JP2015043795A - Drum-type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum-type washing machine which is reduced in vibration and noise.SOLUTION: Vibration-proof dampers in a drum-type washing machine include: a first vibration-proof damper 25 provided on the side of a direction in which a rotary drum 17 is rotated during a dewatering step, and arranged at a position closer to a front face side than the position of the center of gravity G of a water tub unit 37; a second vibration-proof damper 26 arranged at a position closer to a back face side than the position of the center of gravity G of the water tub unit 37; and a third vibration-proof damper 27 arranged on the side of a direction opposite to the direction in which the rotary drum 17 is rotated. Housing connection parts 34 connected with the first vibration-proof damper 25 and the second vibration-proof damper 26 are each attached to a washing machine housing 23 via third cushioning members 38 and 39. Thus, the vibration of the water tub unit 37 caused by the uneven distribution of clothes is damped in the front-and-back direction and in the right-and-left direction by the first vibration-proof damper 25, the second vibration-proof damper 26 and the vibration-proof components in the attachment parts of the washing machine housing 23, so that reduced vibration and reduced noise can be achieved.

Description

  The present invention relates to a drum-type washing machine that performs washing, rinsing, and dewatering processes by rotating a rotating drum housed in a water tank.

  Conventionally, in order to control vibration, this type of drum type washing machine is provided with a vibration-damping damper at the bottom of the water tank, and the vibration of the water tank unit is suppressed by the damping thereof (see, for example, Patent Document 1).

  FIG. 5 shows a configuration diagram of a conventional washing machine.

  In FIG. 5, the rotating drum 1 for storing and rotating the laundry is rotatably disposed in the water tank 3, and a drum driving motor 5 for rotating the rotating drum 1 is provided at the bottom of the water tank 3. ing. A lid 8 is provided at the opening of the rotating drum 1 so as to be freely opened and closed. The water tank 3 is held in a posture by a spring body 10 provided between the washing machine housing 9 and the vibration is prevented from being transmitted to the washing machine housing 9 by the support damper 11 and the vibration damping damper 12. It is supported. Further, a seal packing 7 for connecting a gap is provided between the clothing inlet on the front surface of the water tank 3 and the washing machine housing 9.

  The water tank 3 is provided with a vibration detection device 6 using an acceleration sensor, and the control means 13 controls the operation of the drum drive motor 5 according to the output of the vibration detection device 6 to generate vibration. It is the structure of controlling.

JP 2012-170678 A

  However, in the conventional configuration, the direction in which the damping force of the damper works is limited, and an uneven load due to clothing or the like occurs during the dehydration process, so that the vibration of the water tank unit increases, and the front and rear parts of the water tank unit However, it was impossible to stop vibrations that needed to be attenuated in multiple directions, such as swinging movements that moved in the opposite directions.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a drum-type washing machine that can be damped in multiple directions by attaching a vibration-proof component to a mounting portion of a damper and has low vibration and low noise. It is said.

In order to solve the above-mentioned conventional problems, a drum type washing machine of the present invention includes a washing machine casing, a water tank formed in a bottomed cylindrical shape, and a bottomed cylinder opened in the front side and disposed in the water tank. A rotary shaft having a shape, a rotary shaft fixed to the center of the bottom surface of the rotary drum and supported by a bearing fixed to the bottom surface of the water tank, and the rotary drum fixed to the lower part of the water tank via the rotary shaft. A drum drive motor that rotates, a water tank unit that includes the water tank, the rotary drum, a bearing, a rotating shaft, a drum drive motor, and the like, a lower end connected to the upper part of the water tank, and an upper end at the upper part of the washing machine casing A plurality of suspensions connected to elastically support the water tank unit in the washing machine casing, and a water tank connecting part provided at a lower end of the water tank via a first cushioning material, and a lower end of the washing machine. Enclosure A plurality of anti-vibration dampers that are arranged in an oblique direction to suppress vibration of the water tank unit by being connected to the housing connecting part via a second buffer material at a lower part, and the water tank unit is the rotating The drum rotation shaft is disposed in the washing machine casing such that the axis of the rotating shaft is inclined downward or substantially horizontal from the front side to the back side, and the plurality of vibration damping dampers are at least during the dehydration process. A first anti-vibration damper disposed on the front side of the center of gravity of the water tank unit, and a direction in which the rotating drum rotates during the dehydration process. A second anti-vibration damper provided on the side and disposed closer to the back side than the center of gravity of the water tank unit, and disposed on the opposite side of the rotating drum during the dehydration process. A third vibration isolating damper, and the casing connecting portion to which the first anti-vibration damper and the second anti-vibration damper are coupled is connected to the washing machine casing via a third cushioning material. It is designed to be attached.

