JPH025874B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a shutter provided at a doorway or window.

BACKGROUND ART There are two types of elevating means for a shutter: one that winds up the slat using the biasing force of a spring built into the winding shaft, and the other that winds up the slat by driving the winding shaft to rotate manually or electrically. The shutter, which raises and lowers the take-up shaft by rotating it manually or electrically, has slats that are connected to each other so that they can extend and contract up and down.
A slit is provided that is exposed only when the slat is in an extended state, and by exposing this slit even when the slat is unwound, lighting and ventilation can be achieved.

However, in a shutter that uses the biasing force of a spring to move up and down, it is difficult to precisely control the rotation of the take-up shaft, so the slats are connected in a non-extendable manner and are not provided with slits. Therefore, it was not possible to provide lighting and ventilation with the shutters lowered.

Purpose An object of the present invention is to provide lighting and ventilation even when the slat is unwound in a shutter that moves up and down using the urging force of a take-up spring that rotates the take-up shaft of the slat and the own weight of the slat. To provide the shutter.

Structure of the Invention In order to achieve the above object, the present invention provides a biasing force of a take-up spring that rotates a take-up shaft of a slat;
A shutter that moves up and down using the weight of the slats, in which the slats are connected in a vertically expandable and contractable manner, and a slit is provided in the expandable portion of the slats, and a slit opening/closing means is provided for expanding and contracting the slats to open and close the slits. .

Embodiment Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings.A shutter 1 includes a winding shaft 10 (described later) in which slats 2 connected vertically in multiple stages are rotatably supported in a bracket 3. Suspended and supported, each slat 2 is raised and lowered while being guided by guide rails 4 on both sides. The elevating means is a take-up spring S disposed within the take-up shaft 10,
As with a normal shutter, when opening the shutter, if you lift the slat slightly, the force of the spring will automatically raise it to the fully open state, and when closing, if you pull down the slat 2 slightly, the slat 2 will automatically open due to its own weight. It is something that is lowered.

The slats 2 are connected so that they can expand and contract in the vertical direction,
A large number of slits 5 are provided in the connecting portion in the longitudinal direction of the slat. When each slat 2 is in an extended state, the slit 5 of the connecting portion thereof is exposed. When the shutter 1 is lowered from the open state by applying a downward operating force to the slat 2 using its own weight, the slat 2 is in an extended state as shown in FIG. The lowering is stopped with 5 exposed.

An operation cord 6 is hung from one side of the shutter 1 to close the slit 5 of the shutter 1 which is closed with the slit 5 exposed as shown in FIG. Each slat 2 is further lowered by the slit opening/closing means provided below, and as shown in FIG.
The slits 2 are gradually contracted starting from the lower slats 2, and the slits 5 are closed.

The slit opening/closing means will be explained next.
In the figure, the core shaft 7 is fixed non-rotatably on both sides of the bracket 3, and a pair of take-up pulleys 8 are rotatably supported near both sides, and the outer periphery of the take-up pulleys 8 is connected by a plurality of connecting plates 9. The winding shaft 10 is thus formed.

A take-up spring S is disposed inside the take-up shaft 10 as means for raising and lowering the shutter.
This take-up spring S has one end fixed to the core shaft 7, and the other end fixed to the take-up pulley 8.
When the winding shaft 10 is rotated in the slat downward direction, the relative rotation between the core shaft 7 and the winding pulley 8 stores energy. When the shutter 1 is closed with the slits 5 of each slat 2 exposed as shown in FIG. This state is maintained by balancing the weight of the slat 2 suspended from the winding shaft 10.

A drive pulley 11 around which the operating cord 6 is wound is rotatably supported on one end of the core shaft 7 via a bearing. The drive pulley 1
1 has its central portion protruding toward the inside of the bracket 3, and teeth are carved on its outer peripheral surface to form a sun gear 12. A planetary gear 14, which is rotatably supported by a planetary carrier 13, is meshed around the sun gear 12, as shown in FIG. At the center of the planetary carrier 13, a mounting cylinder 15 projects toward the inside of the bracket 3, and the mounting cylinder 15 and the take-up pulley 8 are connected and fixed by a connecting cylinder 16. Therefore, the winding shaft 10 and the planetary carrier 13 are rotated together.

