JPH0328858Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to dishwashers mainly used for commercial purposes. This invention relates to measures for controlling the rotational deflection of the arms in a rotary injection type in which the arms are rotated in a coaxial position by the reaction force of the injection pressure.

(Conventional technology) Restaurants and cafeterias that handle a large number of dishes have traditionally installed dishwashers that automatically wash dishes to meet the need to quickly wash dirty dishes and improve their usage efficiency. May be introduced. As an example of such a dishwasher, the washing arm and the rinsing arm, which spray washing liquid and rinsing liquid onto the dishes, are coaxially rotatable, and each liquid is sprayed by the reaction force of the spraying pressure while rotating each arm. A rotary spray type is known that increases the cleaning and rinsing effects on dishes by spraying them.

By the way, in this type of rotary injection type dishwasher, the washing arm and the rinsing arm are rotatably supported concentrically with each other on an arm support device, and the washing liquid supply system and the rinsing liquid supply system in the arm support device are connected to each other. In the case of an integrated structure, conventionally, for example, as shown in _FIG .
Connect the bottomed cylindrical rinsing pipe b in which b ₁ is formed to the main body a.
The bottom part is welded to the bottom of the main body a, and the rinsing liquid supply pipe C passing through the main body a is screwed into the rinsing liquid inlet _b1 of the rinsing pipe b to make it liquid-tight. At the same time, the penetration part of the main body a of the rinsing liquid supply pipe C is liquid-tightly welded, the washing arm seat d is fitted into the washing arm seat mounting hole a ₂ of the main body a, and the end of the rinsing pipe b is welded. A washing arm fixing seat e is fixed to the washing arm fixing seat e, and the washing arm f is rotatably supported between the washing arm receiving seat d and the washing arm fixing seat e, while the rinsing arm g is rotatably supported in the rinsing pipe b. The rinsing arm g is rotatably supported by fitting the shaft g ₁ so that it cannot be pulled out, and the rinsing arm f is passed from the cleaning liquid inlet a ₁ to the rinsing pipe b in the bearing device body a.
The path from the rinsing liquid supply pipe C to the inside of the rinsing pipe b is defined as the cleaning liquid flow path h, and from the rinsing liquid supply pipe C to the rinsing arm g
A structure in which the path leading to the rinsing liquid flow path i is generally adopted.

(Problem to be solved by the invention) However, in this conventional structure, the bearing device body a
By welding the bottom of the rinsing pipe b that is inserted into the bearing device body a to the bottom of the bearing device body a, and by welding the rinsing liquid supply pipe C connected to the rinsing liquid inlet b ₁ of the rinsing pipe b to the device body a. Since the rinsing pipe b is positioned and supported with respect to the main body a of the apparatus, it is difficult to center the rinsing pipe b, and if there is even a slight misalignment, the washing arm f and the rinsing arm g will swing out of center, causing the washing f, g There was a problem in that uneven rotation occurred, resulting in a decrease in the durability of the dishwasher.

Moreover, in that case, welding distortion occurs in each part, which further exacerbates the difficulty in centering the rinsing pipe b.

The present invention has been developed in view of the above, and its purpose is to screw together the main body of the arm bearing device described above and the rinsing pipe fitted therein as in the conventional method. The object of the present invention is to connect the rinsing pipe with a fitting structure instead of a welding structure so that the rinsing pipe can be reliably and easily centered with respect to the bearing device main body.

(Means for Solving the Problem) In order to achieve this object, the solving means of the present invention, for example, as shown in FIG. An arm bearing device 18 is fixed to the arm bearing device 18, and the arm bearing device 18 is rotatably supported to spray high-pressure cleaning liquid discharged from the washing pump 8 onto the dishes to wash the dishes. A cleaning arm 4 that rotates in response to a reaction force, and the arm bearing device 1
8, coaxially with the rotation center axis of the cleaning arm 4,
It is rotatably supported via a cylindrical rotating shaft 12, and sprays high-pressure rinsing liquid discharged from a rinsing pump 15 onto the dishes to rinse the dishes, and receives the reaction force of the jetting pressure of the rinsing liquid. A dishwasher equipped with a rotating rinse arm 10 is assumed.

