JP4387812B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine having a rotating tub that rotates about a horizontal axis.

  The drum type washing machine includes a rotating tub that rotates about a substantially horizontal horizontal axis and a water tub that accommodates the rotating tub, and a plurality of baffles for lifting laundry on the inner surface of the peripheral wall portion of the rotating tub. Is provided. In the washing and rinsing step, the laundry is lifted and dropped by rotating the rotating tub with the water stored in the water tub and the laundry stored in the rotating tub. Thereby, the laundry is beaten. In the dewatering step, the rotating tub is rotated at a low speed to remove moisture contained in the laundry to some extent, and then the laundry is centrifugally dehydrated by gradually increasing the rotating speed of the rotating tub to the maximum speed.

  However, in a drum-type washing machine, if the laundry is placed at the start of the washing operation, for example, because the laundry is thrown into the rotating tub, the offset state is difficult to be resolved even if the washing process proceeds. There is a circumstance. If there is an imbalance in the vicinity of both ends in the axial direction in the rotating tank, a large vibration is generated during the dehydration process. For this reason, in conventional drum-type washing machines, a liquid balancer is provided in order to suppress the occurrence of large vibrations and noise due to unbalance, and the rotating tub is adjusted at low speed at the beginning of the dehydration process to correct unbalance. It is rotating backwards. However, the above-described method has a problem that vibration and noise cannot be sufficiently suppressed in a large drum type washing machine having a large washing capacity.

In contrast, in a drum-type washing machine having a rotating tub inclined upward, an auxiliary baffle is provided on the rear end plate of the rotating tub in addition to the baffle in order to suppress deterioration in cleaning performance due to imbalance. A configuration is proposed. When the rotating tub is tilted forward, the laundry tends to be shifted to the back. According to the said structure, since the laundry which deviates and exists in the inner part in a rotation tank can fully be stirred, generation | occurrence | production of washing nonuniformity can be suppressed.
JP 2002-315985

That is, the above-described auxiliary baffle is provided for the purpose of stirring the laundry in the inner part of the rotating tub, which cannot be stirred by the conventional baffle. Therefore, since the washing operation is continued without eliminating the state where the laundry is offset in the inner part of the rotating tub, there is a problem that large vibrations and noises are easily generated during the dehydration process.
This invention is made | formed in view of the said situation, The objective is to provide the drum type washing machine which can reduce generation | occurrence | production of the vibration and noise at the time of a spin-drying | dehydration process.

The drum-type washing machine of the present invention is provided with a water tub, a rotary tub provided in the water tub so as to be rotated about a horizontal axis, and a elastic tub that elastically supports the water tub. A supporting means; a main baffle provided on the inner surface of the peripheral wall portion of the rotating tub so as to lift the laundry as the rotating tub rotates; and an axis of the rotating tub provided on the inner surface of the peripheral wall portion of the rotating tub A first baffle extending along the direction and an auxiliary baffle composed of a second baffle , wherein the first baffle is adjacent to one of the end plates in the axial direction of the rotating tub and the other The second baffle is provided so as to be close to the other end plate of the two axial end plates of the rotating tub and to be separated from the one end plate, The first baffle and the second baffle are The laundry is disposed opposite to the axial direction of the rotating tub and is tapered from the adjacent end plate side toward the axial center of the peripheral wall portion of the rotating tub, and the laundry as the rotating tub rotates. Is moved to the vicinity of the center in the axial direction of the rotary tank .

  According to the drum type washing machine of the present invention, when the rotating tub is rotated during the washing operation, the laundry located at both axial ends of the rotating tub moves to the vicinity of the center in the rotating tub by the action of the auxiliary baffle. For this reason, unbalance is prevented from occurring at both axial ends of the rotating tank during the dehydration process. Therefore, it is possible to prevent a large vibration from occurring during the dehydration process.

Hereinafter, an embodiment in which the present invention is applied to a top open type drum type washing machine will be described with reference to the drawings. First, the overall configuration of the washing machine according to the present embodiment will be described. As shown in FIGS. 1 and 2, the drum type washing machine 1 includes a base plate 2, an outer box 3 fixed on the base plate 2, and a top cover 5 mounted on the outer box 3 and having a laundry entrance 4. It is composed of The outer box 3 includes an outer box main body 6 and a front plate 7. The top cover 5 is provided with an outer lid 8 that opens and closes the laundry entrance 4. The outer cover 8 is configured to clamshell type consisting of a rear lid 8 b and the front lid 8a. An operation panel 9 is provided on the right front portion of the top cover 5.

