JP2024035254A - Dish washing inspection device and dish washing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dish washing inspection device and a dish washing system capable of speedily and reliably inspecting a soil and the like for both of the surfaces of a washed dish and easily inspecting the soil etc. of the washed dish, by a simple constitution.

SOLUTION: The dish washing inspection device comprises: a first imaging unit which images from above the whole area of one surface of a washed dish; a first inverter which vertically inverts the imaged dish; a second imaging unit which images from above the whole area of the other surface of the inverted dish; and a discrimination mechanism which discriminates a result of washing from images taken by the first imaging unit and the second imaging unit is satisfactory or not.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a washing inspection device for washed tableware and a dishwashing system equipped with this washing inspection device.

Patent Document 1 discloses that a post-inspection device is provided between a tableware drying section and a packaging section, and a CCD camera photographs the tableware conveyed from the drying section and stored obliquely in a tableware storage body. Disclosed is a dishwashing system that analyzes image data and automatically inspects each facility for damage and dirt on the dishes based on the analysis results and facility identification information.

Since the tableware is housed diagonally within the tableware housing, if these tableware are photographed with a CCD camera provided above the tableware housing, the entire surface of the tableware cannot be photographed. Therefore, in the dishwashing system described in Patent Document 1, a plurality of CCD cameras are attached to the tips of a plurality of thin rod-like bodies, and these rod-like bodies are moved to place the CCD cameras in the gap between the tableware container and the tableware. By inserting the image, the entire surface of the tableware is photographed.

Japanese Patent Application Publication No. 2015-221096

According to the dishwashing system described in Patent Document 1, not only a plurality of CCD cameras and thin rod-shaped bodies are required, but also it is necessary to move these and insert them into the gap between the dish container and the dishes. As a result, the device configuration and operation become extremely complicated, making inspection processing difficult, and furthermore, inspection cannot be performed reliably in a short period of time. Furthermore, with this dishwashing system, it was not possible to inspect both the front and back sides of the dishes for dirt.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a dishwashing inspection device and a dishwashing system that can quickly and reliably test both sides of washed dishes for dirt and the like.

Another object of the present invention is to provide a dishwashing inspection device and a dishwashing system that can easily inspect dirt, etc. on dishes after washing with a simple configuration.

According to the present invention, the tableware cleaning inspection device includes: a first imager that images the entire surface of one side of the washed tableware from above; a first inverter that turns the imaged tableware upside down; a second imager that images the entire surface of the other side of the inverted tableware from above; and a determination mechanism that determines whether the washing result of the tableware is good or bad from the images taken by the first imager and the second imager. It is equipped with

An image is taken of the entire surface of one side of the tableware after washing, and after the tableware is turned upside down, an image of the entire surface of the other side is taken, and the quality of the cleaning result of the tableware is determined from these images. The entire surface of one side of the tableware is imaged with one imager, and after the tableware is turned upside down, the entire surface of the other side is imaged with one imager at once to determine the cleaning result. It is possible to quickly and reliably inspect the dishes for stains, etc. afterward. Furthermore, since the tableware is inverted and images are taken of both sides, inspection can be easily performed with a simple configuration.

Note that in this specification, "tableware" refers to, for example, bowls (rice bowls, soup bowls), side plates (large plates, small plates), cups, trays, etc. used for school lunches. Bento boxes are also included in "tableware."

Preferably, the apparatus further includes a second inverter that inverts the tableware imaged by the second imager up and down.

It is also preferable to further include a tableware discharging mechanism for discharging the tableware midway when the determination mechanism determines that the cleaning result of the tableware is negative.

It is also preferable that the tableware ejection mechanism includes a dropping mechanism that drops the tableware that has been determined to have a negative cleaning result, and a discharge conveyor that discharges the tableware that has been dropped by the dropping mechanism to the outside.

In this case, it is more preferable that the second inverter includes a dropping mechanism.

