CN109154179B - Delay unit, cord support device, and horizontal blind - Google Patents

Abstract

The invention provides a delay unit of a rope supporting component, a rope supporting device and a horizontal shutter with the delay unit and the rope supporting device, wherein the delay unit and the rope supporting device can realize the lifting and the tilting operation of blades by using one driving shaft in a form with excellent practicability; further, a horizontal blind window which makes the friction resistance of the direction control rope to be hung on the inclined roller appropriate; the delay unit (5a) of the present invention is arranged on the driving shaft (11) side by side at the outer side or the inner side of the supporting housing (50) to make the winding shaft (52) rotate in linkage with the rotation of the inclined roller (51) by a specified delay amount, wherein, the supporting housing (50) supports the inclined roller (51) and the winding shaft (52) in a manner of rotating by using one driving shaft (11) as a rotating shaft; the delay unit (5a) in the rope support device (5) of the present invention is configured to be directly or indirectly connected with a bearing portion of the winding shaft (52); the horizontal blind according to the present invention is provided with a cord support device having inclined rollers configured to hook a plurality of annular upper end portions of the direction control cord.

Description

Delay unit, cord support device, and horizontal blind

Technical Field

The present invention relates to a delay unit of a cord support member, which can perform a raising and lowering operation and a tilting operation of a blade by using one drive shaft, a cord support device, and a horizontal blind including the delay unit and the cord support device.

Background

The horizontal blind can adjust the amount of sunlight entering the room by raising or lowering or tilting the plurality of layers of blades supported by the direction control cords suspended from the upper beam using the raising/lowering cords.

For example, a lower beam is disposed at the lower end of the direction control rope, and the lower beam is raised or lowered by introducing or withdrawing a lift rope fixed to the lower beam into or from the upper beam, thereby raising or lowering the multi-layer blade.

In addition, as a type of horizontal blind, it is known to use a cord support member that enables rotation operations of a tilt drum, which suspends a support direction control cord, and a winding shaft, which suspends and supports a lift cord so as to be able to wind or unwind, with a single drive shaft.

In the general rope support member capable of performing the rotation operation of the tilting roller and the windup shaft by one drive shaft as described above, even when the tilting operation without causing the lifting and lowering of the blade is desired, the lower beam is lifted or lowered by the tilting operation. In particular, in the case where the underbeam is at a position other than the lowest position, the folded portion of the blade is tilted after being raised when the tilting operation is performed, and there is a problem that improvement should be made from the viewpoint of operability.

Therefore, the following technology is disclosed for the string supporting member: the inclined drum and the take-up shaft are engaged with each other with a play provided by the respective protrusions, and the rotation of the take-up shaft is delayed with respect to the rotation of the inclined drum (see, for example, patent document 1).

More specifically, in the case of the rope support member (mechanism housing box) in the technique of patent document 1, a tilt roller (rotating tilt roller) is directly connected to a drive shaft so as to rotate together with the rotation of the drive shaft, and a shaft member (bush) is newly provided and fixed to the rope support member. The shaft member is provided with a brake drum and a clutch ring at one end thereof, and is disposed between the tilting drum and the winding shaft (up-down drum). The windup shaft is engaged with the peripheral edge of the cylindrical portion of the shaft member protruding from the brake drum so as to be able to rotate idly, and is engaged with the inclined drum through the respective protrusions so as to rotate together with an idle gap of 180 degrees. Therefore, since the take-up shaft is not directly connected to the drive shaft, a certain amount of idle gap can be provided for the rotation of the take-up shaft with respect to the rotation of the inclined drum, and the rotation of the take-up shaft can be delayed.

In addition, as one form of the rope support device, the upper end portion of the direction control rope is formed in a ring shape and is hung on the tilt drum to hang the direction control rope, so that the blade supported by the lateral rope of the direction control rope is rotated by the rotation of the tilt drum. In this aspect of the rope support device, in order to transmit the rotation of the tilt drum to the movement of the direction control rope, a predetermined frictional resistance needs to be generated between the tilt drum and the annular upper end portion of the direction control rope. Therefore, a technique is known in which a friction member is provided at a part of the annular upper end portion of the direction control cord (see, for example, patent document 2).

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese unexamined patent publication No. Hei 3-161685

Patent document 2: japanese Kokai, Sho 39-12438

As described above, in a general rope support member capable of performing a rotation operation of a tilting drum and a winding shaft by one drive shaft, even when a tilting operation that does not cause lifting and lowering of a blade is desired, the lower beam is lifted or lowered by the tilting operation, or when the lower beam is at a position other than the lowest position, a folded portion of the blade is lifted and then tilted when the tilting operation is performed, and therefore, there is a problem in terms of operability.

On the other hand, although the technique of patent document 1 can solve this problem, the technique of patent document 1 is configured such that the inclined drum and the take-up shaft are engaged with each other with a play provided by the respective protrusions in order to retard the rotation of the take-up shaft with respect to the rotation of the inclined drum. Therefore, when a plurality of rope support members are provided in the upper frame, it is expected that the rope support members need to be repeatedly assembled a plurality of times in order to align the rope support members with respect to one drive shaft (adjustment of the blade angle, adjustment of the rope length, or the like), and the relative positional relationship between the tilt roller and the winding shaft needs to be adjusted every time, so that there is a concern about the ease of assembly into the upper frame.

Further, in the technique of patent document 1, since the winding shaft is configured to be idly fitted around the periphery of the cylindrical portion of the shaft member, it is difficult to reduce the size of the device, and the cord support member as a whole has a large diameter, which may increase the cost of the cord support member or the horizontal blind.

Further, the technique of patent document 1 only discloses a configuration in which the retardation angle is 180 degrees, and if the configuration is used for applications other than 180 degrees, it is necessary to change at least the shapes of the tilt drum, the winding shaft, and the clutch ring, and it is necessary to prepare a cord support member in which the shapes of the tilt drum, the winding shaft, and the clutch ring are changed for each application of the horizontal blind, resulting in an increase in cost.

In the technique of patent document 1, when the adjustment or the change of the delay angle is desired at the time of assembly, the entire cord support member is replaced. Therefore, it is possible to increase the burden of component management.

Therefore, it is desired to obtain a technique that can realize the rotation operation of the tilting drum and the winding shaft by one drive shaft, and that can solve the following two problems, which contribute to the improvement of the assembling property, the miniaturization, the generalization, the reduction of the part management burden, and the reduction of the cost, and is excellent in the practicality: even in the case where a tilting operation that does not cause the lifting of the blade is desired, there are a problem that the underbeam is lifted or lowered due to the tilting operation, and a problem that the folded portion of the blade is lifted and then tilted when the tilting operation is performed with the underbeam in a non-lowermost position.

In the case of the rope support device in which the upper end portion of the direction control rope is formed in a ring shape and is hung on the tilt drum to suspend the direction control rope, and the blade supported by the lateral rope of the direction control rope is rotated by the rotation of the tilt drum, in the technique of providing the friction member to the direction control rope as shown in patent document 2, the friction member changes between a contact state and a non-contact state due to the rotation of the tilt drum, and therefore, there is a possibility that the contact between the friction member and the tilt drum is insufficient due to the swing of the direction control rope or the like, and the rotation failure of the blade is caused.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a delay unit of a string support member, a string support device, and a horizontal blind including the delay unit and the string support device, which can perform lifting and tilting operations of a blade by using one drive shaft in a practical form.

Another object of the present invention is to provide a horizontal blind that is suitable for frictional resistance involved in hanging a direction control cord in a cord supporting device including an inclined drum configured to hang an annular upper end portion of the cord.

The delay unit of the present invention is a delay unit of a rope support device capable of performing a lifting and tilting operation of a blade using one driving shaft, characterized in that: the delay unit is provided on the drive shaft in parallel outside or inside a support housing that supports the inclined drum and the take-up shaft so as to be rotatable with one drive shaft as a rotation shaft, respectively, so that the take-up shaft is rotated in conjunction with the rotation of the inclined drum by a predetermined delay amount.

The rope support device of the present invention is characterized by including the delay unit.

In addition, the rope support apparatus of the present invention is capable of performing a blade lifting and tilting operation using one driving shaft, and is characterized in that: comprises an inclined roller, a winding shaft, and a delay unit; the inclined roller takes a driving shaft as a rotating shaft and is directly connected to the driving shaft; the winding shaft is indirectly connected with the driving shaft; the delay unit is configured to: the winding shaft has an output shaft portion that rotates in conjunction with the rotation of the drive shaft by a predetermined delay amount, and the output shaft portion is directly or indirectly connected to the bearing portion of the winding shaft.

Further, the rope support device of the present invention is characterized in that: the delay unit is configured to associate a rotation transmission position where the predetermined delay amount occurs with the axial direction of the drive shaft.

Further, the rope support device of the present invention is characterized in that: the delay unit is configured to associate a rotation transmission portion where the predetermined delay amount occurs with the drive shaft in a direction perpendicular to the drive shaft.

Further, the rope support device of the present invention is characterized in that: the delay unit is provided with an input shaft component, an output shaft component, a brake component and a shell component; said input shaft member being directly connected to said drive shaft; the output shaft member has an output shaft portion that rotates in conjunction with the rotation of the input shaft member by the predetermined delay amount to transmit the rotation, and is engaged with the input shaft member with a play of a predetermined rotation angle; the brake member suppresses rotation of the output shaft member other than the rotation transmitted from the input shaft member; the housing member houses the input shaft member, the output shaft member, and the brake member.

Further, the rope support device of the present invention is characterized in that: the brake member has a coil-shaped brake spring and a spring housing; a brake spring having a pair of end portions engaged with a portion of the output shaft member and allowing rotation to be transmitted from the input shaft member to the output shaft member; the spring housing is locked in a housing member of the delay unit, and accommodates the brake spring in a reduced diameter state.

Further, the rope support device of the present invention is characterized in that: a rotation relay plate that is further provided between the input shaft member and the output shaft member and that is configured to be rotated by a predetermined delay amount, thereby making it possible to change the delay amount caused by the engagement between the input shaft member and the output shaft member.

Further, the rope support device of the present invention is characterized in that: the housing member of the delay unit is formed by fitting a plurality of members in a direction perpendicular to the drive shaft.

Further, the rope support device of the present invention is characterized in that: the delay unit is configured to be connected to a bearing portion of the winding shaft via an obstacle detection stop device.

Further, the rope support device of the present invention is characterized in that: the amount of rotation by which the retard amount is generated by the retard unit is set to be equal to or greater than the angular adjustment range of the blade.

Further, the rope support device of the present invention is characterized in that: the housing member of the delay unit has a claw portion for gripping the support housing of the rope support device or the support auxiliary member of the winding shaft.

Further, the rope support device of the present invention is characterized in that: the output shaft portion of the delay unit has a locking portion for direct or indirect connection with the bearing portion of the winding shaft.

The horizontal blind of the present invention is characterized by including the cord support device of the present invention.

Further, a horizontal blind according to the present invention is a horizontal blind in which a plurality of winding shafts constituting a cord winding device wind or unwind a lifting cord in accordance with rotation of one driving shaft to thereby enable a lifting operation of a vane, and a direction control cord is suspended from a plurality of tilt drums, and the plurality of tilt drums are rotated by rotation of the driving shaft to thereby enable an angle of the vane supported by the direction control cord to be adjusted, the horizontal blind including: when the blade is turned over after the lifting operation of the blade, the rotation of the driving shaft is transmitted to a tilting drum, and the rotation of a winding shaft during the angle adjustment of the blade is prevented, the driving shaft and the winding shaft rotate in conjunction after a predetermined relative rotation, and a braking device is separately provided from the rope winding shaft device, so that the rotation of the winding shaft during the angle adjustment of the blade is prevented, wherein the braking device is supported in an upper beam that houses the rope winding device and the tilting drum in a non-rotatable manner.

Further, a horizontal blind according to the present invention is a horizontal blind in which a plurality of winding shafts constituting a cord winding device wind or unwind a lifting cord in accordance with rotation of one driving shaft to thereby enable a lifting operation of a vane, and a direction control cord is suspended from a plurality of tilt drums, and the plurality of tilt drums are rotated by rotation of the driving shaft to thereby enable an angle of the vane supported by the direction control cord to be adjusted, the horizontal blind including: a plurality of delay units provided on the drive shaft in parallel with the plurality of winding shafts, respectively, for causing the winding shafts to rotate in conjunction with the rotation of the inclined drum by a predetermined delay amount; an opening with a first length is formed on the top surface of an upper beam for containing the winding shaft and the inclined roller along the front-back direction, and a containing space with a second length is arranged in the upper beam, wherein the second length is larger than the first length; the plurality of delay units respectively have the following shapes: that is, when the delay unit is inserted from the top surface of the upper beam in which the opening having the first length is formed when the delay unit is assembled into the upper beam, and when the delay unit is rotated so as to face the plurality of winding shafts to be connected to the drive shaft in a direction in which the plurality of winding shafts are arranged side by side, the plurality of delay units are restrained from being displaced in the front-rear direction and the vertical direction with respect to the upper beam by the storage space having the second length in the upper beam.

Further, a horizontal blind according to the present invention is a horizontal blind in which a plurality of winding shafts constituting a cord winding device wind or unwind a lifting cord in accordance with rotation of one driving shaft to thereby enable a lifting operation of a vane, and a direction control cord is suspended from a plurality of tilt drums, and the plurality of tilt drums are rotated by rotation of the driving shaft to thereby enable an angle of the vane supported by the direction control cord to be adjusted, the horizontal blind including: a plurality of delay units provided on the drive shaft in parallel with the plurality of winding shafts, respectively, for causing the winding shafts to rotate in conjunction with the rotation of the inclined drum by a predetermined delay amount; an opening with a first length is formed on the top surface of an upper beam for containing the winding shaft and the inclined roller along the front-back direction, and a containing space with a second length is arranged in the upper beam, wherein the second length is larger than the first length; the plurality of delay units respectively have the following shapes: that is, when the delay unit is inserted from the top surface of the upper beam in which the opening having the first length is formed when the delay unit is assembled into the upper beam, and when the delay unit is rotated so as to face the plurality of winding shafts to be connected to the drive shaft in a direction in which the plurality of winding shafts are arranged side by side, the plurality of delay units are restrained from being displaced in the front-rear direction and the vertical direction with respect to the upper beam by the storage space having the second length in the upper beam.

Further, a horizontal blind according to the present invention is a horizontal blind in which a plurality of winding shafts constituting a cord winding device wind or unwind a lifting cord in accordance with rotation of one driving shaft to thereby enable a lifting operation of a vane, and a direction control cord is suspended from a plurality of tilt drums, and the plurality of tilt drums are rotated by rotation of the driving shaft to thereby enable an angle of the vane supported by the direction control cord to be adjusted, the horizontal blind including: a plurality of delay units provided on the drive shaft in parallel with the plurality of winding shafts, respectively, for causing the winding shafts to rotate in conjunction with the rotation of the inclined drum by a predetermined delay amount; each of the plurality of delay units is configured to: when the elevator system is assembled in an upper frame that houses the winding shaft and the tilt drum, the state of the plurality of delay units can be initialized by simply inserting the drive shaft into the shaft centers of the plurality of delay units, the plurality of winding shafts, and the plurality of tilt drums, and then simply rotating the drive shaft a predetermined number of turns or more, and the positioning of the fixing positions of the lift cords to the winding shafts can be realized.

Further, a horizontal blind according to another aspect of the present invention is a horizontal blind in which a vane is rotatable by rotating a direction control cord in accordance with rotation of a tilt drum, the horizontal blind including: the rope support device is provided with a rope support device, and the rope support device is configured as follows: a pair of direction control ropes on the indoor side and the outdoor side form a plurality of annular upper end parts and are hung on the outer peripheral surface formed on the inclined roller by a predetermined friction force.

Another aspect of the present invention provides a horizontal blind comprising: the upper end of the direction control rope hanging on the indoor side is hung on the outer circumferential surface of the inclined roller from the indoor side and then is locked on the direction control rope hanging on the outdoor side; the upper end of the direction control rope hanging down on the outdoor side is hung on the outer circumferential surface of the inclined roller from the outdoor side, and then is locked on the direction control rope hanging down on the indoor side.

