JPH11276406A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce shock applied on a door when the door is opened in a dishwasher provided with an automatic door opening mechanism. SOLUTION: A dishwasher 1 is provided with a washing chamber 3 formed at an upper part of a main body 2, a door 17 supported on the main body 2 to be freely movable in a vertical direction to open the washing chamber 3, and a first energization member 23 to constantly energize to pull up the door 17 to open, and a lock mechanism 36 to hold a closed condition of the door 17. A second energization member 40 to energize the door 17 in an opening direction only in starting opening of the door 17 is disposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher which opens and closes a washing chamber with a vertically movable door and has an automatic door opening mechanism.

[0002]

2. Description of the Related Art Conventionally, a dishwasher of this type is provided with washing nozzles (washing jet nozzles) above and below a washing chamber formed in the upper part of a main body, as disclosed in, for example, Japanese Patent Application Laid-Open No. 6-142028 (A47L15 / 42). Rinsing nozzles (rinse spray nozzles) are rotatably arranged, and are configured to wash and rinse objects to be cleaned such as dishes stored between them.

The washing chamber is opened and closed by a box-shaped door supported on the main body so as to be movable up and down, and the door is pulled up by an urging spring and is always urged in an opening direction. During the washing and rinsing operations, the door is pulled down and closed against the urging force of the urging spring, and the closed state is held by the lock mechanism. When the washing and rinsing operations are completed, the lock mechanism is released, and the door is automatically pulled up by an urging spring and is opened.

[0004]

According to the dishwasher provided with such an automatic opening mechanism, the work of cleaning an object to be washed is facilitated and labor saving is promoted. Requires a large spring force because the entire weight of the door must be pushed up, while the door can be opened sufficiently with a small spring force during or at the end of opening the door.

[0005] Therefore, if the door is opened with the same large spring force from the start to the end of the opening as in the prior art, there is a problem that the door stopper and the like for regulating the door at the end of the opening of the door are damaged.

Therefore, if a biasing spring having a weak spring force is attached from the beginning, there arises a problem that the door cannot be raised at the beginning of the opening of the door, so that the door cannot be automatically opened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem. In a dishwasher having an automatic door opening mechanism, it is possible to reduce the impact applied to the door when the door is opened. It is the purpose.

[0008]

DISCLOSURE OF THE INVENTION The dishwasher of the present invention comprises:
A cleaning chamber formed at the top of the main body, and a door that is vertically movably supported with respect to the main body and opens and closes the cleaning chamber,
A first urging member that constantly urges the door to be pulled up and opened, and a lock mechanism that keeps the door closed, and urges the door in the opening direction only when the door starts to open. A second urging member is provided.

According to this configuration, the washing chamber formed in the upper part of the main body and the main body are supported so as to be vertically movable with respect to the main body.
In a dishwasher provided with a door that opens and closes a washing chamber, a first urging member that constantly urges the door to be pulled up and opened, and a lock mechanism that keeps the door closed, the door is opened. Since the second urging member for urging the door only in the opening direction is provided only at the beginning, after the lock mechanism is released, a relatively large force is required to open the door when the door is opened. In addition to the urging force of the member, the second urging member can urge the door in the opening direction.

Thus, the door can be opened smoothly without setting the urging force of the first urging member excessively. It is possible to improve it.

[0011]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional front view of a dishwasher 1 of the present invention, and FIG. 2 is a longitudinal sectional side view of the dishwasher 1 at a door 17. In each figure, a back plate 11 (which becomes a part of the main body 2) is provided upright at the rear of the main body 2 of the dishwasher 1. Room 3 is defined. The top, front and left and right sides of the cleaning chamber 3 are opened and closed by a box-shaped door 17.

The door 17 is supported by a guide member 20 vertically attached to both sides of the front surface of the back plate 11 so as to be movable up and down on both rear portions thereof. Then, the front and left and right sides of the cleaning chamber 3 are opened in the raised state.

A pivot fulcrum P is provided above the guide member 20.
In FIG. 1, a first opening / closing arm 27 is pivotally supported pivotally. The first opening / closing arm 27 is located inside the side surface of the door 17 and has a rear end P2 of the first opening / closing arm 27.
A first biasing member 23 made of a coil spring is connected between the base plate 11 and the back plate 11, and is attached in an extended state.

Further, a second opening / closing arm 28 is provided inside the side surface on the front side of the center of the door 17 and is pivotally supported by the door 17 at a pivotal support P3 at the lower end thereof. Usually, the engagement pin 34 of the first opening / closing arm 27 is used.
Is rotatably engaged in the second engagement portion 32 of the second opening / closing arm 28.

On the other hand, when the door 17 is closed to the main body 2, a second urging member 40 for urging the door 17 in a direction to open the door 17 is provided on the upper side inside the main body 2 which abuts on the lower end of the side plate of the door 17.
Is provided.

