JPS612644A - Screen stop position setting mechanism - Google Patents

Abstract

PURPOSE:To prevent shifting of screen stop position reliably by providing a time lag between the motor-off control under setting and the counter reset motion thereby releasing the reset motion after damping of inertia rotation of winding shaft. CONSTITUTION:A setting operation lever 58 operatable from the outside of system is provided to the screen stop position setting mechanism while first operating section 59 for performing ON-OFF control of motor through a switch lever 45 and second operating section 60 for operating the reset mechanism of counter 17 are provided to said lever 58. In order to bring the counter 17 into reset condition upon function of the operating section 59 where said lever 58 will turn a switch on, a time lag is provided between the operating sections 59, 60. Furthermore, third operating section 61 for securing the sun gear 22 of the differential mechanism 16 to said lever 58 upon provision of the rotation of winding shaft 2 through a planetary gear differential mechanism 16 to the counter 17, a time lag is also set between said operating sections 60, 61.

Description

Detailed Description of the Invention (a) Field of the Invention The present invention relates to a method for winding up or unfolding various screens such as curtains, blinds, lightweight shutters, tents, and projection screens. The present invention relates to an apparatus, and more particularly, to a screen stop position setting mechanism that sets the stop position of the screen when the screen is wound up and rolled out using the output of a motor.

(B) Background of the Invention When the winding shaft of the screen winding device described above is controlled in forward and reverse directions by the forward and reverse output of the motor and automatically stopped at the winding 4D E'i or unfolded position, the screen movement position must be controlled. A screen stop position setting mechanism that uses this detector to stop and control the motor drive must be installed.
You have to pull it.

In the screen stop position setting mechanism described above, for example, the screen moving wheel is replaced with the rotation ω of the winding shaft, the amount of rotation of this winding shaft is counted by a counter, and the counted value of the counter becomes the set value. A counter method for controlling the motor to stop may be considered.

In other words, when the rotation of the winding shaft □□□ is divided by a counter equipped with a plurality of counting wheels that sequentially advance and count, and when the first shift of this counter reaches a count value that stops the screen, It is conceivable to actuate the lever and turn off the switch to output an output to stop the motor t11''g.

By using the counter in this way, the device can be made compact and the positional accuracy can be improved.

However, in the case of the above-mentioned counter method, if you set the stop position of the screen at an arbitrary position, the count value of the counter will not be specified. Counter' o o
To set the value to ``o'' and stop the screen, it is necessary to sequentially subtract 9 from the base position and stop the motor when the above-mentioned set value ``o o o'' is detected. There is.

When setting the stop position of the screen mentioned above, the counter is usually equipped with a return mechanism that returns the count value to 'OOO', so operate this return mechanism to first set the counter value to 'OOO'. o o ” then this '
After moving the screen to the desired upper stop position while maintaining the "o o o" state, the motor is stopped, and at the same time, the return operation is released.

However, in order to simplify the above-mentioned t-even drive melt pressure control J3 and the return operation and release of the return mechanism, outputs are performed so that they are operated in conjunction with one operation member, so the above-mentioned When the motor is turned off as shown in FIG. 1, the return mechanism is simultaneously released and the counter 1 immediately becomes ready for counting.

On the other hand, the winding shaft rotates a little more convexly due to the weight inertia of the winding shaft and the screen, even though the motor is stopped at one stop. 'ooo'" value will be converted into a base number, and the value at the time of setting will be incorrect.

Therefore, if you use this setting as usual, the screen stop position will be incorrect by the amount of rotation calculated by the above-mentioned counter, and the screen stop position will be different from the set stop position and the stop position when actually used. A problem arises in that they do not match.

(C) Purpose of the Invention This invention provides a timer between the motor OFF control at the time of setting and the return operation of the counter, when setting the screen stop position using the counted value of the counter, thereby reducing the inertia of the winding shaft. To provide a screen stop position setting mechanism that eliminates the error in the stop position of the screen between setting and use by canceling the return operation of the counter from C when the rotation stops and the screen is always stopped at the set position. With the goal.

