JP5287300B2 - Weighing conveyor - Google Patents

Description

  The present invention relates to a weighing conveyor for weighing an article while conveying the article, and more particularly to a weighing conveyor for weighing an article having a different length with a weighing device according to the length.

As a method for weighing the articles conveyed by the conveyance conveyor during conveyance, a so-called single balance method is generally used in which the measurement is performed by a single weighing conveyor equipped with weighing means (weighing device). In order to obtain an accurate measurement value by this single balance method, it is necessary to adjust the interval between articles to be conveyed so that a plurality of articles are not placed on the weighing conveyor. Therefore, in the situation where a wide variety of articles are automatically and continuously conveyed, it is difficult to cope with the single balance method.
That is, with respect to a weighing conveyor that measures the weight of an article while conveying an article having a different length, the weighing can correctly measure the weight of the article in a short time, and the weighing improves the carrying efficiency and weighing capacity of the article. A conveyor was desired in the market.
In order to achieve the above-mentioned object, two conveyors equipped with conveying means for conveying articles and weighing means for weighing the weight are arranged in series and adjacent to each other, and outputs (measurement values) of the respective weighing means are set. A weighing conveyor that measures the weight of an article by arbitrarily combining and adding has been proposed (for example, see Patent Document 1).

However, when the weighing conveyor (multiple scale device) described in Patent Document 1 measures the weight of an article while conveying the article, when the article is placed across the two weighing conveyors, The following stresses act on the two weighing means across the article. That is, the weighing conveyor located on the front side (first unit) facing in the conveying direction has an obliquely downward force opposite to the conveying direction, and is conveyed on the weighing conveyor located on the other side (second unit) facing in the conveying direction. Each diagonal downward force works. In addition, depending on the transport position of the article to be transported, the weighing conveyor located on the front side (first unit) facing in the transport direction is now subject to a pulling force by the weighing conveyor located on the other side (second unit) facing in the transport direction. In addition, a downward stress is generated in the conveying direction, and the weighing conveyor located in the opposite direction (second unit) in the conveying direction has a force pushed from the measuring conveyor located in the front side (first unit) in the conveying direction. In addition, the stress is generated while the stress is changed depending on the transport position of the article to be transported, such as a further downward stress in the transport direction, which affects the measurement of the measuring means. As a result, the weighing means included in the two weighing conveyors measure the load applied in the vertical direction, but measure the load applied with the stress in the oblique direction and output the measured value. .
Therefore, since the two weighing conveyors measure the load applied with the stress in the oblique direction by the weighing means, the measured value to be output cannot be said to be a correct measured value, and this incorrect measured value is not used. The measured value of the article obtained by adding up is naturally not a correct value.

  In addition, the actual device based on Patent Document 1 is designed and manufactured with two weighing conveyors (weighing devices) in consideration of the test tolerance, but is assembled in consideration of the stress generated during the conveyance of the article. Therefore, even if the measured values of the two weighing conveyors are added together, the correct measured value cannot be obtained, resulting in a measurement accuracy that is out of the test tolerance.

JP-A-10-122940

  The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to load the slant by the stress of the transported article acting on the weighing means in a multi-scale weighing conveyor. There is provided a weighing conveyor capable of correctly measuring the weight of an article in a short time and improving the conveyance efficiency and weighing capacity of the article even if correct measurement cannot be performed due to the addition of.

In order to achieve the above object, a weighing conveyor according to the present invention is a weighing conveyor comprising conveying means for conveying an article, and weighing means for weighing the article while conveying the article by the conveying means, wherein the conveying means And a plurality of transport weighing devices including the weighing means are arranged in series and adjacent to each other on the base-side weighing device so that the conveyance direction is in a straight line and can be continuously conveyed. A measuring unit that measures the length of an article conveyed by a conveying unit included in the apparatus, and the plurality of conveying and weighing devices, the base-side weighing device, according to the length of the article measured by the measuring unit. And a selection means for selecting the output measurement value (claim 1).
The transport and weighing device that constitutes the weighing conveyor need only have two or more transport and weighing devices having different lengths, and the transport and weighing devices are arranged in order from the longest length along the transport direction, or vice versa. Arranging in order from the shortest of the captain, or arranging irregularly may be used.
The conveying means of the conveying and weighing device may be either a belt conveyor or a roller conveyor.
The weighing device equipped in the transport weighing device and the weighing device is not limited to a load cell (strain gauge type) widely used as a force detector, but is an electromagnetic force balanced type, a metal tuning fork vibration type, a string vibration, which are gathered as a servo system. You may comprise using a load meter of a type | formula, an electrostatic capacitance type, a piezoelectric type, a magnetostriction type, a gyro type, or a hydraulic type.
The position at which the measuring means is arranged is not limited to the entire length of the conveying and weighing device arranged in series, but may be arranged on the carry-in conveyor side arranged continuously on the upstream side of the weighing conveyor. However, when the measuring means is arranged within the total length of the conveying and weighing apparatus arranged in series, the length of the article is determined by the measuring means (sensor), the detection time of the article, and the conveying speed of the conveying means for conveying the article. Therefore, the speed of the transport means of the transport weighing devices arranged in series is the same speed.
In addition, the measuring means is not limited to the above, and a device that generates a pulse signal synchronized with the conveyance by the conveying means and a distance signal by detecting the distance to the article conveyed by the conveying means in a non-contact manner. The displacement sensor to output, and the distance signal are sampled, and a signal for determining that the end of the article is detected when a sequential change in the sample value is detected is output. Based on the end determination signal, the pulse is output. A signal processing circuit that counts the signal and measures the dimension of the object in the moving direction with the end as a reference, and a method of accurately measuring the length dimension of the article may be used.
According to the length of the article measured by the measuring means, the selection means selects the transport weighing device and the weighing value of the weighing device. The scale selection information in which the length range of the target article is set is stored in the storage means, and the selection means is based on the length dimension of the article measured by the measurement means and the scale selection information stored in the storage means Or a method for providing the weighing scale selection information (data) in the program, and further, an article detection sensor is provided at both ends of the transport weighing device, and an ON / OFF output signal output by the article detection sensor A method of selecting a weighing device according to a combination or order thereof, a method of simply selecting a weighing device depending on whether or not an article protrudes, and the like can be mentioned.
The selection means and the like are stored in a microcomputer or the like constituting a control panel (console) installed near the weighing conveyor.