  As a result, the vibrations of the aquarium unit caused by the garment offset are damped in the front-rear and left-right directions by the first anti-vibration damper and the anti-vibration parts on the attachment part of the second anti-vibration damper and the washing machine housing. By doing so, low vibration and low noise can be realized.

  The drum-type washing machine according to the present invention is configured to reduce vibrations of the water tank unit generated by the displacement of clothing by the first vibration damping damper, the second vibration damping damper, and the vibration damping parts at the attachment portion of the washing machine casing.・ Low vibration and noise can be achieved by damping in the left and right direction.

The longitudinal cross-sectional view of the drum type washing machine which concerns on embodiment of this invention Inside front view of the drum type washing machine Inside top view of the drum type washing machine Longitudinal sectional view of the first vibration damping damper and the second vibration damping damper of the drum type washing machine and the housing connecting portion Configuration diagram of a conventional drum-type washing machine

A first invention includes a washing machine casing, a water tank formed in a bottomed cylindrical shape, a bottomed cylindrical rotary drum opened in a front side and disposed in the water tank, and a bottom center of the rotary drum A rotating shaft supported by a bearing fixed to the bottom surface of the water tank, a drum driving motor fixed to a lower part of the water tank and rotating the rotating drum via the rotating shaft, and the water tank, rotating A water tank unit composed of a drum, a bearing, a rotating shaft, a drum drive motor, and the like, and a lower end connected to an upper part of the water tank and an upper end connected to an upper part of the washing machine casing, and the water tank unit is placed in the washing machine casing A plurality of elastic suspensions and an upper end connected to a water tank connecting part provided at a lower part of the water tank via a first cushioning material, and a lower end connected to a lower part of the washing machine case and a housing connecting part. Through the cushioning material A plurality of anti-vibration dampers arranged in an oblique direction to suppress vibration of the water tank unit, and the water tank unit has an axis of a rotating shaft of the rotating drum directed from the front side toward the back side. The plurality of anti-vibration dampers are disposed in the washing machine casing so as to be inclined downward or substantially horizontal, and the plurality of vibration damping dampers are provided at least in the direction of rotation of the rotating drum during the dehydration process. A first anti-vibration damper disposed at a position closer to the front side than the position of the center of gravity; and a position closer to the rear side than the position of the center of gravity of the water tank unit provided on the direction side in which the rotating drum rotates during the dehydration process And a third vibration damping damper disposed on the opposite side of the direction in which the rotating drum rotates during the dewatering stroke, The housing connecting portion to which the vibration isolating damper and the second vibration isolating damper are coupled is attached to the washing machine housing via a third cushioning material, and is generated by a deviation of clothing. The vibration of the aquarium unit is attenuated in the front-rear and left-right directions by the first anti-vibration damper, the second anti-vibration damper, and the anti-vibration parts on the attachment part of the washing machine housing. Can be realized.

  According to a second invention, in the first invention, the housing connection portion of the first vibration isolation damper and the second vibration isolation damper is a housing connection portion mounting portion provided in the washing machine housing. The third cushioning material is configured to be attached with a bolt, a nut, and a washer, and the third cushioning material A is provided between the housing coupling portion and the housing coupling portion mounting portion. It consists of the 3rd shock absorbing material B provided between the said housing | casing connection part attachment part and the said washer, The said bolt is the said housing | casing connection part, the 3rd shock absorbing material A, and the said housing connection part attachment part. The nut is tightened through the third cushioning material B and the washer. When the first vibration damping damper vibrates in the left-right direction around the fixing bracket, the housing connecting portion and the washer also Vibrating, the third shock absorber A and the third shock absorber B are compressed back and forth, left and right, and damping is generated. And, it is possible to reduce the vibration of the water tank unit.

