JP2015062507A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine which, even when clothes jump out of a drum, conveys the clothes which have jumped out back to the drum and prevents the clothes from being rubbed.SOLUTION: A drum type washing machine includes: a housing 1 for forming an outline; a bottomed cylindrical outer tub 23 elastically supported by the housing 1; a bottomed cylindrical drum 21 provided in the outer tub 23 in a rotatable manner; a motor 22 for rotationally driving the drum; and a bellows 26 for connecting the housing 1 and the outer tub 23. A jumping out prevention protrusion 31 which protrudes frontward from a front side end surface of the outer tub 23 is provided on an outer peripheral side of an outer tub opening part 23a for putting in clothes and on an inner peripheral side of a bellows fixing part 23g for fixing the bellows to the outer tub side.

Description

  The present invention relates to a drum type washing machine and a drum type washing and drying machine.

  The drum-type washing machine has a drum opening, an opening in the outer tub, and an opening in the housing in communication with each other, and a bellows-like packing that connects the outer tub and the housing, and an opening in the housing. The door is sealed with water. The door protrudes toward the opening of the drum and prevents clothing from popping out of the opening of the drum. However, when the amount of clothing is large, a part of the clothing may jump out of the drum from the gap between the protruding portion of the door and the opening of the drum. If the dehydration process is performed as it is and the drum rotates at a high speed, the popped clothes may rub against the outer tub or packing of the non-rotating body.

  Therefore, as a conventional technique for preventing the clothes from jumping out, Patent Document 1 includes a clothes return plate protruding downwardly toward the inside of the washing tub and inside the open / close door under the entrance / exit. Therefore, when the clothes are washed in the washing tub, a rotational force is applied to the garment, and even if the garment tries to jump out from the opening edge of the washing tub toward the opening / closing door, the garment collides with the garment return plate and the garment return plate is inclined. It is described that it rises along the surface and is pushed back in the direction of the washing tub.

JP 2007-202741 A

  However, the technique disclosed in Patent Document 1 is provided with a clothing return plate on an open / close door (referred to as a door in the present specification), and a washing tub (referred to as a drum in the present specification) by the weight of the clothing. ) Sinks, the relative positional relationship between the garment return plate and the drum may change, so that the effect of returning the garment into the drum cannot be sufficiently obtained. In particular, when there is a bias in the distribution of clothing in the drum during dehydration, the outer tub vibrates, so not only the relative positional relationship between the clothing return plate and the drum changes, but also the clothing return plate and the outer tub. May collide. In addition, since the clothes that popped out stick to the opening and packing (referred to as bellows in this specification) of the outer tub by centrifugal force due to the rotation of the drum, if there is a gap between the clothing return plate and the outer tub, There is a possibility that the effect of returning the clothes back into the drum may not be sufficiently obtained.

  In order to solve the above-described problems, the present invention provides a casing that forms an outer shell, a bottomed cylindrical outer tank that is elastically supported by the casing, and a bottomed cylinder that is rotatably provided in the outer tank. In a drum-type washing machine having a shape drum, a motor that rotationally drives the drum, and a bellows that connects the casing and the outer tub, a protrusion preventing protrusion protruding forward from the front end surface of the outer tub The outer bellows fixing portion for fixing the bellows to the outer tub side is provided on the outer peripheral side of the outer tub opening to which clothing is put.

  According to the present invention, even when the clothing that jumps out of the drum sticks to the outer tub or the bellows due to the centrifugal force caused by the rotation of the drum, the clothing can be pulled back into the drum. Furthermore, since the pop-out preventing protrusion is provided on the outer tub side, the positional relationship between the pop-out preventing protrusion and the outer tub is always constant, and the clothes are pulled back into the drum regardless of the sinking or vibration of the outer tub. Can be obtained. In addition, since the pop-out preventing protrusion can be molded integrally with the outer tub, the structure is simplified.

