JPH07122386B2 - Drive device for shutter, mainly roller shutter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotatably supported hollow winding shaft for winding and unwinding a shutter attached to a winding shaft, and a rotation direction switchable inside the winding shaft. A drive motor,
The present invention relates to a drive device for a side-guided shutter, mainly a roller shutter and the like. More specifically, in the present invention, the winding shaft is rotatable relative to the casing of the drive motor, and the motor shaft is attached to the winding pulley supported in the axial direction of the winding shaft for winding and unwinding the rope. It is non-slipably connected in both directions of rotation, and one end of the rope is attached to a winding pulley. It exits from the winding pulley and goes through a direction changing device to be opposite to the winding shaft. Side shutter end,
It is attached there. If the shutter and the cord are wound around the winding shaft or the winding pulley in opposite winding directions, and if the cord is wound around the winding pulley until the maximum rope winding diameter is reached, the shutter has the smallest shutter winding diameter. When the shutter is wound up to the winding shaft until it reaches the maximum shutter winding diameter, it is unwound from the winding pulley until the rope reaches the minimum winding diameter.

[0002]

2. Description of the Related Art In the most popular roller shutter,
A winding box for storing the winding shaft is provided at the upper end of the window or door. In this case, the roller shutter is extended by pulling down the already extended portion by using gravity. This feeding is performed manually or electrically while being braked by the controlled winding shaft. However, with such a roller shutter,
Since gravity is used, the roller shutter is not provided in the lower part, and it is also unsuitable when the roller shutter is installed in a window having a slope such as a roof window, an indoor garden, a greenhouse or the like.

On the other hand, a roller shutter drive device has been developed which is suitable for a roller shutter of a winding box located in the lower part which performs a closing motion for shielding a window or the like from the bottom to the top, and which can also have a sloped stroke. . This is possible because the end of the roller shutter opposite the winding shaft is pulled by the rope and the driven winding pulley. In the case of a known drive device of this type, the winding pulley and the cords thereof are driven when the roller shutter is extended. Then, the winding shaft rotates in conjunction with each other, and the spring device provided on the winding shaft is tensioned. The spring force is used for the subsequent winding of the roller shutter on the winding shaft, i.e. for moving the winding shaft in the winding direction.

[0004]

However, such a driving device cannot be installed or is expensive, for example, on the roller shutter of the winding box located at the upper part. Moreover, springs wear or break over time.

The present invention provides a stable roller shutter regardless of the mounting position of the roller shutter, whether it is the lower winding box, the upper winding box, or the gradient stroke roller shutter. It is an object of the present invention to provide a driving device for a shutter, which is mainly a roller shutter, which can be operated in both directions.

[0006]

A hollow winding shaft rotatably supported for winding and unwinding a shutter attached to a winding shaft, and a rotation direction switchable drive provided inside the winding shaft. An electric motor, the winding shaft of which is rotatable relative to the casing of the drive motor, and the winding shaft of which is supported at the axial end of the winding shaft for winding and unwinding the rope. Is connected so that it cannot slide and rotate in both rotation directions,
One end of the cord is attached to the winding pulley, and it exits from the winding pulley and is guided to the shutter end on the side opposite to the winding shaft via the direction changing device, and is attached thereto. The shutter reaches the minimum shutter winding diameter when the shutter and the rope are wound around the winding shaft or the winding pulley in opposite winding directions, and when the rope is wound around the winding pulley until the maximum winding diameter is reached. When the shutter is wound around the winding shaft up to the maximum shutter winding diameter, when the shutter is wound around the winding shaft, the rope is drawn out from the winding pulley until the rope reaches the minimum rope winding diameter, a side-guided shutter, A drive device mainly for a roller shutter, etc., which is an electric motor shaft inside a winding shaft or a motor shaft and a winding pulley. The drive shaft coupling a, and fitted friction clutch provided with the friction clutch components that are pressed against each other by the clutch spring, the friction clutch most part not slip rotation to the motor shaft to the drive shaft, also The friction clutch second part is rotatably arranged on the electric motor shaft or the drive shaft against the frictional force acting between the friction clutch parts, and between the friction clutch second part and the winding shaft, A one-way clutch having a one-way clutch first part non-slipably connected to a winding shaft and a one-way clutch second part non-slipably connected to a friction clutch second part is provided. When the friction clutch second part rotates in the same direction as the winding direction of the shutter, the one-way clutch second part is interlockingly engaged with the one-way clutch first part, and the shutter When the friction clutch second part rotates in the same direction as the protruding direction, the one-way clutch part can rotate separately, and the maximum cord winding diameter is smaller than or almost equal to the minimum shutter winding diameter. Drive device characterized by being the same.

