JPH0781499A - Warning device for vehicle - Google Patents

Abstract

PURPOSE:To provide a warning device for preventing a traveling vehicle from dragging a cable in any case of the vehicle connects the cable to the external power source in the stoppage to receive power supply. CONSTITUTION:A car body is provided in a portion with a plug socket 28 for receiving power supply from an external power sources 7. The plug socket 28 is provided with a warning circuit electrode 32 in a vehicle having a refrigerator 37 connected to the plug socket 28, while a plug socket cap 45 having an electrode connected to the warning circuit electrode 32 when it is attached to the plug socket 28 is provided. When a main switch 42 is closed while the plug socket cap 45 is not attached to the plug socket 28, i.e., a cable 16 is connected, a current flows to a buzzer 43 to produce warning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle such as a refrigerated vehicle for transporting perishable food, an electric vehicle or an electric forklift truck, and other vehicles, which are supplied with electric power from an outside while stopped and are frozen by the supplied electric power. The present invention relates to an alarm device for a vehicle, which is applied to a device for operating a machine or charging a battery.

[0002]

2. Description of the Related Art In a vehicle as described above, a device mounted on the vehicle and an external power source are connected by a cable to receive electric power from the outside while the vehicle is stopped. That is,
In a cold storage vehicle, the compressor of the refrigerator is operated by an external power supply during parking so that the temperature inside the cold storage does not rise during parking. In addition, in an electric vehicle, the battery is charged from an external power source during parking. Therefore, in these cases, since the vehicle and the external power source are connected by the cable, the plug at the tip of the cable must be removed from the external power source when the vehicle starts traveling.

Description will be made with reference to the drawings. In FIG. 2, 1 is a refrigerating vehicle, 2 is a driver's seat, 3 is a refrigerating cabinet, and 4 is a refrigerator. A compressor is provided inside the refrigerator 4.
A cable 5 is connected to the refrigerator 4, and a plug 6 is attached to the tip thereof.

[0004] In such a refrigerated vehicle 1, when the vehicle is stopped,
The plug 6 at the tip of the cable 5 is connected to an outlet (not shown), and the compressor is operated by commercial power supplied thereby to cool the inside of the cool box 3. When traveling, pull out the plug 6 from the outlet and wind the cable 5 around a reel or the like not shown so as not to hinder traveling. If the vehicle starts traveling without removing the plug 6 from the outlet, the cable 5 will be dragged as shown in the figure.

Therefore, a circuit has been devised to prevent such a situation from occurring. This will be described with reference to FIG. An external power source 7 is a three-phase commercial power source in this case. The external power source 7 is connected to respective one ends of electric wires 11, 12 and 13 having power switches 8, 9 and 10 interlocking with each other, and the other ends of these electric wires 11, 12 and 13 are outlets. Connected to 14. Although not shown, four receiving-side electrodes are provided inside the outlet 14, and the four receiving-side electrodes, which will be described next, are received and electrically connected. The outlet 14 is attached to a wall of a building or the like. The outlet 14 is provided with a ground electrode, and the other end of the ground wire 15 whose one end is grounded is connected to this ground electrode.

Reference numeral 16 is a cable, which corresponds to the cable 5 in FIG. The cable 16 includes four wires 17, 18, 19, 20 and electrodes 22, 23, 24, 25 of a plug 21 corresponding to the plug 6 of FIG. 2 and a connector 26 for connecting to a vehicle side circuit. It is connected between an internal receiving side electrode (not shown). The electrodes 22, 23, 24, 25 of the plug 21 are drawn exactly the same in the figure, but in reality, the mutual intervals may be slightly changed, or the width dimension or the thickness may be changed.
Incorrect connection is not possible.

