JP7274959B2 - horizontal blinds - Google Patents

Description

The present invention relates to horizontal blinds.

Various types of horizontal blinds have been proposed that include a head box, ladder cords, lifting cords, slats, and bottom rails (see, for example, Patent Document 1). In the horizontal blind of Patent Document 1, the ladder cord has a pair of warp yarns and a pair of weft yarns in multiple stages. A pair of warp yarns are suspended from the headbox, and a pair of weft yarns in a plurality of rows are provided between the front warp yarn and the rear warp yarn. A slat and a lifting cord are passed between the pair of weft threads.

WO2013/191186

For example, in the case of high-performance horizontal blinds, durability (abrasion resistance) of the weft threads and high light shielding properties are sometimes required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a horizontal blind capable of suppressing breakage of the weft threads while suppressing deterioration of light shielding properties. .

According to the present invention, a headbox, first and second ladder cords, slats, and lifting cords are provided, wherein the first and second ladder cords and the lifting cords are suspended from the headbox, and the The slats are supported by the weft yarn of the first ladder cord and the weft yarn of the second ladder cord, the lifting cord is provided along one of the pair of warp yarns of the first ladder cord, and the second ladder cord has , the lifting cord is not provided, and at least one of the following configurations (a) and (b) is provided, and the configuration (a) includes a plurality of The lifting cord is inserted between the weft threads, and the structure (b) is a structure in which the lifting cord is inserted between the weft threads of each stage of the first ladder cord. and wherein the wear resistance of said weft threads of a first ladder cord is higher than the wear resistance of said weft threads of a second ladder cord.

According to the present invention, the wear resistance of the weft yarn of the first ladder cord through which the lifting cord is inserted is higher than the wear resistance of the weft yarn of the second ladder cord. Therefore, even if the lifting cord is pulled into or out of the headbox, the weft yarn of the first ladder cord is prevented from being worn and cut.
In addition, when the wear resistance of the weft threads increases, the slats become difficult to rotate appropriately, and the light shielding performance of the horizontal blind may deteriorate. On the other hand, according to the present invention, the wear resistance of the weft yarn of the second ladder cord is suppressed compared to the weft yarn of the first ladder cord, so that the slats can be rotated appropriately, and the light blocking effect decrease in
As described above, according to the present invention, it is possible to suppress the breakage of the weft while suppressing the deterioration of the light shielding property.

Various embodiments of the present invention are illustrated below. The embodiments shown below can be combined with each other.
Preferably, the slats have first and second edges, the first and second edges being longitudinal edges of the slats, and the lifting cords being either the first edge or the second edge. A horizontal blind is provided passing through the edge or positioned opposite the first edge or the second edge.
Preferably, the slats have first and second edges, the first and second edges being longitudinal edges of the slats, and when the slats are raised, the first edges are With the first and second ladder cords displaced so as to be positioned below the second edge, the lifting cord is pulled into the headbox, and when the slats are lowered, the first edge moves to the first edge. A horizontal blind is provided in which the lifting cords are pulled out from the headbox with the first and second ladder cords displaced to be positioned above two edges.
Preferably, the first ladder cord and the second ladder cord are made of the same fibrous material, and the weft yarn of the first ladder cord is thicker than the weft yarn of the second ladder cord. be done.

1 is a perspective view of a horizontal blind 100 according to an embodiment; FIG. FIG. 2 is a right side view of the horizontal blind 100 shown in FIG. 1; 3A is an explanatory diagram of the slats 13, the lifting cords 1 and the ladder cords 2 in the end region X shown in FIG. 1, and is an enlarged view corresponding to the region A shown in FIG. FIG. 3B is an explanatory diagram of the slats 13, the lifting cords 1 and the ladder cords 2 in the end region X, and is an enlarged view corresponding to the region B shown in FIG. FIG. 3C is an explanatory diagram of the slats 13 and ladder cords 2 in the intermediate region Y shown in FIG. FIG. 4A is an explanatory view of the slat 13, the lifting cord 1 and the ladder cord 2 in the central region Z shown in FIG. is shown. FIG. 4B is an explanatory diagram of the slats 13, the lifting cords 1, and the ladder cords 2 in the central region Z, showing a configuration arranged at the same height position as the region B shown in FIG.

