WO2022134615A1

WO2022134615A1 - Washing machine

Info

Publication number: WO2022134615A1
Application number: PCT/CN2021/112120
Authority: WO
Inventors: 西野雅文
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2020-12-22
Filing date: 2021-08-11
Publication date: 2022-06-30
Also published as: JP2022099086A

Abstract

A washing machine, comprising: a water discharging passage (53) used for discharging water in a washing tub; and a valve mechanism (54) for opening and closing the water discharging passage (53). The valve mechanism (54) comprises: a box body (62) forming a part of the water discharging passage (53); a motor (63); a rod (65) having elasticity; and a roller (66) supported by the rod (65) and capable of rotating. The box body (62) is provided with an opening and closing portion (62C) capable of moving between a closed position and an open position farther from an opening (60D) than the closed position and capable of being elastically deformed. The motor (63) is provided with an output shaft (64) disposed farther from the opening (60D) than the opening and closing portion (62C). The rod (65) is connected to the output shaft (64). The roller (66) rotates around the output shaft (64) together with the rod (65) according to the work of the motor (63), so that the opening and closing portion (62C) moves from the open position to the closed position.

Description

washing machine

technical field

The present invention relates to washing machines.

Background technique

A typical washing machine includes a washing tub for storing water, a drain path for draining the water in the washing tub, and a valve mechanism for opening and closing the drain path. In a commercial washing machine installed in a laundromat, it is required to shorten the washing operation time so that it can be used by a large number of customers, and the drainage path and the valve mechanism are arranged so that a large amount of water can be discharged in a short time.

FIG. 1 illustrates a conventional drain 1 and valve mechanism 2 used in a commercial washing machine. A part of the drainage channel 1 is constituted by a longitudinally extending pipe portion 3 . An opening 3A is provided at the lower end of the pipe portion 3 . The valve mechanism 2 includes: a frame 4 supporting the pipe portion 3; a rubber-made case 5 fitted to the lower end of the pipe portion 3; an operation shaft 6 extending longitudinally through a partition wall 4A in the middle of the frame 4; and a motor 8 having a configuration The output shaft 7 on the lower side of the operation shaft 6 is fixed to the frame 4 , and the substantially semicircular cam 9 is fixed to the output shaft 7 .

The case 5 integrally has a deformed portion 5A as a longitudinally flat hollow body and a cylindrical portion 5B laterally extended from the deformed portion 5A. The inner space of the deformed portion 5A and the inner space of the cylindrical portion 5B are connected to each other, and constitute a part of the drainage channel 1 . The deformation portion 5A is arranged in the space above the partition wall 4A in the frame 4 , and is fixed to the lower end of the pipe portion 3 . In the deformed portion 5A, the opening and closing portion 5C constituting the bottom thereof is in a state of facing the opening 3A of the pipe portion 3 from the lower side. In the case 5, at least the deformable portion 5A can be elastically deformed so that the opening and closing portion 5C can be moved up and down.

The valve mechanism 2 further includes: a pair of upper and lower bearings 10 mounted on the partition wall 4A and supporting the operating shaft 6; a spring 11 mounted on the upper end of the operating shaft 6 and contacting the opening and closing portion 5C from the lower side; The frame 4 is arranged around the output shaft 7 of the motor 8 . As shown in FIG. 2 , when the cam 9 is in a state where the cam 9 is in a state of being away from the operation shaft 6 downward, the opening and closing portion 5C is in an open position away from the opening 3A of the pipe portion 3 downward, and the pipe portion 3 and the case 5 are connected through the opening 3A. , the drainage channel 1 is in an open state, so the water in the washing tub will flow through the drainage channel 1 and be discharged to the outside of the machine.

When the output shaft 7 and the cam 9 are half-rotated by energizing the motor 8 with the opening and closing portion 5C in the open position (see the bold arrow in FIG. 2 ), the cam 9 pushes up the operation shaft 6 . Thereby, since the upward thrust of the cam 9 is transmitted to the opening and closing portion 5C via the spring 11, the opening and closing portion 5C is lifted up to the closed position shown in FIG. 3 to close the opening 3A from the lower side. Thereby, the pipe portion 3 and the case 5 are cut off, and the drainage passage 1 is cut off at the opening 3A, so that the drainage of the washing tub is stopped. In addition, when the cam 9 that has rotated halfway turns on the microswitch 12, energization to the motor 8 is stopped. Then, when the motor 8 is energized, the microswitch 12 is turned off, and the cam 9 is further half-rotated to move away from the operation shaft 6 downward, so that the opening and closing portion 5C is lowered to open position (see Figure 2).

