JPS5841394B2 - Clutch/twisting mechanism in roll screen equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch/twisting mechanism in a roll screen device, and utilizes the elastic force of a built-in torsion coil spring to apply and accumulate and release and restore the elasticity of a curtain, blind, shutter ( In a roll screen device equipped with a clutch/twisting mechanism that pulls out, extends, rolls up and stores projection screens, projection screens, and other various screens, we improve the rated performance of the rotation system.
A clutch/torsion mechanism that has been improved to provide reliable operation by reducing the probability of errors when releasing the rolling elements, and stability in the stopped operating state by ensuring that the rolling elements are firmly gripped. It is related to.

In conventional roll screen devices, the various screens themselves are stretched vertically, in other words, along the vertical direction, and at the same time, the drawer and winding are also carried out using clutches and twisters installed at the top of the window frame, ceiling, etc. The starting point is a mechanical winding device.

In particular, in order to automate the winding process, a torsion coil spring is built into the screen winding tube, one end of which is fixed, and the other end is a rotating tube that rotates as the roll screen is pulled out.
When the drawer is extended, the torsion coil spring accumulates torsional elastic force, is stopped at an appropriate position, and is then released to be wound up.

Such stopping and further releasing movement corresponds to the engagement and release of the rotating system in the clutch/torsion mechanism, and an example of such a clutch/torsion mechanism is the ability to pull out or wind up a screen etc. by its own weight. The rotary cylinder is rotatably fitted onto the outside of the rotary cylinder to hold a gravity-type engaging pawl that is pivoted to the rotary cylinder (low cheater) so that it is released by the centrifugal action accompanying the rotational movement when it is taken up, and swings downward when it stops. It is a ratchet type stopping means that engages with teeth provided on a fixed shaft body (stator), and the other side is a ratchet type stopping means that is interposed between the inner and outer circumferential surfaces of the fixed shaft body and the rotating cylindrical body that fits onto the stator. This is a rolling element type stopping means in which rolling elements such as gravity rollers and gravity poles are released by centrifugal action, and when stopped, they fall under their own weight and are held between a fixed shaft body and a rotating cylindrical body.

In particular, when using a rolling element type stopping means, the rolling elements are retracted by centrifugal action during rotation, but they must be reliably gripped when stopping, whereas conventional methods do not grip the rolling elements reliably. The operation may be stopped even if the device is not pushed in, and as a result, the rolling element is released by a slight impact from the outside, and the screen etc. are unexpectedly rolled up and stored, making it extremely unstable.

In addition, when the rolling elements are released due to a slight pull-out operation, the rolling elements are once released but then gripped again, so there is an extremely high probability of errors in the release operation, making it inconvenient to use. .

Therefore, the present invention was created in view of the above points, and utilizes the elastic force of the built-in torsion coil spring to pull out, stretch, and wind up various screens etc. by applying and accumulating the elastic force and releasing and restoring the spring. It is a clutch/torsion mechanism that constitutes the rotation system that prevents the stator from the stator and low cheater in the roll screen device that is to be stored. As the low cheater rotates, the floating groove recessed in the inner circumferential surface of the low cheater, which is freely fitted to the outside, is intermittently matched with the free flowing groove, and the floating groove has a groove that moves away from the engagement groove due to its own weight. A falling rolling element is loaded in a freely movable manner, and the engagement groove faces the winding direction of the screen, etc., and has an engagement surface continuously formed on the outer circumferential surface of the stator through an approximately acute-angled starting end, and an engagement surface that faces the winding direction of the screen, etc. It has a release guide surface that faces and is continuously formed on the meshing surface, and the floating groove cooperates with the meshing surface to grip the rolling element against the winding direction, and the meshing arc surface. It has a retreating circular arc surface that is continuously located outside the engaging circular arc surface via a substantially acute-angled tip, and each of the engaging surface and the engaging circular arc surface has a curvature that approximately matches the diameter of the rolling element,
The centrifugal force exerted during the rotation of the low cheater allows the rolling elements to freely rotate while slidingly contacting the retreating arc surface,
When the rolling element is gripped, the diameter line of the rolling element passing through the intersection between the stake and the outer circumferential surface, which is the starting end of the engaging surface, is located deeper than the intersection with the inner circumferential direction of the low cheater, which is the starting end of the engaging circular arc surface. The rotating system is The smaller the steady angular velocity, rotation rate, and circumferential speed, the higher the performance will be. The meshing surfaces of the stakes and arms which exert a gripping action on the rolling elements in order to ensure that the acceleration of The engaging groove space including the stator is made as small as possible with respect to the outer circumference of the stator, and rolling elements with the smallest possible diameter are adopted, and the rolling elements are arranged on the engaging surface of the engaging groove of the stake and the engaging circular arc surface of the idler groove of the low cheater. By reducing the meshing area against the rolling element, the probability of incomplete or unnecessary biting when the rolling element is gripped is reduced, and at the same time, the meshing surface and the meshing arc surface are firmly gripped, so that it is easily released even by external impact. The first objective is to ensure stability in the stopped operating state.

