JPH0710700Y2 - Dishwasher - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher in which dishware before and after washing can be taken in and out through an opening provided on the upper side of a washing tank having a jet nozzle at the bottom.

[0002]

2. Description of the Related Art A dishwasher for loading and unloading dishes through an opening provided on the upper side of a washing tank is, for example, an actual Kaihei 1-12.
There are those disclosed in Japanese Patent No. 8750, Japanese Utility Model Laid-Open No. 1-138257, and the like.

[0003]

However, in the dishwasher disclosed in Japanese Utility Model Laid-Open No. 1-128750,
An opening / closing door that covers the opening provided on the upper side of the cleaning tank at the time of cleaning is attached to the rear end of the opening so as to be rotatable upward at the rear end. Since the opening / closing door opens upward, it requires an upper space corresponding to its movable range,
Therefore, there is a problem that the installation place of the dishwasher is limited. Further, in the dishwasher disclosed in Japanese Utility Model Laid-Open No. 1-138257, since the opening / closing door that opens and closes the opening provided on the upper side of the cleaning tank is configured by a bendable opening / closing shutter, the opening / closing shutter and its guide The frictional resistance of the contact portion with the rail inevitably increases, and smooth opening and closing cannot be expected.

As a means for solving such a problem, an opening / closing door having a top plate having an arcuate cross-section in the front-rear direction and side plates extending inward from both sides thereof is made rotatable in the circumferential direction of the arc of the top plate. It is conceivable to move the open / close door between a closed position where the opening is closed and an open position where the door is housed in the rear part of the cleaning tank. In such a case, the gap between the both side walls of the cleaning tank and the both side plates of the opening / closing door cannot be unnecessarily made small in order to prevent contact during operation. Rinsing hot water may splash outside through this gap, and some sort of waterproof structure is required. In particular, a waterproof structure for this purpose is required near the lower injection nozzle, and thus near the inner edge of the side plate that has just been jetted and is hit by strong hot water.

As a waterproof structure for this kind of door, a structure using an elastic packing as disclosed in Japanese Utility Model Laid-Open No. 51-15063 and a structure disclosed in Japanese Utility Model Laid-Open No. 61-201662 are used. There is a structure in which the tip edge of the other member is inserted into the U-shaped groove. However, in the case of the structure in which the opening / closing door is housed in the cleaning tank in the closed position as described above, the side plate of the opening / closing door and the side wall of the cleaning tank move relative to each other in parallel with each other, so that the structure with the elastic packing is constantly rotated. There is a problem that frictional resistance occurs and the operation becomes heavy. Further, since the structure using the U-shaped groove easily collects dust and the like inside it and it is difficult to remove the accumulated dust and the like, it is not preferable as a dishwasher requiring cleanliness. there were. The present invention aims to solve each of these problems.

[0006]

To this end, in the dishwasher according to the present invention, as shown in the accompanying drawings, an injection nozzle for injecting washing water or rinsing water upward is provided in the lower portion of the washing tank. A dishwasher in which the dishes to be washed are housed inside from the opening provided on the upper side of the washing tank and the dishes can be taken out upward after the washing is completed, and the cross-sectional shape in the front-rear direction is substantially Has a circular arc-shaped top plate and a pair of side plates that extend inward from both sides of the top plate and are arranged substantially parallel to the inner surfaces of the left and right side walls of the cleaning tank. An opening / closing door that is rotatably provided and that reciprocally rotates between a closed position that closes the opening and an open position that is housed in a rear portion of the cleaning tank is provided, and the inner end edges of the side plates are the same. First plate-like portion extending from the inner edge toward the corresponding side wall and the first plate Second from the distal edge parts extending parallel to further inward and some with a gap the side wall between the side walls
It is characterized in that an L-shaped water leakage preventing portion formed of a plate portion is integrally formed.

