JPH0691095A - Drier - Google Patents

Abstract

PURPOSE:To reduce noise and vibration generated in rotating a drum normally or inversely in the drum of constitution to be rotatable normally and inversely. CONSTITUTION:A drum drive motor 12 to drive a drum 2 to rotate normally or inversely through a belt 15 is provided, a pair of tension pulleys 16, 17 to give tension to the belt 15 in rotating the drum 2 respectively normally or inversely are provided, and a pulley support member 18 for supporting the tension pulleys 16, 17 are rotatably provided. A damper 20 is provided between the pulley support member 18 and a main body 1. The pulley support member 18 can thus be rotated slowly by action of the damper 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dryer configured to rotate and reverse a drum.

[0002]

2. Description of the Related Art Conventionally, in a dryer, in addition to a type in which a drum whose inside is a drying chamber is rotated in one direction,
There is a type that rotates the drum forward and reverse. In the latter dryer, the motor is intermittently rotated in the forward direction and the reverse direction to rotate the drum in the normal direction and the reverse direction. Therefore, rotating the drum in one direction is effective for making clothes that are entangled with each other. I try to loosen it. Therefore, in such a dryer, the clothes are not entangled during the drying operation, so that it is possible to improve the drying efficiency and prevent the clothes from wrinkling.

[0003]

However, in the conventional drum normal rotation and reverse rotation type dryer, the impact force is generated in the rotation transmission mechanism from the motor to the drum at each forward rotation and reverse rotation of the motor. There is a problem in that impact noise and squeak noise are generated due to the action of the, and vibration is large.

On the other hand, the present inventor has sought to find out the cause of the above-mentioned impact noise and squeak noise. In a normal rotation and reverse rotation type dryer, when the motor drives the drum forward and reverse through a belt,
A pair of tension pulleys that apply tension to the belt are provided, and a pulley support member that supports the pair of tension pulleys is rotatably provided. In this configuration, it was observed how the above-mentioned parts move when the drum was rotated in the normal direction and inverted. From this observation result,
It has been found that a large force acts on the pulley supporting member at each start of the normal rotation and the reversing of the drum to rapidly rotate the pulley supporting member and vibrate violently. That is, it has been found that shock noise, squeak noise, and the like are generated due to the abrupt rotation and vibration of the pulley support member. Therefore, in order to reduce the impact noise and the squeak noise, the pulley supporting member may be slowly rotated.

Therefore, an object of the present invention is to provide a dryer which is configured to rotate and rotate the drum in the normal direction and which can reduce noise and vibration generated when the drum is rotated and rotated in the normal direction. It is in.

[0006]

A dryer of the present invention includes a drum having a drying chamber inside, and a motor for driving the drum in a normal direction and a reverse direction through a belt, the drum being in the normal direction and the reverse direction. In a dryer including a pair of tension pulleys that apply tension to the belt when the belt is rotated, and a pulley support member that is rotatably provided and supports the pair of tension pulleys, a damper is provided on the pulley support member. It has a feature where it is provided.

[0007]

According to the above means, since the damper is provided on the pulley supporting member, at the time of starting each of the normal rotation and the reverse rotation of the drum,
The pulley supporting member is prevented from rapidly rotating and vibrating, so that the pulley supporting member slowly rotates. For this reason, the impact noise, the squeak noise, and the like that are generated at the time of each of the normal rotation and the reverse rotation of the drum are reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 2 showing the overall structure of the dryer.
In, the drum 2 is rotatably disposed inside the main body 1 of the dryer. The inside of this drum 2 is a drying chamber 3
A fan 4 that also serves as a heat exchanger is provided at the rear of the drum 2. The fan 4 is configured to be rotationally driven by a fan motor 5 disposed on the rear side of the bottom of the main body 1.

Due to the blowing action of the fan 4, the air in the drying chamber 3 is sucked into the front fan chamber 8 through the filter 6 and the vent hole 7 in the rear portion as shown by the arrow A, and then passes through the duct 9. The heater 10 is used for heating when returning to the inside of the drying chamber 3. By such circulation, warm air is supplied into the drying chamber 3. Also,
Due to the blowing action of the fan 4, the outside air is sucked into the rear fan chamber 11 as indicated by an arrow B, and
Since the air is discharged, the outside air and the internal circulating hot air are heat-exchanged via the fan 4.

The drum 2 is rotated by a drum motor 12 arranged on the front side of the bottom of the main body 1. The drum motor 12 is a motor rated at 100 V AC, and is a motor that can be driven to switch between forward rotation and reverse rotation. And as shown in FIG.
A pulley 14 is attached to the rotary shaft 13 of the drum motor 12, and a belt 15 is stretched between the pulley 14 and the outer peripheral surface of the drum 2.

Further, the drum 2 is driven by the drum motor 12.
Since it is configured to rotate normally and reversely, a pair of tension pulleys 16 and 17 are provided as tension pulleys that apply tension to the belt 15. The pair of tension pulleys 16 and 17 includes a pulley support member 18
Supported by. The pulley supporting member 18 is composed of, for example, a torsion bar, and is composed of a first supporting arm portion 18a, a second supporting arm portion 18b, and a shaft portion 18c connecting the supporting arm portions 18a and 18b. .

