JP6902667B1 - Date information reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically read date information written on a reading object without performing reading work by an operator's handy terminal. An approach detection unit that detects that an object to be read has entered an imaging area provided in a transport path of a transport unit that transports the object to be read, and an imaging unit that images the imaging area and creates imaging data. And a date information acquisition unit that extracts the date information written on the read object from the imaging data including the read object obtained based on the detection result of the approach detection unit. [Selection diagram] Fig. 1

Description

The present invention relates to a date information reader.

Many processed foods and the like are transported in a large number of packed boxes in the distribution process. The articles contained in a single packaging box are generally the same type of articles manufactured in the same lot. For this reason, information that can identify the stored items at the store is written on the packing box. For example, on the packaging box for storing food, date information such as expiration date and expiration date is written as the above information.

For example, when managing the expiration date and the expiration date of a product at the delivery destination of the product, the handy terminal reads the date information written on the packing box. For example, Patent Document 1 discloses an expiration date checking device that manages an expiration date read by a handy terminal.

Japanese Unexamined Patent Publication No. 2007-317043

However, when reading the date information by the handy terminal, the worker searches for the position where the date information is written in each packing box, and brings the handy terminal closer to the found date information to read the date information. Work needs to be done. A huge amount of goods are delivered to retail stores every day. For this reason, performing the work of reading the date information by the handy terminal for each of the packing boxes imposes a heavy work load on the worker and lowers the efficiency of the delivery work of the goods.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make it possible to automatically read the date information written on the object to be read without performing the reading work by the operator's handy terminal. ..

The present invention employs the following configuration as a means for solving the above problems.

The first invention is a date information reading device, which includes an approach detecting unit for detecting that the reading object has entered the imaging area provided in the transport path of the transport unit for transporting the reading object, and the imaging. The date information indicated on the reading object is extracted from the imaging data including the reading object obtained based on the detection result of the approach detection unit and the imaging unit that captures the area and creates the imaging data. A configuration is adopted in which a date information acquisition unit is provided.

The second invention employs, in the first invention, a configuration including a downstream position sensor that detects the presence or absence of the reading target object at a downstream position of the imaging area in the transport path.

In the second invention, the third invention includes an imaging control unit that causes the imaging unit to image the object to be read based on the detection result of the approach detecting unit, and the imaging control unit is the approach detecting unit. After the entry of the reading object into the imaging area is detected, if the reading object is detected by the downstream position sensor, the imaging unit stops the imaging.

In the fourth aspect of the invention, in any one of the first to third inventions, the barcode reader arranged at a position upstream of the imaging area in the transport path and the barcode reader in the transport path. A configuration is adopted in which the barcode reader is arranged at an upstream position and is provided with a barcode reader activation sensor that detects the presence or absence of the object to be read and outputs a signal for activating the barcode reader.

In the fifth invention, in any one of the first to fourth inventions, the date information acquisition unit adopts a configuration in which the date information is determined as expiration date information or expiration date information.

In the sixth invention, in any one of the first to fifth inventions, the configuration including the transport unit is adopted.

According to the seventh invention, in the sixth invention, the transport unit includes a transport direction changing unit that changes the transport direction of the object to be read, and the transport direction changing unit is provided with the imaging area. Adopt the configuration.

In the eighth invention, in the seventh invention, a configuration is adopted in which the plurality of imaging units for imaging the reading object in the imaging area from different directions are provided.

In the ninth invention, in any one of the first to eighth inventions, the approach detection unit is arranged at an upstream position of the imaging area in the transport path to detect the presence or absence of the reading object at the arrangement position. It adopts the configuration that it is a sensor.

In the tenth invention, in any one of the first to eighth inventions, the approach detection unit is an area sensor that detects the presence or absence of the reading target object in the imaging area.

According to the present invention, a reading object that has entered the imaging area is imaged, and date information is extracted based on the imaged data. Therefore, it is possible to read the date information written on the object to be read without performing the reading work by the operator's handy terminal.

It is a top view which shows typically the schematic structure of the date information reading apparatus in 1st Embodiment of this invention. It is a timing chart for demonstrating the operation of the date information reading apparatus in 1st Embodiment of this invention. It is a top view which shows typically the schematic structure of the date information reading apparatus in 2nd Embodiment of this invention. It is a timing chart for demonstrating the operation of the date information reading apparatus in 2nd Embodiment of this invention. It is a top view which shows typically the schematic structure of the date information reading apparatus in 3rd Embodiment of this invention. It is a timing chart for demonstrating the operation of the date information reading apparatus in 3rd Embodiment of this invention.

Hereinafter, an embodiment of the date information reading device according to the present invention will be described with reference to the drawings.

(First Embodiment)
FIG. 1 is a plan view schematically showing a schematic configuration of the date information reading device S1 of the first embodiment. The date information reading device S1 of the present embodiment is a device for acquiring and outputting date information indicating the expiration date and the expiration date written on the surface of the packing box X (reading object) containing a large number of the same products. Is. The article for which the date information is to be read is not particularly limited, and is not limited to the packing box X, and may be a packing bag, an article placing tray, or the like.

