Dishwashers

Abstract

To provide a dishwasher facilitating attaching a packing to an annular groove of a lid main body, and capable of improving easiness in assembling a lid body.SOLUTION: A washing tank can be drawn forward from a housing, and has an upper opening. A lid body 7 is supported on an upper part in the housing so as to be vertically movable, and descends in push-in of the washing tank into the housing so as to close the upper opening. The lid body 7 has a lid main body 11 having an annular groove 21 formed in a lower surface peripheral edge part 19, and a packing 13 attached to the annular groove 21. The packing 13 has a packing body part 25 contacting the upper surface peripheral edge part of the washing tank, a standing piece part 27 extending upward from the packing body part 25, and an eaves part 19 protruding to the outside from the standing piece part 27 and inserted into the annular groove 21. The lid main body 11 has in a rear side part 21d of the annular groove 21, a first pawl part 35 that protrudes from a lower surface of an outer edge part 33 of the annular groove 21 to the inside and is engaged with the lower surface of an eaves part 29 inserted into the rear side part 21d.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to dishwashers. [Background technology]

[0002] An example of a conventional dishwasher is disclosed in Patent Document 1. This dishwasher includes a housing, a washing tank, and a lid. The housing has a front opening that is open at the front.

[0003] The cleaning tank is housed in the housing so as to be able to be pulled out forward from a front opening. The cleaning tank has a top opening through which the object to be cleaned is put in and taken out.

[0004] The cover is supported at an upper portion within the housing so as to be movable up and down. When the cleaning tank is pushed into the housing, the cover descends to close the top opening of the cleaning tank.

[0005] The lid body includes a lid body, a packing, and a reinforcing frame. The lid body is substantially rectangular with four sides: a left side and a right side extending in the front-rear direction of the lid body, and a front side and a rear side extending in the left-right direction of the lid body. The lid body has a substantially rectangular annular groove on the periphery of its lower surface.

[0006] The packing is attached to the annular groove to seal between the upper peripheral edge of the cleaning tank surrounding the upper opening and the lid that closes the upper opening. The packing has a packing body that abuts against the upper peripheral edge, a standing piece that extends upward from the packing body, and a visor that projects outward from the standing piece and is inserted into the annular groove.

[0007] The reinforcing frame is attached to the periphery of the lid body. The reinforcing frame is made up of four reinforcing plates attached to the four sides of the lid body, the front, back, left and right. Each reinforcing plate has a bent portion that bends inward from its lower end. The bent portion engages with the underside of the visor portion inserted into the annular groove.

[0008] The underside of the overhanging part of the packing inserted into the annular groove of the lid body engages with the folded parts of each of the reinforcing plates attached to the four sides of the lid body, preventing the packing from falling off from the lid body. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2005-177281 A Summary of the Invention [Problem to be solved by the invention]

[0010] However, the above-mentioned conventional dishwasher has a problem that the assembly of the lid is troublesome. That is, when assembling the lid, the eaves of the packing must first be inserted into the annular groove of the lid body, and then the reinforcing plates must be attached to each of the four sides of the lid body in order while maintaining the inserted state. Since the annular groove of the lid body itself does not have a means for holding the eaves, the eaves are likely to come off the annular groove when attaching the reinforcing plates. In particular, when attaching the first reinforcing plate, the eaves are likely to come off the annular groove on the side where the reinforcing plate is to be attached, making the assembly of the lid quite troublesome.

[0011] The present invention has been made in consideration of the above-mentioned situation, and has as its object to provide a dishwasher in which a gasket can be easily attached to the annular groove of the lid body, thereby improving the ease of assembly of the lid body. [Means for solving the problem]

[0012] The dishwasher of the present invention comprises: A housing having a front opening; a cleaning tank that is housed in the housing and can be pulled out forward from the front opening, and has a top opening for inserting and removing an object to be cleaned; a lid supported in an upper portion of the housing so as to be movable up and down, and which descends to close the top opening when the washing tub is pushed into the housing, the lid body is substantially rectangular with four sides, namely, left and right sides extending in a front-rear direction of the lid body, and front and rear sides extending in a left-right direction of the lid body, and includes a lid body having an annular groove on a bottom surface peripheral edge portion, and a gasket attached to the annular groove for sealing between the top surface peripheral edge portion of the cleaning tank surrounding the top surface opening and the lid body closing the top surface opening, The packing has a packing body portion that abuts against the upper surface peripheral portion, a standing piece portion that extends upward from the packing body portion, and a visor portion that projects outward from the standing piece portion and is inserted into the annular groove, The annular groove has a generally rectangular shape having four sides, that is, a left side and a right side extending in the front-rear direction, and a front side and a rear side extending in the left-right direction, The lid body is characterized in that at least one of the four sides has a claw portion that protrudes inward from the underside of the outer edge of the annular groove and engages with the underside of the eaves portion inserted into that side of the annular groove.

