JPS6135171Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an electric floor polisher, and aims to improve electrical safety, reduce the number of parts, and reduce assembly man-hours, and provides an inexpensive and electrically safe electric floor polisher. The purpose is to provide.

Conventionally, electric floor polishers are often used in environments such as cleaning and waxing that use water, so electrical safety is desired in terms of preventing electric shock.

However, since it has been difficult to construct this type of electric floor polisher in terms of ensuring heat resistance, strength, precision, etc., the main body and motor bracket have traditionally been made of aluminum die-casting, sheet metal, or the like. For this reason,
Since the motor bracket and the main body were electrically connected, the main body had only one level of insulation, which was insufficient for safety. Therefore, two-stage insulation of the handle portion was provided by interposing an insulator between the handle attached to the main body and operated by the user. Furthermore, since the switches and power cables installed inside the main unit are surrounded by conductive metal, many parts such as mounting brackets and insulating tubes are required to ensure an insulated distance from the switch terminals. It required a number of points and assembly man-hours.

This invention solves the above conventional problems,
Examples thereof will be described in detail below based on the drawings.

In the figure, reference numeral 1 denotes a main body made of aluminum die-casting, etc., in which a pair of two-stage gears 2 that are pivotally supported by the main body 1 and mesh with each other are built in the center, and a brush gear 3 that meshes with the two-stage gears 2 is built in on the outside. There is. The brush gear 3 is connected to a brush shaft 4 rotatably supported by the main body 1, and a floor swing 5 is disposed on the lower surface of the main body 1 so as to be detachably attached to the brush shaft 4. A motor 6 is mounted on the upper surface of the main body 1, and a gear cut by a rotor 7 is engaged with one of the two-stage gears 2. 8 is a handle mounting plate fixed to the main body 1;
A handle fitting 9 is rotatably supported by a shaft 10. Reference numeral 11 denotes a handle that can be attached to and detached from the handle fitting 9.

12 is a bracket that constitutes the motor 6;
Constructed of highly heat-resistant insulators such as PBT and PET. A switch case 13 is integrally formed with the bracket 12 and holds the switch 14. Numeral 15 is a plurality of bosses formed integrally with the bracket 12 to hold the power supply wire 16. 1
Reference numeral 7 denotes a handle stopper whose one end is rotatably supported by a handle mounting plate 8, and a claw 19 integrally formed with the handle stopper 17 is brought into elastic contact with the handle fitting 9 by a spring 18. 20 is a groove formed in the handle fitting 9 corresponding to a part of the contact surface of the handle stopper 17;
In the upright position, the pawl 19 engages with the groove 20. Reference numeral 21 denotes a stiff spring disposed on the shaft 10, one end of which is fixed, and the other end of which is hooked onto the handle fitting 9 to bias the handle 11 in the tilting direction. 2
2 is a pedal arranged at the tip of the handle stopper 17.

23 is fixed to the handle metal fitting 9, and the handle 1
1 is a switch insulating plate that closes the switch 14 by tilting; 24 is a cover that covers the motor 6;
By fixing the switch 14 and the power wire 1, the rib 25 integrally arranged inside the
Lock 6. 26 is a bumper arranged around the outer periphery of the main body 1.

To explain the operation in the above configuration, when the user holds the handle 11 and depresses the pedal 22, the claw 19 of the handle stopper 17 comes out of the groove 20 of the handle metal fitting 9, and the handle 11 can be folded down. By tilting the handle 11, the switch insulating plate 25 is moved to the switch 14.
is closed, and the motor 6 rotates. This rotation is decelerated by the two-stage gear 2 and the brush gear 3, and the floor brush 5 is rotated by the brush shaft 4. When the device is operated by holding the handle 11, since the handle 11 is biased by the stiff spring 21, the main body 1 is pressed against the floor surface, which improves the scrubbing effect on the floor more than the weight of the device. This also prevents vibrations of the entire device due to vibrations transmitted from the floor.

As mentioned earlier, electric floor polishers are often used in water-based environments, and electrical safety is desired. The main body has an additional layer of insulation, resulting in two-stage insulation, and the metal parts that can be touched by people have excellent electrical safety. Furthermore, since the switch case is integrally formed with the insulating motor bracket, there is no problem with the insulation distance from the switch terminal, and the power supply wire can be attached by simply fitting it into the boss. Furthermore, when the cover is tightened to the main body, the switch and power wire can be automatically fixed, making it possible to reduce the number of parts and assembly man-hours, thereby providing an electric floor scrubbing machine that is inexpensive and has high electrical safety. It is effective and has great practical value.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an electric floor polisher showing an embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a side view of a handle attachment portion. 1... Main body, 5... Floor polishing tool (floor brush), 6
... Motor, 11 ... Handle, 12 ... Bracket, 14 ... Switch, 16 ... Cord (power wire).

Claims (1)

[Scope of utility model registration request] The main body has a built-in speed reducer and a floor polishing tool,
A handle provided on the main body and a motor are placed on the top surface of the main body, and part or all of the bracket of this motor is made of an insulator, and the case part of the switch and the stop part of the cord are integrated into the insulator bracket. An electric floor polisher with a switch and cord locked by fastening a cover that covers the motor.