JP2000325286A - Tableware washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always assure the detergency of tableware by inexpensively maintaining the rotation of a washing nozzle in a stabile state in a tableware washing machine which executes the washing of the tableware. SOLUTION: The washing nozzle 17 is freely rotatably disposed within a washing tank and the rotation center part of the washing nozzle 17 is provided with a shaft part 18 for guiding washing water into the washing nozzle 17. A pivotal supporting part 19 enclosing a shaft part 18 so as to freely turnable support the shaft part is disposed. The outer peripheral surface of the shaft part 18 is provided with at least two rotary guide parts 21 of a rugged shape having the front ends approximate to the inner peripheral surface of the pivotal supporting part 19 in an axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes.

[0002]

2. Description of the Related Art Conventionally, this type of dishwasher has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 3, a dishwasher body 1 is
A washing tank 2 is provided inside, and water or hot water is supplied into the washing tank 2 by a water supply valve 3. At the time of driving, the cleaning water is attached to a pump chamber communicating with the other side of the drain hole 4 and circulates inside the cleaning tank 2 by a cleaning pump 6 driven by a motor 5. That is,
In this circulation, the washing water is sucked into the washing pump 6 from the drain hole 4 and supplied to the washing nozzle 7 rotatably provided at the inner bottom of the washing tank 2 from the washing pump 6, and is jetted from the washing nozzle 7 to wash the dishes. And then return to the drain hole 4 again.

A heater 8 for heating cleaning water is provided between the cleaning nozzle 7 and the bottom of the cleaning tank 2. In addition, a tableware basket 10 is arranged above the washing nozzle 7 so that the tableware 9 can be arranged neatly and the washing water is effectively sprayed on the tableware 9.

[0005] A door 11 that can be opened and closed is attached to the front of the washing tank 2. A plurality of moving rollers are arranged in the dish basket 10, and the upper part of the open door 11 can be pulled out to the front outside of the dishwasher main body 1. The drainage pump 12 discharges washing water to the outside through the drainage hose 13.

Here, the structure of the cleaning nozzle 7 will be described. As shown in FIG. 4, the cleaning nozzle 7 is provided with a shaft portion 14 for guiding cleaning water into the cleaning nozzle 7 at the rotation center thereof, and a cleaning tank. At the bottom of the shaft 2, a shaft support 15 for supporting the shaft 14 of the cleaning nozzle 7 is arranged so as to be encased with the shaft 14, and the shaft 14 of the cleaning nozzle 7 is inserted into the shaft support 15 to freely rotate the cleaning nozzle 7. I support it. Further, a claw portion 16 is provided near the shaft portion 14 of the cleaning nozzle 7 so that the cleaning nozzle 7 does not easily come off the shaft support portion 15.

The washing nozzle 7 is supplied with washing water from the washing pump 6 and injects the washing water to wash the dishes 9. Further, the cleaning nozzle 7 rotates around the shaft support 15 by injecting the cleaning water and the injection reaction force. Further, the injection reaction force is used to maintain the balance of the cleaning nozzle 7 also in the vertical direction.

The lower surface of the shaft 14 of the cleaning nozzle 7
The sliding surface slides between the abutting surface of the shaft support portion 15, and the sliding surface prevents the cleaning water from escaping from the space between the shaft portion 14 and the shaft support portion 15 of the cleaning nozzle 7 to the cleaning tank 2, Most of the washing water supplied from the washing pump 6 is fed into the washing nozzle 7, and can be effectively used for washing the dishes 9 without lowering the jet pressure of the washing nozzle 7.

Regarding the relationship between the shaft 14 and the shaft support 15 of the cleaning nozzle 7, in order to stably rotate the cleaning nozzle 7, the inner surface of the shaft support 15 is provided at two places above and below the outer periphery of the shaft 14 of the cleaning nozzle 7. A rotation guide portion (ring-shaped portion) 14a is provided which engages with the cylindrical portion and reduces the gap.
Due to this relationship, even when the washing nozzle 7 is inclined, the inclination of the washing nozzle 7 is reduced to prevent the washing nozzle 7 from coming into contact with the washing tank 2 and the dish basket 10, and that the washing nozzle 7 is prevented from rotating when the washing nozzle 7 rotates. Preventing.

