JPH1176132A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent formation of bubbles in wash water retained in a washing tank. SOLUTION: A nozzle holder 40 of a double pipe structure is installed above a washing tank while pointing upward. A washing nozzle 30 is supported by a support flange 59 as a bearing hole 52 provided in a center hole 50 in its upper surface is fitted over an inner pipe 42, and is rotatably supported in such a way as to be communicated with an outer pipe 41 as a center hole 49 in its lower surface is loosely fitted over the outer pipe 41 with a gap S between them. A rinsing nozzle 31 is rotatably supported against the upper end of the inner pipe 42 in such a way as to be communicated therewith. At a lower portion where the gap S forms on the outer periphery of the outer pipe 41, a guide flange 70 is formed. Even if wash water leaking from the gap S is ejected downward when supplied to the washing nozzle 30, it is made to drop toward the washing tank after being temporarily guided sideways on contact with the guide flange 70. Since the force of the wash water is decreased, bubbles are unlikely to form in the wash water in the washing tank, and the suction of air in the washing pump is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for washing dishes and the like, and more particularly to a washing machine improved to prevent a pump for pumping washing water from sucking air.

[0002]

2. Description of the Related Art Generally, a washing machine of this type is provided with a washing tank for storing washing water below a washing chamber, and a washing nozzle and a rinsing nozzle are arranged on the upper surface of the washing tank so as to be rotatable about a vertical axis. After washing, the washing water in the washing tank is pumped up by the pump and sprayed from the washing nozzle toward the dishes, and then the rinse water pumped up from the separately provided hot water storage tank is sprayed from the rinse nozzle for rinsing. It is supposed to do. During this time, the cleaning nozzle and the rinsing nozzle rotate by the reaction force of the injection.

[0003] Various structures have been conventionally proposed for the arrangement of the washing nozzle and the rinsing nozzle, but the structure and the assembling work have been simplified as disclosed in Utility Model Registration No. 2536676. What is described in the gazette is known. As shown schematically in FIG. 13, the outer pipe a for discharging the cleaning water and the inner pipe b for discharging the rinsing water are upwardly double-tubular, and the upper end of the inner pipe b is protruded. The shaft hole d on the lower surface side of the shaft holes provided in the washing nozzle c and penetrating in the vertical direction is disposed in the outer tube a.
The bearing tube e fitted in the shaft hole on the upper surface side is fitted in the inner tube b, and is rotatably received by the support plate f protruding from the outer periphery of the inner tube b. The rinsing nozzle g is supported, and has a structure in which the rinsing nozzle g is rotatably fitted to the protruding end of the inner tube b so as to communicate with the inner tube b. Since the bearing structure is simple and the washing nozzle c and the rinsing nozzle g are assembled in such a manner that they are sequentially dropped, there is an advantage that the assembling property is excellent.

[0004]

In the prior art, the structure and the assembling simplicity are simplified as described above. Therefore, the lower shaft hole d and the lower shaft hole d are particularly arranged at the portion where the cleaning nozzle c is to be assembled. It has a structure in which a slight gap s is formed between the tube a. Without this gap s, the cleaning nozzle c
Cannot rotate smoothly. Therefore, in order to perform the cleaning, the cleaning water in the cleaning tank is pumped up by the pump, and passes through the outer pipe a as shown by the solid line arrow in FIG.
When the cleaning water is discharged, a part of the cleaning water may be jetted downward through the gap s. Then, the cleaning nozzle c
The washing tank is provided below the washing tank, so that the jetted washing water is vigorously sprayed on the surface of the washing water stored in the washing tank to generate air bubbles, which are sucked by the pump to form a so-called bubble. The air was causing the bleeding. In particular, when the washing tank is shallow, air is likely to be generated, and when the air is generated, the pump may not be able to exhibit its capacity sufficiently. The present invention has been completed based on the circumstances described above, and the purpose is to
An object of the present invention is to suppress the generation of bubbles in the washing water stored in the washing tank.

[0005]

Means for Solving the Problems As means for achieving the above object, the present invention according to claim 1 is characterized in that the washing water in the washing tank is provided above the washing tank for storing the washing water through a pump. In a cleaning machine in which a discharge pipe that discharges water is disposed upward, and a cleaning nozzle that communicates with the discharge pipe is rotatably supported in a state where a lower shaft hole is loosely fitted to an outer periphery of the discharge pipe. A feature is that a flange-shaped guide is provided on the outer periphery of the discharge pipe below the portion where the lower shaft hole of the cleaning nozzle is loosely fitted. The invention according to claim 2 is characterized in that, in the invention according to claim 1, the periphery of the flange-shaped guide is bent upward.

