JP2009153651A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine by which the durability of a support system is maintained and vibration performance is improved to be silent without increasing the weight of the washing machine. <P>SOLUTION: In the washing machine, by providing a swing regulation means 13 for reducing the swing of an outer tub 2 only when the outer tub 2 is displaced downwards by the weight of clothes and water in a drum 5 during a washing process on the lower part of the outer tub 2, the rigidity of the support system such as an elastic support means 3, an upper support means 4 and bellows 8 can be set low. Thus, the resonance vibrations of the outer tub 2 during a dewatering process and vibration transmission to an outer frame 1 in regular time are reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a washing machine for washing clothes and the like.

Conventionally, in this type of washing machine, the weight of the outer tub is increased in order to suppress a large vibration of the outer tub at the time of dehydration activation due to the eccentric load of clothes (for example, see Patent Document 1). As shown in FIG. 16, the outer frame 1, the outer tub 3 supported by the suspension 2 in the outer frame 1, the drum 4 rotating around the horizontal axis in the outer tub 3, and the motor for driving the drum 4 5, a damper 6 provided between the lower part of the outer tub 3 and the main body 1, a vibration sensor 7 for detecting the vibration condition of the outer tub 3, and a vibration suppression tank 8 for accumulating water according to the vibration condition. The tank 8 is filled with water at the time of dehydration activation, and a large vibration at the time of dehydration activation can be suppressed by the weight of the water filled in the tank 8.
JP-A-5-131075

  However, when the tank 8 is filled with water and the vibration of the outer tub 3 is suppressed by increasing the weight of the water, the load applied to the suspension 2 and the damper 6 that supports the outer tub 3 is increased. The durability will also decrease because it increases. Further, when the vibration suppression effect is obtained by using the oscillation energy of the water in the tank 8, it is necessary to adjust the natural frequency of the oscillation mode of the water so that it is close to the resonance frequency of the outer tub 3. Since the resonance frequency of the outer tub 3 varies depending on the amount of clothing, it is difficult to adjust. Further, the cost increases because a vibration sensor 7 for detecting the vibration of the outer tub 3, a new tank 8 for suppressing vibration, and a device for supplying and discharging water into the tank 8 are also required. Resulting in.

  The present invention solves the above-mentioned conventional problems, and provides a washing machine with improved vibration performance without increasing the weight of the outer tub and without requiring complicated adjustment for installation. With the goal.

  In order to solve the above-mentioned conventional problems, the washing machine of the present invention is provided with a swing restricting means composed of a rod-like body at the lower part of the outer tub. In this swing regulating means, one end of the rod-shaped body is attached to the lower part of the outer tub, and clothes and water enter the drum during washing, and when the outer tub is displaced downward, the other end of the rod-shaped body is It is intended to contact the lower part of the frame.

  As a result, even when the elastic force (hardness) of the suspension supporting the outer tub and the bellows for watertightness of the outer tub is small, the outer tub does not fall down when water or clothing enters the drum during washing. Suspension can be secured because it ensures static balance and can suppress large swinging that the outer tub collides with the outer frame when the rotation speed of the drum that may occur during washing is low. By reducing the elastic force of the bellows and the bellows, the effect of reducing the vibration of the outer tub at the start of dehydration and the effect of reducing the transmission of vibration from the outer tub to the outer frame at the time of dehydration steady can be obtained.

  The washing machine of the present invention has a configuration in which a rod-like body serving as a swing restricting means is simply attached to the lower part of the outer tub, and the vibration of the outer tub is detected using a vibration sensor, and water supply / drainage is controlled. This is to reduce the vibration of the outer tub without making complicated adjustments, and can be configured at a relatively low cost. Further, since it does not increase the weight of the washing machine, it supports the outer tub. The anti-vibration performance can be improved without increasing the load on the means and without reducing the durability.

