JP3125530B2 - Fully automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine in which a circulating water channel is provided in a washing and dewatering tub made of different materials such as resin and metal.

[0002]

2. Description of the Related Art In recent years, in a fully automatic washing machine, a washing and dewatering tub has been made of stainless steel in order to cope with speeding up of dehydration and adhesion of soap scum to the washing and dehydrating tub. Conventionally, the circulating water channel is formed by a substantially U-shaped water channel made of resin like the resin washing and dewatering tub, and there is no problem with the same material, but even when stainless steel is used, the resin is used for the circulating water channel. The problem of using different materials arises.

Conventionally, this type of fully automatic washing machine has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in the figure, a washing and dewatering tub 1 is formed of a stainless steel plate, a pulsator 2 is rotatably disposed on the bottom surface, and a mounting flange 3 is mounted on the back surface of the bottom surface. . The water receiving tub 4 is provided outside the washing and dewatering tub 1, and a motor 5 for driving the washing and dewatering tub 1 and the pulsator 2 is attached to the back surface of the water receiving tub 4. Further, the water receiving tank 4 is supported on the outer frame 6 by a suspension 7 in a vibration-proof manner. A fluid balancer 8 containing a liquid is fixed to an upper portion of the washing and dewatering tub 1.

[0005] A substantially U-shaped water channel case 9 is fitted to the side surface of the washing and dewatering tub 1, and a circulating water channel 10 is formed between the washing and dewatering tub 1 and the side surface of the washing and dewatering tub 1. The lower blade 11 is integrally provided on the back surface of the pulsator 2, and a pump chamber 12 is formed on the outer periphery of the lower blade 11 of the pulsator 2. The rotation of the pulsator 2 causes the water on the back surface of the pulsator 2 to pass through the circulation channel 10, reach the fluid balancer 8, and discharge into the washing and dewatering tub 1 from the opening 13 of the channel.

As shown in FIG. 5, the water channel case 9 is provided with a fan-shaped portion 14 at the lower end for effectively collecting water on the back surface of the pulsator 2, and the upper end is positioned with the fluid balancer 8. Has a structure in which a lint filter 15 for collecting lint from circulating water can be attached,
It has a complicated shape and is made of resin.

[0007]

In such a conventional fully automatic washing machine, the water channel case 9 forming the circulation water channel 10 is made of resin, the washing and dewatering tub 1 is made of stainless steel plate, and made of a combination of different materials. Since the thermal expansion coefficients of the two are greatly different from each other by about 10 times, when hot water or the like is used, the resin waterway case 9 has a larger elongation than the stainless steel sheet washing and dewatering tub 1, but the stainless steel sheet washing and dewatering tank 1 does not. Since the dewatering tub 1 has a small expansion, the waterway case 9 is deformed inside the washing and dewatering tub 1, and the waterway case 9 and the washing and dewatering tub 1 are deformed.
A gap is formed between the side walls and the circulating water leaks, reducing the lint collection ability, and the buttons and hooks of the clothes being washed may be caught in the gaps, possibly causing damage to the clothes. Had.

Further, water is left in the circulation channel 10 during dehydration during dehydration, and when the dehydration is stopped suddenly, water flows out to the pulsator 2 and adheres to the dewatered clothes. When 10 has a substantially cylindrical shape, the circulation channel 1
There was a problem that the hole for discharging the residual water of 0 and the hole position of the washing and dewatering tub 1 were provided at the same position, and the residual water in the circulation channel 10 had to be discharged at the time of dehydration.

Further, a gap is easily generated between the water channel case 9 and the washing and dewatering tub 1 even during normal use, and there is a problem that a sponge or the like is used to cope with the problem.

The present invention solves the above-mentioned conventional problems. Even in a combination of a resin-made circulating water channel and a washing and dewatering tub made of a stainless steel plate, the difference in thermal expansion is absorbed and the circulating water channel can be used even if hot water is used. It is a first object of the present invention to prevent a problem such as deformation of the device.

It is a second object of the present invention to smoothly discharge water remaining in the circulation channel during dehydration and to prevent the water in the circulation channel from flowing backward when the dehydration is stopped to wet the clothes.

A third object of the present invention is to prevent lint generated from clothes being washed from being caught and clogging a circulation channel.

[0013]

According to the present invention, there is provided a washing and dewatering tub having a bottom formed of resin and a cylindrical side wall formed of a metal plate. A pulsator rotatably disposed at the bottom of the pulsator and a substantially cylindrical circulation communicating from a pump chamber formed on the outer periphery of the lower blade of the pulsator to a fluid balancer disposed above the washing and dehydrator; A lower portion of the circulating water channel, the lower portion of the circulating water channel being fitted to the bottom of the washing and dewatering tub with a pin or a first rib body projecting downward, and a substantially L-shaped second provided on the back surface of the circulating water channel. The rib body and the claw portion are fitted to the side wall portion, and the claw portion is provided below the center of the circulating water channel, and is locked by the claw portion and the upper surface of the square hole provided in the side wall portion. The upper end of the circulation channel is positioned by the fluid balancer. The by and between them is the first means for solving problems in that a gap in the vertical direction.

