JP7561553B2 - Emergency external power conversion unit - Google Patents

Description

The present invention relates to an emergency external power conversion unit that is suitable for converting power from an external power source into power with the same voltage as the commercial power source and supplying it to power-receiving equipment such as electrical equipment when there is no commercial power supply, such as during a power outage.

For example, an opening/closing device will be described below as an example of a device using electric equipment such as a motor.
An opening/closing body device such as a shutter curtain is installed at an opening such as an entrance or window of a structural body including a building such as a house, a building, a factory, a warehouse, or a garage, or an internal passage or space, and opens or closes the opening by moving the opening/closing body. This opening/closing body device is configured to unfold and lower an opening/closing body such as a slat curtain made of many rectangular slat materials, a pipe grill curtain made of many pipe materials connected with a link material, a panel curtain made of a single panel material or a panel material connected with many panels, a net curtain made of a net material, a sheet curtain made of a sheet material made of synthetic resin or cloth fiber, or a composite curtain made of a composite material of these materials, from the top of the opening to close the entire opening. In such an opening/closing body device, the opening and closing operation of the opening/closing body is often performed electrically. Examples of electrically operated opening/closing body devices include an electric shutter device, an electric door device, and an electric awning device.

In general, an electric opening/closing body device is configured such that an opening/closing body for raising and lowering the opening and closing space of a structure such as a building is raised and lowered by an opening/closing machine (motor, etc.) installed in the ceiling of the structure or in the shutter case. In such an electric opening/closing body device, for example, some are configured so that the opening/closing body itself will descend under its own weight and be held in a fully closed state by performing a specified operation during a power outage. Therefore, in the past, when opening an opening/closing body in a fully closed state during a power outage, the opening/closing body was manually rolled up and opened, for example by rotating the output rotating shaft (rotating shaft) of the opening/closing machine with a manual operating handle installed nearby.

Some of these electrically operated opening/closing devices are equipped with an emergency power supply device that is configured to electrically operate the opening/closing device and open the opening/closing body in an emergency by connecting a fire brigade hose to the water inlet (water supply port) and discharging (supplying) water, even in the event of a power outage caused by a fire. The emergency power supply device is configured with a backup power source consisting of a battery and electronic components such as an inverter device. This emergency power supply device is connected to external devices such as an automatic closing device for the opening/closing body device, an obstacle detection device, a harm prevention interlocking relay, an operation switch with a start button, and a water pressure switch, as well as an external power line. An example of an opening/closing body device equipped with such an emergency power supply device is described in Patent Document 1. In addition, there are also devices that use a generator to supply power to the control device of the opening/closing machine (motor, etc.) during a commercial power outage.

JP 2009-79457 A

When using the manual operation handle during a commercial power outage, the worker must climb up onto a ladder or workbench to open the inspection hatch at the top while opening and closing the opening/closing body, making the operation extremely cumbersome. On the other hand, when an emergency power supply device such as that described in Patent Document 1 is installed, the equipment costs increase and the backup power battery needs to be replaced periodically. Alternatively, when a generator is used, the equipment costs increase and maintenance such as refueling the generator and changing the oil is required.

The present invention has been made in consideration of the above points, and aims to provide an inexpensive emergency external power conversion unit that can easily supply power from an external power source to powered equipment such as electrical devices when there is no commercial power supply, such as during a power outage, without significantly increasing equipment costs or maintenance work.

A first feature of the emergency external power conversion unit of the present invention is that it comprises a conversion means that is connected to a battery as an external power source having a connection terminal and converts power input from the battery into power of the same voltage as the commercial power source, a first cable having a connector means at one end for connecting to the connection terminal of the battery and connecting the conversion means to the battery, a second cable that connects the conversion means to equipment supplied with commercial power, and a first cable harness means having a connector means at one end for engaging with the connection terminal of the battery and a connector means at the other end for engaging with the connector means of the first cable, and when it is not possible to mate the connection terminal of the battery with the connector means of the first cable, the connection terminal of the battery and the connector means of the first cable are connected via the first cable harness means, and the power converted by the conversion means is supplied to the supplied equipment.
In this specification, "supplied equipment" refers to equipment such as electrical equipment that is supplied with commercial power under normal circumstances and is supplied with power based on an external power source when there is no commercial power supply during a power outage or other such event, or that is not supplied with power from a commercial power source under normal circumstances and is supplied with power based on an external power source in an emergency (at any time).

The present invention provides an emergency external power supply conversion unit as a disaster prevention device for use in emergencies such as power outages, and provides an inexpensive emergency disaster prevention device that can easily supply power from an external power supply to power-supplied equipment in emergencies such as power outages.
Since the emergency external power conversion unit includes the conversion means, the first cable, and the second cable, once the battery and the emergency external power conversion unit are prepared, the necessary connection work can be performed immediately.
However, the first cable connecting the conversion means and the battery requires a length of several meters for the connection work, and in the past, if there were multiple types of battery connection terminals, it was necessary to prepare multiple types of long first cables having connector means that fit the battery connection terminals.
Therefore, by providing a first cable harness means having a connector means at one end for engaging with the connection terminal of the battery and a connector means at the other end for engaging with the connector means of the first cable, when the connection terminal of the battery and the connector means of the first cable cannot be fitted together, it becomes possible to connect the connection terminal of the battery and the connector means of the first cable via the first cable harness means. Therefore, it is only necessary to prepare a single first cable having one type of connector means, and there is no need to prepare a plurality of long first cables having different connector means, resulting in an inexpensive and compact configuration.

The second feature of the emergency external power conversion unit of the present invention is that in the emergency external power conversion unit described in the first feature, the conversion means is connected to an on-board battery as an external power source mounted on the electric forklift, and converts the power input from the on-board battery into power with the same voltage as the commercial power source.

For example, the opening/closing device is installed at or near an entrance or window, or an opening in an internal passage or space, in a structure such as a house, a building, a factory, a warehouse, or a garage, so that vehicles such as a forklift or an automobile can easily approach. In particular, electric forklifts are often used in buildings such as factories, warehouses, and garages, and an electric forklift can be easily prepared. The electric forklift is equipped with a battery, and by using the on-board battery, it is possible to easily supply power from the on-board battery to the equipment to be supplied during a power outage, without using an emergency power supply device or a generator as described in Patent Document 1. In addition, the voltage of the on-board battery of the electric forklift is equal to or greater than the voltage of the on-board battery of an automobile, so it is easy to convert it into power with the same voltage as the commercial power source.