  Inside the outer box 3, a substantially cylindrical water tank 10 is elastically supported via a plurality of suspensions 11 (corresponding to elastic support means). The suspension 11 includes a damper 11a and a suspension spring 11b. An opening 13 that is opened and closed by an inner lid 12 is formed in the upper part of the water tank 10. When the opening 13 is closed by the inner lid 12, the space between the inner lid 12 and the opening 13 is sealed in a watertight manner.

  A cylindrical rotary tank 14 is rotatably supported in the water tank 10. The diameter of the rotary tank 14 is set to about 520 mm, and the length in the axial direction is set to about 400 mm. The rotating tub 14 functions as a washing tub, a dewatering tub, and a drying tub, and a plurality of small holes (not shown) are provided on the peripheral wall portion. The left and right end plates of the rotating tank 14 are provided with tank shafts 15 (shown only in FIG. 5) extending in a substantially horizontal direction. These tank shafts 15 are bearings (not shown) provided on the left and right end plates of the water tank 10. ) Is rotatably supported. The tank shaft 15 extends in a substantially horizontal direction. The left end plate of the water tank 10 is provided with a motor (not shown), and the rotating shaft of the motor is connected to the end of the tank shaft 15 supported by the left end plate of the water tank 10. That is, the rotary tank 14 is directly driven to rotate by the motor. A point indicated by “O” in FIG. 2 indicates the center of the tank shaft 15 (that is, the rotation center axis of the rotating tank 14).

  An opening 17 (see FIG. 3) that is opened and closed by a drum lid 16 is provided on the peripheral wall of the rotating tub 14. The drum lid 16 includes a lid main plate 18 that rotates about a rotation fulcrum 18a in FIG. 2 and an auxiliary plate 19 that rotates about a rotation fulcrum 19a. The lid main plate 18 and the auxiliary plate 19 are opened and closed in conjunction with each other by an interlocking mechanism (not shown). When the drum lid 16 is in the closed state (the state shown in FIG. 2), the lid main plate is placed on the front end of the auxiliary plate 19. It is comprised so that the front-end | tip part of 18 may overlap. The closed state of the drum lid 16 is held by a locking means (not shown). The opening 17 is configured to face the opening 13 of the water tank 10 when the rotating tank 14 is stopped.

  As shown in FIGS. 2 and 3, a plurality of, for example, three main baffles 20 to 22 having a substantially triangular cross section are provided on the inner surface of the peripheral wall portion of the rotating tub 14. The three main baffles 20 to 22 are arranged at substantially equal intervals, and the two main baffles 20 and 21 arranged on both sides of the opening 17 across the opening 17 have a length thereof. The dimension is set to about 230 mm. Further, the length dimension of one main baffle 22 disposed at a portion facing the opening 17 across the rotation center of the rotating tub 14 is set to about 320 mm. Moreover, the height dimension (diameter direction dimension of the rotary tank 14) of the three main baffles 20-22 is all set to about 30 mm. The main baffles 20 to 22 are all arranged close to the axial center of the peripheral wall portion so as to be separated from both end plates of the rotating tub 14 by substantially the same distance. Although not shown, a counterweight for balancing the drum lid 16 is accommodated inside the main baffle 22 having a large length.

  As shown in FIGS. 2 to 4, the auxiliary baffle 23 (the first baffle 23) between the main baffle 20 and the main baffle 22 and between the main baffle 21 and the main baffle 22 in the inner surface of the peripheral wall portion of the rotating tub 14. 1 and 2 baffles) are provided in pairs. Each pair of auxiliary baffles 23 is disposed at both left and right end portions of the inner surface of the peripheral wall portion so as to face each other in the axial direction of the rotating tub 14. Each auxiliary baffle 23 is in contact with the left end plate or the right end plate of the rotating tub 14, and is fixed to the peripheral wall portion with screws. The auxiliary baffle 23 has a substantially triangular pyramid shape that tapers from the end plate toward the center in the axial direction of the peripheral wall portion, and has a width that inclines toward the peripheral wall portion from one end plate toward the other end plate. It has a narrow inclined surface 23a, and a triangular inclined surface 23b inclined from the inclined surface 23a toward both sides in the circumferential direction toward the peripheral wall portion.

