JPH04164427A - Dish washing machine - Google Patents

Abstract

PURPOSE:To increase the degree of freedom in the form of a dish washing machine embodied rectangularly by furnishing a rotation transmitting mechanism with which No.2 arm nozzle rotates in synchronization with No.1 arm nozzle, and arranging a washing water jet so that its rotating locus envelope draws a long circle approximately. CONSTITUTION:Washing water supplied to No.1 arm nozzle 5 is spouted aslant upward from No.1 jet 6, and the horizontal component of this reaction force of spouting rotates the No.1 arm nozzle 5 and also washes dishes on the rotational locus. Meantime the washing water in the No.1 arm nozzle 5 is pressurized and supplied to No.2 arm nozzle 7 from a water delivery hole 14 and is spouted from No.2 jets 8a, 8b, 8c, 8d. At the same time, this No.2 arm nozzle 7 moves interlockingly through a gear transmission mechanism while orbiting associate with rotation of the No.1 arm nozzle 5, and rotates round its own axis in the opposite direction. Thereby the motion locus is formed in compliance with the shape of a washing trough 1, and the dishes or the like accommodated therein 1 are washed certainly regardless of how they are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dishwasher having an arm nozzle that sprays washing water to automatically wash dishes.

2. Description of the Related Art A schematic structure of a conventional washing arm nozzle of a space-saving dishwasher in which the projected cross section of the washing tank is rectangular will be described with reference to FIG. FIG. 8 shows a longitudinal section of a dishwasher having a washing tank with a rectangular cross section. 1 is a washing tank with a rectangular cross section for storing tableware 9; 5 and 7 are rotary arm nozzles having a plurality of washing water injection ports 6 and 8, respectively, which communicate with the discharge port 3 of the washing pump 2 through a water conduit 4; are rotatably provided at both ends of the water conduit. Next, the operation of the arm nozzles 5 and 7 and the cleaning water injection ports 6 and 8 will be explained with reference to FIG. 8 and FIG. 9, which is a horizontal section of the cleaning tank. The washing water fed under pressure is jetted from the injection ports 6 and 8 and rotates the arm nozzles 5 and 7 to wash the tableware 9 in the washing tank 1. The rotation loci of the injection ports 6 and 8 at this time draw concentric circles 10 and 11, respectively, as shown in FIG.

Problems to be Solved by the Invention However, with such an arm nozzle structure, the injection rotation locus of the cleaning water injected from the injection ports 6 and 8 becomes two concentric circles 10 and 11 as shown in FIG. Therefore, in order to minimize the non-cleaning area and avoid interference during rotation of the two arm nozzles 5 and 7, the degree of freedom in the shape of the cleaning tank 1 is restricted, and the ratio of the vertical and horizontal dimensions of the cleaning tank 1 is approximately I had no choice but to make it 2:1. Further, even when the ratio is 2:1, a wide injection blind spot range 12 deviating from the rotation loci 10 and 11 of the injection ports 6 and 8 is generated near the center of the cleaning tank 1 in the vertical (longitudinal) direction. In order to eliminate the above-mentioned drawbacks, for example, in order to set the vertical and horizontal dimension ratio to 3:2, the installation of both arm nozzles 5.7 is step-wise to avoid interference during rotation of both arm nozzles 5.7.
Although such a method has been adopted, this creates wasted space in the height direction of the washing tank 1, reducing the ability to store tableware.

In view of the above-mentioned problems, the present invention aims to enable efficient cleaning with a small blind spot area of jet washing regardless of the vertical and horizontal dimension ratio of the rectangular shaped dishwasher. The purpose of the present invention is to provide a cleaning technology that can greatly improve the degree of freedom in the shape of a cleaning machine.

Means for Solving the Problems A first invention for achieving the above-mentioned object is to connect a first arm nozzle to a discharge port of a cleaning pump provided at the bottom of a cleaning tank, and to connect the first arm nozzle with the discharge port centered on the discharge port. The first arm nozzle is rotatably provided, and is provided with a first cleaning water injection port at one end and a water supply port at the other end, and a second arm nozzle communicating with the water supply port and having at least two cleaning water injection ports. A second arm nozzle is provided rotatably around the water supply port, and a rotation transmission mechanism is provided between the two arm nozzles so that the second arm nozzle rotates in synchronization with the first arm nozzle. The rotary locus envelope of the first and second cleaning water injection ports is configured to draw a substantially oval shape.

