JP2562149Y2 - Hoist - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery-operated hoist or lifter (hereinafter referred to as a battery hoist) such as a battery-operated nursing lifter (hereinafter referred to as a battery partner), and more particularly, to a discharge and charge state of the battery. Related to a monitoring device.

[0002]

2. Description of the Related Art When a battery warning lamp is lit, a person in charge of a conventional battery hoist moves a hoist body to a fixed position and connects a battery to a charging power source.

[0003]

[Problem to be solved by the present invention] However, it is unknown whether or not charging is actually performed. The solution of this is the purpose of the present invention.

[0004]

A hoist according to the present invention which achieves the above object has a voltage comparator for judging whether or not the voltage of a battery of the hoist is lower than a predetermined voltage, and an alarm when the battery voltage is lower than the predetermined voltage. , A charge detector for detecting whether or not the battery is being charged, and a display for displaying during charging based on the detection result.

[0005]

The voltage of the battery decreases as it is consumed.
Therefore, by setting a voltage that requires charging as a predetermined voltage in advance, an alarm is issued when the battery voltage falls below the predetermined voltage. With this alarm, a notice of battery shortage is noticed. In addition, since the display is displayed during the charging, it can be determined whether or not the battery is being charged.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 is a front view of a manually-operated battery partner according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a circuit diagram of an electric control device, and FIG. 4 is an external view of the control device.

In FIG. 1 and FIG. 2, a suspension type manual traveling device 2 is continuously provided on an upper portion of a hoist main body 1.
A pair of wheels 3, 3 are supported and guided by a frame 4, and are rotatably mounted on a pair of traveling rails 5, 5 for example. The running of the hoist is performed by manually pulling the rope 6 attached to the hoist body 1. The hoist body 1 includes a battery (not shown), a hoist using a DC motor using the battery as a power source, and a control circuit for controlling the hoist. An attachment 8 of an assisting tool is connected to the rope 7 of the hoist, and operations such as hoisting and lowering of the hoist are performed by switches of a pendant 9 connected to a control circuit by a cable.

On the lower surface of the hoist body 1, a red indicator light 10A as an alarm and a green indicator light 10B for indicating whether or not the battery is being charged are provided. The indicator light 10A is normally lit. Flicker (blinks) when the control circuit described below detects a decrease in battery voltage. Indicator light 1
OB lights up during charging.

Next, the control circuit shown in FIGS. 3 and 4 will be described. In FIG. 3, coils of two relays RC for detecting charging are connected between the terminals 13 on the battery side for charging and diodes D ₀ and D ₁ for absorbing back electromotive current in parallel. The battery terminals 13, 13 are connected to a charging power supply (not shown) by lead wires 31, 32 shown in FIG. Further, between the charging battery side terminals 13, 13,
The battery 20 is connected via the reverse connection preventing diode D ₂ , the fuse F ₁ and the terminal 33 shown in FIG. The battery 20 is obtained by connecting two 12-volt batteries in series. The battery 20 is connected to green indicator 10B (e.g. LED) through the limiting resistor R ₀ and relay normally open contact RC ₁ of RC, RC _2. Thus, when a charging power supply is connected to the battery 20 and a charging voltage is applied, the contacts RC ₁ and RC ₂ are closed and the green indicator light 10B is turned on. If no charging power source is connected, since the contact RC _1, RC ₂ is open, the green indicator 10B is blinking lights. As the battery voltage, the voltage V _{B / 2} at the midpoint between the two batteries is used, and this is used as a comparator IC.
₃ Inverted input terminal. On the other hand, connects the constant-voltage circuit IC ₁ through the normally closed contact RC ₃ of the relay RC first to the battery 20, its output voltage variable resistor VR ₁ and 2
The predetermined voltage V _REF is variably divided by the two fixed resistors R ₁ and R _2, and is _supplied to the non-inverting input terminal of the comparator IC ₃ . Thereby, the battery voltage V _{B / 2}
While the voltage exceeds the predetermined voltage V _REF , the comparator IC ₃
Is low, but goes high when the voltage falls below the predetermined voltage _VREF . During charging, the contact RC ₃ opens,
Comparator IC ₃ stops its operation. C _{0 to} C ₄ are capacitors. Therefore, to connect the base of transistor T _r1 through a resistor R ₃ to the output of the comparator IC _3, a constant current drive of the large and small two stages with power supplied from the emitter to the multi-vibrator 21, the relay RC as the load of the multivibrator 21 Normally closed contacts RC ₄ and RC
₅ is connected to a red indicator light 10A. The collector of the transistor T _r1 is performing the power supply through a second constant voltage circuit normally closed contact RC ₆ of the relay RC from IC ₂ connected to the battery 20. Thereby, the battery voltage V
_{B / 2} is supplied a sufficiently large current from the transistor T _r1 becomes below the predetermined voltage V _REF multivibrator 21
Operates, and the red indicator light 10A flashes to issue an alarm. While the battery voltage V _{B / 2} is greater than the predetermined voltage V _REF has a small current supplied from the transistor T _r1, the multivibrator 21 is not operated, only the transistor T _r3 is turned on, the red indicator light 10A is lit I do. Incidentally, R ₄ is stable resistor, C ₅ -C ₈ denotes a capacitor. Multivibrator 21 and the transistor T _r2, T _r3, and the resistor R ₅ to R _8, a capacitor C _9, C _10, a diode D
It consists of _three . During charging it opens the contact RC ₄ to RC _6, red indicator 10A is flashing lights.

