CN106232929B

CN106232929B - Horizontal shutter

Info

Publication number: CN106232929B
Application number: CN201580020247.2A
Authority: CN
Inventors: 立川光威; 冈村正
Original assignee: Tachikawa Blind Manufacturing Co Ltd
Current assignee: Tachikawa Blind Manufacturing Co Ltd
Priority date: 2014-04-25
Filing date: 2015-04-23
Publication date: 2019-12-27
Anticipated expiration: 2035-04-23
Also published as: WO2015163417A1; JPWO2015163417A1; CN106232929A; JP6745215B2

Abstract

The invention provides a horizontal shutter which has a simple structure and can adjust the angles of an upper blade group and a lower blade group at different angles; the horizontal shutter comprises an angle adjusting mechanism (1), a lifting mechanism (2) and an angle converting mechanism (3); the angle adjusting mechanism (1) is a mechanism for adjusting the angle of the blade group (4), and is composed of direction control ropes (1A-1C), winding drums (11A-11C), an angle shaft (12), a gear device (13) and an operating rod (14); the lifting mechanism (2) is a mechanism for lifting or lowering the blade group (4), and is composed of lifting ropes (20A-20C), rollers (21A-21C), a lifting rope stop block (22), a rope balancer (23) and an operation rope (24); the angle conversion mechanism (3) is a mechanism for converting the angle of the lower blade group (4A), and is composed of conversion ropes (30A, 30C), rollers (31A, 31C), a stopper (32) for conversion ropes, a handle (33), and a handle balancer (34).

Description

Horizontal shutter

Technical Field

The present invention relates to a horizontal blind window capable of adjusting the angle of an upper blade group and a lower blade group at different angles.

Background

As such a horizontal blind, there is a technique described in patent document 1, for example. The horizontal blind has a first hanging roll with a small diameter and a second hanging roll with a large diameter. Further, an upper end of a first direction control rope supporting the upper blade group is installed on the first suspension drum, and a center sill (intermediate rail) is installed at a lower end of the first direction control rope. In addition, an upper end of a second direction control rope supporting the lower blade group is attached to the second suspension drum, and a lower beam is attached to a lower end of the second direction control rope. Thus, when one or both of the first suspension drum and the second suspension drum are rotated, the upper blade group or the lower blade group is rotated via the first direction control rope and the second direction control rope, and one or both of the upper blade group and the lower blade group is brought into an open state or a closed state.

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese laid-open patent publication No. 2009-235670

However, the conventional horizontal blind described above has the following problems. That is, in the horizontal blind described above, two first suspension reels and second suspension reels having different diameters are required, and a mechanism for integrally rotating the first suspension reels and the second suspension reels in combination or rotating only one of the suspension reels is required, so that the structure of the blade angle adjustment mechanism itself is complicated. Therefore, there is a demand for the appearance of a horizontal blind that has a simple structure and can adjust the angles of the upper blade group and the lower blade group at different angles.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a horizontal blind that has a simple structure and can adjust the angles of an upper blade group and a lower blade group at different angles.

According to the present invention, there is provided a horizontal blind comprising: a horizontal blind according to the present invention is a horizontal blind including a plurality of blades, each blade group including an upper blade group and a lower blade group, the upper blade group including a plurality of blades including an uppermost blade, and the lower blade group including a plurality of blades disposed below the upper blade group, the upper blade group including a plurality of blades, the lower blade group including a plurality of blades, the plurality of blades being rotatably supported by a blade support cord suspended from an upper beam, and the lower beam being elevatably supported by an elevation cord suspended from the upper beam; the horizontal louver comprises an angle conversion mechanism capable of converting the angle of the lower blade group; the angle conversion mechanism includes a conversion rope having one end side supporting the lower blade group and the other end side passing through the inside of the upper beam, and a conversion operation portion capable of performing an operation of introducing or withdrawing the conversion rope into or from the upper beam.

According to the above configuration, the angle of the lower blade group can be changed with a simple configuration. The result is the following excellent effects: that is, the number of manufacturing steps and manufacturing cost of the horizontal louver that can adjust the upper blade group and the lower blade group at different angles can be reduced.

Various embodiments of the present invention are illustrated below. The embodiments shown below may be combined with each other.

Preferably: the blade support rope is a direction control rope consisting of a pair of longitudinal ropes and a plurality of transverse ropes, one end of the direction control rope is connected to the lower beam; the horizontal blind includes an angle adjusting mechanism capable of adjusting the angle of the blade group to a predetermined angle by rotating a drum to which the other ends of the pair of longitudinal cords are attached by an operating portion and moving one of the pair of longitudinal cords relatively up and down with respect to the other, and a lifting mechanism capable of lifting or lowering the blade group by drawing in or out a lifting cord, one end of which is connected to the lower beam and the other end of which passes through the inside of the upper beam, into or from the upper beam; the one end of the conversion rope is connected to a portion of one of the pair of vertical ropes and is located near the uppermost blade in the lower blade group.

According to the above configuration, the angle adjustment mechanism is operated by the operation portion to adjust the angle of the blade group, thereby making it possible to bring the horizontal blind into the fully opened state or the fully closed state. Further, by operating the elevating mechanism, the blade group can be sequentially lifted from below or sequentially lowered from above.

Further, when the angle conversion mechanism is operated by the conversion operation portion and the conversion rope is drawn into the upper beam in a state where the blade group is fully opened, the lower portion side of the vertical rope connected to the conversion rope is pulled up, and the lower blade group is inclined. As a result, the upper portion of the horizontal louver is kept in the open state and the lower portion is brought into the closed state.

On the other hand, when the angle adjusting mechanism is operated to pull up one of the pair of longitudinal strings to which the switching string is not connected to bring the blade group into the fully closed state, and then the angle switching mechanism is operated to draw the switching string into the upper beam, the inclined lower blade group is returned to the original state. As a result, the upper portion of the horizontal louver remains closed and the lower portion thereof is opened.

Preferably, the composition is: the operation portion of the angle adjustment mechanism is a tubular operation rod having one end portion attached to the outer side of the upper beam and capable of rotationally operating the drum, and the conversion operation portion of the angle conversion mechanism is the other end portion side of a conversion rope which is led out to the outside of the upper beam through the inside of the upper beam and is inserted into the operation rod from the one end portion side of the operation rod.

According to this configuration, the operation rod is operated to rotate the drum of the angle adjustment mechanism, thereby making it possible to bring the horizontal blind into the fully opened state or the fully closed state. Further, by pulling or retracting the other end portion side of the conversion string inserted into the operation rod to operate the angle conversion mechanism, only the lower blade group can be brought into the closed state or the open state.

Preferably, the composition is: the cylindrical handle is slidably fitted to the outside of the operating rod so that a projection provided on the inside of one end portion of the handle engages with a projection provided on the outside of the other end portion of the operating rod, and the other end of the conversion cord pulled out from the other end portion of the operating rod is connected to the other end portion side of the handle.