  According to the above means, for example, the weight of the article corresponding to the captain of each transport weighing device is selected and adopted based on the scale selection information stored in advance in the storage means, and the captain is selected and adopted. Articles longer than the longest conveyance weighing device are weighed across a plurality of conveyance weighing devices arranged in series. At this time, the stress described in the section of the background art is applied to both the transfer weighing devices, and the weighing means of each transfer weighing device applies a load in which an oblique stress generated depending on the transfer position of the article to be transferred is applied. Since the measurement value cannot be output correctly, it is impossible to output the correct measurement value. However, since the transport weighing device is stacked on the weighing device having only the weighing means, the weighing value of the weighing device is determined by the selection means. Selected. Thereby, a correct measured value can be obtained.

  In addition, when any abnormality occurs in the transporting means, the weighing means, and the measuring means, the weighing conveyor is notified by the notifying means of notifying that the abnormality has occurred and its details, and the notifying means. It is good also as a structure provided with the stop means to stop the conveyance means of the said conveyance weighing apparatus (Claim 2).
  Examples of the notification means include a buzzer sound, red lighting, or voice output.

  According to the above-described means, the operator can know what abnormality has occurred during which article is being conveyed, which is being weighed by which carrying weighing apparatus, or during weighing by the base-side weighing apparatus. Moreover, since the transport means of the transport and weighing device is stopped when an abnormality occurs, it is possible to avoid the danger to workers and the risk of each device causing a secondary disaster or a secondary failure. it can.

  As a specific example of the weighing conveyor, for example, there are two conveyance weighing devices, and the measuring means is arranged between the two conveyance weighing devices arranged in series (Claim 3).
  As the measuring means, for example, article detection sensors are arranged in a vertical line at a predetermined interval on opposite vertical sides of a gate-shaped frame, and the horizontal width of the article is detected on the horizontal side. The detection sensors are arranged on the left and right with an interval.

  According to the above means, the weight value of the article having a length corresponding to the length of the two transport weighing devices arranged in series is selected from the weighing value of the weighing means possessed by the corresponding transport weighing device, The weight value of an article longer than the length of the machine is selected from the measurement value of the lower weighing device. That is, since the weight of an article having a length over two transport weighing devices is also determined by the measurement value of a single weighing device arranged in the lower stage, a correct weighing value can be obtained.
  In addition, since the measuring means for measuring the length of the article is arranged between the two transport weighing devices, before the length is measured by the measuring device, the measuring means of the first transport weighing device is used. Since the measurement is completed, if the measurement result of the measuring means is a length corresponding to the machine length of the first transport weighing device, the measured value of the first transport weighing device will be Determined as the weight value of the article. Therefore, the measurement efficiency can be increased.

  Each of the plurality of transport and weighing devices placed on the weighing device on the base side of the weighing conveyor includes a transport unit and a weighing unit, but at least one of the plurality is only a transport unit that does not include the weighing unit. It is good also as the comprised conveying apparatus. That is, a transport device that includes a transport unit but does not include a weighing unit, and a transport and weighing device that includes the transport unit and the weighing unit are continuously transported on a base-side weighing device in a straight transport direction. A measuring means for measuring the length of an article that is arranged in series and adjacent to each other and is conveyed by a conveying means included in the conveying apparatus and the conveying and weighing apparatus; and a length of the article measured by the measuring means According to this, it is good also as a structure provided with the selection means which selects the measured value output from the said conveyance weighing | measuring apparatus and the base side weighing | measuring apparatus.
  As a specific example in that case, for example, a transport device and a transport weighing device are addressed to one unit, and the measuring means is arranged between the transport device and the transport weighing device (Claim 6).

  According to the above means, even if at least one of the plurality of transport weighing devices arranged in the upper stage is a transport device including only a transport device that does not include the weighing device, the article to be transported is the transport device and the transport weighing device. The transport device and the transport weighing device are placed on a base-side weighing device having only a weighing means, so that stress is applied to the weighing means of the base-side weighing device. There is no impact. As a result, the correct measurement value can be measured as in the case where the transport weighing device placed on the base-side weighing device is configured with all weighing means. In addition, since the number of measuring means can be reduced, the cost can be reduced.
  In the configuration of the specific example, the weight value of the article having a length that can be accommodated within the captain of the conveyance weighing device is selected from the measurement value of the weighing means provided in the conveyance weighing device, and the weight value of the article having the other length is selected. Are all selected from the weighing values of the weighing means included in the weighing device.