[0013] The dishwasher of the present invention has a claw portion on at least one of the four sides of the annular groove to which the packing is attached. Therefore, when attaching the packing to the annular groove, the eaves of the packing are inserted into the side of the annular groove having the claw portion, and the claw portion is engaged with the underside of the eaves. This makes it possible to hold the packing on the side of the annular groove on which the claw portion is provided, and to position the packing relative to the annular groove. This makes it easier to attach the packing to other parts of the annular groove.

[0014] Therefore, in the dishwasher of the present invention, the packing can be easily attached to the annular groove of the lid body, improving ease of assembly of the lid body.

[0015] It is preferable that the annular groove has four arcuate curved portions at its four corners connecting adjacent sides, and the lid body has a claw portion at each curved portion.

[0016] In this case, when attaching the packing to the annular groove, first, the eaves are inserted into one of the sides or curved parts at the four corners where the claws of the annular groove are provided, and the claws are engaged with the underside of the eaves, thereby holding the packing in that part. Then, the eaves are inserted into the other sides or curved parts at the annular groove where the claws are provided, and the claws are engaged with the underside of the eaves. By holding the packing in the sides or curved parts at the four corners where the claws of the annular groove are provided, the work of attaching the packing to the other sides at which the claws of the annular groove are not provided becomes easier.

[0017] It is preferable that a plurality of the claw portions are formed at intervals from each other.

[0018] If multiple claws are formed on one side or one curved portion, the packing can be held in an area including the two claws at the farthest ends of the side or curved portion, which can improve the retention of the packing in the annular groove on the side or curved portion on which multiple claws are formed.

[0019] It is preferable that the interval between adjacent claw portions formed on the curved portion is smaller than the interval between the claw portions formed on the side portions.

[0020] Since the packing is more likely to bend at the curved portion than at the sides, the sealing performance of the packing is likely to decrease at the curved portion. If the gap between the claws formed at the curved portion is small, it is advantageous to ensure the sealing performance of the packing between adjacent claws.

[0021] A reinforcing plate is preferably attached to the side of the lid body corresponding to the side where the claw portion is not formed among the four sides. This reinforcing plate preferably has a bent portion that is bent inward from the lower end and engages with the lower surface of the visor portion inserted into the corresponding side of the annular groove.

[0022] In this case, at the side where the annular groove does not have the tab, the bent portion of the reinforcing plate attached to the side of the lid body corresponding to the side engages with the underside of the eaves inserted into the side, so that the reinforcing plate can hold the packing even at the side where the annular groove does not have the tab.

[0023] It is preferable that a reinforcing plate is attached to the front edge of the lid body, and the bent portion of the reinforcing plate extends continuously in the extension direction of the reinforcing plate.

[0024] In this case, the reinforcing plate is attached to the front edge of the lid body, which is closest to the front opening of the housing and is likely to be touched by the user's fingers, etc. The reinforcing plate has a bent portion extending continuously in the direction in which the reinforcing plate extends, so that the bent portion can prevent the user's fingers, etc. from accidentally touching the eaves portion of the packing, and can prevent the packing from coming out of the annular groove.

[0025] It is preferable that a claw portion is formed on the rear edge portion, and the lid body comprises an annular first vertical wall provided inside the annular groove and extending downwardly below the annular groove, and a second rear vertical wall provided inside the first rear vertical wall of a portion of the first vertical wall corresponding to the rear edge portion and near the rear wall of the cleaning tank stored in the housing, and extending downwardly below the underside of the first rear vertical wall.

