JPS62299232A - Tableware washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a dishwasher that washes dishes and the like by jetting washing water.

2. Description of the Related Art A commonly used dishwasher of this kind is shown in FIG. In Figure 4, 1 is the tableware, 2 is the washing tank,
3 is a cleaning nozzle, 4 is a cleaning pump, 6 is a discharge pipe that sends cleaning water to the cleaning nozzle 3, and 6 is a nozzle bearing that supports the cleaning nozzle 3. 7 is a filter that collects leftovers (contaminants attached to dishes etc. are called leftovers); 8 is a drainage pump;
9 and 10 are a water supply pipe and a drain pipe for washing water. Furthermore, the fifth
As shown in the figure, the cleaning nozzle 3 and the nozzle shaft 1 can be attached and detached.
1, this nozzle shaft 11 holds the cleaning nozzle 3 by fitting a cap 13 to the threaded part 12 at the top,
It is rotatably supported by a nozzle bearing 6. 14 is a ring with a low coefficient of friction provided between the nozzle shaft 11 and the nozzle bearing 6.

In the dishwasher configured in this manner, leftover dishes such as tableware are washed off by jetting the washing water supplied through the water supply pipe 9 from the washing nozzle 3 by the washing pump 4. The operation of the cleaning nozzle 3 and nozzle shaft 11 during this process will be explained. As shown in FIG.
1 and the cleaning nozzle 3 float together by a length al in the direction of arrow B, and the ring 14 comes into close contact with the inner surface of the nozzle bearing 6. Washing water is sent into the washing nozzle 3 and is sprayed onto the dishes etc. from the opening on the top surface.

The cleaning nozzle 3 has an opening (not shown) that sprays cleaning water laterally, and obtains rotational driving force as a reaction force of the spraying. The force to push up the nozzle shaft 11 is the static pressure and dynamic pressure of the cleaning water multiplied by the projected area of the nozzle shaft 110, and the force to push it down is the upward jet of cleaning water from the cleaning nozzle 3. Although the reaction force is mentioned, the push-up force due to static pressure and dynamic pressure is larger, and the nozzle shaft 11 moves the ring 14 to the nozzle bearing 6.
The press rotates while maintaining watertightness. therefore,
There is almost no leakage loss of cleaning water from the rotating portion of the nozzle shaft 11, and cleaning is performed very efficiently with almost no loss of discharge flow rate or pressure of the cleaning pump 4.

The cleaning water is filtered to remove leftovers through a filter 7, and then sent to a cleaning pump 4.
However, after a predetermined period of time, the cleaning pump 4 completely stops and the water is drained out of the cleaning tank 2 by the drainage pump 8.

During this drainage process, the nozzle shaft 11 is stopped at the upper end of the discharge pipe 5. Subsequently, the process of rinsing the dishes, etc. with the freshly supplied washing water is added three times to complete the entire process.

Problems to be Solved by the Invention However, the above configuration has a problem in that the nozzle shaft 11 and the cleaning nozzle 3 cannot be easily attached and detached. First, when assembling the product, in order to attach the nozzle shaft 11 and the cleaning nozzle 3, etc., place the nozzle shaft 11 and the ring 14 on the upper end of the discharge pipe 6, and set the nozzle shaft 11 and the ring 14 on the discharge pipe so that the nozzle bearing 6 is formed in the gap e1 with the ring 14. 5, then when the cleaning nozzle 3 is attached to the nozzle shaft 11 and tightened with the cap 13, the cap 13 becomes idle together with the nozzle shaft 11 due to friction at the threaded portion 12 between the cap 13 and the nozzle shaft 11. It cannot be tightened. Therefore, in reality, the nozzle shaft 11 and ring 14 are inserted into the nozzle bearing 6, the rotation of the nozzle shaft 11 is fixed with a jig, the cleaning nozzle 3 is tightened with the cap 13, and finally the nozzle bearing 6 is inserted into the discharge pipe 6. It requires work to install it. Similar problems arise when the user disassembles the nozzle shaft 11 and the cleaning nozzle 3 to prevent clogging of the cleaning nozzle or to replace parts. Therefore, in the conventional configuration of the nozzle shaft 11, the cleaning nozzle 3
It takes a lot of time to attach and detach the product, and also at the product assembly and production site.
This made it difficult to use even for general users.

