JP2009039421A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher which can save the operation power to close the inner lid while ensuring the water-tightness. <P>SOLUTION: The dishwasher comprises: an elastic seal member 2 located along the position corresponding the upper end of the opening 11 on the opposing surface of the washing tank 1 of the inner lid 5; and a seal member contacting surface 16 which is formed along the upper end of the opening 11, contacting the elastic seal member 2 when the inner lid 5 covers the opening 11, wherein the length from the seal member contacting surface 16 to the lower end of the engaging part is shorter at the corner than at the linear region of the rectangle shaped inner lid 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dishwasher having a washing tub provided so as to be able to be drawn out from a main body case.

A dishwasher having a washing tub provided so as to be drawable with respect to the main body case is mainly built under a kitchen counter. This dishwasher draws out the washing tank and stores the dishes to be washed, and when the washing tank is returned to the main body case, it is shielded in a watertight manner by the inner lid and then the washing water fed by the pump is sprayed onto the dishes. To wash. Therefore, in order to shield the washing tank and the inner lid in a watertight manner, a seal member is disposed between them. As an example of the sealing member provided between the cleaning tank and the lid, one described in Patent Document 1 below is disclosed.
JP 2001-292948 A

  The structure described in Patent Document 1 is a lip that does not sacrifice the watertight performance between the cleaning tank and the lid while reducing the operating force compared to a general hollow seal member. An excellent sealing member having a shape is proposed.

However, a new problem has been discovered as a sealing member of a built-in dishwasher, and a phenomenon has been found that causes a problem more remarkably particularly in the lip-shaped structure described in Patent Document 1. Specifically, the seal member employed in the built-in dishwasher is formed in an annular rectangular shape on the lower surface of the inner lid, similarly to the seal contact surface formed on the periphery of the opening of the cleaning tank opened in a rectangular shape. Sealing is performed in a watertight manner by contacting the attached sealing member. For this reason, in particular, in the corner portion of the sealing member arranged in a rectangular shape, it is necessary to deform the sealing member so as to follow the corner. The sealing force was reduced at the part. This phenomenon has become prominent because the lip-shaped seal member has a structure that is more easily deformed with respect to the deformation along the corner.
In order to solve this problem, it is effective to increase the sealing force by strongly pressing the sealing member against the cleaning tank, but this measure increases the operating force and deteriorates operability. As the force increases, there is a problem that the seal member is cracked or worn. Also, as a method of ensuring sealing performance without increasing the pressing force, it is not necessary to make long corner seals in advance or to generate deformation so that the sealing performance does not deteriorate against deformation along the corner. In this way, a structure in which the seal member itself is molded into an annular rectangular shape in advance is conceivable. However, this measure causes a problem that the manufacturing cost becomes extremely high as compared with a general extrusion molding seal member.

  The present invention ensures high watertight performance without increasing the operating force or damaging the seal even if the sealing member provided on the inner lid of the built-in dishwasher is molded by general extrusion molding etc. An object of the present invention is to provide a dishwasher that can be used.

The dishwasher according to the present invention includes a cleaning tank having a rectangular opening formed in an upper part thereof, a main body case provided with the cleaning tank so that the cleaning tank can be pulled out, and the cleaning tank stored in the main body case. In this case, the dishwasher includes a rectangular inner lid that is supported so as to be movable up and down with respect to the main body case so as to close the opening and shield it in a watertight manner. A rectangular sealing member abutting surface formed in a rectangular shape along the periphery of the opening at the upper end of the tank, and a rectangular shape formed at a position facing the sealing member abutting surface of the inner lid and upward A fitting groove formed as a recessed groove, and an elastic seal member fixed to the inner lid by being fitted into the fitting groove;
And the elastic seal member protrudes downward integrally from a fitting portion fitted in the fitting groove and a lower end portion of the fitting portion, and a lower portion thereof abuts on the seal member abutting surface. A seal portion configured to perform sealing, and at least one of the fitting groove or the seal member contact surface has a distance between the seal member contact surface and a lower end of the fit portion that is the rectangular shape. The corner portion is formed to be shorter than the linear region of the inner lid formed in a shape.

  According to the present invention, since the rectangular elastic seal member is provided on the inner lid so as to correspond to the seal member contact surface formed at the upper edge of the opening of the cleaning tank, the inner lid has the opening. When closing, the washing tank can be reliably shielded in a watertight manner.

