JP5003461B2 - Washing machine - Google Patents

Description

  The present invention is a laundry which performs washing, rinsing and dehydration of laundry (and may be further dried) in a washing and dehydrating tub rotatably provided in an outer tub elastically supported in the washing machine body. Related to the machine.

2. Description of the Related Art Conventionally, a washing machine includes a vibration isolation leg device at a lower portion of a main body. This anti-vibration leg device comprises a flexible intermediate leg and a leg plate integrally formed of a material harder than the intermediate leg below the intermediate leg, and supported by the leg part. The primary resonance frequency of the main body is set to be lower than its dehydration frequency. Moreover, in order to reduce the vibration at the time of resonance of the main body, an intermediate leg having a large damping characteristic is used (for example, see Patent Document 1).
JP-A-1-185299

  In the case of the above configuration, there is an effect of reducing the vibration at the time of dehydration resonance and the vibration at the time of steady dehydration of the washing machine body during the dehydration operation. However, at the time of washing or dehydration activation, since the soft material is used for the intermediate leg, the vibration of the main body is increased.

  The present invention solves the above-mentioned conventional problems, and reduces the vibration of the main body not only at the time of dehydration resonance or dehydration steady state but also from the time of washing or dehydration activation to the time of dehydration steady state. The object is to reduce vibration transmission.

  In order to solve the above-described conventional problems, the washing machine of the present invention includes a washing / dehydrating tub having a rotating shaft in a substantially horizontal direction, an outer tub enclosing the washing / dehydrating tub, and the washing and dehydrating. The washing machine main body comprises a driving means for rotating the cum dewatering tub, a washing machine outer frame that slidably accommodates a swinging body mainly composed of the outer tub, and a fixed leg fixed to the bottom of the outer frame. A support member is provided inside the rubber leg, a buffer member is interposed between the shaft of the support member and the fixed leg, and the rubber leg for fixing the support member or the support for fixing the shaft of the support member is fixed. At least one of the plates is configured not to be fixed to the fixed leg.

  Since the rubber leg or the support plate is not fixed to the fixed leg as in the prior art, the horizontal vibration and the vertical vibration of the washing machine body can be buffered. As a result, main body vibration can be reduced, and vibration transmission from the rubber legs to the floor can be reduced, so that low vibration and low noise can be realized.

  In the present invention, since the rubber leg or the support plate is not fixed to the fixed leg, the horizontal vibration and the vertical vibration of the washing machine body can be buffered. As a result, main body vibration can be reduced, and vibration transmission from the leg rubber to the floor can be reduced, so that low vibration and low noise can be realized.

  In the first invention, since the rubber leg or the support plate is not fixed to the fixed leg, the horizontal vibration and the vertical vibration of the washing machine body can be buffered. As a result, main body vibration can be reduced, and vibration transmission from the leg rubber to the floor can be reduced, so that low vibration and low noise can be realized.

  According to a second invention, in particular, in the first invention, the shape of the fixed leg is configured by a substantially upward concave portion, so that the washing machine body is dragged when the washing machine body is installed or transported, or the washing machine body Even if the legs are inclined and the legs are moved alternately, the buffer member is prevented from being peeled off.

  According to a third aspect of the invention, in particular, in the first aspect of the invention, the shape of the fixed leg is constituted by a substantially downward recessed portion, so that the washing machine body is dragged when the washing machine body is installed or transported, or the washing machine body Even if the legs are inclined and the legs are moved alternately, the buffer member is prevented from being peeled off.

  In the fourth invention, particularly in the second or third invention, a gap is provided between the outer periphery of the cushioning member and the fixed leg recess body, or between the inner periphery of the cushioning member and the shaft of the support member. The outer periphery of the cushioning member and the fixed leg recess body are in contact with each other, or the shaft of the support member is in contact with the shaft of the support member when the lateral vibration during dehydration operation is large under heavy load or light load. By setting the size of the gap as described above, the buffering is applied in a low rotational speed region where lateral vibration during dehydration operation increases during heavy load during washing and dehydration start-up or light load, and during dehydration resonance. The rigidity of the member is high and the damping is also high. Therefore, resonance vibration can be suppressed. In the dehydration steady state where there is little lateral vibration, the buffer member does not hit the fixed leg recess body, and the buffer member does not hit the shaft of the support member. Therefore, the rigidity of the buffer member is low and the damping effect is low. In addition to reducing body vibration, vibration transmission to the floor can also be reduced.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, when the lateral vibration is large at the time of heavy load at the time of washing and dehydration activation, the surface of the fixed leg concave portion increases the area for pressing the rubber leg. The area can be maximized and the gripping power of the rubber legs can be maximized.

