JP2017206853A - Obstacle detection stopping device and horizontal blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an obstacle detecting stopping device for a horizontal blind having an aspect of high flexibility, and the horizontal blind that comprises the obstacle detecting stopping device and enable slats to be tilted with one drive shaft without any elevation.SOLUTION: An obstacle detecting stopping device 53 according to the present invention is applied to a horizontal blind which enables slats 4 to be elevated and tilted with one drive shaft 11. The obstacle detecting stopping device 53 comprises: a cam shaft 531 coupled to an output shaft of a predetermined delay unit 5a not to rotate relatively; and a cam clutch 532 moving relatively up to a position where a take-up shaft 52 is disabled to rotate during relative rotation of the cam shaft 531 and take-up shaft 52 to disable the take-up shaft 52 to rotate. The delay unit 5a stops the take-up shaft 52 from rotating during angle adjustment of the slats 4, and thus gives a delay such that the drive shaft 11 and take-up shaft 52 rotate associatively after rotating relatively as predetermined. The horizontal blind according to the present invention comprises the obstacle detecting stopping device 53 and the delay unit 5a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an obstacle detection / stop device in a horizontal blind, and a horizontal blind including an obstacle detection / stop device that enables a slat to be raised and lowered and tilted with a single drive shaft.

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

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

  By the way, as one type of horizontal blind, a cord that can be operated to rotate a tilt drum that suspends and supports a ladder cord with a single drive shaft, and a winding shaft that suspends and supports a lifting cord so that it can be wound or unwound. Those using a support member are generally known.

  With a general cord support member that allows the rotation of the tilt drum and the take-up shaft to be operated with one drive shaft, even if a tilt operation without raising or lowering the slat is desired, the bottom rail fluctuates up and down due to the tilt operation. End up.

  On the other hand, some cord support members in horizontal blinds are provided with an obstacle detection stop device. The obstacle detection stop device is a device for preventing the winding shaft that supports the lifting / lowering cord from rotating when the tension in the pulling direction does not act on the lifting / lowering cord. When a collision occurs, the rewinding of the lifting / lowering cord is stopped, the descent of the slat and the bottom rail is stopped, and the reverse winding of the lifting / lowering cord is prevented.

  As one type of such an obstacle detection and stop device, a cam member is provided that can move in the axial direction relative to the lifting drum, and when this cam member loses the tension of the lifting cord, the lifting drum is not allowed to rotate. There is a configuration in which the cam member is relatively moved, and when the tension of the lifting / lowering cord is restored, the cam member is relatively moved in the reverse direction to a position where the lifting / lowering drum can be rotated (for example, see Patent Document 1).

  More specifically, in the technique of Patent Document 1, in the horizontal blind, the driving required from the fully retracted state to the reverse fully closed state at least from the lifted cord unwinding amount at the lower limit position determined by the ladder cord. 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 be rotated.

  The obstacle detection and stop device configured as described above is configured to idle so as not to move the cam member to a position where the lifting drum cannot be rotated by the rotation angle when adjusting the slat angle.

JP 2005-179994 A

  As described above, in the case of a general cord support member that allows the rotation of the tilt drum and the winding shaft to be operated by one drive shaft, even if a tilt operation without raising or lowering the slat is desired, the bottom rail can be operated by the tilt operation. This raises the problem of moving up and down.

  On the other hand, as disclosed in Patent Literature 1, when the obstacle detection is stopped by the obstacle detection stop device, such as when the bottom rail is at the lower limit position, the lifting / lowering cord unwinding amount at the lower limit position determined by the ladder code Further, at least the rotation angle of the drive shaft required between the fully closed state and the reverse fully closed state of the slat is configured to idle so that the cam member does not move to a position where the winding shaft cannot be rotated. is there.

  However, with this technique, the rotational angle required to rotate is different for each horizontal blind to be applied, so it is necessary to prepare an obstacle detection / stop device suitable for the rotational angle required for angle adjustment.

  Also, in the horizontal blinds equipped with the obstacle detection stop device in these techniques, the obstacle stop device is operated after the bottom rail hits the obstacle because it rotates idle for the rotation angle when adjusting the slat angle. There was an adverse effect of delaying the time to do.

  Accordingly, the rotation of the tilt drum and the winding shaft of the slat can be operated with one drive shaft, and when the tilt operation without raising and lowering the slat is desired, the bottom rail is raised and lowered by the tilt operation. In addition to solving this problem, a technique that improves the versatility of the obstacle detection and stop device and has excellent responsiveness is desired.

  In view of the above problems, an object of the present invention is to provide an obstacle detection / stop device in a horizontal blind that has a high versatility, and the obstacle detection / stop device. An object of the present invention is to provide a horizontal blind that enables a tilt operation.

  The obstacle detection and stop device of the present invention is a horizontal blind that allows the slats to be lifted and tilted with a single drive shaft, and when the pulling direction tension does not act on the lifting cord used for the lifting and lowering operation of the slats, An obstacle detection / stop device for preventing rotation of a winding shaft that supports a lifting / lowering cord, wherein the slat is tilted in a predetermined direction with respect to a tilt drum that adjusts the angle of the slat via a ladder cord. Then, when the slat is reversed, the rotation of the drive shaft is transmitted to the tilt drum, and the rotation of the winding shaft during the angle adjustment of the slat is prevented so that the drive shaft and the winding shaft are The output shaft of the delay unit for delaying the interlocking rotation after a predetermined relative rotation, the relative rotation of the cam shaft connected to the relative rotation of the cam shaft and the winding shaft. Sometimes, characterized in that it comprises a cam clutch unrotatable the winding shaft to move relative to a position where the unrotatable the winding shaft.

  In the obstacle detection and stop device of the present invention, the cam shaft is connected to a cap that is attached to the winding shaft so as not to rotate relative to the winding shaft, and the cam clutch depends on a rotation direction of the cam shaft. It is configured to be relatively movable in the axial direction with respect to the winding shaft.

  Further, in the obstacle detection and stop device of the present invention, the cam shaft is provided with two or more protrusions provided in the rotation direction with respect to the cap when the cam clutch prevents the winding shaft from rotating. It is comprised so that it may contact | abut in a part.

  In the obstacle detection and stop device of the present invention, the cam clutch is configured to engage with the take-up shaft so as to relatively move in the axial direction with the rotation of the take-up shaft. It is characterized by.

  Furthermore, the horizontal blind according to the present invention includes the obstacle detection / stop device according to the present invention and the delay unit.

  In the horizontal blind according to the present invention, the delay unit includes an input shaft member directly connected to the drive shaft, and the output shaft that transmits the rotation of the input shaft member so as to interlock and rotate with the predetermined delay amount. And an output shaft member that engages the input shaft member with 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 And a case member that houses the input shaft member, the output shaft member, and the braking member.

  Also, in the horizontal blind according to the present invention, the braking member has a coil shape having a pair of end portions that engage with a part of the output shaft member while allowing rotation transmission from the input shaft member to the output shaft member. And a spring case that is received by reducing the diameter of the brake spring and that is engaged with the case member of the delay unit.

  The horizontal blind according to the present invention further includes a rotation relay plate that relays and rotates with a predetermined delay amount between the input shaft member and the output shaft member, and the engagement between the input shaft member and the output shaft member. It is characterized in that the delay amount due to the combination can be changed.

  In the horizontal blind according to the present invention, the amount of rotation delayed by the delay unit is set to be equal to or greater than the angle adjustment range of the slat.

  In the horizontal blind according to the present invention, the support case that supports the obstacle detection and stop device is provided with a deterring wall that inhibits the cam shaft from moving upward.

  Furthermore, the horizontal blind according to another aspect of the present invention is a horizontal blind including an obstacle detection and stop device that allows the slats to be moved up and down and tilted with a single drive shaft, and is drawn out to the lifting cord used for the lifting operation of the slats. When the tension in the direction does not act, the obstacle detection stop device that prevents rotation of the winding shaft that supports the lifting / lowering cord, and the tilt drum that adjusts the angle of the slat via a ladder cord, the slat is predetermined. When the slat is inverted after being tilted in the direction, the rotation of the drive shaft is transmitted to the tilt drum, and the rotation of the winding shaft during the angle adjustment of the slat is prevented, and the drive shaft And a delay unit that delays the winding shaft to rotate in conjunction with each other after a predetermined relative rotation. A cam shaft that is connected to the output shaft of the unit so as not to rotate relative to the output shaft, and moves relative to a position where the winding shaft cannot be rotated when the cam shaft and the winding shaft rotate relative to each other. A cam clutch that is disabled, and a cap that is attached so as not to rotate relative to the winding shaft, and the cam shaft rotates in the rotation direction with respect to the cap when the rotation of the winding shaft is prevented. It is comprised so that it may contact | abut with two or more protrusion parts provided mutually.

  Further, the horizontal blind according to another aspect of the present invention is a horizontal blind that can be moved up and down and tilted by a single drive shaft and includes an obstacle detection and stop device. An obstruction detection stop device that prevents rotation of the winding shaft that supports the lifting / lowering cord when tension in the pulling direction does not act, and a rotation amount that prevents rotation of the winding shaft by the obstacle detection stop device is predetermined. The obstacle detection stop device includes a cam shaft connected to the output shaft of the delay unit so as not to be relatively rotatable, the cam shaft, and the winding shaft. A cam clutch that moves relative to a position where the winding shaft cannot rotate when rotating relative to the shaft, and makes the winding shaft non-rotatable; and a cam clutch that is mounted so as not to rotate relative to the winding shaft. The camshaft is configured to abut against the cap at two or more protrusions provided in the rotational direction when the rotation of the winding shaft is prevented, The operation amount adjusting member is connected to the drive shaft so as not to rotate relative 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 the tilt operation without raising / lowering the slat is desired, the bottom rail moves up and down by the tilt operation. In particular, the versatility of the obstacle detection and stop device is improved and the responsiveness is excellent.