  In addition, even if the sealing member has a general structure, even if the wavy deformation occurs along the curved shape at the rectangular corner portion, the sealing member contact surface and the lower end of the fitting portion Since the corner is shorter than the linear area of the inner lid that is formed in a rectangular shape, the seal member abutment surface and the seal part abut securely, and high watertight performance Can be secured. Therefore, it is not necessary to excessively increase the pressure-bonding force of the inner lid with respect to the cleaning tank, and it is possible to suppress the breakage of the elastic seal member and reduce the operation force when closing the inner lid.

  The dishwasher according to claim 2 of the present application forms a convex portion in the fitting groove at the corner, and the fitting portion of the elastic seal member is inserted into the fitting groove by the convex portion. By suppressing this, the lower end of the fitting portion is configured to be close to the seal member contact surface. Thereby, without adopting a special structure for the sealing member, it is possible to reliably suppress the poor sealing performance of the corner portion with a simple configuration in which the convex portion is formed in the fitting groove of the inner lid.

  The dishwasher according to claim 3 of the present invention is such that the fitting groove itself formed in the inner lid is formed such that the corner portion is positioned below the linear region of the inner lid. The lower end of the fitting part is configured to be close to the seal member contact surface. Accordingly, it is possible to reliably suppress the sealing performance of the corner portion with a simple configuration in which the convex portion is formed at the corner portion of the inner lid without adopting a special structure.

  According to the present invention, even if a sealing member is molded by a general method such as extrusion molding, the operation force when closing the inner lid is not increased, or the sealing member is not damaged. It is possible to achieve an excellent characteristic effect that the sealing failure of the inner lid of the built-in dishwasher can be surely prevented.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  FIG.1 and FIG.2 is a figure which shows the structure of the dishwasher which concerns on this embodiment. As shown in FIGS. 1 and 2, the dishwasher WM includes a main body case C, a cleaning tank 1, an inner lid 5, a clamp member 6, and the like. The cleaning tank 1 has an opening 11 formed above, and the tableware to be cleaned is taken in and out of the cleaning tank 1 from the opening 11. The inner lid 5 closes the opening 11 of the cleaning tank 1 and is supported by the main body case C through the clamp member 6 so as to be swingable up and down.

  The washing tank 1 is provided with a washing nozzle (not shown) and a heater (not shown), and the washing water supplied to the washing tank 1 can be washed by being sprayed on the dishes while being heated. It is configured as follows.

  A front panel (not shown) having a grip portion is attached to the front surface 12 a of the cleaning tank 1. And the washing tank 1 is inserted in the main body case C from the entrance / exit of the front surface of the main body case C, and is arrange | positioned via the roller on the rail 3 as a slide mechanism provided in the side part of the inner surface of the main body case C. Then, the cleaning tank 1 slides along the rail 3 in a direction retreating from the entrance / exit of the main body case toward the back and a direction advancing toward the entrance / exit. That is, the cleaning tank 1 is retracted and inserted into the main body case C and accommodated, or moved forward and pulled out from the main body case C.

  Ribs 13 are provided on the left and right outer surface sides of the cleaning tank 1 along the front-rear direction. A flange 11a is provided at the upper end periphery of the opening 11 over the entire circumference of the front surface 12a and the back surface 12b of the cleaning tank 1, and the seal member contact surface 16 with which the elastic seal member abuts using the flange 11a is annular. The rectangular shape is formed so that the upper surface is a flat surface.

  The inner lid 5 is a substantially rectangular flat plate that closes the opening 11 so as to be pressed when the cleaning tank 1 is accommodated in the main body case C. Two pins 53 protrude from the left and right side surfaces 51 of the inner lid 5 respectively. The inner lid 5 is accommodated in the main body case C in a state supported by two clamp members 6 provided on the left and right sides, and is opened when the cleaning tank 1 is almost completely accommodated in the main body case C. Opening / closing operation is performed so that the closed position for closing the portion 11 and the open position deviated from the opening 11 when the cleaning tank 1 is pulled out are provided.

  FIG. 3 is a diagram showing a configuration of the clamp member 6. 3A is a front view, FIG. 3B is a right side view, and FIG. 3C is a rear view. The clamp member 6 opens and closes the opening 11 by moving the inner lid 5 while moving it up and down as the cleaning tank 1 moves forward and backward.

