JP2008194209A - Drawer type dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To directly open/close an inner lid by frontward or rearward movement of a washing tub without using an elastic body such as a spring for constantly frontward energizing the inner lid by devising an opening/closing mechanism of an inner lid. <P>SOLUTION: This drawer type dishwasher consists of an inner lid moving mechanism for moving the inner lid with a front/rear-directional slide movement of a washing tub, and an inner lid guide mechanism obliquely vertically guiding the movement of the inner lid by the inner lid moving mechanism. The inner lid guide mechanism is composed of a pair of left/right guide grooves 11 and 12 obliquely vertically formed in a dishwasher body, and a pair of left/right guide rollers 18 and 19 provided in the inner lid 30 and guided by the guide groove, and the inner lid moving mechanism is composed of a cam 2 turnably pivoted at the dishwasher body, turned by the slide movement of the washing tub 21 and moving the guide rollers of the inner lid by the turning operation, and an inverting spring 8 inverting an energizing force and applying the force to the turning cam. <P>COPYRIGHT: (C)2008,JPO&INPIT

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 tank containing the dishes is pushed into the washing machine main body and the upper open part of the washing tank is sealed with the inner lid, followed by washing, rinsing and drying. Tableware is washed and dried by performing each process. As the opening / closing mechanism of the inner lid in the dishwasher, a mechanism using a guide mechanism or a link mechanism provided between the washing machine main body and the inner lid is well known.
A device using a guide mechanism as the opening / closing mechanism of the inner lid is described in, for example, Japanese Patent Application Laid-Open No. 2002-17642 (“Drawer-type dishwasher”, Patent Document 1), and a device using a link mechanism. For example, it is described in JP2002-143072 ("Dishwasher", Patent Document 2) and JP2003-518 ("Dishwasher", Patent Document 3).

[Conventional dishwasher]
A conventional drawer-type dishwasher described in Patent Document 1 will be described with reference to FIGS. FIG. 4 is a longitudinal sectional view of the dishwasher with the washing tub accommodated in the washing machine body, FIG. 5 is a longitudinal sectional view of the washing tub drawn out of the washing machine body, and FIG. FIG. 6B is a perspective view of the holding mechanism and the lock mechanism of the dishwasher.
4 and 5, the left side of the figure is “front” and the right side is “rear”.
As shown in FIGS. 4 and 5, the conventional dishwasher is slidable forward or backward with respect to the box-shaped washer main body 20 having an open front and the washer main body 20. The drawer-type cleaning tank 21 is opened at the top, and the inner lid (seal lid) 30 is disposed on the upper portion of the cleaning machine body 20 and opens and closes the upper opening of the cleaning tank 21. .

Rails 39 are fixed inside both sides of the washing machine body 20, and rollers 38 are provided outside both sides of the washing tank 21, and the rollers 38 are guided by the rails 39, thereby The tank 21 can slide smoothly in the horizontal direction and in the front-rear direction. A front door 22 having a handle 22a is provided in front of the cleaning tank 21.
The washing tank 21 includes a washing nozzle 25, a pump 28 for sending pressurized washing water to the washing nozzle 25, and a tableware storage bowl 23 for storing dishes, and the operation of the pump 28 is started. Then, while the washing nozzle 25 rotates, the washing water is spouted upward, and the dishes in the tableware storage bowl 23 are washed.

As shown in FIGS. 4 to 6A, the inner lid 30 disposed on the upper part of the cleaning machine body 20 includes a pair of flanges 31 extending in the front-rear direction on both the left and right sides thereof, and the lower surface thereof. Further, a packing (seal member) 33 for sealing the cleaning tank 21 is provided, and a guide groove (slide hole) 32 extending obliquely is formed in the vicinity of the ends in the front-rear direction of the pair of flanges 31. . A pair of guide rods 29 are fixed to the main body 20 of the washing machine, and tip portions 29a, 29a of the guide rods 29 extend in the left-right direction (perpendicular to the plane of FIG. 4). Are inserted into the guide grooves 32, 32.
A spring 35 for urging the inner lid 30 forward and upward is attached between the cleaning machine main body 20 and the inner lid 30. When no external force acts on the inner lid 30, the guide rod The front end portions 29a and 29a are at the rear lower end position of the guide grooves 32 and 32, and the inner lid 30 is in the open position at the upper front side (see FIG. 5).