It is a front view which shows schematic structure of the horizontal blind of one Embodiment by this invention. (A), (b) is the perspective view and sectional drawing which respectively show schematic structure of the cord support apparatus which has the delay unit of Example 1 which concerns on the obstruction detection stop device of one Embodiment by this invention, respectively. It is a disassembled perspective view which shows schematic structure of the delay unit of Example 1 which concerns on the obstacle detection stop device of one Embodiment by this invention. It is a perspective view explaining the assembly | attachment method of the cord support apparatus which has a delay unit of Example 1 which concerns on the obstacle detection stop device of one Embodiment by this invention. (A), (b), (c) is a figure explaining the operation | movement regarding the delay unit of Example 1 which concerns on the obstruction detection stop device of one Embodiment by this invention, respectively. (A), (b), (c) is a schematic side view for explaining the operation of the horizontal blind when the bottom rail is in the non-lower limit position according to the obstacle detection and stop device of the embodiment of the present invention. It is. It is the disassembled perspective view seen from one direction which shows schematic structure of the obstruction detection stop device of one Embodiment by this invention. It is the disassembled perspective view seen from the other direction which shows schematic structure of the obstruction detection stop device of one Embodiment by this invention. (A), (b) is a figure which shows the operation | movement of one operation direction of the obstruction detection stop device of one Embodiment by this invention, respectively. (A), (b) is a figure which shows operation | movement of the other operation direction of the obstruction detection stop device of one Embodiment by this invention, respectively. (A) thru | or (e) is a figure which shows operation | movement before and behind the operation | movement of the obstruction detection stop device of one Embodiment by this invention, respectively. (A), (b), (c) is a schematic side view for explaining the operation of the horizontal blind when the bottom rail is in the lower limit position according to the obstacle detection and stop device of the embodiment of the present invention. is there. (A), (b) is the perspective view and sectional drawing which respectively show schematic structure of the cord support apparatus of the other example which has the delay unit of Example 1 which concerns on the obstruction detection stop device of one Embodiment by this invention, respectively. . It is a disassembled perspective view which shows schematic structure of the delay unit of Example 2 which concerns on the obstruction detection stop device of one Embodiment by this invention. It is a perspective view explaining the assembly | attachment method of the cord support apparatus of the other example which has the delay unit of Example 2 which concerns on the obstruction detection stop device of one Embodiment by this invention. It is a disassembled perspective view which shows schematic structure of the delay unit of Example 3 which concerns on the obstruction detection stop device of one Embodiment by this invention. It is a disassembled perspective view which shows schematic structure of the delay unit of Example 4 which concerns on the obstruction detection stop device of one Embodiment by this invention. (A), (b) is an operation related to the delay unit of Example 3 according to the obstacle detection / stop device of the embodiment of the present invention, and (c) is the obstacle detection / stop device of the embodiment of the present invention. It is a figure explaining the operation | movement regarding the delay unit of the Example 4 which concerns. (A), (b) is a perspective view which shows the example of the connection structure with respect to the obstruction detection stop device in the cord support apparatus regarding the delay unit of one Example by this invention, respectively. It is a disassembled perspective view which shows schematic structure of the delay unit of Example 5 by this invention. It is a perspective view explaining the assembly | attachment method of the code | cord | chord support apparatus of the modification which has a delay unit of Example 5 by this invention. It is a perspective view which shows schematic structure of the code | cord | chord support apparatus of the modification which has a delay unit of Example 5 by this invention. It is a disassembled perspective view regarding the operation amount adjustment member of one Example which concerns on the obstacle detection stop device of one Embodiment by this invention. (A), (b) is a figure which shows the operation | movement relationship of the operation amount adjustment member of one Example which concerns on the obstruction detection stop device of one Embodiment by this invention, respectively.

  Hereinafter, an example of a horizontal blind that enables a slat lifting operation by a lifting cord and a slat tilting operation by a ladder cord by rotation of one drive shaft will be described with reference to the drawings. In addition, in the present specification, with respect to the front view of the horizontal blind shown in FIG. 1, the upper and lower directions in the drawing are the upper direction (or upper side) and the lower direction (or lower side), respectively, according to the hanging direction of the slats. The left direction in the figure is defined as the left side of the horizontal blind, and the right direction in the figure is defined as the right side of the horizontal blind. Moreover, when the side which visually recognizes the front view of FIG. 1 is the front side (indoor side) and the opposite side is the rear side (or outdoor side), and is referred to as the front-rear direction of the horizontal blind, it is illustrated in the front view of FIG. The direction perpendicular to the surface.

(Configuration of horizontal blind)
FIG. 1 is a front view showing a schematic configuration of a horizontal blind according to an embodiment of the present invention. In the horizontal blind shown in FIG. 1, a cord support device 5 in which a delay unit 5 a according to the present invention is arranged in parallel with a cord support unit 5 b is provided in the head box 1, and a ladder is provided on the right end portion side in the head box 1. A cord support member 6 is provided. 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 ladder cord support members 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 slats 4 via a pair of string-like ladder cords 9 hanging down on the indoor side and the outdoor side, respectively. The bottom rail 8 is suspended and supported at the lower end of the frame. The head box 1 is fixed to a ceiling-side mounting surface via a bracket 7.

  Further, a string-like lifting / lowering cord 10 is suspended 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 lifting / lowering 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).

  For this reason, the cord support unit 5b can wind up or rewind the tilt drum 51 having the V-shaped groove for hanging the pair of ladder cords 9 hanging down on the indoor side and the outdoor side, and the elevating cord 10, respectively. An elongated cylindrical take-up shaft 52 having an inclination is arranged side by side on the square rod-like drive shaft 11 and supported by the support case 50.

  Although details will be described later, an obstacle detection / stop device 53 according to an embodiment of the present invention is provided on the leading end side of the winding shaft 52. The obstacle detection and stop device 53 is a device for preventing the winding shaft 52 that supports the lifting / lowering cord 10 from rotating when the tension in the pulling direction is not applied to the lifting / lowering cord 10. When 8 collides with an obstacle, the rewinding of the lifting / lowering cord 10 is stopped, the descent of the slat 4 and the bottom rail 8 is stopped, and the reverse winding of the lifting / lowering cord 10 is prevented.

  In particular, although details will be described later, in Example 1 according to the obstacle detection stop device 53 of the present embodiment, the cord support device 5 is connected to the drive shaft 11 so that the tilt drum 51 is not relatively rotatable. The cord support unit 5b is configured such that the take-up shaft 52 is supported by the support case 50 in a non-connected (non-engaged) manner with respect to the drive shaft 11, and the take-up shaft 52 has a predetermined resistance against rotation of the tilt drum 51. A delay unit 5a that is operated so as to rotate in association with a delay amount is arranged side by side on the drive shaft 11 with respect to the cord support unit 5b.

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

  An operation unit 2 is provided on the right end side in the head box 1. The operation unit 2 has a pulley (not shown) on which an endless string-like operation cord 3 (or an endless ball chain) can be hooked if it is a manual type shown in the figure, and is removed from the head box 1. The operation code 3 is led out to enable the drive shaft 11 to be rotated.

  Alternatively, when the operation unit 2 is of an electric type, it can be an electric motor that can rotate the drive shaft 11 based on an operation signal from the outside. Therefore, the configuration of the operation unit 2 can be any configuration as long as it can be transmitted to the rotation of the drive shaft 11 in accordance with the operation by the operator.

  Therefore, the horizontal blind shown in FIG. 1 operates the operation cord 3 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 as the drive shaft 11 rotates. By rotating the drum 51a, a tilt operation for adjusting the angle of the slat 4 is possible. When the drive shaft 11 is rotated more than the rotation required for the tilt operation, the winding unit 52 in the cord support device 5 causes a predetermined delay amount 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 moved up and down to move up and down. In particular, the obstacle detection and stop device 53 with the delay unit 5a that allows the tilt operation without raising and lowering the slat 4 with one drive shaft 11 is configured in a highly versatile manner.

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

Example 1
2A and 2B are a perspective view and a cross-sectional view showing a schematic configuration of the cord support device 5 having the delay unit 5a of Example 1 according to the obstacle detection stop device 53 of one embodiment of the present invention, respectively. It is. FIG. 3 is an exploded perspective view showing a schematic configuration of the delay unit 5a of Example 1 according to the obstacle detection and stop device 53 of one embodiment of the present invention. FIG. 4 is a perspective view for explaining a method of assembling the cord support device 5 having the delay unit 5a of Example 1 according to the obstacle detection and stop device 53 of one embodiment of the present invention.

  The code support device 5 shown in FIG. 2A is configured by arranging a delay unit 5a in parallel with the code support unit 5b. The cord support unit 5b supports the tilt drum 51 and the take-up shaft 52 in a rotatable manner by the support case 50 with the drive shaft 11 as a rotation axis. The ladder cord 9 (see FIG. 1) to be suspended from the tilt drum 51 and the lifting / lowering cord 10 (see FIG. 1) to be suspended from the take-up shaft 52 are provided on the bottom surface of the support case 50. Derived from the outlet 50a.

  As shown in FIG. 2B, the tilt drum 51 is supported by the support case 50 so as not to rotate relative to the drive shaft 11. On the other hand, the take-up shaft 52 is supported by the support case 50 so as not to be connected (not engaged) to the drive shaft 11. In addition, an obstacle detection stop device 53 is provided on the leading end side of the winding shaft 52 to prevent the winding shaft 52 that supports the lifting / lowering cord 10 from rotating when tension in the pulling direction does not act on the lifting / lowering cord 10. However, the obstacle detection and stop device 53 is also supported by the support case 50 so as not to be connected (not engaged) to the drive shaft 11. The case main body of the obstacle detection / stop device 53 is fixed to the distal end side of the take-up shaft 52, but the cylindrical cam shaft 531 accommodated in the case main body of the obstacle detection / stop device 53 is moved down the slat 4. When the bottom rail 8 collides with an obstacle, the play required to stop the rewinding of the lifting / lowering cord 10 and stop the descent of the slat 4 and the bottom rail 8 (that is, a rotation amount for preventing the rotation of the winding shaft 52 described later). θ), and can rotate together with the rotation of the winding shaft 52.