  According to a first aspect of the present invention, there is provided an outer frame, an outer tub elastically supported in the outer frame, a cylindrical drum provided with an opening on the front surface side and rotatably provided in the outer tub, and the drum A drive motor for rotationally driving; elastic support means for supporting the outer tub and suppressing vibration; and sway restriction means provided at a lower portion of the outer tub, wherein the sway restriction means is one end of the rod-shaped body. Is attached to the lower part of the outer tub, and when clothes and water enter the drum during washing and the outer tub is displaced downward, the other end of the rod-shaped body comes into contact with the lower part of the outer frame. And when the water or clothing enters the drum during washing, the swing restricting means supports the outer tub from below, ensuring a static balance so that the outer tub does not fall down, and The frictional force due to the rod-shaped body coming into contact with the lower part of the outer frame becomes a damping force, Drum can be reduced oscillation of the outer tub which occurs when the garment is biased in the drum when rotated efficiently at low rotational speed 濯時. In addition, since it is not necessary to increase the rigidity of the spring of the elastic support means in order to reduce the swinging of the outer tub that occurs when the drum at the time of washing rotates at a low rotational speed, The resonance vibration of the outer tub and the transmission of vibration transmitted from the outer tub to the outer frame at the time of steady dehydration can be reduced.

  In the second invention, in particular, in the first invention, by providing an elastic body at either the other end of the rod-shaped body or the lower portion of the outer frame, when the rod-shaped body and the lower portion of the outer frame are in contact, only a frictional force is generated. In addition, a damping force due to the deformation of the elastic body can be generated, and the effect of reducing the swinging of the outer tub can be further improved.

  In a third aspect of the invention, particularly in the first or second aspect of the invention, by providing a limiting means for restricting the swinging of the rod-shaped body at the lower part of the outer frame, the rod-shaped body is regulated so as not to swing greatly beyond a specified value. When the clothes are largely biased during washing, the outer tub swings greatly, but the outer tub can be prevented from colliding with the outer frame.

  In particular, according to a fourth aspect of the present invention, in any one of the first to third aspects, by providing a plurality of swing restricting means in the left-right direction of the outer tub, the outer tub is supported more stably. The direction swing can be further effectively reduced.

  In the fifth invention, in particular, in any one of the first to fourth inventions, the length of the left-right direction is longer than the length of the other end of the rod-like body in the front-rear direction. It is possible to further improve the strut force against the movement that falls in the direction, more stably support the outer tub, and effectively reduce the lateral swing of the outer tub.

  According to a sixth aspect of the invention, in particular, in any one of the first to fifth aspects of the invention, by providing a plurality of swing restricting means in the front-rear direction of the outer tub, the clothes are biased forward or backward in the drum during washing. Even in this case, it is possible to reduce both the front and rear oscillations of the outer tub.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a sectional view of a washing machine according to a first embodiment of the present invention as seen from the side, and FIG. 2 is a front view.

  As shown in FIG. 1, a cylindrical outer tub 2 having an opening on the front side is provided inside the outer frame 1, and two elastic support means 3 are provided from below the outer tub 2. Is supported elastically by the upper support means 4, absorbs the vibration of the outer tub 2 in the washing and dehydration process by the elastic support means 3, and is supported by the upper support means 4 so that the outer tub 2 does not fall down. It has become.

  As shown in FIG. 3, the elastic support means 3 includes, for example, a spring 30 that elastically supports the outer tub 2 and a damper 31 that suppresses vibration of the outer tub 2, and a method for attaching the elastic tub 3 to the outer tub 2 and the outer frame 1. For example, the elastic support means 3 is provided with anti-vibration rubber 32 at the upper and lower ends, and is fixed by sandwiching a jig 34 that is fixed in advance to the floor of the outer tub 2 or the outer frame 1 through a washer 33. To do. Moreover, as the upper support means 4, a spring is used and both ends are fixed to the outer frame 1 and the outer tub 2, respectively. In addition, a cylindrical drum 5 that houses clothing 20 is rotatably provided inside the outer tub 2 and is driven to rotate by a drive motor 6. Here, in the outer frame 1, the outer tub 2 and the drum 5 are provided so that the back surface is lowered from the front surface so that the user can easily take out the clothes. It is inclined 30 degrees. On the front surface of the outer frame 1, an opening 1 a for inserting and removing the clothing 20 and a door 7 for opening and closing the opening 20 are provided. Similar openings 2a and 5a are provided on the front side of the outer tub 2 and the drum 5, and the opening 2a of the outer tub 2 is connected to the opening 1a of the outer frame 1 by a bellows 8 in a watertight manner. The bottom of the outer tub 2 has a drain port 9 for discharging washing water and is connected to a drain valve 10.

  Moreover, the overflow tank 50 is provided in the outer tank 2, and when water is supplied above a predetermined water level, the overflowed water flows to the drainage hose 11 via the overflow hose 51 and is discharged outside the apparatus. .

  The control means 12 controls the washing and dehydrating processes by driving the drive motor 6, the drain valve 10 and the like.

