JP2917073B2 - Operation control method between weighing machine and rotary packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging method in which a large number of packaging containers are transported at equal intervals by a conveyor, and a packaged object is filled from a measuring instrument into the transporting packaging containers. Means for controlling the operation of the conveyor according to the filling of the packaging container into the packaging container from the measuring device.

[0002]

2. Description of the Related Art As a conventional packaging means, as shown in FIG. 5, a container (3) is supported by a plurality of sets of clamps (2) radially provided on the periphery of a disk (1), and indexing means is provided. (4) The intermittent power is transmitted to the main shaft (6) by the motor (5) via the motor (5), and the containers (3) are intermittently moved one pitch at a time on a circular orbit. An electronic weighing machine (7) having a calculation function has been proposed which calculates and fills each container (3) with an object to be packaged. In this means, every time the container (3) intermittently moves by one pitch, a signal (10) emitted from a switch (9) operated by a cam (8) provided on a shaft (6) is sent to a computer (11). Input and send an operation signal (13) to the timing hopper (12) according to the input signal (10);
Since the container (3) is filled with the articles to be packaged in the timing hopper (12), the timing of the intermittent movement of the container (3) and the timing of opening the hopper (12) coincide.

[0003]

However, with the above-described means, the measuring speed of the measuring device 7 may not be able to keep up with the movement timing of the container 3 due to the following reasons. That is, the packaged object is discharged from the bucket conveyor 16 toward the apex of the umbrella-shaped body 15 on the large number of weighing hoppers 14 arranged in an annular shape. However, when the packaged object is a granular material such as dried beans, Since these particles are relatively evenly dispersed and supplied into the respective weighing hoppers 14, the weighing error between the respective weighing hoppers is small, and the computer quickly sets the discharge amount by combining the respective weighing hoppers. If the material to be packaged is viscous, such as boiled beans, the dispersion to each of the weighing hoppers 14 becomes extremely non-uniform, causing a calculation delay in combining the respective weighing hoppers, and the timing of the packaged material from the weighing hopper 14 Since the falling time to the hopper 12 is prolonged, the supply interval of the packaged articles does not match in the intermittent movement of the container 3 after all. Therefore, conventionally, the intermittent movement of each container 3 by the conveyor has to be delayed as a whole, and there is a disadvantage that efficient operation cannot be performed.

[0004]

A first object of the present invention is to reduce the time loss of the entire packaging means by operating a conveyor in response to a signal indicating completion of weighing of an object to be packaged by a weighing device. As shown in FIG. 1, weight data input from each of a large number of weighing hoppers installed in the upper stage are compared and calculated by a first control device, and a shutter is temporarily opened for the weighing hopper combined by the calculation. After transmitting an opening command signal and temporarily storing the articles to be discharged from the weighing hopper in the lower timing hopper, the first
A weighing machine configured to open the shutter of the timing hopper according to a filling command signal from a control device, and a conveyor driven by a motor driven by a command from the second control device. A rotary wrapping machine that intermittently moves by one pitch at a time below the timing hopper in the weighing machine, wherein the rotary wrapping machine is moved from the rotary wrapping machine in response to the rotation of the rotating conveyor being stopped. 1 Send a ready signal to the controller,
In response to the preparation completion signal and the opening command signal, the first control device sends the filling command signal to the timing hopper, and sends a filling completion signal to the second control device almost synchronously. In response, the second controller sends an operating signal to the motor, while the timer of either of the two controllers determines the minimum stop time of the conveyor that cannot be further reduced and the subsequent constant rotation time of the conveyor. In addition to the setting, the minimum stop time is extended by a fixed time, and the apparatus waits for the filling completion signal to be sent to the second control device during the extended time.