  As shown in FIG. 3, the delay unit 5a arranged in parallel 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 rotation relay plate 59, and an input shaft member. 60 and case members 55a and 55b.

  The output shaft member 56 protrudes through an outer hexagonal cylindrical shaft portion 561 and a flange 567 in which a cylindrical shaft portion 568 is formed on the proximal end side (drive transmission input side) of the shaft portion 561. A projecting portion 564 that projects toward the drive transmission input side within a range of a predetermined angle (angle α1 described later) from the center of the shaft 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 supported so as to be relatively rotatable by a circular opening 559c and an 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 protruding portion 564 are formed so as to protrude in a continuous shape, but the cylindrical shaft 562 and the protruding portion 564 may be protruded individually. A recessed area excluding the protruding portion 564 on the outer periphery of the cylindrical shaft 562 is formed as an engagement receiving portion 563 that becomes a movable area of a protruding piece 592 of the rotation relay plate 59 described later. The shaft portion 561 and the cylindrical shaft 562 are formed with shaft holes 565 into which the drive shaft 11 can be inserted without being engaged. The outer hexagonal cylindrical shaft portion 561 is engageable with the cylindrical cam shaft 531 having the hexagonal shaft hole 531a of the obstacle detection and stop device 53 so as to be integrally rotatable (FIG. 4). 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 and stop device 53 (see FIG. 2B).

  The brake spring 57 and the spring case 58 function as a braking member that suppresses 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 applied to the rotation of the output shaft member 56 transmitted from the cam shaft 531 of the obstacle detection / stop device 53. That is, the braking member composed of 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 slat 4 and the bottom rail 8 from dropping their weight.

  In order to stably maintain the raising / lowering position of the slat 4, the pair of end portions 571 of the coiled brake spring 57 is provided with an output shaft so that the winding shaft 52 is not moved except during the raising / lowering operation. The protrusions 564 of the member 56 are fitted so as to engage with both sides. The spring case 58 accommodates the coiled brake spring 57 in a reduced diameter state, so that the brake spring 57 can always rotate relative to the spring case 58 by pressing the inner peripheral surface of the spring case 58. However, a 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 projections 557 provided in each of the case members 55a and 55b, and each of the case members 55a and 55b is accommodated. The spring case 58 is fixed so as not to rotate because it is fitted to the portion 556.

  The rotation relay plate 59 is formed of a substantially cylindrical member having an outer shape substantially the same as the diameter of the brake spring 57 housed in a reduced diameter in the spring case 58, 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 in a non-engagement manner. The rotation relay plate 59 is generally formed of a cylindrical member. More specifically, the rotation relay plate 59 has a predetermined angle (an angle α2 to be described later) on the front end surface of the rotation relay plate 59 at a position near the periphery of the rotation relay plate 59. A protruding piece 592 that protrudes within the range is provided. In a state where the distal end surface of the rotation relay plate 59 is disposed so as to be in contact with the base end surface of the output shaft member 56 through the inside of the brake spring 57 (see FIG. 2B), the rotation relay plate 59 is connected to the case member. It accommodates in each accommodating part 555 of 55a, 55b so that relative rotation is possible. Therefore, the protrusion piece 592 on the front end surface side of the rotation relay plate 59 can be relatively rotated within the range of the engagement receiving portion 563 in the recessed area excluding the protrusion portion 564 of 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 protruding piece 592 comes into contact with the protruding portion 564 of the output shaft member 56 via the end 571 of the brake spring 57. After the contact, the rotation of the rotation relay plate 59 is transmitted to the output shaft member 56.

  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 in a range of a predetermined angle (an angle α3 described later) from the axial center of the shaft hole 591. In this example, the groove-shaped engagement receiving portion 593 is formed so as to form the rotation receiving portion 594. However, the groove-shaped engagement receiving portion 593 may not be formed as long as the same function is applied.

  The input shaft member 60 has a cylindrical shaft portion 601 having a substantially square hole 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. Thus, a protruding piece 603 protruding alongside the shaft portion 601 is formed through a flange 604 in which a cylindrical shaft portion 606 is formed. With the drive transmission output side surface of the flange 604 of the input shaft member 60 disposed so as to be able to contact the drive transmission input side surface of the rotation relay plate 59 (see FIG. 2B), the shaft portion 606 of the input shaft member 60 and The flange 604 is supported by the circular opening 559d and the accommodating portion 555 at the end portions on the drive transmission input side of the case members 55a and 55b, respectively, so as to be relatively rotatable. The shaft portion 601 can support the shaft hole 565 of the output shaft member 56 and the shaft hole 591 of the rotation relay plate 59.

  Therefore, the protruding piece 603 of the input shaft member 60 can be relatively rotated within the range of the engagement receiving portion 593 of the rotation relay plate 59, that is, the input shaft member 60 directly connected to the drive shaft 11 is rotated. Even so, the rotation is not transmitted to the rotation relay plate 59 until the protruding piece 603 comes into contact with the rotation receiving portion 594 of the rotation relay plate 59. However, 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, the delay unit 5 a according to the first embodiment is configured so that the amount of delay 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 transmitted to the output shaft member 56. And a delay amount obtained by adding up the delay amounts between the output shaft member 56 and the output shaft member 56.

  For example, as shown in FIG. 5A, the amount of delay between the rotation relay plate 59 and the output shaft member 56 is a protrusion 564 protruding in the range of the angle α1 and a protrusion piece 592 protruding in the range of the angle α2. And the delay amount β. 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 such that the rotation receiving portion 594 in the range of the angle α3 and the protruding piece 603 protruding in the range of the angle α4. , The delay amount 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. It functions as a delay adjustment member.

  Of the constituent members of the delay unit 5a of the first embodiment, only the input shaft member 60 is connected directly to the drive shaft 11 and the delay unit 5a of the first embodiment is arranged on the drive shaft 11 side by side. It is possible to perform the interlocking rotation with a predetermined delay amount relative to the rotation of the tilt drum 51 with respect to the rotation of the winding shaft 52 via the obstacle detection / stop device 53 (FIGS. 4 and 2B). reference).

  In particular, as shown in FIG. 4, the claw portions 558 that are gripped by the protrusions 50b provided on the support case 50 of the cord support unit 5b are driven in the case portions 55a and 55b of the delay unit 5a of the first embodiment. Each is formed on the side wall portion on the transmission output side. As a result, the delay unit 5a according to 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 cam shaft 531 of the obstacle detection and stop device 53 and is connected so as to be integrally rotatable. If an excessive load is applied to the rotation of the drive shaft 11 in spite of the operation of 53, an undesired force for the obstacle detection / stop device 53 to come off from the support case 50 acts, thereby separating the connected state. Since an undesired force acts in the direction, it can cause a failure. Therefore, in order to relieve an undesired force that separates the connected state due to such an excessive load, a restraining wall 50j that restrains the cam case 531 from moving upward as shown in FIG. Is preferably provided.

  As will be described later as the second embodiment, the rotation relay plate 59 is omitted, and 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 reduced. 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 delay amount between the input shaft member 60 and the output shaft member 56 when the rotation relay plate 59 is not used is the angle between the protrusion 564 protruding in the range of the angle α1 and the angle. The delay amount η is between the protruding piece 603 protruding in the range of α4. For example, if α1≈60 degrees and α4≈60 degrees, the delay amount η≈240 degrees. Accordingly, 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.

  Furthermore, the rotation relay plate 59 is changed by preparing the rotation relay plate 59 that changes the shape of the protrusion piece 592 (angle α2) or the shape of the rotation receiving portion 594 (angle α3) to generate multiple types of delay amounts. It is also possible to realize many kinds of delay amounts only.

  The case members 55a and 55b fit the output shaft member 56, the brake spring 57, the spring case 58, the rotation 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 be accommodated. More specifically, fitting receiving portions 551 having protrusions 553 are formed on the upper and lower surfaces of the case member 55a, respectively, and holes that can be fitted with the protruding portions 553 are formed on the upper and lower surfaces of the case member 55b. A fitting piece 552 that has 554 and engages with the fitting receiving portion 551 is formed. That is, when forming a case by using two case members to form a case, if the fitting is formed in a parallel direction to the drive shaft 11, the fitting force is weakened by the rotation of the drive shaft 11, and there is a problem in quality. Therefore, it is necessary to form a unit using a screw or the like. However, as shown in the present embodiment, it is configured to be fitted to the drive shaft 11 in the vertical direction so that the drive shaft 11 is strongly fitted against the rotation. Since it has a resultant force, it is not necessary to form a unit such as a screw, which contributes to comprehensive ease of assembly and cost reduction.

  In the present embodiment, the example in which the shaft portion 561 of the output shaft member 56 and the cam shaft 531 of the obstacle detection and stop device 53 are engaged in a hexagonal shape has been described. It is preferable that the engagement shape is a side. That is, the shaft portion 561 of the output shaft member 56 is configured to have a polygonal shape, and the cam shaft 531 of the obstacle detection and stop device 53 is configured to engage with the shaft portion 561, so that the output shaft member 56 can be assembled with a slight rotational operation. , The assemblability improves.

  If 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 winding shaft 52 can be operated by one drive shaft 11. Although it is configured, if a tilt operation without raising / lowering the slat 4 is desired, the bottom rail 8 is not raised / lowered by the tilt operation. Further, when the bottom rail 8 is not at the lower limit position, the operability of tilting after the folding portion of the slat 4 is raised during the tilt operation is not impaired.

