JPS6324787Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a winding braking device for roll screens, etc., and when winding the roll screen, etc., it suppresses the acceleration of the winding of the screen, etc. near the end of winding, and keeps the screen, etc. almost constant. The present invention relates to a winding braking device for a roll screen, etc., which can be wound up at a high speed, and which softens the impact at the end of winding the screen, etc. and improves durability.

As one method for winding up roll screens, etc., a ball clutch is used in which the elastic restoring force generated as the screen is pulled out is applied and accumulated to a built-in torsion coil spring, and the elastic restoring force applied and accumulated is provided at the shaft end. In some cases, the ball clutch is held in place during winding, and the ball clutch is released and the screen is wound around the winding shaft by the elastic restoring force.

The winding load during winding of the screen decreases as the winding of the screen progresses;
The winding speed increases as the winding of the screen progresses because the winding diameter increases, and therefore, as the winding of the screen ends, the weight bar fixed to the open end of the screen causes an impact on the roll screen device. This abutment causes damage to each component, resulting in problems in terms of durability, and also generates noise.

Therefore, this invention was devised in order to suppress the winding acceleration of the winding shaft and eliminate the above-mentioned inconvenience. A fixed pivot shaft rotatably protrudes from one end of the storage tube, one end of the linking means is connected to the fixed pivot shaft, and the other end of the linking means is connected to the input shaft of the braking means fixed to the storage barrel. is formed by a coil spring as a one-way clutch having a damper, and these connecting means and braking means are disposed within the housing cylinder.

Hereinafter, embodiments of this invention will be described based on the drawings.

In the figure, reference numeral 1 denotes a storage cylinder having a generally bottomed cylindrical shape. It consists of a cylindrical end portion 1B formed with approximately the same diameter as the outer diameter of the winding shaft T. A shaft support hole 1C from which the fixed pivot shaft 11 is rotatably protruded is formed at the center of the end surface of the cylinder end portion 1B.

Inside this housing cylinder 1, there is a linking means 10 consisting of the fixed pivot 11, a damper 12 by a coil spring 14 connected to the fixed pivot 11, and a one-way clutch 15 connected at one end to the damper 12. One-way clutch 15 of linkage means 10
The input shaft 26 is connected to the other end, and the machine frame 23
A braking means 20 is provided which is fixed within the housing cylinder 1 by a fixed platen 24 and a mounting cylinder 25.

The fixed shaft 11 is attached to the shaft cap C of the bracket B.
Square hole B of shaft stopper bush B1 fitted approximately in the center of
A square pin part 11A that is fitted and fixed to the square pin part 11A, a shaft support 11B that is formed continuously to this square pin part 11A and in which the shaft support hole 1C of the storage cylinder 1 rotates and slides, and a shaft support 11B that is continuous to this shaft support 11B. A collar portion 11C that is formed to prevent the damper coil spring 14 described later from falling off.
and an engagement shaft portion 11D with which the damper coil spring 14 engages.

The damper 12 is attached to the fixed pivot shaft 11 so as to face the engagement shaft portion 11D of the fixed pivot shaft 11 in the distal direction.
The engaging shaft portion 13A and the flange portion 1 are formed to have the same diameter as that of the
A damper shaft 13 is provided, and a shaft support projection 13D is formed at the tip of the damper shaft 13, and the damper shaft 13 is rotatably inserted into a shaft support hole 11E formed at the center of the front end surface of the fixed pivot shaft 11. , these fixed pivots 11
A damper coil spring 14 having an inner diameter slightly larger than the outer diameter of the engaging shaft portions 11D, 13A is attached to the engaging shaft portions 11D, 13A of the damper shaft 13, and the locking pieces 14A at both ends are attached to the engaging shaft portions. They are configured to be externally fitted and engaged with E-shaped spring locking grooves 11F and 13C formed on the circumferential surfaces of 11D and 13A.

