JPH0395083A - Electromagnetic shelter device for elevator - Google Patents

Abstract

PURPOSE:To shelter the pit of an elevator in electromagnetic terms by providing a sheltering member made of a photo-penetrative electroconductive substance, which shelters electromagnetically the monitoring window in the elevator door on the get-on place side, and a grounding member made from a conductor which is connected with this sheltering member and puts it in grounded condition. CONSTITUTION:An electromagnetic shelter device for an elevator fitted in a collective housing and operated by a linear motor 6 includes a door 20 on get-on place side, which is furnished at the get-on place on each floor, and a monitoring window 21 provided in this door 20 and made from a transparent material 22 such as glass. A plurality of sheltering members 23 formed from an electroconductive film having photo-penetrativeness are affixed to this transparent material 22 of the window 21 and connected together into a single body in electric terms by the use of grounding members each consisting of a conductor, followed by grounding. Accordingly this window 21 formed from a glass etc. as non-magnetic substance can have similar function to an electromagnetic shelter. Therefore, the whole pit 9 for elevator can be put in a condition as if it were surrounded by a shield case.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to shielding electromagnetic waves radiated from electrical equipment, etc. [Prior Art] Fig. 4 is a basic configuration diagram showing a conventional linear motor elevator. FIG. 5 is a circuit configuration diagram showing a power supply section of a conventional elevator for a linear motor vehicle, and FIG. 6 is a front view of a landing door provided in a conventional elevator for an apartment building.

In the figure, (1) is an elevator car, (2) is a counterweight of the elevator car (1), and (3) is a pulley rotatably attached to the top of the counterweight (2). , (4) is a barb wheel rotatably attached to the machine room (not shown) of the elevator. (5) has one end fixed to the upper part of the elevator car (1), and the return wheel (
4), and the pulley (3) of said counterweight (2)
The hoisting rope is attached to the upper part of the elevator hoistway (9) through the lower part of the hoisting rope. (6) is a near motor (6) disposed on the counterweight (2), and (7) is a near motor (6) disposed on the wall of the hoistway (9) of the elevator.
), and (8) is a guide rail that guides the elevator car (1) up and down.

(10) is a control unit that controls the vertical drive of the linear motor (6) to control the raising and lowering of the elevator car (1). This control section (10) controls the linear motor (
6) is supplied with variable voltage and variable frequency power to control its driving speed. (11) is the control unit (10
) is a power cable (12) that transmits the electric power of the linear motor (6) to the control unit (10) and the elevator car (
1) is a control cable through which control signals are sent and received.

In FIG. 5, (13) is a diode converter that converts the AC output from the power source (18) into DC, and (14) is the diode converter that reconverts the DC output from the diode converter (13) into AC having a predetermined frequency. It is a transistor inverter. (15) is a smoothing capacitor, (16) is a regenerative power processing resistor, and (17) is a regenerative power control transistor.

These diode converter (13), transistor inverter (14), smoothing capacitor (15), regenerative power processing resistor (16), and regenerative power control transistor (17) are installed in the control section (10). This constitutes a power supply section (10a). This power supply section (1'
O a ) supplies variable voltage, variable frequency alternating current power to the linear motor (6) and drives it to raise and lower the elevator car (1).

In Fig. 6, (20) is a landing door installed on each floor of an elevator for an apartment complex, and (21) is the landing door (21).
0) is a glass window with a transparent glass (22) provided at the top center. (30) is the glass window (22)
This is a passenger riding in the elevator car (1) that can be seen through the elevator.

Next, the operation of the conventional linear motor elevator constructed as described in Section 2 will be explained.

Passengers (30) boarding elevator car (1)
A control signal sent out by selecting a desired floor is sent to the control unit (10) via a control cable (12).

The control section (10) controls the power supply section (1) according to the control signal.
The transistor inverter (14) of 0a) is controlled, and is incorporated in the counterweight (2)
supply power with the required voltage and frequency to the The linear motor (6) slides the counterweight (2) up and down along the guide rail (7) according to the variable voltage and variable frequency values of the supplied power. Therefore, the elevator car (1) moves up and down in the elevator hoistway (9) along the guide rail (8) as the counterweight (2) moves, and the elevator car (1) moves up and down in the elevator hoistway (9) along the guide rail (8). It goes up and down to the desired floor and stops.

[Problems to be Solved by the Invention] Since the conventional linear motor elevator is configured as described above, the elevator car (1) can be raised and lowered by driving the lower part of the linear motor (6). there were.

However, the control unit (
10) is a power supply unit (1) disposed in the control unit (10).
The transistor inverter (14) of 0a) performs a switching operation to output variable voltage and variable frequency power, and at this time generates a high frequency.

Further, the linear motor (6) that moves the counterweight (2) up and down moves the main body of the linear motor (6) in the hoistway (9) of the elevator. Therefore, the power cable (11) is required to have a considerable length commensurate with the moving distance of the linear motor (6). Therefore, the high frequency waves generated by the power supply unit (1.0a) are transmitted by using the power cable (11) as an antenna that emits radio waves.
It is radiated into the inside of the elevator hoistway (9).