The on-board battery of an electric forklift is provided with a connector as a connection terminal. There are two sizes of connectors for on-board batteries of electric forklifts, large and small, and the on-board batteries of large electric forklifts mainly use large-sized connectors, while the on-board batteries of small electric forklifts mainly use small-sized connectors. The large-sized connectors and the small-sized connectors are not compatible, and when using the on-board battery of an electric forklift as an external power source, it was previously necessary to prepare multiple long first cables with connectors of each size.

In the present invention, when the size of the connector of the on-board battery of the electric forklift differs from the size of the connector of the first cable, the connector of the on-board battery and the connector of the first cable are connected via a first cable harness means. Therefore, it is sufficient to prepare only one first cable having a connector of either large or small size, eliminating the need to prepare multiple long first cables having connectors of each size, resulting in an inexpensive and compact configuration.

A third feature of the emergency external power conversion unit of the present invention is that, in the emergency external power conversion unit described in the first feature, the connector means of the first cable harness means that engages with the connection terminal of the battery is a booster clip.
By using a booster clip as the connector means that engages with the battery connection terminal of the first cable harness means, it becomes possible to use a battery having a terminal (electrode) other than a connector as the connection terminal, thereby increasing versatility.

A fourth feature of the emergency external power conversion unit of the present invention is that, in the emergency external power conversion unit described in the third feature, the conversion means is connected to an on-board battery or an automotive engine starter as an external power source mounted on an automobile or motorcycle, and converts power input from the on-board battery or the automotive engine starter into power of the same voltage as the commercial power source.
In this specification, the term "vehicle engine starter" refers to a portable power supply device (a so-called "jump starter") that starts the engine of an automobile, motorcycle, truck, heavy machinery, etc., in place of the on-board battery when the power of the on-board battery becomes low.
By utilizing an on-board battery or an on-board engine starter mounted on an automobile or motorcycle, it is possible to easily supply power from the on-board battery or the on-board engine starter to the equipment to be supplied during a power outage, etc., without using an emergency power supply device or generator as described in Patent Document 1.

The on-board battery does not need to be removed from the vehicle, such as an electric forklift or automobile; the vehicle equipped with the on-board battery can be moved close to the opening/closing device and the conversion means can be connected with the on-board battery still attached to the vehicle. On-board batteries as external power sources are not limited to electric forklifts or automobiles, but also include those mounted on other vehicles that can run around or inside openings such as entrances and windows, or internal passageways and spaces in structures such as buildings, including houses, buildings, factories, warehouses, and garages.

The fifth feature of the emergency external power conversion unit of the present invention is that in the emergency external power conversion unit described in the first, second, third, or fourth feature, the second cable has a connector means at one end for connecting to a connector means provided in the powered equipment, has a connector means at one end for engaging with the connector means of the second cable, and is provided with a second cable harness means at the other end having a general-purpose AC or DC outlet.

Since the first cable has a connector means at one end for connecting to the connection terminal of the battery, and the second cable has a connector means at one end for connecting to a connector means provided in the powered equipment, the work of connecting the conversion means to the battery and the work of connecting the conversion means to the powered equipment are facilitated.
In normal times, the connector means of the second cable can be removed from the connector means provided in the equipment supplied with commercial power and the emergency external power conversion unit can be stored in another storage location; when there is no commercial power supply, the connector means of the second cable of the emergency external power conversion unit brought from the storage location can be connected to the connector means of the equipment supplied with commercial power, making it possible to supply the required power from the conversion means to the equipment supplied with commercial power without performing electrical work that requires a licensed electrician.
Furthermore, by providing a general-purpose AC or DC outlet at the other end of the second cable harness, when there is no commercial power source, such as during a power outage, the second cable harness can be used to supply power to supply equipment having a general-purpose outlet plug, such as lighting devices, temperature control devices, heaters, and refrigerators, thereby increasing versatility.

A sixth feature of the emergency external power supply conversion unit of the present invention is that, in the emergency external power supply conversion unit described in the fifth feature, the other ends of the first cable and/or the second cable are pre-connected to a conversion means.
Since the other end of the first cable and/or the second cable is already connected to the conversion means, when using the emergency external power supply conversion unit, there is no need to connect the first cable or the second cable to the conversion means again, and the minimum required work can be performed quickly.

A seventh feature of the emergency external power conversion unit of the present invention is that, in the emergency external power conversion unit described in the first, second, third, fourth, fifth, or sixth feature, it comprises a portable case that houses the conversion means, the first cable, and the second cable, and the portable case has a case body having an access port, a lid that covers the access port of the case body, and a stopper means that holds the lid in an open state, and the stopper means has a support member that supports the lid and a moving piece that fixes the support member and releases the fixation of the support member.
When the first cable and the second cable are taken out from the access port of the case body of the portable case, if the lid of the portable case is not fixed in the open state, the lid may close accidentally, and the hand, the first cable, and the second cable may be pinched between the case body and the lid. By providing a stopper means for holding the lid in the open state, there is no risk of the hand, the first cable, and the second cable being pinched between the case body and the lid. Furthermore, by providing the stopper means with a support member for supporting the lid and a moving piece for fixing the support member and releasing the fixation of the support member, it is possible to release the holding of the open state of the lid and close the lid without the risk of fingers being pinched by the stopper means.

An eighth feature of the emergency external power conversion unit of the present invention is that, in the emergency external power conversion unit described in the first, second, third, fourth, fifth, sixth, or seventh feature, the conversion means has an input voltage detection means for detecting and displaying the magnitude of the input voltage, and an output voltage detection means for detecting and displaying the magnitude of the output voltage.
When a fault occurs in the input system or output system of the conversion means, it is difficult to identify the location of the fault, and the task of measuring the voltage of the input line and the output line using a measuring device such as a tester is difficult in an emergency such as a disaster or power outage. The input voltage detection means is used to detect and display the magnitude of the voltage input to the conversion means, and the output voltage detection means is used to detect and display the magnitude of the voltage output from the conversion means, making it easier to identify the location of the fault and improving convenience in terms of maintenance.

A ninth feature of the emergency external power conversion unit of the present invention is that, in the emergency external power conversion unit described in the first, second, third, fourth, fifth, sixth, seventh, or eighth feature, the supplied equipment is a power supply switching means of an opening/closing body device including an opening/closing means provided on the periphery of the opening, a switching machine for electrically operating the opening/closing means, a control means for driving the opening/closing machine and electrically controlling the operation of the opening/closing means, and a power supply switching means for enabling power based on an external power source to be supplied to the control means when there is no commercial power supply, and the emergency external power conversion unit supplies the power converted by the conversion means to the power supply switching means.
An emergency external power supply conversion unit for an opening/closing body device is provided, which can easily supply power from a battery to the opening/closing mechanism (motor) of the opening/closing body device.