The one-way clutch 15 has an engagement step 16 at an engagement step 13F on the back side of the flange 13B of the damper shaft 13.
B, and the shaft support projection 1 is engaged with the shaft support hole 13E.
The clutch shaft 16 is connected via the clutch shaft 16, the one-way clutch coil spring 17 is fitted onto the engagement shaft portion 16A of the clutch shaft 16, and the coil spring 17 is engaged with the engagement folded piece 17A at one end of the coil spring 17. An engagement plate 1 having a generally disk shape as a whole and having an engagement protrusion 18A on the periphery and to which an input shaft 26 of a braking means 20, which will be described later, is fixed.
It consists of 8. When the engagement plate 18 rotates in the direction in which the coil spring 17 is wound, the coil spring 17 is wound tightly around the clutch shaft 16, and the engagement plate 18 and the clutch shaft 16 are separated by the winding of the coil spring 7. When the engagement plate 18 rotates in the opposite direction to the winding direction of the coil spring 17, the coil spring 17 unwinds with respect to the clutch shaft 16. The clutch shaft 16 acts to be released.
The coil spring 17 slides and rotates on the circumferential surface, and the one-way clutch 15 is therefore disconnected.

The braking means 20 is integrally constructed by linking the reducer 22 to the drive shaft of a small motor 21, so that the motor 21 acts as a generator and the reducer 22 acts as a speed increaser. Machine frame 23 is stored in cylinder 1
At the same time, the output shaft as the reducer 22, that is, the input shaft 26 of the braking means 20 is fixed to the engagement plate 1 of the one-way clutch 15.
8 through the fitting hole 18B. and,
The motor 21 is equipped with a resistor 27 as a power generation load.
is connected. Incidentally, a plurality of mounting grooves 2 having a substantially semicircular cross section are formed on the inner wall surface of the storage cylinder 1 along the cylinder center of the storage cylinder 1, and the fixed platen 24 and the mounting cylinder 2
Engagement protrusions 24A and 25A are formed on the outer circumferential surface of the housing tube 5 so as to fit with the mounting groove 2. It is made so that it cannot rotate.

Further, the outer shape of the bearing portion 22A of the speed reducer 22 is formed by cutting out a part of the peripheral edge in a chord shape, and a fitting hole 24B into which the bearing portion 22A is fitted is formed in a fixed platen. 24 to prevent the motor 21 and reducer 22 from rotating within the housing cylinder 1.

Incidentally, instead of the connecting means 10 consisting of the damper 12 and the one-way clutch 15, as shown in FIG.
It's good as well.

In that case, the engagement shaft portion 11D of the fixed pivot 11
The engaging shaft portion 31A corresponding to the damper shaft 13 is formed into a tapered shape to provide the fixed pivot 11, and the engaging shaft portion 31A of the clutch shaft 32 corresponding to the damper shaft 13 is formed into a tapered shape.
2A has a tapered shape similar to the engaging shaft portion 31A, and a corrugated spring 30 is fitted onto the tapered engaging shaft portions 31A and 32A. coil spring 3
0 has an inner circumferential surface having the same diameter as the outer diameter of the large diameter portion of the engagement shaft portions 31A, 32A, and is formed with a rough pitch in the intermediate portion. Then, the clutch shaft 3 is inserted into the fitting hole 32B into which the input shaft 26 of the braking means 20 is fitted.
It is formed on two end faces so as to be connected to the braking means 20.

Further, the braking means 20 includes a reducer 22 and a motor 21.
Instead of using the rotational resistance generated by the power generation consisting of One friction disk is connected to the housing cylinder 1, and the other friction disk is connected to the connecting means 10, and the contact pressure of these friction disks can be changed by adjusting the screwing depth of a screw or the like.

This will explain its use next.

As shown in FIG. 3, the braking device according to this invention is used by being fitted onto the other end of a winding shaft T having a built-in spring motor M at one end. The spring motor M is a device that winds up the screen S using the elastic restoring force applied and accumulated in the torsion coil spring 50 when pulling out the screen S as a driving force, and includes, for example, a stator 52 attached to the bracket B via a square pin 51; A removable pillow 53 formed to have the same shape as the inner surface of the winding shaft T and fitted inside the winding shaft T to be integrated with the winding shaft T, and a stator 52
and an elongated cylindrical inner core 54 that connects the pillows 53 so that they can rotate freely, and a torsion core that fits onto the inner core 54 and connects one end to the stator 52 and the other end to the pillow 53 via a bent piece 50A. A coil spring 50, a rotator 55 which is rotatably fitted onto the stator 52, and which is internally fitted and fixed to the shaft end of the winding shaft T, and an engagement groove 52A and an idler groove formed on the rotational sliding surfaces of the stator 52 and the rotator 55. a clutch portion 57 formed with a groove 55A and a gravity ball 56 loaded into the floating groove 55A;
An outer core 58 is provided as necessary to connect the rotator 55 and the pillow 53 to each other, and is fitted onto the respective shaft ends to protect the torsion coil spring 50 and provide the spring motor M with completeness as a single item. Become.