An embodiment of the present invention will be described below with reference to the drawings.

The reference numeral 20 shown in the figure is a winding tube from which a retractable screen S used as a curtain, blind, shutter (lightweight shutter), projection screen, etc. is pulled out or wound up, and is made non-rotatable. It is installed horizontally or vertically by a fixed bracket member B1 that supports the device and a rotary support bracket member B2 that rotatably supports it.

Then, torsional elastic force is applied to one end of the winding tube 20 when the screen, etc. S is pulled out, and the screen, etc. S A spring shaft, that is, a clutch/twisting mechanism 100 for rewinding the spring shaft, is built in, and a roller end 90 is detachably fixed to the other end of the spring shaft 20.

The clutch/torsion mechanism 100 connects the stator 30, which is fixed at a specific position and angle when installed, to the rotor 40, which is fitted into the opening at one end of the winding cylinder 20, with a rolling element 50 such as a gravity pole or gravity roller interposed therebetween. The pillow 60 and the stator 30 are loaded and rotatably fitted outside to form a rotating system, and are also fitted inside at a predetermined position within the winding cylinder 20.
The fixed end of the torsion coil spring 80 is fitted onto the free inner core 70 which is mounted on the free inner core 70 with the inner core bushing 55 interposed between the stator 30 and the rotating end onto the pillow. The outer core 75 is connected between the stator 30 and the pillow 60, and is built into the winding tube 20 and is fitted onto the torsion coil spring 80.

Therefore, the stator 30 is fixed to the bracket member B1 by a metal fixing pin with a rectangular cross section that is integrally molded and buried in a protruding state without being pulled out or rotated when the synthetic resin stator body is molded. At 31, the bracket member B1
It is fitted and fixed into the substantially rectangular holding hole 12.

The stator main body forms a substantially rod-shaped stator shaft 32 whose axes coincide with each other and from which a holding pin 31 protrudes;
A flange-shaped cover plate is provided protruding from the end of the stator shaft 32 beside the holding pin 31, and an engaging groove 35 is provided in a stepped shaft portion 34 that is continuous with and protrudes from the cover plate. The switcher 36 that appears repellently is attached to the stator shaft 3.
2. A connecting groove 37 that protrudes from the other end of the stator shaft 32 and connects the torsion coil spring 80 is cut into the surface of the stator shaft 32 so as to communicate with the other end surface of the stator shaft 32, and further aligns the axis with the free inner core 70. A fitting pin 38 for rotatably fitting the inner core bushing 55 through the inner core bushing 55 is provided on the other end of the stator shaft 32 to align with the axis of the stator shaft 32 and protrude from the other end of the stator shaft 32. A rotating flange 30A having a diameter slightly larger than the diameter of the stepped shaft portion 34 is connected to the stator shaft 32 at the end of the stepped shaft portion 34.
A rotary flange 30B having a slightly larger diameter than the stator shaft 32 is provided in the middle of the stator shaft 32.

