JP6025724B2 - Connecting device and roll blind - Google Patents

Description

  The present invention relates to a connecting device for connecting a pair of shafts to each other in a roll blind, and a roll blind provided with the connecting device.

  In the roll blind, the screen is suspended and supported from a take-up shaft that is rotatably supported between support brackets, and the take-up shaft is rotationally driven by the operation of the operating device, and the screen is raised and lowered.

  A spring motor for pulling up the screen, a stopper device that holds the screen at the desired height against the urging force of the spring motor, and a governor device that limits the screen pulling speed are installed in the winding shaft. Has been.

Patent Document 1 discloses a roll blind provided with a spring motor, a stopper device, a governor device and the like in a winding shaft.
In such a roll blind, on one end side of the winding shaft, the stopper device and the governor device operate with the hold shaft protruding from the operation unit as a fulcrum.

  One end of the spring motor is held by a support bracket on the other end side of the take-up shaft, and the other end is held by the take-up shaft via a drive plug. The spring motor is stored when the screen is lowered, and the urging force of the spring motor acts on the winding shaft in the winding direction of the screen during the lifting operation.

Japanese Patent No. 3282981

  In the roll blind as described above, a plurality of parts are required to connect the stopper device and the governor device to the operation unit. That is, the shaft joint that connects the hold shaft and the clutch drum of the stopper device, the joint case that connects the case of the operation unit and the external cylinder of the stopper device, and the components in the operation unit are prevented from coming off from the hold shaft. An E ring or the like is required, and the number of parts increases.

  An object of the present invention is to provide a connecting device that can easily connect a pair of shafts in a roll blind to each other, and a roll blind including the connecting device.

According to the present invention, in the coupling device for coupling the pair of shafts to each other via the coupling cylinder,
The connecting cylinder has an opening;
A fitting portion provided on one of the pair of shafts is elastically fitted to the connecting cylinder,
A coupling device is provided, wherein the other of the pair of shafts is arranged at a position to prevent the fitting portion from being bent, and the fitting portion is held at an engagement position with the coupling cylinder.

Hereinafter, embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.
Preferably, the fitting portion is a bifurcated fitting piece provided at one end portion of the pair of shafts, and a line connecting the outer shapes becomes a square axis, and the connecting tube has square holes at both ends. The fitting piece is elastically and non-rotatably fitted in one square hole of the connecting cylinder, and the other of the pair of shafts is non-rotatable in the other square hole of the connecting cylinder. While being fitted, the fitting piece is held at an engagement position with the connecting cylinder.

Preferably, the connecting device connects a pair of rotating cylinder driving devices provided in the rotating cylinder and including a rotating body that rotates integrally with the rotating cylinder and a fixed shaft that is positioned at the rotation center of the rotating body. Connecting device
Each of the pair of shafts is a fixed shaft of each of the pair of rotary cylinder driving devices.

  Preferably, the rotating cylinder is a winding shaft, and one of the rotating cylinder driving devices is a stopper device.

Preferably, a connecting shaft provided with the fitting piece is attached to an end portion of a support cylinder inserted through a spring motor provided in the winding shaft.
Preferably, a governor device is connected to the stopper device.

Preferably, a soft finish device and a governor device are connected to the stopper device.
Preferably, the front end of the fitting piece is formed in a bowl shape, and a locking hole is provided at the center in the longitudinal direction of the connecting cylinder so that the front end of the fitting piece can be elastically fitted.

Preferably, the connecting cylinder is formed in a line symmetrical shape in the axial direction.
Preferably, a protrusion that prevents insertion of the fitting piece is provided at one end of the connecting cylinder, and the fitting piece is inserted from the other end of the connecting cylinder at a position deviated from the longitudinal central portion of the connecting cylinder. A locking hole is provided to engage with.

  Preferably, the drive plug of the spring motor is provided with an opening that makes the locking hole visible.

Preferably, the coupling device includes a spring motor having one end held by the support bracket in a winding shaft that is rotatably supported by a support bracket, and the winding shaft is screened by an urging force of the spring motor. It is a roller blind coupling device that rotates in the winding direction,
One of the shafts is a bracket shaft fixed to the support bracket,
The other of the shafts is an attachment end of the spring motor,
The connecting cylinder is a pipe cap that is fitted to an end of the winding shaft and elastically fitted to the attachment end.
The bracket shaft is provided with fitting holding means for holding fitting between the pipe cap and the attachment end.

  Preferably, the attachment end portion is provided with a plurality of locking pieces that are non-rotatably fitted to the bracket shaft, and the locking pieces are provided with engagement means that elastically engages the pipe cap. .

  Preferably, the fitting holding means includes a locking groove in the bracket shaft for supporting the locking piece in a non-rotatable manner and holding the locking piece in a position for engaging the pipe cap.

  Preferably, the locking groove is provided in a shaft portion of the bracket shaft that is inserted between the locking pieces after the locking pieces are engaged with the pipe cap.

Preferably, the coupling device limits the transmission torque from the pipe cap attached to one end of the winding shaft rotatably supported by the support bracket to the pipe cap from the output shaft rotated by operation of the operation cord. It is a roll blind connecting device equipped with a torque limiter,
The torque limiter includes a pipe cap shaft having a through hole into which the output shaft can be fitted,
The pipe cap shaft has a locking projection that engages with the pipe cap,
One of the shafts is the pipe cap shaft;
The other of the shafts is the output shaft,
The connecting cylinder is the pipe cap;
The output shaft is disposed at a position where the output shaft is inserted into the through hole and prevents the pipe cap shaft from being bent at the locking projection.

  Preferably, the pipe cap shaft includes a rib on an inner peripheral surface of the through hole, and the rib is provided at a position where the locking projection is pressed radially outward by the insertion of the output shaft.

  Preferably, the pipe cap shaft has a slit at a position that facilitates bending of a portion where the locking protrusion is provided.

  Moreover, according to another viewpoint of this invention, a roll blind provided with the said connection apparatus is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the connecting device which can connect a pair of axis | shaft in a roll blind mutually easily, and a roll blind provided with this connecting device are provided.

It is a front view which shows the roll blind of 1st embodiment. It is a side view which shows the roll blind of 1st embodiment. It is sectional drawing which shows a connection apparatus. It is a perspective view which shows a connection apparatus. It is a disassembled perspective view which shows a connection apparatus. It is sectional drawing which shows the assembly procedure of a connection apparatus. It is sectional drawing which shows the assembly procedure of a connection apparatus. It is sectional drawing which shows the assembly procedure of a connection apparatus. It is sectional drawing which shows the assembly procedure of a connection apparatus. It is sectional drawing which shows the assembly procedure of a connection apparatus. It is sectional drawing which shows the assembly procedure of a connection apparatus. It is a front view which shows 2nd embodiment. It is sectional drawing which shows the coupling device of 2nd embodiment. It is a side view which shows the connection pipe | tube of 2nd embodiment. It is a side view which shows the connection pipe | tube of 2nd embodiment. It is a front view which shows 3rd embodiment. It is a front view which shows the roll blind of 4th embodiment. It is a side view which shows the roll blind of 4th embodiment. It is sectional drawing which shows the spring motor attachment apparatus of 4th embodiment. It is a disassembled perspective view which shows the principal part of the spring motor attachment apparatus of 4th embodiment. It is sectional drawing which shows the assembly procedure of the roll blind of 4th embodiment. It is sectional drawing which shows the assembly procedure of the roll blind of 4th embodiment. It is a front view which shows the roll blind of 5th embodiment. It is sectional drawing which shows the edge part of the winding shaft of 5th embodiment (the same cross section as the AA surface of FIG. 27). It is sectional drawing which shows the torque limiter of 5th embodiment (the same cross section as the BB surface of FIG. 27). It is a disassembled perspective view which shows the torque limiter of 5th embodiment. It is a side view which shows the pipe cap shaft of 5th embodiment. It is a disassembled perspective view which shows the modification of the torque limiter of 5th embodiment.

(First embodiment)
Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In this embodiment, the connecting device mainly connects the fixed shaft of the stopper device and the fixed shaft of the spring motor.
The roll blind shown in FIGS. 1 and 2 is a double roll blind in which screens suspended from two winding shafts can be lifted and lowered independently by operation of a ball chain.