The pulley supporting member 18 has a shaft portion 18
The c is rotatably pressed and fixed on the bottom plate of the main body 1 by a pressing plate 19. As a result, the pulley support member 18 is rotatable around the shaft portion 18c as the rotation center. In this case, the pulley support member 1
8, one tension pulley 16 is attached and supported on the upper end of the first support arm portion 18a, and the other tension pulley 17 is attached on the upper end of the second support arm portion 18b.
Are installed and supported. Then, the pulley support member 18
The tension force of one tension pulley 16 is urged in the direction of arrow S and the tension pulley 17 of the other is urged in the direction of arrow T by its own spring force.

Here, the pulley supporting member 18 is provided with a damper 20 of, for example, an air spring type. The damper 20 includes a first member 21 (a member on the cylinder side) and a second member 22 (a member on the piston side) that is inserted into and removed from the first member 21.
When the second member 22 is inserted into and removed from the air, air flows in and out through an orifice (not shown), so that a resistance force of a predetermined strength is given to the insertion and removal movement of the second member 22. It is designed to be used.

In this case, the damper 20 includes the first member 21.
1 is rotatably connected to the upper end side of the second support arm portion 18b of the pulley support member 18 via a shaft 23, and the left end portion of the second member 22 in FIG. The bottom plate of the main body 1 is rotatably connected via a shaft 25 to a supporting portion 24 provided in a protruding manner.

Next, the operation of the above configuration will be described. When the drum 2 is normally rotated, as shown in FIG. 1, when the drum motor 12 is rotationally driven in the normal direction (arrow Q direction),
The tension pulley 16 side of the belt 15 is "tensioned"
Side, and the tension pulley 17 side is the "loose" side. Therefore, in this case, the pulley support member 18 is
The tension pulley 16 and the tension pulley 17 are both swung to the right in FIG. 1 by rotating in the clockwise direction.
On the contrary, when the drum 2 is reversed, that is, when the drum motor 12 is rotationally driven in the reverse direction (direction of arrow R), the relationship described above is opposite.

Now, at the time of starting the drum 2 for normal rotation,
The driving force of the drum motor 12 strongly acts on the belt 15, so that the pulley supporting member 18 tries to rapidly rotate in the clockwise direction in FIG. At this time, since the damper 20 is provided between the pulley supporting member 18 and the bottom plate portion of the main body 1, the pulley supporting member 18 is prevented from abruptly rotating and vibrating, and the pulley supporting member 18 is prevented. 18 will rotate slowly. Similarly, when the drum 2 is reversed and started, the action of the damper 20 causes the pulley supporting member 18 to slowly rotate.

As a result, in this embodiment, since the pulley supporting member 18 slowly rotates at the time of each of the forward rotation and the reverse rotation of the drum 2, the pulley supporting member 18 is suddenly rotated and vibrated. It is possible to reduce impact noise, squeak noise, vibration, etc. that occur due to the noise, and reduce noise and vibration during operation.

In the above embodiment, the damper 20 is provided between the second supporting arm portion 18b of the pulley supporting member 18 and the bottom plate portion of the main body 1, but instead of this, the first
The support arm portion 18c may be provided between the support arm portion 18c and the bottom plate portion of the main body 1, or two dampers may be provided between the support arm portions 18a and 18b and the bottom plate portion of the main body 1, respectively. Also good.

Further, in the above embodiment, an air spring type damper is used as the damper 20, but the damper 20 is not limited to this, and for example, a hydraulic type shock absorber or a gas type shock absorber may be used. Alternatively, a solid friction type damper may be used.

[0020]

As is apparent from the above description, the present invention has the structure in which the damper is provided on the pulley supporting member for supporting the pair of tension pulleys, so that the drum is configured to rotate normally and reversely. In spite of this, there is an excellent effect that it is possible to reduce noise and vibration generated when the drum is normally rotated and inverted.

[Brief description of drawings]

FIG. 1 is a rear view around a tension pulley showing an embodiment of the present invention.

[Figure 2] Vertical side view of the entire dryer

[Explanation of symbols]

1 is a main body, 2 is a drum, 3 is a drying chamber, 4 is a fan, 5 is a fan motor, 10 is a heater, 12 is a drum motor, 14 is a pulley, 15 is a belt, 16 and 17 are tension pulleys, and 18 is A pulley supporting member, 18a is a first supporting arm portion, 18b is a second supporting arm portion, 18c is a shaft portion, and 20 is a damper.

Claims (1)

[Claims] 1. A drum having a drying chamber inside, a motor for driving the drum in a normal direction and a reverse direction via a belt, and a pair of a pair of members for applying tension to the belt when the drum rotates in the normal direction and the reverse direction, respectively. A dryer comprising a tension pulley and a pulley support member that is rotatably supported to support the pair of tension pulleys, wherein a damper is provided on the pulley support member.