  For example, when a predetermined number of horizontal slats 4 are folded into the bottom rail 8 as shown in FIG. 6 (a), the angle of the slats 4 is adjusted by a tilt operation as shown in FIG. 6 (b). Even so, the bottom rail 8 does not move up and down. Further, as shown in FIG. 6 (c), the operability of tilting after the folding 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 square recess. Therefore, when the delay unit 5a is installed in each head box 1, the upper corner portion 550a of the delay unit 5a supported by the lower corner portion 550b is engaged with the upper end of the head box 1 (see FIG. 6). Backlash in the front-rear direction and the up-down direction can be suppressed. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, by holding the cord support unit 5b against the protrusion 50b of the support case 50, the rattling in the left-right direction is also suppressed. Is done.

(Configuration of obstacle detection stop device)
Next, the obstacle detection stop device 53 according to an embodiment of the present invention will be described in detail. 7 and 8 are exploded perspective views showing a schematic configuration of the obstacle detection / stopping device 53 according to the embodiment of the present invention as seen from different directions. FIGS. 9A and 9B and FIGS. 10A and 10B are diagrams showing the operation in the respective operation directions showing the schematic configuration of the obstacle detection stop device 53 of this embodiment. .

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

  The cam shaft 531 is formed of three-stage cylindrical portions 5310, 5311, and 5312 that are connected in steps with different diameters from the drive transmission input side to the drive transmission output side in different diameter directions. The cylindrical 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 and is engageable so as to be integrally rotatable. In the illustrated example, the shaft hole 531a is a hexagonal shaft hole that can be engaged with the outer hexagonal cylindrical shaft portion 561 so as to be integrally rotatable. Further, the drive shaft 11 can be inserted into the shaft hole 531a and the shaft holes 5313 inside the cylindrical portions 5311 and 5312 without being engaged.

  In addition, a pair of protrusions 5314 are axisymmetrically formed at the step portion where the cylindrical portion 5310 and the cylindrical portion 5311 are continuous. Further, on the cylindrical portion 5310 in the vicinity of the stepped portion, a sliding protrusion 5315 that protrudes outward at a position orthogonal to the pair of protrusions 5314 is formed. The sliding protrusion 5315 is bent on the cylindrical 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 cylindrical portion 5310. Formed on the section.

  7 and 8 show a part thereof, but on the cylindrical portion 5311 in the vicinity of the stepped portion where the cylindrical portion 5311 and the cylindrical portion 5312 are connected, equidistant from the center of the axis by approximately 120 degrees. Thus, protrusions 5316 are formed at three locations. The three projecting portions 5316 are relative to each other within a predetermined angle range (angle θ shown in FIGS. 9 and 10) when the cylindrical portion 5310 of the cam shaft 531 is assembled in the cap 533. It is a site | part engaged with the protrusion wall 5332 in the cap 533 so that it may hold | maintain so that rotation is possible.

  As shown in FIG. 8, one protrusion 5318 is also provided at a step portion where the cylindrical part 5311 and the cylindrical part 5312 are continuous with each other so as to face the position of the sliding protrusion 5315 described above. However, the protrusion 5318 can adjust the amount of rotation by which an obstacle detection stop device 53 prevents the winding shaft 52 from rotating by a predetermined amount of rotation by an operation amount adjusting member 54 described later. Although it is not always necessary to use an external delay unit 5a for the take-up shaft 52 as shown in FIG. 3, it is not necessarily provided, but an obstacle is detected inside the take-up shaft 52 as will be described later. Even when the operation amount adjusting member 54 connected to the stop device 53 is provided, it can be used to enhance versatility. 7 and 8, an engaging groove 5317 is formed in the vicinity of the end portion on the drive transmission output side of the cylindrical portion 5312. This engaging groove 5317 is also described in an embodiment described later. Although it is a site | part which acts by 6, it is the meaning which raises versatility similarly.

  The cam clutch 532 has a cylindrical shape, and its inner peripheral surface 5321 faces the cylindrical portion 5310 of the cam shaft 531 and is relatively within a predetermined angle range (angle θ shown in FIGS. 9 and 10). It is assembled so that it can rotate. The cam clutch 532 is provided with a sliding hole 5322 that obliquely penetrates on the circumferential surface over the predetermined angle range, and the sliding hole 5322 that obliquely penetrates on the circumferential surface is a cylinder of the cam shaft 531. It engages with a sliding projection 5315 provided on the shaped portion 5310. Thus, the cam clutch 532 is linearly moved relative to the cap 533 in accordance 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 relative linear movement with respect to the cap 533, the cam clutch 532 is accommodated in the accommodating portion 5330 of the cap 533, and the cam clutch 532 is located at a position facing the sliding hole 5322 from the axial center. The two guide recesses 5324 are formed to extend in the axial direction on the drive transmission input side from the end portion on the drive transmission output side, and the two guide recesses 5324 engage with the two guide projections 5333 of the cap 533. .

  The cam clutch 532 is a brake 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 shaft center. A nail 5323 is formed. The braking claw 5323 appears outward from the cap 533 when the cam clutch 532 linearly moves in a direction relatively away from the cap 533, and the braking claw 5323 outwards from the cap 533. When it appears, the braking claw 5323 comes into contact with a braking projection 50h provided on the support case 50 of the cord support unit 5b. When the braking claw 5323 comes into contact with the braking protrusion 50h of the support case 50, the cam clutch 532 is unable to rotate relative to the support case 50, and the cap 533 that is covered with the winding shaft 52 so as not to rotate relatively is also supported. Since the rotation relative to the case 50 is impossible (that is, the obstacle detection operation state), the rotation of the winding shaft 52 is restricted. On the other hand, when the cam clutch 532 linearly moves in a direction relatively approaching from 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 will be in the state of non-contact with the brake projection part 50h made. Therefore, the rotation of the winding shaft 11 is not limited in a state where the braking claw 5323 and the braking protrusion 50h are not in contact with each other (that is, the obstacle detection operation release state).

  The cap 533 is formed of a substantially cylindrical member having two stages of receiving portions 5330 and 5331 that are connected in steps with different diameters in the diameter reducing direction from the drive transmission input side to the drive transmission output side. The accommodating portion 5330 accommodates the cylindrical portion 5310 of the cam shaft 531 in a relatively rotatable manner in a state where the cam clutch 532 is assembled to the cam shaft 531 from the drive transmission input side. Two guide convex portions 5333 formed on the inner peripheral surface of the housing portion 5330 engage with the two guide concave portions 5324 in the cam clutch 532 so as to enable the straight movement. The accommodating portion 5331 accommodates the cylindrical portion 5312 of the cam shaft 531 with a gap corresponding to the thickness of the protruding portion 5318 acting in Example 6 described later so as to be relatively rotatable.

  A protruding wall 5332 that protrudes slightly in the diameter-reducing direction is formed in the stepped portion where the accommodating portions 5330 and 5331 are continuous, and a protruding piece 5335 that protrudes slightly in the axial direction on the drive transmission input side is connected to the protruding wall 5332. It is formed in an annular shape. The protruding wall 5332 can assemble the cam shaft 531 to the cap 533 by engaging the protruding portions 5316 at three locations with the protruding wall 5332. Thus, the cylindrical 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 in a predetermined angle range (angle θ shown in FIGS. 9 and 10).

  Further, on the protruding piece 5335, a pair of protrusions 5334 that protrude further partially toward the drive transmission input side are formed symmetrically with respect to the axis. One of the pair of protrusions 5334 is located between the two guide protrusions 5333. 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 cylindrical portion 5310 of the cam shaft 531 is stored in the storage portion 5330. Therefore, the rotation of the cam shaft 531 is transmitted to the rotation of the cap 533 while maintaining one side of each of the pair of projections 5334 in contact with one side of each of the pair of projections 5314 of the cam shaft 531. When the rotation of the cam shaft 531 turns in the opposite direction from this contact state, until the other side of each of the pair of projections 5334 contacts the other side of each of the pair of projections 5314 of the cam shaft 531 , The rotation of the cap 533 is not transmitted. 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) related to the linear motion relative to the cap 533 of the cam clutch 532 (details will be described later).

  An end portion on the drive transmission output side of the cap 533 is formed in a flange shape, and an index 5339 indicating the direction of the cap 533 is formed in a part of the cap 533, and is used for alignment at the time of incorporation. Further, as shown in FIG. 8, the end face of the cap 533 on the drive transmission output side engages with a pair of grooves 521 provided at the end of the take-up shaft 52 so as not to be relatively rotatable. A pair of protruding pieces 5336 protruding to the output side is formed. Further, a box-shaped cord attachment portion 5338 that protrudes toward the drive transmission output side is formed on the surface of the end portion on the drive transmission output side of the cap 533 in a positional relationship orthogonal to the pair of protruding pieces 5336. . One end of the lifting / lowering cord 10 that can be wound or unwound by the winding shaft 52 is inserted into an insertion hole 5337 provided in a part of the cord attaching portion 5338, and the cord attaching portion 5338 is connected by a knotted ball. Locked inside.

  As described above, the obstacle detection stop device 53 according to the present embodiment is connected to the cap 533 that is attached to the winding shaft 11 so as not to rotate relative to the winding shaft 11 and to the cap 533 with a rotation amount that prevents the winding shaft 11 from rotating. And a cam clutch 532 that can move in the axial direction relative to the take-up shaft 11 in accordance with the rotation direction of the cam shaft 531. The cam shaft 531 rotates the take-up shaft 11. When blocking, the cap 533 is configured to come into contact with two or more protrusions 5314 and 6334 provided in the rotational direction.

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

  First, referring to FIG. 9 and FIG. 10, FIG. 9A and FIG. 10A are views showing the relationship between the cam shaft 531, the cam clutch 532, and the cap 533 viewed from the axial direction. FIGS. 9B and 10B are views mainly showing the relationship between the cam shaft 531 and the cam clutch 532 as viewed from the front.

