JP2007022803A - Electric work drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To turn on a lamp immediately when current carrying is shut off or power failure occurs by utilizing an electric work drum because it is impossible to see the surroundings during work at site without illumination and during illumination at night if power failure occurs, thereby causing trouble, and it is very inconvenient to put objects in order after the work ends if it is dark. <P>SOLUTION: A charging battery and a charging circuit for turning on the lamp for safety are provided in the electric work drum by attaching the lamp for safety to the drum. Consequently, when supply of commercial alternating current power supply is shut off, the lamp is immediately lit by the charging battery. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric drum, and more particularly to an apparatus in which a plug inserted into a cable is pulled out or a lamp provided on the electric drum is automatically turned on during a power failure while supplying electric power from a commercial AC power source.

  2. Description of the Related Art Conventionally, electric drums are used for various purposes such as electrical work and construction work using lighting fixtures and electric tools. Various ideas have been made to use these electric drums efficiently and safely.

In order to efficiently draw out and wind the cord, there is a drum whose rotation is controlled by providing a support arm and a guide portion on the frame of the cord drum. (For example, see Patent Document 1)
Some of the plurality of outlets provided on the electric drum are provided with a transformer for transforming the power supply voltage. (For example, see Patent Document 2)
In addition, there are earth leakage breakers and grounding terminals in the electric drum, and if the grounding terminal is not grounded, the earth leakage breaker can be turned off and the power supply from the outlet can be prohibited. is there. (For example, see Patent Document 3)

  Japanese Patent Laid-Open No. 53-112478   Japanese Utility Model Publication No. 2-17924   Japanese Utility Model Publication No. 6-38053

  However, the breaker may be turned off or the plug may be disconnected from the outlet of the commercial AC power source when the conventional electric drum is used for construction work, electrical work, temporary lighting, etc. In many cases, troubles occur due to darkness caused by power failure.

  In view of the above problems, the present invention intends to prevent trouble by immediately turning on the safety lamp and brightening the surroundings when a power failure occurs due to de-energization when the supply from the commercial AC power supply is cut off. .

  In order to solve the above problems, the present invention attaches a power supply outlet to the electric tool electrically connected to the mounting plate of the front plate of the rotatable electric drum, and attaches a safety lamp and a lamp switch, Equipped with a rechargeable battery and a safety light circuit with a charging circuit for lighting the safety lamp. Therefore, when working, pull out the cable from the electric drum, and plug the plug into the outlet of the commercial AC power supply. It is characterized by doing.

  Further, in order to make the safety light lamp detachable from the electric drum with a single touch, a magnet part is provided at the rear part of the exterior of the safety light lamp so that the magnet part can be attracted to the mounting part of the electric drum. Is provided.

  In addition, an on / off switch is provided so that when the electrical drum is disconnected from the commercial AC power supply by unplugging the electrical outlet or turning off the breaker, the safety light will turn on but turn off depending on the circumstances. Yes. Now when the switch is turned off, the light is turned off, and when power is supplied from a commercial AC power source to use the electric drum again, the power failure detection circuit detects and controls the switch circuit so that the switch automatically returns and turns on. It is characterized by returning to a normal function.

  Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect of the invention, since the electric drum is provided with the charging function and the safety light lamp, the following effects can be obtained by always carrying it.
The electric drum is used to light up immediately when it cannot be supplied from a commercial AC power source during dark construction sites or as a temporary lighting at night, so the situation can be secured by seeing the surroundings. Therefore, trouble can be prevented to a minimum.
Also, in a dark situation, after the work is completed, the safety light is turned on even when it is disconnected from the commercial AC power source, so that the organization can be efficiently organized by seeing the feet.

  According to the invention described in claim 2, it is possible to change the illuminance range by changing the removal height or changing the direction as necessary, and the field of view can be widened and used as efficient illumination. is there.

