JPH0151633B2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention This invention is applicable to curtains, blinds,
The present invention relates to a screen winding device for winding up and storing various screens such as lightweight shutters, tents, and projection screens, or for unfolding and storing the screens, and more particularly relates to a screen positioning mechanism for setting the unfolding stop position of the screen.

(B) Background of the Invention In general, this type of screen winding device drives a winding shaft that winds up the screen by a motor via a speed reduction mechanism, and the winding or unfolded screen is driven by a motor via a speed reduction mechanism. In order to stop the screen at its predetermined stop position, each stop switch corresponding to the amount of winding and unfolding of the screen is turned on, and the rotation of the motor is stopped and the screen is positioned at the winding and unfolding positions. are doing.

By the way, the stop switch used in such a positioning means usually detects when the winding shaft corresponding to the amount of vertical movement of the screen reaches a predetermined number of revolutions and turns on to automatically stop the screen. The stop operation is being performed (for example, the
-47116).

However, as a means of controlling the operation of such a stop switch, the stop switch is operated using a so-called feed screw mechanism, which is the axial feeding operation of a pinion that reciprocates along a long threaded rod. As the positioning setting range of the stop position becomes larger, a longer threaded rod is required, so the screen positioning control mechanism has been forced to be longer due to this feed screw mechanism. In particular, it was unsuitable and could not be used for screens with a short winding width.

(c) Purpose of the Invention Therefore, the present invention provides a screen positioning mechanism for a screen winding device that does not make the screen positioning control mechanism elongated and can easily adjust and finely adjust the screen stop position. For the purpose of providing.

(D) Summary of the Invention This invention comprises a plurality of consecutively arranged planetary gear mechanisms linked to forward and reverse outputs of a winding shaft, and between the output side of the winding shaft and the input side of the planetary gear mechanism. A worm gear capable of engaging and disengaging a worm wheel interlocked with the planetary gear mechanism and rotatable from the outside, and a switch that drives the motor when the worm gear is disengaged. When the worm gear is engaged, the forward and reverse outputs of the winding shaft are transmitted to the planetary gear mechanism, and when the worm gear is disengaged, the transmission to the planetary gear mechanism is cut off and the switch is operated. The internal gears are provided with different rotation ratios, and an engagement groove is carved in the axial direction at one place on the outer peripheral surface of each of these internal gears. The present invention is characterized in that it is a screen positioning mechanism for a screen winding device, which is provided with a position detection switch for detection and controls the stop of a motor using the position detection switch.

(e) Effects of the Invention According to the present invention, since only the rotation mechanism in the circumferential direction is controlled by the planetary gear mechanism, it can be constructed compactly without requiring a long installation space in the axial direction. Therefore, the entire device can be made compact, and the screen can be mounted efficiently without being limited in its mounting width, which is particularly effective for small screens with short winding widths.

Furthermore, by combining an internal gear with a large amount of rotation and detecting the engagement groove of that gear, the detection error of the screen stop position can be minimized. By detecting this, it is possible to identify one stopping position within the movement range from the screen winding position to the unfolding position, and by simultaneously detecting the engagement grooves of multiple internal gears with different rotation amounts, one stopping position can be identified. The accuracy of the stop position is improved.

In addition, when the worm gear is disengaged, by operating a switch to drive the motor, the screen can be easily moved to the desired position.If the worm gear is engaged again at that position, the desired screen can be moved. Can be set to stop position.

Furthermore, in this case, since the engagement grooves are operated in a state in which they are aligned in a straight line with the mesh release operation, the alignment of the engagement grooves is not disturbed and the operation is easy.

Further, even if the screen is to be set again after the screen stop position has been set, it can be easily set again by appropriately engaging and disengaging the worm gear, and the work of positioning the screen stop position is extremely simple.

Further, even if the worm gear is rotated from the outside, the planetary gear mechanism can be driven, so that the screen stop position can be easily finely adjusted by adjusting the setting position from the outside.

