JP5675565B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum type washing machine.

The drum type washing machine includes a drum that can store laundry, and an outer tub in which the drum is disposed, and the drum is a rotating shaft that is inclined so that the horizontal or the opening side of the drum is raised. (See Patent Document 1) .

JP 2007-167391 A

  The side plate of the drum-type washing machine casing is made of a steel plate, and usually has a squeezed shape with unevenness to increase rigidity in order to suppress vibration during dehydration, for example. Improvement is requested.

This invention is made in view of such a situation, and it aims at providing the drum type washing machine which can reduce the maximum deformation of the side plate of a housing | casing and can improve the rigidity of a housing | casing. To do.

In order to achieve the above object, a drum-type washing machine of the present invention includes a drum that can store laundry , an outer tub in which the drum is disposed, and a front cover that has a slot for taking in and out laundry. The housing includes a left and right side plates, a back cover, and a top cover and supports the outer tub, and the side plates are formed above the first recess and the first recess, respectively, recessed to the inside of the housing. A second recess, and a third recess formed below the first recess, the first recess extending upwardly from the left end toward the center, and an upper left inclined wall portion extending from the right end. An upper right inclined wall portion that is inclined and extended upward toward the center, a lower left inclined wall portion that is inclined and extended downward from the left end toward the center, and an inclined downward toward the center from the right end. The lower right inclined wall portion extending and the upper left inclined wall portion, An upper right inclined wall portion, the lower left inclined wall portion, and a bottom portion surrounded by the lower right inclined wall portion, an angle formed by the upper left inclined wall portion and the upper right inclined wall portion, and the lower left inclined The angle formed by the wall portion and the lower right inclined wall portion is greater than the angle formed by the upper left inclined wall portion and the lower left inclined wall portion, and the angle formed by the upper right inclined wall portion and the lower right inclined wall portion. The second concave portion has an upper left inclined concave portion extending upwardly inclined from the left end toward the center, and an upper right inclined concave portion extending inclined upward from the right end toward the center, The third recess has a lower left inclined recess extending downward from the left end toward the center, and a lower right inclined recess extending downward from the right end toward the center, and the upper left inclination The angle formed by the recess and the upper right inclined recess, and the lower left inclined recess and the Angle between the lower inclined recesses, characterized in that the larger upper left inclined wall portion and the left lower inclined wall portion and forms the angle, and than the right upper inclined wall portion and the right lower inclined wall portion and forms an angle .

ADVANTAGE OF THE INVENTION According to this invention, the drum type washing machine which can reduce the maximum deformation amount of the side plate of a housing | casing and can improve the rigidity of a housing | casing can be provided.

It is a figure which shows the external appearance of the drum type washing machine which concerns on one Embodiment of this invention, (a) is a top view, (b) is a front view. It is a side view which shows the structure inside the drum type washing machine shown by FIG. It is a perspective view which shows the structure inside the drum type washing machine shown by FIG. It is a longitudinal cross-sectional view which follows the IV-IV line of FIG.1 (b). It is an expansion perspective view of a liquid supply unit. It is an enlarged view which shows the external appearance of a liquid supply unit, (a) is a top view, (b) is a front view. It is a perspective view which shows a mode that a detergent box is mounted | worn between a detergent case and a shower case. It is a disassembled perspective view of a detergent case and a shower case. It is an enlarged view which shows the external appearance of a detergent box, (a) is a top view, (b) is a front view, (c) is a side view. It is an enlarged perspective view of a shower case, (a) is a perspective view seen from the right front side upper part, (b) is a perspective view seen from the right back side lower part. It is a top view of the main-body part of a shower case. It is a perspective view of the main-body part of a shower case. It is a perspective view of the main-body part of the shower case cut | disconnected by the plane in alignment with the XIII-XIII line | wire of FIG. It is the perspective view which looked at the outer tub with which the water seal trap part was attached from back upper direction. It is a perspective view which shows the state which removed the cover of the water seal trap part shown in FIG. It is a partial cross section perspective view around a backflow prevention part of drainage. It is a figure which shows the sealing body of a backflow prevention part, (a) is a perspective view, (b) is a front view, (c) is a longitudinal cross-sectional view. It is an expanded sectional view of the bearing support part periphery which supports the bearing of a rotating shaft. It is an expanded sectional view of the bearing support part periphery which concerns on the modification which supports the bearing of a rotating shaft. (A) is the figure which looked at the side board from the outer side in the direction perpendicular | vertical to the surface, (b) is a perspective view of the side board shown to (a). (A) is the figure which looked at the side plate which concerns on a comparative example from the outer side in the direction perpendicular | vertical to the surface, (b) is a perspective view of the side plate which concerns on the comparative example shown to (a). It is a longitudinal cross-sectional view of another drum type washing machine with different washing capacity.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Drawing 1 is a figure showing the appearance of the drum type washing machine concerning one embodiment of the present invention, (a) is a top view and (b) is a front view. FIG. 2 is a side view showing an internal structure of the drum type washing machine shown in FIG. FIG. 3 is a perspective view showing an internal structure of the drum type washing machine shown in FIG. FIG. 4 is a longitudinal sectional view taken along line IV-IV in FIG. In order to clarify the explanation, the front, rear, left, right and up directions are set as shown in FIG.

<Overall configuration>
As shown in FIG. 1, the drum type washing machine S has a housing 1 whose outer shell is configured by combining a steel plate and a resin molded product. The housing 1 includes a base 1f, and left and right side plates 1a and 1b, a front cover 1c, a back cover (back plate) 1d (see FIG. 4), and a top cover 1e are attached above the base 1f. A box-shaped housing 1 is formed.

  At the approximate center of the front cover 1c, there is formed a loading slot 1g (see FIG. 4) for loading and unloading laundry such as clothes into and out of the drum 3 (see FIG. 2). The door 7 that is opened and closed when attached is attached so as to be opened and closed by a hinge mechanism (not shown). A handle 7 a for releasing a lock mechanism (not shown) of the door 7 is provided on the right side of the door 7. By pulling the handle 7a forward, the lock mechanism is released and the door 7 is opened. When the door 7 is pressed against the front cover 1c, it is locked and closed.

