JP2008284135A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To devise an opening and closing mechanism of the inner lid so that sealability does not become unstable because the packing of the inner lid is dragged and collapsed in an unstable state when closely sealing the upper opening portion of the washing tank with the inner lid while pushing the washing tank into a washing machine body. <P>SOLUTION: A dishwasher includes the washing machine body 11, the washing tank 20 movable in a fore and aft direction to the washing machine body and having the upper opening portion, the inner lid 30 provided with the packing 35 and opening and closing the upper opening portion of the washing tank, and the inner lid opening and closing mechanism opening and closing the inner lid. The inner lid opening and closing mechanism is provided with: a pair of side end plates 31 supported movably only in a vertical direction in the inner upper portion of the washing machine body and biased upward, pushing down mechanisms 26, 27, 32, 33 secured movably only in a fore and aft direction to the pair of side end plates and moving the pair of side end plates downward as the forwardly biased inner lid and the washing tank moves rearward, and a pushing in mechanism 20b, 30b moving the inner lid rearward along with the washing tank. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tableware washing machine that performs cleaning, rinsing, drying, and the like of tableware and cooking utensils (hereinafter referred to as tableware), and more particularly, to an opening / closing mechanism of an inner lid that opens and closes an upper open portion of a cleaning tank.

In the built-in type drawer type dishwasher, the washing tub containing the dishes is pushed into the washing machine body, and the upper open part of the washing tub is sealed with the inner lid, followed by washing, rinsing, drying, etc. Tableware is washed and dried by performing each process.
As an opening / closing mechanism for the inner lid of the cleaning tank, for example, a mechanism using a link mechanism as described in JP-A-2002-143072 or JP-A-2003-518 is known. . The one using such a link mechanism is configured such that the inner lid is supported by four links provided on the front, rear, left, and right of the washing machine main body, and moves in the vertical direction while moving in the front-rear direction. ing. The inner lid is biased upward by a spring member so that when the cleaning tank is pushed rearward, the inner lid is pushed by the cleaning tank and moves rearward together.
With such a configuration, in the state where the external force does not act on the inner lid as in the case where the washing tank is pulled forward from the main body of the washing machine, the inner lid is pulled forward by the spring member, It is in the open position (up position) away from the upper open part of the cleaning tank. On the other hand, when the cleaning tank is pushed into the rear housing position of the cleaning machine body, the inner lid that engages with the cleaning tank is also moved rearward, and the four links rotate to move the inner lid rearward. Therefore, the inner lid is pressed to the lower rear side against the upper open portion of the cleaning tank to seal the upper open portion of the cleaning tank.

In a dishwasher that opens and closes the inner lid by such a link mechanism, it is actually difficult to evenly rotate the four links on the front, rear, left and right of the inner lid due to errors in production. Therefore, the pressure applied to the seal contacting the upper surface of the edge of the upper open portion of the cleaning tank cannot be made uniform, and there are portions that are strongly compressed and portions that are not. As a result, there arises a problem that washing water leaks from a portion that is not strongly compressed.
Further, since the inner lid is always urged upward by the spring member, in the final stage of the storing operation of pushing the washing tank into the main body of the washing machine, the washing tank is simultaneously locked while pushing the washing tank. Otherwise, there was a problem that the cleaning tank could not be moved to the accommodation position and the inner lid could not be sealed.
Therefore, a dishwasher that does not use the link mechanism as an opening / closing mechanism of the inner lid is described in Japanese Patent No. 3789775 ("Drawer-type dishwasher", Patent Document 1) so that such a problem does not occur. As has already been proposed.

The dishwasher described in the said patent document 1 is demonstrated referring FIGS.
[Configuration of conventional dishwasher]
As shown in FIG. 5, the dishwasher 10 described in Patent Document 1 has the front surface of the washing machine main body 11 open, and the washing tank 20 can be pulled out or pushed into the front opening portion 12. It is attached to. The washing tank 20 is formed in a box shape with the top opened, and a door 22 is provided on the front surface. The user takes out and puts tableware 40 into and from the cleaning tank 20 through the upper opening 21. A handle 22a is formed on the door 22 so that the user can move the cleaning tank 20 in the pushing direction or the drawing direction. When the cleaning tank 20 is pushed into the storage position, the inner lid (opening / closing lid) 30 provided in the upper part of the cleaning machine body 11 is lowered to close the upper open portion 21 of the cleaning tank 20. In FIG. 5, the left side is the front and the right side is the rear.
After the cleaning tank 20 is pushed into the cleaning machine main body 11 and returned to the storage position, the user operates the lock lever 24 provided on the door 22 to lock the cleaning tank 20 in the storage position. In this state, when the operation switch of the operation panel 23 provided on the front upper part of the door 22 is turned on, the operation of the dishwasher 10 is started, and each process such as washing, rinsing and drying is automatically executed. The tableware 40 stored in the cleaning tank 20 is cleaned and dried.