According to this configuration, when the handle to which the other end of the conversion rope is connected is pulled, the lower blade group is inclined. Further, when the handle is pulled to the maximum, the convex portion of the handle engages with the convex portion of the operation rod, and the handle cannot be pulled. In this state, the inclination angle of the lower blade group becomes maximum. In addition, the lower blade group is returned to the original angle by retracting the handle. Therefore, by setting the inclination angle of the lower blade group in the state where the handle is maximally pulled to a desired value in advance, the lower blade group can be easily and reliably inclined to a desired angle by the handle operation.

According to this configuration, the lower blade group can be easily and reliably tilted to a desired angle by the handle operation.

Preferably, the composition is: the cover member is fitted into the opening on the other end side of the handle so as to be freely movable in and out, and the other end of the conversion cord is connected to the cover member.

According to this configuration, when the handle is pulled to the maximum extent and the switching cord is in a state in which the switching cord cannot be pulled any more, the switching cord can be pulled further by pulling the cover member away from the handle.

Preferably, the composition is: one end of the conversion rope is connected to a longitudinal rope of the pair of longitudinal ropes, the longitudinal rope being located opposite to the notch.

Preferably, the composition is: the conversion rope passes through the space between the upper blade and the transverse rope from one side direction, then passes through the space between the blades and the transverse rope from the other side direction at the position of the lower blade than the blades, so as to be woven into the transverse rope, and then one end of the conversion rope is connected to the longitudinal rope.

According to this configuration, since the switching cord is knitted into the lateral cord, the switching cord does not hang down from the lateral blind due to slackening when the blade group is raised by the raising/lowering mechanism. According to this configuration, since the slack of the conversion rope can be prevented when the blade group is lifted, it is possible to prevent the blade group from being caught by the slack conversion rope and being unable to be lowered.

Preferably, the composition is: a plurality of ring parts are arranged on a vertical rope connected with a conversion rope at a predetermined interval from the position of the connection conversion rope to the upper beam side, and one end of the conversion rope is connected to the vertical rope after passing through the plurality of ring parts.

According to this configuration, since the switching cord passes through the plurality of ring portions, the switching cord does not hang down from the horizontal louver due to slackening when the blade group is raised by the raising/lowering mechanism. According to the above configuration, the number of layers of the lower blade group operated by the angle conversion mechanism can be easily changed.

Preferably, the composition is: a hook portion is provided at one end of the conversion cord, and the hook portion is detachably locked to a ring portion located at a connection position of the conversion cord.

According to this configuration, the hook portion is locked to the ring portion at a desired position, whereby the blade group located below the portion where the hook portion is locked can be operated by the angle conversion mechanism. Further, the hook portion is detached from the ring portion and locked to the ring portion at a desired position, whereby a desired number of blade groups can be operated. According to this configuration, since the slack of the conversion rope can be prevented when the blade group is lifted, it is possible to prevent the blade group from being caught by the slack conversion rope and being unable to be lowered.

Drawings

Fig. 1 is a front view showing a horizontal blind according to a first embodiment of the present invention.

Fig. 2 is a sectional view a-a as viewed along arrows of fig. 1.

Figure 3 is a top view of a horizontal blind.

Fig. 4 is a partially enlarged view of fig. 3.

Fig. 5 is a B-B sectional view as viewed along arrows of fig. 4.

Fig. 6 is a perspective view of the stopper for the lift cord and the stopper for the switching cord shown with the spacer removed.

Fig. 7 is an explanatory diagram showing a connection state between the steering rope and the vertical ropes of the direction control rope.

Fig. 8 is an external view of the handle attached to the operation rod.

Fig. 9 is a sectional view for explaining functions of the handle and the handle balancer.

Fig. 10 is a partial front view of the horizontal blind showing a state where the lower blade group is closed.

Fig. 11 is a sectional view of the horizontal blind showing a state where the lower blade group is closed.

Fig. 12 is a schematic view for explaining a fully opened state of the horizontal blind.

Fig. 13 is a schematic view for explaining a fully closed state of the horizontal blind.

Fig. 14 is a schematic view for explaining a lifting state of the horizontal louver.

Fig. 15 is a schematic view for explaining the up-and-down closed state of the horizontal louver.

Fig. 16 is a schematic view for explaining the up-and-down state of the horizontal louver.

Fig. 17 is a schematic view for explaining a state in which the angle conversion mechanism is operated in a state in which the horizontal louver is raised.

Fig. 18 is a schematic diagram for explaining a state in which the elevating mechanism is operated from the state shown in fig. 17.

Fig. 19 is a schematic view showing a state after the horizontal louver is returned to the normally opened state.

Fig. 20 is a schematic view showing a horizontal blind according to a second embodiment of the present invention.

Fig. 21 is a sectional view for explaining the stopper for a switching cord.

Fig. 22 is a sectional view for explaining the function of the stopper for a switching cord.

Fig. 23 is a perspective view showing a main part of a horizontal blind according to a third embodiment of the present invention.

Fig. 24 is a perspective view showing a main part of a horizontal blind according to a fourth embodiment of the present invention.

Fig. 25 is a schematic view showing a configuration of a horizontal louver according to a sixth embodiment of the present invention.

Fig. 26 is a schematic view showing a configuration of a horizontal louver according to a seventh embodiment of the present invention.

Fig. 27 is a schematic view showing a configuration of a horizontal louver according to an eighth embodiment of the present invention.

Fig. 28 is a schematic view showing a configuration of a horizontal louver according to a ninth embodiment of the present invention.

Fig. 29 (a) to (b) are diagrams for explaining the operation of the horizontal blind according to the ninth embodiment of the present invention.

Fig. 30 (a) to (b) are schematic views for explaining the operation of the horizontal blind according to the ninth embodiment of the present invention.

Fig. 31 (a) to (c) are diagrams for explaining the operation of the horizontal blind according to the ninth embodiment of the present invention.

(symbol description)

1A-1C … direction control rope of 1 … angle adjusting mechanism

2 … lifting mechanism 3 … angle conversion mechanism

4 … blade group and 4A … lower blade group

4B … Upper segment blade group and 4C … middle segment blade group

5A-5C … support member 6 … upper beam

10a, 10b … longitudinal 10c, 10d … transverse

11A-11C … reel 12 … angle shaft

13 … Gear arrangement 14 … operating rod

Anti-falling part of 14A … universal joint 14B, 33B …

14a … upper end 14b, 33b … lower end

20A-20C … lifting rope 21A-21C, 31A, 31C … roller

Stopper 23 … rope balancer for 22 … lift rope

24 … operating ropes 30A, 30C … switching rope

32. Stopper 33 … handle for 32' … switching rope

33A … end wall 33c … lower end opening

33d … long hole 34 … handle balancer

35 … Upper portion of rod 35a …

35b … lower part 36, 37 … leaf spring

38 … Ring portion 39 … hook portion

40 … blade 41 … cut-out portion

50 … bearing portion 52 … auxiliary rope

53 … center sill 60 … lower sill

61 … spacers 61a, 61b, 61c … holes

62. 63, 66 … connection point 64, 65 … angle conversion mechanism

Stroke of S …

Detailed Description

Hereinafter, the best mode of the present invention will be described with reference to the drawings.