  An operation panel 6 including a power switch, an operation switch, a course setting dial, a display device, and the like is provided on the upper portion of the housing 1. On the left side of the operation panel 6, a drawer-type detergent box (detergent throwing section) 12 for placing a detergent, a finishing agent and the like is disposed.

  As shown in FIG. 2, the drum-type washing machine S includes a drum 3 as an inner tub that can store laundry in a housing 1. The drum 3 is rotatable around a rotating shaft 65 (see also FIG. 4) coupled to the drum 3. An opening 3a (see also FIG. 4) for taking in and out the laundry is formed on the front end face of the drum 3, and a fluid balancer 3b (integrated with the drum 3) is formed outside the opening 3a in the radial direction. 4 is also provided).

  Here, the rotary shaft 65 coupled to the drum 3 is set horizontally. However, the rotation center axis of the drum 3 may be inclined so that the opening 3a side becomes higher. 2 shows a state in which the left side plate 1a, the back cover 1d (see FIG. 4), and the top cover 1e of the drum type washing machine S are removed (the same applies to FIG. 3).

  As shown in FIGS. 2 and 3, the drum-type washing machine S includes a bottomed cylindrical outer tub (tank) 2 on the same axis as the drum 3. The outer tub 2 is supported by the housing 1. A motor 4 for rotating the rotary shaft 65 is attached to the center of the outer side of the outer tub 2, and the rotary shaft 65 passes through the outer tub 2 and is coupled to the drum 3.

  The outer tub 2 is supported in an anti-vibration manner by a damper 5 whose lower side is fixed to the base 1f. On the upper left side of the bottom wall 2b (see FIG. 14) of the outer tub 2, a water-sealed trap portion 81 having an inlet 83a into which a liquid containing water, detergent, finishing agent, etc. flowing into the outer tub 2 flows is provided. Yes.

  On the upper left side in the housing 1, a liquid supply unit 10 for supplying a liquid containing water, a detergent, a finishing agent and the like into the outer tub 2 is provided. The outlet 14 of the liquid supply unit 10 and the inlet 83 a of the water seal trap portion 81 are connected by a supply pipe 20. The supply pipe 20 is, for example, a rubber bellows pipe and has flexibility.

  A drain port 67 (see FIG. 16) is provided at the lowermost part of the outer tub 2. The drain port 67 is connected to a drain pump (not shown) via a drain pipe 68 (see FIG. 16), and the washing water in the outer tub 2 is discharged from the drain port 67 through the drain pipe 68 to the outside of the machine. It is configured to be discharged.

  Further, a water supply hose connection port 8 from a water tap is provided on the upper left side of the back surface of the housing 1. The water supply hose connection port 8 is connected to a water supply valve device 9, and the water supply valve device 9 includes a first electromagnetic valve 9a and a second electromagnetic valve 9b. The first electromagnetic valve 9a and the second electromagnetic valve 9b are connected to the liquid supply unit 10 via hoses 21 and 22, respectively.

  As shown in FIG. 4, an outer tank cover 66 is attached to the front end of the outer tank 2. An opening 66 a is provided on the front end surface of the outer tub cover 66, and the outer tub 2 is sealed with water by closing the door 7. The base 1 f includes a fixing member 1 h to which a connecting portion 5 a provided at the lower portion of the damper 5 that supports the outer tub 2 is fixed.

Next, the liquid supply unit 10 will be described.
<Liquid supply unit>
FIG. 5 is an enlarged perspective view of the liquid supply unit. FIG. 6 is an enlarged view showing the appearance of the liquid supply unit, where (a) is a plan view and (b) is a front view. FIG. 7 is a perspective view showing a state in which the detergent box is mounted between the detergent case and the shower case.

  As shown in FIG.5 and FIG.6, the liquid supply unit 10 is provided with the detergent case 11, the detergent box 12, and the shower case (water supply part) 13, for example, is resin. An outlet 14 (see FIG. 6B) communicating with the inside of the outer tub 2 is formed on the bottom surface of the detergent case 11, and a supply pipe 20 (see FIGS. 2 and 3) is connected to the outlet 14. Has been. The tray portion 22 (see FIG. 7) of the detergent box 12 is disposed in the detergent case 11 so that it can be pulled out from the front opening 15 (see FIG. 7) of the detergent case 11. The shower case 13 is configured to supply the water sent through the hoses 21 and 22 (see FIG. 3) to the upper surface of the detergent box 12 like a shower.

  As shown in FIG. 7, the detergent box 12 is mounted in the detergent case 11 through the front opening 15 opened in the front surface of the detergent case 11. The detergent box 12 includes a door portion 21 that can close the front opening 15 of the detergent case 11, and a tray portion 22 that is a portion that extends rearward from the rear surface of the door portion 21 and into which detergent or the like is introduced. On the front surface of the door portion 21, an operation portion 23 is formed for a user to put his / her finger into and out of the detergent box 12. A pair of left and right flange-shaped guides 24, 24 extending in the front-rear direction are formed on the left and right sides of the upper portion of the tray portion 22, and the detergent box 12 has the detergent case 11 and the shower case 13 by the guides 24, 24. Supported between.

<Detergent case>
FIG. 8 is an exploded perspective view of the detergent case and the shower case.
As shown in FIG. 8, the detergent case 11 is formed with an upper surface opening 16 opened on the upper surface. The shower case 13 is attached to the upper side of the detergent case 11 so as to cover the upper surface opening 16. At this time, the plurality of claw portions 18 provided on the left and right outer surfaces of the upper portion of the detergent case 11 engage with the plurality of engagement holes 17 provided on the left and right outer surfaces of the shower case 13, respectively. Is fixed to the detergent case 11 by a screw member 19. And the detergent case 11 and the shower case 13 are fixed to the housing | casing 1 through the structural member which is not shown in figure.

  The detergent case 11 has a bottom surface that is obliquely cut to prevent interference with the outer tub 2 (see FIG. 3), and the right side is shallow and the left side is deep when viewed from the front (front) (also the detergent box 12). The same). A notch 31 is provided on the rear side wall surface of the detergent case 11, and when the shower case 13 is set in the detergent case 11, the inflow portion 42 (see FIG. 10B) of the shower case 13 is fitted into the notch 31. Configured to match.

