JPH0119516B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to various screens such as curtains, blinds, lightweight shutters, tents, and projection screens, which are rolled up and stored or rewound and used for unfolding. The present invention relates to a winding device.

(B) Background of the Invention Usually, 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 thereby driven by a motor via a speed reduction mechanism. An electromagnetic brake is used to fix the screen at its stop position, and this brake action is linked to the rotation stop operation of the motor to fix the screen, thereby preventing the screen from slipping off due to its own weight.

(c) Problems to be solved by the invention In the case of such a screen winding device, an electromagnetic brake must be installed in addition to the motor and its speed reduction mechanism, so there are many components and it is uneconomical. However, there is a problem that the device becomes large in size.

Therefore, the object of the present invention is to provide a screen winding device equipped with a simple self-locking mechanism that reliably locks the winding shaft when the motor is turned off, regardless of whether the motor is driven in either forward or reverse directions. shall be.

(d) Means for Solving the Problems This invention provides a means for controlling the winding shaft in the forward and reverse directions through a forward and reverse motor built into the winding shaft of the cylindrical body and a planetary gear reduction mechanism that reduces the output of this motor. A screen winding device that performs reverse control, wherein a fixed ring is fitted and fixed to the inner circumferential portion of the winding shaft, and a coil-shaped lock is attached with the outer circumferential surface of the fixed ring in sliding contact with the inner circumferential surface of the fixed ring. a drive carrier in which a locking spring is fitted, and in which both ends of the locking spring protrude inwardly facing each other to form protrusions, and are rotated by an output from the motor side; A driven carrier that is driven by the rotation and outputs to the winding shaft is provided with a shaft peripheral surface shaped like a half moon to form a half moon shaped shaft portion, and a driven carrier is provided between the protrusions of the lock spring. When the protrusion is rotated in the circumferential direction,
Insert the semicircular shaft portion of the drive carrier between the protrusions on the side where the sliding contact on the outer circumferential surface of the locking spring is in the loosening direction, and insert the half-moon-shaped shaft portion of the drive carrier between the protrusions on the side where the sliding contact on the outer circumferential surface of the locking spring is in the tightening direction. The half-moon-shaped shaft portion of the driven carrier is inserted between the protrusions, and a space is formed between the opposing end surfaces of the half-moon-shaped shaft portions of both carriers with each protrusion interposed therebetween to allow initial rotation of the protrusion. The screen winding device is characterized by a self-locking mechanism.

(E) Function In the screen winding device of the present invention, when the drive carrier is rotated by the output from the motor side, the protrusion of the locking spring is connected to the fixed ring at the circumferential end face of the half-moon-shaped shaft portion. Since the locking spring is rotated in the loosening direction, the locking spring slides and the driving carrier is allowed to rotate, and this rotation rotates the driven carrier and drives the winding shaft.

In both the forward and reverse rotation directions of the motor, the rotation of the drive carrier loosens the locking spring, making it possible to control the forward and reverse rotation from the motor.

Also, when rotating from the winding shaft side, whether it is forward or reverse rotation, the circumferential end surface of the half-moon shaft of the driven carrier will cause the protrusion of the locking spring to move against the fixed ring. Since it is rotated in the tightening direction, the locking spring does not rotate and the winding shaft is in a locked state.

Therefore, even if the screen slips down on the forward or reverse rotation side of the winding shaft, it is reliably locked.

(F) Effects of the Invention As a result of the above, according to the present invention, the self-locking mechanism includes a coiled spring and a fixed ring that slides into contact with the coiled spring, while achieving a reliable locking action.
Since it can be configured with both driving and driven carriers, it has a simple structure, has few components, and can be constructed at low cost.Moreover, since the lock acts on both forward and reverse rotation from the winding shaft, it is easy to assemble. There is no need to consider the direction of the locking spring during installation, making it easy to assemble.

(g) 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. In FIG. The drive section 3, the deceleration mechanism section 4, and the first
a self-locking section 5, a second self-locking section 6,
It is composed of 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 this mounting pin 13 is protruded from the end surface of the winding shaft 2, and a rotation stopper 14 formed on this protrusion is attached to a fixing member 14a on the wall surface. Mounted in a fixed manner.

Note that the inner end of this mounting pin 13 is connected to the steel ball 1.
The position is regulated by a receiving member 16 via 5.

On the other hand, the mounting member 10 on the other side (right end side in the figure)
In this case, 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 fixed case 19 is fitted on the other side. A rectangular fixing protrusion 20 that is externally fitted and protrudes from the center of the outer end surface of the fixing case 19 is fixedly supported and attached to the fixing member 14b on the 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 the outer rotor 2.
6 rotates, both ends of the rotor 26 are mounted on bearings 2.
It is pivotally supported on the support shaft 21 via 7 and 27.