  A support bracket 3 and an operating device 7 are attached to both ends of a frame 2 fixed to the mounting surface via the mounting bracket 1, and two winding shafts 4 a and 4 b are provided between the support bracket 3 and the operating device 7. Is rotatably supported.

  The take-up shafts 4a and 4b are supported at positions that are spaced apart from each other in the front-rear direction at a predetermined interval in the vertical direction, and the take-up shaft 4a located above is located indoors from the take-up shaft 4b located below. Is located.

Screens 5a and 5b are suspended from the winding shafts 4a and 4b, respectively, and bottom rails 6a and 6b are suspended and supported at lower ends of the screens 5a and 5b.
The screen 5a is suspended from the winding shaft 4a toward the room interior, and the screen 5b is suspended from the winding shaft 4b toward the outdoor side. Therefore, the rotation directions of the winding shafts 4a and 4b when moving up and down the screens 5a and 5b are opposite to each other.

  An endless ball chain 8 is suspended from the operating device 7, and the winding shaft is operated by operating the ball chain 8 via the operating device 7 and clutch devices 9 a and 9 b built in one end of each of the winding shafts 4 a and 4 b. 4a and 4b are rotated.

  In the winding shafts 4a and 4b, spring motors 10a and 10b, stopper devices 11a and 11b, and governor devices 38a and 38b are arranged as automatic lifting devices that automatically lift the screens 5a and 5b, respectively. ing.

  The automatic lifting device will be described in detail. The spring motors 10a and 10b are fixed to a plug cap 13 having a proximal end side of a torsion coil spring 12 fixed to the support bracket 3, and a distal end side of the winding motor 10a and 10b. It is attached to a drive plug 14 which is fitted to the inner peripheral surface of the winding shafts 4a and 4b at the intermediate portion of the shafts 4a and 4b and rotates integrally with the winding shafts 4a and 4b.

When the winding shafts 4a and 4b are rotated in the rewinding direction of the screens 5a and 5b, the torsion coil springs 12 in the winding shafts 4a and 4b are stored.
A support cylinder 15 whose proximal end is fixed to the plug cap 13 is disposed in the torsion coil spring 12, and the stopper devices 11 a and 11 b are attached to the distal end portion of the support cylinder 15.

  The stopper devices 11a and 11b include a drum 16 that is connected to the support cylinder 15 and is non-rotatably supported, and a cap 17 that rotates integrally with the winding shaft around the drum 16. It has a function.

  That is, when the screens 5a and 5b are lowered and the ball chain 8 is released, the lifting operation of the screens 5a and 5b by the urging force of the spring motors 10a and 10b is prevented. When the ball chain 8 is pulled slightly downward from this state, the stopper operation is released, and the winding shafts 4a and 4b are rotated in the screen winding direction by the urging force of the spring motors 10a and 10b. The screens 5a and 5b are pulled up.

  Governor devices 38a and 38b are connected to the stopper devices 11a and 11b. The governor devices 38a and 38b are supported by a fixed shaft 19 protruding from the center of the case 18 so that the fixed shaft 19 is fitted to the drum 16 of the stopper devices 11a and 11b so as not to rotate. The case 18 is a cap of the stopper devices 11a and 11b. 17, and rotates together with the cap 17.

And the function which suppresses the rotational speed of the winding shafts 4a and 4b below a fixed speed at the time of raising operation of the screens 5a and 5b is provided.
In the roll blind configured as described above, when one of the ball chains 8, for example, the ball chain 8 hanging down indoors is pulled downward, the winding shaft 4a is moved to the screen 5a via the operation device 7 and the clutch device 9a. The screen 5a on the indoor side is lowered. When the ball chain 8 is released, the stopper device 11a is activated and the screen 5a is held at the lowered position.

  From this state, when the ball chain 8 hanging down indoors is slightly pulled downward, the operation of the stopper device 11a is released, and the winding shaft 4a is rotated in the screen winding direction by the urging force of the spring motor 10a. The screen 5a is pulled up.

  Further, when the ball chain 8 hanging outward is pulled downward, the winding shaft 4b is rotated in the rewinding direction of the screen 5b via the operating device 7 and the clutch device 9b, and the outdoor screen 5b is lowered. To do. When the ball chain 8 is released, the stopper device 11b is activated and the screen 5b is held at the lowered position.

  From this state, when the ball chain 8 hanging down indoors is slightly pulled downward, the operation of the stopper device 11b is released, and the winding shaft 4b is rotated in the screen winding direction by the urging force of the spring motor 10b. The screen 5b is pulled up.

  As described above, the automatic pulling device disposed in each of the winding shafts 4a and 4b includes the accumulating direction of the torsion coil spring 12 constituting the spring motors 10a and 10b and the operating direction of the stopper devices 11a and 11b. The operation is the same except that is reversed.

  The clutch devices 9a and 9b transmit rotational torque based on the operation of the ball chain 8 to the winding shafts 4a and 4b, and the rotation of the winding shafts 4a and 4b by the urging force of the spring motors 10a and 10b It is not transmitted to the chain 8.

  Next, a specific configuration of a connecting device that connects the spring motors 10a and 10b and the stopper devices 11a and 11b in the winding shafts 4a and 4b will be described. Since the connecting devices in the winding shafts 4a and 4b have the same configuration, the connecting device in the winding shaft 4a will be described.

  As shown in FIGS. 3 to 5, a flange portion 20 that engages with the inner peripheral surface of the take-up shaft 4 a is formed in the intermediate portion in the axial direction of the drive plug 14 that is formed of a synthetic resin in a substantially cylindrical shape. Has been.

  On the outer peripheral surface of the base end side of the drive plug 14, two locking portions 21 that can lock one end portion of the torsion coil spring 12 are formed symmetrically with respect to the center of the drive plug 14. Yes. As shown in FIG. 3, one end of the torsion coil spring 12 is held by the locking portion 21, and the other end of the torsion coil spring 12 is held by the support bracket 3 via the plug cap 13. Has been.

  Accordingly, when the take-up shaft 4a is rotated in the rewinding direction of the screen 5a, the drive plug 14 is rotated and the torsion coil spring 12 is stored. A base end portion of the connecting shaft 22 is fitted to an end portion of the support cylinder 15 inserted through the torsion coil spring 12, and an intermediate portion of the connecting shaft 22 is formed at an intermediate portion in the axial direction of the drive plug 14. The bearing portion 23 is inserted so as to be relatively rotatable. Therefore, the drive plug 14 rotates integrally with the take-up shaft 4a around the connecting shaft 22 that is non-rotatably fitted to the support cylinder 15.

  A bifurcated fitting piece 24 that protrudes toward the tip of the drive plug 14 is formed at the tip of the connecting shaft 22, and the tip of the fitting piece 24 has a cross-sectional shape with a return portion 25. Is formed. Further, both fitting pieces 24 are formed so that a line connecting the outer shapes thereof is substantially rectangular.

  One end of a connecting cylinder 26 is fitted to the fitting piece 24 of the connecting shaft 22 in the tip end portion of the drive plug 14. The connecting cylinder 26 is made of a synthetic resin and is formed in a cylindrical shape that is line-symmetric with respect to the longitudinal direction thereof, and fitting holes 27 having a substantially square cross section that allow the fitting pieces 24 to be inserted into both ends of the longitudinal direction. It is open.

  The fitting hole 27 is communicated with the outer peripheral surface of the connecting cylinder 26 through a locking hole 28 extending in a line symmetrical manner in the radial direction at the intermediate portion in the longitudinal direction of the connecting cylinder 26. When the fitting piece 24 is inserted into the fitting hole 27 from one of the connecting cylinders 26, the fitting piece 24 enters the fitting hole 27 while being bent in a direction approaching each other, and the return portion 25 is engaged with the locking hole 28. The connecting cylinder 26 is non-rotatably fitted to the fitting piece 24 and the return portion 25 engages with the locking hole 28 so that it cannot be easily removed.

  On the proximal end side of the drum 16 of the stopper device 11a, a square shaft-like fitting shaft 29 that can be fitted into the fitting hole 27 of the connecting cylinder 26 is formed. When the fitting shaft 29 is inserted into the fitting hole 27, the drum 16 is held in the connection cylinder 26 so as not to rotate.