A conveyor is connected to a second inverter, and if a determination mechanism determines that the cleaning result of the tableware is good, the conveyor conveys the tableware without ejecting it halfway, and the tableware conveyed by the conveyor is stacked one after another. It is also preferable to further include a tableware arrangement mechanism for organizing tableware.

The first inverter includes a gripping part that grips the tableware transported after being imaged by the first imager, a first rotation part that rotates the gripping part and inverts it up and down, and a first rotation It is also preferable that the gripping portion releases the tableware after the tableware is turned over by the holding portion.

In this case, the first inverter includes a tableware accommodating part that can accommodate the transported tableware from one end in the longitudinal direction and is rotatable about the center in the longitudinal direction, and one end of the tableware accommodating part. It is more preferable that the opening/closing door is configured to open when the tableware accommodating section rotates 180 degrees.

The second inverter includes a gripping part that slidably grips the tableware transported after being imaged by the second imager, a second rotating part that rotates the gripping part and inverts it up and down, After the tableware is reversed by the rotating part 2, the gripping part releases the tableware, and furthermore, if the determination mechanism determines that the washing result of the tableware is negative, the tableware is removed during the rotation. It is also preferable that the grip is released.

In this case, the second inverter includes a tableware accommodating part that can accommodate the transported tableware from one end in the longitudinal direction and is rotatable about the center in the longitudinal direction, and one end of the tableware accommodating part. It is equipped with an opening/closing door that can be opened and closed, and the opening/closing door opens when the tableware accommodating section is rotated 180 degrees, and when the washing result of the tableware is determined to be negative and the tableware accommodating section is rotated 90 degrees. More preferably, it is configured to open.

A first imager, a first inverter, a second imager, and a second inverter are provided on each of a plurality of conveyance lines that convey tableware in parallel, and a plurality of The first reversing devices are configured to perform reversing operations in conjunction with each other, and the plurality of second reversing devices in the plurality of conveyance lines are configured to perform reversing operations and discharge operations in conjunction with each other. It is also preferable to be there.

According to the present invention, the dishwashing system further includes a dishwasher for washing dishes, and the above-mentioned dishwashing inspection device connected downstream of the dishwasher.

According to the present invention, the entire surface of one side of the tableware is imaged at once with one imager, and after the tableware is turned upside down, the entire surface of the other side is imaged at once with one imager to determine the cleaning result. This makes it possible to quickly and reliably inspect dishes for dirt after washing. Furthermore, since the tableware is inverted and images are taken of both sides, inspection can be easily performed with a simple configuration.

1 is a side view schematically showing a partial configuration example of a dishwashing system as an embodiment of the present invention. FIG. 2 is a perspective view schematically showing a configuration example of a part of a dishwasher and a dish sorting section in the dishwashing system of FIG. 1. FIG. 2 is a plan view schematically showing a configuration example of a washing inspection device, a height adjustment conveyor, and a tableware stacking section in the tableware washing system of FIG. 1. FIG. FIG. 2 is a perspective view schematically showing a configuration example of a tableware ejection mechanism in the washing inspection device of the tableware washing system shown in FIG. 1. FIG. FIG. 2 is a diagram schematically showing a configuration example of a tableware sorting mechanism in the tableware washing system of FIG. 1 from the terminal end side. FIG. 2 is a side view schematically showing the configuration and operation of each tableware stacking section of the tableware sorting mechanism in the tableware washing system of FIG. 1. FIG. FIG. 2 is a side view (A) and a front view (B) schematically showing a configuration example of a mechanism for reversing dishes of the washing inspection device in the dishwashing system of FIG. 1. FIG. FIG. 2 is a side view illustrating the operation of the first inverter in the washing inspection device of the dishwashing system shown in FIG. 1. FIG. FIG. 2 is a side view illustrating the operation of the second inverter in the washing inspection device of the dishwashing system shown in FIG. 1; 2 is a flowchart illustrating an example of the flow of the determination operation of the control device in the cleaning inspection device of the dishwashing system of FIG. 1. FIG. FIG. 2 is a side view schematically showing a partial configuration example of a dishwashing system as another embodiment of the present invention. FIG. 12 is a plan view schematically showing a partial configuration example of the dishwashing system of FIG. 11. FIG.