  According to a third aspect of the present invention, there is provided a washing machine casing, a water tank formed in a bottomed cylindrical shape, a bottomed cylindrical rotating drum opened on the front side and disposed in the water tank, and a bottom center of the rotating drum A rotating shaft supported by a bearing fixed to the bottom surface of the water tank, a drum driving motor fixed to a lower part of the water tank and rotating the rotating drum via the rotating shaft, and the water tank, rotating A water tank unit composed of a drum, a bearing, a rotating shaft, a drum drive motor, and the like, and a lower end connected to an upper part of the water tank and an upper end connected to an upper part of the washing machine casing, and the water tank unit is placed in the washing machine casing A plurality of elastic suspensions and an upper end connected to a water tank connecting part provided at a lower part of the water tank via a first cushioning material, and a lower end connected to a lower part of the washing machine case and a housing connecting part. Through the cushioning material A plurality of anti-vibration dampers arranged in an oblique direction to suppress vibration of the water tank unit, and the water tank unit has an axis of a rotating shaft of the rotating drum directed from the front side toward the back side. The plurality of anti-vibration dampers are disposed in the washing machine casing so as to be inclined downward or substantially horizontal, and the plurality of vibration damping dampers are provided at least in the direction of rotation of the rotating drum during the dehydration process. A first anti-vibration damper disposed at a position closer to the front side than the position of the center of gravity; and a position closer to the rear side than the position of the center of gravity of the water tank unit provided on the direction side in which the rotating drum rotates during the dehydration process And a third vibration damping damper disposed on the opposite side of the direction in which the rotating drum rotates during the dewatering stroke, The water tank connecting portion to which the vibration isolating damper and the second vibration isolating damper are connected is attached to the water tank via a fourth cushioning material. The vibration is attenuated in the front-rear and left-right directions by the first vibration-proof damper and the vibration-proof parts at the mounting portion of the second vibration-proof damper and the water tank, thereby realizing low vibration and low noise.

  According to a fourth invention, in the third invention, the water tank connecting portion of the first vibration isolating damper and the second vibration isolating damper includes a bolt, a nut, and a water tank connecting portion mounting portion provided in the water tank. The fourth cushioning material is configured to be attached with a washer, and the fourth cushioning material includes a fourth cushioning material A provided between the water tank coupling part and the water tank coupling part mounting part, and the water tank coupling part mounting part. A fourth buffer material B provided between the washers, and the bolt includes the water tank connecting portion, the fourth buffer material A, the water tank connecting portion mounting portion, the fourth buffer material B, and the washer. When the first vibration isolating damper vibrates in the left-right direction around the fixing bracket, the water tank connecting part and the washer also vibrate, and the fourth shock absorber A and the second Four shock absorbing materials B are compressed back and forth, left and right, causing attenuation, It is possible to reduce the vibration of the tank unit.

  According to a fifth invention, in any one of the first to fourth inventions, the third vibration damping damper is provided in the vicinity of the center of gravity of the water tank unit, and reduces vibration of the water tank unit. Therefore, low vibration and low noise can be realized.

(Embodiment 1)
1 is a longitudinal sectional view of a drum type washing machine according to an embodiment of the present invention, FIG. 2 is an internal front view of the drum type washing machine, and FIG. 3 is an internal top view of the drum type washing machine, FIG. 4 is a longitudinal sectional view of the first vibration damping damper, the second vibration damping damper, and the housing connecting portion of the drum type washing machine.

  1, 2, and 3, the rotating drum 17 is formed in a bottomed cylindrical shape, and a large number of water passage holes 18 are provided on the entire outer peripheral portion of the water tank 19 formed in a bottomed cylindrical shape. It is rotatably disposed in the water tank 19 via a bearing 16 inside the bearing case 15 attached to the bottom. A rotating shaft 20 is provided at the rotation center of the rotating drum 17, and the axial center direction of the rotating drum 17 is inclined downward from the front side toward the back side. A drum pulley 28 is connected to the back surface of the water tank 19 on the rotary shaft 20, and the rotary drum 17 is rotated in the forward and reverse directions by a drum drive motor 21 connected by the belt 29 and the drum pulley 28. Several projection plates 22 for stirring clothes are provided on the inner wall surface of the rotating drum 17. The rotating drum 17, the water tank 19, the drum drive motor 21, the bearing case 15, the drum pulley 28 and the like constitute a water tank unit 37.

