JP2007325810A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner cover opening/closing mechanism which is reliable on a sealing function without depending on forming or processing error of an outer box and without rubbing of a packing, and which does not require a latch mechanism which keeps the housing state of a washing tub. <P>SOLUTION: This dishwasher includes: a support member 6 provided at a side wall part of the outer box 3 and supporting a linking mechanism 5 in the direction of gravity when the washing tub 2 is drawn out; a guide part 3 provided along the side surface of the washing tub and keeping the linking mechanism in an opening and closing direction of an inner cover 4 by transition of the linking mechanism from the support member in a process of housing the washing tub in the outer box 3; and a switching biasing means 7 engaged to the linking mechanism to open or close the inner cover linked with putting in/out of the washing tub. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwasher that can be preferably used in a built-in type drawer type dishwasher and the like incorporated in a system kitchen and the like. Related to the machine.

  The drawer-type dishwasher, which is popular due to the design of the system kitchen, is composed of a washing tub with an upper opening and an outer box with an opening at the front, and the washing tub moves smoothly in the front-rear direction. It is supported by guide rails provided on the left and right sides of the box and the cleaning tank. When the cleaning tank is stored in the outer box, the inner lid installed inside the outer box interlocks the opening of the cleaning tank, and the packing installed in the lower part of the inner lid fits into the cleaning tank. In addition, it adheres and prevents outflow of water during cleaning and steam during drying. Specifically, the outer box and the inner lid form a four-bar link, the outer box and the inner lid are connected by a tension spring, and the abutting portion that protrudes below the rear portion of the inner lid is the rear end of the cleaning tank. By pushing in, the inner lid is moved in a substantially circular arc to open and close the inner lid.

  In the opening / closing mechanism of the inner lid, the cleaning tank is relatively unshifted by the guide rails, but the inner lid link mechanism has a rotating part, and thus blurring occurs. There is a need for an inner lid opening / closing mechanism that can prevent a shake with the lid and realize a reliable seal. In order to satisfy such a requirement, the 4-rod link has a contact portion that comes into contact with the cleaning tank from a substantially downward direction, and the hole with respect to the link rotation shaft is formed into a substantially vertical slot. The method of causing the inner lid to follow the vertical displacement of the tank (for example, Patent Document 1), or by making the hole with respect to the link rotation shaft a long hole in the substantially horizontal direction, the direction of drawing out and storing the cleaning tank (hereinafter referred to as front and rear) A method of causing the inner lid to follow a displacement with respect to the direction (for example, Patent Document 2), and a 4-bar link having a contact portion that comes into contact with the cleaning tank from a substantially downward direction, and the contact of the cleaning tank A method of making the inner lid follow the vertical displacement of the cleaning tank by forming a surface with a slope part and a horizontal part, realizing a closing operation at the slope part, and maintaining a closed state at the horizontal part (for example, patent Reference 3).

JP 2002-143072 (page 4, FIG. 2) JP 2003-000518 A (page 4, FIG. 2) Japanese Patent Laid-Open No. 2002-165744 (pages 4-5, FIG. 4)

  In the inner lid opening / closing mechanism in which the hole portion with respect to the link rotation shaft in Patent Document 1 is an elongated hole in a substantially vertical direction, the rotation shaft is fixed to the outer box, and therefore the rotation shaft is displaced with respect to the front-rear direction of the cleaning tank. If so, the link member is also installed at a shifted position. Due to this displacement, the link member is displaced from the desired posture, the relative position of the inner lid and the cleaning tank in the height direction changes, and a desired packing crushing margin cannot be ensured. When the rotation shaft is in front of the desired position, the inner lid is further down, that is, the packing is further crushed, and the operating force during the storage operation of the cleaning tank is increased. On the other hand, when the rotating shaft is behind the desired position, the packing crushing cost is insufficient and a sufficient sealing function cannot be exhibited. Thus, in order to secure a desired packing crushing cost, it is necessary to improve the installation accuracy in the front-rear direction of the rotating shaft. In addition, against the inner lid holding urging body in the withdrawn state, the washing tank tries to come out in the withdrawal direction to hold the inner lid downward during storage, so the washing tank can be kept in the stored state. A latch mechanism is required.

Even in the case of the elongated hole in the substantially horizontal direction of Patent Document 2, since the rotation shaft is fixed to the outer box, it cannot cope with the vertical displacement, and the link member deviates from a desired posture. In this case, it is possible to reduce the influence of displacement by ensuring a large length in the front-rear direction between the rotating shaft fixed to the outer box and the rotating shaft on the inner lid side. Affects teenagers.
In the case where the abutting surface of the cleaning tank of Patent Document 3 is composed of a slope portion and a horizontal portion, the hole portion with respect to the rotating shaft fixed to the outer box is not a long hole. As a result, the height of the link member and the positional deviation with respect to the front-rear direction can only be allowed, and it is necessary to improve the installation accuracy of the rotary shaft in the up-down direction and the front-rear direction. Furthermore, when the inner lid is closed, the inner lid operates from the inclined contact portion of the cleaning tank to the horizontal contact portion, and therefore, the relative movement between the cleaning tank and the inner lid includes a longitudinal component. That is, since the packing and the cleaning tank installed on the lower inner side of the inner lid are rubbed in the front-rear direction, not only the operation force due to the packing friction force during storage is increased, but also the packing material is easily worn.

  This invention was made to solve the problems of the prior art as described above, does not depend on molding / processing errors of the outer box, has no packing rubbing, has high reliability for the sealing function, It is an object of the present invention to provide a dishwasher that can eliminate or simplify the latch mechanism for maintaining the storage state of the washing tank.