  According to a sixth aspect of the invention, in particular, in the fourth aspect of the invention, when the lateral vibration at the time of heavy load at the time of washing and dehydration activation is large, the seat portion of the fixed leg recess presses the rubber leg, so that the installation area becomes large and the rubber Since the grip force of the legs can be increased, it is possible to prevent the main body from moving during washing or dehydrating operation.

  According to a seventh aspect of the present invention, in the sixth aspect of the invention, when the lateral vibration at the time of heavy load at the time of washing and dehydration activation is large, the surface of the fixed leg concave portion increases the area for pressing the rubber leg. The area can be maximized and the gripping power of the rubber legs can be maximized.

  In an eighth aspect of the invention, in particular, in any one of the first to seventh aspects of the invention, by making the hardness of the rubber leg higher than the hardness of the buffer member, lateral vibration during heavy load at the time of washing and dehydration activation is achieved. The vibration reduction effect can be further increased in the low rotation speed region that becomes larger and during dehydration resonance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a washing machine according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of an anti-vibration leg device of the washing machine, and FIG. 3 is a vibration characteristic diagram of the washing machine body. .

  In FIG. 1, the washing machine outer frame 30 elastically supports an outer tub 33 by four tension springs 31 and two elastic bodies 32. The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33. The motor (driving means) 35 is composed of a brushless DC motor and is controlled by an inverter so that the rotation speed can be freely changed. Then, the washing / dehydrating tub 34 is directly driven. The water supply means 36 supplies water into the washing / dehydrating tub 34. The water level detection means 37 detects the washing water level in the outer basket 33. The drainage means 38 drains the washing water in the outer tub 33.

  The control device 39 is provided at the lower front portion of the washing machine outer frame 30. The control device 39 sequentially controls each step of washing, rinsing and dehydration based on the setting contents inputted by the operation display means 40 provided on the upper front surface of the washing machine outer frame 30. The power switching means (FIG. The motor 35, the water supply means 36, the drainage means 38, etc. are sequentially controlled via a not-shown).

  Anti-vibration leg devices 47 are provided at the four corners of the bottom of the washing machine body. As shown in FIG. 2, the anti-vibration leg device 47 has a buffer member 52 a disposed on the trunk portion 50 a and the receiving portion 51 formed on the fixed leg 48, and a portion formed by the trunk portion 50 b and the receiving portion 51. The buffer member 52b is disposed.

  The buffer members 52a and 52b are provided with through holes 53a and 53b in the center, respectively, and the support rod 55a of the support member 55 that supports the rubber legs 54 is inserted into the through holes 53a and 53b and supported on the top surface of the buffer member 52a. The plate 56 is disposed, and the screw portion 55b of the support bar is fixed by a stop member 57.

  In order to avoid an excessive increase in rigidity of the buffer member 52b due to excessive tightening of the stop member 57 or to prevent variation in rigidity of the buffer member 52b due to assembly, the rib tip of the body portion 50a formed on the fixed leg 48 and the support are supported. A gap is provided between the plate 56 and the fixed leg 48 so as to act as a stopper when the fixed leg 48 moves up and down.

  The weight of the washing machine body is applied to the buffer member 52b from the receiving portion 51 formed on the fixed leg 48, the buffer member 52b is compressed, and the buffer member 52b presses the rubber leg 54.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, after putting clothes and detergent into the washing and dewatering tub 34, the operation display means 40 is operated to start operation. As a result, the water supply means 36 operates, the washing water is supplied into the washing / dehydrating tub 34, and the washing / dehydrating tub 34 also starts rotating. When the specified amount of washing water is supplied, the water supply means 36 stops water supply. By the rotation of the washing and dewatering tub 34, the detergent is dissolved in the washing water and becomes a washing liquid and penetrates into the clothes. The washing and dewatering tub 34 rotates at a low speed of about 30 r / min, and performs washing for a specified time to lift and drop the clothes.

  In such a heavy load at the time of washing, the buffer member 52b is compressed, the force for suppressing the rubber leg 54 is increased, the rigidity of the buffer member 52b is increased, and the grip force of the rubber leg 54 is increased. Lateral vibration can be suppressed.