The low cheater 40, which is rotatably fitted onto the stator 30 without shifting in the axial direction, is formed of synthetic resin into a substantially cylindrical shape and has an inner diameter slightly larger than the outer diameter of the stator shaft 32.

That is, the structure of the low cheater 40 is such that a loading portion 41 having a contact end surface that comes into contact with the inner surface of the lid plate and a stepped inner curved surface that contacts the outer circumferential surface of the stepped shaft portion 34 is provided at one end. hand,
A floating groove 4 is provided on the inner circumferential surface of the loading portion 41, and the groove 4 is intermittently aligned with the retaining groove 35 as the low cheater 40 rotates.
2 is recessed and the winding tube 20 is fitted and fixed,
A fitting groove 44 having a locking surface for locking the opening end of the winding tube 20 is cut into the outer peripheral surface so as to communicate with the other end surface, and the other end surface is formed as an engaging end surface 45 for engaging the stopper 36. , and a fitting part 46 which is fitted and connected to the end of the outer core 75.
is provided at the other end, and a rotary stepped portion 40A that is slidably fitted onto the rotary flange 30A is continuously formed on the inner circumferential surface of the loading portion 41,
A rotating end 40B is formed on the inner circumferential surface of the cylinder to be slidably fitted onto the rotating flange 30B.

In addition, the floating groove 42 has inclined surfaces 42A and 33A that face each other at an appropriate interval along the rotation system axis and are inclined with respect to the axis.
This inclined surface 42A.

The rolling element 50 is freely loaded into the floating groove 42 so that it falls into the engaging groove 35 by its own weight along the line 33A.

The rolling elements 50 are, for example, steel balls or circular rollers commonly used as rolling elements in ball bearings.

On the other hand, the inclined surfaces 42A and 33A are arranged and formed in consideration of ease of molding and assembly.

That is, the floating groove 42 itself, which has a structure recessed from the abutting end surface at the same time, has only one slope Dfi 42A in the axial direction of the low cheater 40 axis, and the other slope surface 3
3A, a stepped shaft portion 34 is provided on the inner surface of the lid plate against which the contact end surface contacts when the low cheater 40 is fitted to the stator 30.
It is formed by making it continuous with the outer peripheral surface.

Regardless of whether the inclined surfaces 42A and 33A are installed horizontally or vertically, the rolling elements 50 in the floating grooves 42 are caused to jump out due to their own weight, and have a centripetal tendency, that is, the stator shaft 32 of the stator 30. The direction in which it is pushed aside or into the engagement groove 35 is selected.

Here, the inclined surfaces 42A and 33A in the illustrated example are parallel to each other, one inclined surface 42A has a spatial angle of approximately 60 degrees with respect to the rotation system axis, and the other inclined surface 33A has a spatial angle of approximately 120 degrees. ing.

Such inclined surfaces 33A and 4 of the engagement groove 35 and the floating groove 42
The adoption of the 2A structure, together with the adoption of gravity poles as the rolling elements 50, enables installation at all spatial angles, not just horizontal or vertical installation, making it suitable for use as a general roll screen device. In addition, when the stator 30 and rotor cheater 40 are fitted together, the rolling elements 50 are inserted into the idle groove 42 from the opening on the abutting end surface, and the abutting end surface is connected to the cover plate. The entire assembly is completed simply by abutting it against the inner surface, and it has the advantage of being easy to assemble.

Not only that, but also 30 stators and 40 low cheetahs.
Each shape is easy to mold, making it easy to assemble and disassemble for maintenance inspections after installation, and to easily perform maintenance such as replacing parts.

Further, the rolling element 50 itself must be gripped to reliably prevent rotation of the low cheater 40, be quickly released from its grip when reversed, and be retracted when rotated. Ru.

Therefore, the engagement groove 35 has an engagement surface 35B formed opposite to the winding direction when reversed due to the restoring elastic force of the torsion coil spring 80, and an engagement surface 35B formed opposite to the pull-out direction.
B has a release guide surface 35C continuously formed along the depth direction thereof.