The second biasing member 40 includes a coil spring 41, a shaft 42, and a pusher 43, as shown in FIG.
And a mounting plate 44 and a regulating member 45 for mounting to the main body 2. The mounting plate 44 is formed of an L-shaped bracket or the like, and has one surface mounted inside the main body 2 and the other surface facing the upper surface of the main body 2. A hole is formed in the surface facing the upper surface of the main body 2, and the rod-shaped shaft 42 having a predetermined length is inserted into the hole.

At the lower end of the shaft 42 inserted into the mounting plate 44, a regulating member 45 for restricting the shaft 42 from falling out of the mounting plate 44 is mounted. I have. Further, the pusher 43 for pushing up the door 17 from below is attached to the upper end of the shaft 42 via the coil spring 41 for urging the door 17 in a direction to open the door 17 with the upper surface of the mounting plate 44. ing.

The lower end of the side surface of the door 17 in the lowered state (closed) contacts the pusher 43 of the second urging member 40.

Since the second biasing member 40 is configured as described above, when the second biasing member 40 is loaded on the upper surface of the pusher 43,
The coil spring 41 is compressed by the pusher 43, and a spring force is obtained. Then, when the load is removed, the coil spring 41 expands and pushes the pusher 43 upward. At this time, a regulating member 45 is attached to the lower end of the shaft 42 attached to the pusher 43 via an attachment plate 44.
Is provided, the urging force of the coil spring 41 is regulated by the length of the shaft 42.

On the other hand, in FIG. 2, reference numeral 36 denotes a lock mechanism attached to the upper end of the back plate 11, and a claw 37 projecting from the upper surface of the door 17 in a lowered state is provided on the upper surface thereof. The claw 37 is moved forward and backward by a solenoid provided inside the lock mechanism 36, and holds the door 17 in a closed state while moving forward (door lock).
In the retracted state, the lift of the door 17 is allowed (door lock release). Also, the upper surface of the claw 37 is inclined forward and low,
When the door 17 is lowered, the door 17 comes into contact with the inclined surface, whereby the claw 37 retreats.

Reference numeral 30 denotes a handle for manually opening and closing the door 17. The handle 30 has a U-shape as a whole including a front side and both sides, and is located outside the front surface and the left and right surfaces of the door 17. (The front side is deleted in FIG. 1). The rear end of the handle 30 is pivotally supported on the upper part of the guide member 20, and the front portions on both sides are rotatably connected to the door 17, and interlock with the vertical movement of the door 17.

On the other hand, an upper cleaning nozzle 4 having a plurality of cleaning nozzle ports for spraying cleaning water downward is provided above the cleaning chamber 3.
Is disposed rotatably, and an upper rinse nozzle 5 that rotates concentrically with the upper cleaning nozzle 4 is disposed slightly below the upper cleaning nozzle 4. This top rinse nozzle 5
Has a plurality of rinse nozzle ports for injecting rinse water downward.

A lower cleaning nozzle 6 having a plurality of cleaning nozzle ports for spraying cleaning water upward is provided at a lower portion of the cleaning chamber 3.
A lower rinsing nozzle 7 having a plurality of rinsing nozzle ports for injecting rinsing water upward is provided slightly above the lower cleaning nozzle 6 so as to be rotatable concentrically with the lower cleaning nozzle 6. Have been.

On the other hand, a booster tank 15 for storing rinse water having a high temperature of about + 80 ° C. is provided in the main body 2. This booster tank 15 and the vertical rinsing nozzle 5
7, the rinsing water stored in the booster tank 15 is supplied to the rinsing pipes 19 through the rinsing pipe 19.
A rinsing pump 16 is provided for feeding the rinsing water.
In this booster tank 15, an overflow pipe (not shown) for regulating the predetermined water level is provided upright. The rinsing water is supplied to the booster tank 15 from hot water supply means including an instantaneous water heater (hot water supply).

A cleaning tank 12 is provided below the cleaning chamber 3 and is separated from the cleaning chamber 3 by a filter (not shown). The overflow pipe 1 is provided in the washing tank 12.
3 is provided upright and opens into the cleaning tank 12 at a position where the cleaning water level of the cleaning tank 12 is regulated to a predetermined water level. Further, between the upper and lower cleaning nozzles 4 and 6 and the cleaning tank 12, the detergent stored in the cleaning tank 12 is mixed.
A cleaning pump 14 for circulating cleaning water of about 60 ° C. to upper and lower cleaning nozzles 4 and 6 via a cleaning pipe 18 is provided.