  In FIG. 9A, when the lifting / lowering cord 10 is wound by the winding shaft 11, each side of the pair of protrusions 5334 is in contact with one side of each of the pair of protrusions 5314 of the cam shaft 531. The state in which the rotation of the cam shaft 531 is transmitted to the rotation of the cap 533 while maintaining the above is shown. 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. It moves linearly in a direction relatively approaching from the cap 533 and the braking claw 5323 is accommodated in the cap 533. For this reason, the braking claw 5323 is not in contact with the braking projection 50h provided on the support case 50 (in FIG. 9B, it is simply indicated by a two-dot broken line for easy understanding). . Therefore, the rotation of the winding shaft 11 is not limited in a state where the braking claw 5323 and the braking protrusion 50h are not in contact with each other (that is, the obstacle detection operation release state).

  Here, referring to FIG. 11, the winding shaft 11 shown in FIGS. 9A and 9B turns from the state in which the lifting / lowering cord 10 is wound to the state in which the lifting / lowering cord 10 is rewound. Consider a state where the bottom rail 8 is lowered. At this time, 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, the lifting / lowering cord 10 wound around the winding shaft 11 is tensioned in the pulling direction due to the weight of the bottom rail 8 and the like, and is wound along with the rotation of the cam shaft 531. The spindle 11 rotates by its own weight (see FIG. 11A). When the bottom rail 8 collides with an obstacle, the tension in the pulling direction of the lifting / lowering cord 10 is lost, and the rotation of the winding shaft 11 is temporarily stopped, but the cam shaft 531 is still rotating (FIG. 11B). )reference).

  Then, the other side of each of the pair of projections 5334 in the cap 533 comes into contact with the other side of each of the pair of projections 5314 of the cam shaft 531 (see FIG. 10A), and the winding shaft 11 Follows the rotation of the camshaft 531 (see FIG. 11C). At this time, the cam clutch 532 moves linearly in a direction relatively away from the cap 533 and appears outward from the cap 533. When the braking claw 5323 comes into contact with the braking projection 50h provided on the support case 50 (in FIG. 10 (b), it is simply indicated by a two-dot broken line), the cam clutch Reference numeral 532 is incapable of relative rotation with respect to the support case 50, and the cap 533, which is covered with the winding shaft 52 so as to be incapable of relative rotation, is also in a state incapable of relative rotation with respect to the support case 50 (ie, an obstacle detection operation state). For this reason, the rotation of the winding 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 in spite of the operation of the obstacle detection stop device 53, the obstacle detection stop device 53 comes off from the support case 50. An undesired force is exerted and an undesired force is exerted in the direction of separating the connected state, which may cause a failure. Therefore, in order to relieve an undesired force that separates the connection state due to such an excessive load, the upward movement of the cam shaft 531 is suppressed in the support case 50 as shown in FIG. It is preferable to provide a restraining wall 50j.

  In summary, the angle from when the bottom rail 8 collides with the obstacle until the obstacle detection operation state is established is regulated to be within the angle θ at the maximum. Since the angle θ is a rotation range until each of the pair of protrusions 5334 and each of the pair of protrusions 5314 of the cam shaft 531 come into contact with each other, the adjustment of the angle range is performed by the width of these protrusions 5314 and 5334. Although it is possible, 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 slat 4 may be adjusted by a tilt operation as shown in 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. Accordingly, a large gap is not generated at the lower end of the bottom rail 8 by the tilt operation.

  In FIG. 10, the pair of protrusions 5334 and the pair of protrusions 5314 are configured to have an angle range θ ≦ 180 degrees, so that the obstacle detection is performed after the bottom rail 8 collides with the obstacle. Even when the obstacle detection stop device 53 is operating, even if an excessive load is applied to the rotation of the drive 11, the undesired force is dispersed. This is advantageous in that it is difficult to break down.

(Example 2)
Next, the cord support device 5 having the delay unit 5a of Example 2 according to the obstacle detection / stop device 53 of the present embodiment will be described. FIGS. 13A and 13B are a perspective view and a cross-sectional view showing a schematic configuration of the cord support device 5 having the delay unit 5a according to the second embodiment of the present invention. FIG. 14 is an exploded perspective view showing a schematic configuration of the delay unit 5a according to the second embodiment of the present invention. FIG. 15 is a perspective view for explaining 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, components having the same functions as those in the first embodiment are denoted by the same reference numerals.

  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. Similarly to the first embodiment, the cord support unit 5b according to the second embodiment supports the tilt drum 51 and the winding shaft 52 in a rotatable manner by using the support case 50 with the drive shaft 11 as a rotation axis. The ladder cord 9 to be suspended from the tilt drum 51 and the lifting / lowering cord 10 to be suspended from the take-up shaft 52 are led out from a lead-out port 50 a provided on the bottom surface of the support case 50.

  However, the winding shaft 52 in the cord support unit 5b of the second embodiment can be wound or unwound by multilayer winding of the tape-shaped lifting cord 10, and the tilt drum 51 has a suspension member 511 by a torsion coil spring. The ladder cord 9 is suspended and supported. Such a configuration of the cord support unit 5b is suitable for a horizontal blind that requires downsizing.

  The suspension member 511 is bent at both ends of the torsion coil spring to form a looped ladder cord attaching 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 attaching portion 511a and supported by being suspended. The suspension member 511 is attached by tightening the tilt drum 51, and rotates integrally with the tilt drum 51 until the engagement end portion 511b contacts the wall portion formed on the support case 50. When the end portion 511 b comes into contact with the wall portion formed in the support case 50, the tightening force is weakened and the idle drum rotates idly. Therefore, the angle of each slat 4 is adjusted in the same phase via the ladder cord 9 based on the rotation of the tilt drum 51.

  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 is used in order to make use of the intention to reduce the size. 5a is configured as shown in FIG.

  Referring to FIG. 14, the delay unit 5a of the second embodiment is obtained by omitting the rotation relay plate 59 and reducing the 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 are shared with the first embodiment.

  Further, the shape of the case members 55a and 55b is also omitted in comparison with the first embodiment, and the shaft portion 606 and the flange 604 of the input shaft member 60 are formed in the case. Except that the members 55a and 55b are supported so as to be relatively rotatable at the circular opening 559d and the opening side surface 559b at the end of the drive transmission input side of the members 55a and 55b, and contribute to downsizing, the same effects as the first embodiment Produce.

  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 works, and the same output shaft member 56, brake spring 57, spring case 58, and input shaft member 60 as those in the first embodiment are shared, and different delay amounts are generated.

  For example, as described above with reference to FIG. 5C, the delay amount between the input shaft member 60 and the output shaft member 56 when the rotation relay plate 59 is not used is a protrusion protruding within the range of the angle α1. There is a delay amount η between the portion 564 and the protruding 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. Accordingly, 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.

  Also in the second embodiment, as shown in FIG. 13B, the tilt drum 51 is supported by the support case 50 so as not to rotate relative to the drive shaft 11. On the other hand, the take-up shaft 52 is supported by the support case 50 so as not to be connected (not engaged) to the drive shaft 11. In addition, an obstacle detection stop device 53 is provided on the front end side of the winding shaft 52 to prevent rotation of the winding shaft 52 that supports the lifting / lowering cord 10 when tension in the pulling direction does not act on the lifting / lowering cord 10. However, the obstacle detection and stop device 53 is also supported by the support case 50 in a non-coupled (non-engaged) manner with respect to the drive shaft 11. The case main body of the obstacle detection / stop device 53 is fixed to the distal end side of the take-up shaft 52, but the cylindrical cam shaft 531 accommodated in the case main body of the obstacle detection / stop device 53 is moved down the slat 4. When the bottom rail 8 collides with an obstacle, the rewinding of the lifting / lowering cord 10 is stopped, the descent of the slat 4 and the bottom rail 8 is stopped, and the play necessary for preventing the reverse winding of the lifting / lowering cord 10 is provided. The winding shaft 52 can rotate integrally with the winding shaft 52.

  In the delay unit 5a of the second embodiment, only the input shaft member 60 is directly connected to the drive shaft 11 to rotate, and the delay unit 5a of the second embodiment is simply arranged on the drive shaft 11 in parallel. The rotation of the winding shaft 52 can be interlocked and rotated with a predetermined delay amount relative to the rotation of the tilt drum 51 with respect to the rotation of the winding shaft 52 via the obstacle detection stop device 53.

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

  Further, in the second embodiment, the case members 55a and 55b are configured to be fitted and formed in the vertical direction with respect to the drive shaft 11. Since the case members 55a and 55b have a strong fitting force with respect to the rotation of the drive shaft 11, the case members 55a and 55b are combined. There is no need for formation, and this contributes to easy assembly and low cost.

  Furthermore, as shown in FIG. 14, also in the second embodiment, the case members 55a and 55b are formed with upper corner portions 550a having a square recess. Therefore, when the delay unit 5a is installed in each 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). ), The back-and-forth and up-and-down play can be suppressed. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, by holding the cord support unit 5b against the protrusion 50b of the support case 50, the rattling in the left-right direction is also suppressed. Is done.

  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 and stop device 53 is configured to engage with the shaft portion 561, so that the rotation can be performed with a slight rotational operation. It can be assembled and its assemblability is improved.

  And if it is a horizontal blind to which the code | cord | chord support apparatus 5 which has the delay unit 5a of Example 2 is applied, it will comprise so that rotation of the tilt drum 51 and the winding shaft 52 can be operated with one drive shaft 11. FIG. Even in this case, if a tilt operation without raising / lowering the slat 4 is desired, the bottom rail 8 will not be raised / lowered by the tilt operation. Further, when the bottom rail 8 is not at the lower limit position, the operability of tilting after the folding portion of the slat 4 is raised during the tilt operation is not impaired.

  In the present embodiment, the example in which the shaft portion 561 of the output shaft member 56 is engaged with the cam shaft 531 of the obstacle detection and stop device 53 has been described. However, the winding shaft is not provided via the obstacle detection and stop device 53. Even in the case of engaging with 52, the action and effect according to the present invention can be exhibited.