In this dishwasher, the arm bearing device 18 has the structure described below. That is, first, a device main body 19 is installed and fixed to the wall of the washing chamber 2, and the device main body 19 has a washing liquid inlet 21 communicating with the washing pump 8 and a rinsing liquid inlet 21 communicating with the rinsing pump 15. Liquid inlet 20
and a rinsing pipe fitting hole 22;
A cleaning arm seat mounting hole 23 is formed concentrically around the rinsing pipe fitting hole 22.

Moreover, the rotating shaft 1 of the rinse arm 10 is provided inside.
A cylindrical rinsing pipe 2 that rotatably inserts and supports the rinsing pipe 2.
4, and one end of the rinsing pipe 24 is connected to the rinsing pipe fitting hole 22 of the apparatus main body 19, and the other end of the rinsing pipe 24 is inserted into the apparatus main body 19 so that the other end protrudes outside the apparatus main body 19 through the washing arm seat mounting hole 23. A close fit.

On the other hand, a ring-shaped cleaning arm seat 27 is liquid-tightly fitted into the cleaning arm seat mounting hole 23 of the apparatus main body 19 with a predetermined gap between it and the outer periphery of the rinsing pipe 24. At the other end of 24, a cleaning arm fixing seat 28 is attached which rotatably and liquid-tightly holds the cleaning arm 4 between the cleaning arm seat 27 and the cleaning arm seat 27.

Furthermore, a plurality of locking protrusions 24a, 24a, . . . are formed on the outer peripheral surface of the intermediate portion of the rinsing pipe 24,
The rinsing pipe 24 has one end connected to the rinsing body fitting hole 22.
The locking protrusions 24a, 24a, .

(Function) With the above configuration, in the present invention, the locking protrusion 24 is attached to the outer peripheral surface of the rinsing pipe 24 of the arm bearing device 18.
a, 24a, .
24a, . By simply fitting the locking protrusions 24a, 24a, . There is no occurrence of welding distortion etc. in the welded structure of the device body 19 and the rinsing pipe 2.
The center runout of the cleaning arm 4 and the rinse arm 10 supported by the cleaning arm 4 can be reliably and easily suppressed.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIG. 4, A is a dishwasher according to an embodiment of the present invention, 1 is the main body of the washing machine, and tableware (not shown) is placed on a rack R in the main body 1 of the washing machine. A cleaning chamber 2 is formed to accommodate the
The washing chamber 2 is opened and closed from the outside by an opening/closing hood 2a which is raised and lowered by operating a handle 2b.
An arm bearing device 1 is attached to the ceiling and bottom of the cleaning chamber 2 through brackets (not shown), respectively.
8 and 18 are arranged and fixed to face each other vertically, and each arm bearing device 18 supports a washing arm 4 and a rinse arm 10 arranged on the center side of the washing chamber 2 so as to be rotatable coaxially with each other. ing. As shown in FIGS. 1 and 5, the cleaning arm 4 includes a closed cylindrical arm portion 5 having a space inside and a through hole 5a in the center, and a cleaning arm portion 5 for cleaning the arm portion 5. A plurality of jet nozzles 6, 6, . . . are integrally attached to the central side of the chamber 2, that is, the lower side for the cleaning arm 4 on the ceiling side, and the upper side for the cleaning arm 4 on the floor side. Become,
Each of the jet nozzles 6 is inclined symmetrically with respect to the rotation axis in a predetermined direction along a tangent to the rotation direction from a vertical plane passing through both the longitudinal center line of the arm portion 5 and the rotation axis. Each of the cleaning arms 4 also has a cleaning liquid supply pipe 7, as shown in FIG.
The cleaning pump 8 is connected to the discharge side of the cleaning pump 8 disposed in the equipment storage room 3 below the cleaning chamber 2 through the is activated, the cleaning liquid in the cleaning tank 9 is sucked and discharged from the cleaning pump 8, and the high-pressure cleaning liquid discharged from the pump 8 is delivered to the dishes in the cleaning chamber 2 from the jet nozzles 6, 6, . . . of each cleaning arm 4. The washing arm 4 is configured to be rotated in response to the reaction force of the spray pressure from the spray nozzle 6 of the cleaning liquid.

