JP4994081B2 - Dishwasher - Google Patents

Description

  The present invention relates to a technique for an apparatus for cleaning dishes.

  In facilities that need to supply a large amount of food at one time, such as school lunch centers that provide meals to school facilities, medical facilities, nursing care facilities, etc. Since used dishes such as cups, chopsticks, knives, forks and trays are collected, there is a need for an automatic dishwashing device for efficiently washing them.

  As an automatic dishwashing apparatus in the prior art, the following is disclosed. The automatic dishwashing apparatus disclosed in Patent Document 1 immerses the tableware stored in the tableware basket in the immersion tank together with the tableware basket to soften the potatoes adhering to the tableware, and then removes them with a shower nozzle. It is what you wash.

In the automatic dishwashing apparatus disclosed in Patent Document 2, a dish containing water particles accelerated by ultrasonic vibrations without immersing the dishes in a dipping bath is viewed from the slits in the dishware basket. The dishes are washed by pouring them down.
JP-A-5-269073 JP-A-9-108160

  However, in the tableware washing apparatus described in Patent Document 1, it is necessary to have an immersion bath area and a shower area, and it is difficult to make the apparatus compact. In addition, in order to apply washing water to all the dishes in the shower area, the dishes contained in the dish basket must be arranged so as not to overlap each other at a predetermined interval. The number of tableware that can be accommodated is small and the work efficiency is reduced.

  Moreover, in the dishwashing apparatus of patent document 2, as an action force with respect to tableware, the first action force with which the wash water which flowed down by the head pressure and gravity of washing water collides with tableware is included in the water curtain. A second acting force by cavitation on the surface of the tableware by ultrasonic vibration of the accelerated water particles is described. Cavitation is a phenomenon in which a low-pressure part of a liquid (such as water) that flows at high speed vaporizes, creating a pocket of steam in a very short time, and crushing and disappearing in a very short time. . When the dishes are washed by the first acting force and the second acting force (cavitation acting force), it is possible to remove a certain amount of dirt attached to the dishes.

  However, when tableware is washed with a dishwashing apparatus, it is usually several hours after the meal is finished, and the cooked rice is stuck with solid rice. The action force as in Patent Document 2, or the rice cooked solidly by sticking to the dishes only with the jet of water, even if it tries to remove the dirt by spraying the washing water with high water pressure like other prior art Was firmly attached to tableware and difficult to remove. In order to remove the cooked rice stuck to such dishes, the cooked cooked rice must be sufficiently softened by dipping in a dipping tank or the like, and then removed.

The tableware washing apparatus according to claim 1, wherein a tableware basket in which a plurality of tableware are stacked and stored is conveyed in a moving direction with the opening surface of the tableware in the tableware basket directed in the moving direction. And a water outlet that has a longitudinal direction in the width direction of the conveyor and is formed in a slit shape that opens downward, and sprays cleaning water from above the conveyor toward the dishes in the tableware basket. The tableware baskets are arranged along the stacking direction of the tableware, and a plurality of the tableware baskets are arranged so that the opening surface of one tableware adjacent to each other leans against the surface opposite to the opening surface side of the other tableware. It has a plurality of guide pipes that support the outer edge located below the center of gravity of the stacked dishes, and the water outlet has a plurality of dishes so that the opening surface is substantially perpendicular to the conveyor surface. Overlapping with ease For the tableware basket stored in a state in which the movement of the tableware is allowed, the gravity moment applied to the tableware in at least the storage state between the adjacent tableware that is overlapped with the transfer of the tableware basket. Applying a moment in the opening direction, which is a large reverse rotation moment, and moving the tableware to create a gap, and by creating a strong water flow in this gap, the residue remaining on the tableware can be washed away from the tableware As described above, a dishwashing apparatus that forms a large amount of washing water flow that fills the gap from above the conveyor, has the water outlet, is formed into a rectangular square tube, and the axis of the rectangular tube A water pipe whose core is directed in a direction crossing the conveyor is provided in the water pipe so that a space is formed between the water pipe and opened upward. A cross-sectionally U-shaped baffle plate, wherein the water supply pipe is positioned above the baffle plate, an inlet for allowing cleaning water to flow into the water supply pipe, and a position below the baffle plate And an outlet for allowing the cleaning water to flow into the water outlet, and the cleaning water flowing into the water supply pipe from the inlet is once received by the baffle plate and then overflows from the baffle plate Then, it flows down from the water outlet through the gap and the outlet .

The dish washing apparatus according to claim 2 is the dish washing apparatus according to claim 1, wherein the length of the slit-shaped water outlet in the longitudinal direction is substantially the same as the conveyor width of the conveyor.

  The dish washing apparatus according to claim 3 is the dish washing apparatus according to claim 1 or 2, wherein the amount of water for washing flowing down from the water outlet is about 0.6 liter / minute · millimeter or more.