[0026] In this case, when the cleaning tank is inserted or removed, the first rear vertical wall and the second rear vertical wall prevent long items to be cleaned, such as chopsticks stored in the cleaning tank, from coming into contact with the gasket with the eaves inserted into the rear edge of the annular groove, thereby preventing the gasket from coming off the annular groove. Effect of the Invention

[0027] According to the dishwasher of the present invention, the packing can be easily attached to the annular groove of the lid body, improving ease of assembly of the lid body. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a side view showing a schematic configuration of a dishwasher according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the lid of the dishwasher according to the embodiment in an upside-down state. [Diagram 3] FIG. 3 is a perspective view of the lid of the dishwasher according to the embodiment in an upside-down state. [Figure 4] FIG. 4 is a partial perspective view showing the rear part of the lower surface of the lid body of the dishwasher according to the embodiment. [Diagram 5] FIG. 5 is a cross-sectional view taken along line AA in FIG. 3, showing the dishwasher of the embodiment. [Figure 6] FIG. 6 is a cross-sectional view taken along line BB in FIG. 3, showing the dishwasher of the embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along line CC in FIG. 3, showing the dishwasher of the embodiment. [Figure 8] 8 is a partial cross-sectional view of the washing tub and the lid that closes the top opening of the washing tub, taken along the line AA in FIG. 3, of the dishwasher of the embodiment. [Figure 9] FIG. 9 is a partial perspective view showing the rear part of the washing tub in the dishwasher according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0030] (Example) As shown in Fig. 1, the dishwasher 1 of the embodiment is an example of a specific embodiment of the dishwasher of the present invention. The dishwasher 1 is a front-drawer type installed under the countertop of a system kitchen.

[0031] In this embodiment, the side that the user who uses the system kitchen faces the housing 3, i.e., the left side of the paper in FIG. 1, is defined as the front of the housing 3, and the opposite side, i.e., the right side of the paper in FIG. 1, is defined as the rear of the housing 3. In addition, the side that the user faces left when facing the housing 3, i.e., the back side of FIG. 1, is defined as the left side of the housing 3, and the side that the user faces right, i.e., the front side of the paper in FIG. 1, is defined as the right side of the housing 3. In addition, the front-rear direction, left-right direction, and up-down direction shown in each of the figures from FIG. 2 onwards are all displayed in correspondence with FIG. 1. In the following description, the front-rear direction means the front-rear direction of the housing 3 and the lid 7, and the left-right direction means the left-right direction of the housing 3 and the lid 7.

[0032] <Configuration of the housing, cleaning tank and lid> The dishwasher 1 of this embodiment includes a housing 3, a washing tub 5, and a lid 7.

[0033] The housing 3 is a generally box-shaped body having a front opening 3a. The cleaning tank 5 is a generally box-shaped body having a top opening 5a for inserting and removing the object to be cleaned. As shown in Figures 8 and 9, the cleaning tank 5 has an annular top peripheral portion 9 surrounding the top opening 5a. This top peripheral portion 9 becomes an annular sealing portion that is sealed by a packing 13 (described later) of the lid 7 when it is in the closed position.

[0034] A slide rail mechanism (not shown) is provided between the inner wall surfaces on both the left and right sides of the lower part of the housing 3 and the outer wall surfaces on both the left and right sides of the lower part of the cleaning tank 5. The cleaning tank 5 is slidable in the front and rear directions relative to the housing 3 by the slide rail mechanism. The cleaning tank 5 is stored in the housing 3 so that it can be pulled out forward from the front opening 3a. The cleaning tank 5 is movable between a pull-out position where it is pulled out forward from inside the housing 3 through the front opening 3a, and a storage position where it is pushed into the housing 3 and stored. In the pull-out position, the cleaning object can be put in and taken out from the top opening 5a. In the storage position, the cleaning tank 5 closes the front opening 3a of the housing 3.

[0035] The objects to be washed by the dishwasher 1 are, for example, tableware such as bowls, plates, glasses, and other eating and drinking utensils, as well as chopsticks, spoons, forks, cooking chopsticks, ladles, spatulas, and other eating and drinking utensils.

[0036] The lid body 7 is disposed at the upper part of the housing 3. The lid body 7 is supported by the housing 3 by an interlocking mechanism (not shown) so as to move up and down in conjunction with the sliding of the cleaning tank 5. The lid body 7 is lowered when the cleaning tank 5 is pushed into the housing 3, and is raised when the cleaning tank 5 is pulled out from the housing 3. The lid body 7 is movable between a closed position where it closes the top opening 5a of the cleaning tank 5, and an open position where it opens the top opening 5a. The lid body 7 is in the lowered closed position when the cleaning tank 5 is in the stored position, and is in the raised open position when the cleaning tank 5 is in the pulled out position.