It is a schematic diagram of the right side which shows the internal structure of a drum type washing machine. It is the front view of the outer tank seen from the front along the rotating shaft of a drum. It is right side sectional drawing which expands and shows the front side of an outer tank. It is a schematic diagram explaining the effect | action of a protrusion prevention protrusion. It is right side sectional drawing of an outer tank when an outer tank sinks down from the initial position with clothing weight. FIG. 6 is an enlarged view of the AA cross section and the pop-out preventing protrusion of FIG. 5. It is the front view of the outer tank seen from the front along the rotating shaft of a drum. FIG. 8 is an enlarged cross-sectional view of the BB cross section and the pop-out preventing protrusion of FIG. 7. It is the front view of the outer tank seen from the front along the rotating shaft of a drum. It is the front view of the outer tank seen from the front along the rotating shaft of a drum. It is the front view of the outer tank seen from the front along the rotating shaft of a drum. It is the front view of the outer tank seen from the front along the rotating shaft of a drum.

  Hereinafter, this embodiment will be described with reference to the drawings.

  In this embodiment, a drum type washing / drying machine 100 that performs from washing to drying will be described. FIG. 1 is a schematic diagram on the right side showing the internal structure of the drum-type washing and drying machine 100 in the present embodiment. As shown in FIG. 1, an insertion port 1a for putting clothes in and out is provided at substantially the center of a casing 1 constituting the outer shell. A door 2 is attached to the insertion port 1a so as to be opened and closed. The door 2 has a door protrusion 2a that protrudes from the front to the rear. An operation panel 3 in the upper center of the housing 1 is electrically connected to a control device 4 for sequentially controlling the operation, and performs setting of an operation course and display of an operation state.

  Inside the housing 1, an outer tub 23 for storing water is supported in a vibration-proof manner via a suspension 24 and an auxiliary spring 25, and includes a drum 21 for storing clothing. The drum 21 is formed in a substantially cylindrical shape having a back surface, and is rotatably attached via a shaft 22a. A motor 22 attached to the back surface of the outer tub 23 is connected to the shaft 22a, and the drum 21 rotates forward (clockwise when the washing / drying machine 100 is viewed from the front) and reverse rotation (washing / drying machine 100 front). Rotation driven in both directions (counterclockwise as viewed from the side). A plurality of lifters 21 b are provided on the inner peripheral wall of the drum 21. A cylindrical fluid balancer 21 c is provided at the front end of the drum 21. The rotation axis z ′ of the drum 21 shown in FIG. 1 is inclined horizontally or downward from the front to the back.

  The outer tub 23 is formed in a substantially cylindrical shape having a front surface and a back surface, and includes an outer tub opening 23a for putting clothes in and out. The outer tub opening 23a and the insertion port 1a of the housing 1 are connected by a bellows 26, which is an annular packing, and are water-sealed by closing the door 2. Further, the insertion port 1a of the housing 1, the opening 23a of the outer tub 23, and the opening 21a of the drum 21 are in communication, and by opening the door 2, clothes can be taken in and out of the drum 21. . The outer tub 23 can be divided into a side including the opening 23a and a side to which the motor 22 is attached.

  As shown in FIG. 1, a drain hose 13 is connected to the drain port 23d. The drain hose 13 has a drain valve 13a in the drain path, and drains the washing water in the outer tub 23 by opening the drain valve 13a. One end of the water supply hose 11 is connected to the outer tub 23 through the water supply valve 11a and the detergent container 12, and the water supply valve 11a is opened to supply washing water into the outer tub 23. Further, the housing 1 is provided with a drying unit 14 that performs dehumidification in the outer tub 23, and blows air from the vicinity of the opening 23 a of the outer tub 23 into the drum 21.

  The operation of the above configuration will be described. When the door 2 is opened, clothes are put into the drum 21 and a predetermined amount of detergent is put into the detergent container 12, and then the operation is started, a washing process is first executed. In the washing process, the water supplied through the water supply valve 11a enters the outer tub 23 together with the detergent through the detergent container 12 and the water supply hose 11. After this operation is executed for a predetermined time, a washing operation in which the drum 21 repeats normal rotation, stop, reverse rotation, and stop is executed for a predetermined time. At this time, the clothes housed in the drum 21 are lifted in the rotation direction by the lifter 21b provided on the inner peripheral wall of the drum 21, and the stirring operation of dropping from the raised height position is repeated. The washing action works and is washed.