  Furthermore, in the washing machine of the present invention, the swing restricting means 13 is provided at the lower part of the outer tub 3. The position where the swing restricting means 13 is provided may be located anywhere as long as it is an empty space below the outer tub 3. However, in the present invention, the effect of suppressing the swing of the outer tub 3 as described later is further exhibited. As shown in FIGS. 1 and 2, the lower part of the outer tub 3 is provided at a relatively central position when viewed from the front. As shown in FIG. 1, in the conventional washing machine without the swing restricting means 13, the elastic support means 3 is supported on the relatively rear side of the outer tub 2, so that the rear sway of the outer tub 3 can be easily suppressed. However, the front has a structure that is relatively easy to shake because there are few things to support.

  Next, a specific configuration of the swing restricting means 13 will be described.

  The swing restricting means 13 of the present invention is mainly composed of a rod-shaped body 14 as shown in FIG. 4, and one end of the rod-shaped body 14 is attached to the lower part of the outer tank 2, and the elastic support means 3 is attached to the outer tank 2. In the same manner as described above, the anti-vibration rubber 15, the attachment jig 16, and the washer 17 are attached. As shown in FIGS. 1 and 2, the other end of the rod-like body 14 has a gap so as not to contact the outer frame lower portion 18 when water and clothing are not contained in the drum 5.

  As shown in FIG. 5, when water 21 or clothing 20 enters the drum 5 during the washing process, the other end of the rod-like body 14 displaces the outer tub 2 downward due to its weight, and at the same time the outer frame lower portion 18. It comes to contact. In this state, when the outer tub 2 tries to sway in the left-right direction when viewed from the opening (front), a frictional force is generated at the contact portion between the rod-like body 14 and the outer frame 18, so that the outer tub 2 swings. Be regulated. That is, the rod-shaped body 14 is configured to contact the outer frame lower portion 18 only during the washing process, and is effective only during the washing process. Next, the reason for configuring in this way will be described.

  The washing machine as presented in the present invention has a problem that vibrations caused by the clothing 20 being biased to a part in the drum 5 during the dehydration process are large. This vibration can be broadly classified into resonance vibration of the outer tub 2 at the start of dehydration and vibration of the outer rim 2 due to transmission of vibration of the outer tub 2 at the time of steady dehydration to the outer frame 2.

  About the vibration of this outer tub 2, although it depends on the unevenness of the clothes 20 during the dehydration process, most of the vibration is as shown in FIG. 6, and as the number of rotations of the drum 5 increases during the dehydration process, First, a primary resonance in which the vibration in the left-right direction becomes particularly large is generated, and thereafter, the vibration becomes gradually smaller through a secondary resonance in which the vibration in the vertical direction becomes particularly large, and a steady state is reached. In the washing machine, it is necessary to reduce these vibrations as much as possible. As a method for this, the elastic support means 3 and the upper support means 4 that support the outer tub 2 against the resonance vibration of the outer tub 2 at the time of activation. It is conceivable to reduce the rigidity of the support system such as the bellows 8 and increase the attenuation of the support system. Further, as a method for reducing the transmission of the vibration of the outer tub 2 to the outer frame 1 in a steady state, it is necessary to reduce the rigidity and damping of the support system.

  Among these, since the countermeasures for attenuation are different between startup and steady state, it is necessary to configure each support means in consideration of the balance between the two. With regard to the rigidity, it becomes a countermeasure against vibration at both startup and steady state by making it small. However, if it is made too small, the outer tub 2 cannot be stably supported and the drum 5 is rotated at a low speed (outside) during the washing process. When the outer tank 2 is rotating in a band whose rotational speed is lower than the resonance point of the tank 2, the vibration in the left-right direction of the outer tank 2 increases, and when it is severe, the outer tank 2 collides with the outer frame 1. Problems occur.

  Here, the horizontal vibration of the outer tub 2 increases because when the drum 5 has a low rotational speed, there is a primary resonance in which the horizontal vibration increases as shown in FIG. This will be described with reference to FIG. 7. During the washing process, the drum 5 rotates at a rotation speed lower than the primary resonance point of the outer tub 2, and at that time, the one with higher rigidity of the support system Vibration can be suppressed.

