JP6796396B2 - Obstacle detection stop device and horizontal blinds - Google Patents

Description

The present invention relates to an obstacle detection / stopping device for a horizontal blind, and a horizontal blind having an obstacle detection / stopping device capable of raising / lowering and tilting a slat with one drive shaft.

The horizontal blind can adjust the amount of solar radiation taken into the room by raising and lowering and tilting the multi-stage slats supported by the ladder cord suspended from the head box using the elevating cord. ..

For example, a bottom rail is arranged at the lower end of the ladder cord, and the elevating cord attached to the bottom rail is pulled into the head box and pulled out from the head box to raise and lower the bottom rail in multiple stages. The slats can be raised and lowered.

By the way, as one type of horizontal blind, a tilt drum that suspends and supports the ladder cord with one drive shaft and a cord that enables the rotation of the winding shaft that suspends and supports the elevating cord so that it can be wound or rewound. Those using a support member are generally known.

With a general cord support member that allows the rotation of the tilt drum and winding shaft to be operated with one drive shaft, even if a tilt operation without raising and lowering the slats is desired, the bottom rail will fluctuate in the vertical position due to the tilt operation. Will end up.

On the other hand, some cord support members in the horizontal blind are provided with an obstacle detection / stopping device. The obstacle detection / stopping device is a device for preventing the rotation of the take-up shaft supporting the elevating cord when tension in the pulling direction does not act on the elevating cord, and the bottom rail becomes an obstacle while the slats are descending. In the event of a collision, it has the function of stopping the unwinding of the elevating cord, stopping the descent of the slats and bottom rail, and preventing the reverse winding of the elevating cord.

As one type of such an obstacle detection / stopping device, a cam member that can move relative to the elevating drum in the axial direction is provided, and the cam member reaches a position where the elevating drum cannot rotate when the tension of the elevating cord is lost. Some cam members are relatively moved, and when the tension of the lifting cord is restored, the lifting drum is relatively moved in the opposite direction to a position where the lifting drum can be rotated (see, for example, Patent Document 1).

More specifically, in the technique of Patent Document 1, in the horizontal blind, the drive required from the rewinding amount of the elevating cord at the lower limit position determined by the rudder cord to at least the slats from the fully closed state to the reverse fully closed state. The rotation angle of the shaft is configured to idle so as not to move the cam member to a position where the winding shaft cannot rotate.

The obstacle detection / stopping device for this configuration is designed to idle the cam member so as not to move the cam member to a position where the elevating drum cannot rotate by the rotation angle when adjusting the slat angle.

Japanese Unexamined Patent Publication No. 2005-179994

As described above, in a general cord support member that enables the rotation of the tilt drum and the take-up shaft to be operated by one drive shaft, even if a tilt operation without raising and lowering the slats is desired, the tilt operation causes the bottom rail. Causes the problem of moving up and down.

On the other hand, as disclosed in Patent Document 1, the amount of lifting cord rewinding at the lower limit position determined by the ladder code when obstacle detection is stopped, such as when the bottom rail is at the lower limit position by the obstacle detection stop device. At least the rotation angle of the drive shaft required from the fully closed state to the reverse fully closed state of the slats is configured to idle so as not to move the cam member to a position where the take-up shaft cannot rotate. is there.

However, in this technique, since the rotation angle required for idling differs depending on the horizontal blind to be applied, it is necessary to prepare an obstacle detection / stopping device suitable for the rotation angle required for angle adjustment.

In addition, in the horizontal blind equipped with the obstacle detection stop device in these techniques, the obstacle stop device operates after the bottom rail hits the obstacle because it will idle by the rotation angle when adjusting the slat angle. There was an adverse effect that the time to do it was delayed.

Therefore, there is a problem that the tilt drum of the slat and the take-up shaft can be rotated by one drive shaft, and the bottom rail is moved up and down by the tilt operation when a tilt operation without raising and lowering the slat is desired. It is desired to have a technique that solves the problem, enhances the versatility of the obstacle detection / stopping device, and has excellent responsiveness.

In view of the above problems, an object of the present invention is to provide an obstacle detection / stopping device for a horizontal blind, which is a highly versatile aspect, and an obstacle detection / stopping device thereof, and the slats do not move up and down in one drive shaft. The purpose is to provide a horizontal blind that enables tilt operation.

The obstacle detection / stopping device of the present invention is a horizontal blind capable of raising / lowering and tilting the slat with one drive shaft, and when tension in the pulling direction does not act on the raising / lowering cord used for raising / lowering the slat, the above-mentioned An obstacle detection / stopping device that prevents the rotation of the take-up shaft that supports the elevating cord, and tilts the slats in a predetermined direction with respect to a tilt drum that adjusts the angle of the slats via the rudder cord. When the slats are inverted after this, the rotation of the drive shaft is transmitted to the tilt drum, and the rotation of the take-up shaft during the angle adjustment of the slats is prevented, so that the drive shaft and the take-up shaft come together. A cam shaft that is connected to the output shaft of the delay unit that delays the interlocking rotation after a predetermined relative rotation, and the take-up shaft that cannot rotate when the cam shaft and the take-up shaft rotate relative to each other. It is provided with a cam clutch that moves relative to the position where the take-up shaft is made to be non-rotatable, and the delay unit can adjust the time when the take-up shaft is operated to prevent the rotation of the take-up shaft. It is a feature.

Further, in the obstacle detection / stopping device of the present invention, the cam shaft is connected to a cap that is non-rotatably attached to the take-up shaft, and the cam clutch is attached according to the rotation direction of the cam shaft. It is characterized in that it is configured to be movable relative to the winding shaft in the axial direction.

Further, in the obstacle detection / stopping device of the present invention, the camshaft has two or more protrusions provided with respect to the cap in the rotation direction when the camshaft prevents the rotation of the winding shaft. It is characterized in that it is configured to be brought into contact with each other.

Further, in the obstacle detection / stopping device of the present invention, the cam clutch is configured to engage with the take-up shaft so as to move relative to the axial direction with the rotation of the take-up shaft. It is characterized by.

Further, the horizontal blind of the present invention is characterized by including the obstacle detection / stopping device of the present invention and the delay unit.

Further, in the horizontal blind of the present invention, the delay unit rotates and transmits the input shaft member directly connected to the drive shaft and the rotation of the input shaft member so as to interlock and rotate with the predetermined delay amount. An output shaft member having a portion and engaging with the input shaft member with a play of a predetermined rotation angle, and a braking member that suppresses rotation of the output shaft member other than rotation due to rotation transmission from the input shaft member. It is characterized by including the input shaft member, the output shaft member, and a case member accommodating the braking member.

Further, in the horizontal blind of the present invention, the braking member has a coil shape having a pair of ends that engage with a part of the output shaft member while allowing rotation transmission from the input shaft member to the output shaft member. The brake spring is provided with a spring case for accommodating the brake spring with a reduced diameter and being locked to a case member of the delay unit.

Further, in the horizontal blind of the present invention, a rotary relay plate for rotating and relaying with a predetermined delay amount is further provided between the input shaft member and the output shaft member, and the input shaft member and the output shaft member are engaged with each other. The feature is that the amount of delay due to the combination can be changed.

Further, the horizontal blind of the present invention is characterized in that the amount of rotation delayed by the delay unit is set to be equal to or greater than the angle adjustment range of the slats.

Further, in the horizontal blind of the present invention, the support case for supporting the obstacle detection / stopping device is provided with a restraint wall for restraining the upward movement of the cam shaft.

Further, another aspect of the horizontal blind according to the present invention is a horizontal blind having an obstacle detection / stopping device capable of raising / lowering and tilting the slat with one drive shaft, and is pulled out by an elevating cord used for the raising / lowering operation of the slat. The slats are specified for an obstacle detection / stopping device that blocks the rotation of the take-up shaft that supports the elevating cord when tension in the direction does not act, and a tilt drum that adjusts the angle of the slats via the ladder cord. When the slats are inverted after being tilted in a direction and raised and lowered, the rotation of the drive shaft is transmitted to the tilt drum, and the rotation of the take-up shaft during the angle adjustment of the slats is prevented to prevent the drive shaft. A delay unit that delays the winding shaft and the winding shaft so that they rotate in conjunction with each other after a predetermined relative rotation, and the obstacle detection / stopping device includes a cam shaft that is non-rotatably connected to the output shaft of the delay unit. , A cam clutch that moves relative to a position that makes the take-up shaft non-rotatable when the cam shaft and the take-up shaft rotate relative to each other and makes the take-up shaft non-rotatable, and cannot rotate relative to the take-up shaft. The cam shaft is brought into contact with the cap by two or more protrusions provided with each other in the rotation direction when the rotation of the take-up shaft is prevented. It is characterized in that it is configured as follows.

Further, the horizontal blind according to the present invention is a horizontal blind having an obstacle detection / stopping device capable of raising / lowering and tilting the slat with one drive shaft, and is used as an elevating cord used for raising / lowering the slat. When the tension in the pull-out direction does not act, the obstacle detection stop device that prevents the rotation of the take-up shaft that supports the elevating cord and the rotation amount that prevents the rotation of the take-up shaft by the obstacle detection stop device are predetermined. The obstacle detection / stopping device includes a camshaft that is non-rotatably connected to the output shaft of the delay unit, and the camshaft and the take-up, which are provided with an operation amount adjusting member that can be adjusted by the rotation amount of the above. A cam clutch that moves relative to a position that makes the take-up shaft non-rotatable during relative rotation with the shaft to make the take-up shaft non-rotatable, and a cap that is attached to the take-up shaft so that it cannot rotate relative to the take-up shaft. The camshaft is configured to be brought into contact with the cap by two or more protrusions provided with each other in the rotation direction when the rotation of the winding shaft is prevented, and the operating amount is adjusted. The member is characterized in that it is non-rotatably connected to the drive shaft.

According to the present invention, the rotation of the tilt drum and the take-up shaft can be operated by one drive shaft, and when a tilt operation without raising and lowering the slats is desired, the bottom rail moves up and down by the tilt operation. The problem can be solved, and in particular, the versatility of the obstacle detection / stopping device is enhanced, and the responsiveness is excellent.

It is a front view which shows the schematic structure of the horizontal blind of one Embodiment by this invention. (A) and (b) are perspective views and cross-sectional views showing a schematic configuration of a cord support device having a delay unit of the first embodiment according to the obstacle detection / stopping device of one embodiment according to the present invention, respectively. It is an exploded perspective view which shows the schematic structure of the delay unit of Example 1 which concerns on the obstacle detection stop apparatus of one Embodiment by this invention. It is a perspective view explaining the assembling method of the cord support device which has the delay unit of Example 1 which concerns on the obstacle detection stop device of one Embodiment by this invention. (A), (b), and (c) are diagrams for explaining the operation of the delay unit of the first embodiment according to the obstacle detection / stopping device of one embodiment according to the present invention, respectively. (A), (b), and (c) are schematic side views for explaining the operation of the horizontal blind when the bottom rail according to the obstacle detection / stopping device according to the present invention is in the non-lower limit position, respectively. Is. It is an exploded perspective view which showed the schematic structure of the obstacle detection stop device of one Embodiment by this invention, and was seen from one direction. It is an exploded perspective view which showed the schematic structure of the obstacle detection stop device of one Embodiment by this invention, and was seen from another direction. (A) and (b) are diagrams showing the operation of one of the obstacle detection / stopping devices according to the present invention, respectively. (A) and (b) are diagrams showing the operation of the obstacle detection / stopping device according to the present invention in the other operating direction. (A) to (e) are diagrams showing the operation before and after the operation of the obstacle detection / stopping device according to the embodiment of the present invention, respectively. (A), (b), and (c) are schematic side views for explaining the operation of the horizontal blind when the bottom rail according to the obstacle detection / stopping device according to the present invention is in the lower limit position, respectively. is there. (A) and (b) are perspective views and cross-sectional views showing a schematic configuration of a cord support device of another example having a delay unit of the first embodiment according to the obstacle detection / stopping device of one embodiment according to the present invention, respectively. .. It is an exploded perspective view which shows the schematic structure of the delay unit of Example 2 which concerns on the obstacle detection stop device of one Embodiment by this invention. It is a perspective view explaining the assembling method of the cord support device of another example which has the delay unit of Example 2 which concerns on the obstacle detection stop device of one Embodiment by this invention. It is an exploded perspective view which shows the schematic structure of the delay unit of Example 3 which concerns on the obstacle detection stop device of one Embodiment by this invention. It is an exploded perspective view which shows the schematic structure of the delay unit of Example 4 which concerns on the obstacle detection stop apparatus of one Embodiment by this invention. (A) and (b) are the operations related to the delay unit of the third embodiment according to the obstacle detection / stopping device of one embodiment according to the present invention, respectively, and (c) is the obstacle detection / stopping device of one embodiment according to the present invention. It is a figure explaining the operation about the delay unit of the said Example 4. FIG. (A) and (b) are perspective views which show an example of the connection structure with respect to the obstacle detection stop device in the cord support device about the delay unit of one Example according to this invention, respectively. It is an exploded perspective view which shows the schematic structure of the delay unit of Example 5 by this invention. It is a perspective view explaining the method of assembling the cord support device of the modification which has the delay unit of Example 5 by this invention. It is a perspective view which shows the schematic structure of the cord support device of the modification which has the delay unit of Example 5 by this invention. It is an exploded perspective view about the working amount adjusting member of one Example which concerns on the obstacle detection stop device of one Embodiment by this invention. (A) and (b) are diagrams showing the operation relation of the operation amount adjusting member of one Example which concerns on the obstacle detection stop device of one Embodiment by this invention, respectively.