As shown in FIG. 1, the date information reading device S1 of the present embodiment includes a transport conveyor 1 (transport unit), a first photoelectric sensor 2 (bar code reader activation sensor), and a second photoelectric sensor 3 (entry detection unit). ), The third photoelectric sensor 4 (downstream position sensor), the camera 5 (imaging unit), the barcode reader 6, the reading control processing device 7 (date information acquisition unit, imaging control unit), and the conveyor control processing device. 8 and a general control processing device 9 are provided.

The conveyor 1 is a device that conveys the packing box X. It includes rollers that form a transport path R by arranging a plurality of rollers, a power source that rotationally drives these rollers, and the like. In the present embodiment, the transport conveyor 1 transports the packing box X horizontally and linearly. In the present embodiment, as shown by the arrow in FIG. 1, the transfer conveyor 1 conveys the packing box X from the right side to the left side in FIG. That is, in the present embodiment, in the transport path R, the right side of FIG. 1 is the upstream side, and the left side of FIG. 1 is the downstream side. The conveyor 1 is not limited to the roller conveyor, but may be a belt conveyor.

Further, as shown in FIG. 1, in the present embodiment, a part of the transfer path R of the transfer conveyor 1 is set in the imaging area Ra. This imaging area Ra is along the transport direction rather than the maximum length dimension of the packing box X that can be handled by the date information reader S1 of the present embodiment (the maximum length dimension of the packing box X in the transport direction). The length dimension D1 in the vertical direction is set long. That is, in the present embodiment, the length dimension D1 in the direction along the transport direction of the imaging area Ra is set to a size that can accommodate the entire packing box X of the standard size of the date information reading device S1. ..

The first photoelectric sensor 2, the second photoelectric sensor 3, and the third photoelectric sensor 4 are sensors including a light emitting unit and a receiving unit in the present embodiment. The first photoelectric sensor 2, the second photoelectric sensor 3, and the third photoelectric sensor 4 straddle the transport path R by arranging the light projecting unit and the receiving unit along a direction orthogonal to the transport direction in a plan view. The presence or absence of the packing box X is detected at the arrangement position.

The first photoelectric sensor 2 is arranged on the most upstream side in the transport path R of the first photoelectric sensor 2, the second photoelectric sensor 3, and the third photoelectric sensor 4. In the present embodiment, the second photoelectric sensor 3 is installed so as to be aligned with the position of the most upstream end of the imaging area Ra in the transport direction. The first photoelectric sensor 2 is located further upstream than the second photoelectric sensor 3 in the transport direction. As shown in FIG. 1, the separation distance dimension D2 between the first photoelectric sensor 2 and the second photoelectric sensor 3 in the transport direction is set smaller than the length dimension D1 in the direction along the transport direction of the imaging area Ra. There is.

Such a first photoelectric sensor 2 is arranged at a position upstream of the bar code reader 6 in the transport path R, and is connected to the bar code reader 6. The first photoelectric sensor 2 is also connected to the conveyor control processing device 8. In the present embodiment, the bar code reader 6 is activated when the packing box X is detected by the first photoelectric sensor 2. That is, the first photoelectric sensor 2 detects the presence / absence of the packing box X and outputs a signal for activating the barcode reader 6.

As described above, the second photoelectric sensor 3 is installed so as to be aligned with the position of the most upstream end of the imaging area Ra in the transport direction, and the first photoelectric sensor 2 and the third photoelectric sensor 4 are aligned in the transport direction. It is placed in between. The second photoelectric sensor 3 is a sensor for detecting the entry of the packing box X into the imaging area Ra.

It can be seen that when the second photoelectric sensor 3 is switched from off to on (a state in which the packing box X is not present to a state in which the packing box X is present), the upstream end of the packing box X has entered the imaging area Ra. Further, it can be seen that the downstream end of the packing box X has entered the imaging area Ra by switching the second photoelectric sensor 3 from on to off (the state in which the packing box X is not present). The second photoelectric sensor 3 outputs the detection result to the reading control processing device 7.

The third photoelectric sensor 4 is installed at the position of the most downstream end of the imaging area Ra in the transport direction, and detects the presence or absence of the packaging box X at the downstream position of the imaging area Ra in the transport path. The third photoelectric sensor 4 is a sensor for determining whether or not the packing box X does not protrude from the imaging area Ra. For example, when the packing box X is detected by the second photoelectric sensor 3 and the packing box X is detected by the third photoelectric sensor 4, the packing box X protrudes from the imaging area Ra, which is out of the standard. You can see that it is the size.

The third photoelectric sensor 4 is also used as a sensor for determining whether or not the packing box X has been carried out from the imaging area Ra. For example, when the third photoelectric sensor 4 is switched from off to on (a state in which the packing box X is present), it can be seen that the upstream end of the packing box X has come out of the imaging area Ra. Further, it can be seen that when the third photoelectric sensor 4 is switched from on to off (the state in which the packing box X is present to the state in which the packing box X is not present), the downstream end of the packing box X comes out of the imaging area Ra. The third photoelectric sensor 4 outputs the detection result to the reading control processing device 7 and the conveyor control processing device 8.

The camera 5 is arranged on the side of the conveyor 1 and is supported by a support portion (not shown). The camera 5 is directed to the imaging area Ra of the conveyor 1, and images the imaging area Ra to create imaging data. The camera 5 is connected to the reading control processing device 7, and in the present embodiment, the imaging area Ra is imaged under the control of the reading control processing device 7. The camera 5 may be directly connected to the second photoelectric sensor 3 or the like, and the camera 5 may perform imaging according to the output of the second photoelectric sensor 3 or the like.