  As described above, in order to reduce the vibration during the dehydration process, it is necessary to reduce the rigidity of the support system, but the support stability of the outer tub 2 and the relatively low during the washing process. Considering the oscillation at the rotational speed, it is necessary to increase the rigidity of the support system to some extent. The reason why the rod-like body 14 of the swing restricting means 13 mentioned above is brought into contact with the lower part 18 of the outer frame only during the washing process to restrict the swing of the outer tub 2 is to solve this problem.

  During the washing process, first, when the rod-shaped body 14 comes into contact with the outer frame lower portion 18, the swing restricting means 13 becomes a support body that supports the outer tub 2, and the outer tub 2 can be supported more stably. In this state, when the outer tub 2 swings in the left-right direction as viewed from the opening (front), friction is generated at the contact portion between the rod-like body 14 and the outer frame lower portion 18, which becomes a damping force and becomes an outer tub. Suppress the swing of 2.

  Therefore, during the washing process, the support stability and swing suppression effect of the outer tub 2 are increased by the action of the swing restricting means 13, so that the rigidity of the support system can be reduced correspondingly. As described above, reducing the rigidity of the support system has the effect of reducing both the vibration at the start-up and the steady-state during the dehydration process, so that the vibration during the dehydration process can be reduced.

  Here, it is necessary to bring the rod-like body 14 into contact with the outer frame lower portion 18 only during the washing process, and if it is in a state of contact during the dehydration process, extra rigidity and damping are added to the support system, This is because the vibration of the outer tub 2 may be deteriorated.

  Next, the gap between the rod-like body 14 and the outer frame lower portion 18 will be described. As described above, this gap needs to be vacated during the dehydration process so as to disappear only during the washing process. In order to realize this, it is necessary to consider the following conditions.

  ((1) The amount of downward displacement of the outer tub 2 due to the weight of clothes during the dehydration process) and ((2) The maximum amount of displacement downward due to the vibration of the outer tub 2 during the dehydration process) , ((3) The minimum amount of displacement downward of the outer tub 2 due to the weight of water and clothes during the washing process) is required to be large.

  Next, a specific example of the gap will be shown. First, (1) will be described. Although this depends on the weight of the clothes to be washed, it is a standard clothes capacity and a clothes capacity that tends to increase vibration during dehydration in a currently available 8-9 kg capacity type washing machine. If the clothing is 6 kg, the clothing is considered to be about twice as much as 10 kg in a state containing water. If the rigidity of the support system at that time is 10 N / mm, the displacement of (1) is about 10 mm. About (2), it is about 15 mm at the maximum from the vibration test. From these, the amount of downward displacement of the outer tub 2 during the dehydration process is about 25 mm. (3) is about 30 to 40 mm depending on the clothes to be washed and the capacity of water. Here, the maximum value of 40 mm is when the spring of the elastic support means 3 is almost fully compressed.

  In consideration of these, the gap between the rod-like body 14 and the outer frame lower portion 8 may be about 30 mm. The numbers here are examples of some types of washing machines, but if you consider each of the values shown here, you can determine how much clearance you need to set. Is considered easy.

  In the above configuration, this operation will be described next. In the washing process, water is supplied until the water level reaches a predetermined water level in the outer tub 2 with the drain valve 10 closed, and the clothes 20 are washed by rotating the clothes 20 and the drum 5 containing the washing water by the drive motor 6. Do. At this time, the outer tub 2 is displaced downward due to the weight of the clothing 20 and the washing water, and the swing restricting means 13 provided below the outer tub 2 comes into contact with the outer frame lower portion 18. In this state, the outer tub 2 is attached to the outer frame 1 by the above-described effect of suppressing the swing of the swing restricting means 13 even when the swing of the outer tub 2 increases due to the bias of the clothing 20 during the washing process. There will be no collision.

  After the washing process, the rinsing process is started. Also in the rinsing step after washing, water is supplied into the outer tub 2 as in the washing step, and the garment 20 is rinsed by rotating the drum 5. In the dehydration step, the drain valve 10 is opened to drain water to the outside of the machine, and the drum 5 containing the clothing 20 is rotated at high speed by the drive motor 6 to dehydrate.

  At this time, when the water is drained, the outer tub 2 becomes lighter and is displaced upward, and the swing restricting means 13 is separated from the lower part 18 of the outer frame. In the dehydration step, the rotation of the drum 5 is gradually increased. However, when the clothes 20 are biased to a part of the drum 5 during the washing process, that is, when the clothes 20 is in an unbalanced state. When the vibration frequency due to the rotation of the drum 5 approaches the resonance frequency of the outer tub 2, the vibration of the outer tub 2 increases, and when the unbalanced state is large, the outer tub 2 collides with the outer frame 1 and is severe. The outer frame 1 moves. As described above, the vibration of the outer tub 2 during the dehydration process depends largely on the rigidity of the support system (the elastic support means 3, the upper support means 4, the bellows 8, etc.) that supports it.