As shown in FIGS. 4 and 5, a reinforcing plate 41 is mounted in the horizontal direction on the outer upper portions of the right and left sides of the cleaning tank 21. The reinforcing plate 41 extends rearward from the water tank portion of the cleaning tank 21, and a fixing pin 41 b is fixed inside the reinforcing plate 41.
As shown in FIG. 4, when the cleaning tank 21 is pushed forward toward the rear receiving position, the end 41 a of the reinforcing plate 41 contacts the flange 34 of the inner lid 30. Touch. Further, when the cleaning tank 21 is pushed in, the inner lid 30 is moved backward together with the cleaning tank 21 against the biasing force of the spring 35. Then, since the obliquely extending guide grooves 32 and 32 formed in the flange 31 of the inner lid 30 are engaged with the distal end portions 29a and 29a of the guide rod 29, the inner lid 30 is moved downward due to its rearward movement. Pushed down to the side.
Further, when the cleaning tank 21 is pushed into the storage position (see FIG. 4), the leading end portions 29a and 29a of the guide rod 29 are positioned at the front upper ends of the guide grooves 32 and 32 and attached to the inner lid 30. The packing 33 is pressed against the upper edge surface of the cleaning tank 21. As a result, the upper open portion of the cleaning tank 21 is sealed by the inner lid 30.

As shown in FIGS. 4, 5, and 6 (b), the movable cam 43 has a notch 43 a formed at the tip, and is provided in the washing machine body 20 so as to be swingable around the pin 42. And serves to hold the cleaning tank 21 in the storage position. A spring 45 is attached between the movable cam 43 and the washing machine main body 20, and this spring 45 counteracts the movable cam 43 at a position (a position of the spring 45a) indicated by a one-dot chain line in FIG. It is urged clockwise, and urged clockwise at the position indicated by the solid line (position of spring 45b).
At the position indicated by the alternate long and short dash line, the movable cam 43 is in contact with the stopper 53 and receives the fixed pin 41b of the cleaning tank 21 pushed into the housing position into the cutout portion 43a. When the cleaning tank 21 is further pushed rearward, the spring 45 is rotated clockwise while being stretched, and the direction of rotation of the force applied by the spring 45 to the movable cam 43 is switched during the rotation. That is, in the middle of rotation, what was biased counterclockwise until then is biased clockwise after that. As a result, the movable cam 43 is stabilized at the position indicated by the solid line in FIG.
The movable cam 43, the fixing pin 41b of the cleaning tank 21, and the spring 45 that urges the movable cam 43 clockwise or counterclockwise constitute a holding mechanism for the cleaning tank 21.

For this purpose, the movable cam 43 has a position where the cleaning tank 21 is accommodated (a position indicated by a solid line in FIG. 6B), or a position where the cleaning tank 21 is pulled out (a position indicated by a one-dot chain line in FIG. 6B). The cleaning tank 21 is operated in such a manner that the cleaning tank 21 does not stay stably at these intermediate positions while being held at any one of the positions where it can be immediately recognized that the cleaning tank is not in the storage position.
During normal use, when the user pushes the cleaning tank 21 with normal force, the spring 45 is extended and the movable cam 43 is placed in the storage position. Reference numeral 45b indicates the spring 45 when the cleaning tank 21 is accommodated in the accommodation position. In this state, the spring 45b urges the fixing pin 41b of the reinforcing plate 41 in the clockwise direction to hold the cleaning tank 21 in the storage position.
When the user pulls out the cleaning tank 21 held in this storage position, the spring 45b is rotated counterclockwise while being stretched, and the cleaning tank 21 is pulled out. When the washing tank 21 is pulled out in this way, the spring 45 moves to the position indicated by reference numeral 45a, and stabilizes the movable cam 43 at the position of the one-dot chain line.

  The detection mechanism that detects whether or not the cleaning tank 21 is in the storage position is configured by a movable cam position detection switch 50 that detects the position of the movable cam 43 and a swing plate 55 that swings around the pin 55a. Yes. If the movable cam 43 is at the position indicated by the solid line in FIG. 6B, the plunger 50a is pushed in by the swing plate 55, and the movable cam position detection switch 50 is turned on. On the other hand, if the movable cam 43 is at the position indicated by the one-dot chain line in FIG. 6B, the swing plate 55 does not push the plunger 50a, so the movable cam position detection switch 50 is turned off. Thereby, it is possible to detect whether or not the cleaning tank 21 is in the storage position.

The lock mechanism for locking the cleaning tank 21 in the storage position includes an arm 48 that is swingably supported by the cleaning machine body 20 by a pin 49, a shaft 47a that is connected to the arm 48 by a pin 47c, and the shaft 47a. And a solenoid 47 for drawing the shaft 47a.
When the solenoid 47 is energized and the shaft 47a is retracted, the arm 48 is swung in the clockwise direction to be in a lock position that restricts the rotation of the movable cam 43 (see FIGS. 4 and 6B). In this locked position, the cleaning tank 21 is locked in the storage position. On the other hand, if the solenoid 47 is not energized, the shaft 47a is extended by the spring 47b, the arm 48 is swung counterclockwise, and the movable cam 43 is unlocked (see FIG. 5).
Reference numeral 51 denotes a lock position detection switch for detecting whether or not the arm 48 of the lock mechanism is in the lock position.