Another aspect of the present invention provides a horizontal blind comprising: the upper end of the direction control rope hanging on the indoor side is hung on the outer circumferential surface of the inclined roller from the indoor side and then is locked on the direction control rope hanging on the outdoor side; the upper ends of the direction control ropes hanging on the outdoor side are hung on the outer peripheral surface of the inclined drum from the outdoor side, and then are wound along the topmost transverse rope arranged between the pair of direction control ropes and are locked on the direction control ropes hanging on the outdoor side.

Another aspect of the present invention provides a horizontal blind comprising: the upper end of the direction control rope hanging on the indoor side is hung on the outer peripheral surface of the inclined drum for the first time from the indoor side, then is wound along the transverse rope arranged at the topmost layer between the pair of direction control ropes, is hung on the outer peripheral surface for the second time, and then is clamped on the direction control rope hanging on the outdoor side; the upper end of the direction control rope hanging down on the outdoor side is clamped on the rope part when the direction control rope hanging down on the indoor side is hung for the first time.

Another aspect of the present invention provides a horizontal blind comprising: the locking positions of the upper ends of the pair of direction control ropes on the indoor side and the outdoor side are arranged on the outdoor side.

(effect of the invention)

According to the present invention, it is possible to realize the rotation operation of the tilting drum and the winding shaft by one drive shaft, and it is possible to solve the problem that the lower beam is raised or lowered by the tilting operation when the tilting operation without raising or lowering the blade is desired, and particularly, it is possible to solve the problem that the blade folded portion is raised and then tilted when the tilting operation is performed with the lower beam at a position other than the lowest position, which contributes to improvement of the assembling property, downsizing, generalization, reduction in the burden of parts management, and reduction in the cost, and it is excellent in the practicability.

According to the present invention, the cord support device including the inclined drum configured to hang the annular upper end portion of the direction control cord can change or adjust the frictional resistance involved in the hanging with respect to various horizontal blinds.

Drawings

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

Fig. 2 (a) and (b) are a perspective view and a cross-sectional view, respectively, showing the schematic configuration of a rope support device having a delay unit according to one embodiment of the present invention.

Fig. 3 is an exploded perspective view showing an approximate configuration of a delay unit according to a first embodiment of the present invention.

Fig. 4 is a perspective view illustrating an assembling method of a rope support device having a delay unit according to one embodiment of the present invention.

Fig. 5 (a), (b), and (c) are diagrams illustrating operations related to the delay unit according to the first embodiment of the present invention.

Fig. 6 (a), (b), and (c) are schematic side views illustrating the operation of the horizontal blind relating to the delay unit according to the first embodiment of the present invention.

Fig. 7 (a) and (b) are a perspective view and a cross-sectional view, respectively, showing the schematic configuration of a rope support device having a delay unit according to a second embodiment of the present invention.

Fig. 8 is an exploded perspective view showing an approximate configuration of a delay unit according to a second embodiment of the present invention.

Fig. 9 is a perspective view illustrating an assembling method of a rope support device having a delay unit according to a second embodiment of the present invention.

Fig. 10 (a) and (b) are a perspective view and a cross-sectional view, respectively, showing the schematic configuration of another example of the string supporting device having the delay unit according to the second embodiment of the present invention.

Fig. 11 is a perspective view illustrating an assembling method of another example of the string supporting device having the delay unit according to the second embodiment of the present invention.

Fig. 12 is an exploded perspective view showing an approximate configuration of a delay unit according to a third embodiment of the present invention.

Fig. 13 is an exploded perspective view showing an approximate configuration of a delay unit according to a fourth embodiment of the present invention.

Fig. 14 (a) and (b) are diagrams for explaining operations related to the delay cell according to the third embodiment of the present invention, respectively, and (c) is a diagram for explaining operations related to the delay cell according to the fourth embodiment of the present invention.

Fig. 15 is a plan view showing an assembly structure of the delay unit according to the embodiment of the present invention into the upper beam.

Fig. 16 (a) and (b) are plan views illustrating an assembly method of the delay unit according to the embodiment of the present invention into the upper beam.

Fig. 17 (a), (b), and (c) are plan views illustrating an assembly method of a plurality of delay cells in accordance with an embodiment of the present invention into an upper beam.

Fig. 18 (a) and (b) are perspective views each showing an example of a connection structure between the delay unit and the obstacle detection stop device in the rope support device according to the embodiment of the present invention.

Fig. 19 is an exploded perspective view showing an approximate configuration of a delay unit according to a fifth embodiment of the present invention.

Fig. 20 is a perspective view illustrating an assembling method of a string support device having a modification of the delay unit according to the fifth embodiment of the present invention.

Fig. 21 is a perspective view showing a schematic configuration of a rope support device including a modification of the delay unit according to the fifth embodiment of the present invention.

Fig. 22 is a front view showing a schematic configuration of a horizontal blind according to an embodiment of the present invention, which includes a cord support device for suspending a direction control cord having a looped upper end portion.

Fig. 23 (a) and (b) are a partial front view and a side view, respectively, of the periphery of a rope support device for suspending a direction control rope having one looped upper end portion according to the related art.

Fig. 24 (a) is a partial side view of the periphery of a string support device according to an embodiment of the present invention, and (b) is a schematic view showing the string arrangement thereof.

Fig. 25 (a) is a partial side view of the periphery of a string support device according to a second embodiment of the present invention, and (b) is a schematic view showing the string arrangement thereof.

Fig. 26 (a) is a partial side view of the periphery of a string support device according to a third embodiment of the present invention, and (b) is a schematic view showing the string arrangement thereof.

Fig. 27 (a) is a partial side view of the periphery of a string support device according to a fourth embodiment of the present invention, and (b) is a schematic view showing the string arrangement thereof.

(symbol description)

1 … Upper Beam 4 … blade

5. 5L, 5M, 5R … rope support 5a … delay unit

5b … rope support Unit 6 … Direction control rope support Member

8 … underbeam 9 … direction control rope

10 … lifting rope 11 … driving shaft

12 … leaf presser 13, 13a, 13b … locking part

50 … supporting the housing 51, 51a … tilting roller

52 … winding shaft 53 … obstacle detection stopping device

55a, 55b … housing member 56 … output shaft member

57 … brake spring 58 … spring housing

59 … rotating transfer plate 60 … input shaft member

70 … support aid

Detailed Description

Hereinafter, a horizontal blind in which a blade raising and lowering operation by a raising and lowering cord and a blade tilting operation by a direction control cord are performed by rotation of one drive shaft will be described as an example with reference to the drawings. In the present specification, with respect to the front view of the horizontal blind shown in fig. 1, the upper side and the lower side in the drawing are defined as the upper side (or upper side) and the lower side (or lower side), respectively, and the left side in the drawing is defined as the left side of the horizontal blind and the right side in the drawing is defined as the right side of the horizontal blind, respectively, with respect to the suspension direction of the blades. Note that the observation side in the front view of fig. 1 is referred to as the front side (indoor side) and the opposite side is referred to as the rear side (or outdoor side), and when the front-rear direction of the horizontal louver is referred to, this means the direction perpendicular to the plane of the front view of fig. 1.

(construction of horizontal Venetian blind)

Fig. 1 is a front view showing a schematic configuration of a horizontal blind according to an embodiment of the present invention. In the horizontal blind shown in fig. 1, a cord support device 5 configured by arranging a delay unit 5a and a cord support unit 5b according to the present invention in parallel is provided in an upper member 1, and a direction control cord support member 6 is provided on a right end side in the upper member 1. In the illustrated example, only one of the string supporting device 5 and the direction control string supporting member 6 is illustrated, but two or more string supporting devices 5 and direction control string supporting members 6 may be provided in the upper beam 1.

The rope support unit 5b and the direction control rope support member 6 support the multi-layer blade 4 in a suspended manner via a pair of string-shaped direction control ropes 9 hanging from the indoor side and the outdoor side, respectively, and a lower beam 8 is supported in a suspended manner at the lower ends of the direction control ropes 9. The upper beam 1 is fixed to a ceiling-side mounting surface via a bracket 7.

Further, a thin rope-shaped lift cord 10 is suspended from the cord support unit 5b via a substantially central portion in the front-rear direction of the bottom surface of the upper beam 1, and the lower end of the lift cord 10 is fixed to the lower beam 8 after passing through an insertion hole (not shown) provided at a substantially central portion in the front-rear direction of each blade 4.

Therefore, the rope support unit 5b is configured such that the tilt roller 51 and the winding shaft 52 are arranged side by side on the drive shaft 11 in the shape of a quadrangular bar and supported by the support case 50, wherein the tilt roller 51 has a V-shaped groove for hanging the pair of direction control ropes 9 hanging from the indoor side and the outdoor side, respectively, and the winding shaft 52 is formed in an inclined long tube shape capable of winding or unwinding the lifting rope 10.

In this example, an obstacle detection stopping device 53 is provided on the leading end side of the winding shaft 52. The obstacle detection stopping device 53 is a device for preventing the rotation of the winding shaft 52 that supports the lift cord 10 when tension in the drawing direction is not applied to the lift cord 10, and has functions of: when the lower beam 8 hits an obstacle during the lowering of the blade 4, the unwinding of the lift cord 10 is stopped to stop the lowering of the blade 4 and the lower beam 8, and the reverse winding of the lift cord 10 is prevented.

In particular, in the string supporting device 5 having the delay unit 5a of the first embodiment, the string supporting unit 5b is configured to: the tilt drum 51 is connected to the drive shaft 11 so as to be non-rotatable with respect to the drive shaft 11, the windup shaft 52 is not connected to (not engaged with) the drive shaft 11, and the tilt drum 51 and the windup shaft 52 are supported by the support case 50; the delay unit 5a and the rope support unit 5b are provided in parallel on the drive shaft 11, and the delay unit 5a operates so that the windup shaft 52 rotates in conjunction with the rotation of the inclined drum 51 by a predetermined delay amount. Details will be described later.

The direction control cord support member 6 is a device for supporting only the inclined roller 51a having the V-shaped groove in which the pair of direction control cords 9 hanging from the indoor side and the outdoor side are respectively hung.

An operation unit 2 is provided on the right end side in the upper beam 1. In the illustrated manual operation, the operation unit 2 includes a pulley (not shown) capable of hooking the operation rope 3 in the form of an endless rope (or an endless ball chain), and is capable of rotating the operation shaft 11 by pulling the operation rope 3 outward from the inside of the upper beam 1.

Alternatively, when the operation unit 2 is of an electric type, a motor capable of rotationally operating the drive shaft 11 in response to an operation signal from the outside may be used. Therefore, the form of the operation unit 2 may be any form as long as it can transmit the rotation of the drive shaft 11 according to the operation of the operator.

Therefore, in the horizontal blind shown in fig. 1, the tilt operation for adjusting the angle of the louver 4 can be performed by rotating the drive shaft 11 by operating the operation cord 3 and rotating the tilt drum 51 in the cord support device 5 and the tilt drum 51a in the direction control cord support member 6 in accordance with the rotation of the drive shaft 11. When the drive shaft 11 is rotated more than the number of rotations necessary for the tilting operation, the delay unit 5a causes the winding shaft 52 of the rope support device 5 to rotate in conjunction with the tilting roller 51 after a predetermined delay from the start of the rotation of the tilting roller 51 during the tilting operation, thereby enabling the raising and lowering operation of the blade 4.

The structure and operation of the delay unit 5a and the rope support device 5 of each embodiment will be described in more detail below.

(embodiment one)

Fig. 2 (a) and (b) are a perspective view and a cross-sectional view, respectively, showing the schematic configuration of the rope support device 5 having the delay unit 5a according to the first embodiment of the present invention. Fig. 3 is an exploded perspective view showing a schematic configuration of the delay unit 5a according to the first embodiment of the present invention. Fig. 4 is a perspective view illustrating an assembling method of the rope support device 5 including the delay unit 5a according to the first embodiment of the present invention.

The string support device 5 shown in fig. 2 (a) is configured by arranging a delay unit 5a and a string support unit 5b in parallel. In the rope support unit 5b, the tilt drum 51 and the take-up shaft 52 are supported by the support case 50 so as to be rotatable about the drive shaft 11 as a rotation axis. The direction control cord 9 (see fig. 1) hanging down from the tilt roller 51 and the lift cord 10 (see fig. 1) hanging down from the take-up shaft 52 are drawn out from the outlet port 50a provided on the bottom surface of the support case 50.

As shown in fig. 2 (b), the inclined roller 51 is connected to the drive shaft 11 so as to be unrotatable with respect to the drive shaft 11, and is supported by the support housing 50. The windup shaft 52 is supported by the support case 50 in a state of being not connected to (not engaged with) the drive shaft 11. Further, an obstacle detection stopping device 53 is provided on the leading end side of the winding shaft 52, and the obstacle detection stopping device 53 is configured to stop the rotation of the winding shaft 52 that supports the lift cord 10 when tension in the drawing direction is not applied to the lift cord 10, and the obstacle detection stopping device 53 is also supported by the support case 50 in a state of being disconnected from (not engaged with) the drive shaft 11. Although the housing main body of the obstacle detection stopping device 53 is fixed to the front end side of the windup shaft 52, the cylindrical cam shaft 531 housed in the housing main body of the obstacle detection stopping device 53 has a necessary play (an idle gap, that is, a rotation amount that prevents the windup shaft 52 from rotating) to stop unwinding of the lift cord 10 and stop the lowering of the vane 4 and the underbeam 8 when the underbeam 8 hits an obstacle during the lowering of the vane 4, and then can rotate integrally with the rotation of the windup shaft 52.

As shown in fig. 3, the delay unit 5a provided in parallel with the rope support unit 5b is composed of an output shaft member 56, a brake spring 57, a spring housing 58, a rotation relay plate 59, an input shaft member 60, and housing members 55a, 55 b.

The output shaft member 56 has a cylindrical shaft portion 561 having a hexagonal shape on the outer side and a substantially cylindrical shaft 562, wherein the cylindrical shaft 562 protrudes to the distal end side (drive transmission input side) of the shaft portion 561 via a flange 567 on which a cylindrical shaft portion 568 is formed, and a protrusion portion 564 protruding toward the drive transmission input side within a range of a predetermined angle (an angle α 1 described later) with respect to the shaft center of the cylindrical shaft 562 is provided on a partial outer periphery of the cylindrical shaft 562. The shaft portion 568 and the flange 567 of the output shaft member 56 are relatively rotatably supported by a circular opening portion 559c and an opening side surface 559a on one side surface (drive transmission output side) of the housing members 55a and 55b, respectively. In this example, cylindrical shaft 562 and protrusion 564 are formed to protrude in a continuous shape, but cylindrical shaft 562 and protrusion 564 may protrude separately and independently. A recessed region of the outer periphery of the cylindrical shaft 562 other than the projection 564 is formed as an engagement receiver 563, and the engagement receiver 563 is a movable region of a projection piece 592 of a rotation relay plate 59 to be described later. Further, a shaft hole 565 through which the drive shaft 11 can be inserted in a non-engaged state is formed in the shaft portion 561 and the cylindrical shaft 562. Further, the cylindrical shaft portion 561 having a hexagonal outer shape is engaged with the cylindrical cam shaft 531 having the hexagonal shaft hole 531a of the obstacle detection stop device 53 so as to be rotatable integrally (see fig. 4), and the rotation of the output shaft member 56 can be transmitted by the synchronous rotation of the shaft portion 561 and the cam shaft 531 of the obstacle detection stop device 53 (see fig. 2 (b)).

The brake spring 57 and the spring housing 58 function as a brake member that suppresses rotation of the output shaft member 56 other than the rotation transmitted by the input shaft member 60. More specifically, the brake spring 57 and the spring housing 58 apply a predetermined braking force to the rotation transmitted from the camshaft 531 of the obstacle detection stop device 53 to the output shaft member 56. That is, the brake member constituted by the brake spring 57 and the spring housing 58 functions as a brake device for locking the rotation of the drive shaft 11 to prevent the blade 4 and the lower beam 8 from descending due to their own weight.

In order to keep the windup shaft 52 in a stable state of being free from rattling except during the up-down operation and to maintain the up-down position of the vanes 4, the pair of end portions 571 of the coil-shaped brake spring 57 are respectively engaged and fitted on both sides of the projection 564 of the output shaft member 56. Further, since the coil-shaped brake spring 57 is accommodated in the spring case 58 in a diameter-reduced state, the brake spring 57 constantly presses the inner peripheral surface of the spring case 58, and thus the brake spring 57 can rotate relative to the spring case 58, but generates a predetermined braking force. Further, since the pair of concave portions 582 provided in a part of the spring case 58 are locked so as to be unrotatable by the convex portions 557 provided in the case members 55a and 55b, respectively, and are fitted in the receiving portions 556 of the case members 55a and 55b, respectively, the spring case 58 is fixed so as to be unrotatable.

