JPS6215040Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a dryer having a drum.

Conventional structure and its problems In conventional dryers of this type, the drum and the fan that sends air to the drum are driven by a motor via a belt, but even if the belt breaks, the heater is still energized. As this process takes place, high temperatures can occur locally, and if there is clothing that is sensitive to heat inside the drum, there is a risk that it will be damaged.

Purpose of the invention Therefore, the present invention prevents damage to clothing by cutting off electricity to the heater when the belt breaks.

Structure of the Invention In order to achieve the above object, in the present invention, when the belt is detached from the idler pulley, the idler pulley supporter operates a switch to cut off the power to the heater.

DESCRIPTION OF THE EMBODIMENTS In FIGS. 1 to 3, reference numeral 1 denotes a cabinet composed of a side plate 1' and a front plate 2, and a disk 6 fixed to the front plate 2 and having a flange portion 6' on the outer periphery;
The shaft 1 is inserted between the retaining plate 8 fixed to the back side of the side plate 1'.
5 rotatably houses a drum 24 which is constituted by a drum outer circumferential portion 3, a drum front plate 5, and a drum rear plate 4. The drum 24 is rotatably driven by a motor 28 fixed to the cabinet 1 via a belt 33, and the belt 33 is given tension by an idler pulley 32. The drum 24 has a heater 27 attached to a heater mounting plate 26 held between the front plate 2 and the disc 6 at positions corresponding to the ventilation holes 68 and 79 provided in the disk 6, respectively.
The heated air is taken in through the ventilation hole 68 of the disc 6. This heats the clothing inside,
The steam flows into the suction port of the fan case 77 through the ventilation hole 22 in the center of the drum rear plate 4 and through the air passage 75 formed by the holding plate 8 and the cover 9 of the holding plate 8 . A rotatably supported fan 34 is disposed inside the fan cases 43 and 35, and the fan 34 is rotatably supported.
Air is inhaled through fan case 35, 4.
The liquid is discharged from three discharge ports.
The idler pulley 32 is rotatably supported by a support A consisting of an arm portion 100 and a shaft portion 101, and the support A is always biased in a direction that applies tension to the belt 33. With the belt 33 removed from the idler pulley 32, the arm portion 100 of the support body A is turned on by the switch 10 as shown by the broken line in FIG.
Press the actuator 103 of No. 2 and switch 102.
The normally closed contact of the belt 3 is made to open.
When multiplied by 3, the arm part 100 becomes the actuator 10
3, the contacts of the switch 102 are closed. The contact point of switch 102 is motor 2
8. It is connected in series with the heater 27, and when the normally closed contact of the switch 102 is opened, the power to the motor 28 and the heater 27 is stopped. By doing this, when the belt 33 is properly engaged, the motor 28 and heater 27 are commonly energized.
The drum 24 and the fan 34 can also be driven normally and perform a normal drying action. Furthermore, if the belt 33 breaks due to some abnormality without the switch 102, the drive of the drum 24 will stop but the heater 27 will be energized, and the fan 34 will continue to rotate, but the drum 33 will be stopped. Therefore, the cloth that is in contact with the ventilation hole 79 of the disc 6 cannot move and is exposed to hot air intensively until the time switch 105 expires. In such a case, if the fabric exposed to intensive hot air is a synthetic fiber that is sensitive to heat, it will suffer damage such as deformation and discoloration.

On the other hand, when the belt 33 breaks and comes off the idler pulley 32 as in this embodiment,
If a switch 102 is provided that detects this and turns off the power to the motor 28 and heater 27, the above-mentioned damage can be avoided.

Note that 13 in FIG. 1 is a drum door, 20 is a filter section, 70 is a filter door, and 104 in FIG. 3 is a temperature fuse.

Effects of the invention In the present invention, when the belt that drives the drum comes off the idler pulley, electricity is cut off to the heater, so there is no chance of damage to clothing.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a front view of the main parts, and FIG. 3 is the electric circuit diagram. 24...Drum, 28...Motor, 32...Idler pulley, 33...Belt, 100...Arm portion, A...Idler pulley support.

Claims (1)

[Scope of utility model registration request] A rotating drum that is rotatably supported in a cabinet, a fan that sends air into the rotating drum, a heater that heats the air before it enters the rotating drum, and a motor that drives the rotating drum via a belt. an idler pulley that applies tension to a belt that connects and drives the motor and the rotating drum; and an idler pulley that supports the idler pulley and is rotatable via a fulcrum so as to come into contact with the belt. A dryer comprising: an idler pulley support body having an arm portion with an arm portion; and a switch that is operated by the idler pulley support body when a belt is removed from the idler pulley and cuts off electricity to a heater.