(F) Embodiment of the Invention An embodiment of the invention will be described in detail below based on the drawings.

The drawing shows, as an example of a screen winding device, a winding device for a roll blind that provides sun protection and light protection, and in FIG. 2, its drive section 3, and deceleration mechanism section 4
, a first self-locking section 5, a second self-locking section 6, a manual winding section 7, and a blind positioning mechanism section 8.

The above-mentioned winding shaft 2 is formed into a cylindrical body, and a drive mechanism for driving and controlling the winding shaft 2 is installed inside the hollow interior, and the shaft 2 is attached to a wall surface at both ends. They are provided with mounting members 9 and 10, respectively.

Then, the mounting member 9 on one side (the left end side in the figure)
is an end plate 11 fitted into the open end of the winding shaft 2;
In order to cut off conduction from the winding shaft 2, the bearing 1 is
A mounting pin 13 is mounted through the winding shaft 2, and the outer end of the mounting pin 13 projects from the end surface of the winding shaft 2. It is fixedly held and attached to the outside). Note that the inner end of this mounting pin 13 is
The position is regulated by a receiving member 16 via a steel ball 15.

On the other hand, the mounting member 10 on the other side (right end side in the figure)
One side of a connecting ring 18 supported via a bearing 17 is fitted into the open end of the winding shaft 2 to block conduction from the winding shaft 2, and a connecting ring 18 with a square cross section is fitted on the other side. A fixed case 19 is fitted and fixed to the outside, and a rectangular fixing protrusion 20 protruding from the center of the outer end surface of the fixed case 19 is fixedly supported and attached to a fixing member (not shown) on a wall surface.

On the other hand, the outer end of a support shaft 21 formed in an elongated cylinder is fitted and fixed in the center of the inner end surface of this fixed case 19, and is prevented from coming out with a fixing pin 20a, and the inner end thereof is a winding shaft. The winding shaft 2 is inserted concentrically into the winding shaft 2 and is pivotally supported by a bearing 23 on the inner circumferential surface of the winding shaft 2 via a support ring 22 . Each drive mechanism for the winding shaft 2, which will be described later, is mounted on the fixed support shaft 21.

The aforementioned drive unit 3 is constituted by, for example, an outer rotor type forward/reverse motor 24, and this forward/reverse motor 24 moves the outer periphery of a stator 25 fixed on the shaft at the inner end of the support shaft 21 to an outer rotor 26. Both ends of the rotor 26 are pivotally supported on the support shaft 21 via bearings 27, 27 so that the rotor 26 can rotate. Further, a capacitor C of this motor is screwed to the inner end side of the support shaft 21. A lead wire 28 for motor wiring is connected to the hollow interior of the support shaft 21 and inserted from the outer end of the shaft 21 to the motor position and the capacitor position, and the forward/reverse motor 24 is turned on. , OFF controlled. As a result, the outer rotor 26 is rotated and stopped, and the output of the outer rotor 26 is transmitted to a deceleration mechanism section, which will be described later, to rotate the winding shaft 2.

The above-described reduction mechanism section 4 includes first to fourth stage planetary gear reduction mechanisms 29, 30, which are small and provide high output.
31 and 32 are arranged consecutively on the support shaft 21, and the first stage 29 includes a first sun gear 33 that is integrally connected to the outer end side of the outer rotor 26 and rotates, and A first planetary gear 34 that meshes with each other, a first internal gear 37 that meshes with each of the first to third stage planetary gears 34, 35, 36, and a first planetary gear 34... and a first carrier 38 that transmits the revolution output of the first stage 30 to the second stage 30.

