JP4656588B2 - Dishwasher - Google Patents

Description

  The present invention relates to a pull-out type dishwasher for performing steps such as washing, rinsing and drying of tableware and cooking utensils (hereinafter referred to as tableware), and in particular, draws a washing tank into a storage position in the main body of the washing machine. It is related with the dishwasher provided with the washing tank drawing-in mechanism hold | maintained by.

In the built-in type dishwasher, the dishes are put in the washing tank drawn out from the washing machine body, and the washing tank is pushed into the washing machine body and held in the storage position so that the upper opening of the washing tank is opened. After sealing with a lid, the dishes are washed and dried by performing various steps such as washing, rinsing and drying.
In such a dishwasher, it is well known that the washing tank is manually pulled out or pushed in by the user, and the movement of this washing tank is smooth and free of impact and has good operability. It is necessary to be able to move easily. Further, when the washing tank is pushed into the washing machine main body, it is necessary to be surely drawn into and held in the storage position.

In a dishwasher, it is possible to employ a reversing mechanism (center-over mechanism) as a mechanism for pulling and holding the washing tank in the storage position in the main body of the cleaning machine (Japanese Patent Application Laid-Open No. 2002-291553 ("Storage device", Patent Document 1) )It is described in.
The conventional dishwasher described in Patent Document 1 will be described with reference to FIGS. FIG. 6 is a longitudinal sectional view of the dishwasher, and FIG. 7 is a view showing the main part of the dishwasher. FIG. 8 is an operation explanatory diagram when the cleaning tank is pushed into the storage position, and FIG. 9 is an operation explanatory diagram when the cleaning tank is pulled out from the storage position.
In each of the above drawings, the left side of the drawing is described as “front (side): B direction”, and the right side is described as “rear (side): A direction”. Further, the relative position of the cleaning tank 2 with respect to the cleaning machine body 1 is indicated by reference numerals “C” to “G” with reference to the rear end of the cleaning tank 2.

[Configuration of conventional dishwasher]
First, the structure of the conventional dishwasher is demonstrated, referring FIG.6 and FIG.7. This conventional dishwasher includes a box-shaped washing machine body 1 having an open front surface, and a washing tank 2 that can be stored in a storage space of the washing machine body 1 and has an upper opening. A cleaning / drainage pump 3 and the like are disposed below the bottom of the cleaning tank 2, and a cleaning nozzle 4 and a heater 5 are disposed inside the cleaning tank 2. It is assembled. Further, a cleaning basket 6 for storing tableware and the like is provided inside the cleaning tank 2 so as to be freely taken out.

  A pair of slide mechanisms 7 composed of rails or the like are provided on the left and right inner sides of the cleaning machine main body 1, and the cleaning tank 2 moves backward relative to the cleaning machine main body 1 in the storage movement direction indicated by an arrow A, Alternatively, the slide movement is possible in the forward pulling movement direction indicated by the arrow B. A door (main body lid) 9 having a handle 8 and the like is attached to the front surface of the cleaning tank 2 and is slid rearward (in the storage movement direction), so that the cleaning tank 2 is cleaned as shown in FIG. As shown in FIG. 7, the washing tank 2 can be cleaned and dried while being held in the storage position in the main body 1, and is slid forwardly (withdrawal movement direction). Is pulled out from the washing machine main body 1 so that the tableware and the washing basket 6 can be taken out and stored. Further, a lid body 10 that seals the upper opening of the cleaning tank 2 at the storage position of the cleaning tank 2 is attached to the upper inside of the cleaning machine main body 1.

  As shown in FIG. 7, a rack 41 along the moving direction (front-rear direction) of the cleaning tank 2 is attached to one of the left and right inner sides of the cleaning machine main body 1, and a damper type storage buffer is provided on the cleaning tank 2 side. A rotary damper 42 as a means is attached, and a pinion 43 projecting downward from the rotary damper 42 is provided so as to be able to mesh with or detach from the rack 41 on the washing machine main body 1 side. The rotary damper 42 is filled with a fluid such as oil and gives resistance to the rotating body (not shown) rotating in conjunction with the pinion 43 by a fluid, thereby braking the rotation of the pinion 43. It is a one-way type that applies braking to the rotation of the pinion 43 only when the cleaning tank 2 is moved backward.

