JPH0938592A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently wash an article mounted on the rack of another step even when a nozzle of the uppermost step is removed by installing a water supply passage which is connected to a supply port formed in the ceiling part in a washing tank and to which water is supplied from the supply port when the rack of the uppermost step is set in a washing tank. SOLUTION: An upper nozzle 23 is installed freely rotatably in the lower part of an upper step rack UR, and the nozzle 23 is attached to a water supply shaft 24. The shaft 24, when the upper step rack UR is set in a washing tank 20, is arranged to contact the supply port 25 attached to the ceiling of the washing tank 20, and washing water, etc., when supplied from a supply pipe to the supply port 25, are ejected from the upper and lower ejection ports of the upper nozzle 23 through the water supply shaft 24. Besides, when the upper step rack UR is removed, the position of a fixed nozzle 25a is kept by the force of a spring, the supply port 25 itself moves downward relatively, so that the washing water, etc., are dispersed and ejected effectively by the increase in the dispersion angle of a water flow.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to tableware, test tubes,
The present invention relates to a washing machine for automatically washing test equipment such as beakers and flasks.

[0002]

2. Description of the Related Art Conventionally, there has been used a washing machine for automatically washing tableware and test instruments such as test tubes, beakers and flasks. In order to wash the test equipment with this washing machine, usually, the used test equipment is placed on a dedicated wire mesh rack (hereinafter simply referred to as "rack"), and the rack on which this test equipment is placed is placed on the washing machine. Set in the washing tank and wash.

The cleaning tank is equipped with a rotary nozzle, and a plurality of jet nozzles are arranged in the rotary nozzle. The cleaning water containing the detergent stored in the cleaning tank is drawn by a pump and supplied to the rotary nozzle. As a result, the wash water is sprayed from the spray port toward the test device, which allows the test device to be washed. The water after washing is
After being collected at the bottom of the cleaning tank (called a water storage tank), it is pumped up and used again for cleaning.

When the test device is rinsed after cleaning, rinse water containing no detergent is supplied to the cleaning tank and stored in the water tank. The rinse water stored in the water tank is supplied to the rotary nozzle and jetted from the jet port. As a result, the test fixture is rinsed with the sprayed rinse water. The rinse water after rinsing is collected in a water tank and then pumped by a pump to be used for rinsing again.

The rack on which the test equipment is placed is composed of two upper and lower racks.
It is a tier, and it is possible to use only the upper rack, only the lower rack, or both upper and lower racks. The upper rack is used to mount a relatively small test device such as a test tube, and the lower rack is used to mount a relatively large test device such as a beaker.

Further, the rotary nozzle for injecting washing water or rinsing water (hereinafter referred to as "washing water etc.") is usually in a state where the lower rack is set and a lower rack is set, and an upper rack is set. The injection ports are respectively arranged in the lower part of the upper rack, and the injection ports are set to inject upward from the lower racks, respectively. Further, the water supply passage for supplying the washing water and the like to the upper rotary nozzle is provided on the ceiling of the washing tank so as not to interfere with placing the test instrument on the lower rack.

[0007]

By the way, when cleaning large test instruments such as flasks and graduated cylinders with the above-mentioned washing machine, when the upper rack is set, the space between the upper rack and the lower rack is narrow, and Since it is not possible to mount it, it is necessary to remove the upper rack and the upper rotary nozzle, and to use the pipe for supplying water to the rotary nozzle by removing it from the ceiling supply port.

Therefore, the supply port provided in the ceiling of the cleaning tank for supplying the cleaning water and the like to the rotary nozzle is opened, and the cleaning water and the like is discharged from there. In the conventional washer, the wash water discharged from the supply port dropped vertically, so even if you try to wash the test equipment mounted on the lower rack using this wash water, etc. It could not be washed, and in some cases the impact of falling wash water or the like could cause the test equipment to fall or be damaged.

Therefore, according to the present invention, a plurality of nozzles are provided in the cleaning tank, the objects to be cleaned are placed on the racks set in the cleaning tank in a plurality of stages, and the cleaning water is sprayed by the nozzles. In a washing machine that can be washed, when removing the uppermost rack and the uppermost nozzle to wash dishes and test utensils placed on other racks, place them on the other racks. An object of the present invention is to realize a cleaning machine that can efficiently and evenly clean the cleaned object to be cleaned.