  In addition, when any abnormality occurs in the transporting means, the weighing means, and the measuring means, the weighing conveyor is notified by the notifying means of notifying that the abnormality has occurred and its details, and the notifying means. It is good also as a structure provided with the stop means which stops the said conveying apparatus and the conveying means of the said conveyance weighing apparatus.
  Examples of the notification means include a buzzer sound, red lighting, or voice output.

  According to the above means, the operator can determine what abnormality has occurred during which article is being conveyed by which conveyance device or conveyance weighing device, during weighing by the conveyance weighing device, or during weighing by the weighing device on the base side. I can know. Moreover, since the transport means of the transport device and the transport weighing device are stopped when an abnormality occurs, it avoids the danger to workers and the risk that each device will cause a secondary disaster or a secondary failure. can do.

  The weighing conveyor may include a display unit that displays the measurement value selected by the selection unit and the measurement value measured by the measurement unit.
  The display means is constituted by, for example, a liquid crystal display and is provided on a control panel (console).
  According to the above means, it is possible to easily visually check the measurement value and the measurement value of the article currently being weighed. Thereby, the operation state of the weighing conveyor can be easily confirmed.

  In addition, the weighing conveyor may include a communication unit that transmits the display content displayed on the display unit to an upper management device.
  The information transmitted by the communication unit includes at least the measurement value of the article selected by the selection unit and the measurement value measured by the measurement unit.
  According to the above means, since the correct measured value and measured value for each article are displayed on the display means and simultaneously transmitted to the upper management device, the received management device is based on the correct weight value (measured value) and measured value. Thus, for example, a shipping price, a selling price, etc. can be calculated.

The weighing conveyor according to the present invention has the configuration according to claim 1, and the weight of articles below the allowable length of each conveyance weighing device is selected and adopted from the measurement value of each conveyance weighing device. For long articles, the weighing value of the weighing device on the base side on which the plurality of transfer weighing devices are mounted is selected and adopted. That is, as the weight of each article, the measurement value of the weighing means corresponding to the length of the article is adopted, so that a correct measurement value can be obtained.
In addition, according to the configuration of claim 2, the operator can know what abnormality has occurred during which article is being conveyed, which is being weighed by which weighing device, or during weighing by the weighing device on the base side. it can. Moreover, since the transport means of the transport and weighing device is stopped when an abnormality occurs, it is possible to avoid the danger to workers and the risk of each device causing a secondary disaster or a secondary failure. it can.
In addition, according to the configuration of claim 3, the weight of the article spanning two transport weighing devices or the length of the article spanning two transport weighing devices is also arranged on the single base side arranged in the lower stage. Since it is determined by the weighing value of the weighing device, a correct weighing value can be obtained.
And the measurement efficiency can be improved by arranging the measuring means between the two transport weighing devices. Therefore, it is possible to provide a weighing conveyor capable of improving temporal measurement efficiency and weighing capacity.

Furthermore, according to the configuration of claim 4, it is possible to provide a weighing conveyor having the same weighing capacity with a smaller number of weighing means than the configuration of claim 1, and to manufacture at a low cost because the number of weighing means is small. Can do.
In addition, according to the configuration of claim 5, the operator can find out what abnormality occurs during which conveyance weighing device, which article is being conveyed by the conveyance device, during weighing by the conveyance weighing device, or during weighing by the base-side weighing device. You can know what happened. Moreover, since the transport weighing device or the transport means of the transport device is stopped when an abnormality occurs, it avoids the danger to workers and the risk of each device causing a secondary disaster or a secondary failure. can do.
In addition, according to the configuration of claim 6, the weight of an article having a length straddling the two transport weighing devices or an article having a length straddling the transport device and the transport weighing device is also set on the single base side arranged in the lower stage. Since it is determined by the weighing value of the weighing device, a correct weighing value can be obtained.
And the measurement efficiency can be improved by arrange | positioning a measurement means between a conveying apparatus and a conveyance weighing apparatus. Therefore, it is possible to provide a weighing conveyor capable of improving temporal measurement efficiency and weighing capacity.

Further the configuration according to claim 7 Symbol mounting, be confirmed visually metric of an article that is currently transported weighed and the measured value can be easily. Thereby, the operation state of the weighing conveyor can be easily confirmed.
Further, according to the configuration of the eighth aspect, since the correct measurement value and measurement value for each article are displayed on the display means and simultaneously transmitted to the upper management device, the received management device receives the correct weight value (measurement value). Based on the measured value, for example, a shipping price, a selling price, etc. can be calculated.

The front view which shows an example of embodiment of the weighing conveyor which concerns on this invention. FIG. The same side view. It is an enlarged view which shows a measurement means part, (a) is a vertical side view, (b) is the vertical front view. Electric block diagram of a weighing conveyor. The figure which shows the content of the article | item data memorize | stored in RAM. The figure which shows the content of the shipping destination data memorize | stored in RAM. The figure which shows the content of the shipment work data memorize | stored in RAM. The figure which shows the content of the scale selection information memorize | stored in RAM. The figure which shows an example of the measurement data memorize | stored in RAM. It is a figure which shows the measurement state according to the length of articles | goods, (a) is the measurement state by a 2nd conveyance measurement apparatus (measurement part 2), (b) is the measurement state by a 1st conveyance measurement apparatus (measurement part 1), (C) shows the weighing state by the weighing device (metering unit 3). The flowchart figure which shows the measurement operation | movement by the measurement conveyor of FIG. The front view which shows other embodiment of a weighing conveyor.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The illustrated embodiment shows a weighing conveyor including two transport weighing devices and one weighing device.
1 to 3 are schematic views of a weighing conveyor according to the present invention, and conveying means 1a for conveying an article W.
And a first transport weighing device 1 having a weighing means 1b for weighing the article W, a second conveyance weighing device 2 having a conveying means 2a for conveying the article W and a weighing means 2b for weighing the article W. When,
The first transport weighing device and the third weighing device 3 provided with only weighing means 3b for mounting and holding the second transport weighing device.
The first conveyance weighing device and the second conveyance weighing device are configured by adding a length difference (1a> 2a) to the length of the conveyance means 1a, 2a, and the first conveyance weighing device 1 and the second conveyance weighing device 2 are connected to each other. In addition, they are arranged in series and adjacent so that the conveying direction is a straight line and can be continuously conveyed. As for the order of arrangement, the first conveyance weighing device 1 having a long machine length is arranged on the front side along the conveyance direction, and the second conveyance weighing device 2 is arranged ahead (front in the conveyance direction). Conveyors 7 and 7 ′ for conveying the articles W are arranged in series on the upstream side of the first transport and weighing device 1 and the downstream side of the second transport and weighing device 2.