The internal gear 17 formed in a cylindrical shape has teeth 17a carved on its inner peripheral surface meshing with the planetary gear 14, and external teeth 19 on the outer periphery of a flange portion 18 provided at the end on the drive pulley 11 side. is provided.

The drive pulley 11 and the flange portion 18 of the internal gear 17 are covered with an operation case 20 and a pulley stopper 21 shown in FIG. The operation case 20 is fixed to the bracket 3, and the pulley stopper 21 has a shape obtained by cutting off 1/4 of the operation case 20, and its upper end is connected to the operation case 2 by a shaft 22.
0, and is normally biased by a spring (not shown) to a position where it is removed from the operation case 20.

The operation case 20 is a flange portion 18 of the internal gear 17.
The center portion of the pulley stopper 21 is slightly protruded to cover the flange portion 18, and internal teeth 23 that mesh with the external teeth 19 of the flange portion 18 are provided on the inner peripheral surface of the protruding portion of the pulley stopper 21. Note that since the operation case 20 and the pulley stopper 21 are always in a separated state due to the biasing force of the spring, the external teeth 19 of the flange portion 18
The inner teeth 23 of the pulley stopper 21 do not mesh with each other. Further, a roller 2 for supporting the operation cord 6 is provided on the outer periphery of the pulley stopper 21.
4 is rotatably supported.

The operation cord 6 has its upper end wrapped around a drive pulley 11, and is guided from the drive pulley 11 to the outside of the operation case 20 via the roller 24 of the pulley stopper 21, and is guided to the outside of the operation case 20 by a guide roller provided inside and below the bracket 3. 25 and a stopper 26 provided on the lower surface of the bracket 3, and is suspended below the bracket 3. When the operating cord 6 hanging from the bracket 3 is pulled downward, the operating cord 6 is tensioned between the guide roller 25 and the drive pulley 11, and the pulley stopper 21 is operated against the urging force of the spring. The internal teeth 23 of the case 20 are pressed against the external teeth 1 of the internal gear 17.
At the same time as the drive pulley 11 is engaged with the drive pulley 9, the drive pulley 11 is rotated.

The stopper 26 is automatically deactivated when the operating cord 6 is pulled downward, and when the operating cord 6 is about to be hoisted upward by the pulling force from the drive pulley 11 side, the stopper 26 is automatically deactivated. It is designed to prevent movement.

Next, the operation of the shutter 1 configured as described above will be explained.

Now, when closing the shutter 1 from the fully open state, by pulling the lower edge of the shutter 1 downward, the winding shaft 10 is rotated by the weight of the slat 2, and the slat 2 is lowered. At this time, the winding spring S within the winding shaft 10 is gradually charged. And the first
As shown in the figure, when each slat 2 is connected in a state where it is stretched by its own weight and the lowest slat 2 reaches the ground surface, the weight of each slat 2 acting on the winding shaft 10 is The rotational torque and the rotational torque due to the biasing force of the take-up spring S are in equilibrium and this state is maintained.

During the slat lowering operation as described above, the operation cord 6 is not operated and the pulley stopper 21 is separated from the operation case 20 due to the biasing force of the spring, so that the internal gear 17 can rotate relative to the operation case 20. Become. Therefore, when the slat 2 is lowered, the rotation of the take-up shaft 10 causes the planetary carrier 1 to
The drive pulley 11 is not rotated because the planetary gear 14 supported by the drive pulley 11 rotates around the sun gear 12 of the drive pulley 11 while rotating the internal gear 17.

