blind according to the first aspect of the present invention is characterized by further comprising a speed adjusting device that limits the moving speed of the plurality of lifting cords and brakes the moving speed when the slat is lowered to a predetermined value or less.

  In the horizontal blind according to the first aspect of the present invention, the at least shortest lifting cord is composed of a stretch cord that has been stretched with a predetermined load applied in advance.

  Further, in the horizontal blind according to the first aspect of the present invention, the regulation as to whether or not the at least shortest lifting cord is the stretch cord is selected according to the width and height of the horizontal blind. And

  The horizontal blind according to the first aspect of the present invention is characterized in that the at least shortest-length raising / lowering cord is composed of a low-stretch cord having a small extension amount per unit length in advance.

  Further, in the horizontal blind according to the first aspect of the present invention, the regulation as to whether or not the at least shortest lifting / lowering cord is the low-extension cord is selected according to the width and height of the horizontal blind. It is characterized by.

  Also, in the horizontal blind according to the first aspect of the present invention, the bottom rail suspended and supported by each of the plurality of lifting cords has a weight ratio that is asymmetric in the left-right direction so as to be heavy on the operation unit side. And

  In the horizontal blind according to the first aspect of the present invention, the weight ratio of the bottom rail is selected according to the width and height of the horizontal blind.

  In the horizontal blind according to the first aspect of the present invention, the bottom rail that is suspended and supported by each of the plurality of lifting / lowering cords is initially installed with an inclination in advance so as to be higher toward the operation unit side. And

  In the horizontal blind according to the first aspect of the present invention, the height adjustment of the bottom rail that is initially installed by inclining is selected according to the width and height of the horizontal blind.

  Furthermore, the horizontal blind according to the second aspect of the present invention is a horizontal blind having a plurality of elevating cords having different lengths, and the bottom rail suspended by the plurality of elevating cords becomes higher toward the operation unit side. In such a case, it is preliminarily inclined and is initially installed.

  The horizontal blind according to the second aspect of the present invention is characterized by further comprising a speed adjusting device that limits the moving speed of the plurality of lifting cords and brakes the moving speed when the slat is lowered to a predetermined value or less.

  According to the present invention, it is possible to improve the horizontality related to the lifting and lowering operation of the bottom rail by repeating the lifting and lowering operation of the lifting cords having different lengths.

It is a front view which shows schematic structure of the horizontal blind of one Embodiment by this invention. (A) is a front view schematically showing an ascending operation after a predetermined number of elevating operations in a conventional horizontal blind, and (b) is a descending operation after elapse of a predetermined elevating operation in a conventional horizontal blind. FIG. BRIEF DESCRIPTION OF THE DRAWINGS (a) is a front view which shows schematic structure of Example 1 about the horizontal blind of one Embodiment by this invention, (b) has passed the predetermined raising / lowering operation frequency in the horizontal blind of Example 1 which concerns on this invention. It is a front view which shows the raising / lowering operation | movement later. It is explanatory drawing regarding the elongation amount of the raising / lowering cord by the stretch cord applicable to the horizontal blind of Example 1 which concerns on this invention. (A) is a front view which shows schematic structure of Example 2 about the horizontal blind of one Embodiment by this invention, (b) has passed the predetermined raising / lowering operation frequency in the horizontal blind of Example 2 which concerns on this invention. It is a front view which shows the raising / lowering operation | movement later. (A) is a front view which shows schematic structure of Example 3 about the horizontal blind of one Embodiment by this invention, (b) has passed the predetermined raising / lowering operation frequency in the horizontal blind of Example 3 which concerns on this invention. It is a front view which shows the raising / lowering operation | movement later. (A) is a front view which shows schematic structure of Example 4 about the horizontal blind of one Embodiment by this invention, (b) has passed the predetermined raising / lowering operation frequency in the horizontal blind of Example 4 which concerns on this invention. It is a front view which shows the raising / lowering operation | movement later. (A) is a front view which shows schematic structure of Example 5 about the horizontal blind of one Embodiment by this invention, (b) has passed the predetermined raising / lowering operation frequency in the horizontal blind of Example 5 which concerns on this invention. It is a front view which shows the raising / lowering operation | movement later.