As shown in FIGS. 5 and 6, a pair of cleaning tank side rails 25, 25 extending in the front-rear direction are fixed to both lower side surfaces of the cleaning tank 20. A pair of main body side rails 16, 16 extending in the front-rear direction via a pair of supports 19, 19 are fixed to both lower inner side surfaces. In particular, as shown in FIG. 6 (b), the pair of body side rails 16 and 16 have a U-shaped cross section, and a roller 17 is a rotating shaft inside the U-shaped cross section. The cleaning tank side rail 25 is inserted into a gap formed between the roller 17 and the main body side rail 16.
With such a configuration, the cleaning tank 20 is guided by the pair of main body side rails 16 and 16 and can move in the front-rear direction, but the movement in the vertical direction is restricted.

A substantially flat inner lid 30 is disposed on the inner upper portion of the cleaning machine body 11. A packing (seal) 35 having a circular cross section is attached to the lower surface of the inner lid 30 along the outer periphery thereof. The packing 35 is made of an elastic material such as silicon rubber.
A pair of flat side end plates 31, 31 are vertically attached to both side ends of the inner lid 30, and a pair of front rollers ( Roller) 32 and rear roller (roller) 33, and a pair of central rollers (middle rollers) 34, 34 are rotatably mounted at the center. The pair of springs 13, 13 that are rod-shaped elastic bodies are supported by the respective support portions 14 formed at the inner side surfaces of the washing machine body 11 at the center, and both ends of the pair of springs 13, 13 are front and rear with respect to the inner lid 30. It is inserted in each spring hole 30a, 30a formed as a long hole in the direction.

In addition, a pair of guides 15, 15 having a U-shaped cross section and guiding the inner lid 30 in the vertical direction are fixed at the upper center of both inner side surfaces of the cleaning machine body 11. As shown in FIG. 6 (c), a central roller provided at the center of the pair of side end plates 31, 31 is disposed inside each U-shaped cross section of the pair of guides 15, 15. 34, 34 enters and is guided.
Thus, the inner lid 30 is urged upward by the pair of springs 13 and 13 and the movement in the moving direction (front-rear direction) is restricted by the pair of guides 15 and 15. The inner lid 30 is raised and lowered while being guided in the vertical direction.
As shown in FIGS. 5 (b) and 6 (a), a pair of front cams (guide blocks) 26 and a rear cam are provided on both outer portions of the front and rear ends of the cleaning tank 20, respectively. A (guide block) 27 is provided. Each of these cams 26 and 27 is engaged with the pair of front and rear rollers 32 and 33, and as shown in FIG. A surface 27a and a parallel surface 27b parallel to the moving direction are provided.
The inclined surface and the parallel surface of the front cam 26 are not described with reference numerals, but have the same shape as the inclined surface 27a and the parallel surface 27b of the rear cam 27.

[About the opening and closing operation of the inner lid in a conventional dishwasher]
When the washing tub 20 is pulled out from the washing machine main body 11, the front and rear cams 26 and 27 are not engaged with the front and rear rollers 32 and 33 as shown in FIG. The inner lid 30 is urged upward by the spring 13 and is guided in the vertical direction by the guide mechanism comprising the guide 15 and the central roller 34, so that it is moved to the upper open position.
On the other hand, when the cleaning tank 20 is pushed toward the storage position, the inclined surface 27a of the rear cam 27 formed in the cleaning tank 20 is paired with the inner lid 30 as shown in FIG. When the rear roller 33 provided on the side end plates 31 and 31 is approached and the cleaning tank 20 is further pushed into the storage position, the inclined surface 27a and the rear roller 33 are engaged.
Although only the operation of the rear cam 27 and the rear roller 33 will be described here, the same operation is performed for the front cam 26 and the front roller 32 as well.

As described above, the cleaning tank side rail 25 of the cleaning tank 20 is inserted into the main body side rail 16, and the vertical movement of the cleaning tank 20 is restricted, so that the inclined surface 27 a and the rear roller 33 are When engaged, a downward force acts on the inner lid 30 via the rear roller 33, and the inner lid 30 guides the pair of guides 15, 15 against the urging force of the pair of springs 13, 13. And descends (see FIG. 7B). In such a state, the biasing force of the spring 13 applies a forward force to the inclined surface 27a via the rear roller 33, so that the user faces the cleaning tank 20 toward the accommodation position against this force. It is necessary to push in.
When the inner lid 30 is lowered, the bending of the pair of springs 13 and 13 increases, so that the length of the springs 13 and 13 in the front-rear direction (distance between both ends) decreases. Since the spring holes 30a, 30a into which both ends of the springs 13, 13 are inserted are elongated holes, they are absorbed.

