JPS6056758A - Screen winding device - Google Patents

Abstract

PURPOSE:To prevent lengthening of a positioning control mechanism for a screen and simplify adjustment of stopping position by providing the plural number of steps of planetary gear mechanisms and a clutch mechanism on the winding shaft of a winding device for a screen such as a blind or the like. CONSTITUTION:The plural number of steps of planetary gear mechanisms 29-32 coupled with regular/reverse output of a winding shaft 2 are continuously provided, while a clutch mechanism 80, which conducts and intercepts regular and reverse output of the winding shaft 2, is provided between the output side of the winding shaft 2 and the input side of said planetary gear mechanisms 29-32. Regular/reverse output of the winding shaft 2 is conducted to and intercepted from said planetary gear mechanisms 29-32 through the clutch mechanism 80. Said mechanisms 29-32 are provided with respective internal gears with different ratio of rotation, and engagement grooves are carved axially on the outer periphery of these internal gears. A position detecting switch, which detects a time when engagement grooves coincide in axial direction with each other, is provided and stoppage of a motor 24 is controlled by means of this switch.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a J: Una screen that can be used to roll up and store or unwind various screens such as curtains, blinds, lightweight shutters, tents, and projection screens. The present invention relates to a winding device.

(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 is turned ON to automatically stop the screen. A stop operation is being performed (for example, Japanese Patent Publication No. 49-47116).

However, as an operation control means for such a stop switch, the stop switch is operated by being equipped with a so-called feed screw MIM, which is the axial feeding operation of a pinion that reciprocates along a long threaded rod. As the positioning range of the screen stop position is increased, a longer threaded rod is required, so the screen positioning control mechanism has been forced to have a longer length due to this feed screw mechanism.

In particular, it was unsuitable and could not be used for screens with a short winding width.

(c) Object of the Invention Therefore, an object of the present invention is to provide a screen winding device that can easily adjust the screen stop position without increasing the length of the screen positioning control mechanism.

(D) Summary of the Invention This invention provides a planetary gear f! that is linked to the forward and reverse outputs of the winding shaft. Jf 4fa are arranged in multiple stages, and a clutch mechanism is installed between the output side of the winding shaft and the input side next to the planetary gear jXl to transmit and cut off the forward and reverse outputs of the winding shaft, Through this clutch mechanism, the forward and reverse outputs of the winding shaft are transmitted to and cut off from the planetary gear mechanism, and these planetary and planetary gear mechanisms are provided with respective internal gears having different rotation ratios. One engagement groove is cut in the axial direction on the outer circumferential surface of each motor, and a position detection switch is provided to detect when each of these engagement grooves aligns in the axial direction.This position detection switch stops the motor. The invention is characterized in that it is a controlled screen winding device.

(E) Effects of the Invention According to the present invention, since the planetary gear mechanism is used as a means for controlling only the rotating machine 414 in the circumferential direction, it is possible to make the device compact without covering 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 width, which is particularly effective for small screens with short winding widths.

Furthermore, by combining an internal gear with a large rotation W 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, since the power transmission to the planetary gear mechanism can be interrupted by operating the clutch mechanism, the clutch mechanism can be operated to the disconnecting side with each engagement groove aligned in a straight line, and in that state the screen can be moved to the desired position. After the screen is moved upwardly and downwardly to the position where it should be stopped, by releasing the blocking action of this clutch mechanism, the desired screen stop position can be easily set without disturbing the alignment of the respective engagement grooves.

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 operating the clutch mechanism, and the work of determining the screen stop position is extremely simple.

(f) Examples of the invention An embodiment of the present 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 sunshading and light protection.
In the figure, this roll blind winding device 1 includes a winding shaft 2 equipped with a blind (not shown), a drive section 3, a deceleration mechanism section 4, a first self-locking section 5, and a second self-locking section 5.
It is composed of a 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. The mounting for this includes members 9 and 1o, respectively.