Since a commercial washing machine is used more frequently than a domestic washing machine, the valve mechanism 2 operates at a high frequency. Therefore, the portions of the cam 9 and the operation shaft 6 that are in contact with each other are easily worn. When the cam 9 and the operation shaft 6 continue to wear, even if the cam 9 rotates, the push-up amount of the operation shaft 6 will decrease. Therefore, the opening and closing portion 5C of the box body 5 cannot reach the closed position, and the opening and closing of the pipe portion 3 cannot be completely closed. Opening 3A. Then, the water sealing force of the valve mechanism 2 with respect to the drainage channel 1 is reduced, so that even when the drainage of the washing tub is stopped, there is a possibility that the water in the washing tub also leaks unexpectedly. In addition, the conventional valve mechanism 2 has a large number of parts. In particular, since the spring 11 is provided so that the opening and closing portion 5 can be raised to the closed position even when the rubber case 5 is strained, the number of parts in the structure for raising and lowering the opening and closing portion 5C in the valve mechanism 2 is reduced. increase is inevitable. When the number of parts is large, the valve mechanism 2 becomes complicated, and there is a fear that failure may occur.

SUMMARY OF THE INVENTION

The problem to be solved by the invention

The present invention has been accomplished on the basis of this background, and an object of the present invention is to provide a washing machine in which the durability of the valve mechanism for drainage is improved.

solution to the problem

The present invention is a washing machine, comprising: a washing tub for storing water; a drainage channel for draining water in the washing tub, a part of the drainage channel is formed by a pipe part with an opening at one end; and a valve mechanism for The drainage channel is opened and closed, and the valve mechanism includes a case having one of a closed position that closes the opening and an open position that can open the opening arranged farther away from the opening than the closed position. The opening and closing portion that moves between the two is elastically deformable and constitutes a part of the drainage passage; the motor has an output shaft disposed farther from the opening than the opening and closing portion, and operates by being energized; the rod has elastically connected to the output shaft; and a roller supported by the rod so as to be rotatable, the roller and the rod being rotated around the output shaft in accordance with the operation of the motor, so that the opening and closing portion is rotated from the output shaft. The open position moves to the closed position.

Further, the present invention is characterized in that a reinforcing plate is provided on a surface portion of the opening and closing portion, and the reinforcing plate is provided with: a guide groove for guiding the roller rotating around the output shaft; and a positioning groove for The roller that moved the opening and closing portion to the closed position is positioned.

In addition, the present invention is characterized in that the valve mechanism further includes a detection unit that detects that the roller has moved the opening/closing unit to the closed position, and that, upon detection by the detection unit, the roller causes the roller to move the opening/closing unit. The opening and closing portion has moved to the closed position, and the energization of the motor is stopped.

Invention effect

According to the present invention, the valve mechanism for opening and closing the drainage passage in the washing machine includes: a casing constituting a part of the drainage passage; and a motor having an opening and closing portion that opens and closes the opening of the pipe portion of the drainage passage in the casing. An output shaft disposed away from the opening; a rod connected to the output shaft; and a roller supported by the rod. When the opening and closing portion is in the open position, the pipe portion and the case are connected through the open opening, and the drainage channel is opened, so that the water in the washing tub can be drained from the drainage channel. When the motor is energized and operated in this state, the roller rotates around the output shaft together with the lever to move the opening and closing portion from the open position to the closed position. At this time, the opening of the pipe portion is closed by the opening and closing portion at the closed position, and the drainage passage is cut off, so that the drainage of the washing tub can be stopped.

Since the roller can rotate when the opening and closing portion is moved, even if the valve mechanism is operated at a high frequency, the portions of the opening and closing portion and the roller that are in contact with each other are less likely to be worn. Therefore, the durability of the valve mechanism for drainage can be improved.

In addition, even if the case body is strained, the elastic lever can move the opening and closing portion to the closed position by the applied force thereof. In this case, the valve mechanism can be simply configured by omitting the above-described conventional spring 11 and the like (see FIG. 2 ) and reducing the number of parts, so that failure of the valve mechanism can be suppressed. Thereby, the durability of the valve mechanism can be further improved.