FIG. 1 schematically shows a configuration example of a part of a dishwashing system as an embodiment of the present invention, and FIG. A configuration example is schematically shown, and FIG. 3 schematically shows a configuration example of a cleaning inspection device, a height adjustment conveyor, and a tableware stacking section in the dishwashing system of this embodiment. The tableware washing system of this embodiment is a system that cleans tableware and trays used for school lunches, for example, and inspects the cleaning results.

In these figures, 10 indicates a dishwasher, in which washed and dried dishes 11, 11', and 11'' are arranged in multiple rows (four rows in this embodiment, but the number of rows is not limited to this). ) is conveyed with one side (in this embodiment, the back side) facing upward by the washer conveyor 12.The tableware sorting section 13 is connected to the tableware washer 10, and the tableware cleaning section 13 is The dishes 11, 11' and 11'' conveyed by the four rows of washer transport conveyors 12 of the machine 10 are transported by the four rows of sorting section transport conveyors 14 of the tableware sorting section 13 at a speed faster than the transport speed of the dishwasher 10. Each is transported. The conveyance speed of the sorting section conveyor 14 is set faster than the conveying speed of the washer conveyor 12, thereby making it possible to widen the distance between the conveyed dishes 11, 11' and 11''.Dish sorting section 13 is provided with a height gate 15, which detects the height of the tableware 11, 11' and 11'' conveyed by the sorting section conveyor 14, and separates two of the tableware 11, 11' and 11''. If more than one overlap is detected, the dishwashing system is configured to stop operating.

A cleaning inspection device 16 is connected to the tableware sorting section 13, and a tableware sorting mechanism 18 is connected to this cleaning inspection device 16 via a height adjustment conveyor 17.

As shown in FIGS. 1 and 3, the cleaning inspection device 16 receives and conveys the tableware 11, 11', and 11'' conveyed by the four-row sorting section transport conveyor 14 of the tableware sorting section 13. One surface (in this embodiment, the back surface) of the tableware 11, 11', and 11'' located in the center of the first inspection device conveyor 19 and these four rows of first inspection device conveyor 19 and conveyed. Four first imagers 20 each image the entire surface from above at once, and tableware 11, 11 imaged by the four first imagers 20 and transported by four rows of first inspection device transport conveyors 19 four rows of first inverters 21 that receive and invert the dishes 11, 11' and 11'' vertically; The other surface (in this embodiment, the front surface) of the tableware 11, 11' and 11'' which are located in the center of the second inspection device conveyor 22 and these four rows of second inspection device conveyor 22 and are conveyed. Four second imagers 23 each image the entire surface from above at once, and tableware 11, 11 imaged by the four second imagers 23 and transported by four rows of second inspection device transport conveyors 22 four second inverters 24 that receive and invert the dishes 11, 11' and 11'' vertically, and discharge the dishes 11, 11' and 11'' midway without inverting them if the cleaning result is determined to be negative. Note that the four first inverters 21 are connected to a common rotation shaft 21a and are configured to rotate in conjunction with each other.Furthermore, the four second inverters 24 are also connected to a common rotation shaft 21a. It is connected to the rotation shaft 24a of the rotary shaft 24a and is configured to rotate in conjunction with the rotation shaft 24a.

The first imager 20 is, for example, a CCD camera, which captures an image from above of the tableware conveyed by the first inspection device conveyor 19 and obtains a still image of the entire back side of the tableware. The imager 23 is, for example, a CCD camera, which takes an image of the tableware conveyed by the second inspection device conveyor 22 from above at once and obtains a still image of the entire surface of the tableware. When a position detection sensor (not shown) detects that the tableware has been transported in front of the CCD camera, the CCD camera captures a still image, and the captured data is transmitted to the control device 26. Although not shown, it is desirable to provide lighting equipment for illuminating the tableware in order to assist the imaging by the CCD camera. A CMOS camera or other cameras may be used as the first imager 20 and the second imager 23. Note that depending on the shape of the tableware, a plurality of first imagers 20 and a plurality of second imagers 23 may be provided in each row to image the tableware not only from above but also from the side. good.