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.・Controlled OFF.

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 The first planetary gear 34 that meshes with each other, the first internal gear 36 that meshes with each of the first and second stage planetary gears 34, 35, and the revolution output of the first planetary gear 34 are transmitted to the second stage. the first carrier 37 conducting to 30;
It consists of

A shaft serving as a second sun gear is protruded from the outer end of the first carrier 37, and the power is transmitted to the second stage 30 via the first carrier 37 which also serves as the second sun gear. The second stage 30 is connected to the third and fourth stages 31, 3 through a first self-locking section 5, which will be described later.
These second to fourth stage planetary gear reduction mechanisms 30, 31, 32 are
The motor output is transmitted to the fourth stage 32 with the same gear configuration as the first stage 29, 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. Rotate. In this case, in the fourth stage 32, the peripheral surface of the shaft end of the fourth carrier 38 is hexagonal,
It is fitted and fixed to a fifth carrier of a second self-locking portion, which will be described later, and is prevented from rotating. Therefore, the fourth planetary gear 39 is in a state where only rotation is allowed, and the second internal gear 40 corresponding to the third stage 31 and the fourth stage 32 is rotated, and based on the rotation of this gear 40, the corresponding The winding shaft 2 integrated with the gear 40 is rotated. In addition, the above-mentioned first and second
The internal gears 36 and 40 are integrally fitted onto the inner peripheral surface of the winding shaft 2.

Also, for the forward and reverse directions of the motor 24, a second
The internal gear 40 is the fourth planetary gear 39
Rotate in the opposite direction through.

The first self-locking section 5 described above has a self-locking function that automatically locks the position where the bright band is wound up and the position where it is unfolded and used in response to the load from the load side. It is composed of a ring 41, a locking spring 42, a second driving carrier 43, and a second driven carrier 44.

The above-mentioned fixed ring 41 is connected to the second internal gear 4
0, and is arranged between the second and third stage planetary gear reduction mechanisms 30 and 31,
A locking spring 42, which will be described later, is fitted onto the inner peripheral surface of the fixed ring 41.

The above-mentioned locking spring 42 is formed in a coil shape, and the outer peripheral surface of this spring 42 is connected to the above-mentioned fixing ring 41.
The spring 42 is fitted in a state in which it is in sliding contact with the inner circumferential surface of the spring 42, and protrusions 45, 45 that protrude inwardly and radially opposite each other are provided at both ends of the spring 42. It is in a state of being integrated with the fixed ring 41 due to the biasing force in the direction of diameter expansion.

Then, on the inner periphery of this spring 42, a slight gap is formed between the outer circumferential surfaces of the shaft parts of the second driving carrier 43 and the second driven carrier 44 and the inner circumferential surface of the spring 42. 43,44
The shaft portion of the spring 42 is fitted into the spring 42.

The above-mentioned second drive carrier 43 has a large-diameter shaft portion on the inner end side that pivotally supports each planetary gear 35 of the second stage planetary gear mechanism 30, and a small-diameter shaft portion on the outer end side that supports the planetary gears 35 in the axial direction. The above-mentioned spring 4 is formed with a half-moon shape in cross section.
2 from its inner end surface side.

The second driven carrier 44 has a small-diameter shaft portion on the inner end side formed in a semicircular cross section in the axial direction, and this shaft portion corresponds to the semicircular shaft portion of the second drive carrier 43 described above, and the spring 42 The third sun gear is inserted into the third stage from its outer end surface side, and the outer end side is provided to serve also as a third sun gear for the third stage planetary gear mechanism 31.

Furthermore, these carriers 43 and 44
On the inner circumferential surface of the spring 42, both protrusions 45, 45 of the spring 42 are interposed between the opposing surfaces of the meniscal shafts inserted into each other from both sides in the radial direction, and these protrusions 45 , 45 in the circumferential direction.

In this case, even if the second drive carrier 43 is rotated in either the forward or reverse direction, the spring 42 is set to initially rotate in the direction of loosening the spring 42 via the protrusion 45 on one side or the other side. 42 on one side. On the other hand, the second driven carrier 44 facing the opposite side has a protrusion 4 in both forward and reverse directions.
5 into the other side of the spring 42, which is set in the direction of tightening the spring 42.