  When the cleaning tank 20 is further pushed in and reaches the accommodation position, the rear roller 33 moves to the parallel surface 27b of the rear cam 27 as shown in FIG. Then, the inner lid 30 is uniformly pressed against the edge upper surface 20 a of the upper open portion 21 of the cleaning tank 20, and the cleaning tank 20 is sealed by the packing 35 attached to the inner lid 30. In such a state, the inner lid 30 is guided by the pair of guides 15 and 15 and is strongly pressed in the vertical direction against the upper open portion of the cleaning tank 20. When the rear roller 33 is engaged with the parallel surface 27b, the urging force of the spring 13 applied to the parallel surface 27b via the rear roller 33 acts perpendicularly to the parallel surface 27b. No component force is generated. As a result, the cleaning tank 20 is stable in the storage position and is not pushed back in the drawing direction, so that when the user locks the cleaning tank 20 in the storage position, while holding the cleaning tank 20 in the storage position, At the same time, there is no need to perform the troublesome operation of operating the lock lever 24 to lock the cleaning tank 20.

According to such a configuration, the relative positional relationship between the inner lid 30 and the cleaning tank 20 in the closed position is such that the front and rear cams 26 and 27, the front and rear rollers 32 and 33, and the rollers 32 and Since these members are relatively easy to ensure accuracy, the relative positional relationship between the inner lid 30 and the cleaning tank 20 in the closed position is stable. Also, variation between products can be kept small.
Japanese Patent No. 3789775 (Japanese Patent Laid-Open No. 2002-360495)

  As already described, the dishwasher 10 described in Patent Document 1 includes an inner lid 30 that is guided only in the vertical direction by the guide 15 in the final stage in which the cleaning tank 20 is pushed toward the storage position. The packing 35 attached to the inner lid 30 is brought into pressure contact with the upper surface 20a of the edge of the cleaning tank 20 by being lowered by the action of the front and rear cams 26, 27 provided in the cleaning tank 20. The upper open part 21 of the tank 20 is sealed. When the operation of the inner lid 30 is viewed in detail, the following (1) to (4) are obtained.

(1) When the cleaning tank 20 is pushed backward from the state where the cleaning tank 20 is drawn out from the cleaning machine body 11 (see FIG. 5) toward the storage position, the inclined surface 27a of the rear cam 27 of the cleaning tank 20 is Until only the rear roller 33 provided on the side end plate 31 of the inner lid 30 comes into contact, only the cleaning tank 20 is moved backward. At this time, the inner lid 30 is held in the upper open position. (Fig. 7 (a), Fig. 8 (a))
(2) After the inclined surface 27a of the rear cam 27 comes into contact with the rear roller 33, when the cleaning tank 20 is moved further rearward, the rear roller 33 is pressed by the inclined surface 27a. Is guided vertically by the guide 15 and descends vertically. As a result, the packing 35 of the inner lid 30 comes into contact with the edge upper surface 20 a of the cleaning tank 20. (Fig. 7 (b), Fig. 8 (b), (c))
(3) When the washing tub 20 is moved further rearward from the state (2), the inner lid 30 is further lowered vertically by the action of the rear cam 27 and the rear roller 33, and therefore the packing 35 of the inner lid 30 is provided. Is dragged while being crushed by the edge upper surface 20a of the cleaning tank 20 moving rearward in the horizontal direction. (Fig. 8 (c), (d))
(4) When the cleaning tank 20 reaches the storage position, the rear roller 33 engages with the parallel surface 27b of the rear cam 27, compresses the packing 35 by a predetermined crushing amount, and opens the cleaning tank 20 upward. The part 21 is sealed. (Fig. 7 (c), Fig. 8 (d))

Thus, in the final stage where the cleaning tank 20 is pushed toward the housing position in the cleaning machine body 11, the packing 35 attached to the inner lid 30 contacts the edge upper surface 20a of the cleaning tank 20 while descending vertically. After that, it is dragged backward in the horizontal direction while being crushed by the edge upper surface 20a.
Further, as shown in FIG. 8E, the packing 35 of the inner lid 30 is formed in an arcuate rectangular shape along the edge upper surface 20a of the cleaning tank 20, The drag direction in each part of the packing 35 is different. That is, in the packing 35, in the “A” region which is a straight portion of both side portions extending in the front-rear direction, “B” which is dragged in the longitudinal direction but is the straight portion of the front-rear portion extending in the left-right direction. In the region, the region is dragged in a direction orthogonal to the longitudinal direction. Further, in the “c” region, which is an arc portion (four locations) that communicates between the linear portions of the both side portions and the front and rear portions, it is dragged in different directions with respect to the center line of the packing 35 at each location.

As described above, in the dishwasher 10 described in Patent Document 1, when the upper open portion 21 of the washing tub 20 is sealed with the inner lid 30, the inner lid 30 can move in the vertical direction. It is impossible to move in the direction, and the packing 35 attached thereto is dragged backward in the horizontal direction while being crushed as described above. There arises a problem that the sealing performance becomes unstable with respect to the deviation and water leakage occurs.
Further, since the packing 35 of the inner lid 30 is dragged in the horizontal direction on the edge upper surface 20a of the cleaning tank 20 and crushed in a non-uniform state, there arises a problem that it is easily damaged and inferior in durability.
Therefore, in order to solve the above-mentioned problems, the present invention pushes the cleaning tank into the main body of the cleaning machine and seals the upper open part of the cleaning tank with the inner cover, so that the packing of the inner cover is dragged. It is to devise an open / close mechanism for the inner lid so that the sealability is not unstable due to being crushed in a non-uniform state.