  At this time, as shown in FIG. 3, the tip of the fitting shaft 29 is inserted between the fitting pieces 24. With such a configuration, the bending of the end portions of the fitting pieces 24 toward each other is prevented, and the fitting pieces 24 are prevented from coming off from the fitting holes 27.

  The cap 17 of the stopper device 11 a is formed with a cylindrical portion 30 that extends around the fitting shaft 29, and a locking projection 31 is axisymmetric with respect to the center of the cylindrical portion 30 on the outer peripheral surface of the cylindrical portion 30. It is formed in two places. Further, a protrusion 32 is provided at the center in the circumferential direction on the side surface of the locking protrusion 31 on the drum 16 side.

As shown in FIG. 4, the drive plug 14 is formed with an opening so that the locking hole 28 of the connecting cylinder 26 into which the fitting piece 24 is fitted can be seen.
An opening 33 having a diameter through which the cylindrical portion 30 can be inserted is formed at the tip of the drive plug 14, and the opening 33 has a recess that allows the locking protrusion 31 to be inserted into the opening 33. 34 is formed. A locking groove 36 that engages with the protrusion 32 is formed on the inner surface of the rib 35 positioned around the opening 33 at a position spaced apart from the recess 34 by a predetermined distance.

  Then, the cylindrical projection 30 is inserted into the drive plug 14 together with the locking projection 31 while the locking projection 31 is aligned with the recess 34, and the locking projection 31 is inserted into the rib 35. Then, the cap 17 is rotated about 50 degrees with respect to the drive plug 14 so that the protrusion 32 of the locking protrusion 31 approaches the locking groove 36 of the rib 35.

Then, the protrusion 32 engages with the locking groove 36 and the cap 17 is held so as not to easily rotate with respect to the drive plug 14.
A rib 37 that engages with the inner peripheral surface of the take-up shaft 4a is formed at the tip of the cap 17, and an attachment hole for attaching the case 18 of the governor device 38a to the rib 37 in a relatively non-rotatable manner. 39 is formed.

  As shown in FIG. 1, the case 18 of the governor device 38 a is fixed to the cap 17, and the cap 17 and the case 18 of the governor device 38 a rotate together. The input shaft 40 of the governor device 38a is non-rotatably fitted to the drum 16 of the stopper device 11a.

Next, the operation of the connecting device configured as described above will be described with respect to the winding shaft 4a.
In order to attach the stopper device 11a to the spring motor 10a, the plug cap 13, the support cylinder 15, the torsion coil spring 12 and the drive plug 14 are attached to the support bracket 3, and as shown in FIG. The connecting shaft 22 is inserted into the drive plug 14.

  Next, as shown in FIG. 7, the fitting piece 24 of the connecting shaft 22 is fitted into one fitting hole 27 of the connecting cylinder 26, and then the fitting shaft 29 of the stopper device 11a is fitted to the other fitting hole of the connecting cylinder 26. As shown in FIGS. 8 and 9, the cylindrical portion 30 and the locking projection 31 are inserted into the drive plug 14 while being inserted into the joint hole 27.

  Then, when the cap 17 of the stopper device 11a is rotated about 50 degrees in the state where the stopper device 11a and the drive plug 14 are outside the winding shaft 4a from the state shown in FIG. 10, as shown in FIG. The protrusion 32 of the protrusion 31 engages with the locking groove 36 of the drive plug 14. Then, the drum 16 of the stopper device 11 a is held on the connecting shaft 22 via the connecting cylinder 26.

  Next, when the governor device 38a is attached to the distal end side of the stopper device 11a, the assembly of the automatic pulling device is completed. Then, as shown in FIG. 1, while the drive plug 14 is engaged with the rib formed on the inner peripheral surface of the winding shaft 4a, the automatic pulling device is inserted into the winding shaft 4a, and the plug cap 13 is wound up. When fitted to the end of the shaft 4a, the assembly of the automatic lifting device to the winding shaft 4a is completed.

In the roll blind configured as described above, the following effects can be obtained.
(1) The stopper devices 11a and 11b and the governor devices 38a and 38b can be attached to the spring motors 10a and 10b via the connecting cylinder 26.
(2) The connecting cylinder 26 is non-rotatably attached to the connecting shaft 22 non-rotatably attached to the support cylinder 15 of the spring motors 10a and 10b, and the drum 16 of the stopper devices 11a and 11b is fitted into the connecting cylinder 26. Since the combined shaft 29 is non-rotatably attached, the drum 16 of the stopper device 11a can be non-rotatably supported on the support cylinder 15 of the spring motors 10a and 10b.
(3) The bifurcated fitting piece 24 formed at the tip of the connecting shaft 22 is elastically fitted into the fitting hole 27 of the connecting cylinder 26 so that the connecting shaft 22 is easily attached to the connecting cylinder 26. can do.
(4) The connection tube 26 is non-rotatably supported with respect to the connection shaft 22 by making the line connecting the outer shapes of the pair of fitting pieces 24 into a substantially rectangular shape and making the fitting hole 27 of the connection tube 26 a square hole. Can do.
(5) By fitting the rectangular fitting shaft 29 of the drum 16 of the stopper device 11a, 11b into the fitting hole 27 of the connecting cylinder 26, the drum 16 can be held unrotatable.
(6) Since the connecting cylinder 26 is formed in line symmetry, the mounting direction of the connecting cylinder 26 with respect to the connecting shaft 22 and the drum 16 is not limited. Therefore, the attaching operation for attaching the drum 16 to the connecting shaft 22 via the connecting cylinder 26 can be easily performed.

(7) Since the caps of the stopper devices 11 a and 11 b are connected to the drive plug 14, the drive plug due to the biasing force of the torsion coil spring 12 even if the spring motors 10 a and 10 b are pulled out from the winding shafts 4 a and 4 b. 14 can be blocked by the stopper devices 11a and 11b. Accordingly, even when the screens 5a and 5b are lowered, the spring motors 10a and 10b can be pulled out from the take-up shafts 4a and 4b, and the governor devices 38a and 38b can be easily replaced. Further, after the replacement of the governor devices 38a and 38b, the spring motors 10a and 10b are accommodated in the take-up shafts 4a and 4b while securing the stored force of the spring motors 10a and 10b according to the suspended height of the screens 5a and 5b. Can do.
(8) When the spring motors 10a and 10b are pulled out from the winding shafts 4a and 4b, the stopper devices 11a and 11b and the governor devices 38a and 38b are also pulled out from the winding shafts 4a and 4b. Accordingly, the stopper devices 11a and 11b and the governor devices 38a and 38b can be easily replaced.
(9) The fitting shafts 29 of the stopper devices 11a and 11b can be fitted between the fitting pieces 24 of the connecting shaft 22 to prevent the distal end portions of the fitting pieces 24 from being bent toward each other. Therefore, the fitting piece 24 can be prevented from coming off from the fitting hole 27.
(10) As shown in Patent Document 1, when the drum of the stopper device is held on the hold shaft of the operation unit so as not to rotate, the fitting shaft of the drum is formed in a square shape. In this embodiment, the drum 16 can be non-rotatably connected to the tip portions of the spring motors 10a and 10b via the connecting cylinder 26 without changing the shape of the fitting shaft.
(11) The cylindrical portion 30 of the cap 17 of the stopper device 11a, 11b is inserted into the drive plug 14 and rotated by about 50 degrees, whereby the protrusion 32 is engaged with the locking groove 36 and the cap 17 is connected to the drive plug 14 Can be held in.

(Second embodiment)
12 and 13 show a second embodiment. This embodiment shows a double roll blind in which two screens can be moved up and down independently by operating a pull cord. Portions having the same configuration and the same function as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  Pull cords 41a and 41b are suspended and supported at the intermediate portions in the longitudinal direction of the bottom rails 6a and 6b. When the pull cords 41a and 41b are pulled downward, the screens 5a and 5b are unwound from the winding shafts 4a and 4b, and the screens 5a and 5b are lowered. At this time, the spring motors 10a and 10b in the winding shafts 4a and 4b are stored.