The cleaning inspection device 16 further includes a tableware discharge mechanism 25 that discharges the tableware 11, 11', and 11'' discharged from the four second inverters 24, and four first imagers 21 and four first imagers 21. A control device 26 equipped with a computer that controls a determination operation (corresponding to the determination operation of the determination mechanism of the present invention) for determining whether the washing results of the dishes are good or bad from the data of the image captured by the imager 23 of No. 2 is provided. Although not shown in the drawings, the control device 26 is provided with a touch panel, an image monitor, etc. for inputting by touch operation, in addition to the above-mentioned computer.

FIG. 4 schematically shows a configuration example of the tableware ejection mechanism 25 in the cleaning inspection device 16 of the tableware washing system of this embodiment.

As shown in FIGS. 1 and 4, the dish ejection mechanism 25 is provided below the four second inverters 24, and the tableware ejection mechanism 25 is provided below the four second inverters 24. ) is provided with a discharge conveyor 27 for discharging the tableware 11 dropped to the outside, and a discharge tableware accommodating section 28 for storing the tableware 11 conveyed by the discharge conveyor 27. Note that the four second inverters 24 are configured to rotate in conjunction with each other as described above, so that the washing results of the dishes on the inspection device transport conveyor in only one row are determined to be negative. Even if the inspection device is transported in four rows, all the dishes on the inspection device transport conveyor are discharged. As a modification of this embodiment, the tableware discharge mechanism may be configured to discharge only the tableware in that row when the washing result of the tableware on the inspection device transport conveyor is determined to be negative. In this embodiment, the tableware 11 conveyed by the discharge conveyor 27 is stored in the discharged tableware accommodating section 28, but as a modification of this embodiment, the discharged tableware 11 is washed. It may be configured such that the dishes are transported to the entrance of the machine 10 and the dishes are washed again.

The four second inverters 24 in the cleaning inspection device 16 are connected to four rows of height adjustment conveyors 17. The dishes 11, 11', and 11'' whose cleaning results are determined to be good are turned upside down by the four second inverters 24 and sent to the four rows of height adjustment conveyors 17 with their backs facing up. These four rows of height adjustment conveyors 17 are provided to raise the dishes from the four second inverters 24 to the height of the dish arrangement mechanism 18.

FIG. 5 schematically shows a configuration example of the tableware sorting mechanism 18 in the tableware cleaning system of this embodiment from the end side, and FIG. 6 schematically shows the configuration and operation of each tableware stacking section 29 of the tableware sorting mechanism 18. It shows.

As shown in these figures, the tableware arrangement mechanism 18 is provided with four tableware stacking sections 29. Each tableware stacking section 29 includes a stopper 30 that locks the tableware 11' received from the height adjustment conveyor 17 in a stacked state, and a push-up section 31 that pushes up the tableware 11' to the position of the stopper 30. The tableware 11' received from the adjustment conveyor 17 is sequentially stacked from the bottom.

Next, the tableware reversing operation and tableware dropping operation by the first reversing device 21 and the second reversing device 24 will be explained.

FIG. 7 schematically shows a configuration example of a mechanism for reversing dishes in the cleaning inspection device 16 of the dishwashing system of this embodiment, and FIG. FIG. 9 explains the operation of the second inverter 24 in the cleaning inspection device 16 of the dishwashing system of this embodiment.