  The water tank unit 37 is elastically supported in the washing machine casing 23 by a plurality of suspensions 31 having a lower end connected to the upper part of the water tank 19 and an upper end connected to the upper part of the washing machine casing 23. Further, the upper end is connected to a water tank connecting portion 43 provided at the lower portion of the water tank 19 via a first cushioning material 44, and the lower end is connected to the housing connecting portion 34 provided to the base portion 24 at the lower portion of the washing machine housing 23. The vibration of the water tank unit 37 is suppressed by the plurality of vibration isolation dampers 25, 26, and 27 arranged in an oblique direction by being connected to each other via the second buffer material 45.

  As shown in FIGS. 2 and 3, the vibration dampers 25, 26, and 27 are disposed on the right side when viewed from the front in the rotation direction of the rotating drum 17 during the dehydration stroke (right rotation as viewed from the front (clockwise, arrow A)). ) Are provided with a first vibration damping damper 25 and a second vibration damping damper 26, and in the opposite direction (right rotation as viewed from the front (clockwise, arrow A), left when viewed from the front when viewed from the front)). An anti-vibration damper 27 is provided. The first vibration isolation damper 25 is disposed in front of the center of gravity G of the water tank unit 37, and the second vibration isolation damper 26 is disposed behind the center of gravity G. As a result, the anti-vibration dampers 25 and 26 support the water tank unit 37 in a well-balanced manner and perform damping anti-vibration. In addition, when the rotation direction of the rotary drum 17 is set to the left rotation (counterclockwise) during the dehydration process, the rotation direction of the rotary drum 17 is the front surface. The anti-vibration damper may be disposed at a position opposite to the left and right when viewed from the right side (clockwise).

  Further, since heavy components such as the bearing case 15 and the drum drive motor 21 are arranged on the back side of the water tank unit 37, the center of gravity G of the water tank unit 37 is located behind the center 33 of the rotating drum 17. It will be.

  Therefore, when an unbalanced load is generated in front of the rotating drum 17, the distance from the center of gravity G to the unbalanced load is increased, and a so-called neck swing motion in which the front and rear portions of the aquarium unit 37 vibrate in the upside down direction, respectively. Likely to happen. Therefore, by making the angle of the first vibration isolating damper 25 closer to the vertical direction than the inclination angle of the third vibration isolating damper 27, the vibration in the vertical direction is positively suppressed, and this neck swinging motion is effective. Is suppressed.

  Further, when an unbalanced load is generated behind the rotating drum 17, the distance from the center of gravity G to the unbalanced load is reduced, and the roll motion at the rear of the water tank unit 37 is increased. Therefore, the angle of the second vibration damping damper 26 is made closer to the horizontal direction than the inclination angle of the third vibration damping damper 27 to effectively suppress this roll motion.

That is, as shown in FIG. 2, the angle between the first vibration isolation damper 25 and the vertical direction is α, the angle between the second vibration isolation damper 26 and the vertical direction is β, and the third vibration isolation damper 27 and the vertical direction. If the angle formed by γ is γ, three dampers are arranged so that α <γ <β.

  As described above, the first vibration damping damper 25 is particularly effective in the vertical direction (up and down direction in FIG. 2), and the second vibration damping damper 26 is particularly effective in damping the vibration in the horizontal direction (left and right direction in FIG. 2). To achieve efficient vibration isolation.

  Here, the damping force of the first anti-vibration damper 25 and the second anti-vibration damper 26 has the largest damping force of the third anti-vibration damper 27 in order to balance the left and right. In addition, the damping force of the first vibration damping damper 25 is made larger than that of the second vibration damping damper 26 in order to reduce the neck motion. Further, the damping force of the first vibration damping damper 25, the second vibration damping damper 26, and the third vibration damping damper 27 is within the range of the above condition in order to prevent vibration transmission to the base 24 and the floor of the housing. Therefore, the value is as small as possible within a range in which the vibration of the water tank unit 37 can be sufficiently suppressed.

  Moreover, the attachment structure of the 1st anti-vibration damper 25 and the base 24 of a housing | casing is comprised as shown in FIG. In other words, the first vibration damping damper 25 is attached to the casing connecting portion 34 via the second cushioning material 45, and the fixing member 35 is attached to the base portion 24 of the casing. A third cushioning material A38 is disposed between the housing connecting portion 34 and the fixing member 35, and a washer 36 and a fixing member 35 disposed on the opposite side of the housing connecting portion 34 from the first vibration damping damper 25. A third cushioning material B39 is disposed between the housing connecting portion 34 and the washer 36 by a stepped bolt 40 and a nut 41.