In use, by pulling out the wound screen S, one end of which is fixed to the winding shaft T, the screen S is unfolded while imparting elastic force to the torsion coil spring 50 of the spring motor M. At this time, the one-way clutch 15 of the braking device is rotated in the unwinding direction of the coil spring 17, and the engaging shaft portion 1
Since it idles on 6A, it does not function as a braking device.

By pulling out the screen S to a required position and releasing the finger from the screen S, the winding shaft T is stopped by the clutch portion 57 of the spring motor M and stopped.

To rewind the screen S, pull out the screen S slightly to release the clamping and fixing state of the gravity ball 56 between the engagement groove 52A and the floating groove 55A, release the locking of the clutch portion 57, and release the torsion coil spring 50. Wind up the screen S with the rebound restoring force. At this time, the small motor 21 integrated with the winding shaft T rotates as the winding shaft T rotates. During this rotation in the winding direction, the one-way clutch 15 is in a connected state, so that the braking means 20 is connected to the fixed pivot 11.
The input shaft 26 is a damper 12 formed by a coil spring 14.
connected via. During a certain period of time at the initial stage of winding by the damper 12, that is, the time until the damper spring 14 is completely wound around the damper shaft 13, braking as a power generation load does not work, for example. Therefore, it is possible to secure a sufficient initial velocity to release the centrifugal clutch portion 57 at the initial stage of winding the screen S, and furthermore,
At the beginning of winding, the screen S can be smoothly rolled up without operating the braking means 20, and thus the entire winding time can be shortened.

Then, when the damper coil spring 14 is completely wrapped around the damper shaft 13, the small motor 21 as a generator connected by the reducer 22 starts to rotate, and thereby the rotation of the winding shaft T is braked. Become. Therefore, the acceleration of the winding shaft T for winding up the screen S can be suppressed.

As described above, this invention is constructed such that a fixed pivot 11 rotatably projects from one end of the storage tube 1, one end of the connecting means 10 is connected to the fixed pivot 11, and the other end of the connecting means 10 is attached to the housing tube. 1, and connects to the input shaft 26 of the braking means 20 fixed to the linking means 1.
0 is formed by a coil spring 17 as a one-way clutch 15 having a damper 12, so when the screen S is pulled out, the coil spring 17 of the one-way clutch 15 idles as described above, thereby preventing rotation of the winding shaft T. Not only does it not work as a load for pulling out, it can be operated easily, and when rewinding, the coil spring 17 of the one-way clutch 15 is pressed against the clutch shaft 1.
Since the winding shaft T is connected to the fixed pivot shaft 11 through the damper 12, it is possible to perform an appropriate braking action on the winding shaft T, which is accelerated toward the end of winding the screen S. It is possible.

Moreover, since the linking means 10 includes the damper 12, the braking does not work for a certain period of time at the beginning of winding the screen S, and the elastic force of the torsion coil spring 50 of the spring motor M can be fully utilized. Engagement groove 52A of centrifugal clutch portion 57
An initial velocity sufficient to release the ball 56 from its engagement with the floating groove 55A can be secured. Therefore, even in the early stage of winding, when the screen winding load is large, the screen S can be smoothly rolled up.

In addition, since the fixed pivot 11, the connecting means 10, and the braking means 20 are arranged inside the storage tube 1, the device configuration can be made compact, and the device can be completed as a single item. Axis T
It is extremely easy to attach to the winding shaft T, and it can also be attached to any existing type of winding shaft T. At that time, by preparing several types of small motors 21, that is, generators with different capacities and opposing contact pressures of friction plates, the shape and material of the screen S can be changed.
An optimal braking system can be provided depending on the capacity of the spring motor M, etc.

