JP2015019918A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher enabling pulling out a washing tank without causing a situation of jet of wash water when it becomes necessary to pull the washing tank out during washing operation, giving no great impact to a lock mechanism, and excellent in operability and durability.SOLUTION: Finger insertion detection means 109 for detecting finger insertion into a finger insertion part 108 included in a grip part 8 for gripping a washing tank 2 when pulling out the washing tank 2 is provided. When the finger insertion detection means detects, during executing washing operation, a finger insertion state where the fingers are inserted into the finger insertion part, control means 58 gives a command to stop the driving of a pump 59. When rotation speed detection means 59a detects that a rotational speed of a pump is a speed equal to or less than a speed at which cleaning fluid does not leek out from the washing tank, releases the lock of the lock mechanism so as to pull out the washing tank. The finger insertion detection means includes a light emission part and a light receiving part, and detects as a finger insertion state, a state where light of the light emission part is blocked by the fingers inserted into the finger insertion part.

Description

  The present invention relates to a dishwasher, and more specifically, a washing tank can be taken in and out in a substantially horizontal direction through an opening provided in the front surface of the dishwasher main body, and the washing tank is interlocked with taking in and out of the washing tank. The present invention relates to a drawer-type dishwasher in which an upper surface opening for taking in and out of tableware provided in can be opened and closed with an inner lid.

  In general, in a built-in type dishwasher for incorporation into a system kitchen or the like, the washing tub can be slid in and out in a substantially horizontal direction through an opening provided on the front side of the washing machine body. A so-called drawer type is often applied. In this case, the upper surface opening is usually formed in the upper part of the washing tank so that dishes to be washed can be taken in and out, and a door part for opening and closing the opening part on the front side of the washing machine body is provided. Things are used. Furthermore, an inner lid is provided on the inner upper part of the main body of the washing machine so that the inner lid can be raised and lowered. It is configured to stop.

  In such a drawer-type dishwasher, if the user accidentally pulls out the washing tank from the washing machine body during the washing operation, the inner lid rises in conjunction with this, and the upper surface opening of the washing tank Therefore, the cleaning water in the cleaning tank is spouted and scattered from the upper surface opening to the outside.

  Therefore, during the cleaning operation, the cleaning tank is locked so that it cannot be pulled out and stored in the main body of the cleaning machine, and the lock is unlocked so that the cleaning tank can be pulled out of the main body of the cleaning machine when the cleaning operation is not performed. There has been proposed a dishwasher including a lock mechanism to be in a state (see Patent Document 1).

  The tableware washing machine of this patent document 1 allows the drawer to the first drawer position when the washing tank in the predetermined storage position in the washing machine body is to be pulled out during the washing operation, but the first drawer is allowed. Lock mechanism that prevents the cleaning tank from being pulled out beyond the position, and the storage state is detected when the cleaning tank is stored in the predetermined storage position, and the non-storage state is detected when the cleaning tank is pulled out to the first extraction position A cleaning tank position sensor for detecting the rotation speed of the pump, and a rotational speed detecting means for detecting the rotational speed of the pump. When the cleaning tank is in the first drawer position, the inner lid is not separated from the upper surface opening and the cleaning operation is executed. When the cleaning tank is pulled out to the first drawing position and the cleaning tank position sensor detects the non-storage state, the control means sends a stop command to stop the operation of the pump, and the rotational speed detection means The pump is configured so that when it is detected that the rotational speed of the pump is equal to or lower than a predetermined speed at which the cleaning liquid does not leak out of the cleaning tank, the lock by the lock mechanism is released and the pump can be pulled out beyond the first drawing position. Has been.

  In the tableware washing machine of this patent document 1, when the washing tank is in the first drawer position, the inner lid is not separated from the upper surface opening, and the washing tank is pulled out to the first drawer position during the execution of the washing operation. When the cleaning tank position sensor detects that the cleaning tank is in a non-contained state, the control means sends a stop command to stop the operation of the pump, and is rotated by the rotational speed detection means that detects the rotational speed of the pump. When it is detected that the speed is equal to or lower than a predetermined speed at which the cleaning liquid does not leak out of the cleaning tank, the lock by the lock mechanism is released so that the cleaning liquid can be pulled out beyond the first drawing position. When drawing out the washing tank during the washing operation, it is possible to draw out the washing tank quickly without having to stop the washing operation by operating the switch. Able to provide.

  However, in the case of the tableware washing machine of this patent document 1, when pulling out the washing tank in the most rearward storage position to the first drawer position, the user does not recognize that the lock is not released and removes the washing tank. The lock mechanism may be pulled out, and there is a risk of applying a large impact to the lock mechanism depending on how the force is applied when pulling out.

  In the case of the dishwasher of this patent document 1, it is possible to reduce the said impact by making small the drawing-out amount until it draws out the washing tank in the rearmost storage position to the 1st drawer position. However, when trying to reduce the pull-out amount until it is pulled out to the first pull-out position, the cleaning tank in the rearmost storage position is pulled out to the first pull-out position, which is a position slightly pulled out from that position. The cleaning tank position sensor needs to detect that the cleaning tank is in the first drawing position, and the cleaning tank position sensor needs to have high detection accuracy.

  That is, if the amount of drawer until the cleaning tank in the rearmost storage position is pulled out to the first drawer position is small, even when the user pulls out the cleaning tank without recognizing that the lock is not released, Although the cleaning tank pull-out speed does not increase so much until the cleaning tank is pulled out from the rearmost storage position to the first pull-out position, it is possible to reduce the impact applied to the lock mechanism, but the cleaning tank It is not easy to give the position sensor such high detection accuracy, and there is a problem that the cost increases.