[0010]

According to the first aspect of the present invention, there is provided a washing machine in which a plurality of nozzles are provided in a washing tank and racks set in the washing tank are provided with a plurality of nozzles. In a washing machine in which the washing water can be sprayed and washed by the nozzle, a supply port for supplying the washing water is attached to the ceiling of the washing tank, and the rack at the top is installed. A water supply path for supplying water from the supply port to the uppermost nozzle in a state of being set in the cleaning tank is provided, and the uppermost rack, the uppermost nozzle and the water supply channel are removed from the supply port of other stages. The present invention is characterized in that a dispersion member is provided which can disperse and spray cleaning water or the like when cleaning the object to be cleaned placed on the rack.

Here, "dispersing and injecting cleaning water and the like" means not spreading direct current but spreading and dropping at a certain angle and direction. The “dispersion member” may have any shape and structure as long as it can disperse and inject the cleaning water and the like. For example, the supply port may be provided with a number of small holes, and the supply port may have a concentric shape. A plurality of radiating rings may be provided.

With the above construction, when the uppermost rack or the like is set in the cleaning tank, the cleaning water or the like is guided directly from the supply port to the water supply passage, but the uppermost rack or the like is installed in the cleaning tank. When removed from the, the supply port is exposed,
It is possible to disperse cleaning water and the like and spray it evenly onto the object to be cleaned. The washing machine according to claim 2 is the washing machine according to claim 1, wherein the uppermost nozzle can be set in a washing tank integrally with the uppermost rack, and the water supply passage is It is a water supply shaft connected to an upper stage nozzle, and a water intake port that is elastically pressure-contacted with the supply port is attached to a tip of the water supply shaft in a state where the uppermost rack is set in a cleaning tank. And

With this structure, when the top rack is removed, the top nozzle can be removed at the same time. When the rack on the uppermost stage is set, the water intake of the water supply shaft is brought into pressure contact with the supply port, whereby washing water and the like can be guided from the supply port to the water supply shaft without leakage. The pressure contact between the intake port and the supply port of the water supply shaft is specifically made by forming the intake port or the supply port with an elastic member (rubber, resin, etc.) or by providing a spring to the intake port or the supply port. This can be achieved by urging in the direction of pressure contact with force.

A washing machine according to a third aspect of the present invention is the washing machine according to the first aspect, wherein the dispersion member provided at the supply port can adjust a direction or an angle at which the washing water or the like is jetted. It is characterized by Here, the adjustment of the injection angle and direction can be set by devising the shape and structure of the dispersion member. For example, if the shape of the supply port is a flared shape like a trumpet, and the dispersion member is a bell-shaped shape with a widened bottom, the relative position of the dispersion member and the supply port can be adjusted, for example. The angle and direction of injection can be set freely. The relative position may be adjusted by moving the dispersing member in and out with a screw, for example.

According to a fourth aspect of the present invention, there is provided the washing machine according to the second aspect, wherein the dispersion member has a bell-shaped shape with a widened base and is provided on the ceiling of the washing tank. It is fixed, and the supply port is attached to the ceiling part in the cleaning tank so that it can move up and down, and the supply port pushes upward by abutting against the water intake port with the uppermost rack set in the cleaning tank. It is characterized in that it is in the state of being set.

With this structure, when the uppermost rack is set in the washing tank and the supply port comes into contact with the water intake port, the supply port is pushed upward, so that the dispersion member is relatively lowered. Therefore, it is possible to reduce the resistance when guiding the wash water or the like to the water supply shaft. When the top rack is set in the cleaning tank, it is not necessary to disperse and spray, but rather the dispersion member acts as a resistance that smoothly guides cleaning water, etc. to the water supply shaft. By so doing, it is possible to reduce the resistance of the dispersion member and smoothly guide the wash water or the like to the water supply shaft.

[0017]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing the external configuration of the instrument washer. This instrument washer is for washing test instruments such as test tubes, beakers, and flasks, and its appearance is constituted by a cabinet 1. A door 2 that can be opened and closed is attached to the upper front portion of the cabinet 1. Inside the door 2, a cleaning tank for accommodating the test device is formed.

At the upper part of the door 2, there is provided a latch 3 for operating when the door 2 is opened. Latch 3
Functions as a stopper when the door 2 that has been opened is closed, and also functions as a door switch that detects opening and closing of the door 2. A display panel 4 is provided on the left side of the central portion of the door 2. On the display panel 4, as will be described later,
Various indicators are arranged. An operation panel 5 is provided on the right side of the display panel 4. The operation panel 5 is provided with various operation keys for inputting operation signals, as will be described later. Further, a power switch SW is provided on the right side of the operation panel 5.