Reference numeral 27 is a vehicle side circuit. This vehicle side circuit 27
Is provided with an outlet 28 to which the connector 26 is connected. The outlet 28 has four electrodes 29, 30, 3 connected to receiving electrodes (not shown) inside the connector 26.
1, 32 are provided, and these four electrodes 29, 30, 3
One end of each of four electric wires 33, 34, 35, 36 is connected to 1, 32. And these three electric wires 33, 34, 35 are
It is connected to the power supply terminal of the refrigerator 37 as a load, and the electric wire 36 is grounded to the vehicle body as a grounding circuit. The vehicle body grounding will be described later. The electrodes 29, 30, 31, 32 of the outlet 28 are also considered in the same manner as the electrodes 22, 23, 24, 25 of the plug 21 to prevent erroneous connection.

Reference numeral 38 is a relay. This relay 38 is a coil
39 and one normally open contact 40, the coil 39
Is connected between the wires 34, 35. The normally-open contact 40 is connected to a part of a series circuit of the battery 41, the main switch 42, and the buzzer 43. The main switch 42 uses the ignition switch for starting the engine of the vehicle as it is, or is another switch that works in conjunction with the ignition switch.In any case, when the driver operates the ignition switch to drive the vehicle, the main switch 42 is turned on. It will be.

The vehicle body grounding will be described. Generally, in an electric circuit, whether it is an AC circuit or a DC circuit, one pole is a ground circuit so that the polarities of loads are unified and the operation is stabilized. The same applies to loads used in vehicles such as automobiles, but since important parts of vehicles such as automobiles are made of metal such as iron, a battery as a power source and an alternator for charging the battery,
Furthermore, each pole of the rectifier is connected to the vehicle body and used as a ground circuit so that a separate wire dedicated to the ground circuit is not stretched. This is called vehicle body grounding.

In the circuit having the above-mentioned structure, the refrigerator 37 is operated by the external power supply 7 using the cable 16 when the vehicle is parked. To do this, first remove the cable 16 and plug it in.
21 is plugged into an outlet 14 attached to the wall of the building. Also, connect the connector 26 to the outlet 28 of the vehicle side circuit 27.
Connect to. Next, when the interlocked power supply switches 8, 9 and 10 are turned on, electric power is supplied from the external power supply 7 to the refrigerator 37, so that refrigeration is performed.

When the external power supply 7 is connected to the refrigerator 37, a voltage is also applied to the coil 39 of the relay 38, so that the coil 39 is excited and the normally open contact 40 is closed. Therefore, in this state, when the driver operates the ignition switch to start the engine in order to drive the vehicle, the main switch 42 is also turned on and the buzzer 43 sounds. This noise causes the driver to notice that the cable 16 remains connected and disconnect the cable 16. As a result, as shown in FIG. 2, the situation in which the vehicle runs by dragging the cable 5 (16) does not occur.

[0012]

However, this circuit is not perfect, and the cable 16
Even if is connected to the vehicle side, the buzzer 43 will not sound. That is, when the external power switches 8, 9, 10 are off. At this time, since the coil 39 of the relay 38 is not excited, the normally open contact 40 is open, and the buzzer 43 does not sound even if the main switch 42 is turned on. next,
This is when the plug 21 of the cable 16 is not connected to the outlet 14. Also at this time, the external power switch 8,
Same as when 9 and 10 are off. Furthermore, it is when the external power supply 7 side has a power failure. At this time, the same result is obtained.

In any of these cases, the driver of the vehicle should pay sufficient attention to check the buzzer 43 regardless of the sound of the buzzer 43 and allow the vehicle to run. It is undeniable that we only rely on the sound of the sound. The present invention has been made in view of this point, in any of the above cases,
It is intended to provide a circuit in which the buzzer 43 sounds when the driver turns on the main switch 42.

[0014]

As a means for solving the above problems, the present invention provides a vehicle in which an outlet for receiving power from an external power source is provided in a part of a vehicle body, and an electric load is connected to the outlet. An alarm circuit electrode is provided in the outlet, and an outlet cap having an electrode connected to the alarm circuit electrode when attached to the outlet is provided, and the electrode of the outlet cap is connected to one pole of a vehicle-side power source via a relay. A buzzer is connected in series to the normally closed circuit of the relay and connected to the vehicle side power source.

