JP6502087B2 - How to design a washing machine - Google Patents

Description

The present invention relates to a method for designing a washing machine capable of suppressing vibration and noise.

  Conventionally, a washing machine is generally known that supports a substantially cylindrical bottomed outer tank inside a box-shaped casing and rotatably supports a washing and dewatering tank which is an inner tank inside the outer tank. (See, for example, Patent Document 1).

  FIG. 4 is a longitudinal sectional view schematically showing an example of such a common washing machine 101. As shown in FIG.

  The outer tank 105 and the inner tank 106 are coaxially disposed in the internal space Sp of the housing 2, and a stirring blade 63 is provided on the bottom plate 161 of the inner tank 106. Furthermore, below the bottom plate 151 of the outer tank 105, a drive mechanism 107 capable of selectively rotating the inner tank 106 and the stirring blade 63 is provided.

  The outer tub 105, the inner tub 106, and the drive mechanism 107 constitute one washing tub unit 104, and the washing tub unit 104 is suspended inside the housing 2 via the hanging rod 103. The hanging rod 103 is disposed with a predetermined angle θ inclined, and the base end 103A side is attached to a hook 25 provided near the upper end 24 of the housing 2 and the tip 103B side is a peripheral wall 152 of the outer tank 105. The washing tub unit 104 is elastically supported by being attached to the suspended support portion 53 provided at the lower part of the housing via the damper mechanism 31. By doing this, it is possible to suppress excessive vibration due to the rotation of the inner tank 106 and the stirring blade 63 at the time of washing or dewatering.

  Here, the width and depth dimension of the installation place where the washing machine 101 is installed as described above are restricted by the waterproof board and the floor plan of the house. That is, the installation area of the washing machine 101 can not be increased beyond a certain level. Furthermore, the washing machine 101 is designed to be as large as possible in terms of washing capacity as much as possible in order to be able to wash a large amount of laundry at one time, so the whole washing machine 101 is vertically long.

  Then, the washing tub unit 104 which is vertically elongated similarly to the housing 2 is present from near the upper end 24 to near the bottom surface 21 so as to occupy most of the internal space Sp of the housing 2. In the washing tub unit 104, since the heavy driving mechanism 107 is disposed on the bottom plate 151 of the outer tub 105 that constitutes the washing tub unit 104, the gravity center position Pc exists below the center. Therefore, the height Hc0 of the gravity center position Pc0 of the washing tub unit 104 is about 30% of the height Hu from the installation surface F to the upper end 24 of the housing 2.

  Furthermore, in order to effectively suppress the swinging of the washing tub unit 104, it is preferable to attach the hanging rod 103 at substantially the same height position as the gravity center Pc0 of the washing tub unit 104. The reference numeral 53 is provided at the lower part of the peripheral wall 152 of the outer tank 105. Therefore, the distance Ls0 between the fulcrums to the suspended support 53 is longer than the hooking portion 25 which is the fulcrum to which the hanging rod 103 is attached.

JP, 2011-240041, A

  As described above, in the conventional washing machine, the center of gravity of the washing tub unit is at a low position, but the swinging of the washing tub unit along with the rotation of the inner tub and the stirring blade due to the long distance between supporting points Tends to increase vibration and noise. Furthermore, it is necessary to set a clearance between the peripheral wall of the outer tub and the housing so that contact with the housing does not occur even when the washing tank unit swings, and this clearance becomes a dead space. Washing capacity is limited.

The present invention aims at effectively solving such a problem, and specifically, while suitably suppressing the vibration and noise of the washing tub unit, the gap between the peripheral wall of the outer tub and the casing is small. Purpose is to provide a washing machine design method that can reduce the dead space.

  The present invention takes the following means in order to achieve such an object.