At the bottom of the door 2, there is provided a transparent glass window 6 through which the inside of the instrument washer can be observed from the outside. A service hatch 7 that can be opened and closed is attached to the lower front portion of the cabinet 1. The service hatch 7 is opened by a service person or the like when performing maintenance or repair of the instrument washer.

On the right side surface of the cabinet 1, an earth leakage breaker 8 and a power source 9 dedicated to the pure water pressurizing device are provided.
The pure water pressurizing device-dedicated power supply 9 is a power supply necessary for operating the pure water pressurizing device including a pure water pump for pumping pure water from the pure water tank. FIG. 2 is a schematic perspective view showing the instrument washer with the door 2 removed and a part of the right side surface cut away, mainly for explaining the internal structure of the washing tank.

In the instrument washing machine of this embodiment, the upper rack UR and the lower rack DR for mounting the test instruments to be washed are used. Each of the racks UR and DR is configured as a net-like container in order to spray cleaning water or the like toward the mounted test device. Test equipment is the upper rack U
When mounting on the R or the lower rack DR, the test device is mounted so that the portion to be cleaned faces downward. This is because, as will be described later, wash water or rinse water is jetted upward from the lower side of the upper rack UR or the lower rack DR.

A rail 21a for holding the upper rack UR for setting the upper rack UR in the cleaning tank 20 is attached to the upper left inner wall of the cleaning tank 20. Although not shown, a similar upper rack holding rail is attached to the right inner wall facing the upper rack holding rail 21a. A rail 22 a for holding the lower rack DR for setting the lower rack DR in the cleaning tank 20 is attached to the lower left inner wall of the cleaning tank 20. Although not shown, a rail for holding the lower rack is also attached to the right inner wall facing the rail 22a for holding the lower rack.

When washing the test equipment, the user places the test equipment on the upper rack UR or the lower rack DR, and holds the upper rack UR or the lower rack DR on the rails 21a for holding the upper rack or the lower rack, respectively. Set on the rail 22a for use. Below the upper rack UR, an upper nozzle 23 for injecting washing water or the like upwards onto a test device placed on the upper rack UR is provided.
It is mounted rotatably with respect to. A plurality of upper injection ports 23 a are arranged on the upper surface of the upper nozzle 23.
A plurality of lower injection ports (not shown) are arranged on the lower surface of 3, and a propulsion injection port (not shown) is arranged on one side surface of the tip portion of the upper nozzle 23. This propulsion jet is
It is for rotating the upper nozzle 23 in one direction A by the water pressure of the jetted water.

Further, the upper nozzle 23 is provided with a water supply shaft 24 directed upward. When the upper rack UR is set in the cleaning tank 20, the water supply shaft 24 contacts the supply port 25 attached to the ceiling of the cleaning tank 20. The supply port 25 is connected to a second supply pipe described later. Therefore, when wash water or the like is supplied from the second supply pipe to the supply port 25, if the upper rack UR is set on the rail 21a for holding the upper rack, the wash water or the like is supplied to the upper nozzle via the water supply shaft 24. 23, the upper injection port 23a
From the lower injection port and downward. As a result, the upper rack UR
Cleaning water or the like can be sprayed onto the test device mounted on the test equipment, and cleaning or the like can be sprayed onto the test equipment mounted on the lower rack DR.

A lower nozzle 26 for spraying washing water or the like from below onto a test instrument mounted on the lower rack DR is rotatably supported at the lower portion of the washing tank 20. A plurality of upper injection ports 26a are arranged on the upper surface of the lower nozzle 26, and a propulsion injection port (not shown) is arranged on one side surface of the tip portion of the lower nozzle 26. This propulsion injection port is for rotating the lower nozzle 26 in one direction B by the water pressure of the water to be injected. Lower nozzle 2
Cleaning water or the like to be sprayed from 6 is supplied from a first supply pipe described later. When wash water or the like is supplied from the first supply pipe to the lower nozzle 26, the wash water or the like is jetted upward from the upper jet port 26a. Therefore, the lower rack D
Cleaning water or the like can be sprayed onto the test device placed on the R.

FIG. 3 is a view for mainly explaining the supply mechanism of the washing water and the like of the instrument washer. Note that FIG.
Shows the case where both the upper rack UR and the lower rack DR are set in the cleaning tank 20. Cleaning tank 2
The inner wall of 0 has a hot water supply port 30, a water supply port 31, and a pure water port 32.
Are formed with the ejection ports facing downward. A hot water supply pipe 33 connected to a hot water supply pipe (not shown) is connected to the hot water supply port 30. A hot water supply valve 34 is interposed in the hot water supply pipe 33. When the hot water supply valve 34 is turned on, hot water is accumulated in the cleaning tank 20 along the inner wall of the cleaning tank 20 via the hot water supply pipe 33 and the hot water supply port 30.