In the present embodiment, the height dimension of the portion of the auxiliary baffle 23 that contacts the end plate (the length dimension in the radial direction of the rotating tub 14, indicated by H1 in FIG. 4) is set to about 65 mm. The axial length dimension (the length dimension indicated by H2 in FIG. 4) of the peripheral wall portion of the auxiliary baffle 23 is set to about 100 mm.
Further, an opening (not shown) is formed between the auxiliary baffle 23 and the main baffle 22 in the inner surface of the peripheral wall portion of the rotating tub 14. The opening is for collecting the laundry that has entered between the rotating tub 14 and the water tub 10, and is closed by a cover 25.

Although not shown in detail, in the outer box 3, a water supply device for supplying water into the water tank 10, a drainage device for discharging water in the water tank 10, and air in the rotating tank 14 are dehumidified. A drying device or the like that dries the laundry by warming it and returning it to the inside of the rotating tub 14 is provided.
In this embodiment, the center of gravity of the vibration system including the water tank 10, the rotating tank 14, and the motor that applies a load to the suspension 11 among the members constituting the drum type washing machine 1 is the axial center of the rotating tank 14. Configured to be located.

  Next, the operation of the above configuration will be described. The drum type washing machine 1 is generally controlled by a control microcomputer (not shown) housed in the outer box 3. When the laundry is stored in the rotating tub and an instruction to start operation is given, the control microcomputer executes each process according to the set operation course. For example, when a standard driving course washing operation is started, the control microcomputer sequentially executes a washing process, a rinsing process, a dehydrating process, and a drying process.

  Specifically, in the washing process and the rinsing process, the control microcomputer drives the water supply device to drive the motor in a state where the washing water is supplied to the predetermined water level in the water tank 10, and the rotating tank 14 is moved in the forward and reverse directions. Rotate at low speed. The control microcomputer controls the motor so that the opening 17 faces the opening 13 of the water tank 10 when the rotary tank 14 is stopped. When the rotating tub 14 is rotated forward and backward at a low speed, the laundry accommodated in the rotating tub 14 is lifted by the main baffles 20 to 22 together with the water in the water tub 10, and then dropped. Wash, rinse. In this case, since the laundry contains moisture and is heavy, the action of lifting the laundry of the triangular pyramid-shaped auxiliary baffle 23 is smaller than that of the main baffles 20 to 22, but the auxiliary baffle 23 causes the shaft of the rotating tub 14 to be lifted. The laundry located at both ends in the direction can be moved to the vicinity of the main baffles 20-22. Moreover, since the mechanical force is provided with respect to the laundry when the laundry located in the axial direction both ends of the rotating tub 14 and the auxiliary baffle 23 are in contact with each other, the cleaning performance is improved.

  In the dehydration process, the control microcomputer drives the drainage device to discharge the water in the water tank 10 and then drives the motor to rotate the rotary tank 14 in one direction at a low speed of about 40 rpm. Laundry that contains a large amount of water and is heavy at the end of drainage is located in the lower part of the rotating tub 14. Therefore, when the rotating tub 14 is rotated at a low speed, the laundry is lifted by the main baffles 20 to 22 and then dropped. Thereby, the moisture contained in the laundry is removed to some extent.

Subsequently, the control microcomputer drives the motor to rotate the rotating tank 14 in one direction at a rotation speed of about 60 to 80 rpm. At this time, the laundry in the rotating tub 14 is moved in the rotating tub 14 by the main baffles 20 to 22 and the auxiliary baffle 23 and is uniformly attached to the entire peripheral wall portion.
That is, the laundry located near the center in the axial direction in the rotating tub 14 is lifted by the main baffles 20 to 22, but depending on the magnitude of the centrifugal force acting on the laundry, the laundry sticks to the peripheral wall portion and falls. Divided into

