JP4396685B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher for cleaning dishes by spraying washing water from a washing nozzle toward the dishes, and more particularly to a built-in type dishwasher.

  With the spread of the system kitchen to general households, built-in type dishwashers to be incorporated into the system kitchen are commercially available.

  As a conventional dishwasher suitable for the built-in type, there is one as shown in FIG. 6 (see, for example, Patent Document 1).

  FIG. 6 is a longitudinal sectional view of a conventional dishwasher described in Patent Document 1.

  In FIG. 6, the conventional dishwasher is configured such that a washing tub 23 that houses a tableware basket 22 for storing tableware 21 is configured to be able to be drawn forward together with a door 24 that also serves as a front panel, and the washing tub 23 is pulled out. Then, the upper surface of the washing tub 23 is wide open so that the tableware 21 can be taken in and out from above, and the lock operation unit 26 disposed on the door 24 for pushing the washing tub 23 into the housing 25 is used. An operator operates to constrain the cleaning tank 23 and the upper lid 27 waiting in the upper space in the housing 25 is lowered to close the upper surface opening of the cleaning tank 23.

  The cleaning water in the cleaning tank 23 is heated by the heater 28, sucked from the drain port 31 through the residue filter 30 by the cleaning pump 29, and pumped to the cleaning nozzle 32. The tableware 21 disposed and accommodated in the tableware basket 22 is cleaned by the cleaning water sprayed from the cleaning nozzle 32 with vigorous force.

In addition, in order to reduce the locking operation by the user, the toggle mechanism is used as a holding unit that automatically holds the washing tank in a state of being pushed into the main body case, and has a basic configuration similar to the above-described content. There is also a dishwasher that supplies air to the packing from the air pump by turning on and off the switch linked to the toggle mechanism and maintains the restraint state of the washing tank by pressurizing the washing tank (for example, Patent Document 2).
JP 2000-139799 A JP 2002-219082 A

  However, in the conventional drawer-type dishwasher as described in Patent Document 1, the washing tank must be restrained by operating the lock operation unit disposed on the front panel one by one. There is a problem that the restraint operation cannot be surely performed in recent years when it is annoying and the number of elderly people is increasing.

  In addition, as in the dishwasher described in the above-mentioned Patent Document 2, using a toggle mechanism or the like that automatically restrains the washing tank by air pump pressurization or the like, there are many complicated parts. In addition, a toggle mechanism (holding means) that is placed on either the left or right side of the cleaning tank can be used to hold the cleaning tank smoothly due to dimensional variations of parts and uneven application of force to the left and right. Since there was also a problem that the toggle mechanism was arranged in a pair on the left and right sides, the switching mechanism of the means for restraining the washing tank was interlocked with the reversing action, but only one set of restraining means on one side Due to the left and right play due to the arrangement, there is a problem that the restraint is unintentionally released when a force is applied to open the cleaning tank during restraint.

The present invention solves the above-described conventional problems, and by simply moving the washing tub into the dishwasher body, the movement of the washing tub is restrained to reduce the labor of the user and An object of the present invention is to provide a dishwasher that can be reliably held right and left in its storage position, and that the restraint is not inadvertently released by left and right play during restraint.

In order to solve the above-described conventional problems, a dishwasher according to the present invention includes a substantially box-shaped dishwasher body that opens forward, and is housed in the dishwasher body so as to be movable in the front-rear direction and has an opening upward. A cleaning tank, biasing means for biasing and holding the cleaning tank in a storage position, position detection means for detecting whether or not the cleaning tank is in the storage position, and the cleaning by the signal of the position detection means A restraining means for restraining movement of the tank, and the restraining means is provided at a position biased to either the left or right of the back surface of the washing tank, and the biasing means and the position detecting means are the dishwasher. At least one each is arranged on each of the left and right side surfaces of the main body, and the urging means has an arm part that rotates and reverses according to the position of the cleaning tank, and directly operates the position detecting means by the arm part. and so, the cleaning tank, When it is constrained by serial restraining means, provided rotatably by said restraining means to the fulcrum, among the position detection means provided on left and right sides of the dishwasher main body, the side closer to said restraining means When the washing tank is pulled out from the dishwasher main body, the position detection means is cut earlier than the far-side position detection means, and the washing tank is simply stored in the dishwasher main body with a simple configuration. Therefore, the manual operation of the washing tub by the user is not required, and the urging means provided on the left and right sides of the dishwasher body can hold the washing tub evenly in the left and right storage positions. In addition, when the cleaning tank is restrained, even if the cleaning tank rotates with the restraining means side as a fulcrum by left and right play etc., the restraint is not released due to malfunction and the safety is high. dishwasher It is possible to provide.