For installation on the negative side (left end side in the figure), the member 9 is attached to an end plate 11 fitted inside the front end of the winding shaft 2 via a bearing 12 in order to block conduction from the winding shaft 2. For installation, use pin 1
3 is attached, and in this installation, the outer end of the pin 13 is protruded from the end surface of the winding shaft 2, and the rotation stopper 14 formed on this protrusion is fixedly held to a fixing member (not shown) on the wall surface. installed.

In addition, in this installation, the position of the inner end of the pin 13 is regulated by a receiving member 16 with a steel ball 15 interposed therebetween.

On the other hand, the member 10 on the other side (the right end side in the figure) is attached to a connecting ring 18 which is pivotally supported at the open end of the winding shaft 2 via a bearing 17 in order to cut off conduction from the winding shaft 2. One side is fitted internally, and the other side is fitted and fixed externally with a fixing case 19 having a square cross section. A square fixing protrusion 20 protruding from the center of the outer end surface of one of the fixing cases is attached to a fixing member on the wall (Fig. It is fixedly supported and installed on the outside).

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 the fixed case 19, and is held in place by a fixing pin 20a. 2
The winding shaft 2 is inserted circumferentially inside the winding shaft 2 and is supported by a bearing 23 on the inner circumferential surface of the winding shaft 2 via a support ring 22 . and,
Each drive mechanism for the winding shaft 2, which will be described later, is mounted on the fixed support shaft 21.

The drive unit 3 of (front) E is composed of, for example, an outer rotor type forward/reverse rotation motor 24, and this forward/reverse rotation motor 24 rotates around the outer periphery of a stator 25 fixed to the shaft at the inner end of the support shaft 21. In order for the outer rotor 26 to rotate, both ends of the rotor 26 are connected to the support shaft 21 via bearings 27 and 27.
It is pivoted on top.

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 is 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. , O
FF controlled.

At this time, the outer rotor 26 is rotated and stopped, and the output of the outer rotor 26 is transmitted to the reducer 1 which will be described later.
The winding shaft 2 is rotated by being transmitted to the i4 section.

The reduction mechanism section 4 of the earth and il is a small-sized, high-output 1st to 4th stage 'M2 gear reduction mechanism 29.30゜31.
．． 32 are arranged in series on the support shaft 21,
The two first stages include a first sun gear 33 that is integrally connected to the outer end of the outer rotor 26 and rotates, a first planetary gear 34 that meshes with this, and the first to third stages. A first internal gear 37 that meshes with each of the planetary gears 34, 35, 36..., and a first gear 738 that transmits the revolution output of the first planetary gear 34... to the second stage 30. Consists of Rikihi and others.

A second sun gear is provided at the outer end of the first carrier 38.
C has a protruding shaft, and is connected to the second stage 30 via a first carrier 38 which also serves as a second sun gear. In this way, the second to fourth stage planetary float reduction mechanisms 30,
31 and 32, the motor output is transmitted to the fourth stage 32 with a similar gear configuration, and in the fourth stage 32, the speed is reduced to a predetermined rotational force, and the winding shaft 2 is rotated at a constant speed. make it move.

In this case, in the fourth stage 32, the circular surfaces of the three shaft ends of the fourth carriers are hexagonal, and are fitted and fixed to the fifth carrier of the second self-locking part located at the rear i2B'l to prevent rotation. . Therefore, the fourth planetary gear/IO is in a state where only rotation is allowed, and the second planetary gear/IO corresponding to this fourth stage 32 is
The internal gear 41 is rotated, and based on the rotation of the gear 41, the winding shaft 2 that is integrated with the gear 41 is rotated. Note that the first internal gear 31 shown in FIG.

The above-mentioned first locking section 5 is installed as a locking means for locking the blind in the rolled-up position, unfolded position, and used position. It has a self-locking function that locks the
As shown in the figure 1'J, 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 the fixed ring 43 that holds this gear/11. The second internal gear A741 is allowed to rotate within a very small range where the protrusion 42 is restricted by the recess 471 of the lever, and the second internal gear A741 is automatically rotated by the reaction force of the second internal gear 41 corresponding to the load of the blind. A self-locking function is provided.

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 forward and reverse directions, respectively.