Hereinafter, with reference to the drawings, a horizontal blind that enables the slat to be lifted and lowered by the lifting cord and the slat to be tilted by the ladder cord by rotating one drive shaft will be described as an example. In the specification of the present application, 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 upward (or upper) and lower (or lower), respectively, according to the hanging direction of the slats. It is defined that the left direction in the figure is the left side of the horizontal blind and the right direction in the figure is the right side of the horizontal blind. Further, when the side where the front view of FIG. 1 is visually recognized is the front side (indoor side) and the opposite side is the rear side (or the outdoor side) and is referred to as the front-rear direction of the horizontal blind, it is shown in the front view of FIG. The direction perpendicular to the surface.

(Structure of horizontal blinds)
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 the delay unit 5a according to the present invention in parallel with the cord support unit 5b is provided in the head box 1, and a ladder is provided on the right end side in the head box 1. A cord support member 6 is arranged. In the illustrated example, only one cord support device 5 and one ladder cord support member 6 are shown, but two or more cord support devices 5 and a ladder cord support member 6 can be provided in the head box 1, respectively. ..

The cord support unit 5b and the ladder cord support member 6 suspend and support a plurality of stages of slats 4 via a pair of string-shaped ladder cords 9 hanging on the indoor side and the outdoor side, respectively, and the respective ladder cords 9 The bottom rail 8 is suspended and supported at the lower end of the. The head box 1 is fixed to the mounting surface on the ceiling side via the bracket 7.

Further, a string-shaped elevating cord 10 is hung from the cord support unit 5b at a substantially central portion in the front-rear direction on the lower surface of the head box 1, and a lower end of the elevating cord 10 is provided at a substantially central portion in the front-rear direction of each slat 4. It is attached to the bottom rail 8 through an insertion hole (not shown).

Therefore, the cord support unit 5b can wind or rewind the tilt drum 51 having a V-shaped groove for hanging a pair of ladder cords 9 hanging on the indoor side and the outdoor side, respectively, and the elevating cord 10. A long tubular winding shaft 52 having an inclination is arranged side by side on a square rod-shaped drive shaft 11 and supported on a support case 50.

Although details will be described later, the obstacle detection / stopping device 53 of the embodiment according to the present invention is provided on the tip end side of the take-up shaft 52. The obstacle detection / stopping device 53 is a device for blocking the rotation of the take-up shaft 52 that supports the elevating cord 10 when the tension in the pulling direction does not act on the elevating cord 10, and is a device for preventing the rotation of the take-up shaft 52 that supports the elevating cord 10 When the 8 collides with an obstacle, it has a function of stopping the rewinding of the elevating cord 10 to stop the descent of the slats 4 and the bottom rail 8 and preventing the reverse winding of the elevating cord 10.

In particular, although details will be described later, in the first embodiment according to the obstacle detection / stopping device 53 of the present embodiment, the cord support device 5 is connected to the tilt drum 51 so as not to rotate relative to the drive shaft 11. , The cord support unit 5b in which the take-up shaft 52 is not connected (non-engaged) to the drive shaft 11 and is supported by the support case 50, and the take-up shaft 52 is predetermined with respect to the rotation of the tilt drum 51. A delay unit 5a that is operated so as to rotate in conjunction with a delay amount is arranged side by side on the drive shaft 11 with respect to the cord support unit 5b.

The ladder cord support member 6 is simply a device that supports a tilt drum 51a having a V-shaped groove for hanging a pair of ladder cords 9 hanging on the indoor side and the outdoor side, respectively.

An operation unit 2 is provided on the right end side of the head box 1. The operation unit 2 has a pulley (not shown) on which an endless string-shaped operation cord 3 (or an endless ball chain may be used) can be hooked if it is a manual type shown, and is outside the head box 1. The operation code 3 is derived toward the direction, and the drive shaft 11 can be rotated.

Alternatively, when the operation unit 2 is electric, it can be an electric motor that can rotate the drive shaft 11 based on an operation signal from the outside. Therefore, the form of the operation unit 2 can be any form as long as it can transmit to the rotation of the drive shaft 11 according to the operation by the operator.

Therefore, in the horizontal blind shown in FIG. 1, the operation cord 3 is operated to rotate the drive shaft 11, and the tilt drum 51 in the cord support device 5 and the tilt in the ladder cord support member 6 are tilted with the rotation of the drive shaft 11. By rotating the drum 51a, a tilt operation for adjusting the angle of the slats 4 is possible. When the drive shaft 11 is rotated beyond the rotation required for the tilt operation, the take-up shaft 52 in the cord support device 5 is delayed from the rotation of the tilt drum 51 during the tilt operation by the action of the delay unit 5a. The slat 4 can be raised or lowered by interlocking rotation. In particular, in a highly versatile manner, an obstacle detection / stopping device 53 with a delay unit 5a that enables a tilt operation of the slats 4 without raising / lowering with one drive shaft 11 is configured.

Hereinafter, more specifically, the structure / operation of the delay unit 5a according to the obstacle detection / stopping device 53 of the present embodiment and the structure / operation of the obstacle detection / stopping device 53 of the present embodiment will be described in detail. explain.

(Example 1)
2 (a) and 2 (b) are perspective views and cross-sectional views showing a schematic configuration of a cord support device 5 having a delay unit 5a of the first embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention, respectively. Is. FIG. 3 is an exploded perspective view showing a schematic configuration of the delay unit 5a of the first embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention. Further, FIG. 4 is a perspective view illustrating a method of assembling the cord support device 5 having the delay unit 5a of the first embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention.

The cord support device 5 shown in FIG. 2A is configured by arranging the delay unit 5a in parallel with the cord support unit 5b. The cord support unit 5b rotatably supports the tilt drum 51 and the take-up shaft 52 with the drive shaft 11 as the rotation shaft by the support case 50. A ladder cord 9 (see FIG. 1) hanging from the tilt drum 51 and an elevating cord 10 (see FIG. 1) hanging from the take-up shaft 52 are provided on the bottom surface of the support case 50. It is derived from the outlet 50a.

As shown in FIG. 2B, the tilt drum 51 is non-rotatably connected to the drive shaft 11 and is supported by the support case 50. On the other hand, the take-up shaft 52 is supported by the support case 50 as unconnected (non-engaged) with respect to the drive shaft 11. Further, an obstacle detection / stopping device 53 is provided on the tip end side of the take-up shaft 52 to prevent the take-up shaft 52 supporting the elevating cord 10 from rotating when tension in the pulling direction does not act on the elevating cord 10. However, the obstacle detection / stopping device 53 is also supported by the support case 50 as a non-connection (non-engagement) with respect to the drive shaft 11. The case body of the obstacle detection / stopping device 53 is fixed to the tip end side of the take-up shaft 52, but the tubular cam shaft 531 housed in the case body of the obstacle detection / stopping device 53 is being lowered by the slats 4. When the bottom rail 8 collides with an obstacle, the play required to stop the rewinding of the elevating cord 10 and stop the descent of the slat 4 and the bottom rail 8 (that is, the amount of rotation that prevents the rotation of the take-up shaft 52 described later). It has θ) and can rotate integrally with the rotation of the take-up shaft 52.

As shown in FIG. 3, the delay unit 5a juxtaposed with the support case 50 of the cord support unit 5b includes an output shaft member 56, a brake spring 57, a spring case 58, a rotary relay plate 59, and an input shaft member. It is composed of 60 and case members 55a and 55b.

The output shaft member 56 projects through an outer hexagonal cylindrical shaft portion 561 and a flange 567 on which a cylindrical shaft portion 568 is formed on the base end side (drive transmission input side) of the shaft portion 561. It has a substantially cylindrical cylindrical shaft 562, and a protrusion 564 projecting from the center of the shaft to the drive transmission input side within a predetermined angle (angle α1 described later) is provided on the outer periphery of a part of the cylindrical shaft 562. ing. The shaft portion 568 and the flange 567 of the output shaft member 56 are relatively rotatably supported by the circular opening 559c and the opening side surface 559a on one side surface (drive transmission output side) of the case members 55a and 55b, respectively. In this example, the cylindrical shaft 562 and the protrusion 564 are formed so as to protrude in a continuous shape, but the cylindrical shaft 562 and the protrusion 564 may be formed to protrude individually. A recessed region on the outer circumference of the cylindrical shaft 562 excluding the protrusion 564 is formed as an engagement receiving portion 563 that is a range of motion of the protrusion 592 of the rotary relay plate 59 described later. The shaft portion 561 and the cylindrical shaft 562 are formed with a shaft hole 565 through which the drive shaft 11 can be inserted without engagement. The outer hexagonal tubular shaft portion 561 can be integrally rotatably engaged with the tubular cam shaft 531 having the hexagonal shaft hole 531a of the obstacle detection / stopping device 53 (FIG. 4). (See), the rotation of the output shaft member 56 can be transmitted so as to rotate in synchronization with the cam shaft 531 of the obstacle detection / stopping device 53 (see FIG. 2B).

The brake spring 57 and the spring case 58 function as braking members that suppress rotation of the output shaft member 56 other than rotation due to rotation transmission from the input shaft member 60. More specifically, a predetermined braking force is operated with respect to the rotation of the output shaft member 56 transmitted from the cam shaft 531 of the obstacle detection / stopping device 53. That is, the braking member including the brake spring 57 and the spring case 58 functions as a stopper device that locks the rotation of the drive shaft 11 so as to prevent the weight of the slat 4 and the bottom rail 8 from dropping.

In order to maintain the elevating position of the slat 4 in a stable manner, the pair of end portions 571 of the coiled brake spring 57 is provided with an output shaft so that the take-up shaft 52 is not idle except during the elevating operation. It is fitted so as to engage with both side surfaces of the protrusion 564 of the member 56. Further, the spring case 58 accommodates the coiled brake spring 57 in a reduced diameter state, whereby the brake spring 57 can rotate relative to the spring case 58 by constantly pressing the inner peripheral surface of the spring case 58. However, the predetermined braking force is activated. On the other hand, in the spring case 58, a pair of recesses 582 provided in a part thereof are non-rotatably locked by convex portions 557 provided in each of the case members 55a and 55b to accommodate the case members 55a and 55b, respectively. Since it is fitted to the portion 556, the spring case 58 is fixed so as not to rotate.