[0006]

Actions and effects of the present invention

<Invention of Claim 1> Washing water leaked and ejected from a gap formed between a shaft hole on the lower side of a washing nozzle and a discharge pipe is guided to the side by a flange-shaped guide, and then stored in a washing tank. Fall toward the washed water. By reducing the power of the leaked washing water, bubbles are less likely to be formed in the stored washing water, and thus, the pump can minimize the suction of air. <Invention of Claim 2> Since the washing water that has leaked and jetted is directed upward by the flange-shaped guide, it can be used for washing the object to be washed.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. <First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, for example, a container washer used for cleaning a container such as a bowl or a whisk used for cake production, a cooking utensil, and the like is illustrated. First, the overall structure will be described with reference to FIGS. This washing machine is provided with a vertically long box body 1, an upper side in the box body 1 is a washing chamber 2, an entrance 3 is opened in the front surface thereof, and a bottom side in the box body 1 is provided. The washing tank 4 stores the washing water. The cleaning tank 4 is provided with a throw-in type heater (not shown). Channel-shaped columns 6 are fixed to the left and right sides of the left and right sides of the box body 1 by welding, respectively, and the left and right columns 6 on the front side are particularly oriented so that the openings are directed rearward. The four columns 6 have upper ends slightly projecting from the ceiling surface of the box 1, and lower ends projecting larger than the bottom surface of the box 1. A leg 7 is provided at the lower end of each column 6 to support the box 1, thereby constituting a main body 9 of the washing machine.

A lower edge of the door 10 is supported at the entrance 3 so as to be swingable. Panels 13 are provided below the entrance 3 in the main body 9 of the washing machine, right and left side surfaces, and a ceiling surface, respectively. In a portion where the panel 13 is provided, the periphery of the box 1 has a double wall structure. . Doorway 3
An operation unit 11 is provided above the box 1, and a machine room 12 is formed below the box 1. The opening / closing structure of the door 10 is as follows. The door 10 has a double structure and is formed in a front rectangular shape capable of covering the front surface of the entrance 3. Is supported by a shaft 17 of a bracket 16 protruding from the front surface of the support column 6 so as to be able to swing forward.

On the other hand, storage grooves 21 for the stopper arm 19 are formed on the left and right side edges of the back surface of the door 10. A base end of a stopper arm 19 provided with a hook 20 at a distal end is rotatably supported by a shaft 22 in the storage groove 21. A vertical slit 24 is formed in the above-described front column 6, and the stopper arm 19 can be inserted into the double wall 25 on each of the left and right side surfaces through the slit 24. In the double wall 25, as shown in FIG.
6 and a locking shaft 27 that can be locked to the hook 20 of the stopper arm 19 are provided side by side. Therefore, FIG.
When the door 10 is swung to the closed position, the lower end of the stopper arm 19 on the base end side is received by the rolling roller 26, and the stopper arm 19 is tilted rearward and obliquely upward. take.

When the door 10 is opened from this state and is swung until it takes a horizontal position, as shown in FIG. 3, the hook 20 of the stopper arm 19 is locked by the locking shaft 27. The door 10 is held in an open state in a horizontal posture. Further, when the door 10 is slightly raised from the state shown in FIG.
From the stopper arm 19
Is rotated toward the front side about the shaft 22 so that the locking shaft 2
7 can be removed. The stopper arm 19 can be inverted as it is toward the door 10 through the slit 24 and can be stored in the storage groove 21. When the holding of the door 10 is released after removing the left and right stopper arms 19, the door 10
Swings further downward, as shown in FIG. 4, and swings to a position almost directly below, and is fully opened.

In order to return the door 10 to the normal state, the door 10 is raised from the fully opened state in FIG. 4, and at the same time, the stopper arm 19 accommodated in the accommodating groove 21 is rotated toward the main body 9 of the washing machine, and the slit is opened. 24 and inserted into the double wall 25,
It is placed on the rolling roller 26. Two stopper arms 19
Is operated in this manner, the door 10 is subsequently raised and the door 10 may be closed as shown in FIG. The door 10
A gas spring 28 for assisting the closing operation of the door 10 is interposed between the cleaning device main body 9 and the cleaning device main body 9.