2) Summary of the Invention The present invention is provided with a setting operation lever that is operated from outside the device, and on this setting operation lever, a switch is operated to control OFF and ON of the motor via a switch lever. A first operation section and a second operation section for returning the counter return mechanism are provided, and each of these operation sections includes:
A time lag is provided between the two operating sections so that after the setting operation lever is switched from ON to OFF and the operation of the first operating section is completed, the counter returns to the operating state of the second operating section. It is characterized by a position setting raid at the screen stop J placed with installation number J.

Roughly speaking, when the rotation of the winding shaft is input to the counter via the planetary gear differential AM, the third operation is to operate the ring gear of the planetary gear differential mechanism to a fixed and rotatable state on the setting operation lever. This operating section is equipped with a screen stop that is arranged with a time lag between it and the second operating section so that the ring gear is fixed after the operation of the second operating section is completed. It is characterized by being a position setting mechanism.

(Effects of the Invention According to this invention, when setting the f:In input value of the screen, the setting operation lever for performing this setting operation includes a counter, such as a first operation part for turning the motor OFF and ON.) Since a time lag is set between the return mechanism and the second operating section, this time lag causes the motor to go to 0FFI! , the return operation of the counter return mechanism can be released, and the counter is reliably prevented from advancing due to the rotation of the weight inertia of the winding shaft, and the screen stop position can be set accurately without going out of order. .

This allows the actual stop position of the screen during use to be
This ensures that the screen does not deviate from the set stop position, and provides accurate screen stop control.

Furthermore, the above-mentioned counter is usually provided with an input wheel consisting of a gear in front of the 11 wheels of the smallest lower digit, and when a return operation is performed, this input wheel engages with the smallest lower digit counting wheel. The shift gear and its meshing are disengaged, but when the return operation is canceled, these input wheels and the shift gear are meshed again.

During this engagement, after the tooth tips of each gear collide, when the feed gear is turned in either the forward or reverse direction and engages, the set count value of the counter is incremented by the amount of rotation. Therefore, the stoppage when using the screen will be different from the setting.

However, the rotational output from the planetary gear differential mechanism or internal gear A, etc., of the minimum lower digit of the counter
By directly connecting several wheels and eliminating the need for gears to engage and disengage,
When the return operation is canceled, the counter does not advance based on the homemade tip of the tooth J, so that the counter is reliably prevented from going out of order.

Furthermore, there is a second
Since there is a time lag between the operating section of M8 and the 4 non-gears of the planetary gear differential mechanism in a fixed and rotatable state, there is a time lag between the operating section and the 4 non-gears of the planetary gear differential mechanism, so it is difficult to operate the setting value set on the counter. is independent from other operations, and the set value set in this counter is reliably prevented from being deviated by interference from other operations.

(f) Examples of the invention An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a screen stop position setting mechanism of a screen winding device. In FIG. 1, this screen winding device 1 is provided with a rotatable cylindrical winding shaft 2, and A suitable screen is wrapped around the
The screen is rolled up or unfolded by rotating the winding shaft 2 in the forward or reverse direction.

A support shaft 4 is connected to one end of the winding shaft 2 through a bearing 3.
is supported, and the other end is supported via a bearing 7 by a case 6 of a screen stop position setting machine @5, which will be described later. By being turned, the screen winding device 1 is fixed.

A motor 8, which is a drive source for the winding shaft 2, is housed inside the winding shaft 2 on the screen stop position setting device 5 side. On one side of the motor 8, a deceleration mechanism 9, such as a planetary deceleration mechanism, is housed.
The output of the above-mentioned 1-8 is decelerated by the deceleration mechanism 9, and the winding shaft 2 is driven by this deceleration output.

A self-locking mechanism 10 is housed on the other side of the motor 8, and when the motor 8 is stopped, the self-locking mechanism 10 locks the rotation of the motor 8 to prevent the screen from sliding down. prevent.

Reference numeral J3.11 is a condenser storage section, and a condenser for operation connected to the aforementioned motor 8 is housed therein.