On the other hand, the structure of each rinse arm 10 disposed on the center side of the cleaning chamber 2 of each cleaning arm 4 is substantially the same as that of the cleaning arm 4. That is, each rinse arm 10 includes a closed cylindrical arm part 11 having a space inside, and a central part of the arm part 11 on the side opposite to the cleaning chamber 2, protruding at a right angle thereto, and the inside of the arm part 11. A cylindrical rotating shaft 12 that communicates with the space of ) A plurality of jet nozzles 1 installed integrally in
3, 13, ..., each of the above-mentioned jet nozzles 13
are inclined symmetrically with respect to the rotation axis in a predetermined direction along a tangent to the rotation direction from a vertical plane passing through both the center line along the longitudinal direction of the arm portion 11 and the rotation axis. Further, each of the rinse arms 10 is connected to the discharge side of the rinse pump 15 in the equipment storage chamber 3 via the rinse liquid supply pipe 14, and the suction side of the rinse pump 15 is connected to the gas heating means ( (not shown) is connected to a gas booster 17 which is heated to a constant temperature and stored therein, and when the rinsing pump 15 operates, the rinsing liquid in the gas booster 17 is sucked and discharged from the rinsing pump 15.
The high pressure rinsing liquid discharged from each rinse arm 1
The rinsing liquid is sprayed from the nozzles 13, 13, . It is configured to rotate 10.

As shown in FIG. 5, the cleaning liquid is supplied to the water supplied by the water supply pipe 16 to a detergent feeder 31 which is activated by sensing the discharge pressure of the cleaning pump 8.
The detergent supplied from the detergent supply port 32 is mixed into the washing chamber 2 at a predetermined ratio, and after being ejected into the washing chamber 2, it is collected again into the washing tank 9. On the other hand, the rinsing liquid is supplied from the rinsing agent supply port 34 to the water fed into the gas booster 17 by the water supply piping 16 by the rinsing feeder 33 which operates by sensing the discharge pressure of the cleaning pump 8 in the same manner as above. The rinsing agent mixed with the rinsing agent at a predetermined ratio is ejected into the cleaning chamber 2 and then collected in the cleaning tank 9 as a part of the cleaning liquid. Further, in FIG. 5, reference numeral 35 denotes a discharge hose for discharging the cleaning liquid overflowing from the cleaning tank 9 to the outside of the cleaning chamber 2 as the rinsing liquid is supplied into the cleaning chamber 2. In addition, in FIG. 4, T ₁ is a prewash table installed on the right side of the dishwasher A, T ₂ is a draining table installed on the left side, and the prewash table T ₁ is equipped with a sink 37. has been
Dirty dishes are prewashed in the sink 37 of the prewash table T ₁ and dirt that is difficult to remove is removed by the dishwasher A. At the same time, the rack R taken out from the dishwasher A is placed on the draining table T _{2 and} the dishes are washed. It is designed to drain the water.

The above-mentioned ceiling side and floor side arm bearing devices 18,
The arm bearing device 18 on the ceiling side will be explained below.This arm bearing device 18 is attached to the ceiling wall of the washing room 2 as shown in FIGS. 1 to 3. A device main body 19 is fixed, and on the side surface of the device main body 19, a rinsing liquid inlet 20 communicating with the rinsing pump 15 and a cleaning liquid inlet 21 similarly communicating with the cleaning pump 8 are arranged vertically. It has been established. Further, in the center of the device main body 19, a rinsing pipe fitting hole 22 for fitting a rinsing pipe 24, which will be described later, is provided.
Around the rinsing pipe fitting hole 22 and concentrically therewith,
A cleaning arm seat mounting hole 23 for attaching a cleaning arm seat 27, which will be described later, is formed, and the inner peripheral surface of the cleaning arm seat mounting hole 23 has a female threaded portion 23a.
is provided.

