JP4836809B2 - Pull-out dishwasher - Google Patents

Description

  The present invention relates to a drawer-type dishwasher that performs steps such as washing, rinsing, and drying of tableware and cooking utensils (hereinafter referred to as tableware), and in particular, an inner lid that opens and closes an upper open portion of a washing tank. The present invention relates to an opening / closing mechanism.

In the built-in type drawer type dishwasher, the washing tub containing the dishes is pushed into the main body of the dishwasher and the upper open part of the washing tub is sealed with the inner lid, followed by washing and rinsing. Tableware is washed and dried by performing each process such as drying.
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 this link mechanism is configured such that the inner lid is supported by four links provided on the front, rear, left and right with respect to the main body of the dishwasher, and moves in the vertical direction while moving in the front-rear direction. And is biased upward by the spring member. Further, when the cleaning tank is pushed backward, the inner lid engages with the cleaning tank and moves rearward together.
With such a configuration, when no external force is applied to the inner lid as in the case where the washing tank is pulled forward from the main body, the inner lid is urged by the spring member so that it is lifted from the upper open portion of the cleaning tank. It is in a disengaged open position (up position). On the other hand, when the cleaning tank is pushed into the storage position at the rear of the main 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. Since the inner lid is lowered, the inner lid is pressed downward and rearward 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 dishwasher, the washing tank is simultaneously locked while pushing the washing tank. Otherwise, there is a problem that the cleaning tank cannot be moved to the accommodation position and the inner lid cannot 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 front surface of the main body 11 of the dishwasher 10 described in Patent Document 1 is open, and the cleaning tank 20 can be pulled out or pushed into the front opening 12. It is installed. 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 above the main 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 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 side surfaces in the left-right direction . 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 slide 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 side of the main body 11 of the dishwasher. 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 in the left-right direction , and a pair of front end plates 31, 31 are attached to the front end and the rear end, respectively. Part rollers (rollers) 32 and 32 and rear rollers (rollers) 33 and 33 are rotatably mounted at the center, and a pair of center rollers (medium rollers) 34 and 34 are rotatably mounted at the center. The pair of springs 13, 13 that are rod-like elastic bodies are supported by the support portions 14 that are formed at the inner side surfaces of the main body 11 at the center, and both ends of the pair of springs 13, 13 are arranged in the front-rear direction on the inner lid 30. It is inserted in each spring hole 30a, 30a formed as a long hole.

In addition, a pair of guides 15 and 15 having a U-shaped cross section for guiding the inner lid 30 in the vertical direction are fixed at the upper center of both inner side surfaces of the main body 11 of the dishwasher. 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 sliding 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.
Further, as shown in FIGS. 5 (b) and 6 (a), a pair of front cam members (guide blocks) 26 and a rear portion are provided on both outer portions of the front and rear ends of the cleaning tank 20. A cam member (guide block) 27 is provided. These cam members 26 and 27 are engaged with the pair of front and rear rollers 32 and 33 and are inclined with respect to the sliding direction of the cleaning tank 20 as shown in FIG. An inclined surface 27a and a parallel surface 27b parallel to the sliding direction are provided.
The inclined surface and the parallel surface of the front cam member 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 member 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 main body 11 of the dishwasher 10, the front and rear cam members 26 and 27 are engaged with the front and rear rollers 32 and 33 as shown in FIG. Therefore, 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 member 27 formed in the cleaning tank 20 is formed on the inner lid 30 as shown in FIG. When the rear roller 33 provided on the pair of 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 member 27 and the rear roller 33 will be described here, the same operation is performed for the front cam member 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 member 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 biasing force of the spring 13 applied to the parallel surface 27b via the rear roller 33 acts perpendicularly to the parallel surface 27b, so that the sliding direction (front-rear direction) 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 cam members 26 and 27, the front and rear rollers 32 and 33, and the roller 32 , 33 are directly determined by the side end plate 31 to which these are attached, and each of these members is relatively easy to ensure accuracy, so that the relative positional relationship between the inner lid 30 and the cleaning tank 20 in the closed position is stable. In addition, variations 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. By lowering by the action of the front and rear cam members 26, 27 provided in the cleaning tank 20, the packing 35 attached to the inner lid 30 is brought into pressure contact with the edge upper surface 20a of the cleaning tank 20, and the The upper open part 21 of the cleaning 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 main body 11 (see FIG. 5) toward the storage position, the inclined surface 27a of the rear cam member 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 member 27 comes into contact with the rear roller 33, the rear roller 33 is pressed by the inclined surface 27a when the cleaning tank 20 is moved further rearward. 30 is guided 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 cleaning tank 20 is further moved rearward from the state (2), the inner lid 30 is further lowered vertically by the action of the rear cam member 27 and the rear roller 33, and therefore the packing of the inner lid 30 is performed. 35 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 member 27, compresses the packing 35 by a predetermined crushing amount, and moves above the cleaning tank 20. The opening 21 is sealed. (Fig. 7 (c), Fig. 8 (d))