  The third weighing device 3 includes a frame 3a having a strength that does not deform by mounting the first and second weighing and weighing devices 1 and 2, and weighing means 3b at substantially lower corners of the frame. Is arranged. The weighing device 3 has the weighing means 3b placed on a base whose upper surface is kept horizontal, and all of the weighing means 3b conveyed and placed on the first conveyance weighing device 1 and the second conveyance weighing device 2. It is a weighing device on the base side configured to be able to weigh the total weight of the article W.

  The conveying means 1a of the first conveying and weighing apparatus 1 and the conveying means 2a of the second conveying and weighing apparatus 2 are constituted by belt conveyors, the lower corners of each frame of the conveying means 1a and 2a, and the third weighing apparatus. The weighing means 1b, 2b of the respective transfer weighing devices 1, 2 are arranged between the upper surface of the three frames. Thus, the weight of the article transported and placed on the transport means 1a of the first transport and weighing apparatus 1 is the weighing means 1b, and the weight of the article transported and placed on the transport means 2a of the second transport and weighing apparatus 2 is the weighing means. In 2b, each is weighed.

  The weighing means 1b, 2b, 3b provided in the first transfer weighing device 1, the second transfer weighing device 2, and the third weighing device 3 are load cells (a strain gauge is used as a strain generating body) that is generally employed for measurement today. It is configured using the pasted one). The load cell is installed with enhanced environmental resistance such as rust prevention, waterproofing, chemical resistance, shock resistance, vibration resistance, etc. to devise a circuit or the like to reduce temperature drift.

Moreover, between the terminal end of the 1st conveyance weighing apparatus 1 arrange | positioned in series on the said 3rd weighing apparatus, and the start end of the 2nd conveyance weighing apparatus 2, of the articles | goods W supplied to the said 1st conveyance weighing apparatus Measuring means 4 for measuring the length in the conveying direction is arranged.
Specifically, as shown in FIG. 4, a detection sensor that constitutes the measuring means 4 is provided on a gate-shaped frame 5 erected between the end of the first transport and weighing device 1 and the start of the second transport and weighing device 2. is set up.
That is, the light emitter 4a is disposed on one of the opposed surfaces of the vertical frame of the gate-shaped frame 5 and the light receiver 4b is disposed on the other surface, and the surface (belt surface) of each conveying means of the first and second conveying and weighing devices. ) It is installed in the vicinity. A number of detection sensors shown in the figure are arranged at regular intervals along the vertical ridges of the frame 5 so that the height of the article W can also be measured. Further, detection sensors 8 are arranged in parallel at regular intervals on the surface of the frame 5 facing the conveying means, and the width of the article (a detection sensor not shown in the position facing the light emitting portion of the detection sensor 8). There is a light receiving portion 8 ′, and the light emitting portion 8 and the light receiving portion 8 ′ are configured to measure the width in the direction perpendicular to the transport direction.
It is detected by the ON / OFF of this detection sensor that the article W has passed through the measuring means 4, the passing time (time from ON to OFF), the first transport and weighing device 1 that transports the article W, and the first 2 The length dimension of the article W currently conveyed can be calculated from the conveyance speeds of the conveyance means 1a and 2a of the conveyance weighing device 2 (the conveyance speeds of the conveyance means 1a and 2a are the same).

The weighing of the article W and the measurement of the length dimension of the article W by the weighing conveyor configured as described above are controlled by a control panel (console) constituted by a microcomputer or the like installed in the vicinity of the weighing conveyor.
FIG. 5 is a block diagram of the control related to the above-described weighing conveyor, and stores a CPU 10 for controlling and controlling the operation of the first transfer weighing device 1, the second transfer weighing device 2, and the third weighing device 3, and a program for performing the control. ROM 11, weighing values from weighing means 1 b to 3 b of first weighing and weighing apparatus 1, second conveying and weighing apparatus 2, and third weighing apparatus 3, output values and measured values from measuring means (detection sensor) 4, and A RAM 12 that stores scale selection information that sets the length range of articles to be weighed by each weighing unit, and a display unit 13 that displays measurement values and weights of the articles W, information about articles conveyed by the conveying means, and the like. And an input operation unit 14 that is operated at the time of maintenance of the weighing units 1b to 3b and input of preset information (such as scale selection information), and an informing unit (voice output for alerting in the event of an error or emergency) ) 15, a communication unit 16 that performs data communication with a host device (management device), an I / O interface with a connected device, a transport unit (transport unit 1 a) 18 of the first transport weighing device 1, a first The weighing unit (weighing unit 1b) 19 of the conveyance weighing device 1, the length detection unit (measurement unit 4) 20 using an optical sensor or the like that detects the length of the article W in the conveyance direction, and the conveyance of the second conveyance weighing device 2. Unit (conveying means 2 a) 21, measuring part (measuring means 2 b) 22 of the second conveying and weighing apparatus 2, measuring part (measuring means 3 b) 23 of the third measuring apparatus 3, and the like. The weighing units 19, 22, and 23 include A / D converters.
The notification means 15 may be equipped with a red rotating lamp or the like in addition to the audio output unit. In that case, a rotating lamp or the like may be attached to the frame 5 equipped with the measuring means 4.

