JP6346019B2 - Blind rotating device - Google Patents

Description

  The present invention relates to a rotating device for a horizontal blind.

  As a conventional horizontal blind, there is known a blind in which a slat is raised and lowered by raising and lowering a bottom rail with a raising and lowering cord, and a slat is inclined by raising and lowering a ladder cord arranged before and after the slat. Further, in order to operate the lifting and tilting of the slats with the same rotating shaft, the lifting drum for lifting the lifting cord is rotated integrally with the rotating shaft, the ladder drum for lifting the ladder cord is integrally rotated to a predetermined angle by the clutch, Above that, a blind rotating device for relative rotation is known.

  In addition, as one of the technologies related to such a rotating device, a ladder clamp that hangs a ladder cord that holds a slat is attached to a rotatable shaft via a ladder clutch, and a clutch drum in which the ladder clutch is rotatable with the shaft; A clutch spring fitted into the clutch drum, a ladder drum fitted into the clutch drum so as to be slidable in the circumferential direction, and a clutch drum holder for rotatably holding the clutch drum. A protrusion is provided on the peripheral surface that can lock one end of the clutch spring, and a protrusion that can lock the other end of the clutch spring is provided on the clutch drum holder so that the ladder clamp can slide in the circumferential direction. There is known a slat drive device for a horizontal blind that is inserted into a slat (see Patent Document 1).

  In this slat drive device, one end of a clutch spring that rotates integrally with the clutch drum is engaged with the protrusion, whereby the clutch drum is rotated, and the slat is maintained at a maximum standing angle while maintaining a predetermined angle with respect to the ladder clamp. Only when the clutch drum slides and the other end of the clutch spring is locked to the protrusion of the clutch drum, the clutch spring is relaxed and the transmission from the shaft to the clutch drum is released.

JP 2014-66117 A

  When performing non-normal operation different from normal operation, such as assembling work or maintenance work of the blind that raises and lowers the lifting code and ladder code with the same shaft using the clutch as described above, only the ladder drum must be rotated relatively. There is a situation that must be done. However, according to the above-described slat drive device, the ladder drum is slidably inserted into the clutch drum in which the clutch spring is inserted. Therefore, it is difficult to relatively rotate the ladder drum regardless of the rotation of the shaft. There is a problem that it is not structurally suitable for non-normal operation. For example, when the ladder drum is slidably fitted into the rotating body, the positional relationship between a predetermined position in the support portion that rotatably supports the ladder drum and the locking portion of the inner circumferential surface of the ladder drum in the rotating body Therefore, even if a through hole is provided in the support portion, the claw portion cannot always be operated through the through hole. Further, since the ladder clamp is fitted into the ladder drum so as to be slidable in the circumferential direction, it is difficult to operate the pawl portion from the outer peripheral surface side of the ladder clamp.

  Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a blind rotating device that is more suitable for the operation of relatively rotating only a ladder drum.

  In order to solve the above problems, a blind rotating device according to the present embodiment is a blind rotating device having a ladder cord suspended from a head box and a slat supported in an aligned state by the ladder cord, The rotating device includes a rotating body that rotates integrally with a rotating shaft that is rotatably supported in the head box, and is wound around the outer periphery of the rotating body to fasten the rotating body and radially outward with the rotating shaft as a center. The ladder drum is provided with a clutch spring provided with protruding claw portions at both ends, a ladder drum that can rotate relative to the rotation shaft, and a restriction portion that restricts integral rotation of the rotation shaft of the ladder drum with a predetermined angle or more. The circular side surface provided with an opening through which the rotating shaft is inserted has a shape in which a peripheral wall extending a predetermined distance in the axial direction from the periphery of the side surface is provided, and is provided on the outer peripheral surface of the peripheral wall. A fixing unit for fixing the upper end of the keycode, characterized in that it comprises a locking portion for locking the provided so as to protrude radially inward to the inner peripheral surface of the peripheral wall claws.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the blind rotation apparatus more suitable for the operation | movement which rotates only a ladder drum relatively.