Next, the internal structure will be described in detail. FIG.
As shown in FIG.
0 and the rinsing nozzles 31 are arranged in pairs. In the machine room 12, an upper cleaning pump 32 and a lower cleaning pump 33 are provided.
And is installed. The suction pipes 32A, 33A of the cleaning pumps 32, 33 are connected to the individual suction ports 35, 35 opened side by side on the bottom surface of the cleaning tank 4. The discharge pipe 33B of the lower cleaning pump 33 is
Protruding from the bottom surface of the cleaning chamber 2 and faces the center of the lower surface side of the cleaning chamber 2, while the discharge pipe 32B of the upper cleaning pump 32 rises inside the double wall 25 on the side and is connected to the inside of the double ceiling. Protruding in the center of.

A rinsing pump 36 connected to a hot water storage tank (not shown) is provided in the machine room 12, and a discharge pipe 37 thereof rises in the double wall 25 on the opposite side to form a double pump. A discharge pipe 38 protruding from the center of the ceiling of the cleaning chamber 2 and branching from the middle of the discharge pipe 37 projects from the side surface of the cleaning chamber 2 and faces the center of the lower surface side of the cleaning chamber 2. A nozzle holder 40 is connected upward to a protruding end of the lower cleaning water discharge pipe 33B and the rinsing water discharge pipe 37 which are opposed to each other, while the upper cleaning water discharge pipe 32B and the rinse water discharge. The nozzle holder 40 is connected downward to the protruding ends of the pipes 37, which penetrate through the ceiling surface of the cleaning chamber 2.

The nozzle holder 40 is formed of a brass casting, and taking the lower one as an example, as shown in FIG. 6, a nozzle holder 40 is provided in an opening facing upward of an elbow-shaped outer tube 41. A tall inner pipe 42 having an open upper end has a double pipe structure fitted concentrically, and the opening 41A facing the side of the outer pipe 41 is provided with a tip of a discharge pipe 33B of the lower cleaning pump 33. Is connected. On the other hand, the lower end of the inner pipe 42 is connected to the tip of the discharge pipe 38 below the rinse pump 36 through the outer pipe 41.

As shown in FIG. 7, the cleaning nozzle 30 has a hollow mounting body 44 having a regular hexagonal shape, and three mounting ports protruding from the side surface thereof at intervals of 120 degrees. Nozzles 46 each having a row of ejection tips 47 are radially attached to 45. Center holes 49 and 50 are respectively formed on the upper and lower surfaces of the mounting body 44, and the center hole 49 on the lower surface can be fitted to the upper end of the outer tube 41 of the nozzle holder 40. On the lower surface side of the upper center hole 50, a bearing cylinder 52 that can be tightly fitted to the inner pipe 42 is attached. A flange portion 53 is provided on the upper surface of the bearing cylinder 52.
Are formed, and a plurality of balls 55 are inserted into grooves 54 provided on the upper surface of the flange portion 53 so that the ring-shaped rotating plate 5 is formed.
6 and the flange portion 5 of the bushing 52.
3 is applied to the edge of the center hole 50 on the upper surface of the mounting body 44 from below, and is fixed by a screw 57. The rotating plate 56 is prevented from falling off at the edge of the center hole 50 on the upper surface of the mounting body 44. A bearing tube 52 assembled to the washing nozzle 30 is fitted from the upper end of the inner tube 42 and a support flange 5 protruding from the outer periphery of the inner tube 42.
9 is received via a wear prevention plate 60, and a center hole 49 on the lower surface of the mounting body 44 is fitted to the outside of the upper end of the outer tube 41, and is rotatably supported around the vertical axis in this state.

One of the rinsing nozzles 31 is provided with a T-shaped pipe 62 as shown in FIG. 8, and two nozzles 63 arranged in a row of ejection tips 64 are connected to the laterally connected ports. ing. On the outer periphery of the downward connection port of the T-tube 62, a mounting ring 66 is fitted via a washer 65 so as to be relatively rotatable, and a seal ring 67 is fitted. Has been assembled. Then, the rinsing nozzle 31 screwes the mounting ring 66 onto a female screw cut at the upper end of the inner pipe 42,
It is fixed in a watertight manner through a seal ring 67,
Two nozzles 63 are supported so as to be freely rotatable about the vertical axis.

On the upper surface side of the cleaning chamber 2, although not shown in detail, the cleaning nozzle 30 and the rinsing nozzle 31 are rotatably supported by the same procedure in the opposite direction to the lower surface side. The rotating plate 56 rotatably mounted via the ball 55 does not function on the lower side, but on the upper side, the rotating plate 56 is attached to the mounting ring 6 of the rinsing nozzle 31.
6 and the rotating plate 56 is
It functions so that the cleaning nozzle 30 can be rotated around the vertical axis separately from the rinsing nozzle 31.