  The dish washing apparatus according to claim 4 is provided with an injection nozzle that injects cleaning water from a lower part of the conveyor in a direction opposite to the traveling direction of the conveyor in the dish washing apparatus according to any one of claims 1 to 3. Is.

Dishwashing apparatus 請 Motomeko 5 wherein, in the dishwashing apparatus according to any one of claims 1 to 4, the drainage port drainage opening width is made adjustable.

The tableware washing apparatus according to claim 6 is the tableware washing apparatus according to claim 5, wherein the water outlet is formed by an adjustment plate that adjusts the width of the water outlet.

The dish washing apparatus according to claim 7 is the dish washing apparatus according to any one of claims 1 to 6, wherein a gap is formed at a lower portion of the baffle plate between the lower portion of the baffle plate and the water supply pipe. The protrusion is provided.

  According to the present invention, by causing a large amount of washing water flow to act on the tableware, the same effect as when the tableware is immersed in the immersion tank can be obtained without providing the immersion tank. For this reason, since a complicated structure is not required compared with the tableware washing apparatus at the time of providing an immersion tank, an apparatus can be reduced in size. In addition, the tableware basket transported by the conveyor of the tableware washing apparatus can store and store the tableware to be stored, if there is some margin, and ensure that each tableware that is stacked is stored one by one. Therefore, working efficiency can be greatly improved by using this tableware washing apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the spirit of the present invention. The first embodiment will mainly describe claims 1, 2, 3, and 4.

Embodiment 1
(Concept of Embodiment 1) FIG. 1 shows a conceptual diagram of a tableware washing apparatus of this embodiment. The tableware washing apparatus includes a water outlet (0102) that generates a large amount of water for washing from above the conveyor for the tableware (0105) stored in the tableware basket (0104) transferred by the conveyor (0101). It is characterized by.

  (Configuration of Embodiment 1) As shown in FIG. 1, the tableware washing apparatus has a conveyor (0101) and a water outlet (0102). Moreover, in this tableware washing apparatus, you may provide the injection nozzle (0103) below a conveyor. In the tableware washing apparatus shown in FIG. 1, only the structure of the characteristic part in this embodiment is described, and other structures included in a general dishwashing apparatus are omitted, but a specific example (FIG. 8) described later. Other configurations may be provided as shown in FIG.

  (Description of Configuration of Embodiment 1) The “conveyor” (0101) is configured to transfer a tableware basket. The “tableware basket” (0104) is a basket storing the tableware (0105). Tableware is tableware such as plates, bowls, small bowls, cups, chopsticks, knives, forks, spoons and trays. The tableware basket in the present embodiment is particularly effective for cleaning dishes that can be stacked mainly on plates, bowls, small bowls, and the like.

  The “water outlet” is a tableware basket in which a plurality of dishes are stacked and stored with a slight margin so that the opening surface is substantially perpendicular to the conveyor surface. A gap is created by applying an opening moment between other adjacent dishes, and a strong water flow is generated in the gap so that the residue remaining on the dishes can be washed away from the top of the conveyor. It is configured to form a large amount of cleaning water flow. As shown in FIG. 1, the water flowing down from the water outlet may be supplied by pumping the water in the washing water tank (0106) to the water outlet with a pump (0107) or the like. For example, a tank may be installed and supplied using the potential energy of the cleaning water.

  2 to 4 are diagrams for explaining the water outlet in detail. FIG. 2 is an example of a cross-sectional view showing the structure of the water outlet. 3 and 4 show an example of a specific configuration of the water outlet.

  The structure of the water outlet (0201) shown in FIG. 2 is such that the wash water supplied by a pump or the like does not flow directly from the water supply pipe (0202) but is received by a baffle plate (0203) having a U-shaped cross section. Yes. The baffle plate is provided with a gap from the housing of the water supply pipe so that the wash water overflowed from the baffle plate flows down from the water outlet. By setting it as such a structure, the water pressure in a water supply pipe can be equalize | homogenized and, thereby, a uniform water flow can be flowed down from a water outlet. The water outlet width (width indicated by A in FIG. 2) is preferably wider than 1.5 mm, more preferably about 2 mm to 8 mm in order to allow a large amount of washing water to flow down. The water outlet width A can be adjusted by forming the adjusting plate (0204). At this time, it is desirable that the outlet of the water supply pipe is wider than the maximum width of the water outlet width A that can be adjusted by the adjusting plate so that the outlet (0205) of the water supply pipe does not become a bottleneck.

  FIG. 3 is an upper perspective view (FIG. 3 (a)) and a lower perspective view (FIG. 3 (b)) of a water supply pipe having a water outlet. 4 is a top view of a water pipe having a water outlet (FIG. 4 (a)), a side view (FIG. 4 (b)) seen from the direction AA of FIG. 4 (a), and a bottom view of the water pipe ( FIG. 4 (c)). In FIG. 4, the internal structure is represented by a dotted line.