FIG. 6 shows an outline of the article data stored in the upper management apparatus, and is composed of items such as an article code for identifying the article, a JAN code, an article name, a unit, and a storage shelf number.
FIG. 7 shows an outline of the shipping destination data stored in the host management device, and includes a shipping destination number, a shipping destination name, a delivery route, a collection destination, a postal code of the shipping destination, an address, a telephone number, etc. It consists of items.
FIG. 8 similarly shows an outline of the shipping work data stored in the host management device, and includes a shipping ID, a shipping ID branch number, a shipping destination number, a shipping destination name, a delivery date, an article code, a JAN code, an article name, and the number of shipments. And the number of achievements and completion flags. The shipping ID and shipping ID branch number of the shipping work data are transmitted to the weighing conveyor and stored in the work area of the RAM 12.
FIG. 9 shows an outline of the scale selection information set and stored in the RAM 12, and the scale number (1: second transport weighing device, 2: first transport weighing device, 3: third weighing device), weighing area 1 (lower limit) Value), measurement area 2 (upper limit value), determination based on the measurement areas 1 and 2 (hereinafter, within, above), and the like.
FIG. 10 shows the measured values of the respective weighing means stored in the work memory of the RAM 12, and the figure shows the measured values when a 50 kg article having a length of 1051 mm or more is continuously conveyed and weighed. In this case, the values of time 2, 4, and 6 of scale number 3 are adopted as the weights of articles 1, 2, and 3.

Next, the operation of weighing the conveyed article by the weighing conveyor and measuring the length of the article will be described based on the flowchart of FIG.
S101: It is determined whether or not to end the program. "End" displayed on the display
Alternatively, it is determined whether or not an “end” button provided in the input operation unit has been pressed. Pressed
If yes (YES), go to the end, otherwise (NO) go to S102.
S102 ... It is determined whether or not the work is started. Specifically, “Start” displayed on the display,
Alternatively, it is determined whether or not a “start” button provided in the input operation unit has been pressed. Pressed
If yes (YES), the process proceeds to S103, otherwise (NO) returns to S101.
S103: Start the transport means 1a of the first transport and weighing device 1 and the transport means 2a of the second transport and weighing device 2.
Move.
S104: It is determined whether or not there is currently an error state. Specifically, the first transport weighing device 1
, Each of the weighing means of the second transport weighing device 2 and the third weighing device 3 is in a state where the weighing is impossible,
When the feeding means is abnormal and the article cannot be conveyed, the measuring means (detection sensor) 4
Determining whether there is a detected error, such as when there is always. If there is an abnormality (YE
S) displays the details of the abnormality on the display unit and proceeds to S105. If there is no abnormality (NO
) Proceeds to S106.

S105 ... "Release" displayed on the display unit or "Release" button provided on the input operation unit
It is determined whether or not the button is pressed. If “Cancel” is pressed, the process returns to S103.
.
In the case of an error due to a physical cause, no countermeasure (action) has been taken by the operator.
In this case, the “release” button may not be pressed.
S106: It is determined whether or not a shipping ID has been received from the upper management apparatus. Receiving
If yes (YES), go to S107; if not received (NO), go to S108
.
If not received, the shipment work data stored in the higher-level management device (see FIG. 8)
) Is all or no data is received, no shipment data is received.
The virtual shipping ID is automatically created in the work area of the RAM 12 by serial number, and the shipment
The ID is set as the shipping ID of the current article, and the process proceeds to S108. Shipment ID is
Used for associating an article to be weighed with a weighed weight. Upper pipe
On the physical device side, a shipping ID that makes each shipping instruction data unique is unique.
Number (may be an incremented number from a certain starting point). Upper pipe
When not numbered by the physical device, the CPU 10 of the control board of the weighing conveyor is RAM1
A shipping ID is assigned to each article to be transported and weighed to work area 2.
S107: Inquires the shipping management data to the host management apparatus, and the received shipping ID is stored in the RAM 12.
Are stored in the work area and the process proceeds to S108.