JP 2013-90868 A

  The present invention solves the above-mentioned problem, and when it becomes necessary to pull out the cleaning tank during the cleaning operation, the cleaning tank can be pulled out without causing a situation such as ejection of cleaning water, An object of the present invention is to provide a dishwasher that is less likely to give a large impact to the lock mechanism and has excellent operability and durability.

In order to achieve the above object, a dishwasher according to the first aspect of the present invention provides:
A cleaning tank in which dishes to be cleaned are stored, a pump for circulating a cleaning liquid for cleaning dishes, a control means,
A washing machine main body having a front opening through which the washing tank is taken in and out, and performing a washing operation by operating the pump according to an operation command sent from the control means to the pump;
A door that opens and closes the front opening of the cleaner body;
When the cleaning tank is stored up to a predetermined storage position in the main body of the cleaning machine, the upper surface opening for taking in and out of dishes provided in the cleaning tank is sealed, and the cleaning tank is pulled out from the main body of the cleaning machine. An inner lid that opens and closes the upper surface opening in conjunction with taking in and out of the cleaning tank so as to be separated from the upper surface opening of the cleaning tank,
A lock mechanism that prevents the cleaning tank from being pulled out when trying to pull out the cleaning tank in the predetermined storage position in the main body of the cleaning machine during execution of the cleaning operation;
A gripping portion that is disposed on the door and is gripped by a user when pulling out the cleaning tank from the front opening, and includes a finger insertion portion into which the user inserts a finger when gripping When,
Finger insertion detection means for detecting that the finger has been inserted into the finger insertion portion;

A rotational speed detecting means for detecting the rotational speed of the pump;
Comprising
When the finger insertion detection unit detects a finger insertion state in which the finger is inserted into the finger insertion unit during the cleaning operation, the control unit sends a stop command to stop the operation of the pump. ,
When the rotational speed detecting means detects that the rotational speed of the pump is equal to or lower than a predetermined speed at which the cleaning liquid does not leak out of the cleaning tank, the lock mechanism is unlocked, and the cleaning tank is It is configured to be able to be pulled out from the storage position.

  Moreover, in the dishwasher of this invention, it is preferable that the said predetermined speed is set to the maximum value of the rotational speed of the said pump from which a washing | cleaning liquid does not leak out of the said washing tank.

  Further, in the dishwasher of the present invention, the finger insertion detection means includes a light emitting unit and a light receiving unit that receives light emitted from the light emitting unit, and the light emission by the fingers inserted into the finger inserting unit. It is preferable that the finger insertion state is detected by detecting a light blocking state in which light emitted from the unit is blocked.

In the present invention (invention of claim 1), when the cleaning tank is in the storage position, the inner lid is not separated from the opening on the upper surface, and the finger insertion detecting means is placed on the finger insertion portion during the cleaning operation. When the finger insertion state is detected, the control means sends a stop command to stop the pump operation, and the rotation speed is detected by the rotation speed detection means for detecting the rotation speed of the pump. When it is detected that the speed is below the specified speed that does not leak, the lock mechanism is unlocked and the washing tank can be pulled out from the storage position. The washing tank can be quickly pulled out without the need to stop the washing operation by operating the switch.
As a result, it is possible to provide a dishwasher that is less likely to receive a large impact on the lock mechanism and is excellent in operability and durability.

  In the dishwasher according to the present invention, the predetermined speed of the pump rotation speed is set to the maximum value of the pump rotation speed at which the cleaning liquid does not leak out of the cleaning tank. When pulling out the cleaning tank during operation, it is possible to further shorten the time until the cleaning tank can be pulled out while preventing the cleaning liquid from leaking out of the cleaning tank. It becomes possible to provide an excellent dishwasher.

  Further, the finger insertion detection means includes a light emitting unit and a light receiving unit that receives light emitted from the light emitting unit, and detects a light blocking state in which light emitted from the light emitting unit is blocked by a finger inserted into the finger inserting unit. When configured to do so, it is not particularly necessary to perform an operation for switching between a light-shielded state and a non-light-shielded state, so that favorable operability can be realized.

  In addition, since it is only necessary to include a light emitting unit and a light receiving unit that receives light emitted from the light emitting unit, a finger insertion detecting unit capable of reliably detecting insertion of a finger without requiring a large space is provided. Can be configured. As a result, it is possible to provide a small and highly reliable dishwasher.

