JPH0215984Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to a slat drive device for a blind.

(Prior Art) Glass windows installed over one or more floors of high-rise buildings are equipped with long blinds vertically, and the blinds have a large number of slats supported by a support frame, and the support frame is attached to the window frame. movably supported. An operating means for driving the slats of the blind is provided on the window frame, and a slat drive shaft rotatably supported within the support frame can be engaged with and detached from the operating means.

(Problem to be solved by the invention) In the above blind, one end of the slat drive shaft is inserted into and engaged with the operating means, and the drive shaft is rotationally driven by the operation of the operating means. may come off from the operating means. In particular, when an electric motor is used to drive the operating means to raise and lower a vertically long blind as described above, there is a high possibility that the drive shaft will come off the operating means.

Structure of the invention (means for solving the problems) In order to solve the above problems, this invention attaches a connecting shaft 34 to one end of the drive shaft 19, and connects the connecting shaft 34 to the slat of the window frame 10. The connecting shaft 34 is biased towards the slat operating means 23 by the biasing means 30.

(Function) With the above means, the connecting shaft 34 connecting the drive shaft 19 and the slat operating means 23 is reliably engaged with the operating means 23 by the biasing means 38.

(Example) An example embodying this invention will be described below with reference to the drawings. In Fig. 1, the blind is divided into two vertically, and both ends of the slats 2 are rotatable on the support frame 1 on the square frame. The second blind 7 has a plurality of slats 6 suspended from a lower stile 4 of the support frame 1 by means of ladder cords 5.

In the first blind 3, a guide piece 9 provided on the side surface of the stile 8 of the support frame 1 is guided by a guide groove (not shown) provided in the window frame 10, as shown in FIGS.
As shown in the figure, it is provided so as to be able to move up and down along the window frame 10, but it is always held at the predetermined position shown in FIG. 1 by a stopper 11 provided at the bottom of the vertical stile 8.

A lifting cord 12 passes through the slat 6 of the second blind 7, and the upper end of the lifting cord 12 is supported by a drive shaft 19 (described later) provided in the lower stile 4 of the support frame 1, and the drive shaft 19 is rotated. By doing so, the bottom rail 13 can be raised and lowered, and each slat 6 can be raised and lowered. Further, one window frame 10 is provided with an operation dial 14 for rotating this drive shaft 19, and by operating the operation dial 14, the first and second blinds 3,
The angle of the slats 2 and 6 of the second blind 7 is adjusted in conjunction with each other, and the slat 6 of the second blind 7 can be raised and lowered.

The slat angle adjustment devices of the first and second blinds 3 and 7 and the slat lifting device of the second blind 7 will be explained next.The slats 2 of the first blind 3 are arranged at both ends as shown in FIG. is fitted onto a support shaft 15, and the support shaft 15 is rotatably and axially movably supported by the vertical stile 8 of the support frame 1. A coil spring is disposed between the flange portion 16 at the tip of the support shaft 15 and the vertical stile 8, and the slat 2 is prevented from loosening by urging the vertical stile 8 outward. ing. A large number of support shafts 1 are supported vertically on the vertical stile 8.
5 are connected by a ladder-like link 18, and the link 18 is configured to move up and down as a drive shaft 19, which will be described later, rotates. As the link 18 moves up and down, the support shaft 15 is rotated and the slat 2 is rotated.

A hexagonal bar-shaped drive shaft 19 is located inside the lower stile 4 of the support frame 1.
is rotatably supported, and a winding tube 20 for winding up the lifting cord 12 of the second blind 7 is fitted onto the drive shaft 19 except for both ends thereof. The winding cylinder 20 rotates together with the drive shaft 19, and as the winding cylinder 20 rotates, it moves in the axial direction with respect to the drive shaft 19 as shown by the chain line in FIG. 4 by a known slide mechanism (not shown). I'm starting to do that.

The upper end of the lifting cord 12 is fixed to the winding cylinder 20, and the lifting cord 12 is sequentially wound around the winding cylinder 20, which rotates while moving in the axial direction by the rotation of the drive shaft 19. Also, the upper end of the ladder cord 5 is connected to the hanging member 2 in the winding tube 20.
The suspension member 21 is rotated by the rotation of the winding tube 20, and the slat 6 of the second blind 7 is rotated via the ladder cord 5. After the slat 6 is rotated almost vertically, the winding tube 20 rotates idly relative to the hanging member 21, so that the slat 6 is not rotated any further. Note that the hanging member 21 is designed not to follow the movement of the winding cylinder 20 in the axial direction.

