JP2001220079A - Charging device of stair case elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly prevent by an electric means a terminal short circuit accident when a person contacts with a charging terminal. SOLUTION: A fixing-side charging terminal 14 is placed on rails 11 of an elevator body 1 and is connected to a charger 15. The elevator body 1 comprises a moving-side charging terminal 7 connected to the fixing-side charging terminal 14 through a charging point, and obstacle sensors 5, 6 for detecting an obstacle or the like. The moving-side charging terminal 7 is connected to a battery 4 through a breaker. The charger 15 recognizes the connection with the battery 4 and starts charging. When the obstacle sensors 5, 6 operate during the charging, the breaker operates to disconnect between the moving-side charging terminal 7 and the battery 4. Thus, the charger 15 instantly stops output to provide the moving-side charging terminal 7 and the fixing-side charging terminal 14 into a non-voltage state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for charging a battery of a stair climber.

[0002]

2. Description of the Related Art In general, during charging of a battery, a voltage is applied to a charging terminal. Therefore, a terminal short-circuit accident occurs due to human intervention, or an overcurrent flows when tampering occurs, and wiring is burned. Battery failure may occur. Therefore, conventionally, measures have been taken to cover and protect the terminal portion with a cover.

[0003]

However, according to the conventional protection measures, a mechanism for opening the cover when the elevator body is moved to the charging point is required, which complicates the structure of the terminal portion and reduces the cost. It was easy to invite and break down.

It is an object of the present invention to provide a charging device for a stair climber, which can reliably prevent a terminal short-circuit accident when a charging terminal is touched by a person by electrical means.

[0005]

In order to solve the above-mentioned problems, a charging apparatus according to the present invention is provided in a stair lift using a battery as a power source, wherein a fixed charging terminal is provided in a lifting passage of a main body of the elevator. The charging terminal is connected to the charger, and the elevator body is provided with a moving charging terminal connected to the fixed charging terminal at a charging point, and an obstacle sensor for detecting an obstacle or the like. Connected to the battery via the power supply and configured to activate the circuit breaker when the obstacle sensor operates.

In this case, it is preferable to provide the charger with a means for checking the connection with the battery and starting charging. With this configuration, when the circuit breaker cuts off the connection between the battery and the moving-side charging terminal, the charger immediately stops the output, so that the moving-side charging terminal and the fixed-side charging terminal can be put in a non-voltage state. .

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show the overall configuration of a stair climber. A lift main body 1 is composed of a mechanism section 2 and a seat section 3. The mechanism section 2 includes a battery 4 that is a power source of a motor (not shown), an upward obstacle sensor 5 and a downward obstacle sensor 6 that detect an obstacle on a stair, and a pair of moving-side charging terminals 7. Is provided. The armrest 8 of the seat 3 is provided with a switch 9 for switching the traveling direction of the elevator body 1.

On the stairs, two rails 11 forming an elevating passage of the elevator main body 1 are supported via columns 12. A terminal mounting plate 13 is fixed to the rail 11, and a pair of fixed charging terminals 14 are mounted on the mounting plate 13. A charger 15 is installed on the lower floor or the like, and a fixed-side charging terminal 14 is connected to the charger 15. When the elevator main body 1 stops at the charging point (the position indicated by a chain line in FIG. 1), the movable charging terminal 7 is connected to the fixed charging terminal 14.

FIG. 3 shows an electric circuit of the charging device.
The movable charging terminal 7 of the elevator main body 1 is a normally closed circuit breaker 20.
, And the battery 4 and the obstacle sensors 5 and 6 are connected to a controller 21 having a motor drive circuit and the like. And the controller 21
When the obstacle sensors 5 and 6 detect an obstacle such as a human body on the stairs during ascending and descending, the elevator body 1 is immediately stopped to ensure safety, and the obstacle sensors 5 and 6 during charging. When the detecting operation is performed, the circuit breaker 20 is operated to disconnect the connection between the movable charging terminal 7 and the battery 4.

On the other hand, the charger 15 is provided with a power supply circuit 22, a voltage comparator 23, a current comparator 24, and a relay 25. These elements confirm the connection between the charger 15 and the battery 4 and perform charging. Means for initiating are configured. That is, the elevator body 1 stops at the charging point,
When the movable charging terminal 7 is connected to the fixed charging terminal 14, the voltage comparator 23 compares the terminal voltage Ec of the battery 4 with the reference voltage Es1, and when Ec> Es1,
It is confirmed that the battery 4 is connected to the charger 15. Then, the voltage comparator 23 sets the transistor Tr1 to O
N, triggering the current comparator 24, the current comparator 24 turns on the transistor Tr2 and excites the relay 25. Thereby, the contact Ry of the relay 25 is closed, charging is started, and the output of the power supply circuit 22 is supplied to the battery 4 via the fixed charging terminal 14 and the movable charging terminal 7.