As shown in FIG. 5, the centrifugal force F acting on the laundry S in the rotating tub 14 is represented by r representing the distance from the rotation center axis O of the rotating tub 14 to the center of gravity of the laundry S, and m representing the mass of the laundry S. If the rotational angular velocity is ω, the following is defined.
F = m · r · ω ² (1)
As shown in the above formula (1), the centrifugal force F is proportional to the distance r. For example, as shown in FIG. 6, when there are a large number of laundry S in the rotary tub 14, the laundry S1 located on the outer peripheral portion and the laundry S2 located on the inner peripheral portion are r1, As indicated by r2, the distance from the rotation center O of the rotary tank 14 is different (r1> r2). Accordingly, the centrifugal force acting on the laundry S1 is larger than the centrifugal force acting on the laundry S2. For this reason, among the laundry lifted by the main baffles 20 to 22, the laundry positioned at the outer peripheral portion sticks to the peripheral wall portion without falling, and the laundry positioned at the inner peripheral portion falls. As a result, the laundry in the rotating tub 14 is gradually dispersed and sticks uniformly to the entire peripheral wall portion.

  On the other hand, the laundry located on both sides in the axial direction of the rotating tub 14 is lifted by the auxiliary baffle 23 because the moisture is removed and lightened. At this time, since the auxiliary baffle 23 has a triangular pyramid shape, the laundry is placed near the axial center of the rotating tub 14 by the inclined surface 23a, and the axial center of the rotating tub 14 from both circumferential sides of the auxiliary baffle 23 by the inclined surface 23b. Moved to nearby. As a result, the laundry is collected near the center of the rotating tub 14 in the axial direction. The laundry collected near the center in the axial direction of the rotating tub sticks evenly to the inner surface of the peripheral wall portion of the rotating tub 14 by the action of the main baffles 20 to 22 described above.

In this way, the laundry in the rotating tub 14 is gradually dispersed over the entire inner surface of the peripheral wall portion, and unbalance is reduced. By the above-described operation, the amount of laundry present near the center in the axial direction of the rotating tub 14 is greater than the amount of laundry present near both ends (near the end plates).
When the control microcomputer determines that the laundry has evenly adhered to the peripheral wall portion of the rotating tub 14, the control microcomputer drives the motor to increase the rotation speed of the rotating tub 14 to about 100 rpm. Note that whether or not the laundry has evenly adhered to the peripheral wall portion of the rotating tub is determined, for example, by detecting fluctuations in the rotational speed of the motor (that is, uneven rotation) during one rotation of the rotating tub. This rotational speed (100 rpm) is set to a rotational speed at which the centrifugal force applied to all the laundry in the rotating tub 14 exceeds the gravitational acceleration. Accordingly, here, the rotating tub 14 rotates with all the laundry in the rotating tub 14 stuck to the peripheral wall portion.

  Thereafter, the control microcomputer drives the motor to raise the rotating tank to a maximum speed of 900 to 1200 rpm. As a result, the laundry rotates together with the rotating tub 14 while being stuck to the inner surface of the peripheral wall portion, and is centrifugally dehydrated. Note that the control microcomputer reduces the rotation speed and causes the laundry in the rotation tank 14 when a large vibration occurs at a plurality of resonance points that appear while the rotation speed of the rotation tank 14 is increased from 100 rpm to the maximum speed. Is moved to correct the unbalance causing resonance vibration. And after correcting imbalance, the rotational speed of the rotary tank 14 is raised again to the maximum speed.

  Here, vibration generated during dehydration will be described with reference to FIG. The magnitude of vibration generated during dehydration is determined by the excitation force. The magnitude of the excitation force is determined by the centrifugal force applied to the laundry S and the moment of inertia around the center of gravity acting on the laundry S. The moment of inertia M is defined as follows, where G is a surface passing through the center of gravity of the vibration system and orthogonal to the rotation center axis O, and L is the distance from the surface G to the center of gravity of the laundry S.

M = F · L = m · r · ω ² · L (2)
As described above, F is a centrifugal force acting on the laundry. As shown in the above equation (2), the moment of inertia M is proportional to the distance r and the distance L. As described above, the centrifugal force F is proportional to the distance r. Therefore, the vibration caused by the unbalance existing in the vicinity of the axial center of the rotating tub 14 is smaller than the vibration caused by the unbalance existing at both axial ends in the rotating tub 14.