A coupling device 22 is provided at one end of the drive shaft 19, and connects the drive shaft 19 to a transmission sprocket 23 rotatably supported within the window frame 10, so that as the transmission sprocket 23 rotates, the drive shaft 19 It is designed to rotate. The detailed structure of the connecting device 22 will be explained with reference to FIGS. 7 and 8. A support member 24 is housed at one end of the lower stile 4 so as to be able to move slightly laterally within the lower stile 4. That is, a lock member 25 is rotatably supported between the lower surface of the support member 24 and the bottom side of the lower stile 4, and when the lock member 25 is in the rotational position shown by the solid line in FIG. The support member 24 is fixed immovably to the lower frame 4 by engaging one of the two locking holes 26, and the lock member 25 is rotated 90 degrees as shown by the chain line in the same figure. The support member 24 is movable within the guide hole 27 between the two locking holes 26, and is movable relative to the lower stile 4 between the two locking holes 26.

A through hole 28 is provided in the center of the support member 24, and a first connecting shaft 29 is fitted into the through hole 28 so as to be rotatable and immovable in the axial direction. That is, the through hole 28 is provided with a reduced diameter portion 30 at its base end, and the first connecting shaft 29 has a flange portion 31 that engages with the reduced diameter portion 30 and the support member 24 .
It is immovable in the axial direction with respect to the support member 24 with a C ring 32 fitted on the outside.

A second connecting shaft 34 is connected to the first connecting shaft 29 via a connecting cylinder 33 . Second connecting shaft 3
4 is provided with a spline 35 except for its base end, and an insertion hole 36 is provided at the distal end of the connecting tube 33 through which only the spline portion can be inserted. The second connecting shaft 34 is connected to the seventh connecting cylinder 33.
It is fitted in the direction of arrow A in the figure, and is capable of protruding and retracting from the connecting tube 33 except for its base end.

The base end of the connecting cylinder 33 into which the second connecting shaft 34 is fitted as described above is fitted into the first connecting shaft 29, and is fixed by a spring 37 so as to be immovable and relatively non-rotatable. A coil spring 38 is disposed between the two connecting shafts 29 and 34 in the connecting cylinder 33, and the second connecting shaft 34 is always supported by the urging force of the coil spring 38 with the first connecting shaft 29 as a fulcrum. is biased in the direction of arrow A.

The connecting device 22 configured as described above can be used while the support frame 1 is held at the predetermined position shown in FIG.
Operate the lock member 25 to move the support member 24 to the lower stile 4.
When the second connecting shaft 34 is moved from side to side, the tip of the second connecting shaft 34 protrudes and retracts from one end of the lower stile. That is, as shown in FIGS. 4 and 7, if the support member 24 is moved to the transmission sprocket 23 side of the window frame 10 and fixed, the second connecting shaft 34 will have its tip end close to the transmission sprocket 23 inside the window frame 10. When the support member 24 is retracted, the second connecting shaft 34 is fitted into the vertical frame 8 of the support frame 1.
Then, the second connecting shaft 34 connects to the transmission sprocket 2.
When the transmission sprocket 23 is rotated in a state where the transmission sprocket 3 is fitted, the drive shaft 19 is rotated via the second connection shaft 34, the connection cylinder 33, and the first connection shaft 29.

A timing clutch 39 is attached to the second connecting shaft 34 at one end of the lower stile, and the link 18 of the first blind 3 is connected to the timing clutch 39, so that the rotation of the second connecting shaft 34 is coupled to the timing clutch 39. The slats 2 of the first blind 3 are rotated accordingly. The structure of the timing clutch 39 will be explained based on FIGS. 5 and 6. Case 40 of the timing clutch 39
is fixed within the lower stile 4, and a timing shaft 41 having a second connecting shaft 34 fitted in a relatively non-rotatable manner to the case 40 is rotatably supported.

A clutch spring 42 is wound around the outer periphery of the timing shaft 41, and a transmission ring 43 is rotatably fitted therein. As shown in FIG.
An arm 44 is formed that is located outside the radial direction and projects symmetrically in the radial direction, and the link 1 is attached to the arm 44.
The lower end of 8 is fixed. The clutch spring 42 has contact ends 45 formed by protruding in the radial direction in a hook shape at both ends thereof, and engages with a locking end 46 of the transmission ring body 43. Then, when the second connecting shaft 34 rotates and the timing shaft 41 rotates, the clutch spring 42 rotates together with the timing shaft 41, and its abutting end 45 pushes the locking end 46 of the transmission ring body 43, causing the clutch spring 42 to rotate together with the timing shaft 41. The transmission ring body 43 is rotated.