The second component of the one-way clutch has a sleeve through which the electric motor shaft or the drive shaft is inserted, and the first component of the one-way clutch has a ring shape and is externally fitted to the sleeve. Further, there is a locking groove extending in the axial direction on the outer peripheral portion of the sleeve for engaging the locking latch protruding on the inner peripheral portion of the first part of the one-way clutch.

One end of the sleeve is fixed to the second friction clutch component, and the other end of the sleeve is engaged with a coil-shaped clutch spring fitted onto the motor shaft or the drive shaft. Further, the friction flange second part is formed by the radial flange integrally formed with the sleeve.

Further, the friction brake comes into contact with the winding shaft. Then, the friction brake contacts the inside of the winding shaft. Further, the friction brake is formed by a flexible deformable flat member, has a curved or bent shape, and is interposed in a gap between the winding shaft and the electric motor casing.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. A roller shutter is schematically shown in FIG.
The roller shutter 1 can be wound around the winding shaft 2 and can be paid out from the winding shaft 2. The roller shutter 1 mainly consists of plastic strips 3 which extend horizontally adjacent to each other in the longitudinal direction. The winding shaft 2 is located inside the winding box 4, and the winding box 4 is provided at the lower end of the surface to be shielded such as a window. Although the roller shutter 1 driven by a vertical surface is shown in the example of the drawings, the roller shutter 1 can be installed even when a window having a slope or the winding box 4 is provided on the upper portion.

A hollow narrow path 5 extends upwardly from the winding box 4 at each side of the roller shutter 1, and the hollow narrow path 5 guides the roller shutter at the side when winding and unwinding. The hollow narrow passages 5 on both sides communicate with each other through another hollow narrow passage 6 extending laterally at the upper portion.

The present invention can also be applied to a roller gate, a roller grid, or other shutters that can be installed in windows, doors, gates, etc., instead of the roller shutter 1. Therefore, hereinafter, the general term “shutter” will be used instead of “roller shutter”.

The drive device for the shutter 1 has the winding shaft 2 formed in a hollow shape as described above.
Is stored inside the winding box 4 and is rotatably supported. The winding shaft 2 is used for winding and unwinding the shutter 1 whose one end 7 is fixed to the winding shaft 2. The wound part of the shutter 1 forms a shutter wound part 8, and the unwound part extends to the front of the window or the like. In FIG. 3, the entire shutter 1 is shown by a chain double-dashed line, while in FIG. 2, only the extended shutter area visible from the top is drawn by a two-dot chain. On the other hand, the shutter winding part 8
Each winding state 9 of is drawn by a solid line in FIG.

Inside the winding shaft 2, a drive motor 10 whose rotation direction can be switched is located. The drive motor 10 is fitted into the winding shaft 2 from the end of the winding shaft 2. The electric motor casing 11 has a support ring 12 rotatably fitted to the electric motor housing 11 in the vicinity of the end of the winding shaft 2. The winding shaft 2 is fitted onto the support ring 12 so that the winding shaft 2 is rotatable relative to the motor casing 11. Drive motor 1
0 is somewhat projected from the winding shaft 2 and fixed to the end surface 13 of the winding box 4 or the like. If the drive motor 10 can be fixed by means of suitable intervening parts, it is not necessary for the drive motor 10 to project from the winding shaft 2. Therefore, attachment of the drive motor 10 to the end face 13 or the like is not important.