In the rinsing pipe fitting hole 22 of the device main body 19,
One end (upper end) of a cylindrical rinsing pipe 24 made of a resin molded product or the like is liquid-tightly fitted via an O-ring 25, and the other end (lower end) of the rinsing pipe 24 is connected to the cleaning arm seat mounting hole. 23 and extends downward to the outside of the device main body 19. Four flange-shaped locking protrusions 24a, 24a, . The locking protrusions 24a, 24a, . . . are fitted to the inner end side of the cleaning arm seat mounting hole 23 so as to close the mounting hole 23, and have two predetermined locking protrusions facing each other in the diametrical direction. The pieces 24a, 24a are fixed from the outer surface of the main body 19 with screws 26, 26. The rinsing pipe 24 has its one end fitted into the rinsing pipe fitting hole 22 as described above, and the locking protrusions 24a, 24a on the outer circumferential surface of the intermediate portion... By fitting,
It is positioned and supported with respect to the device main body 19.

Washing arm seat mounting hole 23 of the device main body 19
A substantially ring-shaped cleaning arm seat 27 is fitted in a liquid-tight manner by screwing a male threaded portion 27a on the outer periphery of one end into a female threaded portion 23a of the mounting hole 23, and the inner peripheral surface of the cleaning arm seat 27 is fitted in a liquid-tight manner. A predetermined gap is formed between and the outer peripheral surface of the rinsing pipe 24.

Further, a washing arm fixing seat 28 is integrally attached to the other end (lower end) of the rinsing pipe 24 by fitting the rinsing pipe 24 into a fitting hole 28a opened on one side of the washing arm fixing seat 28. The through hole 5a in the center of the cleaning arm 4 is inserted into the rinsing pipe 24 protruding from the cleaning arm seat mounting hole 23, and the cleaning arm 4 is connected to the cleaning arm seat 27 and the rinsing pipe 2.
The washing arm fixing seat 28 attached to the washing arm fixing seat 28 is arranged to sandwich the washing arm in a liquid-tight manner. Further, in the washing arm fixing seat 28, a washer fitting hole 28b having a smaller diameter than the fitting hole 28a is provided at the back of the fitting hole 28a.
A locking washer 36 is fitted into the washer fitting hole 28b to lock the rinse arm 10 at the base end of its cylindrical rotating shaft 12 in a manner that prevents the rinse arm from being pulled out. By fitting the rotary shaft 12 into the rinsing pipe 24 and locking it with a locking washer 36, the rinsing arm 10 is rotatably supported on the rinsing pipe 24.

In the arm bearing device 18, the cleaning liquid that has flowed into the device main body 19 from the cleaning inlet 21 is connected to a gap between the outer peripheral surface of the rinsing pipe 24 in the device main body 19, and a locking protrusion 24a of the rinsing pipe 24. ,2
Space between 4a and ring-shaped cleaning arm seat 2
A cleaning liquid flow path 29 is configured to pass through the cleaning liquid passage 7 and supply the cleaning liquid into the cleaning arm 4. Further, a rinsing liquid passage 30 is configured to supply the rinsing liquid flowing from the rinsing liquid inlet 20 of the apparatus main body 19 to the rinsing arm 10 through the inside of the rinsing pipe 24.

Therefore, in the above embodiment, after prewashing the dishes soiled with food residue etc. in the sink 37 of the prewash table _T1 , they are placed in the rack R and placed in the washing chamber 2 of the dishwasher A, and then the dishes are placed in the washing chamber 2 of the dishwasher A. After closing 2a and sealing washing chamber 2, turn on dishwasher A.
When activated, the cleaning pump 8 is first activated. With the operation of the cleaning pump 8, the high-pressure cleaning liquid discharged from the pump 8 passes through the cleaning liquid passage 29 of each arm bearing device 18 to each cleaning arm 4.
are supplied to the jet nozzle 6 of each cleaning arm 4,
6, ... is ejected towards the dishes on the rack R, and the synergistic effect of the physical force of the washing liquid ejected from the washing arm 4 and the decomposition power against the dirt removes the dirt from the dishes and washes the dishes. be done.