Then, the motor 8, the speed reduction mechanism 9, the Zelflock doctor's side 10, the storage section 11 (the cylindrical fixed shaft 12
The inner end of this fixing @ 12 is supported by the inner wall of the winding shaft 2 via a suitable bearing, and the outer end is fixed to the position setting device 5 at the above-mentioned screen stop. is used as a housing portion for lead wires that connect the motor 8 and the power supply line to an external power supply line.

As shown in FIGS. 2 to 4, the screen stop position setting device 5 includes an upper limit stop position setting mechanism 14 for setting the upper limit of winding of the screen 13, and a lower limit stop position setting mechanism 15 for setting the lower limit for winding the screen 13. and these f9f4M1
4.15 operates in response to the forward and reverse rotations of the motor 8, and since the two mechanisms have the same output, only one mechanism will be explained.

That is, the above-mentioned stop position setting machines jf414 and σ15
has a 'ifi star gear differential mechanism 16 and a counter 17, the planetary gear differential mechanism 16 meshes with an internal gear 18 and an internal gear 19 of this gear 18, and is pivotally supported by a carrier 20. The external gear 23 is formed by a plurality of planetary gears 21 and a sun gear 22 that meshes with the planetary gears 21, and is formed on the outer peripheral surface of the internal gear 18 described above. The rotation of the winding shaft 2 is input by meshing with the formed internal gear 24.

The above-mentioned sangito 22 is fixed to a fixing shaft 25 installed on a support frame 32, which will be described later, and when the fixing shaft 25 is in the fixed state, the sangito 22 is fixed, so that the planetary gear differential mechanism 16fJl −+・Protrusion horns occur from Ritz 20.

Note that when the above-mentioned first gear 22 is in a rotatable state and there is something in the carrier 20, the output of the X-motor side 16 moves the sun gear 22 by IQ+, and the fourth rear gear 20 is not rotated.

The counter 17 mentioned above has a 3g counting wheel 27, 2°8.2
9 to the right, these A1 wheels 27 to 29t are supported in an idling state on the above-mentioned fixing shaft 25, and the set of wheels 27 with the minimum length is
is integrally connected, that is, directly connected, to the gear 11 rear 20 of the planetary gear differential mechanism 16 mentioned above.

A driving shaft 3 is located opposite the counting wheels 27 to 29 mentioned above.
The swing frame 31 is supported by the support shaft 33 against the support frame 32 so as to be able to move once. In addition, a spring 3 /I − (−Ef number wheel 27 ~
It is biased towards the 29 side. .

On one side of each of the aforementioned counting wheels 27 to 29, each of the counting wheels 27 to 29 is provided.
Gears 37 for rotating the 29... are formed in series, and on the other side there is an 81-number wheel 28 of the upper girder at one location on the circumference.
A shift pawl 38 for intermittently shifting the gears 29 is formed on the swing shaft 30 facing the position between the adjacent counting wheels 27 to 29. A shift gear 36 that meshes with the feed pawl 38 is supported in an idle rotation state.

Each counting wheel 27-29 of the counter 17 with the above-mentioned output
When each wheel is rotated 100 times, the counting wheel of the next upper digit is rotated by 1.
The number of gears is set so that it rotates, and the counting wheel 27 of the lowest lower digit rotates continuously, but the counting wheel 28.2 of the next stage and above
9 is an intermittent rotation due to one rotation of the digit feed claws 38.

Further, the counting wheel 29 of the largest upper digit is set to rotate less than one rotation relative to the maximum number of people moving the screen 13.

Then, when the counting wheel 27 of the lowest lower digit is rotated once by the carrier 20 of the differential mechanism 16 in the previous stage, the digit feed pawl 38 of the I number wheel 27 moves the digit gear 36 in the next stage to carry up. By moving and sequentially transmitting this carry rotation,
Each counting wheel 27-29 is shifted in sequence.

The amount of rotation of the binding and winding shaft 2 on the winding side or the unfolding side is counted by 54 by each of the 11 wheels 27 to 2 of the counter 17.

In addition, each counting wheel 2 of the counter 17 is also
The shift direction of 7-29 is the direction along which the screen 13 is moved toward the stop position. For example, in the case of lower limit setting, the shift direction of the screen 13 is added, that is, carried, when the screen 13 is moved in the unfolding direction. In addition, in the case of upper limit setting, addition and ij are carried up by movement in the winding direction.