Such a camera 5 takes an image of the image pickup area Ra including the packing box X that has entered the image pickup area Ra. In the present embodiment, the camera 5 images the imaging area Ra from a direction orthogonal to the transport direction in the transport path R. Therefore, of the side surfaces of the packing box X, the side surface oriented in the direction orthogonal to the transport direction in a plan view is imaged by the camera 5.

The barcode reader 6 is arranged between the first photoelectric sensor 2 and the second photoelectric sensor 3 in the transfer direction of the transfer conveyor 1. The bar code reader 6 is arranged on the same side as the camera 5 with respect to the conveyor 1.

Such a bar code reader 6 reads the bar code written on the side surface of the packing box X passing in front of the bar code reader 6. The bar code reader 6 is connected to the integrated control processing device 9 via the conveyor control processing device 8, and outputs a reading result to the integrated control processing device 9.

For example, the barcode reader 6 is based on the maximum time that the packaging box X having a size within the standard passes in front of the barcode reader 6 when the detection signal of the packaging box X is input from the first photoelectric sensor 2. It will be in operation for a preset period of time.

As shown in FIG. 1, the reading control processing device 7 is electrically connected to the camera 5, the second photoelectric sensor 3, and the third photoelectric sensor 4. The reading control processing device 7 detects that the packing box X has entered the imaging area Ra from the detection result of the second photoelectric sensor 3, and discharges the packing box X from the imaging area Ra from the detection result of the third photoelectric sensor 4. Detect that it has been done.

When both the second photoelectric sensor 3 and the third photoelectric sensor 4 detect the packing box X at the same time, the reading control processing device 7 determines that the packing box X has a nonstandard size and determines that the packing box X is out of the standard size. The determination result is output to the integrated control processing device 9. Further, when the reading control processing device 7 detects the packing box X at the same time by both the second photoelectric sensor 3 and the third photoelectric sensor 4, the reading control processing device 7 causes the camera 5 to stop imaging.

Further, in the present embodiment, the reading control processing device 7 determines that the entire packaging box X is housed in the imaging area Ra based on the detection results of the second photoelectric sensor 3 and the third photoelectric sensor 4. The reading control processing device 7 causes the camera 5 to take an image of the image pickup area Ra in a state where the entire packing box X is housed in the image pickup area Ra. As a result, the image pickup data including the packing box X is created by the camera 5. That is, in the present embodiment, based on the detection result of the second photoelectric sensor 3 and the like, the imaging data including the packing box X is acquired under the control of the reading control processing device 7. As described above, when the camera 5 is directly connected to the second photoelectric sensor 3, the camera 5 takes an image of the imaging area Ra including the packing box X based on the detection result of the second photoelectric sensor 3. Create data.

Further, the reading control processing device 7 extracts the date information indicated on the packing box X from the imaging data including the packing box X. There are an extremely large number of types of date information notation patterns displayed on the packing box X. Therefore, the reading control processing device 7 is made to learn a large number of notation patterns of date information in advance. Further, the learning data may be updated based on the notation pattern of the newly extracted date information. The reading control processing device 7 extracts date information from the imaged data based on, for example, such learning data and an artificial intelligence algorithm.

In the present embodiment, the reading control processing device 7 determines that the date information extracted from the imaging data is the expiration date information or the expiration date information. For example, when the reading control processing device 7 indicates a future beyond the current date and time, the reading control processing device 7 determines that the date information extracted from the imaging data is the expiration date information or the expiration date information. On the other hand, for example, when the date information extracted from the imaging data indicates a past date and time beyond the current date and time, the extracted date information is determined to be the manufacturing date information. The reading control processing device 7 outputs the date information extracted in this way to the integrated control processing device 9. Further, the reading control processing device 7 stores the extracted date information and displays it on the display as needed so that the information can be visually output.

The conveyor control processing device 8 is connected to the conveyor 1 and controls the conveyor 1 under the control of the integrated control processing device 9. Such a conveyor control processing device 8 is composed of, for example, a single programmable logic controller. Further, for example, in the present embodiment, the conveyor control processing device 8 is also connected to the first photoelectric sensor 2 and the third photoelectric sensor 4. For example, the conveyor control processing device 8 stops the conveyor 1 when the packaging box X is continuously detected for a certain period set in advance by the first photoelectric sensor 2 and the third photoelectric sensor 4. The conveyor control processing device 8 is connected to, for example, a reset switch or an alarm (not shown), and can be restarted by pressing the reset switch or an alarm can be issued by the alarm, if necessary.

Further, in the present embodiment, the conveyor control processing device 8 controls the conveyor 1 so that the conveyor 1 is continuously moved from the upstream end to the downstream end of the conveyor 1 at a constant speed. That is, even when the packing box X passes in front of the barcode reader 6 or when the packing box X passes through the imaging area Ra, the transport conveyor is such that the packing box X is always moved at a constant speed. 1 is controlled.

By constantly moving the packing box X at a constant speed in this way, it is possible to continuously and efficiently process a large number of packing boxes X. However, in order to obtain stable imaging data, it is possible to reduce the moving speed of the packaging box X in the imaging area Ra or temporarily stop the packaging box X in the imaging area Ra.

Further, the conveyor control processing device 8 receives the bar code information detected by the bar code reader 6 and outputs the bar code information received from the bar code reader 6 to the integrated control processing device 9.