The intermediate space between the upper and lower rotation guides 14a is increased because food waste or the like enters between the shaft 14 and the shaft support 15 of the washing nozzle 7. When the small gap is left for a long distance, the gap is clogged during this time and hinders the rotation of the cleaning nozzle 7, so that the small gap is kept only for a short distance of the rotation guide portion 14a to prevent the rotation of the cleaning nozzle 7 from being hindered. This is to prevent it.

[0011]

However, in such a conventional configuration, when the balance of the cleaning nozzle 7 is once lost and the cleaning nozzle 7 is inclined, the cleaning water is supplied between the shaft 14 and the shaft support 15 of the cleaning nozzle 7. invade. At this time, the cleaning pump 6 is provided below the rotation guide portion 14a of the shaft portion 14 of the cleaning nozzle 7.
Pressure will be applied. Therefore, at this point, the upward force on the cleaning nozzle 7 is increased, and the above-described vertical force balance of the cleaning nozzle 7 is lost, and the cleaning nozzle 7 rotates in a floating state.

In this case, a gap is formed between the lower surface of the shaft portion 14 of the cleaning nozzle 7 and the contact surface of the shaft support portion 15, and the space between the shaft portion 14 and the shaft support portion 15 of the cleaning nozzle 7 enters the cleaning tank 2. The washing water always escapes, and the washing nozzle 7
Has a problem in that the jet pressure decreases, and the normal cleaning of the tableware 9 cannot be performed.

On the other hand, there is a measure to increase the weight of the cleaning nozzle 7, but the upward force generated here is considerably larger than the weight of the cleaning nozzle 7, and requires a considerable weight. The cost of the weight and its mounting is costly and disadvantageous.

The present invention solves the above-mentioned conventional problems, and maintains the rotation of the cleaning nozzle in a stable state at low cost.
The aim is to always ensure the cleaning power of dishes.

[0015]

According to the present invention, in order to achieve the above object, a cleaning nozzle is rotatably disposed in a cleaning tank, and cleaning water is guided into the cleaning nozzle at the center of rotation of the cleaning nozzle. A shaft support portion is provided, and a shaft support portion is provided so as to rotatably support the shaft portion, and the outer peripheral surface of the shaft portion has a concavo-convex rotation guide whose tip is close to the inner peripheral surface of the shaft support portion. At least two parts are provided in the axial direction.

Thus, the rotation of the washing nozzle can be kept in a stable state at low cost, and the washing power of the tableware can be always secured.

[0017]

According to the first aspect of the present invention, a cleaning nozzle is rotatably disposed in a cleaning tank, and cleaning water is guided into the cleaning nozzle at a rotation center of the cleaning nozzle. A shaft portion is provided, and a shaft support portion is provided so as to rotatably support the shaft portion. An irregular rotation guide having a tip close to an inner circumferential surface of the shaft support portion is provided on an outer peripheral surface of the shaft portion. Since at least two portions are provided in the axial direction, the rotation of the washing nozzle can be kept in a stable state at low cost, and the washing power of the dishes can be always secured.

[0018]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 2, the washing nozzle 17 is rotatably provided at the inner bottom of the washing tank 2 and sprays washing water supplied from the washing pump 6 to wash the dishes 9. As shown in FIG. 1, the cleaning nozzle 17 is provided with a shaft portion 18 for guiding cleaning water into the cleaning nozzle 17 at the center of rotation, and encloses the shaft portion 18 of the cleaning nozzle 17 at the bottom of the cleaning tank 2. Thus, the shaft support 19 is provided, and the shaft 18 of the cleaning nozzle 17 is inserted into the shaft support 19 to rotatably support the cleaning nozzle 17. The shaft 18 of the cleaning nozzle 17
Is provided near the shaft, and the cleaning nozzle 17 is
It does not come off easily.