Further, according to the present invention, since the opening and closing portion is actually the reinforcing plate contacting the roller, wear of the opening and closing portion itself can be prevented. Thereby, the durability of the valve mechanism can be further improved. Furthermore, in the reinforcing plate, the guide grooves guide the rollers, and the positioning grooves position the rollers whose opening and closing parts are moved to the closed position, so that the rollers can be moved accurately so that the opening and closing parts can reach the closed position.

Moreover, according to this invention, when a detection part detects that a roller has moved an opening and closing part to a closed position, energization to a motor is stopped. Therefore, the closed position of the opening and closing portion, that is, the drain stop of the washing tub can be maintained in a state in which the power supply to the motor is stopped, so that the power consumption of the washing machine can be reduced.

Description of drawings

FIG. 1 is a perspective view of a conventional valve mechanism.

FIG. 2 is a vertical cross-sectional view of a conventional valve mechanism.

FIG. 3 is a vertical cross-sectional view of a conventional valve mechanism.

Fig. 4 is a perspective view of the washing machine according to the embodiment of the present invention.

Fig. 5 is a perspective view of a drain passage and a valve mechanism included in the washing machine according to the embodiment of the present invention.

6 is a perspective view of a cassette included in the valve mechanism according to the embodiment of the present invention.

7 is a vertical cross-sectional view of a drainage passage and a valve mechanism according to an embodiment of the present invention.

8 is a vertical cross-sectional view of a drainage passage and a valve mechanism according to an embodiment of the present invention.

9 is a longitudinal cross-sectional view of a drainage passage and a valve mechanism according to an embodiment of the present invention.

FIG. 10 is a perspective view of a drainage channel and a valve mechanism according to an embodiment of the present invention.

11 is a vertical cross-sectional view of a drainage passage and a valve mechanism according to an embodiment of the present invention.

Description of reference numerals

50: washing machine; 52: washing tub; 53: drainage path; 54: valve mechanism; 60: pipe part; 60D: opening; 62: box body; 62C: opening and closing part; 62CA: lower surface part; : Output shaft; 65: Rod; 66: Roller; 70: Reinforcing plate; 70A: Lower surface; 70B: Guide groove; 70C: Positioning groove;

Detailed ways

Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. Fig. 4 is a perspective view of the washing machine 50 according to the embodiment of the present invention. The up-down direction in FIG. 4 is called up-down direction Z of the washing machine 50 . Among the vertical directions Z, the upper side is referred to as an upper side Z1, and the lower side is referred to as a lower side Z2. It should be noted that the vertical direction Z may be a vertical direction or a direction slightly inclined with respect to the vertical direction.

The washing machine 50 includes a drum washing machine, a vertical washing machine, a double-tub washing machine, and an all-in-one washer-drying machine with a drying function. Hereinafter, the washing machine 50 will be described by taking a drum washing machine that only performs a washing operation without a drying function as an example. The washing machine 50 is for commercial use, and is used in a laundromat or the like. The washing machine 50 includes: a box-shaped casing 51 forming the outer contour of the washing machine; a washing tub 52 arranged in the casing 51; Extends to the rear side; and the valve mechanism 54 opens and closes the drainage passage 53 . The washing tub 52 is a water tub for storing water. The washing tub 52 accommodates a rotatably driven drum (not shown). The user can open the door 55 provided on the front surface of the case 51 to allow the laundry to enter and exit the drum.

FIG. 5 is a perspective view of the drain passage 53 and the valve mechanism 54 . A part of the drainage channel 53 is constituted by a rubber-made pipe portion 60 extending in the vertical direction Z, that is, in the vertical direction. The pipe portion 60 is a midway portion of the drainage passage 53 . The pipe portion 60 integrally includes a bellows portion 60A, a cylindrical upper cylinder portion 60B extending from the bellows portion 60A to the upper side Z1, and a cylindrical lower cylinder portion 60C extending from the bellows portion 60A to the lower side Z2. A circular opening 60D is provided at the lower end of the lower cylindrical portion 60C, which is an example of one end of the pipe portion 60 .

The valve mechanism 54 is arranged on the lower side Z2 (see FIG. 4 ) of the washing tub 52 in the casing 51 . The valve mechanism 54 includes: a frame 61 supporting the pipe portion 60; a box body 62 mounted on the lower end of the pipe portion 60; an electric motor 63 fixed to the frame 61; a rod 65 fixed to an output shaft 64 of the motor 63; and a roller 66 , assembled on the front end of the rod 65 .