The rotary relay plate 59 is composed of a substantially cylindrical member having an outer diameter substantially the same as the diameter of the brake spring 57 housed in the spring case 58 with a reduced diameter, and has substantially the same diameter as the shaft hole 565 of the output shaft member 56. A shaft hole 591 is formed. Therefore, the shaft hole 591 can be inserted through the drive shaft 11 without engagement. The rotary relay plate 59 is generally composed of a cylindrical member, but more specifically, on the tip surface of the rotary relay plate 59, a predetermined angle from the axis center thereof (angle α2 described later) at a position near the peripheral edge thereof. A protruding piece 592 that protrudes in the range of is provided. The tip surface of the rotary relay plate 59 is arranged so as to be in contact with the base end surface of the output shaft member 56 via the inside of the brake spring 57 (see FIG. 2B), and the rotary relay plate 59 is a case member. It is housed in each of the housing portions 555 of 55a and 55b so as to be relatively rotatable. Therefore, the protrusion 592 on the tip end surface side of the rotation relay plate 59 can be relatively rotated as long as it is within the range of the engagement receiving portion 563 of the recessed region excluding the protrusion 564 in the output shaft member 56, that is, the rotation relay. Even if the plate 59 rotates, the rotation is not transmitted to the output shaft member 56 until the protrusion 592 comes into contact with the protrusion 564 of the output shaft member 56 via the end portion 571 of the brake spring 57. After the contact, the rotation of the rotation relay plate 59 is rotationally transmitted to the output shaft member 56.

Further, on the base end surface of the rotation relay plate 59, a groove-shaped engagement receiving portion 593 is formed around the shaft hole 591 except for a part of the rotation receiving portion 594. The rotation receiving portion 594 is formed within a range of a predetermined angle (an angle α3 described later) from the axis center of the shaft hole 591. In this example, the groove-shaped engaging receiving portion 593 is used to form the rotating receiving portion 594, but it does not have to be groove-shaped as long as it has the same function.

The input shaft member 60 has a tubular shaft portion 601 having a substantially square hole-shaped shaft hole 602 directly connected to the drive shaft 11, and a range of a predetermined angle (angle α4 described later) from the shaft center of the shaft portion 601. A protrusion 603 projecting alongside the shaft portion 601 is formed via a flange 604 on which the tubular shaft portion 606 is formed. With the drive transmission output side surface of the flange 604 of the input shaft member 60 arranged so as to be in contact with the drive transmission input side surface of the rotary relay plate 59 (see FIG. 2B), the shaft portion 606 of the input shaft member 60 and the shaft portion 606 The flange 604 is relatively rotatably supported by a circular opening 559d and a housing portion 555 at the ends of the case members 55a and 55b on the drive transmission input side, respectively. Further, the shaft portion 601 can support the shaft hole 565 of the output shaft member 56 and the shaft hole 591 of the rotary relay plate 59.

Therefore, the protrusion 603 of the input shaft member 60 can be relatively rotated as long as it is within the range of the engaging receiving portion 593 of the rotation relay plate 59, that is, the input shaft member 60 directly connected to the drive shaft 11 rotates. Even so, the rotation is not transmitted to the rotation relay plate 59 until the protrusion piece 603 comes into contact with the rotation receiving portion 594 of the rotation relay plate 59, but after the contact, the rotation of the input shaft member 60 does not occur. The rotation is transmitted to the rotation relay plate 59.

Therefore, in the delay unit 5a of the first embodiment, the delay amount between the input shaft member 60 and the rotation relay plate 59 and the rotation relay plate 59 before the rotation of the input shaft member 60 is rotationally transmitted to the output shaft member 56. The delay amount, which is the sum of the delay amounts between the output shaft member 56 and the output shaft member 56, is used.

For example, as shown in FIG. 5A, the delay amount between the rotary relay plate 59 and the output shaft member 56 is the protrusion 564 protruding in the range of the angle α1 and the protrusion 592 protruding in the range of the angle α2. The delay amount is β between and. For example, if α1 ≈ 60 degrees and α2 ≈ 90 degrees, the delay amount β ≈ 210 degrees. Further, as shown in FIG. 5B, the delay amount between the input shaft member 60 and the rotation relay plate 59 is the rotation receiving portion 594 in the range of the angle α3 and the protrusion 603 protruding in the range of the angle α4. The delay amount is γ. For example, if α3 ≈ 60 degrees and α4 ≈ 60 degrees, the delay 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, various delay amounts can be realized by setting the rotation amount delayed by the delay unit 5a to be equal to or greater than the angle adjustment range of the slat 4, and the rotation relay plate 59 rotates and relays with a predetermined delay amount. Functions as a delay adjusting member.

Among the constituent members of the delay unit 5a of the first embodiment, the input shaft member 60 is the only member that rotates directly connected to the drive shaft 11, and the delay unit 5a of the first embodiment is arranged side by side on the drive shaft 11. By simply doing so, it is possible to perform interlocking rotation with a predetermined delay amount relative to the rotation of the tilt drum 51 with respect to the rotation of the take-up shaft 52 via the obstacle detection / stopping device 53 (FIGS. 4 and 2 (b)). reference).

In particular, as shown in FIG. 4, the case portions 55a and 55b of the delay unit 5a of the first embodiment are driven by a claw portion 558 that grips the protrusion 50b provided on the support case 50 of the cord support unit 5b. It is formed on each side wall on the transmission output side. As a result, the delay unit 5a of the first embodiment can be stably assembled on the drive shaft 11 in such a manner that it can be easily attached to and detached from the cord support unit 5b. The shaft portion 561 of the output shaft member 56 in the delay unit 5a is engaged with the shaft hole 531a of the camshaft 531 of the obstacle detection stop device 53 and is integrally rotatable, but the obstacle detection stop device When an excessive load is applied to the rotation of the drive shaft 11 even though the 53 is operating, an undesired force that causes the obstacle detection / stopping device 53 to come off the support case 50 acts to separate the connected state. An undesired force also acts in the direction, which can cause a failure. Therefore, in order to alleviate the undesired force that separates the connected state due to such an overload, as shown in FIG. 4, the support case 50 has a restraint wall 50j that suppresses the upward movement of the camshaft 531. It is preferable to provide.

Although will be described later as the second embodiment, the rotation relay plate 59 is omitted, the input shaft member 60 is directly connected to the output shaft member 56, and the delay amount between the input shaft member 60 and the output shaft member 56 is determined. It can be configured to work, and the same output shaft member 56, brake spring 57, spring case 58, and input shaft member 60 can be shared to generate different delay amounts.

For example, as shown in FIG. 5C, the amount of delay between the input shaft member 60 and the output shaft member 56 when the rotary relay plate 59 is not used is an angle with the protrusion 564 protruding within the range of the angle α1. The delay amount η is obtained between the protrusion piece 603 and the protrusion piece 603 that protrudes in the range of α4. For example, if α1 ≈ 60 degrees and α4 ≈ 60 degrees, the delay amount η ≈ 240 degrees. Therefore, various delay amounts can be realized by setting the rotation amount delayed by the delay unit 5a to be equal to or greater than the angle adjustment range of the slat 4.

Further, the rotary relay plate 59 can be changed by preparing a rotary relay plate 59 that changes the shape of the protrusion 592 (angle α2) or the shape of the rotary receiving portion 594 (angle α3) to generate a plurality of types of delay amounts. It is also possible to realize many kinds of delay amounts only by itself.

The case members 55a and 55b fit the output shaft member 56, the brake spring 57, the spring case 58, the rotary relay plate 59, and the input shaft member 60 in the direction perpendicular to the drive shaft 11 (in this example, the front-rear direction). It is designed to form and contain. More specifically, fitting receiving portions 551 having protrusions 553 are formed on the upper surface and the lower surface of the case member 55a, respectively, and holes that can be fitted with the protrusions 553 are formed on the upper surface and the lower surface of the case member 55b, respectively. A fitting piece 552 having 554 and engaging with the fitting receiving portion 551 is formed. That is, when the two case members are fitted together to form one case, if the fitting is formed in the direction parallel to the drive shaft 11, the fitting force is weakened by the rotation of the drive shaft 11, and there is a quality problem. Since it can occur, it is necessary to form a coalescence using a screw or the like. However, by forming the fitting in the direction perpendicular to the drive shaft 11 as in this embodiment, the fitting is strong against the rotation of the drive shaft 11. Since it has a resultant force, it is not necessary to form a coalescence of screws and the like, which comprehensively contributes to facilitation of assembling and cost reduction.

Further, in this embodiment, an example in which the shaft portion 561 of the output shaft member 56 and the cam shaft 531 of the obstacle detection / stopping device 53 are engaged with each other in a hexagonal shape has been described, but there are more from the viewpoint of improving the assembling property. It is preferable to have an engaging shape consisting of sides. That is, by configuring the shaft portion 561 of the output shaft member 56 to have a polygonal shape and configuring the cam shaft 531 of the obstacle detection / stopping device 53 so as to engage with the shaft portion 561, it can be assembled with a slight rotation operation. , Its assemblability is improved.

Then, in the case of the horizontal blind shown in FIG. 1 to which the cord support device 5 having the delay unit 5a of the first embodiment is applied, the rotation of the tilt drum 51 and the take-up shaft 52 can be operated by one drive shaft 11. However, if a tilt operation without raising and lowering the slat 4 is desired, the bottom rail 8 does not move up and down by the tilt operation. Further, when the bottom rail 8 is not in the lower limit position, the operability of tilting after the folded portion of the slat 4 is raised during the tilt operation is not impaired.

For example, when a predetermined number of slat 4s in a horizontal state as a stationary state shown in FIG. 6A are folded into a predetermined number of bottom rails 8, the angle of the slat 4 is adjusted by a tilt operation as shown in FIG. 6B. Even so, the bottom rail 8 does not move up and down. Further, as shown in FIG. 6C, the operability of tilting after the folded portion of the slat 4 is raised during the tilt operation is not impaired.

Further, as shown in FIG. 3, the case members 55a and 55b are formed with an upper corner portion 550a having a dent in a square shape. Therefore, when the delay unit 5a is installed in the head box 1, the upper corner portion 550a of the delay unit 5a supported by the lower corner portion 550b engages with the upper end of the head box 1 (see FIG. 6). It is possible to suppress rattling in the front-back direction and the up-down direction. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, rattling in the left-right direction can be suppressed by grasping the case members 50b of the support case 50 in the cord support unit 5b. Will be done.

(Configuration of obstacle detection / stopping device)
Next, the obstacle detection / stopping device 53 of the embodiment according to the present invention will be described in detail. 7 and 8 are exploded perspective views showing a schematic configuration of an obstacle detection / stopping device 53 according to an embodiment of the present invention, as viewed from different directions. 9 (a) and 9 (b), and 10 (a) and 10 (b) are diagrams showing the operation in each operating direction showing the schematic configuration of the obstacle detection / stopping device 53 of the present embodiment. ..

First, referring to FIGS. 7 and 8, the obstacle detection / stopping device 53 includes a cam shaft 531, a cam clutch 532, and a cap 533.

The cam shaft 531 is formed of three-stage tubular portions 5310, 5311, and 5312, which are connected by steps with different diameters in the radial direction from the drive transmission input side to the drive transmission output side. The tubular portion 5310 is formed with a shaft hole 531a that is connected to the shaft portion 561 of the output shaft member 56 in the delay unit 5a so that it can be integrally rotated and engaged. In the illustrated example, the shaft hole 531a is a hexagonal shaft hole that can be integrally rotatably engaged with the outer hexagonal tubular shaft portion 561. Further, the drive shaft 11 can be inserted into the shaft hole 531a and the shaft hole 5313 inside the tubular portions 5311 and 5312 without engagement.

Further, a pair of protrusions 5314 are formed axially symmetrically in the stepped portion where the tubular portion 5310 and the tubular portion 5311 are connected. Further, on the tubular portion 5310 near the step portion, a sliding protrusion 5315 that projects outward at a position orthogonal to the pair of protrusions 5314 is formed. The sliding protrusion 5315 flexes on the tubular portion 5310 so as to engage with the sliding hole 5322 provided in the cam clutch 532 when the cam clutch 532 is assembled on the tubular portion 5310. It is formed on a clutch section.