The rotating transfer plate 59 is formed of a substantially cylindrical member having an outer diameter substantially equal to the diameter of the brake spring 57 accommodated in the spring housing 58 in a reduced diameter state, and is formed with a shaft hole 591 having a diameter substantially equal to the diameter of the shaft hole 565 of the output shaft member 56. Therefore, the shaft hole 591 can be inserted with the drive shaft 11 in a non-engaged state. The rotating relay plate 59 is formed of a substantially cylindrical member, and more specifically, a protrusion piece 592 protruding within a range of a predetermined angle (angle α 2 described later) with respect to the axial center thereof is provided at a position on the distal end surface of the rotating relay plate 59 near the outer peripheral edge. In a state where the distal end surface of the rotation relay plate 59 is disposed so as to pass through the inside of the brake spring 57 and come into contact with the distal end surface of the output shaft member 56 (see fig. 2 b), the rotation relay plate 59 is relatively rotatably housed in the housing portions 555 of the case members 55a and 55b, respectively. Therefore, the projection piece 592 on the distal end surface side of the rotating relay plate 59 can be relatively rotated within the range of the engagement receiver 563, which is the recessed region other than the projection portion 564 of the output shaft member 56, so long as the projection piece 592 is in contact with the projection portion 564 of the output shaft member 56 via the end portion 571 of the brake spring 57, even if the rotating relay plate 59 is rotated, the rotation of the rotating relay plate 59 is not transmitted to the output shaft member 56 until the projection piece 592 is in contact with the projection portion 564 of the output shaft member 56, but the rotation of the rotating relay plate 59 is transmitted to the output shaft member 56 after the projection piece 592 is in contact with the projection portion 564 of the output shaft member 56.

Further, a groove-shaped engagement receiving portion 593 is formed on the distal end surface of the rotation transfer plate 59 around the shaft hole 591 in addition to a part of the rotation receiving portion 594. Rotation receiver 594 is formed within a range of a predetermined angle (angle α 3 described later) with respect to the axial center of axial hole 591. In this example, the groove-shaped engagement receiving portion 593 is formed to form the rotation receiving portion 594, but may not be provided as long as the same function can be achieved.

In the input shaft member 60, a shaft portion 601 and a projection piece 603 are formed via a flange 604, wherein the shaft portion 601 has a cylindrical shape and a substantially rectangular hole-shaped shaft hole 602 directly connected to the drive shaft 11, the projection piece 603 projects in parallel with the shaft portion 601 within a range of a predetermined angle (an angle α 4 described later) with respect to an axial center of the shaft portion 601, and a cylindrical shaft portion 606 is formed on the flange 604. In a state where the drive transmission output side surface of the flange 604 of the input shaft member 60 is disposed in abutment with the drive transmission input side surface of the rotating transfer plate 59 (see fig. 2 b), the shaft portion 606 and the flange 604 of the input shaft member 60 are relatively rotatably supported in the circular opening portion 559d and the housing portion 555 of the drive transmission input side end portions of the case members 55a, 55b, respectively. The shaft portion 601 can be supported by the shaft hole 565 of the output shaft member 56 and the shaft hole 591 of the rotating relay plate 59.

Therefore, the projection pieces 603 of the input shaft member 60 can be relatively rotated within the range of the engagement receiving portion 593 of the rotation transfer plate 59, that is, even if the input shaft member 60 directly connected to the drive shaft 11 is rotated, the rotation of the input shaft member 60 is not transmitted to the rotation transfer plate 59 until the projection pieces 603 come into contact with the rotation receiving portion 594 of the rotation transfer plate 59, but the rotation of the input shaft member 60 is transmitted to the rotation transfer plate 59 after the projection pieces 603 come into contact with the rotation receiving portion 594 of the rotation transfer plate 59.

Therefore, the delay unit 5a of the first embodiment generates the amount of delay of the sum of the amount of delay between the input shaft member 60 and the rotating relay plate 59 and the amount of delay between the rotating relay plate 59 and the output shaft member 56 before the rotation of the input shaft member 60 is transmitted to the output shaft member 56.

For example, as shown in fig. 5 (a), the retardation amount between the rotary relay plate 59 and the output shaft member 56 is the retardation amount β between the projection 564 projecting within the range of the angle α 1 and the projection piece 592 projecting within the range of the angle α 2. For example, if α 1 ≈ 60 degrees and α 2 ≈ 90 degrees, the retardation amount β ≈ 210 degrees. As shown in fig. 5 (b), the delay amount between the input shaft member 60 and the rotation neutral plate 59 is the delay amount γ between the rotation receiver 594 within the range of the angle α 3 and the projection piece 603 projecting within the range of the angle α 4. For example, if α 3 ≈ 60 degrees and α 4 ≈ 60 degrees, the retardation amount γ ≈ 240 degrees. The delay amount until the rotation of the input shaft member 60 is transmitted to the output shaft member 56 is β + γ ≈ 450 degrees. Therefore, by setting the amount of rotation for causing the retard by the retard unit 5a to be equal to or larger than the angular adjustment range of the vane 4, various retard amounts can be realized, and the rotation relay plate 59 functions as a retard adjustment member that relays the rotation by a predetermined retard amount.

Further, of the constituent members of the delay unit 5a according to the first embodiment, only the input shaft member 60 is provided as a member directly connected to the drive shaft 11 and rotated, and only by arranging the delay unit 5a according to the first embodiment on the drive shaft 11, the windup shaft 52 can be rotated in conjunction with the tilt drum 51 after a predetermined delay amount has passed from the start of rotation of the tilt drum 51 through the obstacle detection stop device 53 (see fig. 4 and fig. 2 (b)).

In particular, as shown in fig. 4, the housing members 55a, 55b of the delay unit 5a of the first embodiment are each formed with a claw portion 558 on the side wall portion on the drive transmission output side, and the claw portion 558 grips the protrusion portion 50b provided on the support housing 50 of the rope support unit 5 b. This enables the delay unit 5a according to the first embodiment to be stably assembled to the drive shaft 11 in a form that can be easily attached and detached to and from the string supporting unit 5 b. Further, the shaft portion 561 of the output shaft member 56 of the delay unit 5a is engaged with the shaft hole 531a of the cam shaft 531 of the obstacle detection stop device 53, whereby the delay unit 5a and the obstacle detection stop device 53 are connected so as to be rotatable integrally, but when an excessive load is applied to the rotation of the drive shaft 11 despite the operation of the obstacle detection stop device 53, an undesirable urging force that separates the obstacle detection stop device 53 from the support case 50 is generated, and the undesirable urging force acts in a direction that separates the connected state, and therefore there is a possibility of causing a failure. Therefore, as shown in fig. 4, it is preferable to provide a suppression wall 50j for suppressing the upward movement of the camshaft 531 on the support housing 50 so as to alleviate the above-described undesired force generated at the time of excessive load to separate the connected state.

Further, it is possible to omit the rotation of the intermediate rotating plate 59 and directly connect the input shaft member 60 and the output shaft member 56, thereby generating a delay amount between the input shaft member 60 and the output shaft member 56, and to generate different delay amounts by sharing the same output shaft member 56, brake spring 57, spring housing 58, and input shaft member 60, and the above-described case will be described as a second embodiment.

For example, as shown in fig. 5 (c), the delay amount between the input shaft member 60 and the output shaft member 56 when the rotation neutral plate 59 is not used is the delay amount η between the projection 564 projecting within the range of the angle α 1 and the projection piece 603 projecting within the range of the angle α 4. For example, if α 1 ≈ 60 degrees and α 4 ≈ 60 degrees, the retardation amount η ≈ 240 degrees. Therefore, by setting the amount of rotation for which the retard is generated by the retard unit 5a to be equal to or larger than the angle adjustment range of the blade 4, various retard amounts can be realized.

Further, by providing the rotation relay plate 59 in which the shape of the projection piece 592 (angle α 2) or the shape of the rotation receiver 594 (angle α 3) is changed to generate a plurality of retardation amounts, it is possible to realize a plurality of retardation amounts by merely changing the rotation relay plate 59.

The housing members 55a, 55b are formed to fit into each other in a direction perpendicular to the drive shaft 11 (in this example, the front-rear direction), and house the output shaft member 56, the brake spring 57, the spring housing 58, the rotation relay plate 59, and the input shaft member 60. More specifically, fitting receiving portions 551 each having a protrusion 553 are formed on the top and bottom surfaces of the case member 55a, respectively, and fitting pieces 552 each having a hole 554 that can be fitted into the protrusion 553 are formed on the top and bottom surfaces of the case member 55b, respectively, and the fitting pieces 552 are engaged with the fitting receiving portions 551. That is, when the two housing members are fitted to form one housing, if the housing is fitted in the direction parallel to the drive shaft 11, the fitting force of the drive shaft 11 is weakened by the rotation thereof, which may cause a quality problem, and therefore, it is necessary to form the housing as a whole with screws or the like.

In the present embodiment, the example in which the shaft portion 561 of the output shaft member 56 and the cam shaft 531 of the obstacle detection stop device 53 are engaged in a hexagonal shape has been described, but from the viewpoint of improving the assembling property, it is preferable to form the engagement shape having more sides. That is, the shaft portion 561 of the output shaft member 56 is formed in a polygonal shape, and the cam shaft 531 of the obstacle detection stop device 53 is formed so as to be engageable with the shaft portion 561 of the output shaft member 56, whereby the assembly can be performed by a slight rotational operation, and the assembly performance is improved.

In addition, in the case of the horizontal blind shown in fig. 1 to which the cord support device 5 including the delay unit 5a according to the first embodiment is applied, the rotation operation of the tilt drum 51 and the wind-up shaft 52 can be performed by one drive shaft 11, and when the tilt operation that does not cause the up-and-down movement of the vanes 4 is desired, the lower beam 8 is not moved up or down by the tilt operation. In addition, even when the lower beam 8 is at a position other than the lowest position, operability is not impaired by the blade 4 being tilted after the folded portion thereof is raised.

For example, in the case where the blades 4 in the horizontal state are stacked in a predetermined number on the lower beam 8 in the stationary state shown in fig. 6 (a), the lower beam 8 does not rise or fall even if the angle of the blades 4 is adjusted by the tilting operation as shown in fig. 6 (b). As shown in fig. 6 (c), when the tilting operation is performed, there is no possibility that the operability is impaired, such as the folded portion of the blade 4 is raised and then tilted.

Further, as shown in fig. 3, the case members 55a and 55b are formed with upper corners 550a recessed in a quadrangular shape. Therefore, when the delay unit 5a is installed in the upper beam 1, the upper corners 550a of the delay unit 5a supported by the lower corners 550b are engaged with the upper end of the upper beam 1 (see fig. 6), and the delay unit 5a can be prevented from rattling in the front-rear direction and the up-down direction. Further, since the housing members 55a and 55b of the delay unit 5a are formed with the claw portions 558, the claw portions 558 grip the protrusion portions 50b on the support housing 50 of the string support unit 5b, and thereby the play of the delay unit 5a in the left-right direction can also be suppressed.

In the present embodiment, the description has been given of the example in which the shaft portion 561 of the output shaft member 56 is engaged with the cam shaft 531 of the obstacle detection stop device 53, but the operation and effect according to the present invention can also be exhibited in the case where the shaft portion 561 of the output shaft member 56 is directly engaged with the windup shaft 52 without passing through the obstacle detection stop device 53.

(second embodiment)

Next, the rope support device 5 having the delay unit 5a of the second embodiment will be described. Fig. 7 (a) and (b) are a perspective view and a cross-sectional view, respectively, showing the schematic configuration of the rope support device 5 having the delay unit 5a according to the second embodiment of the present invention. Fig. 8 is an exploded perspective view showing a schematic configuration of a delay unit 5a according to a second embodiment of the present invention. Fig. 9 is a perspective view illustrating an assembling method of the rope support device 5 including the delay unit 5a according to the second embodiment of the present invention. In addition, in the second embodiment, the same reference numerals are given to the structural elements having the same functions as those of the first embodiment.

The string supporting device 5 having the delay unit 5a of the second embodiment shown in fig. 7 (a) is configured by arranging the delay unit 5a and the string supporting unit 5b in parallel, as in the first embodiment. In addition, the rope support unit 5b related to the delay unit 5a of the second embodiment is configured to rotatably support the tilt drum 51 and the windup shaft 52 by the support case 50 with the drive shaft 11 as the rotation axis, as in the first embodiment. The direction control cord 9 hanging down from the tilt roller 51 and the lift cord 10 hanging down from the take-up shaft 52 are led out from the outlet port 50a provided on the bottom surface of the support case 50.

However, the winding shaft 52 of the rope support unit 5b associated with the delay unit 5a of the second embodiment can wind the strip-shaped lift rope 10 in a multi-layer winding manner or unwind the strip-shaped lift rope 10, and the tilt roller 51 suspends and supports the direction control rope 9 by attaching the suspending member 511 formed of a torsion coil spring. Such a configuration of the cord support unit 5b is suitable for a horizontal blind window requiring miniaturization.

The suspension member 511 is formed of a torsion coil spring, and both ends of the torsion coil spring are bent to form a direction control cord fixing portion 511a and a locking end portion 511b in a ring shape. The upper ends of the pair of front and rear direction control cords 9 are fixed to the direction control cord fixing portions 511a and suspended and supported. The suspension member 511 is tightly wound around and fixed to the inclined drum 51, and the suspension member 511 and the inclined drum 51 rotate integrally until the locking end 511b abuts against a wall portion formed on the support housing 50, and when the locking end 511b abuts against the wall portion formed on the support housing 50, the fastening force thereof becomes weak and the inclined drum 51 rotates idly. Therefore, the angle of each blade 4 can be adjusted in phase via the direction control cord 9 according to the rotation of the tilting roller 51.

The delay unit 5a of the first embodiment shown in fig. 3 can be used as the string supporting unit 5b associated with the delay unit 5a of the second embodiment, but the delay unit 5a of the second embodiment is configured as shown in fig. 8 in order to achieve the object of downsizing.

Referring to fig. 8, in the delay unit 5a of the second embodiment, the rotary relay plate 59 is omitted, the shapes of the housing members 55a and 55b are made smaller, and the other output shaft member 56, the brake spring 57, the spring housing 58, and the input shaft member 60 are used in common with the first embodiment, as compared with the first embodiment.

Further, regarding the shape of the housing members 55a, 55b, the formation of the housing portion 555 for housing the rotation relay plate 59 is omitted as compared with the first embodiment, and the shaft portion 606 and the flange 604 of the input shaft member 60 are relatively rotatably supported by the circular opening portion 559d and the opening side surface 559b on the drive transmission input side end portions of the housing members 55a, 55b, respectively, thereby contributing to downsizing.

That is, the delay unit 5a of the second embodiment is configured to: the rotation relay plate 59 is omitted, and the input shaft member 60 and the output shaft member 56 are directly connected to each other, so that the delay amount between the input shaft member 60 and the output shaft member 56 is generated, and the output shaft member 56, the brake spring 57, the spring housing 58, and the input shaft member 60 are common to the embodiment, but different delay amounts can be generated.

For example, as described above with reference to fig. 5 (c), the delay amount between the input shaft member 60 and the output shaft member 56 when the neutral plate 59 is not rotated is the delay amount η between the projection 564 projecting within the range of the angle α 1 and the projection piece 603 projecting within the range of the angle α 4. For example, if α 1 ≈ 60 degrees and α 4 ≈ 60 degrees, the retardation amount η ≈ 240 degrees. Therefore, by setting the amount of rotation for which the retard is generated by the retard unit 5a to be equal to or larger than the angle adjustment range of the blade 4, various retard amounts can be realized.

In the second embodiment, as shown in fig. 7 (b), the inclined roller 51 is also connected to the drive shaft 11 so as to be unrotatable with respect to the drive shaft 11, and is supported by the support housing 50. The windup shaft 52 is supported by the support case 50 in a state of being not connected to (not engaged with) the drive shaft 11. Further, an obstacle detection stopping device 53 is provided on the leading end side of the winding shaft 52, and the obstacle detection stopping device 53 is configured to stop the rotation of the winding shaft 52 that supports the lift cord 10 when tension in the drawing direction is not applied to the lift cord 10, and the obstacle detection stopping device 53 is also supported by the support case 50 in a state of being disconnected from (not engaged with) the drive shaft 11. Although the housing main body of the obstacle detection stopping device 53 is fixed to the front end side of the winding shaft 52, the cylindrical cam shaft 531 housed in the housing main body of the obstacle detection stopping device 53 has a play (backlash) necessary to stop the lowering of the vane 4 and the underbeam 8 by stopping the unwinding of the lifter rope 10 when the underbeam 8 hits an obstacle during the lowering of the vane 4 and to prevent the reverse winding of the lifter rope 10, and thereafter can rotate integrally with the rotation of the winding shaft 52.