From the middle of the hot water supply pipe 33, a first detergent supply pipe 35 branches via a first detergent valve 37. A first detergent input port 36 is connected to the tip of the first detergent supply pipe 35. The first detergent input port 36 is a space formed on the inner wall of the cleaning tank 20 to store a detergent for cleaning the test device. When hot water supply valve 34 is turned off and first detergent valve 37 is turned on, hot water is supplied to first detergent input port 36 through hot water supply pipe 33 and first detergent supply pipe 35. As a result, the detergent and the warm water are mixed in the first detergent input port 36 to produce the wash water. The produced cleaning water travels along the inner wall of the cleaning tank 20 and the water tank 27.
Stored in.

A water supply port 31 provided on the inner wall of the cleaning tank 20.
A water supply supply pipe 38 connected to a water supply pipe (not shown) is connected to. A water supply valve 39 is provided in the water supply pipe 38. In this configuration, when the water supply valve 39 is turned on, water flows out from the water supply port 31 through the water supply supply pipe 38, travels along the inner wall of the cleaning tank 20, and is stored in the water storage tank 27.

From the middle of the water supply pipe 38, a second detergent supply pipe 40 branches via a second detergent valve 42. A second detergent input port 41 is connected to a tip portion of the second detergent supply pipe 40. The second detergent input port 41, like the first detergent input port 36, is a space formed on the inner wall of the cleaning tank 20 to store the detergent therein. When the water supply valve 39 is turned off and the second detergent valve 42 is turned on, water is supplied to the second detergent input port 41 via the water supply supply pipe 38 and the second detergent supply pipe 40. As a result, similarly to the above, cleaning water is produced in the second detergent input port 41, and the produced cleaning water is stored in the water storage tank 27 along the inner wall of the cleaning tank 20.

A pure water supply pipe 43 connected to a pure water pressurizing device (not shown) is connected to the pure water port 32. A pure water valve 44 is provided in the pure water supply pipe 43. In this configuration, when the pure water valve 44 is turned on, pure water travels along the inner wall of the cleaning tank 20 via the pure water supply pipe 44 and the water tank 2
Stored in 7. In this embodiment, the water storage tank 27 can store about 9 liters of cleaning water or the like. A water temperature detection thermistor 50 that detects the temperature of the wash water or the like stored in the water storage tank 27 is attached to the water storage tank 27. The water tank 27 also has a loop type heater 51.
Is provided. The heater 51 is for allowing the appliance washer to be installed in a place where a hot water supply pipe is not provided. That is, since it may be preferable to use hot water to wash the test device, if only water at room temperature can be supplied to the washing tank 20,
This is because it is necessary to heat this water with the heater 51.

A drain port 52 is formed at the bottom of the water storage tank 27. One end of an outflow pipe 54 is connected to the drain port 52 via a filter 53 for removing dirt. The other end of the outflow pipe 54 is branched and connected to the inlet side of the circulation pump 55 and the inlet side of the drainage pump 56. A water level detecting device 58 is connected to the other end of the outflow pipe 54 via a float pipe 57. Water level detector 58
Is for detecting the water level of the wash water or the like stored in the water storage tank 27. Details will be described later.

A first supply pipe 59 and a second supply pipe 60 are connected to the discharge side of the circulation pump 55. The first supply pipe 59 is connected to the lower nozzle 26 supported by the water storage tank 27. The second supply pipe 60 is connected to the supply port 25 attached to the upper wall of the cleaning tank 20. In this configuration, when the circulation pump 55 is turned on, the outflow pipe 5
The cleaning water and the like flowing out to the No. 4 are sucked into the circulation pump 55 and discharged from the discharge side of the circulation pump 55 to the first supply pipe 59 and the second supply pipe 60. As a result, the cleaning water or the like is jetted upward from the upper jet port 26a (see FIG. 2) of the lower nozzle 26, and is jetted vertically from the upper jet port 23a and the lower jet port of the upper nozzle 23, respectively.