It is a front view of the blind which concerns on embodiment of this invention. It is a front view of a rotating device. It is a perspective view of a rotating device. It is a disassembled perspective view of a raising / lowering drum and a rotating drum. It is the side view which looked at the rotating apparatus from the rotating drum side. It is AA sectional drawing of FIG. 2 which shows the rotating apparatus in the fully open state of a blind. It is AA sectional drawing of FIG. 2 which shows the rotating apparatus in the fully closed state of a blind. It is AA sectional drawing of FIG. 2 which shows the rotating apparatus in the anti-fully closed state of a blind. It is a perspective view which shows the rotating apparatus with which the jig | tool was inserted in the through-hole. It is AA sectional drawing of FIG. 2 which shows the rotating apparatus with which the jig | tool was inserted. It is AA sectional drawing which shows the rotating apparatus with which only a ladder drum is rotated.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Blind configuration)
First, the configuration of the blind according to the embodiment will be described with reference to FIG. FIG. 1 is a front view of a blind according to the embodiment. In the following explanation, when the longitudinal direction of the blind is set to the side, and the installed blind is viewed from the side, the installation surface side (for example, the window side) is the rear side, and the opposite (for example, the indoor side) is the front side. explain.

  As shown in FIG. 1, the blind 1 is a horizontal blind, and includes a head box 10, a bracket 11, a bottom rail 12 disposed at the lower end of the blind 1, and a plurality of shielding materials between the head box 10 and the bottom rail 12. The slats 13 are arranged, and the vertical cords 14a and 14b are arranged so as to sandwich the slats 13 from the front and back. The slats 13 are suspended from the head box 10 to support the plurality of slats 13 in alignment, and the bottom rails 12 are fixed at the lower ends The ladder cord 14 hangs down from the head box 10 and has a lower end fixed to the bottom rail 12 and a lifting cord 15 having a predetermined width.

  The head box 10 is fixed to a window frame (not shown) or the like by a bracket 11, and includes a rotary shaft 16 that is rotatably supported, and three rotary devices 17 that rotate in conjunction with the rotation of the rotary shaft 16. The motor 31 attached to the head box 10 for rotating the rotary shaft 16, the encoder 32 for detecting the rotation angle of the motor 31, and the drive of the motor 31 are controlled based on the rotation angle detected by the encoder 32. A control unit 33 is provided.

  The rotating shaft 16 extends in the longitudinal direction so as to be able to rotate in the head box 10, and is inserted into the rotating device 17 pivotally supported at a predetermined position of the head box 10 so as to be bidirectional with the rotating device 17. Rotation can be transmitted to

(Configuration of rotating device)
Next, the configuration of the rotating device will be described with reference to FIGS. FIG. 2 is a front view of the rotating device. FIG. 3 is a perspective view of the rotating device. FIG. 4 is an exploded perspective view of the elevating drum and the rotating drum. FIG. 5 is a side view of the rotating device as viewed from the rotating drum side. 6 is a cross-sectional view taken along line AA of FIG. 2 in a fully opened state.

  As shown in FIG. 2, the rotating device 17 is fixed to the head box 10 in a longitudinal direction, the lifting drum 18 to which the upper end of the lifting cord 15 is fixed, the rotating drum 19 to which the upper ends of the vertical cords 14 a and 14 b are fixed. By supporting the rotating shaft 16 at both ends in the direction, a lifting drum 18 through which the rotating shaft 16 is inserted and a drum base 20 that supports the rotating drum 19 are provided. Here, the elevating drum 18 is inserted through the rotary shaft 16 so as to rotate integrally with the rotary shaft 16, and the rotary drum 19 is integrally rotated up to a predetermined angle and further rotated relative thereto.