  After the washing is finished, the drainage means 38 is operated, and the washing water in which the dirt is dissolved is drained out of the outer tub 33. After the drainage is completed, the rotation of the washing and dewatering tub 34 is gradually accelerated and the dehydration process is started. At the time of dehydration activation, the outer tub 33 may move up and down greatly while swinging back and forth and left and right due to the unbalanced state of the laundry when the rotational speed of the washing and dewatering tub 34 is between 250 and 300 r / min. At the same time, the washing machine body shakes greatly from front to back and from side to side. As in the case of washing, the buffer member 52b is compressed, the force for holding the rubber leg 54 is increased, the rigidity of the buffer member 52b is increased, and the grip force of the rubber leg 54 is increased. Can be suppressed.

  When the rotational speed of the washing / dehydrating tub 34 increases and the rotational speed of the washing / dehydrating tub 34 becomes 600 to 750 r / min, the washing machine main body resonates. Thus, when the horizontal vibration of the washing machine main body becomes large, the buffer members 52a and 52b are pressed between the support rod 55a and the body portions 50a and 50b, and the horizontal vibration of the washing machine main body can be suppressed.

  When the rotation speed of the washing and dewatering tub 34 further increases, the operation is steady and the vibration of the outer tub 33 is reduced, but the washing machine main body is vibrated through the elastic body 32. At this time, since the clothes are dehydrated, the load is lighter than during washing or dehydration activation, the compression of the buffer member 52b and the force of the rubber leg 54 are reduced, and the rigidity of the buffer member 52b and the rubber leg 54 is reduced. .

  As a result, the vibration of the washing machine main body is reduced as shown in FIG. 3, and furthermore, since the rubber legs 54 are not fixed to the fixed legs 48, vibration transmission from the washing machine main body to the floor can also be reduced. Therefore, low vibration and low noise can be realized.

(Embodiment 2)
FIG. 4 shows a cross-sectional view of a vibration isolating leg device for a washing machine according to the second embodiment of the present invention.

  As shown in FIG. 4, the buffer member 52 is disposed at a location formed by the body portion 50 and the receiving portion 51 of the upward recess formed in the fixed leg 48. The buffer member 52 is provided with a through hole 53 in the center, a support bar 55a of a support member 55 that supports the rubber leg 54 is inserted into the through hole 53, a support plate 56 is disposed on the upper surface of the buffer member 52, and the support bar The screw portion 55b is fixed by a stop member 57.

  In order to avoid an extreme increase in rigidity of the buffer member 52 due to excessive tightening of the stopper member 57 or to prevent variation in rigidity of the buffer member 52 due to assembly, the rib tip of the body portion 50a formed on the fixed leg 48 and the support are supported. A gap is provided between the plate 56 and the fixed leg 48 so as to act as a stopper when the fixed leg 48 moves up and down. The weight of the washing machine body is configured to press the rubber legs 54 from the receiving portions 51 formed on the fixed legs 48.

  By configuring as shown in FIG. 4, when installing or transporting the washing machine body, even if the washing machine body is dragged or the washing machine body is slanted and the legs are moved alternately, the washing machine body Even when the lateral vibration of the shock absorber increases, the buffer member 52 is prevented from peeling off.

(Embodiment 3)
FIG. 5 shows a cross-sectional view of a vibration isolating leg device for a washing machine according to a third embodiment of the present invention.

  As shown in FIG. 5, the cushioning member 52 is disposed at a location formed by the body portion 50 and the receiving portion 51 of the downward recess formed in the fixed leg 48. The buffer member 52 is provided with a through hole 53 in the center, a support bar 55a of a support member 55 that supports the rubber leg 54 is inserted into the through hole 53, and a support plate 56 is placed on the upper surface of the buffer member 52 through the receiving portion 51. It arrange | positions and it is comprised so that the screw part 55b of a support bar may be fixed with the stop member 57. FIG. The clearance Sa between the receiving portion 51 and the support plate 56 is configured to be opened by about 1 to 3 mm when the washing machine body is installed.

  By configuring as shown in FIG. 5, when the washing machine body is installed or transported, the washing machine body can be dragged, the washing machine body can be slanted, and the legs can be moved alternately. Even when the lateral vibration of the shock absorber increases, the buffer member 52 is prevented from peeling off.

(Embodiment 4)
FIG. 6 shows a cross-sectional view of a vibration isolator device for a washing machine according to a fourth embodiment of the present invention.