In order to make it easy to attach and detach such a cleaning nozzle,
There is one constructed of a cleaning nozzle 15 and a nozzle bearing 16 as shown in FIG. In this case, the conventional nozzle shaft 1
1 and the nozzle bearing 6 are integrated, and the cleaning nozzle 16 can be easily attached and detached by simply tightening the cap 17. However, according to this method, a part of the cleaning water leaks from the gap between the cleaning nozzle 15 and the nozzle bearing 16, which are provided to maintain the rotation of the cleaning nozzle 16, as shown by arrow C in the figure, so it is disadvantageous in terms of cleaning efficiency. It is something that has.

The present invention solves these problems, and aims to provide a dishwasher that is easy to attach and detach a washing nozzle, is easy to use, and has high cleaning efficiency.

Means to Solve All Problems In order to solve the above problems, the dishwasher of the present invention is provided with a nozzle shaft that is detachably attached to the washing nozzle and that floats together with the washing nozzle when the washing pump is operating. The shaft is provided with a rotationally engaging part between the shaft and the discharge pipe from the cleaning pump or the nozzle bearing when the cleaning pump is stopped.

Effect: With the above configuration, the nozzle shaft is locked in the rotational direction with respect to the discharge pipe or nozzle bearing when the cleaning pump is stopped, so the nozzle shaft and cap do not rotate together when removing the camp that tightens the cleaning nozzle. , disassembled into cleaning nozzle and nozzle shaft.

On the other hand, the same holds true during assembly. In addition, during the cleaning process, the nozzle shaft and the cleaning nozzle locking part floats up and is disengaged, so the nozzle shaft and the cleaning nozzle can rotate normally, and the nozzle shaft is connected to the nozzle bearing through the ring. It is possible to maintain watertight contact with the rotating parts, and almost no loss of cleaning water leaks from the rotating parts. 1 shows a vertical sectional view and a perspective view of main parts of a dishwasher according to a first embodiment of the invention. FIG. In Figures 1 and 2, 18 is a washing tank, 19
2o is a cleaning nozzle, and 2o is a cleaning nozzle 19 that supplies cleaning water, which is provided integrally with a cleaning pump (not shown because it is the same as the conventional one).
21 is a nozzle bearing that supports the cleaning nozzle 19, 22 is a nozzle shaft that can be attached to and detached from the cleaning nozzle 19, and is rotatably supported by the nozzle bearing 21. 24
26 is a cap attached to the nozzle shaft 22 through the fully threaded portion 23 of the cleaning nozzle 19, and 26 is a ring provided between the nozzle shaft 22 and the nozzle bearing 21. Furthermore, when the cleaning pump is stopped, the lower surface of the nozzle shaft 22 comes into contact with the upper surface of the discharge pipe 20, and the recess 26 provided on the lower surface of the nozzle shaft 22 and the protrusion 27 provided on the upper surface of the discharge pipe fit together. and the convex part 2
The height of 7 is 62, and the ring 26 and nozzle receiver 26 at this time
The zero clearance, that is, the height at which the nozzle shaft 22 can float is e5, and the relationship between e2 and 63 is 12</I5, which constitutes a locking portion between the nozzle shaft 22 and the discharge pipe 20 in the rotational direction. The concave portion 26 and the convex portion 27 in this engaging portion may be arranged in opposite directions. Note that the tableware, drain pump, filter, etc. in this embodiment have the same structure as in the conventional example, and therefore their explanation will be omitted.

In the above configuration, the operation of attaching and detaching the cleaning nozzle 19 and the nozzle shaft 22 will be explained. At the product assembly and production site, the nozzle shaft 22 on which the ring 25 is mounted is placed on the upper surface of the discharge pipe 20, and the nozzle bearing 21 is attached to a predetermined position by screw fitting. At this time, the recess 2 of the nozzle shaft 22
6 fits into the convex portion 27 of the discharge pipe 20, the ring 2
The gap between the nozzle receiver 6 and the nozzle receiver 21 is e3. Subsequently, the cleaning nozzle 19 is attached to the nozzle shaft 22, and the cap 24 is tightened. The tightening of the cap 24 may sometimes occur even if the nozzle shaft 22 initially spins idly together with the cap 24.
As soon as the convex portion 6 and the convex portion 27 are fitted together, the nozzle shaft 22 is engaged with the discharge pipe 20, and the cleaning nozzle 19 can be easily attached with the cap 24. On the other hand, even when the cleaning nozzle 19 is removed, the nozzle shaft 22 is locked to the discharge pipe 20 in the rotational direction so that it does not rotate idly, so that the cap 24 can be easily removed from the threaded portion 23.