[Other Examples]
In the delay unit 5a of the first and second embodiments described above, the cord support device 5 is configured to be arranged in parallel outside the various support cases 50 to improve the assembling property, and the code support device 5 can be downsized. He explained that it would be excellent in practicality that contributes to versatility, reduction of parts management burden, and cost reduction. In particular, between the delay units 5a of the first and second embodiments, it was intended to increase the number of shared members as much as possible, with emphasis on contributing to the reduction of parts management burden and cost reduction.

  The enlargement of the cord support device 5 in the front-rear direction or the up-down direction is accompanied by the enlargement of the shielding device itself. In this respect, the delay unit 5a of the first and second embodiments can avoid the enlargement and is effective. This produces a variety of 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. As compared with the delay unit 5a of Example 2, the case members 55a and 55b are configured to be larger in the left-right direction. For this reason, for example, when the installation margin in the head box 1 is not sufficient, there is a demand for reducing the lateral width of the case members 55a and 55b in the delay unit 5a of the first embodiment.

  Thus, Embodiments 3 and 4 will be described in order as a configuration example in which emphasis is placed on reducing the size of the delay unit 5a itself in the left-right direction rather than contributing to reducing the parts management burden and reducing the cost. To do. In general, in the first and second embodiments, a rotation transmission portion that generates a predetermined delay amount in the axial direction of the drive shaft 11 is associated with the drive shaft 11. By configuring the rotation transmission parts that cause the predetermined delay amount in the vertical direction to be linked, the widths of the case members 55a and 55b in the delay unit 5a of the third and fourth embodiments are made smaller. .

(Example 3)
FIG. 16 is an exploded perspective view showing a schematic configuration of the delay unit of Example 3 according to the obstacle detection and stop device 53 of one embodiment of the present invention. In addition, the same reference number is attached | subjected to the component which has the same function as Example 1 mentioned above. As shown in FIG. 16, the delay unit 5a of the present embodiment includes an output shaft member 56, a brake spring 57, a spring case 58, a rotation relay plate 59, and an input shaft member, as in the first embodiment. 60 and case members 55a and 55b.

  The output shaft member 56 in this embodiment includes an outer octagonal cylindrical shaft portion 561 and a flange 567 in which a cylindrical shaft portion 568 is formed on the base end side (drive transmission input side) of the shaft portion 561. In the vicinity of a part of the outer periphery, a projection 564 that projects from the center of the shaft to the drive transmission input side within a range of a predetermined angle (an angle α1 described later) is provided. The shaft portion 568 and the flange 567 of the output shaft member 56 are supported by a circular opening 559c and an opening side surface 559a on one opening side surface 559a (drive transmission output side) of the case members 55a and 55b, respectively, so as to be relatively rotatable. The In the output shaft member 56 in this embodiment, engagement receiving portions 563a and 563b that are recessed in steps are formed on the base end side (drive transmission input side) of the flange 567. The shaft portion 561 is formed with a shaft hole 565 into which the drive shaft 11 can be inserted without being engaged. The outer octagonal cylindrical shaft portion 561 is engageable with the cylindrical cam shaft 531 having the octagonal shaft hole 531a of the obstacle detection and stop device 53 so as to be integrally rotatable. The rotation of the member 56 can be transmitted so as to rotate in synchronization with the cam shaft 531 of the obstacle detection and stop 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 rotation relay plate 59 of the present embodiment described later in the inside thereof. , 2 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 actuated against the rotation of the output shaft member 56 transmitted from the cam shaft 531 of the obstacle detection / stop device 53. In order to stably maintain the raising / lowering position of the slat 4, the pair of end portions 571 of the coiled brake spring 57 is provided with an output shaft so that the winding shaft 52 is not moved except during the raising / lowering operation. The protrusions 564 of the member 56 are fitted so as to engage with both sides. The spring case 58 accommodates the coiled brake spring 57 in a reduced diameter state, so that the brake spring 57 can always rotate relative to the spring case 58 by pressing the inner peripheral surface of the spring case 58. However, a 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 projections 557 provided in each of the case members 55a and 55b, and each of the case members 55a and 55b is accommodated. The spring case 58 is fixed so as not to rotate because it is fitted to the portion 556.

  The rotation relay plate 59 of this embodiment is greatly different from that of the first embodiment described above. The rotation relay plate 59 of this embodiment has a smaller outer shape than the diameter of the brake spring 57 housed in a reduced diameter in the spring case 58 and has a protrusion 592a on a part of its outer peripheral surface, and an inner peripheral surface. A shaft hole 591 is formed of a substantially cylindrical member having a rotation receiving portion 594 in a part on the upper side, and has substantially the same diameter as the shaft hole 565 of the output shaft member 56. Therefore, the shaft hole 591 can be inserted through the drive shaft 11 in a non-engagement manner. The drive transmission output side surface of the rotation relay plate 59 has a shape capable of coming into contact with the engagement receiving portions 563a and 563b on the drive transmission input side surface of the output shaft member 56 through the inside of the brake spring 57. In this state, the rotation relay plate 59 is positioned inside the brake spring 57 housed in a reduced diameter in the spring case 58 and is accommodated so as to be rotatable relative to the case members 55a and 55b. For this reason, 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 part 563b in the recessed area excluding the protrusion 564 of the output shaft member 56, that is, the rotation relay plate 59 rotates. Even if the protruding portion 592a contacts the protruding portion 564 of the output shaft member 56 via the end portion 571 of the brake spring 57, the rotation is not transmitted to the output shaft member 56. The rotation of the rotation relay plate 59 is transmitted to the output shaft member 56.

  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 in a range of a predetermined angle (an angle α3 described later) from the axial center of the shaft hole 591. In this example, the rotation receiving part 594 and the protrusion 592a are formed within the same rotation angle range, but the size and arrangement of the rotation receiving part 594 and the protrusion 592a are changed depending on the application. be able to.

  The input shaft member 60 has a cylindrical shaft portion 601 having a substantially square hole 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. Thus, a protruding piece 603 protruding alongside the shaft portion 601 is formed on the drive transmission output side surface of the flange 604 where the cylindrical shaft portion 606 is formed. In a state where the output side surface of the flange 604 of the input shaft member 60 is disposed so as to be in contact with the proximal end surface of the rotation relay plate 59, the shaft portion 606 and the flange 604 of the input shaft member 60 accommodate the case members 55a and 55b, respectively. The circular opening 559d and the opening side surface 559b at the end on the drive transmission input side of the portion 556 are supported so as to be relatively rotatable. The shaft portion 601 can support the shaft hole 565 of the output shaft member 56 and the shaft hole 591 of the rotation relay plate 59.

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

  Accordingly, the delay unit 5a according to the third embodiment is configured so that the amount of delay 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 transmitted to the output shaft member 56. And a delay amount obtained by adding up the delay amounts between the output shaft member 56 and the output shaft member 56.

  For example, as shown in FIG. 18A, the amount of delay between the rotation relay plate 59 and the output shaft member 56 is such that the protrusion 564 protruding in the range of the angle α1 and the protrusion 592a protruding in the range of the angle α2. And the delay amount β. Further, as shown in FIG. 18B, the delay amount between the input shaft member 60 and the rotation relay plate 59 is such that the rotation receiving portion 594 in the range of the angle α3 and the protruding piece 603 protruding in the range of the angle α4. , The delay amount γ. The amount of delay 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 adjustment member that rotates and relays with a predetermined delay amount.

  In particular, in the delay unit 5a of the present embodiment, the rotation relay plate 59 is positioned inside the spring case 58 and accommodated in the case portions 55a and 55b. The width in the right and left directions can be reduced as compared with the delay unit 5a of the first embodiment.

  Of the constituent members of the delay unit 5a of the third embodiment, only the input shaft member 60 is connected directly to the drive shaft 11, and the delay unit 5a of the third embodiment is arranged side by side on the drive shaft 11. Only by doing this, the rotation of the winding shaft 52 can be interlocked with a predetermined delay amount relative to the rotation of the winding shaft 52 via the obstacle detection / stop device 53 (similar to FIG. 4 described above).

  Also in the present embodiment, the case portions 55a and 55b are respectively formed with claw portions 558 for gripping the projection portions 50b provided on the support case 50 of the cord support unit 5b on the side walls on the drive transmission output side. Has been. As a result, the delay unit 5a according to the third embodiment can be stably assembled in such a manner that the delay unit 5a can be easily attached to and detached from the cord support unit 5b on the drive shaft 11.

  And if it is a horizontal blind which applied the cord support apparatus 5 which has the delay unit 5a of Example 3, if the tilt operation without raising / lowering of the slat 4 is desired, the bottom rail 8 will raise / lower by the tilt operation. There is nothing. Further, when the bottom rail 8 is not at the lower limit position, the operability of tilting after the folding portion of the slat 4 is raised during 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 square recess. Therefore, when the delay unit 5a is installed in each 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). ), The back-and-forth and up-and-down play can be suppressed. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, by holding the cord support unit 5b against the protrusion 50b of the support case 50, the rattling in the left-right direction is also suppressed. Is done.

Example 4
Next, the cord support device 5 having the delay unit 5a of Example 4 according to the obstacle detection / stop 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 Example 4 according to the obstacle detection and stop device 53 of one embodiment of the present invention. Note that the same reference numerals are assigned to components having the same functions as those in the third embodiment. As shown in FIG. 17, the delay unit 5a of the present embodiment includes an output shaft member 56, a brake spring 57, a spring case 58, an input shaft member 60, and a case member 55a as in the third embodiment. , 55b.

  Referring to FIG. 17, the delay unit 5a of the fourth embodiment maintains a reduced size of the case members 55a and 55b as compared with the third embodiment, omits the rotary relay plate 59, and Accordingly, the shape of the input shaft member 60 is changed, 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 5 a according to the fourth embodiment is connected to a cylindrical shaft portion 601 having a substantially square hole-shaped shaft hole 602 directly connected to the drive shaft 11 on the proximal end side of the shaft portion 601. The cylindrical relay shaft portion 605 having a larger diameter and a square hole shaft hole 602, and the 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 603 a protruding side by side with 605 is formed through a flange 604.