Thus, after the cleaning tank 20 is pushed toward the accommodation position in the main body 11, the packing 35 attached to the inner lid 30 is lowered vertically and comes into contact with the edge upper surface 20 a of the cleaning tank 20. Then, 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 problems, the present invention provides a seal against the longitudinal displacement of the inner lid when the washing tank is pushed into the main body and the upper open portion of the washing tank is sealed with the inner lid. It is to devise an opening / closing mechanism of the inner lid so that the performance does not become unstable.

In order to solve the above-described problems, a dishwasher according to the present invention includes an inner lid opening / closing mechanism that opens and closes an upper opening of a washing tank, a push-down mechanism that applies a downward force to the inner lid, and the inner lid. back and forth in those consisting of guide mechanism for guiding the movement of the movement in the vertical direction while restricting the, what basic to the guide means of the guide mechanism is inclined with respect to the sliding direction of the cleaning tank It is.

(1) A dishwasher according to the present invention (corresponding to claim 1) is slidable in the front-rear direction in a dishwasher main body having a front opening and a front opening of the main body, and has an upper opening. The cleaning tank is attached by being urged upward at the inner upper part of the main body, and has a packing attached to the lower surface, and an inner lid that opens and closes the upper open part of the cleaning tank, and before and after the cleaning tank. An opening / closing mechanism that opens and closes the inner lid by a sliding operation in a direction,
The opening / closing mechanism includes a push-down mechanism that applies a downward force to the inner lid by a sliding operation to the rear of the cleaning tank, and an open position of the inner lid while restricting the movement of the inner lid in the front-rear direction. And a guide mechanism that guides between the cam member and the closed position. The push-down mechanism includes a cam member provided on one of the cleaning tank and the inner lid, and a member provided on the other and engaged with the cam member. consists coupling member, the said cam member includes an inclined surface inclined with respect to the sliding direction of the cleaning tank, it is formed parallel to the parallel surfaces in the sliding direction continuously from the inclined part, the guide On the premise of a drawer type dishwasher in which the mechanism is between the side end of the inner lid and the inner surface of the main body and is constituted by guide means and guide rollers ,
At least the lower part of the guide means of the guide mechanism is formed to be inclined with respect to the sliding direction of the cleaning tank, and when the inner lid closes the upper open part of the cleaning tank, it moves backward while descending , When the packing is compressed and crushed on the edge upper surface of the washing tank, the amount of crushing in the vertical direction and the washing tank from when the packing contacts the upper surface of the edge of the washing tank until the washing tank is pushed in That is, the movement amount is configured to be equal .

By being configured in this manner, when the washing tub is accommodated in the front opening portion of the dishwasher main body, a downward force is applied to the inner lid by the push-down mechanism. The inner lid to which the downward force is applied in this way is guided by being inclined with respect to the sliding direction of the cleaning tank by the guide means of the guide mechanism, so that it moves backward while descending and moves upward in the cleaning tank. Close.
When the packing attached to the inner lid is compressed and crushed by the upper surface of the edge of the cleaning tank by the closing operation of the inner lid, the packing amount in the vertical direction (up / down stroke) of the packing comes into contact with the packing. Since the amount of movement of the cleaning tank (front / rear stroke) from when it is pushed to the end is equal, there is little displacement in the front / rear direction of the packing, and uneven deformation such as twisting does not occur, and the packing has a stable sealing performance. Can be secured.