A drain pipe 61 extending outside the machine is connected to the discharge side of the discharge pump 56. A check valve 62 is provided in the drain pipe 61. The check valve 62 is for preventing overflow water discharged from a second overflow pipe, which will be described later, from flowing back to the drain pipe 61. In this configuration, when the drainage pump 56 is turned on, the wash water and the like that have flowed out to the outflow pipe 54 will not be discharged.
Is sucked into and discharged to the outside of the machine through the drainage pipe 61.

The first overflow pipe 63 is provided outside the cleaning tank 20. First overflow pipe 63
In the overflow rinsing process, which will be described later, is for draining the wash water or the like, which is equal to or higher than a predetermined overflow water level, out of the wash tank 20 among the wash water and the like stored in the water storage tank 27. One end of the first overflow pipe 63 enters the water tank 27 from the bottom of the water tank 27 and forms an intake port 64 at a height corresponding to the overflow water level. The other end of the first overflow pipe 63 is connected to the inlet side of the overflow pump 65. One end of the second overflow pipe 66 is connected to the discharge side of the overflow pump 65. The other end of the second overflow pipe 66 is connected to the drainage pipe 61 via a check valve 62.

In this structure, when the overflow pump 65 is turned on, cleaning water or the like in the water tank 27 above the overflow water level is sucked into the overflow pump 65 via the first overflow pipe 63, and the second overflow pipe 66 and It is drained out of the machine through the drainage pipe 61. An exhaust duct 67 is further attached to the upper part of the cleaning tank 20. The exhaust duct 67 is for exhausting the hot and humid air inside the cleaning tank 20 to the outside of the cleaning tank 20. From the exhaust duct 67, a check valve 62 in which a siphon breaker hose 68 is provided in the drain pipe 61.
Has been extended to. Hose 68 for siphon breaker
Is for preventing excessive drainage from the drain pipe 61 and the overflow pipe 66 due to the so-called siphon phenomenon.

FIG. 4 is a block diagram showing the configuration of an electrical control circuit of the instrument washer. The control circuit is provided with a microcomputer 200 as a control center. Signals from various switches and sensors are given to the microcomputer 200. Microcomputer 2
At 00, control signals are output to various elements and devices based on the applied signals.

Specifically, in response to pressing of various keys provided on the operation panel 5, the corresponding key switch 201
Various setting values are given to the microcomputer 200 from. The outputs of the water temperature detection thermistor 50, the door switch (latch) 3, the regulated water level switch 58i, and the overflow water level switch 58h are given to the microcomputer 200.

The microcomputer 200 gives a segment signal to the remaining time indicator 4a and the temperature indicator 4b provided in the display panel 4 based on the above-mentioned input signals. At the same time, the remaining time indicator 4a and the temperature indicator 4
b, and a control signal is given to the stroke display lamp 4c. Further, a light emitting diode (LED) output is given to the stroke display lamp 4c.

The microcomputer 200 also supplies control signals to the hot water supply valve 34, the water supply valve 39, the first detergent valve 37, the second detergent valve 42, and the pure water valve 44, respectively. As a result, the opening and closing of each valve is controlled.
Further, control signals are given to the overflow pump 65, the drainage pump 56, the pure water pump 202, and the circulation pump 55, respectively. As a result, the suction operation of each pump is controlled. The microcomputer 200 further gives control signals to the heater 51 and the buzzer 203, respectively.

The structure for supplying water to the upper nozzle 23 will be described in detail below. FIG. 5 is a side view showing a state in which the upper rack UR is set in the cleaning tank 20. The water supply shaft 24 is fastened and fixed to the upper rack UR by a double preparation nut 24i, and the upper rack UR is fixed to the cleaning tank 20. When set to, the water intake port 24a provided on the upper portion of the water supply shaft 24 abuts on the supply port 25 attached to the ceiling of the cleaning tank 20 so that cleaning water or the like flows from the supply port 25 into the water supply shaft 24. It is supposed to flow into.

FIG. 6 is a sectional view showing a mounting state of the water supply shaft 24. The supply port 25 attached to the ceiling of the cleaning tank 20 has a tip extending like a horn,
A fixed nozzle 25 a having a triangular pyramid shape like a bell is provided at the center of the inside of the unit 5. This fixed nozzle 25a is
As will be described later, when the upper rack UR is washed without being set in the washing tank 20, the washing water or the like is dispersed and jetted. The lower end surface 25b (see FIG. 7) of the supply port 25 is substantially horizontal and the peripheral portion is tapered.

