JPS62141285A - Switching driving device for window - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for remotely opening and closing high windows, such as smoke exhaust windows, located at high places in buildings, factories, and the like.

Problems to be Solved by the Prior Art and the Invention Devices for opening and closing windows installed at high places in buildings, such as smoke exhaust windows, are designed to One end of the wire is connected, the other end is connected to a drum installed at the bottom of the building, and a reversible motor connected to the drum is driven in the normal direction to rotate the drum in the normal direction, thereby winding the wire and closing the window. There is a known device in which a reversible motor is reversed to reverse the drum, thereby feeding out a wire and opening the window using a biasing force. If for some reason it becomes impossible to open the window board or the window opening speed drops and the wire payout speed becomes faster than the window board opening speed, the wire will be paid out more than necessary and become slack, and the drum will be stored. The same problem may occur if the cable becomes entangled in the operation box, or if the cable comes off the pulley during the wiring, or if the drum continues to rotate due to inertia after the window board opening is completed. There was a problem where the wire was unwound due to excess wire being fed out.

Means for Solving the Problems In order to solve the above-mentioned problems, the window opening/closing operation device of the present invention winds up a wire connected to a window plate biased in the window opening direction by normal rotation, and closes the window plate. A rotating shaft that rotates in forward and reverse directions in conjunction with the drum is connected to a drum that is driven in the direction of closing the window against bias, and a worm wheel is fitted around the outer periphery of the rotating shaft to connect the worm wheel and the rotating shaft. A clutch is interposed between the shafts so that the worm wheel cannot rotate relative to the rotating shaft in one direction and can rotate relatively freely in the opposite direction, and the worm wheel is connected to the output shaft of the reversible motor. When the reversible motor rotates forward, the worm wheel rotates integrally with the rotating shaft, and the drum rotates forward, and when the reversible motor reverses, the window plate is biased to rotate the worm wheel. The rotating shaft rotates in the same direction as the worm wheel at a speed equal to or less than the same speed, so that the drum rotates in reverse.

Functions and Effects The present invention has the above configuration, and when the reversible motor is reversed to drive the worm wheel to open the window plate, there is a gap between the worm wheel and the rotating shaft that rotates in conjunction with the drum. Due to the action of the interposed clutch, the rotating shaft is rotated in the same direction by the urging force of the window plate by the maximum amount of rotation of the worm wheel, and the wire is paid out from the drum. If the worm wheel stops or the fenestration speed decreases and the worm wheel speed becomes faster than the rotating shaft, the worm wheel simply spins idly and does not forcibly rotate the rotating shaft. There is an effect that the wire is not drawn out more than necessary, and the occurrence of slack in the wire can be reliably prevented.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

In the figure, 1 is a box that is attached to the lower part of a building, and is a substantially rectangular parallelepiped in which a mounting body 4.5 is inserted between both ends of an upper plate 2 and a lower plate 3, and they are joined together. At the center of one side of the box body 1 in the width direction, a rotating shaft 7 is fitted at its upper and lower ends into mounting holes 8 and 9 of the upper plate 2 and lower plate 3 via bearings 8a and 9a. A drum 11 is rotatably fixed to the upper end of the rotating shaft 7, and the other end of the wire 12, which has one end fixed to the drum 11, is placed at a high place in the building. Due to the spring elasticity of the smoke exhaust window, the swinging force in the direction of opening the window is connected to the biased window plate, and as the drum 11 rotates clockwise in FIG. 2, the wire 12 is wound up and the window plate becomes a biasing force. Close the window against the
By rotating the drum 11 in the counterclockwise direction, the wire 12 is fed out and the window plate is opened by an urging force.

A worm wheel 15 is fitted below the drum 11 of the rotating shaft 7 through a roller clutch 20, and the roller clutch 20 is connected to a center hole of the worm wheel 15 as shown in FIG. cylindrical body 21 fitted into
In the annular groove 27 between the inner peripheral surface of the rotating shaft 7 and the outer peripheral surface of the rotating shaft 7,
Four partition rods 23 are arranged in a circle at 90 degree intervals, and a holder 22 is fitted in which the inner peripheries of the upper and lower ends of each partition rod 23 are connected by rings 24, and the four partition rods 23 are arranged between each partition rod 23. Each roller 25 is rotatably fitted, and the inner surfaces of the upper and lower ends of each roller 25 are shaved off by the circumference of the cow, and the ring 24 is inscribed in the raised end surface, so that each roller 25 has a fixed shape. The outer peripheral surface of each roller 25 is rotatable within an angular range.

Approximately a semicircular portion of the inner side is a circular arc-shaped surface 28 with a constant radius, and a flat surface 29 is formed by cutting the outer circumferential surface in the following approximately 1/4 circumference, and this flat surface 29 and the circular arc-shaped surface 28 are They are connected by a connecting curved surface 30 whose radius gradually increases, and this connecting curved surface 30
The diameter connecting the center point a and the corresponding point A across the center is equal to the width of the groove 27, and the diameter gradually increases in the counterclockwise direction, and gradually decreases in the clockwise direction. When the worm wheel 15 rotates clockwise in FIG. Since a portion having a diameter larger than the width of the groove 27 of the roller 25 corresponds between the circumferential surface and the outer circumferential surface of the rotating shaft 7, each roller 25 is sandwiched between the cylindrical body 21 and the rotating shaft 7. In this state, the worm wheel 15 is connected to the rotation axis 7.
When the worm wheel 15 rotates counterclockwise, the rollers 25 become relatively unrotatable.
The worm wheel 15 rotates counterclockwise, and a portion of the roller 25 whose diameter is smaller than the width of 11427 corresponds between the inner circumferential surface of the cylinder 21 and the outer circumferential surface of the rotating shaft 7. It is designed to be able to rotate freely relative to the rotating shaft 7.