  Hereinafter, a horizontal blind according to an embodiment of the present invention will be described with reference to the drawings. In the specification of the present application, the upper side (or upper side) and the lower side (or lower side) of the horizontal blind shown in FIG. The left direction in the figure is defined as the left side of the horizontal blind, and the right direction in the figure is defined as the right side of the horizontal blind. In the example described below, the side to be visually recognized is the front side (or the indoor side) and the opposite side is the rear side (or the outdoor side) with respect to the front view of the horizontal blind shown in FIG.

(overall structure)
FIG. 1 is a front view showing a schematic configuration of a horizontal blind according to an embodiment of the present invention. In the horizontal blind according to the present embodiment, a multi-stage slat 4 is suspended and supported by a ladder cord 9 suspended from both the left and right sides and the center of the head box 1, and a bottom rail 5 is provided at the lower end of the ladder cord 9. Suspended and supported. The head box 1 is fixed to a mounting surface such as a ceiling surface via a plurality of brackets 6.

  Further, the lifting / lowering cords 10L and 10R hang down alongside the ladder cord 9 on the left and right sides of the head box 1 and the lifting / lowering cord 10M along with the indoor ladder cord 9 at the center of the head box 1. Is suspended, and the bottom rail 5 is attached to the lower ends of the lifting cords 10L, 10M, and 10R.

  A support member 13 that supports the ladder cord 9 and the lifting / lowering cords 10L, 10M, and 10R is disposed in the head box 1, and a hexagonal bar-shaped drive shaft 12 is inserted into the support member 13.

  A tilt drum 13a for attaching the upper end of the ladder cord 9 is rotatably supported by the support member 13, and the drive shaft 12 is inserted into the tilt drum 13a so as not to be relatively rotatable. Therefore, when the drive shaft 12 is rotated, the tilt drum 13a is rotated, and the angles of the multi-stage slats 4 suspended and supported by the ladder cord 9 are adjusted in phase. The support member 13 is preferably provided with a turning pulley 13b for turning the other ends of the lifting / lowering cords 10L, 10M, and 10R that attach one end to the bottom rail 5 to guide the other end in the longitudinal direction in the head box 1. It is.

  An operation unit 3 is provided on the right end side in the head box 1. The other end of each of the plurality of lifting cords 10L, 10M, 10R having one end attached to the bottom rail 5 is guided to the right end side in the head box 1 via the support member 13, and the stopper device 14 and speed adjustment are performed. After passing through the device 15, it is guided to the operation unit 3 and led out to the outside of the head box 1 through this operation unit 3.

  The operation unit 3 is provided with a gear mechanism (not shown) in the head box 1. The input shaft 3a of the gear mechanism protrudes from the opening provided in the head box 1 to the outside of the head box 1, and the tilt operation rod 2 is connected to the tip of the input shaft 3a. The input shaft 3a also serves as a cord outlet for the lifting cords 10L, 10M, and 10R from the head box 1.

  A tilt operation grip 7 for operating the rotation of the tilt operation rod 2 is attached to the end of the tilt operation rod 2, and the rotation of the tilt operation rod 2 is transmitted to the rotation of the drive shaft 12. Therefore, by rotating the tilt operation grip 7, the rotation is transmitted to the drive shaft 12, and the angles of the multi-stage slats 4 supported by the ladder cord 9 through the support member 13 are adjusted. it can.

  The plurality of lifting / lowering cords 10L, 10M, and 10R guided in the head box 1 are led out from the input shaft 3a through a code guide path (not shown) formed in the operation unit 3, and are operated by a tilt operation rod. 2 and after being inserted into the tilt operation grip 7, the lower end portion of the tilt operation grip 7 is connected to the knob 8.

  And if the raising / lowering cord 10L, 10M, 10R is pulled out from the head box 1 by operating the said knob 8, the bottom rail 5 will be pulled up and the slat 4 will raise. The tilt operation rod 2 is provided with a cord hook 11, and the lifting / lowering cords 10L, 10M, 10R are hooked on the cord hook 11 to improve the handling convenience.