That is, the method for designing a washing machine according to the present invention comprises a box-shaped casing having an internal space opened upward, and a washing tub unit suspended by a hanging rod in the internal space, and the washing The tank unit has a bottomed substantially cylindrical outer tank, and a bottomed substantially cylindrical inner tank coaxially disposed inside the outer tank and rotatably supported by the outer tank, and the outer tank A lifting mechanism provided at the lower end of the housing for driving the inner tank to rotate, and the hanging rod is attached to a hooking portion serving as a fulcrum provided near the upper end of the casing at the base end side, In a washing machine which is attached to a suspended supporting portion serving as a fulcrum provided on the lower side of a peripheral wall of the outer tub with its ends inclined so that the tips approach each other , the center of gravity of the washing tub unit together with the suspended supporting portion Higher than the height center of the vertical direction of the body In setting the without changing the angle of the hanger bar, as well as shorten the distance between the fulcrum of the suspension rod, to increase the diameter of the outer tub, the wall and the peripheral wall of the outer tub of the housing It is characterized in that the gap is reduced .

Further, in the present invention, it is preferable that the shape of the casing is not changed in setting the center of gravity of the washing tub unit together with the suspended support portion at a position higher than the vertical height center of the housing .

  Furthermore, according to the present invention, the drive mechanism selectively drives the inner tank and the agitating blade provided at the bottom of the inner tank by transmitting the rotational force of a motor. The depth is preferably set in the range of 50% to 70% of the diameter of the inner tank.

  And as for this invention, it is suitable for a storage part to be provided under the above-mentioned washing tub unit.

  Furthermore, according to the present invention, preferably, the storage portion is a drawer.

  According to the present invention described above, the washing tub unit is suspended and supported by the hanging rod with the upper end of the housing as a fulcrum, and the center of gravity is set to a position higher than the vertical height center of the housing. Since vibration generated when the inner tank is rotated by the drive mechanism is reduced, vibration and noise can be reduced. Furthermore, since the gap between the peripheral wall of the outer tub and the casing can be made smaller and the dead space can be reduced by the smaller amount of swinging, the diameters of the outer tub and the inner tub constituting the washing tub unit are increased accordingly. By doing this, the washing capacity can also be increased.

  Further, according to the present invention, in which the hanging support portion to which the tip end side of the hanging rod is attached is set at a position higher than the vertical height center of the housing, the dimensions of the housing and the mounting position of the hanging rod to the housing are When set in the same manner, the distance between the fulcrums for supporting the washing tub unit is shortened by the hanging rod. Therefore, the swing of the washing tub unit can be further reduced, and vibration and noise can be further reduced. Further, by shortening the distance between the fulcrums while setting the hanging rod to a predetermined angle, it is possible to position the peripheral wall of the outer tank in the outer diameter direction more than the conventional one and reduce the dead space. Furthermore, since it is also possible to reduce the gap between the outer tank and the housing and the gap between the outer tank and the inner tank by reducing the vibration, the diameters of the outer tank and the inner tank are increased to increase the washing capacity. You can also

  Further, according to the present invention in which the depth of the inner tank is set in the range of 50% to 70% of the diameter, the falling of the inner tank relative to the outer tank is reduced without impairing the washing performance as a washing machine. Therefore, the gap between the outer tank and the inner tank can be reduced to further increase the washing capacity, and the amount of waste water (so-called dead water) injected between the outer tank and the inner tank during washing can be increased. It is possible to reduce. In addition, when the diameter is the same as that of the conventional case, the inner tub becomes shallow, which makes it easy to take out the laundry. In addition, as the distance between the laundry and water on the upper part of the inner tank and the stirring blade becomes relatively close, the stirring force by the stirring blade is easily transmitted, so the capacity of the motor can be reduced, and the manufacturing cost and consumption can be reduced. Energy can also be reduced.

  Furthermore, according to the present invention in which the storage portion is provided below the washing tub unit, the space formed below the washing tub unit can be effectively used to further improve usability.