The frame 61 has a pair of vertical plates 61A arranged in parallel, and a horizontal plate 61C spanned between the upper end portions 61B of the pair of vertical plates 61A. The lower end portion 61D of at least one of the pair of vertical plates 61A is bent in an L shape, and is fixed to the case 51 . The upper end portions 61B of the pair of vertical plates 61A are bent so as to approach each other, and are fixed to the horizontal plate 61C by fastening members (not shown) such as bolts. The horizontal plate 61C is arranged to be inclined with respect to the horizontal direction. A circular through hole 61E is formed in the horizontal plate 61C. The space surrounded by the pair of vertical plate 61A and the horizontal plate 61C is the inner space 61F of the frame 61 . The lower cylindrical portion 60C of the pipe portion 60 is fitted into the through hole 61E and fixed to the frame 61 so that the opening 60D at the lower end thereof is arranged in the inner space 61F.

The case 62 integrally includes a deformation portion 62A that is a flat hollow body in the vertical direction Z, and a cylindrical portion 62B extending obliquely downward from the deformation portion 62A, and most are made of rubber. The inner space of the deformed portion 62A and the inner space of the cylindrical portion 62B are in a state of being connected to each other, and constitute a part of the drainage channel 53, specifically, a midway portion of the drainage channel 53. The deformed portion 62A is inclined along the lower surface portion of the horizontal plate 61C in the inner space 61F of the frame 61 . It should be noted that the orientation of the deforming portion 62A is not limited to being inclined, and may be horizontal or vertical, and accordingly, the installation angle of the entire valve mechanism 54 can be arbitrarily changed. Therefore, the pipe portion 60 may extend in the front-rear direction and the left-right direction, and the opening 60D may be provided at the front end and the left end of the pipe portion 60 .

The lower cylindrical portion 60C of the pipe portion 60 is in a state of being connected to the upper surface portion of the deformation portion 62A. The opening 60D at the lower end of the lower cylindrical portion 60C is in a state of entering the inner space of the deformation portion 62A from the upper side Z1. The peripheral edge part 60E of the opening 60D of the lower cylinder part 60C is arrange|positioned so that it may protrude into the internal space of the deformation|transformation part 62A (refer FIG. 7). The lower cylindrical portion 60C can be divided into: a first portion 60CA, located on the upper side Z1 of the horizontal plate 61C of the frame 61; a second portion 60CB, located on the lower side Z2 of the horizontal plate 61C; The two parts 60CB are surrounded, and the second part 60CB may be a part of the deformation part 62A (see FIG. 7 ). The inner cylinder part 60CC is made of resin, for example. Therefore, the inner tube portion 60CC has higher rigidity than the first portion 60CA and the second portion 60CB made of rubber, and reinforces the first portion 60CA and the second portion 60CB.

In the deformed portion 62A, the opening and closing portion 62C constituting the bottom thereof is in a state of facing the opening 60D of the pipe portion 60 from the lower side. In the case 62, at least the deformation portion 62A can be elastically deformed so that the opening and closing portion 62C can be raised and lowered. The cylindrical portion 62B has a connecting portion 62BA that extends out of the inner space 61F of the frame 61 while expanding in the vertical direction Z from the deforming portion 62A, and a cylindrical portion 62BC that is inserted into the connecting portion 62BA on the side opposite to the deforming portion 62A side. The opening 62BB. The connection portion 62BA is made of rubber, whereas the cylindrical portion 62BC is made of resin, for example, and has higher rigidity than the connection portion 62BA. The cylindrical portion 62B may extend directly downward from the deformed portion 62A.

The motor 63 is a so-called geared motor, and is fixed to the outer surface portion of the vertical plate 61AA on the opposite side of the inner surface portion facing the inner space 61F of the pair of vertical plates 61A of the frame 61 . A through hole 61G through which the output shaft 64 of the motor 63 is inserted is formed in the vertical plate 61AA. A weight reduction hole 61H may be formed in each vertical plate 61A. The output shaft 64 is arranged in the inner space 61F so as to be lower Z2 than the opening and closing portion 62C of the deforming portion 62A, that is, away from the opening 60D, and extends in the first lateral direction X, which is the opposing direction of the pair of vertical plates 61A. The first lateral direction X is one of the lateral directions orthogonal to the vertical direction Z. The second lateral direction Y, which is orthogonal to both the first lateral direction X and the vertical direction Z, is also one of the lateral directions. The first transverse direction X may be the left-right direction and the second transverse direction Y may be the front-rear direction, or the first transverse direction X may be the front-rear direction and the second transverse direction Y may be the left-right direction. The lateral direction may be either a horizontal direction or a direction slightly inclined with respect to the horizontal direction. The motor 63 operates by being energized, and the output shaft 64 rotates.