  As shown in FIG. 2, the wash water flowing in from the two inlets (0302a, 0402a) of the water supply pipes (0302, 0402) is temporarily received by an internal U-shaped baffle plate (0403). Therefore, the overflowed structure flows out from the water outlets (0301, 0401).

  The water outlet is formed by an adjusting plate (0303, 0404) that adjusts the width of the water outlet, and the wash water flowing out from the outlet of the water supply pipe is adjusted by the adjusting plate and flows down. The adjustment plate is composed of two plates provided with adjustment margins (0304, 0405) in the same direction, and the water outlet width can be adjusted in accordance with the fixed position of the adjustment margin overlapped.

  Further, it is desirable that the depth of the water outlet (length L in FIG. 3) is substantially the same as the conveyor width. Thereby, even if it arrange | positions the tableware basket to any position of a conveyor, it is possible for the washing water to flow down uniformly with respect to the tableware basket.

  A protrusion (0406) is provided at the lower part of the baffle plate (0403), and a gap is formed between the lower part of the baffle plate and the housing of the water supply pipe. The baffle plate is fixed to the water supply pipe at the side so that the arrangement position does not shift due to the impact of flowing water.

  The amount of cleaning water that flows down from the water outlet (hereinafter referred to as “the amount of cleaning water”) needs to be a large amount of water. As an example, when the depth length L of the water outlet is reduced to 630 mm and the width of the water outlet is reduced to 2 to 3 mm, the amount of water for washing of about 390 liters per minute flows from the water outlet. At this time, the amount of cleaning water flowing from the water outlet per unit length of the water outlet is 390/630 = 0.61 liters / minute / millimeter, and as the width of the water outlet widens, per unit length of the water outlet The amount of water flowing down increases. Thus, it is desirable that the amount of cleaning water flowing down from the water outlet is about 0.6 liter / minute · millimeter or more per unit length of the water outlet. However, the amount of cleaning water flowing from the water outlet is not limited to these values.

  As shown in FIG. 1, a plurality of tableware stored in the tableware basket are stored with being overlapped with some margin so that the opening surface is substantially perpendicular to the conveyor surface. “Open surface of tableware” refers to the surface of the table on which food is served. “Conveyor surface” refers to the upper surface of the conveyor (0101). “Storing and stacking with some allowance” means that one or two dishes are stored in a table in a state where a plurality of dishes are stacked and stored without gaps so that the opening surface is substantially perpendicular to the conveyor surface. It means that it is pulled out to the extent that it is allowed to move about 1 to 2 dishes. By stacking and storing with some allowance in this way, the opening surface of the tableware is not strictly perpendicular to the conveyor surface, but is stored in a state slightly inclined from the vertical direction. Note that the tableware basket placed on the conveyor is transferred in the direction of the arrow shown in FIG. 1 with the opening surface of the stored tableware oriented in the traveling direction of the conveyor.

  FIG. 5 schematically shows a state where a moment in the opening direction is applied to the adjacent tableware (0503) which is overlapped with the transfer of the tableware basket (0502) by the water flow from the water outlet (0501). Represents. As shown in FIG. 5 (a) to FIG. 5 (b), in accordance with the transfer of the tableware basket, the tableware in which the tableware baskets are piled up one after another is washed by the water flow from the waterfall port, and the last tableware is moved from the water outlet. As it passes, all dishes are washed.

  Next, the force which applies the opening moment concerning tableware is demonstrated. FIGS. 6 (a) to 6 (c) show a moment in the opening direction between other adjacent tableware that is overlapped with the transfer of the tableware basket by the cleaning water flow from the water outlet. It is a figure explaining a mode. First, as shown in FIG. 6 (a), when the tableware is stored in the tableware basket, gravity mg acts on the weight m applied to the tableware itself. For this reason, when trying to separate the tableware from other adjacent tableware, the moment M1 due to the gravity of the tableware (hereinafter referred to as “gravity moment”) is based on the point O where the tableware is in contact with the lower surface of the tableware basket. The force in the rotational direction to return to the center of gravity acts on the center of gravity.

  On the other hand, FIG. 6B shows the force that the cleaning water flow that has flowed down from the water outlet acts on the tableware. The washing water flowing down from the water outlet has a predetermined momentum because the potential energy from the water outlet to the tableware changes to kinetic energy at the time of collision with the tableware. And when washing water collides with tableware, the momentum of washing water changes with this shock. The change in momentum per unit time at this time becomes equal to the force that the washing water acts on the tableware. Assuming that the mass of the washing water is mo and the velocity before and after the collision is v and v ′, respectively, the acting force F from the washing water to the tableware is obtained by F = (mov−mov ′) / Δt. The acting force F is decomposed in a direction perpendicular to the collision surface and in a horizontal direction, and a component F1 perpendicular to the collision surface acts on the tableware.