(first embodiment)

Fig. 1 is a front view showing a horizontal blind according to a first embodiment of the present invention, fig. 2 is a sectional view taken along an arrow a-a in fig. 1, and fig. 3 is a plan view of the horizontal blind. As shown in fig. 1, the horizontal blind of the present embodiment includes an angle adjusting mechanism 1, a lifting mechanism 2, and an angle converting mechanism 3.

The angle adjustment mechanism 1 is a mechanism capable of adjusting the angle of the blade group 4 to a predetermined angle, and is composed of three sets of direction control ropes 1A to 1C, reels 11A to 11C supported by the respective sets of the three sets of support members 5A to 5C, an angular shaft 12, a gear device 13, and an operation rod 14 as an operation portion.

Each direction control string 1A (1B, 1C) is a string for supporting the multi-stage blade group 4, and is formed of a pair of longitudinal strings 10a, 10B and a plurality of pairs of lateral strings 10C, 10d, as shown in fig. 2. Specifically, the lower ends of the longitudinal strings 10a and 10B are connected to the lower beam 60, and the upper ends of the longitudinal strings 10a and 10B are connected to the reels 11A (11B and 11C) of the support members 5A (5B and 5C) in the upper beam 6. A plurality of pairs of lateral cords 10c and 10d are connected between the vertical cords 10a and 10b at regular intervals, and the blades 40 are supported by the lateral cords 10c and 10 d.

Fig. 4 is a partially enlarged view of fig. 3, and fig. 5 is a B-B sectional view as viewed along arrows of fig. 4. As shown in fig. 3 and 4, all of the reels 11A to 11C are connected to an angular shaft 12 having a hexagonal cross section. Thereby, the reels 11A to 11C rotate integrally by rotating the angular shaft 12. Specifically, as shown in fig. 5, the entire angular shaft 12 to which the reel 11A (11B, 11C) is connected is rotatably held by the support members 5A (5B, 5C) by the bearing portions 50 of the support members 5A (5B, 5C). As shown in fig. 4, the right end of the angular shaft 12 is connected to the gear device 13 in a gear mechanism manner.

In fig. 1, the operating rod 14 is a cylindrical body disposed outside the upper beam 6, and an upper end portion 14A as one end portion thereof is connected to the gear device 13 via a universal joint 14A. Thus, when the operation rod 14 is rotated in the normal direction or the reverse direction in the circumferential direction, the rotation thereof is transmitted to the angular shaft 12 through the universal joint 14A and the gear device 13, and the drum 11A (11B, 11C) rotates in accordance with the rotation of the angular shaft 12.

In fig. 2 of the present embodiment, the operation rod 14 is rotated in the normal direction, and the spool 11A (11B, 11C) is rotated in the counterclockwise direction. Thereby, the vertical strings 10a of the direction control strings 1A (1B, 1C) are raised, and the vertical strings 10B are lowered, so that the blade group 4 rotates counterclockwise to be in a fully closed state. Then, in this state, the operation rod 14 is reversed, whereby the spool 11A (11B, 11C) is rotated clockwise. As a result, the vertical strings 10a of the direction control strings 1A (1B, 1C) are lowered, and the vertical strings 10B are raised, so that the blade group 4 is rotated clockwise to return to the fully open state shown in fig. 2. Then, when this rotation is further continued, the blade group 4 will become a reverse fully closed state.

In fig. 1, the lifting mechanism 2 is a mechanism capable of raising and lowering the blade group 4, and as shown in fig. 2 to 5, the lifting mechanism 2 is composed of three lifting ropes 20A to 20C, rollers 21A to 21C provided in three sets of support members 5A to 5C, a stopper (stopper)22 for the lifting ropes, a rope balancer 23, and an operation rope 24.

As shown in fig. 1 and 2, each of the lift cords 20A (20B, 20C) is a cord that sequentially raises or lowers the blade group 4 by raising or lowering the lower beam 60, and has a lower end as one end connected to the lower beam 60 and an upper end as the other end drawn into the upper beam 6. Specifically, as shown in fig. 5, the rollers 21A (21B, 21C) are rotatably disposed in the support members 5A (5B, 5C) at the lower left of the drums 11A (11B, 11C), and the upper end portions of the lift cords 20A (20B, 20C) are suspended from the rollers 21A (21B, 21C). Then, as shown in fig. 4, lift cord 20A (20B, 20C) is guided to lift cord stopper 22 side in upper beam 6 and inserted into lift cord stopper 22.

Fig. 6 is a perspective view of the stopper for the lift cord and the stopper for the switching cord shown with the spacer removed. As shown in fig. 4, a spacer 61 is attached to the right end side of the upper beam 6, and the lifter rope stopper 22 is housed in the spacer 61 together with a below-described conversion rope stopper 32. As shown in fig. 6, the spacer 61 is formed in a box shape, and a hole 61a through which the corner shaft 12 is inserted, a hole 61b through which the three lift cords 20A to 20C are inserted, and a hole 61C through which the two switching cords 30A and 30C described later are inserted are provided on a front surface (left side surface in fig. 6) and a rear surface (not shown) of the spacer 61.

The stopper 22 for the lift cord is a known stopper, and in the present embodiment, a stopper device described in japanese patent No. 3479038 is used. That is, in fig. 4, when the lift cord 20A (20B, 20C) inserted into the lift cord stopper 22 is manually pulled rightward, the lift cord 20A (20B, 20C) suspended outside the upper beam 6 is lifted via the roller 21A (21B, 21C), and the lower beam 60 (see fig. 2) is pulled up, whereby the blade group 4 is lifted up. Here, when the pulling-up operation is stopped and the hand is separated from the lift cord 20A (20B, 20C), the blade group 4 tries to descend together with the lower beam 60, but the lift cord stopper 22 operates to prevent the free fall. When the lift cord 20A (20B, 20C) is pulled to the right side in a state where the function of preventing the free fall of the lift cord stopper 22 is activated, the function of preventing the free fall of the lift cord stopper 22 is released, the blade group 4 falls freely together with the lower beam 60, and the lift cord 20A (20B, 20C) in the upper beam 6 is pulled to the left side.

The three lift cords 20A to 20C are inserted through the lift cord stopper 22 that performs the above-described function, and then drawn out to the outside of the upper beam 6 and connected to the cord balancer 23. Then, as shown in fig. 1, the upper end of the operation rope 24 is connected to the rope balancer 23, and the lower end is connected to the lower beam 60. Thus, the operation rope 24 is pulled down or the pulling force on the operation rope 24 is released, whereby the blade group 4 can be operated to ascend or descend.

In fig. 1, the angle conversion mechanism 3 is a mechanism capable of converting only the angle of the lower blade group 4A of the blade group 4 to a predetermined angle, and as shown in fig. 4, the angle conversion mechanism 3 is composed of two conversion strings 30A, 30C, rollers 31A, 31C provided in the support members 5A, 5C, a stopper 32 for the conversion strings, a handle 33 as a conversion operation portion, and a handle balancer 34 as a cover member.