  The clamp member 6 is provided with a guide groove 61 that guides the movement of the pin 53 on the side surface of the inner lid 5 and a shaft hole 62 that pivotally supports the clamp member 6 on the main body case C (shaft holes 62 are provided on both sides so that both the left and right can be used together. However, any one of the shaft holes 62 is actually used), and the assembling variation of the cleaning tank 1 can be reduced by contacting the insertion hole 63 used as a locking hole for locking the spring and the rib 13. The clamp member 6 is rotated around the shaft hole 62 so that the distance between the cleaning tank 1 and the inner lid 5 is kept constant by absorbing it, so that the position of the inner lid 5 is set to an appropriate distance from the cleaning tank 1. And a receiving portion 64 that adjusts accordingly. The clamp member 6 is symmetrical about the center line A as a whole.

  The guide groove 61 is provided in the upper part of the clamp member 6. The guide groove 61 includes an inclined portion 61a extending from a predetermined high position to a predetermined low position, and a horizontal portion 61b extending substantially horizontally from the lower end of the inclined portion 61a. The horizontal portion 61b is substantially parallel to a straight line connecting the shaft holes 62 and 62. With these structures, when the cleaning tank 1 is accommodated, the inner lid 5 is moved rearward as the back surface 12b of the cleaning tank comes into contact with the rear end of the inner lid 5. In synchronism with the movement of the inner lid 5, the pin member 53 slides in the guide groove 61, so that the inner lid 5 moves downward to move from the open position to the closed position. . Needless to say, when the cleaning tank 1 is pulled out, the pin member 53 of the inner lid 5 moves upward in the guide groove 61 and moves from the closed position to the open position.

  Here, although there is a part which repeats including the meaning of arrangement using FIG. 1, description is added about the whole structure. The tableware washing machine WM corresponds to the main body case C, the washing tank 1, the inner lid 5, and the seal member contact surface 16 provided in the washing tank 1 on the lower surface (the washing tank 1 side) of the inner lid 5. The elastic sealing member 2 attached to the annular rectangular shape fitted and fixed in this way, the rail 3, and the clamp member 6 are provided. The cleaning tank 1 is configured to be movable with respect to the main body case C by a rail 3 so as to be movable forward and backward. The inner lid 5 is biased upward (in a direction away from the cleaning tank 1) by a spring S disposed between the inner lid 5 and the main body case C. The movement of the inner lid 5 in the vertical direction is restricted by the clamp member 6. The clamp member 6 is configured such that the abutting portion 64 comes into contact with a convex portion provided at a predetermined position of the rib 13 provided in the cleaning tank 1, and the clamp member 6 is swung by this contact with the inner lid 5. It is comprised so that the separation distance of the washing tank 1 may be maintained at a regular interval. As a result, variations in parts and variations in assembly can be absorbed. In this state, the cleaning tank 1 abuts against the rear end portion of the inner lid 5, so that the pin 53 of the inner lid 5 moves along the guide groove 61 of the clamp member 6 and resists the urging by the spring S. The lid 5 moves from the open position to the closed position.

  As described above, the inner lid 5 is positioned along the position corresponding to the seal member contact surface 16 formed in an annular rectangular shape at the periphery of the opening 11 on the surface (lower surface) facing the cleaning tank 1. An elastic seal member 2 is disposed. When the inner lid 5 is lowered so as to close the opening portion 11, the elastic seal member 2 is brought into contact with the seal member contact surface 16 and sealed so as to be in a watertight state.

  The elastic seal member 2 and the seal member contact surface 16 will be described in more detail with reference to FIG. 4A shows a cross-sectional view of the same main part when the inner lid 5 is in the open position, and FIG. 4B shows a cross-sectional view of the same essential part when the inner lid 5 is in the closed position.

  Since the elastic seal member 2 is formed by general extrusion molding, the elastic seal member 2 is formed as a linear structure having the same cross section over the entire length of the seal member 2. Therefore, it can be molded at a very low cost. This elastic seal member 2 is roughly divided into two parts, specifically, a seal part 21 configured as a U-shaped lip shape that opens to the opening part 11 side to maintain watertightness, and an inner part The fitting portion 22 is fitted into the fitting groove 54 of the lid 5. Further, the seal portion 21 is formed of foamed rubber having bubbles therein, and the fitting portion 22 is formed of solid rubber having no bubbles. The seal portion 21 and the fitting portion 22 are rubbers different from foam and solid, but are integrally formed by two-color extrusion molding or the like.