In this embodiment, since the laundry is brought near the center of the rotating tub 14 in the axial direction, an imbalance exists near the center of the rotating tub 14 in the axial direction, that is, near the center of gravity of the vibration system. Therefore, the vibration generated during the dehydration process can be reduced as compared with the conventional drum type washing machine in which the unbalance is generated at the axial end portion of the rotating tub.
In the drying process, the control microcomputer drives the motor to rotate the rotating tank 14 at a low speed in the forward and reverse directions and drives the drying device. Thereby, the warm-aired air is supplied into the rotating tub 14 and the moisture contained in the laundry is taken away. Further, the air deprived of moisture is dehumidified and warmed, and then returned to the rotary tank 14 again. The laundry in the rotating tub 14 is dried by such air circulation.

  Further, when the rotating tub 14 is rotated at a low speed in the forward and reverse directions, the laundry in the rotating tub 14 is lifted by the main baffles 20 to 22 and spreads in the rotating tub 14 by the warm air flowing through the rotating tub 14. Fall. Further, the auxiliary baffle 23 moves the laundry that has spread and dropped into the rotating tub 14 to the vicinity of the center in the axial direction of the rotating tub 14. That is, the laundry in the rotating tub 14 moves in the rotating tub 14 while being dispersed or concentrated. For this reason, the warm air which circulates through the inside of the rotating tub 14 and the laundry efficiently contact each other, and the drying efficiency is improved.

Furthermore, according to the experiment by the inventors, it is found that the laundry is agitated by the main baffles 20 to 22 and the auxiliary baffle 23, so that the laundry is less likely to be twisted or entangled at the end of drying. It was.
FIG. 7 shows the drying of a drum-type washing machine (indicated by P in FIG. 7) having main baffles 20-22 and auxiliary baffle 23 and a drum-type washing machine having only main baffles 20-22 (indicated by Q in FIG. 7). It is the bar graph which compared the fabric entanglement rate at the time of completion | finish. In FIG. 7, the horizontal axis indicates the amount of laundry, and the vertical axis indicates the fabric entanglement rate.

The fabric tangling rate T (%) indicates that the laundry (made of exposed cotton cloth) before and after the washing operation is taken out from the rotating tub 14 one by one in accordance with the rhythm of the metronome. If the average time required for extraction is T0 (seconds) and T1 (seconds), respectively, it can be obtained from the following equation.
T = {(T1-T0) / T0} × 100
As apparent from FIG. 7, the drum-type washing machine having the auxiliary baffle 23 has a lower fabric entanglement rate than the drum-type washing machine having no auxiliary baffle 23.

  Thus, according to the present embodiment, by providing the auxiliary baffle 23 in the rotating tub 14, the laundry in the rotating tub 14 can be moved near the axial center, in other words, near the center of gravity of the vibration system during the dehydration process. it can. For this reason, generation | occurrence | production of the vibration and noise at the time of a spin-drying | dehydration process can be suppressed. Moreover, since the laundry located at both axial ends of the rotating tub 14 can be efficiently moved to the vicinity of the center in the axial direction by the auxiliary baffle 23, the operation time for unbalance correction can be shortened.

  Further, in the drying process, the laundry is moved in the rotating tub 14 while being repeatedly dispersed and concentrated by the cooperation of the main baffles 20 to 22 and the auxiliary baffle 23. In particular, in this embodiment, since the auxiliary baffle 23 is provided so as to be separated from the main baffles 20 to 22, the main baffles 20 to 22 and the auxiliary baffle 23 can efficiently move the laundry. For this reason, it is possible to improve the drying efficiency and reduce the tangling of the laundry. According to the experiments by the inventors, it was found that the amount of wrinkles generated in the laundry at the end of drying is smaller when the washing operation is performed using the drum type washing machine having the auxiliary baffle 23. . This is also clear from the fact that the fabric entanglement rate during the drying process is small, and according to the above configuration, there is also an effect that the laundry can be finished in a good state.

  FIG. 8 shows the results of experiments conducted by the inventors on the difference in the amplitude of vibration generated during dehydration depending on the presence / absence of the auxiliary baffle 23 and the size of the auxiliary baffle 23. In FIG. 8, the horizontal axis represents the amount of laundry (kg), and the vertical axis represents the amplitude of vibration (mm). Moreover, in FIG. 8, the broken line P1-P4 has shown the drum type washing machine which has the main baffles 20-22 and the auxiliary baffle 23, and the broken line Q has shown the drum type washing which has only the main baffles 20-22. Furthermore, the combinations of the axial length dimension and the height dimension of the auxiliary baffle 23 of the drum type washing machine corresponding to the polygonal lines P1 to P4 are (60 mm, 40 mm), (60 mm, 65 mm), (100 mm, 40 mm), respectively. (100 mm, 65 mm).