A tenth feature of the emergency external power conversion unit of the present invention is that, in the emergency external power conversion unit described in the ninth feature, the power supply switching means supplies power from the commercial power supply to the control means when there is a supply of commercial power.
When a commercial power supply is available, an emergency external power supply conversion unit for a switching device that is operated using the commercial power supply is provided.

The emergency external power conversion unit of the present invention can provide an inexpensive emergency external power conversion unit that can easily supply power from an external power source to power-supply equipment when commercial power is unavailable, such as during a power outage, without significantly increasing equipment costs or maintenance work.

FIG. 2 is a diagram showing an example of a schematic configuration of a shutter device which is an opening/closing body device. 2 is a diagram illustrating the operation of each device in the shutter device shown in FIG. 1 . 1 is a diagram showing an example of a circuit configuration of an external power supply conversion device of an emergency external power supply conversion unit according to the present invention; FIG. 2 is a diagram illustrating an example of the configuration of a DC/AC conversion circuit. 1 is a diagram showing an example of an emergency external power supply conversion unit according to the present invention; FIG. 6(a) is a side view of the carrying case, and FIG. 6(b) is a bottom view of the carrying case. FIG. 7A is an example of an external view of an external power conversion device, a DC cable, an AC cable, and a first cable harness, and FIG. 7B is an example of an external view of a cable storage device. FIG. 8(a) is an external view of the cable storage device with an AC cable wound around it, and FIG. 8(b) is an external view of the cable storage device with a DC cable further wound around it. FIG. 13 is a diagram showing an example of a usage method display. 1A to 1C are diagrams illustrating a configuration and a usage example of a first cable harness according to an embodiment of the present invention. FIG. 2 shows a first cable harness according to another embodiment of the present invention. FIG. 2 illustrates a second cable harness according to an embodiment of the present invention. 1A to 1C are diagrams illustrating a stopper device according to an embodiment of the present invention. 1 is a diagram for explaining displays of an input voltage detector and an output voltage detector of an external power conversion device and a fault location. FIG.

A preferred embodiment of the emergency external power conversion unit according to the present invention will be described below with reference to the attached drawings. In this embodiment, an emergency external power conversion unit for a shutter device equipped with a shutter curtain that opens and closes vertically as an opening and closing means will be described as an example. Figure 1 is a diagram showing an example of the schematic configuration of a shutter device, which is an opening and closing body device. In Figure 1, the opening and closing body device 10 is a shutter device that opens and closes the opening of an entrance and exit vertically.

The opening and closing body device 10 is installed at the opening of a building, and is basically composed of a shutter case 11, a shutter curtain 12, guide rails 13, 14, a winding shaft 15, a chain 16, a motor 17, a position detection device 172, a control device 18, an obstacle detector 185, an operation switch 19, and a power switching device 20. Normally, the opening and closing body device 10 drives the motor 17, which is an opening and closing machine, in response to the operation of the operation switch 19 to control opening and closing. Furthermore, in this opening and closing body device 10, the shutter curtain 12 is held in an open state wound up on the winding shaft 15 by a mechanical holding mechanism (not shown), and when an emergency signal BS indicating a fire or the like is input from the outside to the control device 18 in this open state, the holding mechanism releases the open state, and the shutter curtain 12 naturally descends under its own weight to automatically close the opening.

The guide rails 13 and 14 are provided on both ends of the building opening so as to contact both ends of the shutter curtain 12, and are made of a metal member or an equivalent member having a guide groove with a U-shaped cross section that spans from the lintel to the floor. The shutter curtain 12 rises and falls along the guide grooves of the guide rails 13 and 14 to open and close the opening.

The winding shaft 15 is rotatably mounted on both ends of the shutter case 11, and winds and unwinds the shutter curtain 12. The chain 16 connects a driving sprocket mounted on the rotating shaft of the motor 17 to a driven sprocket mounted on the rotating shaft of the winding shaft 15. Therefore, the rotational driving force of the motor 17 is transmitted to the winding shaft 15 via the chain 16, and when the motor 17 rotates, the winding shaft 15 rotates via the chain 16, controlling the opening and closing of the shutter curtain 12.

The motor 17 is provided with a position detector 172 (see FIG. 2) for detecting its rotational position, i.e., the open/closed position and open/closed state of the shutter curtain 12. This position detector 172 is composed of a pulse-generating rotary encoder or the like. A pulse signal corresponding to the rotation of the motor 17 is output to the control device 18, so that the control device 18 calculates the rotational position of the motor 17 and the position of the tip of the shutter curtain 12 at the opening on the closed side based on the generation status of this pulse.

The control device 18 is configured as a microcomputer, and is supplied with power from the power line AC via the power switching device 20. The control device 18 controls the rotation of the motor 17 based on control signals corresponding to the operation states of the operation buttons on the operation switch 19, signals from the position detection device 172 provided on the motor 17, signals from the protector, etc., and releases the holding mechanism based on the emergency signal BS.

The operation switch 19 has an up (open) button 19A, a stop (stop) button 19B, and a down (close) button 19C as control switches corresponding to the opening, closing, and stopping operations, and outputs a control signal according to the operation state of each of these buttons to the control device 18. Although not shown in FIG. 1, the control device 18 can also be operated by a wireless remote control device.

The emergency signal BS is a 24V signal supplied from an external control room in the event of an emergency such as a fire, and is input to a harm prevention interlocking relay (not shown) in the control device 18. In addition to or instead of the input of the emergency signal BS from the outside, a temperature sensor may be provided inside the shutter case 11 near the opening of the lintel, i.e., the part where the shutter curtain 12 rises and falls. This temperature sensor may be configured to be a high-temperature bimetal thermostat with an automatic reset type B contact whose contacts are always on and open and turn off when the contacts reach a specified temperature (any temperature between 100 and 300 degrees Celsius), and when the contacts are open, a signal indicating that a fire has occurred may be output as a signal equivalent to the emergency signal BS.

The obstacle detector 185 has a transmitter installed at the lower end (seat plate) of the shutter curtain 12. When an obstacle is detected, the detector transmits a detection signal corresponding to the movement of the built-in seat plate switch to the control device 18, and when the seat plate switch returns to its original position due to the removal of the obstacle, a return signal is also transmitted. The transmission of the signal from the transmitter of the obstacle detector 185 to the control device 18 is not limited to a wired system as shown in the figure, but may be a wireless system that operates using a battery as a power source. In addition, a seat plate switch that moves when an obstacle comes into contact with the lower end of the shutter curtain 12 may be provided, and a tape switch installed along the height direction of the guide rails 13 and 14 may be pressed by the force of the seat plate moving when the obstacle comes into contact with the seat plate, or a detection signal may be output from the tape switch to the control device 18 via a wire. In addition, a photoelectric tube, LED, or other light emitting/receiving sensor may be provided at the opening, and an obstacle may be detected without contact by image recognition, etc.