Furthermore, the gap was set between the outer circumferential surfaces of these carriers 43 and 44 and the inner circumferential surface of the spring 42 when the diameter of the spring 42 was reduced and the fixing action of the spring was released by the lock release operation described later. This is to allow the inner and outer circumferential surfaces of the spring 42 to uniformly restrict diameter reduction in the circumferential direction without causing uneven contact. Reference numeral 47 denotes a spring housing cylinder fitted inside the fixed ring.

FIG. 2 shows a lock-off state in which rotation of the winding shaft 2 is allowed, in which the forward/reverse motor 24 rotates in the forward and clockwise direction, thereby causing the second internal gear 40 to rotate in the counterclockwise direction. The winding shaft 2, which is integrated with the winding shaft 2, rotates counterclockwise to extend the blind to a predetermined position and unfold it. The second drive carrier 43 is connected to the spring 4 through the protrusion 45 on one side within the allowable space 46.
2 in the direction in which it should be loosened, and then tighten the fixed ring 4.
By unlocking the spring 42 fixed to the second driven carrier 44, rotation with respect to the second driven carrier 44 is allowed, and power is transmitted to the subsequent stage.

FIG. 3 shows the lock-on state that restricts the rotation of the winding shaft 2. This locks on to stop the blind at that position when the blind is wound up or unfolded to a predetermined position. When the rotation of this motor 24 is stopped, the rotation of the winding shaft 2 is stopped, but at this time, a rotational force in the counterclockwise direction acts on the winding shaft 2 to cause it to further descend due to the weight of the blind. Although the second driven carrier 44 tries to rotate due to the action, at the beginning of the rotation of the second driven carrier 44, the spring 42 is rotated in the diametrical direction via the protrusion 45 on one side. Therefore, the spring 42 is integrally fixed to the fixed ring 41, and the rotation of the second driven carrier 44 is restricted. Therefore, a self-locking operation is automatically performed by the reaction force of the second driven carrier 44 corresponding to the load of the blind, and the counterclockwise rotation of the winding shaft 2 is naturally locked.

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.

Further, since the first self-locking portion 5 described above is provided symmetrically with respect to the circumferential direction, similar locking and unlocking operations are performed even when the motor is reversed.

In addition, since the locking and unlocking operations of the locking spring 42 are performed by the sliding action of the outer peripheral surface of the spring that expands and contracts, it is suitable that the linear cross section of the spring is rectangular so that the sliding resistance can be sufficiently large. .

The aforementioned second self-lock section 6 serves to transmit the output from the manual winding pulley (described later) to the winding shaft 2 and to lock the output from the winding shaft 2 side. 24, the rotation of the fifth carrier 48 that fixes the fourth carrier 38 mentioned above is locked to allow the rotation of the winding shaft 2, and at the same time, the rotation of the fifth carrier 48, which fixes the fourth carrier 38, is allowed. Blocks the conduction of

On the other hand, during manual winding operation, the lock is released to allow rotation of the fifth carrier 48, and the winding shaft 2 is rotated based on this.

This locking part 6 is connected to the outer side of the first self-locking part 5 with fifth and sixth planetary gear reduction mechanisms 49 and 50 for manual winding in between, and is the same mechanism as the first self-locking part 5. , the fixed ring 41 corresponds to the inner peripheral surface formed on the outer end side of the third internal gear 51, the second drive carrier 43 corresponds to the seventh drive carrier 52, and the second driven carrier 44 corresponds to the inner peripheral surface formed on the outer end side of the third internal gear 51. The seventh driven carrier 53 corresponds to the second planetary gear 35, and the seventh sun gear 54 for manual use connected to a manual winding pulley, which will be described later, corresponds to the second planetary gear 35. ,3
2 corresponds to the sixth and fifth stages 50 and 49, respectively, and have a similar locking effect, so their explanation will be omitted. In the figure, 55 is a support member, 56 is a blind, 57 is a sixth carrier, and 58 is a spring of the second self-locking portion.

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 seventh sun gear for manual use is provided on the circumferential surface of the inner end of the hollow shaft.
It meshes with the drive carrier.

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 38 which is integrated with the fifth carrier 48. 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 38 and 48 are fixed by the second self-locking part 6, the motor output will be 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 set 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, a pinion 6 is provided with a fourth internal gear 65 that is integrally fitted into the outer end opening of the winding shaft 2, and is equipped with gears of different diameters.
The large diameter gear No. 6 is engaged with the small diameter gear, and the eighth and ninth sun gears 67 and 68 are engaged with the small diameter gear on both sides, respectively.The eighth sun gear 67 side is on the winding side, and the ninth sun gear 68 side is on the deployment side. Provided for positioning.