  The seal portion 21 does not have to be exactly U-shaped in the shape of the U-shaped cross section, and is in contact with the seal member abutting surface 16 of the cleaning tank 1 as shown in FIG. A shape close to a V shape or the like may be used as long as the entirety 21 is bent and a part of the seal portion 21 is deformed so as to be along the seal member contact surface 16. Further, the seal portion 21 is integrally extended downward from a stopper portion 211 that is a lower end of the fitting portion, and includes a first seal portion 212 in the upper half portion and a second seal portion 213 in the lower half portion. Has been.

  The stopper portion 211 is configured to contact the end portion of the fitting groove 54 and cover the fitting groove 54 when the fitting portion 22 is fitted into the fitting groove 54 of the inner lid 5. Accordingly, the elastic seal member 2 is regulated so as to be fitted in the fitting groove 54 with an appropriate amount of fitting, and thereby the amount of protrusion of the seal portion 21 is made appropriate and the sealing performance is improved. It is what is secured. In addition, the stopper portion 211 covers the fitting groove 54 when the elastic seal member 2 is attached to the inner lid 5, and thus functions so that cleaning water does not enter the fitting groove 54.

  From the stopper portion 211, the fitting portion 22 and the first seal portion 212 are provided so as to extend toward opposite sides. The first seal portion 212 is disposed so as to extend obliquely from the stopper portion 211 toward the outside of the cleaning tank 1. A second seal portion 213 is provided at the tip of the first seal portion 212. The second seal portion 213 is disposed so as to extend obliquely from the tip of the first seal portion 212 toward the inside of the cleaning tank 1.

  Accordingly, when the inner lid 5 approaches toward the cleaning tank 1, the lower end 213 a of the second seal portion 213 comes into contact with the seal member contact surface 16, and the second seal portion 213 is lifted and approaches the first seal portion 212. Deform to

  In this way, when the sealing portion 21 is pressed against the sealing member abutting surface 16, even if cleaning water can flow from the inside of the cleaning tank 1, the sealing portion 21 is received inside the U-shaped cross section of the sealing portion 21. It is reduced that the cleaning water enters or goes out between the portion 21 and the seal member contact surface 16.

  The fitting portion 22 is fitted into a fitting groove 54 formed on the lower surface of the inner lid 5, and the elastic seal member 2 is attached to the inner lid 5 by fitting the fitting portion 22 into the fitting groove 54. It has been. The fitting portion 22 is formed of solid rubber, and two annular protrusions 221 are provided on the surface along the side wall of the fitting groove 54 in the vertical direction. The dimension of the convex part 221 is formed to be longer than the groove width of the fitting groove 54. Accordingly, when the fitting portion 22 is fitted into the fitting groove 54, the fitting portion 22 is fitted so as to be crushed, and the fitting portion 22 is more firmly fitted by the repulsive force of the protruding portion 221. It fits into the groove 54.

  Further, the elastic seal member 2 is attached by forming the fitting portion 22 with solid rubber and fitting the fitting portion 22 into the fitting groove 54 of the inner lid 5, but the solid rubber has bubbles inside. Because it is a rubber that does not substantially exist, it is difficult to deform and has a strong repulsive force. Accordingly, since the fitting portion 22 formed of solid rubber that is not easily deformed and has a strong repulsive force is fitted into the fitting groove 54, the fitting portion 22 is in close contact with the inside of the fitting groove 54 and has a strong repulsion. It will be firmly attached by force.

  Furthermore, since the washing water is heated to nearly 80 degrees in the dishwasher, the temperature of the elastic seal member 2 can be greatly changed from room temperature to 80 degrees. This has an excellent effect that it is possible to surely prevent the protrusion or the worst slipping out of the joint groove 54. That is, since the fitting portion 22 is formed of solid rubber instead of foamed rubber, even if there is a temperature change peculiar to the dishwasher WM, the solid rubber has substantially no air bubbles therein, and air in the air bubbles Since there is no deformation due to expansion, it is possible to prevent the fitting part 22 from repeatedly contracting and expanding in the fitting groove 54, and therefore, the fitting part 22 tends to come out of the fitting groove 54 as the expansion and contraction changes. Therefore, it is possible to reliably prevent a problem that the amount of protrusion of the seal portion 21 is changed and unevenness occurs in the contact state with respect to the seal member contact surface 16 to deteriorate the watertight performance or increase the operating force. It is a product.

