JPS6048795A - Rotary drum type clothes dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention comprises a rotating drum for drying clothes, a heat source for heating air sent into the rotating drum, and a drive motor for driving the rotating drum. This invention relates to a rotating drum type clothes dryer.

Conventional structure and its problems In conventional rotary drum type clothes dryers, the belt tension mechanism of the belt that transmits the power of the drive motor to the rotary drum may malfunction, or the belt may come off or be cut, causing the rotary drum to fail. When the rotation of the drum stops, the clothes in the drum are not agitated, so the hot air is concentrated on some parts of the clothes, causing discoloration, melting, and scorching of fibers that are particularly sensitive to heat, and in the worst case scenario, the clothes catch fire. was there. However, in conventional rotary drum type clothes dryers, when the rotary drum stops rotating and the blower fan is rotating, a temperature rise prevention thermostat installed near the heat source and a temperature control system installed in the fan casing behind the rotary drum are activated. Since the adjustment thermostand does not turn off, hot air is continuously supplied to the rotating drum during the time limit set by the time switch, and if an abnormality such as a stoppage of the rotating drum is detected, the power to the heat source circuit is stopped. There wasn't.

OBJECTS OF THE INVENTION The present invention solves the problems of the prior art and provides a highly safe rotating drum type clothes dryer that prevents clothes from burning and catching fire when the rotating drum stops. This system reliably and simply detects the stoppage of the rotating drum due to tension mechanism failure, belt dislodgement, or cutting, and controls the energization of the heat source.

Structure of the Invention In order to achieve the above objects, the present invention provides a drive motor, a belt, and a bevel for rotatably driving a rotating drum.
A drum rotation detection mechanism equipped with a tension mechanism, in which the pressing part of a normally closed switch is located close to the tension spring that rotatably supports the tension pulley, and the contact opens based on the amount of change in the tension spring due to belt coming off or cutting. In the event of an abnormality such as belt breakage or disconnection, the contact of the normally closed switch can be opened to reliably stop the supply of electricity to the heat source circuit.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the figure, a rotating drum 4 rotatably supported by a drum support plate 2 and a fan casing 3 is included in the device main body 1.
A drum boot leaf and a motor pulley 8 are provided at one end of a drive motor 6 that rotates a rotating drum 4 and a fan 6 in a fan casing 3 in the main body 1, and a motor pulley 8 is provided at one end of the drive motor 6 for rotating a rotating drum 4 and a fan 6 in a fan casing 3. is conveying.

The drum support plate 2 has a clothes input port 11 and a plurality of hot air holes 12 formed in a part thereof, and a heater 13 with a heat source is provided opposite the hot air holes 12, and a door is provided to cover the clothes input port 11 so as to open and close it freely. 14 is fixed to the front of the device main body 1. 1 drive motor 6 is supported by a motor support plate 16 and fixed to the bottom of the device body 1, and the motor support plate 1
A tension pulley 17 is rotatably supported on the other end of the tension spring 16 which is locked with 6VC.
8 applies tension to the belt 9 in the direction of the arrow. Below the abbreviated part of the tension spring 16, a pressing part 21 made of an insulator fixed to the movable contact plate 20 of the normally closed switch 19 is positioned with a gap a. The case 22 is fixed to the bottom inside the device main body 1. If there is no abnormality such as detachment or breakage of the belt 9, tension is applied to the tension pulley 17 and the tension spring 16 in the direction of the arrow as shown by the solid line, so that the rotational force d of the drive motor 6 is The rotary drum 4 is rotated via. At the same time, since a gap a is provided between the tension spring 16 and the pressing part 21 of the normally closed switch 1-9, the contacts 23 and 24 of the normally closed switch 19 are closed, and the heater 13, which is the heat source, is closed. Hot air can be supplied into the rotating drum 4 by energizing it. -1 If the belt 9 breaks or comes off from the tension pulley 17,
Since the tension spring 16 is always biased in the direction of the arrow, the tension pulley 17 and the tension spring 16 are displaced to the state shown by the broken line, and the normally closed switch 19 provided below the abbreviated part of the tension spring 16 is pressed. Press the contact part 21 to open the contacts 23 and 24, and the heater 13
At the same time, the rotation of the rotary drum 4 is also stopped.

Effects of the Invention According to the above configuration, a normally closed switch is provided close to the tension spring of the belt tension mechanism, and in the event of an abnormality such as the belt coming off or breaking, the contact of the normally closed switch is opened by a change in the tension spring. This makes it possible to stop the power supply to the heater, thereby increasing the safety of the equipment by preventing discoloration, burning, or ignition of clothing inside the rotating drum.It also simplifies the drum rotation detection mechanism and ensures reliable detection. It is possible to provide a rotary drum type clothes dryer that is efficient and inexpensive.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a rotating drum type clothes dryer according to the present invention;
FIG. 2 is a sectional view of essential parts of the clothes dryer. 1...Equipment body, 4...Rotating drum,
6... Group drive motor, 16... Tension spring, 17... Tension pulley, 19
・・・・・・Normally closed switch 0

Claims (1)

[Claims] A belt tension mechanism is provided between a rotating drum in the main body of the device and a drive motor that drives this rotating drum, and a tension spring that rotatably supports a tension pulley of this belt tension mechanism is provided with a belt tension mechanism that measures the displacement of this spring. A rotary drum type clothes dryer with a normally closed switch that operates at