On the other hand, the upper limit switch LS ₁ and through two relay R3 to the second constant voltage circuit IC ₂ to be turned off when detecting the upper limit of hoisting (UP) switch 22 and a take-in pendant 9, each coil of RB3 are connected in parallel, also lower limit switch LS ₂ and two relays through R4 to be off when similarly detect the lower limit of the winding under (DOWN) switch 23 and under winding in pendant 9,
Each coil of RB4 is connected in parallel. D ₄ to D ₇ are counter electromotive current absorbing diode. Each of the limit switches LS ₁ and LS ₂ is connected to a control circuit via terminals 34 and 35 shown in FIG. Relay R3 is a top winding, the normally open contacts R3, R3 ₂ is the forward direction to the DC motor 24 of the hoisting machine from the battery 20 when closed current is supplied. Relay R4 is a lower volume, the normally open contacts R4 _1, R4 ₂
Is closed, a reverse current is supplied from the battery 20 to the DC motor 24 of the hoist. The DC motor 24 and each relay contact are connected to a control circuit via terminals 36 and 37 shown in FIG. Relay RB3 is for brake release during hoisting, then the normally open contact RB3 ₁ is closed, normally is supplied with current from the battery 20 to the electromagnetic brake 25 during operation becomes brake release. When relay RB4 is for brake release at the time under the winding, in which the normally-open contact RB4 ₁ is closed,
Similarly, a current is supplied to the electromagnetic brake 25 to release the brake. The electromagnetic brake 25 and each relay contact are connected to a control circuit via terminals 38 and 39 shown in FIG. Therefore, the winding is performed while the switch 22 is on, the lowering is performed while the switch 23 is on, and the operation is stopped while both switches are off.

In the above embodiment, when the battery 20 is exhausted and the capacity becomes insufficient, the red indicator lamp 10A flashes and an alarm is issued, so that the user can immediately notice this and charge the battery. Also, during charging, the green indicator lamp 10B is lit, indicating that the battery is really being charged.

In the above embodiment, a visual warning is issued using the red indicator light 10A as an alarm.
Any warning means such as issuing an audible warning using a buzzer or the like alone or in combination with this can be adopted.

[0013]

According to the present invention, a warning is issued when the battery runs short, so that the battery can be charged immediately.
In addition, since a display is displayed during charging, it can be determined whether or not the battery is really charged.

[Brief description of the drawings]

FIG. 1 is a front view of a manually-operated battery partner according to an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a diagram showing a circuit example of a control device;

FIG. 4 is a diagram showing an appearance of a control device.

[Description of Signs] 1 Hoist main body 2 Traveling device 3 Wheel 4 Frame 5 Rail 6 Rope 7 Rope 8 Attachment 9 Pendant 10 Indicator light 10A Alarm red indicator light 10B Charging indicator green indicator light 13 Battery terminal for charging 20 Battery 21 multivibrator 22 hoisting switch 23 vol under switch 24 DC motor 25 electromagnetic brake IC _1, IC ₂ constant voltage circuit IC ₃ comparator T _r1 through T _r3 transistor VR ₁ variable resistor R ₀ to R ₈ resistors C ₀ -C ₁₀ capacitor D ₀ to D ₇ diode RC charging detection relay R3, R4, RB3, RB4 relay LS _1, LS ₂ limit switches V _{B / 2} battery voltage V _REF predetermined voltage

Claims (1)

(57) [Scope of request for utility model registration] 1. A voltage comparator for judging whether the voltage of a battery of a hoist is equal to or lower than a predetermined voltage, an alarm device for issuing an alarm when the battery voltage is equal to or lower than a predetermined voltage, and detecting whether or not the battery is being charged. A hoist comprising: a charge detector that performs charging; and a display that displays during charging based on the detection result.