  As shown in FIG. 4, the elevating drum 18 includes a drum body 181 that winds and unwinds the elevating cord 15 fixed by the rotation, and a shaft portion that is smaller in diameter than the drum body 181 that protrudes toward the rotating drum 19 in the axial direction. 182. A fixing hole 181 a is formed in the drum body 181 near the shaft portion 182.

  Further, as shown in FIGS. 3 to 6, particularly FIG. 4, the rotating drum 19 includes a ladder drum 191 to which the ladder cord 14 is fixed, a regulating portion 192 that regulates the rotation angle of the ladder drum 191, and a ladder drum 191. A fixing portion 193 that fixes the position in the axial direction, and a rotating body 194 and a clutch spring 195 disposed between the ladder drum 191 and the restriction portion 192. The ladder drum 191, the rotating body 194, and the fixed portion 193 are inserted through the shaft portion 182 of the elevating drum 18.

  As shown in FIG. 4, the rotating body 194 is provided with an insertion hole for inserting the shaft portion 182, a large diameter portion 194 a around which the clutch spring 195 is wound, and the large diameter The small-diameter portion 194b has a smaller diameter than the portion 194a and passes through the restricting portion 192. The rotating body 194 is disposed between the ladder drum 191 and the restricting portion 192 so that the large diameter portion 194a is on the ladder drum 191 side and the small diameter portion 194b is on the restricting portion 192 side. The small-diameter portion 194 b is formed with a fixing portion 194 c that protrudes in the axial direction toward the lifting drum 18, and the fixing portion 194 c fits into the fixing hole 181 a of the lifting drum 18, whereby the rotating body 194 has the rotating shaft 16. Rotate integrally with the lifting drum 18 that rotates integrally with.

  As shown in FIG. 4, the clutch spring 195 is wound around the outer periphery of the large-diameter portion 194 a of the rotating body 194 so as to fasten the rotating body 194 with such a strength that it rotates integrally with the rotating body 194. Each has claw portions 195a and 195b formed by bending in the outer diameter direction. Here, the claw portion 195a is located on the front side in the front-rear direction of the blind 1 with respect to the claw portion 195b, and the claw portion 195b is located on the rear side in the front-rear direction of the blind 1 with respect to the claw portion 195a. Further, the pawl portion 195a and the pawl portion 195b are formed such that both end portions of the clutch spring 195 overlap each other by a predetermined distance in the circumferential direction.

  3 and 4, the ladder drum 191 is provided with an opening through which the shaft portion 182 of the elevating drum 18 is inserted, that is, an opening through which the rotating shaft 16 is indirectly inserted, and has a circular shape having a predetermined diameter. A peripheral wall extending a predetermined distance in the axial direction from the periphery of the side surface is formed on the side surface along the entire circumferential direction. Further, as shown in FIGS. 5 and 6, the ladder drum 191 accommodates therein a rotating body 194, a clutch spring 195, and a part of the restricting portion 192, and a vertical cord 14a is disposed at a predetermined position on the outer peripheral surface thereof. And the adhering part 191c which adhering the upper end of 14b is provided, and the through-holes 191a and 191b are provided in the side surface. Further, as shown in FIG. 6, the inner peripheral surface of the ladder drum 191 is formed with a locking portion 191 d that protrudes toward the center in the radial direction and locks with the pawls 195 a and 195 b of the clutch spring 195. The diameter of the clutch spring 195 is set to an outer diameter that does not contact the locking portion 191 d formed on the inner peripheral surface of the ladder drum 191.

  The claw portions 195a and 195b are formed so as to sandwich the locking portion 191d with a predetermined gap therebetween. Since the claw portions 195a and 195b are formed so that both ends of the clutch spring 195 overlap as described above, when force is applied between the claw portions 195a and 195b by the locking portion 191d, the claw portions 195a and 195b are moved to the rotating body 194. As a result, a force is applied in the winding direction, and the clutch spring 195 is not relaxed. As shown in FIG. 5, the through holes 191a and 191b are formed at positions corresponding to the claw portions 195a and 195b, respectively. Specifically, when the rotating device 17 is viewed from the rotating drum 19 side in the axial direction, at least a part of each of the claw portions 195a and 195b is positioned so as to be within the opening range of the through hole. , 191b are formed respectively.