  On the other hand, since the sealing portion 21 is formed of foamed rubber, the sealing portion 21 easily deforms along the shape of the corner portion even if the elastic sealing member 2 is bent along the corner portion. 21 is an elastic seal member that is formed into a straight line with a uniform cross section by extrusion molding in order to keep the original U-shape clean without being deformed in a state where it is wavy or greatly dented. Even in this case, the watertight performance can be reliably secured at the corners. As a result, there is no need to unnecessarily press the elastic seal member 2 against the seal member abutting surface 16, and the problem that the operating force becomes heavy does not occur.

  Specifically, the inner lid 5 has a substantially rectangular shape, and the opening 11 of the cleaning tank 1 also has a substantially rectangular shape. Therefore, the fitting groove 54 also has a plan view along the shape. The corner portion of the fitting groove 54 having a substantially rectangular shape is formed in a curved shape having a relatively small radius R. When the fitting portion 22 is fitted into the corner portion of the fitting groove 54 formed in such a small R curve, the seal portion 21 molded integrally with the fitting portion 22 also has a shape of the corner portion. Of course, it is deformed so as to follow. Specifically, when the elastic seal member 2 linearly formed by extrusion molding is deformed along the corner, the lower end 213a of the seal portion 21 is deformed such that the inside is compressed and the outside is stretched. Since the lower end 213a of the seal portion 21 is compressed on the inner side and the deformation is not sufficient, the length of the lower end 213a becomes excessive if the deformation is not sufficient. Deformation that sags in the direction of narrowing the opening distance occurs. However, in the present invention, since the sealing portion 21 is molded from foamed rubber, the deformation corresponding to the compressive force is quickly absorbed, so that the sealing portion 21 has a stable and beautiful U-shape even at the corners. Thus, it is possible to ensure high watertightness by abutting against the seal abutment surface 16 with certainty.

  Next, in addition to the structure in which the fitting portion 22 is made of solid rubber and the seal portion 21 is made of foamed rubber, further contrivance points for enhancing the watertight performance adopted by the present invention will be described. FIG. 5 shows a state of a cross-sectional view (FIG. 5A) at a straight portion of the fitting groove 54 formed in the inner lid 5 and a state of a cross-sectional view at the corner portion of the fitting groove 54 (FIG. It is a figure which shows b)). Moreover, the same structure is attached | subjected the same code | symbol and detailed description is abbreviate | omitted.

  In the present embodiment, the fitting groove 54 corresponding to the corner portion of the inner lid 5 is entirely downward so that it is closer to the seal member contact surface 16 by a distance d than the fitting groove 54 in the linear region. The stopper portion 211 is brought close to the seal member contact surface 16. As a result, even if the seal portion 21 at the corner is deformed and the distance from the stopper portion 211 to the lower end 213a of the second seal portion 213 is shortened, the stopper portion 211 is moved downward by a distance d so as to correspond to it. Therefore, it is possible to surely suppress the occurrence of a gap at each corner or a weak sealing force. Therefore, the problem that the cleaning water leaks out of the cleaning tank 1 does not occur. In this example, the entire corner portion of the inner lid 5 is molded so as to be positioned downward, but instead, the depth of the corner portion of the fitting groove 54 is a distance d as compared with the straight portion. You may form a convex part in the inside of a corner | angular part so that it may shorten only. By doing so, since the fitting portion 22 cannot be inserted deeper than the straight portion in the fitting groove 54 at the corner portion, the lower end 213a of the second seal portion 213 is brought into contact with the seal member contact surface 16 by the distance d. Similarly, since the distance d is close, the same effect can be obtained. By forming in this way, the position of the lower end 213a of the second seal portion 213 with respect to the seal member abutting surface 16 is kept at the same level over the entire circumference even if the region corresponding to the corner of the seal portion 21 is deformed. Since it can be maintained, even if the inner lid 5 is in a closed state, there is no occurrence of a gap or a decrease in sealing force at each corner.

  Subsequently, a modification of the elastic seal member 2 shown in FIG. 4 is shown in FIG. 6 as an elastic seal member 2a. 6 shows corners around the fitting portion 54 of the inner lid 5, and FIG. 6A shows the case where the inner lid 5 is in the open position, and FIG. 6B shows the inner lid 5. Each of the cases 5 is in the closed position. Also in this embodiment, the sealing portion 21 is formed of foamed rubber and the fitting portion 22 is formed of solid rubber as in the previous embodiment. Further, similarly to FIG. 5, the stopper portion 211 at the corner portion is configured to be closer to the seal member contact surface 16 by a distance d than the linear region of the fitting groove 54.