  In order to solve the above problems, a dishwasher according to the present invention has a pair of side end plates in which an opening / closing mechanism of the inner lid is supported so as to be movable only in the vertical direction with respect to the washing machine body, and the pair of side end plates. It consists essentially of an inner lid that is attached to the side end plate so as to be movable only in the front-rear direction.

(1) A dishwasher according to the present invention (corresponding to claim 1) is movable in the front-rear direction with respect to the washing machine main body, the washing machine main body, and includes a washing tub having an upper open portion, and a packing. Assuming a dishwasher mounted and comprising an inner lid that opens and closes the upper open portion of the washing tank, and an inner lid opening and closing mechanism that opens and closes the inner lid,
A pair of side end plates that are supported by the inner lid opening and closing mechanism so as to be movable only in the vertical direction at the inner upper part of the washing machine body, and are biased upward;
The inner lid that is attached to the pair of side end plates so as to be movable only in the front-rear direction and is biased forward;
Along with the backward movement of the cleaning tank, a pressing mechanism for moving the pair of side end plates downward, and a pushing mechanism for moving the inner lid backward together with the cleaning tank are provided. ,
When the cleaning tank is moved from the pulled-out state to the rear receiving position, the pair of side end plates are moved downward by the push-down mechanism, and the inner lid is moved rearward by the push-in mechanism. The upper open part of the cleaning tank is sealed with an inner lid.

  By being configured in this manner, when the cleaning tank is pushed toward the rear receiving position from the state where the cleaning tank is drawn forward, the pair of sides is moved by the operation of the push-down mechanism as the cleaning tank moves backward. The end plate is moved downward, and the inner lid is moved rearward on the pair of side end plates by the operation of the pushing mechanism. By such functions of the push-down mechanism and the push-in mechanism, the inner lid on which the packing is mounted is moved downward to approach the cleaning tank and is moved rearward together with (in synchronization with) the cleaning tank. By taking the timing of contact of the inner lid packing with the cleaning tank and the timing of starting the rearward movement of the inner lid, the packing is stable without causing uneven deformation such as twisting. Since the sealing property can be ensured, the upper open portion of the cleaning tank can be satisfactorily sealed with the inner lid.

(2) Further, in the dishwasher, the pair of side end plates are moved downward by the push-down mechanism, the timing when the packing attached to the inner lid comes into contact with the washing tank, and the push-in mechanism It is possible to synchronize the timing for starting the backward movement of the lid. (Corresponding to claim 2)
According to such a configuration, since the packing attached to the inner lid comes into contact with the cleaning tank and the movement of the inner lid to the rear is started, the inner lid is moved after the packing comes into contact with the cleaning tank. And the washing tank move backward together. As a result, the packing is only compressed from above by the inner lid and is not dragged in the front-rear direction, so that a stable sealing property can be ensured without causing uneven deformation such as twisting.
Further, since the inner lid moves only in the vertical direction until the packing comes into contact with the cleaning tank, it is possible to reduce the distance that the inner lid moves in the front-rear direction, and the volume of the cleaning tank is increased accordingly. Can be bigger.

  (3) Further, in the dishwasher, the push-down mechanism may be composed of a pair of cams provided in the washing tub and having an inclined surface and a parallel surface, and rollers provided on the pair of side end plates. it can. (Corresponding to claim 3)

(4) Moreover, in the dishwasher, the cleaning tank can be held in the storage position by forming a locking portion on the parallel surface of the cam in the push-down mechanism. (Corresponding to claim 4)
According to such a configuration, when the cleaning tank is pushed rearward to reach the storing position, the roller provided on the side end plate enters the locking portion of the cam provided in the cleaning tank. It is stably held in position and is not pushed back in the pull-out direction.

When the cleaning tank is pushed toward the rear receiving position, the pair of side end plates are moved downward, and the inner lid is moved rearward on the side end plates. As a result, the inner lid on which the packing is mounted is moved downward and is also moved rearward together with (in synchronization with) the washing tank. By taking the timing when the packing of the inner lid comes into contact with the cleaning tank and the timing when the inner lid starts to move backward, the packing is stable without causing uneven deformation such as twisting. Since the sealing property can be ensured, the upper open portion of the cleaning tank can be satisfactorily sealed with the inner lid.
In addition, by synchronizing the timing when the packing contacts the cleaning tank and the timing when the inner lid starts to move backward, the inner lid and the cleaning tank are combined together after the packing contacts the cleaning tank. Therefore, the packing is only compressed from above by the inner lid and is not dragged in the front-rear direction, thus ensuring a stable sealing property without causing uneven deformation such as twisting. be able to.