The integrated control processing device 9 is connected to the reading control processing device 7 and the conveyor control processing device 8, and controls the reading control processing device 7 and the conveyor control processing device 8. Further, in the present embodiment, the integrated control processing device 9 determines, for example, the type of the packing box X based on the bar code information input from the bar code reader 6, and then is input from the reading control processing device 7. The date information is stored in association with the type information of the packing box X.

In the present embodiment, in FIG. 1, the reading control processing device 7, the conveyor control processing device 8, and the integrated control processing device 9 are separated. However, the reading control processing device 7, the conveyor control processing device 8, and the integrated control processing device 9 do not necessarily have to be separated from each other, and some or all of them are composed of a single piece of hardware. You may be. For example, it is possible to adopt a configuration in which the read control processing device 7 and the integrated control processing device 9 are provided as one function of a single computer.

Subsequently, the operation of the date information reading device S1 of the present embodiment will be described with reference to the timing chart of FIG.

At the upstream end of the conveyor 1, for example, a worker or a delivery robot places the packing box X on the conveyor path of the conveyor 1. At this time, the packing box X is placed so that the side on which the date information and the bar code are written out of the plurality of sides of the packing box X faces the side on which the bar code reader 6 and the camera 5 are arranged. To. Further, the conveyor 1 is controlled so that the packing box X is always moved at a constant speed.

The packing box X placed on the upstream end of the conveyor 1 is conveyed at a constant speed toward the downstream of the conveyor 1. When the packing box X reaches the front position of the first photoelectric sensor 2 on the transport path R, the detection signal of the packing box X is output from the first photoelectric sensor 2. In the detection signal from the first photoelectric sensor 2, the upstream end of the packing box X in the transport direction reaches the front position of the first photoelectric sensor 2, and the downstream end of the packing box X in the transport direction is the first photoelectric sensor 2. It continues to be output until it passes the front position.

The detection signal output from the first photoelectric sensor 2 is input to the barcode reader 6. When the detection signal is input from the first photoelectric sensor 2, the bar code reader 6 reads the bar code written on the packing box X passing in front and outputs the bar code information. Such bar code information is received by the integrated control processing device 9 via the conveyor control processing device 8. When the bar code information is input, the integrated control processing device 9 identifies and stores individual information such as the type of the packing box X based on the bar code information.

When the packing box X reaches the front of the second photoelectric sensor 3 in the transport path R, the detection signal of the packing box X is output from the second photoelectric sensor 3. In the detection signal from the second photoelectric sensor 3, the upstream end of the packing box X in the transport direction reaches the front position of the second photoelectric sensor 3, and the downstream end of the packing box X in the transport direction is the second photoelectric sensor 3. It continues to be output until it passes the front position. That is, the detection signal from the second photoelectric sensor 3 continues to be output until the upstream end of the packaging box X enters the imaging area Ra and the entire packaging box X is accommodated in the imaging area Ra.

The reading control processing device 7 is stopped after the detection signal of the second photoelectric sensor 3 is input once (the second photoelectric sensor 3 is turned on and then turned off), and further, the third photoelectric sensor 4 is turned off. A shooting trigger is input to the camera 5 on condition that the detection signal of the above is not input (the third photoelectric sensor 4 is turned off). When a shooting trigger is input from the reading control processing device 7, the camera 5 takes an image of the image pickup area Ra. Here, since the packaging box X is housed in the imaging area Ra, the imaging data includes the packaging box X. The camera 5 creates, for example, a plurality of imaging data in chronological order.

The imaging data created by the camera 5 in this way is output from the camera 5 and received by the reading control processing device 7. When the imaging data is input, the reading control processing device 7 extracts date information from the imaging data. Here, the reading control processing device 7 determines that the date information is the date information (expiration date information or expiration date information) indicating the expiration date or the expiration date. The reading control processing device 7 outputs the date information to the integrated control processing device 9 together with such a determination result.

The integrated control processing device 9 stores the date information input from the reading control processing device 7 in association with the individual information such as the type of the packing box X previously specified based on the barcode information. The integrated control processing device 9 inputs to the reading control processing device 7 that the date information association processing is completed.

When the packing box X reaches the front of the third photoelectric sensor 4 on the transport path R, the detection signal of the packing box X is output from the third photoelectric sensor 4. In the detection signal from the third photoelectric sensor 4, the upstream end of the packing box X in the transport direction reaches the front position of the third photoelectric sensor 4, and the downstream end of the packing box X in the transport direction is the third photoelectric sensor 4. It continues to be output until it passes the front position. That is, the detection signal from the third photoelectric sensor 4 continues to be output until the entire packaging box X comes out of the imaging area Ra.

Here, the reading control processing device 7 stops the imaging by the camera 5 if the imaging by the camera 5 is not stopped by the timing when the detection signal of the packing box X is output from the third photoelectric sensor 4.

In the conveyor control processing device 8 or the integrated control processing device 9, the timing at which the first photoelectric sensor 2 changes from the on state (the state in which the detection signal is output) to the off state (the state in which the detection signal is not output). If the barcode information is not entered in, it is considered as a barcode no-read error. When a bar code no-read abnormality is found, the conveyor control processing device 8 or the integrated control processing device 9 stops the transfer to the transfer conveyor 1 when the detection signal from the third photoelectric sensor 4 is received, and causes an abnormality. Issue to the outside.