As shown in fig. 1, each conversion cord 30A (30C) is led out from the upper beam 6, and the lower end as one end thereof is connected to the longitudinal cord 10A on one side of the direction control cord 1A (1C). Fig. 7 is an explanatory diagram showing a connection state of the switching cord 30A (30C) and the vertical cord 10A of the direction control cord 1A (1C). As shown in fig. 7 (a), the switching rope 30A (30C) passes through the lateral rope 10d supporting each blade 40 of the upper blade group 4B and reaches the vicinity of the uppermost blade 40 in the lower blade group 4A, and the lower end of the switching rope 30A (30C) is connected to the longitudinal rope 10A at the vicinity position.

Specifically, as shown in fig. 7 (B), in the upper blade group 4B, the switching string 30A (30C) is knitted so as to pass from the right side in the drawing, which is one direction, to the lower side of the lateral string 10d on the upper blade 40, and then is knitted so as to pass from the left side in the drawing, which is the other direction, to the lateral string 10d on the lower blade 40. After the conversion string 30A (30C) is similarly incorporated into the lateral string 10d of the blade 40 therebelow, the lower end of the conversion string 30A (30C) is connected to the vertical string 10A at a position near the lower blade group 4A. In the present embodiment, the example in which the conversion string 30A (30C) is incorporated into the lateral string 10d of the blade 40 at each layer of the upper blade group 4B is described, but the conversion string 30A (30C) may be incorporated into the lateral string 10d of the blade 40 at intervals of an arbitrary number of layers, such as two layers, three layers, or the like, instead of each layer.

As described above, the lower end of the switching rope 30A (30C) is connected to the longitudinal rope 10A of the direction control rope 1A (1C), and the upper end side, which is the other end side thereof, is introduced into the upper beam 6 as shown in fig. 1 and 2. Specifically, as shown in fig. 5, the roller 31A (31C) is rotatably disposed in the support member 5A (5C) at the lower right of the drum 11A (11C), and the upper end portion of the conversion rope 30A (30C) is suspended on the roller 31A (31C). As shown in fig. 4, the switching cord 30A (30C) is guided to the switching cord stopper 32 side in the upper beam 6 and inserted into the switching cord stopper 32.

The stopper 32 for a change-over rope is also a known stopper having the same structure as the stopper 22 for an elevator rope. The function of the switch cord stopper 32 for preventing free fall of the switch cord 30A (30C) will be described later.

The two conversion cords 30A and 30C are inserted into the stopper 32 for conversion cord that functions as described above, are pulled out to the outside of the upper beam 6, and then pass through the operation rod 14 and the handle 33. Then, the ends of the two conversion ropes 30A and 30C are connected to a handle balancer 34 (see fig. 1).

Fig. 8 is an external view of the handle 33 attached to the operation rod 14, and fig. 9 is a sectional view for explaining functions of the handle 33 and the handle balancer 34. In addition, in fig. 9, the diameters of the operation rod 14, the handle 33, and the handle balancer 34 are shown enlarged from the diameters shown in fig. 8 in order to make it easy to observe the inside of the member.

As shown in fig. 8, the grip 33 is a tubular body having a predetermined length, and is slidably fitted on the outside of the operation rod 14. Specifically, as shown in fig. 9 (a), the large-diameter grip 33 is fitted to the outside of the small-diameter operation rod 14 so as to be slidable in the longitudinal direction. An annular retaining member 14B as a convex portion is attached to the outside of the lower end portion 14B of the operating rod 14, and an end wall 33A engageable with the retaining member 14B is formed at the upper end of the grip 33. Further, a retaining member 33B as a convex portion is attached to the inside of the lower end portion 33B of the handle 33, and the handle balancer 34 is fitted into the lower end portion 33B as the other end portion of the handle 33 so as to be freely movable from the lower end opening 33 c. Thus, the retaining member 33B is formed with: the handle balancer 34 is interposed between the stopper member 14B of the operating rod 14, and engages with the handle balancer 34 or the stopper member 14B of the operating rod 14.

The switching cords 30A and 30C are inserted from the upper end portion 14a of the operation rod 14 fitted with the handle 33 and are introduced into the handle 33. Then, the ends of the conversion ropes 30A, 30C are tied to the handle balancer 34.

By adopting the above-described configuration for the operation rod 14, the handle 33, and the handle balancer 34, when the handle 33 is pulled downward by the distance S as shown by the arrow in fig. 9 (B), the end wall 33A of the handle 33 engages with the retaining member 14B of the operation rod 14. As shown in fig. 9 (a), when the grip 33 is returned upward of the operation rod 14 by the distance S, the retaining member 33B of the grip 33 engages with the retaining member 14B of the operation rod 14. Therefore, by operating the handle 33, the switching cords 30A and 30C can be pulled or returned only by the stroke S with respect to the operating lever 14 side. As shown by the arrow in fig. 9 (C), the handle balancer 34 is pulled out of the handle 33, whereby the conversion ropes 30A and 30C can be pulled by a distance equal to or longer than the stroke S.

Here, the function of the angle conversion mechanism 3 will be explained.

Fig. 10 is a partial front view of the horizontal louver illustrating the closed state of the lower blade group 4A, and fig. 11 is a sectional view of the horizontal louver illustrating the closed state of the lower blade group 4A.

As shown in fig. 9 (a), in a state where the handle 33 is returned toward the upper end 14a of the operating rod 14, no tensile force is applied to the switching cord 30A (30C). Therefore, the lower blade group 4A is not tilted and is in an open state. When the handle 33 is pulled by the distance of the stroke S to the maximum from this state as shown in fig. 9 (b), the switching cord 30A (30C) is pulled into the operation rod 14 side by the distance of the stroke S.

Then, as shown in fig. 10 and 11, the conversion string 30A (30C) pulled out from the upper beam 6 is drawn into the upper beam 6 by the stroke S, and the portion of the longitudinal string below the connection portion in the longitudinal string 10A of the direction control string 1A (1C) connected to the conversion string 30A (30C) is pulled up by the stroke S. As a result, the lower blade group 4A is inclined to be in the closed state.

Here, when the pulling-up operation is stopped and the hand is separated from the handle 33, the switching cord 30A (30C) is free-falling and the lower blade group 4A attempts to return to the open state, but the function of the stopper 32 for switching cord (see fig. 4 and 6) for preventing free-falling functions to prevent the falling of the switching cord 30A (30C), and the lower blade group 4A is maintained in the closed state. At this time, the handle 33 is pulled back to a position slightly upward from the lowermost position shown in fig. 9 (b). Therefore, when the handle 33 is slightly pulled downward in this state, the function of the stopper 32 for the conversion cord to prevent free fall is released. Then, as shown in fig. 1 and 2, the switching rope 30A (30C) is pulled out from the upper beam 6 by the stroke S, and the tension to the vertical rope 10A is released, so that the lower blade group 4A returns to the original open state.

Next, a use example of the horizontal louver according to the present embodiment will be described. Fig. 12 is a schematic view for explaining a fully opened state of the horizontal louver, fig. 13 is a schematic view for explaining a fully closed state of the horizontal louver, and fig. 14 is a schematic view for explaining a raised/lowered state of the horizontal louver. In addition, in the diagrams of fig. 12 to 19, for easy understanding, the elevating mechanism 2 and the angle conversion mechanism 3 are respectively disposed on both sides of the direction control cords 1A to 1C of the angle adjustment mechanism 1.