  As shown in FIGS. 3 and 6, the drum base 20 is formed in a long shape in the axial direction, and protrudes upward at both ends in the axial direction to support the rotating shaft 16, and its longitudinal direction. Corresponding to the position where the restricting portion 192 is disposed, projecting portions 20c and 20d projecting upward are formed. Here, the protrusions 20c and 20d are formed at different positions in the front-rear direction of the blind 1, the protrusion 20c is positioned on the front side of the blind 1 with respect to the protrusion 20d, and the protrusion 20d is the protrusion 20c. Suppose that it is located behind the blind 1 in the front-rear direction. Of the support portions 201 and 202, the support portion 201 formed on the rotating drum 19 side is formed with slits 201 a and 202 b having a predetermined length from above the blind 1 at different positions in the front-rear direction of the blind 1. . Here, the slit 201a is located on the front side in the front-rear direction of the blind 1 with respect to the slit 201b, and the slit 201b is located on the rear side in the front-rear direction of the blind 1 with respect to the slit 201a. Further, the positions of the slits 201a and 201b in the front-rear direction of the blind 1 depend on the radial positions of the through holes 191a and 191b of the ladder drum 191. Specifically, the integral rotation with the rotating shaft 16 of the ladder drum 191 is restricted. This is a position corresponding to the positions of the through holes 191a and 191b in a state regulated by the portion 192.

  As shown in FIGS. 4 to 6, the restricting portion 192 includes a rotation restricting portion 192 a that restricts the rotation of the restricting portion 192 and a ladder drum restricting portion 192 b that restricts the rotation of the ladder drum 191 having a predetermined angle or more. The The rotation restricting portion 192a is formed with an insertion hole through which the small-diameter portion 194b of the rotating body 194 is inserted, and is formed in a fan shape with a predetermined angle centered on the axis of the insertion hole. In a state where the small-diameter portion 194b is inserted through the restricting portion 192 and disposed on the drum base 20, the both ends in the circumferential direction of the rotation restricting portion 192 abut against the projecting portions 20c and 20d of the drum stand 20, respectively. Thus, the rotation of the restricting portion 192 is restricted. That is, the restricting portion 192 rotates relative to the rotating shaft 16. The rudder drum restricting portion 192b is smaller than the ladder drum 191 and has a larger diameter than the rotating body 194 around which the clutch spring 195 is wound, and has a predetermined circle in a circle centering on the axial center of the insertion hole formed in the rotation restricting portion 192a. It is formed so as to protrude in the axial direction by the circumferential distance. Here, according to the circumferential distance, the positions of both ends in the circumferential direction of the ladder drum restricting portion 192b are determined. According to the positions of both ends in the circumferential direction, the ladder drum 191 is integrated with the rotary shaft 16 and the lifting drum 18. A rotatable angle is determined. Further, the lengths of the slits 201a and 201b formed in the support portion 201 of the drum base 20 depend on the positions of both ends in the circumferential direction of the ladder drum restricting portion 192b.

(Normal operation of rotating device)
Next, normal operation of the rotating device will be described with reference to FIGS. Here, the normal operation indicates an operation in which the user uses the blind 1. 7 is a cross-sectional view taken along line AA of FIG. 2 in a fully closed state of the blind. FIG. 8 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 7, when the rotary shaft 16 is rotated rearward, the claw portion 195a of the clutch spring 195 wound around the rotating body 194 that rotates integrally with the elevating drum 18 is engaged with the locking portion 191d of the ladder drum 191. When the locking portion 191d is pressed against the claw portion 195a, the ladder drum 191 rotates together with the lifting drum 18, the vertical cord 14a is pulled up, the vertical cord 14b is pulled down, and the slat 13 tilts backward. When the slat 13 further rotates and the claw portion 195b contacts the circumferential rear end of the ladder drum restricting portion 192b, the winding of the clutch spring 195 around the rotating body 194 is relaxed, and the clutch spring 195 rotates relative to the rotating body 194. When the clutch spring 195 rotates relatively, the locking portion 191d is not pressed against the pawl portion 195a, and the ladder drum 191 rotates relative to the rotating body 194, that is, the elevating drum 18 and the rotating shaft 16.