Further, the second invention provides a first arm nozzle which is connected to a discharge port of a cleaning pump provided at the bottom of the cleaning tank and is rotatable around the discharge port, and at one end of the first arm nozzle. A second arm nozzle is provided with a first cleaning water injection port and a water supply port at the other end, and is connected to the water supply port and has at least two second cleaning water injection ports, and is rotated around the water supply port. The second arm nozzle should be interlocked with the first arm nozzle (a link mechanism should be provided between both the arm nozzles to control the rotation locus envelope of the first and second cleaning water injection ports). It is constructed so that the lines draw a roughly oval shape.

In the first invention described above, the second arm nozzle revolves in accordance with the rotation of the first arm nozzle and rotates in a direction opposite to the revolution direction at a synchronous rotational speed with the first arm nozzle via the rotation transmission mechanism. By performing one rotation of the planet, which rotates on its axis, it moves parallel to the cleaning tank wall in the long horizontal direction, and as the first arm nozzle rotates, at least two second cleaning Each of the water jets rotates in a circular trajectory around both ends of the rectangular cleaning tank in the longitudinal direction, and the first cleaning water jet rotates around the center of the tank, and the rotation trajectory envelope of these cleaning water jets The line forms an approximately ellipse, and by appropriately setting the arm dimensions of the first or second arm nozzle as necessary, the shape of the approximately elliptical rotation locus envelope can be freely adjusted. Therefore, it is possible to uniformly wash tableware placed in any rectangular washing tank regardless of the vertical and horizontal dimension ratio of the washing tank.

Further, in the second invention, the second arm nozzle is moved in parallel to the longitudinal cleaning tank wall by the link mechanism according to the rotation of the first arm nozzle, and as the first arm nozzle is rotated, the second arm nozzle is moved in parallel to the washing tank wall in the longitudinal direction. At least two second cleaning water injection ports provided in the arm nozzle of the arm nozzle each cover a range at both longitudinal ends of the rectangular cleaning tank, and a first cleaning water injection port covers a central area of the cleaning tank, each forming a circular trajectory. Draw and rotate;
The rotation locus envelope of these washing water jet ports forms a substantially elliptical shape, and the tableware placed in the washing tank can be uniformly washed.

EXAMPLE Below, the first example of the present invention will be described with reference to FIG. 1, FIG.
This will be explained with reference to FIG. In the figure, tableware 1
A first arm nozzle is connected to a nozzle bearing 4 which communicates with the discharge port 3 of the cleaning pump 2, which is provided approximately at the center of the inner bottom of the cleaning tank 1 having a rectangular cross section and which houses the cleaning pump 2, and which is rotatably connected to the nozzle bearing 4 fixed thereto. 5 is set. Further, at least one injection port 6 for spraying cleaning water diagonally upward is provided at the upper end of one arm of the first arm nozzle 5, and a water supply port 14 is provided at the end of the other arm. 14, a second arm nozzle 7 is provided rotatably around the rotation axis O, and injection ports 8a, 8b, 8c, and 8d are provided on both upper arm portions of the second arm nozzle 7. There is. Further, a first gear 9 is fixed to the nozzle bearing 4, and the first arm nozzle 5 has a second gear 10 rotatably provided around a fixed shaft 15 formed on a part of the lower surface of the arm. The second gear 10 is configured to perform planetary rotational motion relative to the first gear 9 as the first arm nozzle 5 rotates. Further, a third gear 11 that rotates in synchronization with the second gear 10 is fixed to a rotating shaft O fixed to the second arm nozzle 7, and this second arm nozzle 7 rotates together with the third gear 11. is configured to do so. That is, the second arm nozzle 7 performs a planetary rotational motion via the second gear 10 with respect to the first gear 9 fixed to the nozzle bearing 4 in conjunction with the rotation of the first arm nozzle 5. . Further, the pitch circle diameter of the first gear 9 is formed to be equal to the pitch circle diameter of the second gear 10 and the third gear 11, and the second arm nozzle 7 is synchronized with the rotation of the first arm nozzle 5. It rotates at a speed opposite to the direction of revolution. These gears 9 to 11 constitute a rotation transmission mechanism. This rotation transmission mechanism can also be configured by other than gears.