  Generally, in a washing machine, such vibration is reduced mainly by absorbing it by a damper of the elastic support means 3 that supports the outer tub 2 from below. As described above, the vibration of the outer tub 2 when the drum 5 is rotated at a low rotational speed during the washing process is suppressed by the swing restricting means 13, so that the rigidity of the support system can be reduced. The resonance vibration of the outer tub 2 and the vibration of the outer frame 1 in a steady state can be reduced. The vibration absorbing effect of the elastic support means 3 can be effectively exhibited and the vibration of the outer tub 2 can be reduced more effectively. In the present invention, the outer tub 2 is not increased without increasing the weight of the outer tub 2. Since the excessive force applied to the elastic support means 3 due to the vibration can be reduced and the vibration can be reduced, the durability of the support system such as the elastic support means 3 can be further improved.

(Embodiment 2)
FIG. 8 shows a washing machine according to the second embodiment of the present invention, and FIG. 9 shows the swing restricting means 13. In the present invention, in particular, an elastic body 19 is provided at a contact portion between the rod-like body 14 and the outer frame lower portion 18 of the swing restricting means 13 of the first embodiment, and the elastic body 19 is at least of the rod-like body 14 or the outer frame lower portion 18. Provide either one. For the elastic body 19, for example, a vibration-proof rubber is used.

  As a result, not only the frictional force but also the damping force due to the deformation of the vibration isolating rubber can be applied to the contact portion between the swing restricting means 13 and the outer frame lower portion 18. In the first embodiment, considering that the swing of the outer tub 2 in the washing process has a large component in the left-right direction, the purpose was to reduce the swing of the outer tub 2 in the left-right direction. The outer tub 2 performs not only the translational movement in the left-right direction but also the rotational movement as shown by A in FIG. 8, which is considered to be the force that further increases the vibration in the left-right direction of the outer tub 2. It is done.

  In the washing machine of the present invention, when the force A is generated, a force as indicated by B in FIG. 8 acts on the swing restricting means 13, and the vibration isolating rubber of the elastic body 19 is deformed by this force B, and the damping force As a result, the force B can be attenuated, and the swinging of the outer tub 2 can be more effectively reduced. Further, since the contact portion is the elastic body 19, the swing restricting means 13 and the outer frame lower portion 18 are in contact with each other, and noise is less likely to be generated at the contact portion when the swing is generated. Further, as shown in FIG. 9B, if a contact portion between the swing restricting means 13 and the outer frame lower portion 18 is provided with a protrusion-like shape, the frictional force at the time of contact is increased. The swing of the outer tub 2 can be further reduced.

  As shown in the present embodiment, providing the elastic body 19 at the contact portion has another effect. In the first embodiment, in order to determine the gap between the swing restricting means 13 and the outer frame lower part 13, the swing restricting means 13 and the outer frame lower part 18 are not in contact with each other during the dehydration process. It was stated that the maximum amplitude of the outer tub 2 should be taken into account, and the maximum amplitude at that time was determined by vibration testing. However, when the user actually uses it, the outer tub is rarely used due to aging deterioration of the product. It is also conceivable that 2 vibrates with an amplitude larger than expected.

  In this case, it is conceivable that the swing restricting means 13 and the outer frame lower portion 18 come into contact with each other even during the dehydration process. However, if the elastic body 19 is provided in the contact portion here, even if contact occurs, the vibration of the outer tub 2 can be attenuated by the deformation of the elastic body 19. Since the maximum amplitude of the outer tub 2 is generated when the outer tub 2 is in a resonance state, even if contact occurs, it is at the time of dehydration activation. At the time of steady dehydration, even if the vibration of the outer tub 2 increases, it does not increase so much that the swing restricting means 13 and the outer frame lower portion 18 come into contact with each other.

  As described in the first embodiment, it is effective to reduce the vibration when the outer tank 2 is attenuated at the time of dehydration activation. In the present invention, even if contact occurs, only at the time of dehydration activation. Therefore, the vibration performance can be further improved by configuring the washing machine as shown in the present embodiment.