Further, it is preferable that the opening / closing door is pivotally supported on the cleaning tank through an arm attached to each side plate so that the opening / closing door can be rotated substantially in the circumferential direction of the arc.

[0008]

The tableware stored in the washing tank is washed with washing water and rinsing water sprayed from the lower spray nozzle with the opening / closing door closed. The second plate-like portion of the water leakage prevention part provided on the inner edge of the side plate where the sprayed water hits vigorously near the lower spray nozzle is located between the side wall of the cleaning tank and the side plate of the opening / closing door. Since the gap between the two is small, the amount of washing water or rinsing water splashing outside through this portion is greatly reduced. Since the second plate-shaped portion has a smaller area than the side plate, even if the gap between the second plate-shaped portion and the side wall of the cleaning tank is small, the second plate-shaped portion is unlikely to come into contact with the side wall. When the opening / closing door is pivoted rearward and opened, the opening / closing door is stored in the rear part of the cleaning tank, and the upper opening is almost entirely opened. In this state, the tableware is taken in and out.

[0009]

As described above, according to the present invention, when the opening / closing door is opened, the upper opening is almost entirely opened, so that not only the dishes can be easily taken in and out, but also the opening / closing door is opened. Since it is stored in the rear part of the washing tank, it does not project above the dishwasher, which makes it easier to select the installation location of the dishwasher and effectively use the space above it. Becomes Further, the water leakage prevention portion provided on the inner edge of the side plate of the opening / closing door can significantly reduce the washing water or the rinsing water splashing from the dishwasher to the outside. Since the water leakage prevention portion has an L-shaped cross section, dust and the like are less likely to collect, and the dust and the like can be easily removed by cleaning. Further, the opening / closing door has a substantially circular arc-shaped cross section in the front-rear direction and is rotatable in the substantially circumferential direction of the arc, so that the opening / closing is smooth.

Further, according to the one in which the opening / closing door is pivotally supported on the cleaning tank via the arm attached to each side plate, the operation of the opening / closing door becomes lighter and smoother, and water leakage provided on the inner edge of the side plate is prevented. Since the movement of the prevention portion in the width direction is reduced, the gap between the second plate-shaped portion and the side wall of the cleaning tank can be reduced to further reduce the amount of hot water splashing to the outside.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the accompanying drawings will be described below.
As shown in FIGS. 1 and 2, the washing machine body 10 has a rectangular box shape, and an opening / closing door 20 is provided in an opening O on the upper side thereof. A cleaning tank 30 is fixed on the machine frame 11 of the main body 10 of the cleaning machine.
And a back plate 13, and a pair of left and right side plates 14
It is covered with a and 14b. The cleaning tank 30 includes a bottom plate 31 made of a stainless steel plate or the like, left and right side walls 32, 33,
The front wall 34 and the back wall 35 are liquid-tightly connected to each other, and are in the shape of a rectangular box having an open upper surface. A wash water tank 37 formed continuously with the bottom plate 31 and the side wall 33 is provided on one lower side of the wash tank 30 so as to project downward. The upper edges of the front plate 12, the rear plate 13, and the side plates 14a, 14b are connected to the upper edges of the walls 32, 33, 34, 35 of the cleaning tank 30, and the front opening frame 17 and the rear opening frame are connected. 16 and the side opening frames 15a and 15b. These opening frames 15a, 15b, 16 and 17 form an opening portion O that opens most of the top surface of the cleaning tank 30 except the rear portion. From both side walls 32 and 33 of the cleaning tank 30,
A pair of support rails 36, each of which includes a support plate portion 36a and a rail portion 36b, and which supports a rack R that houses the tableware P, is fixed so as to project inward.