  The bottom surface of the detergent case 11 includes an inclined surface 32 that decreases from the right back side toward the near side, and an inclined surface 33 that decreases from the left front side toward the back side. The lower part of the inclined surface 33 on the back side is the lowest position on the bottom surface of the detergent case 11, and the outflow port 14 (see FIG. 2) is formed here. According to such a configuration, even if the detergent is dropped on the front bottom surface of the detergent case 11 in a state where the detergent box 12 is pulled out, the supplied water is moved along the inclined surface 32 to the front side of the detergent case 11. After being sent to the bottom surface, it is sent to the outlet 14 along the inclined surface 33 together with the detergent, so that it is avoided that the dropped detergent remains and accumulates at that position.

  A pair of left and right step-like guide rails 34 and 34 (the right guide rail is not shown) extending in the front-rear direction are formed on the left and right inner side surfaces of the detergent case 11. Then, the lower surfaces of the guides 24, 24 of the detergent box 12 are placed on the guide rails 34, 34, and the detergent box 12 is positioned in the downward direction and the left-right direction so that the detergent box 12 can be smoothly put in and out of the detergent case 11. It is configured as follows.

<Detergent box>
FIG. 9 is an enlarged view showing the appearance of the detergent box, where (a) is a plan view, (b) is a front view, and (c) is a right side view.

  As shown in FIG. 9, the tray section 22 of the detergent box 12 includes a detergent washing chamber 25 for main washing, a detergent loading chamber 26 for prewashing provided separately from the detergent washing chamber 25 for main washing, and Finishing agent charging chambers 27 are formed to extend in parallel from the back side to the front side in the direction in which the detergent box 12 is pulled out. The detergent washing chamber 25 for main washing is a feeding chamber for feeding a detergent used for main washing (here, powder detergent, the same applies hereinafter), and the detergent washing chamber 26 for pre-washing performs pre-washing. This is a loading chamber for loading detergent used for pre-washing when a course is selected. The finishing agent charging chamber 27 is a charging chamber for charging a finishing agent (liquid) used in the final rinsing to finish the laundry softly.

  The main-cleaning detergent charging chamber 25 and the pre-cleaning detergent charging chamber 26 have a box shape with an upper portion and a back side opened, and the bottom surface thereof is an inclined surface having a high front side and a low back side. Foreign matter passage prevention fences 25b and 26b are respectively provided on the slightly front side of the rear side edges 25a and 26a from which the detergent and water flow out in the detergent loading chamber 25 for main washing and the detergent loading chamber 26 for pre-washing. Yes. Further, at the upper part on the back side of the detergent box 12, there are provided reinforcing ribs 25c and 26c for suppressing deformation extending in the width direction (left-right direction).

  The finishing agent charging chamber 27 has a box shape with an open top. A finishing agent outflow chamber 27c is formed in the bottom surface of the finishing agent charging chamber 27 with the back side being partitioned by a partition wall 27b, and a siphon 28 is provided in the finishing agent outflow chamber 27c. The siphon 28 is composed of a siphon pipe (not shown) erected in the finishing agent outflow chamber 27c, and a siphon cap 28a placed on the siphon pipe. The finishing agent and water from the finishing agent outflow chamber 27c are configured to flow out from the back end edge 27a through an outlet (not shown) communicating with the siphon pipe.

  In the width direction orthogonal to the direction in which the detergent box 12 is pulled out, the finish agent charging chamber 27 is located between the main cleaning detergent charging chamber 25 provided on the left side and the pre-washing detergent charging chamber 26 provided on the right side. Is formed. If constituted in this way, as will be described later, it is possible to satisfactorily switch water supply in three directions toward the input chambers 25 to 27 using the two electromagnetic valves 9a and 9b in the water supply valve device 9.

  The front side edge 27d of the finishing agent charging chamber 27 is set to the back side of the front side edge 25d of the main washing detergent charging chamber 25 and the front side edge 26d of the prewashing detergent charging chamber 26. Yes. In addition, the detergent box 12 has a partition wall 29 that divides the front side of the detergent input chamber 25 for main washing and the front side of the detergent input chamber 26 for prewash, on the front end wall of the finishing agent input chamber 27. It extends from the outer surface toward the front side.

  If comprised in this way, compared with the case where the near side edge of the three input chambers 25-27 is arranged substantially the same, the opening width W1 of the front side of the detergent input chamber 25 for main washing, The opening width W2 on the near side of the detergent charging chamber 26 can be ensured widely. Further, since the partition wall 29 extends from the outer surface of the front side end wall of the finishing agent charging chamber 27 toward the front side, both the opening widths W1 and W2 can be widened in a balanced manner. Furthermore, the depth dimension L1 of the region having the wide opening widths W1 and W2 can be appropriately set as necessary. For example, it is preferable to set the depth dimension L1 to the same level as the opening widths W1 and W2.

<Shower case>
10A and 10B are enlarged perspective views of the shower case, in which FIG. 10A is a perspective view seen from above the right front side, and FIG. 10B is a perspective view seen from below the right back side. FIG. 11 is a plan view of the main body of the shower case. FIG. 12 is a perspective view of the main body of the shower case. FIG. 13 is a perspective view of the main body portion of the shower case cut along a plane along line XIII-XIII in FIG. 11.

  As shown in FIGS. 10 and 11, in the shower case 13, a plate-shaped cover member 41b covers the upper side of a box-shaped main body portion 41a having a bottom wall 41c in which sprinkling holes 45a, 46a, 47a are formed. It is attached and configured. The shower case 13 has a thin box-shaped water supply chamber 41 and an inflow portion 42 that extends downward from the back end of the water supply chamber 41 and is formed integrally with the water supply chamber 41.

  The inflow portion 42 is divided into two chambers with a partition wall 41d (see FIG. 11) inside, and inflow ports 43 and 44 to which hoses 21 and 22 (see FIG. 3) are respectively connected are opened in each chamber. ing.

  The water supply chamber 41 is partitioned into three chambers by a partition wall 41e (see FIG. 11). The water supply chamber 41 includes a main wash water supply chamber 45, a prewash water supply chamber 46, and a finishing agent water supply chamber 47. Yes. The main washing water supply chamber 45 is formed on the left side of the shower case 13 and is located above the detergent washing chamber 25 for main washing of the detergent box 12, and has a plurality of water spray holes 45a on the bottom surface. . The pre-wash water supply chamber 46 is formed on the right side of the shower case 13 and is located above the pre-wash detergent loading chamber 26 of the detergent box 12, and has a plurality of water spray holes 46a on the bottom surface. . The finishing agent water supply chamber 47 is formed near the center in the width direction of the shower case 13 and is located above the finishing agent charging chamber 27 of the detergent box 12, and has a plurality of water spray holes 47a on the bottom surface. . In the detergent box 12, the inner diameters of the water spray holes 45a, 46a, 47a located above the place where the detergent tends to accumulate are set larger than those of the other places.