  In particular, according to the present invention in which the storage unit is a drawer, it can be used as a storage space for laundry-related detergents, softeners, or instruments, and the usability can be further improved.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the washing machine which concerns on one Embodiment of this invention. The longitudinal cross-sectional view which shows the washing machine typically. The perspective view which shows the washing machine. The longitudinal cross-sectional view which shows an example of the conventional washing machine typically.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a washing machine 1 according to an embodiment of the present invention. The washing machine 1 has a substantially rectangular shape in plan view, and FIG. 1 shows the washing machine 1 cut at a diagonal position. Further, this drawing shows a schematic configuration of the washing machine 1, and a part irrelevant to the present invention is partially omitted. In this figure, the same parts as those of the conventional washing machine 101 shown in FIG.

  The washing machine 1 of the present embodiment shown in FIG. 1 is configured as a so-called vertical washing machine, and includes a housing 2 and a washing tub unit 4 suspended and supported by a hanging rod 3 inside thereof. Furthermore, the washing tub unit 4 has a bottomed substantially cylindrical outer tub 5, a bottomed substantially cylindrical inner tub 6 coaxially disposed inside the inside, and a drive mechanism 7 provided at the bottom of the outer tub 5. And

  The housing 2 is formed of a substantially rectangular bottom surface 21 and four wall surfaces 22 rising from the bottom surface 21 and has a box shape including an internal space Sp opened upward. And the legs 23 are provided at the four corners of the bottom surface 21. The height in the vertical direction of the housing 2 in the present embodiment includes such legs 23 and is defined as the height from the installation surface F to the upper end 24 of the housing 2. Hook-like hooking portions 25 are provided at four corners in the vicinity of the upper end 24 of the housing 2, and the hooking portion 25 suspends the hooking bar 3 by hooking the base end 3A side of the hooking bar 3. Act as a fulcrum for

  A cover 26 integrated with the operation panel is provided on the top of the housing 2, and a part of the cover 26 is an open / close lid 26a, as shown in FIG. By being changed, the internal space Sp can be opened and closed.

  Returning to FIG. 1, the outer tub 5 constituting the washing tub unit 4 is a bottomed, substantially cylindrical member having a bottom plate 51 having a substantially circular shape in plan view and a peripheral wall 52 rising from an edge of the bottom plate 51 forming a bottom portion. is there. At the lower part of the peripheral wall 52, hook-like suspended support portions 53 are provided integrally at four locations in plan view. The hanging support portion 53 can attach the tip 3 B side of the hanging rod 3.

  The inner tank 6 is configured as a so-called washing and dewatering tank, and has a bottomed, substantially cylindrical shape having a bottom plate 61 having a substantially circular plan view and a peripheral wall 62 rising from an edge of the bottom plate 61 forming a bottom. The inner tank 6 is disposed coaxially with the outer tank 5 inside the outer tank 5, and is rotatably supported by the outer tank 5 via the drive mechanism 7. The bottom plate 61 and the peripheral wall 62 are provided with a large number of water flow holes (not shown), and the water in the inner tank 6 can be discharged through the water flow holes. Further, immediately above the bottom plate 61 of the inner tank 6, a stirring blade 63 generally referred to as a pulsator is coaxially provided.

  The drive mechanism 7 includes a base member 71 attached to the lower surface of the bottom plate 51 of the outer tub 5, a motor 72 attached to the base member 71, and a power distribution means 73 including a clutch. The motor 72 and the power distribution means 73 are respectively provided with a pulley 72a and a pulley 73a, and the endless belt 74 is wound around these pulleys 72a, 73a to mutually transmit power. Can.

  The power distribution means 73 includes two coaxially arranged output shafts 75 and 76, and the inner first output shaft 75 is connected to the center of the agitating blade 63, and the outer second output shaft 76 is It is connected to the bottom plate 61 of the tank 6. The power distribution means 73 outputs only the first output shaft 75 or both the first output shaft 75 and the second output shaft 76 as the output destination of the driving force input from the motor 72 through the pulley 73a based on an external command. Can be switched selectively. Therefore, the washing machine 1 can mainly rotate only the stirring blade 63 at the time of washing, and can rotate the inner tank 6 and the stirring blade 63 integrally at the time of dewatering.