Further, in the delay unit 5a of the second embodiment, only the input shaft member 60 is provided as a member directly connected to the drive shaft 11 and rotated, and only by arranging the delay unit 5a of the second embodiment on the drive shaft 11, the winding shaft 52 can be rotated in conjunction with the tilting roller 51 after a predetermined delay amount has passed from the start of rotation of the tilting roller 51 through the obstacle detection stop device 53 (see fig. 9 and fig. 7 (b)).

In particular, as shown in fig. 9, the housing members 55a, 55b of the delay unit 5a of the second embodiment are each formed with a claw portion 558 on the side wall portion on the drive transmission output side, and the claw portion 558 grips the protrusion portion 50b provided on the support housing 50 of the rope support unit 5 b. This enables the delay unit 5a of the second embodiment to be stably assembled to the drive shaft 11 in a form that can be easily attached to and detached from the string supporting unit 5 b.

In the second embodiment, the housing members 55a and 55b are also configured to be fitted in the direction perpendicular to the drive shaft 11, and have a fitting force capable of receiving the rotation of the drive shaft 11, so that it is not necessary to form the housing members as a whole with screws or the like, which contributes to the simplification of assembly and the reduction of cost.

Further, as shown in fig. 8, in the second embodiment, upper corners 550a recessed in a quadrangular shape are also formed in the case members 55a and 55 b. Therefore, when the delay unit 5a is installed in the upper beam 1, the upper corners 550a of the delay unit 5a supported by the lower corners 550b are engaged with the upper end of the upper beam 1 (similar to fig. 6), and the delay unit 5a can be prevented from rattling in the front-rear direction and the vertical direction. Further, since the housing members 55a and 55b of the delay unit 5a are formed with the claw portions 558, the claw portions 558 grip the protrusion portions 50b on the support housing 50 of the string support unit 5b, and thereby the play of the delay unit 5a in the left-right direction can also be suppressed.

In the present embodiment, the shaft portion 561 of the output shaft member 56 is formed in a polygonal shape, and the cam shaft 531 of the obstacle detection stop device 53 is formed so as to be engageable with the shaft portion 561 of the output shaft member 56, whereby the assembly can be performed by a small number of rotational operations, and the assembly performance is improved.

In addition, in the case of the horizontal blind to which the cord support device 5 including the delay unit 5a according to the second embodiment is applied, even if the configuration is such that the rotation operation of the tilt drum 51 and the wind-up shaft 52 can be performed by one drive shaft 11, when the tilt operation that does not cause the up-and-down movement of the blade 4 is desired, the lower beam 8 is not moved up or down by the tilt operation. In addition, when the lower beam 8 is at a position other than the lowest position, there is no possibility of impairing the operability such that the folded portion of the blade 4 is raised and then tilted in the tilting operation.

In the present embodiment, the description has been given of the example in which the shaft portion 561 of the output shaft member 56 is engaged with the cam shaft 531 of the obstacle detection stop device 53, but the operation and effect according to the present invention can also be exhibited in the case where the shaft portion 561 of the output shaft member 56 is directly engaged with the windup shaft 52 without passing through the obstacle detection stop device 53.

The delay unit 5a of the first and second embodiments can be applied to the rope support unit 5b configured to wind the lifting rope 10 in a string shape by the spiral winding type spiral shaft 52C, while keeping the shape and structure thereof unchanged, to configure the rope support device 5.

For example, (a) and (b) in fig. 10 are a perspective view and a cross-sectional view respectively showing a schematic configuration of a spirally wound rope support device 5 having a delay unit 5a according to a second embodiment of the present invention. Fig. 11 is a perspective view illustrating an assembling method of the spirally wound rope support device 5 having the delay unit 5a according to the second embodiment of the present invention. In addition, in fig. 10 and 11, the same reference numerals are given to structural elements having the same functions as those of the first embodiment.

The spirally wound rope support device 5 shown in fig. 10 (a) is configured by arranging the delay unit 5a and the rope support unit 5b in parallel, as described above. However, the screw shaft 52C in the string supporting unit 5b shown in fig. 10 (a) is configured to: the drive shaft 11 is inserted through the substantially cylindrical body of the screw shaft 52C in an unengaged (unconnected) state, and a helical screw convex strip is formed on the surface of the screw shaft 52C, and the upper end of the lift cord 10 is attached and fixed to the concave portion near the tip of the screw shaft 52C, whereby the lift cord 10 can be wound or unwound.

The helical screw thread protrusion on the screw shaft 52C is capable of being screwed with the helical screwed protrusion 50d provided on the inner peripheral surface of the support case 50, and the screw shaft 52C itself moves relative to the case 51C in the axial direction as the screw shaft 52C (winding shaft 52) rotates.

The housing 51C is formed with a tilt roller 51, and the tilt roller 51 suspends and supports the direction control cord 9 by attaching a suspension member 511 formed of a torsion coil spring.

The suspending member 511 is formed into a loop shape with a direction control cord fixing portion 511a and a locking end portion 511b by bending both ends of the torsion coil spring, and the suspending member 511 is tightly wound and fixed on the tilting roller 51. The suspension member 511 and the inclined drum 51 rotate integrally before the locking end 511b abuts against the wall portion formed on the support housing 50, and when the locking end 511b abuts against the wall portion formed on the support housing 50, the fastening force of the suspension member 511 becomes weak and the inclined drum 51 rotates idly. Therefore, the angle of each blade 4 can be adjusted in phase via the direction control cord 9 according to the rotation of the tilting roller 51.

In the example shown in fig. 10 (a), the tilt drum 51 and the take-up shaft 52 are also supported by the support housing 50 so as to be rotatable about the drive shaft 11 as a rotation axis. The direction control cord 9 hanging down from the tilt roller 51 and the lift cord 10 hanging down from the take-up shaft 52 are led out from the outlet port 50a provided on the bottom surface of the support case 50.

As shown in fig. 10 b, the housing 51C (inclined roller 51) is connected to the drive shaft 11 so as to be unrotatable with respect to the drive shaft 11, and is supported by the support housing 50. The windup shaft 52 is supported by the support case 50 in a state of being not connected to the drive shaft 11.

As shown in (a) and (b) of fig. 10, the delay unit 5a of the second embodiment is configured such that: the screw shaft 52C (winding shaft 52) is fixedly attached to the support auxiliary member 70 via a disk shape fixed to the tip end thereof.

In the delay unit 5a of the second embodiment, only the input shaft member 60 is provided as a member directly connected to the drive shaft 11 and rotated, and only by arranging the delay unit 5a of the second embodiment on the drive shaft 11, the screw shaft 52C (winding shaft 52) can be rotated in conjunction with the tilting drum 51 after a predetermined delay amount from the start of rotation of the tilting drum 51 (see fig. 11 and fig. 10 (b)).

In particular, as shown in fig. 11, the claw portions 558 of the housing members 55a and 55b of the delay unit 5a according to the second embodiment can grip the disc-shaped support auxiliary member 70 provided on the screw shaft 52C (winding shaft 52) of the string supporting unit 5 b. Thus, the delay unit 5a of the second embodiment can be stably assembled to the drive shaft 11 in a form that can be easily attached and detached to and from the spiral-type rope support unit 5b

[ other examples ]

In the delay unit 5a of the first and second embodiments, the following points are explained: the rope support device 5 is configured by arranging the delay units 5a outside the various support cases 50, so that the assembling property is improved, and the reduction in size and the generalization of the rope support device 5, the reduction in the burden of component management, and the reduction in cost are facilitated, and the practicability is excellent. In particular, in the delay units 5a of the first and second embodiments, the number of shared components is increased as much as possible, with importance placed on the reduction of the component management load and the reduction of the cost.

In this regard, in the case of the delay unit 5a according to the first or second embodiment, the increase in size can be avoided, and an effective operation and effect can be produced.

As can be seen from comparison between the first example of the delay unit 5a shown in fig. 3 and the second example of the delay unit 5a shown in fig. 8, the first example of the delay unit 5a shown in fig. 3 has a configuration in which the width of the case members 55a and 55b in the left-right direction is larger than the second example of the delay unit 5 a. Therefore, it is also assumed that it is desirable to further reduce the width in the left-right direction of the case members 55a, 55b of the delay unit 5a of the first embodiment when, for example, the space provided in the upper beam 1 is insufficient.

Therefore, as a configuration example in which the dimension of the delay unit 5a itself in the left-right direction is more emphasized than the reduction of the burden of component management and the cost reduction, the third and fourth embodiments will be described in order. In summary, the first and second embodiments are configured to associate the rotation transmission site that generates the predetermined retardation amount with the axial direction of the drive shaft 11, and the third and fourth embodiments are configured to associate the rotation transmission site that generates the predetermined retardation amount with the direction perpendicular to the drive shaft 11, thereby making the lateral width of the housing members 55a and 55b in the delay unit 5a of the third and fourth embodiments smaller.

(third embodiment)

Fig. 12 is an exploded perspective view showing an approximate configuration of a delay unit according to a third embodiment of the present invention. In addition, the same reference numerals are given to structural elements having the same functions as those of the first embodiment described above. As shown in fig. 12, the delay unit 5a of the present embodiment is constituted by an output shaft member 56, a brake spring 57, a spring housing 58, a rotation neutral plate 59, an input shaft member 60, and housing members 55a and 55b, as in the above-described embodiments.

The output shaft member 56 in this embodiment is provided with a cylindrical shaft portion 561 having an octagonal outer side, and a projecting portion 564, wherein the projecting portion 564 is provided on a distal end side (drive transmission input side) of the shaft portion 561 via a flange 567 in which a cylindrical shaft portion 568 is formed, and the projecting portion 564 projects toward the drive transmission input side in the vicinity of a partial outer periphery of the flange 567 within a range of a predetermined angle (angle α 1 described later) with respect to an axial center of the shaft portion 561. The shaft 568 and the flange 567 of the output shaft member 56 are relatively rotatably supported by a circular opening 559c and an opening side surface 559a on one side surface (drive transmission output side) of the housing members 55a and 55b, respectively. In the output shaft member 56 of the present embodiment, engagement receiver portions 563a and 563b recessed in a step shape are formed on the surface on the distal end side (drive transmission input side) of the flange 567. The shaft portion 561 is formed with a shaft hole 565 through which the drive shaft 11 can be inserted in a non-engaged state. Further, the cylindrical shaft portion 561 having an octagonal outer shape is engaged with the cylindrical cam shaft 531 having the octagonal shaft hole 531a of the obstacle detection stop device 53 so as to be rotatable integrally, and rotation of the output shaft member 56 can be transmitted by the shaft portion 561 rotating in synchronization with the cam shaft 531 of the obstacle detection stop device 53 (the same as (b) in fig. 2).

The diameters of the brake spring 57 and the spring case 58 are larger than those of the brake spring 57 and the spring case 58 in the first and second embodiments so that the rotation transfer plate 59 of the present embodiment described later is housed inside, but the brake spring 57 and the spring case function as a brake member that suppresses the rotation of the output shaft member 56 other than the rotation transmitted by the input shaft member 60, similarly to the first and second embodiments. That is, a predetermined braking force is generated for the rotation transmitted from the camshaft 531 of the obstacle detection stop device 53 to the output shaft member 56. In order to keep the windup shaft 52 in a stable state of being free from rattling except during the up-down operation and to maintain the up-down position of the vanes 4, the pair of end portions 571 of the coil-shaped brake spring 57 are respectively engaged and fitted on both sides of the projection 564 of the output shaft member 56. Further, the coil-shaped brake spring 57 is accommodated in the spring case 58 in a reduced diameter state, and the brake spring 57 constantly presses the inner peripheral surface of the spring case 58, so that the brake spring 57 can rotate relative to the spring case 58, but generates a predetermined braking force. Further, since the pair of concave portions 582 provided in a part of the spring case 58 are locked so as to be unrotatable by the convex portions 557 provided in the case members 55a and 55b, and are fitted and fixed in the housing portions 556 of the case members 55a and 55b, the spring case 58 is fixed so as to be unrotatable.

The rotating transfer plate 59 of this embodiment is different from the first embodiment. The rotating transfer plate 59 of the present embodiment is formed of a substantially cylindrical member, and has an outer diameter smaller than that of the brake spring 57 housed in the spring housing 58 in a reduced diameter state, and has a projection 592a on a part of an outer peripheral surface, a rotation receiving portion 594 on a part of an inner peripheral surface, and a shaft hole 591 having a diameter substantially equal to that of the shaft hole 565 of the output shaft member 56. Therefore, the shaft hole 591 can be inserted with the drive shaft 11 in a non-engaged state. The drive transmission output side surface of the rotating intermediate plate 59 has a shape that can pass through the inside of the brake spring 57 and come into contact with the engagement receiving portions 563a and 563b in the drive transmission input side surface of the output shaft member 56, and in the contact arrangement state, the rotating intermediate plate 59 is positioned inside the brake spring 57 housed in the spring housing 58 in a reduced diameter state and housed in the housing members 55a and 55b so as to be relatively rotatable. Therefore, the projection 592a of the rotating relay plate 59 can be relatively rotated as long as it is within the range of the engagement receiver 563b, which is the recessed region of the output shaft member 56 other than the projection 564, that is, even if the rotating relay plate 59 rotates, the rotation of the rotating relay plate 59 is not transmitted to the output shaft member 56 until the projection 592a abuts against the projection 564 of the output shaft member 56 via the end 571 of the brake spring 57, and the rotation of the rotating relay plate 59 is transmitted to the output shaft member 56 after the projection 592a abuts against the projection 564 of the output shaft member 56.

Further, a concave engagement receiving portion 593 is formed around the shaft hole 591 on the inner peripheral surface of the rotation transfer plate 59 in addition to a part of the rotation receiving portion 594. Rotation receiver 594 is formed within a range of a predetermined angle (angle α 3 described later) with respect to the axial center of axial hole 591. In this example, the rotation receiver 594 and the projection 592a are formed in the same rotation angle range, but the size and arrangement of the rotation receiver 594 and the projection 592a may be changed according to the application.

The input shaft member 60 has a shaft portion 601 and a projection piece 603 formed on a drive transmission output side surface of a flange 604 in which a cylindrical shaft portion 606 is formed, wherein the shaft portion 601 has a cylindrical shape and a substantially rectangular hole-shaped shaft hole 602 directly connected to the drive shaft 11, and the projection piece 603 projects in parallel with the shaft portion 601 within a range of a predetermined angle (angle α 4 described later) with respect to an axial center of the shaft portion 601. In a state where the drive transmission output side surface of the flange 604 of the input shaft member 60 is disposed so as to be capable of abutting against the distal end surface of the rotating relay plate 59, the shaft portion 606 and the flange 604 of the input shaft member 60 are relatively rotatably supported by the circular opening portion 559d and the opening side surface 559b of the drive transmission input side end portion of the housing portion 556 of the case members 55a, 55b, respectively. The shaft portion 601 can be supported by the shaft hole 565 of the output shaft member 56 and the shaft hole 591 of the rotating relay plate 59.

Therefore, the projection pieces 603 of the input shaft member 60 can be relatively rotated as long as they are within the range of the engagement receiving portions 593 of the rotation transfer plate 59, that is, even if the input shaft member 60 directly connected to the drive shaft 11 is rotated, the rotation of the input shaft member 60 is not transmitted to the rotation transfer plate 59 until the projection pieces 603 come into contact with the rotation receiving portions 594 of the rotation transfer plate 59, but the rotation of the input shaft member 60 is transmitted to the rotation transfer plate 59 after the projection pieces 603 come into contact with the rotation receiving portions 594 of the rotation transfer plate 59.

Therefore, the delay unit 5a of the third embodiment generates the amount of delay of the sum of the amount of delay between the input shaft member 60 and the rotating relay plate 59 and the amount of delay between the rotating relay plate 59 and the output shaft member 56 before the rotation of the input shaft member 60 is transmitted to the output shaft member 56.