First, in the horizontal blind of the present embodiment, as shown in fig. 12, the following states are set as initial states: that is, the reels 11A (11B, 11C) of the angle adjusting mechanism 1 are positioned at the initial position, and the lift cords 20A (20B, 20C) of the lift mechanism 2 and the conversion cord 30A (30C) of the angle conversion mechanism 3 hang down from the upper beam 6 to the maximum extent, and the blade group 4 is opened, and the horizontal blind is in the fully opened state.

In this state, when the operating rod 14 of the angle adjusting mechanism 1 is rotated in the normal direction as shown in fig. 13, the spool 11A (11B, 11C) rotates in the counterclockwise direction, the vertical cord 10a of the direction control cord 1A (1B, 1C) is pulled up, and the vertical cord 10B is pulled down. As a result, the blade group 4 tilts upward to the right, and the horizontal blind becomes a fully closed state. Therefore, when the operating rod 14 of the angle adjusting mechanism 1 is reversed from this state, the spool 11A (11B, 11C) rotates clockwise, the vertical cord 10B of the direction control cord 1A (1B, 1C) is pulled up, and the vertical cord 10a is pulled down, so that the horizontal blind returns to the fully open state.

Then, as shown in fig. 14, when the operation cord 24 of the raising and lowering mechanism 2 is pulled down in the fully opened state of the horizontal blind, the raising and lowering cords 20A (20B, 20C) hanging from the upper beam 6 are pulled up, the lower beam 60 rises, and the blade group 4 rises in order from the lower side. When the hand is separated from the operation cord 24 in a state where the blade assembly 4 is pulled up to a desired height, the function of the lift cord stopper 22 for preventing free fall is exerted, and the lowering of the lift cord 20A (20B, 20C) is prevented, so that the blade assembly 4 is stopped at a desired height position.

After the operation cord 24 is pulled down from this state, the function of preventing the free fall of the lift cord stopper 22 is released by releasing the hand, and the blade group 4 falls together with the lower beam 60, and the horizontal blind returns to the state shown in fig. 12.

However, when the blade group 4 is raised by the raising and lowering mechanism 2, the conversion string 30A (30C) of the angle conversion mechanism 3 may be loosened and hang down long downward as shown by the broken line. When the blade group 4 is lowered in this state, the blade group 4 is caught by the slack conversion string 30A (30C) and cannot be lowered.

However, in the present embodiment, as shown in fig. 7, the switching cord 30A (30C) is incorporated into the lateral cord 10d of the direction control cord 1A (1C). Therefore, when the blade group 4 is raised by the raising/lowering mechanism 2, the switching cord 30A (30C) rises integrally with the vertical cords 10A and 10b and the horizontal cords 10C and 10d of the direction control cord 1A (1C), and therefore, there is no slack and no hanging.

As described above, according to the horizontal blind of the present embodiment, the horizontal blind can be fully opened, fully closed, and raised and lowered easily by using the operation rod 14 of the angle adjustment mechanism 1 or the operation cord 24 of the raising and lowering mechanism 2.

Next, a use example in which the angle states of the lower blade group 4A and the upper blade group 4B of the horizontal blind are different will be described. Fig. 15 is a schematic view for explaining a vertical opening/closing state of the horizontal louver, and fig. 16 is a schematic view for explaining a vertical opening/closing state of the horizontal louver. In the initial state shown in fig. 12, when the handle 33 of the angle conversion mechanism 3 is pulled down to raise the conversion string 30A (30C) hanging from the upper beam 6 by the stroke S as shown in fig. 15, the lower blade group 4A is inclined to be in the closed state.

In this state, when the hand is separated from the handle 33, the function of preventing the free fall of the switch rope stopper 32 is activated, and the lowering of the switch rope 30A (30C) is prevented, so that the lower blade group 4A is stopped in an inclined state. As a result, the horizontal louver is opened upward and closed downward because the upper blade group 4B is opened and the lower blade group 4A is closed.

In the initial state shown in fig. 12, when the operating rod 14 of the angle adjusting mechanism 1 is reversed as shown in fig. 16 (a), the vertical cord 10B of the direction control cord 1A (1B, 1C) is pulled up, the vertical cord 10a is pulled down, the blade group 4 is tilted to the upper left, and the horizontal blind is brought into the fully closed state in the reverse direction. In this state, when the handle 33 of the angle conversion mechanism 3 is pulled to the maximum extent as shown in fig. 16 (b), the conversion cord 30A (30C) is raised by the length of the stroke S, and the vertical cord 10A that is lower than the initial state is pulled up. As a result, the horizontal louver is in the state of being opened upward, because the lower blade group 4A is opened.

As described above, according to the horizontal blind of the present embodiment, the operation rod 14 of the angle adjustment mechanism 1 or the handle 33 of the angle conversion mechanism 3 is used, whereby the horizontal blind can be easily opened upward and closed downward or opened upward and downward.

Next, a specific use example of the horizontal blind will be described. Fig. 17 is a schematic view for explaining a state in which the angle conversion mechanism 3 is operated in a state in which the horizontal blind is raised, fig. 18 is a schematic view for explaining a state in which the raising/lowering mechanism 2 is operated from the state shown in fig. 17, and fig. 19 is a schematic view for explaining a state in which the horizontal blind is returned to the normally opened state.

As shown in fig. 17 (a), when the entire blade group 4 is raised by the elevating mechanism 2 from the initial state shown in fig. 12, the conversion string 30A (30C) of the angle conversion mechanism 3 is in a redundant state. In this state, the switching rope 30A (30C) does not interfere with the lowering of the blade group 4 as long as the blade group 4 is lowered by the elevating mechanism 2.

However, as shown in fig. 17 (b), when the handle 33 of the angle conversion mechanism 3 is pulled by the stroke S in a state where the entire blade group 4 is raised, the conversion string 30A (30C) extending from the upper beam 6 is pulled up, and the redundant portion disappears. At this time, since the tension directed downward does not act on the switching cord 30A (30C), the function of the stopper 32 for the switching cord to prevent free fall does not work.

When the blade group 4 is lowered by the elevating mechanism 2 in this state, if the switching cord 30A (30C) is slightly lowered together with the vertical cords 10A and 10b, the function of the switching cord stopper 32 to prevent free fall is exerted, and tension is generated in the switching cord 30A (30C) from the switching cord stopper 32 to the vertical cord 10A side. As a result, as shown in fig. 18 (a), only the vertical cord 10B on the side of the lift cord 20A (20B, 20C) descends, and the vertical cord 10A on the side of the switching cord 30A (30C) does not descend due to the action of the switching cord 30A (30C).

Therefore, it is necessary to release the function of the stopper 32 for the switching cord to prevent free fall, and to loosen the switching cord 30A (30C). However, the switching cord 30A (30C) from the switching stopper 32 to the handle 33 side is slack, and the tension is not applied thereto.