  In the dishwasher according to the present invention, the shaft portion of the link mechanism is separated from the outer box, and a support member is provided that supports the link mechanism in the direction of gravity when the washing tank is pulled out on the side wall of the outer box. The guide mechanism, which is provided along the side surface of the cleaning tank and moves in the gravitational direction together with the inner lid by moving the link mechanism from the support member in the process of accommodating the cleaning tank in the outer box, is engaged with the link mechanism. And switching urging means for opening or closing the inner lid in conjunction with the insertion and removal of the cleaning tank.

  In this invention, the shaft portion of the link mechanism for opening and closing the inner lid is separated from the outer box, and the outer box is provided with a support member that simply supports the link mechanism in the direction of gravity, so that the outer box has high molding and processing accuracy. It becomes unnecessary. Further, with respect to the opening / closing direction of the inner lid, a position shift in the opening / closing direction can be absorbed by supporting the link mechanism in the opening / closing direction by a guide portion provided on the side surface of the cleaning tank. Then, the switching urging means is engaged with the link mechanism, and the opening / closing operation is performed via the link mechanism, so that the positional deviation can be absorbed. Further, since the switching urging means operates the link mechanism in conjunction with the insertion and removal of the cleaning tank, the inner lid can be operated only in the opening / closing direction relative to the cleaning tank, so that there is no rubbing of the packing and is high. It is easy to ensure reliability. Further, the force for pulling out the cleaning tank in the housed state is small, and the latch mechanism can be made unnecessary or simple.

Embodiment 1 FIG.
FIGS. 1-8 demonstrates the tableware washing machine by Embodiment 1 of this invention, FIG. 1 is side sectional drawing which shows notionally the principal part structure of the state by which the washing tank was pulled out forward, FIG. FIG. 3 is a side cross-sectional view showing the configuration of the main part in a state where the cleaning tank is housed in the outer box, and FIG. 4 is a guide unit provided in the cleaning tank and a changeover of the link mechanism shown in FIG. It is side surface sectional drawing shown by the relationship with a biasing means. 5 to 8 are diagrams for explaining the structure and operation in detail. Note that the same reference numerals denote the same or corresponding parts throughout the drawings.

  The dishwasher 1 is composed of a washing tub 2 having an opening 2a on the upper side and an outer box 3 with the front (left side in the figure) opened, and the washing tub 2 is on both the left and right sides of the washing tub 2 and the outer box 3. Along the installed guide rail 11, it is configured to be able to move smoothly and freely in the front-rear direction (left-right direction in the figure). The cleaning tank 2 is provided with at least one rotary cleaning nozzle 12 having a plurality of injection ports 12a on its inner bottom and a leftover filter 13. A cleaning pump head 14, a drainage pump head 15, and an electric motor 16 that drives these are provided at the lower part of the cleaning tank 2. In addition, an inner lid 4 for closing the opening 2a is disposed on the upper inner side of the outer box 3. Further, a packing 41 is provided on the lower surface of the inner lid 4 so as to be in close contact with the opening 2a of the cleaning tank 2 when the inner lid 4 is closed. An abutting portion 4a projecting downward is provided so that the inner lid thrusting portion 2b provided at the end abuts.

  The link mechanism 5 for opening and closing the inner lid 4 has two shaft portions 51 provided on the side end portion of the inner lid 4 so as to be separated from each other in the front-rear direction, and an upper portion pivotably attached to the shaft portion 51. A pair of link members 53 (first link member 53A, second link member 53B) having a pivot shaft 52 in the lower portion, and lower portions of the pair of link members 53 pivotally attached to the pivot shaft 52 and disposed in the front-rear direction. It is composed of a four-bar link mechanism which is constituted by a link connecting member 54 which is connected to each other and forms a quadrangle with the inner lid 4 and a pair of link members 53. Note that the link member 53 whose upper portion is supported by the shaft portion 51 of the inner lid 4 has a stopper (not shown) that the lower pivot shaft 52 side rotates counterclockwise from the position of FIG. In the clockwise direction, a locking mechanism using, for example, an elastic claw (not shown) is configured so that it can freely rotate when a predetermined torque is exceeded. Posture is maintained.

  A sliding roller 55 is rotatably provided on each pivot 52, and each sliding roller 55 is in a state where the cleaning tank 2 is pulled out from the outer box 3, as shown in FIG. The two support members 6 each having a substantially block-shaped rectangular parallelepiped provided in the outer box 3 are held in the direction of gravity by the support portions formed by the upper end surfaces. The support member 6 protrudes from the side surface portion of the outer box 3 so as to be rotatable, and is cut and raised by the counterclockwise torque in the state shown in FIG. It is pressed against the formed stopper 32. And as shown in FIG. 4, the guide part 23 which consists of the guide groove 21 and the protrusion part 22 adjacent to the lower part in the predetermined part of the right-and-left both sides of the washing tank 2 on the side surface of the washing tank 2 in the front-back direction. Are formed along. The rear end of the protrusion 22 is an abutting slope 22a that abuts on the upper part of the support member 6 when the cleaning tank 2 is accommodated and rotates the support member 6 in the clockwise direction. Further, switching urging means 7 for opening and closing the inner lid 4 is installed in the rear part of the right and left side surfaces of the cleaning tank 2.

