JP2004290704A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine that prevents noise during operation without enlarging a washing machine body. <P>SOLUTION: The washing machine has a body sheathing portion 1 having a laundry throwing-in opening 1a opened in the front, a bottomed cylindrical water tank 4 arranged in the body sheathing portion 1 and having an opening 4a opened oppositely to the laundry throwing-in opening 1a, a packing 10 made of an elastic body connecting the laundry throwing-in opening 1a and the opening 4a as if to form a passage, a drum 5 rotatably supported in the water tank 4, a driving mechanism 9 rotationally driving the drum 5, first and second suspenders 6 and 39 swingably suspending the water tank 4, a cushioning material 41 arranged between a swinger 40 and the inside wall 1b of the body sheathing portion 1 forming an overall weight suspended by the first and second suspenders 6 and 39. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an improvement in a drum type washing machine having a horizontal drum.

  Drum washing machines with horizontal drums that rotate about a substantially horizontal axis are widely used, especially in Europe. In general, drum-type washing machines have been commercialized which perform a washing operation including a washing step in which the drum rotates at a low speed, a rinsing step, and a dehydrating step in which the drum rotates at a high speed, and further perform a drying step.

  13 and 14 are a side view and a front view showing the inside of a conventional drum-type washing machine. As shown in these figures, a main body exterior part 1 is provided with a laundry input opening 1a which is opened and closed by an opening / closing door 3 on the front surface. A bottomed water tank 4 having an opening 4a on the front side is provided in the main body exterior part 1 horizontally. The water tank 4 has a double structure in which a bottomed cylindrical drum 5 is supported rotatably about a shaft 5e.

  The periphery of the laundry inlet 1a provided in the main body exterior 1 and the periphery of the opening 4a of the water tub 4 are connected by a packing 10 made of rubber or the like to prevent water leakage between the main body exterior 1 and the water tub 4. It is supposed to. A drive mechanism 9 for rotating and driving the shaft 5e is disposed behind the water tank 4.

  An angle 29a is bridged above a front part of the main body exterior part 1, and an angle 29b is attached to a rear inner wall of the main body exterior part 1. Angles 30a and 30b are provided at two places on the front and back sides of the water tank 4, respectively, and the first and second suspension devices 6, 7 formed by two front and rear tension springs are used for the angles 30a, 30b and the angles 29a, 29b. Hanged between. As a result, the water tank 4 is suspended from the main body exterior part 1.

  The washing, rinsing, spin-drying and drying steps are performed by rotating the drum 5 with the drive mechanism 9. At this time, the laundry is eccentric due to the centrifugal force, and the water tub 4 swings. The first and second suspension devices 6, 7 function to return the displaced water tank to a predetermined position, and the water tank 4 swings. Therefore, the water tank 4, the drum 5, the driving device 9, and the like constitute a rocking body 40 that rocks integrally. Further, the first and second suspension devices 6 and 7 are disposed symmetrically with respect to the vertical direction and inclined at an angle θ1 so as to center the swinging oscillator 40 at the center position in the left and right direction. I have.

  The lower part of the water tank 4 is supported from below by two right and left damping devices 8. The damping device 8 is composed of a damper, and functions to damp the vertical swing of the swing body 40. In addition, the damping device 8 is disposed symmetrically with respect to the vertical direction and inclined at an angle θ3 so as to attenuate the swing of the swing body 40 in the left and right direction.

  The first and second suspension devices 6 and 7 have the same tension springs 6a and 7a. To lower the mounting position of the rear portion of the water tank 4 and arrange the water tank 4 at a predetermined inclination angle θ, the first and second suspension devices 6 and 7 have the same tension. A linear portion 7b is provided at an end of the spring 7a. The rocking body 40 suspended on the first and second suspension devices 6 and 7 has a rear portion that is heavier than a front portion due to the bottom plate 4d of the water tank 4, the bottom plate 5f of the drum 5, the driving device 9, and the like. A metal weight 28 is provided in the upper front part. Due to the weight 28, the center of gravity W of the rocking body 40 is substantially intermediate (L1ＬL2) between the suspension positions (30a, 30b) of the first and second suspension devices 6, 7.