As shown in FIGS. 1 and 2, the opening / closing door 20 has a top plate 21 having an arcuate cross-section in the front-rear direction, and an inward direction parallel to the inner surfaces of both side walls 32 and 33 of the cleaning tank 30 from both side edges thereof. It is made of sheet metal consisting of a pair of side plates 22 and 23 extending in the direction of. The boss portion 62 on the proximal end side of the pipe arm 63 fixed to the inner surface of the left side plate 22 is pivotally supported by the tubular portion 61 of the hollow bracket 60 fixed to the side wall 32 of the cleaning tank 30, while being attached to the inner surface of the right side plate 23. The base end of the fixed arm 70 is fixed to a support shaft 72 pivotally supported by a bearing member 71 fixed to the side wall 33. The axis of each cylinder portion 61 and the support shaft 72 is the top plate 21.
It almost coincides with the center of the arc of the, and this allows the door 2
0 is rotatably supported along the arc of the top plate 21 in a substantially circumferential direction. . When the door 20 is rotated counterclockwise as shown by the solid line in FIG. 1, the front edge of the door 20 abuts on the door packing 80 provided on the front wall 34 to close the opening O, and two points are formed. In the state of being rotated clockwise as shown by the chain line, the rear end contacts the bottom plate 31 to open almost the entire surface except the rear part of the opening O. A U-shaped handle 25 is fixed on the outer surface of the front part of the top plate 21 in parallel with the front edge, and a window glass 24 for viewing the inside is provided slightly behind the handle 25. Inside the left and right side plates 22 and 23, cover plates 26 and 27 having almost the same shape as those are provided on the pipe arm 63.
And to hide the arm 70.

As shown in FIGS. 1 to 3, a water leakage preventing portion 28 is integrally formed on the inner edge of each side plate 22, 22 of the opening / closing door 20 (the lower edge in the closed state shown by the solid line in FIG. 1). ing. Each water leakage prevention part 28 extends from the inner edge of each side plate 22, 23 toward the corresponding side wall 32, 33.
8a and a second plate-like portion 28b that extends further inward in parallel with this with a slight gap between the tip edge thereof and the side walls 32, 33. It is bent and formed into an L-shaped cross section. Each side plate 22,
The inverted L-shaped rear edge and the inclined front edge of 23 (see FIG. 1) are provided with inward bent portions (see reference numeral 23a of FIG. 4).

As shown in FIGS. 1 to 4, the side plates 22 and 2 are
Slide members 29 that project toward the side walls 32 and 33 of the cleaning tank 30 are provided at the front and rear portions of the cleaning tank 3. As shown in FIGS. 3 and 4, the slide member 29 is composed of a flange portion 29a and a protruding portion 29b, and is integrally formed of a synthetic resin having a small friction coefficient against metal and abrasion resistance. The slide member 29 is formed into a hemispherical shape by inserting the protruding portion 29b of the slide member 29 into the holes 23b provided in the front and rear portions of the side plates 22 and 23 from the inside and screwing and fixing it to the side plates 22 and 23 via the flange portion 29a. The tip of the protruding portion 29b is slidably abutted on the inner surfaces of the side walls 32 and 33 of the cleaning tank 30 at all positions of the rotation of the opening / closing door 20.

The cover plates 26 and 27 are fixed to the side plates 22 and 23 of the opening / closing door 20 from the inside by mounting screws (not shown). As shown in FIGS. 3 and 4, the bent portions 2 of the rear edges of the side plates 22 and 23 are provided at the rear edges of the cover plates 26 and 27.
A third plate-shaped portion 28c that overlaps with 3a is bent, and the side walls 32, 33 are formed from the tip edge thereof similarly to the second plate-shaped portion 28b.
A fourth plate-like portion 28d extending rearward in parallel with this is bent and formed with a slight gap therebetween.