On the other hand, the water intake port 24a is a double-cylindrical member whose upper ends are joined to each other, and the inner cylinder 24e of this double cylinder is fitted in the water supply shaft 24. An annular spring receiver 24c is fixed to the upper portion of the water supply shaft 24, and a spring 24b is provided there. By contacting the spring 24b with the joint portion of the double cylinder, the intake port 24a is attached upward. I am energetic. In addition, 2
4d is a stopper for preventing the intake port 24a from coming off. The upper end surface 24g (see FIG. 7) of the water intake port 24a is substantially horizontal and the peripheral portion is tapered.

A thread groove is formed in the middle of the water supply shaft 24, and the bottom of the upper rack UR is stopped here by a double adjusting nut 24i. The lower portion of the water supply shaft 24 communicates with the upper nozzle 23, and the lower end of the water supply shaft 24 is adapted to be fitted with the upper nozzle 23 via the nozzle thrust washer 24k and stopped by the bearing knob 24j.

As described above, since the spring 24b biases the water intake port 24a upward with respect to the water supply shaft 24, the water intake port 24a is held slightly above the fixed position. When the upper rack UR is pushed along the rails 21a for holding the upper rack, as shown in FIG. 7, the taper portion of the upper end surface 24g of the water intake port 24a comes into contact with the taper portion of the lower end surface 25b of the supply port 25, When further pushed in, the water intake port 24a slightly sinks as shown by the arrow C, and the lower end surface 25b of the supply port 25 and the upper end surface 24g of the water intake port 24a come into close contact with each other (see FIG. 6). In this state, the intake port 24a is pressed upward by the spring 24b, so that the intake port 24a can oppose the flow of washing water and the like, and the intake port 24a and the supply port 25 are not separated from each other.
Therefore, the washing water and the like are all introduced into the upper nozzle 23 without leaking and are effectively used for washing the test device.

In addition, if the instrument washer is used for many years,
The spring 24b is dented or the upper rack UR is deformed, so that the lower end surface 25b of the supply port 25 and the intake port 24a.
There is a concern that the pressure contact with the upper end surface 24g of the above will not be sufficient, and the cleaning water and the like will leak from there, weakening the jetting force from the upper jetting port 23a and the lower jetting port, leading to a reduction in the washing power. Therefore, in order to cope with such a situation, the upper rack UR can be adjusted again by stopping the upper rack UR with the double adjusting nut 24i. This allows
It is possible to prevent the cleaning water from leaking and maintain the cleaning power without replacing the parts.

Next, the user mounts a large-scale test instrument such as a flask only on the lower rack DR, and the lower rack D concerned.
The operation when R is set on the rail 22a for holding the lower rack will be described. In this case, the upper rack UR becomes an obstacle, so the lower rack DR should be set after removing it. However, when removing the upper rack UR,
Since the water supply shaft 24 fixed to the upper rack UR also comes off at the same time, the supply port 25 is exposed downward from the ceiling of the cleaning tank 20. In the present embodiment, in order to prevent the wash water and the like falling from the supply port 25 from falling vertically, a fixed nozzle 25a that disperses and sprays the wash water and the like is provided in the supply port 25.

FIG. 8 is a view showing the internal structure of the supply port 25, in which the fixed nozzle 25a is screwed to the supply port 25. The cleaning water supplied to the supply port 25 is
The fixed nozzle 25a collides with the fixed nozzle 25a and the angle is widened to be dispersed and ejected. Since the fixed nozzle 25a is screwed to the supply port 25, it is possible to move the fixed nozzle 25a up and down in the supply port 25 by adjusting the screw 25g. The injection angle can be changed. For example, if the test device is placed substantially in the center of the lower rack DR, it suffices to inject the cleaning water or the like directly below, so the fixed nozzle 25a may be moved relatively downward. Also, the test equipment is the lower rack DR
If it is widely placed on almost the entire area, it is necessary to spray the washing water and the like evenly, so the fixed nozzle 25a may be moved relatively upward.

FIG. 9 shows a state during washing when a large-scale test instrument such as a flask is placed only on the lower rack DR and the upper rack UR is removed to perform a washing operation as described above. It is a figure, and the state where the washing water and the like are dispersed and jetted from the supply port 25 is illustrated. A rod-shaped nozzle tube 26c is used to wash the inside by placing a large test device such as a flask on the lower rack DR, but this configuration is known, for example, in Japanese Utility Model Publication No. 63-7342. Has been described.