Further, since non-uniform deformation does not occur in the packing, the packing can be protected to prevent damage, and the durability can be increased.
Further, since the inner lid moves only in the vertical direction until the packing comes into contact with the cleaning tank, it is possible to reduce the distance that the inner lid moves in the front-rear direction, and the volume of the cleaning tank is increased accordingly. Can be bigger.
Further, when the cleaning tank is pushed backward to reach the storage position, the roller provided on the side end plate enters the locking portion of the cam provided in the cleaning tank, so that the cleaning tank can be stably held at the storage position. It can be held and is not pushed back in the pull-out direction.

Below, the dishwasher by the Example of this invention is demonstrated, referring FIGS. 1-4. The present invention is an improvement of the opening / closing mechanism of the inner lid in the conventional dishwasher described above, and other configurations are the same as those of the conventional dishwashing machine. Therefore, in the description of this embodiment, the opening / closing mechanism of the inner lid is used. The description of the common configuration will be omitted. Moreover, in description of this Example, the part which is common in the conventional dishwasher shown in FIGS. 5-8 is demonstrated using the same code | symbol.
First, the configuration of the opening / closing mechanism of the inner lid in the dishwasher according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic explanatory view of a dishwasher, in which (a) is a longitudinal sectional view of a state where a washing tank is accommodated, and (b) is a partially enlarged view of an opening / closing mechanism of an inner lid. FIG. 2 is a schematic diagram for explaining the main part of the dishwasher. (A) is a partial plan view of the washing machine main body with the upper part removed, and (b) shows the opening / closing mechanism of the inner lid. It is the elements on larger scale seen from the front side by cutting a part.

[Configuration of inner lid opening and closing mechanism]
The opening / closing mechanism of the inner lid of this embodiment includes a pair of guide holes 45 formed in the cleaning machine main body 11, a pair of front and rear cams 26 and 27, and a pressing portion 20b formed in the upper portion of the cleaning tank 20. A pair of side end plates 31 that are movable in the vertical direction and include three rollers 32 to 34, and are attached to the pair of side end plates 31 by elongated holes 38a and 38b and pins 36a and 36b in the front-rear direction. A pair of springs 13 provided in the washing machine main body 11 so as to apply an upward biasing force to the side end plates 31, and forward with respect to the inner lid 30. It is comprised from a pair of return spring 28 which gives the urging | biasing force of.

The washing tub 20 is substantially the same as that of a conventional dishwasher, and is supported by support rails 16 and 25 so that it can be pulled out or pushed in the front-rear direction with respect to the washing machine main body 11. A pair of front cams 26 and rear cams 27 that apply a downward force to each of the side end plates 31 are provided on the upper front portion and the rear portion of the side surface. The pair of front and rear cams 26 and 27 are formed with inclined surfaces 26a and 27a that are inclined with respect to the moving direction of the cleaning tank 20, and parallel surfaces 26b and 27b that are parallel to the moving direction.
The upper rear end of the cleaning tank 20 is formed with a pressing portion 20b that comes into contact with the protruding portion 30b of the inner lid 30 when the cleaning tank is moved rearward.

Each of the side end plates 31 includes a front roller 32 and a rear roller 33 at the lower part on the front side and the rear side, and further includes a middle roller 34 at the center. The front and rear rollers 32 and 33 are respectively engaged with front and rear cams 26 and 27 provided in the cleaning tank 20, and the middle roller 34 is inserted into a guide hole 45 formed in the cleaner main body 11. Inserted and guided up and down.
A front pin guide piece 37a and a rear pin guide piece 37b, and a front inner cover guide piece 39a and a rear inner cover guide piece 39b are formed on the front and rear upper end edges of the side end plate 31, respectively. Similarly, a front spring receiving piece 31a and a rear spring receiving piece 31b for receiving both ends of the spring 13 are formed in the lower part on the front side and the rear side. Further, the front and rear pin guide pieces 37a and 37b are formed with elongated holes 38a and 38b extending in the horizontal direction for guiding the pins 36a and 36b provided on the side surfaces of the inner lid 30.
The pair of front and rear cams 26 and 27 of the cleaning tank 20 and the front and rear rollers 32 and 33 of the pair of side end plates 31 move the side end plates 31 downward by moving the cleaning tank 20 rearward. The “push-down mechanism” is configured to move to

The inner lid 30 is provided with a pair of front pins 36 a and rear pins 36 b on the front side and rear side of the side end surfaces thereof, and the front and rear pins 36 a and 36 b are arranged on the front portion of the side end plate 31. In addition, the inner lid 30 is engaged with the elongated holes 38a and 38b formed in the rear pin guide pieces 37a and 37b so as to be horizontally movable in the front-rear direction. As a result, the inner lid 30 can move in the front-rear direction with respect to the side end plate 31, but moves together in the vertical direction. Further, a protrusion 30b is formed at the rear edge of the inner lid 30, and when the cleaning tank 20 moves rearward, the pressing portion 20b comes into contact with the protrusion 30b to clean the inner lid 30. Move backward together with tank 20.
Further, a pair of return springs 28 are attached between the inner lid 30 and the washing machine main body 11 to apply a forward biasing force to the inner lid 30. Thus, the front and rear pins 36a and 36b of the inner lid 30 are brought into contact with the front end portions of the long holes 38a and 38b.
The pressing portion 20 b of the cleaning tank 20 and the protruding portion 30 b of the inner lid 30 constitute a “push mechanism” that moves the inner lid 30 rearward by moving the cleaning tank 20 rearward.