  However, according to the above-mentioned conventional drum type washing machine, it is possible to attenuate the rocking motion of the rocking body 40 in the up-down direction and the left-right direction by the damping device 8, but the damping of the rocking motion in the front-rear direction is not sufficient. Therefore, when a large swing occurs in the portion A in FIG. 13, the rear portion of the swing body 40 collides with the back plate 1 b of the main body exterior part 1 along with the swing of the swing body 40, and the washing and drying are performed. There was a problem of generating noise inside. Although it is possible to avoid the collision by increasing the gap of the portion A, there is a problem that the drum type washing machine becomes large.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a drum type washing machine capable of preventing noise during operation without increasing the size of the washing machine body.

In order to achieve the above object, a drum-type washing machine of the present application has a main body exterior portion having a laundry input port opened on a front surface, and an opening, and the opening is provided so as to face the laundry input port. A bottomed cylindrical water tank, a drum provided in the water tank, rotatably supported about an axis passing through an opening of the water tank, and a rotor fixed to a rotation axis of the drum, and the drum is driven to rotate. And a suspension device for suspending the water tub, wherein a cushioning material is disposed between the water tub or the motor and a back wall facing the opening of the outer tank portion of the main body.
In the drum-type washing machine having the above configuration, the cushioning material may be fixed to the back wall.
Further, in the drum-type washing machine having the above-described configuration, the cushioning material may be fixed to a portion of the water tub or the motor closest to the back wall.

  According to this configuration, the laundry is loaded into the drum disposed in the water tub from the laundry loading port and the opening on the front. The washing liquid is injected into the water tub, and the drum is rotated by the drive mechanism to perform washing. The rocking body, which is composed of a water tank, a drum, a driving device, and the like, is integrally rocked by the rotation of the drum, and rocks. Collision through and impact noise is prevented. The cushioning material is fixed to the rearmost part of the rocking body or to the inner surface of the back wall of the body exterior part.

  Further, in the drum-type washing machine having the above-described configuration, the suspension device is provided with an attenuating unit that attenuates swinging of the swinging body before and after. According to this configuration, the rocking motion of the rocking body in the front-back direction due to the rotation of the drum is attenuated by the damping portion of the suspension device, and the amount of rocking motion in the front-back direction is reduced.

  According to the present invention, since the cushioning material is provided between the rear portion of the oscillator and the back wall of the main body exterior portion, the rear portion of the oscillator and the back wall of the main body exterior portion collide with each other due to the oscillation of the oscillator. In addition, since shock noise is prevented from being generated by the cushioning material, noise during operation of the drum type washing machine can be prevented, and the dimension of the drum type washing machine in the depth direction can be reduced.

  In addition, since the suspension device that suspends the rocking body is provided with an attenuating portion that attenuates the rocking motion of the rocking body in the front-rear direction, the gap between the rocking body and the body exterior portion is reduced to reduce the depth of the drum type washing machine. The dimension in the direction can be made smaller.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of a drum-type washing machine according to a first embodiment of the present invention. The main body exterior part 1 forming the outer wall of the drum type washing machine can be opened and closed by an opening / closing door 3 on the front surface. An operation panel 11 provided with operation keys and a display unit is provided on an upper part of the front surface of the main body exterior unit 1.

  FIG. 2 shows a side sectional view of the drum type washing machine. A bottomed cylindrical water tub 4 having an opening 4a on the front surface is arranged in the main body exterior part 1. Although details will be described later, the water tank 4 is elastically supported by the first suspension device 6 and the second suspension device 39 in the main body exterior part 1 as shown in FIGS. Further, the oscillation of the water tank 4 is damped by the damping device 8.