For example, as shown in fig. 14 (a), the delay amount between the rotation relay plate 59 and the output shaft member 56 is the delay amount β between the projection 564 projecting within the range of the angle α 1 and the projection 592a projecting within the range of the angle α 2. As shown in fig. 14 (b), the delay amount between the input shaft member 60 and the rotation neutral plate 59 is the delay amount γ between the rotation receiver 594 at the angle α 3 and the projection piece 603 projecting at the angle α 4. The delay amount until the rotation of the input shaft member 60 is transmitted to the output shaft member 56 is β + γ. Therefore, the delay unit 5a of the present embodiment can achieve the same function as the delay unit 5a of the first embodiment, and the rotation relay plate 59 functions as a delay adjusting member that relays rotation by a predetermined delay amount.

In particular, the delay unit 5a of the present embodiment is configured to: since the rotation relay plate 59 is positioned inside the spring case 58 and housed in the case members 55a and 55b, the width in the front-rear direction and the vertical direction equivalent to the delay unit 5a of the first embodiment can be realized, and the width in the left-right direction can be reduced as compared with the delay unit 5a of the first embodiment.

Further, of the constituent members of the delay unit 5a of the third embodiment, only the input shaft member 60 is directly connected to the drive shaft 11 and rotates, and only by arranging the delay unit 5a of the third embodiment on the drive shaft 11, the windup shaft 52 can be rotated in conjunction with the tilt drum 51 after a predetermined delay amount has passed from the start of rotation of the tilt drum 51 through the obstacle detection stop device 53 (the same as in fig. 4 described above).

In the present embodiment, claw portions 558 that grip the protrusions 50b provided on the support case 50 of the string support unit 5b are formed on the side wall portions on the drive transmission output side of the case members 55a and 55b, respectively. This enables the delay unit 5a of the third embodiment to be stably assembled to the drive shaft 11 in a form that can be easily attached to and detached from the string supporting unit 5 b.

In addition, in the case of the horizontal blind to which the cord support device 5 having the delay unit 5a of the third embodiment is applied, when a tilting operation that does not cause the raising and lowering of the vanes 4 is desired, the lower beam 8 is not raised or lowered by the tilting operation. In addition, even when the lower beam 8 is at a position other than the lowest position, operability is not impaired by the folded portion of the blade 4 being lifted and then tilted (the same as in fig. 6).

Further, as shown in fig. 12, in the third embodiment, upper corners 550a recessed in a quadrangular shape are also formed in the case members 55a and 55 b. Therefore, when the delay unit 5a is installed in the upper beam 1, the upper corners 550a of the delay unit 5a supported by the lower corners 550b are engaged with the upper end of the upper beam 1 (similar to fig. 6), and the delay unit 5a can be prevented from rattling in the front-rear direction and the vertical direction. Further, since the housing members 55a and 55b of the delay unit 5a are formed with the claw portions 558, the claw portions 558 grip the protrusion portions 50b on the support housing 50 of the string support unit 5b, and thereby the play of the delay unit 5a in the left-right direction can also be suppressed.

(example four)

Next, the rope support device 5 having the delay unit 5a of the fourth embodiment will be described. Fig. 13 is an exploded perspective view showing an approximate configuration of a delay unit according to a fourth embodiment of the present invention. In addition, the same reference numerals are given to structural elements having the same functions as those of the third embodiment described above. As shown in fig. 13, the delay unit 5a of the present embodiment is constituted by an output shaft member 56, a brake spring 57, a spring housing 58, an input shaft member 60, and housing members 55a and 55b, as in the third embodiment.

Referring to fig. 13, the delay unit 5a of the fourth embodiment is used in combination with the output shaft member 56, the brake spring 57, and the spring case 58 of the third embodiment, except that the shape of the input shaft member 60 is changed by omitting the rotation relay plate 59 while keeping the shapes of the case members 55a and 55b smaller than those of the third embodiment.

The input shaft member 60 in the delay unit 5a according to the fourth embodiment is formed with a cylindrical shaft portion 601, a cylindrical intermediate shaft portion 605, and a projecting piece 603a via a flange 604, wherein the shaft portion 601 has a substantially rectangular hole-shaped shaft hole 602 directly connected to the drive shaft 11, the intermediate shaft portion 605 is connected to the distal end side of the shaft portion 601, has a rectangular hole-shaped shaft hole 602 having a larger diameter than the shaft portion 601, and projects in parallel with the intermediate shaft portion 605 within a range of a predetermined angle (angle α 5 described later) with respect to the axial centers of the shaft portion 601 and the intermediate shaft portion 605.

The shaft portion 601 can be supported in the shaft hole 565 of the output shaft member 56. In a state where the boundary surface of the intermediate rotating shaft portion 605 with the shaft portion 601 is disposed so as to be capable of passing through the inside of the brake spring 57 and coming into contact with the engagement receiver 563a on the distal end surface of the output shaft member 56, the shaft portion 606 and the flange 604 of the input shaft member 60 are relatively rotatably supported by the circular opening portion 559d and the opening side surface 559b of the drive transmission input side end portion of the housing portion 556 of the housing members 55a and 55b, respectively. At this time, the intermediate rotation shaft portion 605 is located inside the brake spring 57 which is accommodated in the spring housing 58 in a reduced diameter state, and is accommodated in the housing members 55a and 55b so as to be relatively rotatable.

Therefore, the projection 603a of the input shaft member 60 can be rotated relatively as long as it is within the range of the engagement receiver 563b on the distal end surface of the output shaft member 56, that is, even if the input shaft member 60 directly connected to the drive shaft 11 is rotated, the rotation of the input shaft member 60 is not transmitted to the output shaft member 56 until the projection 603a thereof comes into contact with the projection 564 of the output shaft member 56, but the rotation of the input shaft member 60 is transmitted to the output shaft member 56 after the projection 603a comes into contact with the projection 564 of the output shaft member 56.

Further, the shapes of the case members 55a and 55b are maintained in a form contributing to further downsizing, and the same operational effects as those of the embodiment can be produced.

For example, as shown in fig. 14 (c), the delay amount between the input shaft member 60 and the output shaft member 56 when the rotation neutral plate 59 is not used is the delay amount η between the projection 564 projecting within the range of the angle α 1 and the projection piece 603a projecting within the range of the angle α 5.

Further, similarly to the second embodiment (similar to fig. 7 (b)), the inclined roller 51 according to the fourth embodiment is also connected to the drive shaft 11 so as not to be rotatable with respect to the drive shaft 11, and is supported by the support housing 50. The windup shaft 52 is supported by the support case 50 in a state of being not connected to (not engaged with) the drive shaft 11. Further, an obstacle detection stopping device 53 is provided on the leading end side of the winding shaft 52, and the obstacle detection stopping device 53 is configured to stop the rotation of the winding shaft 52 that supports the lift cord 10 when tension in the drawing direction is not applied to the lift cord 10, and the obstacle detection stopping device 53 is also supported by the support case 50 in a state of being disconnected from (not engaged with) the drive shaft 11. Although the housing main body of the obstacle detection stopping device 53 is fixed to the front end side of the winding shaft 52, the cylindrical cam shaft 531 housed in the housing main body of the obstacle detection stopping device 53 has a clearance (backlash) necessary to stop the lowering of the vane 4 and the underbeam 8 by stopping the unwinding of the lifter rope 10 when the underbeam 8 hits an obstacle during the lowering of the vane 4 and to prevent the reverse winding of the lifter rope 10, and thereafter can rotate integrally with the rotation of the winding shaft 52.

Further, in the delay unit 5a of the fourth embodiment, only the input shaft member 60 is provided as a member directly connected to the drive shaft 11 and rotated, and only by arranging the delay unit 5a of the fourth embodiment on the drive shaft 11, the winding shaft 52 can be rotated in conjunction with the tilt roller 51 after a predetermined delay amount has passed from the start of rotation of the tilt roller 51 via the obstacle detection stop device 53 (the same as in fig. 9).

In the delay unit 5a according to the fourth embodiment, claw portions 558 that grip the protrusions 50b provided on the support case 50 of the string support unit 5b are formed on the side wall portions on the drive transmission output side of the case members 55a and 55b, respectively. This enables the delay unit 5a of the fourth embodiment to be stably assembled to the drive shaft 11 in a form that can be easily attached to and detached from the string supporting unit 5 b.

Further, similarly to the case of the first and second embodiments, the delay units 5a of the third and fourth embodiments can be applied to the rope supporting unit 5b configured to wind the lifting rope 10 in a string shape by the spiral winding type spiral shaft 52C, thereby configuring the rope supporting device 5 (see fig. 10 described above). In particular, as in fig. 11, the claw portions 558 of the housing members 55a and 55b of the delay unit 5a according to the fourth embodiment can grip the disc-shaped support auxiliary member 70 provided on the screw shaft 52C (winding shaft 52) of the string supporting unit 5 b. This enables the delay unit 5a of the fourth embodiment to be stably assembled to the drive shaft 11 in a form that can be easily attached and detached to and from the spiral-type rope support unit 5 b.

Further, as shown in fig. 13, in the fourth embodiment, upper corners 550a recessed in a quadrangular shape are also formed in the case members 55a and 55 b. Therefore, when the delay unit 5a is installed in the upper beam 1, the upper corners 550a of the delay unit 5a supported by the lower corners 550b are engaged with the upper end of the upper beam 1 (similar to fig. 6), and the delay unit 5a can be prevented from rattling in the front-rear direction and the vertical direction. Further, since the housing members 55a and 55b of the delay unit 5a are formed with the claw portions 558, the claw portions 558 grip the protrusion portions 50b on the support housing 50 of the string support unit 5b, and thereby the play of the delay unit 5a in the left-right direction can also be suppressed.

(construction relating to the assembly of the delay unit in the upper beam)

Fig. 15 is a plan view showing an assembly structure of the delay unit 5a according to the embodiment of the present invention into the upper beam 1. In particular, in fig. 15, the configuration relating to assembly in the upper beam 1 will be described with the delay unit 5a shown in fig. 13 as a representative example of the delay units 5a of the first to fourth embodiments, but it should be noted that the same applies to any of the first to fourth embodiments.

The top surface of the upper beam 1 is formed with an opening having a length of L1 in the front-rear direction, and has a storage space therein having a length of substantially L2 (> L1) in the front-rear direction. The rope support unit 5b including the inclined drum 51, the winding shaft 52, and the obstacle detection stop device 53 is housed in the support case 50, and is provided in the upper beam 1 so that the housing space having the length L2 is limited to be free from displacement in the front-rear direction and the vertical direction. Therefore, when the string support units 5b housed in the support case 50 are installed in the upper beam 1, the upper beam 1 is installed by opening the top surface thereof or by inserting the same from openings (not shown) at both ends in the left-right direction of the upper beam 1.

Further, as shown in fig. 15, the length d between the side surface on the drive transmission input side of the case members 55a, 55b of the delay unit 5a and the side surface on the drive transmission output side of the shaft portion 561 is smaller than the opening length L1 on the top surface of the upper beam 1 as viewed from above. Therefore, the delay unit 5a can be easily disposed at a desired position within the housing space of the upper beam 1. That is, when the delay unit 5a is installed in the upper beam 1, it is not necessary to open the top surface of the upper beam 1 and install it, or to insert it from openings (not shown) at both ends in the left-right direction of the upper beam 1.

Further, as shown in fig. 15, the delay element 5a has an outer shape formed in an arc S having a diameter D (≦ L2) with the center of gravity Op as a center when viewed from above. Therefore, after the delay unit 5a is disposed in the upper beam 1, the delay unit 5a can be made to face the string supporting unit 5b to be connected, that is, housed in the supporting case 50, by rotating the delay unit 5a about the center of gravity Op, for example.

More specifically, when the delay unit 5a is assembled into the upper beam 1, first, as shown in fig. 16 (a), the delay unit 5a is disposed in the housing space of the upper beam 1 at a position close to the connection target, that is, the string supporting unit 5b housed in the support case 50. Next, as shown in fig. 16 (b), the delay unit 5a is rotated in the housing space of the upper beam 1 so as to face the string supporting unit 5b housed in the support case 50 as the connection target.

As shown in the plan view of fig. 17 (a), a plurality of delay units 5a and a plurality of string support units 5b are arranged in the upper member 1 according to the specification of the horizontal blind. As shown in fig. 17 (a), the directions of the plurality of rope support units 5b are arranged according to the hanging position of the lift rope 10, and the direction of the delay unit 5a is arranged according to the direction of each rope support unit 5b to be connected. As shown in fig. 17 (a), the direction control cord support member 6 may be disposed at an appropriate position according to the specification of the horizontal blind.

Next, as shown in the plan view of fig. 17 b, the drive shaft 11 is simply inserted into the plurality of delay units 5a and the plurality of string supporting units 5b and the direction control string supporting member 6 disposed in the upper beam 1 from openings (not shown) at both ends in the left-right direction of the upper beam 1, and after the functional members such as the operation unit 2 are disposed, both ends in the left-right direction of the upper beam 1 are plugged with the side covers 1 c.

At this time, when the drive shaft 11 is inserted into the plurality of rope support units 5b in the assembly process according to the related art, it is necessary to insert the lift rope 10 while performing alignment (initial winding amount and mounting position of each winding shaft 52) with respect to the mounting position of the lift rope 10 on all the winding shafts 52. On the other hand, the delay unit 5a according to the first to fourth embodiments of the present invention can be freely combined with and separated from the plurality of string supporting units 5b, and can be easily inserted when the drive shaft 11 is inserted, so that the cost (burden) related to the assembly thereof can be reduced.

That is, in the assembly step according to the present invention, after the drive shaft 11 is inserted, the positioning (initial winding amount and mounting position of each winding shaft 52) of the mounting positions of the lift cord 10 on all the winding shafts 52 can be performed.

More specifically, after the drive shaft 11 is simply inserted as described above, as shown in the plan view of fig. 17 (c), the drive shaft 11 is simply rotated several times (about two times) by the operation cord 3 in order to initialize the state of each delay unit 5a in the installation of the plurality of delay units 5 a. That is, in order to initialize the state by aligning the positions of the projections and the projections (for example, the projection 603 of the input shaft member 60, the projection 592a of the rotation transfer plate 59, the rotation receiver 594, and the projection 564 of the output shaft member 56 in the example shown in fig. 12) in each delay unit 5a, the drive shaft 11 is simply rotated several turns (about two turns) by the operation cord 3.

Next, as shown in the plan view of fig. 17 d, after the fixing positions (shown by S) of the lifting rope 10 on the winding shaft 52, which can be idly rotated with respect to the drive shaft 11, of the rope support units 5b are matched, the respective delay units 5a are connected to the rope support units 5b, which are the respective connection objects facing thereto, by the sliding operation in the left-right direction. In the delay unit 5a according to each of the first to fourth embodiments, since the housing members 55a and 55b having the lower corner portions 550b are formed with the upper corner portions 550a recessed in a quadrangular shape, the upper corner portions 550a engage with the upper end of the upper beam 1, and the delay unit 5a can be prevented from being slid by being shaken in the front-rear direction and the up-down direction. In this way, the state of each delay unit 5a can be easily initialized, and the positions of the winding shafts 52 in the respective rope support units 5b can be matched, so that the lifting operation of the blade 4 can be realized with good balance in the left-right direction.

Further, since the housing members 55a and 55b of the delay unit 5a are formed with the claw portions 558, the claw portions 558 grip the protrusion portions 50b on the support housing 50 of the string support unit 5b, and thereby the play of the delay unit 5a in the left-right direction can also be suppressed. In particular, since the claw portion 558 of the delay unit 5a is formed at a position (a position having a length within the range of the length L1 shown in (b) of fig. 16) where a state where it grips the protrusion portion 50b of the string supporting unit 5b as the connection object can be seen from the opening of the top surface of the upper beam 1, the delay unit 5a can be easily connected to the string supporting unit 5b as the connection object. In the conventional art, it is necessary to assemble the delay unit 5a according to each of the first to fourth embodiments while checking the connection state of the drive shaft 11 and the windup shaft 52, but the connection state cannot be observed, and therefore, the cost (burden) for assembly is large.

In the delay unit 5a according to each of the first to fourth embodiments, as shown in fig. 18 (a), the claw portion 558 is fitted into and gripped by the projection portion 50b of the support housing 50, and the shaft portion 561 (in the illustrated example, an octagonal shaft) of the output shaft member 56 of the delay unit 5a is connected to the shaft hole 531a (in the illustrated example, an octagonal shaft hole) of the cam shaft 531 of the obstacle detection stopper 53, but the delay unit 5a may be configured such that: the shaft connection is realized by directly grasping (fitting) the shaft portion 561 and the cam shaft 531.

