JP4366756B2 - Rotary filling device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a rotary filling device, and more particularly to a rotary filling device that uses an electromagnetic valve for opening and closing a filling valve and electrically controls the timing of filling start.
[0002]
[Prior art]
The rotary filling device generally corresponds to a rotating body that is rotationally driven by a motor, a plurality of container holding means provided on the outer periphery of the rotating body at equal intervals in the circumferential direction, and each of these container holding means. And a plurality of filling valves having an operation valve such as a liquid valve that is provided thereabove and that cuts off the filling liquid passage. Conventionally, an electromagnetic valve is used to control the opening and closing of the liquid valve and the like for opening and closing.
[0003]
In such a rotary filling device, the absolute rotational position of the rotating body is detected by a rotational position detecting means such as an encoder, and an opening command is output to the electromagnetic valve of the filling valve that has reached a predetermined rotational position to operate the electromagnetic valve. Then, the air cylinder is actuated to open the filling valve, and the container is filled.
[0004]
[Problems to be solved by the invention]
As described above, in the rotary filling device in which the solenoid valve is used for opening and closing the filling valve and the timing of the filling start is electrically controlled, the solenoid valve is operated by sending an opening command signal to the solenoid valve. Since there is a time difference until the liquid to be filled actually flows out from the filling nozzle, if the rotation speed of the rotating body fluctuates, the rotation angle at which filling is performed effectively changes. In particular, when the high-speed operation is performed, the rotation angle of the liquid before the liquid flows out from the nozzle increases, so that the rotation angle at which the filling can be performed effectively becomes small. When the rotation angle at which the filling is effectively performed becomes small as described above, there is a problem that the filling accuracy is deteriorated because the flow rate during filling must be increased in order to finish filling in the filling section.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotary filling apparatus that can increase the effective filling angle as much as possible.
[0006]
[Means for Solving the Problems]
A rotary filling device according to the present invention is provided on a rotating body, a plurality of filling valves provided on the outer peripheral portion of the rotating body at equal intervals in the circumferential direction, and the rotating body corresponding to each filling valve. A plurality of container holding means, a rotational position detecting means for detecting the absolute rotational position of the rotating body, and a control device for outputting an opening command to the filling valve at a predetermined rotational position based on a rotational position signal from the rotational position detecting means; includes a further Rutotomoni provided speed detecting means for detecting a rotational speed of the rotating body, sets the valve open position in the rotation speed to a reference as a rotational position that outputs the opening command to the filling valve, the rotating body of If the rotational speed is faster than the rotational speed of the reference is by the control unit, all the filling valves located to the predetermined position in the rotational direction upstream from the valve open position And outputs the opening command and is a rotational position that outputs the opening command to the filling valve that so as to change the rotation direction upstream side from the valve open position.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a plan view showing a schematic configuration of a rotary filling apparatus according to an embodiment of the present invention. Containers 4 that have been continuously conveyed by a container conveying conveyor 2 are spaced at predetermined intervals by a timing screw 6. It is separated and delivered to each pocket of the inlet star wheel 8 that is operated synchronously with the timing screw 6, and further introduced into the rotating body 10 of the filling device that is operated synchronously with the timing screw 6 and the inlet star wheel 8. Is done.
[0008]
The rotating body 10 is provided with a plurality of filling valves 12 at equal intervals in the circumferential direction near the outer periphery, and the containers 4 received from the inlet star wheel 8 are respectively held below the filling valves 12. A container holding means (not shown) for carrying is provided. The rotating body 10 is driven to rotate by a motor 14, and the container 4 delivered from the inlet star wheel 8 to the container holding means is rotated and conveyed as the rotating body 10 rotates. The filling valve 12 is opened and filled with liquid in an angle range (for example, a range from a to d in FIG. 1), and then discharged onto the container transport conveyor 2 via the outlet star wheel 16 to be next Sent to the process.