Further, although a part thereof is shown in FIGS. 7 and 8, the tubular portion 5311 and the tubular portion 5312 are connected to each other on the tubular portion 5311 in the vicinity of the stepped portion, and the intervals are approximately 120 degrees from the center of the axis. The protrusions 5316 are formed at three locations. When the tubular portion 5310 of the cam shaft 531 is assembled so as to be accommodated in the cap 533, the three protruding portions 5316 are relative to each other in a predetermined angle range (angle θ shown in FIGS. 9 and 10). It is a portion that engages with the protruding wall 5332 in the cap 533 to hold it rotatably.

As shown in FIG. 8, one protruding portion 5318 is also provided on the stepped portion where the tubular portion 5311 and the tubular portion 5312 are connected, in a positional relationship relatively opposed to the position of the sliding protrusion 5315 described above. 5318 is formed so that the amount of rotation that prevents the winding shaft 52 from rotating by the obstacle detection / stopping device 53 can be adjusted by a predetermined amount of rotation by the operation amount adjusting member 54 described later. It is a part that acts, and it is not always necessary to provide it when an external delay unit 5a is used for the take-up shaft 52 as shown in FIG. 3, but as will be described later, an obstacle is detected inside the take-up shaft 52. The versatility is enhanced by making it available even when the operation amount adjusting member 54 connected to the stop device 53 is provided. Further, as shown in FIGS. 7 and 8, an engaging groove 5317 is formed in the vicinity of the end portion of the tubular portion 5312 on the drive transmission output side. The engaging groove 5317 is also described later in the embodiment. Although it is a part that acts in No. 6, it is also intended to enhance versatility.

The cam clutch 532 has a tubular shape, and its inner peripheral surface 5321 faces the tubular portion 5310 of the cam shaft 531 and is relative to each other within a predetermined angle range (angle θ shown in FIGS. 9 and 10). It can be assembled rotatably. The cam clutch 532 is provided with a sliding hole 5322 that diagonally penetrates on the peripheral surface over the predetermined angle range, and the sliding hole 5322 that diagonally penetrates on the peripheral surface is a cylinder of the cam shaft 531. It is adapted to engage with the sliding protrusion 5315 provided on the shaped portion 5310. As a result, the cam clutch 532 acts to linearly move relative to the cap 533 with the relative rotation amount of the cam clutch 532 assembled to the cam shaft 531 (details will be described later). In particular, in order to enable linear movement relative to the cap 533, the cam clutch 532 is housed in the accommodating portion 5330 of the cap 533, and the cam clutch 532 is at a position facing the sliding hole 5322 from the center of the shaft. The two guide recesses 5324 are formed so as to extend from the end on the drive transmission output side in the axial direction on the drive transmission input side, and the two guide recesses 5324 engage with the two guide protrusions 5333 on the cap 533. ..

The cam clutch 532 has a braking that protrudes outward in the axial direction from the end on the drive transmission input side at a relative position between the two guide recesses 5324 at a position facing the sliding hole 5322 from the center of the shaft. The claw 5323 is formed. The braking claw 5323 is adapted to appear outward from the cap 533 when the cam clutch 532 linearly moves in a direction relatively separated from the cap 533, and the braking claw 5323 is outward from the cap 533. When it appears, the braking claw 5323 comes into contact with the braking protrusion 50h provided in the support case 50 of the cord support unit 5b. Then, when the braking claw 5323 comes into contact with the braking protrusion 50h of the support case 50, the cam clutch 532 becomes unable to rotate relative to the support case 50, and also supports the cap 533 which is covered with the take-up shaft 52 so as to be relatively non-rotatable. Since the case 50 cannot rotate relative to the case 50 (that is, the obstacle detection operating state), the rotation of the take-up shaft 52 is restricted. On the other hand, when the cam clutch 532 moves linearly in a direction relatively close to the cap 533, the braking claw 5323 is accommodated in the cap 533. In this case, the braking claw 5323 is provided in the support case 50. It is in a non-contact state with the brake protrusion 50h. Therefore, the rotation of the take-up shaft 11 is not restricted in the state where the braking claw 5323 and the braking protrusion 50h are not in contact with each other (that is, the obstacle detection operation is released).

The cap 533 is composed of a substantially tubular member having two stages of accommodating portions 5330 and 5331 which are connected by steps with different diameters in the radial direction from the drive transmission input side to the drive transmission output side. The accommodating portion 5330 accommodates the tubular portion 5310 of the cam shaft 531 so as to be relatively rotatable in a state where the cam clutch 532 is assembled to the cam shaft 531 from the drive transmission input side. The two guide protrusions 5333 formed on the inner peripheral surface of the housing portion 5330 engage with the two guide recesses 5324 in the cam clutch 532 so as to enable the straight movement. Further, the accommodating portion 5331 accommodates the tubular portion 5312 of the cam shaft 531 so as to be relatively rotatable with a gap corresponding to the thickness of the protruding portion 5318 acting in the sixth embodiment described later.

A protruding wall 5332 that slightly protrudes in the radial direction is formed in the stepped portion where the accommodating portions 5330 and 5331 are connected, and a protruding piece 5335 that is connected to the protruding wall 5332 and slightly protrudes in the axial direction on the drive transmission input side is formed. It is formed in a ring shape. In the protruding wall 5332, the cam shaft 531 can be assembled to the cap 533 by engaging the protruding portions 5316 with the protruding wall 5332. As a result, the tubular portion 5310 of the cam shaft 531 is assembled so as to be accommodated in the cap 533, and is held so as to be relatively rotatable within a predetermined angle range (angle θ shown in FIGS. 9 and 10).

Further, a pair of protrusions 5334 that partially protrude toward the drive transmission input side are formed axially symmetrically on the protrusion 5335. One of the pair of protrusions 5334 is located between the two guide protrusions 5333. Then, the pair of protrusions 5334 can come into contact with each of the pair of protrusions 5314 of the cam shaft 531 in a state where the tubular portion 5310 of the cam shaft 531 is housed in the housing portion 5330. Therefore, the rotation of the cam shaft 531 is transmitted to the rotation of the cap 533 while maintaining the state in which each side of the pair of protrusions 5334 is in contact with each side of the pair of protrusions 5314 of the cam shaft 531. When the rotation of the cam shaft 531 turns in the opposite direction from this contact state, until each other side of the pair of protrusions 5334 comes into contact with each other side of the pair of protrusions 5314 of the cam shaft 531. , Not transmitted to the rotation of the cap 533. The delay operation at this time is made to correspond to the above-mentioned predetermined angle range (angle θ shown in FIGS. 9 and 10) relating to the relative linear motion of the cam clutch 532 with respect to the cap 533 (details will be described later).

The end of the cap 533 on the drive transmission output side is formed in a flange shape, and an index 5339 indicating the direction of the cap 533 is formed in a concave groove in a part thereof, and is used for alignment at the time of assembly. Further, as shown in FIG. 8, drive transmission is performed on the surface of the end portion of the cap 533 on the drive transmission output side so as to engage with a pair of groove portions 521 provided at the end portion of the take-up shaft 52 so as to be relatively non-rotatable. A pair of protruding pieces 5336 protruding toward the output side are formed. Further, on the surface of the end portion of the cap 533 on the drive transmission output side, a box-shaped cord attachment portion 5338 projecting to the drive transmission output side is formed in a positional relationship orthogonal to the pair of projecting pieces 5336. .. One end of the elevating cord 10 that can be wound or rewound by the take-up shaft 52 is inserted into an insertion hole 5337 provided in a part of the cord attachment portion 5338, and the cord attachment portion 5338 is inserted by a knot ball. Locked inside.

As described above, the obstacle detection / stopping device 53 in the present embodiment is connected to the cap 533 which is attached to the take-up shaft 11 so as not to rotate relative to the take-up shaft 11 and the cap 533 by the amount of rotation which prevents the take-up shaft 11 from rotating. The cam shaft 531 has a cam shaft 531 and a cam clutch 532 that can move relative to the take-up shaft 11 in the axial direction according to the rotation direction of the cam shaft 531. The cam shaft 531 rotates the take-up shaft 11. The cap 533 is configured to be brought into contact with the cap 533 by two or more protruding portions 5314 and 6334 provided with each other in the rotational direction.

(Operation of obstacle detection stop device)
The operation of the obstacle detection / stopping device 53 of the present embodiment configured as shown in FIGS. 7 and 8 will be described with reference to FIGS. 9 to 12.

First, with reference to FIGS. 9 and 10, FIGS. 9 (a) and 10 (a) are views showing the relationship between the cam shaft 531 and the cam clutch 532 and the cap 533 as viewed from the axial direction. Further, FIGS. 9 (b) and 10 (b) are mainly views showing the relationship between the cam shaft 531 and the cam clutch 532 as viewed from the front.

In FIG. 9A, when the elevating cord 10 is wound by the take-up shaft 11, each side of the pair of protrusions 5334 is in contact with each side of the pair of protrusions 5314 of the cam shaft 531. Indicates a state in which the rotation of the cam shaft 531 is transmitted to the rotation of the cap 533 while maintaining the above. In this case, the sliding protrusion 5315 of the cam shaft 531 is located near one end of the sliding hole 5322 provided in the cam clutch 532, and as shown in FIG. 9B, the cam clutch 532 It moves linearly in a direction relatively close to the cap 533, and the braking claw 5323 fits inside the cap 533. Therefore, the braking claw 5323 is in a non-contact state with the braking protrusion 50h provided on the support case 50 (in FIG. 9B, it is simply shown by a two-dot dashed line for easy understanding). .. Therefore, the rotation of the take-up shaft 11 is not restricted in the state where the braking claw 5323 and the braking protrusion 50h are not in contact with each other (that is, the obstacle detection operation is released).

Here, referring to FIG. 11, the state in which the elevating cord 10 is wound by the winding shaft 11 shown in FIGS. 9 (a) and 9 (b) is changed to the state in which the elevating cord 10 is rewound, and the slats 4 and Consider a state in which the bottom rail 8 is lowered. At this time, it is assumed that the rotation of the drive shaft 11 is transmitted to the cam shaft 531 via the delay unit 5a and the cam shaft 531 is rotating. Until the bottom rail 8 collides with an obstacle, tension in the pull-out direction is applied to the elevating cord 10 wound around the take-up shaft 11 due to the weight of the bottom rail 8 or the like, and the cam shaft 531 is wound with rotation. The camshaft 11 rotates by its own weight (see FIG. 11A). When the bottom rail 8 collides with an obstacle, the tension in the pull-out direction of the elevating cord 10 is lost, and the rotation of the take-up shaft 11 is temporarily stopped, but the cam shaft 531 maintains the rotation (FIG. 11 (b). )reference).

Then, each other side of the pair of protrusions 5334 in the cap 533 is in contact with each other side of the pair of protrusions 5314 of the cam shaft 531 (see FIG. 10A), and the take-up shaft 11 Follows the rotation of the camshaft 531 (see FIG. 11 (c)). At this time, the cam clutch 532 linearly moves in a direction relatively separated from the cap 533 and appears outward from the cap 533. Then, when the braking claw 5323 comes into contact with the braking protrusion 50h provided on the support case 50 (in FIG. 10B, it is simply shown by a two-point broken line for easy understanding), the cam clutch The 532 cannot rotate relative to the support case 50, and the cap 533, which is covered with the take-up shaft 52 so that it cannot rotate relative to the support case 50, also cannot rotate relative to the support case 50 (that is, an obstacle detection operating state). Therefore, the rotation of the take-up shaft 52 is restricted (see FIG. 11D).

In the state shown in FIG. 11D, if an excessive load is applied to the rotation of the drive 11 even though the obstacle detection / stopping device 53 is operating, the obstacle detection / stopping device 53 is disengaged from the support case 50. An undesired force that tries to act, and an undesired force also acts in the direction that separates the connected state, which may cause a failure. Therefore, in order to alleviate the undesired force that separates the connected state due to such an overload, as shown in FIG. 11E, the support case 50 suppresses the upward movement of the cam shaft 531. It is preferable to provide a restraint wall 50j.