A drive motor 1 located inside the winding shaft 2.
From the end of 0, the electric motor shaft 14 shown by the broken line projects from the electric motor casing 11, and the electric motor shaft 14 can be driven in both rotation directions as described above. Ancillary electrical equipment, including electrical switches, is not shown. The motor shaft 14 extends to the other end of the winding shaft 2. Further, in the present embodiment, the drive shaft 16 is connected to the electric motor shaft 14 via the intervening component 15 so as not to slide and rotate, and another drive shaft component 18 slides to the drive shaft 16 via another intervening component. It is connected so that it cannot rotate. The drive shaft 16 and the other drive shaft component 18 may be integrated. The drive shaft component 18 projects beyond the end of the adjacent winding shaft and fits into the bearing hole of the bearing cover 20 that seals the winding shaft 2, whereby the winding shaft 2 is rotatably supported. The electric motor shaft 14 is connected, via a drive shaft 16 and another drive shaft component 18, to a winding pulley 21 which is supported in the axial direction of the winding shaft 2 in a non-slidable manner. The winding pulley 21 has two side flanges 2
2 and 23, the side flanges 22 and 23 of which are located at a relatively narrow distance from each other in the axial direction, and are connected to each other through a pulley core 30 inside the radial direction. The flanges 22 and 23 and the pulley core 30 define a winding space in which the rope 24 can be wound or unwound. Journal 26 protruding from the end face 25 of the facing winding box 4
A winding pulley 21 is rotatably supported by the. Further, the winding pulley 21 is non-slipably connected to the drive shaft component 18 in both rotation directions, for example, by providing a coupling sleeve 27 protruding from the winding pulley 21 and fitted onto the drive shaft component 18.

One end 29 of the rope 24 is the winding pulley 2
It is stuck to 1. In FIG. 3, the cord 24 is a portion wound around the winding pulley 21 (cord winding portion 3).
1 and the winding state 32) of the cord, and a portion extending from the winding pulley 21. In FIG. 1, the rope 24 emerges from the winding pulley 21 and turns into the direction change pulleys 33, 34, 3
5 via a diverting device 5 to the end of the shutter 1 opposite the winding shaft 2 and there, for example, at position 36
Is stuck to. In this way, by pulling the cord 24, the shutter 1 is drawn out from the winding shaft 2 and is in a shielded state.

In FIG. 3, the shutter 1 (shown by a chain double-dashed line) and the rope 24 (shown by a chain line) are respectively wound around the winding shaft 2 to the winding pulley 21 in opposite winding directions. Show. When the cord 24 is wound around the winding pulley 21, that is, when the end of the shutter 1 on the side opposite to the winding shaft 2 is pulled by the cord, the diameter of the cord winding portion 31 increases, while the shutter winding portion 8 Has a smaller diameter. When the shutter 1 is paid out until the window or the like is shielded, the diameter of the cord winding portion 31 becomes maximum and the diameter of the shutter winding portion 8 becomes minimum. On the contrary, when the shutter 1 is wound around the winding shaft 2 and the diameter of the shutter winding portion 8 reaches the maximum diameter, on the other hand, the cord winding portion 31
The diameter of is the minimum filament winding diameter.

When the shutter 1 is wound around the winding shaft 2, both the winding shaft 2 and the winding pulley 21 are driven by the drive motor 10. Since the shutter winding portion 8 and the cord winding portion 31 have different diameters, the winding shaft 2 and the winding pulley 21 cannot rotate at the same speed. For this reason, a friction clutch is provided between the drive shaft 16 and the winding shaft 2.

In FIG. 2 , the friction clutch 37 has two friction clutch parts 38, 39 with an intervening friction disc 40 of friction material, both friction clutch parts 38, 39 maintaining a friction connection. Are pressed against each other by a clutch spring 41. In the present embodiment, the friction clutch first part 38 axially supported by the intervening part 15 on the drive motor 10 side is the hexagonal outer circumference of the drive shaft 16 and the friction clutch first part 38 fitted externally. By having a corresponding hexagonal inner circumference, it is fitted onto the drive shaft 16 in a non-slip-rotatable manner. On the other hand, like the first friction clutch component 38, the second friction clutch component 39 having a ring disk shape is loosely fitted onto the drive shaft 16. The same applies to the friction disc 40. However, since the second friction clutch component 39 is pressed against the first friction clutch component 38 together with the friction disc 40 by the clutch spring 41, it cannot rotate freely. Therefore, the second friction clutch component 39 is rotatable relative to the drive shaft 16 against the frictional force acting between the friction clutch components 38, 39 via the friction disc 40.
Further, the second friction clutch component 39 has a one-way clutch 42, which will be described later, when the shutter 1 is wound around the winding shaft 2.
It is connected to the winding shaft 2 via the so as not to be able to rotate.