On the other hand, the floating groove 42 cooperates with the engaging surface 35B to form the rolling element 5.
a meshing arcuate surface 42B that holds 0 against the winding direction;
Continuing from the meshing arcuate surface 42B, there is a retraction arcuate surface 42C located outside of the meshing arcuate surface 42B along its depth direction.

The centrifugal force exerted when the low cheater 40 rotates causes the rolling elements 50 to freely rotate while slidingly contacting the retreating arcuate surface 42C.

In order to ensure stability when gripping the rolling element 50, the engaging surface 35B and the engaging circular arc surface 42B are both formed to have a curvature of a diameter that approximately matches the diameter of the rolling element 50, thereby increasing adhesion and ensuring stability when gripping the rolling element 50. At this time, the diameter line of the rolling element 50 passing through the starting end 35D1 which is the starting end of the engaging surface 35B, that is, the intersection with the outer circumferential surface of the stake 30, is the starting end of the engaging surface 35B.
The diameter line of the rolling element 50 that passes along the inner side of the starting end, that is, the intersection with the inner circumferential surface of the low cheater 40 and the starting end of the meshing arc surface 42B, extends from the starting end 35D to the stator shaft 3.
2 Make sure it passes through the outside edge.

To release the rolling element 50 once held in its mouth, the Rocheetah 4
0 in the pull-out direction, and the rolling element 50 is moved to the engagement surface at the end of the retreating arc surface 42C on the opposite side of the starting end of the engagement arc surface 42B in the floating groove 42, that is, at the tip of the intersection with the inner circumferential surface of the low cheater 40. Push out from 35B, release guide surface 3
This is done by rolling it on 5C and pushing it out of the engagement groove 35.

Therefore, the release guide surface 35C gradually becomes shallower from the engagement surface 35B to its open end, and both 35
The engagement groove 35 itself, which is formed by continuous B and 35C, has a substantially J-shaped sandwiched shape in the cross section of the stepped shaft portion 34.

During the rotation of the low cheater 40, the rolling elements 50 are freely rolling in the idle groove 42 while being in sliding contact with the retreating arc surface 42C due to the centrifugal force applied, and the low cheater 40 itself is smoothly rotated during this period. In order to achieve rotation, the depth from the opening of the floating groove 42 to the retreating arcuate surface 42C, which is the inner part, is the same as that of the rolling element 50.
The radius of curvature of the retracting arc surface 42C is larger than the radius of the rolling element 5.
It is larger than that of 0.

Even though the retreating arcuate surface 42C is continuous with the engaging arcuate surface 42B, both 42
A continuous portion between B and 42C forms an acute-angled tip 42D.

In addition, the end of the retracting arc surface 42C is connected to the rolling element 5 as described above.
In order to smooth the repelling of 0 and furthermore the smooth guidance of the rolling element 50 falling into the engagement groove 35 after the rotation of the low cheater 40 is stopped, the end of the retracting arc surface 42C and the inner circumference of the low cheater 40 are The angle it makes with the surface is smaller than a right angle.

At that time, the difference between the depth of the floating groove 42 and the diameter of the rolling element 50 should be made as small as possible, so that the acceleration applied to the rolling element 50 when it falls to the side of the engagement groove 35 is minimized. This can reduce the angular velocity of the rolling element 50 in the direction of rotation of the low cheater 40, the rotation rate or circumferential speed of the rolling element 50 during revolution due to the rotation of the low cheater 40, and improve the performance of the clutch/torsion mechanism 100. improve.

In order to reduce the probability of errors when releasing the grip of the rolling element 50, the distance between the end of the engagement surface 35B and the end of the release guide surface 35C at the opening of the engagement groove 35 is made as small as possible, and the gap between the openings is made as small as possible. The ratio of the outer peripheral surface of the stator 30, in the illustrated embodiment, to the entire outer circumferential surface of the step-shaped shaft portion 34 is kept small, and the number thereof is kept small.