Each of the above-mentioned AI number wheels 27 to 29, each digit feed gear 36° 36
, the set count value set as the upper limit or lower limit stop position of the screen 13 mentioned above, for example, °' o o
A return mechanism is formed to return the number state to the value of ``o''.

As shown in FIG. 5, the gears 37 of each counting wheel 27 to 29
A heart-shaped cam 39 is formed on the side surface, and a return lever 40 is connected to the swing frame 31 facing the cam 39, and the return lever 40 is operated by swinging the swing frame 31. When the cam 39 is in contact with the cam 39, the cam 39 is rotated by the contact pressure, and the cam 39 is moved to the regulation position 4.
1, and this regulation position 4
1 is formed with two contact portions that abut on the return lever 40 within a predetermined range, and when the straight portion of the return lever 40 comes into contact with these contact portions, the cam 39 is regulated to a fixed position. and,
By rotating the cam 39 to this fixed position, the counting wheels 27 to 29 are set as the stop position ('000' in the above example).
) can restore the counting state.

On the other hand, each of the above-mentioned digit feed gears 36, 36 has a square shaft portion 42.
... are formed on these square shaft portions 42, and when the swinging frame 31 is rocked (return operation), it comes into contact with the flat surface of the square shaft portion 42, and each shift gear 36 A return plate that aligns the rotating position of 36 to a constant position, that is, when the swinging operation is released, the tips of the feed gears 36, 36 and gears 37, 37 mesh without coming into contact with each other. 43・
The return plates 43 .

As shown in FIG. 6, a recess 44 is formed on the circumferential surface of the counting wheel 29 of the largest upper digit, and the upper side of the four counting wheels in the rotation direction of the two counting wheels forms a gentle slope 44a. The upper side is formed into a vertical surface 44b that coincides with the flat diameter direction.

A switch lever 45 is provided opposite to the above-mentioned counting wheel 29,
The base end of the switch lever 45 is pivotally connected to the support frame 32 via a shaft 46, and a rotor 47 is pivotally supported at an intermediate position by a pin 48 so as to face the circumferential surface of the counting wheel 29. There are three protrusions 49 in the tangential direction of the circumferential surface of the rotor 47 on the side facing the vertical surface 44b of the recess 44 described above. The protrusion 49 is formed to have a length shorter than the depth of the recess 44 described above, and is regulated in position by a stopper 50 so as to face the vertical surface 44b, and is urged toward the stopper 50 by a spring 51. ing.

The above-mentioned protrusion 49 normally comes into sliding contact with the circumferential surface of the counting wheel 29, and furthermore, the counting wheel 29 is reset by the above-mentioned cam 39 and the return lever 40, and the set count value (which is set as the stop position of the screen 13) It is positioned so that it fits into the recess 44 and moves toward the counting wheel 29 when it is at the value of "o o o" in the above example.

Furthermore, when the above-mentioned protrusion 49 is in the fitted state with the recess 44, when the counting wheel 29 further rotates, the protrusion 49 is fitted into the recess 4.
The switch is pushed by the shoulder of the vertical surface 44b of the rotor 47 and rotates against the spring 51, and this rotation brings the circumferential surface of the rotor 47 into sliding contact with the circumferential surface of the rotor wheel 29. The position of the lever 45 remains unchanged.

This operation is performed by moving the limit switch 52, which will be described later, to four wheels 29.
Even if the counting wheel 29 rotates further and the recess 44 exceeds the position of the protrusion 49, the limit switch 52 is prevented from being turned on.

A limit switch 52 for controlling the motor 8 to turn off is provided on the rear side of the 'llll end of the switch lever 45, and the push button 53'c of the switch lever 45
) Two square wheels are placed on the side.

The switch lever 45 has its protrusion 49 connected to the counting wheel 2.
When the protrusion 49 is fitted into the recess 44 of 9 and moves, the limit switch 52 is turned OFF based on this movement, and when the protrusion 49 is firmly in contact with the circumferential surface of the ε1 several wheels 29, the limit switch 52 is turned ON. It is designed to be manipulated.