  A drum 5 is arranged in the water tank 4. The bearing 6 is held by a motor case 9 a attached to the water tank 4. A shaft 5e integral with the drum 5 is supported by the bearing 6, and the drum 5 is rotatable. A rotor 9b is fixed to the shaft portion 5e, and a stator 9c facing the rotor 9b is fixed in the motor case 9a. When power is supplied to the stator 9c, the rotor 9b is rotated by a magnetic action. Thus, a driving mechanism 9 for driving the drum 5 is configured.

  A small hole 5 a is provided in the peripheral wall of the drum 5. The small holes 5a allow washing water to flow between the water tub 4 and the drum 5 during washing. A baffle 5b is provided on the inner wall surface of the drum 5 so as to protrude therefrom. The rotation of the drum 5 catches and lifts the laundry and drops it into the washing liquid to perform washing.

  A fluid balancer 5d is provided on the outer peripheral edge of the opening 5c on the front surface of the drum 5. Fluid such as salt water is sealed in the fluid balancer 5d, and the fluid moves when the drum 5 rotates, thereby canceling the shift of the center of gravity due to the offset of the laundry and the washing liquid. The fluid balancer 5d may be provided on the inner peripheral edge of the drum 5.

  The rotation axis y-y of the drum 5 is inclined so that the depth of the drum 5 is lowered by an angle θ with respect to the horizontal axis. Thereby, when the user stands and operates the drum type washing machine while standing on the front side, the user can look down to the depth of the drum 5 and have a better view.

  A packing 10 made of an elastic material such as rubber or soft resin is attached to the periphery of the laundry inlet 1a and the opening 4a of the water tub 4 so as to form a passage through which the laundry passes. The packing 10 has a structure in which the inner peripheral edge 10 a is in close contact with the peripheral edge of the door 3 when the door 3 is closed. Thereby, waterproofing during the washing operation is performed. Further, a bellows or the like is provided on the packing 10, and the packing 10 is bent according to the swing of the water tank 4 so as to follow.

  A water supply pipe 12 connected to a water pipe is provided in an upper part of the main body exterior part 1. When a water supply valve 13 provided in the middle of the water supply pipe 12 is opened, water is supplied into the water tank 4 from a water supply nozzle 15 attached to the door packing 10 via a detergent case 14.

  The drain duct 16 led out from the bottom of the water tub 4 is provided with a connection case 17 and a drain pump 18 in which a lint filter 17a is provided in the middle of the path, and the washing liquid from the water tub 4 is supplied to the outside of the main body exterior unit 1. It is configured to drain water. The lint filter 17a is formed by, for example, forming a resin in a lattice shape or forming fine fibers in a bag shape, and accumulates lint and the like in the washing liquid. The lint filter 17a is removably mounted in the connection case 17 and can be removed from the lower front part of the outer casing 1.

  A water level sensor 23 is provided above the connection case 17 from the air trap 22 via a pressure guiding pipe 21. The water level sensor 23 moves the magnetic body in the coil according to the pressure change in the air trap 22. The resulting change in inductance of the coil is detected as a change in oscillation frequency, and the water level in the water tank 4 is detected.

  FIG. 3 shows a sectional side view of the drum type washing machine different from FIG. 2, and a circulation duct 19 branching from a drain duct 16b is provided on the outlet side of the connection case 17. The circulation duct 19 is connected to the packing 10 so as to face the opening 4 a of the water tank 4, and includes a circulation pump 20 in the middle of the path.

  When the drain pump 18 is stopped and the circulation pump 20 is driven, a circulation path to the water tank 4 through the water tank 4, the drain duct 16a, the connection case 17, the drain duct 16b, the circulation pump 20 and the circulation duct 19 is formed. Is done. Thus, the washing liquid in the water tub 4 is circulated through the circulation path, the detergent in the washing liquid is sufficiently dissolved while passing through the circulation path, and the lint filter 17a removes lint and the like. Accordingly, it is possible to prevent the lint from re-adhering to the laundry.