Next, the operation will be explained in terms of cleaning efficiency. When the cleaning pump operates, cleaning water flows from the discharge pipe 20 to the nozzle shaft 2.
2 and is discharged to the cleaning nozzle 19.
It is sprayed onto dishes etc. from the opening to wash away leftover food. The nozzle shaft 22 and the cleaning nozzle 19 float by a height of 11!3 due to the static pressure and dynamic pressure of the cleaning water, while the convex portion 27 at the fitting part of the nozzle shaft 22 and the discharge pipe 20 has a height of 42. The fitting is released, and the nozzle shaft 22 and the cleaning nozzle 19 become rotatable relative to the nozzle bearing 21. Moreover, the nozzle shaft 2
2 is in close contact with the nozzle bearing 21 via the ring 25, and there is almost no leakage loss of cleaning water from the rotating parts, resulting in high cleaning efficiency.

FIG. 3 shows a longitudinal cross-section of essential parts of the dishwasher according to the embodiment of the present invention shown in FIG. In FIG. 3, 27 is a cleaning tank, 28 is a cleaning nozzle, 29 is a discharge pipe that sends cleaning water to the cleaning nozzle 28, 30 is a nozzle bearing that supports the cleaning nozzle 28, and 31 is a nozzle shaft that can be attached to and detached from the cleaning nozzle 28. , 32 is a ring provided between the nozzle shaft 31 and the nozzle receiver 30. In addition, the lower surface of the nozzle shaft 31 and the discharge pipe 2
On the upper surface of the nozzle shaft 9, a locking portion of a concave and convex portion is provided as in the first embodiment, the height of the convex portion is a4, the height at which the nozzle shaft 31 can float is 45, and ea<7! It is in the relationship of s. In this embodiment, a portion corresponding to the cap 24 in the first embodiment is provided integrally with the cleaning nozzle 28, and the nozzle shaft 31 and the cleaning nozzle 28 are fastened together via a threaded portion 33. Note that the tableware, drain pump, filter, etc. in this embodiment have the same structure as in the conventional example, so explanations thereof will be omitted.

In the above configuration, the operation of attaching and detaching the cleaning nozzle 28 and nozzle shaft 31 will be described with respect to the differences from the first embodiment. In this embodiment, the cleaning nozzle 28 can be attached and detached by simply rotating the cleaning nozzle 28. Moreover, during cleaning, the nozzle shaft 31 floats up and is unlocked from the discharge pipe 29 in the rotational direction, and there is almost no leakage loss of cleaning water, resulting in high cleaning efficiency, which is the same as in the first embodiment. The same is true.

In the first and second embodiments described above, a locking part in the rotational direction of the nozzle shaft and the discharge pipe was provided when attaching and detaching the cleaning nozzle.
A locking part between the nozzle shaft 22.31 and the nozzle bearing 21.30? The same operation and effect can be obtained even if it is formed.

As described in detail, according to the present invention, there is provided a nozzle shaft that floats together with the cleaning nozzle, and when the cleaning pump is stopped, the nozzle shaft has an engaging part in the rotational direction between it and the discharge pipe or the nozzle bearing. This makes it easy to attach and detach the cleaning nozzle, increasing the efficiency of product assembly, and making it easy for general users to clean up clogged fishing nozzles and replace parts. . Furthermore, during cleaning, the floating part of the nozzle shaft disengages the locking part in the rotational direction, and the gap between the nozzle bearing and the nozzle bearing is kept watertight, so there is almost no leakage loss of cleaning water, and the cleaning efficiency is very high. A full range of dishwashers can be provided.

[Brief Description of the Drawings] Figures 3 and 3 are longitudinal sectional views of main parts of a dishwasher according to the second embodiment, and Figs. 4 and 5 are longitudinal sectional views and longitudinal sectional views of main parts of a conventional dishwasher, respectively. 6 are longitudinal sectional views of main parts of another conventional dishwasher. 20...Discharge pipe, 21...Nozzle bearing, 22...Nozzle shaft, 26.27...
Locking part (concavity, protrusion) 0 Name of agent Patent attorney Toshio Nakao and 1 other person Figure 1 Figure 2 Figure 5 Nonu 9 axis Figure 6

Claims (1)

[Claims] A discharge pipe that sends cleaning water to a cleaning nozzle in a cleaning tank, a nozzle shaft that is detachably attached to the cleaning nozzle and floats together with the cleaning nozzle when the cleaning pump is operated, and a rotatable support for the nozzle shaft. and a nozzle bearing, wherein the nozzle shaft is provided with a locking part in a rotational direction between the discharge pipe or the nozzle bearing when the washing pump is stopped.