  When the pull cords 41a and 41b are released after the screens 5a and 5b are pulled down to a desired height, the stopper devices 11a and 11b in the take-up shafts 4a and 4b are operated to hold the screens 5a and 5b at the height. The

  When the pull cords 41a and 41b are pulled slightly downward and released from this state, the operation of the stopper devices 11a and 11b is released, and the winding shafts 4a and 4b are rotated in the screen winding direction by the urging force of the spring motors 10a and 10b. Then, the screens 5a and 5b are pulled up.

  The base end portion of the spring motor 10a in the winding shaft 4a is held by the support bracket 3a on the right end side of the winding shaft 4a, and the stopper device 11a and the governor device 38a are connected to the leading end portion via a connecting cylinder 42. Supported.

  The spring motor 10b in the take-up shaft 4b has a base end portion held by a support bracket 3b on the left end side of the take-up shaft 4b, and a stopper device 11b and a governor device through a connecting cylinder 42 at the front end portion. 38b is supported.

  In the winding shafts 4a and 4b, the winding directions of the screens 5a and 5b are reversed as in the first embodiment. Thus, the base ends of the spring motors 10a and 10b are thus connected to the winding shafts 4a and 4b. If the reverse direction is 4b, it is possible to use the stopper device having the same configuration in the reverse direction to form the stopper devices 11a and 11b.

  Since each spring motor 10a, 10b has the same configuration in which the stopper devices 11a, 11b are attached to the tip portions of the spring motors 10a, 10b via the connecting cylinder 42, the configuration of the spring motor 10a will be described.

  As shown in FIG. 13, the connecting cylinder 42 is not line-symmetric in the longitudinal direction, unlike the connecting cylinder 26 of the first embodiment. Then, the fitting piece 24 of the connecting shaft 22 fitted to the support cylinder 15 of the spring motor 10a is fitted in one fitting hole 43a of the connecting cylinder 42 in a non-rotatable manner with the same configuration as in the first embodiment. Has been.

  A square shaft-shaped fitting shaft 44 extending from the drum 16 of the stopper device 11a is inserted into the other fitting hole 43b of the connecting cylinder 26 so as not to rotate, and the tip of the fitting shaft 44 has the tip of the fitting piece 24. It is inserted in between. With such a configuration, the drum 16 is held in a non-rotatable manner, and the bending of the end portions of the fitting pieces 24 toward each other is prevented, thereby preventing the fitting pieces 24 from coming off from the fitting holes 43a. Is done.

Since the fitting shaft 44 is formed to have a diameter that can be fitted between the fitting pieces 24, the fitting hole 43b has a diameter smaller than the fitting hole 43a into which the fitting piece 24 is fitted. Has been.
As in the first embodiment, the cap 17 of the stopper device 11a is held by the drive plug 14 with the engaging projection 31 provided on the cylindrical portion 30 engaging the rib 35 of the drive plug 14. Further, the locking piece 45 formed on the drum 16 is elastically engaged with the inner peripheral surface of the cap 17, and the drum 16 and the cap 17 are held so as not to be displaced in the axial direction.

  As in the first embodiment, a governor device 38a is attached to the distal end side of the cap 17. Further, the rib 37 provided on the tip end side of the cap 17 engages with the inner peripheral surface of the winding shaft 4a, and the cap 17 rotates integrally with the winding shaft 4a.

  By using the connecting cylinder 42 as described above, the stopper devices 11a and 11b and the governor devices 38a and 38b can be attached to the tip portions of the spring motors 10a and 10b, so that the first embodiment is obtained. The same effects as the effects (1) to (5) can be obtained.

If the fitting piece 24 of the connecting shaft 22 is erroneously inserted into the fitting hole 43b, the fitting piece 24 can be fitted by the protrusion 61 formed on the inner peripheral surface of the fitting hole 43b. Can not.
For example, in FIG. 14, if the fitting piece 24 is to be inserted into the fitting hole 43 b in the direction indicated by the chain line, the tip of the fitting piece 24 comes into contact with the protrusion 61 and cannot be inserted.

  Further, if the fitting piece 24 is inserted into the fitting hole 43b in the direction shown in FIG. 15, the fitting piece 24 can be slightly inserted, but the return portion 25 is brought into contact with the inner peripheral surface of the fitting hole 43b. Even if the joining pieces 24 try to bend in the direction approaching each other, the bending is blocked by the protrusion 61 and no further insertion is possible.

  Therefore, since the fitting piece 24 cannot be inserted into the fitting hole 43b, the fitting piece 24 can be definitely fitted into the fitting hole 43a.

(Third embodiment)
FIG. 16 shows a third embodiment. In this embodiment, in the double roll blind shown in the first and second embodiments, in addition to the stopper devices 11a and 11b and the governor devices 38a and 38b, a soft finish device is provided on the front end side of the spring motors 10a and 10b. Are connected to each other. The same components as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  When the screens 5a and 5b are pulled up based on the urging forces of the spring motors 10a and 10b, the soft finish device reduces the lifting speed of the screens 5a and 5b after the screens 5a and 5b are pulled up to the vicinity of the upper limit. The noise caused by the collision between the bottom rails 6a and 6b and the frame 2 is prevented.

FIG. 16 shows a unit in which the soft finish device 51 and the governor device 38a are connected to the stopper device 11a.
The soft finish device 51 is supported such that the tip of a screw shaft 53 protruding from the gear unit 52 is fitted to the drum 16 of the stopper device 11a so as not to rotate. A rotating member 54 that rotates integrally with the winding shaft 4 a is screwed to the screw shaft 53, and when the winding shaft 4 a is rotated in the winding direction of the screen 5 a, the rotating member 54 moves toward the gear unit 52. To do.

A locking projection 55 is provided on the side surface of the rotating member 54 on the gear unit 52 side, and a locking projection 57 that engages with the locking projection 55 is formed on the input body 56 of the gear unit 52.
The input body 56 is rotatably supported with respect to the gear unit 52. The rotation of the input body 56 is transmitted to a gear mechanism such as a planetary gear in the gear unit 52, and the rotation of the input body 56 is braked by the rotational resistance of the gear mechanism.

  When the screen 5a is pulled up to the vicinity of the upper limit, the locking projection 55 of the rotating member 54 engages with the locking projection 57 of the input body 56, the rotation of the winding shaft 4a is braked, and the screen 5a is slowly pulled up. It is done.

The screw shaft 53 passes through the central portion of the gear unit 52, and the fixed shaft 19 of the governor device 38a is non-rotatably fitted to the tip portion thereof.
As described above, when the fitting shaft 29 of the stopper device 11a to which the soft finish device 51 and the governor device 38a are connected is connected to the tip of the spring motor 10a via the connecting cylinder 26 as shown in the first embodiment. The automatic lifting device provided with the soft finish device 51 can be attached to the spring motor 10a.

  Further, if the spring motor 10a is pulled out from the winding shaft 4a, the stopper device 11a, the soft finish device 51, or the governor device 38a can be easily replaced.

You may implement the said embodiment in the following aspects.
-In addition to the double roll blind, the present invention can be carried out in the same manner even with a roll blind having a single winding shaft.
-It is good also as a structure which connects the governor apparatus 38a, 38b of 1st and 2nd embodiment directly to a spring motor via a connection cylinder.
-You may connect a stopper apparatus via a connection cylinder with respect to the fixed axis | shaft of the clutch apparatus of 1st and 2nd embodiment.
The stopper device may be an upper limit device that stops the rotation of the winding shaft in the screen winding direction at the screen lifting upper limit position.
-The governor device can be applied to any type as long as it has a fixed shaft and a rotating cylinder. As a means for applying rotational resistance to the rotating cylinder with respect to the fixed shaft, a mechanical type or a rubber type that opens a resistor by centrifugal force, or an oil type that applies viscous resistance to a blade may be used.
In the above-described embodiment, the end portion (bifurcated fitting piece) of the fixed shaft and the square hole of the connecting cylinder that are the square shaft and the square hole may be a polygon other than a quadrangle.

(Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. In the first to third embodiments, the connecting device mainly connects the fixed shaft of the stopper device and the fixed shaft of the spring motor. In this embodiment, the connecting device is a support bracket. The bracket shaft (fixed shaft) supported by the shaft and the mounting end (fixed shaft) of the spring motor are connected via a pipe cap (connecting cylinder). In each of the first to fourth embodiments, one of the pair of fixed shafts is inserted into the connecting cylinder and fitted, and this fitted state is held by the other of the pair of fixed shafts. It is common in the point.