Therefore, even if the pull-out length of the screen, etc. S when releasing it, that is, the rotation angle of the rotation system, is small and irregular, the gravity pole 50 once ejected from the engagement groove 35
It is possible to prevent the grip from falling into the next engagement groove 35 again, thereby ensuring the release of the grip and the reliability of the operation.

Also, the rolling elements 50 when the low cheater 40 rotates once
The number of gripping positions can be freely selected.

That is, a large number of floating grooves 42 into which the rolling elements 50 can be loaded are provided, and when the stator 30 and the rotor 40 are fitted together and assembled, the rolling elements 50 corresponding to the desired number of stopping positions are selected. Furthermore, it is easy to adjust and change the interval of the drawing stop length of the screen S, etc.

On the other hand, the engagement groove 35 is formed at least on the outer surface of the stator shaft 32 of the stator 30, in the illustrated case, the stepped shaft portion 3
4. It is only necessary to provide one recess on the outer circumferential surface, and if the stator 30 is installed horizontally, there is a regularity in the support direction of the holding pins 31 when the stator 30 is fixed to the bracket member B1, so this should be taken into consideration. It is extremely preferable to provide a plurality of recesses so that they can be used in any direction.

Here, the holding of the stator 30 during horizontal installation also determines the position of the engagement groove 35, but in this case, the reliability when gripping the rolling element 50 in cooperation with the floating groove 42, and furthermore, , the smoothness of releasing this 50 must also be considered at the same time.

Therefore, the engagement groove 35 is set at a position rotated approximately 35 degrees relative to the gravity direction so that the release guide surface 35C of the engagement groove 35 is slightly inclined downward with respect to the horizontal plane in the gravity direction. There is.

Further, when the rolling element 50 starts to be gripped, the starting end 35D of the starting end of the engaging surface 35B in the engaging groove 35,
Engagement arc surface 42B1 in the floating groove 42, retreat arc surface 4
The protruding end portion 42D that connects both 2C and 2C is the rolling element 50.
A state in which the low cheater 40 is clamped is not preferable because even if the rotation of the low cheater 40 is temporarily prevented, the low cheater 40 may come off again with the addition of a slight external force.

To prevent this, the tip edge angle in the cross section of each of the starting end 35D1 and the tip 42D is made small, and the rolling element 50 itself is made small, so that when gripping starts, the tip edge moves the rolling element 50 in the gripping direction or in the gripping direction. The object is to be ejected in either of the ejecting directions to prevent an unstable clamped state from occurring (see Fig. 5).

Next, the assembly and fitting of the stator 30 and the low cheater 40 will be explained. This is done by using the resiliency of the stopper 36 provided protrudingly from the stator shaft 32 of the stator 30.

This stopper 36 has an inclined sliding surface and a retaining surface at the end of the stator shaft 32, protrudes and retracts into a cavity recessed along the central axis of the stator shaft 32, and is not engaged from the outside. The stator shaft 32 is integrally connected to the stator shaft 32 so that a release operation can be performed.

According to this, it is only necessary to push the loading part 41 of the rotator 40 into the end of the stator 30, and the stopper 36 after pushing returns to its original position by its own elastic force, and the engagement surface is fixed. By coming into contact with the engagement end surface 45, the low-take 40 is prevented from coming off and is reliably fitted in the correct position in a rotatable state with the stator 30.

On the other hand, the pillow 60 is formed of synthetic resin or the like in the shape of a rod having several steps, and has a shaft main body 61 on one end of which is attached to the needle circumferential surface.
A fitting groove 62 for fitting and fixing the winding tube 20 is cut,
A connecting groove 63 for connecting the torsion coil spring 80 is communicated with the other end surface of the shaft body 61 and cut into the surface of the shaft body 61, and the shaft center is aligned with the free inner core 70, so that the inner core bush 55 may be connected as the case may be. A fitting pin 64 is inserted between the shaft body 61 and the fitting pin 64 for rotatably fitting the fitting pin 70.
A fitting stepped portion 65 is formed which protrudes from the other end of the shaft body 61 so as to coincide with the axis, and into which the outer core 75 is fitted.