The lever 65 is constituted by a metal leaf spring and has elasticity. The rod 65 has an L-shaped overall shape. Such a rod 65 integrally has a curved portion 65A that is curved in a circular arc shape, a base portion 65B that extends from the curved portion 65A and is connected to the output shaft 64 of the motor 63, and a front end portion 65C that extends from the curved portion 65A to a direction different from the base portion 65B extension in the direction. The end part farthest from the curved part 65A among the base parts 65B is formed in a ring shape surrounding the output shaft 64 , and is fixed to the output shaft 64 by a plurality of small bolts 67 . When the output shaft 64 is rotated according to the operation of the motor 8 , the rod 65 rotates around the output shaft 64 integrally with the output shaft 64 .

A U-shaped bracket 65D is integrally provided at the end portion farthest from the curved portion 65A in the distal end portion 65C. The bracket 65D has a pair of branch portions 65E that are branched and juxtaposed in the first lateral direction X. As shown in FIG. The shaft portion 68A (see FIG. 7 ) of the bolt 68 extends in the first lateral direction X, and is spanned between the pair of branch portions 65E. The distal end portion of the shaft portion 68A is in a state of protruding from between the pair of branch portions 65E. A nut 69 is assembled to the distal end portion of the shaft portion 68A.

The roller 66 is a cylindrical body, and the center axis|shaft is arrange|positioned between the pair of branch parts 65E of the holder 65D in the state along the 1st lateral direction X. The shaft portion 68A of the bolt 68 is inserted through the center portion of the roller 66 , and the roller 66 is supported by the rod 65 via the bolt 68 . The roller 66 can rotate around the bolt 68 in this state. The rotation of the roller 66 means that the roller 66 rotates about its own central axis. In addition, when the output shaft 64 is rotated according to the operation of the motor 8 , the roller 66 rotates around the output shaft 64 together with the output shaft 64 and the rod 65 .

FIG. 6 is a perspective view of the case 62 as viewed from the lower side Z2. The reinforcement plate 70 is provided in the lower surface part 62CA which is an example of a surface part of the opening-closing part 62C of the case 62. As shown in FIG. The reinforcing plate 70 is a metal circular plate arranged concentrically with the lower cylindrical portion 60C of the pipe portion 60 . A cylindrical lower convex portion 62CB that is flat in the vertical direction Z of the same shape as the reinforcing plate 70 is provided on the lower surface portion 62CA. The reinforcing plate 70 is integrated with the lower convex portion 62CB by, for example, insert molding. In addition, the outer edge part 62CD of the side opposite to the cylindrical part 62B side among the opening and closing parts 62C is formed in the arc shape concentric with the lower convex part 62CB.

The lower surface portion 70A of the reinforcing plate 70 is provided with a guide groove 70B extending linearly along the second lateral direction Y, and a positioning groove 70C extending linearly along the first lateral direction X. The guide grooves 70B are elongated in the second transverse direction Y, most of which have a constant depth. The positioning groove 70C is long in the first lateral direction X, and has an arc-shaped groove bottom. The guide groove 70B and the positioning groove 70C are arranged in a cross shape so as to intersect at the center of each other. The intersection of the guide groove 70B and the positioning groove 70C coincides with the center of the circular reinforcing plate 70 . At the intersection of the guide groove 70B and the positioning groove 70C, the positioning groove 70C may be slightly deeper than the guide groove 70B.

A detection portion 71 for detecting the position of the opening and closing portion 62C of the deformation portion 62A is mounted at a position of the lower surface portion 70A of the reinforcing plate 70 avoiding the guide groove 70B and the positioning groove 70C. An example of the detection unit 71 is a micro switch. The detection unit 71 has a small rod-shaped work piece 71A. The work piece 71A is arranged in the vicinity of the end of the positioning groove 70C. The washing machine 50 includes a control unit 80 (refer to FIG. 4 ) composed of a microcomputer or the like. The control unit 80 executes the washing operation in the washing machine 50 . The detection result of the detection unit 71 is input to the control unit 80 . As a part of the washing operation, the control unit 80 controls the energization of the motor 63 to execute a drainage process for discharging water from the washing tub 52 .