  In FIG. 6, a clearance Sb between the outer periphery of the buffer member 52 and the body portion 50 of the fixed leg recess that supports the buffer member 52, and a clearance Sc between the through hole 53 of the buffer member 52 and the support rod 55 a of the support member 55. Is provided. When heavy load is applied during washing and dehydration start-up, or when the lateral vibration during dehydration operation is large under light load, the outer periphery of the buffer member 52 is in contact with the body 50 of the fixed leg recess, or the buffer member 52 penetrates. The dimension is set so that the hole 53 and the support rod 55a are in contact with each other.

  In this embodiment, both Sb and Sc are set to about 0.5 to 1.0 mm. 250 to 300 r / min in the low rotational speed region where the lateral vibration during the dehydration operation becomes large at the time of heavy load at the time of washing and dehydration start or light load, and 600 to 750 r / min at the time of dehydration resonance When the outer periphery of 52 is in contact with the body portion 50 of the fixed leg recess, or when the through hole 53 of the buffer member 52 and the support bar 55a are in contact, the rigidity of the buffer member 52 is increased and the damping is also increased. Therefore, the resonance vibration can be suppressed as shown in FIG.

  In the dehydration steady state where there is little lateral vibration, the buffer member 52 does not hit the trunk portion 50 of the fixed leg recess, and the buffer member 52 does not hit the support bar 55a. Therefore, the vibration of the main body can be reduced as shown in FIG. 3, and the vibration transmission to the floor can also be reduced.

(Embodiment 5)
FIG. 7 shows a cross-sectional view of a vibration isolating leg device for a washing machine according to a fifth embodiment of the present invention.

  In FIG. 7, the outer diameter Da of the receiving portion 51 of the upward recess formed in the fixed leg 48 is set to be equal to or larger than the outer diameter Db of the rubber leg 54. As a result, when the lateral vibration during heavy load during washing and dehydration activation is large, the area where the receiving portion 51 of the fixed leg recess holds the rubber leg is maximized, and the gripping force of the rubber leg is maximized. Can do. In the example, Da was set to 50 mm and Db was set to 45 mm.

(Embodiment 6)
FIG. 8 shows a cross-sectional view of a vibration isolator for a washing machine according to the sixth embodiment of the present invention.

  In FIG. 8, the seat 58 and the rubber leg 54 of the downward recess formed in the fixed leg 48 have a gap Sd. The clearance Sd is set to a dimension such that the seat 58 of the fixed leg recess presses the rubber leg when the lateral vibration during heavy load during washing and dehydration activation is large. In the present embodiment, the gap Sd is set to 1.0 to 1.5 mm. Thereby, when the lateral vibration at the time of heavy load at the time of washing and dehydration activation is large, the installation area of the rubber leg 54 is increased, and the gripping force of the rubber leg 54 can be increased. The main body can be prevented from moving.

  Further, since the gap Sa is provided between the rib tip of the body portion 50a formed on the fixed leg 48 and the support plate 56, and the gaps Sb and Sc are provided as in FIGS. When the front / rear / up / down / left / right vibrations are large, the gaps Sa, Sb, Sc, and Sd are eliminated, whereby the rigidity of the buffer member 52 is increased and the damping is also increased. Therefore, it is possible to suppress the vibration when the lateral vibration during the dehydration operation is large at the time of heavy load at the time of washing or dehydration start or at the time of light load.

  Further, at the time of light load during steady dehydration, the gaps Sa, Sb, Sc, and Sd are maintained, so that the rigidity of the buffer member 52 is low and the damping effect is low. The vibration transmission of can also be reduced.

(Embodiment 7)
FIG. 9 shows a cross-sectional view of a vibration isolating leg device for a washing machine according to the seventh embodiment of the present invention.

  In FIG. 9, the outer diameter Dc of the seat 58 of the downward recess formed in the fixed leg 48 is set to be equal to or larger than the outer diameter Dd of the rubber leg 54. As a result, when the lateral vibration during heavy load during washing and dehydration activation is large, the area where the seat 58 of the fixed leg recess holds the rubber leg is maximized, and the gripping force of the rubber leg is maximized. Can do. In the example, Dc was set to 50 mm and Dd was set to 45 mm.

  In all the above-described embodiments, it is more preferable that the hardness of the rubber leg 54 is higher than that of the buffer member 52. For example, the leg rubber 54 is made of chloroprene rubber and the hardness is set to 60 °, and the buffer member 52 is made of high-damping butyl rubber and the hardness is set to 45 °. As a result, as shown in FIG. 3, the vibration reduction effect is further increased in a low rotational speed region of 250 to 300 r / min in which the lateral vibration during heavy load at the time of washing and dehydration activation increases and in the main body resonance. it can.