  The switching urging means 7 includes a support shaft 71 provided at a predetermined portion of the protrusion 22 of the cleaning tank 2, and an engagement provided rotatably on the support shaft 71 and protruding from the second link member 53B. A rotating body 73 having an operating lever portion 72 formed with an engaging recess 72 a for engaging with the pin 56 and opening and closing the inner lid 4 via the link member 53, and one end portion of the rotating body 73 are predetermined. A toggle mechanism 75 using a biasing spring 74 made of a tension spring that is locked to a predetermined portion and locked to a predetermined portion of the protruding portion 22 of the cleaning tank 2, and protrudes inside the side surface portion of the outer box 3. In the first direction in which the cleaning tank 2 is engaged with the link member 53 in the process of being accommodated in the outer box 3 and the urging spring 74 urges the inner lid 4 to close via the link member 53. The first abutting member 31 for rotating the rotating body 73 and the inside of the side surface portion of the outer box 3 are provided for cleaning. Using the operating lever 72 in the process of pulling out the 2 and the second contact member 33 to invert the toggle mechanism 75 abuts is formed.

  The toggle mechanism 75 is configured such that the direction of the rotational torque applied to the rotational body 73 by the biasing spring 74 is switched by the posture of the rotational body 73 around the support shaft 71, so that the forward / backward direction acting on the operating lever portion 72 by the rotational torque. It is used that the power of is switched. As shown in FIG. 4, when the cleaning tank 2 is pulled out, a clockwise torque in the drawing, that is, a backward force is generated with respect to the operating lever portion 72 (FIG. 6A). The posture shown in FIG. 4 is maintained. Further, as will be described in detail later, when the cleaning tank 2 is in the housed state, the urging direction is switched and a counterclockwise torque is generated in the operating lever portion 72 to keep the inner lid 4 closed. That is, the opening / closing operation of the inner lid 4 is realized by the switching urging means 7. The link mechanism 5, the switching urging means 7, the first abutting member 31, the stopper 32, the second abutting member 33, and the support member 6 are provided on both sides of the inner lid 4, the cleaning tank 2 or the outer box 3. Similarly, they are provided in plane symmetry.

  Further, the inner lid 4 is weakly biased forward by an elastic member (not shown) with respect to the outer box 3, and the front end of the inner lid 4 is in contact with the front inner side of the upper edge portion of the outer box 3. With these supports, the link mechanism 5 can maintain the posture shown in FIG. 4, and the inner lid 4 can be held inside the outer box 3, that is, in an open state. By the way, in the conventional drawer type dishwasher, in order to maintain an open state against the dead weight of the inner lid 4, the urging | biasing force of the said elastic body which is not shown in figure becomes large. For this reason, the force which works in the direction which pulls out washing tub 2 becomes large at the time of storage of cleaning tub 2, and in order to maintain cleaning tub 2 in a storing state, a firm latch mechanism was indispensable. However, in the first embodiment of the present invention, since the weight of the inner lid 4 is received by the support member 6 via the link mechanism 5, the force for urging the inner lid 4 forward may be small. It is unnecessary or can be reduced in size and simplified.

  Next, the operation of the first embodiment configured as described above will be described from the state where the cleaning tank 2 is pulled out. When the dishwasher 1 is used, the inner lid 4 is linked as shown in FIGS. 1 and 4 when the washing tub 2 is pulled out to the left (front) as shown in FIGS. The support member 6 is supported in the gravitational direction via the mechanism 5 and is in contact with the front edge portion of the outer case 3 by an elastic member (not shown) in the front-rear direction. As shown in FIG. 4, the switching urging means 7 is held by a support shaft 71 at the rear portion of the cleaning tank 2 in a state of being urged clockwise. First, after setting tableware in a tableware basket (not shown) and putting in detergent, the washing tank 2 is pushed rightward (rearward) in the figure. At this time, as will be described in detail below, the inner lid 4 installed on the upper inner side of the outer box 3 is closed by the link mechanism 5 to close the opening 2a of the cleaning tank 2 while the packing 41 is deformed. It prevents the washing water at the time of excess or the steam being dried from leaking into the outer box 3 or scattering.

  5 and 6 are explanatory views sequentially showing the transition of the link mechanism 5 and the operation of the inner lid 4 by the switching urging means 7 in the process from the drawer state of the cleaning tank shown in FIG. When the cleaning tank 2 in the drawn state (FIG. 4) is pushed into the outer box 3, the cleaning tank 2 is moved rightward in the figure by the guide rail 11. The inner lid 4 is maintained in the open state as shown in FIG. 4 until the contact slope 22a at the rear end of the protrusion 22 provided on the left and right sides of the cleaning tank 2 contacts the support member 6 on the front side. . When the cleaning tank 2 is pushed to a position where the contact slope 22a of the protrusion 22 contacts the front support member 6, the protrusion 22 acts on the support member 6 as shown by an arrow A in FIG. The support member 6 starts to be pushed clockwise against the clockwise torque. At this time, the protrusion 22 enters between the lower surface of the front sliding roller 55 and the front support member 6, and the front sliding roller 55 is supported from the front support member 6 to the upper surface of the protrusion 22. That is, it transitions into the guide groove 21.