Next, the operation of the conventional dishwasher will be described with reference to FIGS. 4 to 6 (b).
In the state where the cleaning tank 21 is pulled forward, the movable cam 43 is urged counterclockwise by the spring 45 (45a) and is in contact with the stopper 53 as shown in FIG. When the cleaning tank 21 in such a state is pushed toward the accommodation direction, the fixed pin 41 b provided on the reinforcing plate 41 of the cleaning tank 21 is fitted into the notch 43 a of the movable cam 43. When the cleaning tank 21 is pushed further in the accommodation direction, the movable cam 43 is rotated clockwise while extending the spring 45, reaches the accommodation position shown in FIG. Sealed by the inner lid 30. At this time, the movable cam position detection switch 50 is turned on.
In this state, since the solenoid 47 is in a non-energized state, the lock position detection switch 51 is off.

After the power switch (not shown) of the dishwasher is turned on in this state, the operation of the dishwasher is started by turning on the operation start switch (not shown). Can be turned on under the condition that the movable cam position detection switch 50 is turned on, and the solenoid 47 is energized under the condition that this operation start switch is turned on. When the solenoid 47 is energized, the arm 48 is rotated from the unlocked position shown in FIG. 5 to the locked position shown in FIG. When the arm 48 is thus rotated to the lock position, the lock position detection switch 51 is turned on as shown in FIG. 4, and the washing operation of the dishwasher is started on this condition.
When the predetermined cleaning operation is completed, the power switch is automatically turned off and at the same time, the solenoid 47 is turned off, and the arm 48 is rotated to the unlock position shown in FIG. Is unlocked. Also, when the temporary stop switch is pushed during the cleaning operation, the solenoid 47 is similarly de-energized and the movable cam 43 is unlocked.

Moreover, the tableware washing machine described in the said patent document 2 and the patent document 3 utilizes a link mechanism as an opening / closing mechanism of an inner lid, and external force is acting on the inner lid provided in the upper part of the washing machine main body. If not, the inner lid is in the upper front open position by the biasing force of the spring, and when the cleaning tank is pushed in the accommodating direction, the inner lid is rearward with the cleaning tank against the biasing force of the spring. By being moved to, the link mechanism pushes it downward and rearward, and seals the upper open portion of the cleaning tank.
JP 2002-17642 A JP 2002-143072 A JP 2003-518 A

The opening / closing mechanism of the inner lid of the dishwasher described in Patent Document 1 includes a reinforcing plate end 41a of the washing tank 21, a flange 34 of the inner lid 30, and a spring 35 that constantly biases the inner lid 30 forward. And an inner lid guide mechanism comprising guide grooves 32 and 32 formed in the flange 31 of the inner lid 30 and tip portions 29a and 29a of guide rods provided in the main body of the washing machine. As the cleaning tank 21 is pushed in or pulled out, the inner lid moving mechanism applies a backward or forward force to the inner lid 30 in the horizontal direction, and the force applied to the inner lid 30 is applied. The opening / closing operation of the inner lid 30 is performed by converting the movement into an obliquely downward or upward movement by the action of the inner lid guide mechanism.
Thus, in the opening / closing mechanism of the inner lid of Patent Document 1, the force applied backward in the horizontal direction with respect to the rear end portion of the inner lid 30 against the urging force forward by the spring 35, Since the inner lid 30 is closed by converting the movement downward, the force applied to the inner lid 30 is indirect, and pressure is uniformly applied to the packing 33 attached to the inner lid 30. This has caused a problem that the sealing property of the inner lid 30 becomes unstable.

The dishwashers described in the above cited references 2 and 3 are also the same as those in the above-mentioned Patent Document 1, the method of applying force to the inner lid is indirect, and the packing attached to the inner lid is uniform. The inner lid could not be compressed and the sealing performance of the inner lid was unstable.
Further, in the dishwashers of the above cited references 2 and 3, the inner lid is always urged forward by an elastic body such as a spring, and the cleaning tank is pushed in even after the cleaning tank is moved to the storage position. Since the lock operation had to be performed, the inner lid could not be easily sealed. Further, since the inner lid is moved downward and rearward by a link mechanism comprising four links, front, rear, left and right, depending on the dimensional accuracy and assembly accuracy of each link, the pressure applied to the packing of the inner lid can be made uniform. The sealing of the inner lid was unstable.

  Therefore, in order to solve the above-described problems, the present invention always opens the inner lid when the upper opening portion of the cleaning tank is opened and closed by the inner lid as the cleaning tank moves forward or backward. The inner lid opening and closing mechanism is devised so that the inner lid can be opened and closed directly by moving the cleaning tank forward or backward without using an elastic body such as a spring biased forward. It is to be.

  The dishwasher of the present invention rotates the rotating cam in accordance with the sliding operation in the front-rear direction of the cleaning tank, and moves the inner lid directly by the rotating operation of the rotating cam. Basically, the opening and closing operation is performed.