A shaft serving as a second sun gear is protruded from the outer end of the first carrier 38, and the power is transmitted to the second stage 30 via the first carrier 38 which also serves as the second sun gear. In this way, the second to fourth stage planetary gear reduction mechanisms 30, 31, 32 have the same gear configuration, and the motor output is transmitted to the fourth stage 32. is decelerated to a predetermined rotational force, and rotates the winding shaft 2 at a constant speed. In this case, the fourth stage 32 has a hexagonal peripheral surface at the shaft end of a fourth carrier 39, and is fitted and fixed to a fifth carrier of a second self-locking portion, which will be described later, to prevent rotation. Therefore, the fourth planetary gear 40
is in a state where only rotation is allowed, and the second internal gear 41 corresponding to this fourth stage 32 is rotated, and based on the rotation of this gear 41, the gear 41 is rotated.
The winding shaft 2, which is integral with the winding shaft 2, is rotated. Note that the first internal gear 31 described above is integrally fitted to the inner circumferential surface of the winding shaft 2.

The first self-locking section 5 described above is provided as a locking means for locking the blind in the rolled-up position and in the unfolded and used position, and is automatically locked in response to a load from the load side. It has a self-locking function, for example, as shown in Figures 2 and 3.
A protrusion 42 is provided protrudingly on the outer peripheral surface of the second internal gear 41, and a recess 44 into which the protrusion 42 is fitted is formed in a fixed ring 43 that holds the gear 41, and the protrusion 42 is regulated by the recess 44. The second internal gear 41 is allowed to rotate within a very small range, and the self-locking function is automatically performed by the reaction force of the second internal gear 41 corresponding to the load of the blind.

The second internal gear 41 and the fourth carrier 39 are located opposite each other on the side, and a ratchet gear 45 is carved on the outer peripheral surface of the fourth carrier 39. A pair of ratchet pawls 46 and 47 are engaged from the reverse direction.

Shafts 48, 48 are integrally formed at the base ends of the ratchet pawls 46, 47, and these shafts 4
8 and 48 are supported by a fixed ring 43, and both ratchet pawls 46 and 47 are biased in the meshing direction by a leaf spring 49 supported by this fixed ring 43.

The width of the meshing portion of the ratchet pawls 46 and 47 is set so as to exceed the width of the ratchet gear 45 and enter into the notch 50 of the second internal gear 41, and furthermore, the width of the engaging portion of the ratchet pawls 46, 47 is set so as to fit into the notch 50 of the second internal gear 41. The gear 41 has release cam surfaces 51 and 52.
These release cam surfaces 51 and 52 are regulated by the protrusion 42 and recess 44 of the second internal gear 41 from engaging and releasing the ratchet pawls 46 and 47 in response to the forward and reverse outputs of the motor 24. Operate within the minute rotation range.

In addition, with respect to the forward and reverse directions of the motor 24, the second
The internal gear 41 is the fourth planetary gear 40
Rotate in the opposite direction through.

FIG. 2 shows a lock-off state in which rotation of the winding shaft 2 is allowed; this means that the forward/reverse motor 24 rotates in the forward and clockwise direction, thereby causing the second internal gear 41 to rotate in the counterclockwise direction. The winding shaft 2, which is integrated with the winding shaft 2, rotates counterclockwise to unfold the blind to a predetermined position. At this time, the release cam surface 52 resists the leaf spring 49 and engages the ratchet pawl 47.
The second internal gear 41 is allowed to rotate counterclockwise in order to push up the lower surface of the ratchet pawl 47 and disengage the ratchet gear 45. At this time, the ratchet pawl 46 on the other side is connected to the ratchet gear 45 of the fixed fourth carrier 39.
Since it orbits above, there is no problem with rotation.