Now, in the mounting portion of the lower cleaning nozzle 30, the center hole 49 on the lower surface of the mounting body 44 is provided so that it can rotate around the outer tube 41 smoothly without providing a special bearing member. It is fitted with a gap S between it and the tube 41. This gap S is actually slight and is emphasized in FIG. In the present embodiment, the outer tube 4
A guide flange 70 is formed at a position below a portion where the gap S is formed in FIG. The protruding length of the guide flange 70 is set so as to reach the limit position X of the washing water leaking and jetting from the gap S, as shown in FIG. In the upper cleaning nozzle 30, the center hole 49 located on the upper surface side of the mounting body 44 is fitted with a gap S between the outer nozzle 41 and the upper hole. The guide flange 70 provided on the lower outer tube 41 is not provided.

Referring again to FIG.
An outlet 72 is opened on the bottom surface of the container, and is connected to a drain pipe 73.
Four are standing. This overflow pipe 74
Inner and outer pipes are fitted at eccentric positions and partly adhered to form a double pipe structure. The upper end of the inner pipe is an overflow opening 75, and the water level L of the washing water is maintained at the position of the overflow opening 75. It is supposed to be. Further, a box-shaped filter 77 is provided so as to cover the above-described two suction ports 35 on the bottom surface of the washing tank 4. This filter 77 has a box shape with an open bottom,
A punch metal 78 is stretched on each of the two side surfaces.

This embodiment has the above-described structure,
Subsequently, the operation will be described. When performing cleaning, the door 10 is swung to the front side from the closed state as shown in FIG. 2 and brought to the open position where the door 10 takes a horizontal posture as shown in FIG. Subsequently, the rack 80 containing the object to be cleaned
Is placed on the door 10, the rack 80 is pushed into the cleaning chamber 2 along rails 81 (see FIG. 1) provided on both side surfaces of the cleaning chamber 2 as it is, and the door 10 is closed. When the door 10 is closed, first, both cleaning pumps 32 and 33 are driven, and the cleaning water stored in the cleaning tank 4 is moved up and down through the discharge pipes 32B and 33B as shown by solid arrows in FIG. Are washed by spraying cleaning water from the ejection tips 47 of the respective nozzles 46 toward the object to be cleaned while rotating by receiving the reaction force of the ejection. .

Here, as described above, in the mounting portion of the lower cleaning nozzle 30, between the center hole 49 on the lower surface side of the mounting body 44 and the outer periphery of the upper end of the outer tube 41 in the nozzle holder 40. Has a slight gap S, so that the cleaning nozzle 3
When the cleaning water is supplied to the space 0, a part of the cleaning water leaks from the gap S and is ejected downward. However,
Since the guide flange 70 is formed at a position below the portion where the gap S is formed in the outer pipe 41, the washing water leaking and jetting out from the gap S is discharged from the guide flange 70 as shown by the arrow in FIG. In this case, the water is once guided laterally, and then falls onto the cleaning water stored in the cleaning tank 4. That is, since the momentum at the time of falling is reduced, it is difficult for bubbles to be generated in the stored washing water, so that air is sucked into the washing pumps 32 and 33, that is, so-called air is prevented from occurring. On the other hand, in the upper cleaning nozzle 30, a part of the cleaning water leaks from the gap S between the center hole 49 of the attachment body 44 and the outer pipe 41 of the nozzle holder 40 and is ejected upward. You. This directly hits the ceiling surface of the cleaning room 2, so that bubbles, dust, and the like of the detergent attached to the ceiling surface can be washed away.

When the cleaning process is completed, the rinsing pump 36
Is driven, as shown by the dashed arrow in FIG.
Rinse water in the hot water storage tank is supplied to upper and lower rinse nozzles 31 through discharge pipes 37 and 38,
In the same manner, rinsing water is ejected from the ejection tip 64 of the nozzle 63 toward the object to be cleaned while rotating while receiving the reaction force of the ejection, and rinsing is performed. The overflow water in the cleaning tank 4 is sequentially discharged through an overflow pipe 74. When the cleaning and rinsing are completed, the door 10 is opened again as shown in FIGS. 1 and 3, the rack 80 is once pulled out onto the door 10, and the object to be cleaned may be continuously collected. When the door 10 is fully opened as shown in FIG. 4, there is almost no portion protruding in front of the entrance 3, so that it is possible to bring the entrance 3 closer to the front from the front and perform cleaning work and maintenance through the entrance 3 extremely. It will be easier.