Next, the operation of the valve mechanism 54 will be described. FIG. 7 is a longitudinal cross-sectional view of the drain passage 53 and the valve mechanism 54 . As shown in FIG. 7 , when the roller 66 is in the standby position where the rollers 66 are at the standby position where the opening and closing portion 62C of the casing 62 is separated from the lower side Z2, the opening and closing portion 62C is at the lower side Z2 away from the opening 60D of the pipe portion 60 to open the opening 60D. open position. At this time, the pipe portion 60 and the case 62 are connected through the open opening 60D, and the drainage channel 53 is in an open state.

When the motor 63 is energized and operated with the opening and closing portion 62C in the open position, the roller 66 in the standby position so far rotates around the output shaft 64 together with the rod 65 in accordance with the operation of the motor 63 . In FIG. 7, the output shaft 64, the rod 65, and the roller 66 rotate clockwise. At this time, the lever 65 is rotated until the curved portion 65A is positioned on the downstream side in the rotational direction of the root portion 65B and the front end portion 65C, that is, it takes the lead. Then, as shown in FIG. 8 , the roller 66 comes into contact with the opening and closing portion 62C of the case 62 from the lower side Z2 in accordance with the rotation around the output shaft 64 . Specifically, the roller 66 contacts the lower surface portion 70A of the reinforcing plate 70 at the lower surface portion 62CA of the opening and closing portion 62C, and pushes up the reinforcing plate 70 and the opening and closing portion 62C while rotating. As a result, the opening and closing portion 62C approaches the opening 60D of the pipe portion 60 from the lower side Z2.

Then, the roller 66 is further rotated around the output shaft 64 , thereby being received in the guide groove 70B of the lower surface portion 70A of the reinforcing plate 70 and guided to the second lateral direction Y. The roller 66 accommodated in the guide groove 70B advances toward the center of the guide groove 70B while pushing up the reinforcing plate 70 . Then, as shown in FIG. 9 , when the rollers 66 accommodated in the guide grooves 70B are fitted into the positioning grooves 70C of the lower surface portion 70A, the opening and closing portion 62C is pushed up to the upper limit closed position and abuts against the opening 60D of the pipe portion 60 . The entire range of the peripheral edge portion 60E thereby closes the opening 60D from the lower side Z2. Thereby, since the drain passage 53 is cut|disconnected, the drain of the washing tub 52 can be stopped. In addition, the conical upper convex part 62CE which enters into the opening 60D is provided in the upper surface part of 62 C of opening-closing parts.

In this way, the roller 66 rotates around the output shaft 64 together with the output shaft 64 and the rod 65 according to the operation of the motor 63, and moves the opening and closing portion 62C from the open position to the closed position. At this time, as shown in FIG. 10 , the positioning grooves 70C receive the rollers 66 and the bolts 68 and nuts 69 around the rollers 66 that have moved the opening and closing portion 62C to the closed position, and are aligned in the first horizontal direction X and the second horizontal direction Y, respectively. to locate.

Further, when the opening and closing portion 62C is raised to the closed position, the nut 69 assembled to the bolt 67 supporting the roller 66 contacts the operating piece 71A of the detection portion 71 to turn the detection portion 71 on. As a result, the control unit 80 (see FIG. 4 ) stops energization to the motor 63 . In this way, the detection unit 71 detects that the roller 66 has moved the opening and closing unit 62C to the closed position, and in accordance with the detection by the detection unit 71 , energization to the motor 63 is stopped. Therefore, the closed position of the opening and closing portion 62C, that is, the drain stop of the washing tub 52 can be maintained in a state where the power supply to the motor 63 is stopped, so that the power consumption of the washing machine 50 can be reduced. While the opening and closing portion 62C is raised from the open position to the closed position in this way, the output shaft 64 , the lever 65 and the roller 66 basically rotate halfway.