Embodiments of the present invention will be described below. Various features shown in the embodiments shown below can be combined with each other. In addition, the invention is established independently for each feature.

1. Overall configuration As shown in FIG. , an elevation shaft and a tilt shaft (not shown).
The horizontal blind 100 includes five pairs of lifting cords 1 and ladder cords 2, respectively. Each set consisting of the lifting cord 1 and the ladder cord 2 is arranged side by side in the longitudinal direction of the head box 10 . The number of sets of the lifting cord 1 and the ladder cord 2 is not particularly limited as long as it is two or more sets. is also applicable.

The bracket 11 secures the headbox 10 to a mounting object such as a window top frame. Thereby, the horizontal blind 100 is fixed to the attached body. A pulley 12 on which an operation cord 15 is hung is provided in the head box 10 . When the operator operates the operation cord 15 to rotate the pulley 12, the rotation of the pulley 12 is transmitted to a tilt shaft and an elevation shaft (not shown). Note that the tilt axis and the elevation axis are provided inside the head box 10 .

As shown in FIG. 2 , the lifting cord 1 is pulled out from the headbox 10 and hung from the headbox 10 . One end of the lifting cord 1 is attached to a winding member (not shown), and the lifting cord 1 can be wound up and unwound around the winding member. The winding member is configured to rotate integrally with the above-described elevating shaft, and the winding member is provided inside the head box 10 . A bottom rail 14 is attached to the lower ends of the lifting cord 1 and the ladder cord 2 . As the lifting cord 1 is wound around the winding member, the slat 13 rises together with the bottom rail 14 , and as the lifting cord 1 is wound back around the winding member, the slat 13 descends together with the bottom rail 14 .

The slats 13 are inserted in a pair of weft threads 5 (a first weft thread 5A and a second weft thread 5B, which will be described later). The slats 13 are supported on a pair of weft threads 5 of each ladder cord 2 . The slat 13 has a front edge 13f and a rear edge 13b (see FIG. 3B). The front edge 13 f and the rear edge 13 b extend in the longitudinal direction of the slat 13 . The front edge 13f corresponds to the first edge, and the rear edge 13b corresponds to the second edge.

As shown in FIG. 2, the ladder cord 2 includes a pair of warp threads (front warp thread 3 and rear warp thread 4) and a plurality of weft threads 5 sandwiched between them, and each weft thread 5 supports a slat 13. As shown in FIG. 2, the front warp yarns 3 and the rear warp yarns 4 of the ladder cord 2 are pulled out from the head box 10 and suspended from the head box 10, respectively. The ladder cord 2 is attached to a tilt drum (not shown), and can be displaced following the rotation of the tilt drum. The tilt drum is configured to rotate integrally with the tilt shaft described above, and the tilt drum is provided inside the head box 10 . When the tilt drum rotates, for example, counterclockwise when the horizontal blind 100 is viewed from the right side, the front warp yarn 3 is displaced so as to be pulled downward from the head box 10, and the rear warp yarn 4 is pulled back into the head box 10. is displaced as follows. As a result, the slat 13 rotates so that the front edge 13f faces downward. If the tilt drum rotates in the opposite direction, the slat 13 rotates so that the rear edge 13b faces upward.

2. Detailed Configuration of Ladder Cord 2 The ladder cord 2 of the horizontal blind 100 according to the embodiment has two types of ladder cords. Specifically, the ladder cord 2 has a first ladder cord 2A and a second ladder cord 2B. The first ladder cords 2A are arranged in two end regions X and one central region Z shown in FIG. The second ladder cords 2B are arranged in the two intermediate regions Y shown in FIG. Also, the first and second ladder cords 2A, 2B are made of the same fibrous material.