Figure 2 is a diagram explaining the operation of each device in the shutter device shown in Figure 1. The control device 18 controls the motor 17 using power supplied from the power switching device 20, based on signals from the operation switch 19, obstacle sensor 185, and position detection device 172, as well as the emergency signal BS. Note that in Figure 2, the connection relationship of commercial power sources to devices other than the control device 18 is omitted.

The power supply switching device 20 in this example is a manual switch that is manually switched by an operator, and is normally connected to the power line AC side, supplying commercial power supplied from the power line AC to the control device 18. In the event of a power outage of the commercial power supply, the operator manually switches the power supply switching device 20 to the external power conversion device 30 side, and the power supply switching device 20 supplies power supplied from the external power conversion device 30 to the control device 18. The power supply switching device 20 is provided with a connector 20a for connecting the external power conversion device 30 of an emergency external power conversion unit described later.
Note that an automatic switch that detects the power of the commercial power source supplied from the power line AC and automatically switches to the external power conversion device 30 side when the commercial power source is interrupted may be used as the power source switching device 20. Also, when returning from the external power source to the commercial power source again, switching may be performed manually or a switch that automatically switches may be provided.

The external power conversion device 30 of the emergency external power conversion unit described later converts the DC power input from the vehicle battery 40 into three-phase AC power of 200 V, the same voltage as the commercial power supply, and outputs it to the power supply switching device 20. Here, the vehicle battery 40 is a battery mounted on a vehicle such as an electric forklift or an automobile, and typically, a battery with a voltage of 24 or 48 V is used for an electric forklift, 12 V for a gasoline vehicle, and 24 V for a diesel vehicle. Note that in the example shown in Figures 1 and 2, the vehicle battery 40 of an electric forklift is shown, which has a connector 40a as a connection terminal.

In FIG. 1, the opening/closing body device 10 is installed in or near an opening such as an entrance or window, or an internal passage or space in a structure such as a house, building, factory, warehouse, garage, or other building, so that vehicles such as forklifts and automobiles can easily approach. Vehicles such as electric forklifts and automobiles are equipped with a battery, and by utilizing the on-board battery 40, it is possible to easily perform the opening and closing operation of the opening/closing body during a power outage without using an emergency power supply device or generator as described in Patent Document 1.

The on-board battery 40 does not need to be removed from a vehicle such as an electric forklift or an automobile; the vehicle equipped with the on-board battery 40 can be moved close to the opening/closing body device 10 and connected to the external power conversion device 30 with the on-board battery 40 still attached to the vehicle. The on-board battery 40 as an external power source is not limited to electric forklifts and automobiles, but also includes batteries mounted on other vehicles that can run around or inside openings such as entrances and windows, or internal passageways and spaces in structures such as buildings, including houses, buildings, factories, warehouses, and garages.

When using the on-board battery of a gasoline or diesel vehicle, over-discharging of the on-board battery (so-called "dead battery") can be avoided by keeping the engine running in an idling state while the shutter curtain 12 of the opening/closing device 10 is being opened or closed.

Figure 3 is a diagram showing an example of the circuit configuration of the external power conversion device of the emergency external power conversion unit according to the present invention. In this example, a common external power conversion device 30 is provided regardless of the voltage (48, 24 or 12 V) of the vehicle battery 40, and manual switching is performed according to the voltage of the vehicle battery 40. The external power conversion device 30 is configured to include a circuit breaker 31, a DC/AC conversion circuit 32, an input voltage changeover switch 33, an input voltage detector 34, and an output voltage detector 35. The positive terminal of the vehicle battery 40 is connected to the circuit breaker 31 as a DC input (+), and the negative terminal is connected to the circuit breaker 31 as a DC input (-). The circuit breaker 31 supplies the input voltage to the DC/AC conversion circuit 32, and cuts off the input current from the vehicle battery 40 when the input current reaches a predetermined cutoff value.

In the example of FIG. 3, the circuit breaker 31 is provided only on the input side of the external power conversion device 30, but a circuit breaker may also be provided on the output side of the external power conversion device 30. By providing the circuit breaker 31 on the input side of the external power conversion device 30, even if the input current from the vehicle battery 40 is abnormally large, the input current is cut off, preventing the risk of malfunction. Also, by providing a circuit breaker on the output side of the external power conversion device 30, the risk of an abnormally large current being supplied to the power supply switching device 20 is avoided even if the external power conversion device 30 breaks down.

Figure 4 is a diagram showing an example of the configuration of a DC/AC conversion circuit. The DC/AC conversion circuit 32 includes a switching circuit 32a, a voltage switching circuit 32b, a transformer 32c, a rectifier circuit 32d, an inverter circuit 32e, a filter circuit 32f, and a switching control/driver circuit 32g. The switching circuit 32a turns on/off the primary current supplied to the primary input terminal of the transformer 32c according to the control of the switching control/driver circuit 32g.

The transformer 32c has multiple primary input terminals for different input voltages of 48, 24, or 12 V. A voltage switching circuit 32b is provided between the switching circuit 32a and the transformer 32c. The operating state of the input voltage switching switch 33 is transmitted to the voltage switching circuit 32b via the switching control/driver circuit 32g. The voltage switching circuit 32b switches the connection of the vehicle battery 40 to the primary input terminal of the transformer 32c via the circuit breaker 31 and the switching circuit 32a according to the operating state of the input voltage switching switch 33. By switching the voltage switching circuit 32b, the transformer 32c changes its transformation ratio according to the voltage of the vehicle battery 40, and transforms the primary voltage of 48, 24, or 12 V to a secondary voltage of 200 V.

The input voltage changeover switch 33 is a manual switch that allows the operator to manually change over the voltage changeover circuit 32b in the DC/AC conversion circuit 32 according to the voltage of the vehicle battery 40. Depending on the changeover of the input voltage changeover switch 33, the cutoff value of the circuit breaker 31 and the switching control operation of the switching control/driver circuit 32g in the DC/AC conversion circuit 32 can also be switched for each voltage of 48, 24 or 12 V.

The rectifier circuit 32d rectifies the secondary current of the transformer 32c. The inverter circuit 32e performs frequency conversion on the secondary current of the transformer 32c rectified by the rectifier circuit 32d based on the driving of the switching control/driver circuit 32g. The filter circuit 32f includes a sine wave filter and a noise filter, and filters the AC current output from the inverter circuit 32e to output it as a three-phase AC output.