Next, the operation of the dishwasher 1 of the present invention having the above configuration will be described. Initially, the pawl 37 of the lock mechanism 36 is retracted, whereby the door 17 is pulled upward by the restoring force of the first urging member 23 as described above,
It is open. In this state, an object to be washed (not shown), such as a dish, is stored in the washing chamber 3 between the upper and lower rinse nozzles 5, 7 (the upper and lower washing nozzles 4, 6).

Then, the door 17 is pulled down and closed while the first urging member 23 is extended, the claw 37 of the lock mechanism 36 is moved forward by a switch operation or the like, and the door 17 is locked. I do. When the operation switch is turned on, the controller (not shown) starts the operation of the dishwasher 1. When the operation is started, the booster tank 1
Rinse water is supplied to the rinsing water 5 from the hot water supply means, and the rinsing pump 16 supplies the rinsing water in the booster tank 15 to the upper and lower rinsing nozzles 5 and 7 via the rinsing pipe 19 and thereafter into the washing tank 12. Will be stored.

Next, the cleaning pump 14 is operated, and the cleaning water in the cleaning tank 12 is supplied to the upper and lower cleaning nozzles 4 and 6 via the cleaning pipe 18, and the cleaning water is supplied from the respective cleaning nozzle openings into the cleaning chamber 3. By spraying, the object to be cleaned in the cleaning chamber 3 is cleaned.

After a predetermined washing time has elapsed, the rinsing pump 16 is operated, and the rinsing water in the booster tank 15 is rinsed up and down through the rinsing pipe 19 to the rinsing nozzles 5 and 7.
Are supplied into the cleaning chamber 3 from the respective rinsing nozzle openings, and the object to be cleaned in the cleaning chamber 3 is rinsed.

After such a rinsing operation has been performed for a predetermined time, the control device stops the operation and retreats the claw 37 of the lock mechanism 36 to release the lock. Thereby, the door 17 is pulled upward by the restoring force of the first urging member 23, and the restoring force of the coil spring 41 of the second urging member 40 abutting on the lower end of the door 17 is reduced by the door 17. And pushes the pusher 43 upward. At this time, since the coil spring 41 does not extend beyond the length of the shaft 42 by the regulating member 45 attached at one end to the other end of the shaft 42 to which the pusher 43 is attached, the urging force is attached to the regulating member 45. The process ends when the plate 44 abuts.

As a result, the second urging member 40 urges only in the opening direction of the door 17 in the opening direction of the door 17, so that when the door 17 is opened after the lock mechanism 36 is released, a comparison is made. At the beginning of opening which requires a great force, the door 1 is opened by the second urging member 40 in addition to the urging force of the first urging member 23.
7 can be biased in the opening direction.

Therefore, the door 17 can be opened smoothly without setting the urging force of the first urging member 23 excessively, and the impact applied to the door 17 at the time of full opening can be reduced. The durability can be improved.

As described above, the door 17 is provided with the first urging member 2.
It is automatically opened upward by the third and second urging members 40, and the user can take out the cleaned object from the cleaning chamber 3 as it is.

Although the second biasing member 40 is constituted by the coil spring 41 in the above embodiment, the present invention is not limited to this.
Can be changed as appropriate as long as it exerts an urging force only at the beginning of opening.

[0035]

As described above in detail, according to the present invention, a cleaning chamber formed in the upper part of the main body, a door for opening and closing the cleaning chamber which is supported movably in the vertical direction with respect to the main body, and raising the door In a dishwasher provided with a first urging member that constantly urges the door to open and a lock mechanism that keeps the door closed, a first urging member that urges the door in the opening direction only at the beginning of opening the door is provided. Since the second biasing member is provided, after releasing the lock mechanism,
When opening the door, which requires a relatively large force to open the door,
In addition to the urging force of the first urging member, the second urging member can urge the door in the opening direction.

Thus, the door can be smoothly opened without setting the urging force of the first urging member excessively, so that the impact applied to the door when fully opened is reduced, and the durability is improved. It is possible to improve it.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a dishwasher according to the present invention.

FIG. 2 is a vertical sectional side view of a washing room portion of the dishwasher of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dishwasher 3 Washing chamber 4 Upper washing nozzle 5 Upper rinsing nozzle 6 Lower washing nozzle 7 Lower rinsing nozzle 12 Cleaning tank 15 Booster tank 17 Door 23 First urging member 36 Lock mechanism 40 Second urging member 41 Coil spring 42 shaft 43 pusher 44 mounting plate 45 regulating member

Claims (1)

[Claims] A cleaning chamber formed at an upper portion of a main body; a door supported to be movable up and down with respect to the main body to open and close the cleaning chamber; and a door for always energizing the door to be pulled up and opened. In a dishwasher provided with one urging member and a lock mechanism that keeps the door closed, a second urging member that urges the door in the opening direction only at the start of opening the door is provided. Dishwasher characterized by that.