JPH0695042B2 - Automatic weighing machine - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an automatic weighing and pricing machine.

Technical background of the invention and its problems In recent years, along with the development of the distribution industry, there is a growing demand for an automatic weighing and pricing system, that is, a system for packaging and packing goods to perform weighing and pricing. Is required to improve.

Generally, in an automatic weighing and pricing machine, the goods carried in from the packaging machine are weighed by the weighing section on the weighing conveyor, and after weighing, the articles are sent from the weighing conveyor to the transfer conveyor and transported to the sticking conveyor, where the sticking is performed. Labels are attached to the goods on the conveyor.

However, in such an apparatus, a piece of meat due to a pack leak, a piece of film due to a packing mistake, etc. tend to remain on the conveyor, and if this is on a weighing conveyor, a measurement error of the product occurs, and either Even with a conveyor, it hinders the smooth transportation of the product.

OBJECT OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to obtain an automatic weighing and pricing machine capable of eliminating the harmful effects of foreign matter left on a conveyor and ensuring the smooth transfer of goods. And

SUMMARY OF THE INVENTION The present invention, by rotating all of the conveyors at idle when the power is turned on or when the apparatus is switched from stop to operation,
It is configured so that even if foreign matter remains, it can be cleaned and the goods can be conveyed well.

Embodiments of the Invention One embodiment of the present invention will be described with reference to the drawings. First, the first
The figure schematically shows the external appearance, and basically, the automatic packaging machine 1 and the automatic weighing and pricing machine 2 are integrated. As a result, first, the product set on the packaging conveyor 3 by the automatic packaging machine 1 is conveyed in the packaging machine, and the packaging film cut to a predetermined length is sent on the product on the way.
The goods are raised to the film and the packing is done. Then, according to the packaging conveyor 3, the automatic weighing and pricing machine 2 is moved to. First, a weighing conveyor 4 is arranged in front of the packaging conveyor 3, and the items transferred onto the weighing conveyor 4 are weighed. When the weighing is finished, the weighing arm 5 pushes the article laterally, and the article is transferred onto the conveyor 6. The conveyor 6 conveys the goods along the conveyor guide 7 onto the sticking conveyor 8.
The label issued by the label printer 9 is attached to the item sent onto the attaching conveyor 8 by the operation of the attaching arm 10. Then, the article is sent out by the ejection arm 11 and ejected to the front side by the ejection rollers 12 and 13. In FIG. 2, the thick arrow indicates the conveying direction of the conveyor, and the thin arrow indicates the flow of goods.

Reference numeral 14 is an operation section of the automatic packaging machine 1, and 15 is an operation section of the automatic weighing and pricing machine 2. The structure of the operation unit 15 is shown in FIG. 3, namely, the display unit 16 for displaying the weight, unit price, price, and product number, the ten-key pad 17 for 0 to 1, the erase key 18, the execution key 19,
In addition to various keys 20 such as part numbers, key switches 21 and 22, operation switch 23 for operating / stopping, business switching switch 24 for switching packaging weighing value mode / weighing value mode / packaging mode, and power switch 25 are provided. There is. Further, various keys such as the sheet key 26 are provided. 28 is an LE that displays an error
It is D.

These systems are controlled by a system controller as shown in FIG. First, the ROM / ROM 32 and the RAM 33 are connected to the CPU 30 via the latch 31, and selected by the memory selector 34. On the other hand, I / O to CPU30
Ports 35, 36 and 37 are selectively connected by the I / O selector 38, the scale / printer 40 is connected to the I / O port 35 via the photo coupler 39, and the I / O port 37 is connected via the photo coupler 41. Is connected to the automatic packaging machine 1. 42 is the bus Transieba. An interrupt controller 44 is connected to the CPU 30 via a bus transceiver 43. Outputs of the timer 1 45, the timer 2 46, etc. are input to the interrupt controller 44. And the conveyor 4,
AC motor control circuits 48 and 49 are connected to the AC motor 47 for 6, 8 and the like. A pulse motor control circuit 51 is connected to the pulse motor 50 for the sticking arm 10. A solenoid valve drive circuit 53 is connected to the solenoid valve 52.
Further, a plurality of photosensors 54 formed by combining LEDs and phototransistors are provided at the entrances of various conveyors and the like. That is, it operates under the LED drive circuit 55, the photoelectric detection circuit 56 is connected to the output side, and is input to the I / O port 36 via the data selector 57.
Further, a part thereof is input to the interrupt controller 44. Further, inputs of various switches 57 and display switches 59 are also given to the data selector 57.