  After performing this operation for a predetermined time, the washing process is terminated and the dehydration process is executed. In this dehydration step, the drain valve 13 a is first opened, and the water in the outer tub 23 is drained outside the machine via the drain hose 13. Next, the drum 21 is rotated in one direction (in the reverse direction in this embodiment), and after reaching a predetermined number of rotations (for example, 900 r / min), the drum 21 is rotated for a predetermined time, thereby dehydrating water contained in the clothes. .

  After performing this dehydration process for a predetermined time, the water supply valve 11a is opened and water is supplied, and the water passes through the detergent container 12 and the water supply hose 11 and is poured into the outer tub 23 to perform the rinsing process. In this rinsing step, as in the washing step described above, the forward rotation, pause, inversion, and pause operations are repeated, and the clothes are lifted in the rotational direction by the lifter 21b provided on the inner peripheral wall of the drum 21 and lifted. A rinsing operation in which the agitating operation of dropping from the height position is repeated for a predetermined time.

  Thereafter, the dehydration process and the rinsing process described above are repeated a predetermined number of times, and the process proceeds to the final dehydration process. The dehydration time in this final dehydration step is set longer than that in the above dehydration step. After performing this final dehydration step, a drying step is performed. In the drying process, while the air is blown into the outer tub 23 for a predetermined time by the drying unit 14, the normal rotation, pause, inversion, and pause operations are repeated in the same manner as the washing process described above, and the clothing is applied to the inner peripheral wall of the drum 21. A drying operation is repeated for a predetermined time in which the stirring operation is repeated for a predetermined time by being lifted in the rotational direction by the lifter 21b provided and dropping from the raised height position.

  FIG. 2 is a front view of the outer tub 23 as viewed from the front along the rotation axis z ′. In the vicinity of the outer tub opening 23a, there are provided a washing water supply port 23e which is a route for washing water and a hot air outlet 23f which is a route for warm air. Water and warm air are supplied into the outer tub 23. In addition, in order to ensure the path | route of wash water and warm air, as shown in FIG. 1, the protrusion amount is small on the upper side of the door protrusion part 2a of the door 2 compared with the lower side. Moreover, the bellows fixing | fixed part 23g for fixing the bellows 26 is formed in the outer peripheral side of the outer tank opening part 23a. The bellows fixing portion 23g is substantially circular when viewed from the front, and is substantially concentric with respect to the bellows 26. Here, of the front end face of the outer tub 23, a surface surrounded by the outer peripheral side of the outer tub opening 23 a and the inner peripheral side of the bellows fixing part 23 g in the vicinity of the outer tub opening 23 a is the outer tub front end face. 23h. The outer tank front end face 23h is provided with a protrusion protruding forward. This protrusion is hereinafter referred to as a protrusion prevention protrusion 31 and is provided so as to extend substantially concentrically with the outer tub opening 23a. This protrusion prevention protrusion 31 may be formed as a separate member from the outer tub 23, but by forming it integrally, it is possible to save time and trouble of assembly during manufacture and to prevent aged deterioration such as loosening of mounting screws. I can do it.

  FIG. 3 is a right side cross-sectional view of the front side of the outer tub 23. The bellows 26 has a bellows structure in order to prevent the deformation due to the sinking of the outer tub 23 and the vibration of the outer tub 23 from being transmitted to the housing 1. Due to this bellows structure, the gap between the bellows 26 and the outer tank front end face 23h is partially narrowed. Therefore, as shown in FIG. Even when 23 vibrates, it is possible to prevent the protrusion preventing protrusion 31 from coming into contact with the bellows 26. In addition, when the bellows fixing part 23g is eccentric with respect to the outer tub opening 23a, the distance between the protrusion prevention protrusion 31 and the bellows 26 is widened by providing the protrusion prevention protrusion 31 in the eccentric direction, and they come into contact with each other. The effect which prevents is obtained more.