As described above, according to the present embodiment,
In the cleaning process, even if a part of the cleaning water leaks from the lower cleaning nozzle 30 and jets downward, the cleaning water stored in the cleaning tank 4 after being once guided sideways by hitting the guide flange 70. It acts to fall on the surface of the washing water, and the momentum at the time of falling is reduced, so that it is difficult for bubbles to be formed in the stored washing water. Is prevented from occurring. Therefore, the performance of the cleaning pumps 32 and 33 can be sufficiently exhibited, and the cleaning efficiency can be improved. Further, since air can be prevented from being formed even in the shallow washing tank 4, it can contribute to downsizing of the washing machine. Further, since the guide flange 70 is formed integrally with the nozzle holder 40 by a brass casting, the strength is large, and there is no possibility that the guide flange 70 will be deformed even when the jet pressure of the washing water is received.

<Second Embodiment> FIG. 10 shows a second embodiment of the present invention.
1 shows an embodiment. In the second embodiment, the nozzle holder 4
The shape of the guide flange 70A provided on the outer tube 41 at 0 is changed. That is, a bent portion 83 facing upward is formed on the periphery of the guide flange 70A. The other structure is the same as that of the first embodiment, and the portions having the same function are denoted by the same reference numerals, and the duplicate description will be omitted. That is, according to the second embodiment, in the cleaning step, a part of the cleaning water leaks from the gap S between the center hole 49 of the attachment body 44 of the lower cleaning nozzle 30 and the outer tube 41 of the nozzle holder 40. Even if the cleaning water is ejected downward, as shown by the arrow in FIG. 10, it is directed upward along the bent portion 83 while hitting the guide flange 70 </ b> A, and then over the cleaning water stored in the cleaning tank 4. Will fall. Similarly, since the momentum at the time of falling is reduced, bubbles are hardly generated in the stored washing water, and the washing water is directed upward, so that the object to be washed can be efficiently used.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) The shape of the attachment body provided in the cleaning nozzle 30 may be formed in a hollow shape having a plane circular shape as shown in the attachment body 44A of FIG.

(2) Further, as shown in FIG. 12, the structure of the portion to which the nozzle 46 is attached is such that the base end side of the nozzle 46 is fitted into an attachment port 45A opened on the peripheral surface of the attachment body 44A, and welding is performed. May be fixed. (3) The present invention is not limited to the container washing machine exemplified in the above embodiment, and can be applied to all washing machines including a dishwasher.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a container cleaning machine according to a first embodiment of the present invention with a door opened.

FIG. 2 is a side view of a panel with a door closed and a panel removed.

FIG. 3 is a partially cutaway side view with a door opened.

FIG. 4 is a partially cutaway side view in a state where the door is fully opened downward.

FIG. 5 is a sectional view showing the internal structure of the container washer.

FIG. 6 is an enlarged sectional view showing details of a nozzle holder part.

FIG. 7 is an exploded perspective view of a rotation center portion of the cleaning nozzle.

FIG. 8 is an exploded perspective view of a rinse nozzle.

FIG. 9 is an explanatory diagram for setting a protrusion length of a guide flange.

FIG. 10 is a partially cutaway front view of a nozzle holder according to a second embodiment.

FIG. 11 is a perspective view showing a modification of the mounting body.

FIG. 12 is a partial cross-sectional view showing a modified example of a mounting portion of a nozzle.

FIG. 13 is a cross-sectional view showing a conventional nozzle mounting structure.

[Explanation of symbols]

4. Cleaning tank 30 Cleaning nozzle 31 Rinse nozzle 33 Cleaning pump 40 Nozzle holder 41 Outer tube 42 Inner tube 44
Attachment 46 46 Nozzle 49 Central hole 50 (at the bottom of attachment 44) 50 Central hole 52 at the top of attachment 44 Bearing cylinder 59 Support flange 70 Guide flange 70A
Guide flange 83: Bend 44A: Mounting body

Claims (2)

[Claims] 1. A discharge pipe for discharging the cleaning water in the cleaning tank via a pump is disposed above the cleaning tank for storing the cleaning water, and a cleaning nozzle communicated with the discharge pipe. In a washing machine rotatably supported in a state where the lower shaft hole is loosely fitted to the outer circumference of the discharge pipe, the lower shaft hole of the cleaning nozzle is loosely fitted to the outer circumference of the discharge pipe. A washing machine characterized in that a flange-shaped guide is provided at a position below the portion. 2. The washing machine according to claim 1, wherein a peripheral edge of the flange-shaped guide is bent upward.