  When the first electromagnetic valve 9a (see FIG. 3) is turned on (opened), the water sent from the water supply hose connection port 8 through the first electromagnetic valve 9a flows into the inflow portion 42 from the inlet 43, It is configured to be discharged toward the P direction (see FIGS. 10A and 11) and sent to the main washing water supply chamber 45. When the second electromagnetic valve 9b (see FIG. 3) is turned on (opened), the water sent from the water supply hose connection port 8 through the second electromagnetic valve 9b flows into the inflow portion 42 from the inflow port 44. Thereafter, the water is discharged in the Q direction and sent to the pre-wash water supply chamber 46. On the other hand, when the first electromagnetic valve 9a and the second electromagnetic valve 9b are simultaneously turned on (opened), the water sent from the water supply hose connection port 8 through the electromagnetic valves 9a and 9b flows into the inlet 43 and the flow respectively. After flowing into the inflow portion 42 from the inlet 44, it is discharged simultaneously in the P direction and the Q direction, and both collide with each other and the flow direction changes to the R direction (forward) corresponding to the intermediate between the P direction and the Q direction. And is sent to the finishing agent water supply chamber 47. In this way, the water supply in three directions can be switched using the two solenoid valves 9a and 9b.

  A pair of left and right guide restricting portions 48 extending in the front-rear direction are formed on the left and right sides of the lower surface of the shower case 13. And the guides 24 and 24 of the detergent box 12 are located under the guide restricting parts 48 and 48, and the detergent box 12 is positioned upward and restricts upward movement.

  Here, when time passes with the water remaining in the shower case 13 when the water supply is stopped, mold may occur in the shower case 13. As a countermeasure, in this embodiment, as shown in FIGS. 11 to 13, a concave groove 45 b that connects at least two of the plurality of water spray holes 45 a and 46 a to the upper surface of the bottom wall 41 c of the shower case 13. , 46b are formed.

  If comprised in this way, the water which remains in the shower case 13 will flow into the ditch | groove 45b, 46b, will aggregate by surface tension, and will be discharged | emitted from the water spray holes 45a, 46a connected to the ditch | groove 45b, 46b. . Thereby, the amount of residual water in the shower case 13 can be reduced, and generation | occurrence | production of the mold in the shower case 13 can be suppressed.

  Moreover, it is preferable to form the ditch | grooves 45b and 46b so that it may connect with the water spray holes 45a1 and 46a1 which have a comparatively big internal diameter among the water spray holes 45a and 46a. If it does in this way, it will become easy for the condensed water | moisture content to fall with dead weight from the water spray holes 45a1 and 46a1. The bottom wall 41c of the finishing agent water supply chamber 47 is formed with an inclined surface that is slightly inclined with respect to the horizontal plane, although it is difficult to grasp in the drawing. It is configured to reduce the amount of residual water.

Next, the structure around the water seal trap will be described.
<Surrounding structure of water seal trap>
FIG. 14 is a perspective view of the outer tub to which the water seal trap portion is attached as viewed from the rear upper side. FIG. 15 is a perspective view showing a state in which the cover of the water seal trap portion shown in FIG. 14 is removed.

  As shown in FIGS. 14 and 15, a water-sealed trap portion 81 in which a water storage chamber 82 (see FIG. 15) for storing water is formed connects the liquid supply unit 10 (see FIG. 3) and the outer tub 2. It is provided on the road. The water-sealed trap portion 81 includes a main body portion 83 and a cover 84 that covers the main body portion 83 in a liquid-tight manner, and the main body portion 83 and the cover 84 are coupled to each other by heat welding or adhesion. A water storage chamber 82 is formed.

  The downstream side of the water seal trap portion 81 is connected to a water supply port 2 a formed in the bottom wall 2 b of the outer tub 2. Here, the main body portion 83 of the water seal trap portion 81 has an inlet 83a connected to the supply pipe 20 and an outlet 83b connected to the water supply port 2a formed in the bottom wall 2b of the outer tub 2. Yes. That is, although the outlet 83b of the water-sealed trap part 81 is directly connected to the water supply port 2a of the outer tub 2, it is not limited to this, and the water supply port 2a of the outer tub 2 is not limited to this. It may be connected to.

  The water storage chamber 82 formed in the main body 83 is separated by a partition plate 83c that hangs downward from the upper wall of the main body 83, between the passage on the downstream side of the inlet 83a, the partition plate 83c, and the lower wall of the main body 83. And a substantially U-shaped passage composed of a passage on the upstream side of the outlet 83b. Accordingly, when water supply is stopped, water is stored in the water storage chamber 82, and the passage between the partition plate 83c and the lower wall of the main body 83 is filled with water to seal water vapor.

  As described above, this embodiment includes the water-sealed trap portion 81 provided with the water storage chamber 82 that is provided in the flow path connecting the liquid supply unit 10 and the outer tub 2 and stores water. A downstream side of the trap portion 81 is connected to a water supply port 2 a formed on the bottom wall 2 b of the outer tub 2.

According to such a configuration, the pressurized air generated in the radially outward direction of the side wall of the drum 3 when the drum 3 rotates at high speed during dehydration is supplied to the water supply port 2a formed in the bottom wall 2b of the outer tub 2. There is almost no entry. Therefore, the water stored in the water storage chamber 82 of the water-sealed trap part 81 is not discharged, and the sealing function by the stored water is reliably maintained.
And since the discharge of the water stored in the water storage chamber 82 can be suppressed without increasing the depth of the water storage chamber 82, the size of the water seal trap part 81 does not increase.
That is, it is possible to provide the drum type washing machine S that can suppress the water vapor in the outer tub 2 from entering the liquid supply unit 10 even when the drum 3 rotates at a high speed without increasing the size of the water seal trap portion 81.