Here, with reference to FIG. 4, the principle of returning the clothes that have jumped out into the drum 21 by the pop-out preventing protrusion 31 will be described. A thick solid line arrow in FIG. 4 is a centrifugal force acting on clothing. The magnitude of the centrifugal force is mr (2πΩ / 60), where m (kg) is the mass of the clothing, r (m) is the distance from the rotation axis z ′, and Ω (r / min) is the rotational speed of the drum 21. ² (N). That is, if the clothes have the same mass, the centrifugal force increases as the distance r from the rotation axis z ′ increases and the rotation speed of the drum 21 increases. Also, the white arrow in FIG. 4 represents a force for pulling back the popped clothes into the drum due to the difference in centrifugal force between the clothes popping out side and the side accommodated in the drum 21. FIGS. 4A to 4C illustrate the ease of return of the garment that has popped out, depending on the drum rotation speed and the presence or absence of the pop-out prevention protrusion.

  First, as a case where the outer tub 23 is not provided with the protrusion prevention protrusion 31, FIG. 4A is a case where the dehydration rotational speed is low, for example, 100 r / min, and FIG. For example, 600 r / min. At a low rotational speed as shown in FIG. 4A, the centrifugal force acting on the garment is small, so the garment in the drum 21 is not crushed and the drum 21 is almost filled with the garment. For this reason, among the clothes partially jumping forward from the outer tub opening 23a, the side accommodated in the drum 21 is closer to the rotation axis z 'than the protruding side. Cheap. As a result, the centrifugal force acting on the garment is smaller on the side accommodated in the drum 21 than on the protruding side. That is, the force that promotes popping out is greater than the force that pulls the popped out clothing back into the drum 21, and it may be difficult to eliminate the jumping out of clothing. However, at a high rotational speed as shown in FIG. 4B, the clothes in the drum 21 are crushed and thinned by centrifugal force, and the distance from the rotational axis z 'increases. As a result, the centrifugal force acting on the garment is greater on the side accommodated in the drum 21 than on the protruding side, and the force to be pulled back into the drum 21 is increased. With this pulling back force, as the action of the garment jumping out side returns to the drum 21, the length of the garment popping out side becomes shorter and the difference in centrifugal force increases, so the pulling back force increases further. Become. Thus, as the number of revolutions of the drum 21 increases, the action of returning the popped clothes into the drum 21 increases.

  Next, the case where the outer tank 23 is provided with the protrusion preventing protrusion 31 will be described with reference to FIG. FIG. 4C shows a case where the rotational speed is lower than 600 r / min described above, for example, 300 r / min. The centrifugal force is smaller than that in FIG. At this time, among the clothes partially jumping forward from the outer tub opening 23a, the clothes protruding side rotates with the drum 21 and gets on the protrusion preventing projection so that the distance from the rotation axis z ′ is Shorter. As a result, even at a low rotational speed filled with the clothes in the drum 21, the centrifugal force tends to be larger on the side accommodated in the drum 21 than on the side where the clothes are protruding. That is, even at a low rotational speed, a force acts to pull the clothes that have jumped out into the drum 21. Therefore, by providing the pop-out preventing protrusion 31, the popped clothes can be pulled back into the drum 21 before the rotation speed of the drum 21 increases.

  Here, FIG. 5 is a right side sectional view of the outer tub 23 when the outer tub 23 sinks downward from the initial position due to the weight of clothing. At this time, the lower side of the rotation axis z ′ of the outer tub front end face 23 h is positioned on the outer peripheral side of the bellows 26, whereas the upper side thereof is positioned on the inner peripheral side of the bellows 26. That is, the pop-out preventing protrusion 31 moves in a direction away from the bellows 26. On the other hand, the pop-out prevention protrusion 31 and the door 2 move in the approaching direction. However, as described above, the door protrusion 2a has a smaller amount of protrusion on the drum 21 side, so that a clearance with the pop-out prevention protrusion 31 is ensured. It's easy to do. Therefore, by forming the pop-out preventing protrusion 31 above the rotation axis z ′, even when the outer tub 23 sinks due to the weight of the clothes, the door 2 or the bellows 26 and the pop-out preventing protrusion 31 are prevented from colliding. be able to.