2-1. First ladder code 2A
The first ladder cord 2A has a pair of warp yarns (front warp yarn 3A and rear warp yarn 4A) and a pair of first weft yarns 5A (corresponding to the weft yarns of the first ladder cord) in multiple stages. In the embodiment, the first ladder cord 2A has a plurality of pairs (one set of two) of the first weft yarns 5A. The form which has multiple 1st weft 5A of a set may be sufficient. The front warp yarns 3A and the rear warp yarns 4A are suspended from the headbox 10 . The front warp yarn 3A and the back warp yarn 4A correspond to a pair of first warp yarns.

2-1-1. First ladder cord 2A in end region X
As shown in FIG. 3A, the slats 13 and the lifting cords 1 are inserted through the pair of first weft yarns 5A of the first ladder cords 2A in the end region X. As shown in FIG. The lift cord 1 is provided between one and the other of a pair of warp yarns (between the front warp yarn 3A and the rear warp yarn 4A), and the first weft yarn 5A and the lift cord 1 intersect. In the embodiment, part of the part of the lifting cord 1 that is hung from the head box 10 (the part that is pulled out) is provided between a pair of warp threads (between the front warp threads 3A and the rear warp threads 4A). However, it is not limited to this, and the entire portion of the lifting cord 1 that is hung from the head box 10 is provided between a pair of warp threads (between the front warp threads 3A and the rear warp threads 4A). may have been

As shown in FIGS. 2 and 3A, the lifting cord 1 is pulled out from a portion of the bottom surface of the head box 10 closer to the rear surface. As shown in FIG. 3B, the lifting cord 1 is located behind the rear edge 13b of the slat 13. As shown in FIG. The lifting cord 1 is inserted through the pair of first weft threads 5A on the uppermost stage. In addition, the lifting cord 1 is also inserted through the pair of first weft threads 5A in the lower stage than the pair of first weft threads 5A in the uppermost stage. In addition, although the case where the raising/lowering cord 1 is inserted through the pair of first weft threads 5A on and after the uppermost stage is described as an example in the embodiment, the present invention is not limited to this. The lifting cord 1 may be inserted through, for example, a pair of first weft threads 5A in the second and subsequent stages.

Since the lifting cord 1 is inserted through the pair of first weft yarns 5A, when the lifting cord 1 is wound on or unwound by a winding member (not shown), the lifting cord 1 is attached to the pair of first weft yarns. 5A and a pair of 1st weft 5A wears. Specifically, as shown in a region Rg1 shown in FIG. 3A and a region Rg2 shown in FIG. 3B, the lifting cord 1 rubs against the pair of first weft yarns 5A in multiple stages, and each pair of weft yarns wears. On the other hand, since the lifting cord 1 is not inserted through the second weft thread 5B, which will be described later, the first weft thread 5A is not worn out in the second weft thread 5B as described above.
Therefore, in the embodiment, the first weft thread 5A is configured to be thicker than the second weft thread 5B, and as a result, the wear resistance of the first weft thread 5A is higher than that of the second weft thread 5B. Specifically, the thickness Th1 of the first weft thread 5A shown in FIG. 3A is thicker than the thickness Th2 of the second weft thread 5B shown in FIG. 3C. As a result, the pair of first weft threads 5A are prevented from being cut due to rubbing against the lifting cord 1 .

2-1-2. First ladder code 2A in central region Z
As shown in FIG. 4A, the slats 13 and the lifting cords 1 are also inserted through the pair of first weft yarns 5A of the first ladder cords 2A in the central region Z. As shown in FIG. In addition, the lift cord 1 is provided between one and the other of the pair of warp threads (between the front warp thread 3A and the rear warp thread 4A), and the first weft thread 5A and the lift cord 1 intersect. . In the embodiment, part of the part of the lifting cord 1 that is hung from the head box 10 (the part that is pulled out) is provided between a pair of warp threads (between the front warp threads 3A and the rear warp threads 4A). However, it is not limited to this, and the entire portion of the lifting cord 1 that is hung from the head box 10 is provided between a pair of warp threads (between the front warp threads 3A and the rear warp threads 4A). may have been