A pair of springs 13 are attached to the cleaning machine main body 11 at the center portions on both upper sides thereof by respective support portions 14, and the front and rear ends of these springs 13 are the front and rear portions of the side end plate 31. The spring receiving pieces 31a and 31b are engaged. Accordingly, the pair of springs 13 hold the side end plate 31 in a predetermined position and apply an upward biasing force to the side end plate 31.
The washer body 11 is formed with a pair of guide holes 45 in the upper center part of both side walls thereof, and guides the middle roller 34 provided on the side end plate 31 in the vertical direction. Thereby, the side end plate 31 is allowed to move in the vertical direction, but is restricted from moving in the front-rear direction.
In this embodiment, the guide means of the middle roller 34 is configured as a guide hole 45. However, a guide member having a U-shaped cross section as used in the conventional example ("guide 15" in FIG. Reference).

[Operation of inner lid opening and closing mechanism]
Next, the operation of the inner lid opening / closing mechanism in this embodiment will be described with reference to FIG. FIG. 3 is a schematic diagram for explaining the operation of the opening / closing mechanism of the inner lid, and shows a rear portion of the opening / closing mechanism of the inner lid as a representative. Although the illustration of the front part is omitted, it operates in the same manner as the rear part.
When the washing tub 20 is drawn forward from the washing machine body 11, the pair of front and rear cams 26 and 27 of the washing tub 20 are paired in the same manner as the conventional dishwasher shown in FIG. It is in a position where it does not engage with the front and rear rollers 32, 33 of the side end plate 31. At this time, the side end plate 31 is urged upward by the spring 13 and is guided in the vertical direction by the middle roller 34 of the side end plate 31 and the guide hole 45 of the washing machine body 11. The plate 31 has been moved to the upper position.
Further, the inner lid 30 moves only in the front-rear direction on the side end plate 31 by engagement of the front and rear pins 36a and 36b with the long holes 38a and 38b of the front and rear pin guide pieces 37a and 37b. The inner lid 30 is moved to the front position on the side end plate 31 and is in the open position because it is urged forward by the return spring 28.

Next, when the cleaning tank 20 is pushed toward the storage position, as shown in FIG. 3A, the inclined surfaces 26a of the front and rear cams 26 and 27 provided in the cleaning tank 20 are provided. 27a approach the front and rear rollers 32, 33 provided on the side end plate 31, and the inclined surfaces 26a, 27a and the front and rear rollers 32, 33 engage with each other.
Further, when the cleaning tank 20 is pushed toward the storage position, as shown in FIGS. 3 (a) and 3 (b), the front and rear rollers 32, 33 have front and rear cams 26, A downward force is applied by the 27 inclined surfaces 26a and 27a. As a result, the side end plate 31 is guided by the middle roller 34 and the guide hole 45 and moved downward while resisting the urging force of the spring 13. At this time, the front and rear pins 36a, 36b of the inner lid 30 on the side end plate 31 are in contact with the front end portions of the long holes 38a, 38b by the biasing force of the return spring 28. Is moved downward together with the side end plate 31, but does not move backward.

As described above, when the cleaning tank 20 is pushed rearward and the inner lid 30 is moved downward, the packing 35 attached to the lower side surface of the inner lid 30 contacts the edge upper surface 20 a of the cleaning tank 20. To do. Since the packing 35 is in contact with the edge upper surface 20a of the cleaning tank and the pressing part 20b of the cleaning tank 20 is in contact with the protruding part 30b of the inner cover 30, the inner cover 30 is provided with the return spring 28. Against this biasing force, it moves backward together with the cleaning tank 20 (see FIG. 3B). At this time, the inner lid 30 is guided by the front and rear inner lid guide pieces 39a and 39b of the side end plate 31, and the front and rear pins 36a and 36b provided on the side end surfaces thereof are front and rear. Since it is guided by the long holes 38a and 38b of the pin guide pieces 37a and 37b, the inner lid 30 is moved backward together with the cleaning tank 20 on the side end plate 31.
In such an operation, the timing when the inner lid packing 35 contacts the upper surface 20a of the edge of the cleaning tank and the timing when the pressing section 20b of the cleaning tank contacts the protrusion 30b of the inner lid are the same. Is optimal, but if this is difficult, it is preferable to advance the timing when the pressing portion 20b of the cleaning tank contacts the protruding portion 30b of the inner lid. Thereby, after the packing 35 comes into contact with the edge upper surface 20a of the cleaning tank, the inner lid 30 and the cleaning tank 20 do not move relative to each other. It will not be dragged.