As shown in FIG. 7, the mechanism for inverting tableware in the first inverter 21 and the second inverter 24 includes a tableware accommodating section 32 that can accommodate the tableware 11 from an opening at one end in the longitudinal direction; It includes an opening/closing door 33 that can open and close an opening at one end of the storage section 32, and an opening/closing door 34 that can open and close the opening (the center portion) at the other end of the tableware storage section 32. The tableware accommodating portion 32 is configured to be rotatable around a central axis 32a in its longitudinal direction. The opening/closing door 33 is for closing the opening at one end of the tableware accommodating section 32 (the center thereof) so that the tableware 11 inside the tableware accommodating section 32 is not released to the outside. The opening/closing door 33 can be rotated about a shaft 33a to open the opening and release the tableware 11 inside to the outside. The opening/closing door 34 is for closing the opening at the other end of the tableware accommodating section 32 (the center thereof) so that the tableware 11 inside the tableware accommodating section 32 is not released to the outside. By rotating the door 34 about a shaft 34a, it is possible to open the opening and release the tableware 11 inside to the outside.

Next, the tableware reversing operation by the first reversing device 21 will be explained. Initially, the first inverter 21 keeps the opening/closing door 33 open. In this state, as shown in FIG. 8(A), the tableware 11 conveyed by the first inspection device conveyor 19 slides from the opening at one end in the longitudinal direction and is stored inside the tableware storage section 32. Ru. At this point, the tableware 11 is in a state where the back side is facing upward.

Next, as shown in FIG. 8(B), the opening/closing door 33 rotates around the shaft 33a to close the opening (the center portion thereof), and in this state, the opening/closing door 33 rotates around the shaft 33a, and in this state, the opening/closing door 33 rotates at 0 degrees as shown in FIG. 8(C). The tableware accommodating portion 32 rotates about the shaft 32a from the rotation state to the 90 degree rotation state shown in FIG. 8(D), and further to the 180 degree rotation state shown in FIG. 8(E). do. As a result, the tableware 11 inside the tableware accommodating portion 32 is not released to the outside, but is turned upside down, with the surface facing upward.

After the tableware accommodating portion 32 has rotated from the 0 degree rotation state in FIG. 8(C) to the 180 degree rotation state in FIG. 8(E), the opening/closing door 33 is opened as shown in FIG. 8(F). The opening is opened by rotating about the shaft 33a. As a result, as shown in FIG. 8(G), the tableware 11 is discharged from the tableware accommodating section 32 to the outside and is received by the second inspection device transport conveyor 22.

Next, as shown in FIG. 8(H), the opening/closing door 33 (the center portion thereof) is closed. Thereafter, the opening/closing door 34 is opened, resulting in a state similar to that in FIG. 8(A).

Next, the tableware reversing operation and tableware ejecting operation by the second reversing device 24 will be explained. Initially, the second inverter 24 keeps the opening/closing door 33 open. In this state, as shown in FIG. 9(A), the tableware 11 conveyed by the second inspection device conveyor 22 slides from the opening at one end in the longitudinal direction and is stored inside the tableware storage section 32. Ru. At this point, the tableware 11 is in a state with its surface facing upward.

Next, as shown in FIG. 9(B), the opening/closing door 33 rotates around the shaft 33a to close the opening (the center portion thereof), and in this state, the opening/closing door 33 rotates around the shaft 33a, and in this state, the opening/closing door 33 rotates at 0 degrees as shown in FIG. 9(C). If the washing result is determined to be good, the tableware accommodating section changes from the rotating state to the 90 degree rotating state shown in FIG. 32 rotates around a shaft 32a. As a result, the tableware 11 inside the tableware accommodating portion 32 is not released to the outside, but is turned upside down, with the back surface facing upward.

After the tableware accommodating section 32 has rotated from the 0 degree rotation state in FIG. 9(C) to the 180 degree rotation state in FIG. 9(E), the opening/closing door 33 is opened as shown in FIG. 9(F). The opening is opened by rotating about the shaft 33a. As a result, as shown in FIG. 9(G), the tableware 11 is ejected from the tableware accommodating section 32 to the outside and is received by the height adjustment conveyor 17.

Next, as shown in FIG. 9(H), the opening/closing door 33 (the central portion thereof) is closed. Thereafter, the opening/closing door 34 is opened, resulting in a state similar to that shown in FIG. 9(A).