  The roll blind shown in FIGS. 17 and 18 is a double roll blind in which a screen suspended from two winding shafts can be lifted and lowered independently by pull cord operation.

  Support brackets 13a and 13b are attached to both ends of the frame 12 fixed to the mounting surface via the mounting bracket 11, and the two winding shafts 14a and 14b are rotatably supported between the support brackets 13a and 13b. ing.

  The take-up shafts 14a and 14b are supported at positions that are spaced apart from each other in the front-rear direction at a certain interval in the vertical direction, and the take-up shaft 14a located above is located indoors from the take-up shaft 14b located below. Is located.

  Screens 15a and 15b are suspended from the winding shafts 14a and 14b, respectively, and bottom rails 16a and 16b are suspended and supported at lower ends of the screens 15a and 15b.

  The screen 15a is suspended from the take-up shaft 14a to the indoor side, and the screen 15b is suspended from the take-up shaft 14b to the outdoor side. Therefore, the rotation directions of the winding shafts 14a and 14b when moving up and down the screens 15a and 15b are opposite to each other.

A pull cord 17a is suspended and supported from an intermediate portion in the longitudinal direction of the bottom rail 16a, and a pull cord 17b is suspended and supported from an intermediate portion in the longitudinal direction of the bottom rail 16b.
In the winding shafts 14a and 14b, spring motors 18a and 18b, stopper devices 19a and 19b, and governor devices 20a and 20b are arranged as automatic lifting devices for automatically lifting the screens 15a and 15b, respectively. ing.

  The automatic lifting device has the same function in the take-up shafts 14a and 14b, but since the rotation directions of the take-up shafts 14a and 14b are reversed, the mounting directions on the take-up shafts 14a and 14b are reversed. Direction.

  The automatic lifting device will be described in detail. The spring motor 18a is indirectly held by a bracket shaft (not shown) in which the proximal end side of the torsion coil spring 21 is fixed to the support bracket 13a. The tip side of the torsion coil spring 21 is attached to a drive plug 23 that fits into the inner peripheral surface of the winding shaft 14a at the intermediate portion of the winding shaft 14a and rotates integrally with the winding shaft 14a. Yes.

  The spring motor 18b is indirectly held by a bracket shaft 22 whose base end side of the torsion coil spring 21 is fixed to the support bracket 13b. The front end side of the torsion coil spring 21 is attached to a drive plug 23 that fits into the inner peripheral surface of the winding shaft 14b at the intermediate portion of the winding shaft 14b and rotates integrally with the winding shaft 14b. Yes.

When the winding shafts 14a and 14b are rotated in the rewinding direction of the screens 15a and 15b, the torsion coil springs 21 in the winding shafts 14a and 14b are stored.
A support cylinder 24 whose proximal end is held by the bracket shaft 22 is disposed in the torsion coil spring 21, and the stopper devices 19 a and 19 b are attached to the distal end portion of the support cylinder 24.

  When the stopper devices 19a and 19b pull the pull cords 17a and 17b downward to move down the screens 15a and 15b and then release the pull cords 17a and 17b, the screens 15a and 19b by the urging force of the spring motors 18a and 18b are released. The pulling operation of 15b is prevented. When the pull cords 17a and 17b are pulled slightly downward from this state, the stopper operation is released, and the winding shafts 14a and 14b are rotated in the screen winding direction by the urging force of the spring motors 18a and 18b. The screens 15a and 15b are pulled up.

  Governor devices 20a and 20b are connected to the stopper devices 19a and 19b. The governor devices 20a and 20b have a function of suppressing the rotation speed of the winding shafts 14a and 14b to a predetermined speed or less when the screens 15a and 15b are pulled up.

  In the roll blind configured as described above, when the pull cord 17a is pulled downward, the winding shaft 14a is rotated in the rewinding direction of the screen 15a, and the indoor screen 15a is lowered. When the pull cord 17a is released, the stopper device 19a is activated and the screen 15a is held at the lowered position.

  From this state, when the pull cord 17a hanging down indoors is slightly pulled downward, the operation of the stopper device 19a is released, and the winding shaft 14a is rotated in the screen winding direction by the urging force of the spring motor 18a. The screen 15a is pulled up.

  Further, when the pull cord 17b is pulled downward, the winding shaft 14b is rotated in the rewinding direction of the screen 15b, and the outdoor screen 15b is lowered. Then, when the pull cord 17b is released, the stopper device 19b is activated and the screen 15b is held at the lowered position.

  When the pull cord 17b is slightly pulled downward from this state, the operation of the stopper device 19b is released, the winding shaft 14b is rotated in the screen winding direction by the urging force of the spring motor 18b, and the screen 15b is pulled up.

  Next, a spring motor mounting device for holding the base end portions of the spring motors 18a and 18b on a support bracket will be described. Since the configuration for holding the spring motors 18a and 18b on the support bracket is the same except for the difference in the support direction and the rotation direction, the configuration for holding the spring motor 18b in the winding shaft 14b on the support bracket 13b will be described.

  As shown in FIGS. 18 and 19, a mounting hole 31 is provided at the lower end of the support bracket 13 b, and a positioning hole 32 is formed above the mounting hole 31. The bracket shaft 22 is formed of synthetic resin, and a fitting projection 34 that can be fitted into the mounting hole 31 and a positioning projection 35 that can be fitted into the positioning hole 32 are formed on the side surface of the base end side. ing.

  Then, with the fitting projection 34 fitted into the mounting hole 31 and the positioning projection 35 fitted into the positioning hole 32, the screw 36 is screwed from the outer surface of the support bracket 13b, and the bracket shaft 22 is It is fixed to the support bracket 13b.

  As shown in FIG. 19, a first round shaft portion 37 is formed on a side surface of the bracket shaft 22 through a step, and a first round shaft is formed on the tip side of the first round shaft portion 37. A second round shaft 38 having a smaller diameter and the same center as the portion 37 is formed.

  On the distal end side of the second round shaft portion 38, a third round shaft portion 39 having the same center as the second round shaft portion 38 and a smaller diameter is formed. As shown in FIG. 20, locking grooves 45 extending in the axial direction are formed on the outer peripheral surface of the third round shaft portion 39 at intervals of 90 degrees with respect to the center. Further, a through hole 40 for inserting an initial winding adjusting shaft 54 described later is formed in the center portion of the bracket shaft 22. The front end side of the through hole 40 is a support hole 40a having an octagonal cross section.

  A pipe cap 41 made of synthetic resin is fitted and fixed to the end of the winding shaft 14b. The pipe cap 41 has an outer peripheral surface formed with a diameter continuous with the outer peripheral surface of the take-up shaft 14b. On the inner peripheral surface of the inner cylinder portion 42 that protrudes into the take-up shaft 14b, a circumferentially extending protrusion is provided. 43 is formed.

  The cross-sectional shape of the locking protrusion 43 extends in the vertical direction from the base end side of the pipe cap 41 toward the distal end side, and the slope 44a that gradually decreases from the top of the slope to the inner peripheral surface of the inner cylindrical portion 42. And a locking surface 44b.

  A clutch cylinder 46 made of synthetic resin is fitted to the bracket shaft 22 in the inner cylinder portion 42 of the pipe cap 41. The clutch tube 46 is formed in a cylindrical shape at the distal end side, and a cylindrical portion 47 having an octagonal cross section that is non-rotatably inserted into the support hole 40a of the bracket shaft 22 is formed in the central portion on the proximal end side. ing.

  And the cylinder part 47 is inserted by the support hole 40a, and is hold | maintained at the bracket shaft 22 so that rotation is impossible. Further, a split groove 48 is formed in the cylindrical portion 47 so as to be elastically expandable, and a locking portion that opens by reducing the inner diameter of the cylindrical portion 47 at the proximal end of the clutch cylinder 46. 49 is formed.

  Four locking pieces 50 are formed on the outer peripheral side of the cylindrical portion 47 so as to extend along the cylindrical portion 47 to an intermediate portion in the axial direction of the cylindrical portion 47. The locking pieces 50 are formed at intervals of 90 degrees with respect to the center portion of the clutch cylinder 46 and can be inserted into the locking grooves 45 of the bracket shaft 22.