In summary, the angle from when the bottom rail 8 collides with an obstacle to when the obstacle detection is activated is regulated to be within the angle θ at the maximum. Since the angle θ is the rotation range until each of the pair of protrusions 5334 and each of the pair of protrusions 5314 of the camshaft 531 come into contact with each other, the angle range can be adjusted by the width of these protrusions 5314 and 5334. It is possible, but it is designed so that θ ≦ 180 degrees.

For example, when the bottom rail 8 shown in FIG. 12A is stationary at the lower limit position, the angle of the slats 4 may be adjusted by a tilt operation as shown in FIG. 12B, or FIG. As shown in c), even if the angle of the slat 4 is adjusted in the opposite direction by the tilt operation, the bottom rail 8 does not move up and down. Therefore, the tilt operation does not cause a large gap at the lower end of the bottom rail 8.

In FIG. 10, the pair of protrusions 5334 and the pair of protrusions 5314 are configured so that the angle range θ ≦ 180 degrees, so that the bottom rail 8 collides with an obstacle and then the obstacle is detected. The time until the operation state is reached is shortened, and even if an excessive load is applied to the rotation of the drive 11 even though the obstacle detection / stopping device 53 is operating, the undesired force is dispersed. It is advantageous in that it can be made and is less likely to break down.

(Example 2)
Next, the cord support device 5 having the delay unit 5a of the second embodiment according to the obstacle detection / stopping device 53 of the present embodiment will be described. 13 (a) and 13 (b) are perspective views and cross-sectional views showing a schematic configuration of a cord support device 5 having a delay unit 5a according to a second embodiment of the present invention, respectively. FIG. 14 is an exploded perspective view showing a schematic configuration of the delay unit 5a of the second embodiment according to the present invention. Further, FIG. 15 is a perspective view illustrating a method of assembling the cord support device 5 having the delay unit 5a according to the second embodiment of the present invention. In the second embodiment, the same reference numbers are given to the components having the same functions as those in the first embodiment.

The cord support device 5 of the second embodiment shown in FIG. 13A is configured by arranging the delay unit 5a in parallel with the cord support unit 5b as in the first embodiment. Further, in the cord support unit 5b of the second embodiment, similarly to the first embodiment, the support case 50 rotatably supports the tilt drum 51 and the take-up shaft 52 with the drive shaft 11 as the rotation shaft. The ladder cord 9 to be hung from the tilt drum 51 and the elevating cord 10 to be hung from the take-up shaft 52 are led out from the outlet 50a provided on the bottom surface of the support case 50.

However, the take-up shaft 52 in the cord support unit 5b of the second embodiment is capable of winding or rewinding the tape-shaped elevating cord 10 in multiple layers, and the tilt drum 51 has a hanging member 511 by a torsion coil spring. It is attached to support the rudder cord 9 in a suspended manner. Such a configuration of the cord support unit 5b is suitable for a horizontal blind that requires miniaturization.

In the hanging member 511, both ends of the torsion coil spring are bent to form a loop-shaped ladder cord attachment portion 511a and a locking end portion 511b. The upper ends of the pair of front and rear ladder cords 9 are attached to the ladder cord attachment portion 511a and are suspended and supported. Then, the hanging member 511 is attached by tightening the tilt drum 51, and is integrally rotated with the tilt drum 51 until the locking end portion 511b abuts on the wall portion formed on the support case 50, and is locked. When the end portion 511b comes into contact with the wall portion formed on the support case 50, the tightening force is weakened and the tilt drum 51 slips. Therefore, based on the rotation of the tilt drum 51, the angles of the slats 4 are adjusted in the same phase via the ladder cord 9.

Although it is possible to apply the delay unit 5a of the first embodiment shown in FIG. 3 to the cord support unit 5b of the second embodiment, the delay unit of the second embodiment can be utilized in order to take advantage of the intention of requiring miniaturization thereof. In 5a, it is configured as shown in FIG.

With reference to FIG. 14, the delay unit 5a of the second embodiment omits the rotary relay plate 59 and has a smaller shape of the case members 55a and 55b as compared with the first embodiment. The output shaft member 56, the brake spring 57, the spring case 58, and the input shaft member 60 of the above are shared with the first embodiment.

Further, as for the shapes of the case members 55a and 55b, as compared with the first embodiment, the formation of the accommodating portion 555 accommodated by the rotary relay plate 59 is omitted, and the shaft portion 606 and the flange 604 of the input shaft member 60 are each case. The same operation and effect as in Example 1 except that the members 55a and 55b are supported by the circular opening 559d and the opening side surface 559b at the end on the drive transmission input side so as to be relatively rotatable and contribute to miniaturization. Produces.

That is, in the delay unit 5a of the second embodiment, the rotation relay plate 59 is omitted, the input shaft member 60 is directly connected to the output shaft member 56, and the input shaft member 60 and the output shaft member 56 are connected to each other. The delay amount is configured to work, and a different delay amount is generated while sharing the same output shaft member 56, brake spring 57, spring case 58, and input shaft member 60 as in the first embodiment.

For example, as described above with reference to FIG. 5C, the amount of delay between the input shaft member 60 and the output shaft member 56 when the rotary relay plate 59 is not used is a protrusion protruding within an angle α1. The delay amount η is formed between the portion 564 and the protrusion piece 603 protruding in the range of the angle α4. For example, if α1 ≈ 60 degrees and α4 ≈ 60 degrees, the delay amount η ≈ 240 degrees. Therefore, various delay amounts can be realized by setting the rotation amount delayed by the delay unit 5a to be equal to or greater than the angle adjustment range of the slat 4.

Then, also in the second embodiment, as shown in FIG. 13B, the tilt drum 51 is connected to the drive shaft 11 so as not to rotate relative to the drive shaft 11 and is supported by the support case 50. On the other hand, the take-up shaft 52 is supported by the support case 50 as unconnected (non-engaged) with respect to the drive shaft 11. Further, an obstacle detection / stopping device 53 is provided on the tip end side of the take-up shaft 52 to prevent the take-up shaft 52 supporting the elevating cord 10 from rotating when tension in the pulling direction does not act on the elevating cord 10. However, the obstacle detection / stopping device 53 is also supported by the support case 50 as a non-connection (non-engagement) with respect to the drive shaft 11. The case body of the obstacle detection / stopping device 53 is fixed to the tip end side of the take-up shaft 52, but the tubular cam shaft 531 housed in the case body of the obstacle detection / stopping device 53 is being lowered while the slat 4 is descending. When the bottom rail 8 collides with an obstacle, the rewinding of the elevating cord 10 is stopped, the descent of the slat 4 and the bottom rail 8 is stopped, and there is a play necessary to prevent the reverse winding of the elevating cord 10. , It is possible to rotate integrally with the rotation of the take-up shaft 52.

Further, also in the delay unit 5a of the second embodiment, the input shaft member 60 is the only member that rotates directly connected to the drive shaft 11, and the delay unit 5a of the second embodiment is simply arranged side by side on the drive shaft 11. The rotation of the tilt drum 51 can be interlocked with the rotation of the take-up shaft 52 via the obstacle detection / stopping device 53 with a predetermined delay amount.

In particular, as shown in FIG. 15, the case portions 55a and 55b of the delay unit 5a of the second embodiment are driven by a claw portion 558 that grips the protrusion 50b provided on the support case 50 of the cord support unit 5b. It is formed on each side wall on the transmission output side. As a result, the delay unit 5a of the second embodiment can be stably assembled on the drive shaft 11 in a manner that can be easily attached to and detached from the cord support unit 5b.

Further, also in the second embodiment, the case members 55a and 55b are configured to be fitted and formed in the direction perpendicular to the drive shaft 11, and have a strong fitting force against the rotation of the drive shaft 11, so that the screws and the like are united. It does not need to be formed, and comprehensively contributes to facilitation of assembling and cost reduction.

Further, as shown in FIG. 14, also in the second embodiment, the case members 55a and 55b are formed with an upper corner portion 550a having a dent in a square shape. Therefore, when the delay unit 5a is installed in the head box 1, the upper corner portion 550a of the delay unit 5a supported by the lower corner portion 550b engages with the upper end of the head box 1 (similar to FIG. 6 described above). ), It is possible to suppress rattling in the front-back direction and the up-down direction. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, rattling in the left-right direction can be suppressed by grasping the case members 50b of the support case 50 in the cord support unit 5b. Will be done.

Further, also in this 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 / stopping device 53 is configured to engage with the shaft portion 561, so that a slight rotation operation is required. It can be assembled, and its assemblability is improved.

Then, in the case of the horizontal blind to which the cord support device 5 having the delay unit 5a of the second embodiment is applied, the rotation of the tilt drum 51 and the take-up shaft 52 can be operated by one drive shaft 11. Even in this case, if a tilt operation without raising and lowering the slats 4 is desired, the bottom rail 8 does not move up and down by the tilt operation. Further, when the bottom rail 8 is not in the lower limit position, the operability of tilting after the folded portion of the slats 4 is raised during the tilt operation is not impaired.

Further, in this embodiment, an example of engaging the shaft portion 561 of the output shaft member 56 with the cam shaft 531 of the obstacle detection / stopping device 53 has been described, but the take-up shaft does not go through the obstacle detection / stopping device 53. Even in the case of engaging with 52, the action / effect according to the present invention can be exhibited.

[Other Examples]
In the delay units 5a of the first and second embodiments described above, the assembling property is improved in forming the cord support device 5 by arranging them side by side on the outside of various support cases 50, and the cord support device 5 is downsized. He explained that it is excellent in versatility, reduction of parts management burden, and practicality that contributes to cost reduction. In particular, it was intended to increase the number of shared members as much as possible between the delay units 5a of the first and second embodiments, with an emphasis on contributing to reduction of the burden of parts management and cost reduction.

Since the increase in size of the cord support device 5 in the front-rear direction or the up-down direction also involves an increase in the size of the shielding device itself, the delay units 5a of the first and second embodiments can avoid the increase in size, which is effective. It produces various actions and effects.

On the other hand, as can be seen by comparing the delay unit 5a of the first embodiment shown in FIG. 3 with the delay unit 5a of the second embodiment shown in FIG. 14, the delay unit 5a of the first embodiment shown in FIG. Compared to the delay unit 5a of Example 2, the case members 55a and 55b are configured to be larger in the left-right direction. Therefore, for example, when the installation margin in the head box 1 is not sufficient, it is assumed that the width of the case members 55a and 55b in the delay unit 5a of the first embodiment should be made smaller in the left-right direction.

Therefore, Examples 3 and 4 will be described in order as a configuration example in which the size of the delay unit 5a itself in the left-right direction is emphasized rather than contributing to the reduction and cost reduction of the parts management burden. To do. Comprehensively, in Examples 1 and 2, the rotation transmission portion that causes a predetermined delay amount is associated with the drive shaft 11 in the axial direction, but in Examples 3 and 4, the drive shaft 11 is connected to the drive shaft 11. The widths of the case members 55a and 55b in the delay units 5a of the third and fourth embodiments are made smaller in the left-right direction by configuring the rotation transmission portions that generate the predetermined delay amount in the vertical direction. ..

(Example 3)
FIG. 16 is an exploded perspective view showing a schematic configuration of a delay unit of the third embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention. The components having the same functions as those in the first embodiment are designated by the same reference numbers. As shown in FIG. 16, the delay unit 5a of this embodiment has an output shaft member 56, a brake spring 57, a spring case 58, a rotary relay plate 59, and an input shaft member, as in the first embodiment described above. It is composed of 60 and case members 55a and 55b.

The output shaft member 56 in this embodiment has an outer octagonal tubular shaft portion 561 and a flange 567 having a tubular shaft portion 568 formed on the base end side (drive transmission input side) of the shaft portion 561. A protrusion 564 projecting from the center of the axis to the drive transmission input side within a predetermined angle (angle α1 described later) is provided in the vicinity of a part of the outer circumference thereof. The shaft portion 568 and the flange 567 of the output shaft member 56 are rotatably supported by the circular opening 559c and the opening side surface 559a on one opening side surface 559a (drive transmission output side) of the case members 55a and 55b, respectively. To. In the output shaft member 56 of this embodiment, engaging receiving portions 563a and 563b recessed in a stepped shape are formed on the surface of the flange 567 on the base end side (drive transmission input side). Further, the shaft portion 561 is formed with a shaft hole 565 through which the drive shaft 11 can be inserted without engagement. The outer octagonal tubular shaft portion 561 is rotatable and rotatable integrally with the tubular cam shaft 531 having the octagonal shaft hole 531a of the obstacle detection / stopping device 53, and is an output shaft. The rotation of the member 56 can be transmitted so as to rotate in synchronization with the cam shaft 531 of the obstacle detection / stopping device 53 (similar to FIG. 2B described above).

