JPS6334757B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a washing machine having rotary blades that rotate forward and reverse in short cycles within a washing tub.

[Prior art]

In recent years, instead of rotary blades that rotate forward and backward over a long period of time,
Attempts have been made to use large-diameter rotary blades that rotate forward and reverse in short periods in washing machines. Moreover, attempts have been made to provide a relatively long hollow cylinder at the top of the rotary blade, which rotates forward and backward in a short period of time, and to utilize this hollow cylinder as a detergent dispenser. However, during washing or rinsing operations, the laundry circulating in the washing tub may become entangled with the hollow cylinder, and to prevent this entanglement, ailerons are provided on the hollow cylinder. If the aileron is directly connected to the disc-shaped wing body, the heat contraction of the aileron caused by the temperature change after the rotor blade is formed will cause a large contraction of the connection part, causing the outer periphery of the disc-shaped wing body to change upward or downward. As a result of the deformation in the radial direction, the gap at the fitting part with the washing tub becomes larger, and as a result, the cloth gets stuck there, and there is a risk of cloth damage, motor locking, etc.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine which prevents deformation of the disk-shaped blade body due to the provision of ailerons and eliminates problems such as fabric damage and motor lock caused by this.

[Summary of the Invention] In a washing machine equipped with a rotary blade that rotates forward and backward in a short cycle at the inner bottom of the washing tub, the rotor blade includes a disk-shaped blade body and a hollow cylindrical body protruding above the center of the blade body. 13 and is made of synthetic resin, the wing body is provided with a plurality of main wings arranged radially when viewed from above, and a plurality of ailerons running vertically are arranged radially around the outer periphery of the hollow cylindrical body. The main wing and aileron are integrally formed with the rotor and synthetic resin, and when the rotor is viewed from above, the main wing and aileron overlap in position, and the lower part of the aileron and the center part of the main wing are continuous. The aileron wing, which is connected in a manner similar to the above, does not overlap the main wing in position, and extends to the disk-shaped wing body is characterized by having a lower part, which is the connection part with the wing body, cut out. .

[Embodiments of the invention]

EMBODIMENT OF THE INVENTION Hereinafter, this invention will be explained in detail based on Example drawing.

In Fig. 1, the washing machine has an outer frame 1 made of steel plate.
and a synthetic resin base 2 on which this outer frame 1 is placed.
and a synthetic resin washing tub 3 housed within the outer frame 1.
is formed integrally with this washing tub 3, and the outer frame 1
A synthetic resin water tank 4 housed inside, a dehydration tank 5 housed inside the water tank 4, a rotary blade 6 provided at the center of the bottom of the washing tub 3, and a rotary blade 6 that controls the rotation of the rotary blade 6. A control mechanism 7, a washing motor 8 serving as a driving source for the rotary blade 6, a dehydrating motor 9 serving as a driving source for the dehydrating tank 5, and an upper opening edge of the washing tub 3 and water receiving tank 4 located above the outer frame 1. It also includes an operation panel box 11 that can be used and removed at will.

The planar shape of the washing tub 3 is approximately rectangular when viewed from above. Ratio b/ of horizontal dimension b and vertical dimension a of washing tub 3
a is set to 0.9 to 1.1. The radius of curvature r ₁ , r ₂ , r ₃ , r ₄ of the side wall corner portion of the washing tub 3 is 50 mm to 150 mm.
Set to a range of The three radii of curvature r ₁ , r ₂ , r ₃ are
If set to 100mm or less, the remaining radius of curvature
Set r ₄ between 120mm and 140mm. Each side wall of the washing tub 3 has an arcuate curved surface that projects outward.
The radius of curvature R of this curved surface is set in the range of 1000 mm to 4000 mm. (See Figure 2) The radius of curvature r ₅ should be set between the side wall and the bottom of the washing tub 3.
Connect with a curved surface set in the range of 10mm to 50mm. The draft angle θ of the side wall of the washing tub 3 is set to 1/90 or less. (See Figure 3) The rotary blade 6 includes a disk-shaped blade body 12, a hollow cylinder 13 protruding above the center of the blade body 12, and a guide cylinder 14 provided inside the hollow cylinder 13. We are prepared. The wing body 12, the hollow cylinder 13, and the guide cylinder 14 are made of synthetic resin. (See FIG. 4) As shown in FIG. 5, the wing body 12 has three main wings 12a arranged radially when viewed from above. The main wing 12a has a width W in a range of 10 mm to 40 mm, and a height H in a range of 20 mm to 60 mm. The ridge of the main wing 12a is made into a smooth curved surface as shown in FIG. Fan-shaped portion 12b of the wing body 12
is an inclined surface rising toward the hollow cylinder 13, as shown in FIG. The inclination angle θ ₁ of this inclined surface
is set in the range of 5° to 20°. The apex angle θ ₂ formed on the extension of the inclined surface is set in the range of 170° to 140°.
The height H of the main wing 12a becomes smaller as it approaches the hollow cylindrical body 13 because the fan-shaped portion 12b is inclined.