For example, as shown in fig. 18 (b), the following configuration may be adopted: the shaft connection is realized by directly grasping (fitting) the shaft portion 561 and the cam shaft 531. Referring to fig. 18 (b), in the delay unit 5a, the shaft portion 561 of the output shaft member 56 is formed in a cylindrical shape in place of the pawl portion 558, and protrusions 561b are provided at two positions opposing each other on the inner peripheral surface 561a thereof. Two elastically deformable engagement pieces 561d are provided on the inner circumferential surface 561a of the shaft portion 561 at two positions that intersect the two opposing projections 561b at right angles, without interfering with the insertion of the drive shaft 11. A fitting projection 561c is provided on an outer surface of each engagement piece 561d with respect to an axial center of the inner circumferential surface 561 a. Further, instead of forming the coupling portion of the cam shaft 531 of the obstacle detecting and stopping device 53 as the shaft hole 531a shown in fig. 18 (a), the outer peripheral surface of the cam shaft 531 is formed in a two-step shape having a portion 5310 and a portion 5319, and recesses 531b are provided at two positions of the portion 5319 facing each other. Further, a fitting wall 531c having a diameter smaller than the diameter of the inner peripheral wall of the shaft hole 5313 constituting the camshaft 531 and through which the drive shaft 11 can be inserted is provided on the surface of the connecting portion of the camshaft 531.

In addition, the two opposing protrusions 561b of the shaft portion 561 are engageable with the two opposing recesses 531b of the portion 5319 of the camshaft 531, and in a state of being connected by this engagement, the connection-side distal end portion of the shaft portion 561 is positioned at a position substantially in contact with the portion 5310 of the camshaft 531, and the fitting projection 561c of the elastically deformable engagement piece 561d of the shaft portion 561 is fitted into and caught by the fitting wall 531c of the camshaft 531, thereby constituting an engagement portion for engaging the shaft portion 561 of the delay unit 5a with the camshaft 531. In this engaged and connected state, the support housing 50 rotatably supports the cylindrical shaft portion 561 of the output shaft member 56. Fig. 18 (b) shows an example, and various modifications are also conceivable, such as interchanging the shapes of the convex portion 561b and the concave portion 531 b.

By configuring and coupling the shaft portion 561 and the cam shaft 531 to each other as illustrated in fig. 18 (b), the shaft portion 561 and the cam shaft 531 can be coupled to each other so as not to be relatively rotatable without providing the claw portion 558 and the protrusion portion 50b as illustrated in fig. 18 (a), and the delay unit 5a and the string supporting unit 5b can be engaged with each other so as not to be swung in the left-right direction.

(fifth embodiment)

Next, the rope support device 5 having the delay unit 5a of the fifth embodiment will be described. Fig. 19 is an exploded perspective view showing a schematic configuration of a delay unit 5a according to a fifth embodiment of the present invention. Fig. 20 and 21 are perspective views each showing an assembly method of the rope support device 5 including a modification of the delay unit 5a according to the fifth embodiment of the present invention and a schematic configuration thereof. Further, the delay unit 5a and the rope support device 5 of the fifth embodiment shown in fig. 19 to 21 are illustrated as a modification of the first embodiment. Further, similar modifications can be made from the second to fourth embodiments. In addition, the same reference numerals are given to the same structural elements as those of the above-described embodiments.

In the first to fourth embodiments, the example in which the delay unit 5a is disposed side by side outside the support case 50 of the rope support device 5 is explained, and in the fifth embodiment, the following configuration is adopted: the delay unit 5a is supported inside the support case 50 of the rope support device 5 and on the drive shaft 11, and the windup shaft 52 rotates in conjunction with the rotation of the tilt drum 51 after a predetermined delay amount has elapsed.

As shown in fig. 19, the delay unit 5a according to the fifth embodiment includes an output shaft member 56, a brake spring 57, a spring housing 58, a rotary relay plate 59, and an input shaft member 60, as in the first embodiment (see fig. 3), but the shape of the housing member 55 housing the above members and the shape of the input shaft member 60 are partially different from those of the first embodiment.

Referring to fig. 19, the housing member 55 of the delay unit 5a of the fifth embodiment is configured in a shape suitable for being supported inside the support housing 50 of the rope support device 5, as compared with the first embodiment, and the output shaft member 56, the brake spring 57, and the spring housing 58 are commonly used in various rope support devices 5 along with the change in the shape of the input shaft member 60.

The input shaft member 60 in the delay unit 5a according to the fifth embodiment has substantially the same shape as that of the first embodiment, but the cylindrical shaft portion 606 having the substantially quadrangular-hole-shaped shaft hole 602 directly connected to the drive shaft 11 from the surface on the drive transmission input side of the flange 604 of the input shaft member 60 has a different shape.

When the delay unit 5a is supported inside the support case 50 of the rope support device 5, as shown in fig. 20 and 21, the shaft portion 606 of the input shaft member 60 is rotatably supported by the bearing portion 50c of the support case 50 of the rope support device 5.

Further, the output shaft member 56, the brake spring 57, the spring housing 58, and the rotation relay plate 59 have the same shape as in the first embodiment, and a delay amount of the sum of the delay amount between the input shaft member 60 and the rotation relay plate 59 and the delay amount between the rotation relay plate 59 and the output shaft member 56 is generated before the rotation of the input shaft member 60 is transmitted to the output shaft member 56.

The housing member 55 in the delay unit 5a according to the fifth embodiment is configured to have a shape suitable for being supported inside the support case 50 of the rope support device 5, and in this embodiment, a leg portion 550c for forming a lower corner portion 550b is provided in a cylindrical body having a housing portion 556 for housing the output shaft member 56, the brake spring 57, the spring case 58, the rotation relay plate 59, and the input shaft member 60, and the leg portion 550c has a substantially E-shaped cross section and extends downward.

The inner peripheral surface of the housing portion 556 of the case member 55 rotatably supports the peripheral edge of the flange 604 of the input shaft member 60, and the spring case 58 is fixed so as not to rotate by engaging the protrusions 557 provided on the inner peripheral surface of the housing portion 556 with the pair of recesses 582 provided on a part of the spring case 58. The shaft 568 and the flange 567 of the output shaft member 56 are relatively rotatably supported by a circular opening 559c and an opening side 559a on one side surface (drive transmission output side) of the housing member 55. Therefore, the shaft portion 561 of the output shaft member 56 protrudes from the circular opening portion 559c of the case member 55, and is engaged with the cam shaft 531 of the obstacle detection stop device 53 so as to be rotatable integrally therewith.

As shown in fig. 20, in the delay unit 5a of the fifth embodiment configured as described above, first, the delay unit 5a is inserted into the string support unit 5b including the inclined drum 51, the winding shaft 52, and the obstacle detection stop device 53 so that the shaft portion 561 of the output shaft member 56 of the delay unit 5a engages with the shaft hole 531a of the cam shaft 531 of the obstacle detection stop device 53, and the delay unit 5a and the string support unit 5b are integrated. Next, the delay unit 5a, the obstacle detection stop device 53, the winding shaft 52, and the inclined drum 51 are placed and stored in the storage portions 50d, 50e, 50f, and 50g of the support case 50, respectively, to constitute the rope support device 5. Then, as shown in fig. 21, the drive shaft 11 is inserted into the rope support 5.

As a result, as shown in fig. 21, the delay unit 5a according to the fifth embodiment is connected to the winding shaft 52 via the obstacle detection stop device 53 on the drive shaft 11, and the winding shaft 52 is rotated in conjunction with the rotation of the tilt drum 51 by a predetermined delay amount, and the delay unit 5a is housed in the support case 50 of the rope support device 5.

In the case member 55 of the delay unit 5a according to the fifth embodiment, the lower corner 550b of the leg portion 550c is stably supported inside the support case 50 of the rope support device 5 so as not to be displaced in the left-right direction and the front-rear direction. Further, the drive shaft 11 is inserted into the rope support device 5 supported in the upper beam 1, so that the delay unit 5a is not displaced in the vertical direction (and the lateral direction).

Even if the delay unit 5a and the rope support device 5 of the first embodiment are modified as described above and the delay unit 5a is supported inside the support housing 50 of the rope support device 5 as in the fifth embodiment, it is possible to achieve the rotation operation of the tilt roller 51 and the wind-up shaft 52 by one drive shaft 11 and to solve the problem that the lower beam 8 is raised or lowered by the tilt operation when the tilt operation without raising or lowering the blade 4 is desired. In particular, it is possible to solve the problem that the folded portion of the blade is tilted after being raised when the tilting operation is performed with the lower beam 8 in a non-lowermost position.

Therefore, the delay unit 5a according to the present invention is a device for the rope support device 5 capable of performing the operation of raising and lowering and tilting the blade 4 by one drive shaft 11, and is provided in the drive shaft 11 in parallel with the outside or inside of the support case 50 in which the tilt drum 51 and the windup shaft 52 are supported so as to be rotatable about the one drive shaft 11 as a rotation axis, and the windup shaft 52 is rotated in conjunction with the rotation of the tilt drum 51 by a predetermined delay amount.

In particular, the delay unit 5a of the rope support 5 of the present invention is configured to: an output shaft portion (the shaft portion 561 of the output shaft member 56) that rotates in conjunction with the rotation of the drive shaft 11 by a predetermined delay amount is provided, and this output shaft portion is directly or indirectly connected to the bearing portion of the windup shaft 52.

Further, a horizontal louver according to the present invention includes: the lift operation of the blade 4 can be performed by winding or unwinding the lift cord 10 by the plurality of winding shafts 52 constituting the cord winding device in accordance with the rotation of one driving shaft 11, the direction control cord 9 is suspended from the plurality of inclined rollers 51 (or the inclined rollers 51a of the direction control cord supporting member 6), the plurality of inclined rollers 51 (or the inclined rollers 51a of the direction control cord supporting member 6) can be rotated by the rotation of the driving shaft 11 to adjust the angle of the blade 4 supported by the direction control cord 9, when the blade 4 is reversed after the lift operation of the blade 4, the rotation of the driving shaft 11 is transmitted to the inclined rollers 51 (or 51a), the winding shaft 52 is prevented from rotating during the angle adjustment of the blade 4, and the driving shaft 11 and the winding shaft 52 rotate in conjunction after the predetermined relative rotation, and a braking device (a housing member 55a, a winding shaft 52 of the delay unit 5a) is separately provided from the cord winding device, 55b, a brake spring 57, and a spring housing 58) which is supported in a non-rotatable manner in the upper beam 1 housing the rope reel and the tilting drum 51 (or 51a), thereby preventing the winding shaft 52 from rotating during angular adjustment of the blade 4.

This makes it possible to perform the rotation operation of the tilting roller 51 and the windup shaft 52 by one drive shaft 11, and to solve the problem that the lower beam 8 is raised or lowered by the tilting operation when the tilting operation is desired without causing the blade 4 to be raised or lowered. In particular, the problem that the folded portion of the blade is tilted after being lifted when the tilting operation is performed with the underbeam 8 at a position other than the lowest position can be solved, and the improvement of the assembling property, the miniaturization, the generalization, the reduction of the burden of the parts management, and the reduction of the cost can be facilitated, and the practicability is excellent.

The present invention has been described above by way of examples of specific embodiments, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical spirit thereof. For example, in the above-described embodiment, the example in which the connection is made via the obstacle detection stopping device 53 has been mainly described, but the present invention is not limited to this, and the operation and effect according to the present invention can be exhibited as long as the present invention is in a form of directly or indirectly engaging with the winding shaft 52.

In the above-described embodiment, the example in which the delay unit 5a is selected and used mainly according to the type of the string supporting unit 5b has been described, but for example, the following configuration may be adopted: instead of using the delay unit 5a of the second embodiment, the rope support unit 5b shown in fig. 7 is applied to the delay unit 5a of the first embodiment by preparing a rotary relay plate 59 that does not generate a delay amount, and thus the same delay amount as that obtained when using the delay unit 5a of the second embodiment can be obtained, and the housing members 55a and 55b can be shared.

(horizontal blind having cord support device for hanging direction control cord with annular upper end)

Next, a horizontal blind including the cord support devices 5L, 5M, and 5R according to the present invention will be described with reference to fig. 22.

First, in the horizontal blind shown in fig. 22, the cord support devices 5L, 5M, and 5R according to the present invention are disposed in the upper member 1 on the left end side, the center side, and the right end side of the upper member 1, respectively.

The rope support devices 5L, 5M, and 5R suspend and support the multi-layer blade 4 via a pair of string-shaped direction control ropes 9 suspended from the indoor side and the outdoor side, respectively, and a lower beam 8 is suspended and supported at the lower ends of the direction control ropes 9. The upper member 1 is fixed to a ceiling-side mounting surface via a bracket 7.

Further, a thin rope-shaped lift rope 10 is suspended from each of the rope support devices 5L, 5M, and 5R through a substantially central portion in the front-rear direction of the bottom surface of the upper beam 1, and a lower end of the lift rope 10 is attached and fixed to the lower beam 8 after passing through an insertion hole (not shown) provided at a substantially central portion in the front-rear direction of each blade 4. The hanging position of the lift cord 10 may be the end of each blade 4 in the front-rear direction.

That is, each of the rope support devices 5L, 5M, and 5R in this example is configured to: an inclined drum 51 on which a pair of direction control ropes 9 hanging from the indoor side and the outdoor side are suspended and an inclined cylindrical winding shaft 52 on which the lift rope 10 can be wound or unwound are provided side by side on the drive shaft 11 in the shape of a quadrangular bar and supported by a support case 50. Further, an obstacle detection stopping device 53 is provided on the tip end side of the winding shaft 52.

In particular, in each of the rope support devices 5L, 5M, and 5R of the present example, the upper end portions of a pair of direction control ropes 9 hanging from the indoor side and the outdoor side are formed into a ring shape and hung on the tilt drum 51 to hang the direction control ropes 9, and the rotation of the tilt drum 51 rotates the blades 4 supported by the lateral ropes of the direction control ropes 9. Further, a blade holding plate 12 is provided on the uppermost blade 4, and the blade holding plate 12 holds the blade 4 supported by the lateral ropes of the direction control rope 9. The blade holding plate 12 guides the hanging of the pair of direction control ropes 9 hanging from the indoor side and the outdoor side, and is attached to the blade 4 from below so as to hold the lateral ropes of the direction control ropes 9 supporting the uppermost blade 4 together with the blade 4. Further, the blade holding plate 12 is provided with a notch or an insertion hole (not shown) so as not to interfere with the movement of the lift cord 10.

Therefore, the upper ends of the pair of direction control cords 9 respectively hanging from the indoor side and the outdoor side are connected to form an annular upper end portion, and the inclined roller 51 has a V-shaped groove in which the annular upper end portion is hooked with a predetermined frictional force, and details thereof will be described later.

Here, in each of the rope support devices 5L, 5M, and 5R shown in fig. 22, the delay unit 5a shown in fig. 2 and the like is not provided, and the inclined drum 51 and the winding shaft 52 are connected to the drive shaft 11 so as not to be rotatable with respect to the drive shaft 11.

However, the respective string supporting devices 5L, 5M, and 5R may be configured in the same manner as the string supporting device 5 shown in fig. 2, that is, may be configured such that: the tilt drum 51 is connected to the drive shaft 11 so as to be non-rotatable with respect to the drive shaft 11, and the windup shaft 52 is not connected to (not engaged with) the drive shaft 11, and a delay unit 5a is provided which operates so that the windup shaft 52 rotates in conjunction with the rotation of the tilt drum 51 by a predetermined delay amount.

In the present example, an example is shown in which three cord support devices 5L, 5M, and 5R are provided in the horizontal blind, but two cord support devices may be provided, or four or more cord support devices may be provided. Further, the rope support device according to the present invention described later may be configured as a device that supports only the inclined roller 51a having the V-groove in which the pair of direction control ropes 9 respectively hanging from the indoor side and the outdoor side are hung, like the direction control rope support member 6 shown in fig. 1.

An operation unit 2 is provided on the right end side in the upper beam 1. In the case of the illustrated manual operation, the operation unit 2 includes a pulley (not shown) capable of hooking the operation rope 3 in the form of an endless rope (or an endless ball chain), and is capable of rotating the drive shaft 11 by pulling the operation rope 3 outward from the upper beam 1.

