JPH0716679U - Scroll opener - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In a device for opening and closing a scroll that winds and rewinds on a winding shaft, the scroll can be stably stopped at a predetermined height, and the opening and closing operations can be performed. Providing a simple and automatic rewinding device. An opening / closing device is provided with a coil spring 7 which constantly applies a spring force to a winding shaft 4 in a winding direction, and a roller guide which is attached to an inner peripheral surface of the winding shaft and a fixed shaft 6. A roller is interposed between the outer peripheral surfaces, and the roller is loosely fitted in the guide groove of the guide board, and the size of the rotation angle of the guide board in the winding direction is changed each time, and the inner peripheral surface of the winding shaft is changed. So that the rollers are caught between the outer peripheral surface of the roller and the roller guide every other time.
Install a control device for the rotation angle of the induction board.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for opening and closing a scroll (for example, a curtain). Not only curtains but also curtains made by weaving thin bamboo etc. are included in the target scrolls, but the scrolls are structured so that they can be opened and closed by being wound and unwound around the shaft.

[0002]

[Prior art]

 The curtain partially blocks the incidence of light from the outside and also has the effect of keeping the room warm and soundproof, but it also has the effect of decorating the room. There are many types of curtains, and broadly speaking, there are curtains that open and close by sliding along rails along the rails on the windows, and curtains that open and close by sliding vertically. There is. The curtain to which the present invention is directed is a type of curtain which is provided with a rotating shaft on the crosspiece of the window, and functions to wind and unwind the curtain around the shaft to open and close.

As a curtain opening and closing device of this type, there is known a "winding type electric curtain device" according to Japanese Patent Application Laid-Open No. 1-293809. The device uses a motor as opening and closing means, and the motor is a winding pipe. It is housed in and rotates the take-up pipe via a gear. Therefore, by pressing the switch, the winding shaft can be rotated and the curtain can be opened and closed, but the opening and closing movement is slow, and there is a problem in terms of cost such as wiring work for powering the motor. Therefore, instead of the motor, a coil spring is used, the coil spring is housed in the winding shaft, and when the curtain is pulled down, it is pulled by hand, and at that time, the coil spring is twisted as the winding shaft rotates and the curtain is pulled. Some types utilize the return torque of a twisted coil spring when raising.

If the motor rotates the take-up shaft, it is possible to stop the curtain at a predetermined height by operating the clutch at the same time as stopping the motor. On the take-up shaft, the rotation lock mechanism of the take-up shaft is not stable, so that the stationary position of the curtain is not correctly determined. This is the reason why this type of curtain is not so popular. Further, since the curtain is a thin cloth made of cloth, it is not possible to wind up a scroll such as a blind made by knitting a thin bamboo material or a rod material. Of course, it is possible to stabilize the stationary position of the blind. Can not.

[0005]

[Problems to be solved by the present invention]

 As described above, the conventional winding curtain opening / closing device has the above-mentioned problems. The problems to be solved by the present invention are these problems, and it is possible to stop accurately at a desired position without using a motor, and to wind not only a cross curtain but also a blind. Provide a switchgear.

[0006]

[Means for Solving the Problems]

 The scroll according to the present invention can be any type of scroll that can be stored by winding it, such as a conventional curtain, a blind, and a curtain. For this reason, the opening / closing device for the scroll has a structure such that even a scroll-like material can be wound up. Basically, it has a structure in which a winding material is wound around a winding shaft, and the winding shaft is a hollow tube and is rotatably supported by a fixed shaft inserted in 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 it is interposed and the winding shaft rotates.

Then, a winding material such as a curtain is wound around the winding shaft, and if the end of the winding material is manually pulled, the wound winding material is rewound, and if a hand is released, a lock mechanism operates and at that position. Stop. The winding shaft is rotated by pulling the scroll, and the coil spring is twisted together with the rotation. Therefore, the scroll is wound around the winding shaft by utilizing the torsion torque, but the lock mechanism is released by pulling the scroll once.