In order to achieve the second object, a small hole is provided at an upper portion of the second rib provided on the back of the circulation channel of the first means for solving the problem, and the second rib is provided. The second problem solving means is that the small hole communicates with the square hole when the square hole is engaged with the square hole provided in the side wall of the washing and dewatering tub.

In order to achieve the third object, the circulating water channel of the first means for solving the problem is formed by welding a substantially U-shaped water channel case and a water channel guide, and is formed inside the welding surface. Providing a third rib body and a fourth rib body substantially parallel to the welding surface is a third means for solving the problem.

[0016]

According to the first aspect of the present invention, there is provided:
Even if the circulation channel is thermally expanded from the washing and dewatering tub due to the use of warm water or the like and extends in the vertical direction, the lower portion of the circulation channel is regulated by the claw. At this time, since the position of the claw portion is located substantially below the center of the circulation channel, the length of the circulation water channel below the position of the claw portion is short, the expansion due to thermal expansion is small, and there is no problem in restricting the expansion. A gap is provided above the claw portion by a fluid balancer, so that elongation due to thermal expansion of the circulation channel can be released.

According to the second means for solving the problem, the water in the circulation channel is drained to the outside of the washing and dewatering tub through the small holes and the square holes at the time of dehydration to eliminate residual water in the circulation channel. Can be.

Further, according to the third means for solving the problem, the circulating water channel can be made substantially cylindrical by welding the water channel case and the water channel guide. The third rib body and the fourth
By providing the rib body, it is possible to prevent lint contained in the water passing through the circulation channel from being caught on the welding surface.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in the figure, the washing and dewatering tub 16 has a bottom portion 17 made of resin and a side wall portion 18 made of a stainless steel plate, and the fluid balancer 8 is arranged on the upper portion. The pulsator 2 is rotatably arranged at the bottom 17 of the washing and dewatering tub 16, and communicates from the pump chamber 12 formed on the outer periphery of the lower blade 11 of the pulsator 2 to the fluid balancer 8 by a substantially cylindrical circulating water passage 19. ing.

The circulation channel 19 is formed by welding and integrating a channel case 20 and a channel guide 21. A second rib body 22 and a claw portion 23 are provided on the back surface of the water channel guide 21, and are engaged with square holes 24 and 25 provided in the side wall portion 18, respectively. The position of the claw 23 is provided below the circulation channel 19, and the claw 23 is engaged with the square hole 25 on the upper surface, and once locked, the portion of the circulation channel 19 below the claw 23 is directed upward. Movement is regulated. A pin 26 and a first rib 27 protrude downward from the lower part of the circulation channel 19 and are fitted to the bottom 17 of the washing and dewatering tub 16. The upper end of the circulating water channel 19 is provided with an upwardly projecting rib 28, which is inserted into the fluid balancer 8 to regulate the position. However, a gap is provided between the rib 28 and the fluid balancer 8 in the vertical direction.

With this configuration, even when hot water is used, the elongation of the circulation channel 19 is less affected by the portion below the claw portion 23, and the portion between the fluid balancer 8 and the rib 28 above the claw portion 23. So that it does not hinder the use of the washing machine. If such measures are not taken, the circulating water channel 19 is deformed to reduce the amount of circulating discharge for collecting lint, or a gap is formed between the side wall portion 18 and a button of clothing is hooked, A step may be formed on the bottom 17 of the washing and dewatering tub 16, which may damage the clothes or cause the circulation water channel 19 to slip off.

In this embodiment, the circulation channel 19 is integrally formed by welding a channel case 20 and a channel guide 21, and the L-shaped second rib body 2 is provided on the back surface of the channel guide 21.
2 and a claw portion 23 are engaged with the square holes 24 and 25 provided in the side wall portion 18 to prevent the circulating water passage 19 from moving upward, and the substantially rib-shaped second rib body 22 is provided. Is prevented from rising into the washing and dewatering tub 16 of the circulation channel 19 by entering the square hole 24.

The water channel guide 21 is provided with a small hole 29 above the second rib body 22, and this small hole 29 communicates with the square hole 24 when the circulating water channel 19 is attached to the side wall 18. Therefore, the water in the circulation channel 19 at the time of dehydration is
The water is discharged to the outside of the washing and dewatering tub 15 through the small holes 29 and the square holes 24, and the residual water in the circulation water channel 19 can be eliminated.