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

  For this reason, the protruding piece 603a of the input shaft member 60 can be relatively rotated as long as it is within the range of the engagement 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 60 rotates, the rotation is not transmitted to the output shaft member 56 until the protruding piece 603a contacts the protruding portion 564 of the output shaft member 56. However, after the contact, the input shaft member 60 does not rotate. The rotation is transmitted to the output shaft member 56.

  Further, the shape of the case members 55a and 55b is maintained in a form that contributes to further miniaturization, and the same effects as those of the third embodiment are produced.

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

  Also in the fourth embodiment, the tilt drum 51 is supported by the support case 50 so as not to rotate relative to the drive shaft 11 in the same manner as in the second embodiment (similar to FIG. 13B described above). On the other hand, the take-up shaft 52 is supported by the support case 50 so as not to be connected (not engaged) to the drive shaft 11. In addition, an obstacle detection stop device 53 is provided on the front end side of the winding shaft 52 to prevent rotation of the winding shaft 52 that supports the lifting / lowering cord 10 when tension in the pulling direction does not act on the lifting / lowering cord 10. However, the obstacle detection and stop device 53 is also supported by the support case 50 in a non-coupled (non-engaged) manner with respect to the drive shaft 11. The case main body of the obstacle detection / stop device 53 is fixed to the distal end side of the take-up shaft 52, but the cylindrical cam shaft 531 accommodated in the case main body of the obstacle detection / stop device 53 is moved down the slat 4. When the bottom rail 8 collides with an obstacle, the rewinding of the lifting / lowering cord 10 is stopped, the descent of the slat 4 and the bottom rail 8 is stopped, and the play necessary for preventing the reverse winding of the lifting / lowering cord 10 is provided. The winding shaft 52 can rotate integrally with the winding shaft 52.

  In the delay unit 5a of the fourth embodiment, only the input shaft member 60 is directly connected to the drive shaft 11 and rotates, and the delay unit 5a of the fourth embodiment is simply arranged on the drive shaft 11. The rotation of the winding shaft 52 can be interlocked and rotated with a predetermined delay amount relative to the rotation of the tilt drum 51 with respect to the rotation of the winding shaft 52 via the obstacle detection stop device 53.

  Also in the delay unit 5a of the fourth embodiment, the case portions 55a and 55b include a claw portion 558 that grips the projection portion 50b provided on the support case 50 of the cord support unit 5b on the 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 in such a manner that it can be easily attached to and detached from the cord support unit 5b on the drive shaft 11.

  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 square recess. Therefore, when the delay unit 5a is installed in each 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). ), The back-and-forth and up-and-down play can be suppressed. Further, since the claw portions 558 are formed on the case members 55a and 55b of the delay unit 5a, by holding the cord support unit 5b against the protrusion 50b of the support case 50, the rattling in the left-right direction is also suppressed. Is done.

  In the delay unit 5a in each of the first to fourth embodiments, as shown in FIG. 19 (a), the delay unit 5a is held by fitting with the protrusion 50b of the support case 50 by the claw portion 558 described above. An example in which the shaft portion 561 (an octagonal shaft in the illustrated example) of the output shaft member 5a in 5a and the shaft hole 531a (an octagonal shaft hole in the illustrated example) of the cam shaft 531 of the obstacle detection and stop device 53 are axially coupled will be described. However, the shaft connection can be realized 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. Referring 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 in a cylindrical shape, and convex portions 561b are formed at two opposing positions on the inner peripheral surface 561a. Provide. In addition, on the inner peripheral surface 561a of the shaft portion 561, the elastically deformable engagement pieces 561d are provided at two positions at right angles to the two opposing protruding portions 561b in a manner that does not 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. 19 (a) as the connecting portion of the obstacle detection / stop device 53, the cam shaft 531 has a two-step structure having a step between the portion 5310 and the portion 5319. The outer peripheral surface shape is used, and concave portions 531b are provided at two positions opposite to the portion 5319. In addition, a fitting wall 531c that has a shorter diameter than the inner peripheral wall constituting the shaft hole 5313 of the cam shaft 531 and allows the drive shaft 11 to be inserted is provided on the surface of the connecting portion of the cam shaft 531.

  The convex portions 561b at two opposing positions of the shaft portion 561 can engage with the concave portions 531b at two opposite positions of the portion 5319 of the cam shaft 531. In the connected state by this engagement, the distal end of the shaft portion 561 on the connection side. The fitting projection 561c of the engagement piece 561d of the shaft portion 561 that is elastically deformable is fitted to the fitting wall 531c of the cam shaft 531 at a position where the portion substantially contacts the portion 5310 of the portion 5319 of the cam shaft 531. Thus, the shaft portion 561 of the delay unit 5 a is configured as a locking means that locks 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 modifications are assumed, such as the shapes of the convex portion 561b and the concave portion 531b being interchanged.

  As illustrated in FIG. 19B, the shaft portion 561 and the cam shaft 531 are configured and connected to each other, so that the claw portion 558 and the protrusion portion 50b as illustrated in FIG. The delay unit 5a can be gripped by the cord support unit 5b in such a manner that the rotation of the shaft portion 561 and the cam shaft 531 are connected so as not to be relatively rotatable, and the horizontal displacement does not occur.

(Example 5)
Next, the cord support device 5 having the delay unit 5a of Example 5 according to the obstacle detection / stop 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 Example 5 according to the obstacle detection and stop device 53 of one embodiment of the present invention. FIGS. 21 and 22 are perspective views showing a method of assembling the modified code support device 5 having the delay unit 5a according to the fifth embodiment of the present invention and a schematic configuration thereof. Note that the delay unit 5a and the code support device 5 of the fifth embodiment shown in FIGS. 20 to 22 are illustrated as modified examples from the first embodiment described above. It should be noted that similar modifications can be configured from the second to fourth embodiments. In addition, the same reference numerals are assigned to the same components as those in the above-described embodiments.

  In the first to fourth embodiments described above, the example in which the delay unit 5a is arranged in parallel from the outside of the support case 50 of the cord support device 5 has been described. However, 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 on the inner side of the drive shaft 11 so as to rotate in conjunction with the rotation of the tilt drum 51 with a predetermined delay amount on the drive shaft 11.

  As shown in FIG. 20, the delay unit 5a of the fifth embodiment includes an output shaft member 56, a brake spring 57, a spring case 58, and a rotation relay plate 59, as in the first embodiment (see FIG. 3). Although the input shaft member 60 is provided, the shape of the case member 55 that accommodates the input shaft member 60 and the shape of the input shaft member 60 are partially different from those of the first embodiment.

  Referring to FIG. 20, the delay unit 5 a according to the fifth embodiment is configured to have 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. Accordingly, the shape of the input shaft member 60 is changed, and the output shaft member 56, the brake spring 57, and the spring case 58 are shared by the 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. However, from the surface on the drive transmission input side of the flange 604 of the input shaft member 60 onto the drive shaft 11. The shape of the cylindrical shaft portion 606 having a substantially square hole 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. The bearing 50c is rotatably supported.

  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 transmit the rotation of the input shaft member 60 to the output shaft member 56. Up to this point, the delay amount between the input shaft member 60 and the rotation relay plate 59 and the delay amount between the rotation relay plate 59 and the output shaft member 56 are used.

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

  The circumferential surface of the housing portion 556 of the case member 55 rotatably supports the peripheral edge of the flange 604 of the input shaft member 60, and a convex portion 557 provided on the circumferential surface of the housing portion 556 is a part of the spring case 58. The spring case 58 is fixed in a non-rotatable manner by locking a pair of recesses 582 provided on the spring case 58. Further, the shaft portion 568 and the flange 567 of the output shaft member 56 are supported by a circular opening 559c and an opening side surface 559a on one side surface (drive transmission output side) of the case member 55 so as to be relatively rotatable. 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 engaged with the cam shaft 531 of the obstacle detection / stop device 53 so as to be integrally rotatable.

  As shown in FIG. 21, the delay unit 5a according to the fifth embodiment configured as described above first delays the cord support unit 5b including the tilt drum 51, the winding shaft 52, and the obstacle detection / stop 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 stop device 53. Subsequently, the delay unit 5a, the obstacle detection / stop 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. 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 according to the fifth embodiment stops the obstacle detection so that the winding shaft 52 rotates in conjunction with the rotation of the tilt drum 51 with a predetermined delay amount on the drive shaft 11 as shown in FIG. It is connected to the winding shaft 52 via the device 53 and is accommodated in the support case 50 of the cord support device 5.

  In the case member 55 of the delay unit 5a according to 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. Is 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 is not displaced 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 when the rotation of the tilt drum 51 and the winding shaft 52 can be operated by one drive shaft 11 and the tilt operation without raising / lowering the slat 4 is desired, the bottom rail 8 is raised and lowered by the tilt operation. Can solve the problem. In particular, when the bottom rail 8 is not at the lower limit position, it is possible to solve the problem of tilting after the slat convolution portion is raised during the tilt operation.

[Horizontal blinds of another embodiment using an obstacle detection stop device]
Next, with reference to FIG.23 and FIG.24, the horizontal blind of other embodiment using the obstruction detection stop device 53 is demonstrated. In the embodiment of FIGS. 1 to 22 described above, a configuration in which the rotation amount of the winding shaft 53 can be delayed and rotated relative to the tilt drum 51 using any one of the delay units 5a of Examples 1 to 5. explained. On the other hand, in this embodiment, without providing the delay unit 5a as described above, the amount of operation that allows the amount of rotation that prevents the obstacle detection stop device 53 to rotate the winding shaft 11 to be adjusted by a predetermined amount of rotation. An example in which the adjustment member 54 is provided will be described.