The brake spring 57 and the spring case 58 have a larger diameter than those of the first and second embodiments in order to accommodate the rotary relay plate 59 of the present embodiment, which will be described later, inside the brake spring 57 and the spring case 58. Similar to 2 and 2, it functions as a braking member that suppresses the rotation of the output shaft member 56 other than the rotation due to the rotation transmission from the input shaft member 60. That is, a predetermined braking force is applied to the rotation of the output shaft member 56 transmitted from the cam shaft 531 of the obstacle detection / stopping device 53. In order to maintain the elevating position of the slat 4 in a stable manner, the pair of end portions 571 of the coiled brake spring 57 is provided with an output shaft so that the take-up shaft 52 is not idle except during the elevating operation. It is fitted so as to engage with both side surfaces of the protrusion 564 of the member 56. Further, the spring case 58 accommodates the coiled brake spring 57 in a reduced diameter state, whereby the brake spring 57 can rotate relative to the spring case 58 by constantly pressing the inner peripheral surface of the spring case 58. However, the predetermined braking force is activated. On the other hand, in the spring case 58, a pair of recesses 582 provided in a part thereof are non-rotatably locked by convex portions 557 provided in each of the case members 55a and 55b to accommodate the case members 55a and 55b, respectively. Since it is fitted to the portion 556, the spring case 58 is fixed so as not to rotate.

The rotary relay plate 59 of this embodiment is significantly different from the above-described first embodiment. The rotary relay plate 59 of the present embodiment has a diameter smaller than the diameter of the brake spring 57 housed in the spring case 58, has a protrusion 592a on a part of the outer peripheral surface thereof, and has an inner peripheral surface. It is composed of a substantially cylindrical member having a rotary receiving portion 594 in a part of the upper part, and a shaft hole 591 having substantially the same diameter as the shaft hole 565 of the output shaft member 56 is formed. Therefore, the shaft hole 591 can be inserted through the drive shaft 11 without engagement. The drive transmission output side surface of the rotary relay plate 59 has a shape capable of contacting the engagement receiving portions 563a and 563b on the drive transmission input side surface of the output shaft member 56 via the inside of the brake spring 57, and the contact arrangement thereof. In this state, the rotary relay plate 59 is located inside the brake spring 57 housed in the spring case 58 with a reduced diameter, and is housed so as to be rotatable relative to the case members 55a and 55b. Therefore, the protrusion 592a of the rotation relay plate 59 can be relatively rotated as long as it is within the range of the engagement receiving portion 563b in the recessed region excluding the protrusion 564 of the output shaft member 56, that is, the rotation relay plate 59 rotates. Even so, the rotation is not transmitted to the output shaft member 56 until the protrusion 592a comes into contact with the protrusion 564 of the output shaft member 56 via the end portion 571 of the brake spring 57, but after the contact. The rotation of the rotation relay plate 59 is transmitted to the output shaft member 56.

Further, on the inner peripheral surface of the rotation relay plate 59, a recessed engagement receiving portion 593 is formed around the shaft hole 591 except for a part of the rotation receiving portion 594. The rotation receiving portion 594 is formed within a range of a predetermined angle (an angle α3 described later) from the axis center of the shaft hole 591. In this example, the rotation receiving portion 594 and the protrusion 592a are formed within the same rotation angle range, but the size and arrangement of the rotation receiving portion 594 and the protrusion 592a are changed depending on the application. be able to.

The input shaft member 60 has a tubular shaft portion 601 having a substantially square hole-shaped shaft hole 602 directly connected to the drive shaft 11, and a range of a predetermined angle (angle α4 described later) from the shaft center of the shaft portion 601. A protrusion 603 projecting alongside the shaft portion 601 is formed on the drive transmission output side surface of the flange 604 on which the tubular shaft portion 606 is formed. The shaft portion 606 and the flange 604 of the input shaft member 60 accommodate the case members 55a and 55b, respectively, in a state where the output side surface of the flange 604 of the input shaft member 60 is arranged so as to be in contact with the base end surface of the rotary relay plate 59. It is supported by the circular opening 559d and the opening side surface 559b at the end of the portion 556 on the drive transmission input side so as to be relatively rotatable. Further, the shaft portion 601 can support the shaft hole 565 of the output shaft member 56 and the shaft hole 591 of the rotary relay plate 59.

Therefore, the protrusion 603 of the input shaft member 60 can be relatively rotated as long as it is within the range of the engaging receiving portion 593 of the rotation relay plate 59, that is, the input shaft member 60 directly connected to the drive shaft 11 rotates. Even so, the rotation is not transmitted to the rotation relay plate 59 until the protrusion piece 603 comes into contact with the rotation receiving portion 594 of the rotation relay plate 59, but after the contact, the rotation of the input shaft member 60 does not occur. The rotation is transmitted to the rotation relay plate 59.

Therefore, in the delay unit 5a of the third embodiment, the delay amount between the input shaft member 60 and the rotation relay plate 59 and the rotation relay plate 59 before the rotation of the input shaft member 60 is rotationally transmitted to the output shaft member 56. The delay amount, which is the sum of the delay amounts between the output shaft member 56 and the output shaft member 56, is used.

For example, as shown in FIG. 18A, the delay amount between the rotary relay plate 59 and the output shaft member 56 is a protrusion 564 protruding in the range of the angle α1 and a protrusion 592a protruding in the range of the angle α2. The delay amount is β between and. Further, as shown in FIG. 18B, the delay amount between the input shaft member 60 and the rotation relay plate 59 is the rotation receiving portion 594 in the range of the angle α3 and the protrusion 603 protruding in the range of the angle α4. The delay amount is γ. 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 realize the same function as the delay unit 5a of the first embodiment, and the rotation relay plate 59 functions as a delay adjusting member for rotation relay with a predetermined delay amount.

In particular, in the delay unit 5a of the present embodiment, the rotary relay plate 59 is located inside the spring case 58 and is housed in the case portions 55a and 55b, so that the delay unit 5a of the first embodiment is equivalent to the delay unit 5a. The width in the direction and the upper limit direction 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.

Among the constituent members of the delay unit 5a of the third embodiment, the input shaft member 60 is the only member that rotates directly connected to the drive shaft 11, and the delay unit 5a of the third embodiment is arranged side by side on the drive shaft 11. By simply doing so, it is possible to perform interlocking rotation with a predetermined delay amount relative to the rotation of the tilt drum 51 with respect to the rotation of the take-up shaft 52 via the obstacle detection / stopping device 53 (similar to FIG. 4 described above).

Further, also in this embodiment, the case portions 55a and 55b are formed with claw portions 558 on the side wall portions on the drive transmission output side, which are gripped by the protrusions 50b provided on the support case 50 of the cord support unit 5b, respectively. Has been done. As a result, the delay unit 5a of the third embodiment can be stably assembled on the drive shaft 11 in such a manner that it can be easily attached to and detached from the cord support unit 5b.

Then, in the case of a horizontal blind to which the cord support device 5 having the delay unit 5a of the third embodiment is applied, if a tilt operation without raising and lowering the slat 4 is desired, the bottom rail 8 is moved up and down by the tilt operation. Never. Further, when the bottom rail 8 is not in the lower limit position, the operability of tilting after the folded portion of the slat 4 is raised during the tilt operation is not impaired (similar to FIG. 6 described above).

Further, as shown in FIG. 16, also in the third embodiment, the case members 55a and 55b are formed with an upper corner portion 550a having a dent in a square shape. Therefore, when the delay unit 5a is installed in the head box 1, the upper corner portion 550a of the delay unit 5a supported by the lower corner portion 550b engages with the upper end of the head box 1 (similar to FIG. 6 described above). ), It is possible to suppress rattling in the front-back direction and the up-down direction. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, rattling in the left-right direction can be suppressed by grasping the case members 50b of the support case 50 in the cord support unit 5b. Will be done.

(Example 4)
Next, the cord support device 5 having the delay unit 5a of the fourth embodiment according to the obstacle detection / stopping device 53 of the present embodiment will be described. FIG. 17 is an exploded perspective view showing a schematic configuration of the delay unit of the fourth embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention. The components having the same functions as those in the third embodiment are designated by the same reference numbers. As shown in FIG. 17, the delay unit 5a of the present embodiment has the output shaft member 56, the brake spring 57, the spring case 58, the input shaft member 60, and the case member 55a, as in the third embodiment described above. , 55b.

With reference to FIG. 17, the delay unit 5a of the fourth embodiment maintains a miniaturized shape of the case members 55a and 55b as compared with the third embodiment, and omits the rotary relay plate 59. The shape of the input shaft member 60 has been changed accordingly, and the other output shaft member 56, the brake spring 57, and the spring case 58 are shared with the third embodiment.

The input shaft member 60 in the delay unit 5a of the fourth embodiment is connected to a tubular shaft portion 601 having a substantially square hole-shaped shaft hole 602 directly connected to the drive shaft 11 on the base end side of the shaft portion 601. A tubular relay shaft portion 605 having a larger diameter and a square hole-shaped shaft hole 602, and a relay shaft portion within a predetermined angle (angle α5 described later) from the shaft center of the shaft portion 601 and the relay shaft portion 605. A protruding piece 603a that projects alongside the 605 is formed via a flange 604.

The shaft portion 601 can support the shaft hole 565 of the output shaft member 56. Then, the input shaft member 60 is arranged so that the boundary surface of the relay shaft portion 605 with the shaft portion 601 passes through the inside of the brake spring 57 and comes into contact with the engagement receiving portion 563a at the base end surface of the output shaft member 56. The shaft portion 606 and the flange 604 are supported by the circular opening 559d and the opening side surface 559b at the end of the housing portion 556 of the case members 55a and 55b on the drive transmission input side so as to be relatively rotatable. At this time, the relay shaft portion 605 is located inside the brake spring 57 housed in the spring case 58 with a reduced diameter, and is housed so as to be rotatable relative to the case members 55a and 55b.

Therefore, the protruding piece 603a of the input shaft member 60 can rotate relative to the range of the engaging receiving portion 563b on the base end surface of the output shaft member 56, that is, the input shaft member directly connected to the drive shaft 11. Even if the 60 rotates, the rotation is not transmitted to the output shaft member 56 until the protrusion piece 603a comes into contact with the protrusion 564 of the output shaft member 56, but after the contact, the input shaft member 60 The rotation is transmitted to the output shaft member 56.

In addition, the shapes of the case members 55a and 55b also maintain the shape that contributed to the miniaturization, and the same effects as in the third embodiment are produced.

For example, as shown in FIG. 18C, the amount of delay between the input shaft member 60 and the output shaft member 56 when the rotary relay plate 59 is not used is an angle with the protrusion 564 protruding within the range of the angle α1. The delay amount η is obtained between the protrusion piece 603a and the protrusion piece 603a that protrudes in the range of α5.

Then, also in the fourth embodiment, as in the second embodiment (similar to FIG. 13B described above), the tilt drum 51 is connected to the drive shaft 11 so as not to rotate relative to the drive shaft 11 and is supported by the support case 50. On the other hand, the take-up shaft 52 is supported by the support case 50 as unconnected (non-engaged) with respect to the drive shaft 11. Further, an obstacle detection / stopping device 53 is provided on the tip end side of the take-up shaft 52 to prevent the take-up shaft 52 supporting the elevating cord 10 from rotating when tension in the pulling direction does not act on the elevating cord 10. However, the obstacle detection / stopping device 53 is also supported by the support case 50 as a non-connection (non-engagement) with respect to the drive shaft 11. The case body of the obstacle detection / stopping device 53 is fixed to the tip end side of the take-up shaft 52, but the tubular cam shaft 531 housed in the case body of the obstacle detection / stopping device 53 is being lowered while the slat 4 is descending. When the bottom rail 8 collides with an obstacle, the rewinding of the elevating cord 10 is stopped, the descent of the slat 4 and the bottom rail 8 is stopped, and there is a play necessary to prevent the reverse winding of the elevating cord 10. , It is possible to rotate integrally with the rotation of the take-up shaft 52.