Alternatively, when the operation unit 2 is of an electric type, a motor capable of rotationally operating the drive shaft 11 in response to an operation signal from the outside may be used. Therefore, the form of the operation unit 2 may be any form as long as it can transmit the rotation of the drive shaft 11 according to the operation of the operator.

Therefore, in the horizontal blind shown in fig. 22, the tilt operation for adjusting the angle of the louver 4 can be realized by rotating the drive shaft 11 by operating the operation cord 3 and rotating the tilt drum 51 of each cord support device 5L, 5M, 5R in accordance with the rotation of the drive shaft 11. Further, when the drive shaft 11 is rotated more than the number of turns required for the tilting operation, the raising and lowering operation of raising or lowering the blade 4 can be performed while maintaining the state after the blade 4 is rotated by the tilting operation.

Hereinafter, the structure and operation of the typical rope support device 5M among the rope support devices 5L, 5M, and 5R will be described in more detail in order from the viewpoint of the rope arrangement of the direction control rope 9, mainly with respect to the conventional art and the art related to the present invention (first to fourth embodiments).

(Direction control cord configuration based on prior art)

Fig. 23 (a) shows a partial front view of the periphery of the rope support 5M from which the direction control rope 9 having one looped upper end portion is suspended according to the related art, and (b) shows a side view of the periphery of the rope support 5M with respect to the direction control rope 9 having one looped upper end portion (the description of the lift rope 10 is omitted).

First, as shown in fig. 23 (a), in the rope support device 5M placed in the upper frame 1, a winding shaft 52 (shown in a non-sectional view) and an inclined roller 51 (shown in a sectional view) are provided so as to be unrotatable with respect to the drive shaft 11, and the winding shaft 52 and the inclined roller 51 are supported by the support case 50, respectively. The winding shaft 52 has an inclined elongated tubular shape that can wind or unwind the lift cord 10 by fixedly attaching the upper end of the lift cord 10, and the lower end of the lift cord 10 is fixedly attached to the lower beam 8 after passing through, for example, an insertion hole (not shown) provided at a substantially central portion in the front-rear direction of each blade 4 (see fig. 22).

The multi-layer blades 4 are supported by one or two lateral ropes 9a provided at predetermined intervals between a pair of direction control ropes 9 hanging from the indoor side and the outdoor side, respectively. Further, the uppermost blade 4 is provided with a blade holding plate 12 for holding the blade 4 supported by the lateral ropes 9a of the direction control rope 9.

In the prior art, as shown in fig. 23 (b), upper ends 91F and 91R of a pair of direction control cords 9 respectively hanging from the indoor side and the outdoor side are connected by a locking member (e.g., a caulking metal member) 13 to form one annular upper end portion. In the example shown in fig. 23 (b), the locking member 13 is disposed above the vane 4 within a range that does not prevent the vane 4 from rotating.

As shown in fig. 23 (a), the inclined roller 51 has a V-shaped groove 51V whose width becomes narrower toward the central axis of the inclined roller 51, and the groove bottom 51b of the V-shaped groove 51V has a width smaller than the cross-sectional diameter of the control cord 9. The normal direction control cord 9 is not completely circular in cross section, but has a substantially square cross-sectional shape having long sides and short sides, and the groove bottom 51b has a width smaller than the short sides.

That is, the inclined roller 51 has the upper end of the loop of the direction control cord 9 hooked by the V-groove 51V in a state where a predetermined frictional force is generated.

In this way, in the rope support device 5M including the tilt roller 51, the tilt roller 51 rotates in accordance with the rotation of the drive shaft 11, and thereby the multilayer blade 4 supported by the lateral rope 9a of the direction control rope 9 can be rotated, wherein the tilt roller 51 is configured such that: the one annular upper end portion of the direction control cord 9 is hung by the V-shaped groove 51V in a state where a predetermined frictional force is generated.

In particular, compared to the configuration in which the direction control cord 9 is suspended by the suspension member 511 as shown in fig. 7, the configuration of the inclined drum 51 in which the direction control cord 9 is suspended by the V-shaped groove 51V is advantageous in that the load in the operation of rotating the drive shaft 11 by the operation cord 3 can be significantly reduced.

That is, as shown in fig. 7, in the configuration in which the direction control cord 9 is suspended by the suspension member 511, the suspension member 511 is formed of a torsion coil spring, and both ends of the torsion coil spring are bent to form the direction control cord fixing portion 511a and the locking end portion 511b in a loop shape. The upper ends of the pair of front and rear direction control cords 9 are attached to and fixed to the direction control cord fixing portions 511a and suspended and supported. The suspension member 511 is tightly wound around and fixed to the inclined drum 51, and the suspension member 511 and the inclined drum 51 rotate integrally until the locking end 511b abuts against a wall portion formed on the support housing 50, and when the locking end 511b abuts against the wall portion formed on the support housing 50, the fastening force thereof becomes weak and the inclined drum 51 rotates idly. Thereby, the angle of each blade 4 can be adjusted in phase via the direction control cord 9 in accordance with the rotation of the tilt drum 51. However, since a load corresponding to a force that weakens the tightening force of the suspending member 511 is applied to the operation cord 3 at this time, it is more advantageous to use the inclined roller 51 configured to suspend the direction control cord 9 by using the V-groove 51V as shown in fig. 2 from the viewpoint of reducing the operation force.

However, in the form of the horizontal blind, the blades 4 have various lengths and widths, and the number of layers of the blades 4 is also various, so that the load applied to the direction control cord 9 is also various. Therefore, as one form of the horizontal blind, there is a case where the frictional resistance against the direction control cord 9 generated by the V-groove 51V is insufficient, and although the operation force of the operation cord 3 is reduced, the direction control cord 9 slips greatly while moving in the V-groove 51V, and the operability is deteriorated. In order to improve this, the shape of the V-groove 51V may be changed according to the form of the horizontal louver, but a technique capable of more easily changing or adjusting the frictional resistance is desired.

In the technique of providing a friction member separately from the direction control cord 9, the friction member is changed between a contact state and a non-contact state by the rotation of the tilt drum 51, and therefore, the contact between the friction member and the tilt drum 51 is insufficient due to the swing of the direction control cord 9 or the like, and there is a possibility that the blade 4 may be rotated poorly.

Therefore, the rope support device 5M according to the present invention is configured to: the plurality of annular upper end portions of the direction control cord 9 are hung by the outer peripheral surface (in this example, the V-groove 51V) formed on the tilt roller 51 in a state where a predetermined frictional force is generated, and the direction control cord 9 rotates with the rotation of the tilt roller 51 to rotate the blade 4, and the cord support device 5M of the first to fourth embodiments will be described below.

(rope supporting device of embodiment one)

Fig. 24 (a) is a partial side view showing the periphery of a string supporting device 5M according to an embodiment of the present invention, and (b) is a schematic diagram showing the string arrangement thereof. Note that (a) in fig. 24 is illustrated in a manner comparable to (b) in fig. 23, and illustration of the winding shaft 52 and the lift cord 10 is omitted. Further, the winding shaft 52 may not be provided, and only the inclined drum 51 may be provided.

As shown in fig. 24 (a) and (b), in the rope support device 5M placed in the upper beam 1, the inclined roller 51 is provided so as to be unrotatable with respect to the drive shaft 11, and the inclined roller 51 is supported by the support housing 50.

The multi-layer blades 4 are supported by one or two lateral ropes 9a provided at predetermined intervals between a pair of direction control ropes 9 hanging from the indoor side and the outdoor side, respectively. Further, the uppermost blade 4 is provided with a blade holding plate 12 for holding the blade 4 supported by the lateral ropes 9a of the direction control rope 9.

Similarly to fig. 23 (a), the inclined roller 51 shown in fig. 24 (a) and (b) has a V-shaped groove 51V whose width is narrower toward the central axis of the inclined roller 51, and the groove bottom 51b of the V-shaped groove 51V has a width smaller than the cross-sectional diameter of the control cord 9. The normal direction control cord 9 is not completely circular in cross section, but has a substantially square cross-sectional shape having long sides and short sides, and the groove bottom 51b has a width smaller than the short sides.

As shown in fig. 24 (b), the upper end 91F of the direction control cord 9 hanging down on the indoor side is hung from the indoor side in the V-groove 51V of the tilt drum 51, and then is locked to the direction control cord 9 hanging down on the outdoor side by the locking member (e.g., caulking metal member) 13 a. Further, an upper end 91R of the direction control cord 9 hanging down on the outdoor side is hung from the outdoor side in the V-groove 51V of the inclined drum 51, and then is locked to the direction control cord 9 hanging down on the indoor side by a locking member (for example, a caulking metal member) 13 b. In the example shown in fig. 24 (a) and (b), the locking members 13a and 13b are disposed above the vane 4 in a range that does not interfere with the rotation of the vane 4, but may be formed as follows: the locking members 13a and 13b are located below the vane 4 within a range that does not prevent the vane 4 from rotating.

Thus, the direction control cord 9 having the two looped upper end portions is hooked in the V-shaped groove 51V, and the frictional resistance when the blade 4 is rotated by the rotation of the direction control cord 9 with the rotation of the tilt roller 51 can be increased.

In the case of forming two annular upper end portions, either the rope arrangement of the indoor-side direction control rope 9 or the rope arrangement of the outdoor-side direction control rope 9 may be located on the upper side (or the lower side), but the locking members 13a and 13b need to be locked in a state where they are not twisted in the rotation range of the blade 4. Since the cross-sectional shape of the normal direction control cord 9 is a substantially square shape having long sides and short sides, the surfaces of the direction control cord 9 may be opposed to each other and locked by the locking members 13a and 13b so as not to be twisted when forming the two annular upper end portions.

(rope support device of the second embodiment)

Fig. 25 (a) is a partial side view showing the periphery of the string supporting device 5M according to the second embodiment of the present invention, and (b) is a schematic diagram showing the string arrangement thereof. Note that (a) in fig. 25 is illustrated in a manner comparable to (b) in fig. 23, and illustration of the winding shaft 52 and the lift cord 10 is omitted. Further, the winding shaft 52 may not be provided, and only the inclined drum 51 may be provided.

As shown in fig. 25 (a) and (b), in the rope support device 5M placed in the upper beam 1, the inclined roller 51 is provided so as to be unrotatable with respect to the drive shaft 11, and the inclined roller 51 is supported by the support housing 50.

The multi-layer blades 4 are supported by one or two lateral ropes 9a provided at predetermined intervals between a pair of direction control ropes 9 hanging from the indoor side and the outdoor side, respectively. Further, the uppermost blade 4 is provided with a blade holding plate 12 for holding the blade 4 supported by the lateral ropes 9a of the direction control rope 9.

Similarly to fig. 23 (a), the inclined roller 51 shown in fig. 25 (a) and (b) has a V-shaped groove 51V whose width is narrower toward the central axis of the inclined roller 51, and the groove bottom 51b of the V-shaped groove 51V has a width smaller than the cross-sectional diameter of the control cord 9. The normal direction control cord 9 is not completely circular in cross section, but has a substantially square cross-sectional shape having long sides and short sides, and the groove bottom 51b has a width smaller than the short sides.

As shown in fig. 25 (b), the upper end 91F of the direction control cord 9 hanging down on the indoor side is hung from the indoor side in the V-groove 51V of the tilt drum 51, and then is locked to the direction control cord 9 hanging down on the outdoor side by the locking member (e.g., caulking metal member) 13. Further, the upper end 91R of the direction control cord 9 hanging down on the outdoor side is hung from the outdoor side in the V-groove 51V of the tilt drum 51, and then wound along the uppermost lateral cord 9a, and is locked to the direction control cord 9 hanging down on the outdoor side together with the upper end 91F by the locking member (e.g., caulking metal member) 13. In the example shown in fig. 25 (a) and (b), the locking member 13 is disposed above the vane 4 within a range that does not prevent the vane 4 from rotating, but may be formed as follows: the locking member 13 is located below the vane 4 within a range that does not hinder the rotation of the vane 4.

Thus, the direction control cord 9 having the two looped upper end portions is hooked in the V-shaped groove 51V, and the frictional resistance when the blade 4 is rotated by the rotation of the direction control cord 9 with the rotation of the tilt roller 51 can be increased.

In the second embodiment shown in fig. 25, the frictional resistance can be increased without impairing the design property because the locking member 13 is located outside the room as compared with the first embodiment shown in fig. 24.

In this example, when the two annular upper end portions are formed, either the rope arrangement of the indoor-side direction control rope 9 or the rope arrangement of the outdoor-side direction control rope 9 may be located on the upper side (or the lower side), but the locking member 13 needs to lock the indoor-side direction control rope and the outdoor-side direction control rope without twisting in the rotation range of the vane 4. Since the cross-sectional shape of the normal direction control cord 9 is a substantially square shape having long sides and short sides, the surfaces of the direction control cord 9 may be opposed to each other and locked by the locking member 13 so as not to be twisted when forming the two annular upper end portions.

(rope support device of the third embodiment)

Fig. 26 (a) is a partial side view showing the periphery of the string supporting device 5M according to the third embodiment of the present invention, and (b) is a schematic diagram showing the string arrangement thereof. Note that (a) in fig. 26 is illustrated in a manner comparable to (b) in fig. 23, and illustration of the winding shaft 52 and the lift cord 10 is omitted. Further, the winding shaft 52 may not be provided, and only the inclined drum 51 may be provided.

As shown in fig. 26 (a) and (b), in the rope support device 5M placed in the upper beam 1, the inclined roller 51 is provided so as to be unrotatable with respect to the drive shaft 11, and the inclined roller 51 is supported by the support housing 50.

The multi-layer blades 4 are supported by one or two lateral ropes 9a provided at predetermined intervals between a pair of direction control ropes 9 hanging from the indoor side and the outdoor side, respectively. Further, the uppermost blade 4 is provided with a blade holding plate 12 for holding the blade 4 supported by the lateral ropes 9a of the direction control rope 9.

Similarly to fig. 23 (a), the inclined roller 51 shown in fig. 26 (a) and (b) has a V-shaped groove 51V whose width is narrower toward the central axis of the inclined roller 51, and the groove bottom 51b of the V-shaped groove 51V has a width smaller than the cross-sectional diameter of the control cord 9. The normal direction control cord 9 is not completely circular in cross section, but has a substantially square cross-sectional shape having long sides and short sides, and the groove bottom 51b has a width smaller than the short sides.

As shown in fig. 26 (b), the upper end 91F of the direction control cord 9 hanging down on the indoor side is hung from the indoor side in the V-groove 51V of the tilt drum 51, and then is locked to the direction control cord 9 hanging down on the outdoor side by the locking member (e.g., caulking metal member) 13 a. Further, the upper end 91R of the direction control cord 9 hanging down on the outdoor side is hung from the outdoor side in the V-groove 51V of the tilt drum 51, then wound along the uppermost lateral cord 9a, and further locked to the direction control cord 9 hanging down on the outdoor side by another locking member (for example, a caulking metal member) 13 b. In the example shown in fig. 26 (a) and (b), the two locking members 13a and 13b are disposed above and below the vane 4 in a range that does not interfere with the rotation of the vane 4, but may be formed as follows: both the locking members 13a and 13b are located below (or above) the vane 4 within a range that does not hinder the rotation of the vane 4.

Thus, the direction control cord 9 having the two looped upper end portions is hooked in the V-shaped groove 51V, and the frictional resistance when the blade 4 is rotated by the rotation of the direction control cord 9 with the rotation of the tilt roller 51 can be increased.

In the third embodiment shown in fig. 26, both the locking members 13a and 13b are located outside the room as compared with the first embodiment shown in fig. 24, and therefore, the frictional resistance can be increased without impairing the design, as in the second embodiment shown in fig. 25.

Further, in the second embodiment shown in fig. 25, since the three direction control ropes 9 are locked by the locking members 13, there is a possibility that the work load becomes large, whereas in the third embodiment shown in fig. 26, since the number of ropes locked by the locking members 13a and 13b can be two, the work load can be reduced.

In this example, when the two annular upper end portions are formed, either the indoor-side direction control cord 9 cord arrangement or the outdoor-side direction control cord 9 cord arrangement may be located on the upper side (or the lower side), but the two locking members 13a and 13b need to be locked in a state where they are not twisted within the range of rotation of the vane 4. Since the cross-sectional shape of the normal direction control cord 9 is a substantially square shape having long sides and short sides, the surfaces of the direction control cord 9 may be opposed to each other and locked by the locking members 13a and 13b so as not to be twisted when forming the two annular upper end portions.