On the outer peripheral surface of the shaft portion 18 of the cleaning nozzle 17, two rotation guide portions 21 are provided in the axial direction. The rotation guide 21 has a plurality of uneven rib shapes. The tip of the rib-shaped convex portion 21 a of the rotation guide portion 21 is close to the inner peripheral surface of the shaft support portion 19, and the distance between the distal end of the convex portion 21 a and the inner peripheral surface of the shaft support portion 19 is reduced. Also,
The base of the convex portion 21a is a portion 18 where the rotation guide portion 21 is not provided.
As in the case of a, the distance from the inner peripheral surface of the shaft support 19 is increased.

The operation of the above construction will be described. Even when the cleaning nozzle 17 is tilted and the cleaning water intrudes from the sliding surfaces of the shaft 18 and the shaft support 19 of the cleaning nozzle 17, the cleaning water that has entered is rotated. Convex part 2 forming guide part 21
1a and the portion 18a without the rotation guide portion 21 and are discharged to the cleaning tank 2, so that the cleaning nozzle 1a
There is almost no increase in the pressure between the shaft 18 and the shaft support 19 of FIG. Therefore, unlike the conventional example, an upward load due to the pressure applied to the lower side of the conventional rotation guide portion 14a does not occur.

For this reason, even if the cleaning nozzle 17 is once tilted, the original vertical balance is maintained, so that the sliding surface of the shaft 18 and the shaft support 19 of the cleaning nozzle 17 abuts immediately,
The flow of the washing water from here to the washing tank 2 is suppressed. Therefore, most of the cleaning water supplied from the cleaning pump 6 is sent into the cleaning nozzle 17 and can be effectively used for cleaning the tableware 9 without lowering the injection pressure of the cleaning nozzle 17.

Further, even when food scraps or the like enter the sliding surface between the shaft portion 18 and the shaft support portion 19 of the cleaning nozzle 17, the food waste passes through the root portion of the rotation guide portion 21 and the portion 18a without the rotation guide portion 21. Then, the cleaning nozzle 2 is discharged to the cleaning tank 2, so that the cleaning nozzle 17 is held between the shaft portion 18 and the shaft support portion 19 of the cleaning nozzle 17,
The rotation of the cleaning nozzle 17 is not hindered.

As described above, the rotation of the washing nozzle 17 can be kept in a stable state at low cost, and the washing power of the tableware 9 can be always secured.

[0025]

As described above, according to the first aspect of the present invention, the cleaning nozzle is rotatably disposed in the cleaning tank, and the cleaning nozzle is disposed at the rotation center of the cleaning nozzle. A shaft portion for guiding the water is provided, and a shaft support portion is provided so as to rotatably support the shaft portion. The outer peripheral surface of the shaft portion has an uneven surface whose tip is close to the inner peripheral surface of the shaft support portion. Since at least two rotary guides are provided in the axial direction, the rotation of the washing nozzle can be kept in a stable state at low cost, and the washing power of the dishes can be always secured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a partially cut-away main part of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the dishwasher.

FIG. 3 is a longitudinal sectional view of a conventional dishwasher.

FIG. 4 is an enlarged sectional view of a main part of the dishwasher.

[Explanation of symbols]

 2 Cleaning tank 17 Cleaning nozzle 18 Shaft 19 Shaft support 21 Rotation guide

Claims (1)

[Claims] A cleaning nozzle is rotatably disposed in a cleaning tank, and a shaft for guiding cleaning water in the cleaning nozzle is provided at a rotation center portion of the cleaning nozzle, and the shaft is rotatably mounted on the shaft. A dishwasher, comprising: a shaft support portion which is provided so as to be supported; and at least two uneven rotation guide portions whose front ends are close to the inner circumferential surface of the shaft support portion on the outer peripheral surface of the shaft portion.