  At this time, even if the cleaning tank 2 is displaced in the vertical direction, the sliding roller 55 is rotated and inserted into the guide groove 21, so that the displacement is absorbed, and the inner lid 4 together with the link mechanism 5 corresponds to the displacement. Although it moves up and down, it is maintained upward while being urged forward by an elastic member (not shown). The right (rear side) end portion of the guide groove 21 may be formed so as to widen toward the end in order to easily receive the sliding roller 55. The rear (right side in the figure) support member 6 is pressed against the stopper 32 while being pulled out, and supports the rear sliding roller 55. Thereby, the inner lid 4 is kept open by the guide groove 21 at the front and by the support member 6 at the rear. Further, when the cleaning tank 2 is pushed in, the support member 6 on the front side is brought down to a substantially horizontal direction while being held down by the lower surface of the projection 22, and the sliding roller 55 on the front side is guided by the guide groove 21. It moves relatively while being held in the vertical direction.

  Thereafter, the support member 6 on the rear side is also rotated clockwise by the contact slope 22 a of the protrusion 22. Finally, as shown in FIG. 5 (b), the inner lid thrusting portion 2 b of the cleaning tank 2 abuts on the abutting portion 4 a that projects downward from the inner lid 4. The contact state between the cleaning tank 2 and the inner lid 4 is maintained by an elastic member (not shown) that urges the inner lid 4 forward. FIG. 6A is a partially enlarged view around the second link member 53B at this time. In FIG. 6, the link connecting member 54 and the packing 41 are not shown. The vertical position of the sliding roller 55 is regulated by the guide groove 21 of the cleaning tank 2. The switching urging means 7 is urged clockwise around the support shaft 71 by an urging spring 74, and the illustrated position is held by a stopper (not shown). At this time, the engaging pin 56 is not in contact with the switching urging means 7. Further, the first link member 53A and the second link member 53B are not in contact with the corresponding first contact members 31, and there is a predetermined gap in the front-rear direction.

  When the cleaning tank 2 is further pushed in the direction of the arrow B in FIG. 5B, the contact part 4a of the inner lid 4 is pushed rightward by the inner lid pushing part 2b of the washing tank 2, so that the link mechanism 5 Also moves to the right in the figure with respect to the outer box 3. As shown in FIG. 5 (c) and FIG. 6 (b), the first linking member 53A and the second link member 53B reach a position where they abut against the first abutting member 31. As shown by an arrow C in FIG. 6B, the first abutting member 31 rotates around the shaft portion 51 provided on the inner lid 4 side on the first link member 53A and the second link member 53B. The engagement pin 56 is engaged with the engagement recess 72 a of the operating lever portion 72, and the toggle mechanism 75 is counterclockwise against the biasing spring 74 via the rotating body 73. Rotate. The same operation is performed on the first link member 53A via the link connecting member 54.

  Here, the sliding roller 55 is restricted from moving in the vertical direction by the guide groove 21, and the inner lid 4 is restricted from moving forward with respect to the cleaning tank 2. The shaft 51 on the side of the inner lid 4 moves downward. Next, the urging direction of the switching urging means 7 becomes counterclockwise at a predetermined pushing amount, and thereafter, the urging direction is actively counterclockwise, as shown in FIG. 6 (c). 4 closes and the closed state is maintained. In this state, a predetermined gap D exists between the first contact member 31 and the first link member 53A or the second link member 53B. In addition, a predetermined gap E exists between the toggle mechanism 75 and the second contact member 33. The closing operation of the inner lid 4 is completed before the storage of the cleaning tank 2 in the outer box 3 shown in FIG. 5D is completed.

  Here, in the housed state of the cleaning tank 2, the horizontal component of the force that urges the inner lid 4 substantially forward and the force that the support member 6 pushes up the lower surface of the protruding portion 22 is the direction in which the cleaning tank 2 is pulled out. It becomes the power of. Here, with respect to the former, since the inner lid 4 is opened by the support member 6, a smaller force is required as compared with the conventional dishwasher, and for the latter, an elastic body (not shown) with respect to the support member 6 is used. Since the inner weight of the inner lid 4 is not directly supported, a weak force is sufficient, and since it is tilted on the lower surface of the projection 22 to the substantially horizontal direction, the horizontal component is extremely small compared to the conventional case. As a result, the latch mechanism, which has been indispensable in the past, is unnecessary, or a smaller and simplified latch mechanism is sufficient.

  The washing and drying operations of the dishwasher 1 are the same as those of the conventional apparatus. When a start button (not shown) is pressed, the water supply valve is operated, and water or water is supplied via the water supply pipe, the water supply valve, and the water supply pipe. Hot water is supplied into the washing tank 2. When a predetermined amount of water is supplied by a water level sensor (not shown), the water supply valve is closed and water supply is stopped. The cleaning pump head 14 is driven by operating the electric motor 16 while the heated water or hot water supplied by a heater (not shown) installed at the inner bottom of the cleaning tank 2 is heated until reaching a predetermined temperature. The pressurized hot water is supplied to the rotary cleaning nozzle 12 having a large number of injection ports 12a. The rotary cleaning nozzle 12 jets cleaning water substantially upward while rotating by a jet flow from the injection port 12a. As a result, the cleaning water hits the tableware (not shown) installed in the tableware basket (not shown) and performs cleaning.

  When the cleaning is completed, the electric motor 16 is reversed and the drain pump head 15 is driven, and the cleaning water stored in the cleaning tank 2 is drained to the sewage pipe through the leftover filter 13, both of which are not shown. . After the drainage is completed, the water supply valve is opened again, a predetermined amount of clean water or warm water is supplied, the same operation as the washing is performed, and the dishes are rinsed and drained. After the predetermined number of rinsing steps are completed, the tableware is dried by applying hot air to the tableware by a drying fan and a heater (not shown). The steam in the cleaning tank 2 is exhausted to the outside of the dishwasher 1 through a steam port (not shown) installed on the front surface of the cleaning tank 2. When the drying is finished, the operation of the dishwasher is finished. When the user pulls out the cleaning tank 2 from the outer box 3, the inner lid 4 operates in a direction to open the opening of the cleaning tank 2 via the link mechanism 5, as will be described in detail below. The fitting with the packing 41 is released from 2a.