In addition, since the damper 12 and the one-way clutch 15 of the linking means 10 are formed by the coil springs 14, 17, and 30, the structure is simple, the number of parts can be reduced, and mass productivity is improved. It is also excellent.

As explained above, according to this invention, the acceleration of the screen winding shaft can be suppressed, the screen can be smoothly wound at a nearly constant speed, and the generation of impact force and noise at the end of winding can be suppressed. In addition to preventing this, the structure has a simple structure, provides the desired braking action, has excellent durability, and is highly suitable for mass production.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is an overall vertical cross-sectional view, Fig. 2 is an exploded perspective view, Fig. 3 is a partially cutaway front view of the device in use, and Fig. 4 is a cross-sectional view of the device. FIG. 1 is an overall vertical cross-sectional view showing an example. S...Screen, T...Take-up shaft, M...Spring motor, B...Bracket, C...Shaft rack cap, B1...Shaft stopper bush, B2...Square hole, 1...Storage tube, 1A ...Storage cylinder body, 1B...
...Cylinder end, 1C... Pivot hole, 2... Mounting groove, 10
...Connecting means, 11... Fixed pivot, 11A... Square pin part, 11B... Pivotal support, 11C... Flange part, 1
1D...Engagement shaft portion, 11E...Shaft support hole, 11F...
... Spring locking groove, 12 ... Damper, 13 ... Damper shaft, 13A ... Engagement shaft part, 13B ... Flange part,
13C...Lock groove, 13D...Spindle support protrusion, 13E
... Pivot support hole, 13F ... Engagement step, 14 ... Coil spring for damper, 14A ... Locking piece, 15 ...
...One-way clutch, 16...Clutch shaft, 16A
...Engagement shaft part, 16B...Engagement step part, 16C...
Pivot support projection, 17... Coil spring for one-way clutch, 17A... Engagement folded piece, 18... Engagement plate, 18
A... Engaging protrusion, 18B... Fitting hole, 20... Braking means, 21... Small motor, 22... Speed reducer,
22A...bearing part, 23...machine frame, 24...fixing plate, 24A...engaging protrusion, 24B...fitting hole, 2
5...Mounting tube, 25A...Engaging protrusion, 26...Input shaft, 27...Resistor, 30...Coil spring, 3
1...Fixed pivot, 31A...Engagement shaft, 32...
Clutch shaft, 32A... Engagement shaft portion, 32B... Fitting hole, 50... Torsion coil spring, 51... Square pin, 52... Stator, 52A... Engagement groove, 5
3...Pillow, 54...Inner core, 55...
Rotator, 55A... floating groove, 56... gravity ball, 57... clutch portion, 58... outer core.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A storage cylinder fitted to the end of the winding cylinder is provided, a fixed pivot shaft rotatably protrudes from one end of the storage cylinder, and one end of the connecting means is connected to the fixed pivot shaft. At the same time, the other end of the linking means is connected to the input shaft of a braking means fixed to the housing cylinder, and the linking means is formed by a coil spring as a one-way clutch having a damper, and these linking means and the braking means are disposed inside the housing cylinder. A winding braking device for a roll screen, etc., characterized by the following: 2. The connecting means includes a pair of tapered bodies that are rotatably held coaxially with each other so that their tapered tips face each other, and a coil spring having an inner diameter that is the same as the large diameter part of the tapered body. A winding braking device for a roll screen or the like as claimed in claim 1 of the registered utility model, which is constructed by disposing a coil spring on the outer peripheral surface of a tapered body. 3. The connecting means is provided with a pair of cylindrical bodies that are rotatably held coaxially with each other, and is provided with a coil spring that has engaging folded pieces at both ends and has an inner diameter slightly larger than the outer diameter of the cylindrical bodies. The coil spring is disposed in a cylindrical body so that its engagement folds engage with each other, and a one-way clutch made of a coil spring is connected to one side of the cylindrical body. A winding braking device such as a roll screen according to item 1. 4. The braking means is a winding braking system for a roll screen, etc. as set forth in any one of claims 1 to 3 of the utility model registration claims, which is constructed by connecting a reducer to the shaft of a small generator connected to a resistor. Device. 5. The braking means is constituted by a pair of friction plates facing each other and pressed into contact with each other.
A winding braking device such as a roll screen according to any one of items 1 to 3.