S108: Detection sensor for detecting in (IN) and out (OUT) of articles conveyed by the conveying means.
Whether or not the article has been conveyed is determined by the measuring device 4. Photo set
When measuring the length of an article with one sensor, it is turned ON / O at regular intervals by an optical sensor.
FF is detected. The interval of the time to detect is a conveyance means (belt conveyor).
It changes according to the conveyance speed. Conveying means (belt conveyor)
The conveyance speed is set in the maintenance mode and is set in the condition setting area of the RAM 12.
Remembered.
If the sensor is ON (NO), it is determined that the article W has not been conveyed, and S10
Returning to step 6, if the sensor is OFF (YES), it is determined that the article W has been conveyed.
The process proceeds to S109. A single photo sensor may be used, but two or more photo sensors may be used.
The length of the article W is detected by using each photo sensor to detect ON / OFF at regular intervals.
May be measured.
The detection is as follows: bright = ON (the sensor is not obstructed by the article), dark =
OFF (sensor is blocked by article)
In addition, the determination of the output signal may be changed as appropriate.
S109: Depending on the ON / OFF measurement of the sensor and the conveyance speed of the conveyance means,
The length is calculated.
In addition to the method of calculating the length of an article by the above calculation, the article inspection is performed at both ends of the transport weighing device.
An output sensor is provided, and the ON / OFF output signal output by the article detection sensor
A method of selecting a weighing device according to a combination or order, or simply an object
Weighing equipment depends on whether the product protrudes from the front and rear ends in the transport direction of the transport weighing device.
The number of the weighing device to be selected may be determined by the method of selecting the device.
.
S110: Each of the weighing means 1b to 3b (the weighing units 19, 22, and 23) measures the weight of the article W.
The measured value is stored in the work memory.

S111: The measured value of the conveyed article W is the measured value of the article W measured by the detection sensor (measurement means) 4.
Measuring means 3b for measuring a heavy load based on the length, measuring means for measuring a medium load
1b, R which memorize | stores the measured value from the measuring means 2b which measures a small load each continuously
A selection is made from among the AMs 12.
The selection is determined by the detection time of the article by the detection sensor and the conveyance speed of the conveyance means.
When the length of the article W calculated from the above is 440 mm or less, it is stored in the RAM 12.
Second weighing machine 2 for weighing a small load based on the selected scale selection information (see FIG. 9)
The measured value from the weighing means 2b (balance number: 1) is read and the process proceeds to S112. Article
If the length of W is not less than 441 mm and not more than 1050 mm, it is recorded in the RAM 12 in the same manner.
The first transport weighing device that measures the medium load based on the memorized scale selection information (see FIG. 9)
The measured value from the weighing means 1b (balance number: 2) of the device 1 is read and the process proceeds to S113.
When the length of the article W is 1051 mm or more, the scale stored in the RAM 12 is similarly used.
Measuring means of the third measuring device 3 for measuring a large load based on the selection information (see FIG. 9)
The measurement value from 3b (balance number: 3) is read, and the process proceeds to S114.
In the case of the method of determining the number of the scale device in S109, the scale device determined in S109
Branch according to the number.

S112 ... Since the article W1 having a length that fits within the captain of the second transport and weighing device 2 has been transported,
The weight is calculated based on the measured value of the means 2b (balance number: 1), and the process proceeds to S115 (FIG.
11 (a)).
The detection of the weight for each of a plurality of articles conveyed continuously detects the length.
(Measuring means) 4 transit time (time from ON to OFF) and conveying means 1a,
2a and the weighing means 2b (balance number) continuously stored in the RAM 12.
No. 1) Because it can be cut out for each period fluctuation of the article unit by the measured value of 1)
For each measured value, the weight of each article is a well-known and commonly used technique such as moving average
The weight of articles continuously conveyed is calculated in order and determined.
If there is an abnormality during measurement and weighing, or the calculated weight of the article indicates an abnormality.
If the value is equal to the threshold value, the fact that an abnormality has occurred and the cause thereof are
Stored in the test area.

S113: Length that is longer than the length of the second transfer weighing device 2 and fits within the length of the first transfer weighing device 1
Since the article W2 is conveyed, based on the measurement value of the weighing means 1b (balance number: 2)
The weight is calculated and the process proceeds to S115 (see FIG. 11B).
As described above, the weight is determined for each of the plurality of articles that are continuously conveyed.
Passing time (time from ON to OFF) at the detection sensor (measurement means) 4 and conveyance
The conveying speed of the means 1a, 2a and the weighing means stored continuously in the RAM 12
It is possible to cut out every period fluctuation of the article unit by the measurement value of 1b (balance number: 2)
Because it is possible, the weight of each article for each measured value cut out is a well-known and conventional technique
The weights of articles continuously conveyed are calculated in order by moving averages and the like are sequentially determined.
In addition, when there is an abnormality during measurement and weighing, or the weight of the calculated article indicates an abnormality
If it is a value, the fact that an abnormality has occurred and the cause thereof are
Remember to area.

S114 ... Since the article W3 longer than the captain of the first transport and weighing device 1 has been transported, the weighing means 3 (
The weight is calculated based on the measured value of the scale number: 3), and the process proceeds to S115 (FIG. 11 (c)).
reference).
As described above, the weight is determined for each of the plurality of articles that are continuously conveyed.
Passing time (time from ON to OFF) at the detection sensor (measurement means) 4 and conveyance
The conveying speed of the means 1a, 2a and the weighing means stored continuously in the RAM 12
It is possible to cut out every period fluctuation of the article unit by the measured value of 3b (balance number: 3)
Because it is possible, the weight of each article for each measured value cut out is a well-known and conventional technique
The weights of articles continuously conveyed are calculated in order by moving averages and the like are sequentially determined.
In addition, when there is an abnormality during measurement and weighing, or the weight of the calculated article indicates an abnormality
If it is a value, the fact that an abnormality has occurred and the cause thereof are
Remember to area.