Next, the operation when the inner lid 4 opens in conjunction with the drawer of the cleaning tank 2 will be described. 7 and 8 are diagrams for explaining the opening operation of the inner lid 4 by the switching urging means 7 and the transition of the link mechanism 5 in the process in which the cleaning tank 2 is pulled out from the stored state shown in FIG.
When the cleaning tank 2 is pulled forward (leftward in the figure) from the storage state shown in FIG. 7A, the inner lid 4 is brought together with the cleaning tank 2 by the biasing force of an elastic member that biases substantially not shown. Move forward. At the initial stage of movement, as shown in FIG. 8 (a), there is a predetermined gap H between the toggle mechanism 75 and the second abutting member 33, and the inner lid 4 remains closed and the cleaning tank 2 is closed. And pulled forward.

  Next, as shown in FIGS. 7B and 8B, after the operation lever portion 72 of the toggle mechanism 75 and the second contact member 33 are pulled out, the cleaning tank 2 is pulled out. The toggle mechanism 75 is rotated clockwise as shown by an arrow G in FIG. 7B against the counterclockwise torque generated by the biasing spring 74 by the operating force. . At this time, the sliding roller 55 is restricted from moving up and down by the guide groove 21, and the inner lid 4 is restricted from moving backward by the contact portion 4a. The sliding roller 55 is moved rearward (rightward) in the guide groove 21 by the movement, and at the same time, the shaft portion 51 provided on the inner lid 4 side is pushed upward to hold the inner lid 4 upward. increase. Here, the first link member 53A also operates in the same manner via the link connecting member 54 (not shown). Further, the operating lever portion 72 of the toggle mechanism 75 can pass through the lower portion of the second abutting member 33 in the left direction. Further, when the cleaning tank 2 is pulled out, the urging force of the switching urging means 7 is switched and turns clockwise, so that the inner lid 4 is opened as shown in FIG.

  The inner lid 4 is pulled out in conjunction with the cleaning tank 2 until the front comes into contact with the front of the outer box 3, and when it comes into contact as shown in FIG. 7C, only the cleaning tank 2 is drawn out. As the cleaning tank 2 is pulled out, first, the sliding roller 55 provided on the second link member 53 </ b> B comes off the guide groove 21. At this time, the support member 6 on the rear side is rotated counterclockwise by the urging force of an elastic member (not shown), so that the support portion faces upward as in the pulled out state. The support smoothly transitions from the guide groove 21 to the support portion formed by the upper surface of the support member 6. As the cleaning tank 2 is pulled out, the support for the sliding roller 55 on the first link member 53A side is similarly transferred to the support member 6, so that the inner lid is similar to the pulled-out state shown in FIG. 4 becomes an open state. When the cleaning tank 2 is pulled out, a torque in the clockwise direction is generated around the shaft portion 51 in the link member 53 due to the friction between the sliding roller 55 and the guide groove 21, but the link member 53 is not shown in the drawing. Thus, the posture of FIG. 8C is maintained by being restrained by the inner lid 4 within a predetermined torque range.

  Here, since the switching urging means 7 is used for the opening / closing operation of the inner lid 4, the inner lid 4 starts to move in conjunction with the cleaning tank 2 at the time of pushing operation, or is pulled out from the stored state at the time of pulling out operation. When starting the operation, a predetermined gap D, E (FIG. 6 (c)) or gap H (FIG. 8 (a)) can be secured between the members for switching the switching urging means 7, and the switching urging means 7 can be secured. Since the switching of the means 7 can be actively switched by the biasing spring 74 if there is a certain amount of movement, the first abutting member 31 and the second abutting member 31 installed in the outer box 3 by being cut and raised. The position error of the abutting member 33 can be absorbed. Further, since the switching urging means 7 is rotatably provided on the support shaft 71 provided in the cleaning tank 2, even if there is a vertical displacement between the cleaning tank 2 and the outer box 3, the sliding roller Since the vertical displacement can be corrected by 55 and the guide groove 21, the engagement pin 56 can be reliably engaged with the engagement recess 72 a of the switching urging means 7.

  As described above, according to the first embodiment, the pivot mechanism 52 of the link mechanism 5 for opening and closing the inner lid 4 is separated from the outer box, so that the outer box 3 supports the link mechanism 5 in the direction of gravity. Only constituent members that do not require high molding and processing accuracy, such as the support member 6, the first contact member 31, and the second contact member 33, may be provided. Further, as for the displacement in the height direction of the link member 53, the position bias in the vertical direction is absorbed by the guide portion 23 formed in the cleaning tank 2, and the switching biasing means 7 for performing the opening / closing operation is fixed to the cleaning tank 2 so as to be rotatable. Therefore, it is possible to absorb the positional deviation in the vertical and longitudinal directions and maintain a high sealing function. Further, since the inner lid 4 operates only in the vertical direction with respect to the cleaning tank 2 by using the active operation of the switching urging means 7, the packing 41 is not rubbed and high reliability can be secured.