(1) A dishwasher according to the present invention (corresponding to claim 1) includes a washing machine body having a front opening,
A cleaning tank that is slidable in the front-rear direction at the front opening part of the washing machine body, and has an upper opening part,
An inner lid that is provided on the inner upper part of the washing machine main body, has a packing attached to the lower surface, and opens and closes the upper opening part of the washing tank;
Along with a sliding operation in the front-rear direction of the cleaning tank, an inner lid opening and closing mechanism that opens and closes the upper opening portion of the cleaning tank with the inner lid,
The inner lid opening / closing mechanism includes an inner lid moving mechanism that moves the inner lid in accordance with a sliding operation of the cleaning tank in the front-rear direction, and an inner lid that guides the movement of the inner lid by the inner lid moving mechanism in an obliquely vertical direction. Assuming a drawer-type dishwasher composed of a guide mechanism,
The inner lid guide mechanism is composed of a pair of left and right guide grooves formed in the cleaning machine main body in a slanting vertical direction, and a pair of left and right guide rollers provided in the inner lid and guided by the guide grooves,
The inner lid moving mechanism is pivotally supported by the main body of the cleaning machine and is rotated by a sliding operation of the cleaning tank, and the rotating cam moves the guide roller of the inner lid by the rotating operation. And a reversing spring that reversely applies an urging force to the rotating cam.

With this configuration, when the cleaning tank is moved forward or backward, the rotating cam is rotated in one direction or in the opposite direction, and the rotating cam rotates the pair of left and right guide rollers. The inner lid is moved. The movement of the inner lid can be performed by opening and closing the inner lid by being guided obliquely in the vertical direction by the inner lid guide mechanism. The reversing spring that applies a biasing force to the rotating cam is switched so as to act only in the direction of opening the inner lid at the open position and only in the direction of closing the inner lid at the closed position.
In this way, since the pair of left and right guide rollers of the inner lid can be moved via the rotating cam by the movement of the cleaning tank, the inner lid can be opened and closed directly. Packing attached to the inner lid compared to the conventional dishwasher shown (which closes the inner lid by pressing the rear end of the inner lid in the washing tank and moving the inner lid backward) Can be uniformly compressed, and the sealing performance of the inner lid can be stabilized.

Further, since the reversing spring for reversing and applying the urging force is provided on the rotating cam, it is applied to the rotating cam at the final stage of the storing operation in which the cleaning tank is slid toward the storing position at the rear. Before the biasing force is reversed, the biasing force is applied in the direction of pushing the cleaning tank forward, but after the biasing force is reversed, the biasing force is applied in the direction of pulling the cleaning tank backward. The
As a result, the cleaning tank and the inner lid are not placed at a halfway position in the final stage of the housing operation, and the direction of the urging force applied to the rotating cam is reversed, the cleaning tank is surely Since the inner lid is securely sealed while being pulled into the storage position, it is possible to prevent water leakage, false detection, or malfunction caused by half-opening. Further, when the cleaning tank is in the storage position, the inner lid is always pulled down in the sealing direction by the urging force of the reversing spring, so that the sealing performance of the inner lid can be increased.

On the contrary, in the initial stage of the pulling-out operation in which the cleaning tank is pulled out from the storage position and slid forward, the direction in which the cleaning tank is pulled backward before the biasing force applied to the rotating cam is reversed. However, after the biasing force is reversed, the biasing force is applied in the direction of pushing the cleaning tank forward.
Thereby, in the initial stage of the drawer operation of the cleaning tank, when the direction of the urging force applied to the rotating cam is reversed, the cleaning tank is pushed forward, in particular, the dishes are stored. When the washing tank is heavy, the operability during pulling out is greatly improved. Moreover, since the inner lid is pushed upward by the rotating cam, the inner lid can be opened reliably.

(2) In the drawer type dishwasher, the rotating cam includes first to third cam arms, and a drive pin provided in the cleaning tank is disposed between the first and second cam arms. A pair of left and right guide rollers provided on the inner lid are arranged between the second and third cam arms,
The first and second cam arms are shaped to rotate the rotating cam when the drive pin is moved in the front-rear direction, and the second and third cam arms are rotated by the rotating cam. In this case, a shape in which force is applied to the pair of left and right guide rollers in the direction along the guide groove is preferable. (Corresponding to claim 2)

According to such a configuration, when the cleaning tank is moved forward or backward, the drive pin disposed between the first and second cam arms also moves, so that the rotating cam can move in one direction or It is rotated in the reverse direction. When the rotating cam is rotated in this manner, the second and third cam arms can apply a force in a direction along the guide groove to the pair of left and right guide rollers disposed therebetween. Therefore, the inner lid can be smoothly and efficiently moved along the guide groove.
Thereby, the packing attached to the inner lid can be more uniformly compressed, and the sealing performance of the inner lid can be further stabilized.