Further, the reading control processing device 7 outputs a date information no-read signal when the date information cannot be extracted from the imaging data. The integrated control processing device 9 receives the date information no-read signal. When the detection signal from the third photoelectric sensor 4 is received, the conveyor 1 stops the transfer and emits an abnormality to the outside. When the integrated control processing device 9 receives the date information no-read signal a plurality of times for the same packing box X, the integrated control processing device 9 notifies the worker, for example, that the date information is manually input.

The date information reading device S1 of the present embodiment as described above is a first photoelectric sensor that detects that the packaging box X has entered the imaging area Ra provided in the transport path R of the transport conveyor 1 that conveys the packaging box X. The date information indicated on the packaging box X from the imaging data including the packaging box X obtained based on the detection result of the first photoelectric sensor 2, the camera 5 that captures the imaging area Ra and creates the imaging data, and the packaging box X. It is provided with a reading control processing device 7 for extracting data.

According to the date information reading device S1 of the present embodiment as described above, the packing box X that has entered the imaging area Ra is imaged, and the date information is extracted based on the imaging data. Therefore, it is possible to automatically read the date information written on the packing box X without performing the reading work by the worker's handy terminal.

Further, the date information reading device S1 of the present embodiment adopts a configuration in which a third photoelectric sensor 4 for detecting the presence / absence of the packing box X is provided at a position downstream of the imaging area Ra in the transport path R. Therefore, it is possible to know that the packaging box X protrudes from the imaging area Ra and that the entire packaging box X protrudes from the imaging area Ra. It is also possible to install a mechanical sensor such as a limit switch instead of the third photoelectric sensor 4 or the like.

Further, the date information reading device S1 of the present embodiment includes a reading control processing device 7 for causing the camera 5 to image the packing box X based on the detection result of the first photoelectric sensor 2, and the reading control processing device 7 is the first. 1 After the photoelectric sensor 2 detects the entry of the packing box X into the imaging area Ra, if the third photoelectric sensor 4 detects the packing box X, the camera 5 stops the imaging. Therefore, when the image pickup area Ra protrudes from the packing box X, the date information extraction process can be stopped, and it is possible to prevent the date information extraction process from proceeding in an incomplete state. ..

Further, in the date information reading device S1 of the present embodiment, the bar code reader 6 arranged at a position upstream of the imaging area Ra on the transport path R and the bar code reader 6 located upstream of the bar code reader 6 on the transport path R. It is provided with a first photoelectric sensor 2 that is arranged and detects the presence or absence of the packing box X and outputs a signal for activating the barcode reader 6. Therefore, prior to the acquisition of the date information, it is possible to acquire the individual information of the packing box X to which the date information is associated.

Further, in the date information reading device S1 of the present embodiment, the reading control processing device 7 determines that the date information on which the imaging data is captured is the expiration date information or the expiration date information. Therefore, when the expiration date or the expiration date is indicated on the packing box X, it is possible to surely grasp the expiration date or the expiration date.

Further, the date information reading device S1 of the present embodiment includes a conveyor 1. It is also possible to extract date information from the packing box X that is conveyed by an external conveyor without the conveyor 1. However, by providing the transfer conveyor 1 like the date information reading device S1 of the present embodiment, the transfer conveyor 1 suitable for extracting the date information can be obtained. For example, the transfer speed of the packing box X can be extracted from the date information. The speed can be suitable for.

Further, in the date information reading device S1 of the present embodiment, the first photoelectric sensor 2 is arranged at an upstream position of the imaging area Ra in the transport path R and detects the presence or absence of the packing box X at the arranged position. Therefore, it is possible to detect that the packaging box X has entered the imaging area Ra with a simple sensor configuration.

(Second Embodiment)
Next, the second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In the description of the second embodiment, the description of the same parts as those of the first embodiment will be omitted or simplified.

FIG. 3 is a plan view schematically showing a schematic configuration of the date information reading device S2 of the second embodiment. The date information reading device S1 of the present embodiment replaces the second photoelectric sensor 3 and the third photoelectric sensor 4 installed in the date information reading device S1 of the first embodiment with an area sensor 10 (entry detection unit). I have.

The area sensor 10 is a sensor that detects the presence or absence of the packaging box X in a plane or three-dimensional manner in the imaging area Ra. In the area sensor 10, for example, as shown in FIG. 3, the light emitting unit and the receiving unit are arranged so as to be orthogonal to the transport direction of the packing box X in a plan view, and these light emitting unit and the light receiving unit are arranged. Are arranged to face each other so as to sandwich the imaging area Ra in between.

Such an area sensor 10 can detect whether or not the upstream end position and the downstream end position of the packing box X are located in the imaging area Ra. Such an area sensor 10 is connected to the reading control processing device 7, and outputs a detection result to the reading control processing device 7. Further, the area sensor 10 is connected to the conveyor control processing device 8 and outputs a detection result to the conveyor control processing device 8.

By detecting the upstream end of the packing box X with the area sensor 10, it can be seen that the upstream end of the packing box X has entered the imaging area Ra. Further, it can be seen from the area sensor 10 that the downstream end of the packing box X has entered the imaging area Ra. The second photoelectric sensor 3 outputs the detection result to the reading control processing device 7. For example, if the area sensor 10 does not detect the downstream end of the packing box X and the upstream end of the packing box X cannot be detected, the packing box X protrudes from the imaging area Ra. It turns out that the size is out of the standard.