During charging, a charging current Ic according to the state of the battery 4 flows, and the current comparator 24 compares the charging current Ic input via the resistor Rs with the reference value Es2, and
When Rs <Es2, full charge is confirmed, the transistor Tr2 is turned off, and the relay 25 is demagnetized. As a result, the contact Ry opens, the connection between the power supply circuit 22 and the fixed-side charging terminal 14 is cut off, and the charging of the battery 4 is completed. When the elevator body 1 reaches the charging point while the battery 4 is fully charged, charging is temporarily started. However, the current comparator 24 confirms that Ic × Rs <Es2, Stop charging output immediately. Also,
The current comparator 24 also demagnetizes the relay 25 and immediately stops charging output even when an overcurrent flows due to a terminal short-circuit accident or the like.

In the stair climber configured as described above, when the elevator body 1 stops at the charging point, the movable charging terminal 7 is connected to the fixed charging terminal 14 and the charger 1
5 confirms the connection with the battery 4 and starts charging according to the consumed state of the battery 4. When the obstacle sensors 5 and 6 perform a detection operation during charging, the circuit breaker 20 operates to cut off the connection between the mobile charging terminal 7 and the battery 4, and the charger 15 confirms that the battery 4 is not connected. The output is immediately stopped, and the movable charging terminal 7 and the fixed charging terminal 14 enter a no-voltage state. When the obstacle sensors 5 and 6 no longer detect a person or an obstacle, the circuit breaker 20 returns to connect the moving-side charging terminal 7 to the battery 4, and the charger 15 confirms the connection with the battery 4. Restart charging.

Therefore, according to the charging device of this embodiment, even when a person intentionally or negligently touches the charging terminals 7 and 14 during charging, the moving-side charging terminal 7 and the fixed-side charging terminal 14 are previously charged with no voltage. In this state, it is possible to eliminate the risk of occurrence of a terminal short-circuit accident, and to prevent wiring burnout and battery failure due to overcurrent. Also, since the terminal short-circuit accident is prevented by electrical means, the charging terminal 7,
There is no need to protect the cover 14 with a cover, so that the structure of the terminal portion can be simplified and the cost can be reduced, and a failure can be avoided to increase the reliability of the charging device. Further, when the elevator main body 1 is located at a position other than the charging point, the charger 15 confirms that the battery 4 has not been connected and stops outputting, so that when the person touches the fixed side charging terminal 14 in the exposed state. However, there is no possibility that an electric shock or a terminal short-circuit accident may occur.

The present invention is not limited to the above-described embodiment, and may be implemented by appropriately changing the shape and configuration of each part without departing from the spirit of the present invention.

[0015]

As described above in detail, according to the charging device of the present invention, the terminal short-circuit accident when a person touches the charging terminal can be reliably prevented by the electric means, and the terminal portion is eliminated by removing the cover. An excellent effect is obtained that the configuration can be simplified and inexpensive, and the reliability can be improved by avoiding a failure.

[Brief description of the drawings]

FIG. 1 is a front view of a stair climber showing an embodiment of the present invention.

FIG. 2 is a side view of the stair climber.

FIG. 3 is an electric circuit diagram of the charging device.

[Explanation of symbols]

1. Elevator body, 4. Battery, 5, 6, Obstacle sensor, 7, Mobile charging terminal, 11, Rail, 1
4 fixed terminal, 15 charger, 20 breaker, 23 voltage comparator, 24 current comparator, 25
·relay.

Claims (2)

[Claims] 1. A stair lift using a battery as a power source, wherein a fixed charging terminal is provided in a lifting passage of the elevator main body, the fixed charging terminal is connected to the charger, and the fixed charging terminal is connected to the fixed charging terminal at the charging point. A moving-side charging terminal to be connected and an obstacle sensor for detecting an obstacle or the like are provided. The moving-side charging terminal is connected to a battery via a breaker, and the breaker operates when the obstacle sensor operates. Charging device configured as described above. 2. The charging device for a stair climber according to claim 1, further comprising means for checking connection of the battery to the charger and starting charging.