  In the dishwasher having such a configuration, the washing tub 2 which is drawn forward from the washing machine main body 1 and is in the pulling position D (the position where the rear end of the washing tub is located at the position D in FIG. 8A). Is moved rearward and moved toward the storage position C (see FIGS. 9A and 7C) stored in the washing machine body 1, the pinion 43 of the rotary damper 42 is moved to the rack. 41, that is, when the pinion 43 reaches the deceleration operation position E (see FIGS. 7A, 7B and 8B) where it engages with the rack 41, the action of the rotary damper 42 causes the pinion 43 to move. Since braking is applied to the rotation, even if the washing tank 2 is moved at a high speed, it is decelerated thereafter and moved slowly. The deceleration with respect to the cleaning tank 2 is for reducing the impact and preventing the user from putting a finger or the like between the cleaning tank 2 and the cleaning machine main body 1. A necessary position, for example, the cleaning tank 2 is set to be about 100 mm before reaching the storage position C.

  A connection pin (catcher pin) 12 projects in the lateral direction behind the right and left sides of the cleaning tank 2, and an inverter 45 (catcher) 45 that engages with the connection pin 12 is connected to the connection pin 12. Is provided behind the left and right sides in the cleaning machine main body 1 so as to correspond to the above. The reversing element 45 is constituted by a substantially L-shaped lever, and an intermediate part thereof is pivotally attached to a pin 46 projecting from the washing machine main body 1. A slit-like pin engagement groove (engagement groove) 45a into which 12 enters is formed. Further, one end side of a spring mounting plate 47 is pivotally attached to the pin 46 projecting from the washing machine main body 1, and a substantially arc-shaped guide groove 47 a is bored at the other end of the spring mounting plate 47. It is installed. A return pin 49 projecting from the return plate 48 is fitted into the guide groove 47 a, and a reversing spring (spring) 50 extends between the lower free end of the reversing element 45 and the spring mounting plate 47. Is stretched.

  The return plate 48 is also constituted by a substantially L-shaped lever, and the return pin 49 projects from the lower free end thereof, and the upper free end thereof is inclined toward the outside of the washing machine body 1. Thus, the inclined guide portion 48a is formed. An intermediate portion of the return plate 48 is rotatably attached around a fixing pin 51 protruding from the cleaning machine main body 1, and at the rear side (storage movement direction side) of the cleaning tank 2 by the return spring 52, that is, In FIG. 7 (a), it is biased to rotate clockwise. In this way, as will be described later, the cleaning tank 2 is urged and moved toward the storage position C or the pull-out position D by the reversing element 45, the spring mounting plate 47, the reversing spring 50, and the like that engage with the connecting pin 12. A reversing mechanism (toggle mechanism) 53 that functions as an urging means is configured. When the spring mounting plate 47 and the return plate 48 constituting the reversing mechanism 53 move to the rear side and the front side (drawing movement direction side) of the cleaning tank 2, the biasing force switching position of the reversing mechanism 53 is changed. Is configured to do.

[Operation of conventional dishwasher]
Next, the operation of the conventional dishwasher having the above-described configuration will be described with reference to FIGS. 7 to 9, mainly focusing on the operation of the rotary damper 42 and the reversing mechanism (toggle mechanism) 53.
A connecting pin (catcher pin) that protrudes from the cleaning tank 2 when the cleaning tank 2 is pushed backward (in the storage movement direction) from the state where it is in the drawer position indicated by “D” in FIG. ) 12 is fitted into the pin engaging groove (engaging groove) 45a of the reversing element (catcher) 45, and the reversing element 45 is rotated clockwise in FIG. As shown in b), when the cleaning tank 2 reaches the deceleration action position E, the pinion 43 protruding from the rotary damper 42 meshes with the rack 41. The pinion 43 rotates as the pinion 43 meshes with the rack 41, but because the rotation of the pinion 43 is braked by the action of the rotary damper 42, even if the washing tank 2 is pushed in vigorously, After the deceleration operation position E, for example, from about 100 mm before the cleaning tank 2 reaches the storage position C, the moving speed of the cleaning tank 2 is decelerated and moved slowly.