  Furthermore, the liquid containing water, detergent, bleaching agent, etc. flowing out from the outlet 83b of the water seal trap part 81 is directly guided to the lower part of the outer tub 2 from the water supply port 2a formed in the bottom wall 2b of the outer tub 2. . Therefore, it is possible to prevent the liquid from flowing into the drum 3 when supplying the liquid containing water, detergent, bleach or the like into the outer tub 2. As a result, it is possible to prevent the occurrence of color fading and color unevenness caused by a high concentration liquid (raw solution) of a detergent or bleach directly touching the laundry.

Next, the structure of the drainage backflow prevention unit will be described.
<Drainage prevention part of drainage>
FIG. 16 is a partial cross-sectional perspective view of the vicinity of the drainage backflow prevention unit. FIG. 17 is a view showing a seal body of the backflow prevention unit, in which (a) is a perspective view, (b) is a front view, and (c) is a longitudinal sectional view.

  As shown in FIG. 16, a backflow prevention unit 85 for preventing the backflow of water from the outside to the drainage port 67 of the outer tub 2 is provided in the flow path connected to the drainage port 67 provided at the lower part of the outer tub 2. It has been. That is, the backflow prevention unit 85 is disposed in the flow path between the drain pipe 68 connected to the upstream side of the drain pump (not shown) and the drain port 67 of the outer tub 2.

  The backflow preventing portion 85 includes a partition portion 86 formed with a hole portion 86a through which water passes, a spherical seal body 87 that is disposed below the hole portion 86a and floats on water to close the hole portion 86a, and a hole portion. And a seal body accommodating chamber 88 which is formed below 86a and accommodates the seal body 87. The seal body 87 is freely movable in the seal body accommodation chamber 88.

  The drain pipe 68 is, for example, a rubber bellows pipe and has flexibility. Here, the wall part of the seal body accommodating chamber 88 of the backflow prevention part 85 and the partition part 86 are made of rubber, and are formed integrally with the drain pipe 68.

  As shown in FIG. 17, the seal body 87 includes a first member 87a and a second member 87b having a substantially hemispherical shape made of, for example, resin, which are combined with each other. The opening ends of the first member 87a and the second member 87b are joined to each other by heat welding, adhesion, or the like, thereby forming a space in which buoyancy is generated.

  Here, when water flows into the backflow prevention unit 85 from the outside and the seal body 87 floats on the water and closes the hole 86a, the joint surface 87c between the first member 87a and the second member 87b is a seal. When a free posture can be taken in the body accommodating chamber 88, there is a possibility that the edge of the hole 86a may be contacted. In this case, since the outer surface of the joint surface 87c is not necessarily formed in an ideal spherical shape, a gap is formed between the hole 86a and the seal body 87, and the drain port 67 of the outer tub 2 passes through this gap. There is a risk of water flowing back.

  As a countermeasure, in this embodiment, the average mass per unit volume of the second member 87b is set larger than that of the first member 87a. Specifically, for example, a metal weight 89 is fixed inside the second member 87b by screw fastening or the like. However, the method of making the average mass of the second member 87b larger than that of the first member 87a is not limited to this. For example, the thickness of at least a part of the second member 87b is set to the first thickness. It may be larger than the member 87a. The bottom portion of the second member 87b is formed flat, and the bottom portion of the second member 87b is stably seated on the lower wall of the seal body accommodating chamber 88 except during levitation. .

  According to such a configuration, when the seal body 87 floats on the water and closes the hole 86a, the seal body 87 is always in a posture in which the first member 87a is on the top and the second member 87b is on the bottom. I take the. Therefore, the joint surface 87c between the first member 87a and the second member 87b does not come into contact with the edge of the hole 86a, thereby creating a gap between the hole 86a and the seal body 87. It is possible to reliably prevent water from flowing back to the drain port 67 of the outer tub 2 from the outside.

Next, the peripheral structure of the bearing of the rotating shaft 65 will be described.
<Structure around the bearing of the rotating shaft>
FIG. 18 is an enlarged cross-sectional view of the periphery of the bearing support portion that supports the bearing of the rotating shaft.

  As shown in FIG. 18, the rotating shaft 65 penetrating the outer tub 2 includes a shaft portion 65 a formed with a shaft spline portion 65 c to which a rotational driving force is input from the motor 4 (see FIG. 4, the same applies hereinafter) A mounting flange 65b provided at the front portion of the shaft portion 65a and coupled to the drum 3 (see FIG. 4, the same applies hereinafter) by screw fastening or the like is provided. Here, the rotational driving force of the motor 4 is configured to be directly input to the shaft spline portion 65c. However, the present invention is not limited to this. For example, via a driving force transmission member such as a pulley and a belt. It may be entered.

  A pair of bearings 69 are disposed on the outer peripheral surface side of the rotating shaft 65, and a bearing support portion 70 that supports the bearing 69 is fixed to the outer tub 2. The bearing support portion 70 includes a cylindrical portion 70 a and a disk-shaped flange portion 70 b extending radially outward from the cylindrical portion 70 a, and the flange portion 70 b is screwed to the back surface of the outer tub 2. It is fixed by etc. Here, the bearing 69 is a ball bearing.

  In addition, a seal portion 73 that covers the bearing 69 is disposed on the drum 3 side of the bearing 69. The seal portion 73 is in contact with the bearing support portion 70 on the outer peripheral surface side, and on the rotary shaft 65 on the inner peripheral surface side. In contact. The seal portion 73 seals between the outer tub 2 and the rotary shaft 65, but in order to reduce the loss torque (motor load) of the motor 4 and prevent the seal portion 73 from being worn, The contact pressure (tightening margin) of the seal portion 73 with respect to the shaft 65 is reduced. For this reason, there is a possibility that the bearing 69 may be rusted due to moisture entering the space between the seal portion 73 and the bearing 69 due to long-term use and water collecting. As a countermeasure against this, it is conceivable to use a bearing with a seal. However, since a bearing with a seal is expensive, here, a path 73a for releasing moisture to the outside of the outer tub 2 is provided in the seal portion 73 itself. ing.

FIG. 19 is an enlarged cross-sectional view of the periphery of a bearing support portion according to a modification that supports the bearing of the rotating shaft.
The bearing support portion 72 according to the modification shown in FIG. 19 includes a cylindrical portion 72a and a disk-shaped flange portion 72b extending radially outward from the cylindrical portion 72a. The outer tub 2 is integrally formed by insert molding. Here, the outer tub 2 is formed from a resin such as PP (polypropylene), for example.