(Embodiment 3)
FIG. 10 shows a contact portion between the swing restricting means 13 and the outer frame lower portion 18 in the third embodiment of the present invention. In the present embodiment, in the washing machine according to the first and second embodiments, the restriction that restricts the swing of the swing restricting means 13 on the outer frame lower part 18 side of the contact portion between the outer frame lower part 18 and the swing restricting means 13. Means 50 are provided. As shown in FIG. 10A, the restricting means 50 may be provided so as to be a wall that surrounds the rocking restricting means 13, or as shown in FIG. A swing restricting means 13 may be provided so as to swing within the hollow portion. By doing so, the swing restricting means 13 cannot swing beyond the limit.

  The limiting width of the limiting means 50 is adjusted and provided so that the outer tub 2 does not collide with the outer frame 2. If the limiting width of the limiting means 50 is set too small, the swing restricting means 13 hits the limiting means 50 until the shaking of the outer tub 2 is small, and noise is generated at that time. That is, the limiting means 30 of the present embodiment is for preventing the outer tub 2 from colliding with the outer frame 1 when the outer tub 2 swings more than expected.

(Embodiment 4)
The block diagram of the washing machine in the 4th Embodiment of this invention is shown in FIG. In the present embodiment, as shown in FIG. 11, two swing restricting means 13 are provided in the left-right direction. The two swing restricting means 13 are provided as far as possible so as to be equidistant from each other with a center line passing through the center of gravity of the drum 5. Thus, by providing a plurality of swing restricting means 13 in the left-right direction, the stability of supporting the outer tub 2 is improved.

  This will be described with reference to the vibration model diagram of FIG. Here, the outer tub 2 will be described as a vibrating body 40 and the swing regulating means 13 will be described as a supporting body 41. FIG. 11 shows a state in which the vibrating body 40 is supported by two support bodies 41 from below. The two support bodies 41 are provided so as to be equidistant distances W across a center line passing through the center of gravity of the vibrating body 40. When the vibrating body 40 tries to vibrate in the left-right direction, a force F acts on the vibrating body 40. Due to this force F, a moment R that causes the vibrating body 40 to fall is generated in the vibrating body 40. At this time, a drag force f is exerted in the vertical direction through the support body 41, and a moment r is generated by the drag force f, which acts as a force against the moment R and prevents the vibrating body 40 from falling.

  In order to prevent the vibrating body 40 from falling down, it is necessary to always maintain the relationship of R <r, and the greater the difference between R and r, the higher the stability. Here, the moments R and r can be expressed by the following equations, respectively.

R = F × L
r = f × W
From this equation, it can be said that the greater the W, the higher the stability.

  This is the reason why the stability of supporting the outer tub 2 is improved in the present embodiment. Moreover, since the frictional force and the damping force at the contact portion with the outer frame lower portion 18 are increased by providing a plurality of the rocking restricting means 13, the rocking of the outer tub 2 can be further reduced. The increase in damping force will be described. When the elastic body 19 is used in the swing restricting means 13 as shown in the second embodiment, the force f in the vibration model diagram of FIG. In addition, since the damping force due to the deformation of the elastic body 19 is also generated, the force f increases accordingly, and the moment due to the damping force is also added to the moment r, which reduces the vibration in the left-right direction. It is thought that it becomes.

(Embodiment 5)
The block diagram of the rocking | fluctuation control means 13 in the 5th Embodiment of this invention is shown in FIG. In the present embodiment, the length in the left-right direction of one end of the swing restricting means 13 on the side in contact with the outer frame lower portion 18 is made longer than the length in the front-rear direction. Here, the case where the elastic body 19 is attached to the tip of the rod-shaped body 14 shown in the second embodiment will be described.

  The effect of this will be described with reference to the front view of the swing restricting means 13 shown in FIG. As described in the above-described embodiment, due to the vibration in the left-right direction of the outer tub 2, a moment as indicated by R in FIG. work. The elastic body 19 is deformed by the moment R, and the elastic body 19 generates a damping force f by the deformation, and further generates a damping moment r. The damping moment r increases as the distance W from the center to the end of the elastic body 19 increases. Here, in consideration of the fact that the vibration of the outer tub 2 has a large component in the left-right direction in the washing process, the damping moment with respect to the moment R is increased by increasing the length of the elastic body 19 in the left-right direction. It is considered that the vibration in the left-right direction of the outer tub 2 can be reduced more effectively.