  In addition, the table has a different area between the opening and the bottom (0602) so that food is not spilled, and the area of the bottom is usually smaller than the area of the opening, so the side (0601) It is inclined from the opening to the bottom. For this reason, when the force F1 from the washing water acts on the side surface portion, as shown in FIG. 6C, a moment acting in the direction opposite to the gravity moment is generated. In addition, the wash water that has collided with the tableware then flows down along the side of the tableware, but at this time, the wash water flows down so as to spread between other adjacent tableware. The force that acts to spread the washing water between other dishes also acts as a moment. Therefore, by flowing a large amount of washing water against the tableware, a moment in the opening direction is generated between other tableware and a gap is created. Thus, since the tableware is rotated and rotated by the moment force, the gap can be easily formed even when the tableware stored in the tableware basket is heavy. For this reason, this tableware washing apparatus can use not only lightweight tableware such as resin and aluminum, but also heavy tableware such as ceramic and glass.

  It is desirable to adjust the cleaning water flow so that the moment generated by the cleaning water flow to form the gap is a moment in the reverse rotation direction that is at least larger than the gravitational moment applied to the tableware in the stored state. By doing in this way, a clearance gap can be reliably formed between other tableware.

  When a moment of gravity and a reverse rotation direction are generated in the tableware, the tableware rotates and stops until it overlaps with the tableware on the opposite side as the tableware leaned against, as shown in FIG. The gap formed at this time is a slight gap, and a large amount of cleaning water flow flows into this gap, so that the gap is filled with the cleaning water flow. In this way, the tableware rotates and moves one by one, and the gap between the adjacent tableware is filled with a large amount of washing water at that time, so that the tableware can be reliably washed one by one. it can. Furthermore, since a large amount of washing water is poured into the gap between the tableware and the tableware, the stacked tableware can be cleaned regardless of the size and shape of the tableware.

  The cleaning water flow that flows from the water outlet does not necessarily have to flow down at a high pressure. Rather, when sprayed at a high pressure as in the prior art spray nozzle, a gap is easily formed between the tableware and the tableware, but the washing water only passes through vigorously, and there is no gap formed between the tableware and the tableware. It will not be filled with wash water. For this reason, the amount of water that flows down is important for the cleaning water flow that flows from the water outlet, not the water pressure. That is, the washing water flowing down from the water outlet needs to have a sufficient amount of water so as to fill a gap formed between the tableware and the tableware at least over the entire opening surface of the tableware. In addition, the washing water is allowed to flow from the water outlet to the tableware like a waterfall so that the gap formed between the dishes is completely filled with the washing water. In this way, the gap is filled with a large amount of cleaning water flow, so that a state similar to the state where the tableware is immersed in the immersion tank can be created. Thereby, the solidified cooked rice stuck to the tableware can be softened without providing an immersion tank. Furthermore, when a plurality of water outlets are arranged in parallel, it is more effective because a continuous immersion state can be created and the cleaning action can be improved.

  Further, since a large amount of cleaning water flow flows into a small gap, a very strong water flow can be generated. In addition, the side surface is slanted so as not to spill food on the tableware, and the water flow is generated along the inclination of the side surface where the two tableware forming the gap face each other. Water can be efficiently applied to the tableware, and the residue remaining on the tableware can be washed away from the tableware.

  The “injection nozzle” (0103) is provided so as to inject cleaning water from below the conveyor in the direction opposite to the traveling direction of the conveyor. The water outlet can generate a strong water flow in the gap between the stacked tableware stored in the tableware basket, but a strong water flow is generated on the opening surface side of the first tableware stacked. I can't. Therefore, by washing water for washing from the lower side of the conveyor in the direction opposite to the moving direction of the conveyor, the opening side of the leading tableware can also be washed. In the lower part of the conveyor in FIG. 1, only a part of the injection nozzles are directed in the direction opposite to the conveyor traveling direction. A spray nozzle oriented perpendicular to the conveyor is used to clean the bottom of the tableware basket.

  Even if no injection nozzle is provided, it is not necessary to clean the opening side of the top tableware by arranging the already cleaned tableware at the top of the stacked tableware. It is also possible to solve the problem that the opening side is not cleaned.

  (Specific Example of Embodiment 1) FIG. 8 is a side sectional view showing a specific example of a tableware washing apparatus using the present invention. This tableware washing apparatus is arranged in the order of the charging unit (0801), the main cleaning unit (0802), the finishing cleaning unit (0803), and the discharging unit (0804) from the charging side, and the tableware basket is discharged from the charging unit to the discharging unit. It is comprised with the conveyance means (0805) conveyed to.

  (Conveying means) The conveying means (0805) is composed of a conveying conveyor having a conveying surface (0806) on which a starting end portion is arranged on the input portion side and a terminal end portion is arranged on the discharging portion side and the tableware basket is placed and conveyed. . The transport conveyor is composed of a conveyor wound around a drive shaft (0807) on the input side and a drive shaft (0808) on the discharge side, and the conveyor is rotated by driving of the drive motor. . The conveyor is composed of a pair of left and right chain conveyors, and a lot bar in which the left and right chain conveyors are connected at a predetermined interval along the rotation direction of the conveyor.