  FIG. 6 is an enlarged view of the pop-out preventing protrusion 31 as viewed from the one-dot chain line AA of FIG. The clothes that have popped out rotate with the drum 21 and move from position P to position P ′ in FIG. 6. At this time, the clothes that have popped out may move forward as shown by a thick solid arrow and hit the door 2 with the momentum of colliding with the pop-out preventing protrusion 31. Furthermore, the clothing that hits the door 2 may be twisted by frictional force and return to the drum 21 as a lump. In this way, by forming the pop-out preventing protrusion 31 so as to protrude forward from the outer tank front end face 23h, an effect of eliminating the pop-up using the door 2 can also be obtained. The effect is that the clothes are filled in the drum 21 and the clothes and the door 2 rub against each other frequently, and the outer tub 23 sinks downward due to the weight of the clothes, and the distance between the pop-out prevention protrusion 31 and the door 2 is reduced. Grows when is approaching.

  Up to this point, the case where the protrusion prevention protrusion 31 extends substantially concentrically with the outer tub opening 23a has been shown, but as shown in FIG. 7, the protrusion prevention protrusion 32 moves to the rotation axis z ′ as it advances in the dehydration rotation direction. Even if it is provided so as to approach, the same effect can be obtained. According to the said structure, the position which the clothes which rotated with the drum 21 and moved from the position Q to the position Q 'contact | win the protrusion prevention protrusion 32 becomes the outer peripheral side of the outer tank front end surface 23h rather than the shape of FIG. Here, the cross section seen from the dashed-dotted line BB of FIG. 7 is shown in FIG. Of the pop-out prevention protrusions 32 extending in the dewatering rotation direction, the upstream side in the dewatering rotation direction is formed on the outer peripheral side. That is, by positioning the portion of the pop-out prevention protrusion 32 that first contacts the garment on the outer peripheral side, the length of the garment that has popped out on the outer peripheral side is shorter than the pop-out prevention protrusion 32, making it difficult to get over the pop-out prevention protrusion 32. . As a result, the tip of the garment that has popped out is easily located inside the pop-out prevention protrusion 32 and is guided to the pop-out prevention protrusion 32 extending toward the inner peripheral side as it advances in the spin-drying rotation direction. That is, since the clothes that have popped out are guided in the direction of decreasing centrifugal force, the action of being pulled back into the drum 21 is increased. In FIG. 7, the pop-out preventing protrusion 32 is curved, but the same effect can be obtained by a straight line.

  Further, as shown in FIG. 9, the pop-out preventing projection 33 has a guide surface 33a extending so as to approach the rotation axis z ′ as it advances in the dewatering rotation direction, and an innermost circumference that is substantially concentric with the outer tub opening 23a. You may form with the surface 33b. As described above, the jumped clothes rotating together with the drum 21 are guided to the inner peripheral side by the guide surface 33a, and are pulled back into the drum 21 by the difference in centrifugal force while the clothes are on the innermost peripheral surface 33b. . Further, the upper surface of the pop-out preventing projection 33 may be provided with a gradient for allowing water to flow off. In FIG. 9, the guiding portion is curved, but a straight line has the same effect.

  Here, in FIG. 10, the hot air outlet 23f protrudes to the inner peripheral side of the outer tub opening 23a, and the distance from the rotation axis z 'to the hot air outlet 23f is minimum. At this time, by providing the pop-out preventing projection 34 at the position of the hot air outlet in the vicinity of the hot air outlet 23f, the action of returning the popped-out clothing into the drum 21 is further increased. According to the above-described configuration, the hot air outlet 23f is the innermost peripheral portion of the outer tub opening 23a, and the pop-out prevention protrusion 34 is located at a portion where the centrifugal force acting on the clothes jumping out from the outer tub opening 23a is minimized. Will do. Therefore, the difference in centrifugal force between the protruding side of the clothes partially protruding from the outer tub opening 23a and the side accommodated in the drum 21 increases, and the protruding side is pulled back into the drum. The power to try increases. Even if the pop-out preventing projection 34 is positioned in the vicinity of the hot air blowing port 23f and downstream in the spin-drying rotation direction, the hot air blowing port 23f has an inner peripheral side before the popped clothes hit the pop-out preventing projection 34. Therefore, the same effect can be obtained. The same applies not only when the hot air outlet 23f protrudes toward the inner periphery but also when the washing water supply port 23e protrudes toward the inner periphery.

