JP6034115B2 - Drum washing machine - Google Patents

Description

  The embodiment relates to a drum type washing machine.

  Some drum-type washing machines perform a dehydration operation in which moisture is discharged from clothes in the washing tub by centrifugal force by rotating the washing tub. This washing tub is rotated in a certain direction during the dehydration operation, and is stored in the water receiving tub. This water receiving tub is supported by the upper anti-vibration support device in the portion where the washing tub will rotate upward in the dehydration operation, and is supported by the lower anti-vibration support device in the portion where it will rotate downward. ing.

Japanese Patent Laid-Open No. 2008-295906

  In the case of a conventional drum-type washing machine, vibration and noise may occur due to the vibration of the water receiving tub transmitted to the casing through the lower vibration isolating support device during the dehydration operation.

The drum-type washing machine according to the embodiment includes a housing, a water receiving tub provided in the housing, with an axial center line arranged from front to back, and receiving water for washing clothes, and the water receiving It is provided in the tub, the axial center line is arranged from the front to the rear, the laundry tub into which clothes are put, the motor that rotates the laundry tub, and the motor that rotates in a certain direction Dehydrating means for performing dehydration operation for discharging moisture from clothes in the washing tub by centrifugal force, and supporting the water receiving tub in a portion provided in the housing and rotating upward in the dehydration operation An upper anti-vibration support device, and a lower anti-vibration support device that supports the water receiving tub in a portion that is provided in the housing and in which the washing tub rotates downward in the dehydration operation. The rigidity of the lower anti-vibration support device side is Characterized in place is set higher than the stiffness of the side of the upper vibration isolation support system.

The figure which shows Example 1 (sectional drawing which shows the internal structure of a drum type washing machine) Diagram showing suspension Diagram showing active suspension Sectional view showing the internal structure of the active suspension Diagram showing the arrangement of the suspension and active suspension with respect to the water receiving tank Diagram showing damping material The figure which shows Example 2 (a is a figure which shows a baseplate, b is sectional drawing which follows Xb line, c is sectional drawing which follows Xc line) The figure which shows Example 3 (The figure which shows the external appearance of an outer case in the decomposition | disassembly state of a left side board and a right side board) (A) is a figure which shows a right side board, (b) is sectional drawing which follows Xb line, (c) is a figure which expands and shows Xc part FIG. 9 equivalent view showing the left side plate The figure which shows Example 4 (FIG. 9 equivalent figure) Fig. 10 equivalent FIG. 9 shows a fifth embodiment (corresponding to FIG. 9). Fig. 10 equivalent The figure which shows Example 6 (a is a figure which shows the internal structure of the bottom part of an outer case, b is sectional drawing which follows Xb line, c is sectional drawing which follows Xc line) The figure which shows Example 7 (a is a figure which shows the internal structure of the bottom part of an outer case, b is sectional drawing which follows a Xb line) The figure which shows Example 8 (a is a figure which shows the internal structure of the bottom part of an outer case, b is sectional drawing which follows a Xb line)

  1 has a bottom plate 2, a top plate 3, a right side plate 4 (see FIG. 5), a left side plate 5 (see FIG. 5), a rear plate 6, a door mounting plate 7, a front lid 8, and a lower cover 9. The panel 10 is formed in a hollow box shape formed by joining each other. The outer box 1 is installed on the floor and corresponds to a housing. The bottom plate 2 has a horizontal dish shape whose upper surface is open. The bottom plate 2 is made of synthetic resin and has a quadrangular shape when viewed from the top and bottom. The top plate 3 is a horizontal plate that faces the bottom plate 2 from above, and is made of synthetic resin. Each of the right side plate 4 and the left side plate 5 is made of a metal such as a steel plate, and the main body viewed from the front side with the front side components such as the door mounting plate 7 removed from the drum type washing machine main body. As shown in FIG. 5, they are arranged to face each other in the left-right direction.

  Each of the rear plate 6 and the door mounting plate 7 is made of a metal such as a steel plate. As shown in FIG. 1, the rear plate 6 and the door mounting plate 7 are arranged opposite to each other in the front-rear direction, and the door mounting plate 7 is formed with an entrance / exit 11 formed of a circular through hole. Yes. The front lid 8 covers the door mounting plate 7 from the front. The front lid 8 is made of synthetic resin, and a circular through hole is formed in the front lid 8. The lower cover 9 is disposed below the front lid 8. This lower cover 9 is made of synthetic resin, and closes the gap between the bottom plate 2 and the front lid 8 from the front. The operation panel 10 is made of a synthetic resin and is disposed above the front lid 8. The operation panel 10 has a plurality of switches that can be operated by the user, and closes a gap between the top 3 and the front lid 8 from the front.

  As shown in FIG. 1, a circular door 12 is attached to the door mounting plate 7 of the outer box 1, and the door 12 is exposed forward through the through hole of the front lid 8. The door 12 can be operated from the front between the closed state and the open state, and the doorway 11 of the door mounting plate 7 is closed when the door 12 is closed and opened when the door 12 is open. .