In such a configuration, FIG. 5 is a flow chart showing the initial discharging operation when the power switch is turned on and stopped and the operation is switched to the operation. First, under the ejection flag = 1, if the ejection arm 11 is not in the home position, the ejection arm 11
Is driven in reverse and returned to the home position. If it is at home position, it is stopped. A photo sensor (54b) for detecting an article is provided at the entrance of the pasting conveyor 8, but if the photo sensor is not ON, the conveyor conveyor 6 and the pasting conveyor 8 are normally rotated by the idle rotation means. It is possible to transfer the above to the pasting conveyor 8.
On the other hand, when the goods are transferred onto the sticking conveyor 8 and the entrance photo sensor is turned on, the conveying conveyor 6 and the sticking conveyor 8 are stopped to carry out label sticking, and the discharging arm 11 is normally driven to discharge the goods. Then, the timer 1 process is performed. Here, the timer 1 processing means the discharge arm 11
Refers to the processing of the time required from home position to the completion of product discharge. After the processing of the timer 1, the discharging arm 11 is stopped, returns to the home position by the reverse driving, and stops when it returns. Next, the transfer conveyor 6 and the pasting conveyor 8
The normal rotation of is performed. The forward rotation of the conveyors 6 and 8 is continued and stopped until 500 ms has elapsed if the entrance sensor of the pasting conveyor 8 is OFF. On the other hand, if there is a product and the photo sensor on the entrance of the pasting conveyor is ON, both the conveyors 6 and 8 stop until the product disappears and 500 ms elapses. Then, at the same time as the above, the discharging operation of the discharging arm 11 is performed. In any case, if the discharge of the goods on the weighing conveyor 4 is completed at this time, the end is reached. On the other hand, if the discharge of the goods on the weighing conveyor 4 is not completed, the discharge flag is set to zero. If the weighing arm 5 is not in the home position, it is returned to the home position by reverse driving, and if it is in the home position, it stops as it is.
Here, the weighing conveyor 4 is rotated in the normal direction for 100 ms, and the width of the goods is adjusted. After that, the transport conveyor 6 rotates in the forward direction and the weighing arm 5 is driven in the forward direction so that the goods are transferred from the weighing conveyor 4 to the transport conveyor 6 and discharged. Here, the timer 2 refers to processing of the time required from the home position of the weighing arm 5 to the completion of discharging the product. Then, when the measuring arm 5 returns to the home position, the measuring arm 5 stops, the discharging on the measuring conveyor 4 is completed, and the transport conveyor 6 and the pasting conveyor 8 are rotated in the normal direction.

As described above, in this embodiment, immediately after the power switch 25 is turned on or when the machine is switched from the stopped state to the operating state, the discharging operation is always performed to clean the conveyor.

Advantageous Effects of the Invention Since the present invention idles all of the conveyors at the time of switching on the power source and switching the apparatus from the stop state to the operation state as described above, even if foreign matter remains on the conveyor, it can be cleaned at the time of use. Therefore, there is an effect that it is possible to satisfactorily carry out operations such as product transportation.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an external perspective view, FIG. 2 is a schematic plan view, and FIG. 3 is a front view of an operating portion.
FIG. 4 is a block diagram, and FIG. 5 is a flow chart of the initial discharging operation.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeharu Koike 6-78 Minamimachi, Mishima City, Shizuoka Prefecture Tokyo Electric Co., Ltd. Mishima Factory (72) Inventor Kuniichi Sekioka 6-78 Minamimachi, Mishima City, Shizuoka Prefecture Tokyo Electric Stock company Mishima factory

Claims (1)

[Claims] 1. A product carried in from a packaging machine is weighed by a weighing section on a weighing conveyor, and after weighing, the product is sent out from the weighing conveyor to a transfer conveyor and is transported to a sticking conveyor, and the product is placed on the sticking conveyor. In an automatic weighing and pricing machine that attaches a label to each of the conveyors, idle rotation is performed by rotating all of the above conveyors at least one revolution in order to drop foreign matter on the conveyors when the power is turned on and when the equipment is switched from operation to operation. An automatic weighing and pricing machine characterized by being provided with means.