[0009]
FIG. 2 shows an example of the filling valve 12, and a filling liquid passage 20 for supplying a filling liquid from a filling liquid tank (not shown) to the filling nozzle 18 is blocked by a liquid valve 22. The liquid valve 22 includes a valve body 34 connected to a piston 30 that divides the cylinder 24 into upper and lower pressure chambers 26 and 28 via a piston rod 32, and a valve seat formed on the inner surface of the filling liquid passage 20. 36, and when not in operation, the piston 30 is urged downward by a spring 38 disposed in the upper pressure chamber 26, and the valve body 34 is seated on the valve seat 36, whereby the filling liquid is The passage 20 is closed.
[0010]
The pressure chamber 28 below the piston 30 is connected to an air pressure source via a solenoid valve (not shown), and when pressure air is introduced into the lower pressure chamber 28 by the operation of the solenoid valve. The valve body 34 rises together with the piston 30 to open the liquid valve 22, and the container 4 is filled via the filling liquid passage 20 and the filling nozzle 18. The amount of liquid filled into the container 4 through the filling liquid passage 20 is measured by a flow meter 40 provided in the filling liquid passage 20.
[0011]
FIG. 3 is a block diagram showing the configuration of the control device 42 for controlling the operation of the solenoid valve for opening and closing the liquid valve 22. The operation of the control device 42 will be described with reference to FIG. This rotary filling device is provided with an encoder 44 for detecting the rotational position of the rotating body 10 rotated by the motor 14, and a pulse generated by the encoder 44 as the rotating body 10 rotates is controlled by the control device. 42 is input to the counter 46 and the number of pulses is counted. The rotating body 10 is provided with an origin detection means (not shown) for detecting the origin. When the origin detection means detects the origin, a reset signal 48 is input to the counter 46 and the counter 46 counts. Reset the number. As a result, it is possible to detect that the rotating body 10 has made one revolution and returned to the predetermined reference position.
[0012]
The control device 42 is provided with a rotational speed detecting means 50 for detecting the rotational speed of the rotating body 10. The count number is input from the counter 46, and the rotational speed of the rotating body 10 is determined by the count number per unit time. To detect. Further, the rotational speed can be changed during operation, and is adjusted according to the amount of the container 4 on the upstream side or downstream side of the filling device or when changing to a container 4 of a different size. In this case, a command signal is sent from the speed changing means 52 to the motor 14 to change the rotational speed of the motor 14.
[0013]
In the control device 42, the relationship between the rotation speed of the rotating body 10 and the filling valve 12 to be opened is set in advance and stored as data 54. The calculation means 56 of the control device 42 receives the count number counted by the counter 46 and the rotation speed of the rotating body 10 detected by the rotation speed detection means 50. Determines the number of the filling valve 12 to be opened according to the number of counts from the valve / speed correlation data 54 at this rotational speed, and sends a valve opening command 58 for opening the filling valve 12 of this number to the valve driving means 60. Then, the valve driving means 60 operates the electromagnetic valve to open the corresponding filling valve 12. When the rotational speed of the rotating body 10 is changed, the filling valve 12 to be opened is selected from the relationship between the count number at the rotational speed and the valve position, and a valve opening command 58 is output to the filling valve 12. .
[0014]
A container sensor 62 is provided on the conveyor 2, and the container sensor 62 detects the presence or absence of the container 4 that is transported by the timing screw 6 that is operated in synchronism with the rotating body 10. 56. Only when a container presence signal is input from the container sensor 62 to the calculation means 56, the calculation means 56 recognizes the number of the filling valve 12 corresponding to the container 4, and the valve for the filling valve 12. An opening command 58 is output.
[0015]
【Example】
The operation of the rotary filling apparatus having the above-described configuration will be described with a specific example. When the number of filling valves 12 provided on the rotating body 10 is 30, the count number of the counter 46 is 40 counts and the filling valve 12 is 1 pitch, the rotating body 10 makes one rotation at 1200 counts. Control is performed based on the case of driving at a capacity of 200 bpm, for example, the number 1 valve is opened when the count number by the counter 46 is 100 counts (the valve opening position when the position a in FIG. 1 is 200 bpm is shown) ). Then, the next number 2 valve reaches the position a and is opened when the count number reaches 140 counts. Thereafter, the number 3 valve and the subsequent valves reach the position a in FIG. Thereafter, the number 28 valve is opened at 1180 counts, the counter 46 is reset at 1200 counts, then the number 29 valves are opened at 20 counts, and the number 30 valves are opened at 60 counts.