As shown in FIG. 2, the bottom plate 2 of the outer box 1 is formed with a plurality of bosses 13 located at the left end. Each of the plurality of bosses 13 has a cylindrical shape that is directed in the vertical direction, and is disposed at the center in the front-rear direction of the outer box 1. A metal left mounting plate 14 is placed on the upper end surfaces of the plurality of bosses 13. The left mounting plate 14 is fixed to the bottom plate 2 through the plurality of bosses 13 by screwing screws into the respective bosses 13 from above through the left mounting plate 14. Part. The left mounting plate 14 corresponds to a mounting member, and a suspension 15 is fixed to the left mounting plate 14. The suspension 15 is disposed at the center of the outer case 1 in the front-rear direction and has a certain damping characteristic. The suspension 15 corresponds to an upper vibration-proof support device, and the detailed configuration of the suspension 15 is as follows.
= About suspension 15 =
The rod 16 in FIG. 2 has a cylindrical shape that is oriented in the vertical direction. The rod 16 penetrates the left mounting plate 14 in the vertical direction, and the rod 16 is formed with a large-diameter portion 17 positioned above the left mounting plate 14. The large-diameter portion 17 has a disk shape having a larger diameter than the rod 16. The outer peripheral surface of the rod 16 is positioned below the large-diameter portion 17 and has a seat plate 18 and a rubber seat plate 19. The rubber seat plate 20 and the seat plate 21 are inserted, and the left mounting plate 14 is interposed between the rubber seat plate 19 and the rubber seat plate 20. A nut 22 is screwed to the lower end portion of the rod 16, and the rod 16 has a seat plate 18, a rubber seat plate 19, a left mounting plate 14, a rubber seat plate 20 and a seat between the nut 22 and the large diameter portion 17. The plate 21 is fastened to the left mounting plate 14 by fastening.

  As shown in FIG. 2, a lower spring receiver 23 is inserted into the outer peripheral surface of the rod 16. The lower spring receiver 23 is supported by the large diameter portion 17 of the rod 16, and a damper spring 24 made of a compression coil spring is inserted on the outer peripheral surface of the rod 16 so as to be located above the lower spring receiver 23. . An upper spring receiver 25 is formed on the rod 16, and the damper spring 24 is interposed between the lower spring receiver 23 and the upper spring receiver 25. The upper spring receiver 25 has a container shape whose upper surface is open, and a cylindrical water receiving tank support 26 is formed in the upper spring receiver 25.

  A large-diameter portion 27 is formed at the upper end portion of the water tank support 26. The large diameter portion 27 has a disk shape having a larger diameter than the water receiving tank support 26, and is positioned on the outer peripheral surface of the water receiving tank support 26 above the large diameter portion 27 and the rubber plate 28 and rubber. A seat plate 29 is inserted. Each of the seat plate 28 and the rubber seat plate 29 is supported by the large-diameter portion 27, and the water receiving tank mounting plate 30 is inserted on the outer peripheral surface of the water receiving tank support 26 so as to be located above the rubber seat plate 29. The rubber seat plate 31 and the seat plate 32 are inserted on the upper side of the water receiving tank mounting plate 30. A nut 33 is screwed onto the upper end of the water receiving tank support 26, and the water receiving tank support 26 has a seat plate 28, a rubber seat plate 29, a water receiving tank mounting plate 30, and a rubber between the large diameter portion 27 and the nut 33. The seat plate 31 and the seat plate 32 are fastened to be fixed to the water receiving tank mounting plate 30. The suspension 15 is configured as described above.

As shown in FIG. 3, the bottom plate 2 of the outer box 1 is formed with a plurality of bosses 34 located at the right end. Each of the plurality of bosses 34 has a cylindrical shape that is directed in the vertical direction, and is disposed in the center of the outer case 1 in the front-rear direction. A metal right mounting plate 35 is placed on the upper end surfaces of the plurality of bosses 34. The right mounting plate 35 is fixed to the bottom plate 2 via the plurality of bosses 34 by screwing screws into the respective bosses 34 through the right mounting plate 35 from above. Part. The right mounting plate 35 corresponds to a mounting member, and an active suspension 36 is fixed to the right mounting plate 35. The active suspension 36 is disposed at the center portion in the front-rear direction of the outer box 1, and the damping characteristic can be adjusted electrically. The active suspension 36 corresponds to a lower vibration isolating support device, and the detailed configuration of the active suspension 36 is as follows.
= About the active suspension 36 =
The cylinder 37 in FIG. 3 is made of a magnetic material, and has a cylindrical shape whose lower surface is closed by a bottom plate 38. A rod 39 is formed on the bottom plate 38 of the cylinder 37. The rod 39 has a cylindrical shape directed in the vertical direction, and a nut 40 is screwed to the lower end portion of the rod 39. The rod 39 penetrates the right mounting plate 35 in the vertical direction, and a seat plate 41 and a rubber seat plate 42 are inserted on the outer peripheral surface of the rod 39 on the upper side of the right mounting plate 35. A rubber seat plate 43 and a seat plate 44 are inserted on the outer peripheral surface of the rod 39 below the right mounting plate 35, and the rod 39 is placed between the bottom plate 38 of the cylinder 37 and the nut 40. The rubber seat plate 42, the right mounting plate 35, the rubber seat plate 43, and the seat plate 44 are fastened to the right mounting plate 35.