Further, also in the delay unit 5a of the fourth embodiment, the input shaft member 60 is the only member that rotates directly connected to the drive shaft 11, and the delay unit 5a of the fourth embodiment is simply arranged side by side on the drive shaft 11. The rotation of the tilt drum 51 can be interlocked with the rotation of the take-up shaft 52 via the obstacle detection / stopping device 53 with a predetermined delay amount.

Further, also in the delay unit 5a of the fourth embodiment, in the case portions 55a and 55b, the claw portion 558 that grips the protrusion portion 50b provided on the support case 50 of the cord support unit 5b has a side wall on the drive transmission output side. It is formed in each part. As a result, the delay unit 5a of the fourth embodiment can be stably assembled on the drive shaft 11 in such a manner that it can be easily attached to and detached from the cord support unit 5b.

Further, as shown in FIG. 17, also in the fourth embodiment, the case members 55a and 55b are formed with an upper corner portion 550a having a dent in a square shape. Therefore, when the delay unit 5a is installed in the head box 1, the upper corner portion 550a of the delay unit 5a supported by the lower corner portion 550b engages with the upper end of the head box 1 (similar to FIG. 6 described above). ), It is possible to suppress rattling in the front-back direction and the up-down direction. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, rattling in the left-right direction can be suppressed by grasping the case members 50b of the support case 50 in the cord support unit 5b. Will be done.

In addition, in the delay unit 5a in each of the first to fourth embodiments, as shown in FIG. 19A, the delay unit is gripped by the above-mentioned claw portion 558 by fitting with the protrusion 50b of the support case 50. An example of axially connecting the shaft portion 561 (octagonal shaft in the illustrated example) of the output shaft member 56 in 5a and the shaft hole 531a (octagonal shaft hole in the illustrated example) of the camshaft 531 of the obstacle detection / stopping device 53 will be described. However, it is also possible to realize the shaft connection by directly gripping (fitting) the shaft portion 561 and the cam shaft 531.

For example, as shown in FIG. 19B, the shaft connection can be realized by directly gripping (fitting) the shaft portion 561 and the cam shaft 531. With reference to FIG. 19B, in the delay unit 5a, instead of providing the claw portion 558, the shaft portion 561 of the output shaft member 56 is formed into a cylindrical shape, and the convex portions 561b are provided at two opposite positions on the inner peripheral surface 561a thereof. Provide. Further, on the inner peripheral surface 561a of the shaft portion 561, elastically deformable engaging pieces 561d are provided at two positions orthogonal to the two opposed convex portions 561b so as not to hinder the insertion of the drive shaft 11. Each engaging piece 561d is provided with a fitting protrusion 561c on the outer surface with respect to the axial center of the inner peripheral surface 561a. On the other hand, instead of using the shaft hole 531a shown in FIG. 19A as the connecting portion of the cam shaft 531 of the obstacle detection / stopping device 53, a two-stage step is provided on the outer peripheral surface thereof with a step between the portion 5310 and the portion 5319. The outer peripheral surface shape is formed, and recesses 531b are provided at two opposite locations of the portion 5319. Further, a fitting wall 531c having a diameter shorter than the inner peripheral wall forming the shaft hole 5313 of the cam shaft 531 and allowing the drive shaft 11 to be inserted is provided on the surface of the connecting portion of the cam shaft 531.

Then, the convex portion 561b at the two opposing positions of the shaft portion 561 can be engaged with the two opposing concave portions 531b of the portion 5319 of the cam shaft 531. In the connected state by this engagement, the connecting end of the shaft portion 561. The fitting protrusion 561c of the elastically deformable engaging piece 561d of the shaft portion 561 fits with the fitting wall 531c of the cam shaft 531 at a position where the portion substantially abuts with the portion 5310 of the portion 5319 of the cam shaft 531. It is configured as a locking means for locking the shaft portion 561 of the delay unit 5a with respect to the cam shaft 531. In the connected state by this engagement, the support case 50 rotatably supports the cylindrical shaft portion 561 of the output shaft member 56. Note that FIG. 19B shows an example, and various deformation examples are assumed, such as the shapes of the convex portion 561b and the concave portion 531b being interchanged with each other.

By constructing the shaft portion 561 and the cam shaft 531 as illustrated in FIG. 19B and connecting them to each other, the claw portion 558 and the protrusion 50b as shown in FIG. 19A are not provided. The delay unit 5a can be gripped by the cord support unit 5b in such a manner that the rotations of the shaft portion 561 and the cam shaft 531 are connected so as not to rotate relative to each other and the deviation in the left-right direction does not occur.

(Example 5)
Next, the cord support device 5 having the delay unit 5a of the fifth embodiment according to the obstacle detection / stopping device 53 of the present embodiment will be described. FIG. 20 is an exploded perspective view showing a schematic configuration of the delay unit 5a of the fifth embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention. 21 and 22 are perspective views showing a method of assembling the cord support device 5 of the modified example having the delay unit 5a of the fifth embodiment according to the present invention, and a schematic configuration thereof. The delay unit 5a and the cord support device 5 of the fifth embodiment shown in FIGS. 20 to 22 are shown as a modification from the above-described first embodiment. Similar modifications can be configured from Examples 2 to 4. Further, the same reference numbers are assigned to the same components as those in each of the above-described embodiments.

In Examples 1 to 4 described above, an example in which the delay unit 5a is arranged side by side from the outside of the support case 50 of the cord support device 5 has been described, but in the fifth embodiment, the delay unit 5a is the support case of the cord support device 5. This is an example in which the take-up shaft 52 is supported inward of the 50 and is configured to rotate in conjunction with the rotation of the tilt drum 51 by a predetermined delay amount on the drive shaft 11.

As shown in FIG. 20, the delay unit 5a of the fifth embodiment has the output shaft member 56, the brake spring 57, the spring case 58, and the rotary relay plate 59, similarly to the above-described first embodiment (see FIG. 3). The shape of the case member 55 for accommodating the input shaft member 60 and the shape of the input shaft member 60 are partially different from those of the first embodiment.

With reference to FIG. 20, the delay unit 5a of the fifth embodiment has a shape suitable for supporting the case member 55 inside the support case 50 of the cord support device 5 as compared with the first embodiment. The shape of the input shaft member 60 is changed accordingly, and the output shaft member 56, the brake spring 57, and the spring case 58 are shared by various cord support devices 5.

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

The shaft portion 606 of the input shaft member 60 is provided in the support case 50 of the cord support device 5 as shown in FIGS. 21 and 22 when the delay unit 5a is supported inward of the support case 50 of the cord support device 5. It is rotatably supported by the bearing portion 50c.

The output shaft member 56, the brake spring 57, the spring case 58, and the rotation relay plate 59 have the same shape as in the first embodiment, and the rotation of the input shaft member 60 is rotationally transmitted to the output shaft member 56. By now, the delay amount obtained by totaling the delay amount between the input shaft member 60 and the rotary relay plate 59 and the delay amount between the rotary relay plate 59 and the output shaft member 56 is applied.

The case member 55 in the delay unit 5a of the fifth embodiment has a shape suitable for being supported inside the support case 50 of the cord support device 5, and in this example, the output shaft member 56 and the brake spring 57 are formed. , A spring case 58, a rotary relay plate 59, and a leg portion 550c extending downward with a substantially E-shaped cross section for forming a lower corner portion 550b on a cylindrical main body having an accommodating portion 556 accommodating an input shaft member 60. It is provided.

The peripheral surface of the accommodating portion 556 of the case member 55 rotatably supports the peripheral edge of the flange 604 of the input shaft member 60, and the convex portion 557 provided on the peripheral surface of the accommodating portion 556 is a part of the spring case 58. The spring case 58 is fixed so as not to rotate by locking a pair of recesses 582 provided in the above. Further, the shaft portion 568 and the flange 567 of the output shaft member 56 are relatively rotatablely supported by the circular opening 559c and the opening side surface 559a on one side surface (drive transmission output side) of the case member 55, respectively. Therefore, the shaft portion 561 of the output shaft member 56 protrudes from the circular opening 559c of the case member 55, and can be integrally rotatably engaged with the cam shaft 531 of the obstacle detection / stopping device 53.

As shown in FIG. 21, the delay unit 5a of the fifth embodiment configured in this way first delays the cord support unit 5b including the tilt drum 51, the take-up shaft 52, and the obstacle detection / stopping device 53. The shaft portion 561 of the output shaft member 56 in the unit 5a is inserted and integrated so as to engage with the shaft hole 531a in the cam shaft 531 of the obstacle detection / stopping device 53. Subsequently, the delay unit 5a, the obstacle detection / stopping device 53, the take-up shaft 52, and the tilt drum 51 are placed and accommodated in the accommodation portions 50d, 50e, 50f, and 50g of the support case 50, respectively, to accommodate the cord support device. 5 is configured. Then, as shown in FIG. 22, the drive shaft 11 is inserted through the cord support device 5.

As a result, the delay unit 5a of the fifth embodiment stops obstacle detection so that the take-up shaft 52 rotates in conjunction with the rotation of the tilt drum 51 on the drive shaft 11 with a predetermined delay amount as shown in FIG. It is connected to the take-up shaft 52 via the device 53 and is housed in the support case 50 of the cord support device 5.

In the case member 55 of the delay unit 5a of the fifth embodiment, the lower corner portion 550b of the leg portion 550c is stably supported inside the support case 50 of the cord support device 5 so as not to be displaced in the left-right direction and the front-rear direction. Will be done. Then, the drive shaft 11 is inserted into the cord support device 5 supported in the head box 1, and the delay unit 5a does not deviate in the vertical direction (and the horizontal direction).

As described above, the delay unit 5a and the cord support device 5 of the first embodiment are modified so that the delay unit 5a is supported inside the support case 50 of the cord support device 5 as in the fifth embodiment. Even if it is desired that the tilt drum 51 and the take-up shaft 52 can be rotated by one drive shaft 11 and the tilt operation without raising and lowering the slats 4 is desired, the bottom rail 8 is moved up and down by the tilt operation. It is possible to solve the problem of spilling. In particular, when the bottom rail 8 is not in the lower limit position, it is possible to solve the problem that the slat convolution portion rises and then tilts during the tilt operation.

[Horizontal blinds of other embodiments using an obstacle detection / stopping device]
Next, the horizontal blind of another embodiment using the obstacle detection / stopping device 53 will be described with reference to FIGS. 23 and 24. In the above-described embodiment of FIGS. 1 to 22, any of the delay units 5a of the first to fifth embodiments is used so that the rotation amount of the take-up shaft 53 can be delayed relative to the tilt drum 51. explained. On the other hand, in the present embodiment, the operating amount that prevents the winding shaft 11 from rotating by the obstacle detection / stopping device 53 can be adjusted by a predetermined rotation amount without providing the delay unit 5a as described above. An example of providing the adjusting member 54 will be described.

The horizontal blind of the present embodiment will be described with reference to FIG. 1 in that the delay unit 5a is not provided, and the operating amount adjusting member 54 is connected to the obstacle detection / stopping device 53 inside the take-up shaft 52. Other components can be the same as they are, except that they are allowed to do so. That is, in the horizontal blind in which the operation amount adjusting member 54 is provided in the obstacle detection / stopping device 53 without providing the delay unit 5a, the bottom rail 8 is allowed to move up and down when the angle of the slats 4 is adjusted. Instead, the amount of operation by the obstacle detection / stopping device 53 can be adjusted.

More specifically, the horizontal blind of the present embodiment is configured to include an obstacle detection / stopping device 53 that enables the slat 4 to be raised / lowered and tilted by one drive shaft 11, and is provided by the obstacle detection / stopping device 53. A working amount adjusting member 54 that can adjust the amount of rotation that prevents the winding shaft 11 from rotating by a predetermined amount of rotation is connected to the obstacle detection / stopping device 53 inside the winding shaft 52.