When the shutter 1 is wound around the winding shaft 2, the winding shaft 2 is driven via the friction clutch 37, while the winding pulley 21 is directly driven. In that case, the winding shaft 2 and the winding pulley 21 are
(See FIG. 3). Then, since the diameter of the shutter winding portion 8 becomes larger than the diameter of the rope winding 29, the rotation of the winding shaft 2 around the shutter 1 is faster than the rotation of the rope 24. Therefore, the friction clutch 37 prevents the cord 24 from being cut. However, the friction clutch 37 may cause a slip between the friction clutch parts 38 and 39, and the friction clutch second part 39 and the winding shaft 2 may rotate more slowly than the winding pulley 21. Therefore, the tension of the cord 24 and the diameter between the two winding portions 8, 31 are always adjusted by the friction clutch 37.

When the shutter 1 is unwound from the winding shaft 2, the winding pulley 21 is driven in the direction opposite to the direction of the arrow 43, and the cord 24 is wound around the cord winding pulley 21. In that case, the end of the shutter 1 opposite to the winding shaft 2 is pulled. Since the winding shaft 2 is not driven during this stroke, it does not matter if the winding portions 8 and 31 are different. The one-way clutch 42 is provided so that the drive shaft 16 drives the winding shaft 2 in the direction of arrow 43. The one-way clutch 42 is located between the friction clutch second part 39 and the winding shaft 2. The one-way clutch 42 includes a one-way clutch first part 44 that is non-slipably connected to the winding shaft 2 and a one-way clutch second part 45 that is non-slipably connected to the friction clutch second part 39. Have. When the second friction clutch component 39 rotates in the same direction as the winding direction of the shutter 1 (arrow 43
Direction), the one-way clutch second part 45 is interlockingly engaged with the one-way clutch first part 44, so that the winding shaft 2 that is non-slipably connected to the one-way clutch first part 44 is also connected. Rotate. On the other hand, friction clutch second part 3
When the shutter 9 is rotated in the reverse direction, that is, when the shutter 1 is rotated in the same direction as the feeding direction, the two-way clutch component 4
4, 45 rotate separately.

The maximum diameter of the cord winding portion 31 in a state where the closed window or the like is shielded is smaller than or substantially the same as the minimum diameter of the shutter winding portion 8. If the diameter of the cord winding portion 31 is larger, when the shutter 1 is wound around the winding shaft 2, the cord 24 is unwound from the winding pulley 21 at a faster speed than when the shutter 1 is wound around the winding shaft 2. Become. In that case, the upper end of the shutter 1 on the side opposite to the winding shaft 2 cannot maintain its height.

In this embodiment, the one-way clutch second part 45
Is formed by a sleeve 47 which is fitted through the motor shaft 14 and the drive shaft 16 which is connected to the motor shaft. Further, the one-way clutch first part 44 has a ring shape and is fitted onto the sleeve 47. The one-way clutch 42 is a freewheel device in which the outer circumference of the sleeve 47 to the one-way clutch second part 45 and the inner circumference of the one-way clutch first part 44 cooperate with each other.

There is a locking groove 48 extending in the axial direction on the outer circumference of the sleeve 47 (the locking groove shown by the broken line in FIG.
More clearly in), its locking groove 48 has
A locking latch 49 protruding from the inner circumference of the one-way clutch first part 44 is engaged. In the present embodiment, the locking latches 49 are formed in a substantially rectangular parallelepiped shape and are swingably supported in the recesses of the one-way clutch first part 44, respectively, and are provided on the side opposite to the end of the swing support portion. The end portion is elastically biased by a locking spring 50. That is, the locking latch 49 is the spring 50.
Is projected toward the one-way clutch second part 45 by the force. One-way clutch second part 45 in the direction of arrow 43
At the time of rotation (when the shutter 1 is wound), at least one locking latch 49 fits into one of the locking grooves 48,
Thereby, the one-way clutch first part 44 is interlockedly rotated. When the one-way clutch second part 45 is rotated in the opposite direction, the locking groove 48 of the one-way clutch second part 45 is not fitted and the outer periphery slides, so that interlocked rotation does not occur.