  In the horizontal blind that guides the movement of the lifting / lowering cord through the tilt operation rod, the slat 4 is lowered by the weight of the bottom rail 5 and the slat 4. Therefore, a stopper device 14 that locks the movement of the lifting / lowering cords 10L, 10M, and 10R is provided in the head box 1. In this example, the stopper device 14 is disposed between the operation unit 3 in the head box 1 and the support member 13 that supports the lifting / lowering cord 10R, but depending on the arrangement of the lifting / lowering cords 10L, 10M, and 10R. The operation unit 3 in the head box 1 may not be between the support member 13 that supports the lifting / lowering cord 10R, but between the support members 13 that respectively support the lifting / lowering cords 10R and 10M, or the input shaft 13a side of the operation unit 13 It can also be provided.

  Therefore, if the pulling-out operation of the lifting / lowering cords 10L, 10M, 10R is stopped, the stopper device 14 is actuated to prevent the slat 4 and the bottom rail 5 from falling by their own weight. Further, when the operation of the stopper device 14 is released, the slat 4 and the bottom rail 5 descend based on their own weight.

  By releasing the operation of the stopper device 14 as described above, the slat 4 can be lowered by its own weight by the weight of the bottom rail 5 and the slat 4, and the slat 4 can be raised by operating the movement of the elevating cords 10L, 10M, 10R. In the horizontal blind in the present embodiment, the lifting / lowering cords 10L and 10M are provided between the operation unit 3 in the head box 1 and the support member 13 supporting the lifting / lowering cord 10R so that the slat 4 can be lowered at an appropriate speed. , 10R is provided to limit the moving speed and brake the moving speed when the slat 4 is lowered to a certain value or less. By providing this speed adjusting device 15, the bottom rail 5 and the slat 4 can be lowered by decelerating only when descending and using the braking force to decelerate.

  By installing the speed adjusting device 15, when the bottom rail 5 and the slat 4 are lowered due to their own weight by releasing the operation of the stopper device 14, it is possible to reduce the descending sound and the collision sound with the floor surface of the bottom rail 5. it can.

  By the way, in the horizontal blind that guides the movement of the lifting / lowering cords 10L, 10M, and 10R, a plurality of the lifting / lowering cords 10L, 10M, and 10R are guided in the head box 1 and suspended separately from different positions of the head box 1. Therefore, the lift cords 10L, 10M, and 10R have different lengths. In addition, the normal raising / lowering cord is constructed by knitting ultrafine synthetic fibers.

  However, in the conventional horizontal blind constructed using such a normal lifting / lowering cord, when the same load (bottom rail 5) is applied to the lifting / lowering cords 10L, 10M, and 10R, the lifting cords 10L, 10M, Due to the difference in load per unit length of 10R, the shorter the lifting cord, the greater the elongation. For this reason, the amount of elongation of a normal lifting / lowering cord changes with time depending on the load.

  In the conventional horizontal blind, the horizontality of the bottom rail 5 is maintained due to the extension of the lifting / lowering cords 10L, 10M, and 10R as the usage frequency of the lifting / lowering cords 10L, 10M, and 10R increases. Instead, the bottom rail 5 rises upward (see FIG. 2A) or the bottom rail 5 descends downward (see FIG. 2B).

  In particular, when a speed adjusting device 15 is provided in the head box 1 for limiting the moving speed of the lifting / lowering cords 10L, 10M, and 10R and braking the moving speed when the slat 4 is lowered to a certain value or less, the comparison is made. Since the slat 4 and the bottom rail 5 are gradually lowered, the lowering of the bottom rail 5 becomes conspicuous and the dynamic design is impaired.

  Therefore, in the horizontal blind according to the present invention, the bottom rail 5 can be lifted / lowered by repeating the lifting / lowering operation of the lifting / lowering cords 10L, 10M, and 10R having different lengths by adopting the configuration of each embodiment described below. Improve horizontality related to

Example 1
FIG. 3A is a front view showing a schematic configuration of the horizontal blind according to the first embodiment of the present invention, and FIG. 3B shows a predetermined number of lifting operations in the horizontal blind according to the first embodiment of the present invention. It is a front view which shows roughly the raising / lowering operation | movement after progress.

  As shown in FIG. 3 (a), in the horizontal blind according to the first embodiment of the present invention, the lift cords 10L and 10M on the left end side and the center side far from the operation unit 3 of the head box 1 An initial cord formed by weaving synthetic fibers is used, and a predetermined stretch cord or a low stretch cord having a relatively small amount of elongation is used for the lifting cord 10R located near the operation unit 3 of the head box 1. It is configured as follows.