  Therefore, when the first vibration damping damper 25 vibrates in the left-right direction around the fixing member 35, the housing connecting portion 34 and the washer 36 also vibrate, and the third shock absorbing material A38 and the third shock absorbing material B39 are Attenuation occurs by being compressed, and the vibration of the water tank unit 37 is reduced. The method for attaching the second damper is also the same.

  Here, when the rotation of the rotating drum 17 at the time of dehydration is clockwise, the vibration of the water tank unit 37 is faster when the unbalanced load comes to the right side due to the influence of gravity and slows when it comes to the left side. Therefore, vibration can be effectively suppressed by using a buffer material in the fastening portion of the first vibration damping damper 25 and the second vibration damping damper 26 attached to the right side.

  The operation and action of the drum type washing machine configured as described above will be described.

  When the lid 30 is opened and the laundry is put into the rotating drum 17 and the operation is started, the rotating drum 17 is rotated at a low speed by the drum drive motor 21 in the washing process, and the laundry in the rotating drum 17 is lifted up. Is dropped on the surface of the water. Thus, the washing process proceeds.

  Then, after the washing process is performed for a predetermined time, the washing water in the water tank 19 is drained, intermediate dehydration is performed, and the subsequent rinsing process is performed. In the rinsing process, the same operation as the washing process is performed. In the dehydration process, the rotary drum 17 is rotationally driven at a high speed, and the laundry is centrifugally dehydrated.

  When the laundry put in the rotating drum 17 is offset during the dehydration process, the water tank unit 37 is swingably supported so as to be able to absorb the offset and perform the dehydration rotation. Although the transmission to the washing machine casing 23 is prevented, when an abnormally large deviation occurs, the water tank unit 37 causes abnormal vibration, and a large noise is generated from the washing machine. May damage the washing machine.

In the present embodiment, the first anti-vibration damper 25 is ahead of the center of gravity G of the water tank unit 37 in the rotation direction of the rotary drum 17, the second anti-vibration damper 26 is behind, and the direction opposite to the rotation direction of the rotary drum 17. The third anti-vibration damper 27 is provided, and each anti-vibration damper performs damping anti-vibration with a good balance.

  Further, since the first vibration damping damper 25 is arranged more vertically and the second vibration damping damper 26 is arranged more horizontally, vibrations in the vertical direction and the horizontal direction are reduced, and the first vibration damping damper 25 is arranged. By attaching the lower part of the second anti-vibration damper 26 to the housing via a cushioning material, not only in the stroke direction of the first anti-vibration damper 25 and the second anti-vibration damper 26 but also in the front-rear and left-right directions By providing damping, vibration of the water tank unit 37 is efficiently reduced.

  In the above-described embodiment, the configuration in which the cushioning material is interposed between the fastening portions of the first vibration isolation damper 25 and the second vibration isolation damper 26 is the housing connection portion of the base portion 24 at the lower portion of the washing machine housing 23. Although provided on the 34 side, the same effect can be obtained even if the same configuration is provided on the water tank connecting portion 43 side.

  As described above, the drum-type washing machine according to the present invention can efficiently perform the operation of the aquarium unit according to the arrangement position and the mounting angle of the first anti-vibration damper, the second anti-vibration damper, and the third anti-vibration damper. Since vibration can be attenuated and low vibration and low noise can be realized, it can be applied to other uses such as a washing machine having a dehydrating function.

DESCRIPTION OF SYMBOLS 17 Rotating drum 23 Washing machine housing | casing 25 1st anti-vibration damper 26 2nd anti-vibration damper 27 3rd anti-vibration damper 33 Center of a rotating drum 34 Housing | casing connection part 37 Water tank unit 38 3rd shock absorbing material A
39 Third cushioning material B
G Center of gravity of aquarium unit

Claims (5)