Further, as shown in FIG. 2, one end of the sleeve 47 is fixed to the second friction clutch component 39, and the coil-shaped clutch spring 41 and the sleeve 47 are externally fitted to the electric motor shaft 14 to the drive shaft 16. Seat 51 is inserted between the two. The other end of the clutch spring 41 is fixedly supported, and is supported by the end face of another intervening component 17 in this embodiment.

The sleeve 47 is the one-way clutch first part 4
Since it is slightly longer than 4 in the axial direction, the sleeve 47 can be axially displaced for adjusting the friction clutch.
The friction clutch second part 39 is formed by a radial flange integrally formed with the sleeve 47.

When the shutter 1 is extended from the winding shaft 2, the winding shaft 2 should be stationary as much as possible.
However, for the one-way clutch, the one-way clutch second part 4
There is a possibility that frictional force will be generated in the locking latch 49 that slides around the outer periphery of 5, and that frictional force may easily rotate the winding shaft 2. In order to avoid this, a friction brake 52 acting on the winding shaft 2 is provided. Various methods are possible for forming the friction brake. For example, since the friction brake 52 acts on the inside of the winding shaft 2, it may be provided inside the winding shaft 2. An example of a particularly simple friction brake is shown in FIGS. Friction brake 52
Since the flat member 53 is curved or bent, it can be flexibly deformed. The flat member 53 is the winding shaft 2
Is interposed in the gap 54 between the fixed electric motor casing 11 and the electric motor casing 11 and is in contact with both parts. Thereby the flat member 5
3 applies a frictional force to the winding shaft 2 that resists unfavorable rotation of the winding shaft 2. When the shutter 1 is extended from the winding shaft 2 by the cord 24, the frictional force must be suppressed.

This type of friction brake is required to be installed mainly when the roller shutter and the like are located on the upper side.
In that case, the shutter 1 is extended downward by gravity by using the friction brake acting on the winding shaft 2.

[0029]

As described above, the winding diameter of the shutter around the winding shaft and the winding diameter of the cord around the winding pulley reversely change regardless of whether the shutter is wound or unwound. Therefore, it is impossible to rotate the winding shaft and the winding pulley at the same rotation speed. However, as mentioned above, when winding the shutter, the winding shaft and winding pulley are
It is driven by a shared drive motor. Moreover, because of the different diameters of the winding shaft and the winding pulley, the device according to the invention is equipped with a friction clutch.
That is, since the one-way clutch is located between the friction clutch and the winding shaft, the friction clutch works only when the shutter is wound. Since the cord extending from the winding pulley is connected to the other end of the shutter, the winding shaft winds the shutter through the friction clutch during winding. Since the friction clutch acts when the winding diameter of the shutter is larger than the winding diameter of the rope, the friction clutch second part and the winding shaft accompanying it rotate at a slower speed than the friction clutch first part driven by the drive motor. To do.

In this relationship, it can be seen that the maximum cord wrap diameter is less than or about the same as the minimum shutter wrap diameter. Therefore, at any time when the shutter is wound, the speed at which the shutter is wound is not slower than the speed at which the cord is fed out from the winding pulley.

This ensures that the drive according to the invention operates in both directions. Further, this device has a relatively simple structure, and since one driving motor is sufficient for the bidirectional movement, the production cost is relatively low. Also, because all individual parts except the winding pulley are stored inside the winding shaft,
It is also a compact device.

[Brief description of drawings]

FIG. 1 is a schematic view of a roller shutter provided on a window, in which a side guide of the roller shutter and a winding box are shown in a cut state.

FIG. 2 shows a vertical sectional view of a driving device of the present invention.

3 shows the end face of the device of FIG. 2 as seen from arrow III,
The hoisting box has been omitted, and the rope is indicated by a dashed line.
The shutter is indicated by a chain double-dashed line.

4 shows a cross-sectional view of the one-way clutch of the drive device of FIG. 2 taken along section line IV-IV parallel to the end face of FIG.