  In the cylinder 37, as shown in FIG. 4, a lower yoke 45 and a holding member 46 are fixed. The lower yoke 45 is made of a cylindrical magnetic material whose upper and lower surfaces are open, and a bearing 47 made of oil-impregnated sintered metal is fixed to the lower yoke 45. The holding member 46 holds an upper yoke 48 made of a magnetic material, a bearing 49 made of oil-impregnated sintered metal, and an oil seal 50, and is arranged spaced apart upward from the lower yoke 45. A bobbin 51 is interposed between the lower yoke 45 and the upper yoke 48. The bobbin 51 has a coil 52 wound thereon, and power is supplied to the coil 52 through a wiring 53.

  As shown in FIG. 4, a cylindrical shaft 54 is inserted into the bearing 47 of the lower yoke 45 and the bearing 49 of the holding member 46. The shaft 54 is made of a magnetic material and is linearly movable in the vertical direction along each of the bearing 47 and the bearing 49. A spring receiver 55 is fixed to the shaft 54. The spring receiver 55 has a disk shape having a diameter larger than that of the shaft 54, and a damper spring 56 made of a compression coil spring is inserted into the outer peripheral surface of the shaft 54. The lower end of the damper spring 56 is fitted to the outer peripheral surface of the holding member 46, and the damper spring 56 is interposed between the spring receiver 55 of the shaft 54 and the holding member 46.

  A magnetorheological fluid 57 is filled between the shaft 54 and the lower yoke 47, between the shaft 54 and the coil 52, and between the shaft 54 and the upper yoke 48, as shown in FIG. This magnetorheological fluid 57 gives frictional resistance to the vertical movement of the shaft 54. When the coil 52 is electrically turned on, the shaft 54, the magnetorheological fluid 57, the lower yoke 45, A magnetic circuit is formed between the cylinder 37, the holding member 46, and the upper yoke 48, so that a portion of the magnetorheological fluid 57 through which magnetic flux passes (particularly between the shaft 54 and the lower yoke 45 and between the shaft 54 and the upper yoke 48). The viscosity of the magnetorheological fluid 57 increases. That is, the active suspension 36 has the same damping characteristics as the suspension 15 in the electrically off state of the coil 52, and the damping characteristics in the on state of the coil 52 are lower than those in the off state of the coil 52 and the suspension 15. Rise.

  A large-diameter portion 58 is fixed to the upper end portion of the shaft 54 as shown in FIG. The large-diameter portion 58 has a disk shape with a larger diameter than the shaft 54, and a seat plate 59 and a rubber seat plate 60 are positioned on the outer peripheral surface of the shaft 54 above the large-diameter portion 58. Has been inserted. Each of the seat plate 59 and the rubber seat plate 60 is supported by the large-diameter portion 58, and the water receiving tank mounting plate 61 is inserted on the outer peripheral surface of the shaft 54 so as to be located above the rubber seat plate 60. A rubber seat plate 62 and a seat plate 63 are inserted above the water receiving tank mounting plate 61. A nut 64 is screwed to the upper end portion of the shaft 54, and the shaft 54 includes a seat plate 59, a rubber seat plate 60, a water tank mounting plate 61, and a rubber seat plate 62 between the nut 64 and the large diameter portion 58. The seat plate 63 is fastened to the water receiving tank mounting plate 61 by fastening. The active suspension 36 is configured as described above.

  As shown in FIG. 5, a water receiving tank 65 is accommodated in the outer box 1. The water receiving tank 65 has a cylindrical shape with an open front surface, and has a circular rear plate and a cylindrical peripheral plate surrounding the rear plate. A water receiving tank mounting plate 30 of the suspension 15 and a water receiving tank mounting plate 61 of the active suspension 36 are joined to the water receiving tank 65 with screws. The suspension 15 supports the water receiving tank 65 from below on the left side with respect to the axial center line CL (see FIG. 1) of the water receiving tank 65 when viewed from the front, and the active suspension 36 is the axial center line CL of the water receiving tank 65. On the right side, the water receiving tank 65 is supported from below, and the water receiving tank 65 is supported by the bottom plate 2 of the outer box 1 via the suspension 15 and the active suspension 36. The water receiving tank 65 receives water for washing clothes, and is arranged in an inclined state in which the axial center line CL descends from front to back as shown in FIG.

  A drum motor 66 is fixed to the rear plate of the water receiving tank 65 as shown in FIG. The drum motor 66 is housed in the outer box 1 so as to be located outside the water receiving tank 65, and has a rotating shaft protruding into the water receiving tank 65. A drum 67 is fixed to the rotating shaft of the drum motor 66 in the water receiving tank 65. The drum 67 has a cylindrical shape with an open front surface, and has a circular rear plate and a cylindrical peripheral plate surrounding the rear plate. The drum 67 is used to put clothes, and is arranged in an inclined state in which the drum 67 moves downward from the front to the rear so that the axis of the drum 67 overlaps the axis of the water receiving tank 65. The drum 67 serves as both a washing tub and a dewatering tub. Clothes in the drum 67 are washed and dehydrated in response to the drum 67 being rotated by the drum motor 66. The drum 67 corresponds to a washing tub, and the drum motor 66 corresponds to a motor.