By providing a transformer 32c with multiple primary input terminals for different input voltages and a voltage switching circuit 32b that switches the connection of the vehicle battery 40 to the primary input terminal of the transformer 32c, it becomes possible to use any one of multiple vehicle batteries with different voltages, improving convenience.

In FIG. 3, instead of the manual input voltage changeover switch 33, an automatic input voltage changeover device may be provided that detects the voltage value of the vehicle battery 40 and automatically switches the connection to the primary input terminal of the transformer 32c in the DC/AC conversion circuit 32.

Note that FIG. 3 shows an example of an external power conversion device 30 that converts the voltage of a DC vehicle battery 40 (external power source) to the voltage of an AC commercial power source, but if the equipment to be supplied is composed of DC electrical equipment (such as a motor), the external power conversion device does not need to perform DC-AC conversion.

Figure 5 is a diagram showing an example of an emergency external power conversion unit according to the present invention. The emergency external power conversion unit 60 is configured to include an external power conversion device 30, a DC cable 61, an AC cable 62, a first cable harness 63, a portable case 70, an instruction for use display 79, and a cable storage device 80. Note that in this example, the external power conversion device 30 is not shown in Figure 5 because it is stored under the cable storage device 80 in the portable case 70 and cannot be seen.

The DC cable 61 is, for example, a cable with a connector having a connector 1. In this example, the connector 1 of the DC cable 61 is connected to a connector 40a serving as a connection terminal of an on-board battery 40 mounted on an electric forklift, thereby connecting the external power conversion device 30 to the on-board battery 40. The AC cable 62 is, for example, a cable with a connector having a connector 2. In this example, the connector 2 of the AC cable 62 is connected to the connector 20a of the power supply switching device 20, thereby connecting the external power conversion device 30 to the power supply switching device 20 of the opening/closing body device 10.

The portable case 70 houses the external power conversion device 30, the DC cable 61, the AC cable 62, the first cable harness 63, the usage instruction display 79, and the cable storage device 80, which can be removed from the portable case 70 when in use. However, the external power conversion device 30 and the cable storage device 80 do not need to be removed from the portable case 70 when in use.
By using the portable case 70, the external power conversion device 30, the DC cable 61, and the AC cable 62 can be easily carried together. Note that the cable storage device 80 may be attached to the outside of the portable case 70, instead of being stored inside the portable case 70. Also, the first cable harness 63 may be stored separately from the portable case 70, instead of being stored inside the portable case 70.

According to the emergency external power conversion unit 60 of this embodiment, a disaster prevention device for use during a power outage can be provided at low cost, which can easily supply power to the power supply switching device 20 of the opening/closing body device 10 using the vehicle battery 40 during a power outage. Furthermore, since the emergency external power conversion unit 60 includes the external power conversion device 30, the DC cable 61, and the AC cable 62, once the vehicle battery 40 and the emergency external power conversion unit 60 are prepared, the necessary connection work can be performed immediately.

The portable case 70 has a case body 70a with an opening on the top surface, and a lid 70b that covers the opening of the case body 70a. The lid 70b is attached to the case body 70a so that it can be opened and closed. Fig. 6(a) is a side view of the portable case, and Fig. 6(b) is a bottom view of the portable case. A handle 71a is provided on the longer side of the case body 70a of the portable case 70. The handle 71a is attached so that it can be rotated 90 degrees vertically in the drawing of Fig. 6(a) and rises up. In addition, a handle 71b is provided on the shorter side of the case body 70a. Providing the handles 71a and 71b on the portable case 70 makes it easier to carry and transport the portable case 70.

6(a) and (b), four wheels 72 are attached to the side of the case body 70a of the portable case 70 opposite to the side on which the handle 71b is provided, for rolling the case on the floor. In addition, four feet 73 are attached to the bottom of the case body 70a. These feet 73 support the portable case 70 horizontally when the portable case 70 is placed on the floor with the lid 70b facing upward. In addition, a handle 74 is attached from near the center of the bottom of the case body 70a to the top of the drawing, for holding when rolling the case on the floor. By providing the wheels 72 and handle 74 to the portable case 70, the portable case 70 can be rolled on the floor, making it extremely easy to transport the emergency external power conversion unit 60.

The handle 74 is composed of an upper handle part 74a, a lower handle part 74b, and a grip part 74c, and the upper handle part 74a is configured to be slid in the direction of the arrow shown in FIG. 6(b) and stored in the lower handle part 74b. By storing the upper handle part 74a in the lower handle part 74b, when the handle 74 is not in use, the upper handle part 74a and the grip part 74c do not protrude from the bottom surface of the case body 70a and get in the way of work.

Figure 7(a) is an example of an external view of an external power conversion device, a DC cable, an AC cable, and a first cable harness. In Figure 7(a), the DC cable 61 of this example has a connector 1 at one end for connecting to the connector 40a of the on-board battery 40 of the forklift. The AC cable 62 of this example has a connector 2 at one end for connecting to the connector 20a provided on the power supply switching device 20 of the opening/closing body device 10. The connector 2 is provided with a cap 2a for covering and protecting the joint when not in use.

Since the DC cable 61 has a connector 1 for connecting to the connector 40a of the vehicle battery 40, and the AC cable 62 has a connector 2 for connecting to the connector 20a of the power supply switching device 20 of the opening/closing body device 10, the work of connecting the external power supply conversion device 30 to the vehicle battery 40 and the work of connecting the external power supply conversion device 30 to the power supply switching device 20 of the opening/closing body device 10 are facilitated.
Furthermore, under normal circumstances, the connector 2 of the AC cable 62 can be removed from the connector 20a of the power supply switching device 20 and the emergency external power supply conversion unit 60 can be stored in another storage location, and in the event of a commercial power outage, the connector 2 of the AC cable 62 of the emergency external power supply conversion unit 60 brought from the storage location can be connected to the connector 20a of the power supply switching device 20, making it possible to supply the necessary power from the external power supply conversion device 30 to the power supply switching device 20 of the opening/closing body device 10 without performing electrical work that requires a licensed electrician.

In FIG. 7(a), the other ends of the DC cable 61 and the AC cable 62 in this example are each pre-connected to the external power conversion device 30. Since the other ends of the DC cable 61 and the AC cable 62 are each pre-connected to the external power conversion device 30, when using the emergency external power conversion unit 60, there is no need to reconnect the DC cable 61 and the AC cable 62 to the external power conversion device 30, and the minimum required work can be performed quickly.