The dishwasher of the present invention produces the following effects.
Since the inner lid can be opened and closed directly via the rotating cam by the movement of the washing tank, the packing attached to the inner lid can be uniformly compressed, and the sealing performance of the inner lid is stable. Can be made.
In addition, since the reversing spring for reversing and applying the urging force is provided on the rotating cam, the cleaning tank and the inner lid are not placed at a halfway position in the final stage of the storing operation, and the rotating cam When the direction of the urging force applied to is reversed, the cleaning tank is reliably pulled into the storage position, and the inner lid is also securely sealed. Thereby, the water leak, false detection, or malfunction which generate | occur | produces by half opening can be prevented. Furthermore, when the cleaning tank is in the storage position, the inner lid is always pulled down in the sealing direction by the urging force of the reversing spring, so that the sealing performance of the inner lid can be increased.

Also, since the reversing spring is provided in the rotating cam as described above, when the direction of the biasing force applied to the rotating cam is reversed in the initial stage of the cleaning tank drawing operation, the cleaning tank Pushed forward. Thereby, not only the operability of the dishwasher is greatly improved, but the inner lid is pushed upward by the rotating cam, so that the inner lid can be reliably opened.
Furthermore, the opening operation of the inner lid in the drawer operation of the cleaning tank is performed by pushing the inner lid directly upward on the upper side by a rotating cam without using an elastic body such as a spring that constantly urges the inner lid forward. This reduces the number of parts.

Below, the Example of the dishwasher of this invention is described, referring FIGS. 1-3. FIGS. 1 and 2 are partial longitudinal sectional views for explaining the opening / closing mechanism and closing / opening operation of the inner lid of the dishwasher, and FIG. 3 is an explanatory view of the opening / closing mechanism of the inner lid.
The present invention is an improvement of the opening / closing mechanism of the inner lid in the conventional dishwasher described above, and the rest of the configuration is mostly in common with the conventional dishwasher. The description will focus on the opening / closing mechanism of the inner lid, and the description of other common configurations will be omitted. Moreover, in description of a present Example, the part which is common in the conventional dishwasher shown in FIGS. 4-6 is demonstrated using the same code | symbol.

[Configuration of inner lid opening and closing mechanism]
The basic structure of the dishwasher according to the embodiment of the present invention is the same as that of the conventional one, and as shown in FIGS. 20, a cleaning tank 21 slidable forward or backward with respect to the cleaning machine body 20, and an inner lid 30 that is disposed at an upper part in the cleaning machine body 20 and opens and closes an upper open portion of the cleaning tank 21. Consists of.
The opening / closing mechanism of the inner lid of the present embodiment is a rotating cam mechanism including the rotating cam 2 and the reversing spring 8, and an “inner cover moving mechanism” provided on the left and right inner sides above the rear part of the cleaning machine body 20. The inner and outer guide guides 11 and 12 and the front and rear guide rollers 18 and 19 are provided on the right and left sides above the front and rear of the cleaning machine body 20 and the inner lid 30. ]. The front and rear guide rollers 18 and 19 can be replaced with guide pins.

  The rotating cam 2 constituting the rotating cam mechanism (inner lid moving mechanism) is pivotally supported by the rotating shaft 1 with respect to the washing machine body 20 so as to be rotatable, and includes a first cam arm 3 and a second cam arm. 4 and the third cam arm 5 are provided. A reversing spring 8 is attached between the third cam arm and the main body 20 of the washing machine. Depending on the rotation angle of the rotating cam 2, the rotating cam 2 is biased clockwise or counterclockwise. The center-over mechanism that provides The rotating cam 2 can be rotated within an angular range regulated by a pair of rotation stoppers 6 and 7 provided in the washing machine body 20.

The center over mechanism will be described with reference to FIG. When the rotating cam 2 is rotated clockwise or counterclockwise about the rotating shaft 1, the reversing spring 8 is similarly rotated about the locking portion on the washing machine body 20 side. The position of the center line of the reversing spring 8 moves with respect to the rotating shaft 1. If the position of the center line of the reversing spring 8 is on the front side of the rotating shaft 1 (position in FIG. 1 (a)), the rotating cam 2 is urged counterclockwise. If it is on the rear side of the shaft 1 (position in FIG. 1 (c)), the rotating cam 2 is urged clockwise.
Therefore, when the rotating cam 2 is rotated about the rotating shaft 1, the direction of the urging force applied to the rotating cam 2 by the reversing spring 8 is such that the center line of the reversing spring 8 is the rotating shaft 1. Is reversed at the reversal position where it overlaps.