[0037] As shown in FIG. 2, the lid 7 includes a lid main body 11, a packing 13, and three reinforcing plates 15a to 15c.

[0038] The lid body 11 is made of synthetic resin and has a substantially rectangular outer shape. The lid body 11 has four sides 17a to 17d, namely, a left side 17a and a right side 17b extending in the front-rear direction of the lid body 7, and a front side 17c and a rear side 17d extending in the left-right direction of the lid body 7. The left side 17a and the right side 17b correspond to the long sides of the rectangle, and the front side 17c and the rear side 17d correspond to the short sides of the rectangle.

[0039] 5 to 8, an annular groove 21 having a substantially rectangular shape corresponding to the outer shape of the lid body 11 is formed in the lower surface peripheral edge portion 19 of the lid body 11. As shown in Fig. 2, the annular groove 21 has four sides 21a to 21d, namely, a left side portion 21a and a right side portion 21b extending in the front-rear direction of the lid body 7, and a front side portion 21c and a rear side portion 21d extending in the left-right direction of the lid body 7. The annular groove 21 also has first to fourth curved portions 23a to 23d in the shape of arcs at the four corners connecting adjacent sides. The first curved portion 23a connects the left side portion 21a and the rear side portion 21d, the second curved portion 23b connects the right side portion 21b and the rear side portion 21d, the third curved portion 23c connects the right side portion 21b and the front side portion 21c, and the fourth curved portion 23d connects the left side portion 21a and the front side portion 21c.

[0040] The packing 13 is made of an elastic material such as silicone rubber and has an annular shape. The packing 13 is an endless annular body formed by vulcanizing and bonding both ends of an extrusion molding. The packing 13 is attached around the entire circumference of the annular groove 21. When the cleaning tank 5 is stored in the housing 3 and the lid 7 is lowered to close the top opening 5a, the packing 13 seals the gap between the top peripheral portion 9 of the cleaning tank 5 surrounding the top opening 5a and the lid 7 around the entire circumference.

[0041] The packing 13 has the same cross-sectional shape all around. As shown in Fig. 5 to Fig. 8, the packing 13 has a tubular packing body 25 that abuts against the upper peripheral edge 9, an upright piece 27 that extends upward from the packing body 25, an eave portion 29 that protrudes outward from the tip of the upright piece 27, and an upper end piece 31 that extends upward from the tip of the upright piece 27 beyond the eave portion 29. The packing 13 is attached to the annular groove 21 with the eave portion 29 and the upper end piece 31 inserted into the annular groove 21.

[0042] The annular groove 21 is formed so as to receive the upper end piece 31 extending upward from the eaves portion 29. Also, as shown in Fig. 8, in the area where the first claw portion 35 and the second claw portion 37 described later are formed, a punch hole 22 is formed in the upper surface of the annular groove 21 for punching out the mold for forming the upper surfaces of the first claw portion 35 and the second claw portion 37 upward.

[0043] The lid body 11 has nine first claws 35 that protrude inward from the lower surface of the outer edge 33 of the annular groove 21 on the rear side 21d of the four sides 21a to 21d of the annular groove 21. The nine first claws 35 are distributed at equal intervals over the entire length of the rear side 21d extending in the left-right direction.

[0044] In the longitudinal direction of the rear side portion 21d extending in the left-right direction, the total length of the nine first claw portions 35 is about 30 to 35% of the length of the rear side portion 21d. In order to favorably hold the packing 13 within the side portion of the annular groove 21, it is preferable that the total length of the first claw portions 35 is 25% or more of the length of the side portion. On the other hand, from the viewpoint of ease of assembly of the eaves portion 29 to the side portion, it is preferable that the total length of the first claw portions 35 is 50% or less of the length of the side portion.

[0045] The lid body 11 has three second claw portions 37 that protrude inward from the lower surface of the outer edge portion 33 of the annular groove 21 in each of the first to fourth curved portions 23a to 23d. The three second claw portions 37 are distributed at equal intervals over the entire length of each of the first to fourth curved portions 23a to 23d extending in the circumferential direction.