  Further, the force for pulling out the cleaning tank 2 in the housed state is small, and a latch mechanism is unnecessary, or a latch mechanism that is miniaturized and simplified is sufficient. Further, since the switching urging means 7 is constituted by the toggle mechanism 75 using the urging spring 74, electricity is unnecessary and it can be constituted by a simple element, so that it is possible to obtain an inexpensive and highly reliable mechanism. . The link connecting member 54 is coaxial with the pivot 52 that supports the sliding roller 55, but it can be installed anywhere as long as a four-bar link can be formed, and it goes without saying that the same effect can be obtained.

  Further, by using the switching urging means 7 as a drive source for the opening / closing operation of the inner lid 4, the closing operation completion position and the opening operation start position of the inner lid 4 are different from the storage state of the cleaning tank 2, for example, the near side In addition, the maintenance force of the closed state of the inner lid 4 is secured by the switching urging means 7. This makes it possible to easily use for the dishwasher the system used to pull out the system kitchen, where the drawer is drawn from the position immediately before storage to the system kitchen side, ensuring the uniformity of the system kitchen and the washing tank. Even when the 2 is pulled out and stored by an electric or hydraulic actuator, the driving force immediately before the storage state is smaller than that of the conventional inner lid opening / closing mechanism, so the actuator can be downsized and inexpensive dishwashing A machine can be provided.

  Further, although the engaging pin 56 that synchronizes with the front-rear direction operation of the switching urging means 7 is installed between the shaft portion 51 on the inner lid 4 side and the pivot 52 that is the rotation shaft of the sliding roller 55, the second link member If it is above 53B, it may be shared by, for example, the pivot 52 which is the rotation shaft of the sliding roller 55 other than the shaft portion 51 on the inner lid 4 side, and the same effect can be obtained. Furthermore, although the case where the switching urging means 7 is installed with respect to the second link member 53B has been described, only the first link member 53A or both the first link member 53A and the second link member 53B. It may be installed in any case, or may be changed in any place, or may be used in any case as long as the same function can be exhibited, such as using a separate member instead of cutting and raising the outer box 3. It goes without saying that can be obtained.

Embodiment 2. FIG.
FIG. 9 is a side sectional view showing an essential part of a dishwasher according to Embodiment 2 of the present invention. The same reference numerals are used for the same or corresponding parts as those in the first embodiment. In the second embodiment, the rear end portion of the link connecting member 57 extends further rearward than the second link member 53B, and the left and right link connecting members 57 are connected to each other by a connecting pin 58 provided at the rear end portion. . With such an arrangement, the switching urging means 7 can be installed behind the cleaning tank 2. In this case, the switching urging means 7 can be configured not to be arranged on both the left and right sides but only one in the center. Since other configurations such as a method for supporting the inner lid 4 are the same as those in the first embodiment, description thereof is omitted.

  In the second embodiment configured as described above, the same effects as in the first embodiment can be obtained, and the switching urging means 7 that is the operation unit can be installed at a position hidden from the user, so that the design property is improved. In addition to improving, no safety cover or the like is required.

Embodiment 3 FIG.
FIG. 10 is a side sectional view showing a main part of a dishwasher according to Embodiment 3 of the present invention. The same reference numerals are used for the same or corresponding parts as those in the first embodiment. In the first and second embodiments, the cleaning tank is drawn out in the front-rear direction (left-right direction in the figure). However, in this third embodiment, the dishwasher is installed in a liftable cupboard in which the cleaning tank operates in the vertical direction. An example when 10 is incorporated will be described. In the figure, the opening 20a of the cleaning tank 20 is provided in the front (left side in the figure), and the removal and insertion of unillustrated tableware is performed by lowering the cleaning tank 20 along the guide rail 11 and pulling it out from the outer box 30. . Here, the vertical movement of the cleaning tank 20 is realized by a known technique such as an electric or hydraulic actuator (not shown), or manually by reducing an operation force using an assist mechanism using a spring or the like. You can do it.

  The link mechanism 5 is configured in the same manner as in the first embodiment except that the installation direction is different by 90 degrees. That is, two shaft portions 51 provided on the side end portion of the inner lid 40 so as to be separated from each other in the vertical direction and a front portion (left side in the figure) are pivotally attached to the shaft portion 51 and pivotally mounted on the rear portion. A pair of link members 53 (first link member 53A, second link member 53B) having a pivotal connection with the rear portions of a pair of link members 53 that are pivotally attached to a pivot 52 and arranged vertically. The inner lid 40 and the pair of link members 53 comprise a four-bar link mechanism constituted by a link connecting member 54 that forms a quadrilateral. The second link member 53B is provided with an engaging pin 56 that engages with the switching biasing means 7 at a predetermined time. Further, the support member 60 that holds the link mechanism 5 in the direction of gravity via the sliding roller 55 is installed on the outer box 30 so as to form an inclined surface whose front side is lowered. The same is true for the symmetrical installation on the left and right sides of the inner lid 40.

  Unlike the first and second embodiments, the support member 60 may be fixed, so that the outer box 30 may be cut and raised. Here, the link member 53 pivotally supported by the shaft portion 51 provided on the side surface of the inner lid 40 on the front side (left side in the drawing) is connected to the pivot 52 on the rear side (right side in the drawing) of the shaft portion 51. Since the counterclockwise rotation from the position shown in FIG. 10 is prevented by a stopper (not shown), the support member 60 is inclined when the cleaning tank 20 is pulled out from the outer case 30 in the lowered state. Due to the downward weight of the inner lid 40 acting on the surface and being locked together with the link mechanism 5 in the direction of gravity, the inner lid 40 is locked while being pushed against the front inner surface of the outer box 30 and cleaned. It is an open position with respect to the opening 20a of the tank 20.