  Further, as shown in FIG. 8 (b), the reversing spring 50 of the reversing mechanism 53 exceeds the pin 46 at the same time as the cleaning tank 2 reaches the decelerating action position E or in the vicinity of the front and rear of the decelerating action position E. Since the reversing spring 50 exceeds the over center position H, the reversing element 45 that has been urged to rotate counterclockwise by the reversing spring 50 until then is urged to rotate clockwise. In other words, when the cleaning tank 2 reaches the storage biasing operation position F, the cleaning tank 2 is biased and moved toward the rear storage position C by the action of the reversing mechanism 53. As a result, the cleaning tank 2 is reversed. By the urging movement by the mechanism 53 and the braking by the rotary damper 42, the mechanism 53 is moved to the storage position C at a substantially constant speed, and the upper opening of the cleaning tank 2 is sealed from above by the lid body 10 at the storage position C.

  Further, when the connecting pin 12 moves rearward along with the movement of the cleaning tank 2, the connecting pin 12 is guided by the inclined guide portion 48a of the return plate 48, as shown in FIGS. 7 (b) and 8 (b). As shown in FIG. 7 (c) and FIG. 9 (a), the connecting pin 12 moves while sliding in contact with the side surface of the return plate 48 and the cleaning tank 2 reaches the storage position C. It is located behind the return plate 48. As a result, when the cleaning tank 2 is next pulled forward, the connecting pin 12 first comes into contact with the rear side of the return plate 48 and the return plate 48 is moved to the return spring 52 as shown in FIG. Turn counterclockwise against the biasing force.

  By rotating the return plate 48 counterclockwise, the overcenter position H of the reversing mechanism 53 with respect to the position of the cleaning tank 2 is changed, and the drawer biasing action position on the rear side of the storage biasing action position F described above. In G, the rotation urging direction by the reversing mechanism 53 is switched, and the cleaning tank 2 is urged and moved toward the front drawing position D. In other words, the storage urging action position F is positioned in front of the drawer urging action position G, and the drawer urging action position G is set to about 30 mm from the storage position C. Thus, even if the cleaning tank 2 is pulled out, if the pulling amount is less than 30 mm, the cleaning tank 2 is returned to the storage position C by the action of the reversing mechanism 53, and the pulling amount exceeds 30 mm. Then, it is urged and moved toward the front side. At this time, braking by the rotary damper 42 does not act, and the cleaning tank 2 is pulled out to the front pulling position D relatively quickly.

JP 2002-291553 A

In the dishwasher provided with the reversing mechanism (toggle mechanism) described in Patent Document 1, when the washing tub 2 is pulled out from the storage position C toward the front pulling position D, or the washing tub 2 is pulled out. When pushing in toward the rear storage position C from D, an urging force in the direction of preventing the movement of the cleaning tank 2 may be applied to the cleaning tank 2 by the reversing mechanism 53. Becomes larger and the operability becomes worse. In particular, when starting to draw out the cleaning tank 2 in the storage position C, since a biasing force that prevents the reversing mechanism 53 from being pulled out is applied in addition to starting from a stopped state, a very large drawing force is required and operability is improved. bad.
If the setting of the urging force of the reversing mechanism is weakened in order to improve such operability, when the cleaning tank 2 is moved toward the storage position C, the force for pulling in the cleaning tank 2 is weakened. This causes a problem that the cleaning tank 2 cannot be reliably pulled into the storage position C.

  Therefore, in order to solve the above-described problems, the present invention assists the movement operation of the washing tank by a reversing mechanism (center over mechanism), and ensures that the washing tank is pulled into the storage position. In this case, the urging force by the reversing mechanism that hinders the movement of the cleaning tank is made as small as possible, the operability of the cleaning tank is not impaired, and the pulling force to the cleaning tank is sufficiently secured to ensure that the cleaning tank is in the storage position. It is to devise a reversing mechanism so that it can be pulled in.

The measures taken in order to solve the above problems are as follows.
(1) A dishwasher according to the present invention (corresponding to claim 1) includes a washing machine body,
A cleaning tank that can be stored in a storage space of the cleaning machine body and is movable between a storage position and a drawer position;
A reversing mechanism that comprises a reversing element that is rotated in accordance with the movement of the cleaning tank, and a reversing spring that applies a rotating biasing force to the reversing element, and that assists the movement of the cleaning tank;
Assuming a dishwasher consisting of
By providing a retracting motor that changes the attachment position of one end of the reversing spring, the rotational biasing force applied to the reversing element by the reversing spring is changed.