  The dishwasher of the present invention has a simple configuration, and the washing tank is restrained only by storing the washing tank in the dishwasher body. By the biasing means provided on both sides, the washing tank can be securely held in its left and right storage position, and when the washing tank is restrained, the restraining means side is used as a fulcrum with the left and right play etc. Even when the washing tank is rotated, the malfunction is not released due to a malfunction, and the safety is high.

According to a first aspect of the present invention, there is provided a substantially box-shaped dishwasher body that opens forward, a washing tank that is movably stored in the dishwasher body in the front-rear direction, and that has an opening at the top, and a position where the washing tank is stored. Biasing means for biasing and holding, position detection means for detecting whether or not the cleaning tank is in the storage position, and restraining means for restraining the movement of the cleaning tank by a signal of the position detection means. The restraining means is provided at a position biased to either the left or right side of the back surface of the washing tank, and the biasing means and the position detecting means are at least one each on the left and right side surfaces of the dishwasher body. The biasing means has an arm portion that rotates and reverses in accordance with the position of the cleaning tank, and the position detecting means is directly operated by the arm portion, and the cleaning tank includes the restraining means. When restrained by And the serial restraining means to pivot rotatably provided, among the position detection means provided on left and right sides of the dishwasher main body, the position detecting means closer to said restraining means, the cleaning tank is the dishwasher When it is pulled out from the machine body, it is cut faster than the position detection means on the far side, and the washing tank is restrained by simply storing the washing tank in the dishwasher body with a simple configuration. When the washing tank is not required to be restrained and the washing tank can be securely held in its left and right positions by the biasing means provided on the left and right sides of the dishwasher body, and when the washing tank is restrained In addition, even when the washing tub is rotated about the restraint means side as a fulcrum due to left and right play or the like, the restraint is not released due to malfunction and a highly safe dishwasher can be provided.

In particular, the second invention is such that the restraint means does not operate unless all of the position detection means arranged on the left and right side surfaces of the dishwasher main body of the first invention are detected. When the detection means breaks down or there is a component defect, the restraint means does not operate, so that safety can be improved.

  In the third invention, in particular, the urging means and the position detecting means of the first or second invention are arranged in the rear of the dishwasher main body, so that the size of the dishwasher main body is not increased carelessly. The space inside the dishwasher can be used effectively.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic longitudinal sectional view showing the entire configuration of the dishwasher according to the first embodiment of the present invention, and shows a state where the washing tub is completely accommodated in the dishwasher body. FIG. 2 is a schematic cross-sectional view of the dishwasher, and shows the arrangement position of the urging means arranged on the inner surface of the dishwasher body. FIG. 3 is a schematic cross-sectional view of the dishwasher, showing a cross section at a position where the reversing spring unit is disposed. 4 is an enlarged cross-sectional view of a portion A in FIG.

  1-4, the dishwasher in this Embodiment is the dishwasher main body 1 formed in the substantially box shape opened ahead, and the guide rail laid substantially horizontally inside the both sides wall of the said dishwasher main body 1 A washing tank 2 that can be drawn and moved in the front-rear direction along 1a and has an opening 2f on the upper side, a dish basket 3 that is provided inside the washing tank 2 and that arranges the dishes 11; A cleaning nozzle 4 for ejecting water for cleaning 11 is provided.

  The front surface of the cleaning tank 2 is equipped with a panel 2a having a design similar to that of a system kitchen (not shown). The panel 2a has a handle portion that a user grips when opening and closing the entire cleaning tank 2. 2b and an operation switch for controlling the dishwasher (start / pause control of cleaning, not shown). Further, rods 2d that engage later-described urging means for guiding and holding the washing tub 2 at predetermined positions of the dishwasher main body 1 are provided on both rear side surfaces of the washing tub 2 so as to protrude.

  On the rear side surface in the dishwasher main body 1 are a reversing spring unit 5 serving as an urging means for guiding and holding the washing tub 2 to a predetermined storage position, and a position detection means for detecting the storage position of the cleaning tub 2. The position detection switch unit 6 is integrally fastened and fixed, and a pair of left and right positions are arranged.