As shown in FIG. 7a, a fixing spring 54 is fastened with its elastic horn to the outer end of the fixing shaft 25 passing through each of the counters 17, and one end of the fixing spring 54 is attached to the side surface of the support frame 32. The other end is open. When this open end is in the open state, the fixing shaft 25 is fixed by its tightening force, and when this open end is expanded,
The IW is loosened and the fixing shaft 250 becomes rotatable.

Furthermore, an end of the above-mentioned FIJ shaft 31 is projected from the side surface of the 3!2 holding frame 32 where the above-mentioned fixing spring 54 is located, and an actuation piece connected to the switch lever 45 is also provided. 5
6, and a setting operation lever 58 on which a six-wheel shaft 57 is pivotally supported is provided at a position corresponding to the spring 54, the swinging member 30, and the operating piece 56.

As shown in FIG. 8, the setting operation lever 58 has three operation parts 59, 6 each formed in a cam shape.
0.61 is provided.

The first operation part 59 is an actuation piece 56 of the switch lever 45.
The limit switch 52 is turned on via the switch lever 45.

The second operation unit 60 contacts and moves the swing shaft 30 of the counter 17, and swings the swing frame 31 via the swing shaft 30 to return the return mechanism. When the swing shaft 30 roughly rides on the circumference 60a, the returned state is maintained.

The third operating section 61 is configured to open the fixing spring 54 t1i'IN
The fixing shaft 2 is released by releasing the fastening of the spring 54.
When the spring 54 is unfixed and operated to be in a rotatable state, and the open end of the spring 54 rides on the circumference 61a, the rotatable state is maintained.

A time lag, that is, a gap between operations, is set for each of the above-mentioned operation sections 59 to 61 so that the operation timings are different between each of them.

That is, when the five first operating sections operate the switch lever 45 and the limit switch 52 is turned from ON to OFF, the second operating section 60 moves the swing shaft 30 to a position 60a on its circumference. After the second operating section 60 releases the returning operation of the counter 17, the third operating section 61 releases the first non-gear I22 via the fixing shaft 25. The time lag is set to be fixed.

Also, to explain from the operating direction of the setting operating lever 58, first the fixing spring 54 is released by the third operating part 61, and then, while this release is held, the second operating part 60 is moved to the J moving shaft 30. Then, with this swinging operation and the above-mentioned state of the spring 54 being held in the open state, the first operating portion 5 is
9 is set so that the switch lever 45 can be turned OFF and 0NIIJIl.

In order to regulate the operation positions of each of the above-mentioned operation parts 59 to 61, a regulation groove 62 is formed in the setting operation lever 58.
This regulation M groove 62 has three concave regulation parts 62a and 62b.
, 62c lfi formation cHL, cholera regulation part 62a
~62c is regulated in position by engaging with a pin 63 implanted in the case 6.

Note that this attachment is performed by elastic displacement of the outer wall of the regulating groove 62.

The setting operation lever 58 has a protrusion 64 for rotating the setting lever 58 by 1 degree, which is connected to the protrusion 64 so as to protrude outward from the case 6 .

FIG. 9 shows a drive circuit for the motor 8. The motor 8 is formed of a capacitor motor with two coils Ll and L2 connected in series and a capacitor C connected in parallel to these. In addition to turning the power OFF and ON, the motor 8 is operated to switch between forward and reverse rotation.

Further, the aforementioned limit switches 52 and 52 are outputted with normally open contacts, and are normally turned ON by the switch lever 45.

In this drive circuit, when the N source switch 65 is turned ON to the forward or reverse position, the motor 8 is driven to forward or reverse rotation via the limit switch 52.
2 is turned off, the motor 8 is stopped.

The operation of the screen stop position setting mechanism output in this way will be explained.

For example, the lower limit stop of the screen 13 (fffif, J
That is, when setting the deployed position, the lower limit stop position setting mechanism 15 is operated.