  In the bearing support portion 72 according to the modified example, the flange portion 72b is insert-molded integrally with the outer tub 2, and therefore the same seal portion 73 as in FIG. 18 cannot be used. Therefore, a normal seal portion 74 that does not have a path for releasing moisture is used, and a communication hole 76 that communicates from the space 75 surrounded by the seal portion 74, the rotating shaft 65, and the bearing 69 to the outside of the outer tub 2 is provided as a bearing. It is provided on the support portion 72. In addition, the number of the communicating holes 76 should just be one or more, and can be set suitably.

  According to such a configuration, even when the flange portion 72b of the bearing support portion 72 is insert-molded integrally with the outer tub 2, moisture can be released from the space 75 by the communication hole 76, and the bearing 69 is rusted. Can be suppressed. And since the flange part 72b is insert-molded integrally with the outer tank 2, the fastening force of the flange part 72b and the outer tank 2 improves. As a result, the flange portion 72b of the bearing support portion 72 can be reduced in weight, and since there is no need for screw fastening, the screw member and the screw fastening operation can be reduced, and the cost can be reduced.

Next, the aperture shapes of the side plates 1a and 1b of the housing 1 will be described.
<Drawing shape of side plate>
20A is a view of the side plate viewed from the outside in a direction perpendicular to the surface thereof, and FIG. 20B is a perspective view of the side plate shown in FIG. In the description with reference to FIGS. 20A and 20B, the directions of “right” and “left” indicate directions when the side plate is viewed from the outside in a direction perpendicular to the surface thereof.

The side plates 1a and 1b of the drum-type washing machine S are made of steel plates, and normally, for example, in order to suppress vibration during dehydration, a diaphragm shape having irregularities for increasing rigidity is formed. There is a demand for improved rigidity.
Therefore, in the present embodiment, as shown in FIG. 20, the side plates 1 a and 1 b each have a diamond-shaped first recess 77 that is recessed toward the inside of the housing 1 and a chevron formed above the first recess 77. A second recess 78 and a third recess 79 having a valley shape formed below the first recess 77 are provided. Here, the intervals between the first recess 77, the second recess 78, and the third recess 79 are set to be the same.

  The first concave portion 77 includes an upper left inclined wall portion 77a extending upwardly inclined from the left end toward the center, an upper right inclined wall portion 77b extending inclined upward from the right end toward the center, and the left end Lower left inclined wall 77c extending downward from the right side toward the center, right lower inclined wall 77d extending downward from the right end toward the center, upper left inclined wall 77a, upper right inclined wall A bottom 77e surrounded by a portion 77b, a lower left inclined wall 77c, and a lower right inclined wall 77d. The angle α1 formed by the upper left inclined wall portion 77a and the upper right inclined wall portion 77b and the angle α2 formed by the lower left inclined wall portion 77c and the lower right inclined wall portion 77d are determined by the upper left inclined wall portion and the lower left inclined wall portion. It is set larger than the angle β1 formed and the angle β2 formed by the upper right inclined wall 77b and the lower right inclined wall 77d.

  The second recess 78 has an upper left inclined recess 78a that extends upward from the left end toward the center, and an upper right inclined recess 78b that extends upward from the right end toward the center. The third recess 79 includes a lower left inclined recess 79a that extends downward from the left end toward the center and a lower right inclined recess 79b that extends downward from the right end toward the center. Have. An angle α3 formed by the upper left inclined concave portion 78a and the upper right inclined concave portion 78b and an angle α4 formed by the lower left inclined concave portion 79a and the lower right inclined concave portion 79b are angles formed by the upper left inclined wall portion 77a and the lower left inclined wall portion 77c. It is set larger than β1 and an angle β2 formed by the upper right inclined wall 77b and the lower right inclined wall 77d. The angles α3 and α4 are angles formed on the side facing the first recess 77. Here, α1 = α2 = α3 = α4 and β1 = β2 are set.

21A is a view of the side plate according to the comparative example as viewed from the outside in the direction perpendicular to the surface thereof, and FIG. 21B is a perspective view of the side plate according to the comparative example shown in FIG. .
As shown in FIG. 21, the side plate 1 i according to the comparative example is concentrically above the two first concavities 80 a and 80 b and two concentric first concavities 80 a and 80 b that are recessed to the inside of the housing 1. An arcuate second recess 80c is formed, and an arcuate third recess 80d formed concentrically below the first recesses 80a and 80b.

  The maximum deformation amount when a vertical load inward of the housing 1 is added to the center of the side plates 1a and 1b of the present embodiment is the maximum deformation in the case of the side plate 1i according to the comparative example shown in FIG. The result was a reduction of about 17% with respect to the amount. Further, the side plates 1a and 1b according to the present embodiment are more deformed than a side plate (not shown) formed with a plurality of (for example, four) recesses extending in the longitudinal direction (vertical direction) as another comparative example. The result was that the amount was further significantly reduced.

  According to such a configuration of the present embodiment, the maximum deformation amount of the side plates 1a and 1b of the housing 1 can be reduced, and the rigidity of the housing 1 is improved. Therefore, for example, vibration during dehydration can be suppressed.

Next, the variable structure according to the washing capacity will be described.
<Variable structure according to washing capacity>
FIG. 22 is a longitudinal sectional view of another drum type washing machine having different washing capacities.

  The drum type washing machine Sa shown in FIG. 22 has a smaller washing capacity than the drum type washing machine S shown in FIG. Specifically, the drum-type washing machine Sa has a drum 103 (the radial dimension is the same) whose axial length is shorter than that of the drum 3 (see FIG. 4) and an outer tub cover 66 (see FIG. 4). 4) and an outer tub cover 166 having the same axial length as that of the rear cover 101d (see FIG. 4) and a rear cover 101d having a shorter axial length than that of the rear cover 1d (see FIG. 4). The same). Note that the position of the outer tub 2 moves forward as the axial length of the outer tub cover 66 becomes shorter, but the fixing member 1h of the connecting portion 5a provided at the lower portion of the damper 5 that supports the outer tub 2 is used. It is possible to cope with this by shifting the fixing position by a screw member or the like.