In FIG. 5, in this example, the cable storage device 80 is stored in the case body 70a of the portable case 70. FIG. 7(b) is an example of an external view of the cable storage device. The cable storage device 80 is configured to include a base 81, multiple support posts 82, a first connector storage device 83, and a second connector storage device 84. A plurality of cylindrical support posts 82 for winding the DC cable 61 and the AC cable 62 are attached to the base 81. In this example, four support posts 82 are provided, and the first connector storage device 83 and the second connector storage device 84 are arranged in the space between the four support posts 82. The first connector storage device 83 and the second connector storage device 84 are, for example, made of flexible tape with hook-and-loop fastener, and are attached to the base 81.

The number of pillars 82 is not limited to four, and three or less or five or more pillars 82 may be provided. Furthermore, the pillars 82 do not necessarily have to be cylindrical, and may have a shape without sharp corners so that the points where the wound DC cable 61 and AC cable 62 come into contact do not damage the DC cable 61 and AC cable 62.

Figure 8(a) is an external view of a cable storage device with an AC cable wound around it. The AC cable 62 is wound around the outside of the four pillars 82, and the connector 2 of the AC cable 62 is fixed to the base 81 using a second connector storage device 84. Figure 8(b) is an external view of a cable storage device with a DC cable further wound around it. The DC cable 61 is wound around the outside of the four pillars 82, and the connector 1 of the DC cable 61 is fixed to the base 81 using a first connector storage device 83. Note that the order in which the DC cable 61 and the AC cable 62 are wound is not limited to the above-mentioned order, and they may be wound in any order.

By winding the DC cable 61 and the AC cable 62 around the multiple pillars 82 of the cable storage device 80, storing the connector 1 of the DC cable 61 in the connector storage device 83, and storing the connector 2 of the AC cable 62 in the connector storage device 84, the DC cable 61 and the AC cable 62 can be stored in and removed from the portable case 70 extremely easily, and entanglement and twisting of the DC cable 61 and the AC cable 62 are suppressed, thereby avoiding damage and breakage of the DC cable 61 and the AC cable 62.

In FIG. 5, the inside of the lid 70b of the portable case 70 is provided with an instruction manual 79 that describes how to use the external power conversion device 30, the DC cable 61, and the AC cable 62. FIG. 9 is a diagram showing an example of an instruction manual. An instruction manual that describes how to use the related equipment of the opening/closing body device 10 has traditionally been provided in the form of a booklet or computer software, but it is desirable to store it in an easy-to-find location in preparation for emergencies such as power outages. By providing an instruction manual that describes how to use the external power conversion device 30, the DC cable 61, and the AC cable 62 on the portable case 70, it becomes possible to easily use the external power conversion device 30.

The usage indication 79 may include not only the usage of the external power conversion device 30, the DC cable 61, and the AC cable 62, but also other information such as the usage of the first cable harness 63 described below, necessary precautions, and product specifications. The usage indication 79 may be provided on the surface of the portable case 70, not only on the inside of the lid 70b of the portable case 70.

In FIG. 1, the connector 40a serving as the connection terminal of the on-board battery 40 of the electric forklift comes in two sizes, large and small, with the large-sized connector primarily being used for the on-board batteries of large electric forklifts and the small-sized connector primarily being used for the on-board batteries of small electric forklifts. The large-sized connectors and the small-sized connectors are not compatible, and so when using the on-board battery 40 of an electric forklift as an external power source, it was previously necessary to prepare multiple DC cables with connectors of each size.

In Fig. 7, a first cable harness 63 has a small-sized connector 3 attached to one end of a pair of positive and negative cables, and a large-sized connector 4 attached to the other end. Fig. 10 is a diagram for explaining the configuration and an example of use of the first cable harness according to one embodiment of the present invention.
Fig. 10(a) is a top view of the large-sized connector 4, and Fig. 10(b) is a side view of the same. The connector 4 is configured to include a connector body 4a, a joint base 4b, two convex joints 4c, and two concave joints 4d. In Fig. 10(a), the joint base 4b has a thickness approximately half that of the connector body 4a, and two convex joints 4c are provided on the upper surface of the joint base 4b. On the other hand, in Fig. 10(b), two concave joints 4d are provided on the inside of the joint base 4b. Each convex joint 4c and each concave joint 4d is provided with an electrode. The configuration of the small-sized connector 3 is the same as that of the large-sized connector 4.

The configuration of the connector 40a provided on the on-board battery 40 of the electric forklift and the configuration of the connector 1 of the DC cable 61 are the same as the configuration of the connector 4 described above. Therefore, there is no distinction between male and female connectors 1, 3, 4, and 40a, and when connecting connectors of the same size, one connector is turned upside down relative to the other connector and the convex joint and concave joint of each connector are engaged. The electrode of the convex joint of one engaged connector comes into contact with the electrode of the concave joint of the other connector, connecting the connectors.

Figure 10(c) shows a case where the connector 40a of the on-board battery 40 of the electric forklift is a large-sized connector, and the connector 1 of the DC cable 61 is a small-sized connector. In this case, the large-sized connector 4 at one end of the first cable harness 63 is engaged with the large-sized connector 40a of the on-board battery 40, and the small-sized connector 3 at the other end of the first cable harness 63 is engaged with the small-sized connector 1 of the DC cable 61.

Conversely, FIG. 10(d) shows a case where the connector 40a of the on-board battery 40 of the electric forklift is a small-sized connector, and the connector 1 of the DC cable 61 is a large-sized connector. In this case, the small-sized connector 3 at one end of the first cable harness 63 is engaged with the small-sized connector 40a of the on-board battery 40, and the large-sized connector 4 at the other end of the first cable harness 63 is engaged with the large-sized connector 1 of the DC cable 61.

When the size of the connector 40a of the vehicle battery 40 and the size of the connector 1 of the DC cable 61 are different, the connector 40a of the vehicle battery 40 and the connector 1 of the DC cable 61 can be connected via the first cable harness 63. Therefore, it is sufficient to prepare only one DC cable 61 having a connector of either large or small size, eliminating the need to prepare multiple DC cables 61 having connectors of each size, resulting in an inexpensive and compact configuration.

11 is a diagram showing a first cable harness according to another embodiment of the present invention. In this embodiment, a connector 4' of a first cable harness 63' that engages with a connecting terminal of a battery is a booster clip.
By using a booster clip as the connector 4' that engages with the battery connection terminal of the first cable harness 63', it becomes possible to use a battery having a terminal (electrode) other than a connector as the connection terminal, thereby increasing versatility.