Between the first cam arm 3 and the second cam arm 4 of the rotating cam 2, drive pins 15 provided on both the left and right sides of the cleaning tank 21 are disposed, and the rear part of the first cam arm 3 is disposed. On the side, when the rotation cam 2 is rotated clockwise, the drive pin 15 is pulled backward, or the drive pin 15 moved forward rotates the rotation cam 2 counterclockwise. It has a shape that can be done. Further, the front side of the second cam arm 4 is when the drive pin 15 moved rearward rotates the rotating cam 2 clockwise or when the rotating cam 2 rotates counterclockwise. The drive pin 15 can be pushed forward.
On the other hand, between the second cam arm 4 and the third cam arm 5 of the rotating cam 2, rear guide rollers 19 provided on the left and right sides of the rear portion of the inner lid 30 via the rear side plates 17 are arranged. The rear side of the second cam arm 4 can push the rear guide roller 19 downward and rearward along the inclined portion of the rear guide groove 12 when the rotary cam 2 is rotated clockwise. It has a shape. Further, the front side of the third cam arm 5 can push the rear guide roller 19 upward along the inclined portion of the rear guide groove 12 when the rotary cam 2 is rotated counterclockwise. It has a shape that can be done. In the present embodiment, the rear guide roller 19 is disposed between the second cam arm 4 and the third cam arm 5 of the rotating cam 2. By providing on the side, the front guide roller 18 can also be arranged.
The operation of the rotating cam 2 including the three cam arms will be described in detail in “Operation of the inner lid opening / closing mechanism” described later.

As shown in FIG. 1, the pair of front guide grooves 11 and rear guide grooves 12 constituting the inner lid guide mechanism are formed on the left and right sides above the front and rear parts of the washing machine body 20, respectively. Each of the guide grooves 11 and 12 is formed in a substantially “F” shape including a front horizontal portion and a rear inclined portion. In the present embodiment, the guide grooves 11 and 12 are formed in a substantially “F” shape, but if the upper surface of the inner cover 30 does not contact the cleaning machine body 20 at the open position, It may be a straight long hole extending in the front diagonal direction.
Similarly, a pair of front guide rollers 18 and a rear guide roller 19 that constitute the inner lid guide mechanism are provided on a pair of front side plates 16 and rear side plates 17 provided on the left and right sides of the front and rear portions of the inner lid 30. It is attached and engaged with the pair of front and rear guide grooves 11, 12, respectively.
Since the inner lid guide mechanism is configured in this manner, when the forward or backward force is applied to the inner lid 30 and the inner lid 30 is moved with respect to the washing machine body 20, the inner lid 30 Guided by the rear guide grooves 11, 12, it moves between the upper front position and the lower rear position to open and close the upper open portion of the cleaning tank 21.

Next, the operation of the opening / closing mechanism for the inner lid will be described.
[Inner lid closing operation]
First, the closing operation of pushing the cleaning tank 21 drawn forward toward the housing position and closing the inner lid 30 will be described with reference to FIGS. FIG. 1 (a) shows a state where the cleaning tank is pulled out and the inner lid is opened, FIG. 1 (b) shows a state where the inner lid starts to close while the cleaning tank is being pushed in, and FIG. The cleaning tank is pushed into the storage position and the inner lid is closed.
As shown in FIG. 1 (a), when the cleaning tank 21 is pulled forward, the drive pin 15 provided in the cleaning tank 21 is connected to the first and second cam arms 3 of the rotating cam 2. , 4 is not engaged with the rotating cam 2, and the reversing spring 8 is applied with a counterclockwise urging force to contact the rotation stopper 6. In this state, the third cam arm 5 of the rotating cam 2 applies a forward force to the rear guide roller 19, so that the front and rear guide rollers 18, 19 are in the front and rear guide grooves 11. 12 is held at the upper front position, and the inner lid 30 is in an open state.

When the cleaning tank 21 is pushed toward the rear receiving position from the state in which the cleaning tank 21 is pulled out in this way, as shown in FIG. The drive pin 15 engages with the front side of the second cam arm 4 of the rotating cam 2 to rotate the rotating cam 2 clockwise. At this time, the rear side of the second cam arm 4 applies a downward force to the rear guide roller 19, so that the front and rear guide rollers 18, 19 are guided to the front and rear guide grooves 11, 12. And moved to the lower rear. As a result, the inner lid 30 is also moved downward and rearward (backward obliquely downward) toward the closed position.
When the rotating cam 2 is pushed by the drive pin 15 and rotated clockwise about the rotating shaft 1, in the initial stage, the reversing spring 8 acts to turn the rotating cam 2 counterclockwise. Since an urging force is applied, a force that pushes the cleaning tank 21 forward and a force that returns the inner lid 30 forward act on the urging force of the reversing spring 8 as the rotating cam 2 rotates. When the direction is reversed clockwise, a force for pulling the cleaning tank 21 toward the rear storage position and a force for lowering the inner lid 30 downward act.