On the side of the worm wheel 15 inside the box 1 described above,
The drive shaft 31 is spanned between the mounting bodies 4.5 and is rotatably supported by bearings 32, 33 and 34, and a worm 35 formed on the drive shaft 31 is engaged with the worm wheel 15, and this drive Mounting body 4 of shaft 31
A gear 36 formed at the end protruding inward is meshed with a screw gear 37 pivotally supported within the mounting body 4, and this screw gear 37 is connected to an output shaft 40 of a reversible motor 39 mounted on the mounting body 4. It is interlocked.

Further, a gear 42 for generating a rotation signal is fixed to the lower end of the rotation shaft 7 so as to be integrally rotatable.
A limit switch 4 that engages with this gear 42 is provided on the lower plate 3.
A rotation stop detection device 43 having a rotation stop detection device 43 is attached, and this detection device 43 is activated at the same time as the reversible motor 39 is started, and the gear 42 rotates and the limit switch 44 is activated.
(!-The reversible motor 39 continues to be driven while the pulse signal is generated by alternately turning ON and OFF, and the gear 4
When the rotation of the reversible motor 39 stops and the pulse signal disappears, a signal is sent to stop the reversible motor 39 after a certain period of time has elapsed.

Further, a hexagonal hole 48 is bored in the upper end surface of the rotating shaft 7 and fits into a hexagonal bar 47 protruding from the mounting portion of the operating handle 46 .

Next, the operation of this embodiment will be explained.

When closing the window plate, when the reversible motor 39 is rotated in the forward direction, the worm wheel 15 rotates clockwise in FIGS. 2 and 3 via the worm 35 of the drive shaft 31. When rotating clockwise, the worm wheel 15 and the rotating shaft 7 are relatively unrotatable due to the action of the roller clutch 2o, so that
The rotating shaft 7 rotates together with the worm wheel 15 in the same direction, the drum 11 fixed to the rotating shaft 7 also rotates clockwise, and the wire 12 is wound around the drum 11 against the force. When the window closing is completed and the rotating shaft 7 stops rotating, the reversible motor 39 is stopped by a signal from the detection device 43, and at this time, the rotating shaft 7 stops rotating.
tries to rotate counterclockwise due to the biasing force, but due to the action of the roller clutch 20, it becomes one with the worm wheel 15, and this worm wheel 15 is locked unrotatably due to engagement with the worm 35, so that one rotation axis 7 The counterclockwise rotation of the drum 11 is then prevented, and the window plate is maintained in a closed state.

When opening a window plate, when the reversible motor 39 is reversed, the worm wheel 15 rotates counterclockwise, and when the worm wheel 15 rotates counterclockwise,
The worm wheel 15 is activated by the action of the roller clutch 20.
Since the worm wheel 15 is attached to the rotating shaft 7 and is relatively free to rotate, the worm wheel 15 idles and the worm wheel 15
The rotating shaft 7 rotates in the same direction by the force of the drum 11, following the rotation of the wire 12, and the wire 12 is drawn out from the drum 11 to open the window. When the fenestration of the plate becomes impossible or the fenestration speed decreases and the speed of the worm wheel 15 becomes faster than the speed of the rotating shaft 7, the worm wheel 15 idles without forcibly rotating the rotating shaft 7. When the window closing stops, the wire 12 stops being fed out, and when the window closing speed decreases, the wire 12 is fed out in accordance with that speed, so that the wire 12 is not fed out more than necessary. Further, when the fenestration is completed and the rotating shaft 7 stops, a signal from the detection device 43 causes the reversible motor 39 to stop.
Even if the worm wheel 15 continues to rotate for a while due to time lag and inertia when the wire stops, the worm wheel 15 merely rotates idly in the same way, and the wire 12 is not unwound.

Note that when the rotating shaft 7 is rotated clockwise in FIG. 3, the action of the roller clutch 200 is the same as when the worm wheel 15 is rotationally driven in the counterclockwise direction. 15 can be relatively rotated freely. Therefore, by attaching the operation handle 46 to the rotating shaft 7 and manually rotating it clockwise, the wire 12 can be wound around the drum 11 while the rotating shaft 7 is idling.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partially cutaway plan view thereof, and FIG. 3 is a partially cutaway enlarged plan view showing details of the structure of the roller clutch. 7: Rotating shaft 11 Ni drum 12: Wire 15: Worm wheel 20: Roller clutch 31: Drive shaft 3
5: Worm 39: Reversible motor 40: Output shaft output Chuo Spring Co., Ltd.

Claims (1)

[Claims] A rotating shaft that rotates in forward and reverse directions in conjunction with the drum is attached to a drum that winds up a wire connected to a window plate biased in the window opening direction in a normal rotation and drives the window plate in the window closing direction against the bias. and a worm wheel is fitted around the outer periphery of the rotating shaft so that the worm wheel is relatively unrotatable in one direction with respect to the rotating shaft and in the opposite direction. A clutch is interposed to allow relative rotation freedom, the worm wheel is engaged with a worm connected to an output shaft of a reversible motor, and the worm wheel is rotated integrally with the rotating shaft by normal rotation of the reversible motor. When the reversible motor rotates in the reverse direction, the rotating shaft rotates in the same direction as the worm wheel at a speed equal to or less than the same speed as the worm wheel, and the drum rotates in the reverse direction. A window opening/closing operation device characterized by