Further, the washing arm 4 rotates in response to the reaction force of the jetting pressure of the jetting cleaning liquid, and the rotation of the arm 4 causes the cleaning liquid to evenly hit the dishes, thereby increasing the cleaning effect on the dishes.

After the tableware washing step continues for a predetermined period of time, the tableware is then rinsed for a predetermined period of time. That is, the rinsing pump 15 is activated,
This operation of the rinsing pump 15 causes the pump 15 to
The high-pressure rinsing liquid discharged from each rinsing arm 1 passes through the rinsing liquid passage 30 of each arm bearing device 18.
0, and is jetted from the spouting nozzles 13, 13, . is washed away and the dishes are rinsed.

Further, the rinse arm 10 rotates under the reaction force of the jetting pressure of this jetting rinsing liquid, and this arm 10
As the rinsing liquid rotates, the rinsing liquid hits the dishes evenly,
Therefore, the rinsing effect on tableware is enhanced.

In this case, each arm bearing device 18
When assembling, the rinsing pipe 24 is fitted into the rinsing pipe fitting hole 22 of the main body 19, and the locking protrusions 24a, 24a, . At the same time, the female thread part 2 of the cleaning arm seat mounting hole 23
Attach the washing arm seat 27 to 3a by screwing it together.
After that, the washing arm 4 is externally fitted onto the rinsing pipe 24 and held between the washing arm receiving seat 27 and the washing arm fixing seat 28, and the rinsing pipe 24 is
The arm bearing device 18 can be assembled by inserting the rotating shaft 12 of the rinse arm 10 into it. Therefore, all that is required is to fit the rinsing pipe 24 into the rinsing pipe fitting hole 22 of the main body 19 of the apparatus, and to fit the locking protrusions 24a, 24a, ... on the outer periphery of the rinsing pipe 24 into the washing arm seat mounting hole 23. and the device body 1
9, the rinsing pipe 24 can be assembled into the arm bearing device 18, thereby improving the ease of assembling the arm bearing device 18.

Further, in this way, one end of the rinsing pipe 24 is fitted into the rinsing pipe fitting hole 22 of the main body 18, and the locking protrusions 24a, 24a, . . . on the outer periphery are fitted into the washing arm seat mounting hole 23. Since it can be assembled to the device main body 19, the rinsing pipe 24 can be reliably and easily centered and assembled to the device main body 19, and there is no welding distortion in each part compared to conventional welding. Therefore, the durability of the dishwasher A can be improved by reliably preventing the occurrence of center runout during rotation of the washing arm 4 and the rinsing arm 10.

Furthermore, a rinsing pipe fitting hole 2 is provided in the device main body 19.
2 is formed, and a rinsing pipe 24 is connected to the fitting hole 22.
The device body 1 is liquid-tightly fitted through the ring 25.
Since the cleaning liquid flow path 29 and the rinsing liquid flow path 30 are partitioned in the interior of the cleaning liquid flow path 29 and the rinsing liquid flow path 30, the cleaning liquid flow path 29 and the rinsing liquid flow path 30 are separated by the sealing effect of the O-ring 25.
The cleaning liquid in the cleaning liquid flow path 29 does not mix with the rinsing liquid in the rinsing liquid flow path 30 when rinsing dishes, and therefore the rinsing performance for the tableware can be improved and maintained. can.

In the above embodiment, the cleaning arm seat mounting hole 23 of the device main body 19 in each arm bearing device 18 is
Although the cleaning arm seat 27 is screwed into and attached to the cleaning arm seat 27, a liquid-tight fit may be provided via an O-ring.