  Four hanging rods 3 are provided corresponding to the four corners of the housing 2. The hanging rods 3 are slightly inclined so that the tips 3B are close to each other, and the base ends 3A are hooked to the hooking portions 25 of the housing 2 described above. A damper mechanism 31 including a coil spring 31A, which is an elastic member, is attached to the end 3B, and an upper end 31A of the damper mechanism 31 is hooked to a suspended support 53 provided on the outer tank 5. By doing this, the washing tub unit 4 including the outer tub 5 is suspended by the four suspension rods 3.

  FIG. 2 is a longitudinal sectional view schematically showing the washing machine 1. In this figure, the same parts as those in FIG. Hereinafter, the dimensional relationship of each part will be described in detail using FIG. 2 with reference to FIG.

  First, the height Hu of the housing 2 is defined as the dimension in the vertical direction from the installation surface F to the upper end 24 of the housing 2. In the present embodiment, the overall size of the housing 2 is set to be substantially the same as that of a conventional general washing machine (see FIG. 4), and the height Hu of the housing 2 is about 770 mm, which is the same as the conventional one.

  The bottom plate 61 of the inner tank 6 is set at a higher position than the conventional case, and the bottom plate 61 is shallower than the upper end 24 of the housing 2.

  Here, the depth Dp1 of the inner tank 6 is defined as the dimension in the vertical direction from the upper end 24 of the housing 2 to the lowermost portion of the upper surface of the bottom plate 61 of the inner tank 6. Defined as the maximum diameter of the inner surface of the peripheral wall 62 of the In the conventional common washing machine 101 (see FIG. 4), when the depth Dp0 and the diameter Di0 of the inner tub 106 are defined in the same manner as described above, the depth Dp0 of the inner tub 106 is generally about 110 of the diameter Di0. %, And some vertical.

  On the other hand, in the washing machine 1 of the present embodiment, the depth Dp1 of the inner tub 6 is set to about 60% of the diameter Di1, which is about half the depth of the prior art. Therefore, the laundry can be easily put in and out of the inner tub 6. Furthermore, since the height Hu of the housing 2 is the same as in the prior art, it is not necessary to bend the waist when taking out and in the laundry without the upper end 24 becoming too low.

  Furthermore, since the height from the bottom plate 61 supported by the inner tub 6 to the second output shaft 76 is also lower than the bottom plate 61, even when the laundry is inserted to the very edge of the upper end 64 The moment of rotation of the laundry is reduced, and the moment acting in the direction in which the inner tub 6 falls is also reduced. Therefore, since the relative displacement between the outer tank 5 and the inner tank 6 can be reduced, the gap Ci1 between the outer tank 5 and the peripheral walls 52 and 62 of the inner tank 6 can be reduced to the peripheral wall of the conventional outer tank 105 and the inner tank 106. It can be made smaller than the clearance Ci0 between 152 and 162. Specifically, the gap Ci1 is set to about 80% of the conventional gap Ci0. By doing this, it is possible to make the dead space smaller and to reduce waste water that is between the outer tub 5 and the inner tub 6 during washing, so-called dead water.

  In addition, the stirring power by the stirring blade 63 at the time of washing needs to be transmitted to the upper end 64 of the inner tank 6, but since the height to the upper end 64 is small, the stirring power may be set small. Absent. Therefore, the capacity of the motor 72 can be made smaller than that of the conventional motor 172, and the load resistance of the power distribution means 73 can be made smaller than that of the conventional power distribution means 173 to reduce the size and cost of the drive mechanism it can. In addition, the power consumption by the motor 72 can be reduced to reduce the running cost.

  Further, as the bottom plate 61 of the inner tank 6 is set to the high position as described above, the bottom plate 51 of the outer tank 5 and the drive mechanism 7 attached to the lower surface side thereof are also set to the high position. Therefore, the gravity center position Pc of the entire washing tub unit 4 is also set to a high position.