The area sensor 10 is also used as a sensor for determining whether or not the packing box X has been carried out from the imaging area Ra. For example, if the area sensor 10 detects the packing box X and then the area sensor 10 does not detect the packing box X, it can be seen that the entire packing box X has come out of the imaging area Ra.

The camera 5 also takes an image of the imaging area Ra under the control of the reading control processing device 7 in the present embodiment. The camera 5 may be directly connected to the area sensor 10 so that the camera 5 takes an image according to the output of the area sensor 10.

As shown in FIG. 1, the reading control processing device 7 is electrically connected to the camera 5 and the area sensor 10. The reading control processing device 7 detects that the packing box X has entered the imaging area Ra from the detection result of the area sensor 10, and also indicates that the packing box X has been discharged from the imaging area Ra from the detection result of the area sensor 10. Detect.

When the reading control processing device 7 detects both the upstream end and the downstream end of the packing box X even though the packing box X is detected by the area sensor 10. , It is determined that the packaging box X has a nonstandard size, and the determination result is output to the integrated control processing device 9. Further, when the reading control processing device 7 detects both the upstream end and the downstream end of the packing box X even though the packing box X is detected by the area sensor 10, the reading control processing device 7 does not detect both the upstream end and the downstream end of the packing box X. The reading control processing device 7 causes the camera 5 to stop imaging.

Further, in the present embodiment, the reading control processing device 7 determines that the entire packaging box X is housed in the imaging area Ra based on the detection result of the area sensor 10. The reading control processing device 7 causes the camera 5 to take an image of the image pickup area Ra in a state where the entire packing box X is housed in the image pickup area Ra. As a result, the image pickup data including the packing box X is created by the camera 5. That is, in the present embodiment, based on the detection result of the area sensor 10, the imaging data including the packing box X is acquired under the control of the reading control processing device 7. As described above, when the camera 5 is directly connected to the area sensor 10, the camera 5 creates imaging data of the imaging area Ra including the packing box X based on the detection result of the area sensor 10. ..

Further, for example, in the present embodiment, the conveyor control processing device 8 is also connected to the first photoelectric sensor 2 and the area sensor 10. For example, the conveyor control processing device 8 stops the conveyor 1 when the first photoelectric sensor 2 and the area sensor 10 continuously detect the packing box X for a predetermined period of time.

FIG. 4 is a timing chart for explaining the operation of the date information reading device S2 of the present embodiment.

In the present embodiment, when the packing box X reaches the detection range of the area sensor 10 (that is, the imaging area Ra) on the transport path R, the detection signal of the packing box X is output from the area sensor 10. Note that FIG. 4 shows whether or not a signal indicating that the entire packaging box X is housed in the imaging area Ra is output from the area sensor 10. That is, in FIG. 4, when the area sensor 10 is on, it means that the entire packing box X is housed in the imaging area Ra. Further, in FIG. 4, the state in which the area sensor 10 is off indicates a state in which a part or the whole of the packing box X is not housed in the imaging area Ra.

The reading control processing device 7 inputs a shooting trigger to the camera 5 when a signal indicating that the entire packing box X is housed in the imaging area Ra is input from the area sensor 10. When a shooting trigger is input from the reading control processing device 7, the camera 5 takes an image of the image pickup area Ra. Here, since the packaging box X is housed in the imaging area Ra, the imaging data includes the packaging box X.

The reading control processing device 7 stops the imaging by the camera 5 when the area sensor 10 is in the off state and the imaging by the camera 5 is not stopped. Further, the reading control processing device 7 outputs a date information no-read signal when the date information cannot be extracted from the imaging data. When the integrated control processing device 9 receives the date information no-read signal, when the area sensor 10 is turned off, the integrated control processing device 9 stops the transfer to the transfer conveyor 1 and issues an abnormality to the outside.

In such a date information reading device S2 of the present embodiment, the area sensor 10 for detecting that the packing box X has entered the imaging area Ra provided in the transport path R of the transport conveyor 1 for transporting the packing box X , The camera 5 that captures the imaging area Ra to create imaging data, and the reading that extracts the date information indicated on the packaging box X from the imaging data including the packaging box X obtained based on the detection result of the area sensor 10. It includes a control processing device 7.

According to the date information reading device S2 of the present embodiment as described above, the packing box X that has entered the imaging area Ra is imaged, and the date information is extracted based on the imaging data. Therefore, it is possible to automatically read the date information written on the packing box X without performing the reading work by the worker's handy terminal.

Further, in the date information reading device S2 of the present embodiment, the presence / absence of the packing box X in the imaging area Ra is detected by the area sensor 10. Therefore, the state of the imaging area Ra can be grasped more accurately.

(Third Embodiment)
Next, the third embodiment of the present invention will be described with reference to FIGS. 5 and 6. In the description of the third embodiment as well, the description of the same parts as those of the first embodiment will be omitted or simplified.

FIG. 5 is a plan view schematically showing a schematic configuration of the date information reading device S3 of the third embodiment. As shown in FIG. 5, in the date information reading device S3 of the present embodiment, the transport conveyor 1 has an upstream portion 1a for transporting the packing box X from the right side to the left side of FIG. It is provided with a transport direction changing portion 1b for changing from the direction from the left side to the lower side in FIG. 5 and a downstream portion 1c for transporting the packing box X from the upper side to the lower side. Such a transfer conveyor 1 forms a transfer path R bent at an intermediate portion in a plan view, and changes the transfer direction of the packing box X.