For example, this connector 4' (booster clip) is engaged with the terminal (electrode) of an on-board battery as an external power source mounted on an automobile or motorcycle, or with the terminal (electrode) of an automobile engine starter, and the connector 3 at the other end is connected to the connector 1 of the DC cable 61. In this case, when the size of the connector 3 differs from the size of the connector 1 of the DC cable 61, the above-mentioned first cable harness 63 can also be used.
The external power conversion device 30 can be used to convert power input from an on-board battery of an automobile or motorcycle, or an engine starter for an automobile, into power with the same voltage as that of a commercial power source.

In this embodiment, a second cable harness is further provided for connecting the AC cable 62 to other equipment to be supplied, which is not shown in FIG. 7(a). FIG. 12 is a diagram showing a second cable harness according to an embodiment of the present invention. The second cable harness 64 has a connector 5 at one end that engages with the connector 2 of the AC cable 62. The second cable harness 64 has a general-purpose AC or DC outlet 6 at the other end. The second cable harness 64 may be housed in the carrying case 70, similar to the first cable harnesses 63 and 63', or may be stored separately from the carrying case 70.

By providing the second cable harness 64 with a general-purpose AC or DC outlet 6, when there is no commercial power source, such as during a power outage, the second cable harness 64 can be used to supply power to equipment other than the opening/closing device 10 that has a general-purpose outlet plug, such as a lighting device, a temperature control device, a heater, a refrigerator, etc., thereby increasing versatility.
In addition, the general-purpose AC outlet is not limited to a three-phase outlet, but may be a single-phase outlet depending on the outlet plug used in the facility to be supplied. For example, a single-phase 200V outlet plug is used in a switchgear device equipped with an emergency power supply device in order to have a low-cost configuration.

In FIG. 5, when the DC cable 61 and the AC cable 62 are removed from the opening of the case body 70a of the portable case 70, if the lid 70b of the portable case 70 is not fixed in the open state, the lid 70b may close accidentally, and the hand or the DC cable 61 and the AC cable 62 may be pinched between the case body 70a and the lid 70b. In particular, if the outer surfaces of the case body 70a and the lid 70b are made of a hard material such as aluminum, there is a risk of injury to the hand or damage to the DC cable 61 and the AC cable 62. Therefore, in this embodiment, a stopper device that keeps the lid 70b open is provided on the portable case 70.

Figure 13 is a diagram illustrating a stopper device according to one embodiment of the present invention. In Figure 13(a), a stopper device 75 shown within the dashed line on the right side of the arrow A is attached to the portable case 70 shown in dashed line on the left side of the arrow A in a state where it stands up approximately perpendicular to the drawing. The stopper device 75 is composed of an upper arm 75a, a lower arm 75b, a connecting device 75c, an upper mounting device 75d, a lower mounting device 75e, and a moving piece 75f. Each of these members is formed by cutting, for example, a plate-shaped metal plate by laser processing or the like. The moving piece 75f is formed into a U-shaped cross section by pressing or the like.

The upper arm 75a is rotatably attached to the connector 75c and the upper attachment 75d. The lower arm 75b is rotatably attached to the connector 75c and the lower attachment 75e. The connector 75c may be integrated with the upper arm 75a or the lower arm 75b, so that the upper arm 75a and the lower arm 75b rotate around the connector 75c.
The upper attachment 75d is fixed to the inner surface of the lid 70b, and the lower attachment 75e is fixed to the inner wall of the case body 70a. The moving piece 75f sandwiches the plate-shaped upper arm 75a between two opposing surfaces of the U-shaped cross section, and is attached to a long hole provided in the upper arm 75a so as to be able to slide up and down. A spring is attached inside the moving piece 75f, which has a U-shaped cross section, to bias the moving piece 75f downward. When the lid 70b is opened, the lower end of the moving piece 75f fits into a concave cutout portion 75g provided in the lower arm 75b, and the open state of the lid 70b is maintained.

When closing the lid 70b, the moving piece 75f is pushed upward in the direction indicated by arrow B against the force of the spring, the lower end of the moving piece 75f is removed from the concave cutout portion 75g of the lower arm 75b, and the lid 70b is closed while releasing the open state of the lid 70b. When the lid 70b is closed, the upper arm 75a rotates in the direction of arrow C, and the lower arm 75b rotates in the direction of arrow D, and the stopper device 75 is folded into the state shown within the dashed line in FIG. 13(b).

By providing a stopper device 75 that holds the lid 70b in an open state, there is no risk of a hand or the DC cable 61 and AC cable 62 being pinched between the case body 70a and the lid 70b. The stopper device 75 is provided with an upper arm 75a and a lower arm 75b as support members that support the lid 70b, and a moving piece 75f that fixes the upper arm 75a and the lower arm 75b and releases the fixation between the upper arm 75a and the lower arm 75b. This allows the lid 70b to be released from the open state and closed without the risk of fingers being pinched by the stopper device 75. At this time, since the stopper device 75 is provided only at one side between the case body 70a and the lid 70b, one hand can be used to operate the moving piece 75f while the other hand is used to close the lid 70b.

Metal fittings that hold lids, doors, etc. at a certain angle, such as the stopper device of this embodiment, are generally called "stays." Normally, upward-opening stays for canopies are attached so that the rotating shaft (corresponding to the connector 75c) moves away from the operator (in the depth direction) when folded so as not to get in the way. In contrast, the stopper device 75 of this embodiment is attached so that the rotating shaft (connector 75c) moves toward the operator (toward the operator) when folded, so that the moving piece 75f is positioned in front of the operator, making it easier for the operator to operate the moving piece 75f.

In FIG. 3, the input voltage detector 34 of the external power conversion device 30 includes a DC voltmeter and a display unit, detects the magnitude of the DC voltage input from the circuit breaker 31 to the DC-AC conversion circuit 32, and displays the magnitude of the detected voltage on the display unit. In addition, the output voltage detector 35 of the external power conversion device 30 includes an AC voltmeter and a display unit, detects the magnitude of the AC voltage output from the DC-AC conversion circuit 32, and displays the magnitude of the detected voltage on the display unit.

When a fault occurs in the input or output system of the external power conversion device 30, it is difficult to identify the location of the fault, and measuring the voltage of the input and output lines using a measuring device such as a tester is difficult in an emergency such as a disaster or power outage. The input voltage detector 34 is used to detect and display the magnitude of the DC voltage input to the external power conversion device 30, and the output voltage detector 35 is used to detect and display the magnitude of the AC voltage output from the external power conversion device 30, making it easier to identify the location of the fault and improving maintenance convenience. For the display units of the input voltage detector 34 and the output voltage detector 35, for example, a 7-segment numeric display or a liquid crystal display device can be used to improve visual recognition.