The operation of the above configuration will be explained below. When the tableware 12 is placed in the tableware basket 13 in the washing tank 1 and operation is started, a predetermined amount of washing water is supplied into the washing tank 1, and then the washing pump 2 is activated and pressurized washing water is discharged. It is pressurized and supplied from the outlet 3 to the first arm nozzle 5 . The cleaning water supplied to the first arm nozzle 5 is injected diagonally upward from the first injection port 6, and the horizontal component of this injection reaction force causes the arm nozzle 5 to rotate, for example, clockwise, and on the rotation trajectory. Wash tableware. On the other hand, the cleaning water in the first arm nozzle 5 is transferred from the water supply port 14 to the second arm nozzle 7.
is supplied under pressure to the second injection ports 8a, 8b, 8c.
, 8d. At the same time, the second arm nozzle 7 revolves in accordance with the rotation of the first arm nozzle 5 and is interlocked with the gear transmission mechanism to rotate in the opposite direction to the revolution direction at a synchronous rotation speed with the first arm nozzle 5. Performs planetary rotation motion. Here, the rotation of the second arm nozzle 7 is offset by the revolution rotating synchronously in the opposite direction, and apparently,
The second arm nozzle 7 revolves while remaining parallel to both ends of the cleaning tank 1 in the longitudinal direction. At this time, the second injection ports 8a, 8c and 8b provided in the second arm nozzle 7,
8d represents the range on both sides of the rectangular cleaning tank 1 from the center in the longitudinal direction, and the first injection port 6 represents the range at the center of the cleaning tank l.
Each rotates in a circular trajectory.

FIG. 7 shows the rotation trajectory 15 of the first injection port 6 and the rotation trajectory 16, 17, 18, 19 of each of the second injection ports 8a, 8c, 8b, and 8d during the above operation on the rotation plane of the injection port. This is what is illustrated above. In the figure, the rotation locus of each of the injection ports is a circle, and these circles are lined up in parallel to the longitudinal direction of the cleaning tank 1, and the envelope when these rotation loci are overlapped is approximately oval as shown in the figure. A motion locus corresponding to the shape of the cleaning tank 1 is formed. In addition, since the circular rotation trajectory of each injection port is formed within the range of the above-mentioned rotation trajectory envelope as shown in the figure, when the washing water is sprayed, the tableware stored in the washing tank 1 is Cleaned reliably regardless of the condition. Furthermore, in the above configuration, by setting the revolution radius of the arm nozzle 7 and the arm length of the arm nozzle 7 itself to appropriate length dimensions as necessary, the rotation trajectory envelope of the injection port is formed as required. Since the oval shape can be freely set, it can be applied regardless of the aspect ratio of the cleaning tank 1.

Next, a second embodiment of the present invention will be described with reference to FIGS. 4, 5, and 6. In the figure, a first arm nozzle 5 is provided at the discharge port 3 of the cleaning pump in communication with the discharge port 3 and rotatably connected to a nozzle bearing 4 fixed thereto. Further, at least one injection port 6 for spraying cleaning water diagonally upward is provided at the upper end of one arm of the first arm nozzle 5, and a water supply port 14 is provided at the end of the other arm. A second arm nozzle 7 is rotatably provided in communication with the second arm nozzle 7, and injection ports 8a, 8b, 8c, and 8d are provided on both upper arm portions of the second arm nozzle 7.

4 and 5, a fixed arm 9 having a shaft 11 at its tip is fixed to the nozzle bearing 4, passing through the center of rotation of the arm nozzle 5. As shown in FIGS. Further, a link 10 is provided parallel to the arm nozzle 5, having one end rotatably engaged with the shaft 11 and the other end rotatably coupled to a shaft 12 provided at one end of the arm nozzle 7. The fixed arm 9
The link 10 forms a four-joint parallel link mechanism in which the arm nozzle 7 always moves parallel to the fixed arm 9 regardless of the rotation angle of the arm nozzle 5.

The operation of the above configuration will be explained below. When the cleaning pump operates and pressurized cleaning water is supplied to the first arm nozzle 5, the cleaning water is jetted obliquely upward from the first injection port 6. This jet reaction force rotates the arm nozzle 5, for example, counterclockwise, and washes the tableware on the rotational trajectory. On the other hand, the cleaning water is also pressurized and supplied from the water supply port 14 to the second arm nozzle 7, and is further injected from the second injection ports 8a, 8b, 8c, and 8d. The mechanism rotates in parallel with the rotation of the first arm nozzle 5.