The above-mentioned eighth 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 circumferential surface of the outer end of the small diameter shaft 69. Moreover, an eighth carrier 71 holding the shaft of a seventh planetary gear 70 that meshes with the sun gear is loosely fitted onto the small diameter shaft 69, and the rotation of the eighth carrier 71 is restricted by a clutch mechanism to be described later. There is. A fifth internal gear 72 corresponds to the seventh planetary gear 70, and this gear 72 has a small diameter gear shaft formed with a sun gear protruding from the center of its outer end surface.
Eighth planetary gears 73 are equally distributed on this gear shaft, and a ninth planetary gear connected thereto is rotated with its shaft held by a ninth carrier 75, respectively. A sixth internal gear 76 corresponds to the above-mentioned eighth planetary gear 73, and a seventh internal gear 77 independently corresponds to the ninth planetary gear 74.

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. Engagement grooves 78 of these gears 72, 76, 77...
When the lines are aligned, limit switch 6
Actuator 79 of No. 3 engages and operates OFF,
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 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 engages a worm gear 81 and a gear carved on the circumferential surface of the eighth carrier 71;
The worm gear 81 is rotatably supported at its inner end by a pivot pin 82 appropriately supported inside the mounting member 10, and a rotation shaft protruding from the outer end of the worm gear 81. 8
3 relative to the eighth carrier 71 from the outside through the opening window 84 of the mounting member 10 using the pivot pin 82 as a fulcrum, the release operation is performed. A winding setting switch 85 is disposed at the upper position of the rotating shaft 83, and the motor 24 is driven for fine adjustment via this switch 85.
Note that each of these switches is connected to the motor 24 via a lead wire 28 that passes through the support shaft 21. Further, the rotation shaft 83 is constantly urged by a spring 86 in the direction of meshing with the eighth 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 eighth carrier 71 to restrict rotation of the eighth carrier 71. This allows rotation of the fifth to seventh internal gears 72, 76, and 77, and the winding-side limit switch 63 is in an operable state. When making fine adjustments from this state, first
is pushed upward to allow rotation of the eighth carrier 71, and accordingly the winding setting switch 85 is
ON operates to drive the motor 24 and take up the winding shaft 12.
Rotate.

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, the worm gear 81 can be reset in the disengaged state, that is, the so-called set state in which the engagement grooves 78 are aligned, 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 to the ninth sun gear 68 and subsequent ones are arranged in the same way as the constituent members after the eighth sun gear 67 described above, and a developing side limit switch 64 is used instead of the winding side limit switch 63. 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 switching the reverse rotation selector switch 88, and is stopped when the switch 88 is in the neutral position.

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 reverse rotation.

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/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, for the winding shaft 2, if the winding width of the screen is long or the winding amount is large, a reinforcing winding pipe is fitted and fixed on 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. DESCRIPTION OF SYMBOLS 1... Roll blind winding device, 2... Winding shaft, 3... Drive section, 4... Reduction mechanism section, 5, 6... Self-locking section, 7... Manual winding section, 8... Blind positioning mechanism section, 41... Fixed ring, 42, 58
...Lock spring, 43...Second drive carrier, 44
...Second driven carrier, 45...Protrusion, 46...Permissible space portion.

Claims (1)

[Claims] 1. A screen winding device that controls the winding shaft in forward and reverse directions through a forward and reverse motor built into the winding shaft of a cylindrical body and a planetary gear reduction mechanism that reduces the output of this motor. A fixing ring is fitted and fixed onto the inner circumferential portion of the winding shaft, and a coiled locking spring is fitted onto the inner circumferential surface of the fixing ring with its outer circumferential surface in sliding contact, Both ends of the locking spring protrude inwardly facing each other in a radial direction to form protrusions, and a drive carrier rotates by the output from the motor side, and the winding is driven by the rotation of the drive carrier. A driven carrier for outputting to the shaft is provided by forming a half-moon-shaped shaft portion by making the peripheral surface of the shaft into a half-moon shape, and between the protrusions of the locking spring, the protrusions are rotated in the circumferential direction. Insert the semicircular shaft of the drive carrier between the protrusions on the side in which the sliding contact on the outer circumferential surface of the locking spring is in the loosening direction when the locking spring is moved, and the sliding contact on the outer circumferential surface of the locking spring is in the tightening direction. The half-moon-shaped shaft of the driven chilaria is inserted between the protrusions on the opposite side, and a space is created between the opposing end surfaces of the half-moon-shaped shafts of both carriers with each protrusion interposed between them to allow the initial rotation of the protrusion. A screen winding device with a self-locking mechanism.