  FIG. 4 shows a further different side cross section. Above the water tub 4, a drying unit 24 for drying the laundry constituted by a blower fan 25 and a heater 26 is provided. The drying unit 24 is disposed in the middle of the path of the cooling duct 27 that connects the outlet 4b facing the opening 4a of the water tank 4 and the circulation port 4c provided at the lower part. Further, a cooler 51 is provided in the cooling duct 27.

  In the above configuration, the control device 2 for controlling the operation of the drum type washing machine is arranged on the back surface of the operation panel 11, and executes the operation chart shown in FIG. The washing operation will be described below with reference to FIG. When the laundry is thrown in from the laundry inlet 1a and the opening / closing door 3 is closed, the inner peripheral edge 10a of the packing 10 comes into close contact with the peripheral edge of the opening / closing door 3, and the water tub 4 is sealed. Then, when the detergent is put in the detergent case 14 and the operation panel 11 is operated, the washing operation is started by a command from the control device 2.

  First, in the water supply operation of the “washing process”, the door 3 is locked and the water supply valve 13 is opened. Based on the opening of the water supply valve 13, the tap water flows into the water tank 4 and the drum 5 along with the detergent from the water supply nozzle 15 via the detergent case 14 on the way. Then, when the water level in the water tank 4 reaches a predetermined water level, the water level sensor 23 detects and the water supply valve 13 is closed, the driving mechanism 9 is driven to wash the drum 5 and the rotation is controlled according to the chart, and the washing operation is performed for a predetermined time. Is performed.

  The rotation of the drum 5 is set in a rotation chart according to the washing, rinsing, spin-drying and drying steps, or the rotation speed according to the type of the laundry, and further, the reversal time, the reversal period, and the like. It is programmed to be selected automatically.

  When the “washing process” is completed, the process proceeds to a “rinsing process” in which the rinsing dehydration operation and the stirring rinsing operation are alternately repeated a plurality of times. In the “rinsing step”, first, a drainage operation is performed in which the drainage pump 18 is operated to drain the washing liquid to the outside of the main body exterior unit 1 through the drainage duct 16 and the connection case 17.

  When the drainage operation is completed, the drum 5 rotates in the first dehydration chart, and the rinse dehydration operation is performed. The washing liquid of the laundry is discharged to the inner wall of the water tub 4 through the small holes 5a provided on the entire peripheral wall of the drum 5 by the centrifugal force generated by the spinning rotation. The washing liquid flowing down to the lower part of the water tub 4 along the inner wall is drained to the outside from the drain duct 16.

  During this rinse dehydration operation, the water supply valve 13 may be opened and tap water may be injected from the water supply nozzle 15 into the water tank 4. By doing so, the tap water can permeate the laundry by centrifugal force, and the detergent remaining on the laundry can be efficiently removed. The first dehydration chart is a chart suitable for dehydrating a washing liquid containing a large amount of detergent by stopping the rotation of the drum in the middle or changing the rotation speed.

  When the rinse dehydration operation is completed, a water supply operation is performed, the drain pump 18 is stopped, and the water supply valve 13 is opened again. When the water level in the water tank 4 reaches a predetermined level with the opening of the water supply valve 13, the water supply valve 13 is closed, and the drive mechanism 9 drives the drum 5 to rotate according to the rinse chart, thereby performing the stirring rinse operation.

  During this stirring and rinsing operation, a soft finish agent storage box (not shown) and a rinse water supply path communicating with the soft finish agent storage box may be separately provided, and water may be supplied from the rinse water supply route together with the soft finish agent. Further, the circulation pump 20 may be driven during the washing operation or the stirring and rinsing operation to circulate the washing liquid in the water tub 4.