[0016]
This rotary filling device can adjust the operating capacity (the rotational speed of the rotating body 10), and according to the amount of the upstream or downstream side container 4 or the size of the container 4 to be processed. The driving capacity is changed when the charging capacity is changed due to the change of. For example, when the supply amount of the container to the downstream processing machine has become insufficient, or when the container 4 is filled with 1 liter and then changed to the filling with the container 4 of 500 ml, etc. Increase the driving speed. Therefore, in this embodiment, control is performed by changing the processing capacity from 200 bpm to 400 bpm.
[0017]
In this case, when the count number of the counter 46 reaches 100 counts, the count number is read as 100 to 180 counts, and the three valves number 1, number 2, and number 3 are opened. That is, at the time of 100 counts, the number 1 valve is at the position a in FIG. 1, and the valve opening command is simultaneously issued from this number 1 valve to the number 3 valve on the rear side in the rotational direction by 80 counts (position b in FIG. 1). 58 is output. Next, when the count number reaches 140, this count is read as 140 to 220 counts, and the number 2, number 3, and number 4 valves are opened. Thus, when the operation speed increases, the charging valve 12 on the upstream side (rear side) in the rotational direction is opened as compared with the reference control at 200 bpm.
[0018]
In this embodiment, when operating at a capacity of 200 bpm, a valve opening command 58 is sent to the solenoid valve so as to open the filling valve 12 at the position a in FIG. 1, but at 400 bpm from the position a to the position b. A valve opening command 58 is issued to all the filling valves located between the two and opened. Accordingly, during high speed operation, the solenoid valve is opened earlier than during low speed operation, so there is a time difference between the valve opening command 58 and the time when the liquid valve 22 is actually opened and liquid begins to be filled from the nozzle 18. However, a sufficient effective filling angle can be ensured.
[0019]
In addition, when the operation speed is increased (for example, 400 bpm), it is only necessary to output a valve opening command to the valve on the upstream side of the rotation direction than when operating at a slower speed (for example, 200 bpm). The purpose can be achieved by opening 3 valves (valve opening command 58 is issued at 180 counts when operating at 200 bpm as a reference). Since the opening command 58 for the valve is lost, the valves to be opened are three consecutive valves. Further, the control device 42 is provided with an open valve storage means 64, and the valve for which an open command has been issued is stored until the end of the filling section and is continuously filled.
[0020]
When the operation speed is further increased to 600 bpm, the 100 count is read as 100 to 260 count, and the valve opening command 58 is simultaneously output to the five valves from the number 1 valve to the number 5 valve. That is, at the time of 100 counts, the number 1 valve is at the position a in FIG. 1, and the valve opening command is simultaneously issued from this number 1 valve to the number 5 valve at the rear side in the rotational direction by 160 counts (position c in FIG. 1). 58 is output.
[0021]
When the count number of the counter 46 reaches 140 counts, this count is read as 140 to 300 counts, and opening commands are output to five valves from the number 2 valve to the number 6 valve. In this embodiment, when the engine is operated with a capacity of 600 bpm, the valve opening command 58 is output up to the valve at the position c in FIG. When the operation speed is increased in this way, the timing for outputting the valve opening command 58 is further advanced in accordance with the speed, so that a sufficient effective filling angle can be ensured. In addition, although the container 4 is not yet supplied to the container holding means corresponding to this filling valve at the position c in FIG. 1, when the operation is stopped by the stop signal 66, due to inertia or the like until the rotating body 10 stops. There is no problem even if the valve opening command 58 is output to the corresponding filling valve 12 before the supply of the container 4 as long as it is within the range in which the container 4 is introduced during the rotation. In addition, when the stop signal 66 is input when the driving speed is changed from the standard driving speed (200 bpm) to the high speed driving (400 bpm, 600 bpm) as described above, the control at the reference driving speed is performed. Can be switched to.
[0022]
In the above embodiment, the relationship between the rotation speed set in advance according to the processing speed (in this example, 200 bpm, 400 bpm, 600 bpm) and the filling valve 12 to be opened is stored, and filling is performed based on the data 54. Although the valves 12 are opened sequentially, the valve opening command 58 can be output in a stepless manner according to the fluctuation of the rotational speed instead of such a stepwise command.