  As is apparent from FIG. 8, the drum type washing machine having the main baffles 20 to 22 and the auxiliary baffle 23 has a smaller amplitude of vibration generated during dehydration than the drum type washing machine having only the main baffles 20 to 22. . In the drum type washing machine having the auxiliary baffle 23, the amplitude of the drum type washing machine indicated by the broken line P4, that is, the drum type washing machine having the auxiliary baffle 23 according to the present embodiment is the smallest. In other words, in this embodiment, the shape of the auxiliary baffle 23 is set to the above-described dimensions, so that a very high vibration reduction effect can be obtained.

In addition, this invention is not limited to the said Example, The following deformation | transformation is possible.
The height dimension and the axial length dimension of the auxiliary baffle 23 are not limited to the above-described embodiments. FIG. 9 and FIG. 10 are based on the experimental results of FIG. 8 in order to investigate the difference in vibration amplitude due to the difference in height dimension of the auxiliary baffle 23 and the difference in vibration amplitude due to the difference in the axial length dimension of the auxiliary baffle 23. It was created.

  That is, FIG. 9 is created based on the experimental results (corresponding to the polygonal lines P1 and P2 in FIG. 8) of the drum type washing machine having the auxiliary baffle 23 having an axial length of 60 mm, and the horizontal axis is the auxiliary baffle 23 The vertical dimension indicates the amount of reduction (mm) with respect to the amplitude of a drum type washing machine (corresponding to the polygonal line Q in FIG. 8) having no auxiliary baffle. FIG. 10 is created based on the experimental results (corresponding to the polygonal lines P1 and P3 in FIG. 8) of the drum type washing machine having the auxiliary baffle 23 having a height of 40 mm, and the horizontal axis is the axis of the auxiliary baffle 23. In the direction length dimension (mm), the vertical axis represents the reduction amount (mm) with respect to the amplitude of the drum type washing machine having no auxiliary baffle. Furthermore, the broken lines K1 to K4 in FIGS. 9 and 10 are created based on data when the amount of laundry is 1 kg, 3 kg, 5 kg, and 8 kg.

  As is apparent from FIGS. 9 and 10, the vibration reduction amount increases as the height dimension of the auxiliary baffle 23 increases and the axial length dimension increases. However, in general, considering that the vibration amplitude generated during the dehydration process has a variation of about 0.5 mm, the vibration reduction effect is significant when the vibration reduction amount exceeds 0.5 mm. . Then, if the vibration reduction effect is large when the vibration reduction amount is 0.5 mm or more in at least two types of the four types of laundry, the shape of the auxiliary baffle 23 has a height dimension of about 30 mm or more, and the axial length dimension is about 50 mm or more.

The height dimension of the auxiliary baffle 23 affects the action of lifting the laundry, and is related to the thickness dimension of the laundry. Therefore, since the general thickness dimension of the laundry is about 30 mm, the height dimension of the auxiliary baffle 23 is preferably 30 mm or more.
The axial length dimension of the auxiliary baffle 23 affects the action of moving the laundry located at the axial end of the rotating tub 14 to the vicinity of the center of gravity of the vibration system. This is related to the size and the distance from the end of the rotating tank 14 to the center of gravity of the vibration system. In the above embodiment, the axial length of the rotating tank 14 is 400 mm, and the distance from the end plate of the rotating tank to the center of gravity is 200 mm. Therefore, the axial length of the auxiliary baffle 23 that can provide a significant vibration reduction effect. The dimensions are preferably at least one-eighth of the axial length of the rotating tank 14 and at least one-fourth of the distance from the end plate to the center of gravity. However, it is necessary to arrange the auxiliary baffle 23 in the region from the end plate of the rotating tub to the surface G (see FIG. 5) on the inner surface of the peripheral wall portion.

Further, the auxiliary baffles provided on both sides in the axial direction of the rotating tub may not be opposed to each other. Furthermore, the auxiliary baffle may be provided on the peripheral wall portion so as to be close to the end plate of the rotating tub, and may not be in contact with the end plate .
In a drum-type washing machine in which the rotation center axis of the rotating tub is inclined forward, the laundry in the rotating tub tends to be shifted to the back (rear part), so the rear is only at the rear of the peripheral wall of the rotating tub. An auxiliary baffle close to the end plate may be provided.