  The reversing spring unit 5 includes a reversing spring 5a serving as a power source and a case portion 5c provided with an arm portion 5b that engages with the rod 2d of the cleaning tank 2 and rotates and reverses. The position detection switch unit 6 integrally fastened with the case part 5c of the reversing spring unit 5 is hit by the micro switch 6a and the tip part 5b-1 of the arm part 5b and pushes the button 6a-1 of the micro switch 6a. The switch cam 6b is configured to be rotatable, and the switch case 6d is provided with a return spring 6c for the switch cam 6b.

  Reference numeral 7 denotes a lock motor that is a restraining means that moves and restrains the cleaning tank 2 by operating in response to a signal from the micro switch 6a that detects that the cleaning tank 2 is stored in a predetermined position. It has a general configuration that decelerates the rotation of the motor and generates output torque, and has a clutch mechanism, and the movement in the rotation direction is converted into the horizontal direction by the rack and pinion gear at the final stage of deceleration, and the lock pin 7a protrudes against the urging force of a lock pin spring (not shown).

  As described above, the dishwasher according to the present embodiment is provided with the position detection switch 6 as the position detection means and the lock motor 7 as the restraining means at the rear of the dishwasher main body 1. It is added that the design close to that of a general kitchen door can be realized because it is not necessary to dispose the door opening / closing switch and its operation lever part which are indispensable to the front panel of the dishwasher.

  Also, above the dishwasher main body 1, an inner lid 8 for closing the upper opening 2f of the washing tub 2 is disposed so as to be movable up and down by a pair of left and right parallel link mechanisms including a pair of front and rear links 8a. Yes. A pump 9 that sucks water and discharges it to the washing nozzle 4 and a control circuit 10 that controls the operation of the dishwasher main body 1 are installed below the washing tank 2.

  In the present embodiment, the lock motor 7 does not operate unless all of the position detection switch units 6 arranged on the left and right side surfaces of the dishwasher main body 1 perform detection operation.

  Next, the operation of the dishwasher having the above configuration will be described.

  The user places the tableware 11 in the tableware basket 3, puts it in the washing tub 2, puts the detergent, pushes the operation switch, and closes the washing tub 2. The washing tank 2 is housed in the dishwasher body 1 along the guide rail 1a. At this time, the locking portion 8b provided at the rear end of the inner lid 8 is pushed by the upper end of the rear wall of the cleaning tank 2, and the inner lid 8 moves rearward against the urging force of the inner lid spring 8c. As a result, the inner lid 8 moves rearward and downward by the link mechanism 8a, and closes the opening 2f above the cleaning tank 2.

  At the same time, the rods 2d on both sides of the rear of the washing tub 2 and projecting toward the dishwasher main body 1 are engaged with the grooves 5b-2 of the arm portion 5b of the reversing spring unit 5, and the arm portion 5b starts to rotate. When the reversing spring 5a suspended from the arm portion 5b extends and reaches the dead point, the maximum load is exerted and the arm portion 5b rotates to a position close to about 90 ° from the initial position, and the washing tank 2 Is held at a predetermined storage position in the inner back of the dishwasher body 1. At this time, at the moment when the tip 5b-1 of the arm 5b is turned and reversed, the lever 6b-1 of the switch cam 6b of the position detection switch unit 6 is beaten, and the switch cam 6b is turned and its convex part 6b- 2, the button 6 a-1 of the micro switch 6 a is pushed, a switch contact (not shown) in the micro switch 6 a is closed, and a signal for operating the lock motor 7 is generated to restrain the cleaning tank 2.

  Thus, since the operation for holding the cleaning tank 2 also serves as a detection operation for restraining it, each function can be realized with a simple configuration without requiring parts. After that, the lock motor 7 is operated and the lock pin 7a protrudes by the rotation of the gear and is fitted and inserted into the lock pin fitting portion 2e provided on the rear surface of the cleaning tank 2 to restrain the movement of the cleaning tank 2.

  Since the above operation is performed by the operation of the two reversing spring units 5 disposed on both rear side surfaces of the dishwasher main body 1, a uniform load is applied to the washing tank 2 in the right and left, resulting in dimensional variations in parts, etc. The movement is unaffected.

  Moreover, the above operation | movement is description in the state by which the operation switch was pushed previously, It is also possible to operate an operation switch, after putting the washing tank 2 in the predetermined position in the dishwasher main body 1. FIG. In this case, only the cleaning tank 2 is held by the reversing spring unit 5 to stand by.