10 and 11 are cross-sectional views showing another embodiment. In this embodiment, the intake port 24a of the water supply shaft 24 fixed to the upper rack UR does not move up and down, but the supply port 25 attached to the ceiling of the cleaning tank 20 moves up and down by the force of the spring. ing. The supply port 25 is
It is a double-cylinder-shaped member whose lower ends are joined to each other, and the inner cylinder 25d of this double-cylinder is connected to the second supply pipe 60. An annular spring receiver 25f is fixed to the lower end of the second supply pipe 60 (this spring receiver 25f
f also functions as a member for fixing the fixed nozzle 25a with a screw), and a spring 25c is provided therein, and the spring 25c abuts the joint portion of the double cylinder to urge the supply port 25 downward. To do.

On the other hand, the water intake port 24a is a double-cylindrical member whose upper ends are joined to each other, and the inner cylinder 24e of this double cylinder fits into the water supply shaft 24.
The water supply shaft 24 is not floated by a spring as in the embodiment of FIG. 6, but is prevented from moving downward by an immovable stopper 24h. The lower end surface of the supply port 25 is substantially horizontal,
The peripheral portion is formed in a tapered shape, the upper end surface of the intake port 24a is also substantially horizontal, and the peripheral portion is formed in a tapered shape.

Since the structure is as described above, when the upper rack UR is pushed along the rails 21a for holding the upper rack, the taper portion of the upper end surface of the water intake port 24a becomes similar to that shown in FIG. When it comes into contact with the tapered portion of the lower end surface of the supply port 25 and is further pushed in, the supply port 25 is slightly pushed up,
The supply port 25 comes into close contact with the upper end surface of the water intake port 24a (see FIG. 10). In this state, the supply port 2
5 is pressed downward by the spring 25c,
Pressure contact between the lower end surface of the supply port 25 and the upper end surface of the water intake port 24a is sufficiently maintained, it is possible to oppose the flow of washing water and the like, and the water intake port 24a and the supply port 25 are not separated. Therefore, the cleaning water and the like do not leak out, and all of the upper nozzle 2
3 and is effectively used for cleaning the test equipment.

In addition, when the instrument washer is used for many years,
Since the spring 25c is dented or the upper rack UR is deformed, the pressure contact between the lower end surface of the supply port 25 and the upper end surface of the water intake port 24a becomes insufficient, and washing water and the like leak from there, and the upper injection port There is a concern that the injection force from the nozzle 23a and the lower injection port will be weakened and the cleaning power will be reduced. Therefore, in order to deal with such a situation, the double preparation nut 24i is used in the same manner as described above with reference to FIG. By re-stopping the upper rack UR, the intake port 24a can be adjusted up and down.

In this embodiment, when the upper rack UR is removed in order to set and wash only the lower rack DR, the water supply shaft 24 fixed to the upper rack UR also comes off at the same time. The downward stopping force of 24 is lost, and the supply port 25, which is constantly urged downward by the spring 25c, is lowered slightly downward. Therefore Figure 1
As shown in FIG. 1, the position of the fixed nozzle 25a remains the same, and the supply port 25 itself moves relatively downward, so that the interval between the fixed nozzle 25a and the supply port 25 becomes narrow. Therefore, the dispersion angle of the water flow is increased, and the cleaning water or the like is effectively dispersed and jetted.

On the contrary, when the upper rack UR is set and washed, the intake port 24a of the water supply shaft 24 fixed to the upper rack UR abuts the supply port 25, so that the supply port 25 is a spring. It rises upward against the downward urging force of 25c, which widens the gap between the fixed nozzle 25a and the supply port 25 (see FIG. 10). Therefore, the dispersion angle of the water flow is reduced and becomes close to direct current. However, when the upper rack UR is set, it suffices to send the wash water or the like from the supply port 25 to the water supply shaft 24, so that the dispersion of water is not required at all. Rather, it is necessary to send the wash water or the like to the water supply shaft 24 with less resistance, and therefore the fixed nozzle 25a should be located at a position where resistance is as low as possible.

From the above, according to the construction in which the supply port 25 attached to the ceiling of the cleaning tank 20 is moved up and down by the force of the spring, when the upper rack UR is set and cleaned, the resistance is small and the efficiency is high. Cleaning water and the like can be sent, and when the upper rack UR is removed and the cleaning object placed on the lower rack is cleaned, the excellent effect that the cleaning water and the like can be dispersed and jetted can be obtained.

The embodiments of the present invention are not limited to those described above. In the above embodiment,
As the washing machine, an instrument washing machine for washing a test instrument is described as an example, but the present invention can be widely applied to other washing machines such as a dishwashing machine for washing dishes. You can Besides, various design changes can be made within the scope described in the claims.