As shown in FIG. 6, a stopper 47 is integrally formed in the case 40 and is positioned on the rotation locus of the clutch spring abutting end 45. As shown in FIG. When the contact end 45 of the clutch spring 42, which rotates together with the timing shaft 41, comes into contact with this stopper 47 as shown by the chain line in the figure, the diameter of the clutch spring 4 is expanded and the timing shaft 4
1 is designed to idle around the clutch spring 42. Therefore, no matter which direction the timing shaft 41 is rotated, after the abutting end 45 abuts the stopper 47, the rotation of the timing shaft 41 is no longer transmitted to the transmission ring 43, so that the first blind 3 The slat 2 is configured so that it cannot be rotated beyond a predetermined angle. Incidentally, when the abutting end 45 abuts against the stopper 47, the slat 2 of the first blind 3 is set to be vertically closed.

A timing clutch 39 as described above is also provided at the other end of the drive shaft 19 and is connected to the link 18 of the first blind 3.
are connected. And the first blind 3
The links 18 provided in the vertical stile 8 of the support frame 1 are driven by the rotation of the drive shaft 19 through timing clutches 39, so that the angles of the slats 2 are adjusted in the same phase. Also, at this time, the second blind 7 is rotated by the rotation of the drive shaft 19.
The angle of the slat 6 is also adjusted in synchronization, but its phase is set to match that of the first blind 3.

In the vicinity of the coupling device 22, the drive shaft 19
A brake device 48 is attached to the vehicle. This brake device 48 utilizes the frictional force of a spring similarly to the timing clutch 39, and rotates the drive shaft 19 in the downward direction of the slat 6 of the second blind 7 due to the weight of the slat 6 of the second blind 7 and the bottom rail 13. This is for holding the slats 6 of the second blind 7 in any position.

In the window frame 10, the transmission sprocket 23 that fits into the second connection shaft 34 is connected to the operation dial 1.
It is rotationally driven via a belt 50 by a drive device 49 operated at 4. The drive device is shown in Figure 9~
Explaining based on FIG. 12, the drive device 49 fixed to the window frame 10 has a drive shaft 6 attached to its case 61.
2 is rotatably supported. Its driving shaft 62
A hexagonal hole 63 is formed in the axial center part from the base end to the center part, and a circular hole 64 having a larger diameter than the hexagonal hole 63 is formed from the center part to the base end.

A dial shaft 65 fitted and fixed to the operation dial 14 is formed into a hexagonal rod shape that can be fitted into a hexagonal hole 63 of the driving shaft 62, and a lock spring 66 projecting in a chevron shape is supported at the tip thereof so as to be retractable. ing. Then, the dial shaft 65 is pressed and inserted into the hexagonal hole 63 against the repulsive force of the lock spring 66, and when the lock spring 66 reaches the circular hole 64, the lock spring 66 is inserted as shown in FIG.
protrudes from the dial shaft 65, and in this state, the operating dial 14 is held by the driving shaft 62, and the driving shaft 62 is rotated as the operating dial 14 is rotated. Further, the operation dial 14 can be detached from the driving shaft 62 because the dial shaft 65 can be pulled out from the driving shaft 62 by using a force exceeding a predetermined value against the repulsive force of the lock spring 66.

A drive sprocket 67 is fitted onto the driving shaft 62. The driving shaft 62 is located at the tip of both of them.
As shown in FIG. 11, locking grooves 68 having a substantially semicircular cross section are provided on the outer peripheral surface at symmetrical positions with respect to the center, and the drive sprocket 2 in the locking groove portions
7 is provided with a locking hole 69, and its locking groove 68
A round rod-shaped roller 70 is inserted into the lock hole 69. As shown in the figure, a spring ring 71 is fitted to the tip of the drive sprocket 67, and since the roller 70 is normally located within the lock hole 69 and the locking groove 68, the driving shaft 6
2 and a drive sprocket 67 are adapted to rotate together.