  That is, the lifting / lowering cords 10L and 10M are longer than the lifting / lowering cord 10R, and the load per unit length (bottom rail 5) is smaller than that of the lifting / lowering cord 10R, so that ordinary fine synthetic fibers are knitted. Use initial code.

  On the other hand, the lifting / lowering cord 10R is shorter than the lifting / lowering cords 10L and 10M, and the load per unit length (bottom rail 5) is larger than that of the lifting / lowering cords 10L and 10M. Alternatively, it is configured to use a low elongation cord.

  The stretch cord is a cord that has been stretched by applying a predetermined load in advance.

  The low elongation cord is a cord in which low elongation fibers having a small extension amount per unit length are knitted in advance, or a cord with a core.

  Here, the initial code and the stretch code will be described with reference to FIG. The initial cord is a cord that is initially formed by weaving ordinary fine synthetic fibers to which a repeated load or a constant load is not applied (a repeated load or a constant load shown in FIG. 4 is “0”).

  On the other hand, this initial cord is a cord that has been provided with a set load in advance and has low elongation, and the amount of elongation (set elongation) at the time of initial setting of the horizontal blind is small.

  Here, the “repetitive load” is a dynamic load imposed by applying a predetermined load to a lifting cord of a predetermined length for a predetermined time and then repeating an operation for releasing the predetermined load for a predetermined time. Defined. In FIG. 4, the abscissa indicates the integrated amount of the predetermined load. In a normal horizontal blind, such repeated load is imposed by repeated locking or unlocking of the stopper device 14.

  The “constant load” is defined as a static load imposed by applying a predetermined load to a lifting cord having a predetermined length for a predetermined time. In general, a characteristic indicating the extension amount of the lifting / lowering cord due to a constant load and a characteristic indicating the extension amount of the lifting / lowering cord due to a repeated load are correlated as shown in FIG.

  Therefore, for the horizontal blind at the time of initial installation (shipment), each of the plurality of lifting cords to be used is cut at the same length of a predetermined length, and the set load (1 kg weight) is applied to each lifting cord cut at the same length. ) Is applied at a constant load, it is determined that an elongation amount of 0.2% or more with respect to the predetermined length is not a stretch cord / low-extension cord, and 0.2% with respect to the predetermined length. Those having an elongation of less than% are determined to be stretch cords / low elongation cords.

  Then, as shown in FIG. 3A, the initial cord is used for the lifting cords 10L and 10M, and the amount of elongation of the lifting cord 10R is relatively small as compared with the horizontal blind at the time of initial installation (shipment). By using a predetermined stretch cord or low-extension cord, as shown in FIG. 3 (b), each lift cord 10L can be moved up and down after a predetermined number of lift operations (for example, 100 times or more). , 10M, 10R can be balanced, and the horizontality related to the raising / lowering operation of the bottom rail 5 can be substantially maintained. In other words, the horizontality of the bottom rail 5 is substantially maintained by repeating the lifting operation about 100 times (20 to 100 times).

  Further, it is selected depending on the width and height of the horizontal blind whether or not the lifting / lowering cord 10R is a predetermined stretch cord or a low stretch cord. Thereby, it is possible to uniquely determine whether the lifting / lowering cord 10R is a normal lifting / lowering cord (initial code), a predetermined stretch cord or a low-extension cord depending on the width and height of the horizontal blind. The burden can be reduced.

(Example 2)
FIG. 4A is a front view showing a schematic configuration of the horizontal blind according to the second embodiment of the present invention, and FIG. 4B shows a predetermined number of lifting operations in the horizontal blind according to the second embodiment of the present invention. It is a front view which shows roughly the raising / lowering operation | movement after progress.

  In the second embodiment, in addition to the configuration in which the lifting / lowering cord 10R of the first embodiment is a predetermined stretch cord or a low-extension cord, the case where the bottom rail 5 is inclined after a predetermined number of lifting / lowering operations has been taken into consideration. This is an example in which the bottom rail 5 having an asymmetric weight ratio in the left-right direction is adopted and adjusted in advance.

  For this reason, in Example 2, the bottom rail 5 is partially provided with the weight member 5a so as to have an asymmetric weight ratio in the left-right direction. In the example shown in FIG. 5A, an example in which a weight member 5a having a predetermined weight is installed between the attachment positions of the bottom rails 5 of the lifting / lowering cords 10M and 10R suspended from the head box 1 is shown. The installation location of the member 5a is not necessarily limited to the illustrated example.