5 shows a partial cross-sectional view of the drive device of FIG. 2 taken along section line VV.

[Explanation of symbols]

 10 Drive Electric Motor 14 Electric Motor Shaft 16 Drive Shaft 21 Winding Pulley 37 Friction Clutch 42 One-Way Clutch

Claims (8)

[Claims] 1. A rotatably supported hollow winding shaft (2) for winding and unwinding a shutter (1) attached to a winding shaft (2), and provided inside the winding shaft (2). Drive motor (1
0) and the winding shaft (2) has a drive motor (10)
To the winding pulley (21), which is rotatable relative to the casing (11) of the winding and is supported on the axial end of the winding shaft (2) for winding and unwinding the rope (24). The shaft (14) is connected in both rotational directions so as not to be able to rotate, and one end of the rope (24) is attached to the winding pulley (21) so that the shaft (14) exits from the winding pulley (21). The shutter (1) and the cord (24) are guided to and attached to the shutter end opposite to the winding shaft (2) via the conversion device, and are wound in opposite winding directions. It is wound around the shaft (2) to the winding pulley (21), and the rope (2) is wound on the winding pulley (21) until the maximum rope winding diameter is reached.
4) when the shutter is wound around the winding shaft (2) until it reaches the minimum shutter winding diameter, and when the shutter is wound around the winding shaft (2) until the maximum shutter winding diameter is reached. A drive device for a side-guided shutter, mainly a roller shutter, which is fed from a winding pulley (21) until the thread (24) reaches the minimum thread winding diameter, the winding shaft (2) A friction clutch component (38, 39) pressed against each other by a clutch spring (41) is attached to an internal motor shaft (14) or a drive shaft (16, 18) connecting the motor shaft (14) and a winding pulley (21). ) Is fitted on the outer side, and the friction clutch first part (38) is the motor shaft (14) to the drive shaft (1).
6 and 18) so that the friction clutch second part (39) resists the frictional force acting between the friction clutch parts (38, 39), and the motor shaft (14) through the drive shaft (16). , 18) are respectively rotatably disposed, and a pair of friction clutch second part (39) and the winding shaft (2) are connected to the winding shaft (2) so as not to rotate and slide. One-way clutch (42) comprising one-way clutch first part (44) and one-way clutch second part (45) non-slipably connected to friction clutch second part (39)
When the friction clutch second part (39) is rotated in the same direction as the winding direction of the shutter (1), the one-way clutch second part (45) is the one-way clutch first part (44). ), And when the friction clutch second part (39) rotates in the same direction as the shutter (1) feeding direction, the one-way clutch parts (44, 45) can rotate separately. And the maximum cord winding diameter is smaller than or substantially the same as the minimum shutter winding diameter. 2. The one-way clutch second part (45) has a sleeve (47) through which the motor shaft (14) to the drive shaft (16, 18) are fitted, and the one-way clutch first part (44). 2. The drive device according to claim 1, characterized in that it has a ring shape and is fitted onto the sleeve (47). 3. A one-way clutch first part (44) having an axially extending engagement with the outer periphery of the sleeve (47) for engagement of a locking latch (49) protruding at the inner periphery. Stop groove (4
The drive device according to claim 2, further comprising 8). 4. One end of the sleeve (47) is fixed to the second friction clutch component ( 39 ), and the other end of the sleeve (47) is connected to the motor shaft (14) to the drive shaft (16, 1).
The drive device according to claim 2 or 3, characterized in that a coil-shaped clutch spring (41) externally fitted on the drive member (8) is engaged. 5. The drive device according to claim 2, wherein the friction clutch second part (39) is formed by a radial flange integrally formed with the sleeve (47). 6. A friction brake (52) for the winding shaft (2).
The drive device according to claim 1, wherein the drive device is in contact with the drive device. 7. A shaft (2) around which a friction brake (52) is wound.
The drive device according to claim 6, wherein the drive device contacts the inside of the. 8. The friction brake (52) is formed by a flexible deformable flat member (53) and has a curved or bent shape, and the winding shaft (2) and the motor casing (11).
8. The intervening material is provided in a gap between the and.
The drive device described.