As shown in FIGS. 4, 5, 7, and 8, two pairs of ailerons 13 are provided on the outer periphery of the hollow cylindrical body 13.
a are arranged radially. When viewed from above the rotor blade 6, the auxiliary blade 13a overlaps the main blade 12a at only one place. The lower end of the aileron 13a is connected to the main wing 12a, the hollow cylindrical body 13, and the disc-shaped wing body 12 by a smooth curved surface, and the height is partially increased as shown by the circle mark in the part that does not match the main wing 12a. It's getting lower. The ailerons 13a are continuous from the lower part to the upper part of the hollow cylindrical body 13, and have a shape in which the width dimension w and the height dimension h become smaller as they go upward in the hollow cylindrical body. The outer diameter of the hollow cylindrical body 13 itself also decreases as it goes upward.

A mounting boss 13b and a communication hole 13c are formed in the lower part of the hollow cylindrical body 13. A large number of water intake holes 13d are formed on the outer periphery of the hollow cylindrical body 13. Water intake hole 1
The water entering from 3d passes through the communication hole 13c and the back surface of the wing body 12 and returns to the washing tub 3 due to the pump action of the back surface of the wing body 12.

At the upper end of the guide cylinder 14, as shown in FIG.
Form a into one piece. The cap body 14a has a ring-shaped groove 14b, and the ring-shaped groove 14b has an inverted U-shaped cross section. At the lower part of the cap body 14a, a plurality of fitting ribs 14c are provided on the guide cylinder 14.
Provided integrally on the outer periphery of the The guide cylinder 14 is held at the center within the hollow cylinder 13 by a fitting rib 14c.

A nozzle 14d is formed at the lower end of the guide cylinder 14, as shown in FIG. A net-like water hole may be formed in the center of the guide cylinder 14. A lint filter 15 is installed around the outer periphery of the nozzle 14d. The lint filter 15 has a disk-shaped mesh portion 15
a, and a ring body 1 that is integrally provided on the outer periphery of this disc-shaped mesh portion 15a and that fits into the inner wall of the hollow cylinder body 13.
5b, and a fitting body 15c that is integrally provided at the center of the disc-shaped net portion 15a and that is detachably fitted to the nozzle 14d.

From the intake hole 13d of the hollow cylinder 13, the hollow cylinder 1
The lint that has flowed into the gap 13e between the guide cylinder 14 and the guide cylinder 14 is deposited on the lint filter 15. The outer diameter of the hollow cylinder 13 is set to 40 mm to 70 mm. The ratio D/a between the diameter D of the blade body 12 of the rotary blade 6 and the vertical dimension a of the washing tub 3 is in the range of 0.6 to 0.8.

The rotation control mechanism 7 is fixed to the external bottom surface of the washing tub 3 using a mounting plate 16. The rotation control mechanism 7 includes a gear reduction mechanism 17, an output shaft 18 of the gear reduction mechanism 17, an input shaft 19 of the gear reduction mechanism 17, a driven pulley 20 fixed to the input shaft 19, and a washing motor 8. Drive pulley 21 fixed to the rotating shaft
and a belt 22 attached to this drive pulley 20.
It consists of A mounting boss 13b for the rotary blade 6 is attached to the upper end of the output shaft 18.

The rotation of the washing motor 8 is decelerated to a range of 1/7 to 1/11 by the rotation control mechanism 7 and transmitted to the rotary blade 6. The rotation speed of the rotor blade 6 is 100 rpm ~
Set to 250rpm range. The washing motor 8 is
A single-phase induction motor with a four-pole capacitor star run is used. The washing motor 8 is made of anti-vibration rubber 23
It is fixed on the base 2 via the. The rotation angle of the rotary blade 6 is set in the range of 360° to 1080° in both forward and reverse directions.

A hollow ring-shaped fluid balancer 5a filled with saline is provided at the upper end of the dehydration tank 5. The rotating shaft 5b of the dehydrating tank 5 is directly connected to the rotating shaft of the dehydrating motor 9 through a coupling 24. At the bottom of the water receiving tank 4, a bellows 25 is provided which serves both as a vibration-proof bearing for the rotating shaft 5b and as a water seal. The dewatering motor 9 is supported on the base 2 in a vibration-proof manner by a vibration-proof spring 26 and a vibration-proof rubber tube 27. The dehydration tank 5 is made of synthetic resin and operates at 50Hz.
It rotates at 1400rpm at times and 1700rpm at 60Hz.

A dehydration inlet 10a is provided at the upper end opening of the water receiving layer 4.
A dehydration cover 10 having a dehydration cover 10 is provided. At the upper end opening of the washing tub 3, as shown in FIGS. 1 and 2,
A washing inner lid 28 and a washing lid 29 covering the washing inner lid 28 are provided. On the dehydration cover 10, as shown in FIG.
A dehydration lid 31 is provided to cover the container. Laundry inner lid 28,
The washing lid 29, the dehydration inner lid 30, and the dehydration lid 31 are all made of synthetic resin.

The dehydration inner lid 30 is provided with a slit-shaped portion 30a so that the dehydration tank 5 can be seen when the dehydration lid 31 is opened. The washing inner lid 28 has a recess 28a, an outlet 28b provided in the center of the recess 28a, and a recess 28a.
A wrinkle-shaped water sprinkling hole 28c provided at 8a is provided. The outlet 28b is located directly above the hollow cylindrical body 13 of the rotary blade 6 when the washing inner lid 28 is closed.
The bottom surface of the recess 28a is gently inclined toward the outlet 28b. The washing inner lid 28 and the dehydrating inner lid 30 can be opened/closed or detached. Laundry lid 2
9 and the dehydration lid 31 are detachable.

The operation panel box 11 houses electrical components constituting an electric circuit that controls the washing motor 8 and the like. A water supply port 11a is formed in the center of the upper surface of the operation panel box 11, to which a water supply hose connected to a water faucet or the like can be attached. A water passage 11c is provided in the operation panel box 11 so that water entering from the water supply port 11a flows out from an outlet 11b provided at the lower front of the operation panel box 11.

The water flowing from the outlet 11b is connected to the outlet 11b and the recess 28a so that it falls onto the recess 28a.
Determine the shape of. The water flowing from the outlet 11b is made to spread over the entire surface of the recess 28a.
The upper surface of the inner washing tub 28 is located below the upper surface of the washing tub 3 so that the water overflowing from the recess 28a does not overflow outside the outer frame 1.

The washing motor 8 is rotated forward and backward in extremely short cycles by a timer 32 and a group of select switches 33. The timer 32 includes at least three cam switches C ₁ , C ₂ , C ₃ , a main switch _MS , and a timer motor that drives the cass switches C ₁ , C ₂ , C ₃ . The select switch group 33 includes at least three manual changeover switches S ₁ , S ₂ , and S ₃ . The select switch group 33 is configured so that when any one of the manual changeover switches S ₁ , S ₂ , and S ₃ is closed, the remaining two switches are opened.

The rotational direction and energization time of the washing motor 8 are determined by the timer 32 and the select switch group 33.
The settings can be made as shown in Figure 1. That is, when the manual changeover switch S ₁ is closed, the washing motor 8 is energized in the forward direction for 0.8 to 0.9 seconds, then de-energized for 0.5 seconds, and then energized in the reverse direction for 0.8 seconds.
Power on for ~0.9 seconds. This energization mode is repeated multiple times until the main switch _MS is turned off.

When the manual changeover switch S ₂ is closed, the washing motor 8 is energized in the forward direction for 0.8 seconds to 0.9 seconds - de-energized for 0.5 seconds
The energization pattern of 0.8 to 0.9 seconds - energization in the reverse direction - 2.6 seconds of de-energization is repeated multiple times until the main switch M _S is turned off.

When the manual changeover switch S ₃ is closed, the washing motor 8 is energized in the forward direction for 0.6 seconds, de-energized for 0.4 seconds, and reversed for 0.6 seconds.
Repeats multiple times until _MS expires.

The mode of energization of the washing motor 8 is not limited to that shown in FIG. 11, but the energization time in the forward rotation direction and the reverse rotation direction is in the range of 0.6 seconds to 1.5 seconds, and the non-energization time is in the range of 0.6 seconds to 1.5 seconds. can be freely combined within the range of 0.4 seconds to 3.0 seconds. Therefore, it is possible to set the energization time of the washing motor 8 according to the type of clothes, or the energization time of the washing motor 8 according to the amount of clothes (load amount), and it is possible to set the energization time of the washing motor 8 according to the type of clothes. Can accommodate a wide variety of tastes. Further, even if the washing motor 8 is electrically designed to have the same characteristics in both forward and reverse directions, the torque in either direction will be greater. Therefore, by setting the energization time of the laundry motor in the rotational direction with low torque to be longer than the energization time in the rotational direction of the laundry motor with high torque, the rotation angle of the rotary blade 6 in either the forward or reverse direction can be made almost the same. You can also.

FIG. 12 shows the ratio b/a between the horizontal dimension b and the vertical dimension a of the washing tub 3, and the movement of laundry in the washing tub 3 (hereinafter referred to as
(referred to as cloth movement). As can be seen from FIG. 12, as the ratio b/a increases, the movement of the cloth becomes worse. In particular, when the ratio b/a becomes larger than 1.1, laundry begins to accumulate in the areas P ₁ , P ₂ , Q ₁ , and Q ₂ in FIG. 2, and the movement of the laundry becomes extremely slow.

FIG. 13 shows a characteristic curve of the radii of curvature r ₁ , r ₂ , r ₃ , r ₄ of the side wall corner portions of the washing tub 3 and the cleaning rate. As can be seen from Fig. 13, the radius of curvature r ₁ ,
When r ₂ , r ₃ , and r ₄ are greater than 150 mm, the laundry only rotates around the rotary blade 6, and the laundry is less likely to be swapped up and down, resulting in a sharp drop in cleaning efficiency. When the radius of curvature r ₁ , r ₂ , r ₃ , r ₄ becomes less than 50 mm, the laundry gets pushed into the corner of the side wall of the washing tub 3 and the movement of the laundry becomes poor, resulting in a sharp drop in the cleaning rate. do. When the width dimension b and the vertical dimension a of the washing tub 3 are set in the range of 380 mm to 440 mm, the first
The characteristics shown in Figure 3 are obtained.

FIG. 14 shows the rotation angle of the rotor blade 6, the cleaning rate,
Characteristic curves for fabric damage and fabric tangle are shown. The experimental conditions were the diameter D of the blade body 12 of the rotary blade 6 and the washing tub 3.
The ratio D/a to the vertical dimension a of the washing tub 3 is in the range of 0.6 to 0.8, and the ratio b/a of the horizontal dimension b to the vertical dimension a of the washing tub 3 is 1.0 to 0.8.
In the range of ~1.1, the rotational speed of the rotor 6 is 100 rpm ~
Set to 250rpm range. The reversal period of the rotor blade 6 is forward rotation 0.6 seconds to 1.2 seconds - pause 0.5 seconds to 3.0 seconds - reverse rotation
Set in the range of 0.6 seconds to 1.2 seconds. As can be seen from Fig. 14, the rotation angle of the rotor blade 6 is 360° (one rotation).
Below this, the laundry will hardly be shaken and the cleaning rate will drop sharply. When the rotation angle of the rotary blade 6 becomes 360° or more, the cleaning rate increases rapidly. Fabric damage and fabric tangle increase as the rotation angle increases, and increase rapidly when the rotation angle exceeds 1080°.

FIG. 15 shows the rotational speed of the rotor blade 6, the cleaning rate,
Characteristic curves for fabric damage and fabric tangle are shown. Ratio D/
a, the ratio b/a and the reversal period of the rotor 6 are the 14th
Set up as shown in the figure. The cleaning rate depends on the rotation speed.
At low speeds below 100 rpm, the speed decreases significantly, and at speeds above 250 rpm, fabric damage rapidly progresses.

In order to obtain the cleaning rate, cloth damage rate, and cloth entanglement rate necessary for putting the washing machine into practical use in a configuration in which a large rotary blade 6 is rotated forward and backward in a short period in a rectangular washing tub 3, the 14th As shown in the figure and FIG. 15, the rotation angle of the rotor blade 6 is set in the range of 360° to 1080°
In addition, it is necessary to set the rotational speed of the rotary blade 6 within a range of 100 rpm to 250 rpm.

The torque required for the rotary blade 6 to rotate the laundry and water at 100 rpm to 250 rpm is approximately 200 kg·cm. To obtain this large torque, it is impossible to use an 8-pole or 12-pole motor.
Since the reduction ratio of No. 7 becomes smaller and the shaft output torque of the motor must be increased, the motor becomes larger and heavier. When a 4-pole capacitor motor is used, the reduction ratio of the gear reduction mechanism 17 can be set to 1/11 to 1/7, and the shaft output torque of the motor is 28 kg·cm to 18 kg·cm. The washing motor 8 can be made smaller and lighter by using a four-pole capacitor motor. If the rotation speed at 50Hz of washing motor 8 using a 4-pole capacitor motor is 1380 rpm,
The rotation speed of the rotary blade 6 is 125 rpm to 197 rpm, and the rotation speed of the washing machine motor 8 is 60 Hz.
1674 rpm, and the rotation speed of rotor 6 is 152 rpm ~
It becomes 239rpm.

FIG. 16 shows another embodiment of the rotor blade 6.
The same symbols as in the figures represent the same contents. The upper end of the guide cylinder 140 made of synthetic resin includes a large-diameter portion 140a that fits into the hollow cylinder 13, a flange portion 140b that engages with the upper edge of the hollow cylinder 13, and a cap that also serves as a detergent meter. 34 is attached to the press-fit fitting part 14
0c is formed. At the lower end of the guide cylinder 140,
A nozzle 140d that also serves as a mounting portion for press-fitting and fixing the lint filter 15 is formed. The central portion 140e of the guide cylinder 140 maintains a gap with the hollow cylinder 13 by having an outer diameter smaller than that of the large diameter portion 140a. Central portion 140e of guide cylinder 140
A large number of water holes 140f are formed in the. The cap body 34 is formed with a ring-shaped groove 34a, and the detergent is measured using the ring-shaped groove 34a. Along with marking the cap body 34,
By molding the cap body 34 from a transparent material, the work of measuring detergent can be facilitated. The lint filter 15 may be attached to the hollow cylindrical body 13, or may be set so as to maintain a minute gap with the hollow cylindrical body 13.

In the above configuration, the timer 32 is set,
When one of the manual changeover switches S ₁ , S ₂ , and S ₁ is turned on, the washing motor 8 is energized as shown in FIG. do.

When the rotary blade 6 rotates forward and backward in a short period, the laundry in the washing tub 3 flows in the direction of the arrow in FIG. 17, and also rotates forward and reverse around the hollow cylinder 13 in a short period. At that time, the laundry and manual changeover switches S ₁ , S ₂ ,
Depending on how S ₃ is selected, laundry may become entangled on the outside of the hollow cylindrical body 13.

Even if the laundry gets tangled on the outside of the hollow cylindrical body 13, the aileron 13a keeps the laundry in close contact with the outer wall of the hollow cylindrical body 13 and prevents the laundry from getting wrapped around the outside of the auxiliary vane 13a. Since the laundry is in contact with only the ends, the force with which the laundry is entangled with the hollow cylindrical body 13 is weakened, and the laundry can be separated from the hollow cylindrical body 13 by pulling it upward.

Even if the laundry entangled on the outside of the hollow cylindrical body 13 is pulled upward, the laundry will move upwards smoothly because the aileron 13a is continuous from the bottom to the top of the hollow cylindrical body. Moreover, since the laundry does not get caught on the aileron 13a, the laundry is not damaged.