S115: At the time of measurement, at the time of weighing, at the time of conveyance, at the time of weight calculation, and whether or not there was an abnormality in various sensors
Are determined based on the information stored in the work area of the RAM 12. D
If it is determined that the error has occurred (YES), the process proceeds to S116. If there is no error (NO),
Proceed to S118.
S116: The error content is displayed on the display unit 13. Or turn on (flash) the patrol light
.
S117: Stop the transfer means 1a of the first transfer weighing device 1 and the transfer means 2a of the second transfer weighing device 2.
Stop and return to S104.
S118: Calculated to the screen of the control panel (console) on which measurement and weighing data are displayed.
The weight of the selected item is displayed. (The displayed weight corresponds to the order of goods transport and
The length, weight, etc. to be displayed are displayed at any time in a two-dimensional table showing the item name and the corresponding value.
Do. )
The display of the weighing data is the value that the currently transported item is weighed and fluctuates.
Is displayed as needed, and when the weight is calculated and confirmed, the confirmed weight is fixedly displayed.
The
S119: The result is stored as a record. When stored in the record storage area of the RAM 12,
To the upper management device. In case of always sending to the upper management device
, It may not be stored in the result storage area of the RAM 12.
S120: It is determined whether or not the shipping operation is completed or whether or not the shipping operation is interrupted. work
If completed or interrupted (YES), return to S101, and work is not completed
(NO) returns to S104.
Whether or not to end the shipment operation of the article is displayed on the display unit 13 as “complete / medium”
”” Or whether the “Complete / Suspend” button provided on the input operation unit has been pressed.
Alternatively, the determination is made as to whether or not “completion / interruption” has been received from the upper management apparatus. "
When the “Complete / Suspend” button is pressed or the “Complete / Suspend” data is
If received from the device, the process returns to S101, otherwise the process returns to S104.

In the illustrated weighing conveyor, the first conveying and weighing device 1 for weighing a medium load and the second conveying and weighing device 2 for weighing a small load are connected in series and adjacent to each other, in which the conveying means and the weighing means (metering unit) are integrated. A first transport and weighing device 1 that measures the medium load, and has a structure that is stacked on a weighing device 3 that measures only a large load that does not include the conveying unit and includes only a weighing unit. The measured values from the second transport weighing device 2 for weighing the load and the weighing device 3 for weighing the heavy load are stored in the RAM 12 successively.
Further, a sensor (measuring means) for measuring the length of the transported article (the length in the transport direction) is provided between the first transport and weighing device 1 and the second transport and weighing device 2, and the sensor is turned on and off. It detects that the article has passed, and calculates the length of the currently conveyed article based on the passage time (time from ON to OFF) and the conveyance speed of the conveyance means.
The weighing value of the conveyed article is a weighing means 1b, 2b, 3b (weighing units 1, 2, 3) for weighing the medium load, the small load, and the large load based on the length of the article measured and calculated by the sensor. ) From the RAM 12 in which the measured values from each are continuously stored.

  In the selection and determination, when the calculated article length is equal to or less than the machine length dimension of the second transport and weighing device 2 (440 mm or less in the embodiment), the second transport and weighing device 2 that measures the small load stored in the RAM 12 is used. The measurement value of the weighing means 2b (the weighing unit 2) is adopted. When the calculated length of the article is not less than the machine length dimension of the second transfer weighing apparatus and not more than the machine length dimension of the first transfer weighing apparatus 1 (from 441 mm to 1050 mm in the embodiment), the medium load stored in the RAM 12 is used. The measured value of the weighing means 1b (the weighing unit 1) of the first transport weighing device 1 to be measured is adopted. If the calculated length of the article is equal to or larger than the machine length of the first transport and weighing device 1 (1051 mm or more in the embodiment), the weighing means 3b (weighing) of the weighing device 3 that measures a large load stored in the RAM 12 is used. The measurement value of part 3) is adopted. Then, the measured value read from the RAM 12 is obtained by a moving average or the like, which is a well-known and commonly used technique, sequentially displayed on the display unit, and transmitted to the upper management device using a connection interface with an external device.

The weight of each article conveyed continuously is determined by the measurement time continuously stored in the RAM 12 and the passage time (time from ON to OFF) of the sensor for detecting the length of the article, the conveying speed of the conveying means. Therefore, the weight of each article can be calculated for each of the cut measurement values, and the weight of the articles to be continuously conveyed can be sequentially determined.
By using the above method, even if the article is transported obliquely, the measuring means (measuring unit) is selected based on the transport length of the actually transported article, and the measured value of the selected single weighing means Since the weight is determined, it is possible to easily determine on which transport weighing device the article is currently placed and transported, or whether the article is placed and transported across the two transport weighing devices. .
Accordingly, the weight of the article can be determined based on the measurement value from each independent weighing means (measuring unit), so that the correct weight of the article to be conveyed can be displayed or output.

  FIG. 13 shows a second measuring apparatus 3 having a first conveying apparatus 1 ′ having only a conveying means 1a, a conveying means 2a and a weighing means 2b on a third weighing apparatus 3 having only a weighing means 3b. 1 shows a weighing conveyor in which one conveyance weighing device 2 is arranged in series and stacked, and is conveyed by the conveying means 2a included in the first conveyance device 1 ′ and the second conveyance weighing device 2 as in the first embodiment. Measuring means 4 for measuring the length of the article to be measured is arranged between the first transport device 1 ′ and the second transport weighing device 2. That is, the only difference from the weighing conveyor of the first embodiment is that the first transfer device 1 'is not equipped with weighing means.