  Further, a return portion 51 protruding outward in the radial direction is formed at the tip of the locking piece 50 and can be engaged with the locking protrusion 43 of the pipe cap 41. That is, when the locking piece 50 is inserted into the inner cylindrical portion 42 of the pipe cap 41 without the locking piece 50 being inserted into the locking groove 45 of the bracket shaft 22, the locking piece 50 is bent inward. Overcoming the slope 44a of the locking ridge 43, the return portion 51 engages with the locking surface 44b. Then, the pipe cap 41 is held rotatably with respect to the clutch cylinder 46.

  A clutch spring 52 formed of a torsion coil spring is mounted on the inner peripheral surface on the front end side of the clutch cylinder 46. Both end portions of the clutch spring 52 are bent toward the center of the clutch cylinder 46.

  The holding plug 53 that supports the proximal end portion of the torsion coil spring 21 of the spring motor 18 b is formed in a cylindrical shape that allows the support tube 24 to be inserted on the distal end side, and the central portion on the proximal end side of the holding plug 53. The tip of the initial winding adjustment shaft 54 formed in a cylindrical shape with metal is rotatably supported.

  A screw hole 55 is opened at the distal end of the initial winding adjustment shaft 54, and a hexagon hole 56 through which a hexagon wrench can be inserted is opened at the proximal end of the initial winding adjustment shaft 54. An operation groove 57 is formed at the base end of the initial winding adjusting shaft 54 so that a minus driver can be engaged.

The initial winding adjustment shaft 54 is held in the holding plug 53 so as not to move in the axial direction by a screw 58 screwed into the screw hole 55 of the initial winding adjustment shaft 54 from the holding plug 53.
A base end portion of the initial winding adjustment shaft 54 is rotatably fitted in a cylinder portion 47 of the clutch cylinder 46, and a locking portion 49 formed in the cylinder portion 47 of the clutch cylinder 46 in the vicinity of the base end. An engaging groove 59 to be engaged is formed.

  When the base end portion of the initial winding adjustment shaft 54 is inserted into the cylinder portion 47 from the distal end side of the clutch cylinder 46 before the cylinder portion 47 of the clutch cylinder 46 is fitted into the support hole 40a of the bracket shaft 22, the cylinder portion The latching portion 49 of 47 is elastically engaged with the engaging groove 59 so that the clutch cylinder 46 and the initial winding adjusting shaft 54 are positioned in the axial direction.

  A driving piece 60 that protrudes radially inside the clutch spring 52 is formed at the tip of the initial winding adjusting shaft 54. When a hexagon wrench is inserted into the hexagon hole 56 of the initial winding adjustment shaft 54 and the initial winding adjustment shaft 54 is rotated, the drive piece 60 comes into contact with the end of the clutch spring 52 and the clutch spring 52 and the clutch cylinder 46 Works to reduce friction.

  A driven piece 61 extending from the holding plug 53 is projected on the rotation locus of the drive piece 60. Therefore, when the initial winding adjustment shaft 54 is rotated, the clutch spring 52 and the holding plug 53 are rotated together with the initial winding adjustment shaft 54.

Next, the operation of the spring motor mounting device configured as described above will be described.
In order to hold the base end portion of the spring motor 18b to the support bracket 13b, the tip end portion of the initial winding adjusting shaft 54 is attached to the holding plug 53 with a screw 58 and the clutch spring 52 is mounted as shown in FIG. The clutch cylinder 46 thus fitted is fitted to the initial winding adjustment shaft 54. Then, the support cylinder 24 and the torsion coil spring 21 are attached to the holding plug 53 to assemble the spring motor 18b.

  Next, the tip of the spring motor 18b is inserted into the winding shaft 14b. When the locking protrusion 43 of the pipe cap 41 is engaged with the locking piece 50 of the clutch cylinder 46, the pipe cap 41 is held rotatably with respect to the clutch cylinder 46. In this state, the pipe cap 41 is fitted to the end of the winding shaft 14b as shown in FIG.

  Next, the second round shaft portion 38 of the bracket shaft 22 attached to the support bracket 13 b is inserted into the pipe cap 41, and the locking piece 50 of the clutch cylinder 46 is inserted into the locking groove 45 formed in the third round shaft portion 39. Engage.

  Then, as shown in FIG. 19, the clutch cylinder 46 is rotatably supported by the bracket shaft 22, and the locking piece 50 comes close to the locking groove 45, so that the locking cylinder 50 has a central direction of the clutch cylinder 46. Is prevented from bending.

In this state, the pipe cap 41 is held so as not to be detached from the clutch cylinder 46, and the winding shaft 14b is rotatably supported by the bracket shaft 22.
The clutch cylinder 46 is supported by the bracket shaft 22 so as not to rotate. When the driving piece 60 of the holding plug 53 comes into contact with one end of the clutch spring 52 by the biasing force of the torsion coil spring 21, the clutch spring 52. And the friction between the clutch cylinder 46 increase. Accordingly, the rotation of the holding plug 53 due to the urging force of the torsion coil spring 21 is prevented.

  When a hexagon wrench is inserted into the hexagon hole 56 of the initial winding adjustment shaft 54 and rotated, the initial winding adjustment shaft 54 is rotated. Then, the drive piece 60 comes into contact with one of the end portions of the clutch spring 52 to reduce friction between the clutch spring 52 and the clutch cylinder 46, and the clutch spring 52 and the holding plug 53 are rotated with the rotation of the initial winding adjusting shaft 54. Are rotated together.

  As a result, the initial torque of the torsion coil spring 21 can be adjusted by rotating the initial winding adjusting shaft 54 to adjust the driving force of the spring motor 18b according to the weight of the screen 15b.

  In order to remove the spring motor 18b from the winding shaft 14b, first, the bracket shaft 22 is pulled out from the pipe cap 41. Then, since a space is formed inside the locking piece 50 of the clutch cylinder 46, the locking piece 50 of the clutch cylinder 46 can be bent inward so that the pipe cap 41 can be detached from the winding shaft 14b and the clutch cylinder 46. When the pipe cap 41 is removed from the winding shaft 14b, the spring motor 18b can be removed from the winding shaft 14b.

With the spring motor mounting device for a roll blind configured as described above, the following effects can be obtained.
(1) When the second and third round shaft portions 38 and 39 of the bracket shaft 22 are removed from the pipe cap 41, the pipe cap 41 can be easily detached from the winding shaft 14b and the spring motor 18b.
(2) The pipe cap 41 can be easily detached from the winding shaft 14b and the spring motor 18b without the need for a tool.
(3) By fitting the pipe cap 41 elastically to the locking piece 50 of the clutch cylinder 46 attached to the end of the spring motor 18b and inserting the bracket shaft 22 inside the locking piece 50, The pipe cap 41 and the spring motor 18b can be easily connected without requiring a tool.
(4) Even when the pipe cap 41 is changed according to the color of the screen 15b, the pipe cap 41 can be easily attached and detached.

You may implement the said embodiment in the following aspects.
-The locking piece of the clutch cylinder 46 and the locking groove of the bracket shaft 22 may be at least one each.
The bottom surface of the locking groove of the bracket shaft 22 may be a convex curved surface having the same center as the outer peripheral surface of the bracket shaft 22, and the locking piece of the clutch cylinder 46 may be curved along the convex curved surface.
The locking piece 50 of the pipe cap 41 and the clutch cylinder 46 may be changed to a configuration that enables elastic engagement with each other in addition to the locking protrusion 43 and the return portion 51.

(Fifth embodiment)
Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. In the first to fourth embodiments, the connecting device inserts and fits one of the pair of fixed shafts into one opening of the connecting tube, and inserts the other of the pair of fixed shafts into the other opening of the connecting tube. Then, the fitting state between one of the fixed shafts and the connecting cylinder is maintained. In this embodiment, (1) the connecting device connects the rotating shafts instead of the fixed shafts. (2) Both of the pair of shafts are different from the above-described embodiment in that they are inserted from one opening of the connecting cylinder.