  The cleaning tank 20 is provided with a guide portion 230 composed of a guide groove 210 and a protrusion 220 similar to the first embodiment for receiving the sliding roller 55 on the side surface, and the protrusion 220 is similar to the first embodiment. Switching urging means 7 is provided. Further, an inner lid thrusting portion 20b is projected upward from the upper front end portion of the cleaning tank 20. In FIG. 10, the link mechanism 5 is illustrated on the front side of the inner lid 40, the support member 60 is illustrated on the back side, and the guide portion 230 of the cleaning tank 20 is illustrated on the front side. Further, the upper end portion of the inner lid 40 is provided with an abutting portion 40a formed in a substantially L-shaped cross section with which the inner lid pressing portion 20b abuts in the process of housing the cleaning tank 20 in the outer box 30. Protrusions 40 b that contact the inner surface of the outer box 30 are provided on the front side of the upper and lower ends of the inner lid 40. Further, the outer box 30 is provided with a first abutting member 310 similar to that of the first embodiment at one location in the vertical direction and a second abutting member 330 at the top. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  Next, the main operation of the third embodiment configured as described above will be described. When the cleaning tank 20 moves upward and starts to be stored in the outer box 30, the lower sliding roller 55 and the upper sliding roller 55 are sequentially inserted into the guide grooves 210 installed on both side surfaces of the cleaning tank 20. By inserting (following), the position of the inner lid 40 in the front-rear direction with respect to the cleaning tank 20 is regulated. Here, the sliding roller 55 is still supported by the inclined surface of the support member 60. Further, when the cleaning tank 20 rises, the inner lid pushing part 20b installed on the upper front side of the cleaning tank 20 comes into contact with the abutting part 40a protruding rearward above the inner lid 40, thereby sliding. The roller 55 rises together with the inner lid 40 and the link mechanism 5 in conjunction with the upward movement of the inner lid pushing portion 20 b and is separated from the support member 60. Thus, the installation accuracy of the support member 60 does not depend on the opening / closing operation of the inner lid 40.

  The subsequent closing operation and opening operation of the inner lid 40 by the switching urging means 7 and the sealing operation for the opening 20a by the packing 41 are basically the same as those in the first embodiment, and the description thereof is omitted here. . Further, it is possible to use the same configuration as that of the second embodiment, and it goes without saying that the same effect can be obtained even in that case. Further, the support member 60 may be provided at any one position, or may support the link connecting member 54 other than the sliding roller 55, for example.

In the third embodiment configured as described above, the same effects as in the first or second embodiment can be obtained, and the support member 60 can be formed by cutting the outer box 30 and without high-precision processing. Since it can be realized, a cheaper dishwasher can be provided.
In addition, in the conventional inner lid opening / closing mechanism, since the inner lid is kept closed by pushing the washing tub, in addition to the weight of the washing tub including tableware and washing water, there is a holding force to keep the inner lid closed. Necessary. However, in the third embodiment, the switching urging means 7 maintains the closed state of the inner lid 40, so that the force for maintaining the cleaning tank 20 in the stored state is reduced, and the latch for fixing the cleaning tank 20 in the stored state. The mechanism can be simplified and a cheaper dishwasher can be provided.

  By the way, in the description of the first to third embodiments, as the switching means of the switching urging means 7, the first abutting members 31 and 310 that cut and raise the outer boxes 3 and 30 are engaged with the second link member 53B. Used to close the inner lids 4 and 40, and the second abutting members 33 and 330 are engaged with the operating lever portion 72 constituting the switching urging means 7 to be used for opening the inner lids 4 and 40. However, the present invention is not necessarily limited to this. In short, a similar effect can be obtained by engaging arbitrary swinging parts including the first link member 53A, the link connecting members 54, 57, and the like constituting the link mechanism 5, for example. Moreover, although the support member 6 was formed in the substantially block-shaped rectangular parallelepiped, of course, the shape of the support member 6 is not limited. Furthermore, although the case where the outer boxes 3 and 30 are fixed and the cleaning tanks 2 and 20 are put in and out has been described, the cleaning tank may be fixed and the outer box may be moved.

  Furthermore, although the method of using the toggle mechanism 75 and its biasing spring 74 as the switching biasing means 7 has been exemplified, it goes without saying that the same effect can be obtained even with other methods. In addition to such a mechanical method, for example, an electromagnetic solenoid or the like is used as a means for switching the direction of the urging force, and a contact or approach between the first contact member 31 and the second contact member 33 is switched. It is possible to detect by the detection means, and to control the electromagnetic solenoid based on the detection result to switch the direction of the urging force.