Therefore, even if the handle 33 is moved up and down, the function of the stopper 32 for the conversion cord to prevent free fall cannot be released. In this case, as shown in fig. 18 (b), the handle balancer 34 is pulled greatly away from the handle 33. Thus, the slack state of the switch cord 30A (30C) from the switch stopper 32 to the handle 33 side is eliminated, and the switch cord 30A (30C) can be pulled toward the handle 33 side with respect to the switch cord stopper 32, and the function of preventing free fall of the switch cord stopper 32 can be released.

Thereby, the switching cord 30A (30C) coming out of the upper beam 6 is loosened, and as shown in fig. 19, the vertical cord 10A on the switching cord 30A (30C) side descends together with the vertical cord 10B on the lift cord 20A (20B, 20C) side, and the entire blade group 4 falls, so that the horizontal blind returns to the initial state shown in fig. 12.

In the present embodiment, the blade group 4 is supported by the direction control string 1A (1C) and the switching string 30A (30C). These cords therefore correspond to the "blade support cords" of the claims.

(second embodiment)

Next, a second embodiment of the present invention will be explained. Fig. 20 is a schematic view showing a horizontal blind according to a second embodiment of the present invention. In the first embodiment described above, the stopper 32 for the conversion cord of the angle conversion mechanism 3 is provided inside the upper beam 6, but in the present embodiment, as shown in fig. 20, the stopper 32' for the conversion cord is attached to the handle 33 of the angle conversion mechanism 3. That is, as shown in fig. 20, the stopper 32 for the switching cord used in the first embodiment is eliminated, and a stopper 32' for the switching cord that can be operated in a state where the handle 33 is held by hand is provided in the handle 33.

Fig. 21 is a sectional view for explaining the stopper 32' for a switching cord. As shown in fig. 21, the handle 33 of this embodiment is also slidably fitted to the outside of the operation rod 14 of the angle adjustment mechanism 1 as in the first embodiment, and the handle balancer 34 is fitted to the lower end portion of the handle 33 so as to be movable in and out. The stopper 32' for the conversion cord is constituted by a pair of levers 35, 35 and the retaining member 14B of the operation rod 14.

Specifically, a pair of elongated holes 33d, 33d are opened at positions facing each other on the circumferential surface of the handle 33, and leaf springs 36, 37 are attached to the upper and lower portions of each elongated hole 33 d. The rods 35 are attached to leaf springs 36 and 37 attached to the long holes 33d, and outward forces are applied to the upper portion 35a and the lower portion 35b of the rods 35 by the leaf springs 36 and 37. Thus, when the lower portion 35B of each lever 35 is pressed inward against the urging force of the plate spring 37 as indicated by arrow a, the upper portion 35a of each lever 35 is pushed outward by the urging force of the plate spring 36 as indicated by arrow B.

Here, the function of the stopper 32' for a shift rope will be explained. Fig. 22 is a sectional view for explaining the function of the stopper 32' for a switching cord. In fig. 20, when the lower blade group 4A is closed, the handle 33 is slid downward by the stroke S. Then, as shown in fig. 22 (a), the end wall 33A of the handle 33 engages with the retaining member 14B of the operation rod 14, and in fig. 20, the switching ropes 30A and 30C connected to the vertical rope 10A are raised, the vertical rope 10A is pulled up by the stroke S, and the lower blade group 4A is brought into the closed state.

At this time, the lower blade group 4A and the lower beam 60 try to fall due to their own weight, and therefore the conversion ropes 30A and 30C coming out from the upper beam 6 are pulled downward. Since the handle 33 is connected to the switching rope 30A (30C) via the handle balancer 34, the handle 33 is pulled upward in fig. 22 (a), and the lower blade group 4A may possibly return to the open state. However, in a state where the handle 33 is pulled down by the stroke S, the upper portion 35a of each lever 35 engages with the retaining member 14B of the operation rod 14 from below. Therefore, the function of the stopper 32' for the conversion cord to prevent free fall is activated, and the handle 33 is prevented from rising, and the closed state of the lower blade group 4A is maintained.

When the lower blade group 4A is returned to the open state, as shown in fig. 22 (b), the lower portion 35b of each lever 35 is pressed against the urging force of the leaf spring 37. Thereby, the upper portion 35a of each lever 35 is pushed outward by the urging force of the plate spring 36, and the engagement with the retaining member 14B of the operation rod 14 is released, and the function of preventing the free fall of the conversion rope stopper 32' is released. As a result, in fig. 20, the lower blade group 4A returns to the original open state as the handle 33 is raised by the free fall of the lower blade group 4A and the lower beam 60.

When the switching ropes 30A and 30C are further pulled downward from the state shown in fig. 22 (b), the handle balancer 34 is pulled downward away from the handle 33 as shown in fig. 22 (C). Other configurations, operations, and effects are the same as those of the first embodiment, and therefore, description thereof is omitted.

(third embodiment)

Next, a third embodiment of the present invention will be explained. Fig. 23 is a perspective view showing a main part of a horizontal blind according to a third embodiment of the present invention. As shown in fig. 23, in the horizontal blind of the present embodiment, a plurality of loop portions 38 are attached to the vertical cords 10A connected to the switching cord 30A (30C). Specifically, the plurality of loop portions 38 are attached to the longitudinal ropes 10a at fixed intervals from the upper beam 6 (see fig. 1) to the vicinity of the uppermost blade 40 of the lower blade group 4A. A hook portion 39 is provided at a lower end which is one end of the switching cord 30A (30C), and after the switching cord 30A (30C) passes through the plurality of ring portions 38, the hook portion 39 is locked to the lowermost ring portion 38, whereby the switching cord 30A (30C) is connected to the vertical cord 10A.

With this configuration, since the switching cord 30A (30C) passes through the plurality of loop portions 38, the switching cord 30A (30C) hangs down long without slackening when the blade group 4 is raised by the raising and lowering mechanism 2. Further, the plurality of ring portions 38 are attached to the entire vertical string 10a at fixed intervals, and the hook portions 39 are locked to the ring portions 38 at desired positions, whereby the lower blade group 4A having a desired number of layers can be operated. Other configurations, operations, and effects are the same as those of the first and second embodiments, and therefore, description thereof is omitted.

(fourth embodiment)

Next, a fourth embodiment of the present invention will be explained. Fig. 24 is a perspective view showing a main part of a horizontal blind according to a fourth embodiment of the present invention. As shown in fig. 24, in the horizontal louver of the present embodiment, a notch 41 is provided at one end portion in the width direction of each louver 40. Specifically, the notch 41 is formed at the blade end portion of the direction control cord 1A (1C) on the side of the longitudinal cord 10b, and the switching cord 30A (30C) is connected to the longitudinal cord 10A of the direction control cord 1A (1C). Other configurations, operations, and effects are the same as those of the first to third embodiments, and therefore, the description thereof is omitted.

(fifth embodiment)

Next, a fifth embodiment of the present invention will be described.