  An embodiment of a roll blind embodying the present invention will be described below with reference to the drawings. The double roll blind shown in FIG. 23 includes two winding shafts 4 a, between the operating device 2 attached to one end of the frame 1 and the mounting bracket 3 attached to the other end of the frame 1. 4b is rotatably supported.

  The take-up shafts 4a and 4b are supported while being shifted in the front-rear direction and the up-and-down direction, and the screen 5a is suspended and supported from the take-up shaft 4a located below and behind, and from the take-up shaft 4b located above and ahead The screen 5b is suspended and supported in front of the screen 5a. Weight bars 6a and 6b are attached to the lower ends of the screens 5a and 5b, respectively.

  A pulley 8 is rotatably supported in the case 7 of the operating device 2, and an endless ball chain 9 is hooked on the pulley 8. The pulley 8 can be rotated in forward and reverse directions by operating the ball chain 9.

  The ball chain 9 is connected endlessly via a joint 9a having the same shape as other balls. When a force greater than the pulling force acting during normal operation is applied, such as when the operator is caught on the ball chain 9, the joint 9a is cut to ensure safety.

  A gear mechanism for transmitting the rotation of the pulley 8 to the winding shafts 4a and 4b is disposed in the case 7. Then, for example, when the ball chain 9 hanging down indoors is pulled downward, the winding shaft 4b can be rotated in the downward direction of the screen 5b, and when the ball chain 9 hanging down outdoor is pulled down, The winding shaft 4a can be rotated in the downward direction of the screen 5a.

  The winding shafts 4a and 4b are formed of an aluminum shape, and a pipe cap 10 is fitted to one end thereof as shown in FIG. And the clutch apparatus 11 and the torque limiter 12 are accommodated in the pipe cap 10, respectively.

  The clutch device 11 rotates the winding shafts 4a and 4b only in the screen lowering direction based on the operation of the ball chain 9, and the torque limiter 12 reversely winds the screens 5a and 5b around the winding shafts 4a and 4b. Is to prevent.

  Since the clutch device 11 and the torque limiter 12 disposed on the winding shafts 4a and 4b have the same configuration, the clutch device 11 and the torque limiter 12 disposed on the winding shaft 4a will be described in detail.

  When the input shaft is rotated in the screen rewinding direction based on the rotation of the pulley 8, the clutch device 11 slides the slide member 81, and the locking portion 82 provided on the slide member 81 and the output shaft 17 side. The engaging portion 83 engages. Then, the output shaft 17 is rotated in the screen rewind direction.

  When the input shaft is rotated in the screen winding direction based on the rotation of the pulley 8, the slide member 81 does not slide and the output shaft 17 does not rotate. As shown in FIGS. 25 and 26, the pipe cap 10 is formed in a cylindrical shape that can be fitted into the take-up shaft 4a, and the diameter of the opening on the base end side, that is, the end side of the take-up shaft 4a. Is formed with a diameter larger than the diameter of the opening on the tip side.

  The pipe cap 10 is provided with a plurality of protrusions 85 in the circumferential direction that engage with the ribs formed on the inner peripheral surfaces of the winding shafts 4a and 4b except for the base end portion, and with respect to the winding shafts 4a and 4b. They are fitted so as to rotate together.

  Further, a finger hooking recess 84 is formed on the outer peripheral surface of the base end portion of the pipe cap 10, and a cloth presser (not shown) for attaching the screens 5a, 5b to the winding shafts 4a, 4b with respect to the winding shafts 4a, 4b. It is easily removable.

  The torque limiter 12 is accommodated on the distal end side of the pipe cap 10. The torque limiter 12 includes a pipe cap shaft 13, a moving piece 14, and a coil spring 15.

  The pipe cap shaft 13 is formed in a round shaft shape, and a hexagonal hole 16 is opened on the base end side. Then, the output shaft 17 of the clutch device 11 can be fitted into the hexagonal hole 16.

  A flange 18 is formed at an axially intermediate portion of the pipe cap shaft 13, and irregularities 19 are formed on the side surface on the front end side of the flange 18 at equal intervals in the circumferential direction.

  On the outer peripheral surface of the tip end of the pipe cap shaft 13, two locking projections 20 that are engaged with the peripheral edge portion of the end opening 21 of the pipe cap 10 are formed symmetrically with respect to the axial center of the pipe cap shaft 13. Has been. Then, when the tip of the pipe cap shaft 13 is inserted into the opening 21 from the inside of the pipe cap 10, as shown in FIG. 25, the locking projection 20 is engaged with the opening 21, and the pipe cap shaft 13 The tip is held in the opening 21.

  As shown in FIG. 25 (the same cross section as the BB plane in FIG. 27) and FIG. 27, an opening 30 communicating with the hexagonal hole 16 is formed on the tip end side of the pipe cap shaft 13. A rib 31 is formed on the inner peripheral surface at a position on the radially inner side of the locking projection 20. The height of the rib 31 is slightly higher than the inner peripheral surface 35 of the hexagonal hole 17 as shown in FIG. And as shown in FIG. 24 (the same cross section as the AA plane of FIG. 27), the tip of the output shaft 17 of the clutch device 11 extends to the radially inner position of the locking projection 20. The output shaft 17 contacts the rib 31 and the rib 31 and the locking projection 20 are pressed outward in the radial direction. This prevents the engagement between the locking projection 20 and the opening 21 from being released.

  As shown in FIGS. 26 and 27, slits 33 are formed on both sides of the locking projection 20 in the circumferential direction. Thereby, when engaging the locking projection 20 with the opening 21, the portion sandwiched between the slits 33 is easily bent, and the locking projection 20 is engaged with the opening 21 without applying a strong force. Can be made. As a result, the assemblability is improved.

  Note that the ribs 31 are not necessarily required. For example, as shown in FIG. 28, if the apex of the output shaft 17 having a hexagonal cross section is in contact with the inner peripheral surface of the opening 30, the height adjustment is not necessary. Even if the rib 31 is not provided, it is possible to prevent the engagement between the locking projection 20 and the opening 21 from being released.

  The moving piece 14 is formed in a cylindrical shape having an inner diameter slightly larger than the diameter of the pipe cap shaft 13, and can accommodate the coil spring 15 between the pipe cap shaft 13 and the inner peripheral surface of the moving piece 14. It has become.

  A locking piece 23 having an opening 22 having a diameter through which the pipe cap shaft 13 can be inserted in a relatively rotatable manner is formed at the base end edge of the moving piece 14. An uneven portion 24 that engages with the uneven portion 19 is formed on the side surface of the locking piece 23 that faces the uneven portion 19 of the pipe cap shaft 13.

  The coil spring 15 is disposed between the locking piece 23 and the peripheral portion of the opening 21 of the pipe cap 10, and the concave and convex portions of the moving piece 14 are urged by the urging force of the coil spring 15 with the pipe cap 10 as a fulcrum. The portion 24 is brought into pressure contact with the concavo-convex portion 19 of the pipe cap shaft 13 to be engaged therewith.

  The concave and convex portions 19 and 24 are formed such that the side surfaces of the convex portions are inclined surfaces having the same inclination so that the cross-sectional shape of the convex portions is trapezoidal. When the rotational torque acting between the pipe cap shaft 13 and the moving piece 14 exceeds the frictional force generated between the concave and convex portions 19 and 24 based on the biasing force of the coil spring 15, the moving piece 14 and the pipe cap The shaft 13 rotates freely with respect to each other.

  On the outer peripheral surface of the moving piece 14, a plurality of irregularities are formed at equal intervals in the circumferential direction to form an irregularity portion 25, and the irregularities that mesh with the irregularity portion 25 on the tip side of the inner circumferential surface of the pipe cap 10. A portion 26 is formed. The moving piece 14 is held in a state in which the concave and convex portions 25 and 26 are engaged with each other at the tip portion in the pipe cap 10. Therefore, the moving piece 14 and the pipe cap 10 rotate integrally.

  In order to assemble such a torque limiter 12, the distal end side of the pipe cap shaft 13 is inserted into the proximal end side of the moving piece 14, and the concave and convex portions 19 and 24 are engaged with each other. Then, the coil spring 15 is inserted into the moving piece 14, and in this state, the tip of the pipe cap shaft 13 is inserted from the inside of the pipe cap 10 into the opening 21 on the tip side. Then, the locking projection 20 is engaged with the outer surface of the opening 21, and the pipe cap shaft 13, the moving piece 14 and the coil spring 15 are held in the pipe cap 10. Since the slits 33 are formed on both sides in the circumferential direction of the locking projection 20, the portion where the locking projection 20 is formed is easily bent, and the engagement projection 20 can be applied without applying a large force. The part can be engaged with the outer surface of the opening 21.