The feature of the present invention resides in this locking mechanism, and the reverse rotation of the winding shaft (rotation in the winding direction) is allowed in every forward rotation, and after the first forward rotation, It is locked, and after the next normal rotation, the lock is released and it reversely rotates to wind the scroll. The lock mechanism is composed of a roller that contacts the inner peripheral surface of the winding shaft, a roller guide, a guide board, and a winding angle control device for the guide board. The guide board holds the above-mentioned rollers, and the outer circumference of the roller guide has a smooth curved surface to change the distance between the inner circumference of the winding shaft and the rollers interposed between the outer circumference of the roller guide. And the inner surface of the winding shaft. Then, the rotation of the winding shaft is restricted, but the rollers may or may not be caught depending on the size of the rotation angle in the winding direction of the induction board. The rotation angle control device controls the size of the rotation angle in the winding direction. Embodiments according to the present invention will be described below in detail with reference to the drawings.

[0009]

【Example】

 FIG. 1a shows a roll-up curtain and FIG. 1b shows a roll-up curtain. The screen 1 and the curtain 2 are wound around the winding shaft and stored, and the screen 1 and the curtain 2 are lowered by pulling the handle 3 when necessary. Then, the curtain 1 and the curtain 2 which have been lowered to the required height are stopped at that position without being raised by releasing the handle 3. That is, a lock mechanism described later operates. When the blind 1 and the curtain 2 that have been pulled down are rolled up, the locking mechanism is released by slightly pulling the blind 1 and the curtain 2 downward again, and if the handle 3 is released, the blind 1 and the curtain 2 are released. 2 rises and is wound around the winding shaft.

FIG. 2 shows an embodiment showing the inside of the winding shaft 4. The winding shaft 4 has a hollow inside, and is supported by a fixed shaft 6 attached to a bracket 5 so that it 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 side, and the other end 9 is fixed to the winding shaft 4 side. 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 to restrict the rotation of the winding shaft 4.

As shown in the enlarged sectional view of FIG. 3, the lock mechanism 10 has a guide board 11, rollers 12, a core guide 13, and a rolling member 14, and the winding shaft 4 to be rotated is referred to as the core guide 13. The rollers 12 and 12 are bitten in between and locked. The roller 12 may have a rotatable shape, but in general, a thin cylindrical body is used, and the roller 12 is loosely fitted in the guide groove 15 formed in the guide board 11. The outer peripheral surface 16 of the roller guide 13 forms a smooth curved surface, and the interval between the outer peripheral surface 16 and the inner peripheral surface 17 of the winding shaft 4 is not constant but has changed.

FIG. 3 shows the case where the winding shaft 4 is in the locked state, but if the guide board 11 is rotated clockwise here, the roller 12 loosely fitted in the guide groove 15 is also the same. By moving in the direction, as a result, a gap is created between the inner peripheral surface 17 of the winding shaft 4 and the outer peripheral surface 16 of the roller guide 13, and the winding shaft 4 can freely rotate. The lock mechanism of the present invention controls the rotation of the winding shaft 4 by rotating the guide board 11 so that the roller 12 is caught between the outer peripheral surface 16 and the inner peripheral surface 17 or removed. To do. In the figure, the clockwise direction of A is the direction in which the blind 1 and the curtain 2 are unwound and lowered, and conversely, the counterclockwise direction of B is in the winding direction.

The rotation of A in the rewinding direction is always free, but the winding direction of B may be completely wound up or may be locked to fix the rotation of the winding shaft 4. As described above, the coil spring 7 constantly applies a torque that rotates in the winding direction of B to the winding shaft 4. The rolling member 14 restricts the rotation angle of the guide board 11 to allow or prevent the rollers 12 from being caught. The rolling member 14 has a through hole 18 formed only in one direction, and the guide board 11 has a fitting piece 19, which may or may not fit into the through hole 18. This is based on the rotation of the rolling member 14.

Now, if the winding shaft 4 is rotated in the unwinding direction of A, the guide board 11 will also rotate in the same direction and the locked state will be released. This is because 20 is in contact with the partition 21 formed on the winding shaft 4, and the coil spring 22 presses the end surface 20 so as to generate friction with the partition 21. When the guide board 11 rotates in the rewinding direction, the fitting piece 19 is removed 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, so that the lever 23 moves. The tip of the roller contacts the rolling member 14 to rotate the rolling member 14.