[0023]
For example, the calculation means 56 calculates from the count number input from the counter 46 and the rotation speed of the rotating body 10 input from the rotation speed detection means 50 based on the following formula, and calculates the corresponding filling valve 12. Thus, the valve opening command 58 can be output.
Count to be added (n) = speed (BPM) / constant (K) (1)
Count for valve to be opened at current speed (BPMnow) = current count to current count + n (2)
[0024]
For example, assuming that the number 1 valve is opened at 100 counts as in the above embodiment, the current operation speed is 400 bpm, the count number is 100, and the constant (K) = 5, n = 400 / Accordingly, the valve opening command 58 is output to the filling valve 12 corresponding to 100 to 180 counts, that is, the number 1, number 2, and number 3 valves from the equation (2). Further, assuming that the operation speed is 500 bpm and the count number is 150 counts, n = 500/5 = 100, and a valve opening command 58 for valves corresponding to 150 to 250 counts, that is, number 3 and number 4 valves. Is output.
[0025]
In the above embodiment, the flow rate filling device that performs filling while measuring the filling flow rate with the flow meter 40 has been described. However, the present invention is not limited to the flow rate filling device, and may be a weight type filling device or a timer type filling device. As long as the timing of starting filling is electrically controlled, it is applicable. In the above embodiment, when the operation speed is changed, the count number is reread, and the opening command is output to the valve of the number corresponding to the count number. However, the valve number is directly designated. It can also be set. For example, as described above, when operating at 200 bpm and opening the number 1 valve at 100 counts, when changing to 400 bpm, the valve opening command is set to be output to the number 1 to number 3 valves at 100 counts. May be.
[0026]
【The invention's effect】
As described above, according to the present invention, a rotating body, a plurality of filling valves provided on the outer peripheral portion of the rotating body at equal intervals in the circumferential direction, and the rotating body are provided corresponding to the respective filling valves. A plurality of container holding means, a rotational position detecting means for detecting the absolute rotational position of the rotating body, and a control device for outputting an opening command to the filling valve at a predetermined rotational position based on a rotational position signal from the rotational position detecting means in rotary filling apparatus having bets, to set the valve open position in the rotation speed as a reference Rutotomoni provided speed detecting means for detecting a rotational speed of the rotating body, a rotation position that outputs the opening command to the filling valve, when the rotational speed of the rotary body becomes faster than the rotational speed of the reference is by the control device, charge located to a predetermined position in the rotating direction upstream side from the valve open position And outputs the opening command to all valves, by a rotational position that outputs the opening command to the filling valve and to change the rotational direction upstream side from the valve open position, even if the fast rotational speed, sufficient A sufficient filling effective angle can be secured. Therefore, since it can be filled over time at a low flow rate, highly accurate filling can be performed.
[Brief description of the drawings]
FIG. 1 is a plan view showing a simplified overall structure of a rotary filling apparatus according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing an example of a filling valve used in the rotary filling device.
FIG. 3 is a block diagram illustrating a configuration of a control device that performs valve opening / closing control of the rotary filling device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Rotating body 12 Filling valve 14 Motor 42 Control apparatus 44 Rotation position detection means (encoder)
50 Speed detection means

Claims (1)

A rotating body, a plurality of filling valves provided on the outer periphery of the rotating body at equal intervals in the circumferential direction, a plurality of container holding means provided on the rotating body corresponding to each filling valve, In a rotary filling device comprising: a rotational position detecting means for detecting an absolute rotational position; and a control device for outputting an opening command to the filling valve at a predetermined rotational position based on a rotational position signal from the rotational position detecting means.
Rutotomoni provided speed detecting means for detecting a rotational speed of the rotating body, a valve open position in the rotation speed to the reference as the rotational position that outputs the opening command to the filling valve set, the rotation speed of the rotating body and the reference When the rotational speed becomes faster, the control device outputs an opening command to all the filling valves located from the valve opening position to a predetermined position upstream in the rotation direction, and issues an opening command to the filling valve. The rotary filling device, wherein the output rotational position is changed from the valve open position to the upstream side in the rotational direction.

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