JPH0238289A - Observation elevator - Google Patents

Abstract

PURPOSE:To remove a sensation of fear from a passenger in down operation with no necessity for providing a large-scale shutter device by forming the total surface or one part of a cage window in an observation elevator with liquid crystal glass changing a transmission factor of light by applied voltage. CONSTITUTION:The elevator provides in its cage a fully transparent observation window 2. This window 2 is divided in a vertical direction into two parts arranging glass, and the window uses normal transparent glass 2a in the glass upper part side and liquid crystal glass 2b, interposing liquid crystal between conductive glasses, in the bottom part side. A control unit 16 controls a rotary speed of a hoist electric motor 8 and an operative condition of the cage 1 while so as to change DC voltage of a DC power unit 7 in accordance with when the cage 1 is lifted and lowered. That is, a CPU16a counts a pulse from a pulse generator circuit 11, calculating liquid crystal applied voltage being based on a value of the counted pulse so as to be generated by the DC power unit 7 and controlling a thyristor 7c, so that the outside cannot be seen following down operation of the cage 1.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an improvement in a viewing elevator that ascends and descends while viewing the outdoors.

[Conventional technology]

In recent years, elevators in hotels, department stores, observation platforms, etc. in tourist areas have been equipped with elevators that are clearly visible from inside the elevator car to the outside.
An observation elevator is installed with a completely transparent outer wall of the car so that the outside or indoor scenery can be viewed. This observation elevator gives most passengers a sense of satisfaction when going up, but when going down, most passengers feel a sense of fear as if they were falling due to the human psychological state. ing. Therefore, in order to remove this fear, conventional methods such as
As disclosed in Japanese Patent No. 125, there is provided an observation elevator that is equipped with a shank device that controls the downward field of vision when the car is lowered, and that eliminates the sense of fear from passengers by closing the shutter of this shutter device. Proposed.

[Problem to be solved by the invention]

Conventional observation elevators are constructed as described above, and as a result of mounting a large-scale shutter device on the car, there is a problem in that the appearance of the car is spoiled, which is fatal for an observation elevator. This invention was made to solve these problems.It maintains the appearance of an observation elevator without installing a large-scale shutter device on the car, and eliminates the fear felt by passengers, especially when descending. The purpose is to obtain an observation elevator that can be used.

[Means to solve the problem]

In the observation elevator according to the present invention, the entire or part of the observation window of the car is formed of liquid crystal glass whose light transmittance changes depending on the applied voltage.

[Effect]