[0015]

With this structure, when the electric load of the refrigerator or the like is not connected to the external power source when the vehicle is traveling, the outlet cap is attached to the relay coil when the main switch is closed. Since it is excited, the normally closed contact opens and the buzzer circuit is not energized. Therefore, the inconveniences in the above cases do not occur.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will now be described with reference to FIG.
The same components as those in FIG. An external power source 7 is a three-phase commercial power source in this case. This external power source 7 has a power switch 8,
The electric wires 11, 12 and 13 through which 9 and 10 are inserted are connected to respective one ends, and the respective other ends of these electric wires 11, 12 and 13 are connected to an outlet 14. Although not shown, four receiving-side electrodes are provided inside the outlet 14, and the four receiving-side electrodes, which will be described next, are received and electrically connected. The outlet 14 is attached to a wall of a building or the like. The outlet 14 is provided with a ground electrode, and the other end of the ground wire 15 whose one end is grounded is connected to this ground electrode.

Reference numeral 16 is a cable, which corresponds to the cable 5 in FIG. The cable 16 includes four wires 17, 18, 19, 20 and electrodes 22, 23, 24, 25 of a plug 21 corresponding to the plug 6 of FIG. 2 and a connector 26 for connecting to a vehicle side circuit. It is connected between an internal receiving side electrode (not shown). The electrodes 22, 23, 24, 25 of the plug 21 are drawn exactly the same in the figure, but in reality, the mutual intervals may be slightly changed, or the width dimension or the thickness may be changed.
Incorrect connection is not possible.

Reference numeral 27 is a vehicle side circuit. This vehicle side circuit 27
Is provided with an outlet 28 to which the connector 26 is connected. The outlet 28 has four electrodes 29, 30, 3 connected to receiving electrodes (not shown) inside the connector 26.
1, 32 are provided, and these four electrodes 29, 30, 3
One end of each of four electric wires 33, 34, 35, 36 is connected to 1, 32. And these three electric wires 33, 34, 35 are
The electric wire 36 connected to the power supply terminal of the refrigerator 37 as a load and connected to the electrode 32 serving as an alarm circuit electrode is grounded as a ground circuit. The vehicle body grounding is as described above. The same consideration is given to the electrodes 29, 30, 31, 32 of the outlet 28 as for the electrodes 22, 23, 24, 25 of the plug 21, so that incorrect connections cannot be made.

Reference numeral 38 is a relay. This relay 38 is a coil
39 and one normally-closed contact 44, the coil 39
Has one end connected to the main switch 42 and the other end connected to a receiving electrode inside the outlet cap 45 described below. Although not shown, this receiving-side electrode is connected to the electrode 32 when the outlet cap 45 is attached to the outlet 28 and grounded by the electric wire 36.

The normally closed contact 44 is connected to a part of a series circuit of the battery 41, the main switch 42 and the buzzer 43. The main switch 42 uses the ignition switch for starting the engine of the vehicle as it is, or is another switch that works in conjunction with the ignition switch.In any case, when the driver operates the ignition switch to drive the vehicle, it is turned on. It will be.

This circuit having such a structure uses the cable 16 when the vehicle is parked and uses the external power source 7 to
The refrigerator 37 will be operated. To prepare and operate this, first plug the outlet cap 45 into an outlet.
28, the plug 21 of the cable 16 is inserted into the outlet 14 attached to the wall of the building, etc., and the connector 26 is connected to the outlet 28. Next, when the interlocked power switches 8, 9, 10 are turned on, electric power is supplied from the external power source to the refrigerator 37, so that the refrigerating operation is performed.

With the outlet cap 45 removed from the outlet 28, when the driver operates the ignition switch to start the engine in order to drive the vehicle, the main switch 42 is also turned on and the normally closed contact 44 is closed. Therefore, the buzzer 43 will sound.
The buzzing causes the driver to notice that the cord 16 remains connected and disconnect the cable 16.
As a result, as shown in FIG. 2, the situation in which the vehicle runs by dragging the cable 5 (16) does not occur.