  In a drum type washing machine in which the center of gravity of the vibration system is shifted from the axial center of the rotating tub, it is preferable that the axial length dimensions of the pair of auxiliary baffles facing in the axial direction are different. That is, when the center of gravity is located on one side of the axial center of the rotating tub, the auxiliary baffle disposed on one side in the axial direction of the peripheral wall portion is longer in the axial direction than the auxiliary baffle disposed on the other side. Should be smaller. However, each auxiliary baffle needs to be arranged in a region between the face G passing through the center of gravity and the end plate.

You may form an auxiliary baffle by press-molding the surrounding wall part or end plate of a rotary tank. According to the said structure, an auxiliary | assistant baffle and a rotation tank can be comprised integrally, and an assembly process can be decreased.
The auxiliary baffle is not limited to a triangular pyramid shape, and may be, for example, a semiconical shape.
The present invention can also be applied to a drum-type washing machine having a laundry entrance on the front surface.

1 is an external perspective view showing the overall configuration of a drum-type washing machine showing an embodiment of the present invention. Longitudinal side view of drum-type washing machine A perspective view of a rotating tub with the drum lid omitted. Enlarged perspective view of the auxiliary baffle The figure for demonstrating the difference of the centrifugal force concerning the laundry located in the outer peripheral part in a rotation tank, and the centrifugal force concerning the laundry located in an inner peripheral part Diagram for explaining the magnitude of the centrifugal force applied to the laundry and the moment of inertia around the center of gravity The figure which shows the difference of the fabric entanglement rate at the time of the end of drying with the presence or absence of the auxiliary baffle The figure which shows the difference of the vibration which occurs at the time of the dehydration process by the presence or absence of the auxiliary baffle and the size of the auxiliary baffle The figure for demonstrating the difference in the vibration amplitude by the difference in the height dimension of the auxiliary baffle 23 The figure for demonstrating the difference in the vibration amplitude by the difference in the axial direction length dimension of the auxiliary baffle 23

Explanation of symbols

In the drawings, 1 is a drum-type washing machine, 10 is a water tank, 11 is a suspension (elastic support means), 14 is a rotating tank, 15 is a tank shaft, 20 to 22 are main baffles, 23 is an auxiliary baffle, and 23a and 23b are inclined. Show the surface.

Claims (5)

A tank,
A rotating tub provided to be driven to rotate around a horizontal axis in the water tub, in which laundry is accommodated ,
Elastic support means for elastically supporting the water tank;
A main baffle provided on the inner surface of the peripheral wall of the rotating tub so as to lift the laundry along with the rotation of the rotating tub;
Wherein provided on the peripheral wall inner surface of the rotating tub, and an auxiliary baffle comprises a first baffle and a second baffle extending along the axial direction of the rotating tub,
The first baffle is provided so as to be close to one end plate of the axial end plates of the rotating tub and to be separated from the other end plate,
The second baffle is provided so as to be close to the other end plate of the axial end plates of the rotating tub and to be separated from the one end plate,
The first baffle and the second baffle are arranged opposite to each other in the axial direction of the rotating tub and taper from the adjacent end plate side toward the vicinity of the axial center of the peripheral wall portion of the rotating tub. A drum-type washing machine having a shape and moving the laundry to the vicinity of the axial center of the rotating tub as the rotating tub rotates . The drum-type washing machine according to claim 1, wherein the rotating shaft of the rotating tub is constituted by an inclined shaft in which one end portion of both end portions is located slightly below the other end portion . 2. The second baffle is configured to be larger than the first baffle in a configuration in which the center of gravity of the vibration system is configured to deviate from the axial center of the rotating tank toward one end plate. 2. The drum type washing machine according to 2. The main baffle is provided close to the axial center of the inner surface of the peripheral wall portion of the rotating tub, and extends along the axial direction of the rotating tub.
The drum type washing machine according to any one of claims 1 to 3, wherein the auxiliary baffle and the main baffle are configured so that positions in the circumferential direction of the rotating tub are different . The drum type washing machine according to claim 4, wherein the auxiliary baffle and the main baffle are configured to be separated from each other in a circumferential direction of the rotating tub .

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