JPS59115080A - Stirrer blade for washer - 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 relates to an agitating blade disposed at the inner bottom of a washing tub.

Structure of conventional examples and their problems Traditionally, in Japan, so-called whirlpool washing machines have been put into practical use, in which stirring blades are installed at the bottom of the washing tub, and the rotation of the blades generates a whirlpool water flow to wash clothes. ing.

In this type of washing machine, as shown in FIG.
is installed in a manner that protrudes from the bottom C of the washing tub into the tub. Therefore, the part where the agitating blade a directly contacts the clothes has a very strong cleaning power, while the part where the agitating blade a directly touches
1. The cleaning power of the parts of the clothes that have been washed is weaker. As a result, the washing becomes more uneven and the parts of the clothes that directly come into contact with the agitating blades a are seriously damaged.

Furthermore, the outer diameter d of the stirring blade color is compared to the inner diameter d2 of the washing tub.
, approximately A or less, and the rotational speed is set at approximately 300 revolutions per minute or more, and the small diameter stirring blade a protruding into the washing tub rotates at high speed. The part of the clothes that directly hits the stirring blade a is hooked and turned, and that part or the part near it is twisted to some extent to apply the full stirring force to the entire clothes and immediately to the clothes above the washing tub.

For this reason, the clothes get kinked, and when they are washed or dehydrated,
Later, when I took out the cloth, it took a lot of effort to pull it out.

':'I/This, in addition to what has been mentioned above, a stirring blade is housed in a non-protruding state from the bottom of the washing tub, and the force at the outer periphery and the center Fi
A concave substrate whose depth gradually increases according to the length of the substrate, and the upper surface of this substrate has the most protrusions in the center, and the degree of protrusion gradually decreases toward the outer periphery, and the top is the inner bottom surface of the washing tub. An agitating blade for a washing machine that also serves as a dehydrator has been proposed, which includes a blade and a wing protrusion provided in a continuous manner.

During this time, it can be predicted that the stirring blades will have the effect of preventing the laundry from shifting in the washing tub, reducing vibrations during spin-drying, and preventing damage to the laundry. However, in order to improve the cleaning effect, it is necessary to form a water flow from the middle side to the outer circumferential side between the pterygoid ridges, but the conventional configuration described above does not solve this problem. The product does not specifically disclose its roughness, and there are still concerns about cleaning.

OBJECTS OF THE INVENTION The present invention provides an agitator blade for a washing machine that reduces the amount of twisting of clothes and has an excellent cleaning effect.

Structure of the Invention The invention also provides an IC'+<[IJ
j (r, the central part is spherical, and from this the outer circumference 11111 V descends to form a horizontal surface, and furthermore,
A base having a circular arc rising toward the outer periphery from 1 fji below the water, and a plurality of mountains provided approximately radially on the upper surface of this base, and the base has a circular arc that is connected to the aforementioned arc and is smaller than this arc. The depth of the horizontal surface is set to about 10 to 20% of the radius of the board, and the outer diameter of the base is Approximately γ○~80 for the inner diameter dimension of the washing tub
It is set to

DESCRIPTION OF ACTUAL TRAVEL 1 Hereinafter, a practical example of the present invention will be described based on the accompanying drawings. 1
Figure 2 shows the overall configuration of a fully automatic washing machine, where 1 is the outer panel of the main body, 2 is a washing tank AIF with a large number of dehydration holes 2,
Dehydration tank (hereinafter referred to as a washing tank), 41-, a stirring blade rotatably installed at the inner bottom of the washing tank 2, 511-i: water receiving tank,
6 is a balancer for maintaining balance during dehydration, and 7 is an operation panel containing switches and the like.

8 is a motor, and this rotational force is generated by a pulley 9 and a belt 1.
0, through the pulley 11, is further decelerated by the deceleration drive mechanism section 12, and is transmitted to the stirring blade 4.

13 is a gun bar for absorbing dewatering vibrations, 14 is a rod, 15 is a drain valve, and 16 is a drain hose.

The overall configuration has been described above, and next, the specific configuration of the stirring blade 4 will be explained with reference to FIGS. 3 to 5.