[0046] When the distance between adjacent first claw portions 35 at the rear side 21d is G1 and the distance between adjacent second claw portions 37 at each of the first to fourth curved portions 23a to 23d is G2, the relationship between G1 and G2 is G1>G2.

[0047] Each of the first claws 35 formed on the rear side 21d engages with the underside of the eaves portion 29 inserted into the rear side 21d. By each of the first claws 35 engaging with the underside of the eaves portion 29, the packing 13 can be held in the annular groove 21 at the rear side 21d.

[0048] The second claws 37 formed on the first to fourth curved portions 23a to 23d engage with the underside of the overhanging portion 29 inserted into the first to fourth curved portions 23a to 23d. By engaging the second claws 37 with the underside of the overhanging portion 29, the packing 13 can be held in the annular groove 21 in the portions of the first to fourth curved portions 23a to 23d.

[0049] 2, reinforcing plates 15a to 15c are attached to the left side 17a, right side 17b and front side 17c of the four sides 17a to 17d of the lid body 11 by screws 39. That is, reinforcing plate 15a is attached to the left side 17a, reinforcing plate 15b is attached to the right side 17b, and reinforcing plate 15c is attached to the front side 17c. The reinforcing plates 15a to 15c are made of metal and have sufficient rigidity to suppress warping of the lid body 11 made of synthetic resin.

[0050] As shown in Fig. 7, a bent portion 41 that is bent inward is formed on the lower edge of each of the reinforcing plates 15a to 15c. The bent portion 41 extends continuously over the entire longitudinal direction in which the reinforcing plates 15a to 15c extend. The bent portion 41 of the reinforcing plates 15a to 15c engages with the lower surface of the eaves portion 29 of the packing 13 inserted into the left side portion 21a, the right side portion 21b, and the front side portion 21c of the annular groove 21. By engaging the bent portion 41 with the lower surface of the eaves portion 29, the packing 13 can be held in the left side portion 21a, the right side portion 21b, and the front side portion 21c of the annular groove 21.

[0051] As shown in Figs. 5 to 8, the lid body 11 has a first annular vertical wall 43 that is provided inside the annular groove 21 and extends downward from the lower end of the annular groove 21. A portion of the first vertical wall 43 that corresponds to the rear edge portion 21d is defined as a first rear vertical wall 45. The lid body 11 has a second rear vertical wall 49 that is provided inside the first rear vertical wall 45. The second rear vertical wall 49 extends downward from the lower surface of the first rear vertical wall 45. In addition, the second rear vertical wall 49 is disposed near the rear wall of the cleaning tank 5 when the lid body 7 is in the closed position. Specifically, when the lid body 7 is in the closed position, the second rear vertical wall 49 is disposed at a position about 25 to 30 mm forward from the front end 91 of the upper surface peripheral portion 9.

[0052] As shown in Fig. 4, the second rear vertical wall 49 extends continuously over almost the entire length of the annular groove 21 along the longitudinal direction in which the first curved portion 23a, the rear side portion 21d, and the second curved portion 23b extend. As shown in Fig. 8, the second rear vertical wall 49 is located between the first rear vertical wall 45 and the rear inner wall surface 47 in the front-rear direction of the lid body 7 when the lid body 7 is in the closed position. In addition, the second rear vertical wall 49 extends downward below the upper peripheral portion 9 of the cleaning tank 5 when the lid body 7 is in the closed position.

[0053] As shown in Figs. 8 and 9, the upper end of the rear inner wall surface 47 is located below the upper peripheral edge portion 9 of the cleaning tank 5. An inclined surface 51 that rises toward the rear is connected to the upper end of the rear inner wall surface 47. A standing wall 53 that extends upward to near the height position of the upper peripheral edge portion 9 is formed on the inclined surface 51. The standing wall 53 extends continuously over almost the entire width in the left-right direction in the cleaning tank 5. As shown in Fig. 8, when the cover body 7 is in the closed position, the first rear vertical wall 45 is located between the front end 91 of the upper peripheral edge portion 9 and the standing wall 53 in the front-rear direction of the cover body 7, and the second rear vertical wall 49 is located between the standing wall 53 and the rear inner wall surface 47. When the cover body 7 is in the closed position, the second rear vertical wall 49 extends below the upper end of the standing wall 53.