(2) In the dishwasher, at least a lower part of the guide means of the guide mechanism may be formed in an arc shape. (Corresponding to claim 2)
According to such a configuration, the ratio between the compression amount of the packing and the rearward movement amount of the inner lid can be adjusted by making the shape of the guide means including the guide groove or the like an arc.

(3) In the dishwasher, when the upper portion of the guide means of the guide mechanism is formed in the vertical direction and the inner lid closes the upper open portion of the washing tank, the packing attached to the inner lid is The inner lid may be moved only downward until it comes into contact with the cleaning tank. (Corresponding to claim 3)
According to such a configuration, when the inner lid closes the upper open portion of the cleaning tank, the inner lid is moved backward until the packing attached to the inner lid contacts the upper surface of the edge of the cleaning tank. Never happen. After the packing comes into contact with the upper surface of the edge of the washing tank, the inner lid is moved rearward when it is compressed and crushed by the inner lid.

In the dishwasher of the present invention, when the washing tub is accommodated in the dishwasher main body and the inner lid closes the upper open part of the washing tub, the inner lid moves backward while being lowered with respect to the washing tub. (Slightly descending), the amount of crushing in the vertical direction (up / down stroke) of the packing becomes equal to the amount of movement of the cleaning tank (front / back stroke) from when the packing comes into contact until the pushing is completed. The packing in the packing is less displaced in the front-rear direction, and uneven deformation such as twisting of the packing can be prevented. As a result, it is possible to ensure a stable sealing property of the packing and prevent water leakage.
In addition, since the packing can be protected to prevent damage, the durability of the packing can be increased.

  Below, the dishwasher by Example 1 and Example 2 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 the other configurations are the same as those of the conventional dishwasher. The description will focus on the lid opening / closing mechanism, and the description of the other common components will be omitted. Moreover, in description of each Example, the part which is common in the conventional dishwasher shown in FIGS. 5-8 is demonstrated using the same code | symbol.

  First, the dishwasher by Example 1 of this invention is demonstrated, referring FIG.1 and FIG.2. FIG. 1 is a cross-sectional view schematically illustrating the opening / closing operation of the inner lid in the dishwasher, where (a) is an intermediate state when the inner lid is in an open state, and (b) is an intermediate state in which the inner lid is moved from an open state to a closed state. In the case of the state, (c) shows the case where the inner lid is closed. Moreover, (d) is a DD cross-sectional view of (c). FIG. 2 is a schematic partial enlarged view of a guide mechanism for guiding the inner lid.

[Configuration of inner lid opening and closing mechanism]
The washing tank 20 is substantially the same as that of a conventional dishwasher, and is supported by rails so that it can be pulled out or pushed in the front-rear direction with respect to the main body 11 of the dishwasher. A pair of front cam members 26 and a rear cam member 27 that apply a downward force to the inner lid 30 are provided on both outer portions. The pair of front and rear cam members 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 inclined surfaces. .
A pair of front guide grooves 6 and a rear guide groove 7 serving as guide means for restricting movement of the inner lid 30 in the front-rear direction are provided on the front and rear side walls on both sides in the upper left and right direction of the main body 11. These guide grooves 6 and 7 are inclined so that the inner lid 30 is moved backward while descending. A pair of springs 13 for applying an upward biasing force to the inner lid 30 are supported by the respective support portions 14 at the center portions on both sides in the upper left and right direction of the main body 11.

A substantially flat inner lid 30 that is urged upward by the pair of springs 13 is disposed on the inner upper side of the main body 11 of the dishwasher, and the lower surface of the inner lid 30 (the washing tank 20 side). The packing 35 that is pressed against the edge upper surface 20a of the cleaning tank 20 is mounted on the outer peripheral portion of the surface. In addition, a pair of flat side end plates 31 are vertically attached to both side ends of the inner lid 30 in the left-right direction, and the front and rear ends of the side end plates 31 are connected to the pair of front portions. A front roller 32 and a rear roller 33, which are a pair of engaging members that engage with the cam member 26 and the rear cam member 27, are rotatably provided.
The pair of front and rear cam members 26, 27 and the pair of front and rear rollers (engagement members) 32, 33 constitute a “pressing mechanism” that applies a downward force to the inner lid 30.