The 11Ft agitation absorber 4 has a hemispherical part 17 at the center of its upper surface that rises in a spherical shape, and the base surface 1 extends toward the outer circumference.
8 is lowered by a certain distance, and the base surface 18 becomes a horizontal surface 19, and a first circular arc 22 & that rises outward on a tangent from approximately halfway between the center portion 2o and the outer peripheral portion 21, and this 1 from the position where the arc 222L of No. 1 has risen to some extent.
A base @23 having an ascending curved surface by sequentially connecting second arcs 22b,' smaller than the circular arc 22b of It consists of Mt. 24. The top 26 of the mountain 24 is connected to the base 23 at a substantially horizontal plane 27 toward the outer periphery from a point 25 near the midpoint between the center portion 2o and the outer periphery 21 or slightly closer to the outer periphery than this. It descends as shown by 28 toward the center 20 from a position 26 near the midpoint or slightly outward from this, and has a lowest point 29 approximately halfway between the position 25 and the center 2°. , and further 30 from the lowest point 29 toward the center 20.
It rises as shown by and connects to the hemispherical part 17.

Cocoa, the first circular arc 22a, 22tz7) The radius is approximately A of the outer diameter of the stirring blade 4, that is, the base 23, and the radius of the second circular arc 22b is approximately V2 of the radius of the first circular arc 22a. Take it to a certain extent.

Further, the horizontal plane 19 is the deepest part of the base 23, and the radius of the stirring blade is adjusted to the depth H of this deepest part.
The depth shall be io~20.

Next, the cross-sectional shape of the mountain 24 is shown in FIG.
(A) to (equity in FIG. 6 corresponds to A-H in FIG. 3 by x·1. Between the top part 26 and the base 23
Connected by tf++ 31, top 26 to base 23
is changing as shown in the figure.

′=! In addition, the outer diameter d1 of the stirring blade 4 is the inner diameter d2 of the washing tub 2.
Assuming that 1, the width should be approximately 0.7 to 0.8, and as shown in FIG. 2, it is installed at the bottom of the washing tub 2.

Here, 32 is a fitting part attached to the rotating shaft, and 33 is a boss.

The operation of the configuration as shown below will be explained. The agitating blade 4 is rotated in the reverse order of clockwise rotation, stop, counterclockwise rotation, etc., and the rotation a is set to approximately 200 revolutions per minute or less, and the stirring blade 4 is rotated at a relatively low speed.

The cleaning effect on washed clothes can be roughly divided into two: the effect of the water flow generated by the rotation of the stirring blades 4, and the effect of the piles 24 of the stirring blades 4 directly moving the clothes.

The water flow generated by the stirring blade 4 is as shown by the arrows in FIGS. 2 and 4, and the water that enters from the hemispherical part 17 of the center part 20 descends to reach the horizontal surface 19vC, where it reaches the horizontal surface 19vC. The water rises from there and reaches the wall surface of the washing paddle tank 2, and further rises as it cures, becoming a large arcuate water flow above the stirring blades 4.

Then, the cross-sectional shape of the base 23 is changed from the horizontal plane 19 outward to the first. Since the second circular arc 20.21 is a fully connected curved surface, the water flow descending from the hemispherical part 17 flows onto the horizontal surface 1.
After passing through 9, the water flow changes to a smoothly rising water flow. and,
It is very advantageous to create a large circular water flow while rising in the washing tub 2, and is substantially different from the conventional configuration shown in FIG. 1, which produces a small full water flow.

i! , ri, 1st. The sizes of the second circular arcs 22a and 22bid are set appropriately and are effective in forming an ascending water flow.

Further, as a result of various experiments regarding the depth H of the deepest part of the base 23, good results were shown when the depth H was set in a range of 10 to 20% of the radius of the stirring blade 4.

Next, the effect of the pile of stirring blades 4 on directly moving the clothes will be described. Since no mountain is formed in the hemispherical part 17 of the middle man of the base 23, clothes will not get caught in this part, and -!
In addition, the top 26 of the mountain 24 has the same or slight height difference with respect to the outer circumferential portion 21 of the stirring blade 4, so that there is no need to directly hook the cloth I thereon and turn it.

The top 26 of the mountain 24 extends from the center 20 to the outer periphery l52.
From a position near the midpoint of 1 to 1 or a position slightly closer to the outer periphery, the outward direction is approximately horizontal 27 and 17.
Since this is the part of Stirring@4 where the circumferential speed is the highest, and the rotational speed is low, it is less likely that the entire garment will be directly caught and turned.

In this way, the outer diameter d1 of the stirring blade 4, which has an effect based on its shape, is approximately 70 to 80% of the inner diameter d2 of the entire washing tub 2.
By increasing the number of rotations and keeping the number of rotations to about 200 rotations or less, a wide and slow water flow is generated in the washing tub 2, producing the effect of slowly moving the washed clothes.