FIG. 3 shows the state of the lock-on that restricts the rotation of the winding shaft 2. This locks on to stop the blind at a predetermined position when the blind is wound or unfolded at a predetermined position. When the rotation of the motor 24 is stopped, the rotation of the winding shaft 2 is stopped. At this time, a counterclockwise rotational force acts on the winding shaft 2 due to the weight of the blind, and this action causes the recess 44 of the fixed ring 43 to rotate within a minute range where it is locked by the protrusion 42. With this rotation, the release cam surface 52 is separated from the lower surface of the ratchet pawl 47, and this ratchet pawl 47 is released from the leaf spring 4.
9, the winding shaft 2 engages with the ratchet gear 45 and naturally locks the counterclockwise rotation of the winding shaft 2.

As a result, the blind is automatically self-locked at each stop position of the winding position and the unfolding position based on the rotation stop operation of the motor.

In the case of a reverse rotation of the motor, the rotation of the second internal gear 41 causes the release cam surface 51 to release the meshing of the ratchet pawl 46, so that the second internal gear 41 is allowed to rotate in reverse. As a result, at the initial stage of driving the motor 24, the ratchet pawls 46 and 47 corresponding to forward and reverse rotation of the motor output are disengaged, the first self-locking section 5 is in the released state, and the winding shaft 27 is in a position to wind up the blind. Rotated.

In addition, 53, 53 are the stoppers of the ratchet claws,
Reference numeral 54 is a cover for the ratchet pawl portion, and is attached to the fixed ring 43.

The first self-locking section 5 configured in this way
transmits the output from the motor 24 side to the winding shaft 2 and locks the output from the winding shaft 2 side.

The second self-locking section 6 described above transmits the output from a manual winding pulley (described later) to the winding shaft 2 and locks the output from the winding shaft 2 side. During operation, the fifth carrier 55 fixes the fourth carrier 39 described above.
The rotation of the winding shaft 2 is locked to allow rotation of the winding shaft 2, and conduction to the manual winding pulley side is cut off.On the other hand, during manual winding operation, the lock is released and the fifth carrier 55 is Rotation is allowed, and the winding shaft 2 is rotated based on this rotation.

This locking mechanism is connected to the outside of the first self-locking part 5 with a bearing 56 in between, and has the same mechanism as the first self-locking part 5, and the fifth planetary gear 57 corresponds to the fourth planetary gear 40 described above. The second internal gear 41 corresponds to the third internal gear 58, the fourth carrier 39 corresponds to the fifth carrier 55, and the fixed ring 43 corresponds to the inner end of the connecting ring 18. Since it has a locking effect, its explanation will be omitted.

The above-mentioned manual winding unit 7 has, for example, a manual winding pulley 59 rotatably disposed on the outer end of the support shaft 21 and is rotated from the outside. A rope 60 for rotating the pulley 59 is hung on the surface, and is suspended below the lower surface of the mounting member 10. Further, a support shaft 2 is provided at the center of the inner end of the pulley 59.
1, a long hollow shaft for transmission is protruded, and a fifth sun gear for manual use is provided on the circumferential surface of the inner end of the hollow shaft.
It meshes with the planetary gear 57.

In the manual winding section 7 configured in this way, the output during manual operation via the pulley 59 releases the lock of the second self-locking section 6, thereby rotating the fourth carrier 39 which is integrated with the fifth carrier 55. Based on this, the entire deceleration mechanism section 4 is rotated, and the winding shaft 2 is rotated accordingly. Note that even if the winding shaft 2 is rotated based on the output from the motor side located on the opposite side, since both carriers 39 and 55 are fixed by the second self-locking part 6, the motor output is It is not conducted to the manual winding section 7 side.

The aforementioned blind positioning mechanism section 8 determines the winding setting position when the blind is rolled up and stored;
This is to position each setting position with respect to the unfolded setting position when used after being rewound and unfolded. and,
It is constituted by a combination of a planetary gear mechanism 62 for deployment positioning and limit switches 63 and 64 corresponding thereto.