A shaft 48.
48 is integrally formed, this shaft 48° 48 is supported by a fixed ring 43, and both ratchet pawls 4, 6, 47 are biased in the meshing direction by a leaf spring 49 supported by this fixed ring 43. has been done.

The width of the engaging portion of the ratchet pawls 46 and 47 is set so as to exceed the width of the ratchet pawl v45 and enter the notch 5o of the second internal gear 41, and 2 internal gear 41 is formed with release cam surfaces 51.52, and these release cam surfaces 51.52 engage and release the ratchet pawl 46.4.7 in response to the forward and reverse outputs of the motor 24. is operated within the minute rotation range regulated by the protrusion 42 and recess 44 of the second internal gear 41.

The second internal gear 41 rotates in the opposite direction to the forward and reverse directions of the motor 24 via the fourth planetary gear 4°.

Figure 2 shows a lock-on state in which rotation of the winding shaft 2 is allowed, and this occurs when the forward/reverse motor 2/I rotates forward and
direction, thereby causing the second internal gear w/l
-1 rotates counterclockwise, and the winding shaft 2 integrated therewith rotates counterclockwise to unfold the blind to a predetermined position. At this time, the release cam surface 52 pushes up the lower surface of the ratchet pawl 47 against the leaf spring 49, and the ratchet pawl 4
7 and the ratchet gear 45, the second
The internal gear 41 is allowed to rotate counterclockwise. Note that since the ratchet pawl 46 on the other side now revolves over the ratchet 1 to gear 45 of the fixed fourth gear V rear 39, there is no problem with rotation.

Fig. 3 shows a lock-on state in which the rotation of the winding shaft 2 is restricted, and this means that when the blind is truncated or unfolded at a predetermined position, the blind is locked on at that position so as to be set in the l position. Therefore, when the rotation of the motor 24 is stopped, the rotation of the winding shaft 2 is stopped. At this time, a counterclockwise rotating 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
The release cam surface 52 rotates within a minute range where it engages with the protrusion 42, and with this rotation, the release cam surface 52 touches the T surface J of the ratchet pawl 47.
The ratchet pawl 47 is separated and receives the biasing force of the leaf spring 49, and engages with the ratchet gear 45 to naturally lock the counterclockwise rotation of the winding shaft 2.

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

In the case of motor reverse rotation, the release cam surface 51 releases the engagement of the ratchet pawl 46 with the rotation of the second internal gear 41, 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 4, 6, and 47 corresponding to the forward and reverse rotation of the motor output are disengaged, the first self-locking portion 5 is in the disengaged state, and the winding shaft 27 is able to close the blind. It is rotated for winding.

Note that 53 and 53 are stoppers for the ratchet pawl, and 54 is a cover for the ratchet pawl portion, which is attached to the fixed ring 43.

The first winding unit 5 configured in this manner transmits the output from the motor 24 side to the winding shaft 2.
Lock the output from the side.

The above-mentioned second self-locking section 6 transmits the output from the manual winding pulley (described later) to the winding shaft 2 and locks the output from the winding shaft 2 side, and serves to lock the output from the winding shaft 2 side. During the winding operation, the rotation of the fifth kit rear 55 that fixes the fourth carrier 39 described above is locked to allow rotation of the winding shaft 2, and at the same time, the transmission to the manual winding pulley is prevented. On the other hand, during manual winding operation, the lock is released to allow rotation of the fifth carrier 55, and the winding shaft 2 is rotated based on this.

This locking mechanism is connected to the outer side of the first self-locking part 5 with a bearing 56 in between.
The fifth planetary gear 57 corresponds to the aforementioned fourth planetary gear t40, the third internal gear 58 corresponds to the second internal gear 41, and the fifth carrier 55 corresponds to the fourth carrier 39. The inner end of the connecting ring 18 corresponds to the fixed ring 43 and has a similar locking effect, so a description thereof will be omitted.