It is a schematic perspective view which shows the whole structure of the dishwasher concerning embodiment of this invention. It is side surface sectional drawing which shows the case where the washing tank which comprises the dishwasher concerning embodiment of this invention exists in a drawer state. It is a figure explaining operation | movement of the dishwasher concerning embodiment of this invention, Comprising: It is a figure which shows the case where a washing tank exists in a drawer state. It is side surface sectional drawing which shows the case where the washing tank which comprises the dishwasher concerning embodiment of this invention exists in the intermediate state between a drawer | drawing-out state and a storage state. It is a figure explaining operation | movement of the dishwasher concerning embodiment of this invention, Comprising: It is a figure which shows the case where a washing tank exists in the intermediate state of a drawer | drawing-out state and a storage state. It is side surface sectional drawing which shows the case where the washing tank which comprises the dishwasher concerning embodiment of this invention exists in the accommodation state. It is a figure explaining operation | movement of the tableware washing machine concerning embodiment of this invention, Comprising: It is a figure which shows the case where a washing tank exists in the accommodation state. It is a top view which abbreviate | omits one part and shows the accommodation state of the washing tank which comprises the dishwasher concerning embodiment of this invention. It is a top view which shows the accommodation state of the washing tank which comprises the dishwasher concerning embodiment of this invention except an inner cover. It is a perspective view which shows the attachment state to the washing machine main body of the clamp member which comprises the dishwasher concerning embodiment of this invention. It is a top view of the lock mechanism which comprises the dishwasher concerning embodiment of this invention. It is a side view of the lock mechanism which constitutes the dishwasher concerning the embodiment of the present invention, (i) when a washing tub is in a storing state, (b) is a state where a washing tub was pulled out to the 1st drawer position (C) is a diagram showing a case where the locked state is released. It is principal part side sectional drawing which shows the attachment state of the washing tank position sensor which comprises the dishwasher concerning embodiment of this invention. It is a block diagram which shows schematic structure of the operation control system of the dishwasher concerning embodiment of this invention. It is a figure which shows the structure of the finger insertion detection means which comprises the dishwasher concerning embodiment of this invention.

  Hereinafter, the embodiment of the present invention will be shown and the features thereof will be described in more detail.

[Embodiment 1]
1 is a schematic perspective view showing the overall configuration of a dishwasher according to an embodiment of the present invention, FIG. 2 is a side cross-sectional view showing a drawer state of the washing tank, and FIG. 3 is an operation explanatory diagram showing a drawer state of the washing tank, 4 is a side sectional view showing an intermediate state between the drawer state and the storage state of the cleaning tank, FIG. 5 is an operation explanatory diagram showing an intermediate state between the drawer state and the storage state of the cleaning tank, and FIG. 7 is a side sectional view showing the storage state of the tank, FIG. 7 is an operation explanatory view showing the storage state of the cleaning tank, FIG. 8 is a plan view showing a part of the storage state of the cleaning tank, and FIG. It is a top view which shows a state except an inner cover.
The dishwasher of this embodiment is substantially box-shaped, and is provided with a front surface opening 3 for taking in and out the cleaning tank 2 on the front side, and is provided with a main body (main body casing) 1. The above-described cleaning tank 2 is stored in a storage space inside the door in such a manner that it can be taken in and out in a substantially horizontal direction through the front opening 3.
On the upper surface side of the cleaning tank 2, an upper surface opening 4 is provided for taking in and out tableware 5 (FIG. 1) and a cleaning basket 6 (FIG. 6 and the like). Further, an inner lid 10 that opens and closes the upper surface opening 4 of the cleaning tank 2 is disposed in an upper portion inside the cleaning machine main body 1 in a state where the inner lid 10 is held so as to be movable up and down in a substantially vertical direction. Further, in the washing machine main body 1, a pump for circulating a washing liquid for washing dishes is provided in order to perform a washing operation, although not shown.

  In addition, a pair of left and right rails 7 for guiding when the cleaning tank 2 is put in and out is disposed inside the cleaning machine body 1, and the cleaning tank 2 is connected to the cleaning machine body 1 via the pair of left and right rails 7. The storage space is configured to be slidable in the storage movement direction indicated by arrow A and in the drawer movement direction indicated by arrow B.

  The cleaning tank 2 is provided with a door 9 for opening and closing the front opening 3 of the cleaning machine main body 1 on the front side thereof. The door 9 has a gripping part (grip) for gripping when the cleaning tank 2 is pulled out. 8 and an operation panel having an operation / stop switch 57 and the like for the user to perform the cleaning operation and stop the operation. The gripping unit 8 includes a finger insertion unit finger insertion unit 108 through which a user inserts a finger when gripping the gripping unit 8.

  Then, when the user holds the gripping part (grip) 8 and slides the cleaning tank 2 in the moving direction B, the cleaning tank 2 is moved to the front side of the main body 1 as shown in FIG. The tableware 5 and the washing basket 6 can be taken out and stored by being pulled out. In addition, the user can slide the cleaning tank 2 in the storage movement direction A to store the cleaning tank 2 in the cleaning machine main body 1 so that the tableware 5 can be cleaned or dried. It is configured.

  The inner lid 10 is configured to open and close so that the cleaning tank 2 is closed when the cleaning tank 2 is housed in the cleaning machine body 1 and is opened when the cleaning tank is pulled out from the cleaning machine body 1. In the closed state, it is possible to suppress and prevent the washing water from splashing from the washing tub 2 at the time of washing dishes, and in the open state, the tableware 5 and the like can be taken in and out of the washing tub 2. Yes.

  A pair of front and rear cam pins 37 (FIG. 3) functioning as cam followers are provided on the left and right sides of the inner lid 10 so as to protrude outward. Further, between the upper portion of the inner lid 10 and the front end portion of the cleaner main body 1, a lid spring 38 made of a coil spring that biases the inner lid 10 toward the front opening 3 of the cleaner main body 1 is provided. It is intervened.

  Further, at the upper left and right side ends of the inside of the cleaning machine main body 1, as shown in FIG. 10, the pair of front and rear holding tongues 23 individually correspond to the cam pins 37 of the inner lid 10. And are provided integrally. A clamp member 26 is fitted between the pair of front and rear holding tongue pieces 23 so as to be movable in the up-down direction (direction indicated by reference numeral C).