The above-mentioned planetary gear mechanism 61 for winding positioning
As shown in FIGS. 4 to 6, the fourth internal gear 65 for output, which is integrally fitted into the outer end opening of the winding shaft 2, has a pinion equipped with gears of different diameters. A large diameter gear 66 is meshed with the small diameter gear, and sixth and seventh sun gears 67 and 68 are meshed on both sides of the small diameter gear, with the sixth sun gear 67 side being the winding side and the seventh sun gear 68 side being the deployment side. Provided for positioning.

The above-mentioned sixth sun gear 67 has a small diameter shaft 69 protruding from the center of its outer end surface, and a sun gear is formed on the outer peripheral surface of the small diameter shaft 69. Also, on this small diameter shaft 69, a sixth carrier 7 holding the shaft of a sixth planetary gear 70 meshing with the sun gear.
1 is loosely fitted, and the rotation of this sixth carrier 71 is restricted by a clutch mechanism which will be described later. A fifth internal gear 72 corresponds to the sixth planetary gear 70, and this gear 72 has a small-diameter gear shaft with a sun gear formed protruding from the center of its outer end surface, and a seventh planetary gear is mounted on this gear shaft. 73...
. . . are equally spaced, and an eighth planetary gear 74 . The above-mentioned seventh planetary gear 7
3 corresponds to the sixth internal gear 76, and the eighth
The planetary gear 74 includes a seventh internal gear 7.
7 correspond to each other independently.

These fifth to seventh internal gears 7
2, 76, and 77, a take-up side limit switch 63 is installed, and these gears have outer peripheral surfaces of the same diameter, and are formed with different rotation ratios. Engagement grooves 78 are carved in the axial direction at one location, respectively.
The engagement grooves 7 of these gears 72, 76, 77
8...When the line is aligned, the actuator 79 of the limit switch 63 engages and turns OFF.
The motor 24 is activated and the rotation of the motor 24 is stopped to fix the winding position. The winding-side limit switch 63 mentioned above is set to the ON state when it is not operated, and is set to the OFF state when the winding position is reached.

Next, when the winding position of the blind is to be finely adjusted, the clutch mechanism 80 that allows or restricts the rotation of the fifth to seventh internal gears 72, 76, and 77 described above is used. The clutch mechanism 80 includes a worm gear 81 and a worm wheel 71a carved on the circumferential surface of the sixth carrier 71.
The inner end of the worm gear 81 is connected to the mounting member 10.
The worm gear is rotatably supported by a pivot pin 82 appropriately supported inside the worm gear, and a pivot shaft 83 protruding from the outer end of the worm gear is connected to the pivot pin 82 from the outside through an opening window 84 of the mounting member 10. Engaging and disengaging operations with respect to the sixth carrier 71 are performed by moving the fulcrum up and down. A winding setting switch 85 is disposed at the upper position of the rotating shaft 83.
The motor 24 is driven for fine adjustment via this switch 85. Note that each of these switches is connected to the support shaft 2.
It is connected to a motor 24 via a lead wire that passes through the inside of the motor 24 . Further, the rotation shaft 83 is constantly urged by a spring 86 in the direction of meshing with the sixth carrier 71.

When adjusting the setting position of the winding-side limit switch 63 using the clutch mechanism 80 configured in this way, the worm gear 81 normally meshes with the sixth carrier 71 to restrict rotation of the sixth carrier 71. Accordingly, rotation of the fifth to seventh internal gears is allowed, and the winding-side limit switch 63 is in an operable state. To make fine adjustments from this state, first push the rotation shaft 83 upward to allow rotation of the sixth carrier 71, and in conjunction with this, the winding setting switch 85 turns ON to drive the motor 24 and Rotate the take-up shaft 12.

When the predetermined winding position is reached, the rotary shaft 83 is moved down again to return to the original meshing position, and when this setting switch 85 is turned OFF, the rotation of the motor 24 is stopped and the desired position is immediately set. It can be adjusted to the setting position.

In this case, it is possible to reset the worm gear 81 in the disengaged state, that is, in the set state in which the so-called engagement grooves 78 match, and the setting operation can be easily performed.