[0054] When the washing tub 5 is in the stored position, the packing 13 seals between the upper peripheral edge 9 and the lid 7 which is in the closed position. When the washing tub 5 is in the pulled-out position, the lid 7 remains in the housing 3 and is in the open position, and the upper opening 5a exposed to the outside of the housing 3 is opened. This allows the user to place tableware in the washing tub 5 or remove it from the washing tub 5 through the upper opening 5a.

[0055] In addition, this dishwasher 1 is equipped with an automatic cleaning mechanism (not shown) for automatically cleaning the tableware contained in the cleaning tank 5, and an automatic drying mechanism (not shown) for automatically drying the washed tableware as necessary.

[0056] <Action and effect> In the dishwasher 1 of the embodiment, the first claw portion 35 is formed on the rear edge portion 21d of the four edges of the annular groove 21 to which the packing 13 is attached. Therefore, when attaching the packing 13 to the annular groove 21, the upper end piece portion 31 and the eaves portion 29 of the packing 13 are inserted into the rear edge portion 21d, and the first claw portion 35 is engaged with the lower surface of the eaves portion 29. This makes it possible to hold a part of the packing 13 within the rear edge portion 21d, and to position the packing 13 with respect to the annular groove 21. This makes it easier to attach the remaining part of the packing 13 to the other part of the annular groove 21.

[0057] Therefore, in the dishwasher 1 of the embodiment, the packing 13 can be easily attached to the annular groove 21 of the lid body 11, and the ease of assembly of the lid body 7 is improved.

[0058] In addition, in this dishwasher 1, no reinforcing plate is attached to the rear side 17d of the lid body 11, which is advantageous in terms of cost compared to a case in which reinforcing plates are attached to all four sides of the lid body 11.

[0059] In addition, in the dishwasher 1, the first claw portion 35 is formed on the rear side 21d, and the second claw portion 37 is also formed on the first to fourth curved portions 23a to 23d at the four corners. In this case, when attaching the packing 13 to the annular groove 21, for example, after a part of the packing 13 is held in the rear side 21d, the upper end piece portion 31 and the eaves portion 29 are inserted into the first curved portion 23a and the second curved portion 23b located at both ends of the rear side 21d, and the second claw portion 37 is engaged with the lower surface of the eaves portion 29. As a result, the packing 13 is partially held in the rear side 21d and the first curved portion 23a and the second curved portion 23b at both ends thereof, and the packing 13 can be reliably positioned with respect to the annular groove 21. Then, the upper end piece portion 31 and the eaves portion 29 are inserted into the remaining third curved portion 23c and fourth curved portion 23d, and the second claw portion 37 is engaged with the lower surface of the eaves portion 29. This allows the packing 13 to be held in the rear side portion 21d of the annular groove 21 and within the first to fourth curved portions 23a to 23d at the four corners, and allows the packing 13 to be more reliably positioned with respect to the annular groove 21. This makes it easier to attach the packing 13 to the other side portions of the annular groove 21 where the first claw portions 35 are not provided.

[0060] Furthermore, in the dishwasher 1, nine first claws 35 are formed at intervals on the rear side 21d, and three second claws 37 are formed at intervals on each of the first to fourth curved portions 23a to 23d. In the rear side 21d, the packing 13 can be held in the annular groove 21 in a range including the two first claws 35 at both ends that are the furthest out of the nine first claws 35. Similarly, in each of the first to fourth curved portions 23a to 23d, the packing 13 can be held in the annular groove 21 in a range including the two second claws 37 at both ends out of the three second claws 37. Moreover, the nine first claws 35 are distributed at equal intervals over the entire length of the rear side 21d. Similarly, the three second claws 37 are distributed at equal intervals over the entire length of each of the first to fourth curved portions 23a to 23d. This improves the retention of the packing 13 in the annular groove 21.

[0061] Furthermore, in this dishwasher 1, the distance between adjacent claws is smaller, that is, the distance G2 between the second claws 37 formed on each of the first to fourth curved portions 23a to 23d, than the distance G1 between the first claws 35 formed on the rear side portion 21. In the first to fourth curved portions 23a to 23d, the packing 13 is prone to bending and the sealing performance of the packing 13 is likely to decrease, but since the distance G2 between the second claws 37 is made small, this is advantageous for ensuring the sealing performance of the packing 13 between the adjacent second claws 37.