  As shown in FIG. 8, when the rotary shaft 16 is rotated forward, the claw portion 195b of the clutch spring 195 wound around the rotating body 194 that rotates integrally with the lifting drum 18 is brought into contact with the locking portion 191d of the ladder drum 191. When the latching portion 191d is pressed against the pawl portion 195b, the ladder drum 191 rotates together with the lifting drum 18, the vertical cord 14b is pulled up, the vertical cord 14a is pulled down, and the slat 13 tilts forward. When the slat 13 is further rotated to the anti-fully closed state and the pawl portion 195a contacts the circumferential front end of the ladder drum restricting portion 192b, the wrapping of the clutch spring 195 around the rotating body 194 is relaxed, and the clutch spring 195 rotates relative to the rotating body 194. When the clutch spring 195 rotates relatively, the locking portion 191d is not pressed against the pawl portion 195b, and the ladder drum 191 rotates relative to the rotating body 194, that is, the elevating drum 18 and the rotating shaft 16.

  As described above, the structure in which the clutch spring is built in the ladder drum allows the clutch spring to be wound in the axial direction without extending the size of the rotating device in the longitudinal direction, that is, without greatly changing the configuration of the drum base. Can be increased. By not greatly changing the configuration of the drum base, it is possible to reduce the production cost by sharing parts with other products. Further, by increasing the winding, the holding force necessary for the ladder drum can be increased even when a relatively heavy material is used as the slat. In addition, by increasing the outer diameter of the clutch spring in accordance with the diameter of the inner circumferential surface of the ladder drum, the contact area between the clutch spring and the rotating body is increased, and the ladder drum of the locking portion that presses the pawl portion of the clutch spring Since the distance from the center of the inner peripheral surface of the clutch and the outer diameter of the clutch spring can be substantially matched, the holding force required for the ladder drum can be increased. That is, according to the structure in which the clutch spring is built in the ladder drum, the holding force of the slat can be increased while reducing the production cost.

(Non-normal operation of rotating device)
Next, the non-normal operation of the rotating device will be described. Here, the non-normal operation refers to an operation at the time of assembling the blind or an operation at the time of maintenance in a situation where the rotary shaft cannot rotate, and specifically, an operation from the outside rather than by the rotation of the rotary shaft Shows the operation of rotating only the ladder drum. FIG. 9 is a perspective view showing a rotating device in which a jig is inserted into the through hole. FIG. 10 is a cross-sectional view taken along line AA showing the rotating device in which the jig is inserted. FIG. 11 is a cross-sectional view taken along line AA showing a rotating device in which only the ladder drum is rotated.

  As shown in FIG. 9, the non-normal operation of the rotating device 17 is performed using a jig 90. As shown in FIG. 8, in the rotating device 17, the rudder drum 191 rotates forward so that the slat 13 is tilted forward to be in the fully closed state, and the pawl portion 195a contacts the ladder drum restricting portion 192b. As a result, the ladder drum 191 does not rotate integrally with the elevating drum 18 and the rotary shaft 16 in the forward direction.

  The jig 90 is an instrument formed in a long shape so as to become thinner from the rear end to the front end, the rear end portion is formed to an appropriate thickness as a handle of the operator, and the front end portions are through holes 191a and 191b. And is formed so as to form an acute angle that can be inserted between the claw portion 195a or the claw portion 195b and the locking portion 191d.