FIG. 6 shows the moving position and direction of the arm nozzle 7, which is linked to the arm nozzle 5 by the parallel link mechanism, when the arm nozzle 5 has rotated about 1/8 from the position shown in FIG. This shows that the arm nozzle 5 always revolves while maintaining parallelism regardless of the rotation angle.

Due to the above-described operation of both arm nozzles, the rotation locus of the first injection port 6 and the second injection port 8a are changed as shown in FIG.
, 8c, 8b, and 8d each have a rotation locus of 15
．． It is drawn by the trajectory of 16, 17, 18, and 19. In the figure, the rotation locus of each of the injection ports is a circle, and these circles are lined up in parallel to the longitudinal direction of the cleaning tank 1, and the envelope when these rotation loci are overlapped is approximately oval as shown in the figure. A motion locus corresponding to the shape of the cleaning tank 1 is formed. In addition, since the circular rotation trajectory of each injection port is formed in the inner range of the above rotation trajectory envelope as shown in the figure, the tableware stored in the washing tank 1 is be sure to be cleaned. Furthermore, in the above configuration, by setting the revolution radius of the arm nozzle 7 and the arm length of the arm nozzle 7 itself to appropriate length dimensions as necessary,
Since the desired oval shape formed by the rotation locus envelope of the injection port can be freely set, it can be applied regardless of the aspect ratio of the cleaning tank.

Effects of the Invention As is clear from the above embodiments, according to the present invention, by rotating two arm nozzles synchronously,
Regardless of the vertical and horizontal dimension ratio of the rectangular washing tank, it is possible to efficiently wash the dishes in the washing tank with fewer blind spots, and to save space without reducing washing efficiency or tableware storage efficiency. The present invention provides a cleaning technology that can greatly improve the degree of freedom in the projected cross-sectional shape of a rectangular dishwasher.

Further, according to the present invention, the same effect as above is obtained by interlocking the two arm nozzles with a link mechanism, and in this case, the structure is simple and very advantageous in terms of structure. Become.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a dishwasher according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of the arm nozzle configuration of the same dishwasher, FIG. 3 is a plan view of the same, and FIG. An enlarged sectional view of the arm nozzle configuration in the second embodiment, FIG. 5 is a plan view of the same arm nozzle configuration, FIG. 6 is a diagram of the same rotational operation, and FIG. 7 is an arm nozzle in the first and second embodiments. FIG. 8 is a longitudinal sectional view of a conventional dishwasher, and FIG. 9 is a rotation trajectory diagram of the arm nozzle jet during rotational operation. 1...Cleaning tank, 5...First arm nozzle, 6...
・First cleaning water injection port, 7... second arm nozzle,
8a, 8c, 8b, 8d...second cleaning water injection port, 1
5...Rotation locus of first cleaning water injection port, 16.17.
18.19... Rotation trajectory of the second cleaning water injection port. Name of agent: Patent attorney Haruaki Koebi (2 persons) Figure 1 Figure 2ryJ Figure 7

Claims (2)

[Claims] (1) A first arm nozzle is provided rotatably around the discharge port in communication with the discharge port of the cleaning pump provided at the bottom of the cleaning tank, and a first arm nozzle is provided at one end of the first arm nozzle. A cleaning water injection port is provided at the other end, a water supply port is provided at the other end, and a second arm nozzle communicating with the water supply port and having at least two second cleaning water injection ports is provided rotatably around the water supply port. In addition, a rotation transmission mechanism is provided between the two arm nozzles so that the second arm nozzle rotates in synchronization with the first arm nozzle, and the rotation locus envelope of the first and second cleaning water injection ports is A dishwasher configured so that the lines draw a roughly oval shape. (2) A first arm nozzle is provided in communication with the discharge port of the cleaning pump provided at the bottom of the cleaning tank and is rotatable around the discharge port, and a first arm nozzle is provided at one end of the first arm nozzle. A cleaning water injection port is provided at the other end, a water supply port is provided at the other end, and a second arm nozzle communicating with the water supply port and having at least two second cleaning water injection ports is provided rotatably around the water supply port. In addition, a link mechanism is provided between the two arm nozzles so as to interlock the second arm nozzle with the first arm nozzle, and the rotation locus envelope of the first and second cleaning water injection ports is approximately long. A dishwasher configured in a circular pattern.