  Each clamp member 26 is made of a molded product made of synthetic resin or metal, and the upper portion thereof has cam grooves 22 into which the above-described cam pins 37 of the inner lid 10 are fitted, and the outer sides of both ends of the cam grooves 22. A holding piece 24 is formed which is positioned and held in contact with the upper edge of each holding tongue piece 23. Further, a receiving surface 35 (FIG. 3A, etc.), which will be described later, of the cleaning tank 2 is in contact with the lower portion of the clamp member 26 so as to restrict the movement of the clamp member 26 in the vertical direction C. A portion 25 is formed.

  As shown in FIG. 3, the cam groove 22 is formed in a substantially V shape symmetrically about the center line L. When the cleaning tank 2 is stored in the cleaning machine main body 1, the cam pin 37 is a cam. When the washing tub 2 is pulled out from the washing machine main body 1 at the lowermost position of the groove 22, the cam pin 37 moves to the uppermost position of the cam groove 22.

  The cleaning tank 2 is formed with flange portions 32 (FIGS. 3 (A) and 5 (A)) projecting outwardly on each side along the outer periphery of the upper surface opening 4, and each of the left and right sides thereof Receiving surfaces 35 (FIGS. 3 (A) and 5 (A)) are formed in a state of projecting downward from the flange portion 32, and the lower edge of each receiving surface 35 is formed on the contact portion 25 of the clamp member 26. Opposite.

  A pair of guide levers 11 (FIGS. 3 and 5) serving as an inner lid opening / closing operation tool are respectively arranged at the upper left and right positions on the inner rear side of the cleaning machine body 1. Each guide lever 11 includes an attachment fixing portion 12 fixed to the washing machine main body 1, a swing support shaft 39, a push lever 13, and a guide pin 14. The proximal end side of the push lever 13 is pivotably mounted about a swinging support shaft 39 provided in the mounting and fixing portion 12, and a cylindrical shape extending in the vertical direction on the distal end side. Guide pins 14 are provided.

  On the other hand, on the left and right sides of the rear end portion of the inner lid 10, elongated holes 16 (FIG. 3A) extending in a direction orthogonal to the moving direction of the cleaning tank 2 are formed. The guide pin 14 at the front end of this is always inserted. As a result, the push lever 13 can swing within a slidable range in which the guide pin 14 slides along the elongated hole 16, and accordingly, the inner lid 10 also falls within the swayable range of the push lever 13. It is configured to move along the front-rear direction (the left-right direction in FIG. 3B). Since the cam pins 37 are fixed to the left and right of the inner lid 10 as described above, the cam pins 37 slide along the cam grooves 22 of the clamp member 26 as the inner lid 10 moves back and forth. .

  Further, as shown in FIG. 9, cleaning tank grooves 15 are provided individually corresponding to the guide levers 11 on the upper left and right of the rear end of the cleaning tank 2. For example, as shown in FIG. 3B, the cleaning tank groove 15 is formed in a state surrounded by a front-side contact portion 17 and a rear-side contact portion 18, The contact portion 17 extends to the side surface of the cleaning tank 2, and the back contact portion 18 is formed so as to recede backward in the middle. And each washing tank groove | channel 15 is comprised so that engagement / disengagement with the guide pin 14 of the front-end | tip of the push lever 13 by rocking | fluctuation of the push lever 13 may be carried out.

In addition, a pair of left and right toggle mechanisms 27 for assisting the moving force when the cleaning tank 2 is moved in the storage movement direction and the drawer movement direction are provided at a rear portion in the cleaning machine main body 1.
Each toggle mechanism 27 is provided with an engaging pin 36 at the rear end portion of the cleaning tank 2, while a substantially L-shaped lever 29 is rocked by a pivot pin 31 at the rear end portion of the cleaning machine body 1. An engagement notch 28 that engages with the engagement pin 36 is formed on one end side of the lever 29 that sandwiches the pivot pin 31, and the other end has one end on the cleaning machine body 1. The other end of the fixed coil spring 30 (FIGS. 3 (A) and 5 (A)) is attached. As a result, the biasing force (rotation direction) of the coil spring 30 with respect to the lever 29 is configured to switch between the clockwise direction and the counterclockwise direction at the setting switching position D shown in FIG. .

  Moreover, in the dishwasher concerning this embodiment, the lock mechanism 40 is provided in the rear part side in the washing machine main body 1. FIG. The lock mechanism 40 has a function of preventing the cleaning tank from being pulled out when the cleaning tank 2 in a predetermined storage position in the cleaning machine body 1 is pulled out during the cleaning operation, and the cleaning operation is performed. If not, or when the amount of cleaning liquid ejected from the pump 59 is such that the cleaning liquid is not ejected from the cleaning tank 2 to the outside, the cleaning tank 2 is removed from the cleaning machine body 1. It is comprised so that the function which accept | permits drawing out can be fulfill | performed.

  In the case of this embodiment, the lock mechanism 40 is, as shown in FIGS. 11 and 12 (A), (B), (C), specifically, as a locked portion at the rear end of the cleaning tank 2. The strike pin 41 is disposed, and the cleaning tank 2 stored in a predetermined storage position of the cleaning machine main body 1 (in this embodiment, the innermost position of the cleaning machine main body 1) is pulled out to the first extraction position. Sometimes, a hook 42 as a locking member for locking the strike pin 41, a torsion spring 43 as a locking biasing means for biasing the hook 42 toward the locking position of the strike pin 41, and this torsion A cam 44 as an unlocking drive means for operating the hook 42 from the position of engagement with the strike pin 41 to the position of non-engagement, that is, the position disengaged from the strike pin 41 against the urging force of the spring 43. By arranging each one, It is. The cam shaft 48 of the cam 44 is connected to a cam drive motor (not shown) that drives the cam 44 to rotate.