It is side surface sectional drawing which shows notionally the principal part structure of the state by which the washing tank of the dishwasher by Embodiment 1 of this invention was pulled out. It is a top view of the dishwasher shown in FIG. It is side surface sectional drawing which shows the principal part structure of the state in which the washing tank shown in FIG. 1 was accommodated in the outer box. It is side surface sectional drawing which shows the link mechanism shown by FIG. 1 by the relationship between the guide part and switching biasing means which were provided in the washing tank. It is a figure explaining the transition of the link mechanism in the process from the drawer | drawing-out state of the washing tank shown in FIG. 1 to the accommodation state, and operation | movement of the inner cover by a switching biasing means in order. It is a figure which expands and shows the principal part of (b) of FIG. 5, (c), (d), respectively. It is explanatory drawing which shows the opening operation | movement of the inner cover by the switching urging means and the transition of a link mechanism in the process in which a washing tank is pulled out from the accommodation state shown in FIG. It is a figure which expands and shows the principal part of Fig.7 (a), (b), (c), respectively. It is side surface sectional drawing before the washing tank outer side in the drawer state of the tableware washing machine by Embodiment 2 of this invention. It is side surface sectional drawing before the washing tank outer side in the drawing-out state of the dishwasher by Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,10 Tableware washing machine, 11 Guide rail, 12 Rotating washing nozzle, 12a Injection port, 13 Vegetable filter, 14 Washing pump head, 15 Drainage pump head, 16 Electric motor, 2,20 Washing tank, 2a, 20a Opening part, 2b, 20b Inner lid protrusion, 21, 210 guide groove, 22, 220 protrusion, 22a abutting slope, 23, 230 guide, 3, 30 outer box, 31, 310 first contact member, 32 stopper, 33, 330 2nd contact member, 4, 40 Inner lid, 4a, 40a Contact part, 40b Protrusion part, 41 Packing, 5 Link mechanism, 51 Shaft part, 52 Axis, 53 Link member (53A 1st link member, 53B second link member), 54, 57 link connecting member, 55 sliding roller, 56 engaging pin, 58 connecting pin, 6, 60 support member, 7 cut E biasing means, 71 shaft, 72 actuating lever, 72a engaging recess 73 rotation body, 74 urging spring 75 the toggle mechanism.

Claims (12)

  A cleaning tank having an opening provided in the outer box so as to be able to be taken in and out, an inner lid for sealing the opening of the cleaning tank provided in the outer box, and the inner lid for the cleaning tank. In a dishwasher comprising a link mechanism for opening and closing the opening portion in conjunction with loading and unloading, the link mechanism is gravity-provided when the washing tub provided on the side wall portion of the outer box is pulled out. And a support member that is supported along the side of the cleaning tank, and the link mechanism is moved from the support member in the process of housing the cleaning tank in the outer box and is held in the opening / closing direction of the inner lid. A dishwasher comprising: a guide portion; and switching urging means that engages with the link mechanism and opens or closes the inner lid in conjunction with the insertion and removal of the washing tank. .   The dishwasher according to claim 1, wherein the outer box has an opening at a front portion thereof, and the washing tank is taken in and out of the outer box in the front-rear direction.   The link mechanism has a pair of links each having an engaging body that is pivotally provided on a shaft portion that is provided on the inner lid so as to be separated from each other in the front-rear direction, and that can be engaged with the guide portion on the lower portion. And a link connecting member that forms a quadrangle with the inner lid and the pair of link members by pivotally connecting lower portions of the pair of link members to each other. 2. The dishwasher according to 2.   The support member is made of a block material that is pivotably protruded with respect to the outer box and has a support portion formed on the upper surface for receiving the lower portion of the engagement body. The block material is tilted to the front side. When the cleaning tank is pulled out, the support portion is locked in an upward direction, and the guide portion resists the biasing force when the cleaning tank is accommodated. The dishwasher according to claim 3, wherein the dishwasher is tilted so that an upper surface thereof faces rearward and operates so that the engaging body is transferred to and held by the guide portion.   2. The dishwasher according to claim 1, wherein the outer box has an opening in a lower portion, and the washing tank is taken in and out of the outer box in the vertical direction.   The link mechanism includes a pair of engaging members that are rotatably provided on shafts that are provided with front parts spaced apart from each other in the vertical direction on the inner lid, and that can engage with the guide parts on the rear part. A link member and a link connecting member that rotatably connects the rear portions of the pair of link members to form a quadrangle with the inner lid and the pair of link members are provided. Item 6. A dishwasher according to Item 5.   The support member has an inclined surface in which a support portion for receiving a lower portion of the engaging body is lowered to the front side, and the inner lid is moved by the downward weight of the inner lid when the cleaning tank is pulled out. The link member is locked while being in contact with the inner surface on the front side of the box, and when the engaging body transitions to the guide portion and is held by the guide portion in the process of housing the cleaning tank. The dishwasher according to claim 6, wherein the dishwasher is held in an opening / closing direction of the inner lid through a wall.   8. The dishwasher according to claim 3, wherein the engaging body is formed of a sliding roller that is rotatably supported by the link member. Machine.   9. The dishwasher according to claim 3, wherein the guide portion includes a guide groove that receives the engaging body.   10. The tableware according to claim 3, wherein the link member is provided with an engagement pin that engages with the switching urging means. washing machine.   The switching urging means is provided on a support shaft provided at a predetermined portion of the cleaning tank, is rotatably provided with respect to the support shaft, and engages with an engagement pin protruding from the link member. A rotating body having an operating lever portion formed with an engaging recess for opening and closing the inner lid via a link member, and one end portion locked to a predetermined portion of the rotating body and the other end portion of the cleaning tank A toggle mechanism using a biasing spring that is locked to a predetermined part, and is provided on the side part of the outer box, and engages with the link member in a process in which the cleaning tank is accommodated in the outer box, A first abutting member for rotating the rotating body in a first direction for urging the urging spring to close the inner lid via the link member, and a side surface portion of the outer box projectingly provided. , A second abutting portion that reverses the toggle mechanism by contacting the operating lever portion in the process of pulling out the cleaning tank Dishwashing machine according to claim 10, characterized in that it is configured with, the. The dishwasher according to any one of claims 1 to 11, wherein the switching urging means comprises a plunger using an electromagnet.

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