In addition, the vertical plate 61AA in which the motor 63 is mounted in the frame 61 is arrange|positioned so that the lower part 61AB which actually mounts the motor 63 may be bent in a crank shape so that it may approach the rod 65 rather than the upper part 61AC. The vertical plate 61AA further has an intermediate portion 61AD extending in the first lateral direction X by connecting the upper end of the lower portion 61AB and the lower end of the upper portion 61AC. The inner space 61F of the frame 61 has an inverted L shape in which the upper area 61FA is larger than the lower area 61FB in the first lateral direction X, the deformation portion 62A of the box body 62 is arranged in the upper area 61FA, and the output shaft 64 and the output shaft 64 are arranged in the lower area 61FB. Rod 65.

The lever 65 and the roller 66 rotate around the output shaft 64 when the detection portion 71 is turned off and the motor 63 is energized under the control of the control portion 80 with the opening and closing portion 62C of the deforming portion 62A in the closed position. In this way, first, the roller 66, the bolt 68, and the nut 69 are disengaged from the positioning groove 70C. Then, as shown in FIG. 11 , the roller 66 is detached from the guide groove 70B while rotating, and is separated from the closing portion 62C in the lower side Z2. Thereby, the opening and closing part 62C is moved from the closed position to the lower side Z2 by its own weight and the weight of the water in the pipe part 60 . Then, when the lever 65 and the roller 66 start to rotate substantially halfway from the state where the opening and closing portion 62C is in the closed position, the opening and closing portion 62C is disposed at the lower side Z2 from the closed position, that is, at the open position away from the opening 60D (see FIG. 7 ). In this way, the opening and closing portion 62C can move between the open position and the closed position in accordance with the rotation of the lever 65 and the roller 66 accompanying the operation of the motor 63 .

Since the roller 66 can rotate when the opening and closing portion 62C is pushed up, even if the valve mechanism 54 is operated at a high frequency, the portions of the opening and closing portion 62C and the roller 66 in contact with each other are not easily worn. Therefore, the durability of the valve mechanism 54 for drainage can be improved. In addition, even if the case 62 is damaged due to changes over time or the like, the elastic rod 65 can use its force to raise the opening and closing portion 62C to the closed position, so that the opening 60D of the pipe portion 60 can be prevented from being drained when the water is stopped. of water leakage. In addition, in this case, compared with the valve mechanism 2 of the conventional example, the above-mentioned bearing 10 and spring 11 are omitted and the number of parts is reduced, whereby the valve mechanism 54 can be simply configured, and therefore, the valve mechanism 54 can be suppressed from being damaged. Fault. Thereby, the durability of the valve mechanism 54 can be further improved. In addition, by reducing the number of components, the cost of the valve mechanism 54 can be reduced, and the productivity can also be improved.

In addition, in the opening and closing portion 62C, since the reinforcing plate 70 actually contacts the roller 66, the wear of the opening and closing portion 62C itself can be prevented. Thereby, the durability of the valve mechanism 54 can be further improved. Furthermore, in the lower surface portion 70A of the reinforcing plate 70, the guide groove 70B guides the roller 66, and the positioning groove 70C positions the roller 66 that moved the opening and closing portion 62C to the closed position, so that the opening and closing portion 62C can reach the closed position. position in such a way that the rollers 66 move correctly.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope described in the claims.

Claims

A washing machine, characterized in that, comprising:

water-retaining washing tub;

a drainage path for draining the water in the washing tub, and a part of the drainage path is constituted by a pipe portion provided with an opening at one end; and

a valve mechanism to open and close the drainage circuit;

The valve mechanism includes:

The case body has an opening and closing portion movable between a closed position that closes the opening and an open position that opens the opening disposed farther away from the opening than the closed position, and is elastically deformable, and constitutes the part of a drain;

a motor that has an output shaft disposed farther from the opening than the opening and closing portion, and operates by being energized;

a rod, having elasticity, connected to the output shaft; and

rollers, supported by the rod, rotatable,

The roller rotates around the output shaft together with the lever in accordance with the operation of the motor, and moves the opening and closing portion from the open position to the closed position.
The washing machine of claim 1, wherein

A reinforcing plate is provided on the surface of the opening and closing portion,

The reinforcing plate is provided with a guide groove for guiding the roller that rotates around the output shaft, and a positioning groove for positioning the roller that has moved the opening and closing portion to the closed position.
The washing machine according to claim 1 or 2, characterized in that,

The valve mechanism further includes a detection unit that detects that the roller moves the opening/closing unit to the closed position,

When the detection unit detects that the roller moves the opening and closing unit to the closed position, the energization of the motor is stopped.