A pressing piece 24 is in contact with one end of the rolling member 14, and a pressing piece 24 having a coil spring 25 is in contact with one end of the rolling member 14 so that the rotation angles thereof are 90 degrees. The rolling member 14 has a concave groove in the shape of a cross at one end, and the tip of the pressing piece 24 forms a convex piece that can be fitted into the concave groove. Therefore, every time the rolling member 14 rotates 90 degrees, the convex piece of the pressing piece 24 fits into the concave groove and is positioned. Therefore, if the rolling member 14 rotates 90 degrees, the direction of the through hole 18 also changes its direction by 90 degrees, and the fitting piece 19 cannot be fitted into the through hole 18.

Therefore, if the handle 3 of the blind 1 and the curtain 2 is released again, the winding shaft 4 is rotated in the winding direction B by the action of the coil spring 7, and the induction plate 11 is also rotated in the same direction as the rotation. However, the fitting piece 19 cannot be fitted into the through hole 18, and the tip thereof abuts the side surface of the rolling member 14. That is, since the roller 12 does not rotate sufficiently, the roller 12 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, and prevents the rotation of the winding shaft 4. I can't do that. Therefore, the winding shaft 4 rotates to the end, and the screen 1 and the curtain 2 are wound around the winding shaft 4 and stored.

In the present invention, the rotation of the guide board 11 in the winding direction is changed every other time to allow or prevent the biting of the roller 12, but the rolling member 14 The rotation angle control means for winding the guide board 11 in the winding direction using the piece 19 and the lever 23 is one specific example, and is not limited to this embodiment. The present invention thus constructed can obtain the following effects.

[0018]

[Effect of device]

 In the present invention, as the lock mechanism of the winding shaft around which the cord or curtain is wound, a roller that is caught between the inner peripheral surface of the winding shaft and the outer peripheral surface of the roller guide is used, so that the locking function of the winding shaft is very high. Become. That is, once locked, the winding shaft does not rotate. Also, the roller is loosely fitted in the guide groove of the guide board and moves along with the rotation of the guide board to be caught or disengaged between the inner peripheral surface and the outer peripheral surface. Since it rotates due to the frictional force acting between them, it is possible to freely open and close the blind and the curtain only by rotating the winding shaft in the rewinding direction and the winding direction.

[Brief description of drawings]

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

FIG. 2 is an internal structure of a winding shaft according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an opening / closing device of the present invention.

[Explanation of symbols]

 1 curtain 2 curtain 3 handle 4 winding shaft 5 bracket 6 fixed shaft 7 coil spring 8 one end 9 the other end 10 locking mechanism 11 guide plate 12 roller 13 roller guide 14 rolling member 15 guide groove 16 outer peripheral surface 17 inner peripheral surface 18 through hole 19 Fitting piece 20 End face 21 Partition 22 Coil spring 23 Lever 24 Pressing piece 25 Coil spring

Claims (2)

[Scope of utility model registration request] 1. An opening / closing device comprising a winding shaft around which a wound material such as a screen and a curtain is wound, and the winding shaft is provided with a coil spring for constantly acting a spring force in a winding direction,
A roller is interposed between an inner peripheral surface of the hollow winding shaft and an outer peripheral surface of a roller guide attached to a fixed shaft that supports the winding shaft, and the roller is in frictional contact with the winding shaft. It is constrained by a guide board that rotates within the allowable range, and the size of the rotation angle of the guide board in the winding direction is changed at each time, and An opening / closing device for a scroll, which is provided with a rotation angle control device for the winding direction of the induction board so that the rollers bite every other time. 2. A winding member rotation angle control device for the induction board, wherein a rolling member is pivotally supported on the roller guide side, a through hole is formed in the rolling member in one direction, and the induction board is provided with a through hole. A fitting piece that can be fitted is provided, and a lever is attached to the guide board, and the rolling member is rotated by 90 degrees by pressing and pressing the lever, and as a result, the fitting piece fits into the through hole, The device for opening and closing a scroll according to claim 1, wherein the rotation angle of the guide board is controlled by not inserting the guide plate.