  Further, the machine lengths of the first transfer device 1 ′ and the second transfer weighing device 2 are formed so that the machine length of the first transfer device 1 ′ is longer than the machine length of the second transfer weighing device 2 as in the first embodiment. The same members as those shown in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

When the article W is conveyed by the weighing conveyor having the above-described configuration, if the length dimension of the article W to be conveyed is a dimension that can be accommodated within the captain of the second conveyance weighing apparatus 2, the measurement by the weighing means 2b of the second conveyance weighing apparatus 2 is performed. A value is selected. Further, when the length of the article W to be conveyed is longer than the length of the second transport weighing device 2 and fits within the length of the first transport device 1 ′, and from the length of the first transport device 1 ′. In the case of a long dimension, the measured value of the weighing means 3b of the third weighing device 3 is selected.
That is, in relation to the flowchart of FIG. 12 showing the measurement operation of the first embodiment, when the length of the article W is determined to be “medium” and “large” in the scale selection in S111, the process proceeds to S114. The weight is calculated based on the measured value of the measuring means 3.
In addition, in a state in which a plurality of articles having different lengths are sequentially conveyed, and the articles are placed and conveyed within the captain of each conveyance device of the first conveyance device 1 ′ and the second conveyance weighing device 2, The weight of the article on the first transport device 1 ′ can be calculated by subtracting the weighing data of the second transport weighing device 2 from the weighing data of the third weighing device 3.

As described above, even if the article W to be transported is placed so as to straddle the first transport device 1 ′ and the second transport weighing device 2, stress may affect the weighing means of the third weighing device 3. Since there is no, the correct measurement value can be measured. In addition, since the number of weighing means (load cells) can be reduced, it can be manufactured at low cost.
Therefore, it is possible to provide a weighing conveyor that can improve the time measurement efficiency and the weighing capacity with a small number of weighing means.

The present invention is not limited to the embodiments shown in the drawings, and can be appropriately changed without departing from the scope of the present invention.
(1) In the embodiment, a load cell in which a strain gauge is attached to a strain generating body is used as a measuring means (measuring unit). However, as a servo system, a balanced electromagnetic force type, a metal tuning fork vibration type, a string vibration type Alternatively, a capacitance type, piezoelectric type, magnetostrictive type, gyro type, or hydraulic type load meter may be used.
(2) In the embodiment, an optical sensor is used as a measuring means for measuring the length of the article, and the length of the article is calculated from the detection time (time from ON to OFF) by the optical sensor and the conveying speed of the conveying means. However, the present invention is not limited to this, and any method such as a method of arranging and measuring a plurality of optical sensors along the conveyance path may be used.
(3) In the embodiment, the number of serially arranged transport weighing devices stacked on the weighing device is two, but the number of transport weighing devices stacked and mounted is not limited to two, and may be three or more. .
(4) The table such as the scale selection information in FIG. 9 is not limited to being stored in the storage means, and this data may be included in the program.

DESCRIPTION OF SYMBOLS 1 ... 1st conveyance weighing apparatus 1 '... 1st conveyance apparatus
2 ... 2nd conveyance measuring device 1a, 2a ... Conveying means 1b, 2b ... Measuring means 3 ... Measuring device 3b ... Measuring means 4 ... Measuring means (detection sensor)
W ... Goods

Claims (8)

A weighing conveyor comprising conveying means for conveying an article, and weighing means for weighing the article while conveying the article by the conveying means,
A plurality of transport weighing devices provided with the transport means and the weighing means are arranged in series and adjacent on the base-side weighing device so that the transport direction is in a straight line and can be continuously transported,
Furthermore, measuring means for measuring the length of the article conveyed by the conveying means provided in the conveyance weighing device,
According to the length of the article measured by the measuring means, a selection means for selecting the measurement values output from the plurality of transport weighing devices and the base-side weighing device,
A weighing conveyor characterized by comprising: If any abnormality occurs in the conveying means, the weighing means, and the measuring means, a notification means for notifying that the abnormality has occurred and its details;
A stopping means for stopping the conveying means of the conveying and weighing device when an abnormality is notified by the notifying means;
The weighing conveyor according to claim 1, further comprising: The weighing conveyor according to claim 1 or 2 , wherein the number of the transport weighing devices is two, and the measuring means is disposed between the two transport weighing devices . A weighing conveyor comprising conveying means for conveying an article, and weighing means for weighing the article while conveying the article by the conveying means,
A transport device that includes the transport unit and does not include the metering unit, and a transport metering device that includes the transport unit and the metering unit, can be transported continuously on a base-side metering device with a transport direction in a straight line. Arranged in series and adjacent to each other,
Furthermore, measuring means for measuring the length of an article conveyed by the conveying means provided in the conveying apparatus and the conveying and weighing apparatus,
According to the length of the article measured by the measuring means, a selection means for selecting the measured value output from the transport weighing device, the base-side weighing device,
Weighing conveyor you comprising the. If any abnormality occurs in the conveying means, the weighing means, and the measuring means, a notification means for notifying that the abnormality has occurred and its details;
A stopping means for stopping the conveying means of the conveying device and the conveying and weighing apparatus when an abnormality is notified by the notifying means ;
The weighing conveyor according to claim 4, further comprising: 6. The weighing conveyor according to claim 4 , wherein the number of the transfer device and the transfer weighing device is one , and the measuring means is disposed between the transfer device and the transfer weighing device. The said weighing conveyor is provided with the display means which displays the measured value selected by the said selection means, and the measured value measured by the said measuring means, The any one of Claim 1 thru | or 6 characterized by the above-mentioned. Weighing conveyor. The weighing conveyor according to claim 7, further comprising a communication unit that transmits display content displayed on the display unit to a higher-level management device.

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