[0062] Furthermore, in this dishwasher 1, reinforcing plates 15a to 15c are attached to the left side 17a, right side 17b and front side 17c of the lid body 11 corresponding to the left side 21a, right side 21b and front side 21c where the first claw portion 35 is not formed among the four sides. A bent portion 41 that bends inward from the lower end is formed at the lower end of each of the reinforcing plates 15a to 15c. Each bent portion 41 engages with the lower surface of the eaves portion 29 inserted into the left side 21a, right side 21b and front side 21c of the annular groove 21. As a result, the reinforcing plates 15a to 15c can hold the packing 13 even in the sides where the first claw portion 35 of the annular groove 21 is not formed.

[0063] In addition, in this dishwasher 1, a reinforcing plate 15c is attached to the front edge 17c of the lid body 11, which is closest to the front opening 3a of the housing 3 and is likely to be touched by the user's fingers, etc. The bent portion 41 of this reinforcing plate 15c extends continuously over the entire longitudinal direction of the reinforcing plate 15c. Therefore, the bent portion 41 can prevent the user's fingers, etc. from accidentally touching the eaves portion 29 of the packing 13, and can prevent the packing 13 from coming out of the annular groove 21.

[0064] Furthermore, in the dishwasher 1, the lid body 11 is formed with a first rear vertical wall 45 extending downward from the lower end of the annular groove 21 on the inside of the annular groove 21 at the rear edge 21d where the first claw portion 35 is formed, and a second rear vertical wall 49 extending further downward than the first rear vertical wall 45 is formed further inside the first rear vertical wall 45. This second rear vertical wall 49 extends downward from the upper end of the standing wall 53 and the upper surface peripheral edge portion 9 when the lid body 7 is in the closed position. Moreover, this second rear vertical wall 49 is located between the first rear vertical wall 45 or the standing wall 53 and the rear inner wall surface 47 when the lid body 7 is in the closed position. Such first rear vertical wall 45, second rear vertical wall 49 and standing wall 53 prevent long tableware such as chopsticks stored in the cleaning tank 5 from coming into contact with the gasket main body portion 25 of the gasket 13 inserted into the rear edge portion 21d when the cleaning tank 5 is inserted or removed, thereby preventing the gasket 13 from coming out of the annular groove 21.

[0065] Although the present invention has been described above with reference to the embodiments, it goes without saying that the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the present invention.

[0066] In the embodiment, the first claw portion 35 is formed on the rear side 21d of the four sides of the annular groove 21, and the reinforcing plates 15a to 15c are attached to the three sides of the lid body 11 corresponding to the remaining three sides, but the present invention is not limited to this configuration. For example, the first claw portion 35 may be formed on one side other than the rear side 21d, and the reinforcing plates 15a to 15c may be attached to the three sides of the lid body 11 corresponding to the remaining three sides. In addition, the first claw portion 35 may be formed on any two or three sides of the four sides of the annular groove 21, and the reinforcing plates may be attached to two or one sides of the lid body 11 corresponding to the remaining two or one sides. Furthermore, the first claw portion 35 may be formed on all four sides of the annular groove 21, eliminating the need to attach the reinforcing plates.

[0067] In the embodiment, a reinforcing plate having a bent portion 41 is attached to the edge of the lid body 11 corresponding to the edge portion not having the first claw portion 35, thereby holding the gasket 13 in that edge portion. However, the gasket 13 may also be held in that edge portion by using other parts than the reinforcing plate, or in some cases by using an adhesive.

[0068] In the embodiment, the second claw portions 37 are formed on all of the first to fourth curved portions 23a to 23d at the four corners of the annular groove 21, but the present invention is not limited to this configuration. For example, the second claw portions 37 may be formed only on two curved portions located at both ends of the side portion on which the first claw portions 35 are formed among the first to fourth curved portions 23a to 23d, or the second claw portions 37 may not be formed on any of the first to fourth curved portions 23a to 23d. In the curved portions on which the second claw portions 37 are not formed, an engagement plate having an engagement portion that can engage with the lower surface of the eaves portion 29 inserted into the curved portion can be separately attached to the lid main body 11.