  Here, the height Hc1 of the center of gravity Pc1 of the washing tub unit 4 is defined as the dimension in the vertical direction from the installation surface F to the center of gravity Pc. When the height Hc0 of the center of gravity Pc0 of the washing tub unit 104 is defined in the same manner as described above in the conventional common washing machine 101 (see FIG. 4), the height Hc0 of the center of gravity Pc0 is generally the height of the housing 2 It will be about 40% of the Hu.

  On the other hand, in the washing machine 1 of the present embodiment, the height Hc1 of the center of gravity Pc1 of the washing tub unit 4 is larger than 50% of the height Hu of the housing 2. That is, when the half of the height Hu of the housing 2 is defined as the height center Hb in the vertical direction of the housing 2, the center of gravity Pc1 of the washing tub unit 4 is higher than the height center Hb. is there.

  Therefore, when the agitating blade 63 and the inner tank 6 are rotated by the drive mechanism 7, especially in the case of the dewatering operation in which the agitating blade 63 and the inner tank 6 are integrally rotated at high speed, the washing tank unit 4 tried to swing. Even in this case, since the upper end 24 of the housing 2 having the fulcrum of the suspension by the suspension rod 3 is close to the center of gravity position Pc1, the swing becomes smaller and the overall vibration and noise become smaller.

  Further, in the washing machine 1 in the present embodiment, with the bottom plate 51 of the outer tub 5 and the gravity center position Pc1 of the washing tub unit 4 set high, the suspended support portion 53 for attaching the tip 3B side of the hanging rod 3 The position is also higher than before. Specifically, the distance Ls1 between fulcrums to the hooking portion 25 for attaching the base end 3A of the hanging rod 3 and the suspended support 53 for attaching the tip 3B side is about 60% of the conventional distance Ls0 between fulcrums Shorten to Therefore, the vibration of the laundry tub unit 4 can be further reduced, and the vibration and noise can be further reduced.

  Moreover, length La1 of the hanging rod 3 can also be shortened by shortening the distance Ls1 between fulcrums. Specifically, when the same damper mechanism 31 as the conventional one is used, the length La1 of the hanging rod 3 becomes about 70% of the length La0 of the conventional hanging rod 103. Therefore, effects such as reduction of manufacturing cost of parts and further reduction of dead space in the housing 2 can be obtained.

  Furthermore, the hanging rods 3 are attached at an angle θ so that the tips 3B are close to each other. By doing this, a pulling force directed to the four corners acts on the washing tub unit 4 via the respective hanging rods 3, and the stability at the central position of the housing 2 in plan view can be enhanced. Specifically, the angle θ is set to about 9 ° as in the prior art.

  In the case of inclining the hanging rod 3 by a predetermined angle θ, the gap Co1 between the wall surface 22 of the housing 2 and the peripheral wall 52 of the outer tank 5 is set according to the distance Ls1 between supporting points to which the hanging rod 3 is attached. Is required. In the present embodiment, as described above, since the distance Ls1 between the supporting points is reduced to about 60% of the conventional distance Ls0 between the supporting points, the peripheral wall 52 of the outer tank 5 is positioned in the outer diameter direction to reduce the dead space And the gap Co1 can be made smaller than the conventional gap Co0. Specifically, the gap Co1 is set to about 80% of the conventional gap Co0, and the diameter of the outer tank 5 is increased accordingly.

  Then, in addition to setting the gap Ci1 between the outer tank 5 and the inner tank 6 smaller than the conventional gap Ci0 as described above, the gap Co1 between the wall surface 22 of the housing 2 and the peripheral wall 52 of the outer tank 5 By setting the gap smaller than the conventional gap Co0, the diameter Di0 of the inner tank 5 is increased accordingly. Specifically, the diameter Di0 of the inner tank 5 is set to about 115% of the diameter Di0 of the conventional inner tank 105, and the increase in the space in the radial direction can increase the washing capacity. Therefore, the washing capacity is not reduced in proportion to the reduction of the depth Dp1, and a sufficient washing capacity can be secured.