Further, near the center of the pair of side end plates 31, a pair of front guide rollers 36 and a rear guide roller 37 that engage with the pair of front and rear guide grooves 6 and 7 of the main body 11 are rotatable. The end portions of the pair of springs 13 are in contact with the support shafts of the pair of front and rear guide rollers 36 and 37 to urge the inner lid 30 upward. As a mechanism for urging the inner lid 30 upward, each end portion of the pair of springs 13 can be inserted into a spring hole formed in the inner lid 30 as in the conventional one. .
A pair of front and rear guide grooves (guide means) 6 and 7 formed in the main body 11 and a pair of side end plates 31 respectively engaged with the front and rear guide grooves 6 and 7. The front and rear guide rollers 36 and 37 constitute a “guide mechanism” for guiding the inner lid 30 between the open position and the closed position.
Note that the convex portion 28 at the upper rear portion of the cleaning tank 20 and the concave portion 38 at the lower rear surface of the inner lid 30 allow the inner lid 30 to be moved away from the cleaning tank 20 when the inner lid 30 closes the upper open portion 21 of the cleaning tank 20. For positioning in the left-right direction.

[Operation of inner lid opening and closing mechanism]
The operation of the inner lid opening / closing mechanism according to the first embodiment will be described with reference to FIGS.
When the washing tub 20 is drawn forward from the main body 11 of the dishwasher, the front and rear cam members 26 and 27 do not engage with the front and rear rollers 32 and 33 as in the conventional dishwasher. Therefore, the inner lid 30 is urged upward by the spring 13 and is guided upward and forward by a guide mechanism including the front and rear guide grooves 6 and 7 and the front and rear guide rollers 36 and 37. The inner lid 30 is moved to an open position in front of the upper side.
Next, when the cleaning tank 20 is pushed toward the storage position, the inclined surfaces of the front and rear cam members 26 and 27 formed in the cleaning tank 20 as shown in FIG. 26a and 27a approach the front and rear rollers 32 and 33 provided on the pair of side end plates 31 of the inner lid 30, and the inclined surfaces 26a and 27a and the front and rear rollers 32 and 33 are engaged. Match.

Further, when the cleaning tank 20 is pushed toward the storage position, each of the front and rear cam members 26 and 27 is placed on the front and rear rollers 32 and 33 as shown in FIG. A downward force is applied by the inclined surfaces 26a and 27a. As a result, the inner lid 30 is guided by the guide mechanism comprising the front and rear guide grooves 6 and 7 and the front and rear guide rollers 36 and 37 while resisting the upward biasing force of the pair of springs 13. While moving backward, the upper open portion 21 of the cleaning tank 20 is closed.
When the cleaning tank 20 is further pushed in and reaches the accommodation completion position, the front and rear rollers 32 and 33 are moved to the front and rear cam members 26 and 27, respectively, as shown in FIG. Engage with the parallel surfaces 26b, 27b. Then, the inner lid 30 is uniformly pressed against the upper surface 20a of the edge of 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 of the cleaning tank 20 is compressed. 21 is sealed.

Thus, when the cleaning tank 20 is pushed into the storage position in the main body 11, the inner lid 30 faces downward by the action of the push-down mechanism comprising the front and rear cam members 26 and 27 and the front and rear rollers 32 and 33. Is applied to the front and rear guide grooves 6 and 7 and the front and rear guide rollers 36 and 37 to move backward while moving downward, so that the packing in the vertical direction Since the amount of crushing (up / down stroke) and the amount of movement of the cleaning tank (front / rear stroke) from when the packing comes into contact until the pushing is completed are equal, the packing 35 attached to the inner lid 30 is moved in the front / rear direction. Misalignment is reduced, and uneven deformation such as twisting of the packing can be 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. .