The manual winding section 7 mentioned above is, for example, a manual winding pulley 5.
9 is rotatably disposed on the outer end of the support shaft 21 and can be rotated from the outside, and a rope for rotating the pulley 59 is provided on the outer peripheral surface of the pulley 59. 60
, and is attached vertically below the lower surface of the member 10. Furthermore, a hollow shaft for transmission is protruded from the central part of the inner end side of the pulley 59 and extends along the support shaft 21, and a fifth sun gear for manual use is provided on the circumferential surface of the inner end of the hollow shaft. and meshes with the fifth planetary gear 57 of the second self-locking portion 6 described above.

In the manual winding section 7 configured as described above, the output during manual operation via the pulley 59 unlocks the second self-locking section 6, and thereby the fourth self-locking section 7 integrated with the fifth carrier 55
The carrier 39 is rotated, and based on this rotation, 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 located on the opposite side, both carriers 39.55 are fixed to the second self-locking portion 6. , the motor output is not transmitted to the manual winding section 7 side.

The above-mentioned blind positioning mechanism section 8 is for positioning each of the set positions of the winding setting position when the blind is wound up and stored, and the unfolding setting position when the blind is rewound and used for unfolding and IC. The positioning operation is performed by a planetary gear mechanism 61 for positioning the winding, which positions the winding shaft 2 in accordance with the amount of rotation thereof, and a planetary gear mechanism 62 for positioning the winding.
The combination U with each limit switch 63 and 64 corresponding to these is made up of 14.

As shown in FIGS. 4 to 6, the planetary gear mechanism 61 for positioning the winding described above includes a fourth internal V for output that is integrally fitted into the outer end opening of the winding shaft 2. A large gear of a pinion 66 having gears of different diameters is engaged with the gear 65, and the small diameter gear has sixth and seventh gears t-67 on both sides thereof.
, 68 are meshed with each other, the sixth sun gear C7 side is provided for positioning on the winding side, and the seventh sun gear 68 side is provided for positioning on the deployment side.

The above-mentioned sixth sun gear 67 has a small diameter shaft 69 protruding from the center of its outer end surface, and a non-gear is formed on the curved surface of the outer end of the small diameter shaft 69. Further, a sixth carrier 71 holding the shaft of a sixth gear 70 that meshes with the Zang gear is loosely fitted above the six small-diameter shafts, and this sixth carrier 71 is rotated by a clutch mechanism to be described later. regulated. A fifth internal gear 72 corresponds to the sixth planetary gear 70, and this gear p72 has a small-diameter gear shaft protruding from the central part of its outer end surface, and a seventh Planetary gears 73 .
5 and are held and revolved respectively. A sixth internal gear 76 corresponds to the seventh planetary gear 73 described above,
The eighth planetary gear 74 has a fin internal gear 77.
correspond to each other independently.

And these fifth to fifth internal gears 72.76
．． 77, a take-up side limit switch 63 is installed, and these gears are formed with the same diameter on the outer circumferential surface and with different rotation ratios, and a are the engagement grooves 78 in the axial direction, respectively.
to be engraved. When the engagement grooves 78 of these gears 1772, 76, 77 align with the - straight line, the actuator 79 of the limit switch 63 engages and turns off, stopping the rotation of the motor 24 and winding. Fix the position. The above-mentioned winding-side limit switch 63 is set to the ON state when not operated, and is set to the OFF state when the winding position is reached.

Next, when finely adjusting the winding position of the blind, use the fifth to fifth internal gears 72, 76, 7 described above.
The clutch mechanism 80 allows or restricts the rotation of the sixth carrier IN 80, and this clutch mechanism IN 80 has a worm gear 81 and a groove A carved on the circular surface of the sixth carrier 710.
The worm gear 81 is rotatably supported at its inner end by a pivot pin 82 which is appropriately supported inside the member 10. The rotation shaft 83 protruding from the outer end is attached by vertically operating the pivot pin 82 from the outside through the opening window 84 of the member 10, and engages and releases the sixth carrier 71. will be carried out. A winding setting switch 8 is located at the upper position of the rotation shaft 83.
5 is provided, and the motor 24 is driven for fine adjustment via this switch 85. Q: Each of these switches is connected to the motor 24 via a lead wire that passes through the support shaft 21. Further, the rotation wheel 83 is connected to the sixth carrier 7 by a spring 86.
When adjusting the setting position of the take-up side limit switch 63 using the clutch mechanism 80 configured in this manner, which is always biased in the direction of meshing with the sixth carrier 71, the worm gear 81 normally meshes with the sixth carrier 71. 6th carrier 7
1, thereby allowing rotation of the fifth to fifth internal gears, 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 is turned ON to drive the motor 24 and Rotate the take-up shaft 12.