As shown in FIGS. 1 and 2, the lower nozzle bearing 50 fixed to the upper surface of the bottom plate 31 of the cleaning tank 30 at the substantially central portion thereof.
Includes a cleaning spray nozzle 51 and a rinse spray nozzle 52.
However, each of them is independently rotatably supported in two stages. A rinse hot water tank 38 is provided in addition to the wash hot water tank 37 in the main body 10 of the washing machine below the bottom plate 31.
The cleaning pump 40 provided in the lower portion of the main body of the cleaning machine 10 supplies the cleaning hot water sucked from the cleaning hot water tank 37 through the suction pipe 41 to the lower nozzle bearing 50 through the cleaning hot water supply pipe 42, and also the rinsing pump 45. Supplies the rinse water sucked from the rinse water tank 38 through the suction pipe 46 to the protrusion 50a of the lower nozzle bearing 50 through the rinse water supply pipe 47. Although illustration is omitted, the inside of the lower nozzle bearing 50 is divided into an inner and outer double space, and the wash water from the wash water supply pipe 42 is supplied into the washing injection nozzle 51 through the outer space to supply the rinse water supply pipe. The rinsing water from 47 is supplied into the rinsing injection nozzle 52 through the protrusion 50a and the inner space. A large number of nozzle holes are formed on both blades of each of the injection nozzles 51, 52, which are diagonally upward and are substantially orthogonal to the radial direction passing through the center of the lower nozzle bearing 50. The washing water and the rinse water are jetted obliquely upward, respectively. It also rotates due to the reaction force of the injection. As shown in FIG. 2, a filter 39 is provided between the cleaning tank 30 and the cleaning hot water tank 37 to remove the residual food accompanying the cleaning of the tableware P.

As shown mainly in FIG. 5, an overflow pipe 43 (the protruding portion is not shown) protruding upward in the hot water tank 37 is connected to a drain pipe 44 via a three-way branch tool 43a. The lower portion of the suction pipe 41 is connected to the three-way branch tool 43a via a drain cock 44a which is opened and closed by a drain lever (not shown). A hot water supply pipe 48 is connected to an upper portion of the rinse hot water tank 38 via a hot water supply valve 48a, and a bottom portion of the rinse hot water tank 38 is connected to an intermediate portion of an overflow pipe 49 connected to a slightly lower portion thereof via a drain cock 49a. There is.

As shown in FIGS. 2 and 5, a hollow bracket 60 having an integrally formed cylindrical portion 61 is fixed to the inner surface of the side wall 32 on the left side of the cleaning tank 30. A pair of hot water supply pipes 53A and 53B are provided between the lower nozzle bearing 50 and the connecting member 54 that is liquid-tightly attached to the lower surface of the hollow bracket 60 via a gasket. The hot water supply pipe 53A communicates the outer space of the lower nozzle bearing 50 with the internal space of the hollow bracket 60 via a check valve (not shown) built in the connecting member 54, and the hot water supply pipe 53B is lower. The inner space of the nozzle bearing 50 communicates with the inner space of the hollow bracket 60 via a check valve that is separate from the above and is built in the connecting member 54. As a result, part of the wash water and the rinse water supplied to the lower nozzle bearing 50 are separately supplied to the hollow bracket 60. The support rail 3
The rail portion 36b of No. 6 is provided over the entire length of the rack R in the front-rear direction, but the support plate portion 36a is interrupted at a portion corresponding to the hollow bracket 60.

The boss portion 62 fixed to the base end side of the pipe arm 63 is rotatably fitted in a substantially liquid-tight manner with the outer peripheral surface of the tubular portion 61 of the hollow bracket 60. The inner space of the hollow bracket 60 is the pipe arm 6
It communicates with the inside of 3. The pipe arm 63 has a portion fixed to the side plate 22 on the left side of the opening / closing door 20 that extends in the radial direction and is then bent along the inner surface of the top plate 21 to be fixed to the tip end that reaches almost the center of the top plate 21. An upper injection nozzle 66 is rotatably supported by the bearing 64. Both blades of the upper injection nozzle 66 are slightly downwardly bent as shown in the drawing, and a large number of nozzle holes are formed obliquely downward, which are substantially orthogonal to the radial direction passing through the center of the upper nozzle bearing 64. The washing water and the rinsing water supplied through the pipes 53A and 53B, the connecting member 54, the hollow bracket 60, the tube portion 61, the boss portion 62, the pipe arm 63 and the upper nozzle bearing 64 are jetted obliquely downward, and the reaction force of the jetting is exerted. The upper jet nozzle 66 is thereby rotated.