[0005]

[0006]

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electronic weighing machine (20) shown in FIG. 1 has a large number of weighing hoppers (21) installed in an annular shape on an upper stage, and a single weighing hopper (22) provided under a large-diameter collecting chute (22). And a timing hopper (23) for lifting the packaged object (25) lifted from below by the bucket conveyor (24).
When discharged to the top of 6), the wrapped object is dispersed in all directions by the umbrella (26) and flows into each weighing hopper (21).
Since each of the weighing hoppers (21) is supported by the body via a load cell (27), the weight of the packaged object flowing into each of the weighing hoppers (21) is converted as a frequency distortion of the load cell (27). After that, it is input to the first control device (29) as weight data (28). When the input data reaches the set weight previously input to the first control device (29), the supply of the packages to the respective weighing hoppers (21) is adjusted, and the weighing combined by the first control device is performed. By sending the opening command signal (30) to the hopper (21) and opening the shutter (21a), the packages are collected by the collecting chute (22) and temporarily stored in the lower timing hopper (23). You. After that, by sending a filling command signal (31) from the first control device (29) and opening the shutter (32), the article to be packaged is discharged downward.

On the other hand, the rotary packaging machine (40) vertically supports a main shaft (43) on a bearing (42) provided on a machine base (41), and has a peripheral edge of a disk (44) at the upper end of the main shaft. A large number of sets of clamps (45) are provided as in 2, and the lower end of the main shaft (43) is connected to a servomotor (48) via a plurality of sets of gears (46) (47) to form a conveyor (50). doing. Therefore, while receiving the signal from the encoder (51) operated by the rotational power of the motor (48) by the second control device (52), the second control device (52) transmits a control signal ( 53) through the screwdriver (54) to clamp (45)
A large number of bags, that is, packaging containers (55) supported intermittently move one pitch at a time, and stop under the timing hopper (23) for a certain period of time. In the conveyor, supply (56) of the empty container (55) to the clamp (45) being stopped as shown in FIG. 2 or sealing of the opening of the container (55) (5).
7) There is a minimum stop time (60) that cannot be further reduced as shown in FIG. 3 and FIG.
A timer (59) provided in the control device (52) sets this minimum stop time. In addition, the timer (59) usually sets a constant rotation time (61) so as to keep an appropriate speed so that the rotation of the conveyor (50) is not excessive.

In FIG. 1, a switch (6) for detecting the position by the encoder (51) or touching the container (55) is used.
When the container (55) is detected to move below the timing hopper (23) in 2) or the like, a ready signal (63) is sent to the first control device (29) first. . If the preparation completion signal (63) and the opening command signal (30) have been transmitted before that, the above-mentioned filling command signal (3
1) is sent to the container (55) from the timing hopper (23), and the filling completion signal (6
4) is sent from the first control device to the second control device,
The signal (64) causes the motor (48) to drive the conveyor (50), and the container (55) moves by one pitch at a speed as shown by the solid line (65) in FIG. However, when the opening command signal (30) is not transmitted before the preparation completion signal (63) is transmitted, the transmission of the filling command signal (31) is stopped. That is, in FIG. 3, a fixed extension time (66) is formed, and when the opening command signal (30) is sent during the extension time (66), the filling command signal (31) and the filling completion signal (64) are changed. The container is fed, and the container is moved by the conveyor in a state of keeping the delayed time (65a). However, if the meter is not ready during the extension time (66), the filling completion signal (64) is sent at the same time as the extension time is exceeded, and one container for rotating the conveyor is idle-fed.

In the case where the time required for the packages to be discharged from the weighing hopper 21 into the chute 22 to reach the timing hopper 23 varies due to, for example, viscosity, the timing hopper 23 is provided with a weight measuring sensor 70 formed by a load cell. It is confirmed that the set amount of the article to be packaged has been supplied to the timing hopper 23. That is, when the set amount of the packaged product is supplied to the timing hopper 23, the confirmation signal 71 is fed back to the timing hopper 23 via the first control device 29 to release the shirt 32, and at the same time, the filling completion signal 64 is transmitted to the timing hopper 23. 2 control device 5
2 and an instruction signal 5 for starting the motor 48
Send 3 out. In this case, the instruction signal 5 for starting the motor
3 exceeds a predetermined stop time of the conveyor 50, the transmission of the operation signal to the motor is delayed 65a within the limit of the assumed extended time 66 of FIG. 3, and the operation cycle of the motor is advanced by the delay. I do.

As another method, as shown in FIG. 4, a minimum stop time (60) and a fixed rotation time (61) of the packaging container are set, and the stop time is extended by a certain time. When the conveyor is ready to start within the range of (66), the motor (48) is set so that the container finishes moving within the fixed rotation time (61) rather than the normal operation speed (65).
Changes the speed to increase the moving speed (72) of the container.