(Effects of the invention) As explained above, according to the invention, an arm bearing device for rotatably supporting the washing arm and the rinsing arm of a rotary jet dishwasher on the same axis is assembled into the main body of the device. The rinsing arm is supported by the rinsing pipe, while the washing arm is supported by a washing arm seat attached to the washing arm seat mounting hole of the device body and a washing arm fixing seat attached to the other end of the rinsing pipe. At the same time, when assembling the rinsing pipe to the main body of the apparatus, one end of the rinsing pipe is inserted into the rinsing pipe fitting hole of the main body of the apparatus, and the locking protrusion on the outer circumferential surface of the pipe is fitted into the washing arm seat mounting hole. By fitting each other and positioning the rinsing pipe with respect to the main body of the apparatus, the rinsing pipe can be reliably and easily assembled to the main body of the apparatus while centering, and uneven rotation of the cleaning arm and the rinse arm can be prevented without centering. This makes it possible to reduce the amount of water used and, in turn, improve the durability of the dishwasher.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, and FIG. 1 is an enlarged front sectional view of the arm support device;
FIG. 2 is a plan view of the same, and FIG. 3 is a side view of the same. FIG. 4 is a perspective view showing the dishwasher and a table around it, and FIG. 5 is a piping system diagram thereof. FIG. 6 is a diagram corresponding to FIG. 1 showing a conventional example. A... Dishwasher, 2... Washing chamber, 4... Washing arm, 8... Washing pump, 10... Rinse arm, 12... Rotating shaft, 15... Rinse pump, 18
...Arm bearing device, 19...Device main body, 20...
...rinsing liquid inlet, 21...cleaning liquid inlet, 22...
... Rinsing pipe fitting hole, 23 ... Washing arm seat mounting hole, 24 ... Rinsing pipe, 24a ... Locking protrusion, 2
5...O ring, 27...Cleaning arm catch, 28
...Cleaning arm fixing seat, 29...Cleaning liquid flow path, 3
0...rinsing liquid flow path.

Claims (1)

[Scope of utility model registration request] A washing chamber 2 that accommodates dishes, an arm bearing device 18 fixed to the wall inside the washing chamber 2, and a rotatably supported arm bearing device 18 that receives high-pressure cleaning liquid discharged from the washing pump 8. A washing arm 4 that sprays water onto the dishes to wash the dishes and rotates in response to the reaction force of the spraying of the washing liquid, and a cylindrical rotating shaft mounted on the arm bearing device 18 coaxially with the central axis of rotation of the washing arm 4. a rinse arm 10 which is rotatably supported via a shaft 12, sprays high-pressure rinsing liquid discharged from a rinsing pump 15 onto the dishes to rinse the dishes, and rotates in response to the reaction force of the jetting of the rinsing liquid; In the dishwasher equipped with the above, the arm bearing device 18 has a washing liquid inlet 21 communicating with the washing pump 8 and a rinsing liquid inlet 20 communicating with the rinsing pump 15, and also has a rinsing pipe fitting hole 22 and a rinsing liquid inlet 20 communicating with the rinsing pump 15. A cleaning arm seat mounting hole 23 formed concentrically around the pipe fitting hole 22
a device main body 19 having one end thereof;
The other end of the rinsing arm 1 is fluid-tightly fitted into the rinsing pipe fitting hole 22 of the rinsing arm 1, while the other end protrudes outside the main body 19 of the apparatus through the rinsing arm seat mounting hole 23.
The rinsing pipe 24 rotatably inserts and supports the rotating shaft 12 of the 0, and the outer periphery of the rinsing pipe 24 is liquid-tightly fitted into the washing arm seat mounting hole 23 of the apparatus main body 19 with a predetermined gap. The washing arm fixing seat 28 is attached to the other end of the rinsing pipe 24 and holds the washing arm 4 rotatably and fluid-tight between the washing arm seat 27. A plurality of locking protrusions 24a, 24a, . and the locking protrusion 24
a, 24a, ... to the cleaning arm seat mounting hole 23
A dishwasher characterized in that the dishwasher is positioned with respect to the apparatus main body 19 by fitting into the apparatus body 19.