  As described above, according to the present embodiment, the cleaning tank is reliably restrained only by the user closing the cleaning tank, and the cleaning tank can be guided and held with simple components. In addition, it is easy to use and can be performed smoothly without being affected by variations in dimensions.

(Embodiment 2)
FIG. 5 is a plan sectional view showing the operation of the dishwasher according to the second embodiment of the present invention. Note that the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the first embodiment, the switch cam 6b of the position detection switch unit 6 integrated with the reversing spring units 5 arranged on the left and right side surfaces of the dishwasher body 1 is assumed to use the same two parts on both the left and right sides. As described above, only one set of the lock motor 7 serving as the restraint means can be installed due to the cost, and the position where the lock motor 7 is arranged due to the arrangement with various other parts not shown is the washing tank. 2 is not limited to the center position of the back surface portion, and is often a position biased to one of the side surfaces of the cleaning tank 2.

  In such a case, when a force is applied to open the cleaning tank 2 while the cleaning tank 2 is restrained, the lock pin 7a of the lock motor 7 is engaged with the lock pin of the cleaning tank 2, as shown in FIG. Rotating by the backlash of the dishwasher main body 1 and the washing tub 2 and the elastic deformation of each component (3.0 to 4.0 mm in actual measurement) in the opposite direction with the position fitted and inserted into the portion 2e as the base point Therefore, there is a problem that the micro switch 6a of the position detection switch unit 6 installed on the side opposite to the side having the lock pin fitting portion 2e is opened, and the restriction is released unintentionally. In the embodiment, the position of the convex portion 6b-2 of the switch cam 6b shown in FIG. 4 is shifted counterclockwise by a certain amount (14.5 ° in this embodiment), and the micro switch on the side where the lock pin 7a is located. Compared to 6a, Chi 6 enters quickly, is obtained by a slow off such settings (see Fig. 5 and Table 1).

  As described above, according to the present embodiment, the position detection switch unit installed on the non-locking side (the side far from the lock pin 7) even when a force is applied to open the cleaning tank 2 during its restraint. It is possible to prevent 6 from malfunctioning and opening.

  As described above, the dishwasher according to the present invention has a simple configuration, and the washing tub is restrained only by storing the washing tub in the dishwasher main body. In addition, the urging means provided on the left and right sides of the dishwasher main body can hold the washing tub evenly in the left and right positions, and when the washing tub is restrained, Even if the washing tank rotates with the restraining means side as a fulcrum, it does not malfunction and the restraint is not released, and it is highly safe, not only a domestic dishwasher but also a commercial dishwasher It is also useful.

Schematic longitudinal cross-sectional view which shows the whole structure of the dishwasher in Embodiment 1 of this invention Schematic sectional view of the dishwasher Schematic sectional view of the dishwasher Enlarged sectional view of the reversing spring unit and position detection switch unit of the dishwasher Plan sectional drawing which shows operation | movement of the dishwasher in Embodiment 2 of this invention. Vertical section of a conventional dishwasher

1 Dishwasher body 2 Washing tank 5 Reversing spring unit (biasing means)
5b Arm part 6 Position detection switch unit (position detection means)
7 Lock motor (restraint)

Claims (3)

A substantially box-shaped dishwasher body that opens forward, a washing tank that is movably stored in the dishwasher body in the front-rear direction, and that has an opening at the top thereof. Biasing means, position detecting means for detecting whether or not the cleaning tank is in the storage position, and restraining means for restraining the movement of the cleaning tank by a signal of the position detecting means,
It said restraining means is provided one at a position offset to the left or right of the rear portion of the cleaning tank, by at least one each disposed on left and right side surfaces of the dishwasher body and the position detecting means and said biasing means The biasing means has an arm portion that rotates and reverses according to the position of the cleaning tank, and the position detecting means is directly operated by the arm portion, and the cleaning tank is moved by the restraining means. when being constrained, rotatably provided in the restraining means as a fulcrum, of said position detecting means provided on left and right sides of the dishwasher main body, the position detecting means closer to said restraining means The dishwasher that cuts earlier than the position detection means on the far side when the washing tub is pulled out from the dishwasher body . 2. The dishwasher according to claim 1, wherein the restraining means does not operate unless all of the position detection means arranged on the left and right side surfaces of the dishwasher main body are detected. 3. The dishwasher according to claim 1 or 2, wherein the urging means and the position detecting means are arranged in the interior rear of the dishwasher body.

Images