  Incidentally, since a gap as play is provided between the strike pin 41 and the hook 42 in the predetermined storage position of the cleaning machine body 1, the cleaning tank 2 is moved from the rearmost storage position to the strike pin 41. The cleaning tank 2 can be pulled out only to the first drawing position where the hook 42 comes into contact, that is, the dimension corresponding to the gap as the play.

FIG. 12 (a) shows the positional relationship between the strike pin 41 and the hook 42 when the cleaning tank 2 is located on the innermost side of the cleaning machine main body 1 (in the predetermined storage position). FIG. 12B shows a state in which the strike pin 41 and the hook 42 are engaged when the cleaning tank 2 is pulled out to the first pull-out position.
FIG. 12C shows a state in which the hook 42 is held in the non-locking position where it is detached from the strike pin 41 (that is, the lock by the lock mechanism 40 is released, and the washing tank 2 can be freely taken in and out. Possible state).

  Moreover, in the dishwasher of this embodiment, when the washing tank 2 is pushed into the innermost side of the washing machine body 1 and is in a predetermined storage position, the distance G between the strike pin 41 and the hook 42 is 3 mm ( 12 (a)), the state where the cleaning tank 2 is pulled out 3 mm from the predetermined storage position and the hook 42 is in contact with the strike pin 41 is the state where the cleaning tank 2 is pulled out to the first pull-out position ( The state is as shown in FIG.

  As can be understood from the above description, the cleaning tank 2 is pushed into the innermost side of the cleaning machine main body 1 in which the strike pin 41 and the hook 42 have the positional relationship shown in FIG. From the position to the position immediately before the cleaning tank 2 is pulled out to the first drawing position (immediately before the strike pin 41 and the hook 42 are in the positional relationship shown in FIG. 12 (b)). An area | region will be in the state which has the washing tank 2 in this invention in a predetermined accommodation position.

  Further, the hook 42 is swingably supported by a support shaft 45 fixed to the cleaning machine main body 1, and is directed toward a position where the strike pin 41 is locked by a torsion spring 43 wound around the support shaft 45. It is biased (biased clockwise in FIG. 12). Further, the hook 42 is formed with an inclined portion 46 at a tip portion facing the strike pin 41. The inclined portion 46 smoothly moves the hook 42 to the non-locking position against the urging force of the torsion spring 43 due to the strike pin 41 coming into contact when the drawn washing tank 2 is pushed to a predetermined position. It acts to move. When the cleaning tank 3 returns from the first drawing position to the back side (predetermined storage position), the strike pin 41 is again locked by the hook 42.

Further, as shown in FIG. 11, the hook position as a locking member position sensor for detecting whether the hook 42 is in the locking position or the non-locking position in the vicinity of the light shielding member 47 of the hook 42. A sensor 50 is provided. The hook position sensor 50 is composed of, for example, a photocoupler in which a light projecting unit 50a and a light receiving unit 50b are arranged to face each other.
Further, a light shielding member 47 protrudes at a position on the opposite side across the inclined portion 46 and the support shaft 45 of the hook 42. In the configuration of this embodiment, as shown in FIG. 12A, when the light blocking member 47 of the hook 42 is interposed between the light projecting unit 50a and the light receiving unit 50b, the output of the light receiving unit 50b is turned off. It is detected that the hook 42 is in the locked position. Further, as shown in FIG. 12C, when the light shielding member 47 is detached from between the light projecting unit 50a and the light receiving unit 50b, the output of the light receiving unit 50b is turned on, and the hook 42 is in the non-locking position. It is detected.

  Further, as shown in FIGS. 13A and 13B, a mounting plate 52 is provided at the rear end of the cleaning tank 2, and a cleaning tank position sensor 53 is fixed to the mounting plate 52. A lever 54 is swingably attached in the vicinity of the tank position sensor 53. Further, a protrusion 56 for pressing the lever is formed on the mounting plate 55 of the rail 7 of the cleaning machine body 1 at a position facing the lever 54.

  The cleaning tank position sensor 53 detects whether or not the cleaning tank 2 is at a predetermined storage position. Like the hook position sensor 50 described above, for example, a light projecting unit 53a and a light receiving unit 53b are arranged to face each other. Photocoupler. Then, as shown in FIG. 13 (a), when the lever 54 is separated from the projection 55 and is positioned between the light projecting portion 53a and the light receiving portion 53b, the output of the light receiving portion 53b is turned off. It is detected that the tank 2 is pulled forward from the predetermined storage position, that is, that the cleaning tank 2 is pulled out to the first drawer part or a position outside the first drawer part, as shown in FIG. As shown in the figure, when the lever 54 is pressed by the projection 55 and separated from between the light projecting portion 53a and the light receiving portion 53b, the output of the light receiving portion 53b is turned on, so that the cleaning tank 2 is stored in a predetermined storage position. Is configured to be detected.

  And the dishwasher of this embodiment detects this, when a user's finger is inserted in the finger insertion part 108 of the holding part 8 hold | gripped when pulling out the washing tank 2, as shown in FIG. Finger insertion detecting means 109 is provided.

  As shown in FIG. 15, the finger insertion detection means 109 includes, for example, a light emitting unit 101 made of, for example, an LED, a phototransistor that receives light emitted from the light emitting unit 101, and the like. And a light receiving unit 102, and is configured to detect a finger insertion state by detecting a light blocking state in which light from the light emitting unit 101 is blocked by a finger inserted into the finger insertion unit 108. Yes.

  FIG. 14 is a block diagram showing a schematic configuration of the operation control system of the dishwasher of this embodiment.