FIG. 23 is an exploded perspective view of the operating amount adjusting member 54 of the embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention. Further, FIGS. 24A and 24B are diagrams showing the operation relationship of the operation amount adjusting member 54 of the embodiment according to the obstacle detection / stopping device 53 of the embodiment according to the present invention, respectively. In the sixth embodiment, the same reference numbers are given to the components having the same functions as those in the first embodiment.

With reference to FIG. 23, the shapes, structures, and operations of the cam shaft 531, the cam clutch 532, and the cap 533 constituting the obstacle detection / stopping device 53 are the same as those described with reference to FIGS. 7 to 12 described above. is there.

That is, also in the present embodiment, the obstacle detection / stopping device 53 is connected to the cap 533 which is attached to the take-up shaft 11 so as not to rotate relative to the take-up shaft 11 and the cap 533 by the amount of rotation which prevents the take-up shaft 11 from rotating. The cam shaft 531 has a cam shaft 531 and a cam clutch 532 that can move relative to the take-up shaft 11 in the axial direction according to the rotation direction of the cam shaft 531. The cam shaft 531 rotates the take-up shaft 11. The cap 533 is configured to be brought into contact with the cap 533 by two or more protruding portions 5314 and 6334 provided with each other in the rotational direction.

Further, on the cam shaft 531, one protrusion 5318 is formed on the stepped portion where the tubular portion 5311 and the tubular portion 5312 are connected in a positional relationship relatively opposed to the position of the sliding protrusion 5315 described above. Has been done. Further, the cam shaft 531 is formed with an engaging groove 5317 in the vicinity of the end portion of the tubular portion 5312 on the drive transmission output side. The cap 533 is composed of a substantially tubular member having two stages of accommodating portions 5330 and 5331 which are connected by steps with different diameters in the radial direction from the drive transmission input side to the drive transmission output side. Accommodates the tubular portion 5312 of the camshaft 531 so as to be relatively rotatable with a gap corresponding to the thickness of the protrusion 5318. As shown in FIG. 23, one of the three protruding portions 5316 is formed on a section that bends on the tubular portion 5311, and the three protruding portions 5316 are engaged with the protruding wall 5332 to cam. The shaft 531 can be assembled to the cap 533.

On the other hand, as shown in FIG. 23, the working amount adjusting member 54 is formed in a substantially tubular outer shape, and an engaging hole 5353 that engages with the drive shaft 11 so as not to rotate relative to the drive shaft 11 is formed at one end thereof. In the case of this example, the operating amount adjusting member 54 is on the drive transmission input side. Further, when the tubular portion 5310 of the cam shaft 531 is assembled so as to be accommodated in the cap 533, the other end of the working amount adjusting member 54 is a step in which the tubular portion 5311 and the tubular portion 5312 of the cam shaft 531 are connected. It can be assembled to a position where it almost touches the part.

When assembled in this way and the other end of the working amount adjusting member 54 is accommodated in the accommodating portion 5331 through a gap corresponding to the thickness of the protrusion 5318 in the cap 533, it is on the inner peripheral surface in the operating amount adjusting member 54. The protruding portions 5352 provided at the two locations are engaged with the engaging groove 5317 of the cam shaft 531 and assembled to the cam shaft 531.

At this time, a protrusion 5354 is formed on the other end of the working amount adjusting member 54, and as shown in FIG. 24A, the protrusion 5354 comes into contact with the protrusion 5318 on the cam shaft 531. Relative rotation is possible within a predetermined angle range (in this example, the angle is ψ), and the rotation amount θ that prevents the rotation of the take-up shaft 11 can be changed to be added by a predetermined rotation amount ψ. As described above, by adding the operation amount adjusting member 54, the rotation amount θ that prevents the rotation of the take-up shaft 11 can be adjusted to another rotation amount.

That is, as shown in FIG. 24 (b), in the above-mentioned example of FIG. 10 (b), the angle from when the bottom rail 8 collides with an obstacle to when the obstacle detection is activated is an angle at the maximum. It is possible to add the rotation amount of the obstacle detection / stopping device 53, which is regulated to be within θ, by a predetermined rotation amount ψ. By changing the shape of the protrusion 5354, the operating amount adjusting member 54 can change the range of the predetermined rotation amount ψ in the range of 0 ≦ ψ <360. In this way, the operating amount adjusting member 54 makes it possible to change the angle from when the bottom rail 8 by the obstacle detection / stopping device 53 collides with the obstacle to when the obstacle detection is in the operating state. The specifications can be diverted to the horizontal blind, and the versatility of the obstacle detection / stopping device 53 will be enhanced.

Although the present invention has been described above with reference to examples of specific embodiments, the present invention is not limited to the examples of the above-described embodiments, and various modifications can be made without departing from the technical idea. For example, in the example of the above-described embodiment, the example via the obstacle detection / stopping device 53 has been mainly described, but the present invention is not limited to this, and the winding shaft 52 is directly or indirectly engaged with the winding shaft 52. If so, the action / effect according to the present invention can be exerted.

Further, in the example of the above-described embodiment, an example in which the delay unit 5a is used properly for each type of the cord support unit 5b is mainly described. For example, the cord support unit 5b shown in FIG. 7 is compared with the cord support unit 5b of the second embodiment. Instead of applying the delay unit 5a, a rotary relay plate 59 that does not generate a delay amount is prepared and applied to the delay unit 5a of the first embodiment, and the same delay amount as when the delay unit 5a of the second embodiment is applied is applied. It can also be configured to obtain, and in this case, the case members 55a and 55b can be shared.

According to the present invention, the rotation of the tilt drum and the take-up shaft can be operated by one drive shaft, and when a tilt operation without raising and lowering the slats is desired, the bottom rail moves up and down by the tilt operation. In particular, it enhances the versatility of the obstacle detection and stopping device and has excellent responsiveness, so it is a horizontal blind that enables the operation of raising and lowering and tilting the slats with one drive shaft. It is useful for the purpose of.

1 Headbox 4 Slat 5 Cord support device 5a Delay unit 5b Cord support unit 6 Ladder cord support member 8 Bottom rail 9 Ladder code 10 Lifting cord 50 Support case 51, 51a Tilt drum 52 Winding shaft 53 Obstacle detection stop device 54 Operation Amount adjustment member 55a, 55b Case member 56 Output shaft member 57 Brake spring 58 Spring case 59 Rotation relay plate 60 Input shaft member 70 Support auxiliary member 531 Camshaft 532 Cam clutch 533 Cap

Claims (12)

In a horizontal blind that allows the slat to be raised and lowered and tilted with one drive shaft, the rotation of the take-up shaft that supports the raising and lowering cord when tension in the pulling direction does not act on the raising and lowering cord used for raising and lowering the slat. It is an obstacle detection and stopping device that prevents
With respect to the tilt drum that adjusts the angle of the slats via the ladder cord, when the slats are inverted after the slats are tilted in a predetermined direction and moved up and down, the rotation of the drive shaft is transmitted to the tilt drum. The output shaft of the delay unit, which prevents the rotation of the take-up shaft during the angle adjustment of the slats and delays the drive shaft and the take-up shaft to rotate in conjunction with each other after a predetermined relative rotation, makes it impossible to rotate relative to the output shaft. With the camshaft to be connected,
A cam clutch that moves relative to a position that makes the take-up shaft non-rotatable when the cam shaft and the take-up shaft rotate relative to each other and makes the take-up shaft non-rotatable .
An obstacle detection / stopping device, characterized in that the delay unit makes it possible to adjust the time during operation so as to prevent the rotation of the take-up shaft . The camshaft is connected to a cap that is non-rotatably attached to the take-up shaft.
The obstacle detection / stopping device according to claim 1, wherein the cam clutch is configured to be movable relative to the take-up shaft in the axial direction according to the rotation direction of the cam shaft. When the cam shaft prevents the winding shaft from rotating, the cam shaft is configured to be brought into contact with the cap by two or more protrusions provided with each other in the rotation direction. The obstacle detection / stopping device according to claim 2, which is characterized. Any of claims 1 to 3, wherein the cam clutch is configured to engage with the take-up shaft so as to move relative to the take-up shaft with rotation of the take-up shaft. The obstacle detection / stopping device described in item 1. The obstacle detection / stopping device according to any one of claims 1 to 4.
With the delay unit
Horizontal blinds characterized by being equipped with. The delay unit is
An input shaft member directly connected to the drive shaft and
An output shaft member having an output shaft portion that transmits the rotation of the input shaft member so as to be interlocked and rotated with a predetermined delay amount and engaging with the input shaft member with a play of a predetermined rotation angle.
A braking member that suppresses rotation of the output shaft member other than rotation due to rotation transmission from the input shaft member, and
A case member accommodating the input shaft member, the output shaft member, and the braking member,
The horizontal blind according to claim 5, wherein the blind is provided. The braking member is
A coiled brake spring having a pair of ends that engage a part of the output shaft member while allowing rotational transmission from the input shaft member to the output shaft member.
A spring case that accommodates the brake spring with a reduced diameter and is locked to the case member of the delay unit.
The horizontal blind according to claim 6, wherein the blind is provided. A rotary relay plate that rotates and relays with a predetermined delay amount is further provided between the input shaft member and the output shaft member, and the delay amount due to the engagement between the input shaft member and the output shaft member can be changed. The horizontal blind according to claim 6 or 7, characterized in that. The horizontal blind according to any one of claims 5 to 8, wherein the amount of rotation delayed by the delay unit is set to be equal to or greater than the angle adjustment range of the slats. The method according to any one of claims 5 to 9, wherein the support case that supports the obstacle detection / stopping device is provided with a deterrent wall that suppresses the upward movement of the cam shaft. Obstacle detection stop device. A horizontal blind that allows the slats to be raised and lowered and tilted with a single drive shaft and is equipped with an obstacle detection and stopping device.
An obstacle detection / stopping device that prevents the rotation of the take-up shaft that supports the elevating cord when tension in the pulling direction does not act on the elevating cord used for the elevating operation of the slats.
With respect to the tilt drum that adjusts the angle of the slats via the ladder cord, when the slats are inverted after the slats are tilted in a predetermined direction and moved up and down, the rotation of the drive shaft is transmitted to the tilt drum. A delay unit that prevents the rotation of the take-up shaft during the angle adjustment of the slats and delays the drive shaft and the take-up shaft so that they rotate in conjunction with each other after a predetermined relative rotation.
The obstacle detection / stopping device is
A camshaft that is non-rotatably connected to the output shaft of the delay unit,
A cam clutch that relatively moves to a position where the take-up shaft cannot rotate when the cam shaft and the take-up shaft rotate relative to each other, and makes the take-up shaft non-rotatable.
It has a cap that is non-rotatably attached to the take-up shaft.
The horizontal type is characterized in that the cam shaft is configured to be brought into contact with the cap by two or more protrusions provided with each other in the rotation direction when the rotation of the take-up shaft is prevented. blind. A horizontal blind that allows the slats to be raised and lowered and tilted with a single drive shaft and is equipped with an obstacle detection and stopping device.
An obstacle detection / stopping device that prevents the rotation of the take-up shaft that supports the elevating cord when tension in the pulling direction does not act on the elevating cord used for the elevating operation of the slats.
A working amount adjusting member capable of adjusting the amount of rotation that prevents the winding shaft from rotating by the obstacle detection / stopping device by a predetermined amount of rotation is provided.
The obstacle detection / stopping device is
A camshaft that is non-rotatably connected to the output shaft of the delay unit,
A cam clutch that relatively moves to a position where the take-up shaft cannot rotate when the cam shaft and the take-up shaft rotate relative to each other, and makes the take-up shaft non-rotatable.
It has a cap that is non-rotatably attached to the take-up shaft.
The cam shaft is configured to be brought into contact with the cap by two or more protrusions provided with each other in the rotation direction when the rotation of the take-up shaft is prevented.
A horizontal blind characterized in that the operating amount adjusting member is connected to the drive shaft so as not to rotate relative to the drive shaft.