JP2571202Y2 - Scroll open / close device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for opening and closing a roll (for example, a curtain). The target scrolls include not only curtains but also curtains made by knitting thin bamboo or the like, but they have a structure that can be opened and closed by being wrapped around a shaft and unwound.

[0002]

2. Description of the Related Art Curtains partially block the incidence of light from the outside, and also have the effect of keeping the room warm and soundproof, but also have the effect of decorating the room. There are many types of curtains,
Broadly speaking, there are curtains that can be opened and closed by sliding along a rail along the upper rail of a window, and curtains that can be opened and closed by sliding up and down. The curtain to which the present invention is directed is a curtain of a type in which a rotating shaft is provided on an upper crosspiece of a window, and the curtain is wound around the shaft, rewound, and opened and closed.

As this type of curtain opening / closing device, there is known a "wind-up type electric curtain device" disclosed in JP-A-1-293809. This device uses a motor as opening / closing means, and the motor is mounted in a winding pipe. It is housed and rotates the winding pipe through a gear. Therefore, pressing the switch rotates the take-up shaft, and the curtain can be opened and closed. However, the opening and closing movement is slow, and there is a problem in terms of cost, such as requiring wiring work to be a power source of the motor. Therefore, a coil spring is used in place of the motor, the coil spring is housed in the winding shaft, and when the curtain is pulled down, it is pulled by hand, and when the winding shaft is rotated, the coil spring is twisted to pull up the curtain. Is of a type that utilizes the return torque of a twisted coil spring.

If the winding shaft is rotated by a motor,
The curtain can be stopped at a predetermined height by operating the clutch at the same time as the stop of the motor.However, in the winding shaft using the coil spring, the rotation lock mechanism of the shaft is not stable, so that Position of the curtain is not fixed correctly. This is why curtains of this type are not so popular. Further, the curtain is a thin cloth using cloth, and a scroll such as a blind made by knitting a thin bamboo material or a bar material cannot be rolled up.
Of course, the stationary position of the screen cannot be stabilized.

[0005]

As described above, the conventional opening / closing apparatus for a wind-up curtain has the above-mentioned problems.
The problems that the present invention seeks to solve are these problems.
Provided is a scroll opening / closing device that can stop accurately at a desired position without using a motor and can wind up not only a cross curtain but also a curtain.

[0006]

The scroll according to the present invention is:
It can cover all kinds of scrolls that can be stored by wrapping, such as conventional curtains, curtains, and winter curtains. For this reason, the opening / closing device for the scroll has a structure that can wind up even a thing like a curtain. Basically, it has a structure in which a roll is wound around a winding shaft.The winding shaft is a hollow tube, which is supported by a fixed shaft inserted into the hollow, and a coil spring is provided between the fixed shaft and the fixed shaft. The coil spring has a structure in which the coil spring is twisted if the winding shaft rotates.

A roll such as a curtain is wound around the take-up shaft. If the end of the roll is manually pulled, the wound roll is rewound. I do. The winding shaft is rotated by pulling the roll, and the coil spring is twisted with the rotation. Therefore, the scroll is wound around the winding shaft using the torsion torque. To release the lock mechanism,
This is done by pulling the scroll once.

The feature of the present invention resides in this lock mechanism, in which the reverse rotation (rotation in the winding direction) of the winding shaft is permitted for every forward rotation of one step. Then, after the next forward rotation, the lock is released and the reel is rotated in the reverse direction to take up the scroll. The lock mechanism includes a roller and a roller guide that come into contact with the inner peripheral surface of the winding shaft, a guide plate, and a control device for controlling the winding direction rotation angle of the guide plate. The induction board holds the above-mentioned rollers, the outer periphery of the roller guide has a smooth curved surface, changes the interval between the inner peripheral surface of the winding shaft, and the roller interposed therebetween, with the outer peripheral surface of the roller guide. It is bitten between the inner peripheral surfaces of the winding shaft. Then, the rotation of the take-up shaft is regulated, but depending on the magnitude of the rotation angle of the guide plate in the take-up direction, the rollers may or may not bite. It is the rotation angle control device that regulates the magnitude of the rotation angle in the winding direction. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0009]