The controller 58 as a control means is composed of, for example, a microcomputer. By installing a predetermined control program, an operation signal from the operation / stop switch 57, and the hook position sensor 50 and the washing tank position sensor 53 are used. Based on this detection signal, the pump 59 for circulating the cleaning liquid and the operation of the cam drive motor 60 for driving the cam 44 are controlled. The tableware washing machine of this embodiment further includes a rotation speed detection means 59a for detecting the rotation speed of the pump 59. The rotation speed detection means 59a uses the rotation speed of the pump 59 as a cleaning liquid. The controller 58 is configured to send a signal that allows the cleaning tank 2 to be pulled out from the cleaning machine main body 1 when a speed at which the cleaning tank 2 is not ejected is detected.
The control operation by the controller 58 will be described in detail below.

Next, operation | movement of the dishwasher provided with the said structure is demonstrated.
(1) Opening / Closing Operation of Inner Lid 10 Accompanying Storage and Drawer Movement of Washing Tank 2 When the washing tank 2 is pulled out from the washing machine main body 1, as shown in FIG. Since the guide pins 14 are detached from the cleaning tank groove 15 and the inner lid 10 is pulled by the lid spring 38 toward the front opening side of the cleaner body 1, each guide pin 14 is a long hole in the inner lid 10. 16 is located at a position on the outer end side (hereinafter referred to as a drawer operation position). For this reason, the cam pin 37 of the inner lid 10 has moved to the uppermost position of the cam groove 22 of the clamp member 26, and the inner lid 10 has been lifted away from the upper surface opening 4 of the cleaning tank 2.

  If the cleaning tank 2 is gradually moved in the storage movement direction A from this state, the cleaning tank groove 15 remains on the guide pin 14 until the cleaning tank 2 reaches the intermediate position shown in FIGS. 4 and 5. Since they are not engaged, the guide pin 14 is held in the pull-out operation position.

  When the cleaning tank 2 reaches the intermediate position shown in FIGS. 4 and 5, the near-side contact portion 17 of the cleaning tank 2 contacts the guide pin 14 as shown in FIG. When the cleaning tank 2 is further moved in the storage movement direction A, the guide pin 14 is pressed by the near-side contact portion 17 of the cleaning tank 2, so that the guide pin 14 moves inward along the elongated hole 16 of the inner lid 10. And slides into the cleaning tank groove 15. As a result, the push lever 13 rotates counterclockwise in the figure. By rotating the push lever 13, the inner lid 10 is pushed and moved in the storage movement direction A against the pulling force of the lid spring 38. Therefore, the cam pin 37 of the inner lid 10 moves from the uppermost position of the cam groove 22 of the clamp member 26 toward the lowermost position, and as a result, the inner lid 10 descends toward the upper surface opening 4 of the cleaning tank 2. .

  When the cleaning tank 2 is moved to a predetermined storage position, as shown in FIG. 7B, each guide pin 14 is positioned on the inner end side in the elongated hole 16 of the inner lid 10 (hereinafter referred to as a storage operation position). Migrate to Along with this, the cam pin 37 of the inner lid 10 moves to the lowest position of the cam groove 22 of the clamp member 26, and as a result, the contact portion 25 of each clamp member 26 contacts the receiving surface 35 of the cleaning tank 2. The clamp member 26 is prevented from moving in the opening / closing direction C, and the inner lid 10 is pressed against the cleaning tank 2 so that the upper surface opening 4 of the cleaning tank 2 is reliably sealed.

On the other hand, when the cleaning tank 2 is moved further outward from the first drawing position (moved in the drawing movement direction B (see FIG. 6)), the operation is the reverse of the above description. That is, the pressing action on the guide pin 14 by the front side abutting portion 17 of the cleaning tank 2 is released, and the pulling force of the lid spring 38 is applied to the inner lid 10. The cam pin 37 of the inner lid 10 moves from the lowermost position to the uppermost position of the cam groove 22 of the clamp member 26 while sliding along the elongated hole 16 from the storing operation position toward the pulling operation position. As a result, the inner lid 10 is separated from the upper opening of the cleaning tank 2 and is opened.
However, when the cleaning tank 2 is in the first drawer position, the inner lid 10 is pressed against the cleaning tank 2 so that the upper surface opening 4 of the cleaning tank 2 is securely sealed. It is configured.

  As described above, when the cleaning tank 2 is moved and retracted, the inner lid 10 is interlocked by the interaction of the guide lever 11, the cam groove 22 of the clamp member 26, and the lid spring 38 according to this movement. The opening / closing operation is performed.

(2) Operation of the toggle mechanism 27 in accordance with the storage movement and the drawer movement of the cleaning tank 2 In the state where the cleaning tank 2 is stored in the storage space of the main body 1 of the cleaning machine, as shown in FIGS. The engaging pin 36 protruding rearward from the tank 2 is fitted into the engaging notch 28 of the lever 29, and the rotational force of the lever 29 caused by the urging force of the coil spring 30 causes the cleaning movement of the cleaning tank 2. Acts on the direction A side.

  At this time, as described above, the front contact portion 17 of the cleaning tank 2 contacts the guide pin 14 and presses it toward the storage movement direction A side, so that the cam pin 37 of the inner lid 10 is connected to the cam groove 22. The inner lid 10 is in a state of sealing the upper surface opening 4 of the cleaning tank 2 as a result.