  The pipe cap 10 thus attached with the torque limiter 12 is fitted to one end of the winding shaft 4a, and the output shaft 17 of the clutch device 11 is rotated relative to the hexagonal hole 16 of the pipe cap shaft 13 within the pipe cap 10. Mating impossible. At this time, the distal end of the output shaft 17 is positioned radially inward of the engaging protrusion 20 of the pipe cap shaft 13, so that bending of the portion where the locking protrusion 20 is formed is prevented, and the locking protrusion Disengagement between the portion 20 and the outer surface of the opening 21 is prevented.

  Next, the input shaft of the clutch device 11 is connected to the output shaft of the gear mechanism of the operating device 2. Then, as shown in FIG. 24, the clutch device 11 is accommodated in the pipe cap 10.

(Codes in the first to third embodiments)
4a, 4b ... rotating cylinder (winding shaft), 10a, 10b ... first rotating cylinder driving device (spring motor), 11a, 11b ... second rotating cylinder driving device (stopper device), 15 ... fixed shaft (support cylinder), 17 ... rotating body (cap), 24 ... fitting piece, 26 ... connecting cylinder, 27 ... square hole (fitting hole), 29. .. Fixed shaft (fitting shaft)

(Code in the fourth embodiment)
13a, 13b ... support bracket, 14a, 14b ... take-up shaft, 15a, 15b ... screen, 18a, 18b ... spring motor, 21 ... torsion coil spring, 22 ... Bracket shaft, 39 ... shaft portion (third round shaft portion), 46 ... mounting end portion (clutch cylinder), 45 ... fitting holding means (locking groove), 50 ... locking piece, 51 ... engaging means (return part), 53 ... mounting end (holding plug).

(Codes in the fifth embodiment)
2 ... Operation device, 3 ... Mounting bracket, 4a, 4b ... Winding shaft, 5a, 5b ... Screen, 9 ... Operation cord (ball chain), 10 ... Pipe cap, DESCRIPTION OF SYMBOLS 11 ... Clutch apparatus, 12 ... Torque limiter, 13 ... Pipe cap shaft, 14 ... Moving piece, 15 ... Energizing means (coil spring), 19 ... First uneven part 24 ... second uneven part, 25 ... third uneven part, 31 ... rib, 33 ... slit, 74 ... adjustment device (adjustment axis).

Claims (20)

In a roll blind coupling device that couples a pair of shafts to each other via a coupling cylinder,
The connecting cylinder has an opening;
A fitting portion provided on one of the pair of shafts is elastically fitted to the connecting cylinder,
The other of the pair of shafts is arranged at a position to prevent the fitting portion from being bent, and the fitting portion is held at the engagement position with the connecting cylinder ,
The pair one and the other of the shaft is inserted into the coupling tube, said pair of one of the shaft coupling apparatus roller blind, characterized in that contact with the other of the pair of shafts. In a roll blind coupling device that couples a pair of shafts to each other via a coupling cylinder,
The connecting cylinder has an opening;
A fitting portion provided on one of the pair of shafts is elastically fitted to the connecting cylinder,
The other of the pair of shafts is arranged at a position to prevent the fitting portion from being bent, and the fitting portion is held at the engagement position with the connecting cylinder ,
One of the pair of shafts is a fixed shaft of a spring motor of the roll blind,
The other of the pair of shaft coupling device roller blind, which is a fixed shaft of a device for stopping the roller blind. The fitting portion is a bifurcated fitting piece provided at one end of the pair of shafts, and a line connecting the outer shapes is a square axis,
The connecting cylinder has square holes at both ends,
The fitting piece is elastically and non-rotatably fitted into one square hole of the connecting cylinder,
2. The other of the pair of shafts is non-rotatably fitted in the other square hole of the connecting cylinder and holds the fitting piece in an engagement position with the connecting cylinder. Or the connection apparatus of the roll blind of Claim 2 . The connecting device is provided in the rotating cylinder, and is a roller blind that connects a pair of rotating cylinder driving devices including a rotating body that rotates integrally with the rotating cylinder and a fixed shaft that is positioned at the rotation center of the rotating body. A connecting device of
4. The roller blind coupling device according to claim 3 , wherein each of the pair of shafts is a fixed shaft of each of the pair of rotary cylinder driving devices. 5. The roller blind coupling device according to claim 4 , wherein the rotating cylinder is a winding shaft, and one of the rotating cylinder driving devices is a stopper device. 6. The roller blind connecting device according to claim 5 , wherein a connecting shaft provided with the fitting piece is attached to an end portion of a support cylinder inserted through a spring motor provided in the winding shaft. The connecting device according to claim 6, wherein a governor device is connected to the stopper device. The roll blind connecting device according to claim 6, wherein a soft finish device and a governor device are connected to the stopper device. Claims, characterized in that the tip of the fitting piece is formed on鏃状, provided a longitudinal central locking hole of the tip of the fitting pieces was resiliently fitted to portion of the coupling tube 5. A roller blind coupling device according to 5. The roll blind coupling device according to claim 9 , wherein the coupling cylinder is formed in a line symmetrical shape in the axial direction. A protrusion is provided at one end of the connecting tube to prevent the fitting piece from being inserted, and is engaged with the fitting piece inserted from the other end of the connecting tube at a position away from the longitudinal center of the connecting tube. The roll blind coupling device according to claim 9, wherein a locking hole is provided. The roll blind coupling device according to claim 9 or 11 , wherein an opening is provided in the drive plug of the spring motor so that the locking hole is visible. The coupling device includes a spring motor having one end held by the support bracket in a winding shaft rotatably supported by a support bracket, and the winding shaft is moved in the screen winding direction by the urging force of the spring motor. It is a roller blind coupling device that rotates to
One of the shafts is a bracket shaft fixed to the support bracket,
The other of the shafts is an attachment end of the spring motor,
The connecting cylinder is a pipe cap that is fitted to an end of the winding shaft and elastically fitted to the attachment end.
The roll blind coupling device according to claim 1, wherein the bracket shaft is provided with fitting holding means for holding fitting between the pipe cap and the attachment end. The attachment end portion is provided with a plurality of locking pieces that are non-rotatably fitted to the bracket shaft, and the locking pieces are provided with engagement means that elastically engages the pipe cap. The roll blind coupling device according to claim 13 . The fitting holding means is provided with a locking groove on the bracket shaft for supporting the locking piece in a non-rotatable manner and holding the locking piece at a position for engaging the pipe cap. The roll blind connecting device according to claim 14 . The bracket shaft includes a shaft portion inserted between the locking pieces in a state where the locking pieces are engaged with the pipe cap,
The roll blind coupling device according to claim 15 , wherein the locking groove is provided in the shaft portion . The coupling device includes a pipe cap attached to one end of a winding shaft that is rotatably supported by a support bracket;
A roll blind coupling device including a torque limiter for limiting a transmission torque from an output shaft rotating by an operation of an operation cord to the pipe cap;
The torque limiter includes a pipe cap shaft having a through hole into which the output shaft can be fitted,
The pipe cap shaft has a locking projection that engages with the pipe cap,
One of the shafts is the pipe cap shaft;
The other of the shafts is the output shaft,
The connecting cylinder is the pipe cap;
2. The roll blind coupling device according to claim 1, wherein the output shaft is disposed at a position where the output shaft is inserted into the through-hole and prevents the pipe cap shaft from being bent at the locking projection. 3. The pipe cap shaft is provided with a rib on the inner peripheral surface of the through hole, the ribs, by the insertion of the output shaft of claim 17 which is provided at a position where the locking projection is pressed against the radially outward Rolling blind coupling device. The roll blind coupling device according to claim 17 or 18 , wherein the pipe cap shaft has a slit at a position that facilitates bending of a portion where the locking projection is provided. A roll blind comprising the roll blind coupling device according to any one of claims 1 to 19 .