  With this configuration, the reversing spring can be extended or contracted by driving the retracting motor to adjust the spring force. Therefore, the rotating biasing force applied to the reversing element by the reversing spring can be adjusted as necessary. Can be changed. This increases the rotational biasing force applied to the inverter only when necessary in accordance with the movement position of the cleaning tank, and when it is not necessary, the rotational biasing force can remain small. Although the washing tank can be moved easily and lightly, the washing tank can be reliably pulled into the storage position and securely held in the storage position.

(2) In the dishwasher, when the washing tub is moved toward the storage position and reaches the pull-in start position, or when the cleaning tub is in the storage position and the start button is pressed, By rotating the reversing spring by driving the retracting motor, the rotational biasing force applied to the reversing element can be increased. (Corresponding to claim 2)
According to such a configuration, when the cleaning tank is moved toward the rear storage position and reaches the drawing start position, the reversing spring can be extended to increase the rotational biasing force applied to the reversing element. In addition to being able to lightly and easily move the cleaning tank to the storage position, the cleaning tank can be reliably pulled into the storage position. In addition, the cleaning tank can be securely held in the storage position.
In addition, when the washing tank is in the stowed position and the start button is pressed, the reversing spring can be extended to increase the rotational biasing force applied to the reversing element. The tank can be securely held in the storage position.

(3) Further, in the dishwasher, when the operation of the washing process in the dishwasher or all operations are completed, or after the washing tank reaches the storage position, the operation is not started and a predetermined time has elapsed. When the pulling motor is driven to contract the reversing spring, the rotational biasing force applied to the reversing element can be reduced. (Corresponding to claim 3)
According to such a configuration, when the operation of the washing process or all the operations in the dishwasher is completed, or when the operation is not started and the predetermined time has elapsed after the washing tank reaches the storage position, the reversing spring Therefore, when the cleaning tank is pulled out from the storage position, the moving operation can be performed lightly and easily.

Only when it is necessary to correspond to the moving position of the washing tank, the pulling motor can be driven to increase the rotational biasing force applied to the reversal element, so that the moving operation of the washing tank is light and easy. Therefore, the cleaning tank can be reliably pulled into the storage position, and the cleaning tank can be securely held in this storage position.
When the cleaning tank reaches the pull-in start position, the reversing spring can be extended to increase the rotational biasing force applied to the reversing element, so that the moving operation of the cleaning tank to the storage position can be performed lightly and easily. In addition, the cleaning tank can be reliably pulled into the storage position, and the cleaning tank can be securely held at the storage position.
In addition, when the washing tank is in the stowed position and the start button is pressed, the reversing spring can be extended to increase the rotational biasing force applied to the reversing element. The tank can be securely held in the storage position.
Furthermore, when the operation of the washing process or all the operations in the dishwasher is completed, or when the operation is not started after the washing tank reaches the storage position, the reversing spring is contracted and the reversing element is contracted. Since the rotational urging force applied to is reduced, the moving operation can be performed lightly and easily when the washing tank is pulled out from the storage position.

Below, the Example of the dishwasher of this invention is described, referring FIGS. 1-2.
The present invention is an improvement of the reversing mechanism (center over mechanism) for applying a biasing force to the washing tank moved in the front-rear direction in the conventional dishwashing machine, and the other configurations are conventional. Since it is common with the dishwasher, in the description of the present embodiment, the reversing mechanism will be mainly described, and 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. 6-9 is demonstrated using the same code | symbol.

[Configuration of reversing mechanism]
First, the structure of the reversing mechanism 20 of the dishwasher according to the embodiment of the present invention will be described with reference to FIG. 1A and 1B are schematic views of the reversing mechanism when the cleaning tank is drawn out, where FIG. 1A is a front view and FIG. 1B is a side view.
The reversing mechanism 20 basically has a configuration similar to the reversing mechanism 53 (see FIG. 7) of the conventional dishwasher, and the pivot pin 22 with respect to the rear inner surface of the washing machine body 1. And a reversing spring 23 for applying a rotating biasing force to the reversing element 21 and a spring biasing force changing means 25 for extending and contracting the reversing spring 23.