First, as shown in FIG. 7, when the above-mentioned setting operation lever 58 on the setting II mechanism 15 side is pulled up and operated to the regulating position 62a, during this raising process, the lever 58 escapes from the regulating part 62c. , the third operation part 61 pushes out the open end of the fixing spring 54, releases the fixing of the fixing shaft 25, and becomes rotatable relative to the Sanghi 1-221.

Furthermore, when the lever 58 reaches the regulating part 62 (9I'i7
(See Figure a), while the above-described fixing shaft 25 is held in the released state, the second operating portion 60 comes into contact with the swing shaft 30 of the return mechanism to swing the same.

By the above-described swinging operation of the swinging shaft 30, each digit feed tooth width 36 on the swinging shaft 30 is disengaged from each of the 81 wheels 27 to 29 of the counter 17, and at the same time, the swinging frame 31 is also swinged. Therefore, each return lever 40 connected to this is connected to each counting wheel 27 to 2.
When each of the different wheels 27 to 29 is not at the set position (the position of the set n1 value, for example, the value of 'o o o'), the pressing force of the return lever 40... is pressed. The cam 39... is at the regulating position 41... and the return lever 40.
... is rotated to a position where they are opposite to each other.

Note that since the counting wheel 27 of the lowest lower digit is directly connected to the Kirelia 20, this carrier 20 is rotated, and this rotation is allowed because the sanggi 1/22 is in a rotatable state as described above.

As mentioned above, when the cams 39 of each of the counting wheels 27 to 29 are returned to the set positions, the M number state of each of the counting wheels 27 to 29 is changed to the set word value ( For example, it is 116) of 'o o o', and the protrusion 49 of the rotor 47 of the switch lever 45 fits into the recess 44 of the counting wheel 29 of the largest upper digit.

That is, in this state, the stop position of the screen 13 is set on the count value side of the counter 17.

Furthermore, when the setting operation lever 58 reaches the regulating part 62a (see FIG. 7C), the above-mentioned return operation of the counter 17 is maintained, and the fixation of the fixing shaft 25 is released and the Zangi X.22 is rotated. The first operating portion 59 contacts the actuating piece 56 of the switch lever 45 to move it while maintaining the state in which this is enabled.

When the actuation piece 56 is operated as described above, the switch lever 45 is moved to the limit switch 52 side and turned on, and the power line to the motor 8 is turned on.

In this state, when the power switch 65 is turned on, for example, to the forward rotation side that unfolds the screen 13, the motor 8
is energized and rotated in the normal direction.

The rotation of the motor 8 rotates the winding @2 in the direction in which the screen 13 is expanded, and the screen 13 is expanded.

Further, the rotation of the winding shaft 20 described above is input from the internal gear 24 at the end to the interful gear 18 of the planetary gear differential mechanism 16, but the sun gear 22 of this differential mechanism 16 rotates as described above. Since it is in the movable state, the sun gear 22 is rotated, the carrier 20 maintains the stopped state, and the counter 1
No rotation amount is input to 7. Therefore, the counter 17 maintains the initially set numerical value of the stop position.

When the screen 13 is expanded and reaches the desired position by the drive of the motor 8 described above, the setting operation lever 58 is moved to the regulating portion 62a.
The control section 62b is then switched to the preceding regulating section 62b (see Fig. 7).

With this operation, the first operation part 59 releases the operation of the actuation piece 56 of the switch lever 45, so the limit switch 59
2 is turned off, and the motor 8 is controlled to stop.

When the motor 8 is stopped, the screen 13 rotates slightly due to the inertia caused by the suspension of the screen 13 and the winding shaft 2, and then stops.

During the above-mentioned inertia rotation, the setting operation lever 58 holds the return operation of the counter 17 and is located at the IJ regulating portion 62h, so the counter 17 is not stepped up to the set value t and the initial set value is maintained. Maintained.

After it is confirmed that the above-mentioned rotation of the weight due to inertia has stopped, the setting operation lever 58 is moved to the restriction part 62c, and during this movement process, the operation part 60 of the lever 58 is separated from the swing shaft 30 and released. .