  When it is detected that the rotational speed of the pump 59 is equal to or lower than the predetermined speed and the lock is released, the cleaning tank 2 is moved to the drawing movement direction B side beyond the first drawing position. When the lever 29 is rotated in the pulling movement direction B side against the urging force of the coil spring 30 and the lever 29 exceeds the setting switching position D shown in FIG. 5 (a), FIG. 3 (a) and FIG. As shown, the turning force of the lever 29 caused by the urging force of the coil spring 30 is switched so as to act on the pulling movement direction B side. As a result, the urging force of the coil spring 30 pushes the cleaning tank 2 in the pulling movement direction B side, and then the engaging pin 36 is removed from the engaging notch 28 and the inner lid 10 is raised as described above. Since the closing of the upper surface opening 4 of the cleaning tank 2 is released, the cleaning tank 2 can be pulled out from the cleaning machine main body 1.

  When the washing tub 2 is pushed back in the storage movement direction A side from this pulled out state, the engaging pin 36 protruding from the washing tub 2 is inserted into the engaging notch 28 of the lever 29 and presses it. On the contrary, the lever 29 is rotated in the storage movement direction A side against the urging force of the coil spring 30. When the lever 29 exceeds the setting switching position D, the turning force of the lever 29 is switched so as to act on the storage movement direction A side, so that the cleaning tank 2 is moved to the storage movement direction A side by the urging force of the coil spring 30. Be drawn.

  As described above, the energizing force (rotating action direction) of the coil spring 30 against the lever 29 of the toggle mechanism 27 is moved clockwise and counterclockwise with the setting switching position D as a boundary as the cleaning tank 2 is moved in and out. Thus, the cleaning tank 2 can be moved and retracted with a small operating force.

(3) Control operation by the controller 58 when the dishwasher is operated / stopped In the present invention, when it becomes necessary to draw out the washing tank 2 during the washing operation, the washing tank 2 can be drawn out. By shortening the time to become, the operability is improved. Here, the control operation by the controller accompanying the operation / stop of the dishwasher according to this embodiment will be described including the characteristic part of the present invention.

  In the standby state before the start of the cleaning operation or after the cleaning operation, the controller 58 drives the cam drive motor 60 to rotate the cam 44 so that the hook 42 is moved to the non-locking position where it is detached from the strike pin 41 of the cleaning tank 2. Hold (state shown in FIG. 12C). That is, in the standby state, the washing tank 2 is unlocked by the lock mechanism 40, so that the washing tank 2 can be freely taken in and out, and tableware can be taken in and out freely.

  When the operation / stop switch 57 is operated and a cleaning operation is commanded, the controller 58 first determines whether or not the detection output of the cleaning tank position sensor 53 is on. If the cleaning tank position sensor 53 is on, it is considered that the cleaning tank 2 has been stored in the predetermined storage position, so the cam drive motor 60 is activated. As a result, the cam 44 is rotated and the hook 42 is moved to the locking position, so that the strike pin 41 of the cleaning tank 2 is locked by the hook 42 (the state shown in FIG. 12A). At that time, the controller 58 determines whether or not the hook position sensor 50 is turned off. If the hook position sensor 50 is turned off, it is considered that the strike pin 41 of the cleaning tank 2 is securely locked by the hook 42, so that the controller 58 activates the pump 59 for the first time at this time. Accordingly, the cleaning operation is started, and the cleaning water pressurized by the pump 59 is sprayed on the dishes 5 to perform cleaning.

  During the cleaning operation, the hook 42 securely holds the strike pin 41 by the action of the torsion spring 43, so that the state where the cleaning tank 2 is locked in the predetermined storage position is stably maintained. Therefore, even when the user carelessly pulls the cleaning tank 2 carelessly, it is possible to reliably prevent the occurrence of the problem that the cleaning tank 2 is pulled out.

  During this cleaning operation, when it is necessary to stop the cleaning and pull out the cleaning tank 2, the user tries to grip the grip 8 provided in the door 9, and the finger insertion part of the grip 8 When a finger is inserted into 108, the light (shown by three arrows in the figure) emitted from the light emitting unit 101 and reaching the light receiving unit 102 is inserted into the finger inserting unit 108 as shown in FIG. The light is blocked by a finger and does not reach the light receiving unit 102. The finger insertion detection means 109 detects this light shielding state (finger insertion state).

  Thus, when the finger insertion detecting means 109 detects that the user's finger has been inserted into the finger insertion portion 108 of the gripping portion 8 in order to pull out the cleaning tank 2 and has become a light-shielded state (finger insertion state), A message (that is, a finger insertion state) is input to the controller 58. (See FIG. 14.)

  When it is input to the controller 58 that the finger is in the inserted state, the controller (control means) 58 sends a stop command for stopping the operation of the pump 59. (See FIG. 14.)

  The controller 58 drives the cam drive motor 60 when the rotation speed detecting means 59a detects that the rotation speed of the pump 59 has reached a speed at which the cleaning liquid does not spout outside the cleaning tank 2. Then, the cam 44 is actuated, and the hook 42 is rotated against the urging force of the torsion spring 43 and moved to the non-locking position where it is detached from the strike pin 41 (see FIG. 12 (c)). Thereby, the lock | rock with respect to the washing tank 2 by the lock mechanism 40 is cancelled | released, and the washing tank 2 can now freely take in and out.

  Further, when the predetermined cleaning time has elapsed and the cleaning operation is completed and the process shifts to the standby state, the controller 58 first stops the pump 59 accordingly, and then drives the cam drive motor 60 to move the cam 44. The hook 42 is rotated against the urging force of the torsion spring 43 and moved to the non-locking position where the hook 42 is detached from the strike pin 41. Thereby, since the lock | rock by the lock mechanism 40 is again cancelled | released, the washing tank 2 can be taken in and out freely.