The inverter 21 is formed of a substantially “<”-shaped lever, and a slit-like pin engaging groove 21 a is formed on one end side of the lever 21, and the pin engaging groove 21 a is located behind the cleaning tank 2. A connecting pin 12 protruding from the outer surface is inserted. Further, the reversing element 21 is formed with a spring locking piece 21 b that locks one end of the reversing spring 23.
The spring urging force changing means 25 is formed at an eccentric position on the rotary plate 28, a rotary plate 28 coupled to a drive shaft 27 of the pull-in motor 26, a pulling motor 26 such as a geared motor. A spring engaging portion 28a that locks the other end of the reversing spring 23, a retracting motor position sensor 31 that detects whether the reversing spring 23 is expanded or contracted, and a motor fixing that fixes the retracting motor 26 to the cleaning machine body 1. It consists of a plate 30. In this embodiment, a geared motor is used as the retracting motor 26, but the reversing spring 23 can be extended or contracted by employing a linear reciprocating mechanism used in an electromagnetic valve or the like.

The reversing spring 23 is stretched between a spring locking piece 21b of the reversing element 21 and a spring engaging portion 28a on the rotating plate 28, and the reversing element 21 is turned clockwise or counterclockwise. Add
When the retracting motor 26 of the spring biasing force changing means 25 is driven, the rotating plate 28 is rotated and the spring engaging portion 28a revolves around the drive shaft 27, whereby the reversing spring 23 is expanded or contracted. If the pulling motor position sensor 31 detects that the reversing spring 23 is expanded or contracted and the pulling motor 26 is stopped, the rotational biasing force applied to the reversing element 21 can be changed.

[Configuration of control unit of dishwasher]
Next, the structure of the control part 13 of the dishwasher by a present Example is demonstrated, referring FIG.3 and FIG.4. FIG. 3 is a block diagram relating to the control unit of the dishwasher, and FIG. 4 is a schematic diagram for explaining the attachment position of the drawing position sensor and the storage position sensor with respect to the movement position of the washing tank and the operating state of the reversing mechanism.
As shown in FIG. 3, the control unit 13 of the dishwasher includes a CPU, a RAM, a ROM, a timer, and the like, receives input signals from various operation buttons 18 and various sensors 19, and displays / informs. A control means 14 for operating the means 17 and a load drive circuit 15 for driving various devices such as the washing / drainage pump 3, the water supply electromagnetic valve 16a, the heater 5, and the drying fan 16b by a command signal output from the control means 14. It is composed of
Such a control unit 13 is basically the same as the control unit of a conventional dishwasher, but in the present embodiment, the retracting motor position sensor 31, the storage position sensor 32, and the retracting position are further used as sensors. A sensor 33 is provided, and a pull-in motor 26 is provided as a device driven by the load drive circuit 15.

As described above, the pulling motor 26 and the pulling motor position sensor 31 are provided as devices constituting the spring biasing force changing means 25, and the pulling motor 26 is driven by the pulling motor position sensor 31. Thus, when the reversing spring 23 is expanded or contracted, the reversing spring is detected to detect the expansion or contraction (see FIG. 1B).
Further, as shown schematically in FIG. 4, the storage position sensor 32 and the pull-in position sensor 33 are cleaned so that the moving position of the cleaning tank 2 in the cleaning machine body 1 can be detected. It is attached to a predetermined position of the machine body 1. The storage position sensor 32 is used to detect that the cleaning tank 2 has reached the specified storage position C of the cleaning machine main body 1, and the pull-in position sensor 33 is a storage position C located behind the cleaning tank 2. This is for detecting that the pull-in start position I has been reached while being moved toward. The pull-in start position I is a position of the cleaning tank 2 that starts the operation of pulling the cleaning tank 2 into the rear storage position C by driving the pull-in motor 26 and extending the reversing spring.

This pull-in start position I is selected at a position where the reversing mechanism 20 is in the over center position or in the vicinity of the front and rear of the over center position during the rearward movement of the cleaning tank 2. The cleaning tank 2 is attached at a position where it can be detected that the cleaning tank 2 has reached the pull-in start position I.
As a specific example, as schematically shown in FIG. 4, in the dishwasher in which the washing tub 2 is pulled out by 500 mm and becomes the drawer position D, the pull-in position sensor 33 detects the pull-in start position I. Is attached so as to output a detection signal when the cleaning tank 2 is moved 30 mm before the storage position C.