  A water supply valve is accommodated in the outer box 1. This water supply valve has an inlet and an outlet and is switched between a closed state and an open state in response to being electrically operated. The inlet of the water supply valve is connected to a water tap, and the outlet of the water supply valve is connected to the water receiving tank 65 via a hose. When the water supply valve is open, tap water is supplied from the water tap to the water receiving tank 65. Injected.

  A drain pipe is accommodated in the outer box 1. The drain pipe has an upper end connected to the water receiving tank 65, and a drain valve is interposed in the drain pipe. This drain valve is switched between a closed state and an open state in response to an electrical operation, and in the closed state of the drain valve, tap water injected into the water receiving tank 65 from the outlet of the water supply valve is The water is stored in the water receiving tank 65, and the tap water in the water receiving tank 65 is discharged out of the water receiving tank 65 through the drain pipe when the drain valve is opened.

  A duct is fixed in the outer box 1. The duct is disposed below the water receiving tank 65, and each of the inlet and the outlet of the duct is connected to the water receiving tank 65. A heat pump condenser and an evaporator are accommodated in the duct. Each of these condensers and evaporators is connected between the discharge port and the suction port of the compressor. In the operation state of the compressor, the refrigerant discharged from the discharge port of the compressor passes through each of the condenser and the evaporator and sucks the compressor. It is sucked into the mouth. This compressor is fixed to the bottom plate 2 of the outer box 1 and is stored in the outer box 1 so as to be positioned below the water receiving tank 65.

  A fan casing is fixed in the outer box 1. This fan casing contains a fan, and the fan is connected to a rotating shaft of a fan motor. This fan motor is fixed to the fan casing. When the fan motor is operating, the air in the water receiving tank 65 enters the duct from the duct entrance as the fan rotates. The air that has entered the duct is brought into contact with the evaporator and the condenser in turn, and becomes hot air with low humidity. The low-humidity warm air is returned to the water receiving tank 65 from the outlet of the duct as dry air for drying the clothes in the drum 67.

  A control circuit is fixed in the outer box 1. This control circuit detects the electrical state of each of the plurality of switches of the operation panel 10, and sets an operation course according to the detection result of each of the plurality of switches. This control circuit is composed mainly of a microcomputer and detects an acceleration signal from an acceleration sensor. This acceleration sensor is fixed to the water receiving tank 65, and outputs an acceleration signal corresponding to the magnitude of the acceleration of the water receiving tank 65 when the drum 67 is rotated by the drum motor 66.

  The control circuit drives and controls the active suspension 36, the drum motor 66, the water supply valve, the drain valve, the compressor, and the fan motor according to the setting result of the operation course, so that each of the washing process, the rinsing process, the dehydrating process, and the drying process is performed. Is to do. In each of the washing process and the rinsing process, the drum motor 66 is rotated at a low speed while the tap water is stored in the water receiving tank 65, and the control circuit controls the coil of the active suspension 36 in each of the washing process and the rinsing process. The damping characteristic of the active suspension 36 is set to be the same as that of the suspension 15 by setting 52 to the off state.

  In the dehydration process, moisture is discharged from the clothes in the drum 67 by centrifugal force by rotating the drum motor 66 at a high speed, and has an acceleration period, a steady period, and a deceleration period. The acceleration period is a period in which the drum motor 66 is accelerated from the rotation stop state to a steady speed (1300 to 1800 rpm), the steady period is a period in which the drum motor 66 is operated at a constant speed, and the deceleration period is a period in which the drum motor 66 is operated. This is a period in which the rotation is stopped by decelerating from the steady speed, and the drum motor 66 is rotated in a certain direction in the clockwise direction indicated by the arrow in FIG. 5 in each of the acceleration period, the steady period, and the deceleration period. The active suspension 36 supports a downward force acting from the drum 67 through the water receiving tank 65 during the dehydration process. As shown in FIG. 5, the drum 67 rotates when the drum motor 66 is rotated in a certain direction. The water receiving tank 65 is supported on the lower side in the direction. The suspension 15 supports an upward force acting from the drum 67 through the water receiving tank 65 during the dehydration process, and the water on the upper side in the rotation direction of the drum 67 when the drum motor 66 is rotated in a certain direction by the dehydration process. The receiving tank 65 is supported.

  During the acceleration period of the dehydration process, the drum motor 66 is operated at a constant speed at the unbalancing determination speed each time the rotation speed of the drum motor 66 reaches each of the plurality of unbalancing determination speeds. Each of the plurality of unbalancing determination speeds is set to a plurality of mutually different speeds that are slower than the steady speed, and the control circuit performs unbalancing determination processing each time the drum motor 66 is operated at a constant speed at the unbalancing determination speed. I do. This unbalancing determination process detects an acceleration signal from the acceleration sensor, calculates the shaking amount of the water receiving tank 65 according to the detection result of the acceleration signal, and compares the calculation result of the shaking amount with the unbalancing determination value. When the circuit determines that the calculation result of the shaking amount is smaller than the unbalancing determination value, the rotational speed of the drum motor 66 is accelerated from the current unbalancing determination speed, and the calculating result of the shaking amount is equal to or more than the unbalancing determination value. If it is determined, retry processing is executed. In this retry process, the dewatering process is started from the beginning of the acceleration period after a loosening operation that improves the bias of clothing in the drum 67 by alternately rotating the drum motor 66 in the forward and reverse directions. The drum motor 66 reaches the steady speed when it is determined that the calculation result of the swing amount at each of the plurality of uncrowded determination speeds is smaller than the unbalancing determination value.