As shown in FIG. 10, an endless edge of the belt 50 is hooked to the base end of the drive sprocket 67, and the other endless edge is hooked to the transmission sprocket 23. Therefore, when the drive shaft 62 of the drive device 49 is rotated by the operation dial 14, the drive sprocket 67 is rotated, and based on the rotation, the transmission sprocket 23 is rotated via the belt 50, and the drive shaft 19 is rotated. It is designed to be rotated. Furthermore, when the drive shaft 62 is further rotated from the state where the drive sprocket 67 cannot rotate, the spring ring 7 is rotated as shown in FIG.
1 is enlarged in diameter by the rotational force of the drive shaft 62, and the roller 70 is disengaged from the locking groove 68, so that the drive shaft 62 rotates idly relative to the drive sprocket 67.

Next, the operation of the blind configured as described above will be explained.

Now, the first blind 3 is held in the predetermined position shown in FIG. 1 by the stopper 11, and the connecting device 2
When the operation dial 14 is rotated while the second connecting shaft 34 of the second connecting shaft 34 is fitted into the transmission sprocket 23 in the window frame 10, the drive sprocket 67 is rotated, and the transmission sprocket 23 is rotated through the belt 50. be rotated. Then, the drive shaft 19 is rotated via the first connecting shaft 29, connecting tube 33, and second connecting shaft 34 of the connecting device 22, and the slat 6 of the second blind 7 is rotated by the ladder cord 5. . At the same time, the second coupling shaft 3 of the coupling device 22
4 rotates the transmission ring 43 of the timing clutch 39, and based on the rotation, the link 18
As a result, the slat 2 of the first blind 3 is rotated. At this time, the slats 2 and 6 of both blinds 3 and 7 are rotated in the same phase.

Also, when pulling up the slat 6 of the second blind 7, the dial shaft 65 of the operation dial 14 is moved against the repulsive force of the lock spring 66 and the driving shaft 6 is pulled up.
When the output shaft of the motor is fitted into the hexagonal hole 63 of the driving shaft 62 and the motor is operated, the driving shaft 19 is rotated and the lifting cord 12 of the second blind 7 is moved to the winding cylinder 20. The slats are wound up one after another and pulled up by the bottom rail 13 starting from the lower slat 6.

During such lifting and lowering operations of the second blind 7, the second connecting shaft 34 of the connecting device 22 continues to rotate, but after the slat 2 of the first blind 3 is rotated to the vertical direction, as shown in FIG. Clutch spring 42 of timing clutch 39 as shown in FIG.
Since the abutting end 45 of the timing shaft 41 abuts against the stopper 47, the timing shaft 41
It becomes a state where it spins idly. Therefore, the timing clutch 3 is activated when the second blind 7 is raised or lowered.
9, the rotational force of the second connecting shaft 34 is transferred to the link 18.
will not be transmitted to.

When the second blind 7 is pulled up to the uppermost position, the winding cylinder 20 cannot wind up the lifting cord 12 any more, so the drive shaft 19 cannot rotate. If the motor is further operated in the same direction in this state, the diameter of the spring ring 71 will be expanded and the roller 70 will move toward the driving shaft 62, as shown in FIG.
The drive shaft 62 comes out of the locking groove 68 of the drive sprocket 67, and the drive shaft 62 becomes free to rotate relative to the drive sprocket 67. Therefore, even if the motor is further operated after the second blind 7 has been pulled up to the highest position, the rotational force of the motor will be transferred to the driving shaft 62 and the drive sprocket 67.
The belt 50, the connecting device 22, etc. will not be damaged.

Also, the rotational force of the transmission sprocket 23 is transferred to the drive shaft 1.
Since the coupling device 22 that transmits the transmission to the blind 9 is fitted to the transmission sprocket 23 with its second coupling shaft 34 biased by the coil spring 38, the second blind 7 can be raised and lowered using the motor. Sometimes, the second connecting shaft 34 is connected to the transmission sprocket 23.
It will never come off. Errors in the movement stroke of the coupling device 22 due to errors in the mounting position of the transmission sprocket 23 or the length of the second coupling shaft 34 can also be absorbed by the expansion and contraction of the coil spring 38.

Note that the drive device 49 in the embodiment described above can also be implemented with the following configuration.

That is, the drive device 81 shown in FIG. 14 transmits the rotational force of the operation dial to the transmission sprocket 23 through a transmission shaft rather than a belt as in the previous embodiment. To explain the configuration, a dial shaft 82 of a drive device 81 is rotatably supported by a case 81a, and a drive gear 83 is fitted and fixed to the dial shaft 82. Further, the tip of the dial shaft 82 protruding outside the case 81a is formed into a hexagonal bar shape, and an operation dial 84 is removably fitted therein. Dial shaft 82 inside case 81a
A driven gear 87, which fits into the driving gear 83, is rotatably fitted in the intermediate portion of a driven shaft 86, which is rotatably supported by a bearing 85 in an up-down direction perpendicular to the driving shaft 86. Both gears 83 and 87 are helical gears.