  According to the third aspect of the present invention, when the commercial AC power supply is cut off to the electric drum, the safety light lamp is turned on, but when it is not necessary, the safety light switch is turned off and turned off. In this state, when the electric drum is used again, if the power is supplied from the commercial AC power supply, the safety light switch automatically returns to the on state, thereby providing a safety light lamp that can always be handled in perfect condition. Can do.

Embodiments of the present invention will be described with reference to the drawings.
A first embodiment of the present invention will be described. FIG. 1 is an external view of a first embodiment of the present invention. FIG. 2 is a partially broken side view. FIG. 3 is a circuit diagram of a security lamp lighting circuit with a charging circuit and its surroundings.
In this figure, 1 is the whole electric drum, 2 is a safety lamp, which is turned on at the time of power failure, and can be turned on and off by 10 service lamp switches even during energization. A lighting switching circuit 3 automatically switches between energization and power failure. 4 is a switching means, and when a power failure (shut off of supply of commercial AC power supply 15) is detected by the power failure detection circuit 7, the circuit is opened so that the current of the rechargeable battery 8 flows. Lights up, but can be turned off by turning off the lamp switch if lighting is not necessary. 9 is a plug. Reference numeral 11 denotes a service lamp circuit that operates while 15 commercial AC power supplies are energized. Reference numeral 12 denotes a rectifier circuit. Reference numeral 24 denotes an outlet for supplying the commercial AC power supply 15 to an electric tool or the like. Reference numeral 14 denotes an LED of an energization indicator lamp for notifying that the commercial AC power supply 15 is in an energized state when the commercial AC power supply 15 is supplied. Reference numeral 51 denotes an alarm switch that works in conjunction with the lamp switch 5. When the lamp switch 5 is turned off, the alarm switch 51 contacts the contact on the a side from the b side. An alarm buzzer 13 notifies that the lamp switch 5 is off. Reference numeral 20 denotes a carrying handle. Reference numeral 21 denotes a support leg of the electric drum. Reference numeral 22 denotes a rotary operation knob.

Therefore, when the first embodiment of the present invention is used, when the plug 9 of the cable of the electric drum 1 is connected to the outlet on the commercial AC power supply 15 side, the energization indicator lamp 14 flows the current R2 and the LED emits light. By representing the energized state, the outlet 24 is in a state where the power of the electric tool to be used can be supplied.
On the other hand, a current flows through the fuse to supply power to the safety light lighting circuit. Therefore, through the rectifier circuit 12, the power failure detection circuit 7 detects energization, and the charging circuit 6 supplies the charging current to the rechargeable battery 8 for charging. When charging is completed, the camera enters a standby state. Here, when the supply from the commercial AC power supply 15 is cut off or a power failure occurs, the power failure detection circuit 7 detects the power failure and controls the switching means 4 to switch the current of the rechargeable battery 8 through the lamp switch 5 to turn on. Flowing into the circuit 3 starts discharging as a power source of the rechargeable battery 8 and the security lamp 2 is turned on. When the commercial AC power supply 15 is supplied again, the power failure detection circuit 7 detects energization, the switching means 4 stops discharging the rechargeable battery 6 and turns off the security lamp 2.
Further, when the safety light lamp 2 is lit when a power failure occurs and the lighting by lighting becomes unnecessary, the lamp can be turned off by turning off the lamp switch 5. At this time, since the lamp switch 5 and the alarm switch 51 are interlocked, the terminal of the alarm switch 51 is switched from the b side to the a side. In this state, when the commercial AC power supply 15 is supplied to the electric drum 1 again and is energized, a current flows through the alarm buzzer 13 via R1 to generate an alarm sound. This informs that the lamp switch 5 is in the OFF state. Therefore, when the lamp switch 5 is turned on, the alarm sound is stopped and a normal safety light circuit is formed, and the safety lamp 2 is turned on again in the event of a power failure.
Further, by turning on / off the service lamp switch 10 while the commercial AC power supply 15 is energized, the security lamp 5 can be turned on / off via the service lamp circuit 11.
Note that the alarm buzzer 13 is changed to an LED and a buzzer sound is turned on to prompt the on-return.