The shutter 1, which has been unwound to the state shown in FIG. 1, can be illuminated and ventilated through the slit 5. From this state, pull the operating cord 6 downward to close the slit 5 and make it fully closed.
When the pulley stopper 21 is moved toward the operation case 20 and its internal teeth 23 mesh with the external teeth 19 of the internal gear flange portion 18, the drive pulley 11 is rotated. Pulley stopper 21 is internal gear 17
When engaged, the internal gear 17 becomes unable to rotate. When the drive pulley 11 is rotated in this state, the planet gear 14 is rotated by the internal gear 17 as the sun gear 12 rotates.
The planetary carrier 13 is rotated in the same direction as the drive pulley 11 at a reduced speed, and the take-up shaft 10 is rotated in the downward direction of the slat 2. Therefore, the operation code 6 causes the drive pulley 1 to
1 is increased by the planetary gear 14 and transmitted to the winding shaft 10.

When the winding shaft 10 is rotated in the downward direction of the slats 2, the lower slats 2 gradually contract as shown in FIG. 2, and the slits 5 are closed, eventually becoming fully closed.

When the operating cord 6 is released in the fully closed state or with the slit 5 closed to the desired position, the take-up spring S is slightly rotated in the downward direction of the slat 2 from the equilibrium state shown in FIG. Due to the biasing force, a rotational torque acts on the winding shaft 10 in the direction in which the slat 2 is wound up, but rotation of the winding shaft 10 in the same direction is prevented by a stopper 26 that operates with respect to the operating cord 6. At this time, the winding shaft 1
Since the rotational torque acting on the stopper 26 is reduced by the planetary gear 14 and transmitted to the drive pulley 11, the stopper 26 can have a simple structure.

When opening the fully closed shutter 1, first pull the operating cord 6 to release the stopper 26, and the slat 2 will be slightly wound up by the urging force of the winding spring S, as shown in Fig. 1. state, the pulley stopper 21 separates from the operation case 20 and the pulley stopper 21 and internal gear 1
7 is disengaged. When the slat 2 is lifted slightly upward in this state, the rotational torque of the take-up shaft 10 due to the urging force of the take-up spring S exceeds the weight of the slat 2, and the slat 2 is wound up until the shutter 1 is fully opened. At this time, since the internal gear 17 is out of mesh with the pulley stopper 21, it can rotate with the planetary gear 14 rotating around the sun gear 12. The drive pulley 11 with the sun gear 12 is therefore not rotated.

As described above, this shutter 1 can be easily opened and closed using the urging force of the take-up spring S and the weight of the slat 2 in the same manner as conventional shutters. Then, when the slat 2 is pulled down from the fully open state and lowered by its own weight against the urging force of the take-up spring S, due to the balance between the weight of the slat 2 and the urging force of the take-up spring S,
As shown in FIG. 1, the lowering is stopped with the slits 5 provided in each slat 2 exposed, and in this state, lighting and ventilation can be performed with the slats 2 being unwound.

Furthermore, by operating the operation code 6, the slit 5
can be opened and closed arbitrarily.

Effects As detailed above, the present invention is capable of unwinding and unwinding the slat 2 in the shutter 1 which moves up and down using the urging force of the take-up spring S that rotates the take-up shaft of the slat 2 and the weight of the slat 2. Even in the closed state, the slit 5 can be opened and closed by the slit opening/closing means to provide light and ventilation, which provides an excellent effect.

[Brief explanation of drawings]

Fig. 1 is a front view showing the slit of the shutter in a fully open state, Fig. 2 is a front view showing the slit in a half-open state, Fig. 3 is a sectional view of the slit opening/closing means, and Fig. 4 is a front view of the slit opening/closing means. Side view,
FIG. 5 is a front view thereof, and FIG. 6 is a perspective view of the operation case and pulley stopper. Shutter...1, Slut...2, Slit...5, Operation code...6, Take-up shaft...10, Drive pulley...11, Sun gear...12, Planetary carrier...13, Planetary gear... 14. Internal gear...
17. Operation case...20. Pulley stopper...
...21, Winding spring...S.

Claims (1)

[Claims] 1. In a shutter that moves up and down using the biasing force of a take-up spring that rotates the take-up shaft of the slat and the weight of the slat, the slat 2 is connected so as to be able to extend and contract up and down, and the slit 5 is provided in the part that can be extended and contracted. A shutter characterized in that it is provided with a slit opening/closing means for expanding and contracting the slat 2 to open and close the slit 5.