Here, although illustration is omitted, in the central region Z, the lifting cord 1 is pulled out from a portion of the bottom surface of the head box 10 closer to the front surface. Further, as shown in FIG. 4B , the lifting cord 1 is positioned forward of the front edge 13 f of the slat 13 . The lifting cord 1 is not inserted through the pair of first weft threads 5A on the uppermost stage, but is inserted through the pair of first weft threads 5A on the second stage from the top. In addition, the lifting cord 1 is also inserted through the pair of first weft threads 5A in the lower stage than the pair of first weft threads 5A in the second stage from the top. In the embodiment, the case where the lifting cord 1 is inserted through the pair of first weft threads 5A on and after the second row from the top is described as an example, but the present invention is not limited to this. The lifting cord 1 may be inserted through, for example, a pair of first weft yarns 5A on and after the third row.

Like the lifting cords 1 in the end regions X, the lifting cords 1 in the central region Z are also inserted through the pair of first weft yarns 5A. Alternatively, when unwound, the lifting cord 1 rubs against the pair of first weft threads 5A, and the pair of first weft threads 5A wears out. Specifically, as shown in region Rg1 (see FIG. 4A) and region Rg2 (see FIG. 4B), the lifting cord 1 rubs against the pair of first weft yarns 5A in multiple stages, and each pair of weft yarns wears out. . However, the thickness Th1 of the first weft thread 5A shown in FIG. 4A is thicker than the thickness Th2 of the second weft thread 5B shown in FIG. By rubbing against each other, breakage is suppressed.

2-2. Second ladder code 2B
The components of the second ladder cord 2B are common to those of the first ladder cord 2A. As shown in FIG. 3C, the second ladder cord 2B includes a pair of warp yarns (front warp yarn 3B and rear warp yarn 4B) and a pair of second weft yarns 5B (corresponding to the weft yarns of the second ladder cord) in multiple stages. have. The front warp yarns 3B and the back warp yarns 4B are suspended from the headbox 10. As shown in FIG. The front warp yarn 3B and the back warp yarn 4B correspond to a pair of second warp yarns.

As shown in FIG. 3C, the slats 13 are inserted through the pair of second weft yarns 5B of the second ladder cords 2B in the intermediate region Y, but the lifting cord 1 is not inserted. That is, the lifting cord 1 is not provided in the second ladder cord 2B in the intermediate region Y. As shown in FIG. For this reason, the second weft yarn 5B of the second ladder cord 2B in the intermediate region Y does not need to have as much abrasion resistance as the first ladder cord 2A. It is suppressed more than the thickness.

Here, increasing the thickness of the weft thread increases the wear resistance of the weft thread, but on the other hand, the flexibility of the weft thread is impaired, making it difficult for the slats to rotate properly, and the light shielding performance of the horizontal blind. may decrease. In addition, when the slats are in the fully closed state (the state shown in FIG. 2), the thicker weft threads widen the gaps between the slats in the fully closed position, which may reduce the light shielding performance of the horizontal blind.
On the other hand, in the embodiment, since the thickness of the second weft 5B is suppressed as described above, it is suppressed that the slats 13 become difficult to rotate properly, and the gap between the slats 13 in the fully closed posture is reduced. Widening of the gap is suppressed, and as a result, deterioration of the light shielding property is suppressed.
It should be noted that, although the thicknesses of the first and second weft threads 5A and 5B are the same, it is also conceivable to make the first and second weft threads 5A and 5B different in wear resistance by using different fiber materials. This means prevents the slats 13 from becoming difficult to rotate appropriately and prevents the gaps between the slats 13 in the fully closed position from widening. However, if the fibrous materials of the first and second weft yarns 5A and 5B are different, the management burden of the weft yarns 5 and the manufacturing cost will increase accordingly. On the other hand, in the embodiment, since the fibrous materials of the first and second weft threads 5A, 5B are the same, it is possible to avoid an increase in the management burden of the weft threads 5 and an increase in the manufacturing cost.

