JPH07155497A - Clothes dryer - Google Patents

Abstract

(57) [Summary] [Purpose] Vibration generated during operation is suppressed to a low level without the use of strength members. [Structure] A rotary drum 5 is provided in a dryer main body 1, and a front peripheral edge portion 11 of the rotary drum 5 is rotated by a circular drum support surface 13 of a drum support member 7 having an opening 19 as an inlet / outlet opening. The drum shaft 23, which is supported freely and extends from the rear side of the rotary drum 5, is rotatably supported by the bearing member 9, while the transmission belt 33 driven by the drive motor 29 is provided on the outer peripheral surface of the rotary drum 5.
And drives the transmission belt 33 in a direction in which the belt tension generated when the transmission belt is driven and the friction resistance generated on the drum support surface 13 and the front-side peripheral edge portion 11 of the rotary drum 5 are opposite to each other, The drum support surface 1 is set such that the position around which the transmission belt 33 is wound is set to be more than the normal line W passing through the center of gravity of the drum.
It is characterized in that it is provided close to the 3 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer.

[0002]

2. Description of the Related Art Generally, in a clothes dryer, the front side is an inlet / outlet port, and a rotary drum having an open front side and having a substantially U-shaped cross section is provided in the main body of the dryer.

The peripheral portion on the front surface side of the rotary drum is rotatably supported by a drum supporting surface formed in a cylindrical shape, while on the rear side of the rotary drum, a drum shaft extended from the rotary drum is a bearing such as a bearing. It is rotatably supported by a member.

A transmission belt driven by a drive motor is endlessly wound around the outer peripheral surface of the rotary drum.
It has a structure in which a rotational force is applied to the rotary drum via a transmission belt.

[0005]

As described above, the peripheral edge portion of the front end of the rotary drum on the inlet / outlet side is rotatably supported by the cylindrical drum support surface. It is a plain bearing surface with a felt etc. intervening to ensure airtightness over the entire circumference.

For this reason, a larger frictional resistance force is generated on the support surface side than on the drum shaft side, and two effects are exerted. One is that the direction of the frictional resistance force is generated along the tangential direction of the rotary drum, and acts as an action of rotating the rotary drum about a vertical axis that is orthogonal to the drum axis. The other causes vibration of the dryer main body, such as the fact that it becomes the same as the direction of belt tension when the transmission belt is driven, and acts as pulling the dryer main body in the belt tension direction. In order to prevent this, it is possible to solve the problem by increasing the support rigidity by using a strength member, but it is not desirable in terms of assembling, cost, weight reduction and the like.

Therefore, an object of the present invention is to provide a clothes dryer in which the vibration of the dryer body can be suppressed to a small level without strengthening the supporting rigidity of the dryer body.

[0008]

In order to achieve the above object, the present invention provides a rotary drum in a dryer main body having an opening / closing door on the front surface, and a peripheral portion on the front surface side of the rotary drum,
The drum support member is provided rotatably by the circular drum support surface of the drum support member having an opening serving as an inlet / outlet opening, and the drum shaft extended from the rear side of the rotary drum is rotatably supported by the bearing member, while rotating. A transmission belt driven by a drive motor is endlessly wound around the outer peripheral surface of the drum, and the transmission belt is generated between the belt tension generated when the transmission belt is driven and the peripheral edge of the drum support surface and the front surface of the rotary drum. It is driven in a direction opposite to the frictional resistance force, and the winding position of the transmission belt is provided closer to the drum supporting surface side than the normal line passing through the center of gravity of the drum.

[0009]

According to such a clothes dryer, the transmission belt applies a rotational force to the rotary drum. During the rotation of the rotary drum, the belt tension direction of the transmission belt and the frictional resistance direction of the rotary drum are in opposite directions and opposite directions, so that they act as forces canceling each other.

Further, since the point of application of the belt tension of the transmission belt approaches the position where the frictional resistance force is generated, the rotational action about the normal line passing through the center of gravity of the drum can be suppressed to a small level.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings of FIGS.

Reference numeral 1 in the drawing denotes a dryer main body. An opening / closing door 3 is provided on the front surface of the dryer main body 1, and the dryer main body 1
A rotary drum 5 is provided inside.

The rotary drum 5 is formed in a U-shaped cross section with an open front surface, and has a drying chamber inside. The front side of the rotary drum 5 is rotatably supported by a drum support member 7, and the rear side thereof is rotatably supported by a bearing member 9 such as a bearing.