In the fully closed state shown in fig. 13, when the operation rod 14 is rotated in the direction to open the blade group 4, the blade group 4 rotates to become the open state shown in fig. 12, and when the operation rod 14 is further rotated in the same direction, the blade group 4 rotates to become the reverse fully closed state shown in (a) of fig. 16. As described above, when the blade group 4 is rotated from the fully closed state to the reverse fully closed state, there is a problem that: when the user inadvertently pulls the handle 33 downward, there is a case where the entire blade group 4 is not completely closed in the reverse direction, but the upper blade group 4B is completely closed in the reverse direction and the lower blade group 4A is opened as shown in fig. 16 (B).

The present embodiment is different in that a handle displacement suppressing portion for suppressing displacement of the handle 33 with respect to the operation rod 14 is provided in order to solve the above-described problem. The other configurations of the present embodiment are the same as those of the first embodiment.

The handle displacement suppressing portion may have a function of suppressing the relative position of the handle 33 with respect to the operation rod 14 from the state of fig. 9 (a) to the state of fig. 9 (b), and specifically, may include a biasing mechanism (for example, a coil spring) provided in the handle 33, or a snap-in structure in which the handle 33 and the operation rod 14 are engaged with each other in a snap-in manner.

When the coil spring is disposed in the handle 33, for example, the following arrangement can be provided: one end of the coil spring abuts against an end wall 33A of the handle 33 shown in fig. 9 (a), and the other end abuts against a retaining member 14B attached to the operation rod 14.

(sixth embodiment)

Next, a sixth embodiment of the present invention will be described with reference to fig. 25. The present embodiment is similar to the first embodiment, and the following description focuses on differences.

In the present embodiment, as shown in fig. 25, the vertical strings 10A of the direction control string 1A are disconnected at a position between the upper-stage blade group 4B and the lower-stage blade group 4A, and the switching string 30A is connected to the vertical string 10A at a connection point 66 near the uppermost-stage blade that supports the vertical string 10A of the lower-stage blade group 4A.

In addition, the following description will be given by taking the direction control cord 1A and the related components (the switching cord 30A, the roller 31A, and the like) as an example, but the same description applies to the direction control cord 1C and the related components. In the drawings used in the description of the sixth to ninth embodiments, the elevating mechanism 2 is not shown, and the switching operation unit is shown in a simplified manner.

In the first embodiment, since the maximum distance between adjacent blades is defined by the interval of the lateral ropes 10c supporting the blades 40 of each layer, the lower blade group 4A cannot be rotated so that the distance between adjacent blades 40 is greater than the interval of the adjacent lateral ropes 10 c. However, in the present embodiment, since the vertical cords 10a are disconnected, the maximum distance between the adjacent blades 40 on the vertical cord 10a side is not limited by the interval between the adjacent horizontal cords 10 c. Therefore, in the present embodiment, as shown in fig. 25, the lower blade group 4A can be brought into a completely closed state in a reverse direction while the blades 40 of the upper blade group 4B are brought into a horizontal state.

In the present embodiment, the upper blade group 4B can adjust the tilt angle by rotating the drum 11A, and the lower blade group 4A can adjust the tilt angle by rotating the drum 11A and operating the switching rope 30A.

In the present embodiment, the blade group 4 is supported by the direction control cord 1A and the switching cord 30A. These cords therefore correspond to the "blade support cords" of the claims.

Instead of the vertical string 10A, the vertical string 10b may be disconnected and the switching string 30A may be connected to the vertical string 10 b.

(seventh embodiment)

Next, a seventh embodiment of the present invention will be described with reference to fig. 26. This embodiment is similar to the sixth embodiment, and the following description focuses on differences.

In the present embodiment, as shown in fig. 26, the conversion cord 30A is connected to the underbeam 60 instead of connecting the conversion cord 30A to the longitudinal cord 10A of the direction control cord 1A at the connection point 66. Between the switching rope 30A and the vertical rope 10b, a lateral rope 10e is provided at the same interval as the lateral rope 10c of the direction control rope 1A, and the blade 40 of the lower blade group 4A is supported by the lateral rope 10 e.

Instead of the vertical cord 10A, the vertical cord 10b may be cut off, and the lateral cord 10e may be provided between the vertical cord 10A and the switching cord 30A.

(eighth embodiment)

Next, an eighth embodiment of the present invention will be described with reference to fig. 27. This embodiment is similar to the seventh embodiment, and the following description focuses on differences.

In the present embodiment, as shown in fig. 27, the direction control rope 1A supports only the upper blade group 4B. A center sill 53 is provided at the lower end of the direction control rope 1A. The switching rope 30A is connected to the lower beam 60. An auxiliary rope 52 having one end connected to the upper beam 6 and the other end connected to the lower beam 60 is provided, a lateral rope 10f is provided between the switching rope 30A and the auxiliary rope 52 at the same interval as the lateral rope 10c of the direction control rope 1A, and the blade 40 of the lower blade group 4A is supported by the lateral rope 10 f.

In the present embodiment, the upper blade group 4B can adjust the inclination angle by rotating the drum 11A, and the lower blade group 4A can adjust the inclination angle by operating the switching rope 30A. As in the first embodiment, the lower blade group 4A can be raised or lowered by the raising/lowering mechanism 2. When the lower beam 60 is raised, the upper blade group 4B can be raised by pushing up the center beam 53 and the upper blade group 4B, and the upper blade group 4B can be lowered by lowering the lower beam 60. In this case, the center sill 53 may be omitted. Further, the following may be configured: an additional lift cord is provided on the center sill 53 so that the upper blade group 4B can be independently raised or lowered.

In the present embodiment, the blade group 4 is supported by the direction control cord 1A, the switching cord 30A, and the auxiliary cord 52. These cords therefore correspond to the "blade support cords" of the claims.

The auxiliary cord 52 and the switching cord 30A may be arranged in a pair, the switching cord 30A may be arranged on the side of the vertical cord 10b, and the auxiliary cord 52 may be arranged on the side of the vertical cord 10A.

(ninth embodiment)

Next, a ninth embodiment of the present invention will be described with reference to fig. 28 to 31. The present embodiment is similar to the first embodiment, and the following description focuses on differences.

The present embodiment is characterized by the following aspects: the blade group 4 includes an upper blade group 4B, a middle blade group 4C, and a lower blade group 4A, and the angles of the middle blade group 4C and the lower blade group 4A can be changed using the dual-system angle conversion mechanisms 64 and 65. The middle blade group 4C is constituted by a plurality of blades 40 arranged between the upper blade group 4B and the lower blade group 4A. The angle conversion mechanism 64 of the first system is the same as that of the first embodiment, but the conversion string 30A is connected to the longitudinal string 10A at a connection point 62 near the uppermost blade of the middle blade group 4C. The angle conversion mechanism 65 of the second system has the same configuration as the angle conversion mechanism 64 of the first system, but the conversion string 30A is connected to the longitudinal string 10b at a connection point 63 near the uppermost blade of the lower blade group 4A.

Here, a specific example in which the angles of the middle blade group 4C and the lower blade group 4A are changed by using the angle conversion mechanisms 64 and 65 will be described.

In the example shown in fig. 29 (a), in a state where all the blades are horizontal, the connection point 63 is pulled upward by operating the angle conversion mechanism 65, and only the lower blade group 4A is tilted in the reverse full closing direction.