  When the cleaning tank 21 is pushed further rearward toward the accommodation position, the rotating cam 2 is pushed further by the driving pin 15 and further rotated clockwise, and the second cam arm 4 is moved with respect to the rear guide roller 19. Since the force is continuously applied, the front and rear guide rollers 18 and 19 are moved to the rear lower end positions of the front and rear guide grooves 11 and 12 as shown in FIG. At this time, since the urging force in the clockwise direction is applied to the rotating cam 2 by the action of the reversing spring 8, the cleaning tank 21 is pulled into the storage position and the inner lid 30 is pulled down rearward.

Thus, in the final stage of the storing operation in which the cleaning tank 21 is housed in the storing position of the cleaning machine body 20, the direction of the urging force applied to the rotating cam 2 is reversed by the action of the reversing spring 8, and before the reversing. After the reversal, the force acting on the cleaning tank 21 is reversed.
Thereby, the cleaning tank 21 and the inner lid 30 are not placed at a halfway position, and if the direction of the urging force to the rotating cam 2 is reversed, the cleaning tank 21 is surely drawn into the storage position, Since the inner lid 30 is also tightly sealed, it is possible to prevent water leakage, erroneous detection, or malfunction caused by half-opening.
Further, when the cleaning tank 21 is in the storage position, the inner lid 30 is always pulled down in the sealing direction by the urging force of the reversing spring 8, so that the sealing performance of the inner lid 30 can be increased. Furthermore, in order to position the inner lid 30, if the sealing surface on the side of the cleaning tank 21 is tapered, the inner lid 30 can be closed even if the position of the inner lid 30 with respect to the cleaning tank 21 is slightly shifted. Misalignment can be corrected by being guided during operation.

[About the opening operation of the inner lid]
Next, an opening operation for opening the inner lid 30 by pulling the cleaning tank 21 at the housing position in the cleaning machine body 20 forward will be described with reference to FIGS. This opening operation is completely opposite to the closing operation of the inner lid 30 already described.
FIG. 2 (a) shows a state in which the cleaning tank is in the storage position and the inner lid is closed, and FIG. 2 (b) shows a state in which the inner lid starts to open while the cleaning tank is being pulled out. Shows a state where the cleaning tank is pulled out and the inner lid is opened, and FIG. 2D shows a state where the cleaning tank is further pulled out.
As shown in FIG. 2 (a), in the state where the cleaning tank 21 is in the receiving position in the cleaning machine body 20, the rotating cam 2 is urged clockwise by the action of the reversing spring 8, It is in contact with the rotation stopper 7. In this state, the second cam arm 4 of the rotating cam 2 applies a downward rearward force to the rear guide roller 19, so that the front and rear guide rollers 18, 19 are in the front and rear guide grooves. 11 and 12 are held at the lower rear position, and the inner lid 30 is in a sealed state.

When the cleaning tank 21 is pulled forward from the state where the cleaning tank 21 is in the housing position in this way, the drive pin 15 of the cleaning tank 21 is moved to the second position of the rotary cam 2 as shown in FIG. Engaging with one cam arm 3, the rotating cam 2 is rotated counterclockwise against the urging force of the reversing spring 8. At this time, since the third cam arm 5 applies a forward force to the rear guide roller 19, the front and rear guide rollers 18, 19 are guided by the front and rear guide grooves 11, 12 and are then moved to the upper front. Moved to. As a result, the inner lid 30 is moved to the upper front side (front obliquely upward) toward the open position.
When the cleaning tank 21 is further pulled forward a little, the rotating cam 2 is slightly rotated counterclockwise, and the third cam arm 5 continues to apply force to the rear guide roller 19, so that the front and rear portions As shown in FIG. 2C, the guide rollers 18 and 19 are moved to the upper front position of the front and rear guide grooves 11 and 12 (the front upper end position of the inclined portion of the guide groove).
In this way, the cleaning tank 21 is pulled out from the storage position, and the inner lid 30 opens the upper open portion of the cleaning tank 21.

  As the cleaning tank 21 is pulled out, the rotating cam 2 is rotated counterclockwise about the rotating shaft 1. At this initial stage, the reversing spring 8 acts to turn the rotating cam 2. Since a clockwise urging force is applied, a force for returning the cleaning tank 21 to the accommodation position and a force for returning the inner lid 30 to the sealed position act. On the other hand, when the rotation of the rotating cam 2 advances and the direction of the urging force by the reversing spring 8 is reversed counterclockwise, a force that pushes the cleaning tank 21 forward and a force that pushes the inner lid 30 forward act. To do.

  Further, as shown in FIG. 2 (d), the cleaning tank 21 can be further drawn forward from the position of FIG. 2 (c). At this time, the drive pin 15 of the cleaning tank 21 escapes forward from between the first cam arm 3 and the second cam arm 4 of the rotating cam 2, which contributes to rotating the rotating cam 2. However, the rotating cam 2 is rotated counterclockwise by the urging force of the reversing spring 8 and abuts against the rotation stopper 6. By rotating the rotating cam 2 counterclockwise, the third cam arm 5 pushes the rear guide roller 19 upward and forward, so that the inner lid 30 is guided to the horizontal portions of the front and rear guide grooves 11 and 12. And move forward a little.