Figure 14 is a diagram explaining the display of the input voltage detector and output voltage detector of the external power conversion device and the location of the failure. Figure 14 (a) is a diagram showing the power supply path from the vehicle battery 40 to the control device 18 of the opening and closing body device 10. Note that the circuit breaker 31 in the external power conversion device 30 and the power switching device 20 are omitted in Figure 14 (a). In the following, the voltage of the vehicle battery 40 is assumed to be, for example, a DC voltage of 48 V. The DC/AC conversion circuit 32 is designed to maintain the output of an AC voltage of 200 V until the reduction rate of the input voltage reaches -20%, output an AC voltage of 100 V when the reduction rate of the input voltage reaches -25%, and output a voltage of 0 V when the reduction rate of the input voltage reaches -30%.

14(b), if the output voltage detector 35 indicates 200V until the input voltage reduction rate reaches -20% based on the indication of the input voltage detector 34, it can be determined that there is no fault in the in-vehicle battery 40 or the DC-AC conversion circuit 32. On the other hand, if the output voltage detector 35 indicates less than 200V at this time, it can be determined that the fault is in the DC-AC conversion circuit 32.
When the input voltage reduction rate is −25% based on the display of the input voltage detector 34, if the display of the output voltage detector 35 is 100 V, it can be determined that the fault is in the on-board battery 40. On the other hand, if the display of the output voltage detector 35 is less than 100 V at this time, it can be determined that the fault is in the on-board battery 40 and the DC/AC conversion circuit 32.
When the input voltage reduction rate is -30% based on the display of the input voltage detector 34, it can be determined that the fault is at least in the vehicle battery 40. At this time, the display of the output voltage detector 35 becomes 0 V, but it cannot be determined whether the DC/AC conversion circuit 32 is included in the faulty part.
Furthermore, if it can be determined that there are no faults in the on-board battery 40 and the DC/AC conversion circuit 32, but the opening/closing body device 10 does not operate normally, it can be determined that there is a malfunction in the devices subsequent to the control device 18.

According to the embodiment described above, an emergency external power supply conversion unit 60 for an opening/closing body device is provided, which can easily supply power from the vehicle battery 40 to the opening/closing mechanism (motor 17) of the opening/closing body device 10.
In addition, since the power supply switching device 20 of the opening/closing body device 10 supplies power from the commercial power supply to the control device 18 when there is a commercial power supply, an emergency external power supply conversion unit 60 is provided for the opening/closing body device that operates using the commercial power supply when there is a commercial power supply.

In the above embodiment, a shutter curtain that is unrolled in a vertical lifting manner has been described as an example, but the invention can be applied to shutter-shaped opening and closing members that are unrolled in a lateral or horizontal manner. In addition, the invention can also be applied to opening and closing body devices such as shutter devices, window shutter devices, blind devices, roller screen devices, drapery devices, sliding door devices, movable partition devices, sliding door devices, hinged door devices, folding door devices, gate devices, awning devices, and waterproof board devices.

Furthermore, the emergency external power conversion unit of the present invention can be used not only in opening and closing devices, but also in various devices and equipment to supply power from an external power source when there is no commercial power supply, such as during a power outage.
In the above embodiment, an inverter circuit that converts DC to AC has been described as an example, but the inverter also includes a converter circuit that converts DC to DC, AC to DC, or AC to AC.

1, 2, 3, 4, 5...connector 4'...connector (booster clip)
6...Outlet 10...Opening and closing body device 11...Shutter case 12...Shutter curtain 13, 14...Guide rail 15...Winding shaft 16...Chain 17...Motor 172...Position detection device 18...Control device 185...Obstacle detector 19...Operation switch 19A...Up (open) button 19B...Stop (stop) button 19C...Down (close) button 20...Power supply switching device 20a...Connector 30...External power supply conversion device 31...Circuit breaker 32...DC/AC conversion circuit 33...Input voltage switching switch 34...Input voltage detector 35...Output voltage detector 40...On-board battery 40a...Connector 60...External power supply conversion unit 61...DC cable (first cable)
62...AC cable (second cable)
63, 63'...First cable harness 64...Second cable harness 70...Portable case 70a...Case body 70b...Lid 71a, 71b...Handle 72...Wheels 73...Footrest 74...Handle 75...Stopper device 79...Indication of usage 80...Cable storage device 81...Pedestal 82...Support 83...First connector storage device 84...Second connector storage device

Claims (6)

a conversion means connected to a battery as an external power source having a connection terminal and converting power input from the battery into power having the same voltage as that of a commercial power source;
a first cable having a connector means at one end thereof for connecting to the connection terminal of the battery, the first cable connecting the conversion means and the battery;
a second cable connecting the conversion means and a facility supplied with commercial power;
a first cable harness means having at one end a connector means configured to engage with said connection terminal of said battery and at the other end a connector means configured to engage with said connector means of said first cable;
the conversion means includes a transformer having a plurality of primary input terminals for different input voltages, a voltage switching circuit for switching the connection of the battery to the primary input terminals of the transformer, and an input voltage switching switch for switching the voltage switching circuit in response to the voltage of the battery;
When the shape of the connection terminal of the battery and the shape of the connector means of the first cable are different and cannot be fitted together , the connection terminal of the battery and the connector means of the first cable are connected via the first cable harness means,
An emergency external power conversion unit, characterized in that the power converted by the conversion means is supplied to the power-receiving facility. In the emergency external power conversion unit described in claim 1, the conversion means is connected to an on-board battery as the external power source mounted on an electric forklift, and converts the power input from the on-board battery into power with the same voltage as the commercial power source. 3. The emergency external power conversion unit according to claim 1 , wherein the second cable has a connector means at one end thereof for connecting to a connector means provided in the power-receiving facility,
An emergency external power supply conversion unit, characterized in that it is provided with a second cable harness means having at one end a connector means shaped to engage with the connector means of the second cable, and at the other end a general-purpose outlet for AC or DC. 4. The emergency external power conversion unit according to claim 3 , wherein the other end of the first cable and/or the second cable is pre-connected to the conversion means. 5. The emergency external power conversion unit according to claim 1 , further comprising a portable case for accommodating the conversion means, the first cable, and the second cable,
The portable case has a case body having an access port, a lid covering the access port of the case body, and a stopper means for holding the lid in an open position, and the stopper means has a support member for supporting the lid and a moving piece for fixing the support member and releasing the fixation of the support member, characterized in that the emergency external power supply conversion unit. 6. The emergency external power conversion unit according to claim 1, 2, 3, 4, or 5 , wherein the conversion means has an input voltage detection means for detecting and displaying a magnitude of an input voltage, and an output voltage detection means for detecting and displaying a magnitude of an output voltage.

Images