[Specific Example of Example 1]
Here, a specific example of the guide mechanism in the first embodiment will be described with reference to FIG. FIG. 2A is a partially enlarged view of the guide mechanism including the guide groove 6 (7) and the guide roller 36 (37).
2A, the “A” position of the guide roller 36 (37) is the upper front end position of the guide groove 6 (7), the inner lid 30 is in the open position, and the packing 35 is above the cleaning tank 20. If you are away. The “B” position of the guide roller 36 (37) is a substantially intermediate position of the guide groove 6 (7), and is a case where the inner lid 30 is lowered and the packing 35 contacts the edge upper surface 20a of the cleaning tank. The “C” position of the guide roller 36 (37) is the lower rear end position of the guide groove 6 (7). The inner lid 30 seals the upper opening 21 of the cleaning tank, and the packing 35 is a predetermined amount. This is the case when it is crushed.

The inclination angle θ of the guide groove 6 (7) is determined by the compression amount (crushing allowance) H2 of the packing 35 and the movement amount L2 of the inner lid 30 when the packing 35 is compressed. The optimum inclination angle θ is θ = 45 ° at which the compression amount H2 and the movement amount L2 are equal. However, the inclination angle is not limited to this inclination angle, and when the inner lid 30 seals the cleaning tank 20, the packing 35 If there is little misalignment in the front-rear direction and non-uniform deformation such as twisting does not occur in the packing 35, the inclination angle θ can be appropriately selected. H1 and L1 are the movement amounts in the vertical direction and the front-rear direction until the packing 35 contacts the cleaning tank 20, and H and L are the total movement amounts in the vertical direction and the front-rear direction.
If the specified crushing allowance H2 of the packing 35 is 3 mm, the movement amount L2 of the inner lid 30 is 3 mm when the inclination angle θ is 45 °, and the movement amount L2 of the inner lid 30 when the inclination angle θ is 31 °. Is 5 mm.
Further, the guide groove 6 (7) is a linear inclined groove as shown in FIG. 2 (a), and as shown in FIG. The groove up to the position can be a straight groove extending in the vertical direction without tilting.

Next, a dishwasher according to Embodiment 2 of the present invention will be described with reference to FIGS. 3A and 3B are cross-sectional views schematically illustrating the opening / closing operation of the inner lid in the dishwasher, where FIG. 3A is an intermediate state in which the inner lid is moved from the open state to the closed state when the inner lid is in the opened state. In the case of the state, (c) shows the case where the inner lid is closed. FIG. 4 is a schematic partial enlarged view of a guide mechanism for guiding the inner lid.
The dishwasher according to the second embodiment is the same as the dishwasher according to the first embodiment except that the shapes of the pair of front guide grooves 8 and the rear guide grooves 9 which are guide means formed in the main body 11 are different. Since the other configuration is the same as that of the first embodiment, the second embodiment is provided in the pair of front and rear guide grooves 8 and 9 and the pair of side end plates 31 of the inner lid 30. The description will be omitted with respect to the configuration common to the first embodiment except that the “guide mechanism” including the paired front and rear guide rollers 36 and 37 will be mainly described.

[Configuration of guide mechanism]
The pair of front guide grooves 8 and rear guide grooves 9 formed in the main body 11 of the dishwasher are not linear inclined grooves as in the first embodiment, but linear grooves 8a and 9a extending in the vertical direction. And arc grooves 8b and 9b which are inclined downward and rearward. A pair of front and rear guide rollers 36 and 37 rotatably provided on the pair of side end plates 31 of the inner lid 30 are engaged with the pair of front and rear guide grooves 8 and 9, respectively. Yes.

[Operation of guide mechanism]
When the washing tub 20 is pulled forward from the main body 11 of the dishwasher, the front and rear cam members 26, 27 do not engage with the front and rear rollers 32, 33, so that the inner lid 30 is attached to the spring 13. The inner lid 30 is urged upward by the urging force and is guided forward by the guide mechanism comprising the front and rear guide grooves 8 and 9 and the front and rear guide rollers 36 and 37. Move to the forward open position.
When the cleaning tank 20 is pushed toward the storage position, as shown in FIG. 3A, the inclined surfaces 26a, 27a of the front and rear cam members 26, 27 formed in the cleaning tank 20 are formed. However, the front and rear rollers 32, 33 provided on the pair of side end plates 31 of the inner lid 30 approach each other, and the inclined surfaces 26a, 27a and the front and rear rollers 32, 33 engage with each other. .