Further, the roller end 90 is formed of synthetic resin into a substantially bottomed cylindrical shape, and is pivoted at the bottom of the cylindrical body 91 in the shaft support hole 15 of the bracket member B2, so that the roller end 90 itself can be pulled out and removed. A fitting groove 9 is provided with a locking surface that locks the open end of the shaft support pin 92, which is integrally molded and embedded, and which locks the open end of the winding tube 20 in order to fit and secure the winding tube 20 therein.
4 are cut into the outer circumferential surface of the cylinder body 91 and communicated with each other from the open end surface of the cylinder body 91.

Further, the winding direction of the torsion coil spring 80 is set and formed in advance so that the screen or the like S is wound up when it is pulled out, and its cross section is shown as being approximately rectangular.

Both ends of the torsion coil spring 80 are connected bent ends that are bent inward, and one connected bent end whose fixed end is a flange is connected to the stator 30, and the other connected bent end whose rotating end is a flange. The bent ends are removably connected to the pillows 60, respectively.

The free inner core 70 is formed of synthetic resin or metal into a substantially cylindrical shape, and has the fitting pins 38 at both ends thereof.
, 64.

Further, the outer core 75 is formed into a cylindrical shape of synthetic resin or metal so that the torsion coil spring 80 is fitted therein,
One end thereof is fitted to the fitting part 46 of the low cheater 40, and the other end is fitted to the fitting step part 65 of the pillow 60, thereby preventing noise from the torsion coil spring 80 itself.
It is useful for preventing scattering of lubricants such as silicone oil and antirust oil, and for ensuring rust prevention, and provides completeness of the clutch/torsion mechanism 100 itself as a single mechanical component.

The present invention is constructed as described above and, in use, the stator 30 of the clutch/torsion mechanism 100
is firmly fixed to the bracket member B1, etc., and an appropriate tension is applied to the torsion coil spring 80 by rotating the stator 30 via the holding pin 31, depending on the weight of the screen etc. S, winding strength, etc. On the other hand, the bracket member Bl is pivotally supported by the bracket member B2 etc. at the roller end 90.

Install between B2 (see Figure 2).

Then, by sequentially pulling out the screens, etc., the winding tube 2
0. The pillow 60 is driven to rotate, and as a result, the torsion coil spring 80 whose one end is connected to the stator 30 is given a torsional elastic force.

At this time, the low cheater 40 is rotated around the stator 30, but when the screen, etc. Even if the low cheater 40 is retracted or falls into the engaging groove 35, it is projected from the retaining groove 35 along the release guide surface 35C, so that the low cheater 40 can be rotated smoothly.

After pulling out the screen, etc. S to a predetermined length in this way, if necessary, return it slightly so that the rolling element 50 is sandwiched between the engaging circular arc surface 42B and the engaging surface 35B, so that the rolling element 50 is held in its grip. By being inserted, the rotation of the low cheater 40 in the winding direction of the screen etc. S due to the restoring action of the torsion coil spring 80 in which torsional elastic force is accumulated is prevented (see FIG. 3).

Next, due to the rotation of the rotor monitor 40 caused by slightly pulling out the screen, etc.
0 to release the grip, and then release the screen S, etc., the rotation system will be accelerated by the restoring action of the torsion coil spring 80, and if the speed reaches a certain speed or higher, the clutch will remain in the released state. , the screen, etc. S is automatically wound up, and the rolling elements 50 at that time are retracted to the retracting circular arc surface 42C by centrifugal action, so that the smooth winding of the screen, etc. S is not impaired at all (
(See Figure 4).

Therefore, the engagement groove 3 recessed in the outer peripheral surface of the stator 30
5 and a floating groove 42 recessed in the inner peripheral surface of the low cheater 40 are intermittently opposed to each other as the low cheater 40 rotates, and the rolling element 50 loaded in the floating groove 42 is moved by its own weight. Since the retaining groove 35 is designed to fall into the side, after the operation of pulling out the screen, etc. S is stopped,
If necessary, by suppressing the elastic restoring force of the torsion coil spring 80 and slightly returning it, the rolling element 50 is held between the floating groove 42 and the engagement groove 35 to prevent rotation of the rotating system, and It is possible to fix and stop the pulled-out screen IJ-son, etc., depending on its length.