On the other hand, if the cleaning result is determined to be negative, the opening/closing door 33 rotates about the shaft 33a as shown in FIG. 9(I) from the 90 degree rotation state shown in FIG. 9(D). As a result, the opening is opened, and the tableware 11 inside the tableware storage section 32 is dropped onto the discharge conveyor 27 of the tableware discharge mechanism 25 and discharged to the outside. This part of the second inverter 24 corresponds to the dropping mechanism of the present invention.

There are various methods for determining whether the cleaning results of the tableware 11 are good or bad based on still image data of the back and front surfaces of the tableware 11 captured by the first imager 20 and the second imager 23. For example, one method is to determine that there is dirt and the cleaning result is negative if the variation in pixel data of the light intensity over the entire back or front surface is greater than a predetermined threshold, and if it is less than a predetermined threshold, There is a method of determining that the cleaning result is good based on the absence of dirt.

FIG. 10 explains the flow of an example of the determination operation of the control device 26 in the cleaning inspection device 16 of the dishwashing system of this embodiment.

In this method, as shown in FIG. 10, first, pixel data of the light intensity of the entire back surface of the tableware 11, which is imaged by the first imager 21 and stored in the database of the control device 26, is read out. A standard deviation (or variance) representing variation is calculated (step S1).

Similarly, the pixel data of the light intensity of the entire surface of the tableware 11 captured by the second imager 23 and stored in the database of the control device 26 is read out, and the standard deviation (or variance) representing the variation is calculated. (Step S2).

Next, it is determined whether the calculated standard deviation of the pixel data on the back side is less than a first threshold (step S3), and if it is determined that it is less than the first threshold (in the case of YES), the process proceeds to step S4. Then, it is determined whether the calculated standard deviation of the surface pixel data is less than a second threshold. If it is determined in step S4 that it is less than the second threshold (in the case of YES), it is determined that the tableware 11 is free of dirt and that the cleaning result is good (step S5).

If it is determined in step S3 that the standard deviation is greater than or equal to the first threshold (in the case of NO), or if it is determined in step S4 that the standard deviation is greater than or equal to the second threshold (in the case of NO), this tableware 11 It is determined that there is dirt and the cleaning result is negative (step S6).

As another example of the determination operation of the control device 26 in the cleaning inspection device 16 of the dishwashing system of this embodiment, there is a method of determining the quality of the dishwashing results using AI.

This method acquires a machine learning model by performing deep learning in advance on the image data of the back and front sides of a very large number of clean dishes and the image data of the back and front sides of a very large number of dirty dishes. I'll keep it. A solution is obtained by applying the image data of the back side of the tableware actually imaged by the first imager and the image data of the front side of the tableware actually imaged by the second imager to this acquired learning model. , to detect whether the washing results of the tableware are good or bad.

As described in detail above, according to the present embodiment, one first image pickup device 20 images the entire surface of one side (for example, the back side) of the washed dishes 11, 11', and 11'' at once. , the tableware 11, 11', and 11'' are inverted vertically by the first inverter 21, and then the entire surface of the other side (for example, the front surface) is imaged at once by one second imager 23. The quality of the washing results of the dishes 11, 11' and 11'' is determined from the captured images of the entire back surface and the entire front surface.In this way, the entire back surface of the dishes 11, 11' and 11" is Since the washing results are determined by taking images with two imagers at once, and then inverting the dishes vertically, the entire surface is taken with one imager at once, so the washing results can be determined. Inspections for dirt, etc. can be carried out quickly and reliably. Also, since the dishes 11, 11' and 11'' are inverted and images are taken of both sides, inspections can be carried out easily with a simple configuration. . Note that depending on the shape of the tableware, a plurality of first imagers 20 and a plurality of second imagers 23 may be provided in each row to image the tableware not only from above but also from the side. good.