  The control circuit turns on the coil 52 of the active suspension 36 during the dehydration acceleration period to enhance the damping characteristics of the active suspension 36 as compared with the coil 52 off state, and during the steady period and deceleration period of the dehydration process. The damping characteristics of the active suspension 36 are set to be the same as the damping characteristics of the suspension 15 by turning off the coil 52 of the active suspension 36, and the damping of the active suspension 36 is set within the acceleration period of the dehydration process. By improving the characteristics, the amount of shaking of the water receiving tank 65 is kept low, and the frequency at which the detection result of the amount of shaking is judged to be equal to or greater than the uncrowded determination value is reduced. Accordingly, since the frequency with which the retry process is performed is reduced, the drum motor 65 is smoothly accelerated from the rotation stopped state to the steady speed. This is referred to as cross-over performance.

  As shown in FIG. 6, a damping material 68 is attached to the right side plate 4 of the outer box 1 so as to be positioned on the left side surface. The damping material 68 has rubber elasticity and is housed in the outer box 1. This damping material 68 is to increase the rigidity of the right side plate 4 of the outer box 1 compared to the left side plate 5, and the rigidity of the outer box 1 is set to be higher at the right side than at the left side. The damping material 68 has a rectangular shape having two long sides and two short sides, and each of the two long sides is substantially parallel to the respective axial center lines CL of the water receiving tank 65 and the drum 67. Are arranged horizontally.

According to the said Example 1, there exists the following effect.
The drum 67 is rotated at a steady speed after being accelerated from the rotation stop state to the steady speed by the dehydration operation, and the water receiving tank is used during the acceleration period until the drum 67 is accelerated from the rotation stop state to the steady speed. 65 is detected, and it is determined whether or not an imbalance has occurred in the drum 65 according to the detection result of the swing amount. If it is determined that an imbalance has occurred, the loosening operation is performed. By doing so, after the clothing imbalance in the drum 67 is improved, the drum 67 is accelerated again from the rotation stop state toward the steady speed. During the acceleration period of this dewatering operation, the damping characteristic of the active suspension 36 is set higher than that of the suspension 15, and the amount of shaking of the water receiving tank 65 is kept low by the damping characteristic of the active suspension 36, thereby causing an imbalance. The frequency at which it is determined to be present is lowered. Therefore, during the acceleration period of the dehydration operation, the shaking of the water receiving tank 65 is easily transmitted from the active suspension 36 to the right side plate 4 through the bottom plate 2 of the outer box 1. In recent years, shortening of the operation time has been required due to an increase in energy saving, and the steady speed of the drum 67 in the dehydration operation has been increased from about 1200 rpm to about 1300 to 1800 rpm. For this reason, the shaking of the water receiving tank 65 was more easily transmitted from the active suspension 36 to the right side plate 4 through the bottom plate 2 of the outer box 1 within the acceleration period of the dehydration operation. However, since the rigidity of the right side on the active suspension 36 side of the outer box 1 is set higher than the rigidity of the left side on the suspension 15 side, the right side of the outer box 1 passes through the active suspension 36 from the water receiving tank 65. The vibration transmitted to the floor is reduced and the vibration transmitted to the floor through the right side of the outer box 1 is also reduced. Therefore, since it is suppressed that a vibration and driving | running | working sound generate | occur | produce in each of the right side part and floor surface of the outer case 1, silence can be maintained.

  The active suspension 36 is used as a lower anti-vibration support device that supports the water receiving tank 65 in a portion where the rotation direction of the drum 67 is downward, and the damping characteristic of the active suspension 36 is set high during the dehydration operation acceleration period and the dehydration operation is performed. The damping characteristics of the active suspension 36 were returned to normal during each of the steady period and the deceleration period. Accordingly, since a high damping force is not transmitted from the active suspension 36 to the right side portion of the outer case 1 during the steady period of the dehydration operation, the right side portion of the outer case 1 vibrates greatly, and thus operation noise may be generated. Is prevented.

  By sticking the damping material 68 to the right side plate 4 of the outer box 1, the rigidity of the right side of the outer box 1 is set higher than that of the left side in the direction parallel to the axis CL of the drum 67. Accordingly, since vibrations transmitted from the water receiving tank 65 through the active suspension 36 and the bottom plate 2 of the outer box 1 to the right side plate 4 in order during the dehydration acceleration period can be suppressed, quietness can be maintained. Moreover, the damping material 68 is set in a rectangular shape with the long side being horizontal and the short side being vertical. For this reason, since the rigidity of the right side plate 4 in particular in the front-rear direction is enhanced, the vibration damping performance of the right side plate 4 is further enhanced.

  As shown in FIG. 7, an upper frame rib 71 is formed on the bottom plate 2 of the outer box 1 on the left side. The upper frame rib 71 is disposed below the left mounting plate 14 that supports the suspension 15, and has a frame shape protruding upward from the upper surface of the bottom plate 2. The upper frame rib 71 has a plurality of ribs 13 disposed therein, and a plurality of upper ribs 72 are formed on the bottom plate 2 so as to be positioned in the upper frame rib 71. Each of the plurality of upper ribs 72 has a linear shape protruding upward from the bottom plate 2, and each of the plurality of bosses 13 is connected to each other via the upper rib 72.