  When the leading end of the jig 90 passes through the slit 20a and is inserted between the pawl 195a and the ladder drum restricting portion 192b as shown in FIG. 10 through the through-hole 191a, Thus, a force can be applied from the front side to the rear side in the rotation direction. When a force is applied to the rear side by the inserted jig 90, the claw portion 195a moves in the direction opposite to the winding direction of the clutch spring 195, and the tightening of the clutch spring 195 on the rotating body 194 is relaxed. As a result, the clutch spring 195 can be rotated relative to the rotating body 194. Therefore, as shown in FIG. 11, the ladder drum 191 can be rotated relative to the elevating drum 18 and the rotating shaft 16 in the rearward direction. 13 can be tilted backwards.

  Although the case where the ladder drum 191 is rotated backward by the jig 90 has been described as the non-normal operation, similarly, the tip end portion of the jig 90 is inserted into the through hole 191b so that the fully closed state is achieved. The slat 13 can be tilted forward by rotating the ladder drum 191 rotated in the forward direction.

  In the above embodiment, the through hole is formed on the side surface of the ladder drum. However, the same effect can be obtained by forming the through hole at a position corresponding to the claw portion of the clutch spring on the peripheral wall of the ladder drum 191. .

  A circumferential wall extending a predetermined distance in the axial direction from the periphery of the ladder drum is provided along the entire circumferential direction on a side surface of a predetermined diameter provided with an opening through which the rotation shaft is inserted through the shaft portion of the lifting drum. By configuring the rotating device as a shape, a configuration suitable for non-normal operation can be obtained while incorporating a clutch spring in the ladder drum. Since the positional relationship between the predetermined position on the side surface of the ladder drum and the locking portion of the inner peripheral surface is always the same regardless of how the ladder drum rotates, only a through hole is made at a position corresponding to the clutch spring. This makes it easy to operate the clutch spring.

  Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Blind 10 Head box 13 Slat 14 Ladder cord 16 Rotating shaft 17 Rotating device 20 Drum base 191 Ladder drum 191a, 191b Through-hole 191c Adhering part 191d Locking part 192 Restricting part 194 Rotating body 195 Clutch spring 195a, 195b Pawl part 201, 202 Support part 201a, 201b Slit

Claims (2)

A rotating device (17) for a blind (1) having a ladder cord (14) suspended from a head box (10) and a slat (13) supported in alignment by the ladder cord,
The rotating device
A rotating body (194) that rotates integrally with a rotating shaft (16) that is rotatably supported in the head box;
A clutch spring (195) wound around the outer periphery of the rotating body to fasten the rotating body and having pawls (195a, 195b) projecting radially outward centered on the rotational axis;
A ladder drum (191) capable of rotating relative to the rotation shaft;
A regulation portion (192) that regulates integral rotation of the rudder drum with a rotation shaft having a predetermined angle or more;
The ladder drum has a shape in which a peripheral wall extending a predetermined distance in the axial direction from the peripheral edge of the side surface is provided on a circular side surface provided with an opening through which the rotation shaft is inserted, and is provided on the outer peripheral surface of the peripheral wall. A fixing portion (191c) for fixing the upper end of the cord, and a locking portion (191d) that is provided on the inner peripheral surface of the peripheral wall so as to protrude radially inward and locks to the claw portion ;
A blind rotating device characterized in that through holes (191a, 191b) are provided at positions corresponding to the claw portions locked to the locking portions on the side surface or the peripheral wall of the ladder drum . The rotating device is rotatably supported by a drum base (20) fixed in the head box,
The drum base includes support portions (201, 202) that are formed to protrude upward at both ends in the axial direction and support the rotating device.
The support portion (201) on the side surface side of the ladder drum is provided with slits (201a, 201b) at positions corresponding to the positions of the through holes in a state where the ladder drum is integrally rotated with the rotation shaft by the restriction portion. The blind rotating device according to claim 1 , wherein:

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