  When the rinsing step is completed by repeating the above rinsing dehydration operation and the stirring rinsing operation several times, the program switches to the “dehydration step”. In the "dehydration step", first, a drain operation of closing the water supply valve 13 and operating the drain pump 18 to drain the washing liquid to the outside is performed.

  Then, the finish dehydration operation is performed by rotating the drum 5 in the second dehydration chart. In the finish dewatering operation, the washing liquid is discharged to the inner wall of the water tub 4 through the small holes 5a formed in the entire peripheral wall of the drum 5 by the centrifugal force generated by the dewatering rotation. Thereafter, the washing liquid flows down the inner wall of the water tub 4 to the lower part, and is drained to the outside from the drain duct 16.

  When the “dehydration step” is completed, the “drying step” is executed by rotating the drum 5 in the drying chart and driving the blower fan 25 and the heater 26. The air in the drum 5 passes through the small hole 5a of the drum 5, the circulation port 4c of the water tank 4, the cooling duct 27, the ventilation fan 25, the heater 26, and circulates into the drum 5 from the outlet 4b.

  The air having absorbed the moisture of the laundry in the drum 5 is sucked into the cooling duct 27 by the blower fan 25. The air is cooled by a cooler 51 provided in the cooling duct 27 while passing through the cooling duct 27, so that the temperature is lowered. As a result, the air in the cooling duct 27 is dehumidified by the dew condensation of the water, and becomes low humidity air to reach the heater 26.

  The air heated by the heater 26 becomes warm air and is blown into the water tub 4 from the outlet 4b, and comes into contact with the laundry again to absorb moisture. The air is again sucked into the cooling duct 27 from the circulation port 4a, and is similarly cooled and dehumidified by the cooler 51. By repeating this operation, the “drying step” is performed.

  Then, the humidity and temperature in the drum 5 are detected by a humidity sensor or a temperature sensor (not shown), and when a predetermined value is reached, the “drying process” is ended. The water condensed by the dehumidification in the “drying step” descends in the cooling duct 27 and is drained to the outside from the circulation port 4 c through the drain duct 16.

  As described above, based on the input from the operation panel 11, the control device 2 executes the steps of washing, rinsing, dehydrating, and drying according to the set conditions continuously or independently.

  6 and 7 are a side view and a front view, respectively, showing a suspended state of the water tub 4 of the drum type washing machine of the present embodiment. The water tank 4 is divided into a front water tank 41 having an opening 4a and a rear water tank 42 to which the drive mechanism 9 is attached, and is formed by resin molding. Thereby, the water tank 4 can be easily formed. The details of the joint between the front water tank 41 and the rear water tank 42 are shown in FIG. 9. At the respective end faces of the front water tank 41 and the rear water tank 42, the joint parts projecting radially from the body parts 41 a and 42 a in a flange shape. 41b and 42b are formed.

  A seal member 44 made of an elastic material such as rubber or resin is fitted on the joint 42b, and a protrusion 41c is provided on the joint 41b. By fastening the connecting portions 41b and 42b of the front water tank 41 and the rear water tank 42 with the screws 45, the seal member 44 is pressed by the protruding portions 41c, thereby preventing water leakage.

  As shown in FIG. 7, an angle 29 a is attached to the inner wall of the main body exterior part 1 at the upper front part of the water tank 4. An angle 30a is fixed to the front surface of the water tank 4. The first suspension device 6 composed of a tension spring is attached to the angle 29a and the angle 30a. Therefore, the front part of the water tank 4 is suspended at two places on the left and right by the first suspension device 6.

  As shown in FIG. 6, an angle 31 is attached to the upper part of the back wall of the main body exterior part 1, and an angle 35 (see FIG. 8) described later is fixed to the outer surface of the bottom plate 4d of the water tank 4. A second suspension 39 having a damping function is hung on the angles 31 and 35. Therefore, the rear part of the water tank 4 is suspended at two places on the left and right by the second suspension device 39. The drum 5, the driving device 9, and the like are suspended by the first and second suspension devices 6 and 39 integrally with the water tank 4, and constitute a rocking body 40 that rocks integrally by the rotation of the drum 5. The angles 30a and 35 may be formed integrally with the water tank 4.