The drum support member 7 has a cylindrical drum support surface 13 that rotatably supports the front peripheral portion 11 of the rotary drum 5, and a flange portion 15.
5 is fixed to the front mounting portion 17 of the dryer main body 1.

An opening 19 serving as a loading / unloading opening is provided at a substantially central portion of the drum supporting surface 13, and a felt 21 is attached to the outer peripheral surface of the drum supporting surface 13 for ensuring airtightness with the front peripheral portion 11. It has a plain bearing surface.

The bearing member 9 is fixedly supported by a bracket (not shown) extended from the dryer body 1,
A drum shaft 23 extended from the rear side of the rotary drum 5 is rotatably supported.

The drum shaft 23 extends through the bearing member 9, and a fan 25 and a pulley 27 are fixed to the extension shaft 23a.

On the other hand, the transmission belt 33 driven by the first motor pulley 31 of the drive motor 29 is endlessly wound around the outer peripheral surface of the rotary drum 5.

The position around which the transmission belt 33 is wound is provided closer to the drum support surface 13 side than the normal line W passing through the center of gravity 9 of the rotary drum 5. The closer this position is to the drum support surface 13, the more desirable.

The drive motor 29 is arranged and set on the right side of the rotary drum 5 as viewed from the front and on the upper side of the dryer main body 1. The rotation direction is clockwise in FIG. 3,
Belt tension (arrow a) is on the upper side 33a of the transmission belt 33.
Is set to work.

In this case, the drive motor 29 is connected to the rotary drum 5
It is also possible to adopt a layout configuration in which the belt tension (arrow a) is arranged in the opposite direction.

Further, the drive motor 29 has the above-mentioned first
A second motor pulley 35 is provided outside the motor pulley 31 of FIG. 3, a V belt 37 is wound around the second motor pulley 35 and the pulley 27 of the fan 25, and the fan 25 of the drive motor 5 is driven via the V belt 37. Rotational power is applied.

The drive motor 29 of this embodiment is provided with the second motor pulley 35 so as to also drive the fan 25. However, a fan drive motor may be provided independently. Is.

According to the clothes dryer thus constructed, the rotary power of the drive motor 29 is applied to the rotary drum 5 via the transmission belt 33.

During this operation, the belt tension (arrow a) acts on the upper side 33a of the transmission belt 33 as shown in FIG. On the other hand, the rotating drum 5 has a strong frictional resistance b between the upper part P of the front peripheral portion 11 of the rotating drum 5 and the drum supporting surface 13 due to its own weight, and the direction acts in the direction opposite to the belt tension a. become. As a result, as shown in FIG. 4, they act to cancel each other out in the rotational direction. On the other hand, as shown in FIG. 5, since the point of action of the frictional resistance b and the point of action of the belt tension a are close to each other, the rotational force (arrow c) about the normal line W passing through the center of gravity G can be suppressed to a small value. Like Therefore, the vibration of the dryer main body 1 is suppressed.

[0026]

As described above, according to the clothes dryer of the present invention, the vibration generated in the dryer main body can be suppressed to a small level without taking measures to increase the support rigidity.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a clothes dryer according to the present invention.

FIG. 2 is an exploded perspective view of a clothes dryer.

FIG. 3 is an operation explanatory view shown in a perspective view.

FIG. 4 is an operation explanatory view seen from the front.

FIG. 5 is an operation explanatory view seen from a plane.

[Explanation of symbols]

 3 Open / Close Door 5 Rotating Drum 7 Drum Support Member 9 Bearing Member 11 Front Side Peripheral Edge 13 Drum Support Surface 23 Drum Shaft 29 Drive Motor 33 Transmission Belt W Normal G Center of Gravity

Claims (1)

[Claims] 1. A dryer main body having an opening / closing door on the front,
A rotary drum is provided, and a peripheral edge portion on the front surface side of the rotary drum is rotatably supported by a circular drum support surface of a drum support member having an opening serving as an inlet / outlet opening, and a drum extended from the rear side of the rotary drum. While the shaft is rotatably supported by a bearing member, a transmission belt driven by a drive motor is endlessly wound around the outer peripheral surface of the rotating drum, and the transmission belt is driven by the belt tension generated when the transmission belt is driven and the drum. The friction resistance generated on the support surface and the peripheral portion on the front surface side of the rotating drum is driven in opposite directions, and the winding position of the transmission belt is made closer to the drum support surface side than the normal line passing through the center of gravity of the drum. A clothes dryer characterized by being provided.