When the cleaning tank 20 is further pushed toward the storage position, the front and rear rollers 32 and 33 are inclined to the front and rear cam members 26 and 27 as shown in FIG. A downward force is applied by 26a and 27a. Thus, the inner lid 30 is guided by the guide mechanism including the front and rear guide grooves 8 and 9 and the front and rear guide rollers 36 and 37 while resisting the upward biasing force of the pair of springs 13. By the guide mechanism, the inner lid 30 is lowered by the straight grooves 8a and 9a extending in the vertical direction in the first half, and moved downward by the arc grooves 8b and 9b in the second half. An operation of closing the upper opening 21 is performed.
When the cleaning tank 20 is further pushed in and reaches the accommodation completion position, the front and rear rollers 32 and 33 are moved to the front and rear cam members 26 and 27, respectively, as shown in FIG. Engage with the parallel surfaces 26b, 27b. Then, the inner lid 30 is uniformly pressed against the edge upper surface 20 a of the cleaning tank 20, and the packing 35 attached to the inner lid 30 is crushed by a specified amount to seal the upper open portion 21 of the cleaning tank 20.

  As described above, according to the guide mechanism according to the second embodiment, the downward force is applied to the inner lid 30 by the push-down mechanism including the front and rear cam members 26 and 27 and the front and rear rollers 32 and 33. In the first half, that is, before the packing 35 of the inner lid 30 contacts the cleaning tank 20, the inner lid 30 is lowered vertically along the straight grooves 8a and 9a. Subsequently, in the latter half of the case where a downward force is applied to the inner lid 30, that is, after the packing 35 of the inner lid 30 comes into contact with the edge upper surface 20a of the cleaning tank 20, the inner lid 30 is moved to the arc grooves 8b, Since it is moved backward (inclined downward) while being lowered along 9b, the displacement in the front-rear direction of the packing 35 attached to the inner lid 30 is reduced, and uneven deformation of the packing 35 can be prevented. Therefore, it is possible to secure a stable sealing property and prevent water leakage.

[Specific Example of Example 2]
Here, a specific example of the second embodiment will be described with reference to FIG. FIG. 4 is an enlarged view of the guide mechanism comprising the guide groove 8 (9) and the guide roller 36 (37).
In FIG. 4, the “A” position of the guide roller 36 (37) is the upper end position of the linear groove 8a (9a) extending in the vertical direction of the guide groove 8 (9), and the inner lid 30 is in the open position and packing is performed. This is a case where 35 is away from the cleaning tank 20. The “B” position of the guide roller 36 (37) is a position where the linear groove 8a (9a) extending in the vertical direction moves to the circular arc groove 8b (9b) extending obliquely. Is in contact with the edge upper surface 20a of the cleaning tank. Further, the “C” position of the guide roller 36 (37) is the lower rear end position of the arc groove 8b (9b), and the inner lid 30 seals the upper open portion 21 of the cleaning tank so that the packing 35 has a predetermined amount. This is the case when only crushed.

The shape of the arc groove 8b (9b) is determined by the compression amount (crushing allowance) H2 of the packing 35 and the movement amount L2 (L) of the inner lid 30 when the packing 35 is compressed. For example, if the crushing allowance of the packing 35 is 3 mm, the total moving distance (inner lid lowering stroke) H from the “A” position to the “C” position of the guide roller 36 (37) H is 9 mm. ”Position from the“ C ”position to the“ C ”position, the total travel distance (stroke to the rear of the inner lid) L (L2) is 5 mm, and the guide roller 36 (37) is moved up and down from the“ A ”position to the“ B ”position. The moving distance in the direction (stroke until the inner lid packing contacts) H1 is 6 mm, and the radius R of the arc groove 8b (9b) from the “B” position to the “C” position is 14.8 mm. In addition, the radius R of the arc groove can be a predetermined range passing through the “B” and “C” positions, for example, R = 15 to 20 mm.
In addition to the shape shown in FIG. 4, the guide groove 8 (9) can be formed in an arc shape as a whole, or a plurality of linear grooves can be formed continuously.