FIG. 11 schematically shows a partial configuration example of a dishwashing system as another embodiment of the present invention, and FIG. 12 schematically shows a partial configuration example of a dishwashing system according to the present embodiment. ing.

This embodiment differs only in the configurations of the tableware discharging mechanism and height adjustment conveyor from the configurations of the tableware discharging mechanism 25 and height adjustment conveyor 17 in the embodiments of FIGS. 1 to 10, and other configurations and operations. is the same as in the embodiments of FIGS. 1 to 10. Therefore, the same reference numerals will be used for the same components and the explanation will be omitted.

As shown in FIGS. 11 and 12, in this embodiment, second inverters 44a, 44b, 44c and 44d, and discharges the dropped dishes 11 to the outside by the dropping mechanisms provided in these four second inverters 44a, 44b, 44c, and 44d, and these discharge conveyors. Tableware ejection mechanisms 45a, 45b, 45c and 45d are provided, each of which includes four ejection tableware accommodating portions that accommodate the transported tableware 11. Since the four tableware ejection mechanisms 45a, 45b, 45c, and 45d are provided separately for each row, if the same type of tableware is washed in each row, each tableware ejection mechanism can handle multiple types of tableware. Dishes are not mixed together. Note that the four second inverters 44a, 44b, 44c, and 44d are configured to rotate in conjunction with each other, so that the cleaning results of the dishes on the inspection device transport conveyor in only one row may be rejected. The configuration may be such that all the dishes on the four rows of inspection device conveyors are discharged even if the cleaning result of the dishes on the inspection device conveyor is determined to be negative. It may also be configured to eject dishes only from that row. Further, in this embodiment as well, the discharged dishes 11 may be transported to the entrance of the dishwasher 10 and the dishes washed again.

In this embodiment, the four second inverters 44a, 44b, 44c and 44d are connected to four rows of height adjustment conveyors 47a, 47b, 47c and 47d. The tableware 11 that has been determined to have a good cleaning result is turned upside down by four second inverters 44a, 44b, 44c, and 44d, and is conveyed to four rows of height adjustment conveyors 47a, 47b, 47c with the back side facing up. and 47d, respectively. These four rows of height adjustment conveyors 47a, 47b, 47c and 47d are provided to raise the dishes from the four second inverters 44a, 44b, 44c and 44d to the height of the dish arrangement mechanism 18. .

As described in detail above, according to the present embodiment, one first imager 20 images the entire surface of one side (for example, the back side) of the washed tableware 11 at a time, and the tableware 11 is After being flipped vertically by one inverter 21, the entire surface of the other surface (for example, the front surface) is imaged at once by one second imager 23, and the captured images of the entire surface of the back surface and the entire surface of the front surface are captured. The quality of the washing result of the tableware 11 is determined based on this. In this way, the entire back surface of the tableware 11 is imaged at once with one imager, and after the dish is turned upside down, the entire surface is imaged with one imager at once to determine the cleaning result. Inspection of dirt, etc. on tableware 11 after washing can be performed reliably in a short time. Moreover, since the tableware 11 is inverted and images are taken of both sides, inspection can be easily performed with a simple configuration. Note that depending on the shape of the tableware, a plurality of first imagers 20 and a plurality of second imagers 23 may be provided in each row to image the tableware not only from above but also from the side. good. Further, according to the present embodiment, the four rows of conveyors are each provided with separate tableware discharge mechanisms 45a, 45b, 45c, and 45d, so that the same type of tableware is washed in each row. This prevents a plurality of types of tableware from being mixedly discharged from each tableware discharge mechanism.