  In this embodiment, the drum type washing / drying machine has been described as an example, but the same applies to a drum type washing machine.

  FIG. 11 shows the protrusion prevention protrusion 35 in the second embodiment as viewed from the front of the outer tub 23. As shown in FIG. 11, the pop-out prevention projection 35 extends to the innermost peripheral surface 35b substantially concentric with the outer tub opening 23a and to both sides thereof so as to approach the rotation axis z ′ as it proceeds in the dewatering rotation direction. By providing the guide surface 35a, it is possible to obtain the action of guiding the clothes from which the guide portion has protruded to the inner peripheral side regardless of the direction of spin rotation. That is, even when the dewatering rotation direction is both forward and reverse directions, the same effect as in the first embodiment can be obtained. In addition, a gradient 35c is provided to incline downward from the front end face 23h of the outer tub in order to allow water to flow down. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 12 shows the upper protrusion prevention protrusion 36 and the lower protrusion prevention protrusion 37 in the third embodiment as viewed from the front of the outer tub 23. The upper protrusion prevention protrusion 36 is provided on the upstream side in the dewatering rotation direction with respect to the washing water supply port 23e. At this time, since the clothes that have jumped out hit the upper protrusion prevention protrusion 36 before the washing water supply port 23e, the washing water supply port 23e and the clothes can be prevented from rubbing. Further, the lower protrusion prevention protrusion 27 protrudes forward from the outer tank front end face 23h below the rotation axis z 'so as to reduce the gap between the outer tank front end face 23h and the charging port 1a. Thereby, even when the outer tub 23 sinks in the direction of gravity, it is possible to prevent small clothes such as socks and handkerchiefs from entering the gap between the insertion port 1a and the outer tub opening 23a. Furthermore, by providing a plurality of protrusions per one rotation of dewatering, such as the upper protrusion prevention protrusion 36 and the lower protrusion prevention protrusion 37, it is possible to prevent the clothes that are being released from jumping out again. The upper protrusion 36 and the lower protrusion prevention protrusion 37 can provide the same effects as those of the first and second embodiments, even if a guiding portion is provided. Further, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

23 Outer tank 23a Outer tank opening 23e Washing water supply port 23f Warm air outlet 23g Bellows fixing part 23h Outer tank front end face 31

Claims (4)

  A casing forming an outer shell, a bottomed cylindrical outer tank elastically supported by the casing, a bottomed cylindrical drum rotatably provided in the outer tank, and a motor for rotating the drum And in the drum type washing machine comprising the casing and the bellows connecting the outer tub, the protrusion protruding forward from the front end face of the outer tub is on the outer peripheral side of the outer tub opening for throwing in clothes, And the drum type washing machine provided in the inner peripheral side of the bellows fixing | fixed part which fixes the said bellows to the said outer tub side.   2. The drum-type washing machine according to claim 1, wherein a part of the protrusion extends so as to approach the peripheral edge of the outer tub opening as the drum advances in the dewatering rotation direction of the drum.   3. The drum type washing machine according to claim 1, wherein the protrusion is formed above the rotating shaft of the drum.   A casing forming an outer shell, a bottomed cylindrical outer tank elastically supported by the casing, a bottomed cylindrical drum rotatably provided in the outer tank, and a motor for rotating the drum And a bellows connecting the casing and the outer tub, and a hot air outlet for blowing warm air to the clothes in the drum, and the temperature is set on the inner peripheral side of the outer tub opening to which the clothes are put. In the drum-type washing and drying machine with the air blowing port protruding, a protrusion protruding forward from the front end face of the outer tub is on the outer peripheral side of the outer tub opening, and the bellows fixing that fixes the bellows to the outer tub side A drum-type washing and drying machine, characterized in that the drum-type washing and drying machine is formed in the vicinity of the warm air outlet.