By the way, in elevators constructed in apartment complexes, etc., as shown in Fig. 6, from the viewpoint of security to prevent crimes in the elevator, the door of the elevator car (1) and each floor are closed. Landing door (20) installed in
For example, JEAS-40 of the Japan Elevator Association standard
As shown in Type 4, a glass window (21) is provided so that the interior of the car (1) can be easily viewed.

Therefore, the high-frequency electromagnetic waves radiated from the power cable (11) leak to the outside without being attenuated through the glass windows (21) of the landing doors (20) provided on each floor of the elevator. electrical equipment installed outside,
For example, there is a possibility of interfering with radio and television reception, or causing interference with home wireless telephones.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electromagnetic shielding device for an elevator for an apartment complex that does not leak unnecessary electromagnetic waves to the outside.

In addition, Japanese Patent Laid-Open No. 62 (1982) developed technology for smooth operation of wireless communication indoors using radio waves without affecting the outside world.
There is one published in Publication No. -269430.

[Means for Solving the Problems] An electromagnetic shielding device for an elevator according to the present invention is an elevator having a viewing window formed of a transparent member for viewing the inside of a car moving up and down a hoistway of an elevator moved by a linear motor. a landing door of the elevator, a shielding member formed of a translucent conductor disposed in a visual window of the elevator landing door and electromagnetically shielding the visual window, and a shielding member connected to the shielding member. The device is equipped with a grounding member made of a conductive material to ground it.

[Function] In the present invention, the elevator car is provided with a viewing window which is arranged in the hoistway of the elevator or is arranged at the platform of the elevator for the apartment building operated by the drive of the elevator, and which allows the interior of the elevator car to be visually seen. This is because the landing door and the shielding member having translucency, which is disposed at the visual window of the elevator landing door and electromagnetically shields it, are grounded.
The visibility window of the landing door of the elevator can be electromagnetically shielded,
The entire elevator hoistway can be electromagnetically shielded.

[Example] Examples of the present invention will be described below.

FIG. 1 is an overall configuration diagram showing an electromagnetic shielding device for an elevator according to an embodiment of the present invention, FIG. 2 is a basic configuration diagram showing a shielding part of an electromagnetic shielding device for an elevator according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of a shielding portion of an electromagnetic shielding device for an elevator according to an embodiment of the present invention.

Note that in the drawings, the same reference numerals and symbols as those in the conventional example indicate the same or equivalent parts as in the conventional example, and therefore, redundant explanation will be omitted here.

In FIG. 1, (9a) is the elevator car (1).
) and a counterweight (2) equipped with a linear motor (6)
) is the hoistway wall of the hoistway (9) through which the elevator goes up and down.

(20) is an elevator landing door that opens and closes at the landing of each floor of the hoistway (9), and (21) is a transparent glass etc. that is installed at the upper center of the landing door (20). This is a viewing window that is a window equipped with a transparent member (22). Is this visual window (21) the elevator? This is to visually check the inside of the car (1).

In FIG. 2, reference numeral (23) indicates a plurality of shielding members attached to the surface of the transparent member (22) of the landing door (20) to shield electromagnetic waves. This shielding member (23) is formed of a rectangular thin metal film having light-transmitting properties. (24
) is a grounding member made of a conductor that electrically connects the shielding member (23) together and grounds it.

In FIG. 3, (25) is a light-transmitting protective member that covers the shielding member (23) attached to the surface of the transparent member (22). This protective member (25) is obtained by hard-coating the shielding member (23) with a transparent synthetic resin or the like. Further, the protection member (25) prevents damage such as peeling off of the shielding member (23) due to external pressure being applied to the transparent member (22).

Next, the electromagnetic shielding device for an elevator of this embodiment configured as described above will be explained.

The variable voltage variable frequency power output from the power supply unit (10a) installed in the control unit (10) that controls the linear motor is transmitted to the linear motor (6) via the power cable (11).
). At this time, the power supply section (1 0 a)
generates high frequency waves, the power cable (
11) as an antenna, electromagnetic waves are radiated into the hoistway (9) of the elevator. Then, the power cable (11
) The electromagnetic waves radiated through the elevator hoistway (9) leak to the outside through the hoistway wall (9a) of the elevator hoistway (9) or the transparent member (22) of the landing door (20) of the landing of each floor. .

Due to its nature, electromagnetic waves that attempt to leak to the outside through the transparent member (22) of the elevator landing door (20) are
It converges on a conductive shielding member (23) attached to the transparent member (22), passes through the interior of the shielding member (23), and is transmitted to the elevator landing door (20). That is,
The electromagnetic waves that collide with the visibility window (21) of the landing door (20) of the elevator are transmitted from the shielding member (23) to the landing door (20).
0) and through the hoistway wall (9a). Further, each of the shielding members (23) is a grounding member (2).
4) is grounded and has zero potential, and can simultaneously shield against electric fields contained in electromagnetic waves. Therefore, the elevator landing door (20) can provide electromagnetic shielding against electromagnetic waves.