  When the strike pin 41 is locked by the hook 42 and the cleaning tank 2 is locked, the hook 42 is only urged to the locking position by the torsion spring 43 and is not restricted by the cam 44. Therefore, even when the cam drive motor 60 does not operate due to a power failure or an emergency failure, the cleaning tank 2 can be unlocked by releasing the strike pin 41 by applying an external force to the hook 42. .

  Then, after the washing tank 2 is unlocked and the tableware is taken out after the washing tank 2 is unlocked, the washing tank 2 is brought to a predetermined storage position in the washing machine main body 1 even if power recovery from a power failure or failure remains unrepaired. When the strike pin 41 is moved, the strike pin 41 contacts and presses against the inclined portion 46 at the tip of the hook 42, so that the hook 42 swings to the unlocked position against the biasing force of the torsion spring 43, and the washing tank Is stored in the storage position, the strike pin 41 is again engaged with the hook 42. For this reason, the washing tank 2 can be pushed into a predetermined storage position.

  Accordingly, it is possible to avoid a situation in which the cleaning tank 2 that has been pulled out is in the way of being obstructed or left unsightly while the cleaning tank 2 is pulled out. In addition, when the cleaning tank 2 is stored, no excessive stress is generated even if the strike pin (locked portion) 41 and the hook (locking member) come into contact with each other. It is possible to reliably prevent the occurrence of failures such as breakage and deformation of 40.

  In the dishwasher according to the above-described embodiment, the lock mechanism 40 includes a strike pin 41 provided in the washing tub 2 and a hook 42 provided in the washing machine body 1 so that sufficient reliability can be obtained. However, the configuration of the lock mechanism is not limited to this. For example, a strike pin provided in the washing tank and operated by a solenoid is engaged with an engagement portion such as an engagement hole provided in the washing machine body. It is also possible to adopt other configurations such as a configuration for separation.

  Moreover, although the example provided with the toggle mechanism 27 was shown in the dishwasher of the said embodiment, this toggle mechanism 27 is not essential, and it can also be set as the structure which abbreviate | omitted the toggle mechanism 27. FIG.

  Moreover, in the said embodiment, although the lock mechanism 40 is provided in the rear-end part side in the washing machine main body 1, the position of the lock mechanism 40 does not necessarily need to be provided in the rear-end part side in the washing machine main body 1, Any region other than the door 9 that opens and closes the front opening 3 of the cleaning machine main body 1 can be disposed at any location.

  The present invention is not limited to the above embodiment in other points, and various applications and modifications can be made within the scope of the invention.

1 Main body of cleaning machine (main body casing)
DESCRIPTION OF SYMBOLS 2 Washing tank 3 Front opening part 4 Upper surface opening part 9 Door part 10 Inner lid 40 Lock mechanism 41 Strike pin (locked part)
42 Hook (locking member)
43 Torsion spring (engagement means for locking)
44 Cam (Driving release drive means)
46 inclined part 50 hook position sensor (locking member position sensor)
53 Cleaning tank position sensor 57 Run / stop switch 58 Controller (control means)
59 Pump 59a Rotational speed detection means 60 Cam drive motor 101 Light emitting part 102 Light receiving part 108 Finger insertion part 109 Finger insertion detection means

Claims (3)

A cleaning tank in which dishes to be cleaned are stored, a pump for circulating a cleaning liquid for cleaning dishes, a control means,
A washing machine main body having a front opening through which the washing tank is taken in and out, and performing a washing operation by operating the pump according to an operation command sent from the control means to the pump;
A door that opens and closes the front opening of the cleaner body;
When the cleaning tank is stored up to a predetermined storage position in the main body of the cleaning machine, the upper surface opening for taking in and out of dishes provided in the cleaning tank is sealed, and the cleaning tank is pulled out from the main body of the cleaning machine. An inner lid that opens and closes the upper surface opening in conjunction with taking in and out of the cleaning tank so as to be separated from the upper surface opening of the cleaning tank,
A lock mechanism that prevents the cleaning tank from being pulled out when trying to pull out the cleaning tank in the predetermined storage position in the main body of the cleaning machine during execution of the cleaning operation;
A gripping portion that is disposed on the door and is gripped by a user when pulling out the cleaning tank from the front opening, and includes a finger insertion portion into which the user inserts a finger when gripping When,
Finger insertion detection means for detecting that the finger has been inserted into the finger insertion portion;
A rotational speed detecting means for detecting the rotational speed of the pump;
Comprising
When the finger insertion detection unit detects a finger insertion state in which the finger is inserted into the finger insertion unit during the cleaning operation, the control unit sends a stop command to stop the operation of the pump. ,
When the rotational speed detecting means detects that the rotational speed of the pump is equal to or lower than a predetermined speed at which the cleaning liquid does not leak out of the cleaning tank, the lock mechanism is unlocked, and the cleaning tank is A dishwasher configured to be able to be pulled out from the storage position.   The dishwasher according to claim 1, wherein the predetermined speed is set to a maximum value of a rotation speed of the pump so that the cleaning liquid does not leak out of the cleaning tank.   The finger insertion detection unit includes a light emitting unit and a light receiving unit that receives light emitted from the light emitting unit, and the light emitted from the light emitting unit is shielded by a finger inserted into the finger inserting unit. The dish washing machine according to claim 1 or 2, wherein the finger insertion state is detected by detecting a finger.

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