  (Main cleaning section) The main cleaning section (0802) includes a cleaning chamber (0809) for cleaning the tableware being conveyed with cleaning water, and a main cleaning tank (0810) for recovering the cleaning water used in the cleaning chamber. Have. In the cleaning chamber, there are an upper cleaning pipe (0811) comprising a water supply pipe above the transport surface of the transport conveyor, a lower cleaning pipe (0812) below the transport surface, and cleaning water to the main cleaning tank near the upper portion of the cleaning chamber. And a cleaning water supply port (0813) for supplying water.

  The washing water supply port (0813) is connected to the purified water outlet (0827) and is used to supply washing water to the main washing tank before operating the dishwashing apparatus. An end of the cleaning water supply port can be opened downward, and a rotary cleaning nozzle for cleaning the cleaning chamber can be attached and detached. The rotary washing nozzle is attached to the washing water supply port during the maintenance of the dishwasher (when washing the dishwasher itself), and the washing room itself is sprayed from the rotary washing nozzle onto the inner surface of the washing room. Can be washed.

  The upper cleaning pipe (0811) includes a water outlet (0814) through which the pumped cleaning water flows out and a baffle plate (not shown) through which the cleaning water from the water outlet uniformly flows out. The water outlet is opened in the form of a long and narrow slit toward the lower side so that the opening width can be varied. The baffle plate has a U-shaped cross section, and is provided in the lengthwise direction in the upper cleaning pipe with the recess facing upward, and the gap between the outer surface of the baffle plate and the inner surface of the upper cleaning pipe is 3 to 5 mm. The upper cleaning pipe is formed in a rectangular rectangular tube shape, and a plurality of tubes are arranged in parallel along the conveying conveyor with the axis of the rectangular tube being directed in a direction crossing the conveying conveyor. The cleaning water pumped into the upper cleaning pipe flows from above the upper cleaning pipe, and once it flows into the recess of the baffle plate, the cleaning water that overflows from the recess of the baffle plate enters the water outlet. As a result, the washing water flowing out from the slit-like water outlet can flow out uniformly over substantially the entire width of the conveyor.

  The lower cleaning pipe is provided with a plurality of spray nozzles (0815) for spraying the pumped cleaning water upward. By spraying the cleaning water sprayed from the lower cleaning pipe toward the tableware being conveyed from below, it is possible to remove dirt from the portion located below the tableware. Moreover, even if the leftovers washed off from the tableware are caught in the tableware basket and remain, the washing water sprayed from below will wash it off. Some spray nozzles of the lower cleaning pipe are configured such that the cleaning water is sprayed toward the opening surface of the tableware that is transported with the opening surface directed in the transport direction. Thereby, it becomes possible to wash | clean also about the opening surface of the tableware arrange | positioned at the head of a tableware basket.

  The main cleaning tank includes a pump (0816) for pumping the cleaning water in the main cleaning tank to each cleaning pipe, and a heating means (not shown) for heating the cleaning water in the tank. The heating means is composed of steam or an electric heater. The washing water in the main washing tank is heated and adjusted by the heating means so that it becomes hot water of about 60 ° C. Further, the cleaning water in the main cleaning tank contains a detergent, and a necessary amount of detergent is supplied so that the detergent concentration becomes a constant concentration.

  A reduction nozzle (0817) for injecting the final cleaning water used in the final cleaning section toward the main cleaning chamber is disposed on the side of the main cleaning chamber. The reduction nozzles are arranged above and below the conveyance surface, respectively, and finish cleaning water used in the finishing cleaning section is returned to the main cleaning chamber and is also sprayed to the tableware for cleaning. For this reason, the finish cleaning water with relatively little dirt used in the finishing cleaning chamber can be reused in the main cleaning chamber.

  (Finishing Washing Unit) The finishing washing unit (0803) has a finishing washing room (0818) for washing the tableware being conveyed with the finishing washing water, and a finishing washing tank for collecting the finishing washing water used in the finishing washing room ( 0819). The finishing cleaning chamber has an upper finishing cleaning pipe (0820) made of a water supply pipe above the transport surface of the transport conveyor, a lower finishing cleaning pipe (0821) below the transport surface, and a finish cleaning near the top of the finishing cleaning chamber. And a finishing cleaning water supply port (0822) for supplying finishing cleaning water to the tank.

  The finishing washing water supply port (0822) is connected to the purified water outlet (0827) and is used to supply finishing washing water to the finishing washing tank before operating the dish washing apparatus. The end of the finish cleaning water supply port can be opened downward, and a rotary cleaning nozzle for cleaning the finish cleaning chamber can be attached and detached. The rotary washing nozzle is installed in the finish washing water supply port during maintenance of the dishwasher (when washing the dishwasher itself), and finished by spraying clean water from the rotary washing nozzle to the inner surface of the finish washing room. The cleaning chamber itself can be cleaned.