  As shown in FIG. 5 (a), in addition to the configuration of the first embodiment, a bottom rail 5 having a weight ratio that is asymmetric in the left-right direction in advance is adopted for the horizontal blind at the time of initial installation (shipment). As shown in FIG. 5B, the amount of extension of each of the lifting / lowering cords 10L, 10M, and 10R even after the lifting / lowering operation after a predetermined number of lifting / lowering operations (for example, 100 times or more) as shown in FIG. Therefore, the horizontality related to the raising / lowering operation of the bottom rail 5 can be substantially maintained.

  In particular, when the lifting / lowering cord 10R is a predetermined stretch cord or low-extension cord, the left and right are also not uniform as the braking force for each of the plurality of lifting / lowering cords 10L, 10M, and 10R in the speed adjusting device 15. By setting the bottom rail 5 to have a weight ratio that is asymmetric in the direction, the level of the bottom rail 5 is adjusted in advance so as to be substantially maintained after a predetermined number of lifting operations (for example, 100 times or more).

  Further, the weight ratio that is asymmetric in the left-right direction of the bottom rail 5 including the installation location and weight of the weight member 5a is also selected according to the width and height of the horizontal blind. Thereby, the asymmetrical weight ratio in the left-right direction including the installation location and weight of the weight member 5a can be uniquely determined by the width and height of the horizontal blind, and the manufacturing burden can be reduced.

(Example 3)
FIG. 6A is a front view showing a schematic configuration of the horizontal blind according to the third embodiment of the present invention, and FIG. 6B shows a predetermined number of lifting operations in the horizontal blind according to the third embodiment of the present invention. It is a front view which shows roughly the raising / lowering operation | movement after progress.

  In the third embodiment, in addition to the configuration in which the lifting / lowering cord 10R of the first embodiment is a predetermined stretch cord or a low-stretch cord, a normal lifting / lowering cord (initial cord) is used for all the lifting / lowering cords 10L, 10M, and 10R. This is an example in which the height of the bottom rail 5 is adjusted by inclining in advance in the left-right direction in consideration of the case where the bottom rail 5 is inclined even after a predetermined number of lifting operations.

  Therefore, in the third embodiment, as shown in FIG. 6A, the bottom rail 5 that is suspended and supported by the plurality of lifting cords 10L, 10M, and 10R with respect to the horizontal blind at the time of initial installation (shipment) is provided. The initial installation is performed by inclining in advance so as to be higher toward the operation unit 3 side for performing the pulling operation of the lifting cords 10L, 10M, and 10R.

  For example, with respect to the horizontal blind at the time of initial installation (shipment), in addition to using normal lifting / lowering cords (initial cords) for all the lifting / lowering cords 10L, 10M, and 10R, the bottom rail 5 is inclined in advance in the left-right direction. When the height is adjusted, the inclination Δh (= about 3 to 5 mm) corresponding to the difference in elongation due to about 100 lifting / lowering operations in the lifting / lowering cords 10L, 10M, and 10R is adjusted.

  Moreover, in addition to using normal lifting / lowering cords (initial cords) for all the lifting / lowering cords 10L, 10M, and 10R with respect to the horizontal blind at the time of initial installation (shipment), the bottom rail 5 is inclined in advance in the left-right direction. When the height is adjusted, the inclination Δh (= about 5 to 10 mm) corresponding to the difference in elongation amount by about 100 lifting operations in the lifting cords 10L, 10M, and 10R is adjusted.

  By adjusting the height of the bottom rail 5 by inclining in advance in the left-right direction in this way, as shown in FIG. 6 (b), ascending / descending after a predetermined number of elevating operations (for example, 100 times or more) has elapsed. Even after the operation, the amount of extension of each of the lifting / lowering cords 10L, 10M, and 10R can be balanced, and the horizontality related to the lifting / lowering operation of the bottom rail 5 can be substantially maintained. In the example shown in FIG. 6, a horizontal blind using three lifting cords is illustrated, but a horizontal blind using four or more lifting cords can be similarly configured.