  As shown in FIG. 7, a lower frame rib 73 is formed on the bottom plate 2 of the outer box 1 so as to be positioned below the upper frame rib 71. The lower frame rib 73 overlaps with the upper frame rib 71 when viewed in the vertical direction and has a frame shape protruding downward from the bottom plate 2. A plurality of lower ribs 74 are formed on the bottom plate 2. Each of the plurality of lower ribs 74 is disposed in the lower frame rib 73 and has a linear shape protruding downward from the bottom plate 2.

  As shown in FIG. 7, an upper frame rib 75 is formed on the bottom plate 2 of the outer box 1 on the right side. The upper frame rib 75 is disposed below the right mounting plate 35 that supports the active suspension 36, and has the same shape as the upper frame rib 71. The upper frame rib 75 has a plurality of ribs 34 disposed therein, and a plurality of upper ribs 76 are formed on the bottom plate 2 so as to be positioned in the upper frame rib 75. Each of the plurality of upper ribs 76 has a linear shape protruding upward from the upper surface of the bottom plate 2, and each of the plurality of bosses 34 is connected to each other via the upper rib 76. The total number of the upper ribs 76 is set to be larger than that of the upper rib 72, and the rigidity of the bottom plate 2 is set higher in the upper frame rib 75 than in the upper frame rib 71.

  As shown in FIG. 7, a lower frame rib 77 is formed on the bottom plate 2 of the outer box 1 so as to be positioned below the upper frame rib 75. The lower frame rib 77 overlaps with the upper frame rib 75 when viewed in the vertical direction, and has a frame shape protruding downward from the bottom plate 2. A plurality of lower ribs 78 are formed in the bottom plate 2 so as to be located in the lower frame ribs 77. Each of the plurality of lower ribs 78 has a linear shape protruding downward from the bottom plate 2, and the total number and layout of the lower ribs 78 are set to be the same as the lower ribs 74 in the lower frame rib 73. .

  As shown in FIG. 7, the thickness dimension of the bottom plate 2 in the vertical direction is set to Tr in the upper frame rib 71 below the suspension 15, and the inside of the upper frame rib 75 below the active suspension 36 is set to Tr. The rigidity of the bottom plate 2 is set higher in the upper frame rib 75 than in the upper frame rib 71 depending on the thickness dimension of the bottom plate 2. That is, the bottom plate 2 of the outer box 1 is set to have higher rigidity on the right side on the active suspension 36 side than on the left side on the suspension 15 side.

According to the said Example 2, there exist the following effects.
Of the bottom plate 2, the thickness dimension Tl in the upper frame rib 75 is set to be thicker than the thickness dimension Tr in the upper frame rib 71, and the total number of upper ribs 76 in the upper frame rib 75 is set in the upper frame rib 71. The number of the upper ribs 72 is set to be larger than the total number of the upper ribs 72, and the rigidity of the right side of the bottom plate 2 of the outer box 1 is set higher than that of the left side without changing the external shape of the outer box 1. Accordingly, vibration transmitted from the active suspension 36 to the bottom plate 2 of the outer box 1 during the dehydrating operation is reduced, so that the quietness can be maintained without impairing the symmetry of the outer shape of the outer box 1. it can.

  In the second embodiment, the rigidity of the right side portion of the bottom plate 2 is increased by setting the thickness dimension of the upper rib 76 in the upper frame rib 75 to be larger than the thickness dimension of the upper rib 72 in the upper frame rib 71. You may set high compared with the left side part.

  As shown in FIG. 8, each of the right side plate 4 and the left side plate 5 of the outer box 1 has a trapezoidal shape when viewed from the left and right directions, and the rigidity of the right side plate 4 is the thickness dimension T1 ( 9) is set higher than the left side plate 5 by setting it thicker than the thickness dimension T2 of the left side plate 5 (see FIG. 10).

As shown in FIG. 9, the right side plate 4 is formed with a plurality of beads 81 arranged in parallel in the vertical direction. Each of the plurality of beads 81 is directed in the front-rear direction and protrudes toward the inside of the outer box 1. As shown in FIG. 10, the left side plate 5 is formed with a plurality of beads 82 arranged in parallel in the vertical direction. Each of the plurality of beads 82 is directed in the front-rear direction and protrudes toward the inside of the outer box 1. Each of the plurality of beads 82 has a shape including a depth dimension set to be the same as that of the bead 81, and is arranged in the same layout as the bead 81.

According to the said Example 3, there exist the following effects.
By setting the thickness dimension T1 of the right side plate 4 of the outer box 1 to be thicker than the thickness dimension T2 of the left side plate 5, the rigidity of the right side part of the outer box 1 was increased compared to the left side part. For this reason, the vibration transmitted from the active suspension 36 to the right side plate 4 through the bottom plate 2 of the outer box 1 during the steady period of the dehydration operation is reduced, so that it is quiet without impairing the symmetry of the outer shape of the outer box 1. Can be maintained.