[Operation of reversing mechanism]
Next, the operation of the reversing mechanism 20 will be described with reference to FIG. 1 (b), FIG. 2 and FIG. FIG. 1B and FIG. 2 are schematic diagrams for explaining the operation of the reversing mechanism, and FIG. 4 explains the attachment position of the drawing position sensor and the storage position sensor with respect to the moving position of the cleaning tank and the operating state of the reversing mechanism. It is a schematic diagram.
The reversing mechanism 20 having the above-described configuration is controlled by the control unit 13 and operates as follows with the movement of the cleaning tank 2.
When the cleaning tank 2 is in the front drawer position D (see FIG. 4) (when the cleaning tank is moved further forward (to the left) than the position shown in FIG. 1B), The reversing element 21 of the reversing mechanism 20 is urged to rotate counterclockwise by a reversing spring 23, and is stopped at a position shown in FIG. 1B by a stopper (not shown). In such a state, the reversing spring 23 is in a contracted state, and a minimum rotational biasing force is applied to the reversing element 21. Further, both the pull-in position sensor 33 and the storage position sensor 32 are in an off state.

From this state, when the cleaning tank 2 is pushed toward the rear storage position C, the connecting pin 12 protruding from the cleaning tank 2 engages with the pin engaging groove 21a of the inverter 21 (FIG. 1). (See (b)). Further, when the cleaning tank 2 is pushed rearward, the connecting pin 12 moves rearward, so that the reversing element 21 rotates clockwise against the counterclockwise rotational biasing force of the reversing spring 23. Then, as shown in FIG. 2A, the cleaning tank 2 reaches the drawing start position I (a position selected in a range including the over center position of the reversing mechanism 20 and the vicinity thereof).
At this time, the reversing spring 23 is in a contracted state, and since the rotational biasing force applied to the reversing element 21 is small, the cleaning tank 2 can easily move.

When the cleaning tank 2 reaches the pulling start position I, the pulling position sensor 33 is turned on, and the rotating plate 28 is rotated clockwise by the pulling motor 26, whereby the reversing spring 23 in the contracted state is extended. As shown in FIG. 2B, when the rotating plate 28 is rotated to the maximum extension position of the reversing spring 23, the pulling motor position sensor 31 detects this and stops the pulling motor 26. At this time, since the clockwise rotating biasing force increased by the reversing reversing spring 23 is applied to the reversing element 21, the cleaning tank 2 is surely moved toward the storage position C via the connecting pin 12. Be drawn.
The retracting operation of the cleaning tank 2 by the reversing mechanism 20 including the spring urging force changing means 25 is performed after the cleaning tank 2 reaches the retracting start position I as shown in FIG. When the storage position C is reached, the cleaning tank 2 is securely held at that position. When the cleaning tank 2 reaches the specified storage position C, the storage position sensor 32 is turned on and can be detected. When the cleaning tank 2 is drawn forward from the storage position C, the storage position sensor 32 is turned off.

  Further, when the cleaning tank 2 is at the storage position C and the reversing spring 23 of the reversing mechanism 20 is in the extended state, when the retraction motor 26 is driven to rotate the rotating plate 28 in the clockwise direction, the reversing spring 23 is in the extended state. Is shrunk from. When the rotating plate 28 is rotated to the minimum contraction position (the position shown in FIGS. 1B and 2A) of the reversing spring 23, the retracting motor position sensor 31 detects this and stops the retracting motor 26. Let At this time, since the rotational biasing force applied to the inverter 21 is small, the cleaning tank 2 can be easily pulled out forward.

The dishwasher described in the above embodiment is not provided with a storage buffering means. However, as in the conventional example, when the cleaning tank is moved to the rear storage position, the movement of the cleaning tank is decelerated. It goes without saying that storage buffer means such as a rotary damper may be provided.
When the washing tub is moved toward the storage position, the dishwasher provided with such storage buffer means can smoothly move the cleaning tub to the storage position after absorbing the shock. Even when tableware is put in the washing tank and is heavy, after the shock is absorbed by the storage buffering means, the washing tank can be moved to the specified storage position without fail. The operability of the cleaning tank is further improved.