As shown in FIGS. 2 and 5, a bearing member 71 is fixed to the inner surface of the right side wall 33 of the cleaning tank 30 coaxially with the tubular portion 61 of the hollow bracket 60. A base end portion of the arm 70 fixed to the right side plate 23 of the opening / closing door 20 is screwed and fixed to a tip end of a support shaft 72 rotatably supported by a bearing member 71. Two springs 75 are stretched between a lever 73 fixed to the outer end of the support shaft 72 by welding or the like and a locking piece 74 fixed to the outside of the side wall 33.
This reduces the change in the operating force of the open / close door 20 due to the movement of the center of gravity due to the rotation of the open / close door 20.

When the dishwasher of the above-mentioned embodiment is used to wash the dirty dishes P, the washing pump 40 is operated and the washing water in the washing water tank 37 is supplied to the lower nozzle bearing 50 and the upper nozzle bearing 64. It is supplied and sprayed toward the tableware P from the cleaning spray nozzle 51 and the upper spray nozzle 66 to clean it. The wash water after washing is collected in the wash water tank 37, sucked again by the washing pump 40, and repeatedly used. When the cleaning is completed, the cleaning pump 40 is stopped and the rinsing pump 45 is operated. The rinsing pump 45 supplies the rinsing hot water in the rinsing hot water tank 38 to the lower nozzle bearing 50 and the upper nozzle bearing 64, and sprays it toward the tableware P from the rinsing injection nozzle 52 and the upper injection nozzle 66 to rinse it. Remove hot water with. The rinse water after use is collected in the wash water tank 37, and is discharged to the outside through the overflow pipe 43 and the drainage pipe 44 when it exceeds a predetermined liquid level. When the rinsing is completed, the rinsing pump 45 is stopped. The hot water remaining in the wash water tank 37 is normally used for the next wash, but if the drain cock 44a is opened by the drain lever 44b provided on the front surface of the washing machine body 10, the hot water will pass through the three branch tool 43a and the drain pipe 44. Is discharged.

In the cleaning or rinsing state, mainly in FIG.
As shown in FIG. 3, the cleaning jet nozzle 51 or the rinsing jet nozzle 52, especially the washing hot water or the rinsing hot water that has just been jetted from the vicinity of the tip end of the washing jet nozzle 51 or the rinsing hot water, is used for each side plate 2 of the opening / closing door 20.
It hits vigorously near the inner edges of 2,23. However, the side walls 32 and 33 of the cleaning tank 30 and the side plates 22 and 23 are smaller than the gaps between the side walls 32 and 33, and the second plate-shaped portions 28.
The hot water that has jumped into the gap between b first hits the side walls 32 and 33 and then bounces, then immediately hits the second plate-shaped portion 28b and bounces, and this is repeated to repel the momentum. Therefore, water leakage from the inner edges of the side plates 22 and 23 is greatly reduced. The inverted L-shaped rear edge and the inclined front edge of each side plate 22 and 23 are separated from each injection nozzle, and the injected hot water plunges at an angle that makes it difficult to enter the gap between the side walls 32 and 33. There is little water leakage. Therefore, the third and plate-shaped portions 28c and 28d provided on the cover plates 26 and 27 do not necessarily have to be provided.

In this embodiment, the opening / closing door 20 is held by the handle 25.
When is rotated rearward, the opening / closing door 20 and the upper injection nozzle 66 attached to the opening / closing door 20 are housed in the rear portion of the cleaning tank 30. As a result, the opening O on the upper side of the main body of the washing machine 10 is almost entirely opened, so that the rack R accommodating the tableware P can be easily taken in and out of the washing tank 30. Further, since the opening / closing door 20 does not project upward when the opening O is opened, it is easy to select the installation location of the dishwasher, and the upper space can be effectively used. Further, since the opening / closing door 20 is pivotally supported by the tubular portion 61 and the support shaft 72, the operation is smooth.