  Other parts such as the outer tub 2 and the base 1f are configured such that the parts of the drum type washing machine S can be used in common. Therefore, it is not necessary to change the outer tub 2, the base 1f, and the like, so that it is not necessary to manufacture a new mold. Further, the back cover 1d and the back cover 101d can be easily adjusted depending on the depth of the diaphragm.

  That is, in the drum type washing machines S and Sa of the present embodiment, the drums 3 and 103 are drum groups having a plurality of types of drums having different axial lengths according to the washing capacity of the drum type washing machines S and Sa. The outer tank covers 66 and 166 and the back covers 1d and 101d are an outer tank cover group having a plurality of types of outer tank covers having different axial lengths, and an axial length. Each of the back cover groups having different types of back covers is selected so that the axial length when the washing capacity is small is shorter than the axial length when the washing capacity is large. is set up.

  According to such a configuration, the drum-type washing machines S and Sa having different washing capacities can be configured by changing the drums 3 and 103, the outer tub covers 66 and 166, and the back covers 1d and 101d. Therefore, the drum-type washing machine Sa having a small washing capacity can be made compact by making the depth dimension (front-rear direction dimension) smaller than that of the drum-type washing machine S having a large washing capacity. Moreover, according to such a variable structure corresponding to the washing capacity, it is possible to easily change the washing capacity and reduce the investment cost when it is changed.

Next, the operation of the drum type washing machine S configured as described above will be described.
<Operation of drum type washing machine>

  At the time of washing, when the user first holds the operation portion 23 of the door portion 21 of the detergent box 12 and pulls it toward the front side, the tray portion 22 of the detergent box 12 is pulled out from the front opening 15 of the detergent case 11 (see FIG. 1 and FIG. 7).

  Subsequently, the user throws the detergent into the detergent washing chamber 25 for main washing. When the course for pre-washing is selected, the user similarly puts the detergent into the pre-wash detergent loading chamber 26 as well. Hereinafter, the case where pre-washing is performed will be described. If necessary, a bleaching agent is added to the detergent. Further, the user inputs the finishing agent into the finishing agent charging chamber 27. When the introduction of the detergent and the finishing agent is completed, the user pushes the door portion 21 of the detergent box 12 into the back side and stores the tray portion 22 in the detergent case 11.

  When the washing process is started, first, pre-washing is performed. That is, the second electromagnetic valve 9b of the water supply valve device 9 is turned on (opened) (see FIG. 3), and the water from the water supply hose connection port 8 is sent in the Q direction in the shower case 13, so 46 (see FIG. 11). Water flows down from the plurality of water spray holes 46a provided in the bottom wall of the pre-wash water supply chamber 46 to the pre-wash detergent input chamber 26 of the detergent box 12 and is uniformly sprinkled, and the detergent there is used as a detergent case. 11 is poured into. Then, water together with the detergent passes through the outlet 14 of the detergent case 11, passes through the supply pipe 20, and is supplied into the outer tub 2 from the water supply port 2 a of the outer tub 2 through the water seal trap portion 81 (see FIG. 15). (See FIG. 15).

  Since the liquid containing water, detergent, bleaching agent and the like flowing out from the outlet 83b of the water-sealed trap part 81 is directly guided from the water supply port 2a formed in the bottom wall 2b of the outer tank 2 to the lower part of the outer tank 2, The liquid does not flow into the drum 3. As a result, the occurrence of color fading and color unevenness caused by direct contact of the laundry or the high concentration liquid (raw solution) of the bleach with the laundry is prevented.

  When water is supplied to the specified water level in the outer tub 2 and the washing water is accumulated, the drum type washing machine S rotates the drum 3 by the motor 4 and starts pre-washing the laundry.

  When washing is performed using relatively high-temperature water, a large amount of water vapor is generated in the outer tub 2, but the water stored in the water storage chamber 82 of the water-sealed trap portion 81 causes water vapor in the outer tub 2 to flow. The entry into the outlet 14 of the liquid supply unit 10 is suppressed.

  When the pre-washing is completed, the drum type washing machine S opens a drain valve (not shown), drains the washing water in the outer tub 2, rotates the drum 3, and performs centrifugal dehydration.

  At the time of dehydration, the drum 3 rotates at a high speed, and the air existing radially outward of the side wall of the drum 3 is pressurized. This pressurized air is supplied to the water supply formed on the bottom wall 2b of the outer tub 2. There is almost no entry into the mouth 2a. For this reason, the water stored in the water storage chamber 82 of the water-sealed trap part 81 is not discharged, and the sealing function is reliably maintained.

  In the present embodiment, the side plates 1a and 1b of the housing 1 are formed with a throttle shape (first concave portion 77, second concave portion 78, and third concave portion 79) for improving rigidity (see FIG. 20). Vibration during dehydration is suppressed.

  Subsequently, main washing is performed. That is, the first electromagnetic valve 9a of the water supply valve device 9 is turned on (opened) (see FIG. 3), and water from the water supply hose connection port 8 is sent in the direction P in the shower case 13 to supply the main washing water supply chamber. 45 (see FIG. 11). Water flows down from the plurality of sprinkling holes 45a provided in the bottom wall of the main wash water supply chamber 45 to the main wash detergent input chamber 25 of the detergent box 12, and is uniformly sprinkled. 11 is poured into. Then, water together with the detergent passes through the outlet 14 of the detergent case 11, passes through the supply pipe 20, and is supplied into the outer tub 2 from the water supply port 2 a of the outer tub 2 through the water seal trap portion 81.

  When the water is supplied to the specified water level in the outer tub 2 and the washing water is accumulated, the drum-type washing machine S rotates the drum 3 by the motor 4 and starts the main washing of the laundry. When the main washing is completed, the drum type washing machine S opens a drain valve (not shown), drains the washing water in the outer tub 2, rotates the drum 3, and performs centrifugal dehydration. The action in dehydration after main washing and after main washing is substantially the same as the action in dehydration after pre-washing and pre-washing described above.

  Subsequently, a rinsing step is performed. First, for example, the first electromagnetic valve 9a of the water supply valve device 9 is turned on (opened) (see FIG. 3), and the water from the water supply hose connection port 8 is supplied from the detergent input chamber 25 for the main washing of the detergent box 12, the detergent. It is supplied into the outer tub 2 through the case 11. At this time, the detergent in the detergent input chamber 25 for main washing has already been washed away and does not exist.