On the other hand, the building material such as concrete constituting the hoistway wall (9a) of the elevator is an electromagnetic shielding body having a large resistance to the electromagnetic waves, and in addition, the hoistway wall (9a) of the elevator ) The reinforcing bars buried in the concrete that form the structure have the property of an electrical conductor that converges electromagnetic waves. Therefore, the hoistway wall (9a) of the elevator hoistway (9) functions as an electromagnetic shield.

Therefore, the elevator landing door (20) provided with the shielding member (23) and the elevator hoistway (9) in which the landing door (20) is provided are provided with an electromagnetically shielded shield case or shield box. It functions in the same way. That is, the power supply unit (10) of the control unit (10)
The electromagnetic waves generated by a) and radiated into the elevator hoistway (9) by the power cable (11) that supplies power to the linear motor (6) are transmitted through the entire elevator hoistway (9). It is electromagnetically shielded and attenuated greatly.

As described above, the electromagnetic shielding device for an elevator according to the above embodiment includes a landing door (20) disposed at a landing on each floor of an elevator for an apartment building operated by a linear motor (6);
A viewing window (21) formed by attaching a transparent member (22) made of transparent glass or the like to the landing door (20) of the elevator.
), and a plurality of shielding members (2) formed of a thin film of a light-transmitting conductor on the transparent member (22) of the viewing window (21).
3), and the shielding members (23) are electrically connected together using a grounding member (24) formed of a conductor and grounded.

Therefore, in the first embodiment, the visibility window (21) made of non-magnetic transparent glass or the like of the landing door (20) of the elevator landing can have the same function as an electromagnetic shield. . For this reason, the hoistway (9) of the elevator
The whole can be turned into a shield case. That is, the driving portion of the elevator operated by the linear motor (6) is electromagnetically shielded, and electromagnetic waves leaking to the outside are greatly attenuated. Therefore, radio wave interference will not be caused to electrical equipment installed outside. Further, the shielding part 4; 4' (23) is used for the elevator car (23) to pass light.
1) The interior of the building can be easily seen, and the safety of the JI residential elevator will not be compromised.

By the way, the shielding system (23) in the above embodiment is one in which a plurality of shielding members are installed in parallel on the transparent part (22), but when carrying out the present invention, the shielding system (23) is not limited to this. , any material may be used as long as it functions as an electromagnetic shield that blocks electromagnetic waves. However, when the shielding member (23) is applied to the entire surface of the transparent member (22), the effect of maintaining the aesthetic appearance of the elevator landing door (20) can be obtained.

Further, although the electromagnetic shielding device for the elevator in the second embodiment is configured such that the shielding member (23) is disposed on the transparent member (22), when implementing the present invention, it is not limited to this. It is not necessary to use a device that acts as an electromagnetic shield for shielding electromagnetic waves. However, when the transparent member (22) of the elevator landing door (20) is made of commercially available wired glass, electromagnetic shielding can be easily achieved by simply grounding the wired glass mesh, and the work time is reduced. This has the effect of being shortened.

[Effects of the Invention] As described in Part 2, the electromagnetic shielding device for an elevator of the present invention is made of a transparent member that allows the inside of a car to be visually seen as it moves up and down the hoistway of an elevator for an apartment complex operated by a linear motor. an elevator landing door having a viewing window; a shielding member formed of a translucent conductive material disposed in the viewing window of the elevator landing door and electromagnetically shielding the viewing window; Since the grounding member is connected to the shielding member and is made of a conductive material to ground it, the visibility window of the elevator landing door can be electromagnetically shielded, and as a result, the elevator landing door can be electromagnetically shielded. The entire inside of the hoistway can be electromagnetically shielded.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram showing an electromagnetic shielding device for an elevator according to an embodiment of the present invention; Fig. 2 is a basic configuration diagram showing a shielding part of an electromagnetic shielding device for an elevator according to an embodiment of the present invention; Third
The figure is a cross-sectional view of a shielding part of an electromagnetic shielding device for an elevator according to an embodiment of the present invention, FIG. 4 is a basic configuration diagram showing a conventional linear motor elevator, and FIG. 5 is a conventional linear motor elevator. FIG. 6 is a front view of a landing door installed in a conventional elevator for an apartment building. In the figure, 20: Landing door 21: Visibility window 22: Transparent member 23: Shielding member 24: Protective member 2
5: Grounding member. Note that in the drawings, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] An elevator landing door having a viewing window formed of a transparent member for viewing the inside of a car moving up and down a hoistway of an elevator moved by a linear motor; and a viewing window of the elevator landing door. A shielding member formed of a conductive material having translucency and arranged to electromagnetically shield the viewing window; and a grounding member formed of a conductive material connected to the shielding member and bringing it into a grounded state. An electromagnetic shielding device for an elevator, comprising: a member;