JPH0549986U - Skylight switchgear - Google Patents

Abstract

(57) [Summary] [Structure] The winding drum 12 is moved to the position shown in FIG.
The skylight is opened by rotating in the direction of the arrow in (A). After the window has reached the maximum opening as shown in FIG. 2 (B), when the wire 6 is tensioned as shown in FIG. 2 (C) and begins to be wound around the winding drum 12 again, the stay urging force is increased. Therefore, the winding drum 12 is prevented from rotating. For this reason,
As the load on the motor 25 increases, the value of the electric current that is energized increases significantly, and when this is detected by a control circuit (not shown), the energization of the motor 25 is cut off. [Effect] Since the electrical means is used as a method for detecting that the skylight is fully opened, the conventional difficult work of adjusting the spring force is unnecessary.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, the wire wound between the window frame and the shoji is wound on a take-up drum that is rotated by the drive of a motor, so that the shoji is moved in a closed window against the urging force in the opening direction. In addition, the present invention relates to a skylight opening / closing device in which a shoji is moved by opening the wire from the winding drum according to the bias in the window opening direction while energizing the motor with a weak current.

[0002]

[Prior Art]

 In such a skylight opening / closing device as described above, when the shoji screen reaches the position where the opening is at the maximum opening and the rotation of the winding drum is stopped during the opening of the window, the motor continues to be energized with a weak current. Since an overload will act on and the excessive current will continue to flow, measures will be taken to automatically cut off the power supply to the motor when the skylight is fully opened.

As one example thereof, conventionally, a wire is hung on a pulley that exerts a spring force in a direction substantially perpendicular to the wiring direction, and the wire is always tensioned by a bias in the fenestration direction that always acts on the shoji. The pulley holds the spring in a position where the spring is elastically contracted, and detects the approach of the wire when the wire whose tension is released is pushed through the pulley by the spring force in the vicinity of the pulley. In this structure, a limit switch that outputs a signal to stop the motor drive is provided, and the wire is strained because the shoji reaches the maximum opening position and is blocked from moving toward the window. When released, a signal was output from the limit switch that detected that wire to stop the motor drive.

[0004]

[Problems to be solved by the device]

 However, in the conventional device using such means, it is necessary to adjust the magnitude of the spring force acting on the pulley in order to make the limit switch operate accurately. There is a problem that it is difficult to set the height to an appropriate value for the tension of the wire.

[0005]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention provides a winding end between a window frame and a shoji supported by the window frame that can be freely opened and closed and is biased in the window opening direction. The wire secured to the winding drum is hung over, and the winding drum is supplied with an electric current of a magnitude large enough to rotate the winding drum against the bias in the window opening direction when the window is closed. At times, a motor to which a weak current is applied is connected, and the motor is connected to a control circuit that shuts off the current to the motor when the value of the current flowing through the motor during a window opening operation exceeds a specified value. ..

[0006]

[Operation and effect of the device]

 The present invention has the above-described structure, and when the window is opened, the wire is unwound from the winding drum while the motor is supplied with a weak current, and the shoji urges the wire to swing in the window opening direction. During this time, the motor rotates with the winding drum. For this reason, the load acting on the motor is relatively small, and the value of the flowing current remains weak.

After the shoji reaches the position of the maximum opening, the winding drum tries to rewind the wire once unwound over the entire length, so that the load acting on the motor increases, and The current flowing through the switch has a large value exceeding a predetermined value, whereby the control circuit is actuated and the energization to the motor is cut off.

As described in the above operation, the skylight opening / closing device of the present invention is based on the value of the current flowing through the motor, which indicates that the shoji has reached the maximum open position and the skylight is in the fully open state. Since it is detected by electrical means, the spring force is set to an appropriate value as in the conventional device that uses the method of mechanically detecting the balance between the wire tension and the spring force. This has the effect of avoiding the difficult work of doing.

[0009]

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. On one side 1a of the window frame 1 provided on the rooftop of the building, a shoji 3 that opens and closes the opening 2 of the window frame 1 is free to swing upward with the one side 3a as a fulcrum, and the spring force and It is supported in a state of being biased toward the window opening by a stay 4 having an extension force due to gas pressure or the like. The shoji 3 is prevented from swinging in the window opening direction by the stay 4 extending to the maximum length, and the opening of the window is maximized in this state.

Between the window frame 1 and the shoji 3, a wire 6 having a feeding end fixed to a bracket 5 at one end of the other side 1 b parallel to the one side 3 a of the window frame 1 is connected to the one side 3 a of the shoji 3. The pulley 7a supported at one end of the parallel other side 3b, the pulley 7b supported at the other end of the other side 3b, and the pulley 7c supported at the other end of the other side 1b of the window frame 1 are distributed in that order. Is being searched. The winding end of the wire 6 is connected to a winding drum 12 in an operation box 10 fixed at a relatively low position on the wall surface.

The winding drum 12 has a flange portion 15 formed at one end of a drum body 13 whose outer circumference is a circumferential winding surface 14 for winding the wire 6, and is concentric with the other end of the drum body 13. The spur gear 16 has a structure in which it is fixed in a brim shape, and is rotatably supported by a shaft (not shown).

A guide groove 17 is formed at one end of the winding surface 14 of the drum body 13 and has a width substantially equal to the outer diameter of the wire 6 and opens to the hollow side over a certain range in the circumferential direction. ing. The guide groove 17 is formed with a pair of guide surfaces 18, 18 which are smoothly connected to the winding surface 14 at both ends thereof and which are curved with a curvature larger than that of the winding surface 14 and reach the hollow side.