A washing machine casing, a water tank formed in a bottomed cylindrical shape, a bottomed cylindrical rotating drum opened on the front side and disposed in the water tank, and fixed to the center of the bottom surface of the rotating drum. A rotating shaft supported by a bearing fixed to the bottom surface, a drum driving motor fixed to the lower part of the water tank and driving the rotating drum via the rotating shaft, the water tank, the rotating drum, the bearing, and the rotating shaft And a plurality of water tank units configured by a drum drive motor and the like, and a lower end connected to an upper part of the water tank and an upper end connected to an upper part of the washing machine casing to elastically support the water tank unit in the washing machine casing. A suspension and an upper end are connected to a water tank connecting portion provided at a lower portion of the water tank via a first buffer material, and a lower end is connected to a lower portion of the washing machine housing via a second buffer material at the housing connecting portion. By linking Are arranged in an oblique direction and a vibration-proof damper plurality of suppressing vibration of the water tank unit,
The water tank unit is disposed in the washing machine casing such that the axis of the rotation shaft of the rotating drum is inclined downward or substantially horizontal from the front side toward the back side, and the plurality of vibration isolation dampers are In addition, at least during the dehydration process, the first anti-vibration damper disposed on the front side of the center of gravity of the water tank unit provided in the direction in which the rotating drum rotates, and during the dehydration process, A second anti-vibration damper disposed on the back side of the center of gravity of the water tank unit and provided in the direction of rotation of the rotating drum; and in the direction of rotation of the rotating drum during the dehydration process. The housing connecting portion, to which the first anti-vibration damper and the second anti-vibration damper are connected, is provided via a third cushioning material. Said washing Drum type washing machine installation in the housing. The housing connecting portions of the first vibration isolating damper and the second vibration isolating damper are configured to be attached to a housing connecting portion attaching portion provided in the washing machine housing with bolts, nuts, and washers. The third cushioning material includes a third cushioning material A provided between the housing connecting portion and the housing connecting portion mounting portion, and a space between the housing connecting portion mounting portion and the washer. And the bolt penetrates through the housing connecting part, the third buffering material A, the housing connecting part mounting part, the third buffering material B, and the washer. The drum type washing machine according to claim 1, wherein the nut is tightened. A washing machine casing, a water tank formed in a bottomed cylindrical shape, a bottomed cylindrical rotating drum opened on the front side and disposed in the water tank, and fixed to the center of the bottom surface of the rotating drum. A rotating shaft supported by a bearing fixed to the bottom surface, a drum driving motor fixed to the lower part of the water tank and driving the rotating drum via the rotating shaft, the water tank, the rotating drum, the bearing, and the rotating shaft And a plurality of water tank units configured by a drum drive motor and the like, and a lower end connected to an upper part of the water tank and an upper end connected to an upper part of the washing machine casing to elastically support the water tank unit in the washing machine casing. A suspension and an upper end are connected to a water tank connecting portion provided at a lower portion of the water tank via a first buffer material, and a lower end is connected to a lower portion of the washing machine housing via a second buffer material at the housing connecting portion. By linking Are arranged in an oblique direction and a vibration-proof damper plurality of suppressing vibration of the water tank unit,
The water tank unit is disposed in the washing machine casing such that the axis of the rotation shaft of the rotating drum is inclined downward or substantially horizontal from the front side toward the back side, and the plurality of vibration isolation dampers are In addition, at least during the dehydration process, the first anti-vibration damper disposed on the front side of the center of gravity of the water tank unit provided in the direction in which the rotating drum rotates, and during the dehydration process, A second anti-vibration damper disposed on the back side of the center of gravity of the water tank unit and provided in the direction of rotation of the rotating drum; and in the direction of rotation of the rotating drum during the dehydration process. A third anti-vibration damper disposed on the opposite side, wherein the water tank connecting portion to which the first anti-vibration damper and the second anti-vibration damper are connected is connected via the fourth cushioning material. Aquarium It is attached as in the drum-type washing machine. The water tank connection part of the first vibration isolation damper and the second vibration isolation damper is configured to be attached to a water tank connection part attachment part provided in the water tank with a bolt, a nut and a washer, and the fourth The buffer material is a fourth buffer material A provided between the water tank connecting portion and the water tank connecting portion mounting portion, and a fourth buffer material provided between the water tank connecting portion mounting portion and the washer. It is made of material B, and the bolt penetrates the water tank connecting part, the fourth buffer material A, the water tank connecting part mounting part, the fourth buffer material B, and the washer, and the nut is tightened. Item 4. The drum type washing machine according to Item 3. The drum type washing machine according to any one of claims 1 to 4, wherein the third vibration-proof damper is provided in the vicinity of the center of gravity of the water tank unit.

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