Now, suppose that the above-mentioned condition, that is, when the external power switches 8, 9 and 10 are off,
When the plug 21 of the cable 16 is not connected to the outlet 14 and when the external power supply 7 side has a power failure,
Since the coil 39 of the relay 38 is not energized by the external power source 7, it is not affected at all and emits a noise when the cable 16 is connected to the vehicle side.

When the connector 26 is removed from the outlet 28 and the outlet cap 45 is attached to the outlet 28, the relay
Since the coil 39 of 38 is grounded to the vehicle body grounding circuit via the receiving side electrode inside the outlet cap 45, the electrode 32 of the outlet 28 and the electric wire 36 which is grounded to the vehicle body, the battery 41 is closed when the main switch 42 is closed. A closed circuit is formed between and, and the coil 39 is excited. Coil 39
Since the normally-closed contact 44 is opened by the excitation, the buzzer 43 does not sound even if the driver closes the main switch 42 in this way. This allows the driver to confirm that the outlet cap 45 is attached to the outlet 28.

In the embodiment described above, a three-phase power source is used as the external power source 7, but the present invention is not limited to this, and a single-phase power source can be implemented in exactly the same manner, and the same operation is performed. It is possible to obtain the effect. Although the contact type relay 38 is used, it may be an electronic one such as a transistor circuit. Further, the vehicle to be applied is not limited to the cold storage vehicle described in the embodiment, and in addition to that,
Electric vehicles or other vehicles such as electric forklifts that can be widely used for receiving electric power from outside while the vehicle is stopped and operating the equipment or charging the battery with the supplied electric power. Is.

The outlet cap 45 may be of a screw type, but may be of a lid type in which a hinge is attached to one end and a spring is always biased in the closing direction. Then, when it is closed, it is convenient for the terminal connected to the coil of the relay to automatically contact the terminal of the electric wire 36 which is grounded to the vehicle body. In addition,
With such an outlet cap 45, when the connector 26 is connected to the outlet 28, the outlet cap 45 is opened against the spring.

[0027]

As described above, the present invention provides a part of the vehicle body with an outlet for receiving power from an external power source,
In a vehicle in which an electric load is connected to the outlet, an alarm circuit electrode is provided in the outlet, and an outlet cap having an electrode connected to the alarm circuit electrode when attached to the outlet is provided, and the electrode of the outlet cap is provided. Since the vehicle alarm device is configured to be connected to one pole of the vehicle-side power source via a relay and connected to the vehicle-side power source by connecting a buzzer in series to the normally closed circuit of the relay,
As long as one end of the cable that is connected to the external power supply is connected to the vehicle side, the driver can turn on the main switch to reliably issue the alarm. This will prevent damage to cables and outlets. Further, by providing the outlet cap, the outlet can be protected from water and mud. Since a standard product can be used as this outlet cap, it is not necessary to make a mold or the like, and it can be easily adopted for a small specially equipped vehicle or the like.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a side view showing an example of an automobile to which the present invention is applied.

FIG. 3 is a circuit diagram showing a circuit on which the present invention is based.

[Explanation of symbols]

 7 External power supply 14 Outlet 16 Cable 21 Plug 22 Connector 26 Connector 27 Vehicle side circuit 28 Outlet 36 Electric wire 37 Refrigerator 38 Relay 39 Coil 41 Battery 42 Main switch 43 Buzzer 44 Normally closed contact 45 Outlet cap

Claims (1)

[Claims] 1. In a vehicle in which an outlet for receiving electric power from an external power source is provided in a part of a vehicle body and an electric load is connected to the outlet, an alarm circuit electrode is provided in the outlet and the alarm when the outlet is attached. An outlet cap having an electrode connected to a circuit electrode is provided, the electrode of the outlet cap is connected to one pole of a vehicle-side power source via a relay, and a buzzer is connected in series to a normally closed circuit of the relay to provide the vehicle. A vehicle alarm system characterized by being connected to a side power supply.