These are the longitudinal cross-sectional views explaining typically the opening / closing operation | movement of the inner lid in the dishwasher of Example 1 of this invention, (a) is an inner lid open state, (b) is an inner lid opened. In the intermediate state from the closed state to the closed state, (c) shows the case where the inner lid is in the closed state, and (d) is a sectional view taken along the line DD in (c). These are the typical fragmentary enlarged views of the guide mechanism of the inner lid in the dishwasher of Example 1, (a) And (b) shows the guide groove of a different shape. These are the longitudinal cross-sectional views explaining typically the opening / closing operation | movement of the inner lid in the dishwasher of Example 2 of this invention, (a) is an open state of an inner lid, (b) is an inner lid opened. In the intermediate state from the state to the closed state, (c) shows the case where the inner lid is in the closed state. These are the typical partial enlarged views of the guide mechanism of the inner cover in the dishwasher of Example 2. FIG. 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

6,8 ... Front guide groove (guide means) 7,9 ... Rear guide groove (guide means)
DESCRIPTION OF SYMBOLS 10 ... Dishwasher 11 ... (Dishwasher) main body 12 ... Front opening part 13 ... Spring 14 ... (Spring) support part 16 ... Main body side rail 17 ... Roller 18 ... Rotating shaft 19 ... Support 20 ... Washing tank 20a ... Upper surface of edge portion 21 (upper side of cleaning tub) 21 ... Upper open portion 22 ... Door 25 ... Rail of cleaning tub side 26 ... Front cam member 27 ... Rear cam member 26a, 27a ... Inclined surface 26b, 27b ... Parallel surface 30 ... Inner lid 31 ... Side end plate 32 ... Front roller 33 ... Rear roller 35 ... Packing 36 ... Front guide roller 37 ... Rear guide roller

Claims (3)

A dishwasher body having a front opening;
A washing tank that is slidable in the front-rear direction at the front opening portion of the main body, and has an upper opening portion;
At the inner upper part of the main body is attached by being biased upward, and a packing is attached to the lower surface, and an inner lid that opens and closes the upper open part of the cleaning tank,
An opening / closing mechanism that opens and closes the inner lid by a sliding operation in the front-rear direction of the cleaning tank,
The opening / closing mechanism includes a push-down mechanism that applies a downward force to the inner lid by a sliding operation to the rear of the cleaning tank, and an open position of the inner lid while restricting the movement of the inner lid in the front-rear direction. And a guide mechanism for guiding between the closed position and the closed position,
The push-down mechanism is composed of a cam member provided on one of the cleaning tank or the inner lid, and an engaging member provided on the other and engaged with the cam member,
The aforementioned cam member, an inclined surface inclined with respect to the sliding direction of the cleaning tank, are formed parallel to the parallel surfaces in the sliding direction continuously in the inclined surface,
In the drawer type dishwasher in which the guide mechanism is located between the side end of the inner lid and the inner side surface of the main body and is constituted by guide means and guide rollers ,
At least the lower part of the guide means of the guide mechanism is formed to be inclined with respect to the sliding direction of the cleaning tank, and when the inner lid closes the upper open part of the cleaning tank, it moves backward while descending , When the packing is compressed and crushed on the edge upper surface of the washing tank, the amount of crushing in the vertical direction and the washing tank from when the packing contacts the upper surface of the edge of the washing tank until the washing tank is pushed in A pull-out type dishwasher characterized in that the amount of movement is equal .   2. The drawer type dishwasher according to claim 1, wherein at least a lower part of the guide means of the guide mechanism is formed in an arc shape.   The upper portion of the guide means of the guide mechanism is formed in the vertical direction, and when the inner lid closes the upper open portion of the cleaning tank, the inner lid is in contact until the packing attached to the inner lid contacts the cleaning tank. The drawer-type dishwasher according to claim 1 or 2, characterized in that moves only downward.

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