[0012]

According to the first aspect of the present invention, a fixed limited extension time is set within an intermittent stop time of a conveyor that repeats an intermittent operation by driving a motor, and transmission to the motor caused by a metering delay is performed based on the assumption. It is possible to delay within the limit of the extension time, and the intermittent operation cycle of the motor is relatively advanced by the delay, and there is a reduction in the efficiency of time accumulation by the measurement delay, but as in the conventional example, The time loss is smaller than the expected setting of the conveyor stop time with respect to the weighing time. In particular, according to the second aspect of the present invention, since the metering delay is accelerated by the conveyor to recover the delay, the efficiency is greatly improved.

[0013]

[0014]

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a plan view of the packaging machine.

FIG. 3 is a graph for explaining the operation.

FIG. 4 is a graph for explaining the operation.

FIG. 5 is an explanatory view of a conventional example.

[Explanation of symbols]

(20) weighing machine (21) weighing hopper (23) timing hopper (28) weight data (29) first controller (30)
… Opening command signal (31)… Filling command signal (40)… Rotary packaging machine (4
8) Servo motor (50) Conveyor (52) Second controller (53)
Control signal (55)… Packing container (59)… Timer (60)… Minimum stop time (61)… Constant rotation time (63)… Ready signal (6
4) Filling complete signal (66) Standby time (70) Sensor (71) Confirmation signal

Claims (2)

(57) [Claims] 1. A first control device compares and calculates weight data input from each of a large number of weighing hoppers installed in an upper stage, and temporarily opens a shutter for the number of weighing hoppers selected by the calculation. The opening command signal is transmitted as described above, and the articles discharged from the weighing hopper are collectively stored in the lower timing hopper, and then the timing hopper is shut down by the filling command signal from the first control device. And a conveyor driven by a motor driven by a command from the second control device, and a number of packaging containers are conveyed by the conveyor.
A rotary wrapping machine that intermittently moves by one pitch at a time below the timing hopper in the weighing device, wherein the rotation rotator stops rotating and the
It sends a ready signal to the first controller from the second control unit, originating in response to said opening command signal and the ready signal
The first control device transmits a filling completion signal to the second control device almost synchronously with the filling command signal to the timing hopper, and the second control device sends the filling completion signal every time the filling completion signal is transmitted. In the means for transmitting the intermittent operation signal to the motor, a fixed limited assumed extension time is set for the stop time of the conveyor, and the first control device is controlled by the timing hopper .
Feeding through the same timing hopper
Transmission of an operation signal to the motor resulting from a delay of the filling completion signal sent to the second control device substantially in synchronization with the command signal
Can be delayed within the limits of the above assumed extended time,
The intermittent operation cycle of the data
Operation control method that. 2. A first control device compares and calculates weight data input from each of a plurality of weighing hoppers installed in an upper stage, and temporarily opens a shutter to the number of weighing hoppers selected by the calculation. The opening command signal is transmitted as described above, and the articles discharged from the weighing hopper are collectively stored in the lower timing hopper, and then the timing hopper is closed by the filling command signal from the first control device. And a conveyor driven by a motor driven by a command from the second control device, and a number of packaging containers are conveyed by the conveyor.
A rotary wrapping machine that intermittently moves by one pitch at a time below the timing hopper in the weighing device; A preparation completion signal is sent to the control device, and a filling completion signal is sent from the first control device to the second control device almost synchronously with a filling command signal to the timing hopper which is issued in response to the preparation completion signal and the opening command signal. In the means for transmitting the intermittent operation signal from the second control device to the motor every time this filling completion signal is transmitted, a limited limited assumed extension time is set to the stop time of the conveyor. The filling sent to the second control device almost in synchronization with the filling command signal fed from the timing hopper to the same timing hopper through the first control device. The sending of the operation signal to the motor resulting from the delay of the completion signal, the enabling delay within the limits of the assumptions extension time, if when a delay occurs in transmission of the motor driving signal,
An operation control method for accelerating the operation speed of the motor within the delay period by an amount corresponding to the delay time protruding within the assumed extension time and keeping the operation period of the motor constant.