Next, another embodiment of the present invention will be described with reference to FIG. The circulation channel 30 is formed by welding and integrating a substantially U-shaped channel case 31 and a channel guide 32. At this time, the welding surfaces 33, 34 are provided inside the welding surfaces 33, 34 of the waterway case 31 and the waterway guide 32, respectively.
The third rib 35 so as to cover the welding surface substantially parallel to
And a fourth rib body 36. With this configuration,
It is possible to prevent the lint and the like of the clothes passing through the circulation channel 30 from being caught on the burrs generated on the welding surfaces 33 and 34 during welding.

[0026]

As apparent from the above embodiments, according to the present invention, there is provided a washing and dewatering tub comprising a bottom formed of a resin, a cylindrical side wall formed of a metal plate, and a fluid balancer. A pulsator rotatably disposed at the bottom of the washing and dewatering tub, and a substantially cylindrical circulation communicating from a pump chamber formed on the outer periphery of the lower blade of the pulsator to a fluid balancer disposed at the top of the washing and dewatering tub. A lower portion of the circulation channel is fitted to the bottom of the washing and dewatering tub by a pin or a first rib body projecting downward, and a substantially L-shaped second rib provided on the back of the circulation channel. Along with the body and the claw, the claw is fitted to the side wall, the claw is provided below the center of the circulation channel, and the claw is locked with the upper surface of the square hole provided in the side wall, The upper end of the circulation channel is positioned by the balancer. And a vertical gap is provided between the two, so even in the combination of a resin circulation channel and a stainless steel plate washing and dewatering tub, the difference in thermal expansion is absorbed and the circulation channel is used even if hot water is used. Problems such as deformation do not occur.

A substantially L-shaped second rib body is provided on the back surface of the circulating water channel, and a small hole is provided above the second rib body. Since the small holes are communicated with the square holes when locked in the square holes provided in, the water remaining in the circulation channels during the dehydration can be smoothly discharged, and the water in the circulation channels when the dehydration is stopped. Can be prevented from flowing back and wetting the clothes. Moreover, there is no need to add extra processing to the side wall.

Further, the circulation channel is formed by welding a substantially U-shaped channel case and a channel guide, and a third rib member and a fourth rib member are provided inside the welding surface substantially parallel to the welding surface. Is provided, it is possible to prevent the lint generated from the clothes being washed from being caught by the burrs of the welding surface and the like, thereby preventing the circulation channel from being clogged.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fully automatic washing machine according to an embodiment of the present invention.

FIG. 2A is an exploded perspective view of a circulation channel of the fully automatic washing machine. FIG. 2B is a perspective view of the circulation channel of the fully automatic washing machine viewed from the back.

FIG. 3 is a sectional view of a circulation channel of a fully automatic washing machine according to another embodiment of the present invention.

FIG. 4 is a sectional view of a conventional fully automatic washing machine.

FIG. 5 is a perspective view of a circulation channel of the fully automatic washing machine.

[Explanation of symbols]

 Reference Signs List 2 Pulsator 8 Fluid balancer 11 Lower blade 12 Pump chamber 16 Washing and dewatering tub 17 Bottom part 18 Side wall part 19 Circulating water channel 22 Second rib body 23 Claw part 24 Square hole 25 Square hole 26 Pin 27 First rib body

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D06F 39/08 D06F 39/12

Claims (3)

(57) [Claims] 1. A washing and dewatering tub having a bottom formed of resin and a cylindrical side wall formed of a metal plate, a pulsator rotatably disposed at the bottom of the washing and dewatering tub, and the pulsator. A substantially cylindrical circulating water passage communicating from a pump chamber formed on the outer periphery of the lower blade to a fluid balancer arranged above the washing and dewatering tub, and a lower part of the circulating water passage is provided with a pin or a pin protruding downward. The first rib body is fitted to the bottom of the washing and dewatering tub, the substantially L-shaped second rib body provided on the back of the circulation channel and the claw are fitted to the side wall part, and the claw is provided. Part is provided below the center of the circulating channel, and is locked by the claw portion and the upper surface of a square hole provided in the side wall portion, and the upper end of the circulating channel is position-regulated by the fluid balancer and Fully automatic washing machine with a vertical gap between . 2. A small hole is provided in an upper portion of a second rib provided on the back of the circulation channel, and when the second rib is locked in a square hole provided on a side wall of the washing and dewatering tub, 2. The fully automatic washing machine according to claim 1, wherein the small hole communicates with the square hole. 3. A circulation channel formed by welding a substantially U-shaped channel case and a channel guide, and a third rib member and a fourth rib member inside the welding surface substantially parallel to the welding surface. The fully automatic washing machine according to claim 1, further comprising: