JPS5934467Y2 - washing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a washing machine in which lint is forcibly captured by sending water in a washing tank to a lint catcher located at the top by a pumping action of an agitating blade.

Conventionally, in a two-tub washing machine in which a washing tank and a dewatering tank were installed side by side in an outer box, a pump was installed on the back side in a recess formed at a predetermined inclination angle at an eccentric position in the inner bottom of the washing tank. A pumping action is produced by arranging stirring blades having blades, and during the pumping action, water in the washing tank is sucked into the recess through an external pipe, and the discharged water is transferred to the recess. There is one in which the lint is forcibly captured by leading the water from the discharge port in the peripheral wall to the upper lint capture 5 via the water guide hose.

However, with such a conventional configuration, as will be understood later from the description in the detailed explanation section of the present invention, due to circumstances unique to washing machines, there is a gap between the opening edge of the recess and the outer periphery of the stirring blade. A large gap inevitably occurs, and a large amount of water in the recess is discharged from the gap during pump operation, resulting in a significant drop in the discharge pressure to the upper lint catcher.

For this reason, there was a drawback that the amount of water fed was reduced and the lint capture efficiency was reduced.

The present invention was made to eliminate the above drawbacks,
Its purpose is to place an agitating blade with a pump blade on the back in a recess formed at the inner bottom of the washing tank under the same circumstances as before, and the pumping action of the stirring blade creates a lint trap located at the top. The niff is a device that sends water to the area and captures lint there, and even if a large gap inevitably occurs between the opening periphery of the concave part and the outer periphery of the stirring blade due to circumstances unique to washing machines, the discharge pressure during pump operation is maintained. To provide a washing machine which can obtain a highly efficient lint capturing action and prevent fabric damage to the laundry due to friction between the laundry and an agitating blade as much as possible.

The present invention will be described below by way of an embodiment with reference to the drawings.

Reference numeral 1 denotes a washing tank of a two-tub washing machine that is arranged in parallel with a dehydration tank (not shown) in an outer box (not shown).

This washing tank 1 is integrally molded from synthetic resin.
A concave portion 1a for arranging the stirring blade 2 is formed at an eccentric position in the inner bottom thereof.

Here, the opening surface and inner bottom surface of the concave portion lad, which are parallel to each other (the dashed line A is shown as a plane parallel to this), resist α with respect to the central axis BVc of the tank 1 (which is also the die cutting direction). It is formed to have a predetermined inclination angle.

The stirring blade 2 has stirring protrusions 2 extending radially on its upper surface.
a, and a plurality of radially extending pump blades 2b are integrally provided on the back surface.

The wing piece 2b has a shape that protrudes more outwardly than at the center of rotation.

Further, a flat annular flange 2c is integrally formed on the outer periphery of the stirring blade 2 and extends further outward from the terminal end of the stirring protrusion 2a, and each blade piece 2b is formed on the back surface of the flat ring-shaped flange 2c. The surrounding cylinder part 2d is integrally formed so as to surround it.

This surrounding cylinder portion 2d is continuous with the radial end of each wing piece 2b and has a protruding dimension that is approximately half the height of the wing.

Reference numeral 3 denotes a washing shaft supported penetratingly on the bottom wall of the recessed portion 1a via a bearing mechanism 4, and a pulley 5 connected to the lower end thereof receives rotational force from the washing motor via a bell) 5a. There is.

Reference numeral 6 denotes a substantially annular pump casing with a discharge port 6a extending from a part of the peripheral wall, and this is for enclosing the rotating region of the blade 2b. An upper surface opening 6c is formed which is slightly larger in diameter than the outer diameter of the enclosing cylinder portion 2d of the stirring blade 2, and a guide protrusion is provided in the middle part of the discharge port 6a to increase water discharge efficiency during pump operation. Part 6
d.

Such a pump casing 6 is fixedly disposed within the recess 1a by screwing between the support protrusion 6e provided on the outer periphery of the pump casing 6 and the boss portion 1b provided within the recess 1a, and the stirring blade 2 is It is also connected to the upper end of the shaft 3 by screwing.

In this arrangement, the stirring blade 2 is located within the concave portion 1a, but in particular, the lower end periphery of the surrounding cylinder portion 2d is located close to the inner periphery of the upper surface opening 6c of the pump casing 6. As a result, the space in which the blades 2b are arranged and the pump chamber 1c have a substantially sealed structure between the back surface of the stirring blade 2 and the inside of the pump casing 6 by the surrounding cylinder part 2d. The flange portion 2c is located at the opening 1d portion of the recessed portion 1a.

Reference numeral I denotes a water discharge chamber, which is formed to bulge outward in the peripheral wall of the washing tank 1 in the form of a concave groove and extend from the road end of the washing tank 1 to the inner bottom 1, and its lower end portion is connected to the lower surface of the pump casing 6. It extends into the recessed portion 1a at a position 1 facing the recessed portion 1a, and this portion is defined as a suction chamber 7a lower than the inner bottom surface of the recessed portion 1a.

8 is a mortar case whose lower part forms a water passage 9, and a water discharge chamber I.
It is mounted in the suction chamber 7a with screws 10 and bosses 11.

This eye case 8 has a pump casing 6 when its left end surface in the figure comes into contact with the rising surface IC of the suction chamber 7a.
A notch is formed to serve as the suction port 12 that communicates with the inside, and a connection port 13 that fits with the discharge port 6a of the pump casing 6 is formed on the rising surface separated from this. A discharge chamber 14 that surrounds and separates from the water channel 9 is integrally formed, and a hose connection port 15 is formed at a position opposite to the connection port 13 in the discharge chamber 14YC.

16 is a groove-shaped opening γ of the water discharge chamber I facing the inside of the washing tank 1.
A cover member that covers the upper cover 17 and the lower cover 1
8, and a drainage strainer portion 20 is formed in the lower cover 18 by a large number of small holes 19.

A cutout 21 is formed on the lower end wall of the cut lower cover 18 to isolate the inside of the discharge chamber 14 from the water discharge chamber 7 by fitting into the outer periphery of the connection port 13 of the mortar case 8. A retaining claw piece 22 is provided to protrude and retain the retaining claw piece 22 to a suitable edge 23 of the water passageway 9.

24, connect the lower end 24a of the mortar case 8 to the boss connection port 1.
This is a water supply hose connected to 5.

Reference numeral 25 denotes a lint capturing section, and in detail, the lower end of the upper cover 17ti of the cover member 16 is connected to the upper end of the lower cover 18 via a retaining mechanism 26, and the upper end is connected to the retaining mechanism 27. The upper cover 11 is connected to the bottom wall 28a of the operation box 28 through the upper cover 11, and a capture chamber 29 with an open front is formed in the upper part of the upper cover 11, that is, in the part higher than the maximum set water level in the washing tank 1. , an inlet portion 30 is formed on the rear wall thereof, and the upper end portion 24b of the water supply hose 24 is connected to this inlet portion 30.

Reference numeral 31 denotes a lint catcher having a large number of water passage holes 32 formed in the front wall and the bottom wall. This is detachably attached to the catch chamber 29 via engagement mechanisms 33 and 34.

Reference numeral 35 denotes a drain port for constructing a drain mechanism 36, which is formed in a portion located in the water discharge chamber 7 in the lower wall of the washing tank 1, and a drain hose 37 is connected to this drain port.

Reference numeral 38 denotes a vertically elongated tube support disposed in the water discharge chamber 7. A connecting port 39 is integrally formed at the lower end of the tube support, and a tube support 3.38 is provided at the lower end of the connecting port 39. An annular valve body 40 is fitted around the drain port 35 as it moves up and down, and the lower end of the overflow pipe 41 is connected to the upper end.
This is held in an upright position.

This overflow pipe 41 is open at the top and bottom, and has a bellows shape that can be expanded and contracted between the middle and the vicinity 1 of the overflow port 42 at the upper end.

Reference numeral 43 denotes an operating member that is vertically movably supported in a guide groove 44 formed from the middle to the lower part 1 of the upper cover 17, and the overflow port 42 of the overflow pipe 41 is located at the end extending into the water discharge chamber I. The lower part of the neck is held in place.

This operating member 43 is arranged in a latch mechanism 45 so that it can be adjusted up and down in multiple stages, thereby raising and lowering the overflow port 42 to set the overflow water level.

Reference numeral 46 indicates an operation wire for vertically operating the tube support 38 using a switching knob (not shown) provided on the operation box 28, and 47 a control wire 5 for moving the tube support 38 so that the valve body 40 at its lower end abuts around the drain port 35. This is a compression spring that applies downward pressure.

The above structure corresponds to the water overflow mechanism 4t3, and the eye case 8 and the water supply hose 24 that connect the pump casing 6 and the lint catcher 31 correspond to the water guide mechanism 49.

Note that 50 is an engagement mechanism that holds the upper end of the lower cover 18 in the washing tub 1.

Next, the operation of the above configuration will be explained.

First, to explain the lint capturing action, during the washing or rinsing operation in which the stirring blade 2 rotates, a pumping action is produced in the pump casing 6 forming the pump chamber 1C by the blade 2b provided on the back surface of the stirring blade 2. The water in the water discharge chamber I is sucked into the pump casing 6 from the suction port 12 via the water passage 9 of the eye case 8, and is discharged from the navel's discharge port 6a through the connection port 13 of the eye case 8. is discharged into the chamber 14,
Furthermore, from here, the water supply hose 24 and the inlet part 3 of the capture chamber 29 are connected.
0 into the lint catcher 31, where the lint is separated and discharged into the washing tank 1.

The lint is forcibly captured by sending water to the lint trap 31 by the pumping action of the stirring blades 2.

In the case of the overflow rinsing operation, the water in the washing tank 1, and therefore the water in the water discharge chamber I which is in communication with the washing tank 1 via the drainage strainer part 20, flows from the overflow port 42 of the overflow pipe 41. A wet field, connecting mouth body 39 and drain port 35
is discharged from the aircraft through the

Furthermore, when the pipe support body 38 is raised by the operation wire 46 after rinsing or other operations are completed, the valve body 40 provided at the connection port body 39 communicating with the overflow pipe 41 is separated from the surroundings of the drain port 35. The water in the washing tank 1 is drained through a drainage strainer section 20,
The water is discharged through the water discharge chamber γ and the drain port 35 to the outside of the machine by a drain hose 37.

Next, pump action will be explained in relation to washing performance.

That is, the recessed part 1a for arranging the stirring blade 2 is the washing tank 1.
If the water is formed at the center of the inner bottom without any inclination, most of the water flow generated by the agitation protrusion 2aK of the agitation blade 2 will be a horizontal water flow, and the laundry will simply rotate on a horizontal plane, resulting in poor washing performance. decreases.

For this reason, conventionally, the concave portion 1a has been replaced with the washing tank 1 as described above.
It is formed at a predetermined inclination angle α at an eccentric position in the inner bottom of the holder.

According to this configuration, the water flow simultaneously forms a horizontal component and a vertical component, and the laundry repeats extremely complex movements throughout the entire area in the washing tub 1, so that washing performance is improved.

However, in this way, the recess 1 is located at an eccentric position of the washing tank 1.
aK If a predetermined angle of inclination α is given, the opening 1d of the recessed portion 1a will open as a result of cutting the die in the direction of the central axis B during integral molding.
was not a perfect circle, and a large gap X (see FIG. 1) inevitably occurred between it and the outer periphery of the circular stirring blade 2.

Therefore, this configuration is 11! When the blade 2 is provided with a pumping function, a large amount of water in the concave portion 1a flows out into the washing tank 1 through the gap X due to a negative pressure phenomenon caused by the water flow in the upper part of the stirring blade, and the pump discharge pressure decreases.

Therefore, the amount of water sent out by the lint trap 311 located at the upper portion is reduced, and the lint trapping efficiency is lowered.

On the other hand, according to the above-described embodiment of the present invention, the pump casing 6 that surrounds the pump blades 2b of the stirring blades 2 is provided in the concave portion 1a, so that the gap X as described above exists. The discharge pressure in the pump chamber 1C can be increased even if the pump chamber 1C is closed.

Therefore, the amount of water fed to the lint trap 31 also increases, increasing the lint trapping efficiency.

By the way, since the water suction port 12, in which a water flow toward the suction port 12 is generated due to such a water feeding action, is provided at the bottom of the concave portion 1a, the water flow is not large enough to suck the laundry into the suction port 12. It occurs below the stirring blade 2 and does not occur within the range in which the laundry in the washing tub 1 moves, so the laundry in the washing tub 1 is not drawn to the suction port 12.

On the other hand, if the suction port is provided on the upper surface of the pump casing, for example, a water flow toward the suction port is generated even in the area where the laundry moves in the washing tub, and this water flow acts directly on the laundry. Since the laundry is sucked toward the suction port, the chances of the laundry coming into contact with the stirring blades located near the suction port increase significantly, causing the laundry to rub against the stirring blades! /c has the disadvantage of causing fabric damage.

In this regard, in this embodiment, since the suction port 12 is provided at the bottom of the concave portion 1a, the water flow toward the suction port 12 does not act on the laundry, as described above, and therefore, the friction between the laundry and the stirring blades Damage to the fabric of the laundry due to misalignment can be prevented as much as possible.

In addition, the following effects can be expected according to the above embodiment.

That is, an enclosing cylindrical portion 2d is integrally provided on the back surface of the agitating blade 2 so that the blade 2b is surrounded by the back surface of the agitating blade 2 and the pump casing 6, and the lower end peripheral edge of the enclosing cylindrical portion 2d is surrounded by the pump casing 6. 6, the sealing performance of the pump chamber 1c with respect to the inside of the washing tank 1 is improved, and the discharge pressure during pump operation can be further improved.

On the other hand, another feature is that a flange 2c is formed on the outer periphery of the stirring blade 2, extending further outward from the radial end of the stirring protrusion 2a and positioned near the upper opening 1d of the concave portion 1a. .

That is, if the length of the stirring protrusion 2a in the radial direction is too long, the water flow in the horizontal direction becomes extremely strong and the water flow in the vertical direction becomes weak, resulting in a decrease in washing performance.

On the other hand, the number of revolutions of the stirring blade 2 is determined to be a predetermined value in relation to the threading performance.

On the other hand, the pump performance is unrelated to the washing performance and is inherently preferably as high as possible. Therefore, the blade 2b is required to have a long radial dimension to compensate for the restriction on the rotation speed. be done.

However, this cannot be met due to the size restriction of the stirring blade 2 as described above.

Although there are such circumstances peculiar to washing machines, according to the above structure according to the present invention, by forming the flange 2c on the outer periphery of the stirring blade 2, the radial length of the stirring protrusion 2a and the blade piece 2b can be reduced. can be set to a value according to individual requirements,
Moreover, it is possible to prevent the gap X from expanding more than necessary.

In addition, since the water guide mechanism 49 that connects the pump chamber 1c and the lint catcher 31 is arranged so as to pass through the water discharge chamber 1 formed inside the washing tank 1 instead of outside the washing tank 1, There is no sealing problem and the configuration is simple.

As described above, the present invention includes: a stirring blade which is arranged in a recess formed at a predetermined inclination angle at an eccentric position in the inner bottom of a washing tank, and has a pump blade protruding from the back surface; a pump casing ct disposed in the recess so as to surround a rotating region of the pump; The water discharged from the pump casing is guided to the lint catcher 5 located at the upper part of the pump. Even if a large gap inevitably occurs due to the circumstances, the discharge pressure during pump operation can be increased, a highly efficient lint capturing action can be obtained, and the fabric damage of the laundry caused by rubbing between the laundry and the stirring blade can be prevented. It is possible to provide a washing machine that can prevent this as much as possible.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a vertical cross-sectional side view of the main parts, Fig. 2 is an enlarged exploded perspective view of the pump action part, and Fig. 3 is a perspective view showing the pump casing turned over. It is a diagram. In the figure, 1 is a washing tank, 1a is a recessed part, 1c is a pump chamber, 1
d is an open port, 2 is a stirring blade, 2a is a stirring protrusion, 2b is a blade piece, 2c is a flange, 2d is a surrounding cylinder part, 6 is a pump casing, I is a water discharge chamber, 7b is a groove-shaped opening 12 is a suction port, 16 is a cover member, 2G is a drain strainer portion, 36 is a drain mechanism, 48 is a water overflow mechanism, and 49 is a water guide mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ It is arranged in a recess formed at a predetermined inclination angle at an eccentric position in the inner bottom of the washing tank, has a protrusion for stirring on the top surface, and has blades for a pump protruded on the back surface. a stirring blade provided therein; a pump casing disposed in the recess so as to surround the rotating region of the blade; and a pump casing arranged at the bottom of the recess to suck water in the washing tank into the pump casing. 1. A washing machine comprising: a suction port provided in a desired manner; and a water guide mechanism that guides water discharged from the pump casing to a lint catcher 5 located at the upper part. 2. A practical use characterized in that the stirring blade is provided with an enclosing cylindrical portion whose lower end periphery is close to the pump casing so as to surround the pump blade from the outer periphery between the back surface of the stirring blade and the pump casing. A washing machine according to claim 1 of the patent registration claim. 3. Registration of a utility model characterized in that the stirring blade is formed with a flange extending outward from the radial end of the stirring protrusion of the stirring blade so as to be located at the open opening of the concave part. A washing machine according to claim 1. 4. The washing tank has a water discharge chamber in the shape of a concave groove extending from the road end of the tank at the inner bottom 1 with a peripheral wall of the tank bulging outward, and a groove of the water discharge chamber facing the inside of the washing tank. a cover member that is removably provided to cover the shaped opening and has a drainage strainer section at the bottom; and a mechanism for discharging the water in the water discharge chamber to the outside of the machine as necessary; The washing machine according to claim 1 of the utility model registration claim, characterized in that the washing machine is arranged so as to pass through the discharge chamber.