Thus, in the initial stage of the pulling-out operation in which the cleaning tank 21 is pulled out from the housing position of the cleaning machine body 20, the direction of the urging force applied to the rotating cam 2 is reversed by the action of the reversing spring 8, and before the reversal. After the reversal, the force acting on the cleaning tank 21 is reversed.
As a result, if the direction of the urging force applied to the rotating cam 2 is reversed after starting the drawing operation of the cleaning tank 21, the cleaning tank 21 is pushed forward, so that the operability is greatly improved. . Further, since the inner lid 30 is pushed upward by the rotating cam 2, the inner lid 30 can be reliably opened.

Is a schematic partial longitudinal sectional view for explaining the opening and closing mechanism and closing operation of the inner lid in the dishwasher of the embodiment of the present invention, (a) is a state in which the cleaning tank is pulled out and the inner lid is opened, (b) shows the state where the cleaning tank is being pushed in and the inner lid has started to close, and (c) shows the state where the cleaning tank is in the storage position and the inner lid is closed. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic partial longitudinal sectional view illustrating an opening / closing mechanism and an opening operation of an inner lid in a dishwasher according to an embodiment of the present invention, and (a) is a state where a cleaning tank is in a storage position and an inner lid is closed. (B) is the state where the cleaning tank is started to be pulled out and the opening operation of the inner lid is started, (c) is the state where the cleaning tank is pulled out and the inner lid is opened, and (d) is the state where the cleaning tank is further pulled out. Indicates the status. These are the typical explanatory drawings of the opening / closing mechanism of the inner lid in the dishwasher of the embodiment of the present invention, (a) is a partial cross-sectional view near the opening / closing mechanism of the inner lid, (b) is the upper part of the inner lid It is the top view seen from. These are the typical longitudinal cross-sectional views of the conventional tableware washing machine, and show the state by which the washing tank was accommodated in the washing machine main body. These are the typical longitudinal cross-sectional views of the conventional tableware washing machine, and show the state by which the washing tank was pulled out from the washing machine main body. These are the typical fragmentary enlarged views of the conventional tableware washing machine, (a) is a perspective view of an inner lid opening / closing mechanism, (b) is a perspective view of a holding mechanism and a lock mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2 ... Rotating cam 3 ... 1st cam arm 4 ... 2nd cam arm 5 ... 3rd cam arm 6, 7 ... Anti-rotation 8 ... Reversing spring 11 ... Front guide groove 12 ... Rear guide groove 15 ... Drive pin 16 ... Front side plate 17 ... Rear side plate 18 ... Front guide roller 19 ... Rear guide roller 20 ... Washing machine body 21 ... Washing tank 30 ... Inner lid 33 ... Packing

Claims (2)

A washer body having a front opening;
A cleaning tank that is slidable in the front-rear direction at the front opening part of the washing machine body, and has an upper opening part,
An inner lid that is provided on the inner upper part of the washing machine main body, has a packing attached to the lower surface, and opens and closes the upper opening part of the washing tank;
Along with a sliding operation in the front-rear direction of the cleaning tank, an inner lid opening and closing mechanism that opens and closes the upper opening portion of the cleaning tank with the inner lid,
The inner lid opening / closing mechanism includes an inner lid moving mechanism that moves the inner lid in accordance with a sliding operation of the cleaning tank in the front-rear direction, and an inner lid that guides the movement of the inner lid by the inner lid moving mechanism in an obliquely vertical direction. In a drawer type dishwasher composed of a guide mechanism,
The inner lid guide mechanism is composed of a pair of left and right guide grooves formed in the cleaning machine main body in a slanting vertical direction, and a pair of left and right guide rollers provided in the inner lid and guided by the guide grooves,
The inner lid moving mechanism is pivotally supported by the main body of the cleaning machine and is rotated by a sliding operation of the cleaning tank, and the rotating cam moves the guide roller of the inner lid by the rotating operation. And a reversing spring for reversing and applying an urging force to the rotating cam. The rotating cam includes first to third cam arms, and a drive pin provided in the cleaning tank is disposed between the first and second cam arms, and between the second and third cam arms. Is provided with a pair of left and right guide rollers provided on the inner lid,
The first and second cam arms are shaped to rotate the rotating cam when the drive pin is moved in the front-rear direction, and the second and third cam arms are rotated by the rotating cam. 2. The drawer type dishwasher according to claim 1, wherein the drawer-type dishwasher is configured to apply a force in a direction along the guide groove to the pair of left and right guide rollers.

Images