[Operation of dishwasher]
Next, operation | movement of the inversion mechanism 20 when driving a dishwasher is demonstrated, referring FIGS. 5-1 and FIGS. 5-2. 5A and 5B are flowcharts for explaining the operation of the dishwasher.
When the operation of the dishwasher is started, for example, when the power button is turned on, this operation flow starts (step 1 (indicated by S1 in the figure, the same applies to step 2 and the subsequent steps)). First, it is determined whether or not the cleaning tank 2 is in the storage position C based on whether or not the storage position sensor 32 is turned on (step 2). If the cleaning tank 2 is in the storage position C, it waits until the start button is pressed (steps 2 and 3). In the above step 2, if the storage position sensor 32 is off and the cleaning tank 2 is not in the storage position C (if it is pulled forward), the process proceeds to step 4 where the cleaning tank 2 that has been pulled forward is pushed. Until the drawing start position I is reached and the drawing position sensor 33 is turned on.

  If the start button is pressed in step 3 or the retracting position sensor 33 is turned on in step 4, the retracting motor 26 is turned on to rotate the rotating plate 28 and extend the reversing spring 23 (step 5). At this time, it is determined whether or not the reversing spring 23 has been extended based on whether or not the extension position sensor of the pull-in motor position sensor 31 has been turned on (step 6). If the extension position sensor is turned on, the retracting motor 26 is turned off (step 7), and the reversing spring 23 is held in the extended state.

In steps 5 to 7, when the retracting motor 26 is turned on, the reversing spring 23 is extended to apply a clockwise rotation biasing force to the inverter 21. When the cleaning tank 2 is in the storage position C and the start button is pressed, the cleaning tank 2 is held in the storage position C in preparation for the start of the cleaning process (including the rinsing process). On the other hand, when the cleaning tank 2 is moved from the pulled-out state toward the rear storage position C and the pull-in position sensor 33 is turned on, the cleaning tank 2 is pulled into the storage position C, and the cleaning is performed after the cleaning is performed. It serves to hold the tank 2 in its position.
In the next step 8, it is determined whether or not the cleaning tank 2 is in the storage position C based on whether or not the storage position sensor 32 is turned on. If the storage position sensor 32 is on, the process proceeds to the next step 9. If it is not on, an abnormality has occurred in the dishwasher, and abnormality processing is executed (step 10).

In the next step 9, it is determined whether or not the start button has been pressed. If it has been pressed, the process proceeds to the next step 11 to determine whether or not the operation of the dishwasher has been started. If the operation is started in step 11, the process proceeds to the next step 12. If the start button is not pressed in step 9 or if the operation of the dishwasher is not started in step 11, the process proceeds to step 13. In this step 13, it is determined whether or not a predetermined time (for example, 5 minutes) has elapsed after detecting that the cleaning tank 2 is in the storage position C in the above step 8, and if the predetermined time has not elapsed, Return to Step 9.
In these steps 9, 11 and 13, if the operation of the dishwasher is not started without pressing the start button, it waits until a predetermined time elapses after the washing tub 2 reaches the storage position C. If the predetermined time has elapsed, the process proceeds to the next step 14.

  In step 12 above, the process waits until the washing process (including all processes using water such as the washing process and the rinsing process) is completed during the operation of the dishwasher. When this washing process is completed, the process proceeds to the next step 14. move on. In this case, for example, if the operation is a standard course (washing process → rinsing process → drying process), the process proceeds to step 14 when the rinsing process is completed (before the drying process starts). It is also possible to proceed to step 14 after the process is executed and the operation is completed.

In step 14, the pulling motor 26 is turned on to rotate the rotating plate 28 and contract the reversing spring 23. At this time, it is determined whether or not the reversing spring 23 is contracted based on whether or not the contraction position sensor of the pull-in motor position sensor 31 is turned on (step 15). When the extension position sensor is turned on, the retracting motor 26 is turned off (step 16), thereby holding the reversing spring 23 in the contracted state.
In the next step 17, it is determined whether or not the operation of the dishwasher has been executed. If the operation has been executed, the operation flow is ended after waiting for all the operations to be completed (steps 18 and 19). .