The upstream portion 1a includes a plurality of rollers arranged in the left-right direction in FIG. Further, the downstream portion 1c includes a plurality of rollers arranged in the vertical direction of FIG. Further, the transport direction changing unit 1b is made possible to move up and down between a plurality of rollers arranged in the left-right direction of FIG. 5 and transporting the packing boxes X along the left-right direction, and these rollers, and FIG. It is provided with a plurality of belt units for transporting the packing box X in the vertical direction of the above. The transport direction changing portion 1b includes a so-called up / down unit. In the present embodiment, the image pickup area Ra is provided on the transfer direction changing portion 1b of the transfer conveyor 1.

In the present embodiment, the third photoelectric sensor 4 is not used as a sensor for determining whether or not the packing box X protrudes from the imaging area Ra, and is packed from the imaging area Ra. It is also used as a sensor for determining whether or not the box X has been carried out.

Further, in the present embodiment, as shown in FIG. 5, two cameras 5 (side camera 5a and front camera 5b) are installed. The side camera 5a is arranged on the same side as the barcode reader 6 with respect to the transport path R, similarly to the camera 5 installed in the first embodiment.

The front camera 5b is arranged on the left side in FIG. 5 of the transport direction changing portion 1b so that the side surface of the packing box X can be imaged from the upstream side of the packing box X in the transport direction in the upstream portion 1a. As described above, in the present embodiment, as shown in FIG. 5, the optical axis of the side camera 5a and the optical axis of the front camera 5b are installed so as to be orthogonal to each other in a plan view. That is, in the present embodiment, a plurality of cameras 5 that capture the packaging box X of the imaging area Ra from different directions are provided.

The side camera 5a and the front camera 5b are connected to the reading control processing device 7, and in the present embodiment, the imaging area Ra is imaged under the control of the reading control processing device 7. The side camera 5a and the front camera 5b may be directly connected to the second photoelectric sensor 3 or the like, and the side camera 5a and the front camera 5b may take an image according to the output of the second photoelectric sensor 3 or the like. ..

Such a side camera 5a and a front camera 5b take an image of the image pickup area Ra including the packing box X that has entered the image pickup area Ra. Therefore, in the present embodiment, of the side surfaces of the packing box X, the side surface oriented in the direction orthogonal to the transport direction in the plan view is imaged by the side camera 5a, and is along the transport direction in the plan view. The side surface is imaged by the front camera 5b in the direction.

FIG. 6 is a timing chart for explaining the operation of the date information reading device S3 of the present embodiment.

At the upstream end of the conveyor 1, for example, a worker or a delivery robot places the packing box X on the conveyor path of the conveyor 1. At this time, of the plurality of sides of the packing box X, the side on which the date information and the bar code are written is oriented so as to face the side on which the bar code reader 6, the side camera 5a, or the front camera 5b is arranged. Box X is placed.

The packing box X placed on the upstream portion 1a of the transfer conveyor 1 is conveyed toward the transfer direction changing portion 1b at a constant speed. The reading control processing device 7 is subject to the condition that the detection signal of the second photoelectric sensor 3 is input once and then the input is stopped (the second photoelectric sensor 3 is turned on and then turned off). A shooting trigger is input to the side camera 5a and the front camera 5b.

When the reading control processing device 7 inputs a shooting trigger, the side camera 5a and the front camera 5b take a picture of the picture pickup area Ra. Here, since the packaging box X is housed in the imaging area Ra, the imaging data includes the packaging box X. The side camera 5a and the front camera 5b create, for example, a plurality of imaging data in time series.

The imaging data created by the side camera 5a and the front camera 5b in this way is output from the side camera 5a and the front camera 5b and received by the reading control processing device 7. When the imaging data is input, the reading control processing device 7 extracts date information from the imaging data. The read control processing device 7 outputs date information to the integrated control processing device 9.

The integrated control processing device 9 stores the date information input from the reading control processing device 7 in association with the individual information such as the type of the packing box X previously specified based on the barcode information. The integrated control processing device 9 inputs to the reading control processing device 7 that the date information association processing is completed.

Further, when the date information is input from the read control processing device 7, the integrated control processing device 9 outputs a signal indicating that the date information has been received to the conveyor control processing device 8. When the conveyor control processing device 8 receives a signal indicating that the date information has been received from the integrated control processing device 9, the conveyor control processing device 8 raises the belt unit of the transport direction changing unit 1b of the conveyor 1 and lowers the packing box X downstream. It is conveyed toward 1c.

When the packing box X reaches the front of the third photoelectric sensor 4 on the transport path R, the detection signal of the packing box X is output from the third photoelectric sensor 4. In the detection signal from the third photoelectric sensor 4, the upstream end of the packing box X in the transport direction reaches the front position of the third photoelectric sensor 4, and the downstream end of the packing box X in the transport direction is the third photoelectric sensor 4. It continues to be output until it passes the front position. That is, the detection signal from the third photoelectric sensor 4 continues to be output until the entire packaging box X comes out of the imaging area Ra.