2-4. Method for Evaluating Abrasion Resistance of First Weft Thread 5A and Second Weft Thread 5B It differs from the wear resistance of the weft 5B. That is, in the embodiment, the first ladder cord 2A and the second ladder cord 2B are made of the same fibrous material, and the first weft yarn 5A is thicker than the second weft yarn 5B. Thereby, in the embodiment, the wear resistance of the first weft threads 5A is higher than the wear resistance of the second weft threads 5B. Here, an example of a method for evaluating the abrasion resistance of the first weft yarn 5A and the second weft yarn 5B will be described. In the description here, the first weft thread 5A and the second weft thread 5B are collectively referred to as weft threads.

First, both ends of the weft thread are fixed under a predetermined tension so that the weft thread to be evaluated does not loosen. Next, a predetermined jig is applied with a predetermined load to the center of the tensioned weft thread and caused to slide. This sliding motion is repeated until the weft thread breaks.

In addition, the sliding direction of the predetermined jig is a direction perpendicular to the weft thread.
Further, the method of sliding the predetermined jig may be a method of repeatedly reciprocating the predetermined jig parallel to the above-described sliding direction, or a method of repeatedly moving the predetermined jig back and forth in one of the above-described sliding directions. A method of repeatedly sliding the jig may be used.
Moreover, the sliding speed of a predetermined jig is assumed to be constant.
The center of the weft thread mentioned above is the center between one end and the other end of the fixed weft thread.
Also, the portion of the weft thread that slides on a predetermined jig (here, the center of the weft thread) should not be changed.

Various jigs can be adopted as the predetermined jig. For example, it is possible to employ a rod-shaped member made of metal or resin having a plurality of fine irregularities formed on its surface. In the evaluation of the wear resistance of the weft yarn, the number of sliding times of a given jig is measured. It can be evaluated that the greater the number of times of sliding, the higher the abrasion resistance of the weft yarn.

3. As shown in FIG. 2, the horizontal blind 100 has the slats 13 closed (reverse fully closed or fully closed), and the slats 13 and the bottom rail 14 (see FIG. 1) move up and down. configured to move.
That is, when the slat 13 facing the horizontal direction is to be lifted, when the operator operates the operation cord 15, the slat 13 first rotates and becomes reverse fully closed, and then the slat 13 and the bottom rail 14 are opened. Rise. More specifically, when the slat 13 is raised, the first and second ladder cords 2A and 2B are displaced such that the front edge 13f of the slat 13 is positioned above the rear edge 13b. 1 is wound up by a winding member (not shown) and pulled into the head box 10 .
Further, when the slat 13 is lowered, the slat 13 is fully closed, and then the slat 13 and the bottom rail 14 are lowered. That is, when the slat 13 is lowered, the lifting cord 1 is lifted while the first and second ladder cords 2A and 2B are displaced so that the front edge 13f of the slat 13 is positioned below the rear edge 13b. is unwound from the winding member and pulled out of the headbox 10. - 特許庁

3-1. Regarding the end region X Here, when the slat 13 rotates and becomes fully closed, as shown in FIG. The spacing is narrower than the spacing between the front warp threads 3A and the rear warp threads 4A when the slats 13 are open. On the other hand, the positions at which the front warp yarns 3A and the rear warp yarns 4A are pulled out from the headbox 10 are constant. Therefore, as shown in FIG. 3A, the front warp yarns 3A and the rear warp yarns 4A are arranged so that the distance between the front warp yarns 3A and the rear warp yarns 4A gradually narrows from top to bottom. At this time, as shown in region Rg1 in FIG. 3A, the portion of the lifting cord 1 that is inserted through the first weft thread 5A in the uppermost stage is bent (see arrow Ar in FIG. 3A). , the part concerned is likely to be strongly pressed. Therefore, when the lifting cord 1 is wound on a winding member (not shown), the uppermost first weft yarn 5A tends to rub against the lifting cord 1 strongly. Compared with the pair of first weft threads 5A in the lower stage, they are more easily worn. By configuring the first weft thread 5A to be thicker than the second weft thread 5B as in the embodiment, it is effectively suppressed that the uppermost first weft thread 5A is cut.