When the predetermined winding position is reached, the rotating shaft 83
Move down to return to the original engagement position, and press this setting switch 8.
5 is turned off, the rotation of the motor 24 is stopped and the desired setting position can be adjusted immediately.

In this case, the settings can be made again with the engagement grooves 81 disengaged, the so-called engagement grooves 78, and so on matched, and the setting operation can be performed with ft1I.
You can simply do it.

Also, by rotating the A-mugito 81 from the outside, the fifth to fifth internal gears 72, 76, 77
You can easily make fine adjustments to the setting position by rotating the .

The structural members connected to the sixth sun gear 67 and subsequent parts of (front) 4() are those that are arranged in parallel with the sixth sun gear 67 and subsequent structural parts (A), and are connected to the winding side limit switch 63. Instead, a deployment side limit 1 switch 64 is installed, and a deployment setting switch 87 is installed in place of the winding setting switch 85, and the deployment positioning operation and deployment positioning mechanism are based on similar components. is obtained, so its explanation will be omitted.

In FIG. 7, the forward/reverse motor 24 is driven in the forward/reverse direction by switching the forward/reverse changeover switch 88, and is stopped when the switch 88 is in the neutral position.

The winding side limit] switch 63 and the winding setting switch 85 and the unfolding side limit switch 64 and the unfolding setting switch 87 are connected between the selector switch 88 and the motor 24 on each line of the forward and reverse directions of the motor 24. connected in parallel.

The roll blind winding device configured in this manner changes the motor output to the first and fourth TI star gear reduction mechanisms 29 to 32 by normal rotation or reverse rotation of the stop/reverse motor 24.
The rotational speed is reduced to a predetermined speed through , B) The positioning mechanism section 8 operates to stop the rotation of the motor 24, automatically fixing the winding or unfolding position of the blind, and completing the raising and lowering operation of the blind.

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 rope, fixing the blind in one predetermined position, and winding it up. Or use expanded.

Although a worm gear is used as the clutch mechanism used in the tj reset positioning in the above embodiment, the present invention is not limited to this, and other members may be used.

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

BRIEF DESCRIPTION OF THE 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 vertical 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. FIGS. 5 and 6 are enlarged vertical side views of the main parts thereof. FIG. 7 is a control circuit diagram of the motor. 1... Roll blind winding device 2... Winding shaft 3... Drive section 4... Reduction j* mechanism section 5.6... Self-locking section 7... Manual winding section 8 ...Blind positioning mechanism section 21...Support shaft 24...Forward/reverse motors 29-3
2... 5 planetary gear reduction mechanisms... 8 hand winding pulleys Figure 2 Figure 3 Figure 4 Figure 5 Figure 0

Claims (1)

[Claims] 1. A screen winding device that controls the winding shaft in forward and reverse directions using the forward and reverse outputs of a motor, the screen winding device controlling the forward and reverse directions of the winding shaft.
A clutch mechanism in which a plurality of planetary gear mechanisms linked to the reverse rotation output are arranged in series, and the forward and reverse outputs of the winding shaft are transmitted and cut off between the output side of the winding shaft and the input side of the planetary gear mechanism. The forward and reverse outputs of the winding shaft are transmitted to and cut off to the i-star gear mechanism through this clutch mechanism, and these planetary gear mechanisms are provided with the rotation ratio of each internal gear adjusted respectively. Engagement grooves are carved in the axial direction at one place on the outer circumferential surface of each internal gear, and a position detection switch is provided to detect when each of these engagement grooves aligns in the axial direction. A screen winding device characterized by controlling a motor to stop.