  Further, the height adjustment of the bottom rail 5 inclined in advance in the left-right direction is also selected to be defined by the width and height of the horizontal blind. Thus, the height adjustment of the bottom rail 5 that is uniquely inclined in the left-right direction can be determined by the width and height of the horizontal blind, and the manufacturing burden can be reduced.

Example 4
FIG. 7A is a front view showing a schematic configuration of the horizontal blind according to the fourth embodiment of the present invention, and FIG. 7B shows a predetermined number of lifting operations in the horizontal blind according to the fourth embodiment of the present invention. It is a front view which shows roughly the raising / lowering operation | movement after progress.

  In the fourth embodiment, in addition to the configuration in which the lifting / lowering cord 10R of the first embodiment is a predetermined stretch cord or a low-stretch cord, a normal lifting / lowering cord (initial cord) is used for all the lifting / lowering cords 10L, 10M, and 10R. Considering the case where the bottom rail 5 is tilted even after a predetermined number of elevating operations, the bottom rail 5 having an asymmetrical weight ratio in the left-right direction is adopted in advance and tilted in the left-right direction in advance. In this example, the height of the bottom rail 5 is adjusted.

  For this reason, in the fourth embodiment, as shown in FIG. 7A, the bottom rail 5 that is suspended and supported by the plurality of lifting cords 10L, 10M, and 10R with respect to the horizontal blind at the time of initial installation (shipment) is provided. The bottom rail 5 is adjusted in advance so as to have a weight ratio that is asymmetric in the left-right direction, and is initially installed with an inclination in advance so as to be higher toward the operation unit 3 side where the pulling operation of each lifting cord 10L, 10M, 10R is performed.

  In this way, by adjusting the height of the bottom rail 5 by inclining in the left-right direction in advance, as shown in FIG. 7B, ascending / descending after a predetermined number of elevating operations (for example, 100 times or more) has elapsed. Even after the operation, the amount of extension of each of the lifting / lowering cords 10L, 10M, and 10R can be balanced, and the horizontality related to the lifting / lowering operation of the bottom rail 5 can be substantially maintained. In the example shown in FIG. 7, a horizontal blind using three lifting cords is illustrated, but a horizontal blind using four or more lifting cords can be similarly configured.

  Further, the weight ratio that is asymmetric in the left-right direction in advance and the height adjustment of the bottom rail 5 that is previously inclined in the left-right direction are also selected according to the width and height of the horizontal blind. Thus, the height adjustment of the bottom rail 5 that is uniquely inclined in the left-right direction can be determined by the width and height of the horizontal blind, and the manufacturing burden can be reduced.

(Example 5)
FIG. 8A is a front view showing a schematic configuration of a horizontal blind according to the fifth embodiment of the present invention, and FIG. 8B shows a predetermined number of lifting operations in the horizontal blind according to the fifth embodiment of the present invention. It is a front view which shows roughly the raising / lowering operation | movement after progress.

  As shown in FIG. 8A, in the horizontal blind according to the fifth embodiment of the present invention, the lifting cords 10-1 and 10-2 on the left end side and the center side far from the operation unit 3 of the head box 1 are Using an initial cord constructed by knitting ordinary fine synthetic fibers, the lifting cords 10-3 and 10-4 near the operation unit 3 of the head box 1 are predetermined stretch cords having a small amount of elongation. Alternatively, it is configured to use a low elongation cord.

  That is, for horizontal blinds having four or more lifting cords having different lengths, an initial configuration in which ordinary fine synthetic fibers are knitted on a plurality of lifting cords near the non-operation portion of the head box 1 is used. A plurality of lifting cords near the operation unit of the head box 1 are configured to use a predetermined stretch cord or a low stretch cord having a relatively small amount of elongation.

  As shown in FIG. 8 (a), with respect to the horizontal blind at the time of initial installation (shipment), as shown in FIG. 8A, the initial cords are used for the lifting cords 10-1 and 10-2, and the lifting cords 10-3 and 10- For No. 4, by using a predetermined stretch cord or low-extension cord having a relatively small amount of elongation, as shown in FIG. 8 (b), a predetermined number of elevating operations (for example, 100 times or more) has elapsed. Even after the lifting / lowering operation, the amount of extension of each lifting / lowering cord is balanced, and the horizontality related to the lifting / lowering operation of the bottom rail 5 can be substantially maintained. In other words, the horizontality of the bottom rail 5 is substantially maintained by repeating the lifting operation about 100 times (20 to 100 times).