  Further, the first and second suspension devices 6, 39 are mounted to be symmetrically inclined by angles θ1, θ2 with respect to the vertical direction, respectively. Accordingly, the left and right first and second suspension devices 6 and 39 generate elastic forces in opposite directions with respect to the swinging motion of the rocking body 40 (the water tank 4, the drum 5, the driving mechanism 9, etc.) in the left and right direction, and the rocking body 40 can be centered.

  FIG. 8 shows the details of the second suspension device 39. The compression spring 38 disposed on the outer periphery of the lower end of the rod 33 for suspending the water tank 4 includes a spring receiver 34 provided at the lower end of the rod 33 and an outer wall of the water tank 4. It is contracted between a water tank receiver 36 fitted to the provided angle 35.

  The rod 33 has an upper end suspended from an angle 31 fixed to the upper inner wall of the main body exterior unit 1 via a non-metallic rod receiver 32, and a lower end disposed to penetrate the angle 35 and the water tank receiver 36. The spring receiver 34 is provided at the lower end as described above.

  A second suspension 39 is constituted by the compression spring 38, the rod 33, the spring receiver 34, and the water tank receiver 36. Both the rod receiver 32 and the water tank receiver 36 made of non-metal are in spherical contact with the angles 31 and 35, and support the rod 33 so that it can freely swing back and forth and right and left.

  The water tank receiver 36 of the second suspension device 39 has a bell-shaped sleeve portion 36a whose lower end is opened so as to cover the compression spring 38. The sliding portion 34a of the spring receiver 34 that receives the lower end of the compression spring 38 has an outer diameter substantially equal to the inner diameter of the sleeve portion 36a, and the two are fitted together to form a sealed air chamber 37 in the sleeve portion 36a. With this configuration, when the water tank 4 moves up and down, the sleeve portion 36a moves up and down along the outer diameter of the sliding portion 34a.

  In addition, the inner surface of the sleeve portion 36a and the outer surface of the sliding portion 34a are protected by applying a lubricant or processing with Teflon (registered trademark) to improve the slidability. Then, as the water tank 4 moves up and down, the air in the sealed air chamber 37 is compressed and expanded. Accordingly, the sleeve portion 36a and the sliding portion 34a constitute a damping portion for damping the swing of the water tank 4, and a damping function is added to the second suspension device 39. Further, the damping effect may be reduced by providing a vent hole for communicating the sealed air chamber 37 with the outside air in the water tank receiver 36 or the like.

  As described above, since the second suspension device 39 is arranged to be inclined by the angle θ2 in the left-right direction, the swing of the rocking body 40 can be performed only in the vertical direction by the second suspension device 39 having the damping function. It can also be attenuated in the left and right directions. Further, as shown in FIG. 6, since the first and second suspension devices 6, 39 are arranged at an angle θ4, θ5 in the front-rear direction, they are centripetal with respect to the rocking motion of the rocker 40 in the front-rear direction. Has a function.

  The damping device 8 supports the front of the water tank 4 from below, and the water tank 4 is attached to the bottom wall 1 c of the main body exterior unit 1. FIG. 10 is a sectional view showing the damping device 8. The damping device 8 has a piston 83 that slides on the inner wall of the cylinder 82 with resistance. The piston 83 is attached to the lower end of the rod 81, and moves up and down according to the swing of the water tank 4.

  A hollow hook portion 81a is formed at the upper end of the rod 81, and a bush 85 made of an elastic material such as rubber or resin is embedded in the inner periphery of the hook portion 81a. Inside the push 85, a sleeve 84 made of a hard resin or metal is provided. Similarly, a hook 82 a is formed at the lower end of the cylinder 82, and a bush 85 and a sleeve 84 are provided.