  Furthermore, in the washing machine 1 of the present embodiment, as described above, the entire washing tub unit 4 is attached upward, whereby the lower side of the internal space Sp is largely opened. Therefore, the drawer 8 as a storage part is provided using this space.

  FIG. 3 is a perspective view of the washing machine 1 and shows the drawer 8 drawn to the front side. In the lower part of the front side wall surface 22 of the washing machine 1, a rectangular opening 22a formed in a horizontally long shape is provided, and the drawer 8 is attached to the inside thereof. Thus, the dead space can be further reduced by effectively utilizing the space below the washing tub unit 4 (see FIG. 2). In addition, the drawer 8 is used as a storage space for detergents, bleaches and softeners necessary for washing, and appliances such as washing nets, and the arrangement around the washing machine which tends to be cluttered is facilitated to facilitate usability. It will be possible to improve

  The specific configuration of each part is not limited to the above-described embodiment.

  For example, although the storage unit 8 is configured as a drawer in the above-described embodiment, it may be configured as a storage shelf with an open / close door.

  Further, instead of providing the storage portion 8, various devices for adding an additional function may be appropriately incorporated and integrally configured.

  Furthermore, the dimensions of each part of the washing machine 1 are not limited to those described above and can be changed as appropriate.

  Other configurations can be variously modified without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1,101 ... Washing machine 2 ... Housing | casing 3, 103 ... Hanging rod 3A, 103A ... Base end (of a hanging rod) 3B, 103B ... Tip (of a hanging rod) 4, 104 ... Washing tank unit 5, 105 ... Outer tank 6, 106 ... inner tank 7 ... drive mechanism 8 ... drawer (storage part)
24 Upper end 51, 151 (bottom of housing) Bottom plate 52, 152: Peripheral wall 53: Suspension portion 61, 161: Bottom plate 62, 162: Peripheral wall 63: Agitating blade 72, 172: Motor 73, 173: Power distribution means Dp0 , Dp1 ... depth (of inner tank) Hb ... center of height of housing Hc0, Hc1 ... height of center of gravity (of washing tank unit) Hu ... height of housing Pc0, Pc1 ... (center of washing tank unit) Sp: Internal space θ: (Attachment rod) angle

Claims (5)

A box-shaped housing provided with an internal space opened upward,
And a washing tub unit suspended and supported by a hanging rod in the inner space;
The washing tub unit has a bottomed substantially cylindrical outer tub, and a bottomed substantially cylindrical inner tub coaxially disposed inside the outer tub and rotatably supported by the outer tub, And a drive mechanism provided at the lower end of the outer tank for rotating and driving the inner tank,
The hanging rod is attached to a hooking portion serving as a fulcrum having a base end side provided near the upper end of the housing, and a tip end supported on a suspended supporting portion serving as a fulcrum provided below a peripheral wall of the outer tank. In a washing machine, which is mounted inclined so that the
When setting the center of gravity of the washing tub unit together with the suspended support portion at a position higher than the vertical height center of the casing, the distance between the fulcrums of the suspension rods is set without changing the angle of the suspension rods. A method of designing a washing machine , characterized in that the diameter of the outer tub is increased and the gap between the wall surface of the housing and the peripheral wall of the outer tub is reduced while being shortened . The laundry according to claim 1, wherein the shape of the casing is not changed in setting the center of gravity of the washing tub unit together with the suspended support portion at a position higher than the vertical height center of the casing. How to design a machine. The drive mechanism selectively drives the inner tank and a stirring blade provided at the bottom of the inner tank by transmitting the rotational force of a motor.
The method for designing a washing machine according to claim 2, wherein the depth of the inner tub is set in the range of 50% to 70% of the diameter of the inner tub. The method for designing a washing machine according to claim 2 or 3, wherein a storage part is provided below the washing tub unit. The method for designing a washing machine according to claim 4, wherein the storage unit is a drawer.

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