The second embodiment of the present invention will be described. FIG. 4 is a front view in which the security lamp is made detachable and removed.
In the figure, reference numeral 17 denotes a lamp assembly. Reference numeral 19 denotes a lamp assembly mounting portion for attaching the lamp assembly 17. In order to allow the lamp assembly 17 and the lamp assembly mounting 19 to be easily mounted, 18 magnets are provided on the back side of the lamp assembly 17 and are attracted to the metal part of the lamp assembly mounting 19. Reference numeral 22 denotes a handle of the lamp assembly 17.

  Therefore, as for the use of the second embodiment, as in the first embodiment of the above item, when the commercial AC power supply 15 is energized using the electric drum, if the power is cut off and a power failure occurs, a safety lamp 2 lights up. At this time, when it is desired to change the position of the illumination to obtain brightness, it is possible to illuminate a necessary place by holding the handle 22 of the lamp assembly 17 incorporating the security lamp 2 and extending the lamp cord 23. Therefore, the use of lighting can be expanded.

The third embodiment of the present invention will be described. Reference numeral 16 denotes an automatic return switch circuit which is replaced and connected to the connection portion of the manually operated lamp switch 5 in the circuit configuration diagram of the first embodiment.
The automatic return switch circuit 16 can be turned off manually, and is manually turned off when the safety lamp 2 is turned off. When the energized state remains in the off operation state, it can be used as the safety lamp 2 by being turned on by the automatic return operation.

Therefore, the use of the third embodiment differs from the above embodiment in the following points. That is, when the supply from the commercial AC power supply 15 is interrupted and a power failure occurs, the security lamp 2 is turned on immediately.
Here, if the safety lamp 2 does not need to be turned on, the automatic return switch circuit 16 can be turned off by manually turning it off. In this state, when the electric drum 1 is energized again with the commercial AC power supply 16, the power failure detection circuit 7 detects the energization through the fuse and rectifier circuit 12, and the automatic return switch circuit 16 is controlled by this detection signal. As a result, the switch of the automatic return switch circuit 12 returns to the ON state.
Further, the rechargeable battery 8 is charged by the charging circuit 6. Therefore, when the energization is interrupted again, the security lamp 2 is turned on.

  It is a front view of the appearance of the first embodiment of the present invention.   1 is a side view of a partially broken external appearance of a first embodiment of the present invention.   It is a circuit block diagram which shows the safety light lighting circuit of the 1st Example of this invention.   It is the front view which removed the security lamp | ramp in the external appearance of the 2nd Example of this invention.   It is a circuit block diagram which shows the security lamp lighting circuit of the 3rd Example of this invention.

Explanation of symbols

1 is an electrical drum 2 is a safety lamp 3 is a lighting switching circuit 4 is a switching means 5 is a lamp switch 6 is a charging circuit 7 is a power failure detection circuit 8 is a rechargeable battery 9 is a plug 9 10 is a service light switch 11 is a service light circuit 12 Is a rectifier circuit 13 is an alarm buzzer 14 is an energizing indicator lamp 15 is a commercial AC power supply 16 is an automatic return switch circuit 17 is a lamp assembly 18 is an attracting magnet 19 is a lamp assembly mounting part 20 is a carrying handle 21 is a support leg 22 Handle 23 is a lamp cord 24 is an outlet 25 is a rotary operation knob 51 is an alarm switch 52 is a lighting board for security with a charging circuit 53 is a cable

Claims (3)

  In the front plate of the cable reel provided with a support leg having a shaft that rotatably supports the tube forming the front plate and the rear plate, an outlet and a charging function are provided at one end of the cable wound in the tube. An electrical drum that is configured to automatically turn on in the event of a power failure by electrically connecting a safety light circuit board, a rechargeable battery, and a lamp.   The electric drum according to claim 1, wherein a lamp portion is provided on the front side plate so as to be detachable.   The switch circuit for turning on and off the lamp as the blackout lamp circuit is provided with an automatic return switch circuit so as to be turned on when energized even in the off state. Electrician drum.

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