  The upper finishing cleaning pipe (0820) is composed of a water outlet (0823) through which the pumped finishing cleaning water flows out and a baffle plate (not shown) through which the finishing cleaning water from the water outlet uniformly flows out. . The water outlet is opened in the form of a long and narrow slit toward the lower side so that the opening width can be varied. The baffle plate is formed in a U-shaped cross section, and is provided in the length direction in the upper finish cleaning pipe with the concave portion facing upward, and the baffle plate is formed between the outer surface of the baffle plate and the inner surface of the upper finish cleaning pipe. The gap is about 3 to 5 mm. The top finishing cleaning pipe is formed in a rectangular square tube shape, and a plurality of tubes are arranged in parallel along the transport conveyor with the axis of the square tube being directed in a direction crossing the transport conveyor. The finishing cleaning water that is pumped into the upper finishing cleaning pipe flows from above, and once it flows into the recess of the baffle plate, the finishing cleaning water that overflows from the recess of the baffle plate is passed to the water outlet. By making it flow, the finishing washing water flowing out from the slit-like water outlet can flow out uniformly over substantially the entire width of the conveyor.

  The lower finishing cleaning pipe (0821) is provided with a plurality of injection nozzles (0824) that inject the pumped finishing cleaning water upward. Further, in a part of the lower finish washing pipe, the spray nozzle is directed in an obliquely upward direction facing the tableware being conveyed. Finish wash water sprayed from the bottom finish wash pipe sprays from below the tableware that is being transported to remove dirt from the lower part of the tableware, and leftovers washed away from the tableware, etc. However, even if it is caught in the tableware basket, the finish washing water sprayed from below is washed away. A part of the spray nozzles of the lower finishing cleaning pipe is configured such that the finishing cleaning water is sprayed toward the opening surface of the tableware that is transported with the opening surface directed in the transport direction. Thereby, it becomes possible to wash | clean also about the opening surface of the tableware arrange | positioned at the head of a tableware basket.

  The finishing cleaning tank (0819) includes a pump (0825) for pumping the finishing cleaning water in the finishing cleaning tank to each finishing cleaning pipe and the reduction nozzle, and heating means (not shown) for heating the finishing cleaning water in the tank. And. The heating means is composed of steam or an electric heater. The finishing cleaning water in the finishing cleaning tank is heated and adjusted so that it becomes hot water of about 70 to 80 ° C. by the heating means.

  A finishing nozzle (0826) through which purified water is jetted is disposed at the end of the finishing cleaning chamber on the discharge side. The finishing nozzles are connected to the purified water outlet (0827) and are respectively disposed above and below the conveying surface, and perform final finishing washing processing by spraying the purified water onto the tableware that has been finished and washed by the finishing washing section.

  (Tableware basket) FIG. 9 illustrates a tableware basket. The tableware basket is formed of a circular rod-shaped pipe (0901). The tableware can be supported with the opening surface of the tableware facing sideways and a plurality of stacked tableware. A plurality of guide pipes (0902) are arranged in parallel in the stacking direction of the tableware, and the tableware is supported so that the outer edge of the tableware is stopped by a gap formed by the plurality of guide pipes. . Tableware stacked in a state of being supported so as not to fall down is stored so as to have an interval of about one to two pieces of tableware from a state in which the tableware is stored in the tableware basket without gaps. In order to wash a plurality of tableware stored in the tableware basket, the tableware basket is placed on the transport surface of the transport conveyor so that the opening surface of the tableware faces the transport direction of the transport conveyor.

  (Operation of the dishwasher) The tableware used in the school lunch etc. is stored in the tableware basket so that the same kind is piled up and collected. The tableware in the dishwasher that is cleaned by the dishwasher is stored in such a way that it does not rattle when multiple stacks are made so that the opening surface is substantially perpendicular to the bottom of the tableware basket. The tableware basket is positioned in the input part of the dishwasher so that the opening surface of the stacked tableware is directed to the transport direction of the transport conveyor. It is placed on the transport surface start end side of the transport conveyor. At this time, since the tableware stored in a stacked manner does not largely tilt in the tableware basket, the tableware is conveyed into the main washing chamber while maintaining a state substantially perpendicular to the conveyance surface of the conveyance conveyor.

  The washing water used in the main washing room is maintained at about 60 ° C. and is mixed with a detergent so as to easily remove dirt adhering to the tableware. The tableware in the tableware basket transported to the main washing room is transported in parallel to the upper surface of the transport surface, and the upper cleaning pipe has a slit-shaped water outlet and the lower cleaning in parallel. Washing is performed with washing water sprayed from the spray nozzles of the pipes.