Also, by rotating the worm gear 81 from the outside, the fifth to seventh internal gears 7
By turning 2, 76, and 77, the setting position can be easily finely adjusted.

The constituent members connected after the seventh sun gear 68 are arranged in the same way as the constituent members after the sixth sun gear 67 described above, and the winding-side limit switch 63 is replaced by a deployment-side limit switch 64. In addition, a deployment setting switch 87 is installed in place of the winding setting switch 85, and a deployment positioning operation and deployment positioning mechanism based on the same components can be obtained, so a description thereof will be omitted. do.

In FIG. 7, the forward/reverse motor 24 is
The motor is driven in forward and reverse directions by operating the reverse changeover switch 88, and is stopped when the switch 88 is in neutral.

Winding side limit switch 63, winding setting switch 85, and development side limit switch 64
and expansion setting switch 87 are
It is connected in parallel between the changeover switch 88 and the motor 24 on each line of reversal.

In the roll blind winding device configured in this way, the motor output is brought to a predetermined rotational speed via the first to fourth planetary gear reduction mechanisms 29 to 32 by the forward rotation or reverse rotation of the forward/reverse rotation motor 24. The rotational force is transmitted to the winding shaft 2, and the winding shaft 2 winds up the blind at a predetermined rotational speed.
Alternatively, when the blind is unfolded and reaches a predetermined setting position, the positioning mechanism section 8 is activated to stop the rotation of the motor 24, and the winding or unfolding position of the blind is automatically fixed, and the raising and lowering operation of the blind is completed. .

When manual operation is required, the pulley 59 is rotated in the forward or reverse direction by pulling the rope 60, thereby rotating the winding shaft 2 that is interlocked with the winding shaft 2, fixing the blind in a predetermined position, and winding the blind. Or use expanded.

In addition, when the winding width of the screen is long or the winding amount is large, a reinforcing winding pipe is fitted and fixed onto the winding shaft as appropriate depending on the required strength.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a main part showing a roll blind winding device. FIGS. 2 and 3 are enlarged longitudinal sectional side views of essential parts showing the self-locking mechanism. FIG. 4 is an enlarged longitudinal sectional front view showing the positioning mechanism of the device. Fifth
The figure and FIG. 6 are longitudinal enlarged side views of the main parts. 7th
The figure is a control circuit diagram of the motor. 1...Roll blind winding device, 2...
Winding shaft, 3... Drive section, 4... Reduction mechanism section,
5, 6...Self-lock section, 7...Manual winding section, 8...Blind positioning mechanism section, 21...
...Support shaft, 24...Forward/reverse motor, 29-32
...Planetary gear reduction mechanism, 59...Manual winding pulley.

Claims (1)

[Scope of Claims] 1. A screen winding device that controls a winding shaft in forward and reverse directions using forward and reverse outputs of a motor, the screen winding device comprising a plurality of stages of planetary gear mechanisms interlocked with the forward and reverse outputs of the winding shaft. A worm gear is provided between the output side of the winding shaft and the input side of the planetary gear mechanism, and is capable of engaging and disengaging the worm wheel interlocked with the planetary gear mechanism, and is rotatable from the outside. and a switch that drives the motor when the worm gear is disengaged, transmits the forward and reverse outputs of the winding shaft to the planetary gear mechanism when the worm gear is engaged, and transmits the forward and reverse outputs of the winding shaft to the planetary gear mechanism when the worm gear is disengaged. The switch is operated by cutting off conduction to the mechanism side, and the planetary gear mechanism is provided with internal gears each having a different rotation ratio, and each internal gear has one location on the outer peripheral surface thereof in the axial direction. A screen winding device characterized in that engaging grooves are carved, a position detection switch is provided to detect when each of these engagement grooves coincides in the axial direction, and the motor is stopped and controlled by the position detection switch. screen positioning mechanism.