  When the water is supplied to the specified water level in the outer tub 2 and the washing water is accumulated, the drum type washing machine S rotates the drum 3 by the motor 4 and starts rinsing the laundry. Rinsing is usually performed 2-3 times.

  In the final rinse, the first electromagnetic valve 9a and the second electromagnetic valve 9b of the water supply valve device 9 are simultaneously turned on (opened) (see FIG. 3), and the water from the water supply hose connection port 8 flows into the shower case 13 , In the R direction, and flows into the finishing agent water supply chamber 47 (see FIG. 11). Here, when the first solenoid valve 9a and the second solenoid valve 9b are simultaneously turned on (opened), the water discharged in the P direction and the water discharged in the Q direction collide, and the flow direction is the R direction. It can be changed to (forward). In this case, even if water slightly flows in the P direction or the Q direction, the detergent that has been put in the detergent washing chamber 25 for main washing or the detergent feeding chamber 26 for pre-washing is already washed away with water. So there is no problem.

  Water flows down from the plurality of sprinkling holes 47a provided in the bottom wall of the finishing agent water supply chamber 47 to the finishing agent charging chamber 27 of the detergent box 12 and is uniformly sprinkled. By diluting the finishing agent stored in the finishing agent charging chamber 27 with water to raise the water level, water flows out from the siphon pipe of the siphon 28 together with the finishing agent by the siphon action, and is poured into the detergent case 11. Then, water together with the finishing agent passes through the outlet 14 of the detergent case 11, passes through the supply pipe 20, and is supplied into the outer tub 2 from the water supply port 2 a of the outer tub 2 through the water seal trap portion 81.

  When the rinsing process is completed, the drum type washing machine S drains the washing water in the outer tub 2, rotates the drum 3 to perform centrifugal dehydration, and finishes the washing.

  Here, backflow of water from the outside to the drainage port 67 of the outer tub 2 is prevented by the action of the backflow prevention unit 85. In the present embodiment, the seal body 87 is in a state where the first member 87a is always on and the second member 87b is on the bottom, and the seal body 87 floats on the water and closes the hole 86a. . For this reason, the joining surface 87c of the seal body 87 does not come into contact with the edge of the hole 86a, so that no gap is generated, and water is reliably prevented from flowing back to the drain port 67 of the outer tub 2 from the outside.

  In addition, a communication hole 76 that communicates from the space 75 surrounded by the seal portion 74, the rotation shaft 65, and the bearing 69 to the outside of the outer tub 2 is provided in the bearing support portion 72 that supports the bearing 69 installed on the rotation shaft 65. According to the configuration (see FIG. 19), moisture can be released from the space 75 by the communication hole 76, and the bearing 69 is suppressed from being rusted.

  Further, since water remaining in the shower case 13 after the washing is finished is discharged from the water spray holes 45a and 46a through the concave grooves 45b and 46b, the amount of remaining water in the shower case 13 can be reduced, and mold is generated. Is suppressed.

As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to the structure described in the said embodiment, Including suitably combining thru | or selecting the structure described in embodiment, The configuration can be changed as appropriate without departing from the spirit of the invention.
For example, in the above-described embodiment, the drum-type washing machines S and Sa that do not have a drying function have been described. However, the present invention is not limited to this, and is also applicable to a drum-type washing machine that has a drying function. Is possible.

DESCRIPTION OF SYMBOLS 1 Case 1a, 1b Side plate 1c Front cover 1d, 101d Rear cover 1e Top cover 1f Base 1g Input port 2 Outer tank 2a Water supply port 2b Bottom wall 3,103 Drum 4 Motor 10 Liquid supply unit 11 Detergent case 12 Detergent box (detergent Input section)
13 Shower case (water supply part)
14 Outlet 20 Supply pipe 41c Bottom wall 45b, 46b Concave groove 45a, 46a Sprinkling hole 65 Rotating shaft 66, 166 Outer tank cover 67 Drain port 69 Bearing 72 Bearing support part 74 Seal part 75 Space 76 Communication hole 77 1st recessed part 77a Upper left inclined wall portion 77b Upper right inclined wall portion 77c Lower left inclined wall portion 77d Lower right inclined wall portion 78 Second concave portion 78a Upper left inclined concave portion 78b Upper right inclined concave portion 79 Third concave portion 79a Lower left inclined concave portion 79b Lower right inclined concave portion 81 Water seal trap portion 82 Water storage chamber 83a Inlet 83b Outlet 85 Backflow prevention part 86a Hole 87 Seal body S, Sa Drum-type washing machine

Claims (1)

A drum capable of accommodating laundry;
An outer tub in which the drum is disposed;
A front cover having a slot for taking in and out laundry, left and right side plates, a back cover and a top cover; and a housing for supporting the outer tub,
The side plate includes a first recess, a second recess formed above the first recess, and a third recess formed below the first recess, each recessed to the inside of the housing.
The first recess includes an upper left inclined wall portion that extends upwardly from the left end toward the center, an upper right inclined wall portion that extends upward from the right end toward the center, and from the left end. A lower left inclined wall portion that is inclined and extended downward toward the center, a lower right inclined wall portion that is inclined and extended downward from the right end toward the center, the upper left inclined wall portion, and the upper right inclined wall portion. And a bottom part surrounded by the lower left inclined wall part and the lower right inclined wall part,
The angle formed by the upper left inclined wall portion and the upper right inclined wall portion, and the angle formed by the lower left inclined wall portion and the lower right inclined wall portion are the angles formed by the upper left inclined wall portion and the lower left inclined wall portion. And larger than the angle formed by the upper right inclined wall portion and the lower right inclined wall portion,
The second concave portion has an upper left inclined concave portion that extends upward from the left end toward the center, and an upper right inclined concave portion that extends upward from the right end toward the center, and
The third recess has a lower left inclined recess that extends downward from the left end toward the center, and a lower right inclined recess that extends downward from the right end toward the center,
The angle formed by the upper left inclined recess and the upper right inclined recess, and the angle formed by the lower left inclined recess and the lower right inclined recess are the angle formed by the upper left inclined wall and the lower left inclined wall, and the upper right A drum-type washing machine having a larger angle than an angle formed by an inclined wall portion and the lower right inclined wall portion .

Images