3-2. Center Region Z In the embodiment, in the center region Z, the lifting cord 1 is not inserted through the uppermost pair of first weft threads 5A. Therefore, the bending degree of the upper portion of the lifting cord 1 in the central region Z is gentler than the bending degree of the upper portion of the lifting cord 1 in the end side region X (see arrow Ar in FIG. 4A). That is, of the pair of first weft threads 5A through which the lifting cord 1 is inserted, the uppermost pair of first weft threads 5A is compared with the uppermost pair of first weft threads 5A in the end region X. Code 1 is hard to press strongly. Therefore, in the embodiment, the thickness of the first weft yarn 5A of the first ladder cord 2A in the central region Z is the same as that of the first weft yarn 5A of the first ladder cord 2A in the end region X, but The X first ladder cord 2A may be thinner than the first weft yarn 5A.

4. Effect of Embodiment In the horizontal blind 100 according to the embodiment, the wear resistance of the first weft thread 5A through which the lifting cord 1 is inserted is higher than the wear resistance of the second weft thread 5B. Therefore, when the lifting cord 1 is pulled into the head box 10 or pulled out from the head box 10, even if the lifting cord 1 rubs against the first weft thread 5A, the first weft thread 5A is worn and cut. is suppressed.

In addition, when the abrasion resistance of the weft threads increases, the slats may become difficult to rotate appropriately, and the light shielding performance of the horizontal blind may deteriorate. For example, increasing the thickness of the weft thread increases the wear resistance of the weft thread. On the other hand, the flexibility of the weft threads may be impaired, the slats may become difficult to rotate properly, and the light shielding performance of the horizontal blind may deteriorate. In addition, when the slats are in a fully closed state, the thickness of the weft thread widens the gap between the slats in the fully closed position, which may reduce the light shielding performance of the horizontal blind.
In contrast, in the embodiment, the wear resistance of the second weft thread 5B is reduced compared to the first weft thread 5A. In other words, the abrasion resistance of the weft yarns 5 of all the ladder cords 2 is not as high as that of the first weft yarns 5A. In addition, widening of the gap between the slats 13 in the fully closed posture is suppressed. Therefore, even if the horizontal blind 100 according to the embodiment includes the first weft threads 5A, deterioration of the light shielding property is suppressed.

Thus, in the horizontal blind 100 according to the embodiment, since the first and second wefts 5A and 5B having different wear resistance are mixed, the weft 5 is cut while suppressing the deterioration of the light shielding property. It can be suppressed.

If the slat has an insertion hole in the center in the lateral direction and the lifting cord is inserted into the insertion hole for a horizontal blind, the light shielding performance is deteriorated. Therefore, in the embodiment, the lifting cord 1 is arranged so as to face the front side edge 13f or the rear side edge 13b. Here, when the lifting cord 1 is arranged so as to face the front side edge portion 13f or the rear side edge portion 13b, the lifting cord 1 rubs against the first weft thread 5A. However, in the embodiment, the wear resistance of the first weft threads 5A is enhanced as described above, so that the horizontal blind 100 according to the embodiment avoids the deterioration of the light shielding property due to the formation of the insertion holes of the slats. , it is possible to suppress the weft yarn 5 from being cut.

As shown in FIG. 2, the horizontal blind 100 is configured such that the slat 13 and the bottom rail 14 (see FIG. 1) move up and down when the slat 13 is closed. In other words, the horizontal blind 100 is configured so that the vertical blind 100 can be raised and lowered after the tilt operation is completed. In such a configuration, 3-1. As described in the end region X, the uppermost first weft yarn 5A in particular strongly rubs against the lifting cord 1, and wear of the uppermost pair of first weft yarns 5A is likely to accelerate. However, in the embodiment, since the wear resistance of the first weft threads 5A is enhanced as described above, the horizontal blind 100 according to the embodiment is configured so that the lifting operation is effective when the chilling operation is completed. It is possible to prevent the weft yarn 5 from breaking even if the weft yarn 5 is cut.