The rolling element 50 loaded in the idler groove 42 has a small difference between when it is in sliding contact with the retreating arc surface 42C and when it is positioned on the side of the engaging arc surface 42B, and at the same time, the rolling element 50 is not affected by the rotation of the low cheater 40. Since the rotational orbit radius of the accompanying rolling element 50 can be designed to be as large as possible and the apparent acceleration applied to it in the direction of the central axis can be minimized, the rotation system of the clutch/torsion mechanism 100 that performs the winding operation can be In,
The rated performance of the clutch/torsion mechanism 100 can be improved by reducing the angular velocity of the rolling element 50 with respect to the rotational direction of the low cheater 40, the rotation rate or circumferential speed of the low cheater 40 itself.

The engaging surface 35B of the engaging groove 35 and the engaging circular arc surface 4 of the floating groove 42
When the rolling element 50 gripped between the roller 2B and the screen S is released from the gripping state by a slight rotation of the low cheater 40 along the pull-out direction of the screen S, etc., the rolling element 50 is thrown out from the engagement groove 35. Even if it is accommodated in the floating groove 42, it is not preferable that it fall into the next engagement groove 35 again when it is rotated.

Therefore, the opening space of the engagement groove 35, that is, the engagement surface 35
By making the engagement groove 35 space including B as small as possible with respect to the entire circumference of the stator 30 axis, and by reducing the number thereof, the probability of error when releasing the rolling element 50 is reduced, and the reliability of operation is improved. can be improved.

The diameter of the rolling element 50 held between the engagement groove 35 and the idler groove 42 is large or small and does not affect the ability to prevent the rotor 40 from rotating. Because it is possible to reduce the meshing area of the meshing surface 35B1 and the meshing arc surface 42B,
Incomplete or unnecessary biting when the rolling element 50 is gripped, for example, the starting end 3 of the starting end of the engaging surface 35B of the engaging groove 35
5D and the engaging arc surface 42B1 of the floating groove 42, the retreating arc surface 4
It is possible to reduce the probability that the rolling element 50 will be caught between the protruding end portion 42D and the protruding end portion 42D between the contact surfaces 35B and 2C. Therefore, it is possible to improve its stability.

That is, the engagement surface 35B in the engagement groove 35 is continuous with the outer circumferential surface of the stator 30 via a starting end 35D having a substantially acute angle, while the engagement arcuate surface 42B and the retreating arcuate surface 42C in the floating groove 42 form an approximately acute angle. are continuous through the tip 42D of the rolling element 50, so when gripping the rolling element 50 starts, the tips of the starting edge 35D and the tip of the tip 42D each stop on the surface of the rolling element 50, but the rolling element 50 itself Coupled with the curved surface structure, the rolling element 50 is guided to either the retracting arc surface 42C or the engaging surface 35B, and the gripping of the rolling element 50 in an uncertain state is extremely reduced.
When once stopped, the engaging surface 35B, the engaging arc surface 42B
Due to the dependence of both, the state in which the operation is stopped is stable and safe.

In particular, the diameter line of the rolling element 50 passing through the intersection with the outer peripheral surface of the stator 30, which is the starting end 35D of the engaging surface 35B when the rolling element 50 is gripped, is the inner peripheral surface of the low cheater 40, which is the starting end of the engaging arc surface 42B. Since the diameter line of the rolling element 50 passes through the inner side from the intersection with the meshing arc surface 42B and passes through the outer side from the starting end 35D, both the meshing surface 35B and the meshing arc surface 42B When the rolling element 50 is held in its mouth by the cooperation of the two, the rolling element 50 does not move even slightly due to external impact or the like, and is extremely stable.