If the operation of the dishwasher is not executed in step 17, the process proceeds to step 20. In step 20, it is determined whether or not the start button has been pressed. If it has been pressed, the process returns to step 5 and the operation is continued. If the start button has not been pressed, the process proceeds to the next step 21 where it is determined whether or not the cleaning tank 2 is pulled out of the storage position C and the storage position sensor 32 is turned off. If the storage position sensor 32 is turned off at this time, the operation returns to step 4 and continues. If the cleaning tank 2 is in the storage position C and the storage position sensor 32 is not turned off in step 21, the process proceeds to the next step 22. In step 22, it is determined whether or not a predetermined time (for example, 15 minutes) has elapsed after the reversing spring 23 is contracted in step 16 and the retracting motor 26 is turned off. If the predetermined time has not elapsed, the process returns to step 20, and if the predetermined time has elapsed, the operation flow is terminated (step 23).
In the above steps 20 to 23, if the start button is not pressed and the storage position sensor 32 is not turned off, the operation flow ends after waiting until a predetermined time elapses.

These are the schematic diagrams of the inversion mechanism when the washing tank of the dishwasher by the Example of this invention is pulled out, (a) is a front view, (b) is a side view. These are the typical side views regarding the inversion mechanism of the tableware washing machine by the Example of this invention, (a) shows the drawing start position of a washing tank, (b) shows a storage position. These are block diagrams explaining the control part in the dishwasher by the Example of this invention. These are the schematic diagrams explaining the operating position of the reversing mechanism and the attachment position of the drawing position sensor and the storage position sensor with respect to the movement position of the washing tank in the dishwasher according to the embodiment of the present invention. These are the first half parts of the flowchart explaining operation | movement of the dishwasher by the Example of this invention. These are the second half parts of the flowchart explaining operation | movement of the dishwasher by the Example of this invention. 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 schematic diagrams explaining the principal part of the conventional tableware washing machine, (a) is a longitudinal cross-sectional view when a washing tank exists in a deceleration action position and a storage urging action position, (b) is (a). Plan sectional drawing, (c) is a plane sectional view when the cleaning tank is in the storage position. These are typical longitudinal cross-sectional views explaining operation | movement when pushing in a washing tank toward a storage position in the conventional tableware washing machine, (a) is in the middle of pushing in a washing tank, (b) is a washing tank. It shows when the vehicle is in the deceleration operation position and the storage urging operation position. These are typical longitudinal cross-sectional views explaining operation | movement when pulling out a washing tank from a storage position in the conventional tableware washing machine, (a) is a washing tank in a storage position, (b) is a washing tank. When is in the drawer biasing action position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Washing machine main body 2 ... Cleaning tank 10 ... Cover body 11 ... Packing 12 ... Connecting pin 20 ... Reversing mechanism (center over mechanism) 21 ... Reversing element 21a ... Pin engaging groove 21b ... Spring locking piece 22 ... Pivoting pin DESCRIPTION OF SYMBOLS 23 ... Reversing spring 25 ... Spring biasing force change means 26 ... Retraction motor 27 ... Drive shaft 28 ... Rotating plate 28a ... Spring engaging part 30 ... Motor fixing plate 31 ... Retraction motor position sensor 32 ... Storage position sensor 33 ... Retraction position sensor C: Storage position D ... Pull-out position I ... Pull-in start position

Claims (3)

The main body of the washing machine,
A cleaning tank that can be stored in a storage space of the cleaning machine body and is movable between a storage position and a drawer position;
A reversing mechanism that comprises a reversing element that is rotated in accordance with the movement of the cleaning tank, and a reversing spring that applies a rotating biasing force to the reversing element, and that assists the movement of the cleaning tank;
In a dishwasher consisting of
A dishwasher comprising a pulling motor that changes a mounting position of one end of the reversing spring, thereby changing a rotational biasing force applied to the reversal by the reversing spring. When the cleaning tank is moved toward the storage position and reaches the pull-in start position, or when the cleaning tank is in the storage position and the start button is pressed,
2. The dishwasher according to claim 1, wherein a rotational biasing force applied to the reversing element is increased by driving the pulling motor to extend a reversing spring. When the operation of the washing process in the dishwasher or all the operations are completed, or after the washing tank reaches the storage position, the operation is not started and a predetermined time has elapsed,
3. The dishwasher according to claim 2, wherein a rotational biasing force applied to the inverter is reduced by driving the pulling motor to contract a reversing spring.

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