(rope support device of the fourth embodiment)

Fig. 27 (a) is a partial side view showing the periphery of the string supporting device 5M according to the fourth embodiment of the present invention, and (b) is a schematic diagram showing the string arrangement thereof. Note that (a) in fig. 27 is illustrated in a manner comparable to (b) in fig. 23, and illustration of the winding shaft 52 and the lift cord 10 is omitted. Further, the winding shaft 52 may not be provided, and only the inclined drum 51 may be provided.

As shown in fig. 27 (a) and (b), in the rope support device 5M placed in the upper beam 1, the inclined roller 51 is provided so as to be unrotatable with respect to the drive shaft 11, and the inclined roller 51 is supported by the support housing 50.

The multi-layer blades 4 are supported by one or two lateral ropes 9a provided at predetermined intervals between a pair of direction control ropes 9 hanging from the indoor side and the outdoor side, respectively. Further, the uppermost blade 4 is provided with a blade holding plate 12 for holding the blade 4 supported by the lateral ropes 9a of the direction control rope 9.

Similarly to fig. 23 (a), the inclined roller 51 shown in fig. 27 (a) and (b) has a V-shaped groove 51V whose width is narrower toward the central axis of the inclined roller 51, and the groove bottom 51b of the V-shaped groove 51V has a width smaller than the cross-sectional diameter of the control cord 9. The normal direction control cord 9 is not completely circular in cross section, but has a substantially square cross-sectional shape having long sides and short sides, and the groove bottom 51b has a width smaller than the short sides.

As shown in fig. 27 (b), the upper end 91F of the direction control rope 9 hanging on the indoor side is first hung in the V-shaped groove 51V of the inclined drum 51 from the indoor side, then wound along the uppermost lateral rope 9a, and hung on the V-shaped groove 51V for the second time, and then locked to the direction control rope 9 hanging on the outdoor side by the locking member (for example, caulking metal member) 13 b. The upper end 91R of the direction control cord 9 hanging down on the outdoor side is locked by another locking member (e.g., a caulking metal member) 13a to a cord portion of the direction control cord 9 hanging down on the indoor side when the cord is first hung on the V-shaped groove 51V.

Thus, the direction control cord 9 having the two looped upper end portions is hooked in the V-shaped groove 51V, and the frictional resistance when the blade 4 is rotated by the rotation of the direction control cord 9 with the rotation of the tilt roller 51 can be increased.

In addition, in the fourth embodiment shown in fig. 27, since both the locking members 13a and 13b are located outside the room as compared with the first embodiment shown in fig. 24, the frictional resistance can be increased without impairing the design, as in the second and third embodiments shown in fig. 25 and 26.

Further, in the second embodiment shown in fig. 25, since the three direction control ropes 9 are locked by the locking members 13, there is a possibility that the work load becomes large, whereas in the fourth embodiment shown in fig. 27, since the number of ropes locked by the locking members 13a and 13b can be two, the work load can be reduced.

In this example, when the two annular upper end portions are formed, either the indoor-side direction control cord 9 cord arrangement or the outdoor-side direction control cord 9 cord arrangement may be located on the upper side (or the lower side), but the two locking members 13a and 13b need to be locked in a state where they are not twisted within the range of rotation of the vane 4.

While the present invention has been described above by referring to fig. 24 to 27 by way of specific examples, the present invention is not limited to the above examples, and various modifications can be made without departing from the scope of the technical idea. For example, although the above-described embodiment has been described mainly with respect to the example in which the cord arrangement shown in fig. 24 to 27 is applied to the cord support device 5M located at the center in the left-right direction in the horizontal blind shown in fig. 22, the cord arrangement shown in fig. 26 can be applied to all the cord support devices 5L, 5R, and 5M.

However, the rope arrangement shown in fig. 24 to 27 may be applied only to the rope support device 5M, and the rope arrangement shown in fig. 23 (b) may be applied to the other rope support devices 5L and 5R. Alternatively, the rope arrangement shown in fig. 24 to 27 may be applied only to the rope support devices 5L and 5R, and the rope arrangement shown in (b) of fig. 23 may be applied to the rope support device 5M. That is, the rope arrangement shown in fig. 24 to 27 is applied in a state of being well balanced in the left-right direction including the case where more rope support devices are provided. This makes it possible to change or adjust the frictional resistance involved in the hanging of the window blind for various horizontal blinds.

Further, by appropriately combining the cord support devices of the first to fourth embodiments shown in fig. 24 to 27, the frictional resistance involved in the hanging can be changed or adjusted for a wider variety of horizontal blinds.

In the example of the rope support device according to the first to fourth embodiments shown in fig. 24 to 27, the two annular upper end portions of the pair of direction control ropes 9 on the indoor side and the outdoor side are formed and are hooked in the V-shaped groove 51V, but the rope support device may be configured to have three or more annular upper end portions and be hooked in the V-shaped groove 51V.

Further, in the above example, the example in which the locking member 13 (or 13a, 13b) is used to form the plurality of annular upper end portions of the pair of direction control cords 9 on the indoor side and the outdoor side has been described, but the locking may be performed by any locking method such as adhesion, welding, sewing, or the like.

Further, in the above example, the example in which the sectional shape of the direction control cord 9 is substantially square and the outer peripheral surface of the inclined drum 51 is formed in the specific shape of the V-groove 51V has been described, but the present invention is not limited to this, and any sectional shape of the direction control cord 9 and any shape of the outer peripheral surface of the inclined drum 51 on which the direction control cord 9 is hung can be adopted as long as the shape can generate a predetermined frictional force.

(availability in industry)

According to the present invention, since the delay unit and the string supporting device can be configured in a practical form, the present invention can be effectively applied to a horizontal blind in which the raising and lowering operation and the tilting operation of the blades can be performed by one drive shaft.

Further, according to the present invention, since the rope support device including the inclined drum configured to be the looped upper end portion on which the direction control rope is hung can change or adjust the frictional resistance involved in the hanging with respect to various horizontal blinds, it is effectively applicable to applications of horizontal blinds requiring the change or adjustment of the frictional resistance.

Claims (25)

1. A delay unit for a rope support device capable of performing a lifting and tilting operation of a blade using one driving shaft, the delay unit being characterized in that,

a delay unit provided on the drive shaft in parallel outside or inside a support housing that supports the inclined drum and the winding shaft so as to be rotatable with one drive shaft as a rotation shaft, and that rotates the winding shaft in conjunction with the rotation of the inclined drum by a predetermined delay amount; and the number of the first and second electrodes,

the delay unit is provided with an input shaft component, an output shaft component, a brake component and a shell component;

said input shaft member being directly connected to said drive shaft;

the output shaft member has an output shaft portion that rotates in conjunction with the rotation of the input shaft member by the predetermined delay amount to transmit the rotation, and the output shaft member engages with the input shaft member with a play of a predetermined rotation angle;

the brake member suppresses rotation of the output shaft member other than the rotation transmitted from the input shaft member;

the housing member houses the input shaft member, the output shaft member, and the brake member.

2. A rope support device comprising the delay unit according to claim 1.

3. The rope support of claim 2,

the delay unit is configured to: the rotation transmission point where the predetermined delay amount occurs is associated with the axial direction of the drive shaft.

4. The rope support of claim 2,

the delay unit is configured to: the rotation transmission portion where the predetermined delay amount occurs is associated with a direction perpendicular to the drive shaft.

5. The rope support of claim 2,

the brake member includes:

a coil-shaped brake spring that has a pair of end portions that engage with a portion of the output shaft member and that allows rotation to be transmitted from the input shaft member to the output shaft member; and

and a spring housing that is locked to the housing member of the delay unit and that accommodates the brake spring in a reduced diameter state.

6. The rope support of claim 5,

a rotation relay plate that is further provided between the input shaft member and the output shaft member and that is configured to be rotated by a predetermined delay amount, thereby making it possible to change the delay amount caused by the engagement between the input shaft member and the output shaft member.

7. Rope support according to any one of claims 2 to 6,

the housing member of the delay unit is formed by fitting a plurality of members in a direction perpendicular to the drive shaft.

8. Rope support according to any one of claims 2 to 6,

the delay unit is configured to be connected to a bearing portion of the winding shaft via an obstacle detection stop device.

9. Rope support according to any one of claims 2 to 6,

the amount of rotation by which the retard amount is generated by the retard unit is set to be equal to or greater than the angular adjustment range of the blade.

10. Rope support according to any one of claims 2 to 6,

the housing member of the delay unit has a claw portion that grips a support housing of the rope support device or a support auxiliary member of the winding shaft.

11. Rope support according to any one of claims 2 to 6,

the output shaft portion of the delay unit has a locking portion for direct or indirect connection with the bearing portion of the winding shaft.

12. A rope support device capable of performing a lifting and tilting operation of a blade using one driving shaft, the rope support device being characterized in that,

comprises an inclined drum, a winding shaft and a delay unit,

the inclined roller takes a driving shaft as a rotating shaft and is directly connected with the driving shaft,

the winding shaft is indirectly connected with the driving shaft,

the delay unit is configured to: an output shaft portion that rotates in conjunction with the rotation of the drive shaft by a predetermined delay amount, and that is directly or indirectly connected to the bearing portion of the windup shaft; and the number of the first and second electrodes,

the delay unit is provided with an input shaft component, an output shaft component, a brake component and a shell component;

said input shaft member being directly connected to said drive shaft;

the output shaft member has an output shaft portion that rotates in conjunction with the rotation of the input shaft member by the predetermined delay amount to transmit the rotation, and the output shaft member engages with the input shaft member with a play of a predetermined rotation angle;

the brake member suppresses rotation of the output shaft member other than the rotation transmitted from the input shaft member;

the housing member houses the input shaft member, the output shaft member, and the brake member.

13. The rope support of claim 12,

the delay unit is configured to: the rotation transmission point where the predetermined delay amount occurs is associated with the axial direction of the drive shaft.

14. The rope support of claim 12,

the delay unit is configured to: the rotation transmission portion where the predetermined delay amount occurs is associated with a direction perpendicular to the drive shaft.

15. The rope support of claim 12,

the brake member includes:

a coil-shaped brake spring that has a pair of end portions that engage with a portion of the output shaft member and that allows rotation to be transmitted from the input shaft member to the output shaft member; and

and a spring housing that is locked to the housing member of the delay unit and that accommodates the brake spring in a reduced diameter state.

16. The rope support of claim 15,

a rotation relay plate that is further provided between the input shaft member and the output shaft member and that is configured to be rotated by a predetermined delay amount, thereby making it possible to change the delay amount caused by the engagement between the input shaft member and the output shaft member.

17. The rope support according to any one of claims 12 to 16,

the housing member of the delay unit is formed by fitting a plurality of members in a direction perpendicular to the drive shaft.

18. The rope support according to any one of claims 12 to 16,

the delay unit is configured to be connected to a bearing portion of the winding shaft via an obstacle detection stop device.

19. The rope support according to any one of claims 12 to 16,

the amount of rotation by which the retard amount is generated by the retard unit is set to be equal to or greater than the angular adjustment range of the blade.

20. The rope support according to any one of claims 12 to 16,

the housing member of the delay unit has a claw portion that grips a support housing of the rope support device or a support auxiliary member of the winding shaft.

21. The rope support according to any one of claims 12 to 16,

the output shaft portion of the delay unit has a locking portion for direct or indirect connection with the bearing portion of the winding shaft.

22. A horizontal blind comprising the cord support device according to any one of claims 2 to 20.

23. A horizontal blind in which a plurality of winding shafts constituting a cord winding device wind or unwind a lifting cord in accordance with rotation of one driving shaft to thereby enable lifting and lowering operation of a vane, and a direction control cord is suspended from a plurality of tilt drums, and the plurality of tilt drums are rotated by rotation of the driving shaft to thereby enable adjustment of an angle of the vane supported by the direction control cord,

a plurality of delay units provided on the drive shaft in parallel with the plurality of winding shafts, respectively, for causing the winding shafts to rotate in conjunction with the rotation of the inclined drum by a predetermined delay amount;

the plurality of delay units respectively have the following shapes: a shape that can be inserted from an opening provided on a top surface of an upper beam that houses the winding shaft and the inclined drum without deforming the upper beam when the winding shaft and the inclined drum are assembled into the upper beam; and the number of the first and second electrodes,

the delay unit is provided with an input shaft component, an output shaft component, a brake component and a shell component;

said input shaft member being directly connected to said drive shaft;

the output shaft member has an output shaft portion that rotates in conjunction with the rotation of the input shaft member by the predetermined delay amount to transmit the rotation, and the output shaft member engages with the input shaft member with a play of a predetermined rotation angle;

the brake member suppresses rotation of the output shaft member other than the rotation transmitted from the input shaft member;

the housing member houses the input shaft member, the output shaft member, and the brake member.

24. A horizontal blind in which a plurality of winding shafts constituting a cord winding device wind or unwind a lifting cord in accordance with rotation of one driving shaft to thereby enable lifting and lowering operation of a vane, and a direction control cord is suspended from a plurality of tilt drums, and the plurality of tilt drums are rotated by rotation of the driving shaft to thereby enable adjustment of an angle of the vane supported by the direction control cord,

a plurality of delay units provided on the drive shaft in parallel with the plurality of winding shafts, respectively, for causing the winding shafts to rotate in conjunction with the rotation of the inclined drum by a predetermined delay amount;

an opening with a first length is formed on the top surface of an upper beam for containing the winding shaft and the inclined roller along the front-back direction, and a containing space with a second length is arranged in the upper beam, wherein the second length is larger than the first length;

the plurality of delay units respectively have the following shapes: a shape that is inserted from a top surface of the upper frame, in which the opening of the first length is formed, when the upper frame is assembled into the upper frame, and when the delay unit is rotated so as to be opposed to the plurality of winding shafts to be connected on the drive shaft in a direction in which the plurality of winding shafts are arranged side by side, the plurality of delay units are restrained from being displaced in the front-rear direction and the vertical direction with respect to the upper frame by a housing space of the second length in the upper frame; and the number of the first and second electrodes,

the delay unit is provided with an input shaft component, an output shaft component, a brake component and a shell component;

said input shaft member being directly connected to said drive shaft;

the output shaft member has an output shaft portion that rotates in conjunction with the rotation of the input shaft member by the predetermined delay amount to transmit the rotation, and the output shaft member engages with the input shaft member with a play of a predetermined rotation angle;

the brake member suppresses rotation of the output shaft member other than the rotation transmitted from the input shaft member;

the housing member houses the input shaft member, the output shaft member, and the brake member.

25. A horizontal blind in which a plurality of winding shafts constituting a cord winding device wind or unwind a lifting cord in accordance with rotation of one driving shaft to thereby enable lifting and lowering operation of a vane, and a direction control cord is suspended from a plurality of tilt drums, and the plurality of tilt drums are rotated by rotation of the driving shaft to thereby enable adjustment of an angle of the vane supported by the direction control cord,

a plurality of delay units provided on the drive shaft in parallel with the plurality of winding shafts, respectively, for causing the winding shafts to rotate in conjunction with the rotation of the inclined drum by a predetermined delay amount;

each of the plurality of delay units is configured to: when the elevator is assembled in an upper beam housing the winding shaft and the tilt drum, after the driving shaft is simply inserted into the shaft centers of the plurality of delay units, the plurality of winding shafts, and the plurality of tilt drums, the state of the plurality of delay units can be initialized by simply rotating the driving shaft more than a predetermined number of turns, and the alignment of the installation and fixing positions of the lifting rope on all the winding shafts can be realized, and when the plurality of delay units are separated from the plurality of winding shafts, the delay units and the winding shafts can be connected with each other and arranged side by sliding the delay units in the left-right direction in the upper beam after the alignment; and the number of the first and second electrodes,

the delay unit is provided with an input shaft component, an output shaft component, a brake component and a shell component;

said input shaft member being directly connected to said drive shaft;

the output shaft member has an output shaft portion that rotates in conjunction with the rotation of the input shaft member by the predetermined delay amount to transmit the rotation, and the output shaft member engages with the input shaft member with a play of a predetermined rotation angle;

the brake member suppresses rotation of the output shaft member other than the rotation transmitted from the input shaft member;

the housing member houses the input shaft member, the output shaft member, and the brake member.

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