In this embodiment, slide members 29 slidably contacting the side walls 32 and 33 are provided at the front and rear portions of the side plates 22 and 23 to regulate the lateral movement of the side plates 22 and 23. As a result, the second plate-shaped portion 2 of each water leakage prevention portion 28
8b is prevented from contacting the side walls 32 and 33. However, since the second plate-shaped portion 28b has a smaller area than the side plates 22 and 23 and is close to the hollow bracket 60 and the bearing member 71, which are the supporting portions for the cleaning tank 30, the slide member 29 is not always required. The second plate-shaped portion 28 without providing
The contact between b and the side plates 22 and 23 can be prevented. Further, since the water leakage prevention portion 28 has an L-shaped cross-section, dust and the like are less likely to collect, and can be easily removed by cleaning.

In the above embodiment, the top plate 21 has an arcuate cross-sectional shape in the front-rear direction, but this cross-sectional shape may be substantially arcuate, for example, a cross-sectional shape forming a part of a regular polygon or A cross-sectional shape in which a plurality of points on a substantially arc are connected by a straight line may be used. Further, in the above embodiment, the supply pipes for supplying the wash water and the rinse water to the upper injection nozzle 66 via the upper nozzle bearing 64 are partially shared and provided on one side.
The present invention can also be implemented by providing the hollow bracket 60, the boss portion 62, the pipe arm 63 and the like on both left and right sides, and completely separating the supply pipe lines for the wash water and the rinse water.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a dishwasher according to an embodiment of the present invention as viewed from the side.

FIG. 2 is an overall sectional view of the embodiment of the present invention seen from the front side.

FIG. 3 is an enlarged cross-sectional view showing a structure of a water leakage prevention unit and its vicinity according to an embodiment of the present invention.

FIG. 4 is an enlarged 4-4 cross-sectional view of FIG.

FIG. 5 is a perspective view showing the outline of the entire structure of the embodiment of the present invention.

[Explanation of symbols]

20 ... Opening / closing door, 21 ... Top plate, 22, 23 ... Side plate, 28 ...
Water leakage prevention part 28a ... First plate-shaped part, 28b ... Second plate-shaped part, 30 ... Cleaning tank, 32, 33 ... Side wall, 51, 52 ... Injection nozzle (cleaning injection nozzle, rinsing injection nozzle),
63, 70 ... Arms (pipe arms, arms), O ... Openings, P ... Tableware.

Claims (2)

[Scope of utility model registration request] 1. An injection nozzle for injecting washing water or rinsing water upward is provided in a lower portion of the washing tank, and the dishes to be washed are accommodated inside from an opening provided on the upper side of the washing tank. In a dishwasher capable of taking out the dishes above after completion of washing, a top plate having a substantially arcuate cross-section in the front-rear direction and the left and right side walls of the washing tank extending inward from both sides thereof. It has a pair of side plates that are arranged substantially parallel to the inner surface, and is rotatably provided in a substantially circumferential direction of the circular arc and is housed in a closed position for closing the opening and a rear part in the cleaning tank. A first plate-shaped portion extending from the inner edge toward the corresponding side wall at the inner end edge of each of the side plates, and the first plate-shaped portion. Extending inward in parallel with the side wall with a slight gap from the leading edge of the part to the side wall A dishwasher characterized by integrally forming a water leakage prevention part having an L-shaped cross-section formed of a second plate-shaped part. 2. The dishwasher according to claim 1, wherein the opening / closing door is pivotally supported in the washing tank via an arm attached to each of the side plates, and is thereby rotatable in a substantially circumferential direction of the arc. Machine.