All of the embodiments described above are illustrative of the present invention and are not intended to limit the present invention, and the present invention can be implemented in various other modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

10 Dishwasher 11, 11', 11'' Tableware 12 Washing machine conveyor 13 Dish sorting section 14 Sorting section conveyor 15 Height gate 16 Washing inspection device 17, 47a, 47b, 47c, 47d Height adjustment conveyor 18 Dish sorting Mechanism 19 First inspection device conveyor 20 First imager 21 First inverter 21a, 24a Rotating shaft 22 Second inspection device conveyor 23 Second imager 24, 44a, 44b, 44c, 44d Second inverter 25, 45a, 45b, 45c, 45d Tableware discharge mechanism 26 Control device 27 Discharge conveyor 28 Discharged tableware storage section 29 Tableware stacking section 30 Stopper 31 Push-up section 32 Tableware storage section 32a, 33a, 34a Axis 33, 34 opening/closing door

Claims (12)

a first imager that images the entire surface of one side of the washed tableware from above; a first inverter that inverts the imaged tableware vertically; and a first imager that images the entire surface of the other side of the inverted tableware from above. and a determination mechanism that determines whether the cleaning result of the tableware is good or bad based on the images taken by the first image pickup device and the second image pickup device. A washing inspection device for tableware. The dishwashing inspection device according to claim 1, further comprising a second inverter that inverts the dish imaged by the second imager up and down. 3. The tableware cleaning inspection apparatus according to claim 2, further comprising a tableware discharge mechanism that discharges the tableware midway when the determination mechanism determines that the cleaning result of the tableware is negative. According to claim 3, the tableware discharging mechanism includes a dropping mechanism that drops the tableware that has been determined to have a negative cleaning result, and a discharge conveyor that discharges the tableware that has been dropped by the dropping mechanism to the outside. The dishwashing inspection device described above. The dishwashing inspection device according to claim 4, wherein the second inverter includes the dropping mechanism. a conveyor which is connected to the second inverter and conveys the tableware without ejecting it midway if the determination mechanism determines that the cleaning result of the tableware is good; 3. The tableware cleaning and inspection apparatus according to claim 2, further comprising a tableware arrangement mechanism that sequentially stacks and organizes the tableware. The first inverter includes a grip part that grips the tableware transported after being imaged by the first imager, a first rotation part that rotates the grip part and inverts it vertically, and 2. The tableware cleaning and inspection apparatus according to claim 1, wherein the tableware is released from being gripped by the gripping section after the tableware is reversed by the first rotating section. A tableware accommodating part in which the first inverter is capable of accommodating transported tableware from one end in the longitudinal direction and rotatable about the center in the longitudinal direction; and the one end of the tableware accommodating part. The tableware according to claim 7, further comprising a door that can be opened and closed, and the door is configured to open when the tableware accommodating section rotates 180 degrees. Cleaning inspection equipment. The second inverter includes a gripping part that slidably grips the tableware conveyed after being imaged by the second imager, and a second rotation part that rotates the gripping part and inverts it up and down. and the tableware is configured to be released from the gripping portion of the tableware after being reversed by the second rotating portion, and further, when the determination mechanism determines that the cleaning result of the tableware is negative; 3. The tableware cleaning and inspection apparatus according to claim 2, wherein the apparatus is configured to release the grip on the tableware during rotation. A tableware accommodating part in which the second inverter is capable of accommodating transported tableware from one end in the longitudinal direction and rotatable about the center in the longitudinal direction; and the one end of the tableware accommodating part. The opening/closing door is provided with an opening/closing door that can be opened and closed, and the opening/closing door is configured to operate when the tableware accommodating section is rotated 180 degrees and when the washing result of the tableware is determined to be negative and the tableware accommodating section is rotated 90 degrees. 10. The dishwashing inspection device according to claim 9, wherein the device is configured to open when the device is opened. The first imager, the first inverter, the second imager, and the second inverter are provided in each of the plurality of conveyance lines that convey tableware in parallel, and the plurality of The plurality of first inverters in the conveyance line are configured to perform a reversal operation in conjunction with each other, and the plurality of second inverters in the plurality of conveyance lines are configured to perform a reversal operation and discharge in conjunction with each other. The dishwashing inspection device according to claim 2, wherein the device is configured to perform the operation. A dishwasher comprising: a dishwasher for washing dishes; and the dishwashing inspection device according to any one of claims 1 to 11, which is connected downstream of the dishwasher. system.

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