  As shown in FIGS. 11 and 12, the right side plate 4 and the left side plate 5 of the outer box 1 are set to have the same thickness dimension, and each of the plurality of beads 81 of the right side plate 4 has a depth. The dimension D1 is set deeper than the depth dimension D2 of the bead 82 of the left side plate 5. That is, the right side plate 4 is set to have higher rigidity than the left side plate 5 by setting the depth dimension D1 of the bead 81 deeper than the bead 82 of the left side plate 5.

According to the said Example 4, there exists the following effect.
By setting the depth dimension D1 of the bead 81 of the right side plate 4 of the outer box 1 deeper than the depth dimension D2 of the bead 82 of the left side plate 5, the rigidity of the right side part of the outer box 1 is increased compared to the left side part. It was. Accordingly, the vibration transmitted from the active suspension 36 to the right side plate 4 through the bottom plate 2 of the outer box 1 during the steady period of the dehydration operation is reduced, so that the silence can be maintained.

  As shown in FIGS. 13 and 14, the right side plate 4 and the left side plate 5 of the outer box 1 are set to have the same thickness, but the bead 81 of the right side plate 4 The total number is set to be larger than the total number of beads 82 of the left side plate 5. That is, the right side plate 4 is set to have higher rigidity than the left side plate 5 by setting the total number of beads 81 to be larger than that of the bead 82 of the left side plate 5.

According to the said Example 5, there exist the following effects.
By setting the total number of beads 81 of the right side plate 4 of the outer box 1 to be larger than that of the beads 82 of the left side plate 5, the rigidity of the right side portion of the outer box 1 is increased compared to the left side portion. Accordingly, the vibration transmitted from the active suspension 36 to the right side plate 4 through the bottom plate 2 of the outer box 1 during the steady period of the dehydration operation is reduced, so that the silence can be maintained.

In the fifth embodiment, the depth dimension of the bead 81 of the right side plate 4 may be set deeper than the bead 82 of the left side plate 5.
In each of Examples 4 and 5, the thickness dimension of the right side plate 4 may be set to be thicker than the thickness dimension of the left side plate 5.

  The left mounting plate 14 in FIG. 15 supports the suspension 15 on the bottom plate 2 of the outer box 1, and the right mounting plate 35 supports the active suspension 36 on the bottom plate 2 of the outer box 1. The thickness T3 of the right mounting plate 35 is set to be thicker than the thickness T4 of the left mounting plate 14, and the rigidity of the right mounting plate 35 is set to be higher than that of the left mounting plate 14. Has been. That is, the rigidity of the bottom plate 2 of the outer box 1 is set higher on the right side than on the left side.

According to the said Example 6, there exist the following effects.
By setting the thickness T3 of the right mounting plate 35 for the active suspension 36 to be larger than the thickness T4 of the left mounting plate 14 for the suspension 15, the rigidity of the right side of the bottom plate 2 is increased compared to the left side. It was. Therefore, since vibration transmitted from the active suspension 36 to the right mounting plate 35 during the steady period of the dehydration operation is reduced, it is possible to maintain quietness without impairing the symmetry of the outer shape of the outer box 1.

  As shown in FIG. 16, a reinforcing member 91 is accommodated in the outer box 1. The reinforcing member 91 is made of a metal such as a steel plate and has a vertical portion 92 and a horizontal portion 93. The reinforcing member 91 is fixed to the bottom plate 2 by screwing a plurality of screws to the bottom plate 2 through the horizontal portion 93 from above, and the vertical portion 92 of the reinforcing member 91 is connected to the right side plate 4 in the outer box 1. In contact.

  As shown in FIG. 16, the right side plate 4 of the outer box 1 is formed with a first bent portion 94 located at the lower end portion. The first bent portion 94 is a horizontal portion directed from the lower end of the right side plate 4 toward the inside of the outer box 1, and the second bent portion 95 is formed in the first bent portion 94. Yes. The second bent portion 95 is a vertical portion directed downward from the front end of the first bent portion 94, and the first bent portion 94 is formed between the horizontal portion 93 of the reinforcing member 91 and the bottom plate 2. It is sandwiched between. The reinforcing member 91 reinforces the right side portion of the outer box 1, and the rigidity of the right side portion of the outer box 1 is set higher than the left side portion by being reinforced by the reinforcing member 91.

According to the said Example 7, there exist the following effects.
A reinforcing member 91 that clamps the right side plate 4 of the outer box 1 between the bottom plate 2 and the bottom plate 2 is provided, and the rigidity of the connection portion between the bottom plate 2 and the right side plate 4 is changed to the rigidity of the connection portion between the bottom plate 2 and the left side plate 5. The rigidity of the right side portion of the outer box 1 was set higher than that of the left side portion by increasing the comparison. Therefore, since vibration transmitted from the active suspension 36 to the right side plate 4 through the bottom plate 2 during the steady period of the dehydration operation is reduced, it is possible to maintain quietness.

  As shown in FIG. 17, a reinforcing plate 101 is joined to the bottom plate 2 of the outer box 1 so as to be positioned on the outer peripheral surface of the upper frame rib 75 on the active suspension 36 side. The reinforcing plate 101 is made of a metal plate such as a galvanized steel plate, and the upper frame rib 75 is reinforced to increase the rigidity of the right side portion of the bottom plate 2 of the outer box 1 compared to the left side portion. The reinforcing plate 101 corresponds to a reinforcing member.