[0069] In the embodiment, nine first claws 35 are distributed at equal intervals over the entire length of the side portion, and three second claws 37 are distributed at equal intervals over the entire length of the curved portion, but the present invention is not limited to this configuration. The number and arrangement of the first claws 35 and second claws 37 can be appropriately set so that the claws can hold the packing 13 in the annular groove 21 with a predetermined strength. Similarly, the proportion of the first claws 35 in the side portion can be appropriately set so that the claws can hold the packing 13 in the annular groove 21 with a predetermined strength.

[0070] In the embodiment, the packing 13 is an endless ring-shaped body, but it may be an endless ring-shaped body. Also, the packing 13 has an upper end piece 31 that extends above the eaves portion 29, but the upper end piece 31 may be eliminated. The shape of the packing body 25 may also be appropriately changed. [Industrial Applicability]

[0071] The present invention can be used, for example, in dishwashers, dishwashers and dryers with a drying function, kitchen equipment, and the like. [Explanation of symbols]

[0072] 1. Dishwasher 3. Housing 3a…Front opening 5. Cleaning tank 5a…Top opening 7…Lid body 9…Top edge 11…Lid body 13...Packing 15a~15c...1st~3rd reinforcement plate 17a...Left side 17b...Right side 17c…Front side 17d…rear side 19…Bottom edge 21...Annular groove 21a…Left side 21b…Right side 21c...front part 21d... Posterior part 23a to 23d: 1st to 4th curved portions 25…Packing body 27...Standing part 29…Eaves 33…Outer edge 35...First claw part 37…Second claw part 41…Bending part 43…First vertical wall 45…First rear vertical wall 49…Second rear vertical wall

Claims

1. A housing having a front opening; a cleaning tank that is housed in the housing and can be pulled out forward from the front opening, and has a top opening for inserting and removing an object to be cleaned; a cover supported in an upper portion of the housing so as to be movable up and down, and which descends to close the top opening when the washing tub is pushed into the housing, the lid body is substantially rectangular with four sides, namely, left and right sides extending in a front-rear direction of the lid body, and front and rear sides extending in a left-right direction of the lid body, and includes a lid body having an annular groove on a bottom surface peripheral edge portion, and a gasket attached to the annular groove for sealing between the top surface peripheral edge portion of the cleaning tank surrounding the top surface opening and the lid body closing the top surface opening, The packing has a packing body portion that abuts against the upper surface peripheral portion, a standing piece portion that extends upward from the packing body portion, and a visor portion that projects outward from the standing piece portion and is inserted into the annular groove, the annular groove has a substantially rectangular shape having four sides, that is, a left side and a right side extending in the front-rear direction, and a front side and a rear side extending in the left-right direction, A dishwasher characterized in that the lid body has a claw portion on at least one of the four sides that protrudes inward from the underside of the outer edge of the annular groove and engages with the underside of the eaves portion inserted into that side of the annular groove.

2. The annular groove has four arc-shaped curved portions at four corners connecting the adjacent side portions, 2. The dishwasher according to claim 1, wherein said lid body has said claws on each of said curved portions.

3. 3. The dishwasher according to claim 1, wherein the claw portion is a plurality of claws spaced apart from one another.

4. The dishwasher according to claim 3, which relies on claim 2, wherein the distance between adjacent claw portions is smaller on the curved portion than on the side portions.

5. A reinforcing plate is attached to an edge of the lid body corresponding to an edge portion on which the claw portion is not formed, among the four edge portions; 5. The dishwasher according to claim 1, wherein the reinforcing plate has a bent portion bent inwardly from a lower end thereof and adapted to engage with a lower surface of the visor portion inserted into the corresponding side portion of the annular groove.

6. 6. The dishwasher according to claim 5, wherein the reinforcing plate is attached to the front edge of the lid body, and the bent portion of the reinforcing plate extends continuously in the extending direction of the reinforcing plate.

7. The claw portion is formed on the rear side portion, The lid body is a first vertical wall that is annular and is provided inside the annular groove and extends downward from the annular groove; 7. The dishwasher according to claim 1, further comprising: a second rear vertical wall disposed inside a first rear vertical wall of a portion of the first vertical wall corresponding to the rear edge portion, near a rear wall of the washing tank stored within the main body, and extending downward below a lower surface of the first rear vertical wall.

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