  FIG. 10 is a cross-sectional view of the prevention leg device in FIG. 9, in which the shape of the body portion 50 and the buffer member 52 of the fixed leg is a donut shape, and there is a uniform gap between the shaft 55 a of the support member and the buffer member 52. And a gap with a uniform dimension is also provided between the buffer member 52 and the fixed leg body 50. Thereby, if it is a shake of a horizontal direction, a fixed leg and a buffer member will contact in any direction, and it can reduce a vibration. In addition, if the shape of the trunk | drum 50 of a fixed leg and the buffer member 52 is a donut shape and provided the clearance gap of the above equal dimension, even if it is square shape or a hexagon shape, the same effect will be acquired.

  As described above, the washing machine according to the present invention is a vibration isolator that reduces main body vibration, and can be applied to vibration isolation of rotating machines other than the washing machine.

Sectional drawing of the washing machine in Embodiment 1 of this invention Sectional view of the vibration isolator of the washing machine Vibration characteristics of the washing machine Sectional drawing of the vibration-proof leg apparatus of the washing machine in the 2nd Embodiment of this invention Sectional drawing of the vibration-proof leg apparatus of the washing machine in the 3rd Embodiment of this invention Sectional drawing of the vibration-proof leg apparatus of the washing machine in the 4th Embodiment of this invention Sectional drawing of the vibration-proof leg apparatus of the washing machine in the 5th Embodiment of this invention Sectional drawing of the vibration isolator of the washing machine in the 6th Embodiment of this invention Sectional drawing of the vibration isolator apparatus of the washing machine in the 7th Embodiment of this invention Cross section of the vibration isolator of the washing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 30 Washing machine outer frame 32 Elastic body 33 Outer tub 34 Washing and dewatering tub 35 Driving means 47 Anti-vibration leg device 48 Fixed leg 50 Body part 50a Body part 50b Body part 51 Receiving part 52 Buffer member 52a Buffer member 52b Buffer member 53 Through Hole 53a Through hole 53b Through hole 54 Rubber leg 55 Support member 55a Support rod (axis of support member)
55b Screw part 56 Support plate 57 Stopping member 58 Seat part

Claims (8)

A washing / dehydrating tub having a rotation shaft in a substantially horizontal direction, an outer tub enclosing the washing / dehydrating tub, driving means for rotating the washing / dehydrating tub during washing and dehydration, and the outer tub A washing machine outer frame that accommodates the swinging body in a swingable manner, and a fixed leg that is fixed to the bottom of the outer frame, a support member is provided inside the rubber leg at the bottom of the washing machine body, and the shaft of the support member A buffer member is interposed between the fixed leg and at least one of the rubber leg that fixes the support member or the support plate that fixes the shaft of the support member is not fixed to the fixed leg. Washing machine. The washing machine according to claim 1, wherein the shape of the fixed leg is configured by a substantially upward recess, and a buffer member is interposed between the fixed leg and the shaft of the support member. The washing machine according to claim 1, wherein the shape of the fixed leg is constituted by a substantially downward recess, and a buffer member is interposed between the fixed leg and the shaft of the support member. A gap is provided between the buffer member outer periphery and the fixed leg recess body or between the buffer member inner periphery and the shaft of the support member. 4. The size of the gap is set so that the outer periphery of the buffer member and the fixed leg recess body are in contact with each other when vibration is large, or the inner periphery of the buffer member and the shaft of the support member are in contact with each other. Washing machine. The washing machine according to claim 4, wherein when the shape of the fixed leg is constituted by a substantially upward recess, the outer diameter of the recess is set to be equal to or greater than the outer diameter of the rubber leg. When the shape of the fixed leg is constituted by a substantially downward recess, a seat is provided in the recess, the seat and the upper surface of the rubber leg are provided with a gap, and the seat and the rubber are subjected to heavy loads during washing and dehydration activation. The washing machine according to claim 4, wherein the dimension of the gap is set so that the upper surface of the leg contacts. The washing machine according to claim 6, wherein the outer diameter of the recess is set to be equal to or greater than the outer diameter of the rubber leg. The washing machine according to any one of claims 1 to 7, wherein the hardness of the rubber legs is higher than the hardness of the buffer member.