The conveyor control processing device 8 lowers the belt unit of the transport direction changing unit 1b to return to the origin on the condition that the third photoelectric sensor 4 is turned on and then turned off. As a result, the packaging box X to be transported next can be received in the imaging area Ra.

Also in the date information reading device S3 of the present embodiment as described above, the first photoelectric sensor that detects that the packaging box X has entered the imaging area Ra provided in the transport path R of the transport conveyor 1 that conveys the packaging box X. The date information indicated on the packaging box X from the imaging data including the packaging box X obtained based on the detection result of the first photoelectric sensor 2, the camera 5 that images the imaging area Ra and creates the imaging data, and the packaging box X. It is provided with a reading control processing device 7 for extracting data. Therefore, it is possible to automatically read the date information written on the packing box X without performing the reading work by the worker's handy terminal.

Further, in the date information reading device S3 of the present embodiment, the conveyor 1 is provided with a transport direction changing unit 1b for changing the transport direction of the packing box X, and an imaging area Ra is provided in the transport direction changing unit 1b. .. Therefore, the conveyor 1 can be formed by bending in a plan view, and it becomes easy to take an image from the front side (left side in FIG. 5) when the packing box X enters the image pickup area Ra. Therefore, according to the present embodiment, the packaging box X can be easily imaged from different directions.

Further, the date information reading device S3 of the present embodiment includes a plurality of cameras 5 that capture images of the packaging box X of the imaging area Ra from different directions. Therefore, as compared with the case where only one camera 5 is provided, the number of surfaces on which date information can be extracted increases, and it is possible to improve the degree of freedom of posture when the packing box X is placed on the conveyor 1. ..

The date information reader S3 of the present embodiment can be changed to the second photoelectric sensor 3 and the third photoelectric sensor 4 as in the date information reader S2 of the second embodiment.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above embodiment. The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like without departing from the spirit of the present invention.

For example, in the above embodiment, the configuration in which the camera 5 captures images based on the input signals from the photoelectric sensor and the area sensor has been described. However, the present invention is not limited to this. For example, the camera 5 may constantly perform imaging, and the date information may be extracted using the imaging data at the time when the entire packaging box X is accommodated in the imaging area Ra. In such a case, for example, the reading control processing device 7 constantly receives the imaging data, and the reading control processing device 7 detects that the packing box X has entered the imaging area Ra. That is, the reading control processing device 7 functions as an approach detection unit that detects that the packaging box X has entered the imaging area Ra.

Further, in the above embodiment, the configuration including the camera 5 that mainly captures the side surface of the packing box X has been described. However, the present invention is not limited to this. For example, it is possible to adopt a configuration including a camera that images the upper surface of the packing box X.

1 ... Conveyance conveyor (conveyance unit), 1a ... upstream part, 1b ... transfer direction changing part, 1c ... downstream part, 2 ... 1st photoelectric sensor (bar code reader activation sensor), 3 ... 2nd Photoelectric sensor (entrance detection unit), 4 ... 3rd photoelectric sensor (downstream position sensor), 5 ... camera (imaging unit), 5a ... side camera, 5b ... front camera, 6 ... bar code reader, 7 …… Reading control processing device (date information acquisition unit, imaging control unit), 8 …… Conveyor control processing device, 9 …… Integrated control processing device, 10 …… Area sensor, R …… Transport path, Ra …… Imaging Area, S1 ... Date information reader, S2 ... Date information reader, S3 ... Date information reader, X ... Packing box (reading object)

Claims (8)

An intrusion detection unit that detects that the reading object has entered the imaging area provided in the transportation path of the transportation unit that conveys the reading object,
An imaging unit that images the imaging area and creates imaging data,
A date information acquisition unit that extracts date information indicated on the read object from the imaging data including the read object obtained based on the detection result of the intrusion detection unit, and a date information acquisition unit .
A downstream position sensor that detects the presence or absence of the object to be read at a position downstream of the imaging area in the transport path, and
An imaging control unit that causes the imaging unit to image the object to be read based on the detection result of the approach detection unit.
With
After the approach detection unit detects the entry of the reading object into the imaging area, the imaging control unit captures the image on the imaging unit when the reading target is detected by the downstream position sensor. A date information reader characterized by stopping. The bar code reader arranged at a position upstream of the imaging area on the transport path and the bar code reader placed at a position upstream of the bar code reader on the transport path and detect the presence / absence of the object to be read. date information reading apparatus according to claim 1, characterized in that it comprises a bar code reader start sensor for outputting a signal to activate the bar code reader. The date information reading device according to claim 1 or 2, wherein the date information acquisition unit determines the date information as expiration date information or expiration date information. The date information reading device according to any one of claims 1 to 3, further comprising the transport unit. The transport unit includes a transport direction changing unit that changes the transport direction of the object to be read.
The date information reading device according to claim 4 , wherein the image pickup area is provided in the transport direction changing unit. The date information reading device according to any one of claims 1 to 5 , further comprising a plurality of the imaging units that image the object to be read in the imaging area from different directions. Any one of claims 1 to 6 , wherein the approach detection unit is a sensor that is arranged at an upstream position of the imaging area in the transport path and detects the presence or absence of the reading object at the arrangement position. The date information reader described in. The date information reading device according to any one of claims 1 to 6 , wherein the approach detection unit is an area sensor that detects the presence or absence of the reading target object in the imaging area.

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