In the example shown in fig. 29 (b), in a state where all the blades are horizontal, the connection point 62 is pulled upward by operating the angle conversion mechanism 64, and only the middle blade group 4C is tilted in the fully closing direction.

In the example shown in fig. 30, in a state where all the blades are inclined in the fully closing direction as shown in fig. 30 (a), the connection point 63 is pulled upward by operating the angle conversion mechanism 65, and only the lower blade group 4A is inclined in the fully closing direction in the opposite direction as shown in fig. 30 (b).

In the example shown in fig. 31, in a state where all the blades are inclined in the reverse full close direction as shown in fig. 31 (a), the connection point 62 is pulled up by operating the angle conversion mechanism 64, and the middle-stage blade group 4C and the lower-stage blade group 4A are inclined in the full close direction as shown in fig. 31 (b).

In the state of fig. 31 (b), the connection point 63 is pulled upward by operating the angle conversion mechanism 65, and only the lower blade group 4A is tilted in the reverse full close direction as shown in fig. 31 (c).

As a result, as shown in fig. 31 (C), the upper blade group 4B and the lower blade group 4A are inclined in the fully closing direction in the opposite direction, and the middle blade group 4C is inclined in the fully closing direction.

Further, the angle conversion mechanisms 64 and 65 may be arranged in a manner such that the connection point 62 is provided on the vertical string 10b and the connection point 63 is provided on the vertical string 10 a.

The present invention is not limited to the above-described embodiments, and various modifications and changes may be made within the scope of the present invention. For example, although the above embodiment has been described as an example in which the switching cords 30A and 30C are inserted into the operation rod 14 and then connected to the handle balancer 34 of the handle 33, the horizontal blind having the following configuration is also included in the scope of the present invention: the other end portions of the conversion strings 30A and 30C are pulled out to the outside of the upper beam 6 from a predetermined position independent of the operation rod 14 without providing the handle 33 or the handle balancer 34, and the conversion strings 30A and 30C on the outside can be pulled or loosened.

Further, a horizontal louver having the following structure is also included in the scope of the present invention: the switching cords 30A and 30C are inserted into the operation rod 14 of the angle adjustment mechanism 1 without using the handle 33 or the handle balancer 34, and the switching cords 30A and 30C pulled out from the lower end of the operation rod 14 can be pulled or loosened.

Further, a horizontal blind having the following configuration is also included in the scope of the present invention: instead of using the handle balancer 34, the conversion cords 30A and 30C are inserted into the operation rod 14 of the angle adjustment mechanism 1, and the ends of the conversion cords 30A and 30C are directly connected to the lower end of the handle 33.

In the third embodiment, the hook portion 39 is not provided at the lower end of the conversion string 30A (30C), and the conversion string 30A (30C) may be directly connected to the lowermost loop portion 38 or the vertical string.

In the above embodiment, the angular shaft 12 is exemplified by a shaft having a hexagonal cross section, but the present invention is not limited thereto, and any shaft having a cross section of a triangle or more can be used as the angular shaft 12.

Further, although the second embodiment has been described above with reference to the structure in which the leaf springs 36 and 37 apply outward forces to the respective levers 35, a part of the resin handle 33 may be formed in substantially the same shape as the leaf springs 36 and 37 without using the leaf springs 36 and 37, and a biasing force may be generated to the respective levers 35 by the elasticity of the resin.

Claims

1. A horizontal blind, comprising: a blade group comprising a plurality of blades is rotatably supported by a blade support line suspended from an upper beam, and a lower beam is vertically supported by a vertical lift line suspended from the upper beam, the horizontal blind is characterized in that,

the blade group includes an upper blade group and a lower blade group, the upper blade group is composed of a plurality of blades including an uppermost blade, and the lower blade group is composed of a plurality of blades arranged below the upper blade group;

the horizontal louver includes an angle conversion mechanism capable of converting an angle of the lower blade group and an angle adjustment mechanism capable of adjusting the angle of the blade group to a predetermined angle,

the angle conversion mechanism includes a conversion rope having one end side supporting the lower blade group and the other end side passing through the inside of the upper beam, and a conversion operation portion capable of performing an operation of introducing or pulling out the conversion rope into or from the upper beam,

the conversion operating portion of the angle conversion mechanism is fitted outside the operating portion of the angle adjustment mechanism in a relatively sliding manner.

2. The horizontal blind of claim 1,

the blade supporting ropes are direction control ropes formed by a pair of longitudinal ropes and a plurality of transverse ropes, one ends of the direction control ropes are connected to the lower beam;

the angle adjustment mechanism is configured to be capable of adjusting the angle of the blade group to a predetermined angle by rotating a spool to which the other end of the pair of longitudinal strings is attached by an operation unit to move one of the pair of longitudinal strings up and down relative to the other of the pair of longitudinal strings,

the horizontal blind further comprises a lifting mechanism, wherein the lifting mechanism can lift or lower the blade group by leading one end of a lifting rope connected with the lower beam and the other end of the lifting rope penetrating through the inner part of the upper beam into or out of the upper beam;

the one end of the conversion rope is connected to a portion of one of the pair of longitudinal ropes and is located near the uppermost blade in the lower blade group.

3. The horizontal blind of claim 2,

the operation part of the angle adjusting mechanism is a cylindrical operation rod with one end part installed on the outer side of the upper beam and capable of rotating and operating the winding drum,

the conversion operation portion of the angle conversion mechanism is the other end portion side of the conversion rope, wherein the conversion rope is drawn out to the outside of the upper beam after passing through the inside of the upper beam, and is inserted into the operation rod from one end portion side of the operation rod.

4. The horizontal blind of claim 3,

the cylindrical handle is slidably fitted to the outside of the operating rod so that a projection provided on the inside of one end portion of the handle engages with a projection provided on the outside of the other end portion of the operating rod, and the other end of the conversion cord pulled out from the other end portion of the operating rod is connected to the other end portion side of the handle.

5. The horizontal blind of claim 4,

a cover member is fitted into the opening on the other end side of the handle so as to be freely movable in and out, and the other end of the conversion cord is connected to the cover member.

6. A horizontal blind according to any one of claims 2 to 5,

a notch is provided at one end in the width direction of the blade,

the one end of the conversion cord is connected to a longitudinal cord of the pair of longitudinal cords that is located opposite to the cut portion.

7. A horizontal blind according to any one of claims 2 to 5,

the conversion rope passes through the space between the upper layer blade and the transverse rope from one side direction, then passes through the space between the blade and the transverse rope from the other side direction at the position of the lower layer blade than the blade, so as to be woven into the transverse rope, and then one end of the conversion rope is connected to the longitudinal rope.

8. A horizontal blind according to any one of claims 2 to 5,

a plurality of ring parts are arranged on the vertical rope connected with the conversion rope at a predetermined interval from the position of the connection conversion rope to the upper beam side,

the conversion rope passes through the plurality of ring parts and then the one end is connected to the longitudinal rope.

9. The horizontal blind as recited in claim 8,

a hook portion is provided at one end of the switching cord, and the hook portion is detachably locked to a ring portion located at a connection position of the switching cord.