  It should be noted that the horizontal blind of the fifth embodiment can be adjusted in advance as the bottom rail 5 having an asymmetric weight ratio in the left-right direction, as in the second to fourth embodiments described above, or the lifting cords 10L, 10M, The bottom rail 5 can be initially installed by inclining in advance so as to increase toward the operation unit 3 side where the 10R pulling operation is performed, or a combination thereof can be used.

  The present invention has been described above with reference to specific embodiments and examples. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. is there. For example, in the above-described embodiment, the example in which the lifting / lowering cord is pulled by the knob 8 via the tilt operation rod 2 has been described. However, the lifting / lowering cord is exposed from the cord outlet of the head box and is suspended. The present invention can also be applied to a horizontal blind, and can be similarly configured if it is a horizontal blind having lifting cords having different lengths.

  In addition, the use of a predetermined stretch cord or low stretch cord for all the lifting cords can also reduce the effect of the bottom rail being raised or lowered. Since the sex cord tends to be higher in cost than a normal lifting cord, it is preferable to use as few as possible. Therefore, it is possible to balance both cost and performance by making the lifting / lowering cord of at least the shortest length among the plurality of lifting / lowering cords have different properties from those of the other lifting / lowering cords.

  According to the present invention, the horizontality related to the lifting operation of the bottom rail can be improved by repeating the lifting operation of the lifting cords having different lengths, so that the horizontal blind having the lifting cords having different lengths can be used. Useful.

DESCRIPTION OF SYMBOLS 1 Headbox 2 Tilt operation rod 3 Operation part 4 Slat 5 Bottom rail 5a Weight member 6 Bracket 7 Tilt operation grip 8 Knob 9 Ladder cord 10L, 10M, 10R, 10-1, 10-2, 10-3, 10-4 Elevating cord 14 Stopper device 15 Speed adjusting device

Claims (13)

A horizontal blind having a plurality of lifting cords having different lengths,
A horizontal blind characterized in that, among the plurality of lifting / lowering cords, at least a lifting / lowering cord having a minimum length is a cord having a different property from other lifting / lowering cords.   The elongation amount at the time of initial installation of the at least the lifting cord of the shortest length is smaller than the elongation amount at the time of initial installation of the lifting cord of the longest length among the plurality of lifting cords. The described horizontal blind.   The horizontal blind according to claim 1, further comprising a speed adjusting device that limits a moving speed of the plurality of lifting cords and brakes a moving speed when the slat is lowered to a predetermined value or less.   The horizontal blind according to any one of claims 1 to 3, wherein the lifting cord of at least the shortest length is made of a stretch cord that is stretched by applying a predetermined load in advance.   5. The horizontal blind according to claim 4, wherein the regulation as to whether or not the at least the shortest lifting cord is the stretch cord is selected according to the width and height of the horizontal blind.   The horizontal blind according to any one of claims 1 to 5, wherein the at least the shortest lifting cord is formed of a low-stretching cord having a small extension amount per unit length in advance.   The horizontal blind according to claim 6, wherein the regulation as to whether or not the at least shortest-length raising / lowering cord is the low-extension cord is selected according to the width and height of the horizontal blind. .   The bottom rail that is suspended and supported by each of the plurality of lifting / lowering cords has a weight ratio that is asymmetric in the left-right direction so as to be heavier on the operation unit side. Horizontal blinds as described in   The horizontal blind according to claim 8, wherein the weight ratio of the bottom rail is selected according to the width and height of the horizontal blind.   The bottom rail that is suspended and supported by each of the plurality of lifting / lowering cords is initially installed so as to be inclined in advance so as to become higher toward the operation unit side. Horizontal blinds as described in   The horizontal blind according to claim 10, wherein the height adjustment of the bottom rail that is initially installed by inclining is selected according to the width and height of the horizontal blind. A horizontal blind having a plurality of lifting cords having different lengths,
A horizontal blind characterized in that the bottom rail that is suspended and supported by the plurality of elevating cords is initially installed with an inclination in advance so that the bottom rail becomes higher toward the operation unit side.   The horizontal blind according to claim 12, further comprising a speed adjusting device that limits a moving speed of the plurality of lifting cords and brakes a moving speed when the slat is lowered to a predetermined value or less.