With this release operation, each of the rocking operations of the rocking frame 31 is released, and when the rocking shaft 30 and the rocking frame 31 return to their original positions, the protrusion 49 of the rotor 47 of the switch lever 45 moves to the counter wheel 29. It is fitted back into the recess 44 and becomes the initially set value (for example, the value of 'o o o'), and each counting wheel 27
Since the gears 37 . . . 29 mesh with the respective shift gears 36 . . . , the counter 17 is allowed to rotate in steps.

When the aforementioned setting operation lever 58 reaches the restriction portion 62C (see Fig. 7a), the third operation portion 61 releases the opening end of the fixing spring 54, so that the fixing spring 54 elastically returns. The fixing shaft 25 is fixed by its tightening force, the sun gear 22 is fixed, and the rotation [il] can be input to the counter 17 from the winding shaft 2.

At the time when the setting operation lever 58 is placed in the restriction part 62c (when the setting operation is completed), the counting state of each counting wheel 27 to 29 of the counter 17 is already set to OFF when the limit switch 52 is turned off.
Since the count value has reached the lower limit stop position setting for the FF, the operation for setting the lower limit stop position on the screen 13 is completed.

Screen 13 with the lower limit position set as described above
In normal unfolding use, the motor 8 is driven in normal rotation from the winding position of the screen 13 to rotate the winding shaft 2 and the screen 13 is unfolded.

When the screen 13 mentioned above is located within the lower limit stop setting position (
(a value smaller than the set count value), counter 17
The recess 44 of the counting wheel 29 of the largest upper digit is the switch lever/
Since the protrusion 49 of the rotor 47 of I5 is not fitted, the limit switch 52 is in the ON state, and the power line of the motor 8 is in the ON state. Therefore, when the power switch 65 is turned on at the n eaves side, the motor 8 is driven and the screen 13 is expanded.

When the winding shaft 2 described above rotates, the rotation m is reflected by the counter 17 via the planetary gear differential mechanism 16, and the counter 17 steps in the carry direction to count the amount of rotation.

”: When the counter 17 counts the set rotation amount (set count value) of the lower limit stop position, the recess 44 of the uppermost digit 1 wheel 29 engages with the protrusion 49 of the rotor 47 of the switch lever 45. However, the switch lever 45 is movable.

With this movement, the limit switch 52 is turned OFF!
Then, the screen 13 is stopped at the lower limit stop position.

In addition, if the counting wheel 29 of the upper digit becomes A-balun due to the weight (fi nature) of the screen 13 or the winding shaft 2, or an incorrect operation in setting operation 1.'1, the above-mentioned screen 13 Four parts of the vertical surface 44b of the recess 44 of the ring 29 push the protrusion 49 of the rotor 47, and as shown by the imaginary line in FIG. The switch lever 4 has its circumferential surface slidingly in contact with the circumferential surface of the counting wheel 29.
5 is not moved. Therefore, the switch lever 45 keeps the limit switch 52 in the OFF state,
The motor 8 is not re-driven.

Further, when the counting wheel 29 is reversed from the A-balun position of the counting wheel 29 described above, the projections 49 of the rotor 47 are urged toward the cutting wheel 29 by the spring 51, so that the recess 44 is By facing each other, the four protrusions of the rotor 47 fit into the recesses 44, and the protrusions 49 can return to their original positions.

According to the screen stop position lit setting mechanism of the above-described embodiment, when the screen 13 is wound or unfolded by operating the setting operation lever 58 to the regulating part 62a and the screen 13 moves to the desired position, the setting is performed. If you operate the control lever 58 to the restriction part 62b to confirm that the movement of the screen 13 has stopped, then operate the setting operation lever 58 to the restriction part 62c, the setting of the stop position is completed and the screen 13 stops. The position can be set with a simple operation, and there is no error when setting the b counter 17, so it can be set using a normal screen 13.
It can be stopped at the setting (ff) in the used section.

In addition, in the above-mentioned embodiment, the unfolding direction of the screen 13,
Although the operation for setting the lower limit stop position has been described, the operation for setting the upper limit stop position is similar to the above-mentioned operation and involves operating the upper limit stop position setting [414, so the explanation thereof will be omitted.