Moreover, when releasing the rolling element 50 held in the grip, the end of the retracting circular arc surface 42C in the idle groove 42 of the low cheater 40 rotated slightly in the pulling direction pushes out the rolling element 50, but the rolling element 50 as described above Considering the gripping position of the lower cheater 40, the angle between the end and the inner circumferential surface of the low cheater 40 is made smaller than a right angle, and this makes it easy to scoop into the retracting arc surface 42C, and the release operation It is also possible to improve the smoothness of the process.

From the above description, the embodiments of the present invention and the effects thereof are clear; however, it is easy to modify them to other shapes and structures, and the scope of the present invention is not limited to the above-described embodiments. is also clear.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of the roll screen device in use, Fig. 2 is a cross-sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is an operation 2 is a sectional view taken along the line 3-4 in FIG. 2 showing the stopped state, FIG. 4 is a sectional view taken along the line 3-4 in FIG. 2 when the stop is released, and FIG. 5 is an enlarged sectional view of the main part. S... Screen, etc., B1... Bracket member, 12... Holding hole, B2...
Bracket member, 15... Pivot hole, 20...
... Winding cylinder, 30 ... Stator, 30A ...
... Rotating flange, 30B... Rotating flange, 31... Holding pin, 32... Stator shaft, 33A... Inclined surface, 33B.
...Incline step surface, 34...Step-shaped shaft part, 3
5... Engagement groove, 35A... Inclined surface, 3
5B...Matching surface, 35C...Release guide surface, 35D...Starting end, 36...Stopper 37...Connection groove, 38 ...Mating Hin, 40...Low Cheetah 4OA...
...Rotating step section, 40B...Rotating end, 41...
...Loading section, 42...Idle groove, 42A...
... Inclined surface, 42B ... Meshing arc surface, 42
C...... Retraction arc surface, 42D... Tip end, 44... Fitting groove, 45... Engaging end surface, 46... Fitting portion, 50...Rolling element,
55... Inner core bush, 60...
... Pillow 61 ... Shaft body, 62 ...
- Fitting groove, 63... Connection groove, 64...
Fitting pin, 65... Fitting stepped portion, 70...
・Free inner core, 75... Outer core, 80... Torsion coil spring, 90...
Roller end, 91...Cylinder body, 92...
...Spindle pin, 94...Fitting groove, 100...
...Clutch/torsion mechanism.

Claims (1)

[Claims] 1 Utilizing the elastic force of the built-in torsion coil spring, the rotation system consisting of the stator and the rotor cheetah is configured in the roll screen device that pulls out, extends, winds and stores various screens etc. by applying and accumulating the elastic force and releasing and restoring the spring. It is a clutch/torsion mechanism that has an engagement groove recessed in the outer peripheral surface of the stator, which is fixed at a specific position angle when installed, and an idler groove recessed in the inner peripheral surface of the rotor, which is rotatably fitted to the stator. and are intermittently opposed to each other as the low cheater rotates, and the rolling groove is freely loaded with a rolling element that falls into the engaging groove by its own weight, and the engaging groove is fitted with a screen. The stator has an engaging surface that is continuously formed on the outer circumferential surface of the stator through a substantially acute-angled starting end facing the winding direction, and a release guide surface that is continuously formed on the engaging surface facing the pulling direction. , the floating groove has a meshing arc surface that cooperates with the meshing surface to hold the rolling element against the winding direction, and a meshing arc surface that extends outward from the meshing arc surface continuously via a substantially acute-angled tip on the meshing arc surface. The engaging surface and the mating arc surface each have a curvature that approximately matches the diameter of the rolling elements, and the rolling elements are slid onto the retracting arc surface by the centrifugal force that is applied when the low cheater rotates. In addition, the diameter line of the rolling element passing through the intersection between the stake and the outer peripheral surface, which is the starting end of the engaging surface when the rolling element is held in the mouth, is the starting end of the engaging arc surface. The diameter line of the rolling element, which passes along the inner side from the intersection with the circumferential surface and passes through the starting end of the engaging arc surface, passes outside from the starting end, so that the line between the end of the retreating arc surface and the inner circumferential surface of the low cheater A clutch/twisting mechanism in a rollscreen device characterized by an angle smaller than a right angle.