  The horizontal blind according to the present embodiment will be described with reference to FIG. 1, and the operation amount adjusting member 54 is connected to the obstacle detection / stop device 53 inside the winding shaft 52 in that the delay unit 5 a is not provided. The other components can be the same as they are except for the points described above. That is, in the horizontal blind configured such that the operation amount adjusting member 54 is provided in the obstacle detection stop device 53 without providing the delay unit 5a, the bottom rail 8 is allowed to move up and down when the angle of the slat 4 is adjusted. Instead, the operation amount by the obstacle detection / stop device 53 can be adjusted.

  More specifically, the horizontal blind according to the present embodiment is configured to be capable of moving the slats 4 up and down and tilting with a single drive shaft 11 and provided with an obstacle detection / stop device 53. An operation amount adjusting member 54 that can adjust the rotation amount for preventing the rotation of the winding shaft 11 by a predetermined rotation amount is connected to the obstacle detection stop device 53 inside the winding shaft 52.

  FIG. 23 is an exploded perspective view of the working amount adjusting member 54 of an example according to the obstacle detection / stopping device 53 of the embodiment of the present invention. FIGS. 24A and 24B are diagrams showing the operational relationship of the operation amount adjusting member 54 of one example according to the obstacle detection and stop device 53 of one embodiment of the present invention. In the sixth embodiment, the same reference numerals are assigned to components having the same functions as those in the first embodiment.

  Referring to FIG. 23, the shape, structure, and operation of the cam shaft 531, the cam clutch 532, and the cap 533 constituting the obstacle detection / stop device 53 are the same as those described with reference to FIGS. is there.

  That is, also in the present embodiment, the obstacle detection / stop device 53 is connected to the cap 533 that is attached to the winding shaft 11 so as not to rotate relative to the winding shaft 11 and the cap 533 with a rotation amount that prevents the winding shaft 11 from rotating. And a cam clutch 532 that can move in the axial direction relative to the take-up shaft 11 in accordance with the rotation direction of the cam shaft 531. The cam shaft 531 rotates the take-up shaft 11. When blocking, the cap 533 is configured to come into contact with two or more protrusions 5314 and 6334 provided in the rotational direction.

  Further, the cam shaft 531 is formed with a single protrusion 5318 at a step portion where the cylindrical portion 5311 and the cylindrical portion 5312 are connected so as to face each other relative to the position of the sliding protrusion 5315 described above. Has been. Furthermore, an engagement groove 5317 is formed in the cam shaft 531 near the end of the cylindrical portion 5312 on the drive transmission output side. The cap 533 is formed of a substantially cylindrical member having two stages of receiving parts 5330 and 5331 that are connected in steps with different diameters in the diameter-reducing direction from the drive transmission input side to the drive transmission output side. Accommodates the cylindrical portion 5312 of the cam shaft 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 cylindrical portion 5311, and the three protruding portions 5316 are engaged with the protruding walls 5332 to cam. The shaft 531 can be assembled to the cap 533.

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

  When assembled in this manner and the other end of the operation amount adjusting member 54 is accommodated in the accommodating portion 5331 through a gap corresponding to the thickness of the protrusion 5318 of the cap 533, the inner surface of the operation amount adjusting member 54 is The projecting portions 5352 provided at the two locations are engaged with the engaging grooves 5317 of the cam shaft 531 and assembled to the cam shaft 531.

  At this time, a protrusion 5354 is formed at the other end of the operation amount adjusting member 54, and the protrusion 5354 abuts against the protrusion 5318 of the cam shaft 531 as shown in FIG. Relative rotation is possible within a predetermined angular range (in this example, the angle ψ), and the rotation amount θ for preventing the winding shaft 11 from rotating can be changed to be added by a predetermined rotation amount ψ. Thus, by adding the operation amount adjusting member 54, the rotation amount θ for preventing the winding shaft 11 from rotating can be adjusted to another rotation amount.

  That is, as shown in FIG. 24B, in the example of FIG. 10B described above, the angle from when the bottom rail 8 collides with the obstacle until the obstacle detection is activated is an angle at most. It is possible to add the rotation amount of the obstacle detection / stop device 53 that is regulated to be within θ by a predetermined rotation amount ψ. The operation amount adjusting member 54 can change the range of the predetermined rotation amount ψ in the range of 0 ≦ ψ <360 by changing the shape of the protrusion 5354. As described above, the operation amount adjusting member 54 can change the angle from the time when the bottom rail 8 by the obstacle detection and stop device 53 collides with the obstacle until the obstacle detection is activated. The specification can be diverted to a horizontal blind, and the versatility of the obstacle detection stop device 53 is enhanced.

  The present invention has been described above with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. For example, in the example of the above-described embodiment, the example mainly through the obstacle detection and stop device 53 has been described, but the embodiment is not limited thereto, and is configured to be directly or indirectly engaged with the winding shaft 52. If it is, the effect | action and effect which concern on this invention can be exhibited.

  In the example of the embodiment described above, an example has been described in which the delay unit 5a is selectively used for each type of the code support unit 5b. For example, the code support unit 5b illustrated in FIG. Instead of applying the delay unit 5a, a rotation 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. 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 the tilt operation without raising / lowering the slat is desired, the bottom rail moves up and down by the tilt operation. In particular, the horizontal blind that enables the slats to be moved up and down and tilted with a single drive shaft since the versatility of the obstacle detection and stop device is improved and the responsiveness is excellent. It is useful for applications.

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

Claims (12)

Rotation of a winding shaft that supports the lifting / lowering cord when a pulling direction tension is not applied to the lifting / lowering cord used for the lifting / lowering operation of the slat in a horizontal blind that enables the lifting / tilting operation of the slat with a single drive shaft. An obstacle detection stop device that prevents
With respect to a tilt drum that adjusts the angle of the slats via a ladder cord, when the slats are turned upside down after tilting the slats in a predetermined direction, the rotation of the drive shaft is transmitted to the tilt drums. The output shaft of the delay unit that prevents the rotation of the winding shaft during the angle adjustment of the slats and delays the drive shaft and the winding shaft to rotate in conjunction after a predetermined relative rotation is rendered incapable of relative rotation. Connected camshafts,
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;
An obstacle detection stop device comprising: The cam shaft is connected to a cap that is attached to the winding shaft so as not to rotate relative to the winding shaft;
The obstacle detection and stop device according to claim 1, wherein the cam clutch is configured to be relatively movable in the axial direction with respect to the take-up shaft according to a rotation direction of the cam shaft.   The cam shaft is configured to abut against the cap at two or more protrusions provided in the rotation direction when the cam clutch prevents the winding shaft from rotating. The obstacle detection and stop device according to claim 2, characterized in that it is characterized in that:   4. The cam clutch according to claim 1, wherein the cam clutch is configured to engage with the take-up shaft so as to relatively move in the axial direction as the take-up shaft rotates. The obstacle detection stop device according to claim 1. The obstacle detection stop device according to any one of claims 1 to 4,
The delay unit;
A horizontal blind characterized by comprising: The delay unit is
An input shaft member directly connected to the drive shaft;
An output shaft member that has the output shaft portion that transmits the rotation of the input shaft member so as to rotate in conjunction with the predetermined delay amount, and that engages the input shaft member with play of a predetermined rotation angle; and
A braking member that suppresses rotation of the output shaft member other than rotation by rotation transmission from the input shaft member;
A case member that houses the input shaft member, the output shaft member, and the braking member;
The horizontal blind according to claim 5, comprising: The braking member is
A coil-shaped brake spring having a pair of end portions that engage with a part of the output shaft member while allowing rotation transmission from the input shaft member to the output shaft member;
A spring case that receives the brake spring with a reduced diameter and is locked to a case member of the delay unit;
The horizontal blind according to claim 6, comprising:   A rotation 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 by the above.   The horizontal blind according to any one of claims 5 to 8, wherein a rotation amount delayed by the delay unit is set to be equal to or greater than an angle adjustment range of the slat.   The restraining wall which suppresses the movement to the upper direction of the said cam shaft is provided in the support case which supports the said obstacle detection stop device, It is characterized by the above-mentioned. Obstacle detection stop device. A horizontal blind that can move up and down and tilt a slat with a single drive shaft and includes an obstacle detection and stop device,
An obstacle detection / stop device for preventing rotation of the winding shaft supporting the lifting / lowering cord when tension in the pulling direction does not act on the lifting / lowering cord used for the lifting / lowering operation of the slat;
With respect to a tilt drum that adjusts the angle of the slats via a ladder cord, when the slats are turned upside down after tilting the slats in a predetermined direction, the rotation of the drive shaft is transmitted to the tilt drums. A delay unit that prevents rotation of the winding shaft during angle adjustment of the slat and delays the drive shaft and the winding shaft to rotate together after a predetermined relative rotation;
The obstacle detection stop device is:
A camshaft connected to the output shaft of the delay unit so as not to be relatively rotatable;
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;
A cap attached so as not to rotate relative to the winding shaft;
The horizontal type is characterized in that the cam shaft is configured to abut against the cap at two or more protrusions provided in the rotational direction when preventing the winding shaft from rotating. blind. A horizontal blind that can move up and down and tilt a slat with a single drive shaft and includes an obstacle detection and stop device,
An obstacle detection / stop device for preventing rotation of the winding shaft supporting the lifting / lowering cord when tension in the pulling direction does not act on the lifting / lowering cord used for the lifting / lowering operation of the slat;
An operation amount adjusting member that makes it possible to adjust a rotation amount that prevents rotation of the winding shaft by the obstacle detection and stop device by a predetermined rotation amount;
The obstacle detection stop device is:
A camshaft connected to the output shaft of the delay unit so as not to be relatively rotatable;
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;
A cap attached so as not to rotate relative to the winding shaft;
The camshaft is configured to abut against the cap at two or more protrusions provided in the rotational direction when preventing the winding shaft from rotating,
The horizontal blind according to claim 1, wherein the operation amount adjusting member is connected to the drive shaft so as not to rotate relative to the drive shaft.