  In this case, the moment r also becomes a reaction force moment that prevents the outer tub 2 from falling down, so that the stability of supporting the outer tub 2 so as not to fall down can be further improved.

(Embodiment 6)
The block diagram of the washing machine in the 6th Embodiment of this invention is shown in FIG. In the present embodiment, as shown in FIG. 15, two swing restricting means 13 are provided in the front-rear direction of the outer tub 2. The front-side swing restricting means 13a is as far forward as possible and the rear-side swing restricting means 13b is as far back as possible in the empty space below the outer tub 2 so as not to hit the control means 12. Provided below the driving means 6.

  When considering the shaking of the outer tub 2, the manner of vibration differs between the front side and the rear side of the outer tub 2, even if the shaking is in the horizontal direction. As for the difference, one is the unevenness of clothing. If the clothing 20 is biased from the rear side, the rear side swing will increase, and if it is biased from the front side, the front side swing will increase. The other is due to the position of the elastic support means 3. Since the elastic support means 3 is usually configured to support right below the position of the center of gravity of the outer tub 2, it is relatively close to the rear side of the outer tub 2. Therefore, the shaking of the outer tub 2 is more likely to swing on the front side than on the rear side. In consideration of this, the swing restricting means 13 is arranged on the front side of the outer tub 2 in the previous embodiment. However, depending on how the clothes 20 are biased, the rear side shaking of the outer tub 2 may become considerably large. Therefore, by providing the front swing control means and the rear swing control means 13b, Both shaking of the front side and the rear side of the tank 2 can be reduced.

  As described above, since the washing machine according to the present invention does not use heavy objects for the weight attached to the outer tub, the durability of the support system and the like can be maintained, and the vibration-proof performance can be quietly improved. It is useful for such applications.

Sectional drawing of the washing machine in Embodiment 1 of this invention Front view of the washing machine The block diagram of the elastic support means in Embodiment 1 of this invention Configuration diagram of the rocking restricting means in Embodiment 1 of the present invention Sectional drawing of a washing machine when water enters into the drum in Embodiment 1 of the present invention The figure which shows the vibration of the outer tank in the dehydration operation in Embodiment 1 of this invention The figure which shows the difference of the vibration of an outer tank by the difference in the rigidity of the support system in Embodiment 1 of this invention Configuration diagram of washing machine in Embodiment 2 of the present invention Configuration diagram of rocking restricting means in Embodiment 2 of the present invention The figure which shows the contact part of the rocking | fluctuation control means and outer frame lower part in Embodiment 3 of this invention. Configuration diagram of washing machine in Embodiment 4 of the present invention Vibration model diagram according to Embodiment 4 of the present invention Configuration diagram of swing restricting means in Embodiment 5 of the present invention The figure which shows the force which acts on the rocking | fluctuation control means in Embodiment 5 of this invention. Configuration diagram of washing machine in Embodiment 6 of the present invention Cross section of a conventional washing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer frame 2 Outer tank 3 Elastic support means 4 Upper support means 5 Drum 5a Opening part 6 Drive motor 8 Bellows 13 Oscillation control means 14 Rod body 18 Outer frame lower part 19 Elastic body 50 Limiting means

Claims (6)

An outer frame, an outer tub elastically supported in the outer frame, a cylindrical drum provided with an opening on the front side so as to be rotatable in the outer tub, and a drive motor for rotationally driving the drum An elastic support means for supporting the outer tub and suppressing vibrations, and a swing restricting means provided at a lower portion of the outer tub, wherein the swing restricting means has one end of a rod-shaped body at a lower portion of the outer tub. A washing machine that is attached to the garment so that when clothes and water enter the drum during washing and the outer tub is displaced downward, the other end of the rod-shaped body comes into contact with the lower part of the outer frame. The washing machine according to claim 1, wherein an elastic body is provided on at least one of the other end of the rod-like body and the lower portion of the outer frame. The washing machine according to claim 1 or 2, wherein limiting means for limiting swinging of the rod-like body is provided at a lower portion of the outer frame. The washing machine according to any one of claims 1 to 3, wherein a plurality of swing restricting means are provided in a lateral direction of the outer tub. The washing machine according to any one of claims 1 to 4, wherein the other end of the rod-like body is longer in the left-right direction than in the front-rear direction. The washing machine according to any one of claims 1 to 5, wherein a plurality of swing regulating means are provided in the front-rear direction of the outer tub.