  A large amount of washing water flows down in a strip shape from substantially the entire width of the conveyor from the slit of the upper washing pipe. When a plurality of stacked dishes pass through the strip-shaped wash water that flows down from above, the wash water flows between the stacked dishes and the dishes, so that there is a gap between the dishes. Opens to form a gap, and a large amount of washing water enters the gap. At this time, since the washing water that flows down from the water outlet is larger than the formed gap, the washing water flows down in a state where the gap is filled with the washing water. The dirt adhering lightly is washed away by the water flow generated along the entire inner surface of the tableware, and the dirt that is stuck is softened by the penetration of the filled washing water. By providing the slit-shaped spout of the upper cleaning pipe continuously, the washing water can be continuously infiltrated into the sticking dirt, so the same effect as when the tableware is immersed in the immersion tank. can get.

  In addition, the stacked tableware passes through the belt-like washing water flowing down from the upper water outlet, and the washing water from the jet nozzle is jetted from below, so the washing water from above cannot be washed off. Dirt located below the tableware can also be washed away. Moreover, even if leftovers (for example, shredded cabbage) that have been washed away by a large amount of washing water from above are caught on the tableware basket, they are removed by washing water sprayed from below.

  As the tableware is transported, the position of the washing water received by the tableware will gradually shift, and the gap between the tableware that has been opened so far is closed and the next tableware is positioned. Wash water begins to flow down. As a result, gaps are successively formed one after another between the tableware on which a plurality of sheets are stacked. The space between the newly formed tableware and the tableware is filled with the cleaning water in the same manner as the tableware that has already passed through the strip-shaped cleaning water portion, and the dirt lightly adhering to the inner surface of the tableware enters the space. However, it is washed away by a large amount of washing water, and the washing water penetrates to the dirt that is stuck. The tableware is washed by forming a gap between the adjacent tablewares stacked in this manner and allowing a large amount of washing water to enter.

  In this way, the stacked dishes are transported through the cleaning chamber, and a large amount of strip-shaped cleaning water and sprayed cleaning water from below are continuously sprayed many times from the top. As for the dirt which stuck to the inner surface of the tableware, the washing water gradually permeates and is swollen, and is washed away by the flow of the washing water.

  The finishing washing room is almost the same in structure as the main washing room, so that the tableware is subjected to the same action as the main washing part. However, the washing water used in the finishing washing room uses hot water of 70-80 ° C, and the washing water in the main washing room adhering to the tableware is washed off and the temperature of the tableware is raised to facilitate drying after washing. doing. In addition, for the tableware that is located at the head of the stacked tableware and the opening surface is on the front, the spray nozzle is set diagonally upward in a part of the lower finish washing pipe in the diagonally upward direction facing the tableware being conveyed. The cleaning water is sprayed from the upper part to the lower part of the opening surface while the tableware is transferred and approaches the spray nozzle, so that the entire inner surface is cleaned.

  (How to use washing water) The washing water supply port, the finishing washing water supply port and the finishing nozzle are connected to the purified water outlet, and before the operation of the dishwasher, the washing water is supplied from the washing water supply port to the washing tank. Purified water is supplied from the supply port to the finishing washing tank. When the washing tank and the finishing washing tank are filled with clean water, the dishwasher is ready for operation. During dish washing, which is the operation state of the dish washing apparatus, clean water is basically supplied only from the finishing nozzle.

  The purified water supplied from the finishing nozzle is used for the final finishing washing process of the tableware, and then flows into the finishing washing tank. The finishing cleaning tank overflows when an amount of finishing cleaning water exceeding an allowable amount flows, and does not exceed the allowable amount. Then, the finishing cleaning water in the finishing cleaning tank is pumped to the finishing cleaning pipe and the reduction nozzle by a pump.

  The finishing cleaning water pumped to the finishing cleaning pipe flows down from the water outlet above the conveyor to which the tableware is transferred, and the finishing cleaning water that has flowed down is used for the finishing processing of the tableware and flows into the finishing cleaning tank again. The finishing cleaning water that has flowed into the finishing cleaning tank is used again as finishing cleaning water.

  The finish cleaning water pumped to the reduction nozzle is sprayed toward the cleaning chamber of the main cleaning unit and flows into the main cleaning tank of the main cleaning unit. The finished cleaning water that has flowed in is used again as cleaning water. Wash water in the main wash tank is pumped to the main wash pipe by a pump.

  The washing water pumped to the main washing pipe flows down from the water outlet above the conveyor to which the tableware is transferred, and the washed-down washing water is used for the tableware washing process and flows into the main washing tank again. The finishing cleaning water that has flowed into the cleaning tank is used again as cleaning water. The main cleaning tank overflows when the cleaning water exceeds the allowable amount, and does not exceed the allowable amount.