According to the said Example 8, there exist the following effects.
The reinforcing plate 101 is provided on the upper frame rib 75 on the active suspension 36 side, and the rigidity of the periphery of the right mounting plate 35 in the bottom plate 2 of the outer box 1 is increased so that the rigidity of the right side of the outer box 1 is higher than that of the left side. Increased. Therefore, since vibration transmitted from the active suspension 36 to the bottom plate 2 during the steady period of the dehydration operation is reduced, it is possible to maintain quietness.

  In each of the first to eighth embodiments, a twin action oil damper may be used instead of the active suspension 36. This twin-action oil damper increases the damping force during the acceleration period of the dehydration operation in which the suspension strokes large, and the damping force decreases during the steady period and the deceleration period during which the suspension is stroked small.

  In each of the first to eighth embodiments, the drum 67 may be rotated in the direction opposite to the arrow direction in FIG. In this case, if the right side of the axial center line CL of the water receiving tank 65 is supported by the suspension 15 and the left side is supported by the active suspension 36, the rigidity of the left side of the outer box 1 is set higher than that of the right side. good.

  In each of the first to eighth embodiments, the suspension 15 may be used in place of the active suspension 36 on the right side in the outer box 1. In this case, during the acceleration period of the dehydration operation, a small amount of vibration is transmitted from the water receiving tank 65 to the right side portion of the outer case 1 through the right side suspension 15 as compared to when the active suspension 36 is used. However, since the rigidity of the right side portion of the outer box 1 is set higher than the rigidity of the left side portion, vibration transmitted from the water receiving tank 65 through the suspension 15 on the right side portion to the right side portion of the outer case 1 is reduced and the outer side is reduced. Vibration transmitted to the floor through the right side of the box 1 is also reduced. Therefore, since it is suppressed that a vibration and driving | running | working sound generate | occur | produce in each of the right side part and floor surface of the outer case 1, silence can be maintained.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other examples, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

  1 is an outer box (housing), 14 is a left mounting plate (mounting member), 15 is a suspension (upper vibration isolation support device), 35 is a right mounting plate (mounting member), and 36 is an active suspension (lower vibration isolation support). (Device), 65 is a water receiving tub, 66 is a drum motor (motor), 67 is a drum (washing tub), 81 is a bead, 82 is a bead, 91 is a reinforcing member, and 101 is a reinforcing plate (reinforcing member).

Claims (11)

A housing,
A water receiving tub provided in the housing, the axial center line is arranged from front to back, and receives water for washing clothes;
A washing tub provided in the water receiving tub , the axial center line is arranged from the front to the rear, and into which clothes are put,
A motor for rotating the washing tub;
A dehydrating means for performing a dehydrating operation of discharging moisture from the clothes in the washing tub by centrifugal force by rotating the motor in a certain direction;
An upper anti-vibration support device that is provided in the housing and supports the water receiving tank in a portion where the washing tub rotates upward in the dehydration operation;
A lower vibration isolating support device that is provided in the housing and supports the water receiving tub in a portion where the washing tub rotates downward in the dehydration operation;
The drum-type washing machine according to claim 1, wherein the casing has a rigidity set on the lower vibration-proof support device side higher than that on the upper vibration-proof support device side.   The drum type washing machine according to claim 1, wherein the lower vibration isolating support device has higher damping characteristics than the upper vibration isolating support device.   The drum type washing machine according to claim 2, wherein the lower vibration isolating support device is composed of an active suspension whose damping characteristic is electrically adjustable. The housing is
In the direction substantially parallel to the axis of the washing tub, the rigidity of the lower anti-vibration support device is set higher than the rigidity of the upper anti-vibration support device. The drum type washing machine according to any one of claims 1 to 3. The housing is
5. The rigidity of the lower vibration-proof support device side of the bottom plate of the housing is set higher than the rigidity of the upper vibration-proof support device side. A drum-type washing machine as described in 1. The housing is
Of the left side plate and the right side plate of the housing, the depth dimension of one bead on the lower vibration isolating support device side is set deeper than the depth dimension of the other bead. The drum type washing machine according to any one of claims 1 to 5. The housing is
The total number of one bead on the side of the lower vibration isolating support device among the left side plate and the right side plate of the casing is set to be larger than the total number of the other bead. The drum type washing machine according to any one of Items 6 to 6. The housing is
The thickness dimension of one of the left side plate and the right side plate of the casing on the side of the lower vibration isolating support device is set to be thicker than the other thickness dimension. The drum-type washing machine according to any one of 7. The housing is
The lower vibration-proof support device has an attachment member for fixing the upper vibration-proof support device to the bottom plate of the housing and the attachment member for fixing the lower vibration-proof support device to the bottom plate of the housing, 9. The thickness dimension of the attachment member for the anti-vibration support device is set to be thicker than the thickness dimension of the attachment member for the upper anti-vibration support device. Drum-type washing machine.   10. A reinforcing member that sandwiches one of the left side plate and the right side plate of the housing, which is on the side of the lower vibration isolating support device, with the bottom plate of the housing. The drum-type washing machine according to any one of the above.   The drum-type washing machine according to any one of claims 1 to 10, wherein a reinforcing member is provided on the bottom plate of the housing on the lower vibration-proof support device side.

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