5. Other embodiment 5-1. Modification 1
In the embodiment, the first and second ladder cords 2A, 2B have been described as being made of the same fibrous material, but are not limited to this. The abrasion resistance of the first weft yarn 5A and the abrasion resistance of the second weft yarn 5B may be different because the fibrous material of the first weft yarn 5A and the fibrous material of the second weft yarn 5B are different. The first weft 5A (first ladder cord 2A) is made of, for example, aramid fiber or ultra-high molecular weight polyethylene fiber having excellent abrasion resistance, and the second weft 5B (second ladder cord 2B) is, for example, a general It can be composed of polyester fibres. In this case, the thickness of the first weft thread 5A and the thickness of the second weft thread 5B are described as being the same, but the thickness is not limited to this. The thickness of the first weft thread 5A and the thickness of the second weft thread 5B may be different as long as the wear resistance of the second weft thread 5B is not higher than the wear resistance of the first weft thread 5A. 2-4. A method of evaluating the abrasion resistance of the first weft yarn 5A and the second weft yarn 5B can be employed.

5-2. Modification 2
In the embodiment, the weft yarns 5 of each ladder cord 2 are paired, but the invention is not limited to this. In each ladder cord 2, one weft yarn 5 that does not form a pair is arranged in a plurality of stages in the vertical direction, and the lifting cord 1 is arranged between the weft yarns 5 of each stage (for example, vertically adjacent stages) of the ladder cord 2. It may be inserted. Also in this case the slats 13 are arranged on the weft threads 5 and the slats 13 are supported on the weft threads 5 .
Each ladder cord 2 has both a portion where the weft yarns 5 are paired as described in the embodiment and a portion where the weft yarns 5 are not paired as described in the second modification. good too.

1: Lifting cord 2: Ladder cord 2A: First ladder cord 2B: Second ladder cord 3: Front warp yarn 3A: Front warp yarn 3B: Front warp yarn 4: Rear warp yarn 4A: Rear warp yarn 4B: Rear warp yarn 5: Weft yarn 5A: first weft thread 5B: second weft thread 10: head box 11: bracket 12: pulley 13: slat 13b: rear edge 13f: front edge 14: bottom rail 15: operating cord 100: horizontal blind Rg1: region Rg2 : Region X : Edge region Y : Intermediate region Z : Central region

Claims (4)

a headbox, first and second ladder cords, slats, and lifting cords;
The first and second ladder cords and the lifting cord are suspended from the headbox,
The slats are supported by the weft yarns of the first ladder cord and the weft yarns of the second ladder cord;
The lifting cord is provided along one of the pair of warp threads of the first ladder cord,
each said weft yarn of a first ladder cord extends from one said warp yarn to the other said warp yarn of a pair of said warp yarns of said first ladder cord;
The second ladder cord is not provided with the lifting cord,
comprising at least one of the following configurations (a) and (b);
The configuration (a) is a configuration in which the lifting cord is inserted between the plurality of weft threads provided in each stage of the first ladder cord,
The configuration (b) is a configuration in which the lifting cord is inserted between the weft threads of each stage of the first ladder cord,
A horizontal blind, wherein the wear resistance of said weft threads of a first ladder cord is higher than the wear resistance of said weft threads of a second ladder cord. A horizontal blind according to claim 1,
the slat has first and second edges;
the first and second edges are longitudinal edges of the slat;
A horizontal blind, wherein the lift cord passes through the first edge or the second edge or is arranged opposite the first edge or the second edge. A horizontal blind according to claim 1 or claim 2,
the slat has first and second edges;
the first and second edges are longitudinal edges of the slat;
When the slat is raised, the lifting cord is drawn into the headbox with the first and second ladder cords displaced such that the first edge is positioned below the second edge,
When the slat is lowered, the lifting cord is pulled out from the headbox while the first and second ladder cords are displaced such that the first edge is positioned above the second edge. . The horizontal blind according to any one of claims 1 to 3,
The first ladder cord and the second ladder cord are made of the same fiber material,
The horizontal blind, wherein the weft thread of the first ladder cord is thicker than the weft thread of the second ladder cord.

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