  The piston 83 is provided with one or more seals 83a made of an elastic material such as rubber or resin around the piston 83. The seal body 83a is slidable with resistance to the inner wall of the cylinder 83, and the vertical movement of the rod 81 can be attenuated by the resistance during sliding. By varying the sliding resistance of the sliding piston 83, it is possible to freely create damping devices having different damping coefficients.

  Alternatively, the cylinder 82 may be hermetically sealed by filling a liquid such as oil or a gas such as air in the cylinder chamber 82b below the piston 83. In this way, the enclosed fluid is compressed and expanded with the vertical swing of the rod 81, and the swing can be attenuated. At this time, a hole (not shown) communicating with the cylinder chamber 82c above the piston 83 is provided, and a damping device having a different damping coefficient can be freely formed due to a movement resistance when the sealed fluid passes through the hole. Is possible.

  As shown in FIG. 9 described above, the hook portion 81 a of the rod 81 has a bolt 86 inserted into the sleeve 84, and is fixed to the attachment portion 46 which is integrally provided so as to protrude from the body portion 41 a of the front water tank 41. A bolt 87 is inserted through the sleeve 84 of the hook portion 82 a of the cylinder 82, and is fixed to the attachment portion 47 protruding from the bottom wall 1 a of the main body exterior portion 1 by a nut 88.

  Thereby, the water tank 4 is connected to and supported by the body exterior part 1 by the damping device 8. The mounting posture of the damping device 8 may be upside down. Further, the mounting portion 47 may be separated from the bottom wall 1a and fixed to the bottom wall 1a.

  The shafts of the bolts 86 and 87 have steps 86 a and 87 a longer than the width of the sleeve 84. Thus, the sleeve 84 can freely rotate with respect to the steps 86a and 87a. Accordingly, the damping device 8 swings following the swing of the water tank 4 in the left-right direction (the direction perpendicular to the paper surface).

  Further, the diameter of the seat surfaces 86b, 87b of the bolts 86, 87 and the seat surfaces 46a, 47a of the mounting portions 46, 47 are formed to be smaller than the outer diameter of the bush 85. Thereby, the swing of the water tank 4 in the front-rear direction can be absorbed by the elastic force of the bush 85 to attenuate the swing.

  In FIG. 6, a cushioning member 55 made of an elastic material such as felt, rubber, or a leaf spring is fixed to a portion of the back wall 1b of the main body exterior portion 1 facing the rearmost portion of the rocking body 40. Thereby, when the water tank 4 (oscillating body 40) swings in the front-rear direction, generation of noise due to collision between the water tank 4 and the back wall of the main body exterior unit 1 is prevented. Weights 56 and 57 made of metal and having a large mass are attached to the lower front and lower rear portions of the water tank 4. The weights 56 and 57 are provided to increase the weight of the rocking body 40 and reduce the influence of the weight of the eccentric laundry on the rocking amount.

  According to the above-described suspension method, when the drum 5 rotates in the dehydration step or the like, the laundry or the like disposed in the drum 5 is eccentric due to the centrifugal force, and the first and second suspension devices 6 and 39 expand and contract to form an oscillating body. 40 swings. The vertical swing of the rocking body 40 is damped by the damping device 8 and the damping portion of the second suspension device 39 (see FIG. 8). Since the damping device 8 and the second suspension device 39 are arranged symmetrically at right and left angles θ3 and θ2 (see FIG. 7) with respect to the vertical direction, the rocking body 40 swings in the left and right direction. Motion is damped.

  Since the first and second suspension devices 6 and 39 are arranged to be inclined in the front-rear direction by the angles θ4 and θ5 (see FIG. 6), the damping portion of the second suspension device 39, the expansion and contraction resistance of the packing 10 and Due to the elasticity of the bush 85, the swing of the swing body 40 in the front-rear direction is attenuated. Thus, even if the gap between the oscillating body 40 and the main body exterior part 1 is reduced, collision due to oscillating can be prevented.