FIG. 1a shows a roll-up curtain, and FIG. 1b shows a roll-up curtain. The curtain 1 and the curtain 2 are wound and stored on a winding shaft, and the handle 1 and the curtain 2 are lowered by pulling the handle 3 when necessary. The curtain 1 and the curtain 2, which have been lowered to the required height, stop at that position without being lifted by releasing the handle 3. That is, a lock mechanism described later operates. In order to wind up the curtain 1 and the curtain 2 once lowered, the lock mechanism is released by slightly lowering the curtain 1 and the curtain 2 again, and if the handle 3 is released, the curtain 1 and the curtain 2 are released. 2 rises and is wound on a winding shaft.

FIG. 2 is an embodiment showing the inside of the winding shaft 4. The take-up shaft 4 has a hollow inside and a bracket 5
, And can rotate. A coil spring 7 is provided between the fixed shaft 6 and the winding shaft 4. One end 8 of the coil spring 7 is fixed to the fixed shaft 6, and the other end 9 is fixed to the winding shaft 4. Therefore, if the winding shaft 4 is rotated, the coil spring 7
Is twisted. A lock mechanism 10 is provided on one side of the winding shaft 4 and regulates the rotation of the winding shaft 4.

The lock mechanism 10 has a guide plate 11, a roller 12, a roller guide 13, and a rolling member 14, as shown in an enlarged sectional view of FIG. The rollers 12, 12 are engaged and locked between them. The roller 12 may have any shape as long as it can rotate, but generally a thin cylindrical body is used.
1 is loosely fitted in the guide groove 15 formed therein. The outer circumferential surface 16 of the roller guide 13 forms a smooth curved surface, and the interval between the roller guide 13 and the inner circumferential surface 17 of the winding shaft 4 is not constant but varies.

FIG. 3 shows a case where the winding shaft 4 is in a locked state. Here, if the guide plate 11 is rotated clockwise, the rollers 12 loosely fitted in the guide grooves 15 are also in the same direction. To the inner circumferential surface 17 of the winding shaft 4 as a result.
A gap is formed between the roller guide 13 and the outer peripheral surface 16 of the roller guide 13, and the winding shaft 4 can rotate freely. The lock mechanism of the present invention controls the rotation of the take-up shaft 4 by rotating the guide plate 11 so as to bite or remove the roller 12 between the outer peripheral surface 16 and the inner peripheral surface 17. . In the drawing, the clockwise direction of A is a direction in which the curtain 1 and the curtain 2 are unwound and lowered, and the counterclockwise direction of B is a winding direction.

The rotation in the rewinding direction of A is always free, but the winding direction of B is either completely wound or locked to fix the rotation of the winding shaft 4. As described above, the torque that rotates in the winding direction of B is applied to the winding shaft 4 by the coil spring 7 as described above. The rolling member 14 restricts the rotation angle of the guide board 11 to allow or prevent the roller 12 from biting. The rolling member 14 has a through hole 18 formed in only one direction, and the guide board 11 has a fitting piece 19.
9 may be inserted into the through-hole 18 and may not be inserted. This is based on the rotation of the rolling member 14.

If the take-up shaft 4 is rotated in the rewinding direction of A, the guide plate 11 also rotates in the same direction, and the roller 12 fitted in the guide groove 15 of the guide plate 11 moves and winds. A gap is created between the inner peripheral surface 17 of the take-up shaft 4 and the locked state is released. As shown in FIG. 2, the end face 20 of the guide board 11 is in contact with a partition 21 formed on the winding shaft 4, and the coil spring 22 causes friction between the end face 20 of the guide board 11 and the partition 21. Is pressed. Therefore, by turning the winding shaft 4 in the rewinding direction, the guide board 11 can also be rotated in the rewinding direction. Then, with the rotation of the induction board 11, the induction board 1
1 is detached from the through hole 18 of the rolling member 14, and the lever 23 attached to the guide board 11 also moves in the same direction. The rolling member 14 is rotated by contact.