The driven gear 87 and the driven shaft 86 come into contact with each other at an inclined surface 88 whose diameter increases in a tapered manner at their upper ends.
7 is supported immovably in the axial direction between its slope 88 and bearing 85. A screw is threaded into the lower end of the driven shaft 86, and a nut 89 is screwed into the threaded portion. A coil spring 90 is disposed between the nut 89 and the bearing 85, and a biasing force using the bearing 85 as a fulcrum causes the driven shaft 86 and the driven gear 87 to move toward the slope 88.
The driven gear 87 and the driven shaft 86 are normally rotated together. Driven shaft 8
The upper end of 6 is formed into a hexagonal rod shape, and a transmission shaft 91 is fitted into that portion. And the transmission shaft 91
The upper end of the sprocket is connected to the transmission sprocket 23 of the above embodiment via a worm mechanism.

Now, in such a drive device 81, when the operation dial 84 is rotated, the transmission shaft 91 is rotated via the dial shaft 82, the drive gear 83, the driven gear 87, and the driven shaft 86, and the transmission shaft 91 is rotated. As in the previous embodiment, the drive shaft 19 is rotated to adjust the angles of the slats 2 and 6 of both blinds 3 and 7. When raising and lowering the slats 6 of the second blind 7 using the motor, the operation dial 84 is pulled out from the dial shaft 82, and the output shaft of the motor is fitted into the hexagonal shaft portion at the tip of the dial shaft 82. When the motor is operated, the slats 6 of the second blind 7 are moved in the same way as in the previous embodiment.
can be raised and lowered. If the motor is further operated after the bottom rail 13 of the blind 7 has been pulled up to the highest position and the drive shaft 19 is no longer rotatable, the driven shaft 86 and
An empty space is created between the slopes 88 of the driven gear 87.
Therefore, the extra rotational force caused by the motor is transferred to the driven shaft 86.
and the driven gear 87, the gears 83, 87 of the drive device 81 or the transmission shaft 91
The worm mechanism at the upper end will not be damaged.

In addition, the two types of drive devices 49 and 81 are both configured so that the operation dials 14 and 84 are removed and the output shaft of the motor is fitted into the hexagonal hole 63 of the driving shaft 62 or the tip of the dial shaft 82. 13
As shown in the figure, a hexagonal hole 93 may be provided on the front surface of the operation dial 92, and the output shaft of the motor may be fitted into the hexagonal hole 93.

Effects of the invention As detailed above, this invention allows the connecting shaft 34, which removably connects the drive shaft 19 and the slat operating means 23 of the window frame 10, to be attached toward the operating means 23 using the biasing means 38. As a result, even when the operating means 23 is driven using a motor, the connection shaft 34 can be prevented from coming off the operating means when driving the slat, and the slat can be reliably driven by the operating means 23. It has a great effect.

[Brief explanation of the drawing]

Figure 1 is a front view of a top and bottom split type blind related to this invention, Figure 2 is a front view of the first blind with it pulled down, and Figure 3 is a cross section showing the slat support structure of the first blind. Figure 4 is a cross-sectional view showing the drive shaft within the support frame, Figure 5 is a front view of the timing clutch, Figure 6 is a longitudinal sectional view of the timing clutch, and Figure 7 is the connection of the drive shaft end. 8 is a bottom view of the lower stile where the connecting device is installed, FIG. 9 is a vertical sectional view of the drive device, FIG. 10 is a sectional view showing the belt wrapping, and FIG. 11 is a sectional view showing the device. 12 is a sectional view showing the operation of the drive device, FIG. 13 is a front view showing another embodiment of the operation dial, and FIG. 14 is a partially cutaway front view showing another embodiment of the drive device. be. Window frame...10, drive shaft...19, transmission sprocket...23, second connecting shaft...34, coil spring...38.

Claims (1)

[Scope of utility model registration request] A blind is supported on a support frame movably supported with respect to the window frame, and the slat drive shaft of the blind is connected to one end of the drive shaft 19 in a manner that the slat drive shaft of the blind is removable from the slat operating means provided on the window frame. Attach the shaft 34 and connect the connecting shaft 34 to the window frame 10.
The connecting shaft 34 is connected to and detached from the slat operating means 23 by the urging means 38.
A slat drive device for a blind, characterized in that the slat drive device is biased toward the slat drive device.