Moreover, in the above-mentioned embodiment, at the stage before the counter 17,
When this counter 17 is reset, the input is turned OFF.
When the input key 1ν is inserted, the planetary gear differential I
M16 can be output simply as a spur gear.

J3 corresponds to the output between this invention and the embodiment, the return mechanism corresponds to the swing shaft 30.1, the swing frame 31, the hm 39, and the return lever 40, and the switch corresponds to the limit switch 52, The operating lever corresponds to the setting operating lever 58, and other outputs correspond to the same component names in the embodiment.

[Brief explanation of drawings]

Drawings [Showing one embodiment of the present invention, Fig. 81 is an output diagram showing a schematic mechanism of the winding device 291-2 in cross section, Fig. 2 is an exploded perspective view of the screen stop position setting device, and Fig. 3 is its Cross-sectional view, Figure 4 is an exploded perspective view of the stop position setting mechanism, Figure 5 is a left side view of the counting wheel, Figure 6 is a right side view of a part of the switch lever, Figures 7 a, b
, c is a front view of a portion of the setting operation lever and an explanatory diagram showing its working state, FIG. 8 is a perspective view of the setting operation lever, and FIG. 9 is a power supply circuit diagram. 1... Screen winding device 2... Winding shaft 8
...Motor 13...Screen 14...
Upper limit stop position setting mechanism 15...Lower limit stop [Position setting mechanism 16...Planetary gear differential mechanism 17...Counter 18...Internal gear 20...Carrier 22...Sangi 1!25
...For fixing @ To 27/29...31 Several wheels 3
0... Swing axis 31... Swing frame 39...
Cam 40...Return lever 44...Concave
Part 45...Switch lever 54...Fixing spring' 58...Five setting operation levers...First
Operation section 60...Second operation section 61...Third operation section 62a, 62b, 62c--Restriction section Fig. 5, Fig. 6, Fig. 7a, Fig. 7, Fig. 7C

Claims (1)

[Claims] 1. A motor is provided that winds or unfolds the screen by controlling the winding shaft around which the screen is wound in forward and reverse directions, and the amount of rotation inputted from the winding shaft is sequentially shifted and counted. The counter is provided with a counter having a plurality of counting wheels, and the counter is provided with a return mechanism that returns the counting state of the counter to the set count value set as the stop position of the screen. A switch lever that detects and moves when a count value is counted is provided, and a switch that turns off the motor by moving the switch lever is provided opposite to the switch lever, and is operated from outside the device. A setting operation lever is provided, and the setting operation lever is provided with a first operation part for turning the switch OFF and ON via the switch lever, and a second operation part for returning the return mechanism of the counter. , Each of these operating sections is operated so that after the operation of the first operating section, in which the setting operating lever operates the switch from ON to OFF, the operating state of the second operating section is set, in which the counter returns to the state. A screen stop position setting mechanism with a time lag between sections. 2. Provide a motor that winds or unfolds the screen by controlling the winding shaft around which the screen is wound in forward and reverse directions, and inputs the rotation of the winding shaft to one of the internal gears or carriers of the planetary gear differential mechanism. At the same time, the rotation is output from the other side, and the sun gear is fixed and rotatable, and the rotation output from the planetary gear differential mechanism is directly input to the counting wheel of the lowest lower digit, and the A counter is provided with a plurality of counting wheels that sequentially advance and count the amount of movement, and this counter is provided with a return mechanism that returns the counting state of the counter to the set count value set as the stop position of the screen, is provided with a switch lever that detects and moves when the counter counts a set count value, and a switch is provided with the switch lever that turns off the motor by moving the switch lever. A setting operation lever that is operated from outside the device is provided, and the setting operation lever includes a first operation section that operates the switch OFF and ON via the switch lever, and a return operation of the return mechanism of the counter. A second operating section and a third operating section for operating the sun gear in a fixed and rotatable state are provided, and each of these operating sections is connected to the first operating section when the setting operating lever operates the switch from ON to OFF. After the operation is completed, the second operation part is in the operation state in which the counter is in the return state, and after the operation of the second operation part is finished, the third operation part is in the operation state in which the sun gear is fixed. Screen stop position setting mechanism with a time lag between each operating section.