  Further, depending on the state of the laundry and the washing liquid in the drum 5, the tub 4 may be largely eccentric due to the movement of the laundry and the washing liquid when the rotation of the drum 5 is started, and the water tub 4 may swing greatly. In such a case, even if the rear portion of the oscillating body 40 collides with the back wall 1b of the main body exterior part 1, the shock absorbing material 55 prevents generation of an impact sound. For this reason, it is possible to prevent noise during operation of the drum type washing machine and reduce the size of the drum type washing machine in the depth direction.

  As shown in FIG. 11, the back wall 1 b of the main body exterior unit 1 may be attached and detachable by screws 58. This makes it possible to replace the buffer material 55 that is deteriorated by the impact of the collision. Further, as shown in FIG. 12, the cushioning material 55 may be fixed to the driving device 9 arranged at the rearmost part of the rocking body 40 to cushion. Further, as shown in FIG. 7, the width of the drum type washing machine can be further reduced by providing the cushioning material 55 between the inner surface of the side wall 1d of the main body exterior part 1 and the rocking body 40.

It is a perspective view showing a drum type washing machine of an embodiment of the present invention. It is a side sectional view showing a drum type washing machine of an embodiment of the present invention. It is a side sectional view of other cut surfaces of a drum type washing machine of an embodiment of the present invention. It is a side sectional view of another cut surface of a drum type washing machine of an embodiment of the present invention. It is a chart figure showing washing operation of a drum type washing machine of an embodiment of the present invention. It is a side view showing the suspended state of the drum type washing machine of an embodiment of the present invention. It is a front view showing the suspended state of the drum type washing machine of an embodiment of the present invention. It is sectional drawing which shows the 2nd suspension device of the drum type washing machine of embodiment of this invention. It is a principal part detailed view which shows the attachment state of the damping device of the drum type washing machine of embodiment of this invention. It is a side view which shows the damping device of the drum type washing machine of embodiment of this invention. It is a principal part detailed view which shows the other attachment state of the cushioning material of the drum type washing machine of embodiment of this invention. It is a principal part detailed view which shows the other attachment state of the cushioning material of the drum type washing machine of embodiment of this invention. It is a side view which shows the suspended state of the conventional drum type washing machine. It is a front view showing the suspended state of the conventional drum type washing machine.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Body exterior part 2 Control device 3 Opening / closing door 4 Water tank 5 Drum 6 First suspension device 8 Damping device 9 Driving mechanism 10 Packing 12 Water supply pipe 13 Water supply valve 16 Drain duct 17 Connection case 18 Drain pump 20 Circulation pump 23 Water level sensor 24 Drying Unit 25 Blower fan 26 Heater 27 Cooling duct 29a, 30a, 31, 35 Angle 33 Rod 34 Spring receiver 37 Sealed air chamber 38 Compression spring 39 Second suspension device 40 Oscillator 41 Front water tank 42 Rear water tank 46, 47 Mounting part 54
55 cushioning material 56, 57 weight 81 rod 82 cylinder 83 piston

Claims (4)

A main body exterior having a laundry input port opened on the front,
A bottomed cylindrical water tub having an opening, the opening being provided so as to face the laundry input port,
A drum provided in the water tank and rotatably supported around an axis passing through an opening of the water tank;
A motor having a rotor fixed to the rotation axis of the drum and driving the drum to rotate,
And a suspension device for suspending the water tank,
A drum-type washing machine, wherein a cushioning material is provided between the water tub or the motor and a back wall facing the opening of the main body outer tub.   The drum type washing machine according to claim 1, wherein the cushioning material is fixed to the back wall.   2. The drum type washing machine according to claim 1, wherein the cushioning material is fixed to a portion of the water tank or the motor closest to the back wall. 3.  The drum type washing machine according to any one of claims 1 to 3, wherein the suspension device includes a damping portion for damping swinging of the water tub back and forth.

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