However, as shown in FIG.
If the lower end of a is connected to the disk-shaped blade body 12 at the same height, the blade body 12 will be deformed due to shrinkage after the auxiliary blade 13a is molded, and the gap at the fitting part with the washing tub 3 will become uneven. There is a risk that laundry may get caught in this gap and cause damage to the fabric, or that the fabric may get stuck and prevent the rotation of the rotary blades 6, thereby locking the motor 8 and causing a fire.

In this embodiment, in order to avoid the influence of shrinkage of the aileron 13a after molding, the height of the aileron 13a is partially lowered at the connection part with the disc-shaped wing body 12. deformation can be prevented.
(The upper end of the aileron 13a is lowered with a recess of 15 mm.) Also, the upper end of the aileron 13a is placed away from the fitting part of the lint filter 15 to prevent it from deforming due to shrinkage after molding. It ends at the same position.

〔Effect of the invention〕

As described above, the present invention provides a washing machine equipped with a rotary blade that rotates forward and backward in a short period at the inner bottom of the washing tub, in which the rotor blade includes a disc-shaped blade body and a protrusion extending above the center of the blade body. The wing body is provided with a plurality of main wings arranged radially when viewed from above, and the outer periphery of the hollow cylinder is provided with ailerons that run vertically. A plurality of main wings and ailerons are arranged radially, and the main wings and ailerons are integrally formed with the rotor and synthetic resin, and the main wings and ailerons, which overlap in position when viewed from above, are located at the bottom of the ailerons and near the center of the main wing. The aileron wing is connected in a continuous manner, does not overlap with the main wing positionally, and extends to the disc-shaped wing body, and is characterized by having a lower part, which is the connection part with the wing body, cut out. It is something to do. ” According to this configuration, the following advantages can be expected.

(1) Since the aileron wing has a cutout in the lower part that connects it to the disc-shaped wing body, no dents will be made on the outer periphery of the wing body due to heat shrinkage during molding of the rotor wing.

(2) Since there are no dents on the outer periphery of the blade body, there is no chance of cloth getting tangled in the gap between the washing tub and the rotary blade, preventing cloth damage or motor locking.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the present invention, Figs. 2 and 3 are explanatory diagrams of the shape of the washing tub, Fig. 4 is an enlarged sectional view of the main parts, and Fig. 5 is the same as in Fig. 4. 6 is a sectional view of FIG. 5, FIG. 7 is a sectional view of FIG. 4, FIG. 8 is a sectional view of FIG. 4, and FIG. 9 is a partially cutaway perspective view. Figure, 10th
The figure is an electric circuit diagram, Figure 11 is a diagram of the relationship between the energizing time of the washing motor and switches, Figure 12 is a characteristic curve diagram of cloth movement and ratio b/a, and Figure 13 is a diagram of washing ratio and side wall corner of the washing tub. Figure 14 is a characteristic curve diagram of the radius of curvature of the part, Figure 14 is a characteristic curve diagram of the cloth entanglement rate, cloth damage rate, and cleaning ratio, and the rotation angle of the rotor blade. Figure 15 is a characteristic curve diagram of the cloth entanglement rate, cloth damage rate, and cleaning ratio. , a characteristic curve diagram of the rotational speed of the rotor blade, FIG. 16 is an enlarged cross-sectional view of the main part showing another embodiment of the present invention, FIG. 17 is an explanatory diagram of the movement state of laundry in the embodiment of the present invention, and FIG. 18 is a conventional example. 3... Laundry, 6... Rotating blade, 13... Hollow cylindrical body, 1
3a...Ailerons.

Claims (1)

[Scope of Claims] 1. A washing machine equipped with a rotary blade that rotates forward and backward in a short cycle at the inner bottom of the washing tub, wherein the rotor blade has a disc-shaped blade body and a hollow hole protruding above the center of the blade body. The main wing body is provided with a plurality of main wings arranged radially when viewed from above, and ailerons running vertically are arranged radially around the outer periphery of the hollow cylindrical body. The main wings and ailerons are integrally formed using a rotor and synthetic resin, and the main wings and ailerons overlap in position when looking at the rotor from above. The aileron wing is connected in a continuous manner, does not overlap the main wing positionally, and extends to the disc-shaped wing body, and the aileron wing is characterized in that the lower part, which is the connection part with the wing body, is cut out. washing machine.