[0057]

As described above, according to the washing machine of the first aspect, when the uppermost rack or the like is set in the washing tank, the washing water or the like is guided from the supply port to the water supply passage. When the uppermost rack and the like are removed from the cleaning tank, the supply port is exposed and the cleaning water and the like can be dispersed and sprayed onto the object to be cleaned, so the uppermost rack and the uppermost nozzle When cleaning the dishes and test equipment placed on the racks of other tiers after removing the item, the objects to be washed placed on the racks of other tiers can be washed evenly without damage .

Further, according to the washing machine of the second aspect, when removing the rack on the uppermost stage, the nozzle on the uppermost stage can be removed at the same time, and the removing operation becomes simple. Further, according to the washing machine of claim 3, since it is possible to adjust the spraying direction or the spraying angle of the cleaning water or the like sprayed from the supply port, the tableware placed on the rack of another stage. It can be cleaned efficiently according to the position and amount of test equipment.

Further, according to the washing machine of the fourth aspect, when the uppermost rack is set in the washing tank and the supply port comes into contact with the water intake port, the supply port is pushed upward, so that the dispersion is performed. Since the members are relatively lowered, the resistance when guiding the wash water or the like to the water supply shaft is reduced, and the wash water or the like can be smoothly guided to the water supply shaft.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an external configuration of an instrument washer according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the instrument washer with the door removed and a part of the right side surface cut away, mainly for explaining the configuration of the cleaning tank.

FIG. 3 is a diagram mainly illustrating a water channel structure of the instrument washer.

FIG. 4 is a block diagram showing a configuration of an electric control circuit of the instrument washer.

FIG. 5 is a side view showing a state in which the upper rack is set in the cleaning tank.

FIG. 6 is a cross-sectional view showing a state in which an upper rack is set and a water supply shaft is attached.

FIG. 7 is a diagram showing a state in which, when the upper rack is pushed along the rails for holding the upper rack, the upper rack is in contact with the curved portion of the upper end surface of the water intake port and the curved portion of the lower end surface of the supply port. .

FIG. 8 is a view showing an internal structure of a supply port in which a fixed nozzle as a dispersion member is screwed to the supply port.

FIG. 9 is a diagram showing a state during cleaning when a large-scale test device such as a flask is placed only on the lower rack and the upper rack is removed to perform a cleaning operation.

FIG. 10 is a cross-sectional view showing a state in which an upper rack is set and a water supply shaft is attached in a configuration in which a supply port attached to the ceiling of a cleaning tank moves up and down.

FIG. 11 is a cross-sectional view showing the internal structure of a supply port that moves up and down by the force of a spring.

[Explanation of symbols]

 20 cleaning tank 23 upper nozzle 23a upper injection port 24 water supply shaft 24a water intake 25 supply port 25a fixed nozzle 25c spring 25g screw 26 lower nozzle 26a upper injection port 27 water tank UR upper rack DR lower rack

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tetsuo Sakane 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Takenari Yuki 2-chome, Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5-5 Sanyo Electric Co., Ltd.

Claims (4)

[Claims] 1. A plurality of nozzles are provided in a cleaning tank, objects to be cleaned are placed on racks set in the cleaning tank in a plurality of stages, and cleaning water is sprayed from the nozzles for cleaning. In a washing machine that can be used, a supply port for supplying cleaning water, etc. is attached to the ceiling of the cleaning tank, and water is supplied from the supply port to the uppermost nozzle with the top rack set in the cleaning tank. A water supply channel is provided, and when the top rack, the nozzle and the water supply channel at the top are removed from the supply port to wash the objects to be cleaned placed on the racks at other stages, the cleaning water is dispersed. A washing machine provided with a dispersion member capable of being sprayed. 2. The uppermost nozzle can be set in a cleaning tank integrally with the uppermost rack, and the water supply passage is
It is a water supply shaft connected to the uppermost nozzle, and a water intake port that is elastically pressure-contacted with the supply port in the state where the uppermost rack is set in the washing tank is attached to the tip of the water supply shaft. The washing machine according to claim 1. 3. The washing machine according to claim 1, wherein the dispersion member provided at the supply port is capable of adjusting the direction or angle of spraying washing water or the like. 4. The dispersion member has a bell-shaped shape with a widened bottom and is fixed to a ceiling portion in the cleaning tank, and the supply port is vertically movable on the ceiling portion in the cleaning tank. The washing machine according to claim 2, wherein the washing machine is attached, and the supply port is pushed up by coming into contact with the water intake port with the uppermost rack set in the washing tank.