Subsequently, when the cleaning tank 20 is pushed toward the storage position, as shown in FIGS. 3B and 3C, the front and rear rollers 32 and 33 are moved to the front and rear cams 26 and 26, respectively. 27, the side end plates 31 are further moved downward against the urging force of the spring 13.
At this time, the inner lid 30 is pushed by the pressing portion 20b of the cleaning tank 20 and moved rearward together with the cleaning tank 20 while being moved downward together with the side end plate 31. Thus, since the inner lid 30 moves downward while moving downward, the packing 35 attached to the inner lid 30 can be dragged by the edge upper surface 20a of the washing vessel 20. There is no compression.
When the cleaning tank 20 reaches the accommodation completion position, as shown in FIG. 3C, the front and rear rollers 32 and 33 are parallel to the respective parallel surfaces 26b and 27b of the front and rear cams 26 and 27, respectively. Engage with. Then, the inner lid 30 is uniformly pressed against the cleaning tank 20, and the packing 35 attached to the inner lid 30 is compressed (collapsed) by a specified amount, and the upper open portion 21 of the cleaning tank 20 is sealed. can do.

As described above, when the cleaning tank 20 is pushed toward the housing position in the cleaning machine body 11, the inner lid 30 and the side end plate 31 are connected to the front and rear cams 26 and 27 of the cleaning tank 20 and the side. Due to the action of the push-down mechanism comprising the front and rear rollers 32, 33 of the end plate 31, a downward force is applied and moved downward.
In this way, when the inner lid 30 moves downward and the packing 35 attached to the inner lid 30 contacts the edge upper surface 20a of the cleaning tank 20, the pressing section 20b and the inner lid 30 of the cleaning tank 20 immediately before or immediately contact with each other. The inner lid 30 is moved rearward with respect to the side end plate 31 together with the cleaning tank 20 by the action of the pushing mechanism comprising the protruding portion 30b, so that the packing 35 is displaced in the front-rear direction. Therefore, non-uniform deformation such as twisting of the packing 35 can be completely prevented.
Accordingly, the packing 35 attached to the inner lid 30 is uniformly crushed on the edge upper surface 20a of the cleaning tank 20, so that a stable sealing property can be secured, and the occurrence of water leakage can be prevented. .

Next, the operation of the opening / closing mechanism of the inner lid when the cleaning tank 20 is pulled out from the storage position in the cleaning machine main body 11 will be described with reference to FIG. Since the operation when pulling out the cleaning tank 20 is completely opposite to the operation when pushing into the storage position described above, only the outline will be briefly described.
When the cleaning tank 20 is pulled out from the storage position (see FIG. 3C) and the front and rear cams 26, 27 of the cleaning tank 20 begin to move forward, the inner lid 30 returns to the return spring 28. Since the inner lid 30 and the side end plate 31 are biased upward by the spring 13, the inner lid 30 is moved forward together with the cleaning tank 20, and at the same time, The end plate 31 is also moved upward with respect to the cleaning tank 20.

Subsequently, when the cleaning tank 20 is pulled forward, the front and rear cams 26 and 27 are also moved forward, so that the inner lid 30 is moved further upward and forward. By the movement of the inner lid 30, the packing 35 is released from compression, and when the inner lid 30 is separated from the upper surface 20a of the edge of the cleaning tank 20 or immediately after the separation, the front and rear pins 36a and 36b of the inner lid 30 are moved to the front. And since it contacts the front ends of the long holes 38a, 38b of the rear pin guide pieces 37a, 37b, the forward movement of the inner lid 30 is stopped (see FIG. 3B).
Further, when the cleaning tank 20 is pulled forward, the inner lid 30 and the side end plate 31 are moved together together by the urging force of the spring 13 to open the upper opening 21 of the cleaning tank 20 ( (See FIG. 3 (a)).

[Cleaning tank storage position retention mechanism]
The holding means for holding the cleaning tank 20 in the storage position when the cleaning tank 20 is pushed into the storage position in the cleaning machine body 11 will be described with reference to FIG. FIG. 4 is a schematic diagram relating to the cleaning tank holding means in the inner lid opening / closing mechanism.
As shown in FIG. 4, the holding means for the washing tank 20 is provided in the washing tank 20 constituting a part of the push-down mechanism in the opening / closing mechanism of the inner lid of the dishwasher according to the above-described embodiment. It is configured by partially changing the shape of one or both of the front and rear cams 26 and 27. Here, the rear cam 47 in which the shape of the rear cam 27 is changed will be described as a representative, but it goes without saying that the front cam 46 can be similarly configured.
As clearly shown in FIG. 4B, the rear cam 47 (front cam 46) has a locking portion 47c (46c) composed of a concave portion and an inclined portion on its parallel surface 47b (46b). Is formed. With this configuration, when the cleaning tub 20 is pushed into the cleaning machine main body 11 to reach the storage position, the rear roller 33 (front roller 32) of the side end plate 31 is moved to the rear cam 47 (front cam 46). Therefore, the cleaning tank 20 can be stably held at the storage position. Thereby, the washing tank 20 pushed into the accommodation position is not carelessly pushed back in the forward pulling direction.