  In this way, the purified water supplied from the finishing nozzle located on the most downstream side in the traveling direction of the conveyor is first used in the finishing washing section with relatively little tableware contamination. Then, after being used in the finishing cleaning section, the finishing cleaning water which is not very dirty is used in the main cleaning section where the dishes are relatively dirty. In this way, the wash water is made to flow so as to use wash water with relatively little dirt for washing dishes with little dirt and to use wash water with relatively dirt for washing dishes with much dirt. Thus, it is possible to efficiently use the purified water supplied after the operation of the dishwasher.

  (Effect of Embodiment 1) In the dishwashing apparatus of the present invention having the above-described configuration, a large amount of washing water flow is allowed to act on the tableware, so that tableware is immersed in the immersion tank without providing an immersion tank. The same effect as the case can be obtained. For this reason, since a complicated structure is not required compared with the tableware washing apparatus at the time of providing an immersion tank, an apparatus can be reduced in size. In addition, the tableware basket transported by the conveyor of the tableware washing apparatus can store and store the tableware to be stored, if there is some margin, and ensure that each tableware that is stacked is stored one by one. Therefore, working efficiency can be greatly improved by using this tableware washing apparatus. Furthermore, since a large amount of washing water is poured into the gap between the tableware and the tableware, the stacked tableware can be cleaned regardless of the size and shape of the tableware.

Schematic diagram of dishwasher Cross section of waterfall Perspective view of water outlet Front view and side view of waterfall The figure explaining a state that tableware is washed according to transfer of a tableware basket Diagram explaining the action of the waterfall The figure explaining how tableware rotates by the waterfall The figure which shows the specific example of the tableware washing device Figure showing a specific example of a tableware basket

0101 Conveyor 0102, 0201, 0301, 0401 Water outlet 0103 Injection nozzle 0104 Tableware basket 0105 Tableware 0106 Washing water tank 0107 Pump 0202, 0302, 0402 Water supply pipe 0203, 0403 Baffle plate
0204, 0303, 0404 adjustment plate
0205 outlet 0302a, 0402a inlet 0406 projections 0902 guide pipe

Claims (7)

A conveyor for transporting a tableware basket in which a plurality of tableware are stacked and stored in a state in which the opening surface of the tableware in the tableware basket is directed in the traveling direction;
It has a longitudinal direction in the width direction of this conveyor and is formed in a slit shape that opens downward, and includes a water outlet that jets wash water from above the conveyor toward the tableware in the tableware basket,
The tableware basket
The tableware is arranged along the stacking direction of the tableware, and a plurality of the tableware in a state of being stacked such that the opening surface of one tableware adjacent to each other leans against the surface opposite to the opening surface side of the other tableware. It has a plurality of guide pipes that support the outer edge located below the center of gravity,
The water outlet is
A plurality of dishes are stacked with some margin so that the opening surface is substantially perpendicular to the conveyor surface, and the tableware stored in a state in which tableware movement is allowed is overlapped according to the transfer of the tableware basket. Add a moment in the opening direction, which is a moment in the reverse rotation direction that is greater than the gravitational moment applied to the tableware at least in the stowed state with other adjacent tableware, and move the tableware to rotate so that there is a gap. A dishwashing apparatus that forms a large amount of washing water flow that fills the gap from above the conveyor so that the residue remaining on the tableware can be washed away from the tableware by creating a strong water flow in the gap. There,
A water supply pipe having the water outlet, formed in a rectangular prismatic shape, and whose axis is oriented in a direction crossing the conveyor;
Provided in the water pipe so that a gap is formed between the water pipe and a baffle plate having a U-shaped cross section opening upward,
The water pipe is
An inflow port located above the baffle plate for allowing cleaning water to flow into the water pipe;
Located below the baffle plate, and having an outlet for allowing washing water to flow into the water outlet,
Wash water that has flowed into the water supply pipe from the inlet is once received by the baffle plate, then overflows from the baffle plate, and flows down from the water outlet through the gap and the outlet. dishwashing apparatus which is characterized in that it it. The length of the longitudinal direction of a slit-shaped waterfall is substantially the same as the conveyor width | variety of a conveyor. The tableware washing apparatus of Claim 1 characterized by the above-mentioned. The dish washing apparatus according to claim 1 or 2, wherein the amount of water for washing flowing down from the water outlet is about 0.6 liter / minute · millimeter or more. The dish washing apparatus according to any one of claims 1 to 3, further comprising: an injection nozzle that injects cleaning water from below the conveyor in a direction opposite to the moving direction of the conveyor. The tableware washing device according to any one of claims 1 to 4, wherein the waterfall width of the waterfall is adjustable. The water outlet is formed by an adjusting plate that adjusts the width of the water outlet.
The tableware washing apparatus according to claim 5. 7. A dishwasher according to any one of claims 1 to 6, wherein a protrusion is provided at a lower portion of the baffle plate to form a gap between the lower portion of the baffle plate and the water supply pipe. apparatus.

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