In the operation box 10, the wire 6 is routed so as to come into contact with the turning roller 19 supported near the winding drum 12, and from the winding surface 14 side of the winding drum 12. The winding end of the wire 6 which is passed through the guide groove 17 to the hollow side is sandwiched between the two large and small sandwiching plates 21 and 22 fixed to the periphery of the opening of the winding drum 12 toward the hollow one end. It is fixed by this.

The pay-out length of the wire 6 whose winding end is fixed to the winding drum 12 is such that the skylight is opened to the maximum opening and the shoji 3 is prevented from swinging in the window opening direction. By the way, as shown in FIG. 2B, the wire 6 is dimensioned so that it can be completely paid out over its entire length.

A motor 25 meshes with the operation box 10 so that its output shaft, not shown, rotates integrally with the spur gear 16 of the winding drum 12 via a gear, not shown, housed in a gear box 26. It is installed in a combined state.

The motor 25 is a drive that can rotate the winding drum 12 in the winding direction of the wire 6 against the bias of the stay 4 by supplying a sufficiently large current when the window is closed. In addition to outputting a force, when the winding drum 12 rotates in the direction in which the wire 6 is fed out according to the bias of the stay 4 when the window is opened, a small rotational force is transmitted to the winding drum 12. A weak current is applied. Further, when the power supply to the motor 25 is cut off, the winding drum 12 is locked to rotate in the feeding direction shown by the arrow in FIG.

Further, the motor 25 is connected to a control circuit (not shown) for driving and stopping the driving. This control circuit is adapted to energize the motor 25 with a weak current when the window opening operation button 10a of the operation box 10 is operated, and when the window closing operation button 10b of the operation box 10 is operated. A large amount of current is supplied to the motor 25, and when the load acting on the motor 25 becomes excessive and the value of the current flowing through the motor 25 exceeds a preset value, When this is detected, the power supply to the motor 25 is cut off.

The present embodiment has the above-described configuration, and when closing the skylight, if the window closing operation button 10b of the operation box 10 is operated, a large value of current is supplied to the motor 25 by the operation of the control circuit, and The rotational driving force is transmitted to the winding drum 12, the wire 6 is wound as the winding drum 12 rotates, and the shoji 3 3 in an oblique window-opening position moves toward the window opening direction by the stay 4. It moves to the side of the window frame 1 against the bias.

When the window is completely closed, the shoji 3 is prevented from moving by contact with the window frame 1, so that the winding of the wire 6 becomes impossible and the winding drum 12 rotates. Stop. Since the rotation of the take-up drum 12 is stopped, the rotation of the output shaft (not shown) of the motor 25 is also blocked, so that the motor 25 is overloaded and the value of the current flowing through the motor 25 is reduced. Exceeds the specified value. When this is detected in the control circuit, the motor is de-energized and the drive is stopped.

By stopping the motor 25, the winding drum 12 is prevented from rotating in both directions of winding and unwinding, whereby the shoji 3 resists the bias of the stay 4 and moves in the window opening direction. It is kept in a closed window posture without moving.

When the window opening operation button 10a of the operation box 10 is operated to open the window from the closed window state, a weak current is supplied to the motor 25 by the operation of the control circuit, and at the same time, The winding drum 12 starts to rotate in the feeding direction shown by the arrow in FIG. 2 by the biasing force of the stay 4 and the rotational force transmitted from the motor 25, and the wire 6 moves in the arrow direction shown in FIG. The shoji screen 3 swings in the window opening direction while being extended.

When the skylight is opened to the maximum opening, the shoji 3 is prevented from swinging in the window opening direction and the stay 4 is no longer biased to the winding drum 12. 12 continues to rotate by the rotational driving force of the motor 25. In the meantime, the wire 6 is separated from the one guide surface 18 of the winding drum 12 by being paid out over the entire length thereof and is locked by the deflecting roller 19 as shown in FIG. As shown in FIG. 2 (C), it is wound around the winding drum 12 while being in contact with the other guide surface 18.

The rotational force of the winding drum 12 at this time is not so large as to overcome the biasing force of the stay 4. For this reason, the rotation of the winding drum 12 is prevented in a state where the wire 6 is strained, the load acting on the motor 25 becomes significantly larger than that during the window opening operation, and the current value flowing through the motor 25 exceeds a predetermined value. This is detected by the control circuit, and the power supply to the motor 25 is cut off.

[Brief description of drawings]

FIG. 1 is an overall perspective view.

FIG. 2 (A) is a partially cutaway front view showing a wire payout state during window opening operation.

FIG. 2 (B) is a partially cutaway front view showing the wire payout state when the window is fully opened.

FIG. 2 (C) is a partially cutaway front view showing the winding state of the wire immediately after the window is fully opened.

FIG. 3 is an exploded perspective view of a winding drum.

[Explanation of symbols]

1: Window frame 3: Shoji 6: Wire 12: Winding drum 25: Motor

Claims (1)

[Scope of utility model registration request] 1. A wire, the winding end of which is fixed to a winding drum, is hung between the window frame and a shoji supporting the window frame so as to open and close freely and urged in the window opening direction. A motor in which a current having a magnitude capable of rotating the winding drum against the urging force in the window opening direction is supplied to the winding drum when the window is closed and a weak current is supplied when the window is opened. And the motor is connected to a control circuit that shuts off the power supply to the motor when the value of the current flowing through the motor during the window opening operation exceeds a predetermined value.