  Further, in this embodiment, in order to ensure the watertight performance by the elastic seal member 2a, a water removal part 23 is provided in the elastic seal member 2a in addition to the seal part 21 and the fitting part 22. The seal part 21 is made of foam rubber, and the water removal part 23 and the fitting part 22 are made of solid rubber. The seal part 21, the water removal part 23, and the fitting part 22 are integrally formed by two-color extrusion molding or the like.

  From the stopper portion 211 made of solid rubber, the drainage portion 23 molded so as to be relatively thick and strong is formed to extend toward the same side as the first seal portion 212. The drainage unit 23 is provided inside the cleaning tank 1, that is, on the opening 11 side than the first seal portion 212 and the second seal portion 213.

  The lower end 23a of the drainage unit 23 and the lower end 213a of the second seal portion 213 are formed in a free end shape that is separated from each other by a predetermined distance. When the inner lid 5 approaches the cleaning tank 1, the lower end 213 a of the second seal portion 213 comes into contact with the seal member contact surface 16, and the second seal portion 213 is lifted and approaches the first seal portion 212. Transforms into On the other hand, the lower end 23a of the water removal part 23 is formed in such a length that it is close to the seal member contact surface 16 but does not come into contact therewith. The operating force does not increase when the inner lid 5 is closed. However, since it is arranged close to the seal member abutting surface 16, the strong washing water from the washing pump can be blocked by this highly rigid drainage part 23 formed of solid rubber. It is devised so that strong washing water does not directly collide with the low rigidity seal portion 21 formed of foam rubber, and water leakage due to deformation of the seal portion 21 can be surely prevented.

  In this embodiment, the lower surface of the inner lid 5 is used to shorten the distance between the seal member contact surface 16 and the stopper portion 211 at the lower end of the fitting portion 22 at a position corresponding to the corner of the inner lid 5. The structure has been described in which the protrusion is protruded downward or the protrusion projecting downward is provided in the fitting groove 54 at the corner. However, the present invention is not limited to this, and the seal member contact surface 16 side is set to the inner lid 5 side. It goes without saying that the distance may be shortened by molding so as to protrude.

It is a figure which shows schematic structure of the dishwasher which is embodiment of this invention. It is a figure which shows the principal part structure of the dishwasher which is embodiment of this invention. It is a figure which shows the structure of the clamp member shown in FIG. It is a figure for demonstrating the relationship between an elastic sealing member and a sealing member contact surface. It is a figure for demonstrating the formation aspect of a fitting groove. It is a figure for demonstrating the modification of an elastic seal member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS WM ... Dishwasher, C ... Main body case, 1 ... Washing tank, 2 ... Elastic seal member, 5 ... Inner lid, 16 ... Seal member contact surface, 21 ... Seal part, 22 ... Fitting part, 23 ... Water removal 54, fitting groove.

Claims (3)

A cleaning tank with a rectangular opening formed at the top;
A body case provided so that the washing tank can be pulled out;
When the cleaning tank is housed in the main body case, a rectangular inner lid supported so as to be movable up and down with respect to the main body case so as to close the opening and shield it in a watertight manner,
A dishwasher comprising:
A rectangular sealing member contact surface formed in a rectangular shape along the periphery of the opening at the upper end of the cleaning tank;
A fitting groove formed as a rectangular groove formed at a position facing the seal member contact surface of the inner lid and recessed upward;
An elastic seal member fixed to the inner lid by being fitted into the fitting groove;
With
The elastic seal member performs sealing by projecting downward from a fitting portion fitted into the fitting groove and a lower end portion of the fitting portion, and a lower portion thereof abutting against the seal member abutment surface. Having a seal portion configured as follows,
In at least one of the fitting groove or the sealing member contact surface, a distance between the sealing member contact surface and the lower end of the fitting portion is larger than a linear region of the inner lid formed in the rectangular shape. The dishwasher is formed so that the corners are shorter.   A convex portion is formed in the fitting groove at the corner portion, and the convex portion prevents the fitting portion of the elastic seal member from being inserted into the fitting groove. The dishwasher according to claim 1, wherein the lower end is configured to be close to the seal member contact surface.   The fitting groove itself formed in the inner lid is formed so that the corner portion is positioned lower than the straight region of the inner lid, so that the lower end of the fitting portion is a seal member contact. The dishwasher according to claim 1, wherein the dishwasher is configured to be close to the contact surface.