These are the typical explanatory drawings of the dishwasher by the Example of this invention, (a) is a longitudinal cross-sectional view of the state which accommodated the washing tank, (b) is the elements on larger scale of the opening / closing mechanism of an inner lid. . These are the schematic diagrams explaining the principal part of the dishwasher by the Example of this invention, (a) is the fragmentary top view of the state which removed the upper part of the washing machine main body, (b) is the opening-closing mechanism of an inner lid It is the elements on larger scale which cut | disconnected some and saw from the front side. These are the schematic diagrams explaining operation | movement of the opening / closing mechanism of the inner lid by the Example of this invention, (a) is the state immediately after the closing operation of the inner lid is started, (b) is in the closing operation of the inner lid. (C) shows a state in which the closing operation of the inner lid is finished. These are the schematic diagrams regarding the holding means of the washing tank in the opening / closing mechanism of the inner lid according to the embodiment of the present invention, (a) is a partial longitudinal sectional view of the state in which the washing tank is accommodated, (b) It is an enlarged view of the principal part. These are the schematic diagrams explaining the conventional tableware washing machine, (a) is a perspective view of the state which pulled out the washing tank, (b) is the longitudinal cross-sectional view of the state which similarly pulled out the washing tank. These are the schematic diagrams explaining the conventional tableware washing machine, (a) is the longitudinal cross-sectional view of the state which accommodated the washing tank, (b) is II sectional drawing of (a) (the left half has an inner lid) FIG. 2C is a sectional view taken along line II-II in FIG. These are the schematic diagrams explaining the closing operation | movement of the inner cover in the accommodation operation | movement of a washing tank in the conventional tableware washing machine, (a) is the state immediately before the closing operation of an inner cover is started, (b) is A state in which the inner lid is being closed, (c) shows a state in which the inner lid is closed. These are the figures explaining the relationship between the packing of the inner lid and the washing tub during the storage operation of the washing tub in the conventional dishwasher, and (a) to (d) are explanations regarding the process of the closing operation of the inner lid. FIG. 4E is an explanatory view of the dragging state of the packing during the closing operation of the inner lid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Dishwasher 11 ... Washing machine main body 13 ... Spring 14 ... (Spring) support part 20 ... Cleaning tank 20a ... (Washing tank) edge upper surface 20b ... (Washing tank) pressing part 21 ... Upper open part 22 ... Door 26 ... Front cam 27 ... Rear cam 26a, 27a ... (Cam) inclined surface 26b, 27b ... (Cam) parallel surface 28 ... Return spring 30 ... Inner lid 30b ... (Inner lid) protrusion 31 ... Side end plates 31a, 31b ... Spring receiving pieces 32 ... Front rollers 33 ... Rear rollers 34 ... Middle rollers 35 ... Packing 36a, 36b ... Pins 37a, 37b ... (on the side end plates) Pin guide pieces 38a , 38b ... long hole 39a, 39b ... inner lid guide piece 45 (side end plate) 45 ... guide hole 47 ... rear cam 47a ... inclined surface (of rear cam) 47b ... parallel surface (of rear cam) 47c ... locking portion

Claims (4)

The main body of the washing machine,
A cleaning tank that is movable in the front-rear direction with respect to the main body of the cleaning machine, and that includes an upper open portion,
An inner lid that is fitted with a packing and opens and closes the upper opening of the cleaning tank;
In the dishwasher comprising the inner lid opening and closing mechanism for opening and closing the inner lid,
A pair of side end plates that are supported by the inner lid opening and closing mechanism so as to be movable only in the vertical direction at the inner upper part of the washing machine body, and are biased upward;
The inner lid that is attached to the pair of side end plates so as to be movable only in the front-rear direction and is biased forward;
Along with the backward movement of the cleaning tank, a pressing mechanism for moving the pair of side end plates downward, and a pushing mechanism for moving the inner lid backward together with the cleaning tank are provided. ,
When the cleaning tank is moved from the pulled-out state to the rear receiving position, the pair of side end plates are moved downward by the push-down mechanism, and the inner lid is moved rearward by the push-in mechanism. A dishwasher characterized in that the upper open part of the washing tank is sealed with an inner lid.   A time when the pair of side end plates are moved downward by the push-down mechanism and the packing attached to the inner lid comes into contact with the cleaning tank; and a time when the inner lid starts to move backward by the push-in mechanism. The dishwasher according to claim 1, wherein the dishes are synchronized.   3. The push-down mechanism includes a pair of cams provided in the cleaning tank and having an inclined surface and a parallel surface, and rollers provided on the pair of side end plates. Dishwasher.   4. The dishwasher according to claim 3, wherein the washing tank is held in the storage position by forming a locking portion on a parallel surface of the cam in the push-down mechanism.

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