Originally, in a whirlpool type washing machine, washing clothes f 1fi) +
The dross action is made up of two main elements: the element that moves the clothes along with the water flow, and the element that causes the clothes to be caught and rotated by the direct agitation blades 4, and this produces the cleaning effect.

So, when talking about the effects brought about by these two elements, the element that moves on the water flow is strong.

Clothes are less messy, kinked, and tangled, but the cleaning power is weak. A typical example of this is a water jet washing machine pressurized by a pump.

On the other hand, if the element of directly catching and rotating the clothes with the agitating blade 4 is strong, uneven washing and damage to the clothes will be large, and the kinks, kinks, and tangles will be thicker, and on the other hand, the cleaning effect will be thicker.

It is desirable to balance the two factors mentioned above, to suppress damage to clothes as much as possible, to reduce twisting and tangling of clothes, and to ensure basic cleaning power. In this way, the element of cleaning effect by water stream is increased, and the element of directly hooking clothes and stirring is reduced.

By adopting the configuration of the above-mentioned sister example, as shown in the table below, when the cleaning effect (cleaning degree) is maintained at the same level as the conventional product, there will be no uneven cleaning, damaged clothes, kinked clothes, and tangles. The cleaning level mentioned here is based on JIS-C-9 electric washing machine.
606, and the unevenness of washing is based on the standard deviation of the cleanliness of 40 contaminated cloths after four washing tests. This shows the weight loss when washing °1 20 times.

Next, FIG. 6 shows another embodiment in which the shape of the peak 24 is different from this embodiment.
21 to a position near the midpoint between t and tf, i
From position 34, which is closer to the outside of the young F, the top Fils
26 It is bent horizontally, the inward direction from the position 34 is in the F direction, and it is connected to the base 23 in the vicinity of the approximate midpoint between the position 34 and the center part 20. This also has the same effect as Honjine's example. In FIG. 6, the configuration other than the above is the same as that shown in FIG. 4, and the 8Gi'.

Ming is abbreviated.

In the non-implemented example, we explained the case where a fully automatic washing machine was equipped with an agitating blade, but the same effect can be achieved even if it is installed in the washing tub of a two-tub washing machine that is equipped with a washing tank and a dewatering tub. is obtained. In this case, the washing tub usually has a substantially rectangular planar shape, and the inner diameter d2 of the washing tub described above can be replaced with the distance across opposite sides of a square washing tub, and the same effect can be obtained. It is something that plays.

Effects of the Invention As is clear from the above practical example, according to the present invention, compared to the conventional example, the influence of the water flow can be increased, and the effect of directly hooking the clothes on the stirring blades and turning them is reduced, It maintains cleaning power at a high level, suppresses uneven cleaning, damage due to manual labor, kinks, and tangles to a low level, and can fully exhibit balanced washing performance.

In particular, from the horizontal plane of the base, a first circular arc and a second circular arc smaller than the first circular arc are connected, which allows upward water flow to occur completely smoothly and improves the agitation performance of the cloth. , the cleaning effect can be improved.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing the overall configuration of a conventional washing machine;
The figure is a longitudinal sectional view showing the overall structure of a washing machine according to an embodiment of the present invention, FIG. 3 is a plan view showing its stirring blade, FIG. Figures (A) to (H) are sectional views taken along the line A-H in Figure 3, and Figure 6 is a sectional view showing another embodiment of the stirring blade. 2... Washing tub, 4... Stirring blade, 1Y.
... Hemisphere part, 19 ... Horizontal plane, 2o ...
...center part, 21...-outer part, 22 a,
22 b--1st. Second arc, 23...base, 24...mountain, 26...subbe. Name of agent: Patent attorney Toshio Nakao Haga 1st person
1 Figure/θ 11 /D Figure 3 Figure 4 Figure 5 (A I (E) Figure 6

Claims (1)

[Claims] The central part has a spherical shape with 9 sides, a horizontal surface that descends toward the outer periphery, and a base that has an arc that rises from this horizontal surface toward the outer periphery. The base has a configuration in which it rises and connects to the outer periphery by arcs smaller than the nine arcs connected to the aforementioned arcs, and the depth dimension of the horizontal plane is set to the base. The stirring hole for a washing machine is set to about 10 to 2Q% of the radius dimension of the washing machine, and the outer diameter of the base is set to about 70 to 80 times the inner diameter of the washing tub.