A pressing piece 24 is in contact with one end of the rolling member 14, and the pressing piece 24 provided with the coil spring 25 is in contact with one end of the rolling member 14 so that the rotation angle becomes 90 degrees. One end of the rolling member 14 has a cross-shaped concave groove, and the tip of the pressing piece 24 forms a convex piece that can be fitted into the concave groove. Therefore, the rolling member 14 is 90
Each time it rotates, the convex piece of the pressing piece 24 fits into the groove and is positioned. Therefore, if the rolling member 14 rotates 90 degrees, the direction of the through hole 18 also changes by 90 degrees, and the fitting piece 19 cannot be fitted into the through hole 18.

Then, the handle 3 of the curtain 1 and the curtain 2 again
Is released, the winding shaft 4 rotates in the winding direction of B by the action of the coil spring 7, and the guide plate 1 is rotated with the rotation.
Although 1 also turns in the same direction, the fitting piece 19 cannot be fitted into the through hole 18, and the tip of the fitting piece 19 contacts the side surface of the rolling member 14. In other words, the roller 1
2 cannot be caught between the inner peripheral surface 17 of the winding shaft 4 and the outer peripheral surface 16 of the roller guide 13,
You can't stop the rotation. Therefore, the winding shaft 4
Is rotated to the end, and the curtain 1 and the curtain 2 are wound around the winding shaft 4 and stored.

According to the present invention, the rotation of the guide plate 11 in the winding direction is changed every other time to allow or prevent the engagement of the roller 12. Guide board 11 using piece 19 and lever 23
The means for controlling the rotation angle in the winding direction is a specific example, and is not limited to this embodiment. The present invention configured as described above can obtain the following effects.

[0018]

[Effects of the Invention] In the present invention, as a lock mechanism of a winding shaft for winding a curtain or a curtain, a roller that bites between an inner peripheral surface of the winding shaft and an outer peripheral surface of a roller guide is used, thereby locking the winding shaft. Function becomes very high. That is, once locked, the take-up shaft does not slide and rotate. Also, the rollers are loosely fitted in the guide grooves of the guide board, move with the rotation of the guide board and bite between the inner peripheral surface and the outer peripheral surface,
Although the guide plate may be separated, the guide plate rotates by the frictional force acting between the winding shaft and the winding shaft, so that the curtain and the curtain can be freely rotated only by rotating the winding shaft in the unwinding direction and the winding direction. Can be opened and closed.

[Brief description of the drawings]

FIG. 1 is an external view showing a roll-up type curtain and a curtain.

FIG. 2 is an internal structure of a winding shaft, which is an embodiment of the present invention.

FIG. 3 is a sectional view showing the opening and closing device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 curtain 2 curtain 3 handle 4 take-up shaft 5 bracket 6 fixed shaft 7 coil spring 8 one end 9 other end 10 lock mechanism 11 induction board 12 roller 13 roller guide 14 rolling member 15 guide groove 16 outer peripheral surface 17 inner peripheral surface 18 through hole 19 Insertion piece 20 End face 21 Partition 22 Coil spring 23 Lever 24 Pressing piece 25 Coil spring

Claims (2)

(57) [Scope of request for utility model registration] 1. An opening / closing device having a winding shaft for winding a roll such as a curtain or a curtain, wherein the winding shaft is provided with a coil spring which always applies a spring force in a winding direction.
A roller is interposed between the inner peripheral surface of the hollow take-up shaft and the outer peripheral surface of the roller guide attached to the fixed shaft that supports the take-up shaft, and the roller fits loosely into the guide groove of the guide plate. At the same time, the end face of the guide plate is brought into contact with the partition of the take-up shaft by a spring force, and the magnitude of the rotation angle of the guide plate in the take-up direction is changed every time to take up. An opening / closing device for a scroll, wherein a control device for controlling a rotation angle of a winding direction of an induction board is provided so that the above-mentioned rollers are bitten between an inner peripheral surface of a shaft and an outer peripheral surface of a roller guide every other time. 2. A rolling direction rotation angle control device for the guide board, wherein a rolling member is pivotally supported on the roller guide side, and a through hole is formed in the rolling member in one direction. Provided with a fitting piece that can be fitted, a lever is attached to the guide board, and the rolling member is rotated by 90 degrees by pressing and applying the lever, and as a result, the fitting piece fits into the through hole, 2. The scroll opening / closing device according to claim 1, wherein the rotation angle of the guide board is controlled by not being fitted.