In this invention, since the entire surface or a part of the observation window is formed of liquid crystal glass, the transmittance of the observation window can be changed by changing the voltage applied to the liquid crystal glass depending on the operating conditions of the car (the position of the car). can be changed.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. FIG. 1 is a schematic configuration diagram of an observation elevator according to the present invention, and FIG. 2 is a perspective view of a car of the observation elevator.
Figure 3 is an explanatory cross-sectional view of the liquid crystal glass sandwiching the liquid crystal of the observation elevator, Figure 4 is a characteristic diagram of the liquid crystal according to an embodiment of the present invention, and Figure 5 is a diagram showing the voltage applied to the liquid crystal and the car position. It is an explanatory diagram showing a relationship. In FIG. 2, reference numeral 1 denotes a car, and the car 1 is provided with a completely transparent observation window 2 forming the outer wall of the car 1 so as to be clearly visible from the outside. This observation window 2 is divided into two pieces of glass in the vertical direction, and a normal transparent glass 2a is used on the upper side of the glass, and a liquid crystal is sandwiched between the conductive glass on the lower side. A soldered liquid crystal glass 2b is used. As shown in FIG. 3, this liquid crystal glass 2b has a nematic liquid crystal substance 3 such as p-azoxyanisole (PAA) sandwiched between transparent electrodes 4a and 4b, and further transparent glasses 5a and 5b are laminated. It is. In order to prevent the nematic liquid crystal material 3 sandwiched between the transparent electrodes 4a, 4b and the transparent glasses 5a, 5b from coming out from the sides, the sides are closed with plug members 6a, 6b made of Mylar film. The transparent electrodes 4a and 4b are supplied with a DC power supply 7,
As is well known, the internal liquid crystal changes its light scattering rate depending on the power supply voltage, becomes cloudy like frosted glass, and changes its light transmittance (see FIG. 4). The DC voltage of this DC power supply 7 is outputted as an AC voltage 7a by a diode 7b and a thyristor 7b connected in series. In FIG. 1, 8 is a hoisting motor, and this hoisting motor 8
is supplied with power from the three-phase AC power supply 9, and the diode 1
The rotational speed is controlled by changing the power supply voltage and frequency of the three-phase AC power supply 9 using an inverter 10 made up of AC power supplies 0a and 10b, transistors 10c and tact, and a capacitor 10e. The rotational speed of the hoisting motor 8 is detected by a pulse generator 11, and after being reduced by a speed reducer 12, the net sheave 13 is driven. This net wheel 13 has a main rope 1
4 is wrapped around the main rope 14, and the car 1 is attached to both ends of the main rope 14.
and a counterweight 15 are connected. 16 is a control unit, which is a central processing unit (CP) that integrates and controls the operation of the control unit and executes all arithmetic and logical operations.
U) 16a, and a RAM 16c storing programs and data for operating and managing the elevator and controlling the DC voltage of the DC power supply 7 when the car 1 descends or ascends;
A RAM 16c that temporarily stores and stores data necessary for calculating the elevator control program by the CPU 16a.
and an interface 16d for connecting an external device controlled by the CPU 16a.This control device 16 controls the rotation speed of the hoisting motor 8 to control the operating state of the car 1, and The DC voltage of the DC current R7 is changed as shown in FIG. 5 depending on when R1 rises or falls. In the observation elevator of this embodiment configured as described above, the CPU 16a counts the pulses from the pulse generating circuit 11, and the CPtJ 16a uses the calculated values as the basis for the liquid crystal display shown in FIG. The applied voltage is calculated to be generated by the DC power supply 7, and the thyristor 7C is controlled. As a result, as the car descends from the middle floor (MID), the applied voltage gradually increases, and the transmittance of the liquid crystal gradually changes, making it impossible to see the outside. In one embodiment of the invention described above, In a part of the transparent part of the observation window, as the car 1 descends from the intermediate floor (MID), the applied voltage is gradually increased, and the transmittance of the liquid crystal is gradually changed, so that the transparent part of the liquid crystal glass is frosted. All observation windows were made opaque so that the outside could not be seen, thereby alleviating passengers' anxiety and ensuring that they did not feel uncomfortable when looking at the car from the outside. Even if the entire viewing window is made opaque by using glass and gradually changing the transmittance of the liquid crystal, the same effect as in the above embodiment can be obtained.

【Effect of the invention】

As described above, according to the present invention, the entire surface of the observation window or
A part of the window is made of liquid crystal glass, and the transmittance of the observation window is changed by changing the voltage applied to the liquid crystal glass depending on the car operating conditions (car height W), so there is no need to make large-scale repairs to the car. It has the excellent effect of maintaining the appearance of an observation elevator without installing a shutter device, and eliminating the fear felt by passengers when descending past intermediate floors.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an observation elevator according to the present invention, FIG. 2 is a perspective view of a car of an observation elevator according to an embodiment of the invention, and FIG. 3 is a schematic diagram of an observation elevator according to an embodiment of the invention. FIG. 4 is an explanatory cross-sectional view of the liquid crystal glass sandwiching the liquid crystal, and FIG. 4 is a characteristic diagram of the liquid crystal according to an embodiment of the present invention, and FIG. 5 is a diagram showing the voltage applied to the liquid crystal and the cage position according to the embodiment of the present invention. It is an explanatory diagram showing a relationship. In the figure, 1 is a car, 2 is a viewing window, 2a is transparent glass, 2b is liquid crystal glass, 7 is a DC power supply, 8 is a hoisting motor, 9 is a three-phase AC power supply, 10 is an inverter 10, 11 is a pulse generator 12 is a speed reducer, 13 is a mesh wheel, 14 is a main rope,
15 is a counterweight, and 16 is a control device. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] In an observation elevator equipped with a fully transparent observation window so that the outside can be viewed from inside the car, the entire surface or a part of the observation window is made of liquid crystal glass whose light transmittance changes depending on the applied voltage. An observation elevator that is characterized by: